JP5767768B2 - Spiral spring hinge - Google Patents

Description

  The present invention relates to a spiral spring type hinge used for an opening / closing mechanism in various fields such as industrial machines, other industrial equipment, buildings, furniture, and office machines.

  An example of a conventional hinge is shown in FIG. These hinges are connected to each other by a connecting shaft D in which a blade plate A and a blade plate B are inserted into a cylindrical connecting portion C, and one end of a coil spring E provided on the outer periphery of the connecting shaft D is one blade plate A. The other end is locked to the other wing plate B, and the wing plate A and the wing plate B are biased in the opening direction or the closing direction.

Conventional hinges using coil springs have the following problems.
(1) Since the force in the opening direction or closing direction of the blade plate concentrates on the end portion of the coil spring that is locked to the blade plate, the end portion is subjected to metal fatigue due to long-term use and the urging force is deteriorated.
(2) When the engagement end portion of the coil spring is significantly fatigued or when a strong impact force is applied to the engagement end portion, the engagement end portion may be broken. In this case, if the hinge is used in a food processing machine or the like, the broken end may be mixed into the food, which is a safety problem. If it is used for automobile parts, it may cause an accident.

The present invention relates to a hinge in which a connecting portion of two blades is connected to be openable and closable by a connecting shaft, and both blades are biased in an opening direction or a closing direction by a spring provided on the outer periphery of the connecting shaft. a rectangular plate, notches which open from either side of the front and back surfaces to the other surface side of the blade plate in the width direction inside end portions of the vanes each are formed, notch each is The blades are elongated in the longitudinal direction of the blades, and each of the blades has a cylindrical connecting portion on both outer sides in the longitudinal axis direction than the notches. Both blades are arranged so that the notches are opposed to each other. The connecting portions of the plates are arranged on the same axis, and connecting shafts are inserted into the connecting portions so as to be openable and closable, and an arrangement space is formed by both notched portions of the opposed blade plates. A spiral spring is wound around the outer periphery of a part of the axial direction of the shaft, and the spiral spring is a thin tape A spiral spring in which a plate material is wound in a spiral shape when viewed from the end, and a lower part of the spiral spring wound around the outer periphery of the connection shaft is accommodated in the arrangement space, and the spiral spring is wound inwardly in the winding direction. A thin plate-shaped inner locking portion having a full width or a partial width of the end portion is locked to the connecting shaft, and a thin plate-shaped outer engagement width having a full width or a partial width of the winding direction outer end portion of the spiral spring. A stop portion projects from the notch portion of the one blade plate under the blade plate to the outside of the blade plate, is folded back on the blade plate at the outer peripheral edge of the blade plate, and is locked to the blade plate. It is a thing.

In the spiral spring type hinge of the present invention, the inner locking portion having the full width or a partial width of the inner end portion of the spiral spring is connected to the connecting shaft, and the outer locking portion having the full width or a partial width of the outer end portion is one side. Since it is locked to the blade, the following effects are obtained.
(1) Since the widths of the inner locking portion and the outer locking portion are widened, the load applied to the locking portions is dispersed, and the locking portions are less likely to be subjected to metal fatigue, and the urging force of the spiral spring to the blade plate Is ensured for a long time and durability is improved.
(2) There is no possibility that the locking portion is broken, and even if it is broken, both locking portions are fixed, so that they do not fall into the food. For this reason, even if it is used in a food machine, there is no fear of being mixed into food, and even if it is used in an automobile or the like, there is no possibility of contributing to traffic matters.

(Embodiment 1)
An example of the embodiment of the hinge of the present invention will be described with reference to FIG. In the hinge of this embodiment, as shown in FIG. 1, cylindrical connecting portions 3 and 4 of two blades 1 and 2 are arranged on the same axis, and a connecting shaft 6 is provided in the connecting portions 3 and 4. The blade plate 1 and the blade plate 2 are connected so as to be openable and closable. In this case, the spiral spring 7 wound around the outer periphery of the connecting shaft 6 is arranged in the arrangement space 8 between the two blades 1 and 2 and the connecting portions 3 and 4.

The wing plates 1 and 2 are provided with two cylindrical connecting portions 3 and 4 into which the connecting shaft 6 can be inserted, similarly to the existing hinges. Further, on the inner surface of each of the vanes 1, 2 are formed cutout portions 9 and 10, when the opposed cut-away portion 9, 10 of the wings plates 1, the notch 9, 10 An arrangement space 8 in which the spiral spring 7 can be arranged is formed therebetween.

  The connecting shaft 6 has a thickness that can be inserted into the cylindrical connecting portions 3 and 4, and has a length that can be inserted up to the outer connecting portions 3.

  The spiral spring 7 is obtained by winding a single plate material in a spiral shape, and latches a locking portion (inner locking portion) 11 at an inner end portion in the winding direction with the connecting shaft 3, and ends the outer end in the winding direction. The locking portion (outer locking portion) 12 is locked to one blade. The illustrated spiral spring 7 has a width W narrower than the length of the arrangement space 8 in order to facilitate understanding of the wound state and the locked state, but the width W, diameter, number of turns, plate thickness, etc. of the spiral spring 7 are used. And can be selected according to the required urging force. The width W of the inner locking portion 11 and the outer locking portion 12 can be the width of all or part of the width W of the inner end portion and the outer end portion of the spiral spring 7. The locking means of the inner locking portion 11 and the outer locking portion 12 is not particularly limited, but at least the inner locking portion 11 is locked so as not to be detached from the connecting shaft 6 when the connecting shaft 6 is rotated. The part 12 does not come off from the blades 1 and 2 when the blades 1 and 2 are opened and closed, and does not prevent the blades 1 and 2 from being opened and closed.

  The hinge of the present invention can be used in a field similar to the field of use of the existing hinge and has the effects described above. Therefore, it can be used in a field that could not be used before.

(A) is a perspective view which shows an example of the spiral spring type | mold hinge of this invention, (b) is the end elevation, (c) is a top view. The perspective view which shows an example of the hinge using the conventional coil spring.

DESCRIPTION OF SYMBOLS 1, 2 Blade plate 3, 4 Connection part 6 Connection shaft 7 Spiral spring 8 Arrangement space 9, 10 Notch part 11 Inner latching part 12 Outer latch part A, B Blade plate C Connection part D Connection shaft E Coil spring

Claims (1)

In the hinge in which the connecting part of the two blades is connected to be openable and closable by the connecting shaft, and both blades are urged in the opening or closing direction by a spring provided on the outer periphery of the connecting shaft
The two blades are rectangular plates, and a notch opening from one surface side of the blade plate to the other surface side is formed at the inner side end in the width direction of each blade plate. The notch is elongated in the longitudinal direction of the blade, and each blade has a cylindrical connecting part on both outer sides in the longitudinal axis direction than the notch, and the both blades are opposed to the notch. The connecting portions of the two blades are arranged on the same axis, the connecting shafts are inserted into the connecting portions so as to be openable and closable, and an arrangement space is formed by the notches of the two blades arranged opposite to each other. A spiral spring is wound around the outer periphery of a part of the connecting shaft in the axial direction, and the spiral spring is a spiral spring in which a thin tape-like flat plate is wound in an end view, and is wound around the outer periphery of the connecting shaft. A portion below the connecting shaft of the spiral spring is accommodated in the arrangement space. A thin plate-like inner locking portion which is the entire width or a partial width of the inner end portion in the winding direction of the spiral spring is locked to the connecting shaft, and the entire width or the partial width of the outer end portion in the winding direction of the spiral spring. A thin plate-like outer locking portion is projected from the notch portion of the one blade plate to the outside of the blade plate under the blade plate and folded back on the blade plate at the outer peripheral edge portion of the blade plate. Locked to the blade,
A spiral spring type hinge characterized by that.

Images