JPS637957Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention: [Industrial application field] This invention relates to a hinge for a door that opens by elastic restoring force.

[Prior Art] Conventionally, there has been a door opening/closing mechanism that uses elastic restoring force of a spring or the like to assist the door opening operation when opening the door.

[Problems to be solved by the invention] In such a door opening/closing mechanism, if the elastic modulus of the spring is large, the door may open suddenly with a strong force, surprising the person opening the door. On the other hand, if the elastic modulus of the spring is small, the door will open more loosely and may be difficult to open.

This invention was made in view of the points mentioned above, and was made with the aim of providing a hinge for a door that opens strongly at the beginning of the opening, and then opens slowly.

Structure of the invention: As shown in Fig. 1 A, B, and C, the door hinge of this invention is fixed to the chassis and attached to the stator part 2.
A spring 3 is engaged between a pivot shaft 2a forming a shaft 2a and a rotor section 1 in which a rotational viscous section 1a on which viscosity acts is mounted between the pivot shaft 2a. This configuration is characterized in that a rotation section means 4 that rotates by a fixed angle due to generated force is provided and connected. In FIGS. 1A, 1B, and 1C, reference numeral 4a indicates an elongated hole formed in the stator section 2, and reference numeral 1b indicates an elongated hole formed in the rotor section 1 that passes through the elongated hole 4a.
A vertical pin, numeral 5 is an adjustment tool for adjusting the elastic restoring force of the spring 3, numeral 6 is a door to be attached to the rotor part 1, numeral 7 is a pivot 2
It shows that a is a fixing pin for fixing to the stator part 2 so as not to rotate.

The rotational viscous part 1a has an annular gap formed between the pivot shaft 2a and the rotor part 1, and a viscous substance such as grease is interposed in this gap. The constant angle rotation section means 4 is provided at a rotational position corresponding to the beginning of opening of the door 6, and by passing the pin 1b provided upright on the rotor part 1 into the long hole 4a formed in the stator part 2, the long hole 4a and the pin are connected. The positional relationship with 1b realizes a constant angle rotation means.

FIG. 2 is a diagram illustrating the operation of the rotating section means 4, and when the pin 1b in the elongated hole 4a is in the position shown in FIG. 2A, the door 6 is closed. Second
Between the state shown in FIG. A and the state shown in FIG. 2B, the elastic restoring force of the spring 3 acts on the rotor section 1, causing the rotor section 1 to rotate strongly and quickly. Between the state shown in FIG. 2A and the state shown in FIG. 2B, a rotational force obtained by subtracting the opposite viscous resistance of the rotational viscous part 2a from the elastic restoring force of the spring 3 acts on the rotor part 1, and the rotor part 1 becomes weak. Rotate slowly. Therefore, the door 6 opens strongly and quickly at the beginning of opening, and following this opening movement, the door 6 opens weakly and slowly.

When closing the door 6, the relative position of the pin 1b and the elongated hole 4a is brought to the position shown in FIG. The closing operation of the door 6 is completed by the hook.

Effect of the invention: With the door hinge of this invention, when the locking mechanism (not shown) of the door is removed, the door 6 opens strongly and quickly at the beginning, and the opening operation that follows the opening of the door 6 opens weakly and slowly. This eliminates the problem of the door 6 not being able to open, and also eliminates the rapid opening action that surprises the person opening the door.

[Brief explanation of the drawing]

Figure 1 is a drawing explaining the door hinge of this invention, where Figure 1A is a top view, Figure 1B is a front view, and Figure 1B is a front view.
Figure C is a side view, and Figure 2 is an explanatory diagram of the operation. 1...Rotor part, 1a...Rotational viscosity part, 1b...
...Pin, 2...Stator part, 2a...Pivot, 3...
... Spring, 4 ... Rotation section means, 4a ... Long hole, 5 ... Adjustment tool, 6 ... Door, 7 ... Fixing pin.

Claims (1)

[Scope of utility model registration request] A spring 3 is engaged between a pivot shaft 2a that is fixed to the chassis and forms a stator section 2, and a rotor section 1 in which a rotary viscous section 1a between which viscosity acts is fixedly attached. A hinge for a door, characterized in that the rotor part 1 is connected to a rotation section means 4 which rotates by a fixed angle by the elastic force of the spring 3.