JP6736219B2 - Locking device - Google Patents

Description

The present invention relates to a locking device.

As described in Patent Document 1, there is known an electrical equipment storage box including a locking device including a support fitting having a passage hole for sliding a locking rod on the back surface of a door. In this electrical equipment storage box, when the lock bar is slid on the support metal by operating the handle and moved to a position where the lock bar and the case can contact, the door closes the opening of the box body. It is possible to maintain the state. If such a configuration is adopted, even when a relatively strong force is applied to the door due to a typhoon or the like, the tip of the locking rod abuts the housing, and the door can be maintained in the closed state.

Japanese Patent No. 4693100

However, when the door is pulled, the end of the passage hole comes into contact with the locking portion, so that the load concentrates on the locking rod. Therefore, there is a possibility that the lock bar may be damaged.

The inventor of the present case has tried to solve the problem by diligently examining this point. An object of the present invention is to suppress the deformation of the lock bar due to an external force.

In order to solve the above problems, the following means are adopted. A first means is a locking device provided with a locking rod that moves up and down by operating a handle provided on the door, and a support fitting having an arm portion having a passage hole through which the locking rod passes. The locking device is formed by bending the flange portion that comes into surface contact with the locking rod so that the front end portion of the arm portion is parallel to the door.

In the first means, it is preferable that the passage hole portion is formed so as to extend from the arm portion to the flange portion.

In the first means, the support fitting is formed in a substantially U-shape, and the other arm part of the arm part having the passage hole part is provided with a restricting part for restricting the bending of the lock bar. Is preferred.

Further, it is preferable that the restricting portion is located closer to the door than the flange portion and is configured to contact the restricting portion after contacting the flange portion when the locking rod bends.

According to the present invention, it is possible to suppress the deformation of the lock bar due to an external force.

It is a perspective view of the box for electrical equipment storage provided with the locking device of an embodiment. However, both doors are open. It is a perspective view of the box for electrical equipment storage which closed the door of one side. It is a partially expanded view of the III area|region of FIG. FIG. 3 is a perspective view of the electrical device storage box viewed from a direction different from FIG. 2. FIG. 5 is a partially enlarged view of a V area in FIG. 4. FIG. 5 is a partially enlarged view of the VI area in FIG. 4. It is sectional drawing which showed the state which regulated the movement of the door. It is sectional drawing which showed the state in which the movement of the door is not regulated. It is a figure showing the relationship between a lock bar and a support metal fitting when a force is applied to open the door in a state where the movement of the door is restricted. FIG. 10 is a diagram showing the relationship between the lock bar and the support fitting when the door is further pulled in the opening direction from the state shown in FIG. 9. It is a figure showing the state before attaching a resin cover to a rod stick seen from the side. FIG. 12 is a diagram illustrating a state in which the resin cover is linearly moved with respect to the rod bar from the state of FIG. 11. It is a figure showing the state after rotating the resin cover from the state of FIG.

Modes for carrying out the invention will be shown below. First, the electrical equipment storage box 3 in which the locking device 1 is incorporated will be described. As shown in FIG. 1, the electrical device storage box 3 includes a box body 31 having an opening, and two doors 32 used to cover the opening of the box body 31. A drainer 36 is provided around the opening of the box body 31 to prevent water from entering the box body 31 from the outside. As a result, it is possible to prevent the equipment attached to the equipment mounting plate 39 arranged in the box body 31 from being exposed to water. The door 32 is provided with a handle 33 used when opening and closing. Further, the lock bar 4 which is movable by operating the handle 33 is connected to the handle 33. Further, a support fitting 5 for supporting the lock bar 4 is provided on the back side of the door 32.

In the present embodiment, the electric equipment storage box 3 that can be opened and closed is shown in FIG. 2 with the door 32 on one side closed. As can be seen from FIG. 3, which is a partially enlarged view of the region III in FIG. 2, when the door 32 on one side is closed, the draining portion 36 of the box body 31 and the packing 35 come into contact with each other. A drain metal fitting 34 is provided around the tip of the packing 35, and a concave portion 37 is provided closer to the center than the water drain metal fitting 34. When the handle 33 of the door 32 on the other side is operated, the tongue 43 can also be moved and locked on the back side of the recess 37.

FIG. 4 is a perspective view of the electrical device storage box 3 in the state shown in FIG. 2 as seen from a different direction. FIG. 5 is a partially enlarged view of the area V in FIG. Although the lock bar 4 is provided on the back surface of the door 32, the lock bar 4 can be moved up and down by operating the handle 33 provided on the door 32. As shown in FIG. 5, the support fitting 5 provided on the back surface of the door 32 has an arm portion having a passage hole portion 52 through which the locking rod 4 passes. Further, by bending the distal end of the arm portion in the central direction so as to be parallel to the door 32, a flange portion 53 that makes surface contact with the lock bar 4 is formed in the central direction of the door, that is, toward the handle 33. There is. In the locking device 1 configured in this manner, when the locking rod 4 restricts the movement of the door 32 and the door 32 is pulled, the locking rod 4 faces the flange portion 53 of the support fitting 5. You will come into contact. Therefore, it is possible to suppress the deformation of the lock bar 4 due to the external force.

FIG. 6 is a partially enlarged view of the VI area in FIG. Since the direction of the tip of the lock bar 4 is upside down from the position shown in FIG. 5, the mounting method of the support fitting 5 is also upside down. The tip of the arm portion of the support fitting 5 also forms a flange portion 53 bent in the central direction of the door 32, and the upper and lower locking rods 4 contact the flange portion 53 of the support fitting 5.

The passage hole portion 52 of the present embodiment is formed so as to extend over the flange portion 53. For this reason, the contact points at the corners of the end portions can be reduced, and the flange portion 53 hits the locking rod 4 instead of the inner surface of the passage hole portion 52. As a result, the lock bar 4 is prevented from being damaged or the like, and the resistance at the corners is eliminated, so that the lock bar 4 can slide smoothly.

By operating the handle 33, if the tip end side portion of the lock bar 4 is arranged at the position shown in FIG. 7, it is possible to restrict the movement of the door 32 in the opening direction. Further, if the tip end side portion of the lock bar 4 is arranged at a position as shown in FIG. 8, this restriction is released and the door 32 is opened.

By the way, the support fitting 5 of this embodiment is formed in a substantially U-shape. The support fitting 5 is provided with arms that extend in a substantially right angle direction from both ends of a mounting portion 55 that is fixed so as to face the door 32. One arm of the support fitting 5 is provided with a passage hole 52 for the lock bar 4, and a flange 53 is formed at the end. The flange portion 53 has a flange side that is bent vertically toward the center of the door 32. When the arms are bent as in the present embodiment, the open end is located on the fulcrum side of the lock bar 4, and the lock bar 4 hits the base end of the flange 53, so that a strong force is applied to the door 32. Even in such a case, the open end side of the flange portion 53 is not easily deformed, and the lock bar 4 can be held with strength. It should be noted that, by adopting the configuration including the flange portion 53 like the support fitting 5 of the present embodiment, it is not necessary to extend the arm portion in order to have the strength in the vicinity of the passage hole portion 52. It is possible to secure an effective installation space for electric devices and the like in the box 3.

A restricting portion 54 that restricts the bending of the lock bar 4 is formed on the other arm of the support fitting 5. The restriction portion 54 is a portion that acts when the door 32 is pulled in the closed state, and in this case, is a portion that abuts and supports the locking rod 4. If such a configuration is adopted, when the door 32 is pulled, the locking rod 4 is supported by the flange portion 53 and the regulating portion 54 at two points. Therefore, it is possible to prevent the lock bar 4 from bending and prevent the door 32 from opening.

When the locking rod 4 bends and comes into contact with the flange portion 53 and the restricting portion 54, the locking rod 4 comes into contact with the front surface side and the rear surface side of the locking rod 4 so as to sandwich the different surface sides. The lock bar 4 is prevented from being deformed and the door 32 is prevented from being opened. Further, the restricting portion 54 is located on the door side of the flange portion 53, that is, on the rear surface side of the door 32, and the contact with the lock bar 4 is performed in order from the flange portion 53 to the restricting portion 54. Therefore, when the force to open the door 32 is weak, it is supported by the flange portion 53 as shown in FIG. 9, and when a stronger force is applied, as shown in FIG. Will come into contact. Therefore, it is possible to effectively prevent the lock bar 4 from being deformed.

In the lock bar 4 of this embodiment, a resin cover 42 is attached to the tip of a metal rod bar 41. Therefore, when the locking rod 4 slides, the resin cover 42 can suppress the friction generated between the box body 31 and the support fitting 5. Therefore, the lock bar 4 can be slid smoothly.

The locking rod 4 of the present embodiment has a crank-shaped tip. For this reason, it becomes possible to support it on the back surface of the water draining portion 36 of the box body portion 31 and to give the locking rod 4 strength. Further, the crank-shaped portion is a portion that is sandwiched by the sandwiching portion 46 of the resin cover 42 in the vertical direction. Therefore, even if the lock bar 4 slides by operating the handle 33, the resin cover 42 can be prevented from falling off.

The resin cover 42 of the present embodiment includes a linear portion 44 formed in a linear shape, and a curved portion 45 formed with an angle different from one end of the linear portion 44. With such a configuration, in the locked state, the linear portion 44 is configured to be able to contact both the back surface of the draining portion 36 of the box body 31 and the support fitting 5.

The curved portion 45 of the resin cover 42 has a shape corresponding to a crank-shaped portion provided at the tip of the rod rod 41. Therefore, the curved portion 45 can be engaged with the crank-shaped portion of the rod rod 41. The resin cover 42 of the present embodiment is formed in a substantially cylindrical shape. At one end of the resin cover 42, an insertion portion 47 opened to insert the rod 41 is formed. Further, the bending portion 45 is provided with a pinching portion 46 adjacent to the insertion portion 47. The pinching portion 46 is partially elastically deformable, and the pinching portion 46 is deformed when the resin cover 42 is attached to the rod rod 41. When the mounting of the resin cover 42 is completed, the pinching portion 46 returns from the deformed state to the original state by the elastic force. Therefore, the curved portion 45 becomes entangled around the rod rod 41, and the resin cover 42 is fixed to the rod rod 41.

In the normal state, the restricting portion 54 and the lock bar 4 do not come into contact with each other. Therefore, the resin cover 42 of the lock bar 4 extends downward from the flange portion 53, but does not extend to the restriction portion 54.

Next, a procedure for attaching the resin cover 42 to the rod bar 41 will be described. FIG. 11 is a side view of the state before the resin cover 42 is attached to the rod bar 41. FIG. 12 is a diagram showing a state in which the resin cover 42 is moved straight from the state of FIG. 11 with respect to the rod bar 41. First, as shown in FIG. 11, the rod rod 41 formed in a straight line is arranged in parallel so that the longitudinal direction of the tip end and the longitudinal direction of the resin cover 42 are oriented in the same direction. After that, the resin cover 42 is moved straight to cover the rod rod 41. Then, the state shown in FIG. 12 is obtained. Next, when the resin cover 42 is rotated along the rod rod 41 by about 90 degrees from the state shown in FIG. 12, the resin cover 42 is fixed as shown in FIG. At this time, the clamping portion 46 clamps the crank-shaped portion from above and below.

Although the embodiment has been described above centering on one example, the present invention is not limited to the above-described embodiment, and various modes are possible. For example, the lock bar does not have to come into contact with the inner surface of the box body of the water draining part. For example, a lock bar fixing member may be formed on the box body.

Further, the number of doors of the electrical equipment storage box is not limited, and the locking device can be applied to the electrical equipment storage box provided with only one door.

1 Locking Device 4 Locking Rod 5 Supporting Metal Fitting 32 Door 33 Handle 52 Passage Hole 53 Flange 54 Restriction

Claims (4)

A lock bar that moves up and down by operating the handle provided on the door,
A support metal fitting having an arm portion having a passage hole portion through which a locking rod passes,
A locking device comprising:
A locking device that is formed by bending a flange portion that comes into contact with a locking rod so that the tip of the arm portion is parallel to the door. The locking device according to claim 1, wherein the passage hole portion is formed so as to extend from the arm portion to the flange portion. The support fitting is formed in a substantially U shape,
The locking device according to claim 1 or 2, wherein a restricting portion that restricts the bending of the locking rod is provided on the other arm of the arm having the passage hole. The locking device according to claim 3, wherein the restricting portion is located closer to the door than the flange portion, and contacts the restricting portion after contacting the flange portion when the locking rod bends.