Now, the automatic door closer has replaced the manual door closing method. More and more scenes begin to use automatic door closers, such as large shopping malls, hospitals and other places. The automatic door closer can reduce manual opening, protect the door frame and prolong the service life of the door frame. How is the automatic door closer installed? Do different types of door closers have different installation methods? Here are some tips for Feifeimen.
1. External top door closer
The external door closer is equipped with a hydraulic buffer oil pump device, which can automatically close the door after it is opened. Its main feature is that the door is slow to close, and there is no collision sound after closing. It can be used on the doors of schools, hospitals, office buildings and hotels.
(1) Installation steps
Step 1: Install the body
The door closer can only be installed on the upper part of the door leaf close to the hinge, and the end of the machine body without speed regulating screws faces the hinge, otherwise, the door will not open. If forced to open, the door closer, door leaf and door frame will be damaged. Fix the machine body on the door leaf with four screws, then slide 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
Fix the connecting rod on the door frame with two screws. The hand-held connecting rod is at right angle to the door frame. Loosen the lock nut, adjust the connecting rod to a suitable length, gently move 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 a right angle to the door frame. Put on the washer and fasten it with the half round head screw. Lock the nut and install it.
Step 3: Adjust the closing speed
The closing speed has been adjusted. If it is necessary to change the speed, turn the speed regulating screw as shown in the figure.
(2) Precautions
A The external top door closer is not applicable to two-way door opening.
B The speed adjusting screw controls the opening and closing speed of the door. Clockwise rotation is slow, and counterclockwise rotation is fast.
C The door closer shall be filled with antifreeze oil after being used for 1 year. When refueling, screw out the oil hole screw to refuel, and tighten the screw when the oil is full.
D Other screws and sealing parts shall not be screwed at will to prevent oil leakage.
2. Embedded top door closer
(1) Structure
The embedded door top spring is composed of the hydraulic buffer spring installed on the door leaf, the slideway, the sliding block and the connecting rod installed on the door frame. As the built-in top door closer is installed in the slot of the door leaf and door frame, the appearance of the door will not be affected when the door is closed. The utility model is suitable for the doors of the guest rooms of the high-end hotels.
(2) Principle
The hydraulic buffer spring gives the linkage a restoring torque, which makes the linkage rotate away from the hinge, thus driving the slider to move away from the hinge in the slide way at the same time, so as to achieve the goal of closing the door.
There is a temporary locking card at the front end of the slideway. When the door leaf is opened to a right angle position, the slider moves to the side close to the hinge, and the locking card is stuck into the tongue groove at the front end of the slider to temporarily lock the door at this position.
(3) Key points of installation
A Before the door frame and leaf are put in place, snap lines and notch at the top of the door leaf and the bottom of the upper sill of the door frame.
B Then embed the hydraulic buffer spring in the groove before installing the doors and windows, and screw the slide way into the door frame groove with screws.
C After the door frame and leaf are installed and fixed, the connecting rod shall be fixed on the spring shaft with nuts.
3. Door bottom spring
Door bottom spring or automatic door bow is divided into horizontal type and straight type.
(1) Structure
The door bottom spring is composed of upper and lower parts. The upper part is the top shaft and top shaft sleeve plate, and the lower part is the bottom shaft and spring body. Its function is equivalent to a double reed hinge, which can automatically close the door leaf after it is opened. When automatic closing of the door leaf is not required, open the door leaf to 90 °. The bottom spring of the door can be used on the spring wooden door or the door which is opened both inside and outside.
(2) Key points of installation
A Install the top shaft on the upper sill of the door frame, and install the top shaft sleeve plate on the top of the door leaf. The two centers must be aligned.
B Lift a plumb line down from the center of the top shaft to the ground, and find out the center line position of the bottom shaft installed on the floor and the position of the wood screw hole on the bottom plate. Then remove the jacking shaft.
C First install the main body of the door bottom spring (referring to the frame base plate, etc.) at the lower part of the door leaf, and then put the door leaf into the door frame, aligning the center of the top and bottom shafts and the position of the screw holes on the base plate.
D Then fix the top shaft on the door frame, the bottom plate on the floor, and the bottom plate should be flush with the floor.
E Finally, install the frame cover plate with the spring body on the door leaf.
(3) The installation of straight door bottom spring is the same as that of horizontal type.
The installation of automatic door closer is a relatively complicated work, which cannot be completed alone. It needs professionals to follow the correct method to achieve the use effect. The automatic door closer uses gear adjustment to open the door at will, which has become more and more common in our daily life. When selecting the automatic door closer, we should also observe whether it has the national GB9305-88 standard to prevent people from being harmed by using inferior products.