JP3081074B2 - Door device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door device such as a distribution board.

[0002]

2. Description of the Related Art A conventional door device applied to a distribution board is configured such that an opening of a lower box is closed with a middle lid, and a door is mounted on a top end of the middle lid corresponding to an upper end of the opening via a horizontal shaft. Installed. In this case, in order to keep the door in the open state, as shown in FIG. 10, a locking projection 201 is provided on the door 200, and the pressing plate 203 and the pressing plate 203 are engaged with the inner lid 202 so as to face the locking projection 201. A coil spring 204 is provided to press against the stop projection 201, and the door 20
0, between the open state and the closed state, the locking projection 201 pushes the pressing plate 203 against the coil spring 204 to press the pressing plate 203.
Was configured to get over. Thus, even when the door 200 is rotated in the closing direction by its own weight in the open state of the door 200 indicated by the imaginary line, the locking projection 201 hits the pressing plate 203 so that the door 200 can be held in the open state. it can.

[0003]

However, this door device has a drawback that the opening and closing operation becomes difficult when the spring force of the coil spring 204 is increased, and conversely, when the spring force is weakened, the door 200 tends to fall into a closed state. was there. Therefore, an object of the present invention is to provide a door device that can be easily opened and that is hard to fall down in the opened state.

[0004]

According to the present invention, there is provided a door device having a box having an opening in a vertical plane, and an opening / closing member attached to an upper end of the opening via a horizontal shaft so as to be openable and closable. doors and, mounted side become piece is formed by a substantially U-shaped leaf springs extending outwardly from the other piece the box body having a locking projection
And the extended portion of the piece is located outside the box.
Is the locking projection rides over protrusion when the door opening of the screw attached to the door to the box body extends outside of the box body that includes a locking spring which is bent in the other piece.

[0005]

According to the structure of the present invention, when the door is opened, the locking projection moves from the U-shaped bent portion side of the locking spring to the tip end of the other piece having the projection to get over the projection. Since the other piece having the protrusion can be easily elastically deformed to one side, the door opening operation can be easily performed. In this case, since the locking spring can take elasticity in a long portion from one piece to the other piece, the elasticity can be increased as compared with, for example, simply fixing the opposed piece of the U-shaped spring, and the durability can be improved. Excellent in properties and the like. In the open state in which the locking projection has passed over the projection, the locking projection locks to the projection due to the weight of the door, but the locking projection from the tip side of the other piece having the projection toward the U-shaped bent part side. When trying to get over the protruding portion, a compressive force is applied from the protruding portion to bend the U-shaped bent portion, so that the resistance increases, so that it is difficult for the locking projection to get over the protruding portion. For this reason, the holding strength in the opened state is increased, and the door is less likely to fall down. Therefore, the door can be easily opened and the door is not easily collapsed in the opened state. In particular, extend one piece of the locking spring outside the box.
The screw was attached to the box and removed, so the door was
Easy installation of the locking spring because the side does not get in the way
It becomes easy to assemble.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. That is, the door device of this distribution board is a box 1
, A door 2 and a locking spring 3. The box 1 has an opening for opening and closing the door 2 on a vertical surface. In the embodiment, the opening 5 of the lower box 4 in FIG. 5 is closed with the inner lid 6 as shown in FIG. A door 2 is provided. As shown in FIG. 5 and FIG. 9, the lower box 4 has an inner bottom 7 attached to the inside by screws 15, and a main breaker 8 and a branch breaker 9 attached to the inner bottom 7. Reference numeral 10 denotes an energization display block of the branch breaker 9;
Is a wiring part, 12 is a detachable wiring cover having the wiring part 11, 13 is a conduit, 14 is its nut, and 50 is an electric wire.

The inner lid 6 is attached to attachment holes 18 and locking tongues 17 provided on both sides of the inner bottom base 7 with an attachment 55. As shown in FIG.
8, a recess 70 is formed in the inner lid 6, and a hole 71 corresponding to the mounting hole 18 is formed at the bottom of the recess 70.
A locking hole 72 for locking the locking tongue piece 17 is formed, and the inner lid 6 is temporarily fixed by locking the locking tongue piece 17 into the locking hole 72, and a hook hole 76 is formed on the side wall of the recess 70. doing. The mounting tool 55 includes a horizontal shaft 73 provided in the concave portion 70, a knob 74 extending from the horizontal shaft 73 and located at a position where the concave portion 70 is closed in the mounted state of the concave portion 70, and a knob 74 extending from the back surface of the knob 74. In the mounted state, the front end is locked to the back surface of the midsole base 7 through the mounting hole 18, and the knob 74 is opened as indicated by an imaginary line, so that the locking piece 75 located outside the mounting hole 18.
A hook piece 77 extending from the back surface of the knob 74 and hooking in the hook hole 76 with the knob 74 closed;
And a stopper 78 extending from the rear surface of the concave portion 70 and abutting on the bottom surface of the concave portion 70 in a closed state. The inner cover 6 has a hole 20 for exposing the main breaker 8, the branch breaker 9, and the power-on display block 10, as shown in FIG.

The door 2 has a horizontal shaft 1 at the upper end of the opening of the box 1.
The door 2 of this embodiment is attached to the upper end of the middle door 6 to close the hole 20 of the middle lid 6. A shaft 16 is provided, and a viewing window 21 is formed at the center of the door 2 so that the power supply display block 10 and the handle of the main breaker 8 can be seen. That is, as shown in FIG. 7, a horizontal bearing 23 facing the side wall 22 is provided on the back side of the upper end of the door 2, and horizontal shaft holes 24 and 25 are formed in the horizontal bearing 23 and the side wall 22. A spring bearing / horizontal bearing 26 is provided on the side opposite to the side wall 22 of the horizontal bearing 24, while a concave portion 33 is formed on the inner surface side of the upper end portion of the inner lid 6 so that the rear surface side protrudes (FIG. 1). Provide a bearing 27 and a horizontal bearing 27
A long hole 30 is formed in the side wall 29 facing the hole 28 of FIG. The horizontal shaft 16 forms a spring receiving collar 31 at an intermediate portion. The spring bearing collar 31 is applied to the horizontal bearing 24, the coil spring 32 is passed through the horizontal shaft 16, one end of which is locked to the collar 31, and the other end is locked to the spring bearing / horizontal bearing 26. 16 is passed through the horizontal shaft hole 24 of the horizontal bearing 24 and the horizontal shaft hole 25 of the side wall 22. By moving the horizontal shaft 16 so as to compress the coil spring 32 and positioning the horizontal bearing 27 of the inner lid 6 between the horizontal bearing 23 and the side wall 22 and passing the horizontal shaft 16 through the horizontal shaft hole 28, the door 2 is attached to the inner lid 6.

As shown in FIG. 1, the locking projection 15 of the embodiment faces the recess 33 at the outer edge of the door 2 slightly radially away from the center a of the horizontal axis on both sides of the upper end of the door 2, and It is formed so as to form an arcuate surface in the turning direction, and the turning range accompanying the opening and closing of the door 2 is in the concave portion 33. The locking spring 3 is formed by a substantially U-shaped leaf spring. One piece 36 is fixed to the box 1, and a projection 35 over which the locking projection 15 rides over when the door 2 is opened is bent to another piece 37. ing. 38 is a U-shaped bent portion, 39
Is the tip of the other piece 37. In the embodiment, the mounting portion 41 extends from the one piece 36 via the Z-shaped bent portion 40, and a mounting hole 42 is formed at the tip thereof. One piece 36 contacts the inner surface of the recess 33 and the other piece 37 having the projection 35 is
The mounting portion 41 protrudes from the rear surface through a hole 43 formed on the side surface of the concave portion 33 and is fixed to a screw hole 45 provided in the box body 1 with a screw 44.

According to this embodiment, when the door 2 is opened, the locking projection 15 moves from the U-shaped bent portion 38 of the locking spring 3 to the tip 39 of the other piece 37 having the projection 35. Protruding part 3
5, the other piece 37 having the protrusion 35 can be easily elastically deformed toward the one piece 36, so that the door opening operation can be easily performed. In the open state in which the locking projection 15 has passed over the projection 35, the locking projection 15 is
5, but the tip 39 of the other piece 37 having the projection 35
When the locking projection 15 tries to climb over the protrusion 35 from the side toward the U-shaped bent portion 38, a compressive force is applied to bend the U-shaped bent portion 38 from the protrusion 35, so that a resistance force is applied. Is increased, so that it is difficult for the locking projection 15 to climb over the projection 35. For this reason, the holding strength in the opened state is increased, and the door 2 is less likely to fall down. Therefore, the door 2 can be easily opened, and it is difficult for the door 2 to easily fall down in the opened state.

[0011]

According to the door device of the present invention, when the door is opened, the locking projection moves from the U-shaped bent portion of the locking spring to the tip end of the other piece having the projection to get over the projection. Therefore, the other piece having the projection can be easily elastically deformed to one side, so that the door opening operation can be easily performed. In this case, since the locking spring can take elasticity in a long portion from one piece to the other piece, the elasticity can be increased as compared with, for example, simply fixing the opposed piece of the U-shaped spring, and the durability can be improved. Excellent in properties and the like. In the open state in which the locking projection has passed over the projection, the locking projection locks to the projection due to the weight of the door, but the locking projection from the tip side of the other piece having the projection toward the U-shaped bent part side. When trying to get over the protruding portion, a compressive force is applied from the protruding portion to bend the U-shaped bent portion, so that the resistance increases, so that it is difficult for the locking projection to get over the protruding portion. For this reason, the holding strength in the opened state is increased, and the door is less likely to fall down. Therefore, there is an effect that the door can be easily opened and the door is hard to fall down in the opened state. In particular, one of the locking springs
Since the piece extended outside the box and was screwed to the box,
Locks because the door side does not interfere with the mounting of the stop spring
The installation of the spring is easy and the assembly is easy.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of an embodiment of the present invention in a door open state.

FIG. 2 is a partial cross-sectional view in a door closed state.

FIG. 3 is an external perspective view of a distribution board.

FIG. 4 is a perspective view showing a state where a door is opened.

FIG. 5 is a perspective view showing a state where an inner lid is removed.

FIG. 6 is a partial perspective view of a horizontal shaft portion.

FIG. 7 is an exploded perspective view thereof.

FIG. 8 is a sectional view of a mounting portion of the inner lid.

FIG. 9 is a sectional view of a distribution board in an embedded state.

FIG. 10 is a partial sectional view of a conventional door device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box 2 Door 3 Locking spring 15 Locking projection 16 Horizontal axis 35 Projection 36 One piece 37 Other piece

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02B 1/38 H02B 1/44 H05K 5/03

Claims (1)

(57) [Claims] 1. A box having an opening on a vertical surface, a door having an engaging projection for holding an open state by being openably and closably attached to an upper end of the opening via a horizontal shaft, and a mounting side. One piece is formed by a substantially U-shaped leaf spring that extends outward from the other piece, is disposed in the box, and the extended portion of the one piece is
Extend outside the box to the box outside the box
A door device comprising: a locking spring which is screw-attached and has a projection formed by bending the projection over the locking projection when the door is opened.