JP2000087612A - Door looking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the operational stability even in a solenoid with weak force, and facilitate the adjustment in a door locking device. SOLUTION: The door locking device is provided with a receiving seat installed in a door 1, and a door holding mechanism 12 fitted to the receiving seat provided in the housing position of the door for holding the door; and the door holding mechanism is provided with a roller 14 to be fitted to the receiving seat, an enerizing means 15 for projectingly energizing the roller 14, and an unlocking means 16 for releasing the enerizing of the roller. The energizing means 15 is provided with a lock lever 20 energized by an operating spring 21 so that the other end thereof presses the roller 14 in the projecting direction in the condition that one end is locked and the pressing pressure is released in the condition that one end is released, and a locking member 22 for locking the lock lever 20. Further, the unlocking means 16 is provided with an unlocking lever 26 energized by an unlocking spring 25 toward the locking member 22, an operating lever 27 for locking the unlocking lever 26, and a solenoid 28 move to be set so as to the operating lever 27 and hit the unlocking lever 26 against the locking member 22 at the time of operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock device for holding a fire door or the like in a storage position.

[0002]

2. Description of the Related Art Fire doors and the like having one side rotatably provided on a wall or the like of a building are normally stored in a storage position provided near the wall, and are stored in an emergency. It turns from the position in the closing direction (the direction in which the door is moved out of the storage position) to close a passage or the like. Fire doors and buildings
Generally, a door lock device is provided as an openable / removable holding means, and the fire door is generally locked at a storage position and held open in a normal state.

[0003] Conventionally, for example, a door lock device proposed in Japanese Patent Application Laid-Open No. 7-119346 is known. This door lock device, as shown in FIGS. 10 and 11,
A receiving seat 2 provided on a fire door 1 rotatably supported by a door closer (not shown) or the like, and a fire door 1
And a door holding mechanism 4 which is provided on the wall 3 facing the storage position S and which fits with the receiving seat 2 when the fire door 1 is stored to open and hold the fire door 1 at the storage position S.

[0004] The receiving seat 2 is a member on a substantially flat plate having a concave portion 2a formed in a central portion with a concave curved surface,
The side surface opposite to the concave portion 2 a is fixedly provided on the upper end surface of the fire door 1 with the concave portion 2 a as an upper surface. The door holding mechanism 4 includes a roller 5 that can be fitted into the concave portion 2a,
And a lock lever 7 that urges the roller 5 downward by the urging force of the operation spring 6. The lock lever 7 is provided above the inner surface of the storage position S of the fire door 1 formed on the wall 3.
Is held so as to protrude downward from the ceiling surface of the camera.

In this door lock device, a solenoid 9 is connected via an operating lever 10 to a link member 8 connected to the lock lever 7 and supporting the lock lever 7. That is, when the solenoid 9 is operated to release the holding of the fire door 1, the operating lever 10 moves to pull the link member 8, and the support of the lock lever 7 is released, so that the lock lever 7 operates. It is set to rotate by the urging force of the spring 6 and release the urging to the roller 5.

[0006]

However, the above-described conventional door lock device has the following problems. That is,
When the solenoid 9 is operated to release the holding of the fire door 1, the link member 8 is directly pulled by the solenoid 9 to release the support of the lock lever 7, so that a solenoid that generates a strong force for releasing the support is generated. 9 must be provided. In other words, a solenoid with a sufficiently large force was required to perform stable operation. However, from the viewpoint of downsizing of the device and cost reduction, it is demanded that a solenoid with relatively weak force can ensure operation stability. It had been.
In addition, the link mechanism by the link member is positionally unstable to support and release the lock lever,
There was an inconvenience that adjustment was difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem, and has as its object to provide a door lock device which has high operation stability even with a solenoid having a small force and is easily adjusted.

[0008]

The present invention has the following features to attain the object mentioned above. That is, in the door lock device according to the first aspect, the receiving seat provided on the door which is supported to be openable and closable, and the receiving seat provided at the storage position of the door and fitted with the receiving seat when the door is stored to store the door. A door lock device having a door holding mechanism for holding the door in a position, wherein the door holding mechanism is capable of rolling in a direction along a moving direction of the door and being fittable to the receiving seat; An urging means for urging the roller by projecting so as to be fitted to the receiving seat, and an unlocking means for releasing the urging of the roller by the urging means, wherein the urging means has one end. A lock biased by an operation spring so that the other end presses the roller in the protruding direction in the locked state, and releases the pressing by the other end in a state where one end is opened. A lever, and a locking member for locking one end of the lock lever. The unlocking means is connected to the unlocking lever locked by being biased by an unlocking spring toward the locking member, an operating lever for locking the unlocking lever, and an operating lever. A solenoid configured to move the operating lever during operation to release the unlocking lever and strike the locking member to move the locking member to release the locking of the lock lever. Technology is adopted.

In this door lock device, the unlocking means includes an unlocking lever locked in a state of being urged by an unlocking spring toward the locking member, and an operating lever for locking the unlocking lever. A solenoid connected to the operating lever, configured to move the operating lever at the time of operation to open the unlocking lever, and to strike the locking member to move the locking member to release the locking of the lock lever; When the solenoid is operated, the operating lever moves to release the lock of the unlocking lever, and the unlocking lever is hit against the locking member by the urging force of the unlocking spring. At this time, the locking member that has locked the lock lever is released by the struck impact, one end of the lock lever is opened, and the pressing on the roller is released. That is, the operation of the solenoid is for opening the unlocking lever, and the force used to actually release the locking of the lock lever by the locking member is the unlocking force of the unlocking lever hitting the locking member. The biasing force of the spring. Therefore, the operation of the solenoid is merely a trigger for releasing the bias of the roller, and if the unlocking of the unlocking lever can be released even if the force of the solenoid itself is weak, the strong biasing force of the unlocking spring will ensure the operation. The lock of the lock lever can be released. Further, the adjustment can be easily made only by changing the unlocking spring and changing the urging force.

According to a second aspect of the present invention, in the door lock device according to the first aspect of the present invention, the unlocking of transmitting the signal for releasing the operation of the solenoid upon detecting that the lock lever is unlocked is released. A technology is provided in which a detection switch is provided, and the unlock detection switch is installed at a position where the unlocking lever comes into contact with the unlocking lever when the locking member is moved by moving the locking member.

In this door lock device, the unlock detection switch is installed at a position where it comes into contact with the unlock lever when the unlock lever is hit against the lock member and the lock member moves. As soon as the lock of the lock lever is released, the unlock lever comes into contact with the unlock detection switch and the switch is turned on, so that the operation of the solenoid can be automatically released.

According to a third aspect of the present invention, in the door locking device according to the first or second aspect, the unlocking means is configured such that one end is connected to the operating lever and the other end is moved to move the unlocking means. A technique including an operation rod set to move the operation lever in a direction to release the locking of the unlock lever is adopted.

In this door lock device, the unlocking means is set such that one end is connected to the operating lever and the other end is moved to move the operating lever in a direction to release the locking of the unlocking lever. With the operating rod, the lock lever can be manually unlocked and unlocked simply by moving the other end of the operating rod without operating the solenoid. Become.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a door lock device according to the present invention will be described below with reference to FIGS. In these figures, reference numeral 11 denotes a receiving seat, 12 denotes a door holding mechanism, 13 denotes a casing, 14 denotes a roller, 15 denotes an urging means, 16 denotes an unlocking means, and 17 denotes a detecting means.

FIG. 5 shows a door lock device according to this embodiment.
As shown in FIG. 2, a receiving seat 11 provided on a fire door 1 rotatably supported by a door closer (not shown) or the like, and a wall 3 facing a storage position S which is a door pocket of the fire door 1.
And a door holding mechanism 12 that fits with the receiving seat 11 when the fire door 1 is stored and holds the fire door 1 in the storage position.

As shown in FIGS. 1 to 5, the door holding mechanism 12 is housed in a casing 13 fixed in a buried state on the inner upper surface of the storage position S. A roller 14 that is rollable in the direction along which the roller 14 can be fitted to the receiving seat 11, an urging unit 15 that protrudes and presses the roller 14 so that it can be fitted to the receiving seat 11, and the urging unit 15. An unlocking means 16 for releasing the bias of the roller 14 and a detecting means 17 for detecting whether or not the fire door 1 is held are provided.

As shown in FIG. 6, the casing 13 has a casing body 18 integrally formed by die casting.
And a lid 19 that covers the upper part of the casing body 18.

Conventionally, an iron plate is used as the casing body. However, if the casing is forcibly attached without slightly adjusting the pitch of the attachment position, the casing may be bent due to insufficient strength. there were. In addition, since a simple iron plate is used, many components such as screws are required to fix the components to be built in. However, if the casing body 18 integrally formed by die casting is employed as in the present embodiment, higher strength can be obtained, the above-described bending does not occur, and various shapes can be provided inside, and the fixing of parts can be performed. And the number of parts such as screws can be reduced.

As shown in FIG. 1 to FIG. 4, the urging means 15 has the one end 20a locked and the other end 20b
And a lock lever 20 urged by an operation spring 21 so as to press the roller 14 in the protruding direction, and to release the pressing by the other end 20b while the one end 20a is open. One end 20 of lever 20
and a lock fitting (locking member) 22 that locks a.

A cylindrical roller holder 23 is attached to the other end 20b of the lock lever 20 so as to be rotatable with respect to the axis of the casing 13 in the width direction (hereinafter, simply referred to as "width direction"). The roller 14 is rotatably mounted below the roller holder 23. The roller holder 23 is vertically movably disposed in a guide hole 18 a formed vertically through the casing body 18.

In the fixed state (open holding state) of the fire door 1 in the door pocket, the lock lever 20 is slightly moved from the fulcrum A to one end with the fulcrum A at the lower part of the middle part abutting against the bottom surface of the casing body 18. It is urged downward by an operation spring 21 abutting on the side 20a. The operation spring 21 is externally inserted into a support member 24 erected from the bottom of the casing main body 18, and the lower part thereof is provided with a lock lever 20.
And pressed against it.

A lock pin 20c of a support shaft is fixed to one end 20a of the lock lever 20 so as to have an axis in the lateral width direction.
2, the lock lever 20 is held in a locked state. As a result, the lock lever 20 pushes down the roller holder 23 at the other end portion 20b, and presses the roller 14 against the receiving seat 11 on the fire door 1 side to keep the door open. As shown in FIG. 2, the side portion of the lock lever 20 is sandwiched and guided in a slightly separated state by a pair of lever guide portions 18b formed so as to protrude inward from both sides in the casing main body 18. ing.

The unlocking means 16 includes an unlocking lever 26 locked in a state of being urged by an unlocking spring 25 toward the lock fitting 22, and an operating lever 27 for locking the unlocking lever 26. When the operation lever 27 is connected to the operation lever 27, the operation lever 27 is moved at the time of operation to release the unlocking lever 26, and at the same time, the lock metal 22 is moved by hitting the lock metal 22 so that the lock of the lock lever 20 is released. Solenoid 28 provided.

As shown in FIG. 6, the solenoid 28 is electrically connected to an external power supply (not shown) and a sensor (not shown) for detecting a fire by a wire L. , Operated by signals from sensors. A reset spring 28b that urges the plunger 28a in a pushing direction is wound around the plunger 28a of the solenoid 28. As shown in FIGS. 1 to 4, one end of an operating lever 27 is connected to the plunger 28a, and the other end of the operating lever 27 is formed with a long hole 27a that is long in the forward and backward directions. . A bracket 29 having a U-shaped cross section is fixed to the bottom surface of the casing body 18.
, A front pin 29a penetrating through the elongated hole 27a is fixed with an axis in the lateral width direction. The front pin 2
Reset fittings 30 are rotatably attached to both ends of 9a.

At the lower part of the lock fitting 22, a fitting pin 2 having an axis in the lateral width direction and fixed to a bracket 29 is provided.
2a penetrates, and the lock fitting 22 is supported rotatably about the fitting pin 22a. The lock fitting 22 is formed in a U-shape in cross section having an upper surface having a flat portion 22b, and the flat portion 22b is formed in a portion separated from the portion for locking the lock lever 20 toward the solenoid 28 side.

The unlocking lever 26 is rotatably mounted on the bracket pin 22a, and the unlocking pin 26a is fixed to the operating lever 27 with an axis in the width direction. Are locked and held at one end of the operation lever 27. Both ends of the unlocking pin 26a penetrate through a long hole 30d formed in the reset fitting 30, and are arranged to be vertically movable. The upper part of the unlocking lever 26 is formed in a U-shaped cross section, and the upper part of the roller 1
4 is formed with a protruding portion 26 b protruding toward the flat portion 22 b of the lock fitting 22.
On the 8th side, a switch flat portion 26c is formed.

The unlocking lever 26 is connected to the metal pin 22a.
26b by the unlocking spring 25 wound around
Are held in a state of being urged toward the flat portion 22b of the lock fitting 22. Further, the lock fitting 22 is urged toward the lock pin 20c by a return spring 31 wound around the fitting pin 22a. An unlock detection microswitch (unlock detection switch) 32 that detects the release of the lock of the lock lever 20 and sends a signal for releasing the operation of the solenoid 28 on the solenoid 28 side of the switch flat portion 26c. Is installed.

The unlock detection microswitch 32 includes a switch lever 32a having a tip abutting against a switch flat portion 26c. When the switch lever 32a is pushed toward the solenoid 28, the switch lever 32a is used. Switch knob 32b of unlock detection micro switch 32
Is pressed so that the switch is turned on. When the unlock detection microswitch 32 is turned on, the power supply circuit (not shown) for operating the solenoid 28 is shut off, the holding release confirmation circuit is closed, and a release signal is transmitted to the outside. Have been.

The reset fitting 30 is formed in a U-shape in vertical section having a lower surface 30b on the roller 14 side, and is located above the lower surface 30b and one end 20a of the lock lever 20.
The set pin 30c is fixed to a portion located below the side. Further, a reset hole 18c is formed in a portion of the bottom surface of the casing body 18 facing the lower surface 30b of the reset fitting 30.

An elongated hole 27b is formed in the middle of the operating lever 27 in the longitudinal direction of the operating lever 27.
An operation rod 33 is connected to 7b. That is, the operation rod 33 has a support pin 33b penetrating through the elongated hole 27b extending in the width direction and fixed to one end 33a, and is installed so as to be rotatable around the support pin 33b as a fulcrum. Also,
The operation rod 33 is formed by bending the intermediate portion 33c in the width direction so that the intermediate portion 33c can be locked to the operation lever 27, and the other end 33d is
It is arranged to slightly protrude from an operation hole 18d formed on the bottom surface of the casing body 18. That is, the operation stick 3
When the other end 33d of the third member 33 is moved to the solenoid 28 side, the operating rod 33 rotates around the support pin 33b, and the intermediate portion 33c abuts on the operating lever 27 to move the operating lever 27 to the solenoid 28 side. It is set to be moved in the push-back direction and to release the lock of the unlocking lever 26.

The detecting means 17 is provided on the rear end side of the solenoid 28, and as shown in FIGS. 1, 3 and 7,
A plate-like switch cam 34 attached with its front end protruding to the storage position S so that one side edge portion can contact the upper end corner of the fire door 1 when the fire door 1 is stored; A switch spring 35 that rotatably supports the switch cam 34 in a direction along the movement direction of the fire door 1 around the base end side of the edge as a rotation center and biases the switch cam 34 in the rotation direction;
And an operation display micro switch 36 for detecting whether the switch cam 34 is rotated.

The switch cam 34 is arranged so as to protrude from a slit hole 18e formed in the bottom surface of the casing body 18 so as to extend in the width direction, and is shown in FIGS. 7 (a) and 8 (a). As shown in (1), it has a substantially semicircular tapered shape in which the width becomes narrower in the protruding direction, and a curved concave portion 34a is formed in a side edge portion which first comes into contact with the fire door 1. The curved concave portion 34a is formed so as to contact the upper end corner of the rotating fire door 1. The switch spring 35 has a lower end externally inserted in a compressed state in a protruding portion 34b formed by projecting upward at the upper center of the switch cam 34, and biases the switch cam 34 downward and rotatably to hold it. are doing.

A flange 34c is formed on the upper portion of the switch cam 34 and protrudes from both the front and back surfaces and extends in the width direction. At the center of the flange 34c, a triangular protrusion 34d protruding downward is formed. Is formed. As shown in FIG. 7B, one end 37a of an actuator (leaf spring) 37 contacts the lower end of the projection 34d, and the fire door 1 is not held as shown in FIG. In a state where the switch cam 34 is not rotated (a state where the switch cam 34 is completely protruded), the one end 3
7a is sandwiched between the protrusion 34c and the bottom surface of the casing body 18.

The actuator 37 is a leaf spring formed in a substantially U-shape, and has an intermediate portion 37b provided at the upper portion of the operation display microswitch 36 disposed adjacent to the switch cam 34 and the switch spring 35. It is arranged on the knob 36a, and the other end 37c is fixed to the back of the operation display micro switch 36. When the switch cam 34 is not rotating, the actuator 37 presses the switch knob 36a of the operation display micro switch 36, as shown in FIG. Is turned on.

Conversely, as shown in FIG. 7 (b), when the fire door 1 is held and the switch cam 34 is rotated, the actuator 37 held by the projection 34d is pressed. Is moved upward, and is restored by the reaction force of the leaf spring of the actuator 37,
The intermediate portion 37b releases the switch knob 36a from being pressed, and turns off the operation display micro switch 36.

Therefore, as shown in FIG.
Is not held by the door holding mechanism 12, the switch cam 34 is completely protruded, the operation display micro switch 36 is turned on as described above, and the fire door 1 is stored in the storage position S. When this is attempted, as shown in FIG. 7, the switch cam 34 with the fire door 1 protruding is rotated, and the operation display micro switch 36 is turned on as described above.
To the off state.

The receiving seat 11 is a member on a substantially flat plate. As shown in FIGS. 5 and 9, the receiving seat 11 is separated from each other in the moving direction of the fire door 1 and the rollers 14 can be fitted therebetween. It has a first flange portion 40 and a second flange portion 41 that form the concave portion 11a. The receiving seat 11 is installed in a fitting state in an installation groove 1 a formed by cutting out a side surface opposite to the recess 11 a on the upper end surface of the fire door 1 with the recess 11 a as an upper surface.

That is, the L-shaped plate 42 is fixed in the installation groove 1 a by the bolt 43, and the receiving seat 11 is fixed on the L-shaped plate 42 by the bolt 44. The seat 11 is
The bolts 44 are fixed to the pair of long holes 11b formed to be screwed to the L-shaped plate 42 by penetrating them. Each of the long holes 11b is formed to be long along the width direction of the upper surface of the fire door 1, and the L-shaped plate 4 is formed through these long holes 11b.
With the bolt 44 fixed to 2, the seat 11 can be moved in the width direction of the upper surface of the fire door 1, and the seat 11 can be positioned and fixed at a desired position.

The first flange portion 40 is provided with the receiving seat 11
A slope portion 40a formed from the outer lower portion to the inner upper surface of the receiving seat 11 is formed on the wall 3 side of the receiving seat 11, that is, between the end face of the receiving seat 11 and the concave portion 11a, and on the wall 3 side of the first flange portion 40. Are formed. The second flange portion 41
The upper surface is formed between the end surface of the receiving seat 11 on the closing direction side and the concave portion 11 a, and the upper surface is set higher than the upper end of the first flange portion 40. That is, the movement of the concave portion 11a fitted to the roller 14 toward the wall 3 is restricted by the first flange portion 40.

The second flange portion 41 is provided with a movable member 45 having an inclined surface 45a which is inclined so that the roller 14 can contact the first flange portion 40 and forms a part of the concave portion 11a. The movable member 45 is connected to the first flange 40
It is attached so that it can move forward and backward. That is, the movable member 45 is formed with a through hole 45b having an axis in the advance / retreat direction, and the first flange portion 40 is provided with a female screw hole 40 having the same axis as the through hole 45b.
In the female screw hole 40b, a male screw member 46 is screwed into the through hole 45b while the head 46a is locked to the movable member 45.

Also, the movable member 4 is attached to the male screw member 46.
A compression spring 47 for urging the movable member 45 is externally inserted between the first flange 5 and the first flange portion 40. The compression spring 47 is attached to prevent the movable member 45 from loosening.

Therefore, the movable member 45 can be moved forward and backward by rotating the male screw member 46 with a driver or the like. When the movable member 45 is arranged at a position where the movable member 45 is advanced, the roller 14 fitted in the concave portion 11a comes into contact with the inclined surface 45a at a shallow position and is locked, and the roller 14 fits shallowly. Can be set weaker. Conversely, when the movable member 45 is retracted, the roller 14 comes into contact with the inclined surface 45a at a deep position and is locked, and the roller 14 fits deeply.
Can be set stronger.

A groove 46b into which the tip of a flathead screwdriver can be fitted is formed on the tip end surface of the male screw member 46. That is, the male screw member 46 can be rotated by inserting a flathead screwdriver into the groove portion 46b, and the movable member 45 can also be adjusted from the side opposite to the head portion 46a side of the male screw member 46 (that is, the holding of the fire door 1). Force adjustment).

Next, a method for holding a fire door using the door lock device of the present embodiment will be described with reference to FIGS. 3 and 4 by dividing into [electric operation], [manual operation], and [recovery operation]. I do.

[Electrical operation] When the solenoid 28 is energized by an operation signal of a sensor or the like that detects a fire or the like, the plunger 28a is sucked into the solenoid 28 as shown in FIG. 3 and FIG. The connected operating lever 27 is pulled. At this time, the lock between the unlocking pin 26a of the unlocking lever 26 and the operating lever 27 is released, and the unlocking lever 26 that has been released is moved rightward in FIG. Perform rotation.

When the unlocking lever 26 rotates, the protrusion 26
b is hit against the flat portion 22b of the lock fitting 22, and the impact unlocks the lock fitting 22 and the lock pin 20c, releasing the lock of the lock lever 20.
The released lock lever 20 is pushed down on the lock pin 20c side via the fulcrum A by the urging force of the operation spring 21, and the roller holder 23 at the other end 20b is drawn into the casing main body 18, and the roller 14 and the receiving seat 11
Is released, the fire door 1 turns out of the storage position S, and the passage or the like is closed.

When the unlock lever 26 is rotated, the switch flat portion 26c of the unlock lever 26 pushes the switch knob 32b via the switch lever 32a of the unlock detection micro switch 32, and the unlock detection micro switch is turned on. 3
2 is turned on, the power supply circuit of the solenoid 28 is shut off, and the hold release confirmation circuit is closed to send a release signal to the outside.

Further, the switch cam 34 held in the rotating state by the fire door 1 is released from the holding with the rotation of the fire door 1, and is pushed down by the urging force of the switch spring 35 to be completely protruded. And the one end 37a of the actuator 37 is
The switch is pressed down by c, and the switch knob 36a of the operation display micro switch 36 is pressed down by the intermediate portion 37b to be turned on.

[Manual operation] In the standby state, the fire door 1
When the roller 14 is pulled in the rotation direction by a force greater than the holding force, the roller 14 is pushed up by the first flange portion 40 of the receiving seat 11 against the operation spring 21 and the lock lever 2
0 rotates around the lock pin 20c as a fulcrum. Furthermore, the roller 14 gets over the first flange portion 40 and is unlocked, and the fire door 1 can be rotated to close a passage or the like.

[Restoration Operation] In the restoration operation after the electric operation, after restoring the operation signal, the tip of the reset rod (driver or the like) is applied to the lower surface portion 30b of the reset fitting 30 from the reset hole 18c to push up the reset fitting 30. . At this time, the reset fitting 30 is connected to the front pin 29 of the fulcrum shaft.
4 is rotated rightward with the fulcrum a as a fulcrum, the set pin 30c pushes the vicinity of one end 20a of the lock lever 20, and the lock pin 20c is pushed up via the fulcrum A of the lock lever 20. At this time, the unlocking lever 26 is operated by the unlocking pin 26a.
Is rotated against the unlocking spring 25 in a reset direction (left rotation in FIG. 4).

When the unlocking lever 26 rotates counterclockwise, the lock spring 22 rotates counterclockwise by the return spring 31, and the lock pin 20c of the lock lever 20 is locked and supported to bring it into the locked state. When the lock pin 20c is pushed up and locked, the roller holder 23 and the roller 14 at the other end 20b of the lock lever 20 protrude from the casing main body 18 to be in a recovery preparation state.

When the lock member 22 rotates counterclockwise and the unlocking pin 26a is pushed up by the reset metal member 30, the operating lever 27 having one end locked to the unlocking pin 26a is opened. Then, the unlocked operating lever 27 is advanced by the reset spring 28b, and again locks the unlocking pin 26a of the unlocking lever 26 at an upper portion of one end, thereby returning to the original state before the operation.

Next, when the fire prevention door 1 is placed in the door pocket (storage position S), the roller 14 is pushed up by the inclined portion 40a of the receiving seat 11, and rides over the first flange portion 40 of the receiving seat 11, thereby receiving the receiving seat. The roller 14 enters the recess 11a of the eleventh portion. That is, in this state, the fire door 1 is in the storage position S
Is held open. Note that the restoration after the manual operation is in a state where the roller 14 is projected from the casing body 18, so that the fire prevention door 1 can be held open only by putting the fire door 1 in the storage position S.

In the prior art, the lock lever was directly pushed up by the reset rod. In this case, the reset rod was likely to be displaced, possibly damaging other components. Since the tip of the reset rod is pressed against the portion 30b, the work is hardly displaced and good workability is obtained.

In the door lock device of this embodiment, the operation of the solenoid 28 is for opening the unlocking lever 26, and the force used to actually release the locking of the lock lever 20 by the lock fitting 22. Is the urging force of the unlocking spring 25 that strikes the unlocking lever 26 against the lock fitting 22. Therefore, the operation of the solenoid 28 is merely a trigger for releasing the bias of the roller 14,
Even if the force of the solenoid 28 itself is weak, if the locking of the unlocking lever 26 can be released, the locking of the lock lever 20 can be reliably released by the strong urging force of the unlocking spring 25.

The unlock detection micro switch 32
However, since the unlocking lever 26 is installed at a position where it comes into contact with the unlocking lever 26 when the unlocking lever 26 is hit against the lock fitting 22 and the lock fitting 22 moves, the locking of the lock lever 20 by the lock fitting 22 is released. At the same time, the unlocking lever 26 comes into contact with the unlocking detection microswitch 32 to turn on the switch, so that the operation of the solenoid 28 can be automatically released.

Further, there is provided an operating rod 33 having one end connected to the operating lever 27 and moving the other end so as to move the operating lever 27 in a direction to release the lock of the unlocking lever 26. Therefore, the lock of the lock lever 20 can be manually released without operating the solenoid 28 by simply moving the other end of the operation rod 33, and the lock can be unlocked.

In the door lock device of the present embodiment, one side is installed on a fire door provided rotatably, but may be installed on another type of door. For example, you may install in a sliding door etc.

[0059]

According to the door lock device of the present invention, the following effects can be obtained. (1) According to the door lock device of the first aspect, the unlocking means includes: an unlocking lever locked in a state of being urged by an unlocking spring toward the locking member; An operating lever to be locked, and an operating lever connected to the operating lever, the operating lever being moved at the time of operation to release the unlocking lever, and hitting the locking member to move the locking member to release the locking of the lock lever. When the solenoid is operated, the unlocking lever is hit against the locking member by the urging force of the unlocking spring, and the locking member that locked the lock lever is impacted. As a result, the pressing of the lock lever against the roller can be released. Therefore, even if the force of the solenoid itself is weak, if the locking of the unlocking lever can be released, the locking of the lock lever can be reliably released with high operating stability by the strong urging force of the unlocking spring. Further, the strength of the unlocking lever hitting the locking member can be easily adjusted only by changing the urging force by changing the unlocking spring.

(2) According to the door lock device of the second aspect, the unlock detection switch is set at a position where the unlock lever is hit against the unlocking lever when the unlocking lever is hit against the locking member and the locking member moves. Since it is installed, the unlocking lever comes into contact with the unlocking detection switch simultaneously with the unlocking of the lock lever, and the operation of the solenoid can be automatically released. Therefore, there is no need to separately install components for operating the unlock detection switch, and the number of components can be reduced.

(3) According to the door lock device of the third aspect, the unlocking means releases the locking of the unlocking lever by unlocking the operating lever by moving the other end of the unlocking lever by connecting the one end to the operating lever. Since the operating rod is set to move in the direction in which the operating lever moves, the lock lever can be manually unlocked and unlocked simply by moving the other end of the operating rod. In other words, in the case of adjustment work,
Many times it may be necessary to activate the device,
In the past, the solenoid had to be energized and actuated each time, which was very troublesome.In contrast, in the present invention, the solenoid can be manually actuated simply by operating the operating rod, greatly improving workability. Can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a door holding mechanism before a solenoid is operated in an embodiment of a door lock device according to the present invention.

FIG. 2 is an internal plan view showing a door holding mechanism before a solenoid is operated in one embodiment of the door lock device according to the present invention.

FIG. 3 is a longitudinal sectional view showing a door holding mechanism when a solenoid is operated in one embodiment of the door lock device according to the present invention.

FIG. 4 is a side view showing a main part of a door holding mechanism before and when a solenoid is operated in an embodiment of the door lock device according to the present invention.

FIG. 5 is a longitudinal sectional view showing a mounting structure of a receiving seat in one embodiment of the door lock device according to the present invention.

FIGS. 6A and 6B are a plan view and a front view showing an appearance of a door lock device according to an embodiment of the present invention.

FIG. 7 is a side view schematically showing a detecting means when a fire door is held in a door lock device according to an embodiment of the present invention, and a partially cutaway front view.

FIG. 8 is a side view schematically showing a detecting means when a fire door is not held in a door lock device according to an embodiment of the present invention, and a partially cutaway front view.

FIG. 9 is a plan view and a partially cutaway side view showing a receiving seat in the door lock device according to the embodiment of the present invention.

FIG. 10 is a sectional view showing a conventional example of a door lock device according to the present invention.

FIG. 11 is a longitudinal sectional view showing a state before a solenoid operates in a conventional example of a door lock device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Fire prevention door 11 Receiving seat 12 Door holding mechanism 14 Roller 15 Energizing means 16 Unlocking means 20 Lock lever 21 Operation spring 22 Locking member (locking member) 25 Unlocking spring 26 Unlocking lever 28 Solenoid 32 Unlocking detection micro Switch (Unlock detection switch) 33 Operation stick S Storage position

Claims (3)

[Claims] 1. A receiving seat provided on a door supported to be openable and closable, and a door holding mechanism provided at a storage position of the door and fitted to the receiving seat when the door is stored to hold the door at the storage position. A door lock device comprising: a roller capable of rolling in a direction along a moving direction of the door and capable of being fitted to the receiving seat; and a roller fitted to the receiving seat. And an unlocking means for releasing the biasing of the roller by the biasing means, wherein the biasing means has one end locked. A lock lever urged by an operation spring so that an end thereof presses the roller in the protruding direction, and releases the pressing by the other end in a state where one end is opened; and A locking member for locking one end, wherein the unlocking means is An unlocking lever locked in a state biased by an unlocking spring toward the member, an operating lever for locking the unlocking lever, the operating lever being connected to the operating lever and moving the operating lever during operation, A door lock device comprising: a solenoid that is configured to release an unlocking lever and strike the locking member to move the locking member to release the locking of the lock lever. 2. The door lock device according to claim 1, further comprising an unlock detection switch that detects that the lock lever is unlocked and sends a signal to release the operation of the solenoid. A door lock device, wherein the detection switch is provided at a position where the detection lever contacts the unlocking lever when the locking lever is hit against the locking member and the locking member moves. 3. The door locking device according to claim 1, wherein the unlocking means is connected to the unlocking lever by moving one end of the door to the operating lever and moving the other end of the unlocking lever. A door lock device comprising an operation rod set to be moved in a direction to release a stop.