JPH083678Y2 - Locking device for large or heavy gates - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for a large gate or a heavy gate, and more specifically, it has a high degree of freedom in selecting an installation position, and even when a large load is applied to the locked gate. The present invention relates to a locking device for a large gate or a heavy gate that can withstand a load and maintain a locked state, and that has a simple structure and ensures reliable operation.

[0002]

2. Description of the Related Art Conventionally, as a method for opening and closing a large or heavy gate using an iron door or the like, a double door opening or double door opening method (FIGS. 9 (a) and 9 (b)), and a gate A moving back and forth on a rail. The method (FIGS. 9C and 9D), the method of raising and lowering the gate A (FIG. 9E), etc. are mainly adopted.
An example of such a gate locking mechanism is shown in FIG.
As shown in 0, a vertically long locking hole a is opened at the upper end of the gate A to be opened and closed, and on the other hand, the locking hole a can be inserted at the installation side B of the peripheral frame or the wall body facing the upper end of the gate A. Having a structure in which a locking device body C capable of protruding and retracting a columnar lock rod R is embedded, or a locking device having a lock rod R that is recessed and protruded in the lower part of the gate A as shown in FIG. For example, the main body C is embedded and a lock hole a is formed on the installation side B facing the lower end of the other gate.

The most classic mechanism for retracting the lock rod R in the locking device body C is shown in FIG. This is based on a so-called rack and pinion mechanism in which a lock rod R having a linear gear cut on a side surface is engaged with a rotary gear related to an electric motor M, and the electric motor M is rotated normally or reversely. Thus, the lock rod R is moved up and down.

However, in this mechanism, since the lock rod R is constantly engaged with the electric motor M, if the electric motor M does not operate due to a power failure or an accident, the lock is released manually. There is a problem that cannot be done. Further, the lock rod R has a single annular guide g.
Although the structure is guided by, when the gate in the locked state is pressed in the opening direction, this structure cannot withstand a large lateral pressure acting on the lock rod R, and the locking device is damaged or operates. Sometimes it caused a defect. Furthermore, since this mechanism requires forward and reverse rotation of the electric motor, not only is the electric wiring to the electric motor complicated, but it is not possible to use an inexpensive electric motor for exclusive use in one-direction rotation. There was also a problem that it was difficult to reduce the cost.

A mechanism shown in FIG. 12 has also been proposed as a mechanism for raising and lowering a lock rod which solves such a drawback. This is provided with a pressure receiving wall d projecting on the upper peripheral wall of the lock rod R for receiving the pushing-up force, while a locking groove e is formed on the lower peripheral wall, and the lock rod R slides on the annular guide g. Insert it as much as possible to regulate its movement direction,
In addition, an electric motor M having an eccentric cam f attached to a rotary shaft at a side position of the lock rod R is arranged in a positional relationship such that the eccentric cam f can push up the pressure receiving wall d while rotating. By pushing up the pressure receiving wall d, the lock rod R is configured to move upward against its own weight. The lower end surface of the lock rod R is pressed against the free end side of a pin-shaped spring body p, one of which is a fixed end h and the other of which is a free end i. When the pin-shaped spring body p is engaged with the locking groove e, the lock rod R is held in the unlocked posture, and the pin-shaped spring body p is engaged with the locking groove e. When the lock rod R is released, the lock rod R is lowered by its own weight to be in a locked state.

The pin-shaped spring body p is released from the locking groove e automatically when the gate is closed. This concrete structure is, as shown in the drawing, the lock rod side. The end portion of the sliding rod j arranged horizontally in the portion is pressed against the free end side of the pin-shaped spring body p, while the other end of the sliding rod j is moved to the locking device main body C as shown in FIG. It is configured to be exposed from the side wall of the surrounding case k, and when the gate is closed, the exposed end of the sliding rod j is shown in FIG.
The sliding rod j is horizontally moved to release the engagement state of the pin-shaped spring body p by contacting the door stop plate D for defining the closing position of the gate A as shown in FIG. It also has the function of releasing the locked state and the function of detecting the door closed state.

[0007]

According to the locking device of this type, the rotating eccentric cam f rotates the lock rod R while it is rotating.
The lock rod R can be raised by pushing up the pressure receiving wall d of the lock rod R from below, and the pin-shaped spring body p holds the state of the lock rod R at the ascending / descending position. Since it has a free relationship with M that does not mesh, even if the electric motor M does not operate due to a power outage or accident, by separately incorporating an auxiliary manual mechanism inside the locking device body, There is an advantage that it can be unlocked and locked manually.

However, since the lock rod R is only partially supported by the single annular guide g, with respect to the durability against the side pressure acting on the lock rod R, the conventional example using the rack and pinion mechanism described above is used. It remains vulnerable as well. Further, according to this method, the locking groove e on the outer periphery of the lock rod of the pin-shaped spring body p is
Since the sliding rod j is applied to the door stop plate D that defines the closing position of the gate, the sliding rod j has the advantage that the lowering timing of the lock rod R can be automatically performed. The exposed end of j must be arranged at a position where it comes into contact with the door stop plate D when the gate is closed. Therefore, the degree of freedom in arranging parts inside the main body of the locking device is greatly restricted, and the sliding rod j is The existence of the door stop plate D for pressing and moving has become indispensable and has been a limiting factor in the design of the gate structure.

The present invention has been made in view of the current situation, and is capable of withstanding a large lateral pressure acting on the lock rod, and has a degree of freedom in arrangement of parts inside the main body of the locking device and a design of the gate structure. There is a high degree of freedom, and it is also possible to respond to manual operation at the time of power outage or accident,
In addition, it is an object of the present invention to provide a locking device for a large gate or a heavy gate, which has a simple structure and can be provided at low cost.

[0010]

In order to solve the above problems, the present inventor has conducted extensive studies and, as a result, has a structure of a guide holding means for a lock rod that can withstand a lateral pressure acting on the lock rod, and a pin. The present invention has been completed based on the idea of a structure that does not depend on a mechanical method using a sliding rod as a method of releasing the engaged state of the spring body.

According to the present invention, which solves the above-mentioned problems, a lock rod protruding and retracting from the case, a retracting guide means for the lock rod, a driving means for moving the lock rod in a longitudinal direction, and a lock rod are provided inside a case for enclosing the apparatus body. State holding means for holding the state after movement of the door and movement end state detection means for detecting the state where the lock rod has reached the movement end position, and the door opening / closing for detecting the open / closed state of the door inside or outside the case The lock rod is provided with a detecting means, and the lock rod is held by a pipe-shaped retracting guide means while being biased in a predetermined direction by its own weight or a pressurizing means. The pressure receiving wall that receives the transmission and the state in which the lock rod holds the stopped posture in the maximum exposed state or the fully retracted state A holding means engaging portion for engaging the holding means is provided, and the driving means is configured by attaching a driving force transmission body having an eccentric cam shape to the rotation shaft of the electric motor, and the driving force transmission body is provided with the driving force transmission body described above during rotation. A pressure receiving wall pressing portion for pressing the pressure receiving wall to move the lock rod to the starting end side, and a holding means releasing portion for releasing the engagement relationship between the state holding means and the lock rod during the rotation are formed, and the moving end state The detection means also has a function of detecting the moving end position of the ascending / descending lock rod and controlling the drive means by the detection signal, and the movement of the lock rod to the starting end side and the release of the holding means are performed by a single electric motor. The feature is that it is performed by a one-way rotation operation by a motor.

[0012]

The outline of the operation mode of the locking device having the above-mentioned structure is as follows. Here, as shown in FIG. 1, the main body of the locking device is incorporated into the lower part of the door, the locking hole a is bored in the installation-side frame opposite to the lower end surface of the door, and the lock rod R is opened when it is lifted. An example will be described in which the locked state is set and the locked state is set when the lock rod R is lowered.
Depending on the mounting position of the locking device body C, the lock rod R may be in the locked state when the lock rod R is in the raised state. Further, the moving direction of the lock rod R may be not only the vertical direction but also the horizontal direction depending on the structure of the door.

First, when the door is open, the lock rod is submerged inside the case. Inside the case, the lock rod is held by the pipe-shaped retracting and guiding means, and the state holding means is engaged with the holding means engaging portion formed on the side wall of the case, whereby the raised state of the lock rod is maintained.

Next, when the door is closed,
The door opening / closing detection means that detects this state sends a signal to rotate the electric motor, and the holding means release portion of the driving force transmission body that rotates with the rotation of the electric motor is in the process of rotation and the relationship between the lock rod and the state holding means. Release the lock state and lower the lock rod. The lowered lock rod is fitted into the locking hole formed on the installation side to be locked. The movement end state detection means that detects that the lock rod has reached the descent end position sends a rotation stop signal to the electric motor to stop the rotation of the electric motor. The moving end state detecting means for detecting that the lock rod has reached the lowering end position can be constituted by a limit switch.
It is also possible to operate the timer simultaneously with the rotation of the motor to control the lower end position of the lock rod according to the rotation time of the motor, or to control the lower end position of the lock rod using a sensor that detects the amount of rotation of the motor. it can.

When the door in the closed state is opened, a rotation command is given to the electric motor. Then, the eccentric cam-shaped drive force transmitting body rotates in a certain direction, and the pressure receiving wall pressing portion on the drive force transmitting body pushes up the pressure receiving wall of the lock rod to raise the lock rod during the rotation, and the lock rod is moved from the locking hole. Pull out. When the lock rod rises and reaches the movement end position, the state holding means automatically engages with the holding means engaging portion of the lock rod, and on the other hand, the movement end state detection means which detects that the movement end has been reached is detected. The rotation stop command is sent to the electric motor, the rotation of the driving force transmission body is stopped, and the retracted state of the lock rod inside the case is maintained.

As described above, in the locking device, the raising operation of the lock rod and the release of the holding state of the lock rod held at the upper start position are performed in the same rotation direction of the driving force transmission body attached to the single electric motor. Since the rotation operation of the electric motor for releasing the holding state of the lock rod can be controlled by turning on and off the electric contacts, various types of movement end state detecting means are adopted. It will be possible. In addition, since the lock rod's retracting operation is held by the pipe-like retracting guide means, even if a large lateral pressure acts on the lock rod, it is possible to sufficiently withstand this lateral pressure, and it has excellent durability and is suitable for large gates. A suitable locking device can be provided.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, details of the present invention will be described based on illustrated embodiments. 1 (a) and 1 (b) show a state in which the locking device of the present invention is incorporated inside a door, (a) shows a door open state, and (b) shows a door closed state. In the figure, A is a door, E is a bottom plate portion of the frame body fixed to the installation side, and the frame body E is provided with a locking hole a. The upright portion shown as D in the figure is a door-stop portion that regulates the closed position of the door A. In the figure, C is a lock device built in the lower part of the inside of the door, and the lock rod R is incorporated in the lock device C so that it can be retracted from the lower edge of the door. The locking device of the present invention controls the raising and lowering of the lock rod R to maintain the closed state of the door or permit the opening of the door. In the example shown in the figure, the locking device C is attached to the lower part of the inside of the door, but the locking device C can be attached to the upper part of the inside of the door, and is further attached to the peripheral frame or the wall side surrounding the door. It is also possible. In the following description, a locking device that is attached to the lower part of the door and used will be mainly described, but the present invention is not limited thereto.

The appearance of the locking device of the present invention is shown in FIG. 2, for example, and the outline of the internal structure is shown in FIG. This locking device has a configuration in which a vertically movable lock rod R, a lifting mechanism U for the lock rod R, and an electric motor M as a drive source are housed in the same case k.
The surrounding structure is shown in FIG.

The metal lock rod R has a structure in which a pressure receiving wall 1 is formed so as to project from the upper peripheral surface, and a lateral groove 2 as a holding means engaging portion is engraved on the lower side of the pressure receiving wall 1. The lock rod R is held by the metal pipe 4 having the window 3 on the side surface. The pressure receiving wall 1 is positioned in the window portion 3 of the metal pipe 4 as the retracting guide means, and the lock rod R can be moved up and down by pushing up the pressure receiving wall 1 within the range of the window portion 3. . Further, a slit 5 is formed at a side surface position of the metal pipe 4, and a substantially middle portion of a pin-shaped spring body 6 as a state holding means is fitted into the slit 5 in a pressed state, and the lock rod R is raised. Then, when the lateral groove 2 formed on the peripheral surface of the lock rod overlaps the slit 5, the free end side of the pin-shaped spring body 6 engages with the lateral groove 2 in a state of penetrating the slit 5 so that the lock rod R It is configured to be able to maintain the stopped state in the ascending position. Here, the pin-shaped spring body 6 is used as the state holding means and the lateral groove 2 is used as the holding means engaging portion, but it can be released by the rotation operation of the driving force transmission body 7 attached to the electric motor M. If so, it is also possible to employ another state holding means or another holding means engaging portion corresponding to the state holding means.

In the figure, M is an electric motor as a driving means, and an inexpensive motor that can rotate only in one direction is used.
A driving force transmission body 7 is attached to the rotary shaft 8 of the electric motor M. The driving force transmission body 7 has an eccentric cam shape,
A pressure receiving wall pressing portion 9 and a holding means releasing portion 10 are formed on opposite sides with the rotary shaft 8 interposed therebetween. The pressure receiving wall pressing portion 9 is for pushing up the pressure receiving wall 1, and is formed by projecting a rotating body so that the pushing operation can be smoothly performed. Further, the holding means releasing portion 10 is for releasing the engagement relationship between the pin-shaped spring body 6 and the lateral groove 2 of the lock rod R by pushing back the free end of the pin-shaped spring body 6 against its elastic force. And has an arcuate portion as a portion for pressing the pin-shaped spring body 6. Then, while the driving force transmitting body 7 is being rotated, the free end of the pin-shaped spring body 6 is pushed away by the arc-shaped portion, and the pin-shaped spring body 6 that has passed over the arc-shaped portion is returned to the slit position. In the present embodiment, the driving force transmitting body having the above-mentioned shape is used, but the shape of the driving force transmitting body is not limited to this, and the upward movement of the pressure receiving wall 1 and the release of the pin-shaped spring body 6 from the lateral groove 2 are performed. Other configurations can be used as long as they are possible. In the illustrated example, the pressure receiving wall pressing portion 9 and the holding means releasing portion 10 are formed on the opposite sides of the rotary shaft 8, but the pressure receiving wall pressing portion 9 and the holding means releasing portion 10 should be formed on the same side. Alternatively, it is also possible to adopt a configuration in which both are shared.

In the figure, reference numeral 11 denotes a moving end state detecting means for detecting a state where the lock rod R has reached the moving end position. The moving end state detecting means 11 is composed of a limit switch composed of a micro switch, and the switch is turned on.
By positioning the tip of the long pin body 11a to be N-OFF on the upper surface of the pressure receiving wall 1, it is possible to detect the state where the lock rod R reaches the ascending end position.
The moving end state detecting means 11 detects that the lock rod R has reached the rising end position.
Although not shown, state holding means for detecting that the lock rod R has reached the descending end position is also provided separately.
As the moving end state detecting means for detecting that the lock rod has reached the descent end position, a timer or a sensor for directly detecting the rotation amount of the motor can be used as well as a micro switch, for example, a motor. It is also possible to operate the timer at the same time as the rotation, to control the descent end position of the lock rod by the rotation time of the motor, or to control the descent end position of the lock rod by the rotation amount of the motor.

In the middle of the power supply line to the electric motor M, a door opening / closing detecting means 12 for detecting a closed state of the door and issuing a rotation command to the electric motor M to lower the lock rod R, and a door opening. A command switch 13 is provided for giving a rotation command to the electric motor M for the purpose of sometimes raising the lock rod R. The door opening / closing detection means 12 can be installed inside the case or outside the case as long as the opening / closing of the door can be detected. For example, when installing inside the case, as shown in FIG. A sliding rod 14 that is pushed and moved when the door is closed is provided, and a micro switch 12a is arranged at the tip of the sliding rod 14, or an optical sensor, a magnetic sensor, an ultrasonic sensor, or the like is provided, and the sliding rod 14 is installed on the door. It can be used as an open / close detection means, and when it is installed outside the case, as shown in FIG. 7B, a contact sensor such as a micro switch, an optical sensor, a magnetic sensor, or a non-contact such as an ultrasonic sensor. The installation position of the mold sensor can be extended to a predetermined position through the lead wire. Therefore, for example, as shown in FIG. 8, the locking device main body C can be built in the inside lower part of the door, while the door opening / closing detecting means 12 can be arranged at the door side end.

The mode of operation of such a locking device is as follows. First, when the door is open, the lock rod R
Is submerged inside case k. While the lock rod R is held by the metal pipe 4 inside the case,
The pin-shaped spring body 6 penetrating the slit 5 of the metal pipe 4 engages with the lateral groove 2 formed on the side wall thereof, so that the rising state of the lock rod R is maintained.

Then, when the door is closed,
A door opening / closing detection means 12 composed of a micro switch or various non-contact sensors arranged inside or outside the case emits a signal to operate the electric motor M to rotate the eccentric cam-shaped driving force transmission body 7 in a certain direction, The driving force transmission body 7 that has started to rotate has a circular arc-shaped holding means releasing portion 1 during the rotation.
0 pushes away the free end of the pin-shaped spring body 6 that is in communication with the slit 5 of the metal pipe 4 and the lateral groove 2 of the side wall of the lock rod R, and releases the engagement relationship of the pin-shaped spring body 6 with the lock rod R. Then, the lock rod R is lowered. The lock rod R lowered by its own weight is fitted into a locking hole formed on the installation side to be in a locked state. The fact that the rotation lock rod R has reached the descent end position is detected by a moving end state detecting means (not shown), and the moving end state detecting means sends a rotation stop signal to the electric motor M to stop the rotation of the electric motor M. Let At this time, the holding means releasing section 10
Has passed over the pin-shaped spring body 6, and the pin-shaped spring body 6 has also returned to the inside of the slit 5, but since the lock rod R is already in the lowered state, It does not engage. In this state, the device is locked and prevents the gate from opening. When a force in the opening direction acts on the gate in this state, lateral pressure acts on the lock rod R, but in the present device, the lock rod R is held in a wide area on its side surface by the metal pipe 4, so that a large force is exerted. The locked state can be reliably maintained even against lateral pressure.

When the door in the closed state is opened, the command switch 13 is operated to give a rotation command to the electric motor M to give an eccentric cam-shaped driving force transmitting member 7.
By rotating the pressure receiving wall pressing portion 9 during rotation.
Thus, the pressure receiving wall 1 of the lock rod R is pushed up to raise the lock rod R, and the lock rod R is pulled out from the lock hole. When the lock rod R moves up to reach the movement end position,
The movement end state detection means 1 detects that the pin-shaped spring body 6 is engaged with the lateral groove 2 on the side wall of the lock rod while penetrating the slit 5 of the metal pipe 4, and the end of the movement is detected.
1 sends a rotation stop command to the electric motor M, and the retracted state of the lock rod R inside the case is maintained. Although not shown, the present apparatus may have a built-in auxiliary manual mechanism for manually releasing the locked state when the operating state of the electric motor M is impaired due to a power failure or an accident. In the device of the present invention, the lock rod R and the drive shaft of the electric motor M are not meshed with each other and are always in a free state. Therefore, the locking and unlocking operations by the auxiliary manual mechanism are easy.

[0026]

EFFECT OF THE INVENTION The locking device according to the present invention is used to raise the lock rod and release the holding state of the lock rod held at the upper start position in the same rotation of the driving force transmitter attached to a single electric motor. Since the lock rod is released by the directional operation, it can be released by controlling the power supply to the electric motor, and the command for releasing the lock rod is released by a micro switch or various sensors. The position of these microswitches and various sensors can be set arbitrarily as long as it can detect the closed state of the door. Also, there is no restriction on the arrangement position of the locking device itself.

Further, in this locking device, since the side surface of the lock rod is held in a wide range by the pipe-shaped retracting guide means, a force in the opening direction acts on the door in the locked state, and a large lateral pressure acts on the lock rod. The lock rod can withstand this lateral pressure even when
It is possible to provide a locking device that has excellent durability and is suitable for large gates.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view of a gate incorporating the locking device of the present invention, (a) being in an open state and (b) being in a closed state.

FIG. 2 is a perspective view showing the external appearance of one embodiment of the locking device of the present invention.

FIG. 3 is a simplified explanatory view showing the outline of the internal structure of one embodiment of the locking device of the present invention.

FIG. 4 is a simplified explanatory view showing a mechanism around a lock rod in one embodiment of the locking device of the present invention.

FIG. 5 is an explanatory front view showing the relationship between the lock rod and the driving force transmission body.

FIG. 6 is an explanatory side view showing the relationship between the lock rod and the driving force transmission body.

FIG. 7 shows an example of installation of door opening / closing detection means, where (a) is installed inside the case and (b) is installed outside the case.

FIG. 8 is an explanatory view showing another embodiment of the installation example of the locking device of the present invention.

9 (a) to (e) are explanatory views showing the structures of various gates which are intended for the locking device of the present invention.

10 (a) and 10 (b) are explanatory views showing an example of attaching the locking device to the gate.

FIG. 11 is an explanatory view showing an example of a lock rod elevating mechanism in a conventional locking device.

FIG. 12 is an explanatory diagram showing another example of a lock rod lifting mechanism in a conventional locking device.

FIG. 13 is a perspective view showing the appearance of a conventional locking device.

FIG. 14 is a sectional view of a main part of a gate incorporating a conventional locking device.

[Explanation of symbols] C Locking device R Lock rod M Electric motor 1 Pressure receiving wall 2 Lateral groove 3 Window portion 4 Metal pipe 5 Slit 6 Pin-shaped spring body 7 Driving force transmitting body 8 Rotating shaft 9 Pressure receiving wall pressing portion 10 Holding means releasing portion 11 Moving end state detecting means 12 Door opening / closing detecting means 12a Micro switch 13 Command switch 14 Sliding rod

Claims (2)

[Scope of utility model registration request] 1. A device which is attached to one of a gate to be opened and closed and a peripheral frame or a wall on an installation side which surrounds the outer periphery of the gate, wherein a lock rod capable of appearing and retracting in a locking hole formed in a facing other side. In a locking device for a large gate or a heavy gate that is inserted to firmly maintain the closed state of the gate, a lock rod that emerges from the case inside the case that covers the main body of the device, a means for guiding the appearance of the lock rod,
A drive means for moving the lock rod in the longitudinal direction, a state holding means for holding the state after the movement of the lock rod, and a movement end state detection means for detecting the state where the lock rod reaches the movement end position are built in, and a case is included. It has a door open / close detection means for detecting the open / closed state of the door inside or outside, and the lock rod is held by the pipe-shaped retractable guide means in a state of being biased in a predetermined direction by its own weight or pressurizing means. Holding means for engaging a pressure receiving wall that receives the transmission of the driving force from the driving means at a proper position on the side surface of the lock rod, and a state holding means for holding a stop posture in a state where the lock rod is fully exposed or completely retracted. An engaging portion is provided, and the driving means is configured by attaching a driving force transmitting body having an eccentric cam shape to the rotating shaft of the electric motor. On the body, a pressure receiving wall pressing portion that presses the pressure receiving wall during rotation to move the lock rod to the starting end side, and a holding means release portion that releases the engagement relationship between the state holding means and the lock rod during rotation. The moving end state detecting means has a function of detecting the moving end position of the ascending / descending lock rod and controlling the driving means by the detection signal, and moving and holding means of the lock rod toward the starting end side. Locking device for large-scale gates or heavy-duty gates, which is unlocked by unidirectional rotation with a single electric motor. 2. A lock for a large gate or a heavy gate according to claim 1, wherein a cam-shaped eccentric body is used in which a pressure receiving wall pressing portion and a holding means releasing portion are opposed to each other with a rotary shaft of an electric motor interposed therebetween. apparatus.