EP3191668B1 - Pneumatic floor spring - Google Patents

Pneumatic floor spring Download PDF

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Publication number
EP3191668B1
EP3191668B1 EP15840470.7A EP15840470A EP3191668B1 EP 3191668 B1 EP3191668 B1 EP 3191668B1 EP 15840470 A EP15840470 A EP 15840470A EP 3191668 B1 EP3191668 B1 EP 3191668B1
Authority
EP
European Patent Office
Prior art keywords
housing
guide base
piston
guide
floor spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP15840470.7A
Other languages
German (de)
French (fr)
Other versions
EP3191668B8 (en
EP3191668A1 (en
EP3191668A4 (en
Inventor
Long Li
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weifang Zhengxin Pneumatic Technology Co Ltd
Original Assignee
Weifang Zhengxin Pneumatic Tech Co Ltd
Weifang Zhengxin Pneumatic Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weifang Zhengxin Pneumatic Tech Co Ltd, Weifang Zhengxin Pneumatic Technology Co Ltd filed Critical Weifang Zhengxin Pneumatic Tech Co Ltd
Publication of EP3191668A1 publication Critical patent/EP3191668A1/en
Publication of EP3191668A4 publication Critical patent/EP3191668A4/en
Application granted granted Critical
Publication of EP3191668B1 publication Critical patent/EP3191668B1/en
Publication of EP3191668B8 publication Critical patent/EP3191668B8/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/02—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with pneumatic piston brakes
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/14—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with fluid brakes of the rotary type
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/22—Additional arrangements for closers, e.g. for holding the wing in opened or other position
    • E05F3/225—Additional arrangements for closers, e.g. for holding the wing in opened or other position mounted at the bottom of wings, e.g. details related to seals, covers, connections to the wings, embedding in the floor
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/20—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices in hinges

Definitions

  • the present invention relates to the field of door closers, and more particularly to a pneumatic floor spring for door rotation.
  • Floor spring is one type of door closer.
  • its device for spring compression is a worm gear instead of a rack and pinion.
  • Floor springs are applied more widely than door closers due to the fact that the worm gear is rotatable in both forward and backward directions.
  • Floor springs are applicable for bidirectional opening of a door, whereas door closers are only able to open a door in a unidirectional way. The both, however, can automatically restore a glass door to its initial closure state, thereby avoiding injury to people caused by swinging of the door leaf when the glass door is closed.
  • JP H11 247522 A disclosing the features of the preamble of claim 1.
  • the technical problem to be solved by the present invention is to overcome the defects mentioned above and provide a pneumatic floor spring, which is small in size, convenient to install, skillful in structure and long in service life.
  • the pneumatic floor spring comprises a fixed plate and is characterized in that: a housing is fixedly arranged on the bottom surface of the fixed plate, and a bottom cover is arranged on the lower end of the housing;
  • the pneumatic floor spring further comprising: the guide base is provided with cross-shaped rounded guide base grooves, and rounded lug bosses are arranged between the guide base grooves; the convex rotor is provided with a straight rounded projection mated with the rounded guide base groove, and rotor grooves mated with the lug bosses are arranged around the projection.
  • the housing, the convex rotor and the guide base are all cylindrically structured.
  • six guide grooves are uniformly distributed on the periphery of the guide base.
  • the piston is a hollow cylinder, and one end of the piston facing the gas chamber is provided with an opening, while the other end is closed.
  • One end of the piston connected with the guide base is provided with a wearproof cover.
  • the convex rotor and the housing are provided with a copper pad.
  • the pneumatic floor spring of the present invention has the advantages of small size, convenient installation, reduced costs in production and installation, shortened installation time and greatly improved working efficiency.
  • the problem of oil leakage is fundamentally solved because of the use of the pneumatic mode, and moreover, the structure is so compact that the rotating shaft is hardly eccentric, thus the service life is remarkably prolonged.
  • a pneumatic floor spring comprises a fixed plate 2, a housing 1 is fixedly arranged on the bottom surface of the fixed plate 2, and a bottom cover 15 is arranged on the lower end of the housing 1; a convex rotor 4 is arranged inside the housing 1; the end of the convex rotor 4 penetrates through the fixed plate 2 and a rotating shaft 14 is fixedly arranged on the end of the convex rotor 4; the lower end of the convex rotor 4 is mated with a guide base 6; the housing 1, the convex rotor 4 and the guide base 6 are all cylindrically structured.
  • the guide base 6 is vertically provided with guide grooves 7, six guide grooves 7 are uniformly distributed on the periphery of the guide base 6, and there is no doubt that different number of guide grooves 7 can be arranged as required; the guide grooves 7 are mated with the interior of the housing 1, the interior of the housing 1 protrudes to form a guide bar that is mated with the guide grooves 7, and the guide base 6 can only perform a vertical movement, rather than a rotational movement; a piston 8 is arranged on the bottom of the guide base 6; a supporting plate 11 is arranged inside the housing 1 and the piston 8 penetrates through the supporting plate 11; the piston 8 and the supporting plate 11 are provided with a sealing ring 10; the supporting plate 11, the housing 1 and the bottom cover 15 together form a closed gas chamber 13; and the gas chamber 13 is filled with compressed nitrogen.
  • the piston 8 is a hollow cylinder, and one end of the piston 8 facing the gas chamber 13 is provided with an opening, while the other end is closed, so as to form a piston chamber 12.
  • One end of the piston 8 connected with the guide base 6 is provided with a wearproof cover 9.
  • the convex rotor 4 and the housing 1 are provided with a copper pad 3.
  • the guide base 6 is provided with cross-shaped rounded guide base grooves 61, and rounded lug bosses 62 are arranged between the guide base grooves 61;
  • the convex rotor 4 is provided with a straight rounded projection 41 mated with the rounded guide base groove 61, and rotor grooves 42 mated with the lug bosses 62 are arranged around the projection 41.
  • the guide base 6 can only move up and down and the convex rotor 4 is driven to rotate by the rotating shaft, thus during the process of rotation, the straight projection 41 presses down the lug bosses 62 while rotating, the guide base 6 moves downwards, and after the projection 41 is rotated by 90°, the guide base 6 enters into another guide base groove 61, in which case the door is also rotated by 90°, that is, door is opened or closed; the above action is repeated every time the door is opened or closed, which accordingly brings great simplicity, convenience and durability

Landscapes

  • Fluid-Damping Devices (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)

Description

    Technical Field
  • The present invention relates to the field of door closers, and more particularly to a pneumatic floor spring for door rotation.
    • Background Art
  • Floor spring is one type of door closer. During the operation of a current floor spring, its device for spring compression is a worm gear instead of a rack and pinion. Floor springs are applied more widely than door closers due to the fact that the worm gear is rotatable in both forward and backward directions. Floor springs are applicable for bidirectional opening of a door, whereas door closers are only able to open a door in a unidirectional way. The both, however, can automatically restore a glass door to its initial closure state, thereby avoiding injury to people caused by swinging of the door leaf when the glass door is closed.
  • Yet, it has been found during the installation and use of the traditional floor springs that they have the following defects that:
    1. (1) the traditional floor springs are large in size and high in material consumption and cost;
    2. (2) the traditional floor springs are so inconvenient to install that a large hole often needs to be cut by installers at first and thereafter at least two persons are required to install such floor springs properly, which therefore reduces working efficiency remarkably;
    3. (3) Oil leakage tends to occur in the housing. If blister is caused in the process of casting, then the phenomenon of oil leakage is easy to emerge because of a large liquid pressure inside the housing;
    4. (4) there is a quite high possibility for the rotating shaft to be eccentric, leading to the offset of the door body from the center line of the door leaf after installed.
  • The relevant state of the art is represented by JP H11 247522 A disclosing the features of the preamble of claim 1.
    • Summary of the Invention
  • The technical problem to be solved by the present invention is to overcome the defects mentioned above and provide a pneumatic floor spring, which is small in size, convenient to install, skillful in structure and long in service life.
  • To solve the abovementioned problems, the technical solution adopted by the present invention is defined by the features of claim 1. The pneumatic floor spring comprises a fixed plate and is characterized in that: a housing is fixedly arranged on the bottom surface of the fixed plate, and a bottom cover is arranged on the lower end of the housing;
    • a convex rotor is arranged inside the housing;
    • the end of the convex rotor penetrates through the fixed plate and a rotating shaft is fixedly arranged on the end of the convex rotor;
    • the lower end of the convex rotor is mated with a guide base;
    • the guide base is vertically provided with guide grooves;
    • the guide grooves are mated with the interior of the housing;
    • a piston is arranged on the bottom of the guide base;
    • a supporting plate is arranged inside the housing and the piston penetrates through the supporting plate;
    • the piston and the supporting plate are provided with a sealing ring;
    • the supporting plate, the housing and the bottom cover together form a closed gas chamber;
    • the gas chamber is filled with compressed nitrogen.
  • The pneumatic floor spring further comprising: the guide base is provided with cross-shaped rounded guide base grooves, and rounded lug bosses are arranged between the guide base grooves; the convex rotor is provided with a straight rounded projection mated with the rounded guide base groove, and rotor grooves mated with the lug bosses are arranged around the projection.
  • The housing, the convex rotor and the guide base are all cylindrically structured.
  • As a further improvement:
    six guide grooves are uniformly distributed on the periphery of the guide base.
  • As a still further improvement:
    the piston is a hollow cylinder, and one end of the piston facing the gas chamber is provided with an opening, while the other end is closed.
  • One end of the piston connected with the guide base is provided with a wearproof cover.
  • As a still further improvement:
    four fixed holes are uniformly distributed on the fixed plate.
  • As a still further improvement:
    the convex rotor and the housing are provided with a copper pad.
  • Due to the adoption of the abovementioned technical solution, the pneumatic floor spring of the present invention has the advantages of small size, convenient installation, reduced costs in production and installation, shortened installation time and greatly improved working efficiency. In addition, the problem of oil leakage is fundamentally solved because of the use of the pneumatic mode, and moreover, the structure is so compact that the rotating shaft is hardly eccentric, thus the service life is remarkably prolonged.
  • The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
    • Brief Description of the Drawings
    • Fig. 1 is a structural diagram of an embodiment of the pneumatic floor spring of the present invention;
    • Fig. 2 is a structural diagram of the end of the guide base in Fig. 1.
    • Fig. 3 is a structural diagram of the end of the convex rotor in Fig. 1.
  • In the drawings: 1-housing; 2-fixed plate; 3-copper pad; 4-convex rotor; 5-fixed hole; 6-guide base; 7-guide groove; 8-piston; 9-wearproof cover; 10-sealing ring; 11-supporting plate; 12-piston chamber; 13-gas chamber; 14-rotating shaft; 15-bottom cover
    • Detailed Description of the Invention
  • Embodiment: as shown in Fig. 1, a pneumatic floor spring comprises a fixed plate 2, a housing 1 is fixedly arranged on the bottom surface of the fixed plate 2, and a bottom cover 15 is arranged on the lower end of the housing 1;
    a convex rotor 4 is arranged inside the housing 1;
    the end of the convex rotor 4 penetrates through the fixed plate 2 and a rotating shaft 14 is fixedly arranged on the end of the convex rotor 4;
    the lower end of the convex rotor 4 is mated with a guide base 6; the housing 1, the convex rotor 4 and the guide base 6 are all cylindrically structured.
  • The guide base 6 is vertically provided with guide grooves 7, six guide grooves 7 are uniformly distributed on the periphery of the guide base 6, and there is no doubt that different number of guide grooves 7 can be arranged as required;
    the guide grooves 7 are mated with the interior of the housing 1, the interior of the housing 1 protrudes to form a guide bar that is mated with the guide grooves 7, and
    the guide base 6 can only perform a vertical movement, rather than a rotational movement;
    a piston 8 is arranged on the bottom of the guide base 6; a supporting plate 11 is arranged inside the housing 1 and the piston 8 penetrates through the supporting plate 11; the piston 8 and the supporting plate 11 are provided with a sealing ring 10; the supporting plate 11, the housing 1 and the bottom cover 15 together form a closed gas chamber 13; and the gas chamber 13 is filled with compressed nitrogen.
  • The piston 8 is a hollow cylinder, and one end of the piston 8 facing the gas chamber 13 is provided with an opening, while the other end is closed, so as to form a piston chamber 12.
  • One end of the piston 8 connected with the guide base 6 is provided with a wearproof cover 9.
  • Four fixed holes 5 are uniformly distributed on the fixed plate 2,
  • The convex rotor 4 and the housing 1 are provided with a copper pad 3.
  • As shown in Fig. 2 and Fig. 3, the guide base 6 is provided with cross-shaped rounded guide base grooves 61, and rounded lug bosses 62 are arranged between the guide base grooves 61; the convex rotor 4 is provided with a straight rounded projection 41 mated with the rounded guide base groove 61, and rotor grooves 42 mated with the lug bosses 62 are arranged around the projection 41.
  • When the floor spring is installed, only the cylindrical housing needs to be buried underground at first and then further fixed using screws or bolts through the fixed holes 5, which is extremely convenient.
  • When the floor spring is in use, the guide base 6 can only move up and down and the convex rotor 4 is driven to rotate by the rotating shaft, thus during the process of rotation, the straight projection 41 presses down the lug bosses 62 while rotating, the guide base 6 moves downwards, and after the projection 41 is rotated by 90°, the guide base 6 enters into another guide base groove 61, in which case the door is also rotated by 90°, that is, door is opened or closed; the above action is repeated every time the door is opened or closed, which accordingly brings great simplicity, convenience and durability

Claims (7)

  1. A pneumatic floor spring, comprising a fixed plate (2), and a housing (1) that is fixedly arranged on the fixed plate (2), and a bottom cover (15) is arranged on the lower end of the housing (1);
    a convex rotor (4) is arranged inside the housing (1);
    a rotating shaft (14) is fixedly arranged on the end of the convex rotor (4);
    the lower end of the convex rotor (4) is mated with a guide base (6);
    the guide base (6) is vertically provided with guide grooves (7);
    the guide grooves (7) are mated with the interior of the housing (1), the interior of the housing (1) protrudes to form a guide bar that is mated with the guide grooves (7), and the guide base (6) being configured to provide a vertical movement;
    a piston (8) is arranged on the bottom of the guide base (6);
    a supporting plate (11) is arranged inside the housing (1) and the piston (8) penetrates through the supporting plate (11);
    the piston (8) and the supporting plate (11) are provided with a sealing ring (10);
    the supporting plate (11), the housing (1) and the bottom cover (15) together form a closed gas chamber (13);
    the gas chamber (13) is filled with compressed nitrogen; characterized in that the housing (1) is fixedly arranged on the bottom surface of the fixed plate (2), and the end of the convex rotor (4) penetrates through the fixed plate (2); and wherein the guide base (6) is provided with cross-shaped rounded guide base grooves (61), and rounded lug bosses (62) are arranged between the guide base grooves (61); the convex rotor (4) is provided with a straight rounded projection (41) mated with the rounded guide base groove (61), and rotor grooves (42) mated with the lug bosses (62) are arranged around the projection (41).
  2. The pneumatic floor spring according to claim 1, characterized in that: the housing (1), the convex rotor (4) and the guide base (6) are all cylindrically structured.
  3. The pneumatic floor spring according to claim 1, characterized in that: six guide grooves (7) are uniformly distributed on the periphery of the guide base (6).
  4. The pneumatic floor spring according to claim 1, characterized in that: the piston (8) is a hollow cylinder, and one end of the piston (8) facing the gas chamber (13) is provided with an opening, while the other end is closed, so as to form a piston chamber (12).
  5. The pneumatic floor spring according to claim 4, characterized in that: one end of the piston (8) connected with the guide base (6) is provided with a wearproof cover (9).
  6. The pneumatic floor spring according to claim 1, characterized in that: four fixed holes (5) are uniformly distributed on the fixed plate (2).
  7. The pneumatic floor spring according to claim 1, characterized in that: the convex rotor (4) and the housing (1) are provided with a copper pad (3).
EP15840470.7A 2014-09-11 2015-08-14 Pneumatic floor spring Expired - Fee Related EP3191668B8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410459990.5A CN104234561B (en) 2014-09-11 2014-09-11 Pneumatically spring
PCT/CN2015/086937 WO2016037518A1 (en) 2014-09-11 2015-08-14 Pneumatic floor spring

Publications (4)

Publication Number Publication Date
EP3191668A1 EP3191668A1 (en) 2017-07-19
EP3191668A4 EP3191668A4 (en) 2017-10-11
EP3191668B1 true EP3191668B1 (en) 2018-11-21
EP3191668B8 EP3191668B8 (en) 2019-01-09

Family

ID=52223377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15840470.7A Expired - Fee Related EP3191668B8 (en) 2014-09-11 2015-08-14 Pneumatic floor spring

Country Status (3)

Country Link
EP (1) EP3191668B8 (en)
CN (1) CN104234561B (en)
WO (1) WO2016037518A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104234561B (en) * 2014-09-11 2016-09-28 李龙 Pneumatically spring
CN106121429A (en) * 2016-08-30 2016-11-16 李龙 Hinge pneumatic door closer and the hinge of applying this pneumatic door closer thereof

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1275403A (en) * 1960-09-13 1961-11-10 Applic Tech Du Caoutchouc Soc Closing device, especially for hinged doors
CN2036990U (en) * 1988-08-31 1989-05-03 赵鲁光 Automatic vertical door-closing device with tapered guide wheel
KR960014378B1 (en) * 1993-12-28 1996-10-15 서보상 Door closer for floor hinge
CN2214504Y (en) * 1994-05-21 1995-12-06 浙江兰溪机床厂双冠汽配联营厂 Pneumatic spring shutoff for door
JPH11247522A (en) * 1998-03-04 1999-09-14 Tokico Ltd Rotary damper
KR200324642Y1 (en) * 2003-06-03 2003-08-25 박형태 Floor hinge
US7243394B2 (en) * 2005-02-22 2007-07-17 Ching Chih Kao Door closing hinge device
CN201460554U (en) * 2009-04-08 2010-05-12 秦中银 Vertical built-in floor spring
CN201486334U (en) * 2009-05-31 2010-05-26 黄文朋 Automatic closing hinge
CN102337818A (en) * 2011-10-09 2012-02-01 肇庆市端州区志德五金有限公司 Door control gas spring
CN204060288U (en) * 2014-09-11 2014-12-31 李龙 One is spring pneumatically
CN104234561B (en) * 2014-09-11 2016-09-28 李龙 Pneumatically spring

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3191668B8 (en) 2019-01-09
EP3191668A1 (en) 2017-07-19
WO2016037518A1 (en) 2016-03-17
CN104234561B (en) 2016-09-28
CN104234561A (en) 2014-12-24
EP3191668A4 (en) 2017-10-11

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