JPH10339066A - Spring hinge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain a proper closing force even in the case of a different door size by making spring tension adjustable, regarding a spring hinge having the capability of energizing a door along a closing direction. SOLUTION: This hinge has a torsion spring 7 and one spring arm 20 thereof is hooked to a spring shoe 22. This spring shoe 22 is formed to be capable of sliding and reciprocating on a hinge main wall 9. Furthermore, the second screw 26 made of a machine screw is passed through the hinge main wall 9 and threaded into a tapped hole (first thread) on the spring shoe 22. When the second screw 26 is turned, the spring shoe 2 is slidably displaced in the longitudinal direction, and the spring arm 20 correspondingly tilts longitudinally, thereby enabling the tension of the spring 7 to be changed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring hinge provided with a spring which closes a door and urges itself to swing. This hinge is applied to a swinging door that opens and closes a pipe space or a meter space of an apartment house or various inspection ports.

[0002]

2. Description of the Related Art A spring hinge includes a fixed hinge plate screwed to an opening frame side, a movable hinge plate screwed to an inner surface of a side end of a door, a hinge pin connecting both hinge plates, and an outer fitting to the hinge pin. It is comprised of a torsion coil type spring that is mounted and biases the movable hinge plate. Both hinge plates are each made of a press-formed product.

[0003]

The size of the opening surface of a pipe space or the like varies. Therefore, the size and weight of the door also vary in various ways. On the other hand, since the tension of the spring that rotationally biases the movable hinge plate is constant, doors of different sizes cannot be properly closed and biased with only one type of spring hinge. In many cases, the closing force acting on the door is optimized by increasing or decreasing the number of hinges applied to the door, or by properly using a plurality of types of hinges having different load weights (spring tensions).

As described above, when the total tension of the spring is changed by changing the number of hinges to be applied, only a total tension of an integral multiple of the basic spring tension can be obtained, and the closing force of the door is delicate. It cannot be changed. Therefore, it is not possible to sufficiently cope with a case where the change width of the door size is large. In such a case, if some hinges having different spring tensions are prepared, the door closing force can be finely changed to some extent. However, as the types of hinges increase,
The manufacturing cost of each hinge is high, and inventory management is complicated.

An object of the present invention is to change the tension of a spring for urging the movable hinge plate to some extent. Therefore, by changing the number of hinges applied and changing the spring tension, the closing force of the door can be reduced. It is to provide a spring hinge that can be finely adjusted. Another object of the present invention is to provide a spring hinge that can adjust the spring tension while the door is suspended, so that the closing force of the door can be easily adjusted not only during construction but also after construction. It is in.

[0006]

A spring hinge according to the present invention comprises a fixed hinge plate 4 fixed to an opening frame 2 as shown in FIG. A movable hinge plate 5 is provided, and a torsion coil-shaped spring 7 is disposed between the hinge plates 4 and 5 and biases the movable hinge plate 5 in the door closing direction. The fixed hinge plate 4 has a hinge main wall 9 having a U-shaped cross section, and a boss 10 that supports the hinge pin 6 is formed at one end of the hinge main wall 9 and a mounting base 11 is formed integrally at the other end. is there. A spring receiver 22 for receiving one spring arm 20 of the spring 7 is provided inside the hinge main wall 9. Hinge main wall 9
An adjusting screw 23 for adjusting the tension of the spring 7 by moving the spring support 22 is provided between the spring support 22 and the spring support 22.

More specifically, a spring receiver 22 having a U-shaped cross section is provided.
Only the slide is freely guided and supported along one inner wall of the hinge main wall 9. First screw 25 provided on spring receiver 22
And a second screw 26 that engages with the first screw 25 to slide the spring receiver 22 to form the adjusting screw 23. Second
The operation part 27 of the screw 26 is exposed on the outer surface of the hinge main wall 9 facing the inner surface of the opening frame 2.

As shown in FIG. 6, the spring support 22 includes an arm 32 pivotally supported by the hinge pin 6 and an arm 3
The first screw 25 provided on the pin 33 and the second screw 26 that engages with the first screw 25 to swing the arm 32 and adjust the screw 23. And the operation unit 27 of the second screw 26 is
Can be exposed on the outer surface of the hinge main wall 9 facing the inner surface of the hinge.

[0009]

When the spring screw 22 is moved and urged by the adjusting screw 23,
The spring arm 20 accompanies the spring receiver 22, and the tension of the spring 7 can be changed and adjusted by an amount corresponding to the displacement amount. Since the door 1 is always supported by two or more hinges, the closing force of the door 1 can be finely adjusted by adjusting the tension of the spring 7 of each hinge. Further, since the spring hinge of the present invention can have a certain width in the burden weight, even when preparing a plurality of types of spring hinges having different burden weights in order to cope with a change in door size, the kind is not limited. Can be reduced.

The adjusting screw 23 is constituted by the first screw 25 provided on the spring receiver 22 and the second screw 26 meshing with the first screw 25, and the operating part 27 of the second screw 26 is exposed on the outer surface of the hinge main wall 9. In this case, the operation of adjusting the second screw 26 can be performed very simply by opening the door 1. When the spring support 22 is formed to have a U-shaped cross section and is guided and supported using the hinge main wall 9 so that only the slide is possible, the number of components for adjusting the tension of the spring 7 can be minimized.

[0011]

【Example】

(Embodiment 1) FIGS. 1 to 4 show an embodiment of a spring hinge according to the present invention. In FIG. 2, reference numeral 1 denotes a steel door that opens and closes an opening surface of a pipe space.
The door 1 is swingably opened and closed by two spring hinges with respect to a steel opening frame 2. 3 is a flat handle lock.

In FIG. 3, a spring hinge comprises a fixed hinge plate 4 fixed to the opening frame 2 side, a movable hinge plate 5 fixed to the inner surface of the side end of the door 1, and both hinge plates 4.5. It comprises a hinge pin 6 movably connected, a torsion coil type spring 7 for urging the movable hinge plate 5 to rotate in the door closing direction, and an adjusting mechanism for adjusting the tension of the spring 7.

The fixed hinge plate 4 has a vertically long U-shaped frame-shaped hinge main wall 9, and a short cylindrical boss portion 10 which supports the hinge pin 6 at one end of the hinge main wall 9. It consists of a press-formed product that is bent and formed with the mounting base 11 bent at a right angle at the other end. Screw insertion holes 12 are provided at two locations above and below the mounting base 11.

The movable hinge plate 5 has a strip-shaped base wall 13 having the same vertical length as the hinge main wall 9, and leg pieces 14 are bent at right angles above and below one vertical edge of the base wall 13. It is made of a press-formed product in which a short cylindrical boss portion 15 that supports the hinge pin 6 is bent and formed integrally near the upper and lower ends of the side edge. Screw holes 16 are provided at two places above and below the base wall 13,
Further, an escape groove 17 is provided near the lower screw hole 16 to avoid contact interference with the spring arm 20.

The spring 7 is formed by extending spring arms 19 and 20 tangentially from the upper end and the lower end of the coil portion, respectively, so that a pair of spring arms 19 and 20 exerts tension in a direction away from each other. An open torsion coil spring is used. At the protruding end of the lower spring arm 20, a hook 21 is bent at a right angle.

As shown in FIG. 4, the movable hinge plate 5 is interposed between the upper and lower boss portions 10 of the fixed hinge plate 4 via flat washers.
In the state where the coil portion of the spring 7 is inserted between the boss portions 15 of the latter via a flat washer,
The hinge pins 6 are inserted through the bosses 10 and 15, the coil portion of the spring 7, and the four flat washers, and the lower ends thereof are swaged to connect the hinge plates 4 and 5 so that they can be relatively rotated. I do.

To adjust the tension of the spring 7, the hinge main wall 9 is used.
The spring receiver 22 is arranged inside the bracket, and can be slid forward and backward by the adjusting screw 23. The spring support 22 is formed of a press fitting having a U-shaped cross section as shown in FIG. A first screw 25 having a screw hole is provided in the portion.

The first screw 25 and the second screw 26 screwed into the first screw 25 constitute an adjusting screw 23.
The second screw 26 is a commercially available screw, and is screwed into the spring receiver 22 through a screw insertion hole 9 a provided in the back wall of the hinge main wall 9. In the assembled state shown in FIG.
Is in contact with the inner surface of the side wall of the hinge main wall 9,
Guided and supported slidably back and forth. As described above, the spring arm 20 exerts tension in the counterclockwise direction in FIG. Therefore, the second screw 26 is always pulled toward the door outer surface side, and the operation portion 27 at the inner end thereof is in close contact with the outer surface of the back wall of the hinge main wall 9.

As shown in FIG. 1, the spring hinge having the above-mentioned structure is screwed from the outer surface of the door 1 with the screw 29 screwed from the outer surface of the door 1 with the base wall 13 of the movable hinge plate 5 abutting the inner surface of the side wall of the door 1. Fix it. At this time, the leg piece 14 comes into contact with the folded wall 1a continuous with the inner end of the side wall of the door 1 to position and hold the base wall 13. After the three spring hinges are mounted on the door 1, the fixed hinge plate 4 is rotated against the tension of the spring 7, and the screws 30 inserted through the mounting base 11 are screwed into the opening frame 2, and 1
1 is fastened and fixed. Similarly, another spring hinge is attached to the opening frame 2.

When the door 1 is closed, the upper spring arm 19 comes into contact with the base wall 13 of the movable hinge plate 5 to exert a clockwise tension. Therefore, when the operator releases the hand after opening the door 1, the door 1 is automatically closed,
Keep closed. The door closing force at this time can be increased or decreased by adjusting the second screw 26. For example, in order to reduce the closing force, the operating portion 27 of the second screw 26 is turned by a screwdriver or the like in the screw loosening direction to slide the spring arm 20 toward the front wall of the hinge main wall 9, and The arm 20 is tilted forward. At this time, in order to prevent the spring receiver 22 from rotating together with the second screw 26,
Is received by the side wall of the hinge main wall 9.
When the second screw 26 is turned in the opposite direction, the spring arm 20 is tilted rearward to tighten the coil.

(Embodiment 2) FIG. 5 shows Embodiment 2 in which the arrangement of the adjusting mechanism is changed. There, the spring receiver 22 is slid left and right along the back wall of the hinge main wall 9. Then, the second screw 26 is inserted from the side of the side wall of the hinge main wall 9 so that the spring receiver 22 can be slid left and right. In this case, a first screw 25 that engages with the second screw 26 is provided on the hinge main wall 9, and the shaft end of the second screw 26 is connected to the spring receiver 22 so as to be relatively rotatable. Further, the spring 7 is configured as a tight-wound spring that exerts tension in the direction in which the upper and lower spring arms 19 and 20 intersect. Other points are the same as those in the first embodiment, and the description is omitted.

(Embodiment 3) FIG. 6 shows a spring support 2 of the adjusting mechanism.
A third embodiment is shown in which No. 2 is changed from a slide type to a swing type.
The spring receiver 22 includes an arm 32 swingably supported by a hinge pin 6 and a pin 33 rotatably connected to a tip of the arm 32. The swing base end of the arm 32 is
The lower spring arm 20 and the boss 1 below the movable hinge plate 5
And 5 between them. The pin 33 has a first threaded hole.
A screw 25 is formed, into which the thread portion of the second screw 26 is screwed. In order to absorb a change in the center position of the pin 33 due to the swing of the arm 32, the screw insertion hole 9a is formed in a long hole shape.

In addition to the above embodiment, the movable hinge plate 5
Rotational urging can be performed by more than one spring 7. In this case, the spring arms of the vertically adjacent springs 7 are connected to one spring receiver 22.
And the tension of both springs 7 can be adjusted simultaneously. The structure and form of the movable hinge plate 4 are not particularly limited, since the movable hinge plate 4 can take forms other than the embodiment. A screw shaft is fixed to the spring support 22 to form a first screw 25,
The nut that engages with the second screw 26 is used as the adjusting screw 2
3 can be configured.

[0024]

According to the spring hinge of the present invention, the tension of the spring 7 can be changed to a large or small value and the closing force of the door 1 can be adjusted only by adjusting the adjusting screw 23. Thus, the closing force of the door 1 can be finely adjusted, and the applicable range of the spring hinge can be expanded. Even when a series of multiple types of spring hinges with different burden weights are to be
The number of types can be reduced as much as possible to reduce the production cost and at the same time facilitate inventory management. According to the spring hinge in which the operation portion 27 of the second screw 26 is exposed on the outer surface of the hinge main wall 9, the tension of the spring 7 can be easily adjusted only by opening the door 1, so that the door 1 can be easily formed even after construction. This is advantageous in that the closing force of the can be adjusted and maintenance can be easily performed.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line AA in FIG.

FIG. 2 is a front view showing an application example of a spring hinge.

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

FIG. 4 is a front view of a spring hinge.

FIG. 5 is a cross-sectional plan view of a spring hinge according to the second embodiment.

FIG. 6 is a cross-sectional plan view of a spring hinge according to a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door 2 Opening frame 4 Fixed hinge plate 5 Movable hinge plate 6 Hinge pin 7 Spring 9 Hinge main wall 20 Spring arm 22 Spring support 23 Adjustment screw 25 1st screw 26 2nd screw

Claims (3)

[Claims] A fixed hinge plate fixed to an opening frame.
A movable hinge plate 5 swingably connected to a fixed hinge plate 4 via a hinge pin 6;
And a torsion coil spring 7 for urging the movable hinge plate 5 to rotate in the door closing direction. The fixed hinge plate 4 has a U-shaped cross section. Boss portion 1 having hinge main wall 9 and supporting hinge pin 6 at one end of hinge main wall 9
0, an attachment base 11 is integrally formed at the other end, and a spring receiver 22 for receiving one spring arm 20 of the spring 7 is provided inside the hinge main wall 9. A spring hinge provided with an adjusting screw 23 for moving the spring receiver 22 to adjust the tension of the spring 7 between the spring hinge 22 and the spring hinge. 2. A spring receiver 22 having a U-shaped cross section is guided and supported so as to be slidable only along one inner wall of the hinge main wall 9, and a first screw 25 provided on the spring receiver 22; An adjusting screw 23 is constituted by a second screw 26 which engages with the 1 screw 25 to slide the spring receiver 22, and an operation portion 27 of the second screw 26 is provided on the hinge main wall 9 facing the inner surface of the opening frame 2. The spring hinge according to claim 1, which is exposed on an outer surface. 3. The spring support 22 includes an arm 32 pivotally supported by a hinge pin 6 and a pin 33 rotatably connected to a tip of the arm 32. A first screw provided on the pin 33 is provided. An adjusting screw 23 is configured by a second screw 26 that meshes with the first screw 25 and swings the arm 32, and an operating portion 27 of the second screw 26 is a hinge facing the inner surface of the opening frame 2. The spring hinge according to claim 1, which is exposed on an outer surface of the main wall.