JPH0324780Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatically lockable casement window fastener.

Latch bolts are often used to close conventional casement windows, but because the latch of a latch bolt can be retracted, the door must be held down by hand to open the door, making it difficult to operate. Further, there is a drawback that the fasteners are large and the frame or door fitting portion is large.

The present invention aims to solve the problems of the conventional casement window. That is, as described below, the fastener of the present invention is rotatable around a rotation shaft 2b fixed to the surface of the pedestal 1, has an engaging recess 2a at one end,
a lock plate 2 with a locking pin 5 protruding thereon; a lock plate 2 bored into the pedestal 1 into which the locking pin 5 is fitted;
An arcuate hole 7 centered on the rotation axis 2b, a spring receiving bent portion 3b, an inclined wall 3c that protrudes and retracts from the arcuate hole 7, and a locking bent portion that protrudes and retracts from the arcuate hole 7. 3a, a movable plate 3 having an unlocking operation part 3d, and a spring receiver 4 at the free end of a return spring fixed to the base 1.
The return spring 9 inserted between the spring receiver bent portion 3b and the spring receiver 4 at the free end of the return spring, and the locking pin 5 wound around the spring receiver pin 10 of the base 1 are inserted into the arc-shaped hole. It consists of an unlocking spring 6 that presses against one end of the lock pin 7, and a lock pin p that is implanted in the mating member.

By coming up with the above-mentioned structure, the inventive fastening metal fitting locks the lock plate 2 when the door is opened and unlocked.
is inclined with respect to the pedestal 1, and when the door is closed, the engaging recess 2a collides with the locking pin p implanted in the mating member and rotates in the locking direction, so that the locking pin 5 locks the inclined wall 3c. The movable plate 3 moves in the locking direction by sliding and separating, and the locking bent portion 3a locks the locking pin 5, thereby acting to hold the lock plate 2 in the locked position.

[Description of Examples]

Examples of the present invention will be described below.

1 is a pedestal attached to the frame F, and the upper part of the case c
The rotation shaft 2b of the lock plate 2 is fixed to. 2
1 is a lock plate that can be rotated around a rotating shaft 2b fixed on the surface of the pedestal 1, and has an engaging recess 2a that engages with a lock pin p on the door side d, and a lock plate that is inserted into the pedestal 1 and locks with the movable plate 3. It has a stop pin 5. 3
is a movable plate that can slide inside the case-shaped portion c of the base 1, and includes a locking bent portion 3a and a locking bent portion for positioning the locking pin 5 in a locked state within the arcuate hole 7. It has an inclined wall 3c connected to 3a, and an unlocking operation part 3d protrudes outside the base 1. 3b is the return spring 9
4 is a spring receiver at the free end of the return spring 9; 6 is an unlocking spring that presses the locking pin 5 in the direction of the unlocked position; 7 is an arcuate hole through which the locking pin 5 is inserted into the base 1; This allows the lock plate 2 to rotate relative to the base 1. 8 is a guide plate for the movable plate 3, 9 is a return spring, and 10 is a spring receiving pin that supports the unlocking spring 6.

The effect will be explained below.

Unlocked state (Figs. 1 and 2) The locking pin 5 of the lock plate 2 is located at the upper end of the arcuate hole 7 of the base 1, and is held at its upper end position by the urging force of the unlocking spring 6. ing. At this time, the lock plate 2 is tilted with respect to the base 1 about its central rotation axis 2b.

Further, the rotating plate 3 has the locking pin 5 on its inclined wall 3c.
The arcuate hole 7 is pressed against the biasing force of the return spring 9.
It is located below and does not protrude from the surface.

Locked state (FIGS. 3 and 4) When the door is closed, the lock pin p of the door d rotates the lock plate 2 while pushing the edge of the engagement recess 2a of the lock plate 2. Finally, the lock pin p fits into the engagement recess 2a. At this time, when the lock plate 2 is rotated, the locking pin 5 moves along the arcuate hole 7 and the inclined wall 3c against the urging force of the unlocking spring 6, and is locked integrally with the movable plate 3. It passes through the bending part 3a and reaches the lower end of the arcuate hole 7.

Thus, the lock plate 2 stands upright together with the base 1.

Then, the movable plate 3 is raised to a position where it projects with respect to the arcuate hole 7 by the biasing force of the return spring 9 in the direction of the arrow in FIG. Thus, the locking pin 5 is connected to the locking bent portion 3.
a, it is fixed at the lower end position of the arcuate hole 7 and maintained in the locked state.

When unlocking, when the movable plate 3 is moved downward against the return spring 9 in the state shown in FIG. 4, the locking pin 5 is released from contact with the locking bent portion 3a. is pushed by the unlocking spring 6 and moves to the upper end of the arcuate hole 7 as shown in FIG. Then, the lock plate 2 also rotates about the rotation axis 2b and is inclined with respect to the base 1.

Although the above embodiments have been described with reference to the case in which the tightening device of the present invention is attached to the frame side F, the tightening device of the present invention may also be attached to the door side d.

(Effects of the present invention) The door can be locked simultaneously with closing without requiring any other operations. Also, just by moving the movable plate 3,
Since it can be unlocked, it is easy to lock and unlock, and the locked and unlocked state is reliably maintained by the unlocking spring 6 and the locking bent portion 3a of the movable plate 3.

It can be made much smaller than conventional latch bolt type automatic locking devices.

[Brief explanation of the drawing]

Figure 1: Front view of the invented fastener in the unlocked state.
Figure 2: Back view of Figure 1 with the back cover removed, Figure 3:
Front view of the fastener of the present invention in a locked state, Figure 4: Rear view with the back cover removed in Figure 3, Figure 4a: Movable plate 3
5: Plan view when locked, FIG. 6: Side view when locked, 1... Pedestal, 2... Lock plate, 2a...
Engagement recess, 2b... Rotating shaft, 3... Movable plate, 3a
...Bending part for locking, 3b...Bending part for spring receiver, 3
c... Inclined wall, 3d... Unlocking operation section, 4... Return spring receiver, 5... Locking pin, 6... Unlocking spring, 7
...Arc-shaped hole, 8...Guide plate, 9...Return spring,
10...Spring receiving pin, p...Lock pin, d...
...door side, F...stile, c...case-shaped part.

Claims (1)

[Claims for Utility Model Registration] It is rotatable around a rotation shaft 2b fixed to the surface of the pedestal 1, and has an engaging recess 2a at one end;
a lock plate 2 with a locking pin 5 protruding thereon; a lock plate 2 bored into the pedestal 1 into which the locking pin 5 is fitted;
An arcuate hole 7 centered on the rotation axis 2b, a spring receiving bent portion 3b, an inclined wall 3c that protrudes and retracts from the arcuate hole 7, and a locking bent portion that protrudes and retracts from the arcuate hole 7. 3a, a movable plate 3 having an unlocking operation part 3d, and a spring receiver 4 at the free end of a return spring fixed to the base 1.
The return spring 9 inserted between the spring receiver bent portion 3b and the spring receiver 4 at the free end of the return spring, and the locking pin 5 wound around the spring receiver pin 10 of the base 1 are inserted into the arc-shaped hole. It consists of an unlocking spring 6 that presses against one end of the lock plate 7, and a lock pin p that is implanted in the mating member.When the door is opened and unlocked, the lock plate 2 is inclined with respect to the base 1, and the locking pin 5 is Unlocking spring 6
The movable plate 3 is positioned at the upper end of the arcuate hole 7 due to the urging force of
is in a relative position where it does not protrude from the arcuate hole 7 and is pressed downward by the locking pin 5 against the biasing force of the return spring 9, and when the door is closed, the unlocking spring 6 The movable plate 3 is located at the lower end of the arcuate hole 7 against the biasing force of the return spring 9.
The locking bent portion 3a protrudes from the arcuate hole 7 due to the urging force of the locking pin 5, and the locking bent portion 3a has a relative positional relationship that inhibits movement of the locking pin 5 within the arcuate hole 7. casement window fasteners.