JP2705371B2 - Automatic gate closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic gate closing device, and more particularly, to a gate automatic closing device provided with energy storage means and damper means for automatically closing a general household gate. It is about.

[0002]

2. Description of the Related Art In many cases, doors for general households are opened and closed by a person directly pushing and pulling the gates.

On the other hand, in the case of a large gate or the like, a driving source such as a motor is attached to the gate so that when a person or an automobile passes, the gate is automatically opened and closed via activation of the driving source. Some are configured.

A simple type automatic gate closing device is also known in which a spring is incorporated in a hinge for attaching the gate to the gate post so as to be openable and closable, and the gate is automatically closed by utilizing the accumulated elasticity of the spring. It is.

[0005]

When the gate is opened and closed manually, it is difficult to push and pull the gate when the hand is closed. Also, if you forget to close the gate, you will be insecure.

In the method of automatically opening / closing the gate via a motor or the like, the size of the gate opening / closing device is increased, and
The structure becomes complicated, and not only problems such as an increase in installation space and an increase in the number of construction steps occur, but also the gate opening / closing device becomes expensive.

On the other hand, the method of utilizing the stored elasticity of the spring for closing the gate is simple in the structure of the opening and closing device, so that the equipment cost is low, but the restoring force of closing the gate is reduced by the stored elasticity of the spring. Therefore, it is difficult to freely control the closing speed. For this reason, when closing the gate, the gate collides with the stopper at an excessive speed, causing a problem such as breakage.

To solve the above-mentioned drawbacks, Japanese Patent Laid-Open Publication No.
JP-A-129078, JP-A-62-72880, JP-B-63-46835 and the like disclose hinges. These hinges include a spring hinge for accumulating a door-closing force, and a hinge by a spring hinge. It is necessary to provide a screw fitting portion and a spline fitting portion on both the damper hinge for buffering the force, and there is a problem in that the structure is complicated and expensive.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises first and second cylinders attached to a gate post and a gate by means of attachment blades. First
And the other end of the first hinge shaft is inserted into the second cylinder to be screw-fitted, and the inner end of the second cylinder and the insertion end of the first hinge shaft are fixed to each other. A power hinge which axially compresses a spring between the doors, converts the rotational displacement into an axial displacement at the screw fitting portion when the gate is opened, and stores energy for closing the spring in the spring, There are third and fourth cylinders attached to the gate post and the gate by attachment blades, one end of a second hinge shaft is fixed to the fourth cylinder, and the other end of the second hinge shaft Provided with a piston part,
The piston is inserted into the third cylinder so as to be rotatable and axially movable, and the door is closed in a first oil passage communicating between oil chambers at the front and rear parts of the piston in the third cylinder in which the piston is inserted. Installing an oil amount adjusting valve for controlling the speed, and
In the second oil passage installed in parallel with the oil passage, the resistance at the time of opening the gate is reduced, and the flow of oil between the oil chambers at the front and rear of the piston when the piston moves in the closing direction is prevented. The automatic closing device of the gate is constituted by combining with a damper hinge provided with a check valve.

In the above-mentioned apparatus, the power hinge is arranged below, the damper hinge is arranged above, the first cylinder of the power hinge is arranged below, the second cylinder is arranged above, and the third hinge of the damper hinge is arranged. And the fourth cylinder is arranged on the upper side, and the blades of the first cylinder and the third cylinder are attached to the gate post, and the second cylinder and the fourth cylinder are The blades may be attached to the gate, or the power hinge may be located above and the damper hinge may be located below.

Further, the first cylinder of the power hinge is lifted up,
The second cylinder is located below and the third of the damper hinges
Are arranged above and the fourth cylinder below, and the wings of the first cylinder and the third cylinder are attached to the gate post, and the second cylinder and the fourth cylinder are You may implement in the form which attached the blade | wing to the gate.

[0011]

[0012]

According to the structure of the first aspect, it is only necessary to provide a screw fitting portion on the power hinge, and there is no need to provide a screw fitting portion or a spline fitting portion on the damper hinge side. The structure can be simple and inexpensive. According to the second and third aspects of the invention, the weight of the gate can be used for the closing force of the gate, whereby the size of the spring can be reduced, the power hinge can be reduced in size and the structure can be simplified, and the cost can be reduced. can do. Further, the structure of the damper hinge can be simplified and the cost can be reduced. That is,
When the gate is pushed open, a rotational motion is generated between the first cylinder and the second cylinder of the power hinge.
Converted to an axial displacement, the spring means stores the closing energy and the gate is lifted by the axial displacement.
At this time, the check valve of the damper hinge is in an open state and does not cause resistance. When the gate is released, the closing energy accumulated in the spring means and the weight of the gate act as a closing force on the gate, and the axial displacement between the first cylinder and the second cylinder is restored. Then, it is converted into rotational movement in the door closing direction by the screw means. This will automatically close the gate. At this time, the check valve of the damper hinge is closed, and the movement of oil between the oil chambers at the front and rear of the piston is controlled by the oil amount adjustment valve. As a result, the closing speed of the gate is controlled slowly, and the shock when the gate hits the stopper in the closed position is reduced.

[0013]

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a first embodiment of the present invention, a power hinge (1) is fixed to a lower part of a gate post (2) via a blade (3A) as illustrated in FIGS. A first cylindrical body (3), a first hinge shaft (4) inserted from a lower end of the first cylindrical body (3), and a concentric arrangement above the first cylindrical body (3). A second cylinder (5) disposed and fixed to the gate (9) via the blade (5A), and inserted into the second cylinder (5) from inside the first cylinder (3) The compression spring (6) arranged around the first hinge shaft (4) thus formed constitutes a means (10) for storing energy for closing the gate (9). More specifically, the first hinge shaft (4) is fixed to the lower end opening (3B) of the first cylindrical body (3) with a screw (4A) via a washer (7).
Serrations (8) are formed on the outer peripheral surface of the lower trunk portion of the first hinge shaft (4) screwed. A serration (8A) is formed in the shaft hole portion of the first cylindrical body (3) corresponding to the serration (8), and the serration (8) is replaced with the serration (8) on the first cylindrical body side.
A) to engage the first hinge shaft (4)
Are integrated so as not to rotate with respect to the first cylindrical body (3). A male multi-threaded screw (11) is formed on the outer peripheral surface of the intermediate portion of the first hinge shaft (4) extending upward from the formation site of the serration (8). ), The female multi-thread screw (1) having the same pitch as the male multi-thread screw is provided on the inner peripheral surface of the shaft hole of the second cylinder (5).
1A) is formed. By engaging the male multi-thread screw (11) and the female multi-thread screw (11A), the second cylinder (5) connects the first hinge shaft (4) when the gate (9) is opened and closed. An axial displacement converting means (13) is provided which, when rotated about the center, provides a large axial displacement as compared to the rotation angle of the gate (9). On the other hand, a coil-shaped compression spring (6) is fitted between the upper end of the first hinge shaft (4) and the second cylinder (5) via a thrust bearing (12). Thus, the power hinge (1) is provided with a means (10) for storing energy for automatically closing the gate (9). The upper end of the coiled compression spring (6) is fixed to a bracket (14) attached to the upper end of the first hinge shaft (4), while the lower end of the coiled compression spring (6) is connected to the second hinge shaft (4). In order to reduce the sliding resistance when the cylindrical body (5) rotates around the first hinge axis (4),
It is pressed against a thrust bearing (12) disposed on the bearing surface (15) in the second cylinder (5) and is slidably supported.

On the other hand, the damper hinge (20) is
As shown in FIGS. 1, 2 and 4, a third cylinder (21) fixed to the upper part of the gate post (2) via a blade (21A).
And a lower end end cap (2) made of an Al alloy or the like fixed to the lower end opening of the third cylindrical body (21) by screwing.
2), an oil amount adjusting valve (23) screwed into the shaft hole of the lower end cap (22), and an oil amount adjusting valve (23) positioned concentrically with the third cylinder (21) above the third cylinder (21). The fourth cylinder (24) fixed to the upper part of the gate (9) via the blade (24A) so as to perform
The upper end cap (2) attached to the upper end of (1)
5) and a piston portion (2) slidably supported in the axial direction between the small-diameter hollow shaft portion (22A) of the lower end cap (22) and the upper end cap (25).
6A), and a piston portion (26A) of the second hinge shaft (26).
The damper means (27) is formed by the check valve (33) provided in the first embodiment. More specifically, the lower end of the lower end cap (22) has a larger diameter than the hollow shaft portion (22A) above the lower end end cap (22). The lower end side end cap (22) is fixed to the lower end of the third cylindrical body (21) by screwing with a female screw provided on the inner peripheral surface of the lower end of 21). The lower end cap (22) includes the first oil passage (2) in a penetrating state including the upper small-diameter hollow shaft portion (22A).
2B), and an oil amount adjusting valve (23) is provided on the inner peripheral surface of the first oil passage (22B) at the lower end of the large diameter. The tip portion (23B) of the oil amount adjusting valve (23) is formed in a conical shape, and is formed in a small-diameter step portion of the tip portion (23B) and the hollow shaft portion (22A) of the lower end cap (22). (3C) with the closed annular valve seat (22C)
5) functions as a damper that adjusts the amount of oil when the gate (9) is closed to slow down the closing speed. At the base end of the hollow shaft portion (22A) of the lower end side end cap (22), a lateral hole (29) communicating with the piston lower chamber (40) is formed, and a second hinge shaft (26) is formed. Hollow shaft part (26
B) has a lateral hole (30) leading to the piston upper chamber (39).
Are drilled. On the other hand, the piston upper and lower chambers (3A) are provided at the piston portion (26A) at the lower end of the second hinge shaft (26).
9) A second oil passage (34) for communicating (40) is formed, and a check valve (3) is provided at a lower end of the second oil passage (34).
3) is provided. This check valve (33) moves a large amount of hydraulic oil in the upper piston chamber (39) to the lower piston chamber (40) at a large flow rate when the gate (9) is opened, and when the gate (9) is closed. , To block the flow of hydraulic oil. The second hinge shaft (26) has a lower end side piston portion (26A) inserted in the third cylindrical body (21) so as to be rotatable and slidable along the axial direction, and has an upper end side end. The fourth cylinder (2) penetrates through the cap (25).
4) The upper end of the second hinge shaft (26) projecting inward is integrally connected to the fourth cylinder (24) by a fastening screw (38). By employing the above-described assembling structure, the upper and lower chambers (39) and (4) of the piston portion (26A) of the second hinge shaft (26) are provided in the third cylinder (21).
By controlling the flow of the hydraulic oil of 0), the gate (9) does not become a resistance when it is opened, and becomes a damper when it is closed. In FIG. 4, (4
1) shows a 0 ring, (42) shows a bearing metal, and (43) shows a holding ring of a check valve (33).

As for the material of the oil amount adjusting valve (23), the viscosity characteristic of the above-mentioned hydraulic oil changes depending on the level of the air temperature, and the same gap (3) is used.
Even in 5), since the flow characteristics of the hydraulic oil change, there is a problem that the closing speed changes. To prevent this, even if the flow characteristics change due to a change in the viscosity of the hydraulic oil due to a change in the temperature, the closing speed is changed. In order to automatically adjust the gap (35) so as to maintain a constant value, a resin having a different linear expansion coefficient from the metal lower end cap (22) and a high degree of expansion and contraction is employed. For example, commercially available Duracon (registered trademark) is one of the preferable ones. Further, the tip angle of the oil amount adjusting valve (23) is determined by selecting the change rate of the gap (35) with respect to the level of the air temperature in consideration of the relationship between the amount of the hydraulic oil, the change rate of the viscosity, the discharge pressure and the like. . Hydraulic oil is maintained in the hollow portion inside the second hinge shaft (26) while leaving a predetermined air holding space at the top.

Hereinafter, the operation of the automatic gate closing device according to the present invention will be described based on the above specific example. When the gate (9) is pushed open, the rotation of the second cylinder (5) causes the male multi-threaded screw (11) formed on the outer peripheral surface of the first hinge shaft (4),
The second cylindrical body (5) is screwed with the female multi-threaded screw (11A) formed on the inner peripheral surface at the lower end of the second cylindrical body (5) with respect to the first cylindrical body (3). Lift up. Due to this axial displacement (L2), the compression spring (6) contracts by (L2), and the power hinge (1) accumulates restoring elasticity for reversely rotating the gate (9) toward the closed position. At this time, in the damper hinge (20), the check valve (33) is opened, the hydraulic oil in the upper piston chamber (39) moves without resistance to the lower piston chamber (40), and the piston portion (26A) is moved to (L2). Just rising.

When the hand is released from the gate (9), the second cylinder (5) is pressed in the descending direction by the restoring elasticity accumulated in the compression spring (6). As a result, the male multi-start screw (1
1) and the female multi-threaded screw (11A)
The cylindrical body (5) descends while rotating in the closing direction of the gate (9). At this time, the check valve (33) of the damper hinge (20) is closed, and the hydraulic oil flows from the lower chamber (40) to the upper chamber (39) only through the gap (35) of the flow control valve (23).
Will be moved to. For this reason, the closing speed of the gate (9) is controlled slowly.

FIG. 5 is a longitudinal sectional view showing a second specific example of the damper hinge (20). The damper hinge (20) includes a third cylinder (21), a fourth cylinder (24), a second hinge shaft (26), an oil amount adjusting valve (23), and a check valve (3).
The configuration of 3) is the same as that shown in FIGS. 1 to 4, except that the oil amount adjusting valve (23) is inserted from above the second hinge shaft (26). Therefore, the upper end portion (23D) of the oil amount adjusting valve (23) is made of stainless steel in consideration of rust resistance, and the oil amount adjusting valve (23) located inside the second hinge shaft (26). Relay section (23
E) is made of ordinary iron or steel in consideration of economy, and has an oil amount adjusting valve (23) made of Duracon resin connected to the lower end. Upper end (23D) of oil amount adjustment valve (23)
Is screwed to the upper end of the second hinge shaft (26), and is joined and fixed to the relay portion (23E) using fixing means (50) such as caulking. The relay section (23E) and the lower end section (23
As the means for fixing to F), a screw-in structure (51) is used. Lower end (23F) of oil amount adjustment valve (23)
Is the flow path gap of hydraulic oil due to the temperature difference between winter and summer (3
The length in the axial direction is appropriately set in order to keep the change in 5) within an allowable limit.

FIG. 6 is a longitudinal sectional view showing a third specific example of the damper hinge (20). Damper hinge (20)
However, the point that is constituted by the third cylinder (21), the fourth cylinder (24), the second hinge shaft (26), the oil amount adjusting valve (23) and the check valve (33). 1 to 4 except that a through hole (52) for air bleed is provided at the upper end of the hollow portion of the second hinge shaft (26), and a fiber or the like is provided above the through hole (52). Permeable filter material (5
3) is filled and fixed with a lid (54) made of a gas-permeable material such as a mesh wire mesh.

When this method is adopted, the flow of the hydraulic oil becomes smooth.

The first embodiment of the present invention will be described with reference to FIGS.
Although specific examples and modifications thereof have been described, the scope of the present invention should not be construed as being limited thereto,
The present invention can be implemented in the following forms.

That is, the power hinge (1) and the damper hinge (20) are turned upside down in FIG.

The power hinge (1) is used upside down in FIG. 3, and the damper hinge (20) is used upside down in FIG.

[0025]

[0026]

According to the first aspect of the present invention, it is only necessary to provide a screw fitting portion on the power hinge, and there is no need to provide a screw fitting portion or a spline fitting portion on the damper hinge side. The entire structure can be simple and inexpensive. According to the second and third aspects of the invention, the weight of the gate can be used for the closing force of the gate, whereby the size of the spring can be reduced, the power hinge can be reduced in size and the structure can be simplified, and the cost can be reduced. can do. Further, the structure of the damper hinge can be simplified and the cost can be reduced.

According to the second and third aspects of the present invention, in addition to the above-described effects, the self-weight of the gate and the energy for automatically closing the spring means can be utilized when the gate is closed.
According to the invention of claim 4, the own weight of the gate cannot be used, but the same effect as the invention of claim 1 can be obtained. Therefore,
It can be used for both ascending gates and descending gates depending on the structure and installation conditions of the gates and columns. According to the third and fourth aspects of the present invention, since the oil amount adjusting valve is disposed at the upper part, fine adjustment of the oil amount adjusting valve is facilitated.

[0028]

[Brief description of the drawings]

FIG. 1 is a plan view of an automatic gate closing device.

FIG. 2 is a front view of an automatic gate closing device.

3A is a longitudinal sectional view of the power hinge when the gate is closed, and FIG. 3B is a longitudinal sectional view of the power hinge when the gate is opened.

FIG. 4A is a longitudinal sectional view of the damper hinge when the gate is closed, and FIG. 4B is a longitudinal sectional view of the damper hinge when the gate is opened.

FIG. 5 is a longitudinal sectional view showing a second specific example of the damper hinge.

FIG. 6 is a longitudinal sectional view showing a third specific example of the damper hinge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power hinge 2 Gate pillar 3 1st cylinder 4 1st hinge axis 5 2nd cylinder 6 Spring 9 Gate 11 Screw 20 Damper hinge 21 3rd cylinder 23 Oil amount adjustment valve 24 4th cylinder 26 Second hinge shaft 33 Check valve 39 Piston upper chamber 40 Piston lower chamber

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-129078 (JP, A) JP-A-62-272880 (JP, A) JP-B-63-46835 (JP, B2)

Claims (4)

(57) [Claims] 1. A first and a second cylinder attached to a gate post and a gate by an attachment blade, and one end of a first hinge shaft is fixed to the first cylinder, and the first hinge shaft is fixed to the first cylinder. The other end of the hinge shaft is inserted into the second cylinder and screw-fitted.
A spring is axially compressed and interposed between the inner part of the cylindrical body and the insertion end of the first hinge shaft, and when the gate is opened, the rotational displacement is converted into the axial displacement by the screw fitting portion to close the spring. Hinges for storing energy for use, and third and fourth cylinders attached to a gate post and a gate by means of attachment blades, wherein the fourth cylinder has a second hinge shaft. One end is fixed, a piston portion is provided at the other end of the second hinge shaft, and this piston portion is inserted into the third cylindrical body so as to be rotatable and movable in the axial direction, and the third portion is formed by inserting the piston portion. An oil amount adjusting valve for controlling a door closing speed is provided in a first oil passage communicating between oil chambers at the front and rear portions of the piston in the cylinder, and
In the second oil passage installed in parallel with the first oil passage, the resistance at the time of opening the gate is reduced, and the oil flows between the oil chambers at the front and rear of the piston when the piston moves in the closing direction. An automatic closing device for a gate, comprising a combination with a damper hinge provided with a check valve for preventing air flow. 2. The power hinge is disposed below, the damper hinge is disposed above, and the first cylinder of the power hinge is disposed below,
And the fourth cylinder is disposed above the third cylinder of the damper hinge, and the blades of the first cylinder and the third cylinder are disposed on the gate post. Attach the second
The automatic closing device for a gate according to claim 1, wherein the blades of the cylindrical body and the fourth cylindrical body are attached to the gate. 3. A power hinge is arranged on an upper side, a damper hinge is arranged on a lower side, and a first cylinder of the power hinge is arranged on a lower side, and
And the fourth cylinder is disposed above the third cylinder of the damper hinge, and the blades of the first cylinder and the third cylinder are disposed on the gate post. Attach the second
The automatic closing device for a gate according to claim 1, wherein the blades of the cylindrical body and the fourth cylindrical body are attached to the gate. 4. A first cylinder of the power hinge is located above, a second cylinder of the power hinge is located below, a third cylinder of the damper hinge is located above, and a fourth cylinder is located below, and 2. The gate of claim 1, wherein the blades of the first cylinder and the third cylinder are attached to the gate post, and the blades of the second cylinder and the fourth cylinder are attached to the gate. Automatic closing device.