Door and window hardware is a general designation of various metal and non-metal fittings installed on the doors and windows of buildings, which plays an auxiliary role when doors and windows are opened and closed. The surface is generally plated or coated, and has the characteristics of firmness, durability, flexibility, economy, beauty, etc. Doors and windows dagger and single-point locking device, as two very important hardware accessories, play a key role in the doors and windows system, but many people ignore its role, so here is a popular science for everyone:
Dagger
1. Dagger self-positioning force
? Tough? Can I take a rose curtain? Cow? Read the plaque? How about bad Tuo? 0N, otherwise, the Casement switch positioning capability becomes unstable, which will cause difficulties in opening and closing windows.
2. Window opening and closing force
? Tough? Is there a dam? Sodium sodium, sodium, sodium, sodium, and cymbal?? 0N, within the Casement opening range of 0-300mm, the opening and closing force of the dagger commonly used to open the upper suspension window should not exceed 40N.
3. Door and window gap
when Casement is in the closed state, under the action of external force, Ann? The change value of the sealing gap between the fan and frame at dagger of corner of the window should not exceed 0.5mm.
4. Rigidity of dagger
the judgment of rigidity of dagger should be judged according to the experiment, that is, Casement suffer different forces in three different parts to distinguish whether the performance of Dagger meets the requirements.
(1) Casement after being resisted by 300N in the process of enabling to a larger open category, it can still be enabled normally, as well as its own self-positioning force, opening and closing force, casement window frame gap three performance still excellent requirements.
(2) When Casement is closed, it is subject to the friction resistance of 300N, and the switch of Casement can still be normally enabled, as well as its positioning force, opening and closing force, casement window frame gap three performance still excellent requirements.
(3) Ann? The window with positioning equipment can still meet the normal opening of the window and the positioning force of the window itself after being subjected to the external force of 300N under the condition of opening the positioning equipment to the positioning point, three performance requirements of opening and closing force and window casement window frame gap.
5. Multiple opening and closing
the repeated opening of Casement 25,000 times is an inevitable experiment for doors and windows. Only after 25,000 times of repeated opening and closing, the opening and closing force of doors and windows should not exceed 80N, which is qualified.
6. Dagger strength
the repeated opening of Casement 25,000 times is an inevitable experiment for doors and windows. Only after 25,000 times of repeated opening and closing, the opening and closing force of doors and windows should not exceed 80N, which is qualified.
7. Casement hanging weight
casement after opening, use dagger to bear the pressure of 1000N for 5 minutes. Dagger all the parts are intact, the doors and windows are dagger qualified products.
Single-point lock
1. Strength of locking parts
before leaving the factory, the locking parts of the single-point lock device need to pass the pressure test of 400N for many times. After passing the test, they can leave the factory. However, the operating force of the single-point lock device during normal use is less than 20N.
2. Multiple closure
after 15000 repeated experiments, the single-point lock should be kept in normal use, which is a qualified lock.
