JPH0594474U - Door lock device - Google Patents

Abstract

(57) [Abstract] [Purpose] To realize a door lock device with a simple structure that can perform automatic locking of a shutter door and unlocking operation by remote control. A lever that is swingably supported near a door opening so that a swing end moves forward and backward along a movement locus of a hook provided on a shutter door, and the swing end of the lever is the movement locus. The lever is provided with a spring for urging the lever in an upward direction and an actuator for driving the lever in the retracting direction against the spring, and the swing center of the lever is in the door opening operation direction rather than the swing end portion. Is provided so as to enable automatic locking operation by sliding contact with the hook at the time of closing operation, and its swinging end portion faces the abutting portion of the hook at the door closing position. A locking portion is formed so as to maintain the locked state in the closed position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a door lock device suitable for automatically locking and unlocking a shutter door by remote control.

[0002]

[Prior Art]

 Shutter-type doors are often used as the rear doors of cargo trucks. This type of door device is constructed so that the shutter door is pulled up along the guide rail to the ceiling of the luggage compartment by a hoisting mechanism equipped with a spring as an auxiliary power, for example, so that opening and closing operations are easy. In addition, it does not require a space for door opening operation compared to the conventional double door structure and has excellent features such as high safety because it is not disturbed by a gust of wind.

By the way, as a door lock device for locking and unlocking such a shutter door, the door is automatically locked with the closing operation of the door, while the switch is operated to unlock electrically. There are some things I tried to get.

This type of door lock device improves the efficiency of loading and unloading work by automatically locking the door, and also has an electric control circuit for remote operation. It also has an advantage in crime prevention, such as being able to prohibit the unlocking operation from the outside by using the main switch on the driver's seat.

[0005]

[Problems to be solved by the device]

 However, this type of conventional door lock device enables automatic locking, and it is necessary to reliably maintain the locked state even when external force is applied to the door in the locked state, and at the same time, the electrical lock is performed. There is a tendency for the structure to be complicated as a result of the requirement to control the unlocking in order to increase the number of parts, especially for links and levers, which increases the cost. is there.

The present invention has been made in view of the above conventional problems, and an object thereof is to realize a door lock device capable of automatically locking and unlocking a shutter door by a remote operation with a simple structure. I am trying.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, according to the present invention, a shutter is provided on a shutter door so that an abutting portion faces the opening operation direction of the shutter door, and a swinging end moves forward and backward along a moving path of the hook. A lever that is swingably supported near the door opening, a spring that biases the lever in the direction in which its swing end is located on the movement path, and a lever that resists the spring. A door lock device is composed of an actuator that drives in the retreat direction.

Further, the lever is provided such that the swing center thereof is located in the door opening operation direction rather than the swing end portion, and the swing end portion is provided with a contact portion of the hook at the door closed position. The locking portions are formed so as to face each other.

[0009]

[Action]

 In the free state, the lever is urged by a spring to a position that crosses the movement path of the hook when the shutter door is opened and closed. If the door is closed in this state, part of the hook will slide on the side surface of the lever near the closed position and push it inward against the spring. When the door is further closed from this state and the hook is disengaged from the swinging end of the lever, the lever is released from the hook and returns to the initial position by the tension of the spring. As a result, the engaging portion of the lever swing end portion and the abutting portion of the hook face each other, and therefore, when an attempt is made to open the door from this state, the abutting portion of the hook hits the lever engaging portion and the movement is restricted. The shutter door is held securely closed.

On the other hand, when the shutter door is opened, the lever is forcibly retracted via the actuator. As a result, the constraint on the hook in the opening direction can be released, and the shutter door can be opened.

[0011]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1 or FIG. 2, 1 is a door lock device, 1A is a housing thereof, and 2 is a lever which is swingably supported by a shaft portion 3 fixed near the end of the housing 1A. Reference numeral 4 denotes a spring for urging the lever 2 in the counterclockwise direction (lock direction) in FIG. 1, and 5 has a built-in DC motor for driving the lever 2 in the clockwise direction (unlocking direction) against the spring 4. Actuator, 6 is a link mechanism for transmitting the driving force of the actuator 5 to the lever 2, 7 is a wire for manually forcibly rotating the lever 2 when the electric system fails, and 8 is a shutter door 9 It shows a hook attached to the back surface of the slat at the bottom end (see FIG. 4).

An opening 1B is formed on a side surface of the housing 1A so that a part of the lever 2 can project, and the lever 2 is based on a tension of a spring 4 interposed between the lever 2 and the shaft 3. Then, it is biased in the illustrated locking direction through the opening 1B. The end face (lower end) of the lever swing end is a locking portion 2A formed so as to face the hook 8 so as to lock the hook 8 in the closed position. Reference numeral 10 is a split pin for preventing the lever 2 from coming off.

The actuator 5 is for pulling the lever 2 against the spring 4 to the retracted position, and the arm 6A of the link mechanism 6 is fixed to the drive shaft thereof. The lever 6A is further connected to the lever 2 via a link 6B rotatably attached to the tip of the lever 6A. The link 6B is connected to the long hole 2B formed in the lever 2, and the play between the long hole 2B and the link 6B causes the lever 2 to be forcibly unlocked regardless of the operation of the actuator 5. I am able to evacuate to.

As a circuit for driving the actuator 5, for example, a main switch and a normally-open unlocking switch are provided in series in the middle of a circuit for supplying a 24 volt power source of a vehicle, and the actuators are closed when the switches are closed. 5 is activated and the lever 2 is pulled in. In this case, the main switch shall be installed in the driver's seat and the unlock switch shall be installed outside the vehicle near the shutter door.

The wire 7 has one end coupled to the vicinity of the lower end of the lever 2 and is drawn out toward the opening 1B via an inversion fulcrum 1C provided inside the housing 1.

FIGS. 3 and 4 show a state in which the door lock device 1 is attached to the vehicle carrier 11. As shown in FIG. 3, the door lock device 1 is positioned at the inner left and right lower end portions of the shutter door opening 11A. A pair of door lock devices 1 are installed in. Regarding the relationship with the hook 8 provided on the lowermost slat of the shutter door 9, the movement locus L of the hook 8 when the shutter door 9 is opened and closed crosses the locking portion 2A of the lever 2 and the shutter door 9 is moved. It is set so that the contact portion (upper end surface) 8A of the hook 8 is positioned directly below the locking portion 2A so as to face the hook 8 in a completely closed state (see FIG. 1). In FIG. 4, 12 is a guide rail of the shutter door 9 and 13 is a hoisting mechanism for assisting the opening operation of the shutter door 9.

To explain the operation, the lever 2 is urged by the spring 4 to a position that traverses the movement locus of the hook 8 when the shutter door 9 opens and closes in the free state as described above. .. At this time, if the shutter door 9 is closed, the abutting portion 8A of the hook 8 faces the lever locking portion 2A and is engaged with each other, so that the shutter door 9 cannot be opened.

To open the shutter door 9 from this state, the main switch of the driver's seat is turned on, and then the unlock switch outside the vehicle is turned on, the actuator 5 operates only during that time, and the link mechanism 6 is operated. Since the lever 2 is pulled to the unlocked position, in this state, the shutter door 9 may be pulled up to the position where the hook 8 is located above the lever 2. After that, when the unlock switch is released, the power supply to the actuator 5 is stopped, so the lever 2 automatically returns to the initial lock position by the tension of the spring 4, but at this time, the hook 8 has already been released. Since it is located above 2, the operation of the shutter door 9 is not restricted and can be freely opened to the fully open position.

Next, when the loading and unloading work of the luggage is completed and the door is closed, a part of the hook 8 is slidably contacted with the side surface of the lever 2 when the door is closed close to the closing position, and the spring 4 is pulled. It will be pushed inward against. Further, when the door is closed and the hook 8 is disengaged from the end of the lever 2, the lever 2 comes out of the sliding contact state with the hook 8 and returns to the initial position by the tension of the spring 4. As a result, the locking portion 2A of the lever 2 and the hook contact portion 8A are brought into a locked state in which the shutter door 9 is closed again.

An unlocking switch for unlocking the door lock device 1 is provided outside the vehicle, but since it is in series with the main switch of the driver's seat, the main switch is not turned on. As long as the unlock switch is operated, the door cannot be opened, which is intended to prevent crime and tampering.

[0022]

[Effect of the device]

 As described above, the present invention has a structure in which the door is automatically locked through the lever urged in the locking direction by the spring, while the lever is forcibly retracted through the actuator to unlock the door. Therefore, it is possible to realize automatic locking and unlocking operation by remote control via an electric circuit or the like with an extremely simple and low-cost configuration.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a side view of an embodiment of the present invention.

FIG. 3 is a rear view of the luggage compartment showing an applied state of the embodiment.

4 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 1 Door Lock Device 2 Lever 2A Locking Part 4 Spring 5 Actuator 6 Link Mechanism 8 Hook 8A Abutting Part 9 Shutter Door

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display area E06B 9/17

Claims (1)

[Scope of utility model registration request] 1. A hook provided on a shutter door so that an abutting portion faces the opening operation direction of the shutter door, and a hook near a door opening so that a swinging end moves forward and backward along a movement locus of the hook. A lever that is swingably supported, a spring that urges the lever in a direction in which the swing end portion is located on the movement path, and an actuator that drives the lever in the retracting direction against the spring. And the lever is provided such that its swing center is located in the door opening operation direction rather than the swing end, and the swing end has a contact portion of the hook at the door closed position. A door lock device, wherein locking portions are formed so as to face each other.