JPH07197726A - Door hinge - Google Patents

Abstract

PURPOSE:To reduce working coat of hinge bodies and eliminate poor operation of a lock tool by improving construction and arrangement of a lock tool and stoppers, in a door hinge in which the opening motion of a door can be regulated on the half opened position and two hinge shafts are provided. CONSTITUTION:A first hinge body 4 and a second hinge body 5 are connected together through a first shaft 7. The second hinge body 5 and a third hinge body 6 are connected together through a second shaft 8. The shaft hole 17 of the first shaft 7 is communicated to the shaft hole 18 of the second shaft 8 through a guide hole 21. A lock tool 22 composed of three steel balls 22a is charged in the guide hole 21. A first recessed part 27 engaging with the ball 22a is on the first shaft 7, a second recessed part 28 is on the second shaft 8, respectively provided. The phase positions of both recessed parts 27,28 are relatively shifted by 90 degrees. A stoppr 20 regulating the opening motion of a door 3 on the half opened position is provided on the outer face of the second hinge body 5. A stopper 32 prescribing the full opened position is projectingly provided on the outer face of the third hinge body 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door hinge capable of temporarily restricting the opening operation of a door in a half-open position and selecting a door opening amount in two steps of a half-open position and a fully-open position.

[0002]

2. Description of the Related Art Door hinges of this type are known as 3-121
It is known in Japanese Patent Publication No. 38-38. This door hinge is a pivot type hinge having two hinge shafts, has three hinge plates that are vertically stacked, and a second hinge plate sandwiched between the first and third hinge plates is a first hinge plate. The third hinge plate can rotate 90 degrees around the axis, and the third hinge plate can rotate 90 degrees around the second axis. A lock tool for opening and closing the second hinge plate and the third hinge plate in the described order is incorporated in the second hinge plate so as to be vertically movable. The locking member engages with either the first hinge plate or the third hinge plate. Between the first and second hinge plates and between the second and third hinge plates, the second
-A stopper formed of a pair of an arc groove and a pin for restricting the opening amount of the third hinge plate in 90 degree increments is provided. Actual Kaihei 2
-11983, Japanese Utility Model Publication No. 1-138080,
Japanese Utility Model Laid-Open No. 63-76177 also discloses a door hinge of the same type.

[0003]

In the above conventional door hinge, the lock tool and the stopper are provided between the upper and lower facing surfaces of each hinge body. Therefore, although the lock tool and the stopper are not exposed to the outer surface and the appearance of the door hinge can be improved, the number of man-hours for processing each hinge plate is large and the manufacturing cost of the door hinge is high as a whole. In the fully opened state, since the recessed portion that engages with the locking tool is exposed on the upper surface of the third hinge plate, foreign matter may enter the recessed portion, and if the door is closed while the foreign matter remains in the recessed portion, the door is closed. , The lock pin is stuck and the door cannot be closed anymore.

An object of the present invention is to provide a door hinge having two hinge shafts and capable of selecting a door opening amount in two steps of a half open position and a fully open position. Another object of the present invention is to obtain a door hinge that requires less processing steps and can be manufactured at a lower cost. Still another object of the present invention is to
The object is to obtain a highly reliable door hinge that can always open and close the door without any room for malfunction of the lock tool due to the entry of foreign matter.

[0005]

The door hinge of the present invention comprises:
It has first, second and third hinge bodies 4, 5 and 6 which are vertically overlapped, and both the first and second hinge bodies 4 and 5 are the first shaft 7 and the second
The third hinge bodies 5 and 6 are connected by the second shaft 8 so as to be rotatable relative to each other. Shaft hole 17 of first shaft 7 and second shaft 8
Is connected to the shaft hole 18 of the guide hole 21 and the guide hole 2
A lock member 22 that selectively engages with either one of the first shaft 7 and the second shaft 8 is installed in the unit 1. The opening amount of the second and third hinge bodies 5 and 6 is provided on the outer surfaces between the first hinge body 4 and the second hinge body 5 and between the second hinge body 5 and the third hinge body 6, respectively. The stoppers 20 and 32 that regulate the above are provided. At the half-open position defined by the one stopper 20, the first recess 27 and the second recess 27 that engage with the lock 22 are provided.
Recesses 28 are provided on the opposing peripheral surfaces of the first shaft 7 and the second shaft 8. Specifically, the lock 22 is composed of a plurality of steel balls 22a, and the first recess 27 and the second recess 28 are formed.
Is formed with a hemispherical recess. The stopper 2 that abuts the outer peripheral side surface of the first hinge body 4 on the peripheral edge of the upper surface of the second hinge body 5.
0 is provided, and a stopper 32 that comes into contact with the outer peripheral side surface of the second hinge body 5 is provided on one side of the upper surface of the third hinge body 6.

[0006]

In use, the first hinge body 4 is fixed to the opening frame 2 and the third hinge body 6 is fixed to the door 3. In the door closed state, as shown in FIG. 4, the lock member 22 engages with the second recess 28 of the second shaft 8 that is connected to the second and third hinge bodies 5 and 6, and both hinge bodies 5 and 6 are engaged. Are prevented from rotating relative to each other. Therefore, the door 3 opens and moves to the half-open position when the second hinge body 5 swings around the first shaft 7. In this half open position, a stopper 20 is provided between the first and second hinge bodies 4 and 5 in order to regulate the opening amount of the door 3. Another stopper 32 regulates the opening amount of the door 3 in the fully opened position. Each stopper 20 ・
32 contacts the outer surface of each of the first, second or second, third hinge bodies 4, 5, 6 to regulate the opening amount.

In the half-open position, the lock 22 is located on the outer surface of the first recess 27, and can be moved in the guide hole 21 only in the direction in which it engages with the first recess 27. Therefore, when the door 3 is further opened, as shown in FIG. 5, the recess wall of the second recess 28 pushes out the lock 22 to release the lock engagement there, and instead, the lock 2 is released.
2 engages with the first concave portion 27 to prevent relative rotation between the second hinge body 5 and the first hinge body 4. In this way, the locking tool 22 is selectively engaged with either one of the first shaft 7 and the second shaft 8 because the second hinge body 5 and the third hinge body 5 are engaged during door closing and door opening operations. This is because both of 6 are prevented from rotating at the same time, and the prescribed sequential operations are performed.

[0008]

According to the present invention, the stoppers 20 and 32 are provided on the outer surfaces of the hinge bodies 4, 5 and 6, respectively.
The outer peripheral surfaces of the hinge bodies 4 and 5 or the second and third hinge bodies 5 and 6 are received and brought into contact with each other. Further, the locking device 22 is arranged between the first shaft 7 and the second shaft 8 so that the locking device 2
By engaging 2 with either one of both shafts 7 and 8, it is possible to select the opening amount of the door 3 in two stages of a half open position and a fully open position. Therefore, compared to conventional door hinges of this kind,
By reducing the processing man-hours of each hinge body 4, 5, and 6, the processing cost and the assembly cost can be reduced, and the door hinge can be manufactured at a low cost. Since the first recess 27 and the second recess 28 that engage with the lock 22 are formed on the first shaft 7 and the second shaft 8, there is no room for foreign matter to be caught in the recesses 27 and 28. Therefore, the malfunction of the lock 22 due to the foreign matter being caught can be eliminated, and the door 3 can be opened and closed without fail, and the reliability of the door hinge can be improved.

[0009]

1 to 6 show an embodiment of a door hinge according to the present invention. In FIG. 2, reference numeral 1 is an office cabinet, 2 is an opening frame, and 3 is a door. The door 3 is supported by a pair of door hinges H at the upper and lower ends on one side and can be opened 180 degrees from the closed position, and the opening operation can be provisionally restricted at the half open position where the opening angle becomes 90 degrees. Door hinge H
Has first, second and third hinge bodies 4, 5 and 6 which are vertically overlapped with each other, and connects the first hinge body 4 and the second hinge body 5 with the first shaft 7 to connect the second hinge body 5 to the second hinge body 5. The three hinge bodies 6 are connected by the second shaft 8. The first hinge body 4 has screws 9 on the inner surface of the upper wall of the opening frame 2.
Then, the third hinge body 6 is fixed to the door 3 with screws 10 (see FIG. 6).

In FIG. 3, the first hinge body 4 is formed by punching out a stainless steel plate material with a pressing machine, and has a support portion 12 and an abutting surface 13 at a corner of the front end of the plate surface.
A positioning step portion 14 for mounting is provided on the rear portion. A square hole 15 for connecting to the first shaft 7 is provided in the support portion 12. Reference numeral 16 is a screw hole for the screw 9. The second hinge body 5 is made of a cut product made of stainless steel, and has a shaft hole 17 for the first shaft 7 and a shaft hole 18 for the second shaft 8 formed in a vertically penetrating manner along the upper surface front edge. A shielding wall 19 is provided so as to project, and a step portion at the bent end on the former shaft hole 17 side is used as a stopper 20. The blocking wall 19 covers the front end surface of the first hinge body 4 when the door is closed, and improves the appearance (see FIG. 2).

Inside the second hinge body 5, both shaft holes 17 and
A guide hole 21 communicating with 18 is provided, and a lock tool 22 is loaded inside the guide hole 21. To make the switching operation lighter,
The lock 22 is composed of three steel balls 22a.
The guide hole 21 is formed linearly from the outer side surface of the second hinge body 5 through the one shaft hole 18 toward the other shaft hole 17. A step wall 23 for receiving and abutting a stopper 32, which will be described later, is provided at a rear edge parallel to the shielding wall 19.

The first and second shafts 7 and 8 are made of the same stainless steel component, and have a flange portion 25 and a square shaft portion 26 at the upper and lower ends,
A first concave portion 27 and a second concave portion 28, into which the balls 22a fall and are engaged, are formed in a hemispherical shape at one circumferential surface of each shaft portion. The first shaft 7 is inserted into the shaft hole 17 from the lower surface side of the second hinge body 5, and the square shaft portion 26 thereof is fitted into the square hole 15 of the first hinge body 4 and fixed by caulking. At this time,
The first recess 27 is assembled so as to face the front edge of the first hinge body 4. In the fixed state, the collar portion 25 sinks into the lower surface of the second hinge body 5 (see FIG. 6).

The third hinge body 6 is made of a press-formed product of a stainless plate material bent in an inverted L shape, and a square hole 30 for connecting the second shaft 8 is provided at one side of the upper surface wall. , Two screw holes 31 for the screws 10 are provided in the elevation wall.
The elevation wall projects to one side from the top wall, and a stopper 32 is formed above the protrusion so as to be flush with the elevation wall. After loading the lock tool 22 in the guide hole 21, the second
Insert the shaft 8 into the shaft hole 18 from the upper surface side of the second hinge body 5,
The square shaft portion 26 is fitted into the square hole 30 of the third hinge body 6 and caulked and fixed. At this time, the second recess 28 is assembled so as to face the side surface on the stopper 32 side. Similar to the first shaft 7, the collar portion 25 of the second shaft 8 in the fixed state sinks into the upper surface of the second hinge body 5.

As described above, the first and second hinge bodies 4 and 5 are connected by the first shaft 7, and the second and third hinge bodies 5 and 6 are connected by the second shaft 8.・ Guide hole 21 between 8
The lock tool 22 is enclosed inside. In the door closed state shown in FIG. 4, the lock 22 is circumscribed on the peripheral surface of the shaft portion of the first shaft 7, and the ball 22a at the left end in the drawing falls into the second recess 28 of the second shaft 8 and engages. ing. Third hinge body 6
The stopper 32 provided on the step wall 23 of the second hinge body 5
Is circumscribed. The second hinge body 5 and the third hinge body 6 that support the lower part of the door 3 are the hinge bodies 5 and 6 described above.
It is formed in a vertically symmetric relationship with.

When the door 3 is opened from the door closed state, the second and third hinge bodies 5 and 6 rotate together with the first shaft 7 as a center. This is because the lock tool 22 engages with the second recess 28 to restrict the relative rotation of the second shaft 8 and the second hinge body 5. As shown in FIG. 1, when the opening angle of the door 3 reaches 90 degrees, the stopper 2 provided on the second hinge body 5 is stopped.
0 contacts the contact surface 13 of the first hinge body 4, and restricts the second hinge body 5 from further opening and rotating. That is, the door 3 is temporarily restricted from opening and rotating in the half-open position. In this half-open position, the ball 22a at the end on the first shaft 7 side faces the first recess 27 directly.

When the amount of documents or articles to be put into or taken out of the cabinet 1 is very small, it suffices to open the door 3 to the half-open position. However, when a large amount of documents or the like is taken in or out, or when the inside of the cabinet is cleaned, the door 3 protrudes to the front of the cabinet 1, which is an obstacle.
In preparation for such a case, the door 3 can be further opened to the fully open position.

When the door 3 is opened from the above half open state, its moment acts on the lowermost ball 22a toward the drawing through the second recess 28 of the second shaft 8 and locks as shown in FIG. The entire tool 22 is pushed out by the recess wall of the second recess 28, and the locked engagement state there is released. As a result, the door 3 can be opened and rotated about the second shaft 8 to the fully open position without any trouble. Stopper 3 in the fully open position
2 contacts the step wall 23 of the second hinge body 5 to prevent the door 3 from further opening and rotating. On the other hand, the lock 22 is pushed out of the second recess 28, and at the same time, the first recess 2 is pushed out.
7 Enter and engage. In this way, by selectively switching the engagement states of the lock tool 22 and the recesses 27 and 28, the second hinge body 5 and the third hinge body 6 can be opened and rotated in order.

When the door 3 is closed, the second recess 28 is disengaged as shown in FIG. 6, so that the door 3 is centered on the second shaft 8 from the fully open position to the half open position. When the stopper 32 comes into contact with the step wall 23 after the closing and turning, the closing and turning is temporarily restricted at the half-open position. When the door 3 is further closed from this state, the lock tool 22 moves to the first position.
It is pushed out of the recess 27 and engages with the second recess 28.
Therefore, the third hinge body 6 accompanies the second hinge body 5,
The door is closed and rotated about the first shaft 7, and the door is closed as shown in FIG. Since the locking tool 22 is provided between the first shaft 7 and the second shaft 8, even when the distance between the shafts 7 and 8 is changed,
It is only necessary to change the number of balls 22a to be loaded, and it is not necessary to increase the front-rear thickness of the second hinge body 5 even if the axial distance increases.

FIG. 7 shows a modified embodiment of the lock 22.
There, a pair of left and right balls 22a and both balls 22a
Locking device 2 with compression coil type spring 22b interposed between
Configured 2. In this case, the ball 22a can be engaged with the first recess 27 at the same time when the door 3 is opened to the half-open position.

FIG. 8 shows another modification of the lock 22. This locking tool 22 is based on the locking tool 22 of FIG. 7 and has a pin-shaped transmission member 22 between a pair of balls 22a.
c is arranged. According to this lock tool 22,
At the door positions other than the half-open position, it is possible to prevent the balls 22a from coming out of the corresponding first and second recesses 27 and 28, so that the second hinge body 5 and the third hinge body 6 are opened and closed in the prescribed order. be able to. In the above embodiment, the ball 22a is the engaging element, but it is not necessary.
The locking tool 22 can be formed by one or a plurality of short shafts whose both ends are rounded in a hemispherical shape. A plurality of roller shafts can be loaded into the guide holes 21 so that the central axes thereof are parallel to the central axes of the first and second shafts 7 and 8 to form the lock 22. In this case, the guide hole 21 is formed in a quadrangular cross section, or in an arc-shaped cross section having flat walls on either side. The guide hole 21 may be inclined. The first and second recesses 27 and 28 can be formed as conical recesses or cylindrical recesses, respectively. The second hinge body 5 can be formed by a die cast molding product or a plastic molding product. The door hinge H of the present invention can be applied to various doors such as doors for furniture and office furniture and doors for buildings. The opening angle when the door 3 is half-opened can be arbitrarily set within a range from an acute angle to an obtuse angle. The opening angle when fully opened can be freely selected other than 180 degrees.

The first hinge body 4 may be mounted on the outer surface side of the opening frame 2. Further, besides being mounted on the upper and lower walls of the opening frame 2, it can be mounted on the side wall of the opening frame 2. The stopper 20 can be provided on the first hinge body 4 side. For example, a claw piece projecting to the lower surface side is provided on the plate surface of the first hinge body 4, and the claw piece receives the outer side surface of the second hinge body 5. Similarly, the second hinge body 5 can be provided with a stopper that receives and contacts the peripheral edge of the upper wall of the third hinge body 6.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of a door hinge in a half-open position.

FIG. 2 is a front view of an office cabinet to which a door hinge is applied.

FIG. 3 is an exploded perspective view of a door hinge.

4 is a cross-sectional view taken along the line AA in FIG.

FIG. 5 is a cross-sectional plan view showing a switching operation of the lock tool.

FIG. 6 is a vertical cross-sectional side view of the door hinge with the door fully opened.

FIG. 7 is a cross-sectional plan view showing a modified example of the lock tool.

FIG. 8 is a cross-sectional plan view showing still another modified example of the locking device.

[Explanation of symbols]

 3 Door 4 1st Hinge Body 5 2nd Hinge Body 6 3rd Hinge Body 7 1st Axis 8 2nd Axis 20 Stopper 21 Guide Hole 22 Lock Tool 22a Ball 27 First Recess 28 Second Recess 32 32 Stopper H Door Hinge

Claims (3)

[Claims] 1. A first, a second, and a third hinge body 4, 5, 6, which are vertically overlapped with each other, wherein both the first and the second hinge bodies 4, 5 are a first shaft 7 and a second, second hinge body. Both hinge bodies 5 and 6 of 3 are connected to each other so as to be rotatable relative to each other by the second shaft 8, and the shaft hole 17 of the first shaft 7 and the shaft hole 18 of the second shaft 8 are connected by the guide hole 21. In the guide hole 21, a lock tool 22 that selectively engages with either the first shaft 7 or the second shaft 8 is loaded, and the first hinge body 4 and the second hinge body 5 are On the outer surface of each of the second hinge body 5 and the third hinge body 6,
Stoppers 20 and 32 for restricting the opening amount of the second and third hinge bodies 5 and 6 are provided, and at the half-open position defined by one stopper 20,
First recess 27 and second recess 2 that engage with the lock 22
A door hinge 8 is provided on the opposing peripheral surfaces of the first shaft 7 and the second shaft 8. 2. A steel ball 2 having a plurality of locking members 22.
The door hinge according to claim 1, wherein the door hinge is made of 2a, and the first recess 27 and the second recess 28 are hemispherical recesses. 3. A stopper 20 is provided on the peripheral edge of the upper surface of the second hinge body 5 to contact the outer peripheral side surface of the first hinge body 4, and the second hinge body is provided on one side of the upper surface of the third hinge body 6. 3. The door hinge according to claim 1, further comprising a stopper 32 that comes into contact with the outer peripheral side surface of the door hinge 5.