JPS5829238Y2 - Totsupratsuchi - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a top latch used to lock a door frame into which casement glass or the like is fitted.

Conventional top latches have a relatively complex structure, have a high failure rate, and are not smooth to operate.
Moreover, the price was relatively high.

This invention was made to eliminate these drawbacks, and was designed to reduce manufacturing costs by simplifying the structure as much as possible and making assembly easier, as well as by using synthetic resin at key points to facilitate operation. It is intended to provide a top latch.

The drawings showing one embodiment of the present invention will be described below.

1 is a steel plate that extends near the front end 1' of both side plates 2, 2, bends outward at right angles, and is provided with mounting feet 5, 5 with screw holes 4.4 drilled near the center of each. It is a gutter-shaped outer casing made of.

Mounting legs 5 are provided on both side plates 2, 2 of the outer casing 1 below the front end 1'.
, 5, and fitting locking portions 6, 6 having parallel notches on the lower ends of both side plates 2, 2 near the rear end 1″, and below the same horizontal plane as the fitting locking portions 6, 6 near the bottom of the rear end 1″. A pin for locking the rod 11 on the side of the mounting legs 5, 5 of the locking portions 7, 7 is provided with a locking portion 7°7 provided by forming a recess parallel to the lower end of the side plates 2.2. Through holes 9, 9 are provided through which the holes 8 are inserted.

Further, in the upper plate 3 of the outer casing 1, a rod 11 is bored in the middle of the upper plate 3 near the rear end 1'' so that it can freely rotate back and forth using a pin hole 12 inserted and locked by a pin 8 as a fulcrum. The provided legs 13
An insertion hole 10 is provided.

The rod 11 is made of a steel plate or the like and has an annular grip portion 14 at the tip of the leg portion 13 on the opposite side of the pin hole 12.

Reference numeral 15 denotes a cover plate made of a steel plate or the like, which is parallel to the upper plate 3 and has an area that can be inserted into the outer case 1, and is fitted near the front end to completely cover the opening opening below. At this time, the step part 16 is provided to be fitted and locked in the fitting locking parts 6, 6, and the stop part 17 of the spring 20 is cut out and bent upward into a U-shape in the center. and an insertion port 18 that is bored at a position on the lower surface of the insertion hole 10 with the same area as the insertion hole 10 when it is inserted into the outer casing 1 and completely covers the open opening.
An escape recess 19 is provided near the center of the pin 8 to avoid contact with the pin 8.

21 is the outer casing 1 inside the cover plate 15 whose front end 21' is at an acute angle.
A gutter-like latch made of a steel plate or the like that is slidably fitted into the relief recess 1 of the cover plate 15 at the lower end of both side plates 22 and 22.
Notch 23.
23, the leg portion 13 of the rod 11 is inserted closer to the rear end 21'' than the center of the upper surface 24, so that when the rod 11 rotates back and forth, the latch 21 is slid back and forth through the leg portion 13. A latch 21 is provided with a sliding hole 25 formed therein, and a latch 21 that is molded so as to cover the inner wall of the upper surface 24 with a synthetic resin such as polyamide and to cover the openings of the front end 21' and the rear end 21'. It is provided with a spring 20 that always presses outward and a spring chamber 26 into which the stop portion 17 of the spring 20 is fitted.

The latch 21 has a plurality of fitting holes 27 at the corners and a top surface 24.
A fixed plate 28 is cut out inside and bent at right angles.
is provided to increase the adhesive strength of the synthetic resin to the latch 21.

Further, a fitting portion 29 formed of synthetic resin at the front end 21' has a curved surface so that it can be easily fitted into a mating fastener.

Furthermore, the fixing plate 28 serves to hold the spring 20 even if the synthetic resin runs out due to heat or the like.

A method of assembling the top latch having the above configuration will be described below.

First, the spring 20 is attached to the stopper 17 of the cover plate 15, and after the spring 20 and the stopper 17 are fitted into the spring chamber 26 of the latch 21, the cover plate 15 is attached to the stopper 17 of the outer casing 1. The latch 21 and the cover plate 15 are fitted into the outer casing 1 so as to be on the inside, and the step part 16 is fitted into the fitting locking part 6.

This prevents the latch 6 and the cover plate 15 from falling downward and coming out rearward.

Next, after pushing the latch 21 into the outer casing 1 (the latch 21 is always pressed outward by the spring 20) and aligning the sliding hole 25 with the insertion hole 10 and the insertion opening 18,
The leg portion 13 of 1 is inserted into the insertion hole 10, the sliding hole 25 and the insertion port 18.
The assembly is completed by inserting the pin 8 into the through holes 9, 9 and the pin hole 12.

The thus assembled top latch is fixed to the casement window frame or window frame via the mounting foot 5, and the fitting part 2 of the latch 21 is fixed to the casement window frame or window frame.
Fix the mating fitting into which 9 is inserted to the window frame or door frame.

Rotate the rod 11 to draw the fitting part 29 of the latch 21 into the outer casing 1, align the stopper and the outer case 1, and then release the rod 1. The force of the spring 20 causes the fitting part 29 to protrude and engage the stopper. It is inserted and the door frame is locked.

To open the door frame, rotate the rod 11 in the opposite direction and release the latch 21.
This is done by pulling the fitting part 29 into the outer casing 1 and removing the fitting part 29 from the stopper.

When the latch 21 slides, the spring 20 expands and contracts within the spring chamber 26 made of synthetic resin, so the operation is extremely smooth without any noise, and the latch 21 and cover plate 15 are , the sliding movement is extremely smooth since the spring chamber 26 is slid through the synthetic resin front bottom 26' and rear bottom 26''.

The present invention consists of a gutter-shaped outer casing with mounting legs near the front ends of both side plates, a cover plate fitted into the outer casing so as to completely cover the lower opening, and an inner side of the cover plate. and a gutter-shaped latch slidably inserted into the outer casing, and the outer casing includes:
Near the lower ends of the both side plates, a fitting locking portion is provided on the front end side, a locking portion is provided on the rear end side, and a pin through hole is provided inside the locking portion, and the upper plate is provided with: An insertion hole into which the leg is inserted is provided so that the rod can freely rotate back and forth, and the lid plate has an insertion hole into which the leg is inserted.
A stepped portion that fits into the fitting and locking portion at the front end, a stop portion that is partially cut out and bent inward, an insertion port into which the leg portion is inserted near the rear end, and the insertion port. A relief recess for the pin is provided near the center of the latch, and the larch has a sliding hole on its upper surface, and a synthetic resin that covers the inner wall of the upper surface and into which the spring and the stopper are fitted inside, and the front end and A spring chamber formed by shielding the open opening at the rear end is provided, and the legs of the rod are inserted into the insertion hole, the sliding hole, and the insertion opening, and the pin hole of the leg and the through hole are inserted. Since the top latch is characterized in that the spring is provided in the spring chamber and is locked in the stop portion that presses the latch outward, the top latch has the following effects.

(1) Since the structure is simple and assembly is easy, it can be provided to customers at low cost.

(2) The spring chamber is made of synthetic resin, allowing the spring to expand and contract smoothly, increasing the durability of the spring, which is the key to its functionality.

(3) Since the latch and the cover plate slide through the lower portions of the spring chamber, the latch operates extremely smoothly.

(4) The fitting part of the latch is made of synthetic resin to facilitate fitting with the mating fastener.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall perspective view;
Fig. 2 is a cross-sectional view taken along line A-A, Fig. 3 is a cross-sectional view taken along line B-B, Fig. 4 is a cross-sectional view taken along line C-C, and Fig. 5 is a perspective view of each disassembled part to explain the assembly method. . 1...Outer casing, 2...Side plate, 2'...
...Front end, 2''...Rear end, 3...Top plate, 5...Mounting leg, 6...Fitting locking part, 7 ...Locking part, 8...Pin, 9...
...Through hole, 10...Insertion hole, 11...
...rod, 12...pin hole, 13...
Leg part, 15... Lid plate, 16... Step part,
17...stop part, 18...insertion port 19
...Escape recess, 20...Spring, 21.
...Latch, 24...Top surface, 25...
...Sliding hole, 26... Spring chamber.

Claims (1)

[Scope of utility model registration request] A gutter-shaped outer casing with mounting legs provided near the front ends of both side plates, a lid plate fitted into the outer casing so as to completely cover the lower opening, and an outer casing on the inside of the lid plate. A gutter-shaped latch is slidably fitted into the housing, and the outer housing has a fitting locking portion on the front end side and a locking portion on the rear end side near the lower ends of the both side plates. and a through-hole for a pin inside the locking part, and an insertion hole into which the leg part is inserted so that the rod can be rotated back and forth is provided in the upper plate, and the cover plate has a through-hole for the pin. , a step portion at the front end that fits into the retention locking portion, a stop portion that is partially cut out and bent inward, an insertion port into which the leg portion is inserted near the rear end, and the insertion port. A relief recess for the pin is provided near the center of the latch, and the inner wall of the upper surface of the latch is covered with a synthetic resin, and a sliding hole is formed on the upper surface of the latch, and a spring and the stopper are fitted inside the latch. A spring chamber formed by shielding the open openings at the front end and the rear end is provided, and the leg portion is inserted into the insertion hole, the sliding hole, and the insertion opening, and the pin hole of the leg portion and the through hole are connected. through which the pin is engaged;
A top latch characterized in that the spring chamber is provided with the spring that is engaged with the stop portion that presses the latch outward.