JPH10280748A - Locking structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a locking device which can securely lock and which has a simple structure and smaller number of parts and does not easily go wrong and further which is inexpensive. SOLUTION: This locking structure is constituted of a fitting seat to be fitted to the face of a member to be fixed, a handle member to be rotatably provided on the fitting seat, a lock housed in the inside of the member to be fixed to open or close the member in accordance with the rotary movement of the handle, a locking member 19 rotatably provided on the fitting seat, and an interlocking means of locking provided in the inside of the fitting seat to restrict the rotation of the handle by the interlocking movement of the locking member 19. In this case, the interlocking means of locking is provided with a locking piece 25 provided with a fitting groove 24 engaging with the shaft of the handle, and actuation means 22, 23 vertically moving the locking piece by the interlocking rotary movement of the locking member. The shaft of the handle engages with the fitting groove to prevent the rotary movement of the handle when the locking piece is positioned in the upper position or the lower position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking mechanism for a handle of a lever handle, a knob, or the like used for an interior door, an exterior door, a door of furniture, or the like.

[0002]

2. Description of the Related Art Handles such as lever handles and knobs are provided on both sides or one side of a door or door as a member to be fixed, and by rotating the handle, a lock (latch) housed inside the member to be fixed is latched. Operate to open and close doors.

[0003] More specifically, a rotating shaft of a handle such as a lever handle or a knob is provided with a rotating wheel that rotates integrally therewith. The rotating wheel is freely rotatable around the top in a left and right direction within an angle range of 45 degrees each, and a stopper for regulating the rotating angle range is provided.

On the other hand, there is provided a knob which is a locking operation member for switching between a locked state and an unlocked state of the door, and a locking interlocking mechanism for locking the door in conjunction with the rotation of the knob shaft is provided on the mounting base. Provided inside. This locking interlocking mechanism vertically moves a locking piece having an engagement protruding piece at an end thereof that can be engaged with the engagement groove of the rotating wheel with the rotation of the knob. When the engaging projection is engaged with the engaging groove of the rotating wheel, the handle is prevented from rotating, and the latch is deactivated to perform locking.

[0005]

In such a conventional locking mechanism, a shaft having a generally rectangular section is used as a rotation shaft of the handle. Then, after the mounting base and the latch are fixed to the door, the knob is rotated to engage the engaging protrusion of the locking piece with the engaging groove of the rotating wheel to lock, and then the handle shaft is inserted and inserted. Let it be attached.

However, since the rotating wheel can freely rotate about the top within the angle range regulated by the stopper, the engaging groove of the rotating wheel is not set at a predetermined position (that is, the engaging projection is A pseudo-locked state in which the knob is rotated in a state in which the knob is not engaged with the engagement groove occurs.

When the handle is attached in a pseudo locked state,
The operator locks the lock but misunderstands that the rotating wheel is not in the correct position, or tries to insert the handle shaft into the rotating wheel again, but since the rotating wheel is not rotated by the stopper, the handle is turned by force. In order to move it, the shaft and the rotating wheel are damaged, and the handle itself must be replaced.

Further, the conventional locking mechanism has a problem that the number of parts is large and the cost is increased.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a locking mechanism that can securely lock.

It is another object of the present invention to provide a locking mechanism which cannot lock when the fitting members for locking are not at predetermined positions and does not cause a so-called pseudo locking state.

It is another object of the present invention to provide an inexpensive locking mechanism in which the structure of the locking mechanism is simplified, the number of components is reduced, and a failure is hardly caused.

That is, the locking mechanism according to the present invention comprises a mounting pedestal mounted on a surface of a fixed member, a handle member rotatably provided on the mounting pedestal, and a rotation of the handle member accommodated inside the fixed member. A lock that opens and closes the fixed member with the lock operation member rotatably provided on the mounting base,
Locking interlocking means provided inside the mounting pedestal and interlocking with rotation of the locking operation member to prevent rotation of the handle member, and the locking interlocking means engages the shaft of the handle member. It has a locking piece provided with an engagement groove, and an actuating means for moving the locking piece up and down in conjunction with the rotation of the locking operation member. When the locking piece is at the upper position or the lower position, The shaft is engaged with the engagement groove to prevent rotation of the handle member.

[0013] The operating means may be configured to include a gear that rotates in conjunction with the locking operation member, and a rack provided on the locking piece and meshing with the gear. Alternatively, it may be configured to have a cam that rotates in conjunction with the locking operation member and a cam receiver provided on the locking piece and engaged with the cam. The actuation means is preferably
It further has a guide piece for guiding the movement path of the locking piece.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a locking mechanism according to the present invention will be described in detail with reference to the accompanying drawings. In this embodiment, the locking mechanism of the present invention is applied to a handle of a lever handle.

Referring to FIG. 1, a mounting base 2 is mounted on a door 1 which is a fixed member. The mounting base 2 is the door 1
The main member 2a is attached to one surface of the door 1 such that the leading edge of the flange 3 is in close contact, and the auxiliary member 2b is attached to the other surface of the door 1. A space provided by the flange portion 3 is formed between the rear surface of the main member 2a and the mounting surface of the door 1, and a locking interlocking mechanism described later is provided in the space.

Each of the main member 2a and the auxiliary member 2b constituting the mounting base 2 is generally made of wood, metal or plastic, and is fixed to the door 1 by any mounting means, and the main member 2a and the auxiliary member 2b are fixed. Are integrally joined. In the illustrated embodiment, the auxiliary member 2
b, cylindrical projections 4, 4 having a pair of female threads from the back side
Are inserted through the through holes 5 and 5 of the door 1, and the screws 7 and 7 screwed into the screw holes 6 and 6 of the main member 2 a at the tip thereof
Although these members 2a and 2b are fixed to the door 1 by being screwed together, it goes without saying that other attachment means may be adopted.

A latch 10 which is a lock is attached to the opening of the door 1 by a mounting plate 8 and screws 9 and 9, and is housed inside the door.

A lever handle 11 as a handle member is rotatably provided on the mounting base 2. The lever handle 11 in the illustrated embodiment has a first handle member 11a and a second handle member 12b provided on both surfaces of the door 1 and is integrally connected thereto. A lever handle shaft 12 fixed to the member 11b sequentially passes through holes 13, 14, and 15 formed in the mounting auxiliary member 2b, the door 1, and the mounting main member 2a, and rotates integrally with the first handle member 11a. To be combined.

The lever handle shaft 11 generally has a rectangular or hexagonal shape or an oval cross-sectional shape having a pair of parallel surfaces and a pair of semi-circular arc surfaces, and a first handle member having a complementary cross-sectional shape. 11a, these handle members 11a, 1
1b rotates integrally.

The lever handle shaft 11 is inserted through a shaft hole 17 of the latch 10 housed inside the door 1. The latch shaft hole 17 is also formed complementarily to the cross-sectional shape of the lever handle shaft 11, and thus the opening and closing of the door 1 is performed by operating the tip operating member 18 of the latch 10 by rotating the lever handle 11 as is known. Making it possible.

The mounting auxiliary member 2b is provided with a rotatable knob 19 as a locking operation member. The rotary shaft 20 of the knob 19 passes through the door 1 and is connected to the knob shaft 21 of the mounting main member 2a on the opposite side, and the knobs 19 are rotated so that the knob shafts 20, 21 are integrally rotated. Have been. Although not shown, the mounting main member 2a is also provided with a knob that can be turned in the same manner as the shaft 21.

Referring to FIG. 2, which shows an unlocked state in which the door 1 can be opened and closed with respect to a locking interlocking mechanism provided in a space formed between the flange 3 of the mounting main member 2a and the surface of the door 1. The details will be described below. The locking interlocking mechanism is generally made of metal or plastic.

The locking interlocking mechanism operates depending on the rotation of the shaft 20 (21) in response to the operation of the knob 19, and moves the door 1 from the unlocked state (FIG. 2) to the locked state (FIG. 3) or vice versa. Switch from the locked state to the unlocked state.

The locking interlocking mechanism in the illustrated embodiment has a gear 22 that rotates in conjunction with a knob shaft 20, a rack 23 that meshes with the gear 22 at the upper end, and an engaging groove that can engage the lever handle shaft 12. A lock piece 25 having a lower end 24 is provided, and a pair of guide pieces 26, 26 for guiding the movement path of the lock piece 25. That is, when the knob 19 is rotated by the operation of the knob 19, the gear 22 of the locking interlocking mechanism is simultaneously rotated in the same direction, and the locking piece 25 having the rack 23 meshing with the gear 22 moves up and down along the guide piece 26. Go to

In the state shown in FIG. 2, the knob 19 is in the vertical position, the gear 22 is engaged with a portion near the lower end of the rack 23, and the engagement groove 24 is retracted upward from the insertion hole 14 of the lever handle shaft 12. In position. Therefore, the lever handle shaft 12 is not engaged with the engagement groove 24, and free rotation operation of the lever handle 11 is allowed, and the door is opened and closed by the operation of the interlocking latch 10 as described above. That is, FIG. 2 shows an unlocked state in which the door 1 can be opened and closed.

When the knob 19 is rotated clockwise from the unlocked state in the figure, the gear 22 and the rack 23 which rotate in the same direction in conjunction with each other mesh with each other, so that the locking piece 25 is connected to the guide pieces 26, 26. When the knob 19 is moved downward while being guided by being sandwiched therebetween, and the knob 19 is rotated approximately 90 degrees clockwise, the state of FIG. 3 is obtained. At this time, since the lever handle shaft 12 inserted into the hole 14 is engaged with the engagement groove 24 of the locking piece 25 moved to the lower position, the rotation of the lever handle 12 is restricted. That is, in this position, even if an attempt is made to operate the lever handle 12, the lever handle 12 cannot be turned. Therefore, the operating member 18 of the latch 10 is held at the protruding position shown in FIG. 1, and the door 1 is locked in the closed state. You.

The door 1 can be returned from the locked state in FIG. 3 to the unlocked state in FIG. 2 by rotating the knob 19 approximately 90 degrees counterclockwise from the position in FIG. The operation of the locking interlocking mechanism at this time is opposite to the above and is self-evident.

Although the knob 19 is provided rotatably in this embodiment, it is provided so as to be vertically movable.
The lock piece 25 may be directly connected to the lock piece 25, and the lock piece 25 may be moved up and down directly by the vertical movement of the knob. In this case, the gear 22 and the rack 23 are unnecessary.

A different embodiment of the locking interlocking mechanism is shown in FIG. 4 (unlocked state) and FIG. 5 (locked state).

This locking interlocking mechanism has a cam 27 which rotates with the knob 19, a cam receiver 28 which engages with the cam 27 at the upper end, and an engagement groove 29 which can engage the lever handle shaft 12 with a lever 27. A moving path of the locking piece 32 that is moved by the engagement of the cam 27 and the cam receiver 28 with a locking piece 32 having an operating portion 31 having an opening formed by a circular window 30 into which the handle shaft 12 is loosely fitted. And a pair of guide pieces 33, 33 for guiding the vehicle.

When the knob shaft 20 is in the horizontal position shown in FIG. 4, the locking piece 32 is in the lower position, and the lever handle shaft 12 is loosely fitted in the circular window 30 of the action portion 31. Therefore, the free rotation operation of the lever handle 11 is permitted, and the door is opened and closed by the operation of the interlocking latch 10 as described above. That is, FIG. 4 shows an unlocked state in which the door 1 can be opened and closed.

When the knob 19 is rotated clockwise in the figure from the unlocked state, the locking piece 3 is engaged by the engagement of the cam 27 and the cam receiver 28 which rotate in the same direction in conjunction with each other.
2 moves upward while being guided by being sandwiched between the guide pieces 33, 33, and the state of FIG. 5 is obtained when the knob 19 is rotated clockwise by approximately 90 degrees. At this time, the lever handle shaft 12 moves the operating portion 3 of the locking piece 32 moved to the upper position.
The engagement with the first engagement groove 29 restricts its rotation. That is, in this position, even if an attempt is made to operate the lever handle 12, the lever handle 12 cannot be turned. Therefore, the operating member 18 of the latch 10 is held at the protruding position shown in FIG. 1, and the door 1 is locked in the closed state. You.

The door 1 can be returned from the locked state of FIG. 5 to the unlocked state of FIG. 4 by rotating the knob 19 approximately 90 degrees counterclockwise from the position of FIG. The operation of the locking interlocking mechanism at this time is opposite to the above and is self-evident.

In this embodiment, the knob 19 is provided rotatably, but is provided so as to be vertically movable.
The locking piece 32 may be directly connected to the locking piece 32, and the locking piece 32 may be directly moved up and down by the vertical movement of the knob. In this case, the cam 27 and the cam receiver 28 are unnecessary.

[0035]

According to the locking mechanism of the present invention, the shaft of the handle member is directly engaged with the engaging groove provided in the locking piece which moves up and down with the rotation of the locking operation member, so that the locking is ensured. Is made.

Further, since locking cannot be performed at a position where the shaft of the handle member is disengaged without being engaged with the engagement groove, a false locking state does not occur at an improper position, and a false locking state occurs in the prior art. This does not cause damage to the handle member.

Further, since the locking mechanism of the present invention has a simple structure and a small number of parts, it is hard to break down and can be provided at a low cost.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a locking mechanism according to an embodiment of the present invention.

FIG. 2 is an external view (right side) and an internal structure diagram (left side) when the locking mechanism of FIG. 1 is in an unlocked state.

FIG. 3 is an external view (right side) and an internal structure diagram (left side) when the locking mechanism of FIG. 1 is in a locked state.

FIG. 4 is an internal structural view showing a locking mechanism according to a different embodiment of the present invention in an unlocked state.

FIG. 5 is an internal structural view showing the locking mechanism of FIG. 4 in a locked state.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 door (fixed member) 2 mounting base 3 collar 10 latch (lock) 11 lever handle (handle member) 12 lever handle shaft 19 knob (locking operation member) 20 knob shaft 22 gear 23 rack 24 engagement groove 25 locking piece 26 Guide piece 27 Cam 28 Cam receiver 29 Engagement groove 30 Circular window 31 Working part 32 Locking piece 33 Guide piece

Claims (4)

[Claims] 1. A mounting pedestal mounted on a surface of a fixed member, a handle member rotatably provided on the mounting pedestal,
A lock which is housed inside the fixed member and opens and closes the fixed member with the rotation of the handle member, a locking operation member rotatably provided on the mounting base, and a lock operation member provided inside the mounting base. Locking interlocking means for interlocking with rotation of the locking operation member and preventing rotation of the handle member, wherein the locking interlocking means engages a shaft of the handle member. And a actuating means for moving the locking piece up and down in conjunction with the rotation of the locking operation member, and the handle member when the locking piece is at an upper position or a lower position. Wherein the shaft of the handle is engaged with the engagement groove to prevent the rotation of the handle member. 2. The apparatus according to claim 1, wherein said operating means includes a gear which rotates in conjunction with said locking operation member, and a rack provided on said locking piece and meshing with said gear. Locking mechanism. 3. The device according to claim 1, wherein the actuating means includes a cam that rotates in conjunction with the locking operation member, and a cam receiver provided on the locking piece and engaging with the cam. The locking mechanism according to claim 1. 4. The locking mechanism according to claim 2, wherein said operating means further comprises a guide piece for guiding a movement path of said lock piece.