CN2159441Y

CN2159441Y - Automatic buffered door shut off device

Info

Publication number: CN2159441Y
Application number: CN 92237357
Authority: CN
Inventors: 杨本强; 袁志鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-10-31
Filing date: 1992-10-31
Publication date: 1994-03-23
Anticipated expiration: 2002-10-31

Abstract

The utility model discloses an automatic buffered door shutting off device. A door which is pushed away can be closed at a uniform speed automatically, and can be stopped through the device to avoid impacting a doorframe. The utility model is composed of two hinge mounts, a cylinder body, a piston rod, a sealing ring of the piston rod, a compression spring, an air bumper, and a self-locking positioning mechanism of the piston rod. The self-locking positioning mechanism has two forms, an awl sleeve whose awl surface is provided with a ring groove is fixed on the front part of the piston rod, and an elastic piston ring whose inner diameter is matched with the ring groove of the awl sleeve is arranged in the ring groove of a relevant hole of a rear end cover; an elastic piston ring is arranged in a ring groove at the front part of the piston rod, and the ring groove whose outer diameter is matched with the elastic piston ring is arranged in a relevant awl hole of the rear end cover.

Description

Automatic buffered door shut off device

The utility model relates to a kind of automatic door closer tool.

After being opened, door can close automatically, and avoid too quickly knocking door case, send discordant noise, influence study and work, a too quickly upper glass or the hinge of breaking of closing the door when especially having prevented wind, several buffer-type automatic door closers are provided on the market, a kind of air cylinder tie rod formula door closer is wherein arranged,, action simple and compact for structure with it is generous and be subjected to the user and welcome with appearance looks elegant accurately and reliably.This door closer is by being fixed on fixed hinge axle on the doorframe and the swing type cylinder block hinged with it, be fixed on moveable hinge chain rivet on the door and the piston rod hinged with it, be fixed on the reciprocating type one-way sealing ring of piston rod front end, one end bearing is on the anterior shaft shoulder of piston rod and the other end is bearing in the compression spring on the cylinder block rear end cap end face, be contained in the air damper of adjustable displacements of cylinders ante-chamber exhaust velocity on the cylinder block drive end bearing bracket and the self-locking positioning mechanism composition that is pulled to extreme position its stop in season when piston rod.When opening the door, door leaf is by moveable hinge chain rivet pulling piston rod, and against the force of the spring outwards extends, and cylinder block is only swung around the fixed hinge axle.Because the one-way sealing ring of piston rod front end does not seal this moment, so it is brisk and rapid to open the door.When the people that opens the door decontroled door leaf, piston rod was withdrawn in cylinder under the spring tension effect, drive door leaf and close, but at this moment joint ring seals, and the air in the cylinder ante-chamber discharges by damper, thereby closing the door motion is slowed down and at the uniform velocity.When door during near doorframe, lost sealing function again behind the circuitous empty cutter that has arrived on the cylinder block sleeve lining of joint ring, make a chance that obtains an acceleration, produce minor impact with doorframe, door is closed lean on, make built-in lock or bump pearl and go into to anchor the position.For an energy is stopped (in order to ventilate or the carrying article), should when being pulled near extreme position, piston rod make its stop with self-locking positioning mechanism after unlatching.Known at present two kinds of self-locking positioning mechanisms, the first are fixed a tapered sleeve in the piston rod front portion, be shaped on corresponding hole on the cylinder block rear end cap, and when piston rod was pulled out to extreme position, the tapered sleeve hand-hole was also blocked by the hole, can not be from dialling.This mechanism's self-lock force is very big, though the location is reliable, will could remove self-locking with greater impact power at closing time, has obviously influenced the life-span of door and hinge; It two is bent plates that the upper cover of piston rod outside cylinder block has a sheet iron plate to make, manually it after moving on to the appropriate location, piston rod is decontroled door more earlier after opening the door, the bent plate ledge is run into and is produced after the cylinder block crookedly in the piston rod withdrawal process, utilizes mating holes on the bent plate that piston rod is blocked and stops retraction movement.Though this mechanism is simple in structure, and door can be stopped everywhere, use trouble, go operation with hand, also greasy filth is done sometimes on hand, child or sawed-off people can't reach, and the time has been grown also and can block bad piston rod.

Task of the present utility model provides a kind of improved automatic door closer, has above-mentioned repertoire, but requires the piston rod self-locking positioning mechanism simple in structure, easy to use and reliable effect, and can remove self-locking state with less power.

Solution has two, the first is on the basis of existing air cylinder tie rod formula automatic door closer, fix the tapered sleeve of band groove on the conical surface in the front portion of piston rod, make annular groove in the centre bore of cylinder block rear end cap, the corresponding to elasticity of annular groove that is equipped with in the groove on internal diameter and the tapered sleeve is opened circle.It two is on the basis of existing air cylinder tie rod formula automatic door closer, makes the center taper hole of band inner groove on the cylinder block rear end cap, the corresponding to elasticity of annular groove is housed in the annular groove of piston rod front portion in external diameter and the rear end cap taper hole opens circle.

The action principle of above-mentioned two kinds of schemes is identical.Tapered sleeve annular groove (or the elastic piston ring in the piston rod annular groove) on the piston rod that (is generally 90 °～110 °) when door is opened to certain angle is blocked by the elastic piston ring (or the annular groove in the taper hole of center) in the cylinder block rear end cap endoporus annular groove, produce the lock-bit effect, as long as the impact force that opposite house is in addition less, self-locking state can be removed, reliable effect, simple in structure, cost is low and easy to use laborsaving, the life-span influence of opposite house is less, and good looking appearance is generous.

The embodiment that provides below in conjunction with accompanying drawing replenishes description to it.

Fig. 1 is scheme one an automatic door closer structure chart;

Fig. 2 is scheme two piston rod self-locking positioning mechanism schematic diagrames.

As shown in Figure 1, the utility model is by fixed hinge axle (11) and the swing type cylinder block (1) (5) (13) hinged with it, moveable hinge chain rivet (2) and the piston rod (3) hinged with it, one-way sealing ring (10), the other end is bearing in the compression spring (8) on the rear end cap (5) to one end bearing in that the piston rod shaft shoulder (9) is last, be contained in the air damper A-(12 on the drive end bearing bracket (13)) and the piston rod self-locking positioning mechanism form, its improvements are that above-mentioned self-locking positioning mechanism is by the tapered sleeve (7) that has annular groove (B) on the conical surface that is fixed on the piston rod front portion be contained in elastic piston ring (6) formation in rear end cap (5) the centre bore inner groove.For simplifying technology and improving stock utilization, available shaft block ring (14) and the flange cover (9) that is stuck in piston rod (3) annular groove of the above-mentioned piston rod shaft shoulder (9) replaces.

Can see the structure of second kind of piston rod self-locking positioning mechanism by Fig. 2, be made up of the elastic piston ring (15) and interior external diameter and the corresponding to annular groove of piston ring (15) (C) of rear end cap center taper hole (D) that are embedded in the anterior annular groove of piston rod (3), taper hole (D) is provided with for elastic piston ring (15) is easy to enter (C) groove.

The empty cutter (E) of the sleeve among Fig. 1 (4) inwall front end is exactly that the aforementioned door generation instantaneous acceleration when leaning near the pass that makes is used.For making piston rod when withdrawal cylinder back cavity can obtain replenish air, the joint ring (4) in the rear end cap upper piston rod mating holes is located to leave appropriate gap.In order to solve the other strength problem of action that alignment error of the present utility model may cause, can make the less taper hole of tapering by mating holes drive end bearing bracket (13) is last and the fixed hinge axle, make door closer that a spot of move place also be arranged in vertical plane.

The utility model also can be used for warehouse gate except that door, door and lid and instrument case lid etc. on the structural establishment are located.

Claims

1, the buffer-type automatic door closer, by being fixed on fixedly articulated axle (11) on the doorframe and the swing type cylinder block (1) (5) (13) hinged with it, can be fixed on moveable hinge chain rivet (2) on the door and the piston rod (3) hinged with it, be fixed on the reciprocating type one-way sealing ring (10) of piston rod (3) front end, the other end is bearing in the compression spring (8) on cylinder block rear end cap (5) end face to one end bearing in that the anterior shaft shoulder of piston rod (3) (9) is last, be contained in cylinder block drive end bearing bracket (13) and go up the air damper A-(12) of adjustable displacements of cylinders ante-chamber exhaust velocity and the self-locking positioning mechanism composition that is pulled to extreme position its stop in season when piston rod (3), wherein cylinder block sleeve (1) inwall is provided with sky cutter (E), it is characterized in that form mutually by the annular groove and the elastic piston ring of idol by a pair of diameter dimension in the centre bore of front portion that is located at piston rod (3) respectively and rear end cap (5) for said piston rod self-locking positioning mechanism.

2, door closer according to claim 1, it is characterized in that, elastic piston ring (6) in the said piston rod self-locking positioning mechanism is contained in the centre bore of rear end cap (5), and with its internal diameter size mutually the annular groove (B) of idol on the conical surface that is fixed in the anterior tapered sleeve (7) of piston rod (3).

3, door closer according to claim 1, it is characterized in that, elastic piston ring (15) in the said piston rod self-locking positioning mechanism is contained in the anterior groove of piston rod (3), and with its outside dimension mutually the annular groove (C) of idol on the inner conical surface of the center taper hole (D) of rear end cap (5).