JPH08456Y2 - Auto hinge for door - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a semi-concealed type door automatic hinge for a hinged door, in which a door is automatically closed and an automatic hinge body incorporating a mechanism for adjusting the closing speed is incorporated into the door. It is about.

[0002]

2. Description of the Related Art A door auto hinge installed on a hinged door uses a force to open the door to accumulate elastic force in a torsion spring built into the main body of the auto hinge. The door is closed by the restoring force and the flow of the fluid contained in the auto hinge body is adjusted to control the closing speed.

A door provided with a door automatic hinge is, for example, as shown in FIG. 5, a door hinge (3) between the upper and lower ends of the entrance and exit of the wall (1) and the upper and lower ends of the door (2).
Assemble (4) and attach the door (2) to the door hinge (3).
The lower door hinge (4) is provided with an auto hinge main body (5) incorporating a mechanism that supports the door (2) to be opened and closed freely and automatically closes the opened door (2) and adjusts the closing speed thereof. The auto hinge body (5) is built in the door (2).

The upper door hinge (3) has a fixed hinge bracket (6) attached to the wall (1) as shown in FIG.
The movable hinge bracket (7) is attached to the upper surface of the door (2), the pivot shaft (10) is projected upward from below the movable hinge bracket (7), and the upper part of the pivot shaft (10) is fixed to the fixed hinge bracket (6). Slide bush (1
It is rotatably supported via 1).

As shown in FIG. 7, the lower door hinge (4) has a fixed hinge bracket (13) attached to the floor (12) and a movable hinge bracket (14) attached to the lower surface of the door (2).
The pinion shaft (16) is integrally coupled to the pivot shaft (15) attached to the fixed hinge bracket (13), and the upper part of the pinion shaft (16) is attached to the movable hinge bracket (14) via the bearing (17). It is rotatably supported.

Therefore, the door (2) opens and closes with the pivot shaft (10) provided on the upper door hinge (3) and the pinion shaft (16) provided on the lower door hinge (4) as the center of rotation. The automatic hinge body (5) is integrally provided on the movable hinge bracket (14) of the lower door hinge (4).

The auto hinge body (5) includes a power storage mechanism (20) for applying a closing force to the door (2) and a speed adjusting mechanism (21) for adjusting the closing speed of the door (2). It's complicated. The power storage mechanism (20) passes through the movable hinge bracket (14) and rotates the rotating shaft (23) in the cylindrical case (22) of the auto hinge main body (5) via the bearing (24). It is freely supported, a rotary gear (25) is keyed to the lower part of the rotary shaft (23), and a torsion spring (26) is mounted to the upper part. The torsion spring (26) engages the lower locking portion (26a) with the collar (27) mounted on the rotating shaft (23), and the upper locking portion (2).
6b) is locked to a slide collar (30) connected to a cylindrical case (22). The collar (27) is sandwiched between the bearing (24) and the step (32) of the rotary shaft (23) and rotates integrally with the rotary shaft (23), and the slide collar (30) is a tubular case. The torsion spring (26) is twisted by the rotation of the rotating shaft (23) because it is fixed to the seat (22) and does not rotate, and stores an elastic force.

Further, the rotary gear (25) key-connected to the rotary shaft (23) has a pinion shaft (25) through an idle gear (33) attached to a movable hinge bracket (14) as shown in FIG. 16) the pinion gear (3
It meshes with 4). The rotating gear (25) and the idle gear (33) are configured to rotate while revolving around the pinion gear (34) and rotate around the pinion gear (34) as the door (2) is opened and closed. The rotation shaft (23) is rotated by rotating in a predetermined direction.

Therefore, when the door (2) is opened, the rotary shaft (23) is rotated, and the torsion spring (26) is twisted to store elastic force. When the opening force to the door (2) disappears, The rotation shaft (23) is reversed by the elastic force of the torsion spring (26), and the door (2) is automatically closed.

The speed adjusting mechanism (21) includes a cylindrical case (2).
A cylinder (35) filled with a working fluid is contained in 2), the cylinder body (36) is rotated integrally with the rotating shaft (23), and the rotation causes a piston (37) contained in the cylinder body (36). Is moved up and down, and the flow rate of the working fluid flowing between the upper chamber (40) and the lower chamber (41) as the piston (37) moves up and down is adjusted by the flow rate adjusting valve (42). The rotation speed of 23) is adjusted.

That is, as shown in FIG. 9, the cylindrical case (2
A hollow guide member (43) is inserted into the upper end of 2) and fixed, the cylinder body (36) is inserted into the cylindrical case (22), and the lower end of the cylinder body (36) is attached to the rotary shaft (23).
The outer periphery of the upper end of the
4) and a slide bush (45) are rotatably supported by a guide member (43). The piston (37) located in the cylinder body (36) is cylindrical and
A male feed screw (46) is formed on the outer peripheral surface of the lower portion, and is screwed into a female screw (47) for feed formed on the inner peripheral surface of the lower portion of the cylinder body (36). Further, a female spline (50) is formed on the inner peripheral surface of the piston (37), and a male spline (51) formed on the lower shaft portion of the guide member (43).
It meshes with and is not rotatable and can only be moved up and down. Therefore, the piston (37) is the cylinder body (36).
When is rotated, it is guided by the female spline (50) and the male spline (51) by the screwing relationship between the female screw (47) and the male screw (46) to move up and down.

At the lower end of the piston (37) is a partition wall (5
2) is attached to form a lower chamber (41) and an upper chamber (40) through which the working fluid flows in and out with the partition wall (52) interposed, and the lower chamber (41) is formed at the center of the partition wall (52). A flow passage (53) communicating with the upper chamber (40) is formed, and a check valve (54) is provided in a part of the periphery. The check valve (54) prevents the working fluid from flowing into the upper chamber (40) from the lower chamber (41).

The flow rate adjusting valve (42) is provided with an adjusting shaft (5
A needle (56) is rotatably and swingably attached to the lower end of 5), a position adjusting male screw (57) is formed on the lower outer peripheral surface of the adjusting shaft (55), and an adjusting valve gear (6) is provided at the upper end.
0) is attached integrally. Further, the needle (56) is tapered so that the diameter gradually increases from the upper end to the lower part. The flow rate adjusting valve (42) is inserted into the guide member (43) from the upper end side, and the position adjusting male screw (5
7) is screwed onto the female screw (61) for position adjustment formed on the guide member (43), and the needle (56) is attached to the partition wall (5).
It passes through the flow passage (53) formed in 2). A seal member (62) is mounted between the guide member (43) and the adjusting shaft (55) to prevent the working fluid filled in the cylinder body (36) from leaking.

In the door automatic hinge having the above structure, when the door (2) is opened, the movable hinge bracket (14) is provided.
Rotates about the pinion shaft (16), and the pinion shaft (1
6) via the idle gear (33) meshing with the pinion gear (34) and the rotary gear (25).
3) Rotate, and elastic force is accumulated in the torsion spring (26). At the same time, the cylinder body (36) also rotates integrally with the rotary shaft (23), and the piston (37) is raised. When the piston (37) rises, the cylinder body (3
The working fluid flows from the upper chamber (40) of 6) to the lower chamber (41). The working fluid flows from the upper chamber (40) of the cylinder body (36) into the lower chamber (41) of the check valve (54) and the needle (56) provided in the partition wall (52) and the flow passage (53). ), It flows through a gap with
The door (2) opens without resistance.

When the door (2) is released, the elastic force of the torsion spring (26) causes the rotating shaft (23) to rotate in the reverse direction to close the door (2). At this time, the cylinder body (36) also rotates in the reverse direction, and the piston (37) descends. Piston (3
When descending 7), the check valve (5) provided on the partition wall (52)
4) is closed and the working fluid flows from the lower chamber (41) into the upper chamber (40) by the flow passage (53) formed in the partition wall (52) and the needle (56) of the flow control valve (42).
Since it is performed from the gap between the cylinder body and the cylinder body, the flow rate is throttled and the lowering speed of the piston (37) becomes slower.
Since the rotation speed of the rotary shaft (23) also slows down, the closing speed of the door (2) slows down and the door (2) closes slowly.

The needle (5) of the flow rate adjusting valve (42)
Since 6) is tapered, the adjustment shaft (55) is rotated to move up and down, the needle (56) and the partition wall (52) are relatively aligned, and the size of the gap is adjusted. By adjusting the flow rate of the working fluid, the door (2)
The closing speed of can be adjusted.

In FIG. 9, the piston (3
Although 7) is raised to the vicinity of the rising end, the amount of movement of the piston (37) is small when actually opening and closing the door.

[0018]

In the above automatic door hinge, the closing speed of the door (2) is adjusted by the needle (56) of the flow rate adjusting valve (42) and the partition wall (52) of the piston (37). This is done by adjusting the flow rate of the working fluid flowing through the gap between the flow passage (53).
The viscosity and the pour point of the working fluid change due to temperature changes, the viscosity becomes high at low temperature and becomes difficult to flow, and the viscosity becomes low at high temperature to easily flow. Therefore, the closing speed of the door (2) is different between the low temperature and the high temperature.

The needle (56) of the conventional flow rate adjusting valve (42) can adjust the flow rate to some extent, but since its diameter is uniquely determined, it corresponds to a large temperature change as described above. Therefore, two kinds of flow rate adjusting valves (42) each having a low temperature needle and a high temperature needle are prepared and replaced according to the operating temperature.

Therefore, if the viscosity of the working fluid changes between low temperature and high temperature, the auto hinge body must be disassembled and assembled, which is very troublesome. Also, two types of flow rate adjustment valves must be prepared, and the flow rate adjustment valve (4
Since the working fluid may leak during the replacement of 2), the work and management were troublesome.

The present invention is intended to provide an automatic door hinge which can cope with a low temperature and a high temperature only by aligning the flow rate adjusting valve without replacing the flow rate adjusting valve.

[0022]

SUMMARY OF THE INVENTION According to the present invention, a force is applied to a door in a closing direction in a movable side hinge bracket of a lower door hinge for holding a door and a cylindrical case attached to the movable side hinge bracket. Power storage mechanism, an auto hinge main body having a speed adjusting mechanism for adjusting the closing speed of the door, and a gear mechanism for transmitting the opening / closing operation of the movable side hinge bracket to the power storage mechanism. A mechanism is wound around the rotating shaft rotatably supported in the cylindrical case, the lower end is engaged with the rotating shaft side, and the upper end is on the cylindrical case side. And a torsion spring engaged with the speed adjusting mechanism, a male spline is formed on the lower outer peripheral surface, and a female screw for position adjustment is formed on the inner peripheral surface. The hollow guide member attached to the upper end and the lower A female body is formed on the inner peripheral surface, is housed in the cylindrical case, the lower end is coupled to the rotating shaft, and the upper end is rotatably supported by the guide member. A male screw for feeding that is screwed with a female screw for feeding of the cylinder body is formed, and a female spline that meshes with the male spline of the guide member is formed on the inner peripheral surface, and the female spline is arranged between the cylinder body and the guide member. And a partition wall that forms a flow passage in the center and is attached to the lower end of the piston, and a check valve that is provided on the partition wall and allows only the working fluid to flow from the upper chamber to the lower chamber. And a lower end portion having a needle penetrating the flow passage of the partition wall, and a position adjusting male screw screwed with a position adjusting female screw of the guide member is formed on the outer peripheral surface, and the position adjusting male screw is inserted into the guide member. With the flow rate control valve Then, the lower end portion of the needle is formed in a multi-stage shape, and the first adjustment shaft portion having a large diameter is located on the lower side and the second adjustment shaft portion having a smaller diameter than the first adjustment shaft portion is located on the upper side with the annular groove interposed therebetween. The first adjusting shaft portion and the second adjusting shaft portion are selectively formed in the flow passage of the partition wall based on the rotation of the flow rate adjusting valve.

[0023]

In the door auto hinge, the second adjusting shaft of the needle of the flow rate adjusting valve is arranged in the flow passage of the partition wall of the piston when the viscosity of the working fluid filled in the cylinder body is high at low temperature. The clearance between the flow passage and the needle is set wide, and when the viscosity of the working fluid is low at high temperature, the first adjusting shaft portion of the needle is arranged in the flow passage of the partition wall,
Set a narrow gap between the flow passage and the needle before use.

Thus, the flow resistance of the working fluid passing through the gap between the needle and the flow passage can be set according to the low temperature or the high temperature, and the closing speed of the door can be always optimized without changing the flow rate adjusting valve. Can be adjusted.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. However, the same components as those of the prior art shown in FIGS. 7 and 9 are designated by the same reference numerals, and the description thereof will be omitted.

The features of the present invention are as shown in FIGS.
The tip portion of the needle (56) of the flow rate adjusting valve (42) that constitutes the speed adjusting mechanism (21) is formed in a multi-stage shape, and the first adjusting shaft having a large diameter downward is sandwiched by the annular groove (63). Forming a portion (64) and having a small diameter second adjusting shaft portion (65) on the upper side.
Has been formed. Further, the taper is made from the second adjusting shaft portion (65) to the upper end. The first adjusting shaft portion (64) is formed to have a diameter that optimizes the clearance between the first adjusting shaft portion (64) and the flow passage (53) formed in the partition wall (52) of the piston (37) at high temperature. The second adjustment shaft portion (65) is connected to the first adjustment shaft portion (6
4) The diameter is smaller than that of 4), and the diameter is formed so that the gap between the flow passage (53) and the flow passage (53) is optimized at low temperature.

The adjusting shaft (5) of the flow rate adjusting valve (42)
An adjusting valve gear (60) is attached to the upper end of 5). The adjusting valve gear (60) is, as shown in FIG.
A large number of grooves (66) are formed at equidistant positions on the circumference, an elongated hole (67) is formed in the center, and the elongated hole (67) is formed at the upper end of the adjustment shaft (55). It is fitted to the portion (70) and attached with screws (71). Therefore, by rotating the adjusting valve gear (60), the adjusting shaft (55) is rotated to rotate the first adjusting shaft portion (64) or the second adjusting shaft portion (64).
The adjusting shaft (65) is connected to the partition wall (52) of the piston (37).
It is placed in the flow passage (53) of the.

The automatic door hinge equipped with the flow rate adjusting valve (42) has a piston (1) for adjusting the first adjusting shaft portion (64) formed on the needle (56) of the flow rate adjusting valve (42) when the temperature is high. It is placed in the flow passage (53) of the partition wall (52) of (37). On the contrary, when the temperature is low, the second adjusting shaft portion (65) of the needle (56) is arranged in the flow passage (53) of the partition wall (52) as shown in FIG.

Then, at high temperature, the working fluid filled in the cylinder (35) has a low viscosity and a good fluidity, and accordingly, the needle (56) and the piston (37) of the flow rate adjusting valve (42). The gap between the partition wall (52) and the flow passage (53) is narrow, and the door (2) is closed at an optimum speed. Further, at low temperature, the viscosity of the working fluid is high and the fluidity is poor, but the needle (56) of the flow rate adjusting valve (42) and the partition wall (52) of the piston (37).
The gap with the flow passage (53) is large, and the door (2) is closed at an optimum speed.

In this way, the door (2) can be closed at an optimum speed regardless of whether the temperature is high or low by simply rotating the flow rate adjusting valve (42) and adjusting the position relative to the piston (37). .

[0031]

According to the present invention, even if the viscosity of the working fluid changes between low temperature and high temperature, it is not necessary to disassemble the auto hinge body, and the flow rate adjustment of the speed adjusting mechanism incorporated in the auto hinge body is performed. By rotating the valve and arranging the first adjusting shaft portion or the second adjusting shaft portion formed on the needle of the flow rate adjusting valve into the flow passage formed on the partition wall of the piston, the cylinder can be operated at low temperature or high temperature. Even if the viscosity of the working fluid filled in the main body changes, the closing speed of the door can be arbitrarily adjusted without replacing the flow rate adjusting valve. Further, since it is not necessary to replace the flow rate adjusting valve, there is no need to manage the flow rate adjusting valve, and the troublesome work is released.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of an automatic door hinge according to the present invention.

FIG. 2 is a sectional view showing a main part of an automatic door hinge according to the present invention.

FIG. 3 is an enlarged sectional view showing the relationship between the needle and the flow passage of the partition wall according to the present invention.

FIG. 4 is a plan view of a flow rate adjusting valve according to the present invention.

FIG. 5 is a perspective view showing a door equipped with an automatic door hinge.

FIG. 6 is a cross-sectional view showing an upper door hinge that supports a door.

FIG. 7 is a sectional view showing a conventional automatic door hinge.

FIG. 8 is a bottom view showing a gear mechanism that transmits opening / closing of a door.

FIG. 9 is a sectional view of an essential part showing an operation example of a conventional automatic door hinge.

[Explanation of symbols]

 2 Door 5 Auto hinge main body 14 Movable hinge bracket 20 Power storage mechanism 21 Speed adjustment mechanism 22 Cylindrical case 23 Rotating shaft 25 Rotating gear 26 Torsion spring 36 Cylinder body 37 Piston 40 Upper chamber 41 Lower chamber 42 Flow rate adjusting valve 43 Guide member 46 Feeding male screw 47 Feeding female screw 50 Female spline 51 Male spline 52 Partition wall 53 Flow passage 54 Check valve 55 Adjusting shaft 56 Needle 57 Position adjusting male screw 61 Position adjusting female screw 64 First adjusting shaft 65 Second adjustment Shaft

Claims (1)

[Scope of utility model registration request] Claims: 1. A door auto hinge mounted near the center of rotation when opening and closing a hinged door, wherein a movable side hinge bracket of a lower door hinge for holding the door and a tubular shape mounted on the movable side hinge bracket. A force accumulating mechanism that applies a force in the closing direction to the door in the case, an auto hinge main body that incorporates a speed adjusting mechanism that adjusts the closing speed of the door, and an opening / closing operation of the movable side hinge bracket are performed by the accumulating force. A gear mechanism for transmitting the force accumulating mechanism to the mechanism, and the power storage mechanism is rotatably supported in the cylindrical case; And a torsion spring whose upper end is engaged with the side of the cylindrical case, and the speed adjusting mechanism forms a male spline on the lower outer peripheral surface and adjusts the position on the inner peripheral surface. Forming an internal thread for the cylindrical case A hollow guide member attached to the upper end of the same, and a female screw for feeding formed on the inner surface of the lower part, accommodated in the cylindrical case, the lower end is coupled to the rotary shaft, and the upper end is the guide member. A rotatably supported cylinder body, a female external spline formed on the outer peripheral surface to be screwed with the female female thread of the cylinder main body, and a female spline that meshes with the male spline of the guide member on the inner peripheral surface. A piston that is formed between the cylinder body and the guide member, a partition wall that forms a flow passage in the center and that is attached to the lower end of the piston, and the partition wall that is provided in the upper chamber To a lower chamber, only a check valve that allows the working fluid to flow therethrough, and a needle that penetrates the flow passage of the partition wall at the lower end are screwed onto the outer peripheral surface with the female screw for adjusting the position of the guide member. Form a male screw for position adjustment A flow rate adjusting valve inserted into the guide member, the lower end portion of the needle is formed in a multi-stage shape, and a large-diameter first adjusting shaft portion is provided on the lower side and an upper side is provided on the upper side by sandwiching the annular groove. A second adjusting shaft portion having a diameter smaller than that of the first adjusting shaft portion is formed, and the first adjusting shaft portion or the second adjusting shaft portion is selectively arranged in the flow passage of the partition wall based on the rotation of the flow rate adjusting valve. An auto hinge for a door, which is characterized by: