JPH0448310Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a self-returning hinge in which an opened door is automatically closed.

[Prior Art] Conventionally, there is a hinge with a built-in coil spring as a technique for automatically closing an opened door (see, for example, Japanese Utility Model Publication No. 17110/1983).

[Problems to be solved by the invention] In this conventional technology, a long coil spring is inserted into the central cylindrical part of the hinge, and the door body is closed using the bias of the coil spring. However, if too much load is applied to the coil spring, the spring tends to wear out, and as a result, the elasticity of the spring weakens during long-term use, causing problems in closing the door, and because the coil spring is driven in one direction. Depending on the orientation of the door to be installed, it was a hassle to need springs for the right and left sides. In addition, since it is difficult to control the elasticity of coil springs, there is a problem in that if the force is too strong or too weak, the springs will not open and close appropriately.

The present invention was developed in light of the conventional technology, and the door body automatically closes at a reasonable speed when the hand is released from the open state, and it operates smoothly even after long-term use, and is easy to operate. The purpose is to provide a hinge that allows the door body to move in either the left or right direction.

[Means for Solving the Problem] In order to achieve the above-mentioned object, the present invention takes the following technical means. With the cam facing forward, a rectangular vertical shaft whose upper part is fixed to a support shaft inserted inside the cylindrical part of the rotary plate is inserted into the center of the upper and lower cams, and the lower cam is moved into the cylinder in conjunction with the vertical shaft. It rotates and rises and lowers within the cylindrical part, and is fixed to the lower cam and the lower end of the vertical shaft, with a push-up spring interposed between the control element, and furthermore, in the upper end of the cylindrical part of the rotary plate, and in the concave groove at the upper end of the support shaft. A cap body is attached which has an engaging protrusion formed at the lower part and is fixed to the support shaft with a set screw, and a convex part formed at the lower part of one side end of the brim of the cap body is attached to the upper left and right ends of the rotating plate cylindrical part. This is a self-returning hinge that engages with one of the notches formed in the hinge.

[Function] Fig. 1 shows a state in which the lower cam 4 is close to the upper cam 3, and at this time the door body 23 is closed.
In order for the door body to come into close contact with the receiving frame 25 as shown in Figure 7, it is preferable that the door body has elasticity up to the position shown by the imaginary line in the figure. There is some space between 3 and the push-up spring 10 has some elasticity left.

When the door body 23 is opened and the rotating plate 11 rotates, the support shaft 5 rotates together with the cap body 15, and at the same time, the vertical shaft 7 also rotates, so the lower cam 4, which is interlocked with the vertical shaft, presses the upper cam 3. In response, the push-up spring 10 contracts.

Then, when you release your hand from the opened door body 23, the lower cam 4 rotates while rising along the upper cam 3 surface and the vertical axis 7 due to the expansion action of the push-up spring 10, and rotates in conjunction with the lower cam to rotate the vertical axis. 7. Since the support shaft 5 also rotates, the rotating plate 11 rotates in the door closing direction and finally returns to the state shown in FIG.

By the way, when attaching the door body 23 to the main hinge, it is preferable that the elasticity (stretching action) of the push-up spring remains a little even when the door is in the completely closed state as described above. It is impossible to install the door body as shown in the imaginary line in the figure.

Also, unlike outdoor gates, the door body has a frame at the top and bottom, so there is a natural restriction on installation.For this reason, with this hinge, the door body 23
After the spring 10 is attached to the spring 10, the push-up spring 10 is adjusted by rotating the support shaft 5.

That is, the cap body 15 is removed in advance,
The door body 23 is attached to the rotating plate 11. In this state, the rotating plate 11 and the support shaft 5 are not interlocked, the push-up spring 10 is fully extended, and the lower cam 4 is completely aligned with the upper cam 3. Next, the cap body 15 is attached to the upper surface of the cylindrical part 12, the protrusion 17 is engaged with the support shaft concave groove 13, and the convex part 19 is cut into the notches 21, 21'.
When engaged with any of the above, the rotating plate and the support shaft can be interlocked via the cap body, but in this state, the push-up spring 1
0 is in a fully extended state, so the closed door body does not come into close contact with the receiving frame, causing a gap. Therefore, if the cap body 15 is rotated a little with the cap body 15 slightly floating, the protrusion 19 will escape from the notch, but since the protrusion 17 is still engaged with the groove 13, the support shaft 5 will rotate independently of the rotation plate. The lower cam 4 rotates because the vertical shaft 7 connected to the support shaft also rotates. As the lower cam 4 rotates, it is pressed against the upper cam 3, so that it moves down the inner surface of the cylindrical portion 12 along the vertical axis 7, and the push-up spring 10 is slightly compressed accordingly. Then, when the convex part 19 of the cap body 15 is engaged with the notch of the cylindrical part 12 at a predetermined position and fixed with the set screw 22, the rotating plate 11 is connected to the support shaft 5, and therefore comes into contact with the receiving frame 25. The door body 23 is closed in a resilient state.

[Embodiment] Reference numeral 1 denotes a fixed plate whose plate surface is fixed to a vertical frame 24, and an upper cam 3 having a brim-like upper surface is fixed to the inner upper end of a cylindrical portion 2 formed at the end. Reference numeral 4 denotes a lower cam facing the upper cam, which is slidably fitted into the inner surface of the cylindrical portion 2, and the uneven surface at the upper end corresponds to the uneven surface at the lower end of the upper cam. Reference numeral 5 denotes a support shaft having a flange-like receiving portion 6 formed at its lower end, which is disposed on the upper surface of the cylindrical portion 2, and has the upper end of a rectangular vertical shaft 7 screwed inside. The vertical shaft 7 is the upper and lower cam 3,
It is inserted into the center of the upper cam 3 and rotates on the inner surface of the upper cam 3, while interlocking with the lower cam 4. Further, a thread is cut into the lower part of the vertical shaft 7, and a control element 8 is fixed to the threaded part with a nut 9, and a push-up spring 10 is interposed between the lower cam 4 and the control element 8. Reference numeral 11 designates a rotary plate having a cylindrical portion 12, with notches 21 and 21' formed at the upper end of the cylindrical portion to sandwich the plate surface, and the plate surface is fixed to the door body 23. Reference numeral 15 denotes a cap body detachably provided on the upper end of the cylindrical part 12 of the rotating plate, in which a protrusion 17 vertically provided at the center of the lower end of the collar 18 engages with a groove 13 formed at the upper end of the support shaft 5. Tsuba 1
A convex portion 19 formed at the lower part of one side end of the cylindrical portion 8 engages with one of the notches 21 and 21' of the cylindrical portion, and a rotating tool such as a rotor (not shown) is attached to the bulge 16 formed on the upper surface of the collar. ). An insertion hole 20 is provided in the center of the cap body 15, and a threaded hole 14 formed in the center of the groove 13 of the support shaft is connected to the insertion hole 20.
When the set screw 22 is inserted from above, the cap body 15 is firmly fixed to the support shaft 5. Note that the collar 18 presses against the upper surface of the cylindrical portion 12, and the convex portion 19 is in contact with the notch 21,
21', the support shaft 5 and the rotating plate 11 are fixed to each other and interlock with each other.

If the door body 23 is to be installed now, the cap body 15 is removed so that the rotating plate 11 can be moved freely. After installing the door body, the protrusion 17 of the cap body is engaged with the groove 13 of the support shaft 5, and the convex part 19 is connected to the cylindrical part 12.
When engaged with one of the notches 21 or 21', the push-up spring 10 becomes fully extended, and the door body 23 is mounted between the vertical frame 24 and the receiving frame 25, resulting in a closed state. Even in this state, when the door body is opened, the upper and lower cams 3 and 4
The door is automatically closed by the action of the push-up spring 10, but even if the door comes into contact with the receiving frame 25, it does not have sufficient elasticity, so the door cannot be completely closed. Then, lift the cap body 15 slightly to remove the protrusion 15 from the notch 21 or 21', and remove the protrusion 17 from the bulge 16 while keeping it engaged with the groove 13.
When a rotating tool is applied to and turned, the support shaft 5 rotates, the lower cam 4 also rotates together with the vertical shaft, and the push-up spring 10 is slightly compressed. When the convex portion 19 of the cap body 15 is engaged with the other notch, the door body 23 comes into contact with the receiving frame 25 while the push-up spring remains compressed, making it possible to completely close the door without creating a gap. can. In this case, assuming that the door body is not attached, the rotating plate 11 will be located inside the fixed plate 1 due to elasticity as shown in the second figure.

[Effect of the idea] The present invention has the following unique effects.

(1) When the door is released from the open state, the door body and rotating plate are automatically closed, eliminating the need for troublesome door closing operations. At this time, unlike the conventional case, the return force of the push-up spring is not applied directly to the door body, so the return is gentle and there is no risk of danger.

(2) The compression of the push-up spring can be adjusted by simply rotating the cap body 15, and the operation does not require any effort.

(3) By engaging the convex part of the cap body with either of the notches, it can be used with either the left or right door body.

(4) The movement of each component is organic and efficient, and no concentrated load is applied to one place, so there is no risk of failure and it can operate normally over a long period of time.

(5) It looks good because it looks almost the same as a conventional hinge.

[Brief explanation of the drawing]

Fig. 1 is a partial longitudinal sectional side view of the proposed hinge, Fig. 2 is a perspective view of the entire hinge, Fig. 3 is a vertical sectional view showing the upper part of the hinge, Fig. 4 is a partial longitudinal sectional view of the spindle, 5 is a perspective view of the rotating plate, FIG. 6 is a perspective view of the cap body, and FIG. 7 is a schematic plan view showing the state in which the door body is attached. 1... Fixed plate, 2... Cylindrical part, 3... Upper cam,
4... Lower cam, 5... Support shaft, 7... Vertical shaft, 8...
Control element, 10... Push-up spring, 11... Rotating plate,
12... Cylindrical part, 13... Concave groove, 15... Cap body,
17...button, 18...tsuba, 19...convex part, 2
1, 21... Notch.

Claims (1)

[Scope of utility model registration request] The lower cam 4 faces the upper cam 3 attached to the inner upper end of the cylindrical part 2 of the fixed plate 1, and the
Support shaft 5 inserted inside the cylindrical part 12 of the rotating plate 11
The lower cam 4 rotates and moves up and down within the cylindrical part 2 in conjunction with the vertical shaft 7, and is fixed to the lower cam 4 and the lower end of the vertical shaft 7. A push-up spring 10 is interposed between the control elements 8, and a protrusion 17 is formed at the upper end of the cylindrical portion 12 of the rotating plate 11 to engage with the groove 13 at the upper end of the support shaft 5. A cap body 15 fixed with a set screw 22 is attached to the cap body 5, and a convex portion 19 formed at the bottom of one side end of the brim 18 of the cap body forms notches 21, 21 formed on the left and right of the upper end of the rotating plate cylindrical portion 12. A self-returning hinge characterized in that it engages one side of the hinge.