Doors and windows rely on hardware accessories to complete the functions of doors and windows. Hardware is a product that is easy to be worn out in building doors and windows, and it is also one of the common parts of activities, the selection of hardware accessories will directly affect the quality of doors and windows, as well as the safety and air tightness of doors and windows. If there is no high-quality door and window hardware accessories as foil, there is no legal system to make efficient door and window products.
So, what is door and window hardware? How to choose door and window hardware?
01. What is the door and window hardware system?
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.
Door and window hardware can be divided into opening and closing parts, bearing parts, operating parts and auxiliary parts. Through the matching and integration of the system, it serves the subsystems of the door and window system.
It also requires systematic technical support and after-sales service. We can not simply say a certain hardware product, nor can we abandon separate hardware components and talk about the concept of "door and window hardware system.
A systematic concept should be established to make corresponding plans for various hardware products. Within the framework of the large "door and window system", the changes of profiles, glass, adhesive strips, processing techniques, and even the opening methods of doors and windows, all need corresponding changes in door and window hardware to better serve doors and windows.
02. What is the impact of load on the selection of door and window hardware accessories?
Load requirements for hardware accessories of doors and windows: when hardware is selected, the three functions of doors and windows (wind pressure resistance, water tightness, air tightness) and performance requirements of heat preservation, heat insulation, sound insulation, etc. must be ensured first. In 2012, the Ministry of Housing and Urban-Rural Development re-promulgated the GB50009-2012 load code for building structures.
Temperature effect, variable load, accidental load, permanent load, wind load height variation coefficient and mountain terrain correction coefficient (entry "correction coefficient" provided by industry Encyclopedia) and other parameters have been added and adjusted, and the contents and methods of wind vibration calculation have been greatly improved and perfected. The basic snow pressure and basic wind pressure values of some cities have been adjusted, and new national basic snow pressure and basic wind pressure maps have been drawn. It provides more detailed theoretical basis for our calculation.
03. How to calculate the lock point formula?
The calculation of the number of Lock points is complicated. Here, a simplified formula for calculating the number of Lock points is recommend:
set n a lock point; W A width; H a height; Wk a standard wind pressure; The safety factor is 2.5 times, then n = W × H × 2.5 × Wk/0.8 (unit)
calculation example:
A building in a certain place, calculated Wk is 2.2KN/m2, find the number of locking points for Windows with a height of 1.2 and a width of 0.6 meters: N = 1.2 × 0.6 × 2.5 × 2.2/0.8 & asynmp; 5 (unit)
after determining the number of locking points, you need to select the appropriate hardware category according to the section shape of door & window profile. Different types of hardware, the shape and usage of Lock points are different. Generally, casement window hinge or dagger are regarded as lock points.
04. Should we set door & window profile or hardware accessories first to make a set of door and window systems?
When considering the problem of hardware selection in the door and window system, it is first necessary to have an overall research and understanding of the door and window system. Especially the design and selection of profile size.
It can be said that there is no good profile as the cornerstone, and what kind of hardware can not be used to make good doors and windows. The profile and hardware should be comprehensively considered and selected. Be careful not to select the profile and then select the hardware. This situation sometimes leads to the lack of matching hardware due to the nonstandard profile.
Now most real estate developers will consider the cooperation between profiles and hardware, and then give them a choice. The selection of accessories should consider its universality and rationality, and also consider the manufacturability and material quality of accessories production.
05, door closer how to adjust the closing power?
Step 1:
door closer can only be installed on the upper part of the door leaf near the side of the hinge. One end of the body has a speed control screw facing the hinge. Otherwise, the door can not be opened normally. If it is forcibly opened, door closer, the slot of the door leaf and the upper door frame will be damaged. Use four screws to fix the body to the door leaf, then put the lever into the upper end of the gear shaft, install the cap on the other end, and tighten the fastening screws.
Step 2:
install the connecting rod and use two screws to fix the connecting rod on the door frame. The hand-held connecting rod is at a right angle to the upper door frame. Loosen the lock nut, adjust the connecting rod to the appropriate length, gently pull the lever, so that the lever pin is just inserted into the hole at the end of the connecting rod, and check that the connecting rod is at right angles to the upper door frame. Put on the washer and fasten it with the semicircle head screws. Lock nut, installation completed.
Step 3:
adjust the closing speed the closing speed has been adjusted. If you need to change the speed, turn the speed control screw as shown in the figure.
06. Structure and principle of embedded door top door closer
(1) structure: the embedded door Top Spring consists of a hydraulic buffer spring installed on the door leaf, a slide, a slider and a link rod mounted on the door frame, etc. Because the embedded door top door closer is installed in the slot of the door leaf and door frame, it does not affect the appearance of the door when the door is closed, and it is suitable for the door of high-end hotel rooms.
(2) principle: the hydraulic buffer spring gives Link Rod a recovery torque to rotate link rod away from the hinge, thus driving the slider to move away from the hinge in the slide at the same time, to achieve the goal of closing the door. There is a temporary locking card at the front end of the slide. When the door leaf is opened to the right angle position, the slider moves to the side close to the hinge, and the locking card clicks into the tongue groove at the front end of the slider, temporarily lock the door in this position.
07. Door closer what problems should be paid attention to when adjusting the closing power?
(1) exterior door top door closer is not suitable for two-way door opening.
(2) speed adjustment screw controls the switching speed of the door. Clockwise rotation is slow, counterclockwise rotation is fast.
(3) screws and sealing parts in other places should not be twisted at will to prevent oil leakage.
