JPH08170460A - Crime preventive lock for sliding door - Google Patents

Abstract

PURPOSE: To provide a crime preventive lock for sliding door excellent in crime preventiveness, allowing sliding doors to be fixed in the closed state and heightening airtightness. CONSTITUTION: The meeting stile 2 of an inner sliding door 1 is provided with a bar member 8 in the state of freely advancing/retreating in relation to an outer sliding door 7, and a guide hole 11 is formed at the lateral rail 9 of the outer sliding door 7. A claw 14 that can be engaged with the guide hole 11 is formed at the tip part of the bar member 8, and a slotted part 13 into which the claw 14 can be inserted is formed at the meeting stile 12 side end part of the guide hole 11. The bar member 8 is provided with a protruding part 15 positioned backward away from the claw 14 so as to press the inner sliding door 1 and the outer sliding door 7 in the fastening direction in association with pushing into the slotted part 13. Since the bar member 8 cannot come off the guide hole 11 unless the sliding doors 1, 7 are in the closed state, a lock cannot be unlocked from the outside, and the sliding doors 1, 7 can be fixed in the closed state by pushing the protruding part 15 into the slotted part 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a security lock for a sliding door.

[0002]

2. Description of the Related Art As a security lock for limiting the opening and closing amount of a sliding door,
The one described in Japanese Utility Model Publication No. 54-42878 is known. This security lock is provided with a rod-shaped member provided on a mating frame of an inner sliding door so as to be able to advance and retreat with respect to an outer sliding door, and a guide hole into which a tip portion of the rod-shaped member is inserted is formed in a horizontal rail of the outer sliding door. It is.

In the above security lock, when the leading end of the rod-shaped member is engaged with the guide hole, the opening / closing amount of the sliding door is limited to the range of the length of the guide hole.

[0004]

However, in the above security lock, the sliding door is opened to the extent that a hand or a tool can be inserted, and the rod-shaped member is pulled out from the guide hole, so that the sliding door is largely opened to enter the inside of the building. So you can
The security was not perfect.

[0005] Further, unless a crescent tablet or the like is used together,
The sliding door cannot be fixed in the closed state, and the airtightness in the closed state of the sliding door cannot be improved.

Accordingly, an object of the present invention is to provide a security lock for a sliding door which is excellent in security and can be fixed in a closed state of the sliding door, and is excellent in airtightness.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a bar-shaped member is provided on a mating frame of an inner sliding door so as to be able to advance and retreat with respect to an outer sliding door. A guide hole extending in the opening and closing direction of the sliding door is formed, a claw that can be engaged with the guide hole is provided at a tip end of the rod-shaped member, and a notch at one end of the guide hole into which the claw can be inserted when the sliding door is closed. Was formed.

Further, a bar-shaped member is provided on the sliding door, and the bar-shaped member can be moved forward and backward with respect to a wall surface parallel to the sliding door, and a guide hole extending in the opening and closing direction of the sliding door is formed in the wall surface, A claw that can be engaged with the guide hole is provided, and a notch portion into which the claw can be inserted in a closed state of the sliding door is formed at one end of the guide hole.

Further, a rod-shaped member is provided on the sliding door, and the rod-shaped member can be moved forward and backward with respect to the upper frame. A guide hole extending in the opening and closing direction of the sliding door is formed in the upper frame. And a notch which can be inserted in one end of the guide hole when the sliding door is in a closed state.

[0010] In addition, the bar-shaped member may be provided with a projection at a distance rearward from the claw to press the sliding door in the tightening direction in accordance with the pushing into the notch.

[0011]

When the bar-shaped member is advanced with the sliding door closed, and the claw at the tip of the bar-shaped member is inserted into the cut portion of the guide hole, the opening / closing amount of the sliding door is limited within the length of the guide hole.

In this state, even if the sliding door is slightly opened, a hand or an instrument is inserted from outside to release the lock, the lock cannot be released because the claw is engaged with the guide hole.

In the case where the bar-shaped member is provided with a protruding portion, when the bar-shaped member is further advanced from the above state with the sliding door closed, the protruding portion is pushed into the notch and one side of the protruding portion is cut. It comes into contact with one side surface of the insertion portion and is fixed in a state where the sliding door is closed, and the vertical frame closely adheres to the vertical frame, so that the airtightness is improved.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show a first embodiment. FIG.
As shown in FIG. 3, in the sliding sliding door, a holder 3 is attached to the fitting frame 2 of the sliding door 1 inside. The holder 3 includes a pedestal 4 and a cover 5, and an insertion hole 6 is formed between the pedestal 4 and the cover 5. A rod-shaped member 8 is provided in the insertion hole 6 so as to be able to advance and retreat with respect to the outer sliding door 7.

A plate 10 is attached to the horizontal rail 9 of the outer sliding door 7, and a guide hole 11 is formed in the plate 10 and the horizontal rail 9. A cut 13 is formed at the end of the guide hole 11 on the side of the mating frame 12. Note that the horizontal rail 9 is not limited to the lower rail, and may be an upper rail.

On the other hand, a claw 14 which can be inserted into the cutout 13 and whose vertical dimension is larger than the vertical width of the guide hole 11 is provided at the tip of the rod-shaped member 8. On one side of the rod-shaped member 8 is provided a protrusion 15 which is located rearward from the claw 14 and which presses the inner sliding door 1 and the outer sliding door 7 in the tightening direction when being pushed into the notch 13. ing. Inclined surfaces 16 and 17 are provided on one side surface of the protrusion 15 and the notch 13, respectively.

The cover 5 is provided with a recess 18 having one end open on the inner surface of the insertion hole 6, and the recess 18 has a ball 1 in it.
9 and a spring 20 for pressing the ball 19 downward are inserted. A hole 21 having a smaller diameter than the ball 19 is formed in the rod-shaped member 8. When the ball 19 is engaged with the hole 21, the claw 14 is moved to the guide hole 11.
The rod-shaped member 8 stands still at a position where it engages with. When the rod-shaped member 8 is moved from this stationary state, the ball 1 from the hole 21
A tapered surface 22 is formed at the opening edge of the hole 21 located on the upper surface side of the rod-shaped member 8 to facilitate the escape of the rod 9. A knob 23 is provided at the rear end of the rod-shaped member 8.

In order to limit the opening / closing amount of the sliding doors 1 and 7 by the security lock as described above, as shown in FIG. 4 (A), the knob 23 is pushed with the sliding doors 1 and 7 closed and the ball 19 is pushed. The rod-shaped member 8 is advanced to a position where the hole and the hole 21 are engaged, and the claw 14 is inserted into the cut portion 13 of the guide hole 11.

In this state, even if the sliding door is opened slightly, a hand or an instrument is inserted from outside to release the lock, the lock cannot be released because the claw 14 is engaged with the guide hole 11.

When the rod-shaped member 8 is further advanced from the above position with the sliding door closed, the projecting portion 15 is pushed into the cut portion 13 while the inclined surface 16 slides on the inclined surface 17, and accordingly, FIG. As shown in B), one side surface of the protruding portion 15 abuts one side surface of the notch portion 13, and each of the sliding doors 1 and 7 is fixed in a closed state. Adhesion to the frame increases airtightness.

If a crescent lock is provided in addition to the security lock, the locking frame 2 of the sliding door 1 on the inside and the locking frame 12 of the sliding door 7 on the outer side are attracted to each other at the time of locking, so that airtightness is maintained. Further improve.

In the case of a single sliding door or a sliding door, a rod-shaped member 8 is provided on the sliding door, and the rod-shaped member 8 can be moved forward and backward with respect to a wall surface parallel to the sliding door. A hole 11 is formed, and a notch 1 is formed at one end of the guide hole 11.
3 is formed.

A second embodiment is shown in FIGS. As illustrated, a cylindrical body 33 is fixed inside the vertical frame 32 of the sliding door 31, and a slide body 34 is provided inside the cylindrical body 33 so as to be vertically slidable. A lower end of a rod 35 is fixed to an upper part of the slide body 34. The rod-like member 35 projects upward from the cylindrical body 33 and is movable forward and backward with respect to the upper frame 36. A disc-shaped claw 37 is provided at the upper end of the rod-shaped member 35.

A plate 38 is attached to the upper frame 36, and a guide hole 39 extending in the opening and closing direction of the sliding door 31 is formed in the plate 38. The claw 37 can be engaged with the guide hole 39, and a notch 40 into which the claw 37 can be inserted when the sliding door 31 is closed is provided at one end of the guide hole 39. At one end of the plate 38, a tapered surface 41 is formed.

A base of a knob 42 is fixed to the slide body 34, and the tip of the knob 42 extends from a vertically extending elongated hole 43 formed in the cylindrical body 33 and the vertical frame 32 through the vertical frame 3.
2 project outside. When the knob 42 is slid up and down along the long hole 43, the rod-shaped member 3
5 slides. Inside the slide body 34, when the slide body 34 is located above a certain position, the slide body 3
A kick spring 44 is provided which presses the slide body 34 upward and presses the slide body 34 downward when the slide body 34 is positioned below the predetermined position. The vertical frame 32 is provided with a decorative seat 45 that covers the periphery of the long hole 43.

In the security lock of the second embodiment, the sliding door 31
When the knob 42 is slid upward in a state in which the bar is closed, the rod-shaped member 35 rises and the claw 37 moves the notch 4 of the guide hole 39.
Inserted at 0. The rod-shaped member 35 is held at that position by the action of the kick spring 44. In this state, the opening / closing amount of the sliding door 31 is limited to the range of the length of the guide hole 39, and even if the sliding door 31 is slightly opened, a hand is inserted from outside and the lock is released, the claw 37 remains in the guide hole 39. The lock cannot be released because it does not come off.

Further, since the plate 38 is provided with the tapered surface 41, the rod-shaped member 35 is erroneously projected from the sliding door 31 when the sliding door 31 is widely opened, and the sliding door 31 is closed. The leading end of the member 35 contacts the tapered surface 41, and the rod-shaped member 3
5 is pushed back inside the vertical frame 32. Therefore, the sliding door 31
It is possible to prevent the rod-shaped member 35 from being damaged without providing a trigger that allows the knob 42 to slide only in the closed state.

Further, since the security lock of the second embodiment is located above the sliding door, it is more difficult to find the locked portion when it is used for a sliding door at the entrance, as compared with the case where a door chain or the like is used. It has excellent properties. In addition, since only the knob 42 can be seen, the appearance is preferable.

FIGS. 9 and 10 show a third embodiment. In this embodiment, instead of the claw 37 of the second embodiment, a tongue piece 50 is provided at the tip of the rod-shaped member 35, and an inclined surface 51 is formed on one side of the cut portion 40 of the guide hole 39. The claw 52 is provided at the tip of the piece 50, the protrusion 53 is provided at a position separated downward from the claw 52, and an inclined surface 54 is formed above the protrusion 53. The claw 52 engages with the guide hole 39 in a state where the knob 42 is located at the center of the long hole 43, and the protrusion 53
With the knob 42 positioned above the long hole 43, the notch 40
Engage with.

In the third embodiment, when the knob 42 is slid to the center of the long hole 43 with the sliding door 31 closed, the claw 52 is inserted into the notch 40, and the opening and closing amount of the sliding door 31 is increased. It is limited within the range of the length of the guide hole 39.

When the knob 42 is further slid upward from the center of the elongated hole 43 with the sliding door 31 closed, the projecting portion 53 is pushed into the cut portion 40 while the inclined surface 54 slides on the inclined surface 51. Accordingly, one side surface of the protruding portion 53 comes into contact with one side surface of the notch portion 40, and the sliding door 31 is fixed in a closed state, and the vertical frame 32 closely adheres to the vertical frame, thereby increasing airtightness.

[0032]

As described above, according to the present invention, because of the above-mentioned structure, the rod-shaped member is advanced with the sliding door completely closed, and the claw at the tip of the rod-shaped member is engaged with the guide hole. With the opening and closing amount of the sliding door limited, even if you try to unlock the lock by opening the sliding door a little and inserting a hand or an instrument from the outside, the claw will not come out of the guide hole except the cut part, and unlock the lock. It is not possible. Therefore, the security is excellent.

In the case where the bar-shaped member is provided with a protruding portion, when the bar-shaped member is further advanced from the above state with the sliding door closed, the protruding portion is pushed into the notch and one side of the protruding portion is cut. It comes into contact with one side surface of the insertion portion and is fixed in a state where the sliding door is closed, and the vertical frame closely adheres to the vertical frame, so that the airtightness is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is an exploded perspective view of the above.

3A is a side view of the same as above, FIG. 3B is a rear view of the same as above, and FIG.

FIG. 4A is a plan view showing a state where the opening and closing amount of the sliding door is limited, and FIG. 4B is a plan view showing a state where the sliding door is closed and fixed.

FIG. 5 is an exploded perspective view of the second embodiment.

FIG. 6 is a partially cutaway front view showing the same usage state as above.

FIG. 7A is a vertical side view showing a state in which the sliding door is freely opened and closed, and FIG. 7B is a vertical side view showing a state in which the opening and closing amount of the sliding door is limited.

FIG. 8A is a partially longitudinal side view showing the lowered state of the slide body of the above, and FIG. 8B is a partially longitudinal side view showing the raised state of the slide body of the same.

FIG. 9 is a perspective view of a main part of a third embodiment.

10A is a partially cutaway front view showing a state where the opening and closing amount of the sliding door is limited, and FIG. 10B is a partially cutaway front view showing a state where the sliding door is closed and fixed.

[Explanation of symbols]

 1, 7, 31 Sliding door 2, 12 Summing frame 8, 35 Bar-shaped member 9 Horizontal rail 11, 39 Guide hole 13, 40 Notch 14, 37, 52 Claw 15, 53 Projection 36 Upper frame

Claims (4)

[Claims] 1. A bar-shaped member is provided on a mating frame of an inner sliding door so as to be able to advance and retreat with respect to an outer sliding door, and a guide hole extending in the opening and closing direction of the sliding door is formed in a horizontal rail of the outer sliding door. A security lock for a sliding door, wherein a claw that can be engaged with a guide hole is provided at a distal end portion, and a notch portion into which the claw can be inserted in a closed state of the sliding door is formed at one end of the guide hole. 2. A bar-shaped member is provided on a sliding door, and the bar-shaped member is capable of moving forward and backward with respect to a wall surface parallel to the sliding door. A guide hole extending in the opening and closing direction of the sliding door is formed in the wall surface, and A security lock for a sliding door, wherein a claw engageable with a guide hole is provided, and a notch portion into which the claw can be inserted in a closed state of the sliding door is formed at one end of the guide hole. 3. A sliding door is provided with a rod-shaped member, the rod-shaped member is allowed to move forward and backward with respect to an upper frame, a guide hole extending in the opening and closing direction of the sliding door is formed in the upper frame, and a guide hole is provided at the tip of the rod-shaped member. A security lock for a sliding door, in which a claw engageable with the claw is provided, and a notch portion into which the claw can be inserted is formed at one end of the guide hole when the sliding door is closed. 4. The bar-shaped member is provided with a protruding portion which presses the sliding door in a tightening direction in accordance with the pushing into the notch portion, at a distance rearward from the claw. The security lock for sliding doors described in.