JPH0249330Y2 - - Google Patents

Description

[Detailed description of the invention] This invention enables the door to be pulled in and pulled out with a smooth lever operation, while also eliminating the need for the operating part to protrude into the room, which would be a hindrance to installing interior shoji screens, etc. The present invention relates to a locking device for sliding doors that prevents such accidents.

A conventional locking device of this type is the so-called crescent lock, in which the crescent sickle spends most of its rotation angle in idle rotation until it reaches the corresponding receiving metal fitting, and then rotates after engaging the receiving metal fitting. The angle is small;
Furthermore, since the frictional resistance with the receiving metal fitting is large, a large amount of force is required to operate the lever, but the pulling and pulling action is weak.

In order to eliminate this drawback, a plug integrated with a lever is pushed into the casing attached to the side end face of the inner door, and by rotating it 180 degrees, the door can be strongly pulled in and pulled out. A locking device was devised and published in 1983-32531.
This is publicly known as described in the publication, but since the plug, which is the operation part, is configured to slide in a direction perpendicular to the running direction of the door, the rear end of the plug, i.e. Under normal conditions, the lever will protrude further into the room than the inside door,
It has the disadvantage that it becomes an obstacle to walking near the door, and it becomes a hindrance to installing internal shoji screens, etc.

However, in order to eliminate and solve the above-mentioned drawbacks, the present invention has a casing fixed to the side end of the inner door, and a plug with a lever integrally fixed to one end is slidable back and forth and pushed into the casing. At that time, the plug is inserted so that it can be rotated at a certain angle, and when the plug slides in the backward direction, it rotates and protrudes in a direction perpendicular to the sliding direction of the plug, and is attached to the receiving bracket attached to the outer door. It is characterized by a structure in which an engaging locking lever is provided, and the plug is configured to further slide in the backward direction as the plug rotates. The specific configuration of the device will be explained.

That is, 1 is a casing that is installed inside a vertical stile A' at the side end of the inner door A, the front end of which is cylindrical, and a plug 2 integrated with a lever 2 ₁ is inserted into this circular hole 1 ₁ . The spring 2 3 is fitted into a pin hole 2 ₂ drilled in the rear end _of the plug 2 in the axial direction. A pin _{24 is inserted into the pin 24} , which is forced to protrude outward. This pin ₂₄ normally fits into a groove ₁₂ formed in the front-rear direction along the circular hole ₁₁ , allowing the plug 2 to slide in the front-rear direction, but not rotating. It's becoming like that. The rear end of the circular hole ₁₁ is cut out in a substantially semicircular shape with a large diameter so as to form a step ₁₃ into which the pin ₂₂ falls when the plug 2 is pushed in. The stepped portion ₁₃ is tapered so that it becomes shallower in the front-rear direction during half a turn. Reference numeral 4 denotes a rack having a U _- shaped cross section and having rack teeth _{4 1} . The plug 2 is connected so that the rotational force of the plug 2 is not transmitted to the rear end surface, and the front end of the rack 4 comes into contact with the edge of the circular hole ₁₁ , so that the plug 2 does not fall out. 6 is the rack tooth of rack 4 4 ₁ ... 4 ₁
A locking rod integrally formed with teeth 6 ₁ ... 6 ₁ that mesh with the
It is pivotally supported on the side plate of the casing by a shaft ₆₂ so as to rotate and protrude outside the casing when the rack 4 slides. Reference numeral 7 designates a receiving metal fitting with which the sickle portion ₆₃ at the tip engages when the locking rod 6 rotates and protrudes;
attached to the interior surface of stile B'.

Next, in accordance with the above-mentioned structure of the present invention, the specific usage and effects of the locking device of the present invention will be explained with reference to the illustrated embodiments.

That is, when the inner and outer doors A and B are closed in a sliding manner, and the plug 2 is pushed in the direction of the arrow,
The pin ₂₄ retreats against the restoring force of the spring 3 while being guided by the groove ₁₂ , and the rack 4 is also pushed back by the plug 2, so that the locking rod 6 that meshes with the rack teeth ₄₁ ... ₄₁ A rotational force is applied to the teeth 6 ₁ . . . 6 ₁ , and the locking rod 6 rotates and projects as shown by the two-dot chain line using the shaft 6 ₂ as a fulcrum. At this time, the pin ₂₄ falls into the step ₁₃ of the large diameter portion on the rear end side of the circular hole ₁₁ and is released from the restraint by the groove ₁₂ , so that the plug 2 is in a rotatable state. . In this state, pull the lever 2 ₁ that is integrated with the plug 2 that is standing vertically towards you and rotate it 180 degrees, the plug 2 will rotate and the pin 2 ₄
However, the step 1 ₃ turns in one piece while contacting the stepped portion 1 3 , but since the stepped portion 1 ₃ is tapered shallowly during half-turn, the action of this taper causes a spiral movement and moves in the backward direction. So this pin 2
₄ , the plug 2 and rack 4 are also moved backward, causing the locking rod 6 to rotate further than the state indicated by the two-dot chain line _. When engaged as shown by the broken line in the figure, the arc movement of the locking lever 6 exerts a force to push the door further toward the door, thereby producing a pulling and drawing action of the door.

To unlock, rotate the lever 2 ₁ in the opposite direction to return it to the state shown by the two-dot chain line in Figure 2. When you release your hand from the lever 2 ₁ , the plug 2 protrudes due to the restoring force of the spring 3 and returns to the solid line state, that is, the unlocked state. However, when the plug 2 is restored, a taper is formed at the step where the pin 2 ₄ falls, as shown in the figure, so that the pin 2 ₄ engaged with the step 1 ₃ can get over this step. It is necessary to hold the pin 24 or form a taper in the pin ₂₄ .

As described above, according to the locking device for a sliding door according to the present invention, a plug having a lever integrally fixed to one end is slidable back and forth within the casing fixed to the side end of the inner door, and the plug is attached to the casing. The plug is inserted so that it can be rotated by a certain angle when pushed inside, and when the plug slides in the backward direction, it rotates and protrudes in a direction perpendicular to the sliding direction of the plug, and is attached to the outside door. A locking lever that engages with the receiving fitting is provided, and the plug is configured to further slide in the backward direction as the plug is rotated, and the turning lever is brought close to the receiving fitting by pushing the plug, The locking rod is engaged with the bracket by turning the plug when the lever is operated, and the door is pulled in and drawn out. Therefore, the door can be pulled in and drawn out powerfully with smooth lever operation. In addition, the operating parts such as levers and plugs are located on the running direction side of the door, just like the crescent lock, and there is nothing protruding on the indoor side, so they may become an obstacle for people walking near the door or cause problems inside the door. It does not cause any trouble when installing the shoji, and it is excellent not only in its locking function but also in its structure, and has great practical effects.

In addition, since the locking mechanism and the receiving bracket can be housed in the joining part of the inner and outer doors, that is, within the vertical stile,
It has the advantage of being excellent in terms of appearance and security.

[Brief explanation of the drawing]

The drawings illustrate the embodiment of the present invention, and FIG. 1 is a cross-sectional plan view of the device attached to a door, FIG. 2 is a vertical cross-sectional side view of the device, and FIG. FIG. 1...Casing, 2...Plug, 2...Lever, 3...Spring, 4...Rack, 5...Screw, 6...Turnable lever, 7...Bracket.

Claims (1)

[Scope of utility model registration request] A plug with a lever integrally fixed to one end is inserted into a casing fixed to the side end of the inner door so that it can be slid back and forth and rotated by a certain angle when pushed into the casing. ,
When the plug slides in the backward direction, a locking lever is provided that rotates and protrudes in a direction perpendicular to the sliding direction of the plug and engages with a receiving bracket attached to the outer door. A locking device for a sliding door configured to further slide in a backward direction.