JPH07331945A - Opening state holding mechanism of door - Google Patents

Abstract

PURPOSE:To provide the opening state holding mechanism of a door of excellent operability and safety. CONSTITUTION:When a door A is opened, respective links 1, 2 rotationally move so as to be opened centering around their connecting part 4, and when the connecting part 4 of the links 1, 2 reach the line connecting together connecting parts 6, 8 with the door A and a base frame B, the connecting part 4 exceeds the line connecting together the connecting parts 6, 8 with the the door A and the base frame B by the energization force of a spring 3. Hereafter, the projection 1a and the cutout 2a of the respective links 1, 2 are contacted with each other so as to regulate rotational movement, and hence the respective links 1, 2 are locked with each other so as to support the door A. In this case, when the respective links 1, 2 are rotationally moved accompanying opening of the door A, the connecting part 4 of the respective links 1, 2 exceeds the line connecting together the connecting parts 6, 8 with the door A and the base frame B by the energization force of the spring 3, hence it is unnecessary to push the respective links 1, 2 in the direction, and the respective links 1, 2 can be automatically locked only by opening the door A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door open state holding mechanism used for various industrial products having a door that opens and closes in the vertical direction such as an upper door of a showcase or a hood of an automobile.

[0002]

2. Description of the Related Art Conventionally, there are various types of mechanisms for holding a door that opens and closes in the vertical direction in an open state. For example, in FIG.
It is known that a pair of links 10 and 11 rotatably connected to each other are rotatably connected to a door A and an underframe B as shown in Fig. 1 and is used in a wide field because of its simple structure. ing. This mechanism allows each link 1 when the door A is closed.
0 and 11 are bent in a predetermined direction centering on the connecting portion 12 of each other, and when the door A is opened, the links 10 and 11 rotate in the other direction centering on the connecting portion 12 of each other, and the links 10 and 11 are connected to each other. At a position where the connecting portion 12 of the above crosses the line connecting the connecting portions 13 and 14 of the door A and the underframe B, the predetermined portions of the respective links 10 and 11 come into contact with each other so that the rotation is restricted, and the respective links 10 and 11 are It locks and supports the door A.

[0003]

However, when the door A is opened to lock the above-mentioned mechanism, the links 10 and 11 are closed.
Rotates about the connecting portion 12, but the connecting portion 12 between the links 10 and 11 cannot cross the line connecting the connecting portions 13 and 14 between the door A and the underframe B only by opening the door A. Therefore, it is necessary to push and lock the links 10 and 11 in that direction, which makes the operation complicated. Even if the links 10 and 11 are locked, if an unexpected external force is applied to the links 10 and 11 by accidentally touching them, the locked state may be accidentally released and an unexpected accident may occur. However, there were concerns about safety.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a door open state holding mechanism excellent in operability and safety.

[0005]

In order to achieve the above-mentioned object, the present invention rotatably connects a pair of links rotatably connected to each other to a door and an underframe, and opens each door. When the links rotate around the connecting parts in a predetermined direction and the connecting parts of the links cross the line connecting the connecting parts of the door and the underframe, the predetermined parts of the links are brought into contact with each other to rotate. The door open state holding mechanism that locks each link to support the door by restricting the movement includes an urging unit that urges each link in the rotation direction when the door is opened.

[0006]

According to the present invention, when the door is opened, the links rotate so as to open around the connecting portions of each other, and the connecting portions of the links reach the line connecting the connecting portions of the door and the underframe. Then, the connecting portion between the links crosses the line connecting the connecting portion between the door and the underframe by the biasing means. After that, predetermined portions of each link come into contact with each other to restrict rotation, and each link is locked to support the door. At this time, when each link rotates with the opening of the door, the connecting portion of each link crosses the line connecting the connecting portion of the door and the underframe by the biasing means, and thus the operation of pushing each link in that direction No need for, each link is automatically locked just by opening the door. Further, since the biasing force always acts on each link in the locking direction, the locked state is not accidentally released.

[0007]

1 to 5 show an embodiment of the present invention. FIG. 1 is a side view of an open state holding mechanism, and FIG. 2 is a perspective view showing an attached state of the open state holding mechanism.

The open state holding mechanism comprises a pair of links 1 and 2 rotatably connected to each other and a spring 3 for urging the links 1 and 2 in a predetermined turning direction. , 2 are connected by pins.

One end of the link 1 is fixed to the door A through a mounting plate 5, and a connecting portion 6 between the link 1 and the mounting plate 5 is rotatably connected by a pin. A protrusion 1a is formed on the other end of the link 1, and the protrusion 1a forms a contact portion with the other link 2. Further, a hole 1b to which one end of the spring 3 is fixed is provided in the center of the link 1 in the longitudinal direction.

One end of the other link 2 is fixed to the underframe B via a mounting plate 7, and a connecting portion 8 between the link 2 and the mounting plate 7 is rotatably coupled by a pin. A notch 2a is formed at the other end of the link 2 to make contact with one of the links 1, and the projection 1a of the link 1 is received in the notch 2a.

The spring 3 has one end fixed to the hole 1b of the one link 1 and the other end fixed to the back surface of the door A. Further, the spring 3 is attached in a tensioned state, and biases the links 1 and 2 in the rotating direction when the door is opened.

In the above structure, when the door A is closed, the links 1 and 2 are bent around the connecting portion 4 as a fulcrum and are stored inside the door A. Further, when the door A is opened, as shown in FIG. 3, the links 1 and 2 rotate so as to open around the connecting portion 4 of each other, and as shown in FIG.
When the connecting portion 4 between them reaches a line (a dashed-dotted line in the figure) connecting the connecting portions 6 and 8 between the door A and the underframe B, as shown in FIG. The connecting portion 4 of the above crosses the line connecting the connecting portions 6 and 8 of the door A and the underframe B.
After that, the protrusion 1a of each of the links 1 and 2 and the notch 2a are brought into contact with each other to restrict the rotation, and the links 1 and 2 are locked to support the door A. At that time, when the links 1 and 2 are rotated with the opening of the door A, the connecting portion 4 between the links 1 and 2 is connected to the connecting portions 6 and 8 between the door A and the underframe B by the urging force of the spring 3. Since it crosses the line connecting the
The links 1 and 2 are automatically locked simply by opening the door A without the need to press 2. Further, when the door A is closed, the locked state is released by pressing the links 1 and 2 in the opposite direction when the door is opened against the urging force of the spring 3 while the door A is supported by the hand.

As described above, according to this embodiment, the links 1 and 2 are urged by the spring 3 in the rotation direction when the door is opened, and the urging force of the spring 3 connects the links 1 and 2 to each other. Since 4 is configured to cross the line connecting the connecting portions 6 and 8 of the door A and the underframe B, each link 1 and 2 can be automatically locked only by opening the door A, and the operability is improved. It can be greatly improved. Also, each link 1, 2
Since the biasing force of the spring 3 always acts in the lock direction, the lock state is not released accidentally, and there is an advantage that the safety is excellent.

[0014]

As described above, according to the present invention,
Each link can be locked automatically just by opening the door, which can greatly improve the operability. In addition, since the locked state is not inadvertently released, there is an advantage that the safety is excellent.

[Brief description of drawings]

FIG. 1 is a side view of a door open state holding mechanism showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an attached state of an open state holding mechanism.

FIG. 3 is an operation explanatory view of an open state holding mechanism.

FIG. 4 is an operation explanatory view of an open state holding mechanism.

FIG. 5 is an operation explanatory diagram of an open state holding mechanism.

FIG. 6 is a perspective view showing a conventional door open state holding mechanism.

[Explanation of symbols]

1 ... Link, 2 ... Link, 3 ... Spring, 4, 6, 8
... connecting part, A ... door, B ... underframe.

Claims (1)

[Claims] 1. A pair of links, which are rotatably connected to each other, are rotatably connected to a door and an underframe, respectively, and when the door is opened, the links are rotated in a predetermined direction around their connecting portions. When the linking part of each link crosses the line connecting the connecting part of the door and the underframe, the predetermined part of each link is brought into contact with each other to regulate the rotation, so that each link is locked and the door is opened. An open door holding mechanism for supporting, wherein the door open holding mechanism is provided with an urging means for urging each of the links in a rotation direction when the door is opened.