JPH0230608Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a locking device for an opening/closing door.

[Conventional technology]

FIG. 1 is a perspective view showing a conventional door locking device, FIG. 2 is a side sectional view showing details of the main part of FIG. 1, and FIG. 3 is a front view of FIG. 2. In Figures 1 to 3, the distribution box 1 is the circuit liner and the disconnector 2.
It is intended to store. The lid 3 covers the opening of the distribution box 1 and includes an opening 301 that exposes the operating handle of the circuit and disconnector 2, and an edge 302 that is a wall near the opening 301 is stepped. It is depressed inside from the outer surface of the lid 3 and has a through hole 30.
It has 3. The door 4 has an opening 301 and an edge 30
2, one end of which is supported by the lid 3 so as to be openable and closable, and a through hole 401 corresponding to the through hole 303 is provided at the other end. The locking member 5 has a substantially L-shape, and one side 501 of the L-shape is connected to the door 4.
The other side 5 of the L-shape is attached to the outer surface of the
03 is inserted into the through holes 401 and 303, and is provided with a half-moon-shaped curved portion 504 that is curved outward so as to be engaged with the inner corner of the end surface of the through hole 303.
Both ends 601 and 602 of the handle 6 are curved parts 50
2 and the outer surface of the door 4, and is operated when the door 4 is opened or closed. The tightening screw 7 is used to attach the lid 3 to the distribution box 1. The through hole 8 is provided in the side wall of the distribution box 1, and is used to lead the connection conductor of the circuit breaker 2 to the outside.

Next, this operation will be explained. To close the door 4 from the open state shown in FIG. 1, the door 4 is first rotated counterclockwise in FIG.
This rotation causes the other side 50 of the L-shape of the locking member 5 to
3 is inserted into the through hole 303 of the lid 3, and the curved part 5
04 comes into contact with the end surface of the through hole 303. When the door 4 is further pressurized in this state, the other side 5 of the locking member 5
03 is curved inward using the L-shaped corner as a fulcrum,
The curved portion 504 is inserted through the through hole 303 as shown in FIG.
4 is engaged with the inner corner of the end surface of the through hole 303.

[The problem that the idea aims to solve]

However, since the conventional device is configured as described above, if the mounting position of the locking member 5 is shifted, the following problems occur. That is, when closing the door 4, as described above, the other side 5 of the L-shape of the locking member 5
03 is curved inward using the L-shaped corner as a fulcrum,
When the door 4 is closed, the other side 5 of the L-shape of the locking member 5
03 recovers to its original state due to its own elasticity,
As shown in FIG. 2, the curved portion 504 and the through hole 303
A spacing h is formed between the end faces of. If the mounting position of the locking member 5 shifts to the left in FIG.
becomes larger, and the stress acting on the L-shaped corner of the locking member 5 when the door 4 is opened and closed becomes larger. If this stress exceeds the elastic limit, the locking member 5 will not return to its original shape, the curved portion 504 will no longer lock to the inner corner of the end face of the through hole 303, and furthermore, excessive stress will be applied each time the door 4 is opened and closed. As a result, the locking member 5 becomes fatigued and the L-shaped corner of the locking member 5 breaks. On the other hand, if the mounting position of the locking member 5 is shifted to the right in FIG. 2, the distance h becomes smaller, resulting in the drawback that the door 4 cannot be locked.

[Means to solve the problem]

A locking device for an opening/closing door according to this invention includes: a box having an opening and a through hole provided in a wall near the opening; A door is provided with a through hole corresponding to the through hole, and a flat plate made of an elastic material is provided with an H-shaped through groove and a notch parallel to the two vertical grooves, the H-shaped through groove, at both ends thereof. , bend the H-shaped through-groove so that its cross section becomes U-shaped around the horizontal groove, and bring both ends close to each other in order to penetrate and insert into the respective through-holes of the box and the door. The tips of the pair of central portions of the flat plate divided into two by the horizontal groove and the two vertical grooves of the H-shaped through groove are respectively bent inward and pushed apart from each other. , a locking member attached so that both end surfaces of each of the notches engage with end surfaces of the through hole of the door.

[Effect]

Since the distal end and the distal end of the central portion of the locking member are each curved inwardly, insertion into and withdrawal from the through hole of the box can be performed smoothly. Furthermore, since the center portions are pushed apart from each other, the door will not open accidentally when the door is closed.

〔Example〕

This invention was made in order to eliminate the drawbacks of the conventional ones as described above. An embodiment of this invention will be described below with reference to the drawings.

FIG. 4 is a side sectional view showing an embodiment of the main part of the locking device for an opening/closing door according to this invention, and FIG.
6 is a perspective view of the locking member shown in FIGS. 4 and 5, and FIG. 7 is a plan view of a flat plate constituting the locking member shown in FIG. 6. In each figure, the same parts as in FIGS. 1 to 3 are designated by the same reference numerals. 4 to 7, a flat plate 9 made of an elastic body shown in FIG. 7 has two parallel vertical grooves 9.
a, 9b and a horizontal groove 9c provided between the vertical grooves 9a, 9b. As shown in FIG. 4 or 6, the cross section is approximately U with the horizontal groove 9c as the center.
It is bent into a letter shape and constitutes a locking member 9A shown in FIG. Both tips 9B and 9C of the locking member 9A are curved so as to approach each other inward, and are inserted into the through hole 401 of the door 4, and when the door 4 is closed, the ends 9B and 9C of the locking member 9A are inserted into the through hole 303 of the edge 302 of the lid 3. It is inserted first as a guide for the locking member 9A. A pair of central portions 9D and 9E are H-shaped through grooves 9.
It is divided into two by a horizontal groove 9c and two vertical grooves 9a and 9b, and the tips of each are curved inward and pushed outward to separate from each other, so that when the door 4 is closed, it penetrates. It is engaged with the inner corner of the end face of the hole 303. The bent portions 9F and 9G of the locking member 9A are inserted into the space formed between the bent portions 9F and 9G of the locking member 9A, and the both ends 601 and 602 of the handle 6.
is inserted.

Next, this operation will be explained. When the door 4 is brought close to the lid 3, both tips 9B and 9C first touch the edge 30 of the lid 3.
2 into the through holes 303 of the pair of central portions 9
It serves as an insertion guide for D and 9E, and the pair of central parts 9
The outer surfaces of D and 9E contact the end surface of the through hole 303. When the door 4 is further pressurized in this state, the pair of central portions 9D and 9E move toward the center, and finally the outermost portions of the pair of central portions 9D and 9E pass through the through hole 303, and the pair of central portions 9D and 9E move toward the center. central part 9D, 9E
tries to return to its original state due to its elasticity, resulting in the state shown in FIG.

[Effect of idea]

This idea is structured as above, so
The pair of central portions 9D, 9E can be smoothly inserted into the through hole 303 by the guidance of both tip portions 9B, 9C. Further, after the locking of the locking member 9A is completed, as shown in FIG.
are spread evenly on the left and right sides and securely locked. Furthermore, even if the locking member 9A is attached to the door 4 shifted to the left or right in FIG.
Either D or 9E can be engaged with the inner corner of the end face of the through hole 303, thereby allowing the door 4 to be engaged. Therefore, the mounting accuracy of the locking member 9A does not need to be as high as in the past, and the work of installing the locking member 9A becomes easier. Also, in this case, the stress applied to either of the pair of central portions 9D, 9E increases, but since the pair of central portions 9D, 9E are not bent significantly like the conventional L-shaped corners, Will not break.

As described above, this invention has various effects such as smooth and reliable locking, easy installation work, and improved reliability.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing a conventional door locking device, Figure 2 is a side sectional view showing details of the main parts of Figure 1, Figure 3 is a front view of Figure 2, and Figure 4. 5 is a side sectional view showing an embodiment of the main part of the locking device for an opening/closing door according to this invention, FIG. 5 is a front view of FIG. 4, and FIG.
The figure is a perspective view of the locking member shown in FIGS. 4 and 5,
7 is a plan view of a flat plate constituting the locking member of FIG. 6. FIG. In the figures, the same parts in each figure are given the same symbols, 1 is the distribution box, 3 is the lid, 301 is the opening, 302 is the edge, 303 is the through hole, 4 is the door, 4
01 is a through hole, 6 is a handle, 601, 602 are both ends, 9 is a flat plate, 9a, 9b are vertical grooves, 9c is a horizontal groove, 901 is an H-shaped through groove, 902, 903
9A is a notch, 9A is a locking member, 9B and 9C are tip portions, 9D and 9E are a pair of center portions, and 9F and 9G are bent portions.

Claims (1)

[Claims for Utility Model Registration] (1) A box having an opening and a through hole provided in the wall near the opening, one end of which is pivotally supported by the box, and the through hole provided at the other end. A door is provided with a through hole corresponding to the hole, and a flat plate made of an elastic material is provided with an H-shaped through groove and a notch parallel to the two vertical grooves on both sides of the H-shaped through groove. Bend the horizontal groove of the H-shaped through-groove so that the cross section becomes U-shaped, and bring both ends close to each other in order to penetrate and insert it into the respective through-holes of the box and the door. Curve inward, and bend the tips of the pair of central portions of the flat plate divided into two by the horizontal groove and the two vertical grooves of the H-shaped through groove, respectively, and push them outward so as to separate them from each other. A locking device for an opening/closing door, comprising: a locking member installed so that the two end faces of each of the notches are engaged with the end faces of the through hole of the door. (2) The locking device for an opening/closing door according to claim 1, which is a utility model, and includes a handle whose end is inserted between the bent portion of the locking member and the outer surface of the door.