JP3756545B2 - Locking device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a lock device that is preferably used for a door that is pivotally supported at one end by a frame, and particularly suitable for a door of a structure installed outdoors such as a portable toilet that can be moved and installed. The present invention relates to a locking device used for the above.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a slide-type locking device having a simple structure is used for a door whose one end is pivotally supported by a frame body such as a toilet door. This slide type locking device is provided on the door, provided on the frame body side with a latch that is displaceable in a direction perpendicular to the swinging direction of the door on a horizontal plane, a handle for displacing the latch, and the latch It is provided with the fastener which inserts. When locking the door, the user manually operates the handle so that one end of the latch protrudes from the other end of the door and is fitted into the fastener.
[0003]
The sliding lock device having such a structure can be easily checked for locking as compared with a cylinder lock (rotary lock device) that displaces the clasp by rotating a knob or the like. It is also excellent in terms of operability.
[0004]
[Problems to be solved by the invention]
However, in the sliding lock device as described above, the door is swingable when the toilet is not in use and no one is inside the door. Therefore, when the sliding lock device is used as a door of a structure installed outdoors such as a simple toilet that can be moved and installed, the door easily swings due to wind or the like. Therefore, in order to prevent such swinging of the door, it is necessary to further provide parts other than the sliding lock device such as a door check and a spring-loaded hinge, and the structure and installation work become complicated. There is.
[0005]
On the other hand, when the door can be locked by allowing the latch to be displaced from the outer side of the door, even if there is no one on the inner side of the door as described above, Oscillation can be prevented. However, simply allowing the latch to be displaced from the outside of the door as described above requires a displacement operation of the latch even when the door is closed from the outside, and the operation is complicated.
[0006]
An object of the present invention is to provide a locking device that can hold a door in a closed state with good operability and without using a separate part.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a locking device for a door, one end of which is pivotally supported by a frame, and a housing attached to the door intersects with a swinging direction of the door. A latch member that is slidable in the direction in which the one end protrudes or retracts from the other end of the door, and a guide slope is formed at the one end, and is fixed to the latch member, A handle capable of slidingly displacing the latch member from the side and the outer side, and a spring member for resiliently biasing the latch member in a direction in which one end of the latch member protrudes from the other end of the door A holding member for holding the latch member in a projecting position, and an operation piece that is provided at the housing so as to be angularly displaceable facing the other end of the latch member and is angularly operated from the inner side of the door; The latch member in the projecting position in conjunction with the operation piece Angularly displaced between the locking position contacting the other end and the unlocking position where the latch member can be slidably displaced by retreating from the displacement region of the latch member. And a reversing spring that elastically biases the retaining piece so that the state is maintained when the retaining piece is in the locked position or the unlocked position. A holding member and a locking member provided on the frame body so as to face the latch member and having a recess for fitting one end of the latch member, the latch member when the door is closed The guide slope is retracted by slidingly contacting the peripheral edge of the recess of the locking member, and protrudes when the door is completely closed, and the one end is fitted into the recess and locked.
[0008]
Further, the locking member is provided on each of a portal-shaped receiving member that forms the recess and an external screw is formed on a leg portion, and an inner side and an outer side of the frame body. A pair of mounting plates formed with insertion holes through which the leg portions are inserted, an insertion hole formed in the mounting plate and a free hole formed in the frame body, and the mounting plate sandwiching the frame body A bolt and a nut, and a pair of nuts for holding and fixing a leg portion of the receiving member at an arbitrary position of an external screw formed on the leg portion are provided on the mounting plate.
[0009]
[Action]
According to the first aspect of the present invention, in a lock device used in a toilet door or the like whose one end is pivotally supported by the frame body, the latch member for locking the door to the frame body is provided with a door. The latch member is slidably provided in a direction crossing the swinging direction of the door, and the latch member is elastically biased in the protruding direction by a spring member, and can be held and locked at the protruding position. A holding member is provided.
[0010]
That is, the latch member is provided in a housing attached to the door so as to be slidable in a direction intersecting with the swinging direction of the door and having one end protruding or retracting from the other end of the door. . The latch member can be slidably displaced from the inner side of the door and the outer side of the door by a handle fixed to the latch member, and the spring member is elastically moved in a direction in which one end projects from the other end of the door. Is energized. A locking member is provided on the frame so as to face the latch member. When the door is closed, one end of the latch member is fitted into the recess of the locking member, and the door is rocked. It is locked so as not to be displaced.
[0011]
Therefore, the user can open the door by a simple operation that only slides and displaces the latch member in the backward direction from either the inner side or the outer side of the door.
[0012]
In addition, when the operating force in the backward direction of the user is released, the latch member protrudes from the other end of the door by the elastic force of the spring member, and thus the user closes the door. Thus, by releasing the operation force in the backward direction, one end of the latch member is fitted into the recess of the locking member, and the door is held in the closed state. Even if the user forgets to close the door, if the door is swung by wind or the like and is displaced in the closing direction, the guide slope formed at one end of the latch member is When the latch member is slidably contacted with the peripheral edge of the recess and the latch member is retracted and the door is completely closed, the latch member has one end thereof in the recess of the locking member due to the elastic force of the spring member. The door is inserted and held in a closed state.
[0013]
Therefore, even if the user forgets to close the door or does not close it completely, once the door is closed by wind or the like, one end of the latch member is inserted into the recess of the locking member, and the door is in the closed state. It is possible to prevent such a problem that the door is held open. Therefore, it is not necessary to provide separate parts such as the door check and spring hinge for holding the door in the closed state, and the configuration and the mounting work can be simplified.
[0014]
Furthermore, when the door is closed as described above, the latch member protrudes into the locking member, and in this state, the user operates the holding member to hold the latch member in the protruding position. The door can be locked. Therefore, the structure for locking can be provided integrally with the latch member that is slidably displaced, and the structure can be simplified.
[0015]
Further, an operation piece that is provided on the housing so as to be angularly displaceable so as to face the vicinity of the other end of the latch member, and an engagement piece that is provided coaxially, for example, coaxially and interlocked with the operation piece, And a reversing spring that holds the state of the locking piece. The operation piece can be angularly displaced from the inner side of the door, and when the user performs the angular displacement operation, for example, the locking piece realized by a rotating member having a different diameter, etc. Angular displacement occurs between the locking position contacting the other end and the unlocking position where the latch member can be slidably displaced by retracting from the displacement region of the latch member. The locking piece is elastically biased by a reversing spring so as to maintain the state when the locking piece is in the locked position or the unlocked position.
[0016]
Therefore, even if the user stops the operation in the middle of the angular displacement operation, the locking piece in the transition state is displaced to the locked position or the unlocked position by the elastic force of the reversing spring, and thus has a simple structure. Stable operation can be realized.
[0017]
Furthermore, the locking piece can be angularly displaced from the outside of the door with a predetermined tool such as a flat-blade screwdriver.
[0018]
Therefore, even if an emergency situation occurs in which a child accidentally operates the locking piece and becomes trapped on the inner side of the door, by using the predetermined tool, the outer side of the door Can be unlocked and safety can be improved.
[0019]
The locking member includes a portal-shaped receiving member, a pair of mounting plates, mounting bolts and nuts for fixing the mounting plates to the frame, and a pair of nuts. In the receiving member, an external screw is formed on the gate-shaped leg portion, and a connecting portion that connects both the leg portions is in sliding contact with the guide slope of the latch member. The receiving member is attached to the mounting plate so as to sandwich the mounting plate by a pair of nuts that are screwed onto external screws formed on the legs of the receiving member. The mounting plate is fixed to the frame by mounting bolts and nuts that pass through the mounting plate. At this time, the insertion hole for the mounting bolt formed in the frame is a free hole. Therefore, the mounting plate can be displaced within the range of the hole diameter of the free hole and attached at an arbitrary position.
[0020]
Therefore, the receiving member can be attached to the latch member at an optimum position with high accuracy against a slight shift in manufacturing between the door and the frame and a shift caused by a temperature change.
[0021]
【Example】
An embodiment of the present invention will be described below with reference to FIGS.
[0022]
FIG. 1 is an exploded perspective view of a locking device 1 according to an embodiment of the present invention, and FIG. 2 is a horizontal sectional view for explaining the operation of the locking device 1. This locking device 1 is used as a locking device for a portable simple toilet installed outdoors. The locking device 1 includes a locking mechanism 3 attached to the inner side of the door 2 and a locking member 5 attached to the frame body 4. The door 2 is swingably attached to the frame body 4 by a hinge or the like on one end side of the door 2 (not shown).
[0023]
FIG. 3 is a rear view of the lock mechanism 3. Referring to FIGS. 1 to 3, the locking mechanism 3 is roughly a latch member 8 that can slide and displace in a displacement direction 7 perpendicular to the swinging direction 6 of the door 2 on a horizontal plane, A housing 9 for housing the latch member 8, coil springs 10 and 11 for resiliently urging the latch member 8 in the protruding direction 7a, handles 12 and 13 operated by a user, and the latch member 8 Is provided with a holding member 14 that holds the device in a protruding state 7 a, a display member 15 that displays whether or not the locking device 1 is in a locked state, and a lid member 16.
[0024]
The latch member 8 includes a main body 8a that can slide and displace in the displacement direction 7 in the housing 9, and a spring seat 8b that is formed on the back side of the main body 8a and abuts against one end of the coil springs 10 and 11, respectively. 8c, a fitting portion 8d formed extending from the main body 8a in the projecting direction 7a, a pair of spacers 8e, 8f formed on the front side of the main body 8a, and a contact portion facing the holding member 14 8k.
[0025]
A handle 12 is fixed to the front side of the main body 8a so that the latch member 8 can be displaced from the outside of the door 2. The main body 8a is formed with an insertion hole 8g through which the shaft portion 13a of the handle 13 into which the long hole 9b formed in the bottom plate 9a of the housing 9 is loosely inserted can be inserted, and the tip of the shaft portion 13a After the portion 13b communicates with the insertion hole 8g and the washer 17, the handle 13 is attached to the main body 8a by fitting the split pin 18 into the pin hole 13c formed in the distal end portion 13b and preventing it from coming off. A rectangular portion 13e is formed at the base end portion 13d of the shaft portion 13a. When the rectangular portion 13e is fitted into the elongated hole 9b, the handle 13 is not angularly displaced, and the displacement direction 7 is increased. Sliding displacement is possible.
[0026]
The housing 9 has a recess 9c for accommodating the latch member 8, the coil springs 10, 11 and the holding member 14, and the side plate 9d forming the recess 9c has a latch 9c. 8 d of insertion parts are inserted, and the protrusion hole 9e extended in the said displacement direction 7 is drilled. On the other side plate 9f of the housing 9, guide pieces 9g and 9h are provided so as to slidably support the back side of the main body 8a.
[0027]
Further, in the housing 9, spring seats 9 i and 9 j are provided on the bottom plate 9 a so that the other ends of the coil springs 10 and 11 come into contact with each other. The coil springs 10 and 11 are compression springs. Therefore, the latch member 8 is elastically biased in the projecting direction 7a, and when the handles 12 and 13 are not operated, the fitting portion 8d has a projecting hole. Projecting from 9e.
[0028]
The holding member 14 includes an operation piece 21, a locking piece 22, and a reversing spring 23. The shaft portion 21a of the operation piece 21 communicates with an insertion hole 9k formed in the bottom plate 9a of the housing 9 and an insertion hole 22a formed in the locking piece 22, and then into a pin hole 21b formed on the tip side thereof. When the split pin 24 is fitted, it is prevented from coming off and attached to the housing 9 so as to be angularly displaceable. An oval fitting protrusion 21e is formed at the base end portion of the shaft portion 21a. Correspondingly, an oval recess 22f is formed on the operation piece 21 side of the insertion hole 22a of the locking piece 22. It is formed. Accordingly, the operation piece 21 and the locking piece 22 can be angularly displaced integrally with each other.
[0029]
The locking piece 22 includes a cylindrical portion 22b that forms the insertion hole 22a, a large diameter portion 22c that extends from one side surface of the cylindrical portion 22b, and an extension that extends from the cylindrical portion 22b to the opposite side of the large diameter portion 22c. An installation portion 22d and a locking pin 22e standing on the extension portion 22d are provided. One end 23a of the reversing spring 23 is wound around the locking pin 22e, and the other end 23b of the reversing spring 23 is wound around a locking pin 9l provided upright on the bottom plate 9a of the housing 9. .
[0030]
Further, a notch 21c is formed in the outer peripheral edge of the tip of the shaft portion 21a of the operation piece 21, and a fitting hole 15a formed in the display member 15 is fitted into the notch 21c. With the angular displacement of the operation piece 21, the locking piece 22 and the display member 15 are angularly displaced. The display member 15 is formed in an arc shape, the fitting hole 15a is formed at the center position, and two indicators 15b and 15c are formed at intervals in the circumferential direction. The index 15b indicates that the locking device 1 is unlocked, for example, blue, and the index 15c indicates that the locking device 1 is locked, for example, red.
[0031]
The lid member 16 has an operation port 16a through which the handle 12 can project, a display window 16b for selectively exposing the index 15b or 15c, and a tip portion of the shaft portion 21a of the operation piece 21. An operation hole 16c is formed. The lid member 16 includes screws 25a, 25b, and 25c inserted through the lid member 16 after the members 8, 14, 15 and the coil springs 10 and 11 are accommodated in the housing 9, respectively. It is fixed by screwing by being screwed to bosses 9p, 9q, 9r erected on 9a. The lock mechanism 3 thus completed is attached to the door 2 by screwing screws (not shown) through the flanges 9m and 9n extending from the side plates 9d and 9f of the housing 9 to the door 2, respectively. It is done.
[0032]
Even in the state where the lid member 16 is assembled in this manner, the attachment portion 12a of the handle 12 attached to the main body 8a is provided between the front surface of the main body 8a of the latch member 8 and the back surface of the lid member 16. The spacers 8e and 8f maintain a constant interval. Therefore, the display member 15 can be smoothly angularly displaced in conjunction with the angular displacement operation of the operation piece 21.
[0033]
FIG. 4 is a longitudinal sectional view of the locking member 5. The locking member 5 generally fixes the receiving member 31, a pair of mounting plates 32 and 33, bolts 34 and 35, nuts 36 and 37 corresponding to the bolts 34 and 35, and the receiving member 31. And nuts 38, 39; 40, 41.
[0034]
The receiving member 31 is formed in a gate shape, and external screws 31c and 31d are formed on the free ends of the pair of leg portions 31a and 31b. The base ends of the leg portions 31a and 31b are connected to each other by a connecting portion 31e, and form a recess for inserting the fitting portion 8d. The mounting plates 32 and 33 are respectively arranged on the front side and the back side of the frame 4, and are attached to the frame 4 by the bolts 34 and 35, washers 42 and 43, spring washers 44 and 45, and the nuts 36 and 37. Fixed. The receiving member 31 is fixed to the mounting plates 32 and 33 attached to the frame body 4 using the nuts 38 and 39, washers 46 and 47, spring washers 48 and 49, and the nuts 40 and 41.
[0035]
A holding plate 50 is interposed between the mounting plate 33 and the back surface of the frame body 4. The holding plate 50 and the frame body 4 are formed with through holes 51 and 52 larger than the outer diameters of the leg portions 31a and 31b and the bolts 34 and 35. Therefore, in manufacturing the door 2 and the frame body 4 The receiving member 31 can be attached to the optimum position corresponding to the lock mechanism 3 regardless of the slight deviation of the temperature or the temperature change. Further, by adjusting the tightening position of the nuts 38, 39; 40, 41 on the outer screws 31c, 31d of the leg portions 31a, 31b, the height of protrusion of the connecting portion 31e from the mounting plate 32 is adjusted. Thus, the fitting portion 8d of the latch member 8 can be smoothly fitted.
[0036]
Referring to FIG. 2, as shown in FIG. 2 (a), when the door 2 is closed, the back surface 8j of the fitting portion 8d is locked by the connecting portion 31e of the receiving member 31, and therefore the handle As long as 12 and 13 are not operated, the door 2 is locked without undesirably opening. When the handles 12 and 13 are displaced in the backward direction 7b, the fitting portion 8d of the latch member 8 is retracted into the housing 9, thereby releasing the locked state of the fitting portion 8d by the receiving member 31. FIG. As shown in (b), the door 2 can be opened in the direction of the arrow 6b.
[0037]
When the door 2 is closed by an operation by the user or an external force such as wind, the guide slope 8i of the insertion portion 8d slides on the connecting portion 31e of the receiving member 31 as shown in FIG. Is retracted into the housing 9 against the elastic force of the coil springs 10 and 11, and when the door 2 is completely closed as shown in FIG. Due to the generated force, the latch member 8 is displaced in the protruding direction 7a, the back surface 8j of the fitting portion 8d is locked to the connecting portion 31e, and the door 2 is held in a closed state.
[0038]
Therefore, in the present invention as described above, the door 2 can be opened or opened with good operability from either the inner side or the outer side of the door 2 only by sliding the latch member 8 by the handle 12 or 13. Can be locked. Even if the user forgets to close the door, once the door 2 is closed by an external force such as wind, the door 2 can be held in a locked state.
[0039]
FIG. 5 is a simplified front view for explaining the operation of the holding member 14. In the unlocked state of the locking mechanism 3, as shown in FIG. 5A, the large-diameter portion 22c of the locking piece 22 is in contact with the contact piece 9s formed on the bottom plate 9a of the housing 9, and in this state It is stably held by the elastic force of the reversing spring 23. Accordingly, the cylindrical portion 22 b of the locking piece 22 faces the latch member 8, and the latch member 8 can be slidably displaced in the displacement direction 7. In this state, the indicator 15b of the display member 15 faces the display window 16b, and displays that the door is unlocked on the outer side of the door 2.
[0040]
On the other hand, when the operation piece 21 is angularly operated and the lock mechanism 3 is locked, the large-diameter portion 22c of the locking piece 22 is brought into contact with the abutting portion 8k of the latch member 8 as shown in FIG. In this state and is stably held by the reversing spring 23. In this state, the large diameter portion 22c prevents the displacement of the latch member 8 in the backward movement direction 7b. In this state, the indicator 15c of the display member 15 faces the display window 16b, and displays that the lock mechanism 3 is in the locked state.
[0041]
Furthermore, as shown in FIG. 5 (b), when in the transition state between the unlocked state shown in FIG. 5 (a) and the locked state shown in FIG. The locking piece 22 is in an unstable state and attempts to displace the locking piece 22 so as to be in either the unlocked state or the locked state.
[0042]
Therefore, the locking piece 22 does not remain in the transition state, thereby enabling a smooth sliding displacement of the latch member 8.
[0043]
Further, the operation piece 21 can be angularly operated from the outside of the door 2 by inserting a flathead screwdriver into the operation groove 21 d through the operation hole 16 c of the lid member 16. Therefore, even in an emergency situation where a child accidentally operates the operation piece 21 and is trapped inside the door 2, the use of the minus screwdriver, which is a predetermined tool, allows the outside of the door 2 to be removed. Unlocking operation can be performed from the side, and safety can be improved.
[0044]
【The invention's effect】
As described above, the locking device according to the first aspect of the present invention has a guide slope facing the locking member side on the latch member that can be held or opened in the closed state by protruding or retracting from the door. In addition to the formation, a spring force is generated in the protruding direction by the spring member. Further, a holding member for holding the latch member in the protruding position is provided in association with the latch member.
[0045]
Therefore, in a slide-type locking device with good operability that allows the door to be held or opened in a closed state simply by slidingly moving the latch member, even if the user forgets to close the door, the door is once closed. Then, the latch member is locked by the locking member, and the door can be held in the closed state. Accordingly, it is not necessary to provide a separate part to hold the door in the closed state, and the configuration and the installation work can be simplified. Moreover, the structure for locking is provided integrally with the latch member, and the structure can be simplified.
[0046]
The holding member for holding and locking the latch member in the protruding position includes an operation piece that is angularly operated, a locking piece that interlocks with the operating piece, and a reversing spring that holds the state of the locking piece And comprising.
[0047]
Therefore, even if the user stops the operation in the middle of the angular displacement operation, the locking piece in the transition state is displaced to the locked position or the unlocked position by the elastic force of the reversing spring. Therefore, a stable operation can be realized with a simple structure.
[0048]
Furthermore, the locking piece can be angularly displaced from the outside of the door with a predetermined tool such as a flat-blade screwdriver.
[0049]
Therefore, even if an emergency situation occurs in which a child is trapped due to an erroneous operation, etc., the predetermined tool can be used to unlock the door from the outside, improving safety. Can do.
[0050]
A locking member for locking the latch member includes a gate-shaped receiving member and a pair of mounting plates to which the receiving member is attached, and locks the latch member. The height of the connecting portion of the receiving member can be adjusted by the screwing position of the nut screwed to the leg portion of the receiving member, and an insertion hole of the frame for the mounting bolt for mounting the mounting plate is provided Let it be a free hole.
[0051]
Therefore, the receiving member can be attached to the latch member at an optimum position with high accuracy against a slight shift in manufacturing between the door and the frame and a shift caused by a temperature change.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a lock device according to an embodiment of the present invention.
FIG. 2 is a horizontal sectional view for explaining the operation of the locking device.
FIG. 3 is a rear view of a lock mechanism attached to the door side in the lock device.
FIG. 4 is a longitudinal sectional view of a locking member attached to the frame side of the locking device.
FIG. 5 is a simplified front view for explaining the operation of a holding member that performs a locking operation;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Locking device 2 Door 3 Locking mechanism 4 Frame body 5 Locking member 6 Swing direction 7 Displacement direction 7a Projection direction 7b Retraction direction 8 Latch member 8d Insertion part 8i Guide slope 9 Housing 10 Coil spring 11 Coil spring 12 Handle 13 Handle 14 Holding member 15 Display member 16 Lid member 21 Operation piece 22 Locking piece 23 Reversing spring 31 Receiving member 31a Leg portion 31b Leg portion 31e Connection portion 32 Mounting plate 33 Mounting plate 50 Presser plate 51 Free hole 52 Free hole

Claims (1)

In a door locking device pivotally supported at one end by a frame, a housing attached to the door;
Wherein the swinging direction of the inside housing said door provided slidably in a direction intersecting, one end can protrude or retract from the other end of the door, and latching the guide slopes on the one end is formed Members,
Is fixed to the latch member, a handle can be from inward and outward side of the door be sliding displacing the latch member,
Said latch member, a spring member having one end of said latch member is resiliently biased in a direction to protrude from the other end of the door,
A holding member for holding the latch member in a protruding position,
Faces the near end of said latch member, angular displacement freely mounted on the casing, the operation member is angularly displaced operated from the inner side of the door,
In conjunction with the operation lever, the locked position abutting the other end of the latch member in a protruding position, and unlocking position which can slide displacing the latch member is retracted from the displacement region of said latch member angularly displaced between the locking piece is in advance by defining the tool, the angular displacement can be operated from the outer side of the door,
When the locking piece is in the locked position or the unlocked position, and such holding members and a reversing spring to resiliently biased to hold its state,
Provided opposite to the latch member in said frame, and a locking member having a recess for the one end of the latch member is fitted,
The locking member is provided on each of a portal-shaped receiving member that forms the recess and an external screw is formed on a leg, and an inner side and an outer side of the frame body, and the leg of the receiving member A pair of mounting plates formed with insertion holes through which the portion is inserted, the insertion holes formed in the mounting plate, and the free holes formed in the frame body, and the frame plate is sandwiched between the mounting plates A mounting bolt and a nut, and a pair of nuts for holding and fixing a leg portion of the receiving member at an arbitrary position of an external screw formed on the leg portion on the mounting plate;
Said latch member is retracted by the guide slope when the door is closed in sliding contact with the periphery of the recess of the locking member, said one end protruding to the door is fully closed the recess A locking device that is fitted and locked.

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