JPH0351498Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a locking device, and more particularly to a locking device equipped with a trigger means for holding 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. It is something.

Conventionally, various locking devices with a trigger latch have been devised, but since the trigger latch protrudes when the door is open, the latch may get caught on a person or object, or it may catch on the other door or frame when the door is closed. There is a risk that they will collide with each other and cause damage or damage to each other.

In view of the above, the present invention allows the trigger latch to be operated with a handle in the same way as the locking member, and prevents the trigger latch from protruding when the door is open, so that the trigger latch does not catch people or objects, The aim is to provide a door or frame that will not be damaged or broken.

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 generally 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. The parts 5 and 6 are crimped onto the bottom 9 and the lid 10 of the inner box by means of protrusions extending therefrom, and the lid is also connected to the inner box (FIG. 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, and the ends of the guide pin 11 are caulked to the bottom 12 and lid 13 of the outer box, so that the bottom and the lid are attached to each other. At the same time, the inner box 2 is moved along the guide pins 11 with respect to the outer box 1 (FIGS. 4 and 5). The part 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.
(Fig. 5). The hole 15 in the portion 6 is a threaded hole into which the adjustment screw 14 is screwed, and as the adjustment screw rotates, the inner box 2 is moved relative to the outer case 1. The portion 4 is in the form of a rectangular parallelepiped, and its thickness is approximately equal to the depth of the inner box.
A protrusion 16 extending therefrom is caulked and connected to the bottom 9 and lid 10 of the inner box (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 drive 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 this drive shaft 18 is divided into a large-diameter semicircular portion 21 and a small-diameter semicircular portion 21, and a stepped portion 2 is provided at the connecting portion between the two portions.
3, 23' are formed (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 (unlocked position) and an extended position (locked position) by the drive shaft 18, and is moved to the receiver 28 in the extended position. interlocking door 30,3
1 to each other. This locking member 25 is fitted onto the drive shaft 18 and has approximately 90 degrees of play with respect to the shaft, and as the drive shaft 18 rotates approximately 170 degrees, the lock member 25 is fitted with the drive shaft 18 and has approximately 80 degrees of play as the drive shaft 18 rotates approximately 170 degrees.
When the lever handle 32 is used, it faces downward and upward in its locked and unlocked positions, and does not face sideways, so it does not get in the way.

The lock member 25 is indirectly fitted to the drive 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 thereof, 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.
It is formed of a circular arc portion 37 with a small diameter and a circular arc portion 37' with a small diameter of 1/4, and there are step portions 38 and 38' at the connecting portions thereof (FIGS. 4 and 6). This member 33 is connected to the rotating shaft 1
8, the large diameter arc portion 37,
21 are in contact with each other and can rotate relatively, and the small diameter circular arc portions 37' and 21' engage with each other, and the stepped portion 2
There is a 90 degree play between 3 and 38 or 23' and 38', and due to the engagement of these steps, the drive shaft 18
rotation is transmitted to member 33 (FIG. 4).

The hole 39 of the arm 26 of the lock member 25 is fitted into the outer periphery of the cylindrical part 34, and the hole 40 of the arm 26 is fitted into the protrusion 41 of the arm part 36, thereby locking the lock member 25 and the intermediate member 33.
are connected so that they rotate as a unit. 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 drive shaft 18.

The rotor 42 works together with a trigger latch 43 to lock or unlock the drive shaft 18 in its unlocked position. This rotor 42 is disc-shaped and has a hole 45 in the center formed by a large-diameter semicircular portion 44 and a small-diameter semicircular portion 44', and engages with the locking surface 46 of the trigger latch 43 on the outer periphery. The receiving surface 47 and the cam surface 61 on the driven side of the trigger latch
A driving surface 62 is formed in contact with the driving surface 62 . When the drive shaft 18 is fitted into the hole 45 of the rotor 42, the large diameter arc portions 44, 21 and the small diameter arc portion 4 of both
4' and 21' are brought 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 roughly L-shaped plate parts 50 that face each other and are connected at a back part 51 (sixth plate part 50).
(Fig.), the thin portion 7 of the member 3 is sandwiched between the members 3 and the guide surfaces 52 of the thick portions 5 and 6 of the member 3 are guided from side to side. A protrusion 53 is provided at the lower end of the main body 48, and this protrusion is slidably fitted into a horizontally elongated hole 54 in the inner box 2, thereby allowing the main body to move more smoothly.

A locking surface 46 is formed in the intermediate portion of the main body 48 and engages with a receiving surface 47 of the rotor 42 to prevent rotation of the rotor in its unlocked position, thereby locking the locking member via the drive shaft 18. The driven side cam surface 61 is provided below the locking surface 46 and is pressed against the main driving surface 62 by the biasing force of the spring 58 in the locking direction.
According to the swinging movement of the main driving surface 62, the trigger latch 4
3 in the locking direction and unlocking direction.

The head 49 is inserted between the main bodies 48 and fixed with screws 55. The screw 55 is inserted into the screw hole in the head 49 through the horizontally elongated hole 56 in the main body 48 to fasten the main body to the head (FIG. 5). As a result, the hole 56
The protruding length of the head 49 can be adjusted by the amount of play. head 4
A compression coil spring 58 is provided between the rear end of the trigger latch 9 and the bottom of the hole 63 of the member 3, and the spring biases the main body 48 of the trigger latch 43 to the left (locking direction).

The trigger latch 43 has the above-described structure, so that when the handle 32 is in the unlocked position regardless of whether the door is opened or closed, the cam surface 61 on the driven side of the trigger latch resists the spring 58 with the driving surface 62 of the rotor 42. The head 49 is pressed against the armour plate 5.
It is held in the unlocked position pulled in from 9.
(Fig. 1) In the closed state, as the handle 32 rotates from the unlocked position to the locking direction, the trigger latch 43 moves from the unlocked position to the locking direction while following the rotor 42. 49 and the other person's door 3
1 is held in the unlocked state by contact with the 1st
figure).

The locking member 25 is then rotated to the extended locking position and engaged with the receiver 28 (FIG. 2). When the locking member 25 is unlocked, the trigger latch 43 is held in the unlocked position by the rotor 42, and the door can be opened and closed with the head 49 retracted (FIG. 1).

When the door is open, even if the handle 32 is rotated from the locked position in the unlocking direction by mistake or mischief, the rotor 42 will become independent from the locking member 25 within the range of rotational play of the drive shaft 18 with respect to the locking member 25. The trigger latch 43 moves in the locking direction following the rotor 42, and its locking surface 46 engages with the receiving surface 47 of the rotor (FIG. 3).

Therefore, the locking member 25 is held in the retracted and unlocked position, and there is no risk of it hitting the other door when closing the door.

In the present invention, when the handle 32 is in the open position, the active surface 62 of the rotor 42 engages with the cam surface 61 of the trigger latch 43 and pushes the cam surface, so that the trigger latch is used to open and close the door. It is held in the retracted position regardless of the trigger latch, and there is no risk of catching people or objects on the trigger latch or damaging the other party's door or frame. Further, in the present invention, the handle 32 and the rotor 42 rotate together, and there is rotational play with respect to the locking member 25, and when the handle is rotated from the open position to the closed position within the range of the play, the rotor 42 rotates as a unit. The locking surface 46 of the trigger latch 43 engages with the receiving surface 47 of the trigger latch 42 to prevent rotation of the rotor 25, so even if the handle is operated by mistake or mischief when the door is open, the locking member will not release the trigger latch when it is pulled in. It is held in the locked position and there is no risk of the lock member, door or frame being broken.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIGS. 1 to 4 are cross-sectional views showing the operating state, and FIG.
6 is a sectional view taken along the - line in FIG. 1. 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 drive shaft, 20 is a handle shaft, 25 is a lock 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 is a locking surface, 47 is a receiving surface, 48
49 is a head, 55 is a screw, 58 is a compression coil spring, 59 is an armor plate, 61 is a cam surface, and 62 is a driving surface.

Claims (1)

[Scope of utility model registration request] A lock member, a drive shaft that swings the lock member between a locked position and an unlocked position, a handle that swings the drive shaft together, a rotor that rotates together with the drive shaft, and the rotation A trigger latch is provided that locks the child when the door is open and restrains the lock member in the unlocked position, and conversely releases the lock when the door is closed so that the lock member can be locked. The rotor is biased in a direction to lock the rotor and has a locking surface and a cam surface, and the rotor has a receiving surface and a cam surface of the trigger latch that engages with the locking surface of the trigger latch to restrain the locking member in the unlocked position. The driving shaft has a driving surface that engages with the trigger latch to restrain the trigger latch in a position where its head is retracted, and the drive shaft has rotational play with respect to the locking member, and the range of the play corresponds to the open position of the handle. When the main drive surface of the rotor is in the position where the head of the trigger latch can be retracted through the cam surface of the trigger latch, and when the drive shaft is in the position corresponding to the intermediate position between opening and closing of the handle, the main drive surface of the rotor is on the surface of the rotor. A locking device defined as having an opposite end with which the locking surface of the trigger latch engages to restrain the locking member in an unlocked position.