JPH0122059Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a smoke evacuation window that can be opened by folding the door toward the outside or inside. The present invention relates to a door locking device that can open a door.

[Conventional technology]

Conventional devices of this type include those installed on the outside of the frame and those installed inside the frame. As an external door locking device for the former, for example, a device disclosed in Japanese Utility Model Publication No. 52-32121 is disclosed. be. The technology is
A latch 12 that slides along the longitudinal direction is provided on the interior side surface of the upper horizontal frame of the frame, and a receiver 13 has a U-shaped notch into which the protrusion 28 of the latch 12 fits into the door.
It has been established.

In addition, as an internal attachment, for example,
The one disclosed in Publication No. 73199 is known. The device disclosed in the publication is provided with a latch that faces the latch of the door so as to be able to rotate up and down, and a locking rod that fixes the rotating latch by a bell crank that engages with the cam groove from a linear reciprocating motion. One end of the bell crank is loosely fitted into the locking rod to cause a linear reciprocating motion.

[Problem that the invention attempts to solve]

However, in the former of the above-mentioned techniques, since the latch simply moves back and forth in a straight line, the door cannot be opened unless the protruding piece is completely pulled out through the notch in the receiver. Therefore, there was a drawback that the amount of movement of the latch was extremely large.

Further, in the case of the latter publication, since the movement is converted several times, the structure becomes extremely complicated, and there are drawbacks such as a large sliding resistance and a large unlocking force.

This idea aims to solve the above drawbacks.
To provide a door locking device for a smoke exhaust window that can securely open the door by making the pull string light and the amount of pulling when opening the door of the smoke exhaust window.

[Means for solving problems]

The solution according to this invention has a latch on the door, a movable body provided with a claw piece for the latch on the window frame, and a drawstring and a return spring connected to the movable body. In particular, the movable body is linked. The movable body is configured to reciprocate along an arcuate trajectory in a pendulum-like manner.

〔Example〕

To specifically explain the door locking device for the smoke exhaust window according to this invention, Fig. 1 shows the smoke exhaust window viewed from the indoor side. Horizontal frames 2, 3 and left and right vertical frames 4, 4
It is assembled with. The door 5 is formed of upper and lower horizontal frames 6, 7, left and right vertical frames 8, 8, and a plate glass 9, which are also made of extruded shapes, and although not shown,
The door 5 is opened by tilting it toward the outdoor side by the repulsive force of the hinge provided at the lower part and the leaf spring. Also, door 5
As shown in FIG. 2, a latch 10 is provided on the indoor side of the upper side stile 6 so as to be biased upward by a spring 11.

On the other hand, the upper horizontal frame 2 of the frame body 1 is formed in a U-shaped cross section with the upper part open, and the majority of the door locking device of the present invention is installed in a hole extending longitudinally through the bottom wall of the upper horizontal frame 2. The case 12 to be assembled is fixed, and the case 1
2 is covered with a cover 13. Also case 12
The pins 14 are generally U-shaped with the bottom open, and as shown in FIG. and each pin 1
4 and 14 are rotatably provided with links 15 and 15 of the same length, and a movable body 16 is pivotally attached to the tips of both links 15 and 15 at positions symmetrical about the center thereof.

The movable body 16 is an elongated plate whose middle part is bent upward into a mountain shape, and a claw piece 17 facing the latch 10 is provided in the middle of the bent part to protrude downward. The tip of a drawstring 18 is connected to one end of the movable body 16, and a return spring 19 is connected to the other end. Further, pins are installed on the left and right sides of the portion of the case 12 located below the bent portion of the movable body 16.
The pin on the 8 side serves as a stopper 20 that stops the claw piece 17 at a position facing the latch 10 when the movable body 16 moves back due to the return spring 19.

In addition, in FIG. 3, the link 15 of the movable body 16
The part shown between the dotted lines in the pivoting part with the movable body 16 is a notched groove 21, and the link 15 is fitted into the notched groove 21 and pivoted, and almost contacts the inner wall surface of the case 12 over almost the entire length of the movable body 16. It is formed like this. Further, the aforementioned drawstring 18 is guided in the longitudinal direction of the upper horizontal stile 6, and is exposed and suspended on the indoor side of the vertical stile 8, as shown in FIG. Furthermore, a drawstring 22 hanging in parallel with the drawstring 18 is used when the opened door 5 is pulled up and closed. Further, the lower surface of the claw piece 17 is as shown in FIG.
The slope is gradually lowered from the outdoor side to the indoor side,
The upper surface of the latch 10 is formed into an inclined surface opposite to that of the claw piece 17.

Next, in the example shown in FIG. 4, a movable body 16' is pivotally mounted within a case 12' by a single link 15.
The movable body 16' has an extension 23 protruding from one of the claw pieces 17, a link 15 is pivotally attached to the center of the claw piece 17, a drawstring 18 is connected to the tip of the extension part 23, and the extension part 23 is attached to the claw piece 17. A return spring 19 is fixed opposite the drawstring 18, and a stopper 20' is provided corresponding to the connecting side of the return spring 19 of the claw piece 17.

With this structure, when opening the door 5 from a closed state, it is sufficient to pull the drawstring 18 connected to the movable body 16;
As shown in FIG. 5, the movable body 16 pulled by the drawstring 18 moves in the direction drawn by the drawstring 18 in an arc movement like a pendulum. At this time, if we look at the movement of the pawl piece 17, we can see that it moves from the position facing the latch 10 to the right side in the figure, and at the same time sequentially moves upward and disengages from the latch 10. By keeping the disengaged state, the door 5
It is something that can be released. Next, when the drawstring 18 is loosened, the movable body 16 moves back until it comes into contact with the stopper 20 due to the tensile force of the return spring 19.

In addition, in the case of an example in which a single link 15 is used,
It has the same effect as described above. Furthermore, when closing the door 5, the latch 10 can be closed by pulling the other drawstring 22 while holding the claw piece 17 in its returned position. It is pressed downward by the claw piece 17, passes under the claw piece 17, rises again by the repulsive force of the spring 11, and engages with the claw piece 17 to maintain the closed state.

[Effect of idea]

The door locking device for a smoke exhaust window according to this invention has a movable body provided with a claw piece facing the door latch in the frame so as to reciprocate in a pendulum-like arc through links, and the movable body A pull string is connected to one end, a return spring is connected to the other end, and a stopper is provided corresponding to the movable body so that the pawl of the movable body that moves back stops at a position opposite to the latch. The number of parts is small, the structure is simple and compact, and it can be housed in a narrow frame without any problems. In addition, since the movable body is provided with a claw piece and pivoted by a link, the movable body can instantly move in an arc by simply applying a force to pull it sideways with the drawstring, and as a result, the movable body can move in an arc. The sliding resistance is extremely small, and it can be driven reliably with a light force. Furthermore, since the pawl pieces move in an arc together with the movable body, the latch can be completely released after a short distance of movement, allowing the door to be opened quickly.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a smoke exhaust window equipped with a door locking device according to this invention, Fig. 2 is an enlarged sectional view taken along line A-A in Fig. 1, and Fig. 3 is Fig. 2 B-B. 4 is a sectional view showing a similar example of the door locking device according to this invention, and FIG. 5 is a sectional view showing the state when the door is opened. 1... Frame, 5... Door, 10... Latch, 12
...Case, 13...Cover, 14...Pin, 1
5... Link, 16, 16'... Movable body, 17...
...Claw piece, 18...Draw string, 19...Return spring, 20, 20'...Stopper.

Claims (1)

[Scope of claim for utility model registration] 1 Frame 1 of a smoke exhaust window equipped with a door 5 that can be opened by folding down
A movable body 16, 16' having a protruding claw piece 17 facing the latch 10 of the door 5 is suspended by a link 15 so as to be able to reciprocate along an arc locus in a pendulum shape, and the movable body 16, Drawstring 18 at one end of 16'
A return spring 19 is connected to the other end, and the claw pieces 17 of the movable bodies 16, 16' are connected to the latch 10 of the door 5 by the return spring 19 and stoppers 20, 20' protruding into the frame 1. A door locking device for a smoke exhaust window, characterized in that it is arranged so that it can be held in opposition. 2. The movable body 16 is formed long in parallel to the longitudinal direction of the upper horizontal frame 2 of the frame body 1, and a claw piece 17 is provided protrudingly in the middle part thereof, and the claw piece 17 of the movable body 16
A door locking device for a smoke exhaust window according to claim 1, characterized in that links 15, 15 are pivotally mounted at symmetrical positions with respect to the center.