JP4211997B2 - Ascending / removing hinge - Google Patents

Description

The present invention is used to connect a door to a fixed frame body such as a refrigerator so as to be openable and closable, and a cam surface of a blade plate fixed to the fixed frame body side and a cam surface of a blade plate fixed to the door side The above-described interaction relates to an up-and-down insertion / removal hinge that rises to a predetermined height when the door is opened and rotated.

A first blade fixed to the fixed frame, a second blade fixed to the door, and a bottom of the first vertical shaft hole of the first blade, and a first cam surface is formed on the upper surface. A first cam body, and a second cam body that is pivotally fitted into the first vertical shaft hole of the first blade plate and has a second cam surface that contacts the first cam surface of the first cam body on the lower surface portion; The second cam body is fixed to penetrate through the center of the second cam body, the upper part is inserted and fixed in the second vertical shaft hole of the second blade, and the lower part is pivotally inserted into the first vertical shaft hole of the first cam body. An ascending / removing hinge comprising a pivot pin is already known (see Patent Document 1).

In this up-down insertion / removal hinge, the pivot pin is removed from the second vertical shaft hole of the second blade, the second blade is rotated 180 degrees in its own plane, and then the pivot pin is moved to the second blade. 2 By inserting it into the vertical shaft hole, it can be rearranged into a left-opening door specification and a right-opening door specification.
Each of the first cam surface of the cam body and the second cam surface of the second cam body is constituted by one single-flow slope, and the fitting angle of the first cam body with respect to the first blade and the second blade surface Since the fitting angle of the second cam body cannot be changed, in both the specifications for the left-opening door and the specification for the right-opening door,
The close-up operation is performed when the door is rotated from the closed position to 180 degrees, and the door cannot be stably held at the open position by rotating 90 degrees in the middle.

On the other hand, in the conventional metal hinge, every time the door is opened and closed, the end surfaces of the bearing tube portion of the first blade plate and the bearing tube portion of the second blade plate are in sliding contact with each other. Metal dust is generated by the sliding contact of the pins. When such a hinge is used in a device in a clean room of a semiconductor manufacturing factory, metal dust floats in the clean room due to a ventilation flow or the like, which seriously affects the semiconductor manufacturing quality.

As a measure against this metal dust, a first bearing tube portion is formed at the side end portion of the metal first blade plate, a second bearing tube portion is formed at the side end portion of the metal second blade plate, and the first A synthetic resin bushing is mounted in each end of the bearing cylinder part and the second bearing cylinder part, and a metal pivot pin is passed through the first bearing cylinder part and the second bearing cylinder part through the synthetic resin bush, A hinge has been developed in which the first blade plate and the second blade plate are connected so as to rotate relative to each other and the flanges formed at the end portions of the synthetic resin bushes are in contact with each other (see Patent Document 2). .

However, even in the hinge in which dust countermeasures are taken as described above, the bottom of the first bearing tube portion of the first blade is open toward the external space. From the gap formed between the peripheral surface and the outer peripheral surface of the pivot pin, the abrasion dust of the synthetic resin may leak out, which causes the air cleanliness in the clean room to deteriorate.

1992 Patent Publication No. 19394 Japanese Patent No. 2958309

An object of the present invention is to provide an up-and-down insertion / removal hinge that can change the up-motion operation in units of 90 degrees and can suppress the leakage of wear dust into the room as much as possible.

The up-and-down insertion / removal hinge of the present invention is fixed to the fixed frame 1, has a first vertical shaft hole 4 formed in a first bearing tube portion 3 at a side end portion, and a first vertical shaft hole 4 at the top. The cam receiving hole 5 is enlarged in diameter, the bottom of the first vertical shaft hole 4 is closed, and an air vent groove 23 opened to the first cam receiving hole 5 is formed on the inner surface of the first vertical shaft hole 4. A first blade 2 formed and formed with first positioning grooves 6 at intervals of 90 degrees on the inner peripheral surface of the first cam receiving hole 5;
Is fixed to the door 7, a second vertical shaft hole 10 formed in the second bushing part 9 of the side edge portion, the second cam receiver hole 11 increased in diameter is formed in the lower portion of the second vertical shaft hole 10, the upper end to form a small-diameter hole 28 communicating with the outer space of the second vertical shaft hole 19, the second positioning groove 12 formed on the inner surface at 90 ° intervals of the second cam receiver hole 11, the second bushing A second vane plate 8 provided with recombination reference lines 26, 27 in the diametrical direction on the lower end surface of the portion 9 ,
The first vertical holes 14 are formed to penetrate, the first positioning projections 15 are formed at intervals of 90 degrees on the lower outer peripheral surface, and the first cam surface 16 is formed at the upper portion where the crests and troughs repeat in a wavy manner at a period of 90 degrees. The first positioning projection 15 is fitted into the first positioning groove 6 so that the first cam receiving hole 5 of the first blade 2 is fitted.
A first cam body 13 which is fitted in a relatively non-rotatable manner,
A cylindrical portion 19 is formed in the upper portion so as to penetrate through the second vertical hole 18 and fit into the second vertical shaft hole 10 of the second blade 8, and second positioning is performed at an interval of 90 degrees on the outer peripheral surface of the intermediate portion. A protrusion 20 is formed, a second cam surface 21 having a crest and a trough that repeats in a wave shape with a period of 90 degrees is formed in the lower part, and the second positioning protrusion 20 is fitted into the second positioning groove 12 to A second cam body 17 fitted in the second cam receiving hole 11 of the two blades 8 so as not to be relatively rotatable;
A lower portion is press-fitted and fixed in the first vertical shaft hole 4 of the first blade plate 2, and an intermediate portion is the first vertical hole 14 of the first cam body 13 and the second vertical of the second cam body 17. A pivot pin 22 inserted into the hole 18 and having an upper portion inserted into the second vertical hole 18 of the second cam body 17 ;
In the closed state of the door 7, the top surface 16 of the mountain portion of the first cam surface 16 of the first cam body 13.
a is brought into contact with the bottom surface 21b of the second cam surface 21 of the second cam body 17, while the second cam body is formed on the bottom surface 16b of the first cam surface 16 of the first cam body 13. 17 second
When the mountain top surface 21a of the cam surface 21 is brought into contact with and the door 7 is opened, the first cam surface 16
The second vane plate 8 is lifted with respect to the first vane plate 2 by the interaction between the first cam plate 21 and the second cam surface 21.

In the ascending / removing hinge of the present invention , the first cam receiving hole 5 is formed with an enlarged diameter above the first vertical shaft hole 4 of the first blade 2, and the inner peripheral surface of the first cam receiving hole 5 is spaced by 90 degrees. The first positioning groove 6 is formed, and the diameter of the second cam receiving hole 11 is formed below the second vertical shaft hole 10 of the second vane plate 8.
The second positioning grooves 12 are formed on the inner surface of the first cam body 13 at intervals of 90 degrees,
The first positioning projections 15 are formed at intervals of 1 °, the first cam surface 16 is formed on the upper portion of the first cam body 13 with the crests and troughs repeating in a 90-degree cycle, and the intermediate portion of the second cam body 17 Since the second positioning projections 20 are formed on the outer peripheral surface at intervals of 90 degrees, and the second cam surface 21 is formed on the lower portion of the second cam body 17 so that the crests and troughs repeat in a wavy pattern with a period of 90 degrees. 1 cam body 13 is rotated by 90 degrees around its own vertical center axis, and then the first cam body 1 is inserted into the first positioning groove 6 of the first blade 2.
3 first positioning projections 15 are fitted, and the first cam body 13 is inserted into the first cam receiving hole 5 of the first blade 2.
While the second cam body 13 is rotated 90 around its own vertical center axis.
After rotating in degrees, the second positioning projection 20 of the second cam body 17 is fitted into the second positioning groove 12 of the second blade 8 and the second cam receiving hole 11 of the second blade 8 is fitted. By fitting the second cam body 17 so as not to be relatively rotatable, the ascending operation of the second blade 8 relative to the first blade 2 can be arbitrarily changed in units of 90 degrees.
For example, from the door closed state in which the first blade plate 2 and the second blade plate 8 are arranged on the same vertical plane, the door 7 opens 90 degrees and the second blade plate 8 is perpendicular to the first blade plate 2. When the second vane plate 8 rises to a predetermined height and is stably held when it comes to a certain position, and the first vane plate 2 and the second vane plate 8 are arranged on separate vertical planes that intersect at right angles. When the door 7 is opened 90 degrees from the door closed state and the second blade 8 comes into the vertical plane where the first blade 2 is disposed, the second blade 8 rises to a predetermined height. It can be applied to both usage forms that are maintained stably.

In the illustrated embodiment, the first blade 2, the second blade 8, and the pivot pin 22 are made of metal or synthetic resin having high mechanical strength. The first cam body 13 and the second cam body 17 are made of a synthetic resin having high wear resistance. A lower portion of the pivot pin 22 is press-fitted and fixed in the first vertical shaft hole 4 of the first blade 2. An air vent groove 23 at the time of press fitting is formed on the inner surface of the first vertical shaft hole 4, and the upper end of the air vent groove 23 communicates with the first cam hole 5.

The first blade 2 is fixed to the fixed frame 7 of the device by screws (not shown) inserted into the mounting holes 24 formed in the main body. The second blade 8 is fixed to the door 7 of the device by a screw (not shown) inserted into the mounting hole 25 formed in the main body. Recombination reference lines 26 and 27 are displayed on the lower end surface of the second bearing tube portion 9 of the second blade 8. The upper end of the second vertical shaft hole 9 of the second blade 8 is in communication with the external space through the small diameter hole 28.

In the usage mode of the hinge, the opening edge frame portion of the fixed frame 1 and the door 7 are arranged on the same vertical surface in the closed state of the door 7, and the first blade plate 2 and the second blade plate 8 are in the door closed position. When the doors 7 are on the same vertical plane (the embodiment shown in FIG. 3), when the door 7 is closed, the opening edge frame portion of the fixed frame 1 and the door 7 are arranged on different vertical planes that intersect at right angles to each other. In the closed position, the first blade plate 2 and the second blade plate 8 may be on different vertical planes that intersect each other at right angles (the embodiment shown in FIG. 6).

In the former mode, when the door 7 is opened 90 degrees, the second blade 8 is in the position shown in FIGS. 4 and 5, whereas in the latter mode, the second blade 8 is opened when the door 7 is opened 90 degrees. 8 comes to the position shown by the one-dot chain line in FIG.

The crest top surface 16 a and the trough bottom surface 16 b of the first cam surface 16 of the first cam body 13 are formed in the first vertical hole 14.
It is formed on a flat surface orthogonal to. Further, the crest top surface 21 a and the trough bottom surface 21 b of the second cam surface 21 of the second cam body 17 are formed in a horizontal plane orthogonal to the second vertical hole 18. In the door closed state, the crest top surface 16 a of the first cam surface 16 of the first cam body 13 abuts against the trough bottom surface 21 b of the second cam body 17, while the first cam surface 16 of the first cam body 13. The valley bottom surface 16 b is in contact with the peak top surface 21 a of the second cam body 17.

Four slopes connecting the peak top surface 16a and the valley bottom surface 16b of the first cam body 13, and four slopes connecting the peak top surface 21a and the valley bottom surface 21b of the second cam body 17 However, it constitutes a substantial composite cam slope.
When the door 7 is opened and rotated 90 degrees from the closed position, the crest top surface 21a of the second cam surface 21 of the second cam body 17 is formed on the crest top surface 16a of the first cam surface 16 of the first cam body 13. By abutting, the second blade 8 is raised by an amount twice the height of these peaks, and is stably held at the raised position.

When the door 7 is closed, the top 7a of the second cam surface 21 of the second cam body 17 is pushed by pushing the door 7 by hand.
Is dropped from the top surface 16a of the first cam surface 16 of the first cam body 13, the door 7 is automatically closed by the interaction of its own weight and the cam slope.

It is a front view of the extraction state of the hinge concerning one example of the present invention, and the portion of the 1st bearing cylinder part of the 1st blade is shown in the longitudinal section. It is a bottom view of the hinge of FIG. FIG. 2 is a front view of one usage of the hinge of FIG. 1 with the door in a closed position and the first and second vanes of the hinge being disposed in the same vertical plane. FIG. 3 shows a state when the door is opened up to 90 degrees from the door closed position in FIG. 3, and the first blade plate and the second blade plate of the hinge are in a vertical plane intersecting at a right angle. It is a bottom view of the hinge in the door open state of FIG. FIG. 2 is a front view of another use of the hinge of FIG. 1 with the door in a closed position and the first and second vanes of the hinge in a perpendicular plane that intersects at right angles. It is a front view of the 1st blade board of the hinge of FIG. It is a top view of the 1st blade board of FIG. It is a longitudinal cross-sectional view of the 1st blade board of FIG. It is a front view of the 2nd blade board of the hinge of FIG. It is a bottom view of the 2nd blade board of FIG. It is a longitudinal cross-sectional view of the 2nd blade board of FIG. It is a front view of the 1st cam body of the hinge of FIG. It is a top view of the 1st cam body of FIG. 13, and the parallel oblique line is given to the mountain top surface of the 1st cam surface for clarification of illustration. It is a bottom view of the 1st cam body of FIG. It is a left view of the 1st cam body of FIG. It is a front view of the 2nd cam body of the hinge of FIG. FIG. 18 is a bottom view of the second cam body of FIG. 17, and the top surface of the crest of the second cam surface is given parallel diagonal lines for clarity of illustration. It is a top view of the 2nd cam body of FIG. It is a left view of the 2nd cam body of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed frame 2 1st blade board 3 1st bearing cylinder part 4 1st vertical shaft hole 5 1st cam receiving hole 6 1st positioning groove 7 Door 8 2nd blade board 9 2nd bearing cylinder part 10 2nd vertical axis Hole 11 Second cam receiving hole 12 Second positioning groove 13 First cam body 14 First vertical hole 15 First positioning protrusion 16 First cam surface 17 Second cam body 18 Second vertical hole 19 Cylindrical portion 20 Second positioning protrusion 21 Second cam surface 22 Pivot pin 23 Air vent groove 24 Mounting hole 25 Mounting hole

Claims (1)

A first vertical shaft hole 4 is formed in the first bearing tube portion 3 at the side end, fixed to the fixed frame 1, and a first cam receiving hole 5 is formed in an enlarged diameter above the first vertical shaft hole 4. The bottom of the first vertical shaft hole 4 is closed, and an air vent groove 23 is formed on the inner surface of the first vertical shaft hole 4 so as to open to the first cam receiving hole 5 . A first blade 2 having first positioning grooves 6 formed at intervals of 90 degrees on the inner peripheral surface of 5;
Is fixed to the door 7, a second vertical shaft hole 10 formed in the second bushing part 9 of the side edge portion, the second cam receiver hole 11 increased in diameter is formed in the lower portion of the second vertical shaft hole 10, the upper end to form a small-diameter hole 28 communicating with the outer space of the second vertical shaft hole 19, the second positioning groove 12 formed on the inner surface at 90 ° intervals of the second cam receiver hole 11, the second bushing A second vane plate 8 provided with recombination reference lines 26, 27 in the diametrical direction on the lower end surface of the portion 9 ,
The first vertical holes 14 are formed to penetrate, the first positioning projections 15 are formed at intervals of 90 degrees on the lower outer peripheral surface, and the first cam surface 16 is formed at the upper portion where the crests and troughs repeat in a wavy manner at a period of 90 degrees. The first positioning projection 15 is fitted into the first positioning groove 6 so that the first cam receiving hole 5 of the first blade 2 is fitted.
A first cam body 13 which is fitted in a relatively non-rotatable manner,
A cylindrical portion 19 is formed in the upper portion so as to penetrate through the second vertical hole 18 and fit into the second vertical shaft hole 10 of the second blade 8, and second positioning is performed at an interval of 90 degrees on the outer peripheral surface of the intermediate portion. A protrusion 20 is formed, a second cam surface 21 having a crest and a trough that repeats in a wave shape with a period of 90 degrees is formed in the lower part, and the second positioning protrusion 20 is fitted into the second positioning groove 12 to A second cam body 17 fitted in the second cam receiving hole 11 of the two blades 8 so as not to be relatively rotatable;
A lower portion is press-fitted and fixed in the first vertical shaft hole 4 of the first blade plate 2, and an intermediate portion is the first vertical hole 14 of the first cam body 13 and the second vertical of the second cam body 17. A pivot pin 22 inserted into the hole 18 and having an upper portion inserted into the second vertical hole 18 of the second cam body 17 ;
In the closed state of the door 7, the top surface 16 of the mountain portion of the first cam surface 16 of the first cam body 13.
a is brought into contact with the bottom surface 21b of the second cam surface 21 of the second cam body 17, while the second cam body is formed on the bottom surface 16b of the first cam surface 16 of the first cam body 13. 17 second
When the mountain top surface 21a of the cam surface 21 is brought into contact with and the door 7 is opened, the first cam surface 16
And a second insertion / removal hinge that is configured to raise the second blade 8 with respect to the first blade 2 by the interaction of the second cam surface 21.

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