JPH0768804B2 - Door lock - Google Patents

Description

TECHNICAL FIELD The present invention relates to a door lock applicable to both a lever handle and a ball.

(Prior Art) There are generally two types of door locks, a lever handle type that uses a strong spring and a grip ball type that uses a weak spring. These are selected according to the user's preference and the place where the door is installed. I chose to install it properly. For this reason, in this type of door lock, it is necessary to prepare two types according to each design, which is not only a nuisance for production and management of parts, but also once attached to the door. After that, if it becomes necessary to change the lever handle type to the ball grip type, it will be necessary to replace the lock itself and change the position of the notch hole provided in the door Had.

In order to solve such a problem, a proposal for a lock body that can be used as both a lever handle and a ball is also made in Japanese Utility Model Laid-Open No. 1-82260 and Japanese Utility Model Laid-Open No. 1-114762. This type is a type that has a lever handle cam with a strong spring acting and a grip ball cam with a weak spring acting inside the case, so the lock body is inevitable. In addition to being complicated and large, it has the inconvenience that it is difficult to dispose a lock mechanism.Furthermore, when changing from a lever handle to a ball clasp after mounting on the door, There is also a problem in that the work of removing the lock body and replacing it with the lock body must be performed.

(Problems to be Solved by the Invention) The present invention has been made in view of such a problem, and an object of the present invention is to provide either a lever handle type or a grip ball type by only slightly operating the lock body. It is to provide a door lock with a simple structure that can be applied to.

(Means for Solving the Problems) That is, according to the present invention, as a door lock for attaining the above-mentioned problems, a latch retractable cam that can be coupled with either a lever handle or a grip ball is provided with a swinging motion of the grip ball. A protrusion that suppresses reverse rotation is formed on a part of the peripheral surface by applying a return spring force that is suitable for the rotation of the lever handle at the position where a part of the protrusion contacts the protrusion. A pusher for exerting a spring force having a strength suitable for movement is operably arranged so as to be positioned outside and inside the rotation area of the cam.

(Operation) With this configuration, the lock body can be applied to both the lever handle type and the ball grip type by the operation of only positioning the pusher inside or outside the rotation region of the cam. You can In addition, when a protrusion provided on a part of the peripheral surface of the cam that suppresses reverse rotation is brought into contact with a pusher located in the rotation area of the cam, a strong spring force suitable for this is attached when the lever handle is attached. It is possible to suppress the reverse rotation at the same time as the action.

(Example) Then, the Example illustrated below is described.

1 to 4 show an embodiment of the present invention.
FIG. 1 shows the state when the lever handle is attached, FIG. 2 shows the state when the ball is attached, and FIG. 3 shows the locked state.

In the case body, which is indicated by reference numeral 1 in the drawing, in the substantially central portion thereof,
A spring bearing seat 3 is provided, and a latch bolt 6 urged by a weak spring 4 so that the latch portion 6a always projects from a hole 2a formed in the front plate 2 is slidable in a horizontal direction. Installed.

As shown in FIG. 4, an operation piece 8 having a contact surface 8a for contacting a claw portion 12b of a cam 12 described later is attached to the latch bolt 6 as shown in FIG. A connecting piece 9 is slidably attached to a portion near the tip of the latch bolt 6 so as to be sandwiched therebetween.
The respective tips of the abutting contact the both ends of a turning lever 10 pivotally attached to the case body 1, and when the cam 12 is turned clockwise in the drawing, the operation piece 8 pressed by the cam 12 is directly latched. Bolt 6
When the cam 12 is rotated in the counterclockwise direction in the drawing, the connecting piece 9 pressed by the cam 12 causes the rotating lever 10 to rotate in the clockwise direction in the drawing and hits the other end. Operation piece 8 that touched
The latch bolt 6 is configured to be retracted via the.

On the other hand, the above-mentioned cam 12 is arranged on one side of the latch bolt 6 so as to always maintain the neutral position by the return spring 13 having the strength suitable for the rotation of the ball.

This cam 12 is provided with a square hole 12a for receiving these square shafts in its center so that it can be rotated by a lever handle or a ball (not shown).
A claw portion 12b that abuts on each of the abutting surfaces 8a and 9a of the operation piece 8 and the connecting piece 9 described above is provided, and the claw portion 12b sandwiches the square hole 12a.
A contact surface 12c that comes into contact with a pusher 15 to be described later and a protrusion 12d for preventing reverse rotation that comes into contact with the side surface of the pusher 15 are provided on the peripheral portion on the opposite side to the opposite side. An engagement step portion 12e that engages with the locking portion 23a of the lock member 23 is provided at the edge portion.

By the way, the above-mentioned pusher 15 functions to exert a strong spring force on the cam 12 when the lever handle is attached,
Normally, a strong coil spring 16 is interposed between the front plate and the front plate to bias the cam 12 in one direction to prevent the cam 12 from rotating in the opposite direction.
Is slidably disposed between the side plate 1a of the case body 1 and the guide plate 17 so that the tip of the cam 12 contacts the contact surface 12c of the cam 12. In addition, this pusher 15 has a screw hole at its axis.
15a is provided so that when a handball is attached, it is drawn to a position where it does not come into contact with the cam 12 by a screw rod 18 inserted through a hole 2b provided in the front plate 2.

Reference numeral 20 is an L-shaped lock lever arranged on the opposite side of the cam 12 with the latch bolt 6 interposed therebetween.
Is always rotated counterclockwise in the figure by the coil spring 22 interposed between the lock spring receiver 21 on the case body 1 and when it is rotated clockwise by the key not shown. As shown in FIG. 3, the coil spring 22 displaced beyond the fulcrum position receives a clockwise urging force to displace the lock member 23 by the tip of the arm 20a. The lock member 23 displaces the inside of the case main body 1 to a position facing the latch bolt 6 to suppress the backward movement of the latch bolt 6 to maintain the door in the closed state. A locking portion 23a that engages with the portion 12b to prevent rotation of the cam 12 is provided, and an abutting edge 20b that abuts on the tip of the latch bolt 6 and suppresses its backward movement is provided inside thereof. ing.

In the figure, reference numeral 1b is a long hole for guiding the protruding portion 15b provided on the presser 15 to restrict the protruding position and the retracted position of the presser 15,
Reference numeral 25 denotes a cover plate that covers the front surface of the front plate 2.

In order to attach the lever handle to the door lock constructed as described above, the cover plate 25 is first removed, and the screw rod 18 screwed with the pressing member 15 is removed from the entire front plate 2. As a result, as shown in FIG. 1, the pusher 15 receives the strong pressing force of the coil spring 16 and projects to the front end position of the elongated hole 1b provided in the case body 1, and hits the cam 12 occupying the neutral position. Interface 12
touch c. Therefore, in this state, the square hole 12a of the cam 12 is
When the lever handle fitted to is pulled down, the force of the weak spring 13 wound around the cam 12 and the force of the strong coil spring 16 applied to the lever handle by the rotation of the cam 12 in the direction of the arrow are applied to the lever handle. Works. When the cam 12 rotates in this direction, the operation piece 8 moves to the right in the figure and latches.
6a is pulled in from the front surface of the front plate 2.

Further, when a reverse force is applied to the lever handle at the neutral position, the reverse rotation suppressing projection 12d protruding from one side of the cam 12 comes into contact with one side of the pressing element 15 to cause the lever to move. Reverse rotation of the handle is suppressed.

On the other hand, when attaching a ball to the door lock, the screw rod 18 is inserted into the hole 2b provided in the front plate 2 and the tip of the screw rod 18 is screwed into the screw hole 15a of the presser 15 to form the long hole. The pusher 15 is pulled back until it reaches the rear end of 1b.

As a result, as shown in FIG. 2, the pusher 15 is out of the rotation area of the cam 12, and only a weak force of the spring 13 acts on the cam 12, so that the rotation by the grasping ball can be performed easily. Therefore, if you rotate the handball clockwise in the figure, the cam 12
The latch 6a can be retracted by directly moving the operation piece 8 to the right by the claw portion 12b of the same, and when it is rotated counterclockwise in the figure, the rotation lever 10 is rotated clockwise through the connecting piece 9. Similarly, the operation piece 8 can be moved to the right at the tip thereof and the latch 6a can be retracted in the same manner.

In order to lock the latch bolt 6, the L-shaped lock lever 20 is rotated clockwise in the figure with a key not shown. As a result, the arm 20a end of the lock lever 20 displaces the lock member 23 downward as shown in FIG. 3, and the locking portion 23a at the tip is engaged with the engaging stepped portion 12e of the cam 12 to cause the cam 12 to move. Is prevented, and the contact edge 20b is opposed to the tip of the latch bolt 6 to suppress the backward movement thereof.

FIGS. 5 and 6 show a second embodiment of the present invention, which is based on a door lock for a lever handle, whereas this embodiment is for a ball grip. It is based on the door lock of.

Reference numeral 38 in the drawing denotes a frame body that slidably supports the latch bolt 36 in a state in which the weak coil spring 34 always urges the latch bolt 36 in the projecting direction, and the frame body 38 is provided between the rear wall 31c of the case body 31. The case body is biased by the inserted springs 39, 39
It is arranged in 31.

Reference numeral 42 is a cam having a lever handle or a square hole for receiving the square shaft of a ball in the center, and is arranged on one side of the latch bolt 36 so that a weak return spring 43 always keeps the neutral position.

On both sides of the peripheral edge of the cam 42, the two contact surfaces 38a and 38b provided on the frame 38 are contacted to press the frame 38 toward the rear wall 31c.
Two protrusions 42a and 42b are formed, and in a part of the peripheral edge thereof, a protrusion 42c for abutting against the side surface of the presser 45 at the neutral position is formed for suppressing reverse rotation.

45 is a strong coil spring 46 and one projection 42b of the cam 42
The pusher 45 is provided with a screw hole 45a at the axial center thereof, and the screw rod 48 inserted through the hole 32b of the front plate 32 can be used to pull the cam 42 out of the rotating region. It is configured to be able to. Note that reference numeral 31b in the drawing denotes a long hole that restricts the protruding position and the pulling back position of the pressing element 45 via the protruding portion 45b.

In this embodiment, when the lever handle is attached to the lock body, the push rod 45 is unpulled by the screw rod 48, and each tension of the weak spring 43 and the strong coil spring 46 suitable for the lever handle is applied to the cam 42. The protrusion 42c for acting and restraining the reverse rotation is brought into contact with the side surface of the pressing element 45 to suppress the reverse rotation of the lever handle.

In addition, when attaching a ball grip to the lock body, a screw rod 48 is screwed onto the pressing element 15 to pull it out of the rotation region of the cam 42, and only the force of the weak spring 43 suitable for the ball grip is applied. It makes the cam 42 act on the cam 42 and allows the handball to rotate right and left.

(Effect) As described above, according to the present invention, a spring having a strength suitable for the rotation of the lever handle is applied to the pressing element that can be moved into and out of the rotation area of the cam. The cam, which has a spring with a strength suitable for turning the handball, is provided with an abutting surface that abuts the pressing surface of the presser and a reverse rotation suppressing portion that abuts one side of the presser. Therefore, the spring force suitable for the lever handle and the spring force suitable for the grasping ball are applied to the latch pull-in cam simply by displacing the pusher inside or outside the rotation region of the cam. Not only is it possible to move the presser element into the cam rotation area, that is, in a state where the spring force for the lever handle is applied to the cam, one side of the presser element is It is possible to use this kind of mechanism as a reverse rotation prevention surface. It can be constructed more simply with fewer parts.

[Brief description of drawings]

FIGS. 1 and 2 are configuration diagrams of a door lock showing an embodiment of the present invention shown with a lever handle attached and a ball grip attached, FIG. 3 showing a locked state, and FIG. Is a perspective view showing a mechanism for retracting the latch bolt 6, and FIGS. 5 and 6 are views showing another embodiment of the present invention shown in a state when a lever handle is attached and when a ball is attached. 1 …… Case body, 6 …… Latch bolt 8 …… Operating piece, 9 …… Communication piece 10 …… Rotating lever, 12 …… Cam 15 …… Pressing element, 18 …… Screw rod 20 …… Lock lever, 23 …… Lock member 36 …… Latch bolt, 38 …… Support frame 42 …… Cam, 45 …… Presser 48 …… Screw rod

Claims (1)

[Claims] 1. A door lock equipped with a cam for latching and retracting, which is connected to either a lever handle or a ball, and a pusher movable from the front plate side of the door lock is used to rotate the cam. Displaceable within the region and outside the rotation region, a spring having a strength suitable for the rotation of the handle acts on the pusher, while the strength suitable for the rotation of the grip ball is applied to the cam. Of the cam, and a part of the cam is provided with an abutting surface that abuts a pressing surface of the presser and a reverse rotation suppressing portion that abuts a side surface of the presser. Door lock.