JPH04105503A - Door operating device for switchboard - Google Patents

Abstract

PURPOSE:To prevent opening of a door due to vibration by providing a link mechanism made of engaging grooves laterally symmetrical, a latch plate, a spring support pin, a leaf spring, arm, etc., at a door to be engaged with pins provided laterally symmetrically at upper and lower pin seats of an opening of a body. CONSTITUTION:Hinge pins 3, 3' are stood laterally symmetrically at pin seats 12 provided at upper and lower parts of an opening 11 of a body 1. Engaging grooves 21, 21' to be engaged with the pins 3, 3' are formed laterally symmetrically at a stationary plate of a door 2, and latch plates 4, 4' to be separated from and connected to latch grooves 42, 42' are so provided at the pins 3, 3' as to be rotatable at shafts 41, 41', respectively. Leaf springs 6, 6' are mounted between the pins 5, 5' and levers 43, 43' to press the levers 43, 43'. When a right handle 8 of the door 2 is pulled in a direction of an arrow A, the spring 6 is bent, the plate 4 is removed from the pin 3 to set a left handle 8' to impossible to operate. If a left handle 8' is initially pulled, the handle 8 becomes impossible to operate. Thus, the door can be opened from either side to prevent the natural opening of the door due to vibration.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a door for a power distribution board installed side by side in an electrical room or the like, and to a door that can be opened and closed from any left or right direction.

[Prior Art] Conventionally, a door opening/closing device configured as follows has been disclosed which allows the door of a box-shaped container such as a switchboard to be opened and closed from any left or right direction. That is, hinge pins are provided at predetermined intervals on both left and right ends of either the door or the main body to which the door is attached, and the other side is provided with a fixing plate having an engagement groove that engages with the hinge pin. A latch plate is attached to the fixing plate, which has a latch groove that intersects with the engagement groove and locks the hinge pin, and which engages and disengages from the hinge pin when the latch groove rotates. This is to prevent the other latch plate from becoming unlocked when either one of these latch plates is in the unlocked state. A connecting rod having a lock pin that slidably engages a lock groove provided in the latch plate and a slide groove provided in the fixing plate to prevent rotation of the latch plate is attached to each left and right latch plate. It is connected and provided. A device in which a pair of hinge pins, a fixing plate, a latch plate, a connecting rod, etc. are provided on the upper and lower sides of the door and the main body, respectively, has been disclosed (for example, Japanese Patent Laid-Open No. 1-285772).

[Problem to be Solved by the Invention] However, when the door opening/closing device described above is used in a power distribution board that is installed side by side in an electrical room where there is vibration such as a manufacturing factory, the above structure does not allow the door to be latched when the door is closed. Since there is nothing to forcibly stop the plate, either the left or right latch plate rotates due to vibration, the hinge pin escapes from the engagement groove and latch groove, and the door opens.

An object of the present invention is to provide a stable door opening/closing device that reliably maintains the door in the closed state.

[Means for Solving the Problems] The present invention provides a pin seat provided at the top and bottom of an opening on either the door or the main body side to which the door is attached, and a pin seat provided at a predetermined interval at both left and right ends of the pin seat. a hinge pin provided with an opening therebetween, a fixing plate having an engagement groove on the other side that engages with the hinge pin, and the fixing plate intersecting with the engagement groove,
a latch plate that is provided with a latch groove that engages with the hinge pin and that rotates about a support shaft that is rotatably supported by the fixed plate as a fulcrum to disengage the hinge pin; and the left and right latch plates. In the door opening/closing device for a switchboard, the door opening/closing device for a power distribution board is equipped with an interlock mechanism that maintains a locked state when one of the latch plates is in an unlocked state, the spring being rotatably supported by the fixed plate. support pin,
A leaf spring is supported in a curved manner between the latch plate and the spring support pin when the door is closed, and acts to press the latch plate against the hinge pin.

Further, the leaf spring instantaneously reverses the bending direction by a snap action to move the latch plate from the locked position to the unlocked position.
Alternatively, it can be rotated from the unlocked position to the locked position.

Further, a stopper pin provided on the fixed plate near the tip of the latch plate and protruding toward the pin seat, and a stopper pin provided on the stopper pin and pressed toward the pin seat when the door is closed. A mechanism for preventing the door from falling off includes a protrusion that disengages from the latch plate and disengages from the pin seat and engages with the latch plate when the door is in an open state.

[Function] When the door is closed, insert a leaf spring in a curved manner between the spring support pin and the latch plate so that the latch plate is in the locked position and pressed against the hinge pin, keeping the door pressed against the main body. That's how it is.

Additionally, when opening one side of the door, the snap action of the leaf spring instantly flips the latch plate from the locked position to the unlocked position, allowing the door to be opened, and the interlock mechanism prevents it from being opened from the other side. That's how it is.

Furthermore, since the latch plate is prevented from returning from the unlocked position to the locked position when the door is opened, the door will not fall off.

[Example code] The present invention will be described with reference to embodiments shown in the drawings.

FIG. 1 is a plan sectional view showing an embodiment of the present invention, and FIG. 2 is a side sectional view. Pin seats 12 are provided at the upper and lower parts of the opening 11 of the main body 1, and the door 2 is supported. Hinge pins 3.3' are fixed symmetrically to the pin seats 12, and hinge pins 3.3' or 3' are fixed to the upper and lower surfaces of the door 2 so that the opposing hinge pins 3 or 3 can rotate with the hinge pins 3 or 3' as fulcrums. Arc-shaped engagement grooves 21, 21' are provided so that the hinge pin 3.3' engages with the engagement grooves 21.21'. Also, the latch plate 4. is supported via a support shaft 41.41' so as to be rotatable via a bearing on a pair of brackets 22.22' fixed at symmetrical positions on the upper and lower surfaces of the door 2. The latch plate 4.4' is provided with a latch groove 42.4' which is engaged with the hinge pin 3.3° when the door 2 is closed, and which intersects the engagement groove 21.21'.
42° is provided at a symmetrical position. Support shaft 41.4
A lever 43.43' is fixed to the lever 43.43', and a pair of levers 43.43' are connected by a connecting rod 45 via a connecting pin 44.44' provided at the tip of the lever 43.43'. The pin hole into which either one of the connecting pins 44, 44 of the connecting rod 45 engages is formed into an elongated hole. The levers 43, 43' and the connecting rod 45 form an interlock mechanism that prevents the left and right doors 2 from being opened simultaneously. A spring support pin 5.5' is rotatably supported on the bracket 22.22, and a spring groove is provided in the spring support pin 5.5', into which one end of a leaf spring 6.6' is inserted, and the latch is inserted into the spring support pin 5.5'. The other end of the leaf spring 6.6' is inserted into the spring groove provided in the plate 4.4, and the leaf spring 6.6' is in a curved state when the door 2 is closed. The inner surface of the 42.42° latch groove of .4' acts to press against the hinge pin 3.3'.

On the door 2 near the tip of the latch plate 4.4', a stopper pin 7.7' is pressed toward the pin seat 12 by helical springs 71, 71', as shown in FIG. , door 2 is opened and stopper pin 7.7' is in pin seat 1.
A protrusion 72.72° is provided which engages the tip of the latch plate 4.4' when the latch plate 4.4' is removed from the latch plate 2, thereby forming a mechanism for preventing the door from falling off. Handles 8 are located at symmetrical positions on both sides of the outside of door 2.
．． 8" is installed.

Here, a case will be described in which the door 2 is opened by pulling the right handle 8 from the closed state shown in FIG. 1.

When the handle 8 is pulled in the direction of arrow A, the support shaft 41 of the latch plate 4 is pulled to the outside of the main body l relative to the hinge pin 3 fixed to the pin seat 12, and the latch plate 4 is moved as shown in FIG. Then, it rotates in response to a counterclockwise moment about the support shaft 41 as a fulcrum.

In this case, up to a certain moment value, the rotation of the latch plate 4 is resisted by the restoring force of the snap mechanism, that is, the restoring force of the leaf spring 6 inserted in a curved shape between the spring support pin 5 and the latch plate 4. However, by continuing to pull the handle 8, the moment exceeds the restoring force of the leaf spring 6, and at that point, the bending direction of the leaf spring 6 is instantaneously reversed by a snap action, as shown in FIG. At the same time, due to the reaction, the inside of the latch groove 41 of the latch plate 4 comes off from the hinge pin 3.
Rotate until it hits the side of the hinge pin 3.

In addition, even if you pull the other handle 8° in this state, since the levers 43 and 43° are connected by the connecting rod 45, the latch plate 4° cannot be rotated due to the interlock mechanism, and the left and right doors 2 cannot be rotated at the same time. won't open.

Further, when the right side of the door 2 is opened, the latch plate 4 is at a position where it is released from the hinge pin 3, that is, at an unlocked position.

However, in the unlikely event that for some reason the latch plate 4 is damaged by the hinge pin 3
When the latch plate 4' is returned to the locking position, the latch plate 4' on the 3° side of the hinge pin, which is the fulcrum side for opening the door, is in a state where the interlock is released. Therefore, if the left handle is pulled 8 degrees, the door 2 will be pulled out from the hinge pin 3', which may lead to an accident in which the door 2 falls off.

In order to prevent this door from falling off, a door falling prevention mechanism is provided, and its operation will be explained next.

Furthermore, when the door 2 is opened, the hinge pin 3 is removed from the engagement groove 21 and the door is opened. When the protrusion 72 is released and pushed upward by the restoring force of the helical spring 71, it engages with the latch plate 4, preventing the latch plate 4 from being reversed and being returned to the locked position.

Next, when closing the door 2, press the /% handle 8 and place the upper and lower surfaces of the door 2 on the pin seats 12, and the latch plate 4
The stopper pin 7 that was preventing the rotation of the projection part 7 hits the pin seat 12 and is pushed down against the helical spring 71.
2 comes off from the latch plate 4. Subsequently, the side surface of the hinge pin 3 is pressed against the latch groove 42 of the latch plate 4, and the latch plate 4 also rotates clockwise about the support shaft 41 as a fulcrum, as shown in FIG. At a certain point, the leaf spring 6 is instantaneously reversed by its snap action, keeping the latch plate 4 pressed against the hinge pin 3 and the door 2 pressed against the main body 1, as shown in FIG.

The above explanation describes the operation when the right side of the door is pulled, but when the left side is pulled, the effect is the same as when the right side is pulled, and as a result, the door can be opened and closed from either the left or right side. can.

Alternatively, the door and the main body may be reversed, and the door may be provided with a hinge pin, and the main body may be provided with an interlock mechanism such as an engagement groove or a latch plate, or a mechanism for preventing the door from falling off.

[Effects of the Invention] As described above, according to the present invention, the leaf spring is inserted in a curved manner between the spring support pin and the latch plate with the door closed, and the latch plate is pressed against the hinge pin to open the door. When the door is pressed against the main body and the door is closed from the open position, the snap action of the leaf spring returns the latch plate from the unlocked position to the locked position to maintain the state in which the door is pressed against the main body, thereby reducing vibration etc. Even if there is a problem, the door will not open easily, and the closed state can be maintained reliably.

In addition, since the interlock mechanism and door fall prevention mechanism are installed, the door will not fall off when it is open, and it can be opened and closed from either the left or right. This has the effect of providing a safe door opening/closing device that can be opened and closed without interference with the switchboard.

[Brief explanation of the drawing]

Fig. 1 is a plan sectional view showing an embodiment of the present invention, Fig. 2 is a front sectional view of the main part, Fig. 3 is a side sectional view of the main part, and Figs. 4, 5, and 6 explain the operation. FIG. ■...Body, 11...Opening, 12...Pin seat,
2...Door, 21.21'...Engagement groove, 22.22
゛...Bracket, 3.3°...Hinge pin, 4
．． 4'...Latch plate, 41,41'...Support shaft,
42.42゛... Latch groove, 43.43゛... Lever, 44.44'... Connecting pin, 45... Connecting rod, 5
．． 5'... Spring support pin, 6.6'... Leaf spring,
7.7°...stopper pin, 71.71'...
Helical spring, 72.72'...Protrusion, 8.8゛...
・Handle Figure 2 Figure 3

Claims (1)

[Claims] 1. Pin seats provided at the top and bottom of the opening on either the door or the main body side to which the door is attached, and a pin seat provided at a predetermined interval on both left and right ends of the pin seat. a fixing plate having an engagement groove on the other side that engages with the hinge pin; the fixing plate has a latch groove that intersects with the engagement groove and engages with the hinge pin; a latch plate that rotates about a support shaft rotatably supported by the hinge pin to disengage from the hinge pin; and a latch plate that is disengaged from the hinge pin when either one of the left and right latch plates is in an unlocked state. In the door opening/closing device for a power distribution board, the door opening/closing device for a power distribution board is provided with an interlock mechanism that maintains a locked state, and the spring support pin is rotatably supported by the fixed plate, and the latch plate is provided between the latch plate and the spring support pin. A door opening/closing device for a power distribution board, comprising a leaf spring that is supported in a curved shape when the door is closed and acts to press the latch plate against the hinge pin. 2. Claim 1, wherein the leaf spring instantaneously reverses its bending direction by a snap action to rotate the latch plate from the locked position to the unlocked position or from the unlocked position to the locked position. door opening/closing device for the switchboard. 3. Provided on the fixing plate near the tip of the latch plate,
a stopper pin that protrudes toward the pin seat; and a stopper pin provided on the stopper pin that is pressed toward the pin seat when the door is closed to disengage the latch plate and open the door. 3. The door opening/closing device for a power distribution board according to claim 1, further comprising a door fall prevention mechanism comprising a protrusion that disengages from the pin seat and engages with the latch plate when the latch plate is in the locked state.