JP4386272B2 - Door closing device - Google Patents

Description

    The present invention relates to a closing device for keeping a panel-like shielding means combined with an opening of a building, that is, a door or a window door (collectively referred to herein as “door”) in a closed state.

    The door is usually provided with a lock to keep it closed and prevent outsiders from entering. In recent years, it has been reported that an increase in house burglary is reported, and it is recommended to provide a plurality of locks instead of a single door at one place.

    Based on "unlocking" such as using a key lock, breaking the glass part, inserting a hand from there to unlock, or unlocking using special unlocking technology (so-called "picking technology") For intrusion techniques, it takes a long time to unlock all of the locks, or attach an auxiliary lock on the top of the door cage to make it difficult to unlock from the outside. Countermeasures are being taken. Recently, however, there has been an increase in violent intrusion techniques, such as breaking a lock with a drill or bar, or forcing the door open with a bar. For such intrusion techniques, increasing the number of conventional locks by a few has little effect. Therefore, a lock highly resistant to attacks by drills and bars has been proposed. Examples of such locks can be found in US Pat.

    The door lock described in Patent Document 1 is provided with a locking portion that rotates at the tip of the dead bolt, and after the dead bolt is engaged with the receiving hole of the receiving member and is locked, the locking portion is rotated. To prevent the deadbolt from moving backwards.

In the cylinder lock device for a vending machine described in Patent Document 2, the shape of the protective disk covering the front part of the rotor is devised to prevent drilling breakage with a drill, pulling breakage with a bar, or splitting breakage with a chisel tool. Both are strong.
Japanese Patent Laid-Open No. 11-303482 (page 3-5, FIG. 1-8) Japanese Patent Laid-Open No. 11-324422 (page 2-3, FIG. 1-2)

    Since the lock described in Patent Document 1 engages the locking portion at the tip of the dead bolt in the receiving hole of the receiving member so that the dead bolt does not retract in the unlocking direction, compared with a normal lock High resistance to attacks by crowbars. However, if a large force is applied between the door and the door frame by the large bar, the receiving member may be deformed and the dead bolt may come off. Also, if the deadbolt is cut, the lock becomes invalid.

    The lock described in Patent Document 2 is strong against attacks. However, if the tip of the attack is directed toward the door instead of the lock, it cannot be said that the door is as resistant as the conventional lock.

    In any of the above Patent Documents 1 and 2, the main focus is to firmly lock against an attack by a bar or the like, so in the end, even if the door or lock is destroyed or not completely destroyed, it cannot be reused. There is a problem that it becomes possible.

    The present invention has been made in view of the above points, and when a violent attack is applied to the door by a drill or a bar, the damage received by the door itself is reduced and prevented from being destroyed. An object of the present invention is to provide a door closing device capable of maintaining the closed state of the door.

In the present invention, the door is provided with a substantially L-shaped lever portion having a rotating shaft and a slider that moves together with the spring and the protruding piece, and the door frame is allowed to move while abutting one end portion of the lever portion. And a lever receiver that has a restricting portion that does not allow separation at the end portion and receives the one end portion, and the one end portion of the lever portion is movable in contact with the lever receiver. The other end portion can be brought into contact with the spring or the protruding piece by moving the slider, and the lever portion is biased with a rotational force in a direction in which the lever portion opens, When the slider is moved so that the spring contacts the other end of the lever when the one end of the lever is received in the lever receiver, the elastic force of the spring is The one of the lever part The slider is moved to a position where the distance between the spring and the other end of the lever portion is equal to or greater than a predetermined distance so that the portion does not come out of the restricting portion of the lever receiver. If the door is moved in the opening direction, the one end portion of the lever portion can be pulled out from the restricting portion of the lever receiver, and the protruding piece is brought into contact with the other end portion of the lever portion. When the slider is moved, the one end portion of the lever portion is restricted by the lever receiver by continuing the movement of the slider while the projecting piece is in contact with the other end portion of the lever portion. It is configured to open the door as well as to come out of the part.

Further, the lever portion is composed of a lever and an arm fixed substantially at a right angle to the lever. Further, a roller is provided at the one end of the lever.

Further, the restricting portion of the lever receiver restricts the one end portion of the lever portion from coming out of the restricting portion of the lever receiver until the door is opened from a closed state to a predetermined angle. In the open state at an angle wider than the angle, the one end portion of the lever portion is made of a restriction plate having a length that comes out of the restriction portion of the lever receiver .

The slider may be moved by driving a motor to change its position.

Further, by moving the position of the slider to the first position, the spring is brought into contact with the other end portion of the lever portion, and one end portion of the lever portion serves as a restriction portion of the lever receiver. The first lock between the spring and the other end of the lever portion is achieved by moving the slider to the second position and the fully locked state where the door is closed when received. A half-locked state in which the door can be opened to the first angle without the one end of the lever coming out of the restricting portion of the lever receiver, and the position of the slider is moved to the third position. Accordingly, the second interval between the spring and the other end portion of the lever portion is set to a second interval larger than the first interval, and the one end portion of the lever portion does not come out of the restricting portion of the lever receiver. in front A door guard locking state in which the door can be opened to a second angle larger than the first angle; and by moving the position of the slider to a fourth position, the spring and the other end of the lever portion; A third interval larger than the second interval, and a release state in which the one end portion of the lever portion is allowed to open from the restricting portion of the lever receiver to open the door to a fully opened state, By moving the position of the slider to the fifth position, the protruding portion is brought into contact with the other end portion of the lever portion, and the slider is kept in contact with the other end portion of the lever portion. The one end of the lever part is removed from the restriction part of the lever receiver by continuing the movement of the lever, and the door is kept open by being in contact with the lever receiver. Wherein the Pun state, an alternative to, further comprising a control unit for controlling the driving of the motor to be able to make.

When the door is closed, the door can be given an elastic force sufficient to prevent the door from being opened by human power. Therefore, in order to enter, at least a gap that allows the body to slide in must be opened. For this purpose, it is possible to increase the gap little by little with a bar or the like, and put an object in the gap to prevent the door from closing. Therefore, compared to a normal intrusion, the tools and labor required are greatly increased, the possibility of being discovered while working on the intrusion is increased, and the effect of giving up the intrusion on the way can be expected.

    Many houses have security systems in place, and when a door lock is broken, an alarm is issued and a security company is automatically notified. However, in the door with a conventional lock, when the warning is issued, the lock has already been destroyed and the door has been opened, and the intruder succeeds in capturing the object before the security guard rushes from the security company there is a possibility. There is also a danger that the resident will not catch the alarm and try to escape, and will be caught by an intruder.

    On the other hand, according to the present invention, although it is possible to pry the door open, it takes a considerable amount of time to secure a clearance enough for people to pass. If you have a security system in place, you will be alerted when you first open the door, increasing the chance that a security officer or police officer will arrive while the intruder attempts to widen the gap. Residents can also spend time from hearing an alarm to getting ready for defense or evacuating to a panic room.

By adjusting the position of the elastic force begins to act on the door, because it is possible to put a door in the partially open state, even while refusing the entry and exit of people, it is possible to confirm the foreign person from the gap of the door .

It can be added to the closure device without adding large hand to the structure of the city sales door and the door frame. For this reason, it can be easily provided as a product, and can be relatively easily installed on an existing door.

Can grant the elastic force freely control is also easy.

The door can have an automatic opening function.

It will be described below with reference to the first embodiment of the present invention in FIG. 1-10. Here, a door for a doorway of a house is presented as an example of a door.

    First, an overall outline is shown based on FIG. 10 is a door frame and 20 is a door. The door 20 is connected to the door frame 10 by a plurality of hinge portions 11 at the left end in the figure, and opens and closes with the hinge portion 11 as a fulcrum. A lever-like knob 21 is provided at the right end of the door 20, that is, the free end of the door 20, and the door 20 can be opened and closed by grasping the knob 21.

    A door closer 22 is provided on the top of the door 20 in the same manner as a normal door. A closing device 30 according to the present invention is disposed at a position closer to the right side than the door closer 22. Hereinafter, the structure and function of the closing device 30 will be described with reference to FIGS.

    2A is a partial plan view of the upper portion of the door 20, and FIG. 2B is a partial front view of the same portion. The closing device 30 has a portion attached to the door frame 10 and a portion attached to the door 20. A lever receiver 31 is attached to the door frame 10, and a casing 35 is attached to the door 20.

    An upper end of a vertical output shaft 36 protrudes from the upper surface of the casing 35, and a lever 37 is fixed thereto. The lever 37 is rotated in the horizontal plane by the output shaft 36, and a roller 38 that rotates about a vertical axis is attached to the tip of the lever 37.

    The lever receiver 31 is formed of a hollow rectangular parallelepiped, and an opening 32 for receiving the lever 37 and the roller 38 is formed in a part of the side surface thereof. Both the lever receiver 31 and the casing 35 are made of sheet metal. However, in order to withstand the force of opening the door 20 with a bar, the lever frame 31 has sufficient strength in consideration of the material and thickness of the sheet metal. Also, the bolts fixed to the door 20 are given sufficient strength. In addition, the lever 37 and the components that support or rotate the lever 37 have sufficient strength.

    FIG. 3 is also a partial plan view of the upper portion of the door 20, in which the internal structure of the casing 35 is shown. An arm 39 is fixed to the output shaft 36 so as to be perpendicular to the lever 37. A slider 40 is combined with the arm 39. The slider 40 slides in parallel and horizontally with the door 20 along the track. The slider 40 is U-shaped in a planar shape, and a lever 37 is sandwiched between protruding pieces 40a and 40b at both ends thereof. A compression coil spring 41 serving as a source of elastic force is fixed inside the protruding piece 40a with its axis line horizontal.

    It is a ball screw 43 that is rotated forward and backward by a motor 42 to give the slider 40 a sliding movement. The compression coil spring 41 that is moved along the track together with the slider 40 hits the arm 39 and pushes it. Since the arm 39 and the lever 37 rotate integrally via the output shaft 36, when a counterclockwise torque is generated in the arm 39, a counterclockwise torque is also generated in the lever 37, and exerts a force on the lever receiver 31. It will be. By this force, the door 20 is attracted to the door frame 10. The biasing force in the closing direction that the compression coil spring 41 applies to the door 20 through such a mechanism, that is, the elastic force, is sufficient to prevent the door 20 from being opened by human power. In other words, a compression coil spring having a strength capable of generating such an elastic force is selected and used.

    The lever 37 is given a light rotational biasing force in the clockwise direction by a spring (not shown). Therefore, as long as the arm 39 does not push the arm 39 with the compression coil spring 41, the lever 37 tries to rotate clockwise. The angle shown in FIG. 5B is the rotation limit of the lever 37 with respect to the casing 35.

    FIG. 9 is a control block diagram. The control unit 50 controls the entire control and includes a CPU and a memory. The control unit 50 also includes a rectifier circuit and a voltage circuit, and supplies the electric power from the commercial power supply 51 to the controlled objects in a form that matches the controlled objects.

    The control unit 50 is connected to an authentication unit 52, a motor driver 53, an encoder 54, a lever opening sensor 55, a lever closing sensor 56, a door opening / closing sensor 57, and an alarm / communication device 58.

    The authentication unit 52 is for permitting the operation of the closing device 30. The person who tries to close or unlock the door 20 is confirmed by means such as a personal identification number or biometrics, and only the registered person can issue a command to the control unit 50. The authentication unit 52 is provided on the door 20 or on the wall surface instead of the door 20. The authentication unit 52 may be divided into a remote control unit and a reception unit, and a password input unit and a fingerprint recognition device may be provided on the remote control unit.

    The motor driver 53 is for driving the motor 42. The encoder 54 is arranged coaxially with the motor 42 and is used to know the rotation angle of the motor 42. The lever opening sensor 55 and the lever closing sensor 56 are provided to detect that the lever 37 is at a specific angle with respect to the casing 35. The door opening / closing sensor 57 is for detecting whether the door 20 is in a closed state. The alarm / communication device 58 is provided for issuing an alarm or communicating with a security company.

    Next, the operation of the closing device 30 will be described with reference to FIGS. 4-8 in addition to the previous drawings. 4-8 is a partial plan view similar to FIG. 3 and shows different operating states.

    FIG. 3 shows a state of the “all lock” mode. The motor 42 moves the slider 40 to the left in the figure and pushes the arm 39 by the elastic force of the compression coil spring 41. As a result, counterclockwise torque is generated in the output shaft 36 in the drawing, and the lever 37 that has entered the lever receiver 31 draws the door 20 in a direction in close contact with the door frame 10.

    In order for the lever 37 to come out of the lever receiver 31, it is necessary for the lever 37 to rotate clockwise with respect to the casing 35, but this is not possible as long as the compression coil spring 41 presses the arm 39. That is, the elastic force of the compression coil spring 41 acts on the lever 37 so that the lever 37 does not come out of the lever receiver 31.

    In this state, if there is an intrusion planner, the door 20 is provided with an elastic force sufficient to prevent the door 20 from being opened by human power. Can not open.

    If the intruder does not give up the intrusion, it is conceivable that the tip of the bar 100 is inserted between the door frame 10 and the door 20 as shown in FIG. If the lever principle is successfully used, the free end of the door 20 can be taken out of the door frame 10. However, when the force is loosened, the door 20 closes immediately. If you want to create a gap that allows one person to pass between the free end of the door 20 and the door frame 10, when the door 20 is opened, an object is inserted between the door frame 10 and the door 20 to open the door 20. In order not to return to the original state, it is necessary to repeat the work of inserting the object after widening the gap using the bar 100 in the same manner. This is very time consuming and labor intensive.

    Moreover, when the door 20 is first opened, the door opening / closing sensor 57 detects the movement of the door 20 and issues an alarm to the alarm / communication device 58, so that the resident has a relaxed and ready posture. Or evacuate to a panic room or report to the police. There is also communication with a security company that has signed a security contract, and it is highly probable that the intruder will succeed in the intrusion or that the guard will rush before the intruder gives up and escapes.

    FIGS. 5A and 5B show a state in which the “unlocking” mode is set. The motor 42 moves the slider 40 to the right and creates a large gap between the compression coil spring 41 and the arm 39. When the door 20 is pushed or pulled and moved in the opening direction, the lever 37 changes the relative posture with respect to the casing 35 from the posture shown in FIG. 5A to the posture shown in FIG. In the posture of FIG. 5B, the roller 38 comes out of the opening 32 of the lever receiver 31. Thereby, the door 20 does not receive the restriction | limiting by the closing device 30 at all, and can open to a full open state.

    As described above, the lever 37 is given a light clockwise rotation biasing force by a spring (not shown), and the angle shown in FIG. 5B is the rotation limit of the lever 37 with respect to the casing 35. For this reason, the lever 37 moves together with the door 20 without rattling while maintaining the posture of FIG. When the door 20 is closed, the roller 38 first hits the inner wall of the lever receiver 31. When the door 20 is pulled toward the door frame 10, the roller 38 enters the back of the lever receiver 31 and finally returns to the posture shown in FIG.

    In this embodiment, the door 20 can be partially opened by adjusting the position where the elastic force of the compression coil spring 41 starts to act on the door 20. Two modes of “half-locking” and “door guard locking” are set.

    FIGS. 6A and 6B show a state in which the “half-locking” mode is set. The motor 42 moves the slider 40 to the right a little more than in the “all locked” mode, and creates a small gap between the compression coil spring 41 and the arm 39. When the resident returns from going out, the resident can open the door 20 to the extent of the thickness of the door 20 as shown in FIG. If the authentication unit 52 is provided on the end surface of the door 20, the authentication is completed here, a command is issued to the operation unit 50, and the slider 40 can be slid to the state of the “unlocking” mode.

    FIGS. 7A and 7B show a state in which the “door guard locking” mode is set. The motor 42 moves the slider 40 further to the right than in the “half-locked” mode. For this reason, as shown in FIG.7 (b), the door 20 can be opened more largely than the case of a "half-locking" mode. If the opening is set to the same level as when a normal door is guarded with a door chain, a visitor can be confirmed from the gap.

    In the present embodiment, a force in the direction opposite to the elastic force of the compression coil spring 41 can be applied to the lever 37 from the motor 42 to open the door 20 in the form of “automatic opening”. The movement in the “automatic open” mode will be described with reference to FIGS.

    When the slider 40 is moved to the right as shown in FIG. As the slider 40 continues to move, the lever 37 rotates clockwise and pushes the lever receiver 31. Thereby, the door 20 begins to open. At the same time, the lever 37 itself comes out of the lever receiver 31.

    In the state of FIG. 8B, the roller 38 can be removed from the lever receiver 31. The movement of the slider 40 is stopped here, and then the door 20 is opened by hand.

    It is also possible to provide a lever receiver on the door 20 side and a lever and a mechanism for rotating the lever on the door frame 10 side.

    FIG. 10 shows a second embodiment of the present invention. FIG. 10 is a partial plan view similar to FIG. Components that are the same as or functionally common to those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted.

A fan-shaped gear 60 is fixed to the output shaft 36 instead of the arm 39 in the first embodiment. A rack 61 that meshes with the sector gear 60 is fixed or integrally formed on the slider 40. The ball screw 43 does not drive the slider 40 but drives a ball nut 62 disposed inside the slider 40, and moves the slider 40 through one of two compression coil springs disposed on both sides of the ball nut 62. Move. One is a compression coil spring 41, which gives the door 20 an elastic force sufficient to prevent the door 20 from being opened by human power, as in the first embodiment. The other compression coil spring 63 functions to soften the contact of the ball nut 62 against the slider 40 during “automatic opening”.

    In addition, in the second embodiment, the switch that protrudes the actuator during the course of the slider 40 constitutes the lever opening sensor 55 and the lever closing sensor 56. Further, the end of the ball screw 43 projects out of the casing 35, and a manual knob 64 is fixed thereto. The manual knob 64 is used to manually rotate the ball screw 43 when the motor 42 stops rotating due to a power failure or circuit failure.

    Although the embodiments of the present invention have been described above, various modifications can be made without departing from the spirit of the invention. For example, a normal lock may be added to a door provided with the closing device of the present invention and used together.

    The present invention can be widely used in buildings as a door closing device that is difficult to enter from the outside.

Front view showing the outline of the door It shows the upper part of the door, (a) is a partial plan view, (b) is a partial plan view Partial plan view showing internal mechanism Partial plan view showing a state different from FIG. “Unlocking” mode, (a), (b) Partial plan views in different states "Semi-locked" mode, (a), (b) Partial plan view of different states “Door guard locking” mode is shown, (a), (b) partial plan view of different states “Automatic open” mode is shown, and (a) and (b) are partial plan views in different states. Circuit block diagram Partial plan view showing the second embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Door frame 20 Door 30 Closing device 31 Lever receiver 35 Casing 36 Output shaft 37 Lever 39 Arm 40 Slider 41 Compression coil spring 42 Motor

Claims (6)

The door is provided with a substantially L-shaped lever portion having a rotation shaft and a slider that moves together with the spring and the protruding piece,
Provided with a lever receiver that accepts the one end portion with a restricting portion that allows movement while bringing one end portion of the lever portion into contact with the door frame and does not allow separation at the end portion,
The one end of the lever portion is movable in contact with the lever receiver,
The other end portion of the lever portion can be brought into contact with the spring or the protruding piece by moving the slider, and a rotational force is urged to the lever portion in a direction in which the lever portion opens. And
When receiving the one end of the lever portion in the lever receiver,
When the slider is moved so that the spring comes into contact with the other end portion of the lever portion, the one end portion of the lever portion does not come out of the restricting portion of the lever receiver due to the elastic force of the spring. Acting on the lever part,
When the slider is moved to a position where the distance between the spring and the other end portion of the lever portion is equal to or greater than a predetermined distance, the one end portion of the lever portion is moved to the lever when the door is moved in the opening direction. You can get out of the receiving control section,
When the slider is moved so that the protruding piece contacts the other end of the lever, the slider continues to move while the protruding piece contacts the other end of the lever. As a result, the one end portion of the lever portion comes out of the restricting portion of the lever receiver, and the door is opened.
It is comprised so that the door closing device characterized by the above-mentioned . The door closing device according to claim 1, wherein the lever portion includes a lever and an arm fixed at a substantially right angle to the lever . The door closing device according to claim 1 , wherein a roller is provided at the one end of the lever . The control part of the lever receiver is
From the closed state to the open state from the closed state to the predetermined angle, the one end portion of the lever portion is restricted so as not to come out of the restricting portion of the lever receiver, and the open state is wider than the predetermined angle. The door closing device according to any one of claims 1 to 3, wherein the one end portion of the lever portion is made of a regulating plate having a length that is pulled out from the regulating portion of the lever receiver . The door closing device according to any one of claims 1 to 4, wherein the slider is moved by driving a motor and can change its position . By moving the position of the slider to the first position,
The spring is brought into contact with the other end portion of the lever portion, and the one end portion of the lever portion is received by the restricting portion of the lever receiver to hold the door closed,
By moving the position of the slider to the second position,
The first gap is formed between the spring and the other end of the lever portion, and the one end of the lever can be opened to the first angle without coming out of the restricting portion of the lever receiver. A semi-locked state,
By moving the position of the slider to the third position,
A gap between the spring and the other end portion of the lever portion is set to a second interval larger than the first interval, and the one end portion of the lever portion does not come out of the restricting portion of the lever receiver, and the door is opened. A door guard locked state that can be opened to a second angle greater than the first angle;
By moving the position of the slider to the fourth position,
The gap between the spring and the other end of the lever portion is set to a third interval larger than the second interval, and the one end portion of the lever portion comes out of the restricting portion of the lever receiver, so that the door is fully opened. A release state that can be allowed to open to a state, and
By moving the position of the slider to the fifth position,
The projecting portion is brought into contact with the other end portion of the lever portion, and the one end portion of the lever portion is moved by continuing the movement of the slider while the projecting piece is in contact with the other end portion of the lever portion. An automatic open state in which the door is opened by being in contact with the lever receiver, as well as coming out of the restricting portion of the lever receiver,
The door closing device according to claim 5, further comprising a control unit that controls driving of the motor so that the motor can be made alternatively.

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