JPH0567782U - Auxiliary door locking device - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] To provide an auxiliary door locking device that displays the auxiliary door when it is not locked and prevents the main door from being closed. [Structure] By rotating an operating member 15 provided on the auxiliary door A, a pair of locking rods project from above and below the auxiliary door and are fitted into a fitting hole of a door frame to lock and fix the auxiliary door. The auxiliary door locking device is characterized in that the operating member or a member interlocking with the operating member projects from the open end of the auxiliary door when the locked state by the locking rod is released. [Effect] When the locking rod releases the locked state of the auxiliary door, the operating member of the locking rod or the member interlocking with the operating member is projected from the open end of the auxiliary door. It can be seen at a glance whether or not the door is locked, and it is possible to avoid a situation in which the lock is misidentified as locked and the main door is locked to damage the locking rod or the door.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for locking and fixing an auxiliary door, which is opened at the time of carrying in and out of a large article or an emergency, to widen the frontage of the entrance, in a closed state during normal use. ..

[0002]

[Prior art and its problems]

 Generally speaking, an auxiliary door is provided with a main door at an entrance and exit that has an opening of a size required when a large article is carried in or out of the room, and a large opening is provided when a person goes in and out. It is a door that is kept closed during normal use that is not needed.As a device for fixing this auxiliary door to the closed state, the locking rod is operated by operating the lever provided at the open end of the auxiliary door. A device is known in which the locking rod is projected from the upper and lower ends and is engaged with a part of the door frame to be fixed. In the hitherto known locking device, the lever for operating the locking rod is operated only during operation, that is, by the locking rod so as not to hit the open end of the main door that opens and closes the entrance and exit during normal use. It was configured so that it would not project from the open end of the auxiliary door in the stopped state and the unlocked state. However, in the locking device having the above-mentioned configuration, when the auxiliary door is opened and then closed to restore the normal use state, the auxiliary door has a mark as to whether it is unlocked or locked. Since there was nothing to do, I forgot to operate the lever, closed the main door in the unlocked state, and locked the main door to the auxiliary door. If you forget to fix the auxiliary door and lock the main door, the main door and the auxiliary door are in a state of being connected via the locking rod, so that the locked main door cannot be opened. When force was applied, not only the main door but also the auxiliary door rocked in the opening direction, and large stress was applied to the locking rod, which could damage the locking rod and the door.

[0003]

[The purpose of the device]

 In order to solve the above-mentioned problems of the prior art, the present invention provides an auxiliary door locking device that displays the auxiliary door when it is not locked and prevents the main door from being closed. The purpose is that.

[0004]

[Disclosure of device]

 In the auxiliary door locking device according to the present invention, a pair of locking rods project from the upper and lower ends of the auxiliary door by rotating an operating member provided on the auxiliary door, and are fitted into a fitting hole of a door frame. However, in the auxiliary door locking device that locks and fixes the auxiliary door, the operating member or a member that interlocks with the operating member should protrude from the open end of the auxiliary door when the locked state by the locking rod is released. It is characterized by.

[0005]

[Work]

 In the unlocked state, the operating member of the locking rod projects from the open end of the auxiliary door and serves as a mark for the unlocked state. When the main door is closed even if this mark is overlooked, the main door hits this protruding operating member and cannot be closed.

[0006]

Embodiment 1 FIG. 1 is a front view in a closed state of an auxiliary door provided with a locking device of the present invention and a main door for opening and closing a door locked to the auxiliary door, in which A is a hinge A ′, A is a hinged auxiliary door, B is a main door that opens and closes the hinged doors hinged by hinges B'and B ', and 1 is a casing that constitutes the device of the present invention, and is attached to the open end side of the auxiliary door A. The front plate 11 has a fitting hole 11a which is attached to the main door B and into which the locking rod 21 of the locking device 2 is fitted. Locking rods 12 and 12 are fixed to the ends of the connecting rods 13 and 13 extending from the upper and lower portions of the case sink 1, respectively, and are fitted to receiving brackets provided above and below the door frame C. As a result, the auxiliary door A is fixed to the door frame C. 2 and 3 are perspective views showing the internal structure of the casing 1, in which the sliders 14 and 14 to which one ends of the connecting rods 13 and 13 are fixed and the lever 15 as an operating member for operating the sliders are housed. Has been done. The sliders 14 and 14 are constructed so that the slots 14a and 14b are guided by pins 16 and 16 fixed to the casing 1 to slide up and down, respectively, and a rack that meshes with a pinion 17 pivotally supported by the pin 16 below. 14c and 14c are formed. The lever 15 is rotatably supported on the casing 1 by a pin 15a so as to be rotatable within a range of about 90 degrees, and a pin 15b fixed to a part of the lever is inserted into an operation hole 14d formed in the upper slider 14. It is fitted. In the state of FIG. 2, the auxiliary door A is locked and fixed, and the locking rod 21 of the locking device 2 of the main door B is locked by being fitted into the fitting hole 11a of the front plate 11 of the casing 1. The lever 15 is flush with the front plate 11 so as not to hinder the closing of the main door B. When the main door B is opened from the locked state, the cylinder lock 22 or thumb turn (not shown) attached to the main door B is operated to retract the locking rod 21 of the locking device 2 to unlock it. The door B is opened, but the auxiliary door A in this case is a part of the door frame C in a fixed state. Thus, when a large opening is required for carrying in and out a large article such as in an emergency, when the main door B is opened and the lever 15 is pulled out with a finger, the lever 15 uses the pin 15a as a fulcrum. Since the pin 15b fitted in the operation hole 14d rotates clockwise and pushes down the lower end edge of the operation hole, the upper slider 14 descends, and the upper locking rod 12 integral with the slider moves the door. When the slider 14 on the upper side descends from the bracket of the frame C and the slider 14 on the upper side descends at the same time, the pinion 17 meshing with the rack 14c of the slider rotates counterclockwise to push up the rack 14c of the lower slider 14 and 14 rises, and the locking rod 12 integrated with the slider escapes from the metal fitting of the door frame C, and the locking of the auxiliary door A by the locking rods 12 and 12 is released. At this time, the lever 15 rotates 90 degrees and projects from the open end of the auxiliary door A as shown in FIG. Therefore, even if the auxiliary door A is opened and goods are carried in and out, and the auxiliary door A is closed again, the lever 15 still protrudes. Therefore, when the main door B is to be closed. By noticing that A is not locked, pushing the lever 15 causes the sliders 14 and 14 to slide symmetrically up and down, contrary to the above, so that the locking rods 12 and 12 receive the door frame C. The auxiliary door A is locked and fixed by fitting the metal fittings. Further, even if the user does not notice that the lever 15 is protruding, when the main door B is closed, the main door B hits the lever 15 and cannot be closed. Therefore, the auxiliary door A is not locked. I understand.

[0007]

Second Embodiment FIG. 4 is a rear view of a main part of a second embodiment of the device of the present invention, in which the pin 16 pivotally supporting the pinion 17 of the first embodiment is rotated integrally with the pinion 17. The rotation shaft is made to project from the interior door surface of the auxiliary door A, and the lever handle 15 'is attached to the tip of this rotation shaft as an operation member. The pinion 17 is directly rotated by rotating the lever handle 15 ', and the sliders 14 and 14 slide up and down symmetrically and the locking rods 12 and 12 of the door frame C are rotated as described in the first embodiment. Although it is engaged with and disengaged from the fitting hole, in the unlocked state, a part of the lever handle 15 'projects from the open end of the auxiliary door A to release the unlocked state like the lever 15 of the first embodiment. Show.

[0008]

[Third Embodiment] FIG. 5 is a rear view of an essential part of a third embodiment of the device of the present invention, in which a thumb turn 15 ″ is attached instead of the lever handle 15 ′ of the second embodiment. When the thumb turn 15 ″ is rotated, the sliders 14 and 14 slide symmetrically upward and downward as in the second embodiment. However, since the lever 15 rotates in conjunction with this slider, when the lock is released. The lever 15 projects from the open end of the auxiliary door to show the unlocked state. In this case, the lever acts not as an operating member but as a member indicating the unlocked state.

[0009]

[Effect of the device]

 According to the auxiliary door locking device of the present invention, the operating member of the locking rod or the member interlocking with the operating member of the auxiliary door when the locking state of the auxiliary door by the locking rod is released. By making it protrude from the open end, it can be seen at a glance whether the auxiliary door is locked when the auxiliary door is closed, and it is mistakenly recognized that the auxiliary door is locked like the conventional device. It is possible to avoid the situation where the door is locked and the locking rod and the door are damaged.

[Brief description of drawings]

FIG. 1 is a front view of an auxiliary door and a main door equipped with the device of the present invention in a closed state.

FIG. 2 is a front perspective view of an essential part of the device of the present invention in a locked state.

FIG. 3 is a front perspective view of an essential part of the device in the unlocked state.

FIG. 4 is a rear view of the essential parts of the same device, showing a second embodiment in the unlocked state.

FIG. 5 is a rear view of the essential parts of the third embodiment of the device in the unlocked state.

[Explanation of symbols]

 A Auxiliary door B Main door 1 Casing 12 Locking rod 13 Connection rod 14 Slider 15 Operating member 2 Locking device 21 Locking rod

Claims (4)

[Scope of utility model registration request] 1. A pair of locking rods project from the upper and lower ends of the auxiliary door and are fitted into a fitting hole of a door frame by rotating an operating member provided on the auxiliary door to lock and fix the auxiliary door. In the locking device of the auxiliary door, the operating member or the member interlocking with the operating member projects from the open end of the auxiliary door when the locked state by the locking rod is released. Stop device. 2. The operating member according to claim 1 is a lever provided at the open end of the auxiliary door, and part of the lever projects from the open end of the auxiliary door when the locked state by the locking rod is released. The auxiliary door locking device according to claim 1, wherein: 3. The lever handle provided on the side surface of the auxiliary door as the operating member according to claim 1, wherein a part of the lever handle protrudes from an open end of the auxiliary door when the locked state by the locking rod is released. The locking device for the auxiliary door according to claim 1, wherein: 4. The operation member according to claim 1 is a thumb turn provided on a side surface of the auxiliary door, and a part of the member interlocking with the thumb turn when the locking state by the locking rod is released is an open end of the auxiliary door. The locking device for the auxiliary door according to claim 1, wherein the locking device projects from the auxiliary door.