JPH10280794A - Floor hinge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dissolve a problem, such as an impossibility for a door to effect automatic opening owing to difficulty in a flow of working oil through a return hole occasioned by choking an introduction port with metal scraps since the sectional area of the induction hole is throttles to regulate the rotation speed of a rotary shaft such that a door is slowly closed when metal scraps are produced and are mixed in working oil resultant from slide of a piston over the wall surface of a body. SOLUTION: A floor hinge comprises a piston 10 arranged through a coupling means R in a manner to effect reciprocation movement through rotation of a rotary shaft 3; and a spring 14 to energize the rotary shaft 3 in a closing direction. When a door is rotated in an opening direction, working oil I is fed from one cylinder chamber S1 to the other cylinder chamber S2, and when the door is rotated in a closing direction, working oil I is fed from the other cylinder chamber S2 to one cylinder chamber S1. Further, when the door is rotated in a closing direction, a valve device 30 to regulate a flow rate of the working oil I such that the rotation speed of the door is prevented from an increase to a too high value and a magnetic filter device 41 to attract metal scraps is arranged in a second chamber S2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor hinge for supporting a building door at a lower portion.

[0002]

2. Description of the Related Art Hitherto, there has been known a floor hinge which is buried in a floor surface to support a lower part of a door of a building and biases the door in a closing direction by a biasing force of a spring housed therein. .

[0005] In the cross-sectional views showing an example of the floor hinges shown in FIGS. 5 and 6, reference numeral 1 denotes a main body of a floor hinge installed on a floor or the like.
A rotating shaft 3 protruding from the upper end of the door 2 and being fitted to and coupled to the lower portion of the door 2, attached to the rotating shaft 3 and having a substantially semicircular curved surface 4a formed at one end thereof; A horizontal cam plate 4 having curved surfaces 4b and 4c close to the mold, and a pair of rollers located above and below the cam plate 4 and abutting on the curved surfaces 4a, 4b and 4c of the cam plate 4 between one ends thereof Sliding plates 6 and 6 interposed between the sliding plates 6 and 6 which are horizontally moved by the rotation of the cam plate 4 and one end thereof are connected by two pins 7 and 7 between the other ends of the sliding plates 6 and 6. Two rods 8, 8 parallel to each other and a pair of pistons 10, 10 connected to the other end of each rod 8, 8 by a pin 9 and arranged via a separation wall 1A.
The rods 8, 8 and the sliding plates 6, 6 are interposed between a spring receiver 12 supported by pins 11 near the other ends of the rods 8, 8 and a spring receiver 13 supported inside the main body 1. A spring 14 for urging the rotating shaft 3 to bias the door 2 in the closing direction via the rollers 5, 5 and the cam plate 4 and the rotating shaft 3; Hydraulic oil I or the like filled so that the flow rate is adjusted by a valve device 30 described later that adjusts the operation speed of the pistons 10 and 10 so that the rotation speed of the door 2 is not excessively high is stored. The sliding plates 6 and 6 are formed with long holes 6a so that they can be fitted to the rotating shaft 3 and slide horizontally with respect to the rotating shaft 3.

The main body 1 is separated into cylinder chambers S1 and S2 by pistons 10 and 10,
Outgoing holes 31 for supplying hydraulic oil I from one cylinder chamber S1 to the other cylinder chamber S2 are formed at 0 and 10.

[0005] Each of the valve devices 30 includes the separation wall 1A,
A pair of introduction holes 32, 33, which are arranged side by side on the wall surface of the separation wall 1A and whose cross section is narrowed to adjust the rotation speed of the rotating shaft 3 so that the door 2 closes slowly,
33 and one end thereof is connected to one cylinder chamber S1.
And a return hole 34 opened to the outside.

[0006]

In the above configuration, when the door 2 is opened, the rotary shaft 3 rotates integrally with the door 2 and the cam plate 4 also rotates. Thereby, the curved surface 4a of the cam plate 4
Slide plates 6 and 6 having a pair of rollers 5 and 5 abutting against 4b and 4c are pushed by cam plate 4 and move in the direction of arrow A in FIG. The rods 8, 8 and the pistons 10, 10 also move in the same direction. At this time,
The hydraulic oil I passes through the outgoing hole 31 and is supplied from one cylinder chamber S1 to the other cylinder chamber S2. Further, the spring 14 is pressed by the spring receiver 12 and contracts.

[0007] Then, when you release your hand from the opened door 2,
By the urging force of the spring 14, the pistons 10, 10,
The rods 8, 8, the sliding plates 6, 6, and the rollers 5, 5 try to return to their original positions, and the cam plate 4 is pushed by the rollers 5, 5 so as to return to their original positions. The flow rate of the oil I is adjusted from the other cylinder chamber S2 to the one cylinder chamber S1, and the oil 2 enters the return hole 34 from the introduction holes 32 and 33, whereby the rotation speed of the rotating shaft 3 is adjusted and the door 2 closes. .

When the pistons 10, 10 slide on the wall surface of the main body 1, or the curved surfaces 4a, 4b, 4c of the cam plate 4 come into contact with the rollers 5, 5, metal chips are generated. , Mixed into the working oil I. As described above, since the cross-sectional areas of the introduction holes 32 and 33 are narrowed to adjust the rotation speed of the rotation shaft 3 so that the door 2 closes slowly, metal dust mixed in the hydraulic oil I is introduced. Holes 32, 33
And the hydraulic oil I becomes difficult to flow through the return hole 34, so that the door 2 cannot be automatically closed.

Accordingly, an object of the present invention is to provide a floor hinge which can automatically and smoothly close a door for a long period of time even if metal dust is mixed in hydraulic oil which can solve the above problems.

[0010]

Means for solving the problems of the present invention include a rotating shaft provided on the main body such that an upper end thereof protrudes from the main body and supporting the door at a lower portion;
A piston provided via a connecting means so as to reciprocate by the rotation of the rotating shaft, and a spring for urging the rotating shaft in a closing direction via the connecting means, wherein the main body includes a piston. Divided into a first room and a second room,
Hydraulic oil is supplied from the first chamber to the second chamber when the door rotates in the opening direction, and hydraulic oil is supplied from the second chamber to the first chamber when the door rotates in the closing direction. When the door is turned in the closing direction, a valve device for adjusting the flow rate of the hydraulic oil against the urging force of the spring so that the turning speed of the door does not become too fast is provided, A magnetic filter device for adsorbing metal waste is disposed in the chamber.

When the door is opened, a rotation shaft supporting the door is rotated with this operation, and the rotation of the rotation shaft drives the connecting means to move the piston. When the hydraulic oil is supplied to the second chamber and the hydraulic oil is supplied to the second chamber, the metal dust adsorbed by the hydraulic oil is adsorbed and filtered by the magnetic filter device, and when the door is released, the rotating shaft is rotated by the spring through the connecting means. Hydraulic oil is supplied from the second chamber to the first chamber while the flow rate of the hydraulic oil is adjusted by the valve device against the urging force of the spring so that the door is biased in the closing direction and the rotation speed of the door does not become too fast. You.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A floor hinge according to an embodiment of the present invention will be described below with reference to FIGS. In the drawings, components having the same functions as those of the conventional example shown in FIGS. 5 and 6 are denoted by the same reference numerals, and detailed description thereof will be omitted.

The floor hinge according to the embodiment of the present invention is provided with a rotating shaft 3 provided on the main body 1 so that an upper end protrudes from the main body 1 and supporting the door 2 at a lower portion, and a connecting means R connected to the rotating shaft 3. Pistons 10, 1 provided via
0, and a spring 14 for urging the rotating shaft 3 in the closing direction via the connecting means R, and the pistons 10, 10 can reciprocate via the connecting means R with the rotation of the rotating shaft 3. Is configured.

The connecting means R is attached to the rotating shaft 3 and has a cam plate 4 formed with another curved surface 4b, 4c near the shape of a heart from both ends of the curved surface 4a. Curved surfaces 4a, 4b, 4c of cam plate 4
Sliding plates 6 and 6 having rollers 5 and 5 that abut against each other, and rods 8 and 8 connected by two pins 7 and 7 at the other end of the sliding plates 6 and 6. The other end of each rod 8, 8 is rotatably connected to each piston 10, 10 by a pin 9, and each piston 1
Reference numerals 0 and 10 are arranged via a separation wall 1A in the main body 1.

The main body 1 includes pistons 10, 10
And is separated by a separation wall 1A into one cylinder chamber S1 and the other cylinder chamber S2. Each piston 1
Outgoing holes 31 are formed in 0 and 10, and a check valve body 32 is provided in the outgoing holes 31.

Further, a valve device 30 for adjusting the operating speed of the pistons 10, 10 when the door 2 rotates in the closing direction is provided. The valve device 30 includes the separating wall 1A and the separating wall 1A. A pair of introduction holes 32, 33 juxtaposed on the wall surface,
A return hole 34 communicating with the introduction holes 32 and 33 and having an end opened to one cylinder chamber S1 is formed.

The pistons 10, 10 slide on the wall surface of the main body 1 or the curved surfaces 4a, 4b, 4c of the cam plate 4 and the rollers 5, 5 come into contact with the other cylinder chamber S2. A magnetic filter device 41 for filtering generated metal dust is disposed in the other cylinder chamber S2.

The magnetic filter device 41 includes a disk-shaped magnet 43 attached to the other cylinder chamber S2 side of a cap 42 for sealing the main body 1, and a second cylinder chamber S2 opposed to the magnet 43. And a filter member 44 disposed inside the filter member.
And a perforated portion 47 integrally formed with the annular portion 45 and having a suction hole 46 formed on a surface thereof.

In the center of the other end of the sliding plates 6, 6 between the connecting portions with the two rods 8, 8, recesses 16, 16 are provided.
Are formed, and immediately before the door 2 closes, the recesses 16, 1
6, a pin 17 provided in the up-down direction inside the main body 1 starts to be fitted, so that the door 2 is completely closed. The tapered portions 16a, 16a are formed so as to expand toward the pins 17 so that the recesses 16, 16 can be easily fitted to the pins 17.

Therefore, when the door 2 is closed, the tapered portions 16a, 16a hit the pins 17 and the sliding plates 6, 6 are guided just before the door 2 is completely closed, and finally, the recess 1 is closed.
The sliding plates 6 and 6 are completely fitted with the pins 17 so that the sliding plates 6 and 6 are in a correct posture without inclination, and the door 2 is completely closed.

When the door 2 is closed as described above, the hydraulic oil I is supplied from one cylinder chamber S1 to the other cylinder chamber S2 through the outgoing hole 31. The spring 14
Is contracted by being pushed by the spring receiver 12.

When the user releases the door 2 that has been opened, the pistons 10, 10,
The rods 8, 8, the sliding plates 6, 6, and the rollers 5, 5 try to return to their original positions, and the cam plate 4 is pushed by the rollers 5, 5 so as to return to their original positions. I reaches the return hole 34 from the narrowed introduction holes 32 and 33, and the other cylinder chamber S
The door 2 closes while the rotation speed of the rotating shaft 3 is adjusted by adjusting the flow rate from the second to the one cylinder chamber S1.

Since the magnetic filter device 41 is disposed in the other cylinder chamber S2, if metal dust is mixed in the hydraulic oil I supplied into the other cylinder chamber S2, this metal The debris passes through the suction hole 46 and is adsorbed by the magnet 43, whereby the hydraulic oil I is filtered and introduced into the introduction holes 32 and 33.
The return hole 34 can be prevented from being clogged, and the automatic closing of the door 2 can be performed smoothly for a long time.

In the above embodiment, an example is shown in which the pistons 10, 10 and the rods 8, 8 are provided as a pair in the main body 1. However, the present invention is not limited to this.
Needless to say, the present invention can be applied to a floor hinge having a configuration in which one piston 10 and one rod 8 are provided.

[0025]

As is apparent from the above description, the present invention relates to connecting a rotating shaft for supporting a door, a piston provided via connecting means so as to reciprocate by rotation of the rotating shaft, and a rotating shaft. A spring for biasing in the closing direction via the means, wherein the main body is supplied with hydraulic oil from the first chamber separated through the piston to the second chamber when the door rotates in the opening direction. When the door turns in the closing direction, the operating oil is supplied from the second chamber to the first chamber, and when the door turns in the closing direction, the turning speed of the door does not become too fast. A valve device for adjusting the flow rate of hydraulic oil against the urging force of the spring is provided, and a magnetic filter device for adsorbing metal debris is disposed in the second chamber. Metal debris in the hydraulic oil supplied into the second chamber by the operation of each part accompanying the rotation of the If you were contaminated, the metal debris, so is adsorbed by the magnetic filter device can long term smoothly perform automatic closing of the door.

[Brief description of the drawings]

FIG. 1 is a horizontal sectional view of a floor hinge according to an embodiment of the present invention when a door is closed.

FIG. 2 is a horizontal sectional view of the floor hinge when the door is opened.

FIG. 3 is a vertical sectional view of the floor hinge when the door is closed.

FIG. 4 is a perspective view of the magnetic filter device.

FIG. 5 is a horizontal sectional view of a floor hinge showing a conventional example when a door is closed.

FIG. 6 is a horizontal sectional view of the floor hinge when the door is opened.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Main body 1A ... Separation wall 2 ... Door 3 ... Rotating shaft 4 ... Cam plate 5 ... Roller 6 ... Sliding plate 8 ... Rod 10 ... Piston 14.・ Spring 30 ・ ・ Valve device 31 ・ ・ Outgoing hole 41 ・ ・ Magnetic filter device 42 ・ ・ Cap 43 ・ ・ Disc-shaped magnet 44 ・ ・ Filter member 45 ・ ・ Circular portion 46 ・ ・ Suction hole 47 ・ Yes Hole R: Connecting means S1 One cylinder chamber S2 Other cylinder chamber

Claims (1)

[Claims] A rotary shaft provided on the main body such that an upper end protrudes from the main body and supporting the door at a lower portion; a piston provided via connecting means so as to reciprocate by rotation of the rotary shaft; A spring for biasing the rotating shaft in the closing direction via the connecting means, wherein the main body comprises:
The first chamber and the second chamber are separated via a piston, and when the door rotates in the opening direction, hydraulic oil is supplied from the first chamber to the second chamber, and when the door rotates in the closing direction. The hydraulic oil is supplied from the second chamber to the first chamber, and when the door turns in the closing direction, it operates against the urging force of the spring so that the turning speed of the door does not become too fast. A floor hinge, wherein a valve device for adjusting a flow rate of oil is provided, and a magnetic filter device for adsorbing metal chips is disposed in the second chamber.