JPH0775220A - Door opening and closing mechanism for switchboard - Google Patents

Abstract

PURPOSE:To make it possible to stably engage a door even though a sufficient distance cannot be taken between a handle shaft and a door end in a door opening and closing mechanism of a switchboard equipped with a link mechanism for inhibiting the opening of the door at other end side of the door opened or closed with one end side coupled with a hinge to a frame body of the switchboard. CONSTITUTION:This mechanism comprises a handle shaft 2 that pivots and pass through a door to the other end side of the door, a strip-shaped lever 9 fixed to an end portion on the rear side of the door of the handle shaft 2 by shifting the center in the length direction, a first rod 5 with its one end in a freely pivotable manner pin-coupled to one end of a longer side of the lever 9, a V-shaped link 8 having two sides with different lengths which is supported by a shaft to the door in a freely pivotable manner at a V-shaped bent point 8A, and a second rod 6 with its one end pin-coupled in a freely pivotable manner to an end portion of a longer side of the V-shaped link 8. A slot 8B is provided at an end portion of a shorter side of this V-shaped link 8, and this slot 8B is pin-coupled to other end of a shorter side of the lever 9 in a freely pivotable manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a door opening / closing mechanism of a switchboard.

[0002]

2. Description of the Related Art FIG. 3 is a rear view showing an example of the structure of a conventional door opening / closing mechanism of a switchboard, and FIG. 4 is a side view of FIG. 3 taken along the line BB. In FIG. 3 and FIG. 4, a handle shaft 2 that penetrates through the door 1 and rotates to the other end side of the door 1 that is opened and closed by being connected to the frame body 10 of the switchboard by a hinge (not shown) at one end side.
The handle 3 is fixed to one end of the handle shaft 2 on the front surface side of the door, and the center of the strip-shaped lever 4 in the longitudinal direction is fixed to the other end of the handle shaft 2 on the rear surface side of the door.

A first rod 5 and a second rod 6 each having one end rotatably pin-coupled are provided at both ends of the lever 4, and the first rod 5 and the second rod 6 are respectively different from each other. The end is guided by the guide 7 attached to the door 1, and when the door 1 is closed, the handle shaft 2 is rotated in the direction of arrow C to engage with the frame body 10 of the switchboard and prevent the door 1 from opening. It is supposed to do.

When the door 1 is opened, the handle shaft 2 is rotated in the direction opposite to the arrow C to engage the other ends of the first rod 5 and the second rod 6 with the frame body 10 of the switchboard. To cancel.

[0005]

In such a conventional structure, there is a case where the distance D between the handle shaft 2 and the end of the door cannot be sufficiently set due to the design of the layout of parts inside the switchboard or the door. In this case, the length of the lever 4 that governs the horizontal width dimension of the door opening / closing mechanism must be shortened, and the first rod 5 and the second rod 6 obtained by the rotation of the handle shaft 2 must be shortened. There is a possibility that the stroke S becomes small and the door 1 is not completely locked.

Therefore, an object of the present invention is to provide a structure of a door opening / closing mechanism of a switchboard, in which the door is stably locked even if the distance D between the handle shaft 2 and the door end is not sufficient. .

[0007]

In order to achieve the above object, the present invention has a link for preventing the door from being opened at the other end of the door which is opened and closed by connecting one end with a frame of a switchboard by a hinge. In a door opening / closing mechanism of a switchboard having a mechanism, a handle shaft that penetrates through the other end of the door and rotates, a handle fixed to one end on the front side of the handle shaft, and a handle shaft door A strip-shaped lever fixed to the other end on the back side of the lever by shifting the center in the length direction, a first rod whose one end is rotatably pin-coupled to one end on the long side of the lever, and a V-shaped lever. A V-shaped link rotatably supported by a door at a bending point and having two sides of different lengths, and a second V-shaped link whose one end is rotatably pin-coupled to the end of the longer side. A rod is provided, and an elongated hole is provided at the end of one short side of the V-shaped link. Serial and short side and the other end of the lever slidably pin coupled.

[0008]

According to the structure of the present invention, the displacement of the tip of the lever caused by the rotation of the handle shaft is amplified by the V-shaped link and transmitted to the rod, so that the stroke of the rod increases.

[0009]

FIG. 1 is a back view showing the structure of an embodiment of the present invention,
FIG. 2 is an enlarged view of part A of FIG. 1 and 2, the door 1, the handle shaft 2, the handle 3, the first rod 5, the second rod 6, the guide 7, the frame 10 and the like have the same uses and functions as those described in the conventional example. Therefore, the description is omitted.

A handle shaft 2 which rotates through the door 1 is provided at the end of the door 1, and a strip-shaped lever 9 is fixed to the end of the handle shaft 2 on the back side of the door. The length of this lever 9 is longer on the U side than on the V side, and the length dimension on the U side is set to be longer than 1/2 of the length of the lever 4 shown in the conventional example. One end of the first rod 5 is rotatably pin-coupled to one end on the long side of the lever 9, and the shorter end of the V-shaped link 8 having two sides different in length from the other end on the short side of the lever 9. A long hole 8B provided at the end of one side is slidably pin-coupled. The end of one longer side of the V-shaped link 8 is rotatably pin-coupled to one end of the second rod 6, and the bending point 8A of the V-shaped link 8 is rotatably supported by the door 1. There is.

Furthermore, the sum of the distance T between the pin connecting point with the second rod 6 at the end of the longer side of the V-shaped link 8 and the handle shaft 2 and the dimension U on the longer side of the lever 9 is conventional. It is set to be the same as the overall length of the lever 4 shown in the example. Therefore, the horizontal width of the door opening / closing mechanism according to the present invention is the same as that of the conventional example. With this configuration, the stroke S of the first rod 5 obtained by the rotation of the handle shaft 2 is the length on the U side of the lever 9 assuming that the rotation angle of the handle shaft 2 is the same as that of the conventional example. Becomes larger than that of the conventional example. Further, since the length of the lever 9 on the V side is shorter than that on the U side, the displacement of the tip is small, but if the length of the longer side of the V-shaped link is R and the length of the shorter side is Q, The stroke S given to the second rod 6 can be made larger than that of the conventional example by appropriately amplifying the displacement of the V-side tip of the lever 9 by R / Q times, and appropriately giving this R / Q ratio. it can.

[0012]

According to the structure of the present invention, when the horizontal width of the door opening / closing mechanism is the same as that of the conventional example, the strokes obtained in the first rod and the second rod can be increased, On the contrary, if the strokes of the first rod and the second rod are the same as those of the conventional example, the horizontal width dimension of the door opening / closing mechanism can be made smaller than that of the conventional example. Even if the distance between the door and the end of the door is not sufficient, a sufficient stroke can be obtained for the rod, so that the door can be locked stably.

[Brief description of drawings]

FIG. 1 is a back view showing the structure of an embodiment of the present invention.

FIG. 2 is an enlarged view of part A of FIG.

FIG. 3 is a rear view showing an example of a structure of a conventional door opening / closing mechanism of a switchboard.

FIG. 4 is a side view of FIG. 3 seen from the line BB.

[Explanation of symbols]

 1 Door 2 Handle Shaft 3 Handle 5 First Rod 6 Second Rod 8 V-Link 8A V-Link Bending Point 8B Oblong Hole 9 Lever 10 Frame

Claims (1)

[Claims] Claim: What is claimed is: 1. A door opening / closing mechanism for a switchboard comprising a link mechanism for preventing the door from opening at the other end of the door which is opened and closed by connecting one end to a frame of the switchboard by a hinge. The handle shaft that rotates through the door, the handle that is fixed to one end of the handle shaft on the front side of the door, and the handle shaft that is fixed to the other end of the back side of the door by shifting the center in the length direction. A strip-shaped lever, a first rod whose one end is rotatably pin-coupled to one end on the long side of the lever, and a V-shaped bending point rotatably supported by a door and having different lengths. A V-shaped link having two sides and a second rod whose one end is rotatably pin-coupled to the end of the longer side of the V-shaped link are provided, and the end of the shorter side of the V-shaped link is provided. A long hole is provided in the part, and this long hole and the other end on the short side of the lever are slidably connected by pins. Switchboard of the door opening and closing mechanism which is characterized.