JP3417881B2 - Return bias type hinge - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a return bias type hinge used for a normally closed door. 2. Description of the Related Art It is desirable that a door of an emergency telephone booth on a highway be automatically returned to a closed state after a telephone call is terminated and held in a closed position. As a method of automatically returning a door to a closed position, there is a method in which a functional component that generates a restoring force such as a small gas damper is incorporated in an opening / closing stay device at an upper portion of the door. However, in a system incorporating a gas damper, the assembling process is complicated, the entire device becomes large, and the parts cost increases. There is also a method in which a coil spring is fitted on a shaft pin of a hinge, and one linear end of the coil spring abuts on the rotating blade of the hinge and the other linear end abuts on the fixed blade. In some cases, the doors could not be sealed due to the fatigue deterioration of the springs. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a return-biased hinge which simplifies the assembly process, reduces component costs, and is resistant to fatigue deterioration due to repeated use. That is. [0005] Hereinafter, a description will be given with reference to the reference numerals in the accompanying drawings. A return biasing type hinge according to the present invention includes a pair of fixed hinges fixed to the front side of a fixed frame 14. A pair of rotating blades 5, 6 fixed to the rear side of the door 15 and the door 15 and rotatably connected to the fixed blades 1, 2 by a pair of shaft pins 3, 4; Front of fixed frame 14
And between the back of the door 15 and one fixed side vane 1
Fixed holder tube 7, front surface of fixed frame body 14 and door 15
It is arranged to face the holder tube 7 between the back of the holder tube 8 which is fixed on one of the rotation-side vane 6 is inserted to both ends in the holder cylinder 7,8, bent portion 10 , 11 comprise a torsion bar 9 which engages with the rotation restraining portions 12, 13 of the holder cylinders 7, 8 ;
When the door 15 is in the closed state on the peripheral walls of the holder cylinders 7 and 8
And is formed in a groove shape at a portion facing the rear surface of the door 15.
Have . In a typical example of the use of the return-biased hinge constructed as described above, a pair of fixed-side wing plates 1 and 2 are vertically arranged to face each other and a front frame of a fixed frame 14 such as a telephone box.
And a pair of rotating blades 5, 6 are vertically arranged opposite to each other and housed in a space on the rear side of the door 15,
To be fixed. Thus, the rotating blades 5 and 6 are supported by the fixed blades 1 and 2. When the door 15 is in the closed state, the torsion bar 9 is given an initial torsional deformation, and the door 15 is urged to rotate in the closing direction by the elastic restoring force of the torsion bar 9 and is kept in a closed state. I have. When the door 15 is rotated in the opening direction about the pair of shaft pins 3 and 4, the one end of the fixed blade 1 fixed to the holder cylinder 7 is turned. 6, the torsion bar 9 is twisted and deformed, and the other end of the torsion bar 9 is locked.
With the rotation of 5, the amount of torsional deformation of the torsion bar 9 increases. After the door 15 is opened to the required angle, the door 15 is stopped and held at the open position by the shoulder of the telephone user. After the telephone call, when the telephone user retreats from the telephone box and the telephone user's shoulder is separated from the door 15, the telephone user is urged to rotate in the closing direction by the elastic restoring force of the torsion bar 9, and is again kept in the sealed state. You. In the illustrated embodiment, a pair of upper and lower fixed blades 1 and 2 and rotating blades 5 and 6 are both made of an angle material. One shaft pin 3 is inserted into the through hole 16 of the horizontal plate portion 5a of the upper rotating side blade 5, and the head 3a is fixed to the horizontal plate portion 5a by welding.
The other shaft pin 4 is inserted into the through hole 17 of the horizontal plate portion 2a of the lower fixed-side wing plate 2, and the head 4a is attached to the horizontal plate portion 2a.
It is fixed by welding. The vertical plate portions 1b and 2b of the fixed-side blades 1 and 2 have insertion holes 20 and 2 for fixing screws 18 and 19, respectively.
1 is provided. The fixed blades 1 and 2 are fixed to the screws 18 and 19 respectively.
Is inserted into the receiving hole 22 of the fixed frame 14, and the nut 23 is tightened to be fixed to the fixed frame 14. [0009] The horizontal plate portion 1a of the upper fixed side blade 1
Is provided with a shaft hole 24 for inserting the shaft pin 3, and the horizontal plate portion 5 a of the rotating blade 5 is placed on the horizontal plate portion 1 a of the fixed blade 1 via a washer 25. The lower horizontal plate portion 6a of the rotary wing plate 6 is provided with a shaft hole 26 for inserting the shaft pin 4, and the horizontal plate portion 6a of the rotary wing plate 6 is fixed to the fixed side blade 2 via a washer 27. Horizontal plate part 2a
It is placed on. Vertical plate portion 5 of rotating side wing plates 5, 6
Insert holes 28 for fixing screws 29 are provided in b and 6b. The rotating blades 5 and 6 insert the screw 29 into the receiving hole 30 of the door 15.
Into the door 1 by tightening the nut 31.
5 is fixed. [0010] The horizontal plate portion 1a of the upper fixed-side vane plate 1
A holder cylinder 7 is welded and fixed to the lower surface of the shaft pin 3, and a lower end of the shaft pin 3 is inserted into an upper part of the holder cylinder 7. On the peripheral wall portion of the holder cylinder 7, there is formed a vertical groove-shaped rotation restraining portion 12, which is engaged with the L-shaped bent portion 10 on the upper side of the torsion bar 9. A holder tube 8 is welded and fixed to the upper surface of the horizontal plate portion 6a of the lower rotating blade plate 6, and an upper end of the shaft pin 4 is inserted into a lower portion of the holder tube 8. On the peripheral wall portion of the holder cylinder 8, there is formed a vertical groove-shaped rotation restraining portion 13, into which the L-shaped bent portion 11 on the lower side of the torsion bar 9 is engaged. On the back side of the door 15, a sealing rubber
Is fixed. As described above, the return biasing type hinge according to the present invention comprises a pair of fixed blades 1 and 2 and a pair of shaft pins 3 and 4.
A pair of rotating blades 5 and 6 connected to the fixed blades 1 and 2, and a torsion bar 9 inserted between one fixed blade 1 and one rotating blade 6. 9 inserts the respective ends into the holder tube 7 of the fixed-side blade 1 and the holder tube 8 of the rotating-side blade 5, and engages the bent portions 10 and 11 with the rotation stoppers 12 and 13 of the holder tubes 7 and 8. Therefore, the assembling process is simplified and the cost of parts can be reduced as compared with the gas damper type stay device. The return biasing action is given by the torsional deformation of the torsion bar 9. Since the torsion bar 9 is more resistant to fatigue deterioration due to repeated use than the coil spring type torsion spring, it has excellent durability. This makes it possible to easily obtain the return biasing hinge, and to securely hold the door in a closed state when not in use.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a return bias type hinge according to an embodiment of the present invention. FIG. 2 is a plan view of the hinge. FIG. 3 is a bottom view of the hinge. FIG. 4 is a left side view of the hinge. FIG. 5 is a sectional view taken along line AA of FIG. 1; FIG. 6 is a horizontal sectional view showing a use state of the hinge, in which a door is in a closed position. FIG. 7 is a horizontal cross-sectional view of the hinge, with the door in an open position. [Description of Signs] 1 Fixed-side wing plate 2 Fixed-side wing plate 3 Shaft pin 4 Axis pin 5 Rotating-side wing plate 6 Rotating-side wing plate 7 Holder cylinder 8 Holder cylinder 9 Torsion bar 10 Bend section 11 Bend section 12 Rotation stop section 13 Rotation stop

Claims (1)

(57) Claims 1. A pair of fixed-side wing plates 1, 2 fixed to the front side of the fixed frame body 14, and a pair of fixed wing plates 1, 2 fixed to the back side of the door 15 . A pair of rotating blades 5, 6 rotatably connected to the fixed blades 1, 2 by the shaft pins 3, 4 ;
14 between the front of the door and the back of the door 15
The holder cylinder 7 fixed to the side blade 1 and the fixed frame 14
Between the surface and the back of the door 15 so as to face the holder cylinder 7
Is a holder tube 8 which is fixed on one of the rotation-side vane 6,
Both ends are inserted into holder cylinders 7 and 8 and bent sections 10 and
11 comprises a torsion bar 9 which engages with the rotation restraining portions 12 and 13 of the holder cylinders 7 and 8 ;
13 is a peripheral wall of the holder cylinders 7 and 8 and the door 15 is closed.
In the state, in the part facing the back of the door 15,
Formed return biased hinge.