JPH0412950Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a locking device, and more particularly to a locking device that restrains a locking member for locking a door in a retracted position so that it cannot be ejected when a doorway or a window door is open.

Conventionally, a locking device has been devised in which the lock member is restrained in its retracted position so that it cannot be ejected when the door is open, and the lock member is prevented from hitting the other door or door frame when the door is closed. However, the structure was complicated and assembly and installation were troublesome.

Therefore, the present invention has a simple structure and is easy to assemble and install by restraining the lock member so that it cannot be ejected using a trigger means that is activated by contact with a contact surface such as a mating door or door frame. It is an object of the present invention to provide a device that is easy to use and also allows the locking member to be restrained and the restraint released to be performed reliably.

Examples of the present invention will be described below.

The lock box has a double structure of an outer box 1 and an inner box 2, and there is not much difference in the outer circumferential dimensions of the two boxes, and the inner box 2 fits snugly into the outer box 1. There is a difference in the thickness of the outer box 1 and the inner box 2, and the inner box 2 can move within the outer box 1 in the thickness direction.

For its movement, members 3 and 4 are installed in the upper and lower parts of the inner box 2 (FIG. 4). The member 3 is approximately U-shaped and has portions 5 and 6 having a thickness approximately equal to the depth of the inner box 2 and a thinner portion 7. Portions 5 and 6 have protrusions 8 extending therefrom.
The bottom 9 and lid 10 of the inner box are crimped to connect the lid to the inner box (Figure 5). A guide pin 11 is passed through the hole in the part 5, the bottom 9 of the inner box, and the lid 10,
Both ends of the guide pin 11 are caulked to the bottom 12 and lid 13 of the outer box to connect these bottoms and the lid to each other, and the inner box 2 is moved relative to the outer box 1 along the guide pin 11 (first step). Figures 4 and 5). The portion 6, the bottom 9 of the inner box, and the lid 10 have their holes penetrated by adjustment screws 14, and both ends of the screws 14 are connected to the bottom 12 of the outer box and the lid 13 in a rotatable manner (fifth figure).
The hole 15 of the portion 6 is a screw hole and is threadedly engaged with the adjustment screw 14, and the inner box 2 is moved relative to the outer box 1 as the adjustment screw rotates. The member 4 has a rectangular shape, and its thickness is approximately equal to the depth of the inner box.
A protrusion 16 extending therefrom is caulked to the bottom 9 and lid 10 of the inner box to connect them to each other (FIGS. 4 and 5).
A guide pin 17 is passed through the holes of the member 4, the bottom 9 of the inner box, and the lid 10, and both ends of the pin are inserted into the bottom 1 of the outer box.
2 and the lid 13 (Figs. 4 and 5).
figure). As a result, the lower part of the inner box 2 is also moved along the guide pin 17 in the same way as the upper part.

The rotating shaft 18 passes through the inner box 2, and its both ends are rotatably attached to the bottom 12 and lid 13 of the outer box 1 (Fig. 5), and the handle shaft 20 in the square hole 19 in the center It is rotated (Fig. 6). The outer periphery of the rotating shaft 18 is divided into a large diameter semicircular portion 21 and a small diameter semicircular portion 21', and step portions 23 and 24 are formed at the connecting portions of both portions (FIG. 4).

The locking member 25 has an arm 26 and a protrusion 27 erected at the tip thereof, and is swung between a retracted position and an extended position by a rotating shaft 18, and is engaged with a receiver 28 in the extended position to lock the doors 30 and 31 together. Attract. The locking member 25 is fitted onto the rotating shaft 18, has a play of approximately 90 degrees with respect to the shaft, and rotates approximately 80 degrees as the rotating shaft 18 rotates approximately 170 degrees. When in use, the handle does not get in the way as it faces downwards upwards and not laterally in its locked and unlocked positions.

The lock member 25 is indirectly fitted to the rotating shaft 18 via the intermediate member 33 as follows. The intermediate member 33 has a cylindrical part 34, a flange part 35 formed on the end face of the flange part 35, and an arm part 36 extending radially from a part of the flange part 34, and the inner peripheral surface of the cylindrical part 34 has a large diameter of 3/4.
A circular arc portion 37 with a small diameter and a 1/4 circular arc portion 37' with a small diameter are formed, and there is a stepped portion 38 at the connection part (7th
figure). When this member 33 is fitted to the rotating shaft 18,
Both large diameter arcuate portions 37, 21 can contact each other and rotate relative to each other, and the small diameter arcuate portions 37', 2
1' are engaged with each other, there is a play of 90 degrees between the stepped portions 23, 24, and 38, and the rotation of the rotating shaft 18 is transmitted to the member 33 by the engagement of the stepped portions. Cylindrical part 3
The hole 39 of the arm 26 of the lock member 25 is fitted to the outer periphery of the lock member 4, and the hole 40 of the arm 26 is fitted to the protrusion 41 of the arm portion 36, so that the lock member 25 and the intermediate member 33 are rotated integrally. It is combined like this. Of course, the hole 39 of the arm 26 may be formed in the same manner as the hole of the member 33, and the arm 26 may be directly fitted onto the rotating shaft 18, or the play may be omitted and the arm 26 may be fixed firmly.

The rotor 42 works together with a trigger latch 43 to lock the rotating shaft 18 in the unlocked position. This rotor 42 is disc-shaped and has a hole 45 in the center formed by a large diameter semicircular part 44 and a small diameter semicircular part 44', and a trigger latch 43 on the outer periphery.
A hooking portion 47 is formed that meshes with the hooking portion 46 of. When the rotary shaft 18 is fitted into the hole 45 of the rotor 42, the large-diameter arc portions 44, 21 and the small-diameter arc portions 44', 21' come into contact with each other and are integrally coupled.

Trigger latch 43 includes a body 48 and a head 49. The main body 48 has two approximately L-shaped plate portions 50.
They face each other and are connected at a back portion 51 (FIG. 7), sandwiching the thin wall portion 7 of the member 3 and guided from side to side along the guide surfaces 52 of the thick wall portions 5 and 6 of the member 3. Ru. There is a protrusion 53 in the middle of the main body 48, and this protrusion is slidably fitted into a horizontally elongated hole 56 in the inner box 2, so that the main body can be moved more smoothly. A hook-shaped engaging part 46 is formed at the lower end of the main body 48, and the engaging part 46 engages with the engaging part 47 of the rotor 42 when the locking member 25 is in the retracted state to prevent the locking member from protruding. The head 49 is inserted between the main bodies 48 and fixed with screws 55. The screw 55 is attached to the main body 4
8 through the horizontally elongated hole 54 into the screw hole of the head 49 and tighten the main body to the head (FIG. 5). Thereby, the protruding length of the head 49 can be adjusted by the amount of play in the hole 56. A compression coil spring 58 is provided between the rear end of the head 49 and the wall 57 of the inner box 2, and the spring urges the main body 48 of the trigger latch 43 to the left. Therefore, when the door is open (Fig. 3), head 4
9 protrudes from the armor plate 59 and connects to the main body 48.
The engaging portion 46 of the rotor 42 engages with the engaging portion 47 of the rotor 42 to hold the locking member 25 in the retracted position. In addition, when the door is closed (FIGS. 1 and 2), the head 49 is pushed in by the door 31, and the engaging portion 46 of the main body 48 is disengaged from the engaging portion 47 of the rotor 42, causing the locking member 25 to be in the protruding position. Can be rotated.

The lock member 25 may be a latch, a sickle lock, or the like in addition to a pull type. The door 30 is also applied to a sliding door that moves left and right or up and down, or an opening door that rotates around an axis.
In the case of a sliding door, the tip of the head is slanted so that it automatically retracts as the door closes, and in the case of an open door, even if the tip of the head is flat, it automatically hits the other party's holder. pushed into.

As described above, in the present invention, when the door is open, the head 49 of the trigger latch 43 is released from the contact surface such as the other door or the door frame and automatically protrudes, and the engaging portion 49 of the trigger latch is engaged with the engaging portion 47 of the rotor 42 fixed to the rotating shaft 18 on the drive side, and this engagement restrains the locking member 25 in the retracted unlocked position. When it comes into contact with a contact surface such as the door frame side and is pushed in the retracting direction, the engaging part 46 of the trigger latch is released from engagement with the engaging part 47 of the rotor, making it possible to lock and unlock the locking member. With this structure, the structure is simple, assembly and installation are easy, and the lock member can be restrained and released easily and reliably.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIGS. 1 to 4 are cross-sectional views showing the operating state, and FIG.
A line sectional view, FIG. 6 is a - line sectional view of FIG. 1,
FIG. 7 is an exploded perspective view. In the figure, 1 is an outer box, 2 is an inner box, 10 is a lid, 11 is a guide pin, 13 is a lid, 14 is an adjustment screw, 17 is a guide pin, 18 is a rotating shaft, 20 is a handle shaft, 25 is a locking member, 26 is the arm, 27 is the protrusion, 28 is the receiver, 3
0 and 31 are doors, 32 is a lever handle, 33 is an intermediate member, 41 is a protrusion, 42 is a rotor, 43 is a trigger latch, 46 and 47 are engaging parts, 48 is a main body,
49 is a head, 55 is a screw, 58 is a compression coil spring,
59 is an armor plate.

Claims (1)

[Scope of utility model registration request] A locking member, a rotating shaft for reciprocating the locking member between a locked position and an unlocked position, a rotor fixed to the rotating shaft and provided with an engaging portion for preventing rotation of the rotor, and a protruding direction. and a head that is movable in the retracting direction and an engaging part that engages with the engaging part of the rotor to prevent rotation of the rotor, and that is always in the direction of engagement between the protruding direction of the head and the engaging part of the rotor. The head of the trigger latch is provided with an energized trigger latch, and when the door is open, the head of the trigger latch is released from contact with a contact surface such as the other door or door frame, and automatically protrudes to close the trigger latch. The engaging part of the rotor is engaged with the engaging part of the rotor, and the engagement restrains the lock member in the retracted unlocked position. A locking device that is set in a relationship such that when pushed in the retracting direction, the engaging portion of the trigger latch is disengaged from the engaging portion of the rotor, thereby enabling locking and unlocking of the locking member.