JP3231409B2 - Latch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch device used for doors, doors and the like of various facilities such as a general house and a company.

[0002]

2. Description of the Related Art Generally, a door is provided with a blanking device called a latch so that the door is not opened by wind or the like. In this latch device, a wedge-shaped latch head is retracted by operating a gripping ball, a lever handle, and the like, so that the door can be opened and closed. Then, the opening and closing direction of the door is determined by the inclination direction of the latch head.

[0003]

However, the above-described conventional latch device has a structure which must be constructed in consideration of the direction of the latch depending on the opening / closing direction of the door. This was annoying and nervous for those performing the construction work. Further, in the conventional latch device, it was impossible to selectively engage one door with strikes provided on two pillars to close the door.

SUMMARY OF THE INVENTION An object of the present invention is to provide a latch device which can be constructed without considering the direction of a latch when installing a door, in view of the above-mentioned conventional disadvantages.

[0005]

SUMMARY OF THE INVENTION A latch device according to the present invention is provided with a latch head having a locking projection disposed so as to be able to protrude and retract from an opening of a casing, and a latch head holder for rotatably supporting the latch head. And a support post that inserts and holds the latch head holder and the latch head, and that is fitted with a locking claw, is slidable up and down with respect to the casing, and is urged and arranged in a direction to be pushed down. A fan-shaped cam rotatably supported by an arm provided on the support column to hold the locking projection in an engaged state or a disengaged state with the locking claw; and pull up the support column. A moving member is provided, and a direction position of the latch head is determined by changing an engagement position between the locking protrusion and the locking claw .

[0006]

According to the latch device of the present invention, the direction of the latch is determined when the door that has been opened is closed, so that the installer can construct the door without considering the direction of the latch. Thus, the work efficiency can be improved.

[0007]

An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 6 are configuration diagrams showing an operation state of the latch device according to the present invention, and FIGS. 7 to 16 are component parts used in the latch device according to the present invention.

[0008] The latch device according to the present invention includes a casing 1
A latch head 11 disposed so as to be able to protrude from an opening 10a formed in the latch head 11, a latch head holder 12 for supporting the latch head 11, a support column 13 for slidably inserting and holding the latch head, A first spring for urging the latch head holder, a sector cam, and a moving member;
, A second spring 17 for urging the latch head and the latch head holder, a third spring 18 for urging the moving member, and the like.

Here, as shown in FIGS. 7 to 9, the latch head 11 is composed of a substantially tapered tip portion 11a, a shaft hole 11b supported by the latch head holder 12, and a locking projection 11c. , And is rotatably supported in the direction of arrow A about the shaft hole 11b. The latch head holder 12
The shaft hole 12a and the second spring 17 have a substantially U-shaped cross section.
Is formed to hold the projections 12b.
reference).

The moving member 16 has a rectangular frame shape, and has an opening 16a for locking an operating piece such as a thumb latch or push-pull, which is a door operating member (see FIG. 12). . Further, an engaging piece 16b for engaging the head of the support column 13 and a recess 1 for accommodating the sector cam 15 are provided.
6c is formed. FIG. 13 is a plan view showing a locking claw 19 fixed to the support column 13, wherein a shaft hole 19 a into which the support column 13 is fitted and a locking projection 11 c of the latch head 11.
Are selectively locked.

FIGS. 14 and 15 are a front view and a plan view, respectively, showing the fan-shaped cam 15, and show a pair of cam bodies 22 formed in a fan shape.
And a shaft 23 that rotatably supports this. FIG. 16 is a front view showing the support column 13. Here, the support column 13 has an arm 24 erected substantially at the center, and the sector cam 15 is rotatably supported by the arm 24 on the arm 24. Further, a flange 13a for locking the first spring 14 is formed at the lower end. Furthermore,
At the upper end of the support column 13, a head 13b is formed,
It engages with the engagement piece 16b of the moving member 16.

Next, the operation of the above-configured latch device will be described. First, the door is closed,
When the latch head 11 protrudes into a strike (not shown), each component is located as shown in FIG. In this state, the operation of the sector cam 15 causes the latch head 1 to move.
1 cannot retreat and the door does not open. When the user operates a door latch such as a thumb latch to open the door, an operation piece (not shown) inserted into the opening 16a pushes up the moving member 16 in the direction of arrow A. Then, the engagement piece 16b is
The support column 13 is pulled up by engaging the head 13b of the third (see FIG. 2).

At this time, the engagement between the locking claw 19 and the locking projection 11c is released, and the latch head 11 can freely rotate about the shaft hole 11b. When you open the door in this state,
The latch head 11 contacts the end of the strike, and the arrow B
Retreat in the direction. At this time, the lower end bent portion 16d of the moving member 16 abuts on the X point of the sector cam 15, and the sector cam 15
Is rotated about the shaft body 23 in the direction of arrow C. When the sector cam 15 rotates, as shown in FIG.
Keeps the support column 13 pulled up with respect to the latch head holder 12. Accordingly, the engagement between the locking claw 19 and the locking protrusion 11c is released, and the latch head 11 is freely rotated.

When the latch head 11 is disengaged from the strike end, the second spring 17 causes the latch head 11 to protrude, as shown in FIG. Then, fan cam 1
5 moves toward the opening 10a, so that the moving member 16
3 is moved downward by being urged by the spring 18 of FIG.
Return to However, the support column 13 is a counterclockwise
Is held in the raised position by the
You. Thus, the locking projection 11c and the locking claws 19 in this state
Because the engagement is released, the latch head 11 is left free to rotate. For this reason, the door can be closed in either direction. At this time, after the direction of the latch head 11 is determined, when the latch cam 11 is pushed in the direction of arrow C, the sector cam 15 is pushed at the Y point by the bent portion 16d, and the shaft 23
Is rotated in the direction of arrow E around the center, and is stored in the recess above the bent portion 16d at the lower end of the moving member 16 as shown in FIG. In this state, the latch head 11 is again opened.
a , the engagement between the locking claw 19 and the locking projection 11c by the sector cam 15 is released, as shown in FIG.
From the state, and the direction of the latch head 11 is determined.

As described above, the latch device of the present invention can freely change the direction of the latch depending on the direction in which the door is closed. Further, in the above embodiment, the driving device of the moving member 16 is omitted, but the moving member 16 can be driven using a thumb turn, a lever handle or the like. Further, another device may be provided.

[0016]

As described in detail above, the latch device according to the present invention is provided with a latch head having a locking projection disposed so as to be able to protrude and retract from the opening of the casing, and rotatably supports the latch head. A latch head holder, and a latch claw for inserting and holding the latch head holder and the latch head and attaching a locking claw, are slidable up and down with respect to the casing, and are urged in a direction to be pushed down to be disposed.
The support column and, the arms provided on the support column is rotatably supported engagement or engagement with the locking claws of the locking projection
A sector cam for holding the released state, and a moving member pulling the support column, to determine the direction the position of the latch head by changing the position of engagement between the engagement claw and the locking projection, When installing the door, it is not necessary to consider the direction, and the workability is excellent. In addition, one door can be selectively engaged with strikes provided on two columns, respectively, to close the door.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a latch device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a case where a moving member of the latch device is raised.

FIG. 3 is a configuration diagram illustrating a state in which a latch head of the latch device is retracted.

FIG. 4 is a configuration diagram showing a state in which a latch head of the latch device protrudes.

FIG. 5 is a configuration diagram showing a state in which the latch head of the latch device has retreated again.

FIG. 6 is a configuration diagram showing a state where a latch head of the latch device protrudes into a strike and a direction is determined.

FIG. 7 is a sectional view of a main part showing a relationship between a latch head and a locking claw used in an embodiment of the present invention.

FIG. 8 is a vertical sectional view of the latch head.

FIG. 9 is a plan view of the latch head.

FIG. 10 is a side view of a latch head holder used in the latch device of the present invention.

FIG. 11 is a plan view of the latch head holder.

FIG. 12 is a front view of the moving member.

FIG. 13 is a plan view of the locking claw.

FIG. 14 is a front view of the sector cam.

FIG. 15 is a plan view of the sector cam.

FIG. 16 is a front view of the support column.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Casing 10a Opening 11 Latch head 11a Tip 11b Shaft hole 11c Locking projection 12 Latch head holder 13 Support pillar 13a Flange 13b Head 14 First spring 15 Fan-shaped cam 16 Moving member 16a Opening 16b Engagement piece 16c recess Place 16d Bending part 17 Second spring 18 Third spring 19 Engagement claw 19a Shaft hole 20, 21 Recess 22 Cam body 23 Shaft body 24 Arm

Claims (1)

(57) [Claims] 1. A latch head having a locking projection disposed so as to be able to protrude and retract from an opening of a casing, a latch head holder rotatably supporting the latch head, and inserting the latch head holder and the latch head. The holding claws are attached to the casing so as to be slidable up and down with respect to the casing, and urged in a direction to be pushed down to be disposed.
Support pillars and, engagement or Kakarigokai with a rotatably supported on the arm provided in the supporting column wherein the locking projection the locking claw
A sector cam for holding the divided state, said pull the support column and a moving member, determines the direction the position of the latch head by changing the position of engagement between the engagement claw and the locking projection A latch device characterized by the following.