JPH036773Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a so-called reversible latch lock in which the latch head retreats when the door is closed, like a normal latch lock, and when the door is opened, the latch head is reversed to unlock the door.

A conventional latch lock of this type is one described in Patent Application Publication No. 2880 of 1978, but this was invented mainly for the purpose of being used as an electric lock. The locking piece that prevents the latch head from reversing is configured to engage and disengage from the groove in the bulge on either the upper or lower side of the latch head, so when the lock is locked, the locking piece engages with the groove and the latch head is reversed. When the latch head is blocked, if a large force in the direction of opening the door, that is, lateral pressure, is applied to the latch head, it will oscillate with the locking piece as the fulcrum, causing the latch head to tilt within the lock case, causing the latch head to tilt when unlocking. There are inconveniences such as the king piece not operating smoothly, the locking piece coming off the latch head due to vibration even though the lock is not being unlocked, and the latch head not protruding smoothly. Ta.

However, in order to eliminate and solve the above-mentioned drawbacks, the present invention provides a pair of upper and lower locking pieces to prevent the latch head from reversing, thereby preventing the latch head from swinging laterally when the lock is locked, so that the locking pieces and the latch head can operate smoothly. The specific structure of the latch lock according to the present invention will be explained below with reference to the embodiments shown in the drawings.

That is, 1 has a substantially rhombic planar shape with one side of the front part having an inclined surface 2, and bulges 3, 3 are integrally projected symmetrically at the top and bottom of the rear part, and the bulges have a bulge in the front-rear direction. This is a latch head in which grooves 4, 4 are formed, and the rear _central part is cut out to form a receiving part ₁₁ of a slider ₉ , which will be described later. Similarly, in a case 10 made of synthetic resin, the distance between the top plate 10 ₂ and the bottom plate 10 ₃ is approximately equal to the height of the latch head, there is a rear plate 10 ₄ .
A case incorporating this latch mechanism is fitted so as to be freely retractable from a hole in the front plate ₁₀₅ by means of a compression spring 7 interposed between a slider 9 made of synthetic resin that abuts on the receiving part ₁₁ of the latch head 1. 10 is fitted into the lock case 5 so that the front part of the latch head 1 protrudes from the protrusion hole ₆₁ of the front plate 6. 8,8
are each composed of a horizontal piece 8 ₁ and a vertical piece 8 ₂
A pair of upper and lower locking pieces each having a letter-shaped shape are pivotably supported on the side plate 5 ₁ of the lock case 5 so as to be freely reversible, and the overlapping portions of the vertical pieces 8 ₂ and 8 ₂ are connected via a pin 12. , the locking pieces 8, 8 are configured so that even if the bent portion _82a of one of the vertical pieces ₈₂ is pushed in the horizontal direction, both locking pieces 8, 8 are symmetrically inverted, and the top plate 10 of the case 10 is normally ₂ , horizontal piece 8 ₁ from the hole drilled in the bottom plate 10 ₃ ,
The tip of the latch head ₈₁ is inserted into the case 10 and is biased by a spring 83 so as to fit into the grooves 4, 4 of the upper and lower bulges 3, ₃ of the latch head 1, respectively. Reference numerals 13 and 13 designate a pair of upper and lower crank plates each consisting of a horizontal piece 13 ₁ and a vertical piece 13 ₂ , which are rotatably pivoted to the side plates 5 ₁ in the same way as the locking pieces 8 and 8, and each horizontal The end of the piece 13 and the extension of the horizontal piece 8 ₁ of the locking piece 8 are connected via a pin 15 , and the overlapping portions of the vertical pieces 13 ₂ , 13 ₂ are connected via a pin 16 .
Reference numerals 17 and 17 refer to actuating plates that swing horizontally by operating handles attached to the inner and outer door surfaces, and the tips of the actuating plates are inserted into the lock case through long holes 5 ₂ and 5 ₂ bored in the lock case side plates 5 ₁ and 5 ₁ . The locking pieces 8 are inserted into the interior, and the bent portions 8 _2a of the locking piece 8 and the bent portions 13 _2a of the crank plate 13 are pushed forward or backward to engage the locking pieces 8, 8 with the grooves 4, 4 of the latch head 1. It has the effect of flipping it out of position.

Next, in accordance with the above structure of the present invention, the specific usage and effects of the latch tablet of the present invention will be explained with reference to the illustrated embodiments.

That is, when the door to which the latch lock and the handle for operating the latch lock are attached is closed, the latch head 1 constantly protrudes from the protruding hole 61 of the front plate 6 of the lock case 5 due to the restoring force of the spring 7 via the slider ₉ . strike on the door frame side (not shown)
The inclined surface 2 comes into contact with the curved part of the latch head 1, and due to the action of the inclined surface, the latch head 1 slides back inside the case 10 against the restoring force of the spring 7, and protrudes again at a place that matches the fitting hole of the strike. , fits into the fitting hole. In this state, even if the door is pushed in the opening direction, the latch head 1 will still fit the tips of the locking pieces 8, 8 into the grooves 4, 4 of the bulges 3, 3, and engage with the side walls of the grooves. , the door cannot be reversed, and the door is kept in a locked state.

When the handles attached to the inside and outside of the door are pushed or pulled in the door opening direction, the actuating plate 17 of the handle horizontally swings and bends the bending part _82a of the locking piece 8 or the crank plate 13. The bent portion 13 _2a will be pushed in the horizontal direction, but both bent portions 8 _2a and 13 _2a
Even if the locking pieces 8, 8 are pressed, the shaft 11,
11 as a fulcrum, the tips of the locking pieces 8, 8 are separated from the grooves 4, 4 of the latch head 1, and the force in the opening direction causes the ends of the fitting hole of the strike to be The locking surface ₁₂ engaged with the edge is pushed, and the latch head ₁ is reversed as shown by the two-dot chain line in FIG. Then, it slides back into the case 10, that is, the lock case 5, against the restoring force of the spring 7, and the engagement with the strike is released to unlock or open the door. When the door is opened and the latch head 1 is released from the strike, the latch head protrudes again due to the restoring force of the spring 7 and returns to the state shown by the solid line in FIG. When the handle is released, the locking pieces 8, 8 are reversed by the restoring force of the spring ₈₃ so that their tips approach each other, so that the tips fit into the grooves 4, 4 of the latch head 1 again. The state shown in FIG. 2 is restored.

After that, the above operation is repeated every time the door is opened and closed.

The series of reversing operations of the latch head described above is exactly the same as the "latch lock" described in the earlier Japanese Patent Publication No. 51-2880, but according to the latch lock according to the present invention, there is a lock that prevents the latch head from reversing. By providing a pair of upper and lower king pieces that can be reversed symmetrically at the same time, even if the latch head is subjected to force in the direction of opening the door, ie, lateral pressure, it is locked at two points, the upper and lower, so that the locked state is maintained. It is sturdy and has excellent security, and unlike conventional latch locks, there is no lateral vibration caused by the locking piece in one place, and the latch head tilts inside the lock case and the locking piece does not move when the lock is unlocked. The locking piece may not operate smoothly due to vibration, and the locking piece may become dislodged from the latch head and unlock unexpectedly even though the lock is not being unlocked, or the latch head may not protrude smoothly. This has solved the inconvenience of losing the lock, and it is possible to provide an extremely safe reversible latch lock that is less likely to malfunction.

In this embodiment, the latch lock according to the present invention is used as a handle lock, but if the locking piece is operated by a solenoid, it can be used as a highly safe electric lock. Of course, there are no limitations on the shape or operating method of the locking piece.

Furthermore, by using a sound-absorbing material such as synthetic resin for the case including the front plate that houses the latch head and its attached parts as in this embodiment, the latch head can be turned over and slid smoothly, and is wear-resistant. If this is mass-produced as a latch mechanism,
Since it can be easily installed by simply fitting it into the lock case, there is an advantage that even if there is an order for a non-standard lock case, the product can be manufactured in response to the order.

In addition, in this embodiment, bulges are formed above and below the latch head to regulate the amount of protrusion of the latch head, but if another mechanism for regulating the amount of protrusion of the latch head is provided, the bulges can be reduced. It's something you don't need.

[Brief explanation of the drawing]

The drawings illustrate the embodiment of the present invention, and FIG. 1 is a perspective view of the entire latch head used in the latch lock of the present invention, and FIG. 2 is a view of the latch head of the present invention as shown in FIG.
3 is a sectional view taken along line A, FIG. 3 is a sectional view taken along line B--B in FIG. 2, and FIG. 4 is a sectional view taken along line C--C in FIG. 1...Latch head, 2...Slope, 3...Bulge, 4...Groove, 5...Lock case, 6...Front plate,
7...Spring, 8...Lotsu King Peace.

Claims (1)

[Scope of utility model registration request] The latch head 1 has a substantially diamond-shaped planar shape with one side of the front part having an inclined surface 2, and has grooves 4, 4 in the front and rear direction formed in bulges 3, 3, which are integrally formed symmetrically in the upper and lower rear parts. The front part of the latch head is fitted through a spring 7 so that it can be retracted from a protruding hole ₆₁ bored in the front plate 6 of the lock case 5, and a horizontal piece 8 is inserted into the groove 4 of the bulge part. A pair of upper and lower L-shaped locking pieces ₈ , 8, in which parts of 1 and 8 ₁ fit together to prevent the latch head 1 from reversing, are connected to horizontal pieces 8 1 , ₈ .
The locking pieces ₈ , 11 are reversibly pivoted via springs ₈₃ , ₈₃ which urge a part of the locking pieces 81 to always fit into the grooves 4, 4.
When the vertical pieces 8 ₂ , 8 ₂ of 8 are pushed by either of the operating plates 17 , 17 of the horizontally swinging handle attached to the inside and outside of the door, a pair of locking pieces 8 ₂ are activated. A latch lock formed by connecting 8 and 8 with a pin 12 so that they can be reversed symmetrically at the same time.