JP2006193929A - Opening and closing door making use of three-latch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening and closing door making use of three-latch capable of reducing a cost required for the opening and closing door by eliminating the establishment of a projected section to the central latch without welding a stopper to the inside of the door. <P>SOLUTION: In the opening and closing door making use of the three-latch having the central latch 13 provided with a handle 11 performing opening and closing operation and mounted on the handle so as to interlock with the handle, the upper latch 18 and the lower latch 17 mounted on interconnecting plates 15 and 16 so as to interlock with both interconnecting plates 15 and 16 mounted on both end sections of the central latch 13 so as to interlock with the central latch 13, and when both interconnecting plates 15 and 16 make the movement of a certain distance by interlocking with the operation of the handle 11, the three-latch having a rotary stop washer 14 placed so as to hold between both interlocking plates 15 and 16 is used. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure of a latch used for a door of a switchboard casing.

  Since electrical devices and the like are housed inside the switchboard cabinet, it is necessary to avoid contamination of the electrical equipment such as dust and dust inside the switchboard cabinet. However, there are cases where it is necessary to install a switchboard housing in an environment where there is a lot of dust or dust, or outdoors. In such a case, use a highly sealed holding mechanism for holding the switchboard cabinet open / close door in a closed state so that dust or dust does not enter the switchboard cabinet. (For example, refer to Patent Documents 1 and 2).

  An open / close door using a triple latch is particularly effective as a technique with excellent sealing performance of the holding mechanism. FIG. 6 shows a front sectional view and a side sectional view of an opening / closing door using the triple hanger.

  As shown in FIG. 6, the open / close door using a triple latch has a handle 11 for opening and closing the door, three latches 13, 17, and 18 arranged at the center, upper part, and lower part of the door, and an upper latch. The connecting plate 15 connects the 18 and the central latch 13, and the connecting plate 16 connects the lower latch 17 and the central latch 13.

  A detailed configuration will be described below. The front end portion of the handle 11 that opens and closes the opening / closing door has a nut shape. The mounting bolt 12 is inserted into the central hole of the central latch and is tightened with the nut at the front end portion of the handle 11, thereby Install so that the central latch 13 is interlocked. Alternatively, the handle 11 can be attached so that the handle 11 and the center latch 13 are interlocked by making the tip of the handle 11 into a bolt shape, fitting it into the center hole of the center latch and tightening it with a tightening nut.

  Holes are provided in the left and right end portions of the central latch 13, and one ends of connecting plates 15 and 16 are respectively attached to these holes. The other ends of the connecting plates 15 and 16 are an upper latch 18 and a lower latch, respectively. 17 is attached. The latches 13, 17, 18 and the connection plates 15, 16 are attached so that the connection plates 15, 16 are freely rotatable around the attachment holes of the latches. For this reason, the central latch 13, the coupling plates 15 and 16, and the upper and lower latches 17 and 18 are interlocked by the handle operation.

  In the open / close door using the triple latch, in a closed state, the three convex portions of the upper latch 18, the central latch 13 and the lower latch 17 press and crush the packing attached to the outer edge of the open / close door. In addition, a gap for dust and dust to enter between the switchboard casing and the open / close door is prevented.

Further, when the handle 11 is rotated to open the door, the central latch 13 is rotated in conjunction with the rotation operation, and the upper portion is connected via the connecting plates 15 and 16 attached to both ends of the central latch 13. The latch 18 and the lower latch 17 rotate in conjunction with each other. By rotating the latches in this manner, the convex portions of the upper latch 18, the central latch 13, and the lower latch 17 are not pressed against the packing, and the door can be opened.
JP 2000-78710 A JP-A-8-289419

  As shown in FIG. 7, when the handle 11 is turned to open the open / close door, if the rotation angle of the handle 11 is large, the rotation of the central latch 13 is also increased in conjunction with this. For this reason, the connecting plate 16 that connects the central latch 13 and the lower latch 17 is pulled up more than necessary, and the attachment point of the lower latch 17 and the connecting plate 16 that are fulcrums is too close to the rotating shaft 19 of the latch. (C). In such a state, even if the handle 11 is rotated in the closing direction, the connecting plate 16 cannot rotate the lower latch 17 and the lower latch 17 cannot be returned to the closed state.

  In order to avoid such a situation, a protrusion 71 is provided on the central latch 13 and when it is moved by a certain angle, it is brought into contact with a stopper 72 provided inside the door, thereby limiting the rotation angle of each latch by the handle operation. (B).

  However, such a method is costly because it is necessary to melt the stopper 72 inside the door and to provide the protrusion 71 on the central latch. In addition, there is a problem that it is difficult to adjust the rotation angle of the handle 11 after installation.

  This invention is made | formed in view of this situation, The objective is to provide the triple latch used for the opening / closing door of the switchboard housing which solved the said subject.

Accordingly, in order to solve the above-described problem, the invention according to claim 1 is configured so that a handle for performing an opening / closing operation, a central latch attached to the handle to be interlocked with the handle, and interlocked with the central latch. Opening and closing using a triple latch having two coupling plates attached to both ends of the central latch, and an upper latch and a lower latch attached to each coupling plate in conjunction with each coupling plate The door has a non-rotating washer installed so as to be sandwiched between the two connecting plates when the two connecting plates move by a certain distance in conjunction with the operation of the handle.

  The invention according to claim 2 is characterized in that the non-turn washer is integrally formed with a bolt for attaching the central latch to the handle.

  In the first aspect of the present invention, when the two connecting plates move by a certain distance in conjunction with the operation of the handle, a washer is sandwiched between the two connecting plates, so that the movement range of the connecting plate is limited. The Accordingly, it is possible to prevent a situation in which the connecting plate is pulled up more than necessary due to the rotation of the handle, and the attachment point of the lower latch that is the fulcrum and the connecting plate is too close to the rotating shaft of the latch. Therefore, even if the handle is rotated in the closing direction, the connecting plate cannot rotate the lower latch and the situation where the lower latch cannot be returned to the closed state does not occur.

  Since the non-turn washer can be easily replaced, the movement range of the connecting plate, that is, the rotation range of the handle can be easily adjusted.

  Furthermore, in the invention described in claim 2, since the washer and the bolt are integrally formed, it is possible to reduce the number of members.

  According to the first aspect of the present invention, it is not necessary to melt the stopper inside the door and to provide a protrusion on the central latch, and it is possible to reduce the cost of the door.

  In addition, it becomes easy to adjust the rotation angle of the handle even after installation.

  Furthermore, according to the second aspect, it is possible to reduce the cost of the opening and closing door by reducing the number of members.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1: is the front view (a) and A direction arrow view (b) of an opening-and-closing door using the triple hanger used for Embodiment 1. FIG. As shown in FIG. 1, the tip end portion of the handle 11 that opens and closes the opening / closing door has a nut shape, and the mounting bolt 12 is inserted into the center hole of the center latch 13 and is attached to the nut at the tip end portion of the handle 11. The handle 11 and the central latch 13 are attached so as to interlock with each other, and a non-rotating washer 14 is inserted between the mounting bolt 12 and the central latch 13 as shown in FIG.

  When the handle 11 is rotated to open the door by inserting the non-turn washer 14 between the mounting bolt 12 and the central latch 13 in this way, the two connecting plates 15 and 16 are moved by a certain distance. Then, these connecting plates 15 and 16 sandwich the non-turn washer 14, and the movement range of the connecting plates 15 and 16 is limited. As a result, the connection plate 16 is lifted more than necessary due to the rotation of the handle 11, and the attachment point between the lower latch 17 and the connection plate 16 as the fulcrum is too close to the rotation shaft 19 of the latch. Can be prevented. Therefore, even if the handle 11 is rotated in the closing direction, the connecting plate 16 cannot rotate the lower latch 17 and the situation that the lower latch 17 cannot be returned to the closed state does not occur.

  In addition, since the non-turn washer 14 can be easily replaced only by removing the mounting bolt 12, it is possible to easily adjust the movement range of the connecting plates 15, 16, that is, the rotation range of the handle 11. .

(Embodiment 2)
FIG. 3 is an upper view (a) and a side view (b) of a bolt used in the second embodiment. As shown in FIG. 3, it is possible to attach the handle and the central latch using a mounting bolt in which a non-rotating washer 32 is integrally attached to the lower portion of the tightening portion 31.

(Embodiment 3)
FIG. 4 is a top view (a) and a side view (b) of a bolt used in the third embodiment. As shown in FIG. 4, it is possible to attach the handle and the central latch using a mounting bolt in which the tightening portion 41 and the non-turn washer 41 are integrated.

(Embodiment 4)
FIG. 5: is the front view (a) and arrow A direction view (b) of an opening-and-closing door using the triple hanger used for Embodiment 4. FIG. As shown in FIG. 5, the handle 11 and the central latch 13 are interlocked by making the tip of the handle 11 into a bolt shape, fitting it into the central hole of the central latch 13 and tightening it with the tightening nut 51. Further, a detent washer 14 is inserted between the tightening nut 51 and the central latch 13.

  When the handle 11 is rotated to open the opening / closing door by inserting the non-rotating washer 14 between the tightening nut 51 and the central latch 13 in this way, the two connecting plates 15 and 16 are moved by a certain distance. Then, these connecting plates 15 and 16 sandwich the non-turn washer 14, and the movement range of the connecting plates 15 and 16 is limited. As a result, the connection plate 16 is lifted more than necessary due to the rotation of the handle 11, and the attachment point between the lower latch 17 and the connection plate 16 as the fulcrum is too close to the rotation shaft 19 of the latch. Can be prevented. Therefore, even if the handle 11 is rotated in the closing direction, the connecting plate 16 cannot rotate the lower latch 17 and the lower latch 17 cannot be returned to the closed state.

  Note that since the non-turn washer 14 can be easily replaced by simply removing the tightening nut 51, it is possible to easily adjust the movement range of the connecting plates 15, 16, that is, the rotation range of the handle 11. .

The front view (a) and A direction arrow view (b) of an opening-and-closing door using the triple hanger used for Embodiment 1. FIG. Installation explanatory drawing of a non-turn washer. The upper view (a) and side view (b) of the volt | bolt used for Embodiment 2. FIG. The top view (a) and side view (b) of the volt | bolt used for Embodiment 3. FIG. The front view (a) and A direction arrow view (b) of the opening-and-closing door using the triple hanger used for Embodiment 4. FIG. The block diagram (a) and B direction arrow figure of an opening-and-closing door using a triple latch. Explanatory drawing of the handle operation of the open / close door using a triple latch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Handle 12 ... Mounting bolt 13 ... Center latch 14 ... Non-turn washer 15 ... Connection plate 16 ... Connection plate 17 ... Lower latch 18 ... Upper latch 19 ... Rotating shaft 31 ... Fastening part 32 ... Non-turn washer 41 ... Tightening Part and detent washer 71 ... Projection 72 ... Stopper

Claims (2)

A handle for opening and closing;
A central latch attached to the handle to interlock with the handle;
Two connecting plates attached to both ends of the central latch to interlock with the central latch;
An open / close door using a triple latch having an upper latch and a lower latch attached to each of the coupling plates so as to be interlocked with each of the coupling plates;
When the two connecting plates are moved by a certain distance in conjunction with the operation of the handle, a three-way latch having a non-rotating washer installed so as to be sandwiched between the two connecting plates is used. Open / close door.   The open / close door using a triple latch according to claim 1, wherein the non-turn washer is integrally formed with a bolt for attaching the central latch to the handle.

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