JP3356267B2 - Self-closing hinge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge used for a door of a refrigerator or the like, wherein the door is automatically closed and rotated by using a slope cam and the weight of the door.

[0002]

2. Description of the Related Art As disclosed in Japanese Patent Publication No. 52-19394, a fixed-side wing plate fixed to a fixed frame, a movable-side wing plate fixed to a door, and a bottom portion of a vertical shaft hole of the fixed-side wing plate. A fixed cam body having a cam slope formed on an upper surface thereof, and a cam follower having a cam slope formed on a lower surface thereof to be pivotally fitted into a vertical shaft hole of a fixed-side vane plate and abutting against a cam slope of the fixed cam body. And a shaft rod that is fixedly inserted through the center of the cam follower, the upper part is fixedly inserted into the vertical shaft hole of the movable blade, and the lower part is pivotally inserted into the vertical shaft hole of the fixed cam body. Such self-closing hinges are already known.

[0003] In this self-closing hinge, the cam follower can be pulled out from the vertical shaft hole of the fixed-side blade in both the closed state and the door-opened state, so that the connection between the movable-side blade and the fixed-side blade is released. Then the door can be removed from the fixed frame. However, the fact that the movable wing plate and the fixed wing plate can be disconnected even when the door is closed means that the door is fixed to the fixed frame by a door lock handle device separately provided on the side opposite to the hanging side by the hinge. This means that the door can be opened without permission even if it is firmly locked, and it is impossible to prevent theft of stored items in the fixed frame and prevent addition of harmful substances to the stored items.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a self-closing hinge that prevents the movable blade from being separated from the fixed blade when the door is closed.

[0005]

Means for Solving the Problems Hereinafter, the gist of the present invention will be described using reference numerals in the accompanying drawings.
Fixed blade body 2 fixed to the door, movable blade 4 fixed to the door 3, and fixed cam body 6 provided at the bottom of the vertical shaft hole 5 of the fixed blade 2 and having a cam slope 7 formed on the upper surface. A cam follower 8 pivotally fitted into the vertical shaft hole 5 of the fixed-side blade 2 and having a cam slope 9 formed on the lower surface thereof to abut against the cam slope 7 of the fixed cam body 6; The upper portion is fixedly inserted into the vertical shaft hole 10 of the movable side blade 4, and the lower portion is pivotally inserted into the vertical shaft hole 11 of the fixed cam body 6. In the closed type hinge, the fixed-side wing plate 2 is provided with a stop projection 13 and the movable-side wing plate 4 is provided with a stop protrusion 14. On the other hand, when the door is opened, the engagement between the locking projection 14 and the stopping projection 13 is released. It is to place the protrusion 13 and the locking protrusion 14.

[0006] As shown in FIGS. 6 and 7, when the door is closed, the locking projection 14 of the movable wing plate 4 is engaged with the stopping projection 1 of the fixed wing plate 2.
3, the movable follower plate 4 cannot be moved upward to remove the cam follower 8 from the vertical pivot 5 of the fixed-side vane plate 2. Therefore, the movable-side blade 4 cannot be separated from the fixed-side blade 2, thereby preventing the door 3 from being opened without permission due to the disassembly of the hinge.

After the door 3 is unlocked by the separately provided door lock handle device and the door 3 is rotated about the shaft 12 in the opening direction by a predetermined angle, for example, 90 degrees, the locking projection 14
The engagement between the cam follower 8 and the stopper 13 is released, and the cam follower 8 rises to the position shown in FIG. 9 while rotating by the action of the cam slope 9 of the cam follower 8 and the cam slope 7 of the fixed cam body 6. When the hand is released from the door 3 in the open position, the door 3 automatically closes and rotates due to the weight of the door 3 and the action of the cam slopes 7 and 9. With this closing rotation, the movable-side vane plate 4 descends while turning, and at the end of rotation, the locking projection 14 enters the lower side of the stopping projection 13 and engages.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, a fixed cam body 6 is manufactured separately from a fixed-side blade 2 and is fixed to the bottom of a vertical shaft hole 5 of the fixed-side blade 2 so as to be relatively non-rotatable. The fixed cam body 6 and each driven body 8 are made of a plastic material having high wear resistance. The upper part of the shaft rod 12 is fixed to the movable side blade plate 4 by a fixed screw 15 and the cam follower 8
Are integrally connected to the movable side blade 4. In addition, the fixed cam body 6 can also be formed integrally with the fixed-side blade 2,
The cam follower 8 can be formed integrally with the shaft rod 12.

In the present embodiment, the cam slope 7 of the fixed cam body 6 and the cam follower 8 are
Since the flat surface portions 7a and 9a are formed at the end of the cam slope 9, the door 3 is held at the open position when the door 3 is further rotated to a position where the flat end portion 9a rides on the flat surface portion 7a. You. When the door is closed, the door 3 is pushed by hand to drop the flat surface portion 9a from the flat surface portion 7a. This initiates automatic closing.

The fixed-side wing plate 2 is fixedly fastened to a front portion of the fixed frame 1 such as a refrigerator body by bolts passing through the through holes 16. The movable blade 4 is fastened and fixed to the end face of the door 3 by bolts passing through the through holes 17. When the door is opened, the locking projection 14 and the stopping projection 13 are not in the engagement position, so that the movable blade 4 can be separated from the fixed blade 2 as before, and the door 3 is removed from the fixed frame 1 as necessary. be able to.

[0011]

As described above, in the self-closing hinge of the present invention, the stopping projection 13 is provided on the fixed-side blade 2 and the locking projection 14 is provided on the movable-side blade 4. The locking projections 14 and the locking projections 14 are arranged so that the locking projections 14 engage with the locking projections 13 at the position, and the engagement between the locking projections 14 and the locking projections 13 is released when the door is opened. When closed, the movable-side vane plate 4 cannot be separated from the fixed-side vane plate 2, so that the stored items can be prevented from being stolen by opening the door without permission, and addition of harmful substances to the stored items can be properly prevented.

[Brief description of the drawings]

FIG. 1 is a front view showing a use state of a self-closing hinge according to one embodiment of the present invention, wherein a door is in a closed position.

FIG. 2 is a rear view of the self-closing hinge.

FIG. 3 is a plan view of the self-closing hinge.

FIG. 4 is a left side view of the self-closing hinge.

FIG. 5 is a right side view of the self-closing hinge.

FIG. 6 is a sectional view taken along line AA of FIG. 3;

FIG. 7 is a sectional view taken along line BB of FIG. 4;

FIG. 8 is a sectional view taken along line CC of FIG. 4;

FIG. 9 is a left side view of the self-closing hinge when the door is opened.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 fixed frame 2 fixed blade 3 door 4 movable blade 5 vertical shaft hole of fixed blade 6 fixed cam 7 cam slope of fixed cam 8 cam follower 9 cam slope of cam follower 10 vertical of movable blade Shaft hole 11 Vertical shaft hole of fixed cam body 12 Shaft rod 13 Suppression protrusion of fixed side blade 14 Locking protrusion of movable side blade 15 Screw for fixing shaft rod 16 Through hole for fixing fixed side blade 17 For fixing movable side blade Through hole

Claims (1)

(57) [Claims] A fixed-side vane plate fixed to a fixed frame body.
A fixed cam body 6 provided at the bottom of the vertical shaft hole 5 of the fixed-side blade 2 and having a cam slope 7 formed on the upper surface thereof; A cam follower 8 which is rotatably fitted into the shaft hole 5 and has a cam slope 9 formed on the lower surface thereof to come into contact with the cam slope 7 of the fixed cam body 6, and is fixedly provided through the center of the cam follower 8. , Movable wing plate 4
The upper portion is fixedly inserted into the vertical shaft hole 10 and the lower shaft portion is rotatably inserted into the vertical shaft hole 11 of the fixed cam body 6. A locking projection 14 is provided on the plate 4, and the locking projection 13 is provided when the door is closed.
When the locking projection 14 engages with the restraining projection 13 at the lower position, the locking projection 13 and the locking projection 14 are arranged such that the engagement between the locking projection 14 and the restraining projection 13 is released when the door is opened. Closed hinge.