JP3281293B2 - Door locking mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a locking device in which a movable member constituting a locking device does not move in a locking direction when a door is opened, and the locking member moves in the locking direction without being moved. The present invention relates to a locking mechanism that does not damage a fixed frame to which a door is attached.

[0002]

2. Description of the Related Art Conventionally, when a handle on the front of a door is operated,
A pair of upper and lower rod members reciprocate up and down on the back of the door, and the rod members are disengaged from a fixed frame to which the door is attached, and the door can be locked or unlocked by the disengagement. Locking mechanisms are well known.

[0003]

In the door having the locking mechanism, when the door is locked, the rod members extend vertically from the upper edge and the lower edge of the door and engage with the fixed frame. However, if the rod member extends from the upper and lower edges in this way when the door is open, when the door is closed without noticing that, the extended end of the rod abuts against the fixed frame and the rod member Or the fixed frame is damaged.

Therefore, it is an object of the present invention to propose a locking mechanism in which a movable member such as the rod member does not extend outside the door when the door is open.

[0005]

In order to solve the above-mentioned problems, the present invention is based on the premise that a locking device for locking a door to a fixed frame and the locking device when the door is open are provided. This is a door locking mechanism constituted by a holding device for keeping the device in an unlocked state.

On the premise, the features of the present invention are as follows. An operating handle located on the front of the door, a plate member located on the back of the door and rotating with the handle,
An upper rod member and a lower rod member attached to a member and capable of reciprocating in a substantially vertical direction of the door, and operating the handle to move an upper end of the upper rod member
A part and a lower end of the lower rod member can be locked by extending outward from an edge of the door and engaging with the fixed frame, and an upper end of the upper rod member and the lower rod member can be locked.
When a lower end portion of is detached from the fixing frame retract inwardly of the door it is configured to be able to unlock, the holding device, and the engaging member relative to the locking device, the locking is constituted by a biasing means acting on the coupling member, the engaging member is reciprocally moveable in the horizontal direction is located on the rear side of the door, one end of the horizontal direction of the door while extending from the edge outward, the said locking device opposite end of the one end inside said edge
The upper rod member and the lower rod member are configured to be detachable from one of the upper rod member and the lower rod member.
One of the pad members is radially outward from its peripheral surface.
An extending pin member and a lateral end at an opposite end of the engagement member.
A curved portion having a J-shape is formed, and a top of the curved portion is formed.
Surface is disengageably to said pin member, wherein the engagement member when the door is opened, by moving the extending direction of the one end under the action said biasing means, said The top surface of the curved portion at the opposite end is separated from the fixed frame
It engages the pin member of said rod member, who leaves a direction for engaging the fixed frame of the rod member from the fixed frame
Prevents the movement of the direction Prefecture, when the door is closed, and in contact with the vessels of the one end portion extending from said door is positioned near the one end engaging member against said biasing By moving, the opposite end of the rod member to the pin member
The top surface of the curved portion is disengaged, and the rod member can be moved in the direction of engaging with the fixed frame.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a locking mechanism according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of a distribution board storage box 1, and a door 2 of the box 1 employs a locking mechanism according to the present invention. However, in the internal structure of the box 1, only the rod members 11, 12 and the engaging member 34 are shown by dashed lines, and the other components are not shown. The door 2 is attached to the box body 4 via a hinge 5 so as to be openable and closable.
It has an operation handle 3 for unlocking. The door 2 in the figure is
The upper and lower rod members 11, 12 which are in a closed state with respect to the main body 4 and which are attached to the back surface of the door 2 have engagement holes 6A, 6A, formed in the upper edge 6 and the lower edge 7 of the main body 4. 7A (see FIG. 2) and is in a locked state. Handle 3
Is turned in the counterclockwise direction indicated by the arrow P, the upper rod member 11 moves in the direction of the arrow Q and descends, while the lower rod member 12 moves in the direction of the arrow R and rises.
The engagement of the 12 with the main body 4 is released, and the door 2 can be opened.

FIG. 2 is a partial view of the door 2 and the main body 4 of FIG. A shaft 17 having a rectangular cross section extends from the handle 3 on the front of the door to the inside of the main body 4 through the door 2, and a plate member 18 is attached to an inner end of the shaft 17. The plate member 18 includes the handle 3
Is turned together with the shaft 17 in the turning direction. The upper rod member 11 and the lower rod member 12 are attached to the plate member 18 at positions symmetrical with respect to the shaft portion 17. Support pins 19, 20 extend from the plate member 18 perpendicularly to the plane of the drawing, and one end of each of the pins 19, 20 has an engagement hole formed in each of the upper and lower rod members 11, 12. (Not shown), and the other ends of the pins 19 and 20 are fixed to the plate member 18. Therefore, when the plate member 18 is rotated counterclockwise or clockwise by operating the handle 3, the upper rod member 11 moves substantially vertically downward as indicated by an arrow Q (see FIG. 1) or upward opposite thereto. , The lower rod 22 moves substantially vertically upward, as indicated by the arrow R, or downward, opposite thereto. In the figure, the upper rod member 11 is moving upward, and the upper end 11A of the rod is located at the upper edge 2A of the door 2.
Extending from the through hole 2B of the main body 4, the engaging hole 6A
Has entered. The lower rod member 12 is moving downward, and the lower end portion 12A of the rod is located at the lower edge 2C of the door 2 through the through-hole 2D.
And enters the engagement hole 7 </ b> A of the lower edge 7 of the main body 4.

FIG. 3 is a view similar to FIG. 2, but FIG.
Is turned in the counterclockwise direction P to unlock, and the door 2 has begun to open. When the handle 3 turns counterclockwise P, the plate member 18 turns clockwise in FIG. The upper rod member 11 descends in the direction of the arrow Q, and the upper end 11A comes out of the through hole 6A of the main body 4 and the through hole 2B of the door 2 and retreats to the inside of the door 2. The lower rod member 12 rises in the direction of the arrow R, and the lower end 12A comes out of the through hole 7A of the main body 4 and the through hole 2D of the door 2 and retreats to the inside of the door 2. Therefore, when the door 2 opens and closes, the upper and lower rod members 11 and 12 do not come into contact with the main body 4.

In the door 2 in the unlocked state, the engaging member 34 that can reciprocate in the horizontal direction indicated by the double-headed arrow S moves rightward in FIG. 3 and is formed on the left end side of the engaging member 34. The horizontal J-shaped curved portion 31 is engaged with the pin member 26 extending radially outward from the peripheral surface of the upper rod member 11. When the upper rod member 11 attempts to move in the ascending direction and the descending direction ,
The pin member 26 abuts on the top surface of the curved portion 31 and its ascent and descent are stopped. In this state, the lowering and raising of the lower rod member 12 are also stopped. therefore,
In the unlocked door 2, the upper and lower rod members 11, 12
The upper and lower ends 2A and 2B do not go outside.

FIGS. 4 and 5 are sectional views taken along line IV-IV of FIG. 2 and sectional views taken along line VV of FIG. 3, respectively, showing when the door 2 is closed and when it is open. 3 shows the state of the engaging member 34. The engaging member 34 is located on the back side of the door 2, extends horizontally in the width direction of the door 2 (see FIG. 1), and has a relatively thin inner portion located near the upper rod member 11. An end (opposite end) 36 and an outer end (one end) extending horizontally through a through hole 37 formed in a side edge 9 to which the hinge 5 of the door 2 is attached. 39. The engaging member 34 is fixed to the first support member 47 having an L-shaped cross section and welded to the door 2 inside the side edge portion 9 via a screw 48. The first and second parallel members 1 and 2 with the second support member 49 having an L-shaped cross section
The through holes 41 and 42 formed in the support walls 47A and 49A are slidably inserted in the horizontal direction. First and second support walls 4
7A and 49A, the engaging member 34 has a stopper pin 43 extending radially outward.
A coil spring (biasing means) 44 is interposed between the support wall 49A and biases the engaging member 34 in a direction extending from the side edge 9 of the door 2.

When the door 2 is closed (see FIGS. 1, 2 and 4), the outer end 39 of the engaging member 34 abuts on the inward folded portion 38 at the side edge of the main body 4, Pin 4
The spring 44 is compressed through the spring 3. The curved portion 31 of the inner end portion 36 of the engagement member 34 is located on the left side of the pin member 26 of the upper rod member 11 in the figure (see FIG. 2). Therefore, in this state, even if the upper rod member 11 descends, it does not come into contact with the engagement member 34.

In FIG. 5, when the door 2 in the unlocked state starts to open and the opening angle between the side edge 9 of the door 2 and the folded portion 38 of the main body 4 starts to increase, the door is urged by the spring 44. The engaged member 34 moves in the direction extending from the side edge 9 (to the right in the drawing). The inner end portion 36 of the member 34 has an upper rod member 1 whose curved portion 31 has been lowered at this time.
The first pin member 26 is engaged from the left side in the figure (see FIG. 3). In such an engaged state, even if the handle 3 is turned in the clockwise direction opposite to the P direction, the handle 3 does not move, and the lower rod member 12 is prevented from lowering by its own weight. The upper and lower ends 11A and 12A of the doors 11 and 12 do not go out of the upper and lower edges 2A and 2B of the door 2. Therefore, when the door 2 is closed, the trouble that the upper and lower end portions 11A and 12A extend from the through holes 2B and 2D of the door 2 and abut against the main body 4 can be avoided. Such troubles are often seen in conventional doors not provided with the mechanism according to the present invention.

When the door 2 is closed, the engaging member 34 moves to the left in FIG. 5 with its outer end 39 abutting against the folded portion 38 of the main body 4 and the curved portion 31 of the inner end 36 moves upward. By disengaging the rod member 11 from the pin member 26, the handle 3 can be turned in the locking direction opposite to the P direction.

In the locking mechanism according to the present invention, in addition to the illustrated example, the inner end 36 of the engaging member 34 can be engaged with the lower rod member 12 in the unlocked state, or the plate member 1 can be engaged.
The pin member 19 or 20 of FIG. 8 may have an appropriate length, and the inner end 36 may be engaged with the pin member.

[0017]

In the locking mechanism according to the present invention, the locking member which extends from the edge of the door during locking and engages with the fixed frame and moves up and down so as to retreat inside the edge when unlocking the door is provided. When the door is open, the movement in the direction extending from the edge portion is prevented by the engagement of the engaging member that reciprocates in the width direction of the door as the door is opened and closed. Therefore, when the door is closed, there is no danger that the locking member extends from the edge and abuts on the fixed frame.

[Brief description of the drawings]

FIG. 1 is a front view of a distribution board box.

FIG. 2 is a partial rear view of the door in a locked state.

FIG. 3 is a partial rear view of the door in an unlocked state.

FIG. 4 is a sectional view taken along the line IV-IV of FIG. 2;

FIG. 5 is a view taken along a line VV in FIG. 3;

[Explanation of symbols]

 2 Door 3 Handle 4 Fixed frame (box body) 9 Edge (side edge) 11, 12 Movable member (upper / lower rod member) 34 Engagement member 36 Opposite end (inner end) 39 One end (outer end) 44 biasing means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References: Jikken Sho 31-3799 (JP, Y1) Jigyo 37-90 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) E05C 9/06

Claims (1)

(57) [Claims] 1. A lock for locking a door to a fixed frame.
Device and unlocking the locking device when the door is open
Door locking constituted by a holding device for keeping the state
An operating handle, wherein the locking device is located on a front surface of the door.
And located on the back of the doorRotates with the handle
A plate member to be attached to the plate memberFruit of the door
Can reciprocate qualitatively verticallyUpper rod member and lower
Rod memberThe handle is operated to
The upper end of the upper rod member and the lower end of the lower rod memberTo
Extending outward from the edge of the door and engaging with the fixed frame
Can be lockedUpper end of upper rod member
And the lower end of the lower rod memberRemoved from the fixed frame
LethandCan be unlocked by retracting inside the door
The holding device, the engagement member to the locking device,Previous
RecordBiasing means acting on the engagement member.
The engaging member is located on the back side of the door and
It can reciprocate in the horizontal direction,SaidOne end in the horizontal direction
While extending outward from the edge of the door,SaidOne end anti
The opposite end is inside the edge and the locking deviceUpper lot
One of the lower member and the lower rod memberCan be disengaged
It is composed ofEither the upper rod member or the lower rod member
Has a pin member extending radially outward from a peripheral surface thereof,
At the opposite end of the engagement member, a curved portion having a horizontal J-shape is provided.
The top surface of the curved portion is formed with respect to the pin member.
Can be disengaged,  When the door is open, the engagement member is configured to urge the urging member.
By moving the one end in the extending direction under the action of
R,The opposite endThe top surface of the curved partIs separated from the fixed frame.
Is offPin member of the rod memberEngages withSaidB
Direction of the pad member engaging with the fixed frameAnd from the fixed frame
The direction to leaveWhen the door closes,
The one end extending from the door is located near the one end.
The engaging member moves against the urging object in contact with the
By doingThe rod member with respect to the pin memberPrevious
Opposite endOf the top of the curved part ofDisengage,The rod
Department LumberCan be moved in a direction to engage with the fixed frame.
The mechanism described above.