JP2003314111A - Lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock device preventing a misoperation and easily closing a door and a locking it rapidly. <P>SOLUTION: In the lock device with a mounting case 3 fixed by fitting an outer case 5 into a mounting hole 2 for a door 1, an inner case 9 fixing a lock body 11 by a fitting to the outer case 5 and a latch 16 for the locking and an unlocking fixed at the rear end of a rotating shaft 11a for the lock body 11, an engaging plate 14 is arranged slidably to a flange 12 at the rear end of the inner case 9 by an urging in the direction that the engaging plate is pushed against the outer peripheral surface side of the latch 16 by a spring 24. In the lock device, a door opening-closing detecting latch 33, in which a recessed groove 6 in which a rear end is formed in an opening section 7, an engaging piece 28 and an engaging surface 30 are mounted and an inserting port 6b is formed to a side wall 6a respectively in the mounting case 3 is formed in the longitudinal direction and a rear end is installed to an arcuate surface 39, a side wall 42 freely engaged or disengaged with or from the engaging plate 14 is installed to one side and an inserting recessed section 43 for the engaging plate 14 long in the longitudinal direction is formed to the side wall 42 respectively in the recessed groove 6 is constituted so as to be slidably fitted in the longitudinal direction by a backward urging by a compression spring 38. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device having a locking / unlocking latch at the rear end of a rotation shaft of a lock body, and more particularly, to a door opening device. -It relates to a lock device with a close detection latch. 2. Description of the Related Art A conventional locking / unlocking latch device has a structure in which a locking / unlocking latch can be freely rotated to a locking position and an unlocking position by a key. However, according to the conventional lock device, when the key is erroneously operated in the unlocked state, the locking / unlocking latch is rotated to the locking position. If this happens, the door cannot be closed. Therefore, the locking operation must be performed after returning the locking / unlocking latch to the unlocking position and then closing the door, which is very troublesome and time-consuming. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. In a door-open state, the locking / unlocking latch cannot be rotated, and the above-mentioned lock is only required when the door is closed. An object of the present invention is to provide a lock device in which a latch can be rotated so that an erroneous operation at the time of opening a door can be prevented, and a door can be closed and locked easily and quickly. [0005] In order to achieve the above object, the present invention provides a mounting case fixed to a door,
The lock case includes an inner case fitted and fixed to an outer case projecting rearward from the mounting case to fix and house the lock body, and a locking / unlocking latch fixed to a rear end of the rotation shaft of the lock body. A lock device, wherein a rear end of a slit provided in a flange at a rear end of the inner case has an outer peripheral surface of the locking / unlocking latch lid portion and an engaging surface provided at a predetermined angle to the outer peripheral surface. The engaging plate is arranged in a state where the engaging plate is urged by a spring interposed in each pressed direction with respect to the joint portion, and corresponding to the tip of the engaging plate, on the side wall of the concave groove provided in the front-rear direction of the mounting case. ,
An opening for inserting the engaging plate is provided, and further, the concave groove has a rear end formed in an arc surface and a side wall which engages and detachably engages the engaging plate end when the door is opened, and the engaging plate end when the door is closed. A door opening / closing detection latch formed on the side wall is provided on the side wall, and a compression spring is interposed between the groove opening and the front surface of the groove. It is characterized by being fitted in a state of being urged backward by a spring. When the door is opened, the door open / close detection latch is projected outward by the urging force of the spring. On the other hand, the tip of the engagement plate projects against the side wall of the detection latch, and the engagement plate is prevented from moving. Retained
There is no operation error. When the door is closed, the arc surface at the rear end of the detection latch abuts against a plate-shaped metal fitting fixed to the door mounting frame and is pressed forward, so that the detection latch resists the urging force of the spring. Then, the rear end of the engaging plate is immersed in the concave groove. As a result, the tip of the engagement plate protruding from the side surface of the detection latch comes off the side wall, faces the insertion concave portion on the side of the detection latch, and the engagement plate can move downward. Then, the key is locked via the rotating shaft.
When the unlocking latch is rotated in the locking direction, the engaging plate pressed and engaged with the engaging portion of the latch base moves downward against the urging force of the spring, and the leading end is inserted into the detection latch. While being inserted into the recess, the engagement with the engagement portion is released,
After climbing on the outer peripheral surface of the latch base, the latch pivots to the locked position and is locked. At this time, the rear end of the engagement plate engages with another engagement portion of the latch base, and the latch is held at the locked position. [0009] The unlocking is performed by the operation opposite to that at the time of locking. After unlocking, when the door is opened, the projecting contact between the rear end of the detection latch and the metal fitting of the door mounting frame is released, and the door open / close detection latch moves rearward due to the spring force.
The rear end protrudes outward from the opening by a predetermined length, and is maintained in this state. As described above, the rearward movement of the door open / close detection latch causes the insertion concave portion to move rearward, the leading end of the engaging plate abutting against the side wall, and the downward movement of the engaging plate is prevented. The latch is held in the unlocked position. Embodiments of the present invention will be described below with reference to the drawings. 1 shows a rear view of an unlocked state of the lock device according to the present invention, FIG. 2 shows an enlarged longitudinal sectional view taken along line AA in FIG. 1, and FIG. 3 shows a locked state of the lock device. FIG. 4 is an exploded perspective view of an inner case, an engagement plate, and a spring in which a lock main body of the lock apparatus is fitted and fixed, and FIG. 5 is an exploded perspective view of B in FIG.
FIG. 6 is an enlarged cross-sectional view taken along line B of FIG.
FIG. 7 is a cross-sectional view taken along the line C of FIG. 7, and FIG. 7 is an enlarged cross-sectional view of the locked state cut at the same position as in FIG. 6. As shown in FIGS. 1 to 3, the mounting case 3 to which an outer case 5 to be described later is fitted and fixed in a mounting hole 2 formed through the door 1 near the open end thereof is frontally mounted. The outer case 5 is formed in a substantially vertically elongated rectangular shape, protrudes rearward from the upper back surface of the front plate 4, and is integrally formed with the outer case 5. The concave groove 6 serving as the opening 7 is formed long in the front-rear direction. As shown in FIGS. 2 and 3, engagement grooves 8 are formed on the inner peripheral surface of the outer case 5 in the front-rear direction (the left-right direction in FIGS. 2 and 3). is there. On the other hand, on the outer peripheral surface of the inner case 9, engagement ridges 10, which are long in the front-rear direction,
10, the inner case 9 is inserted into the outer case 5 from the rear while the lock body 11 is fitted and fixed, and the engaging grooves 8, 8 and the engaging protrusions 10, 10 are engaged with each other. By doing so, the lock body 11 is fixed to the mounting case 3. As shown in FIGS. 2 to 4, a slit 13 is formed in the lower part of the outward flange 12 at the rear end of the inner case 9 in a direction perpendicular to the axial direction of the lock body 11, and the tip is opened. The engaging plate 14 is disposed so as to be slidable in the vertical direction along the slit 13 by engaging an engaging ridge 15 projecting from the front surface of the slit 13. As shown in FIGS. 1 to 3, the lock body 1
The rear end of one of the rotating shafts 11a is formed in a substantially oval-shaped front, while the center of a base 17 of a locking / unlocking latch 16 is formed through a hole 18 of a substantially oval-shaped front to form the rotating shaft 11a. By fitting the rear end into the hole 18, the rotation shaft 11a
The latch 16 is fixed. As shown in FIG. 1, the locking / unlocking latch 16 has an engaging recess 20 which is provided on one end of the locking / unlocking latch and is detachably engageable with a not-shown locking fitting fixed to the door mounting frame 19. Is formed so as to open laterally. The lower half of the base 17 of the latch 16 is formed in a front circular plate shape, and a locking / unlocking latch 16 is provided on a peripheral surface 17a of the latch 16 with the unlocking position A and the locking position B shown in FIG. The engaging portion 2 engages and releasably engages the rear end of the above-described engaging plate 14 in order to hold each.
1, 22 are formed at a predetermined angle α (for example, 90 °). As shown in FIG. 1, the engagement plate 14 has a substantially needle-like projection 2 projecting from the rear part of the mounting case 3 described above.
3 is hooked on the central curved portion to form a substantially V-shaped flat spring 2.
4, each end of the spring 24 is provided on the mounting case 3, and a concave spring-shaped portion 26 of the engagement plate 14 is provided.
To the engaging plate 14 and the rear end thereof to the base 17.
Is biased by a spring 24 in a direction in which the peripheral surface 17a and the engaging portions 21 and 22 are pressed against each other. As shown in FIGS. 1 to 3 and 5, the above-mentioned concave groove 6 is located below the lock body 11 of the mounting case 3 at a position corresponding to the tip 14a of the engaging plate 14. And a side wall 6a of the groove 6 is provided with an insertion port 6 at the tip of the engaging plate 14.
b. As shown in FIG. 5, the concave groove 6 protrudes forward from the center of the front end of the top wall 27 at the rear end, and has an inclined surface 29 inclined downward from the base end to the front end at the lower end. An engaging piece 28 having a spring property and having a vertical locking surface 30, a bottom wall 31, and a front wall 32 are integrally formed. On the other hand, as shown in FIG. 5, the door opening / closing detecting latch 33 has a concave portion
And the upper part of the front end is provided with the engaging piece 2
8 is provided with an engaging projection 35 that is engageable / removable with the locking surface 30, whereby the rear end of the detection latch 33 is formed so as to protrude from the opening 7 by a predetermined length 1. I have. The door opening / closing detection latch 33 is pushed into the concave groove 6 from the opening 7 at the rear end described above to hit the inclined surface 29, whereby the engaging piece 28 is pushed up and the door opening / closing detection latch 33 is opened. The closing detection latch 33 is fitted in the concave groove 6 as shown in FIG. 5, the engagement protrusion 35 engages with the locking surface 30 of the engagement piece 29, and the door opening / closing detection latch 33 The rear end protrudes outward by a predetermined length 1 and slides forward from this state by a fixed stroke. That is, the door open / close detection latch 33
Each time the rear end part of the rear end of the groove 6 comes out of the opening 7 of the concave groove 6, it slides back and forth by the above-described stroke. Further, the door open / close detection latch 33 is
As shown in FIGS. 1 and 5, one end is inserted into a long hole 37 formed in the front-rear direction substantially at the center of the front wall of the detection latch 33, and the other end is formed on the inner surface of the front wall 32 of the groove 6. A compression coil spring 38 is interposed therebetween, and the rear end is held by the spring 38 in such a manner as to be biased outward in a direction protruding a predetermined length 1 as shown in the figure. The rear end of the door open / close detection latch 33 is formed on an arc surface 39 which curves downward and rearward from the upper portion, and is fixed to the back surface of the opening of the door mounting frame 19 when the door is closed. The door opening / closing detection latch 33 is formed so as to be smoothly pushed into the groove 6 against the spring force of the compression coil spring 38 when it comes into contact with a not-shown fitting. As shown in FIG. 6, the door opening / closing detection latch 33 is provided at the end 14 of the engagement plate 14 when the door is opened.
a, the rear end of the detection latch 33 abuts against a not-shown receiving bracket of the door mounting frame 19 when the door is closed, as shown in FIG. By being pushed in and moving forward, the engagement plate 14
In order that the tip 14a may be disengaged from the side wall 42 and move downward against the urging force of the spring 24,
An insertion recess 43 as a relief portion of the engagement plate 14 is formed to be long in the front-rear direction. 2 and 3, 44
Denotes a key, and 45 denotes a support plate for supporting the inner case 9, the engagement plate 14, and the locking / unlocking latch 16 from behind to prevent detachment. The present invention is configured as described above, so that when the door is opened, the tip of the engagement plate is opened and closed.
Since the lower end of the engagement plate is prevented from moving downward by abutting against the side wall of the close detection latch, the rear end of the engagement plate is pressed and engaged with the engagement portion of the peripheral surface of the locking / unlocking latch base by the urging force of the spring. By doing so, an erroneous operation of rotating the latch in the locking direction can be prevented, and when the door is closed, the door open / close detection latch is retracted, and the tip of the engagement plate comes off the side wall of the detection latch. At the same time, the engagement plate can be moved downward in a position facing the insertion recess on the side surface of the detection latch, so that not only the door can be closed but also the locking and unlocking can be performed easily and quickly without mistake. Furthermore, since the structure is very simple,
It can be manufactured at a low failure rate and at extremely low cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a rear view of an unlocked state showing an embodiment of a lock device according to the present invention. FIG. 2 is an enlarged vertical sectional view taken along line AA in FIG. FIG. 3 is an enlarged vertical sectional view showing a locked state of the lock control device. FIG. 4 is an inner case in which a lock main body of the lock control device is provided;
It is each perspective view of an engagement board and a spring. FIG. 5 is an enlarged sectional view taken along line BB in FIG. 1; FIG. 6 is an enlarged cross-sectional view taken along the line CC in FIG. 1 and showing an open state of the door. FIG. 7 is an enlarged cross-sectional view showing a closed state cut at the same position as in FIG. 6; [Description of Signs] 1 door 2 mounting hole 3 mounting case 5 outer case 6 concave groove 6a, 42 side wall 7 opening 9 inner case 11 lock body 11a rotating shaft 12 flange 13 slit 14 engaging plate 16 locking / unlocking latch 24 , 38 spring 28 engagement piece 33 door open / close detection latch 43 insertion recess

Claims (1)

Claims: 1. A mounting case fixed to a door, an inner case in which a lock body is fixedly housed by being fitted and fixed to an outer case projecting rearward from the mounting case, and the lock body. A locking / unlocking latch fixed to the rear end of the rotation shaft, wherein the locking / unlocking latch is provided at a rear end of a slit provided in a flange at a rear end of the inner case. For the outer peripheral surface of the lid portion and each engaging portion provided at a predetermined angle on the outer peripheral surface, an engaging plate is disposed in a state of being urged by a spring interposed in each pressed direction, and Corresponding to the front end, an insertion hole for an engaging plate is opened on the side wall of the concave groove provided in the front-rear direction of the mounting case, and further, the rear end of the concave groove has an arcuate surface, and when the door is opened, A side wall that engages and detachably engages the tip of the engagement plate, and an insertion recess that allows the tip of the engagement plate to be inserted and removed when the door is closed. The door open / close detection latch formed on the side wall is protruded and retractable with respect to the groove opening, and a compression spring is interposed between the groove and the front wall of the groove, and biased rearward by the spring. A lock device which is fitted in a state.