WO2014129679A1

WO2014129679A1 - Automatically-opening door lock having built-in shape memory elastic body and safe door comprising same

Info

Publication number: WO2014129679A1
Application number: PCT/KR2013/001361
Authority: WO
Inventors: 김재일; 김준석; 김효철; 김청미; 손영주
Original assignee: 동아대학교 산학협력단
Priority date: 2013-02-21
Filing date: 2013-02-21
Publication date: 2014-08-28

Abstract

The present invention relates to an automatically-opening door lock having a built-in shape memory elastic body and a safe door comprising same. The present invention comprises: a case embedded in a door; a towing member installed inside the case and moving linearly inside the case; a fixed plate fixed inside the case; a latch bolt inserted into the case or protruding outside the case for hooking onto a stopping groove by being pulled by the towing member while supported by the fixed plate; a support spring installed between the latch bolt and the fixed plate for elastically supporting the latch bolt to the outside of the case; and the shape memory elastic body having one end fixed to the latch bolt and the other end fixed to the fixed plate for pulling the latch bolt into the case and releasing same from the stopping groove. The automatically-opening door lock having the built-in shape memory elastic body and the safe door comprising same have a very simple structure and is easily operated, thereby having a low manufacturing cost, and operate normally even in extreme situations by not using electricity, thereby having high reliability and thus can minimize casualties during a fire.

Description

Self-opening door lock with shape memory elastic body and safety door

The present invention relates to an automatic open door lock having a shape memory elastic body and a safety door having the same.

There are a wide variety of door locks, for example, a cylindrical shape used for an office or an indoor door, or a box shape installed in a front door or a fire door. Recently, digital door locks with various advanced circuits and sensors have been developed.

Basically, the door lock is a case that is built in the door to provide a space that is open to the door frame in the closed state of the door, the traction bracket is installed in the case and receives a rotational force when the door handle rotates, and the towing bracket It is composed of a latching bolt and the like to keep the door closed by engaging the engaging groove formed in the door frame is elastically supported to the outside of the case by the force of the spring in the linked state.

Since the latch bolt is always protruded out of the case by the elastic force of the spring, for example, the door does not open unless the handle is rotated while the door is closed.

As described above, since the latch bolt maintains the closed state of the door, the latch bolt may block the internal space from the outside to prevent the inflow of noise or to control the entrance and exit of the outsider. It helps to prevent warmth from going outside.

However, the latch bolt may have a reverse function of blocking people's escape routes in case of a fire or other emergency. For example, in an urgent situation in which a fire breaks out and people have to open and evacuate the door, the door blocking the escape path of the people is kept closed, thus acting as a factor preventing rapid evacuation.

On the other hand, as a technology for automatically opening the door in the case of the Korean Utility Model Publication No. 0424931 (door to be automatically opened in the event of fire in conjunction with a digital door lock), the thermal sensor 105 and the smoke sensor on the ceiling of the room A structure is disclosed that installs 104 and causes the sensor to automatically open the digital door lock 103.

However, the conventional automatic opening door described above has a disadvantage in that the structure thereof is complicated and in particular, when the circuit of the digital door lock 103 is damaged by heat, it does not function and thus does not function. In addition, even if the signal transmission line connecting each sensor 104,105 and the digital door lock 103 is cut, it does not function.

The present invention has been created to solve the above problems, the structure is very simple and simple to operate, the production cost is low, especially because it does not use electricity, so it works normally in any extreme situation, so that the reliability is high and the human injury in the fire An object of the present invention is to provide an automatic open door lock having a shape memory elastic body and a safety door having the same.

The self-opening door lock incorporating the shape memory elastic body of the present invention for achieving the above object, the case is built in the door and is fitted to the locking groove formed in the door frame when the door is closed, and the opening to the locking groove side; A towing member installed inside the case and linearly moving in the case by receiving a rotational force when the door handle is rotated; A fixing plate fixed in the case; A latch bolt which is supported by the fixing plate and is inserted into the case by the towing member or protrudes out of the case to fit into the locking groove; A support spring installed between the latch bolt and the fixing plate to elastically support the latch bolt to the outside of the case; It is contracted when the surrounding temperature rises above the set temperature while being installed inside the case, and the latch bolt is pulled into the case to be released from the locking groove. One end is fixed to the latch bolt and the other end is fixed to the fixing plate. It characterized in that it comprises a fixed shape memory elastomer.

In addition, the shape memory elastic body; It is disposed in parallel with the support spring, characterized in that the one end is fixed to the latch bolt and the other end is a coil-shaped memory spring is fixed to the fixing plate, respectively.

In addition, a link rod extending to the fixed plate side and slidably supported on the fixed plate is fixed to the latch bolt, and both ends of the shape memory spring are wound on the latch bolt and the fixed plate with the link rod wrapped. It is characterized in that each is fixed.

In addition, a link rod extending to the fixed plate side and slidably supported on the fixed plate is fixed to the latch bolt, and the shape memory spring is arranged side by side with the link rod at the side of the link rod. do.

In addition, the shape memory spring is characterized in that it is wrapped in the support spring to have the same central axis as the support spring.

In addition, the latch bolt and the fixing plate, characterized in that the spring holder for fixing both ends of the shape memory spring is further provided.

The side of the latch bolt is operated in conjunction with the latch bolt, it is characterized in that it is further provided with a guard bolt that takes the form of a round bar and is elastically supported to the outside of the case by another support spring.

In addition, the safety door of the present invention for achieving the above object, the door body is hingedly connected to the door frame mounted on the wall rotatably; A handle provided at a predetermined position of the door body; A case which is built in the door main body, is fitted to a locking groove formed in the door frame when the door body is closed, and is opened to the locking groove side; A towing member installed inside the case and receiving a rotational force when the handle is rotated to linearly move in the case; A fixing plate fixed in the case; A latch bolt which is supported by the fixing plate and is drawn into the case or protrudes out of the case and drawn into the locking groove by the towing member; A support spring installed between the latch bolt and the fixing plate to elastically support the latch bolt to the outside of the case; It is installed inside the case, one end is fixed to the latch bolt, the other end is fixed to the fixed plate and contracted when the surrounding temperature rises above the set temperature, and the latch bolt is drawn into the case from the locking groove By separating, characterized in that it comprises a shape memory elastic body to open the door body without rotation of the handle.

In addition, a link rod extending to the fixed plate side and slidably supported on the fixed plate is fixed to the latch bolt, and both ends of the shape memory spring are closed on the latch bolt and the fixed plate while the link rod is wrapped. It is characterized in that each is fixed.

In addition, a link rod extending to the fixed plate side and slidably supported on the fixed plate is fixed to the latch bolt, and the shape memory spring is arranged side by side with the link rod on the side of the link rod. do.

In addition, the side of the latch bolt to work together with the latch bolt, it is characterized in that the guard bolt is further provided to take the form of a round bar and elastically supported to the outside of the case by another support spring.

The self-opening door lock and the safety door having the shape memory elastic body of the present invention made as described above are very simple in structure and simple in operation so that the manufacturing cost is inexpensive and it does not use electricity in particular. The high reliability ensures that human injury can be minimized in the event of a fire.

1 is a front view of a door provided with an automatic open door lock according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view taken along line II-II of FIG. 1.

3 and 4 is a view for explaining the configuration and operation principle of the automatic open door lock according to an embodiment of the present invention.

5 and 6 is a partial cross-sectional view showing another configuration and operation principle of the automatic open door lock according to an embodiment of the present invention.

7 and 8 are partial cross-sectional view for explaining another configuration and operation principle of the automatic open door lock according to an embodiment of the present invention.

Hereinafter, one embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in the drawing, the door body 11b is supported by the hinge 11a in the rectangular door frame 13. The hinge 11a is a hardware for rotatably supporting the door body 11b.

In addition, the door lock 15 and the handle 19 are provided at the free end of the door body 11b. The handle 19 is to be grabbed and turned by the user when entering and exiting, for example, by turning the handle 19 to pull the door body 11b.

The door lock 15 is to keep the door in a closed state in conjunction with the rotation of the handle (19 in Figure 1) in normal times, and automatically open in case of fire, so that the door body (11b) can be opened even if the handle is not turned do.

FIG. 2 is a partial cross-sectional view taken along line II-II of FIG. 1.

As shown, the installation space 17 is formed in the predetermined position of the door main body 11b, and the door lock 15 of this embodiment is attached to the installation space 17. As shown in FIG.

The door lock 15 is horizontally embedded in the installation space 17 and extends in the longitudinal direction, the case 27 corresponding to the locking groove 13a having one end formed in the door frame 13, and the case. Installed in the interior of the 27 and is driven by the driven part (described below in Figure 3 below) and the elastically supported to the outside of the case 27 and the locking groove (13a) The latch bolt 23 is fitted.

The latch bolt 23 is elastically supported to the outside of the case 27 by a support spring 29 to be described later to maintain a state of being fitted in the locking groove 13a, and the case 27 by rotating the handle 19 Drawn into the interior.

As shown in the drawing, the self-opening door lock 15 incorporating the shape memory elastic body according to the present embodiment includes a case 27 providing an internal space 27a and a support force fixed to the inside of the case 27. A fixed plate 33 and a towing bracket 35 installed at the right side of the drawing of the fixed plate 33 and receiving a rotation torque from the shaft 21 of the handle 19 to reciprocate in the longitudinal direction; The latch bolt 23 and the guard bolt 25, which are installed at the opening side of the case 27 and protrude outward from the case 27, and the latch bolt 23 and the guard bolt 25 are provided in the case. A plurality of support springs 29 and elastic support to the outside, provided in the inner space (27a), and reacts and shrinks when the ambient temperature rises above the set temperature, the latch bolt 23 and the guard bolt 25 the case (27) Including a shape memory spring (31) to draw inside All.

The case 27 is formed by bending a metal plate, and is open to the locking groove 13a in a state where the case 27 is horizontally disposed inside the door body 11b. Of course, the structure of the case 27 can be changed in various ways.

The fixing plate 33 is a metal plate having a predetermined thickness, and has a through hole 33a at the center thereof. The through hole 33a is a passage through which the link rod 23b of the latch bolt 23 passes.

The link rod 23b is a member which is fixed to the latch bolt 23 and extends in the longitudinal direction, and passes through the through hole 33a and the engaging hole 35a of the traction bracket 35 in order. In addition, a head portion 23d is formed at an extended end of the link rod 23b. The head portion 23d is caught by the catching hole 35a of the towing bracket 35, for example, is attached when the towing bracket 35 moves to the right in the drawing, and is a portion for tensioning the latch bolt 23. It has the latching jaw 23e which catches on 35a.

The traction bracket 35 is a member that is linked to the shaft 21 and reciprocates during the axial rotation of the shaft 21. The link structure of the shaft 21 and the traction bracket 35 may also be changed in various ways.

In addition, the latch bolt 23 and the guard bolt 25 forms a set and moves simultaneously in normal operation. That is, by rotating the handle 19 enters the inside of the case or is exposed to the outside of the case. The guard bolt 25 is operated when a plate member is inserted into a door gap to push the latch bolt 23 toward the case 27, so that the latch bolt 23 is pushed into the case 27 any longer. It does not play a role.

Spring latch members

23a and 25a are provided on the latch bolt 23 and the guard bolt 25, respectively. In addition, two spring support members 33c are fixed to the fixing plate 33.

The spring support member 25a and the corresponding spring support member 33c positioned on the guard bolt 25 are located in a straight line and have a support spring 29 therebetween. In addition, the spring support member 23a provided on the latch bolt 23 and the opposite spring support member 33c corresponding thereto are also located in a straight line and have a support spring 29 therebetween.

The

spring support members

23a, 25a, and 33c support both ends of the support spring 29 and prevent the spring from bouncing.

The two support springs 29 are compression coil type springs having the same size, and elastically support the latch bolt 23 and the guard bolt 23 in the direction of arrow a. The latch bolt 23 does not fall outside the case 27 because the head portion 23d is hung on the traction bracket 35.

On the other hand, the shape memory spring 31 is a coiled spring made of a shape memory alloy and contracts in response to a set temperature. As the shape memory alloy, all shape memory alloys capable of performing the shape memory ability can be applied.

Both ends of the shape memory spring 31 are fixed to the latch bolt 23 and the fixing plate 33 through

spring holders

23c and 33b while the link rod 23b is wrapped. Therefore, when the shape memory spring 31 reaches the set temperature and is exported, the latch bolt 23 is pulled in the direction of arrow F to be inserted into the case 27.

The temperature at which the shape memory spring 31 is sensitive is determined at the time of manufacturing the shape memory spring. For example, it can be designed to react at a temperature of 60 ° C. or other temperatures.

The shape memory spring 31 responds to the ambient temperature to draw the latch bolt 23 into the case 27 or to protrude outside the case 27 by interaction with the support spring 29. do.

Like the general shape memory spring, the shape memory spring 31 changes the elastic modulus in response to the temperature of the surroundings. In other words, starting at the set temperature, the intrinsic elastic force increases as the temperature increases. In particular, the elastic modulus of the shape memory spring 31 is greater than the elastic modulus of both support springs 29 in an environment higher than the set temperature determined at the time of manufacturing the shape memory spring 31, and the support spring in an environment lower than the set temperature. Less than 29

Thus, for example, when the ambient temperature is maintained below the set temperature (for example, 60 ° C.), the shape memory spring 31 is present on the martensite, and has a smaller elastic force than the supporting springs 29 on both sides. Dominated by 29). At this time, the latch bolt 23 is protruded to the outside of the case 27 by the support spring (29).

On the contrary, when the ambient temperature is higher than the set temperature, the shape memory spring 31 increases its intrinsic elasticity due to its phase transformation, and has a larger elastic modulus than the support spring 29 to constrict and contract the elastic force of the support spring 29. The latch bolt 23 is drawn into the case 27.

5 and 6 is a partial cross-sectional view showing another configuration and operation principle of the automatic open door lock 15 according to an embodiment of the present invention.

Hereinafter, the same reference numerals as the above reference numerals refer to the same members having the same function, and repeated description thereof will be omitted.

Referring to FIGS. 5 and 6, it can be seen that two spring holders 37 are disposed on the latch bolt 23 and the spring holder 37 so as to correspond to each other. The spring holder 37 is a fixing means for accommodating and fixing both ends of the shape memory spring 31, and is arranged symmetrically with the link rod 23b interposed therebetween.

Each of the shape memory springs 31 is contracted (when the set temperature is reached) in which both ends are fitted to the spring holder 37 to draw the latch bolt 23 into the case 27 to engage the locking groove 13a. The door main body 11b can be opened by simply pushing away from the door body 11b.

7 and 8 are partial cross-sectional views for explaining another configuration and operation principle of the automatic open door lock 15 according to an embodiment of the present invention.

As shown, the shape memory spring 31 may be embedded in one of the support springs 29 of the two support springs 29 installed in the inner space 27a. By making the diameter of the shape memory spring 31 smaller than the diameter of the support spring 29, the shape memory spring 31 can be applied to be wrapped in the support spring (29).

As such, the shape memory spring 31 is configured to be wrapped in the support spring 29, so that the space utilization in the narrow inner space 27a is high.

In some cases, by making the diameter of the shape memory spring 31 larger than the diameter of the support spring 29, the shape memory spring 31 may be configured to surround the support spring (29).

In addition, although the shape memory spring 31 is provided only in the one side support spring 29 side in FIG. 7 and FIG. 8, it can be applied to both support springs 29 similarly.

In any case, the shape memory spring 31 applied while being wrapped in the support spring 29 contracts when the outside temperature rises above the set temperature, and pulls the latch bolt 23 and the guard bolt 25 in the direction of arrow F. FIG. The door body 11b can be opened without turning the handle.

As mentioned above, although this invention was demonstrated in detail through the specific Example, this invention is not limited to the said Example, A various deformation | transformation is possible for a person with ordinary knowledge within the scope of the technical idea of this invention.

Claims

A case embedded in the door and fitted to a locking groove formed in the door frame when the door is closed, and opened to the locking groove side;

A towing member installed inside the case and linearly moving in the case by receiving a rotational force when the door handle is rotated;

A fixing plate fixed in the case;

A latch bolt which is supported by the fixing plate and is inserted into the case by the towing member or protrudes out of the case to fit into the locking groove;

A support spring installed between the latch bolt and the fixing plate to elastically support the latch bolt to the outside of the case;

It is contracted when the surrounding temperature rises above the set temperature while being installed inside the case, and the latch bolt is pulled into the case to be released from the locking groove. One end is fixed to the latch bolt and the other end is fixed to the fixing plate. An automatic open door lock having a shape memory elastic body comprising a fixed shape memory elastic body.
The method of claim 1,

The shape memory elastic body is;

And a coil shape memory spring disposed at the side of the support spring and fixed to the latch bolt and fixed at the other end to the fixing plate.
The method of claim 2,

The latch bolt is fixed to the link rod extending to the fixed plate side to be slidably supported on the fixed plate,

The shape memory spring is a self-opening door lock having a shape memory elastic body, characterized in that both ends are fixed to the latch bolt and the fixing plate while the link rod is wrapped.
The method of claim 2,

The latch bolt is fixed to the link rod extending to the fixed plate side to be slidably supported on the fixed plate,

The shape memory spring is a self-opening door lock having a shape memory elastic body, characterized in that arranged side by side with the link rod on the side of the link rod.
The method of claim 2,

The shape memory spring is a self-opening door lock having a shape memory elastic body, characterized in that wrapped around the support spring to have the same central axis as the support spring.
The method of claim 2,

The latch bolt and the fixing plate, the automatic opening door lock with a shape memory elastic body further comprising a spring holder for fixing both ends of the shape memory spring.
The method according to any one of claims 2 to 6,

The side of the latch bolt is operated in conjunction with the latch bolt, taking the form of a round bar and the guard bolt which is elastically supported to the outside of the case by another support spring is further provided with a shape memory elastic body.
A door body rotatably hinged to the door frame mounted on the wall;

A handle provided at a predetermined position of the door body;

A case which is built in the door main body, is fitted to a locking groove formed in the door frame when the door body is closed, and is opened to the locking groove side;

A towing member installed inside the case and receiving a rotational force when the handle is rotated to linearly move in the case;

A fixing plate fixed in the case;

A latch bolt which is supported by the fixing plate and is drawn into the case or protrudes out of the case and drawn into the locking groove by the towing member;

A support spring installed between the latch bolt and the fixing plate to elastically support the latch bolt to the outside of the case;

It is installed inside the case, one end is fixed to the latch bolt, the other end is fixed to the fixed plate and contracted when the surrounding temperature rises above the set temperature, and the latch bolt is drawn into the case from the locking groove A safety door comprising a shape memory elastic body to be separated, thereby opening the door body without rotation of the handle.
The method of claim 8,

The shape memory elastic body;

And a coil shape memory spring disposed in parallel with the support spring and having one end fixed to the latch bolt and the other end fixed to the fixing plate.
The method of claim 9,

The latch bolt is fixed to the link rod extending to the fixed plate side to be slidably supported on the fixed plate,

The shape memory spring is a safety door, characterized in that both ends are fixed to the latch bolt and the fixing plate while the link rod is wrapped.
The method of claim 9,

The latch bolt is fixed to the link rod extending to the fixed plate side to be slidably supported on the fixed plate,

The shape memory spring is a safety door, characterized in that arranged side by side with the link rod on the side of the link rod.
The method of claim 9,

The shape memory spring is a safety door, characterized in that wrapped around the support spring to have the same central axis as the support spring.
The method of claim 9,

The latch bolt and the fixing plate, the safety door, characterized in that further provided with a spring holder for fixing both ends of the shape memory spring.
The method according to any one of claims 9 to 13,

Safety latch, characterized in that the side of the latch bolt to work in conjunction with the latch bolt, take the form of a round bar and the support bolt is elastically supported to the outside of the case by another support spring.