JP3722778B2 - Door lock with internal emergency unlocking mechanism - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a locking device used for a door of a walk-in type large casing, and more specifically, an operator or the like enters the casing to perform work such as inspection and repair of electrical equipment. When the other person accidentally closes and locks the door from the outside, it is equipped with an inside emergency unlocking mechanism that allows the trapped person to unlock from the inside and escape from the housing by himself The present invention relates to a door locking device.
[0002]
[Prior art]
Such a door lock device with an inner emergency unlocking mechanism is used for large commercial refrigerators and refrigerators, as disclosed in Japanese Utility Model Publication No. 2-35858, Japanese Utility Model Publication No. 2-40211, or Japanese Utility Model Publication No. 5-27646. Although there are those disclosed in the publication, these conventional inner emergency unlocking mechanisms use a lock plate that rotates with the rotation of the rotor and engages and disengages with the first receiving part on the housing side, It is intended for a one-position locking door locking device that locks the door to the housing at one place on the left and right sides.
[0003]
The present applicant has previously proposed an internal unlocking device having a door structure according to Japanese Patent Application No. 2002-49545, which is also used for a locking device of a one-position locking system, in addition to the locking plate. , Using one or two locking rods that move forward and backward with the rotation of the rotor and the lock bolt at the tip engages and disengages from the second receiving part on the housing side, and the door is one of the upper side and the lower side. Alternatively, it cannot be applied to a two-position locking type or three-position locking type door locking device that locks both sides.
[0004]
[Problems to be solved by the invention]
In view of the narrow scope of application of the conventional inner emergency unlocking mechanism, even in a two-position locking system or a three-position locking system, the locked person can unlock it quickly and easily by simple operation. The door locking device having an inner emergency unlocking mechanism that can be escaped is provided.
[0005]
[Means for Solving the Problems]
Hereinafter, the door locking device with an inner emergency unlocking mechanism according to claim 1 will rotate with the rotation of the rotor 1 and will be described with reference numerals in the attached drawings. The lock plate 4 that engages and disengages with the portion 3 and the one or two with which the lock bolt 5 at the front end portion engages and disengages with the second receiving portion 6 on the housing 2 side as the rotor 1 rotates. In the door locking device 8 that is interlocked with the rotor 1,
The lock plate 4 is pivotally attached to one end of a base member 9 fixed to the inner end of the rotor 1 by a first pivot 10, and an operation lever 11 is pivoted by a second pivot 12 to the other end of the base member 9. The one end of the slide member 13 that is attached and slidably guided to the base member 9 is abutted against the base end 4 a of the lock plate 4, and the lock plate 4 is fixed to an overhanging position that can be engaged with the first receiving portion 3. Hold
The operating lever 11 is connected to the other end of the slide member 13 by a first slot 14 and an operating pin 15 passing through the first slot 14, and a cam link 16 is pivotally attached to the base member 9 by a third pivot 17. The base end portion of the locking rod 7 is pivotally attached to the cam link 16 by a fourth pivot 18, and the cam link 16 is slid by the second pivot 19 and the fifth pivot 20 passing through the second slot 19. The operation lever 11 or the slide member 13 is urged by the position holding spring member 21 in a direction to be connected to the member 13 and the slide member 13 fixes and holds the lock plate 4 at the protruding position. The slide member 13 is pulled away from the lock plate 4 to be able to rotate around the first pivot 10 and the cam The lock bolt 5 the locking rod 7 via the link 16 is driven in the direction away from said second receiving portion 6.
[0006]
In the door locking device according to the second aspect of the invention, in addition to the configuration of the first aspect of the invention, the lock plate 4 is detached from the first receiving portion 3 between the lock plate 4 and the base member 9. A posture-holding spring member 23 is provided to urge the rotation to the retracted position.
[0007]
In the door locking device according to a third aspect of the invention, in addition to the structure of the first or second aspect of the invention, a rising plate portion 24 is provided at the other end of the slide member 13, and the rising plate portion 24 is provided with the rising plate portion 24. The first slot 14 is formed in an arc shape, and the operating pin 15 is fixed to the operation lever 11.
[0008]
In the door lock device of the invention of claim 4, in addition to the structure of the invention of claims 1 to 3, the position holding spring member 21 is constituted by a torsion spring, and the coil portion 21a of the torsion spring is provided. It is fitted to the second pivot 12, one linear end 21 b of the torsion spring is brought into contact with a spring receiving pin 25 fixed to the operation lever 11, and the other linear end 21 c of the torsion spring is connected to the other end of the base member 9. It is made to contact | abut to the inner bottom face 9a of a part.
[0009]
In the door locking device according to the fifth aspect of the present invention, in addition to the structure of the first to fourth aspects of the invention, when the lock plate 4 is rotated to the retracted position, the base end portion 4a of the lock plate 4 is A stop projection 26 that abuts is provided on the base member 9.
[0010]
In the door locking device according to the sixth aspect of the invention, in addition to the structure of the first to fifth aspects of the invention, when the lock plate 4 is in the extended position, an end surface 9b of one end portion of the base member 9 is provided. A restricting projection 27 is formed on the base end of the lock plate 4.
[0011]
In the door lock device according to a seventh aspect of the invention, in addition to the structure of the first to sixth aspects of the invention, two locking rods 7 are provided on the top and bottom of the base member 9, and the operation lever When the lock rods 7 and 7 are pulled toward the pedestal member 9 by pushing in, and the lock bolts 5 and 5 are detached from the second receiving portions 6 and 6, the two cam links 16 and 16 The cam link 16 is formed so as to be substantially in contact with the side edge surface 16a.
[0012]
[Effects of the Invention]
In order to lock the door 22 with respect to the housing 2 by the door locking device of the present invention after completing the required work such as inspection and repair for the electrical equipment installed inside the housing 2, After the door 22 is closed, the rotor 1 of the door lock device 8 is rotated in a predetermined direction from the outside of the door 22 by appropriate operation means. Since the pedestal member 9 fixed to the rotor 1 is integrally rotated by the rotation of the rotor 1, the lock plate attached to the pedestal member 9 is a housing as shown in FIGS. 2, 3, and 4. Engage with the first receiving part 3 on the second side. Further, since the locking rod 7 is driven in the forward direction by the rotation of the base member 9, the lock bolt 5 is engaged with the second receiving portion 6 on the housing 2 side. As a result, the door 22 is locked to the housing at two or three locations.
[0013]
In order to unlock the door 22, the rotor 1 is rotated from the outside of the door 22 in the opposite direction to the above via the operation means. As the rotor 1 rotates, the pedestal member 9 rotates integrally, so that the lock plate 4 is detached from the first receiving portion 3 on the housing 2 side as shown in FIG. Further, since the locking rod 7 is driven in the backward direction by the rotation of the base member 9, the lock bolt 5 is detached from the second receiving portion 6 on the housing 2 side. As a result, the door 22 is unlocked at two or three places, and the door 22 becomes openable.
In the above-described normal locking operation and unlocking operation, the operation lever 11 of the inner emergency unlocking mechanism is not pushed in, so the slide member 13 is held at the initial position.
[0014]
When another person closes the door 22 without noticing that the worker or the like remains inside the housing 2 and locks the door 22, the trapped worker or the like holds the position holding spring. The operation lever 11 may be pushed in against the bias of the member 21.
In FIG. 2, when the operating lever 11 is pushed and rotated in the direction of the arrow A around the second pivot 12, the operating pin 15 moves in the first slot 14 to move the first slot 14 closer to the second pivot 12. In order to push the inner wall surface, the slide member 13 is guided by the base member 9 and the cam link 16 and pulled and slid in the direction of arrow B in FIGS.
[0015]
The pulling slide of the slide member 13 causes the distal end surface of the slide member 13 to move away from the base end portion 4a of the lock plate 4, so that the lock plate 4 stands up in the direction of arrow C in FIG. Rotate. By this rotation, as shown in FIG. 5, the distal end portion of the lock plate 4 is detached from the first receiving portion 3, so that the lock on the side portion of the door 22 is released.
The lock plate 4 is held at a retracted position in which the lock plate 4 is erected by the urging force of the spring member 23, and does not hit the opening edge of the first receiving portion 3 or the housing 2 in the opening process of the door 22.
[0016]
Further, as the slide member 13 is pulled and slid, the fifth pivot 20 moves in the second slot 19 and pushes the inner wall surface of the second slot 19 near the operating lever 11. Is pulled and rotated around the third pivot 17 in the direction of arrow D in FIG. As the cam link 16 pulls and rotates, the lock rod 7 is pulled in the direction of arrow E in FIG. 3 by the fourth pivot 18, so that the link rod mechanism 7 is pivotally attached to the tip of the lock rod 7. As shown in FIG. 6, the connected lock bolt 5 is detached from the second receiving portion 6 on the housing 2 side at the final stage where the two cam links 16, 16 are substantially in contact with each other at the side edge surface. As a result, the locks at the upper and lower sides of the door 22 are also released.
[0017]
The doors 22 unlocked at a total of three positions with respect to the housing 2 are immediately opened when a confined worker or the like pushes the inner surface of the door forward.
After escaping from the housing 2, the operation lever 11 is rotated back to the initial position in FIG. 2 around the second pivot 12. By the return rotation of the operation lever 11, the operating pin 15 moves in the first slot 14 and pushes the inner wall surface of the first slot 14 near the first pivot 10, so that the slide member 13 is connected to the base member 9 and the cam. It is guided by the link 16 and pushed and slid toward the lock plate 4 side.
[0018]
Thereafter, when the lock plate 4 is rotated around the first pivot 10 against the bias of the posture holding spring member 23 and rotated to the position protruding to the side of the base member 9, After being pushed by the base end portion 4a, the slide member 13 once moves slightly back toward the operation lever 11, and then moves forward again. As a result, the distal end of the slide member 13 pushes against the base end portion 4 a of the lock plate 4, so that the lock plate 4 is fixedly held at the protruding position.
Contrary to the above, the lock plate 4 can be first rotated and placed in the overhanging position, and then the slide member 13 can be slid forward by the operation lever 11.
[0019]
When the posture maintaining spring member 23 is not provided between the lock plate 4 and the pedestal member 9, the lock plate 4 is retracted only by pulling and sliding the slide member 13 toward the second pivot 12 with the operation lever 11. There is no automatic rotation to position.
When the spring member 23 is not provided, when the trapped operator or the like presses the inner surface of the door forward after the operation lever 11 is pushed, the distal end portion of the lock plate 4 is on the housing 2 side. When the first receiving portion 3 is pushed by the reaction, the lock plate 4 passes through the position of the first receiving portion 3 while rotating around the first pivot 10.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
In the illustrated embodiment, the door locking device 8 is constituted by a drawer rotation operation type lock handle device. In this lock handle device, the rotor 1 is housed in a bearing cylinder portion 8c of a vertically long main body case 8b so as not to be movable in the front-rear direction, and the base end portion of the vertically long operating handle 8a is connected to the front end portion of the rotor 1 at the sixth pivot. It is pivotally attached by 32. The sixth pivot 32 is arranged in parallel with the front surface of the door 22. After the operation handle 8 a is pulled out from the main body case 8 b around the sixth pivot 32, the operation handle 8 a is turned around the bearing tube portion 8 c. The rotor 1 is integrally rotated. The operation handle 8a is locked to the main body case 8a by a cylinder lock or a dial code lock incorporated as necessary.
The shape structure of the door lock device 8 is not limited to that shown in the drawings, and a known one can be appropriately selected and used.
[0021]
A known interlocking mechanism including a pivot pin and a connecting rod is inserted between the locking rod 7 and the lock bolt 5 to move the locking rod 7 up and down (not only linearly but also rotating or swinging). In some cases, the lock bolt 5 is engaged with and disengaged from the second receiving portion 6 on the housing 2 side. The lock bolt 5 is not limited to the dead bolt type, and a latch bolt type can also be used.
The first receiving part 3 and the second receiving part 6 on the side of the case 2 are formed in a slot shape or a bent piece shape as a part of the case, or manufactured as a separate member from the case 2. 2 can be fixed. Between the housing 2 and the door 22, a cushioning 30 or a waterproof / dustproof packing 30 is mounted.
[0022]
A square hole 33 formed in the main plate portion of the pedestal member 9 having a thin U-shaped cross section is fitted into the square rod-shaped inner end of the rotor 1 so as not to be relatively rotatable. Thus, the base member 9 is fixed to the rotor 1. A work hole 35 for inserting and turning the bolt 34 is formed in the main plate portion of the slide member 13 having a thin U-shaped cross section.
The rotor 1 of the door locking device 8 is disposed at a right angle in the front-rear direction of the door 22, and the pedestal member 9 fixed orthogonally to the rotor 1 is disposed in parallel with the inner surface of the door 22. The first pivot 10, the second pivot 12, the operating pin 15, and the spring receiving pin 25 are arranged in parallel with the inner surface of the door 22, and their central axes extend in the vertical direction.
[0023]
The third pivot 17, the fourth pivot 18, and the fifth pivot 20 are disposed at right angles to the inner surface of the door 22, and their central axes extend in the front-rear direction. A spherical operation pad 28 to which a palm of an operator or the like is pressed is fixed to the back side of the distal end portion of the operation lever 11 with a bolt 29. A rubber cushion 31 is mounted at the center of the main plate at the other end of the base member 9 so as not to damage the inner surface of the door 22.
Similar to the position holding spring member 21 of the slide member 13, the posture holding spring member 23 of the lock plate 4 is constituted by a torsion spring having a coil portion.
[0024]
【The invention's effect】
In the door locking device according to the first aspect of the present invention, a lock plate is pivotally attached to one end of the pedestal member fixed to the rotor, and an operation lever is pivotally attached to the other end of the pedestal member. One end of the slide member is abutted against the base end of the lock plate, an operation lever is connected to the other end of the slide member by an operating pin, and a locking rod is pivotally attached to the cam link plate pivotally attached to the base member Then, the cam link is connected to the slide member, and the slide member is urged by the position holding spring member in a direction to fix and hold the lock plate in the extended position engageable with the first receiving portion. By pushing toward the inner surface of the door, the slide member is pulled away from the lock plate, and the lock plate is erected and rotated to the retracted position separated from the first receiving portion. By pulling the locking rod and detaching the lock bolt from the second receiving part, even in the two-position locking method or the three-position locking method, an operator or the like is easy in an emergency confined inside the door. By the operation, it is possible to quickly escape by surely unlocking from the inside by itself.
[0025]
In the door locking device according to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, a spring member for maintaining the posture is provided between the lock plate and the pedestal member. When the slide member is pulled to the operation lever side by the operation, the lock plate automatically detaches from the first receiving portion and immediately stands up and rotates to the retracted position, and the operation is highly sensitive.
[0026]
In the door locking device according to a third aspect of the invention, in addition to the effect of the first or second aspect of the invention, a rising plate portion is provided at the other end portion of the slide member, and the first rising plate portion is provided with the first locking plate portion. Since the groove hole is formed in an arc shape and the operating pin that moves in the first groove hole is fixed to the operation lever, the pulling operation and the push-back operation of the slide member by pushing the operation lever are performed smoothly and lightly.
[0027]
In the door locking device according to a fourth aspect of the present invention, in addition to the effects of the first to third aspects of the invention, the position holding spring member is constituted by a torsion spring, and the coil portion of the torsion spring is the first member. It is fitted to the two pivots, one straight end of the torsion spring is brought into contact with a spring receiving pin fixed to the operating lever, and the other straight end of the torsion spring is brought into contact with the other end of the pedestal member. The means for urging the slide member in the direction of fixing and holding the plate in the overhanging position and the urging means for pushing the operating lever and holding the posture in the standby position can serve as a single spring member. Simplified.
[0028]
In the door lock device according to the fifth aspect of the invention, in addition to the effects of the first to fourth aspects of the invention, when the lock plate rotates to the retracted position, the base end portion of the lock plate abuts. Since the protrusion is provided on the pedestal member, the lock plate is stopped and held accurately and reliably at the retracted position together with the action of the posture holding spring member, and the first receiving portion and the housing are opened when the door is opened. It does not collide with the opening edge of the body, and the lock plate, the first receiving part or the opening edge of the housing is not distorted and the painted surface and the plating surface are not damaged.
[0029]
In the door locking device according to a sixth aspect of the invention, in addition to the effects of the first to fifth aspects of the invention, when the lock plate is in the overhanging position, it abuts against an end surface of one end portion of the base member. Since the restricting projection is formed at the base end portion of the lock plate, the lock plate is fixed and held accurately and reliably at the protruding position, and the engagement and disengagement with the first receiving portion is performed accurately and smoothly.
[0030]
In the door locking device according to a seventh aspect of the invention, in addition to the effects of the first to sixth aspects of the invention, the lock rod is pulled toward the base member by pushing the operating lever, and the lock bolt is When the two cam links come into contact with each other at the side edge surface when they are separated from the second receiving portion, even if a person trapped inside is embarrassed and pushes the operating lever with excessive force, the stress is Eventually, it will be distributed and supported by the two cam links, and the components of the door locking device will be protected from distortion and improved durability.
[Brief description of the drawings]
FIG. 1 is a front view of an inner emergency unlocking mechanism according to an embodiment of the present invention.
2 is a bottom view of the door locking device including the inner emergency unlocking mechanism of FIG. 1 when locked. FIG.
3 is a rear view of the door locking device including the inner emergency unlocking mechanism of FIG. 1 when locked. FIG.
4 is a cross-sectional view taken along line FF in FIG.
FIG. 5 is a bottom view of the door locking device provided with the inner emergency unlocking mechanism of FIG. 1 at the time of emergency unlocking.
6 is a rear view of the door locking device including the inner emergency unlocking mechanism of FIG. 1 at the time of emergency unlocking.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotor 2 Housing | casing 3 1st receiving part 4 Lock plate 5 Lock bolt 6 2nd receiving part 7 Locking rod 8 Locking device 9 Door member 10 1st axis 11 Operation lever 12 2nd axis 13 Slide member 14 1st Slot 15 Actuation pin 16 Cam link 17 Third pivot 18 Fourth pivot 19 Second slot 20 Fifth pivot 21 Position retaining spring member 22 Door 23 Posture retaining spring member 24 Rising plate 25 Spring receiving pin 26 Stop projection 27 Restriction protrusion

Claims (7)

A lock plate that rotates with the rotation of the rotor and engages and disengages with the first receiving portion on the housing side, and a forward and backward movement with the rotation of the rotor, so that the lock bolt at the tip portion receives the second receiving portion on the housing side. In the door locking device equipped with one or two locking rods to be engaged with or disengaged from the part in conjunction with the rotor,
The lock plate is pivotally attached to one end of a pedestal member fixed to the inner end of the rotor by a first pivot, and an operation lever is pivotally attached to the other end of the pedestal by a second pivot, and is slid on the pedestal member. One end of the slide member that has been moved and guided is abutted against the base end of the lock plate, and the lock plate is fixedly held at an overhanging position that can be engaged with the first receiving portion, and the first groove is formed at the other end of the slide member. The operating lever is connected by an operating pin passing through the hole and the first slot, the cam link is pivotally attached to the base member by the third pivot, and the proximal end of the locking rod is pivoted by the fourth pivot to the cam link. The cam link is connected to the slide member by the fifth pivot passing through the second slot and the second slot, and the operation lever or the slide member is moved in the direction in which the slide member fixes and holds the lock plate at the extended position. The cam member is biased by a spring member for holding and pushing the operation lever toward the inner surface of the door, thereby pulling the slide member away from the lock plate so that the lock plate can be rotated about the first pivot axis, and the cam link. A door locking device with an inner emergency unlocking mechanism, wherein the locking rod is driven in a direction in which the lock bolt is detached from the second receiving portion through the door. 2. The door for holding a door according to claim 1, wherein a spring member for maintaining a posture is provided between the lock plate and the pedestal member to rotate and urge the lock plate to a retracted position separated from the first receiving portion. Locking device. 2. A rising plate portion is provided at the other end portion of the slide member, the first groove hole is formed in an arc shape in the rising plate portion, and an operating pin is fixed to the operation lever. The door lock device according to 2. The position holding spring member is constituted by a torsion spring, the coil portion of the torsion spring is fitted to the second pivot, and one linear end of the torsion spring is brought into contact with a spring receiving pin fixed to the operation lever, 4. The door locking device according to claim 1, wherein the other linear end portion of the torsion spring is brought into contact with the inner bottom surface of the other end portion of the base member. The door lock according to any one of claims 1 to 4, wherein the base member is provided with a stop protrusion with which a base end portion of the lock plate abuts when the lock plate is rotated to the retracted position. apparatus. 6. The control projection according to claim 1, wherein when the lock plate is in the projecting position, a restriction projection that abuts on an end surface of one end of the base member is formed on the base end of the lock plate. The door lock device described in 1. When the lock rod is equipped with two above and below the pedestal member, the lock rod is pulled toward the pedestal member side by pushing the operation lever, and when the lock bolt is detached from the second receiving portion, The door lock device according to any one of claims 1 to 6, wherein the cam link is formed so that the two cam links substantially come into contact with each other at a side edge surface.

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