Door suspension device

Patent metadata

Field	Value
Publication number	US-9702178-B2
Application number	US-201615019204-A
Country	US
Kind code	B2
Filing date	Feb 9, 2016
Priority date	Feb 10, 2015
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A door suspension device includes a driving-side member, a hanger, an elastic member, and a first adjustment bolt. The hanger is configured so as to be displaceable in an opening and closing direction in conjunction with the driving-side member and supports a door. The elastic member allows relative displacements of the driving-side member and the hanger by elastically deforming in accordance with a load between the driving-side member and the hanger. The first adjustment bolt is a member for adjusting an initial value of a load that acts between the driving-side member and the hanger. The first adjustment bolt includes a male screw section to be fixed to the driving-side member, and a head which is arranged so that an axial force acting on the first adjustment bolt is received by an edge of the hanger.

First claim

The invention claimed is:

1. A door suspension device for supporting a door that is displaced in an opening and closing direction by a drive force from an opening and closing drive mechanism, the door suspension device comprising:
a driving-side member which is displaceable in the opening and closing direction by the drive force from the opening and closing drive mechanism;
a hanger which supports the door;
an elastic member which is configured to displace the hanger in the opening and closing direction in conjunction with a displacement of the driving-side member and which allows relative displacements of the driving-side member and the hanger in the opening and closing direction by elastically deforming in accordance with a load in the opening and closing direction that acts between the driving-side member and the hanger; and
an adjustment bolt for adjusting an initial value of the load that acts between the driving-side member and the hanger, the initial value of the load being a load when the elastic member starts deforming,
wherein the adjustment bolt is positioned so that an axial force acting on the adjustment bolt by an elastic repulsive force of the elastic member can be received by the hanger.

2. The door suspension device according to claim 1 , further comprising;
a pressing mechanism which presses a door roller that guides a movement of the hanger in the opening and closing direction against a rail when the load that acts between the driving-side member and the hanger is equal to or larger than a threshold.

3. The door suspension device according to claim 1 , wherein:
the adjustment bolt is screw joined to the driving-side member,
the driving-side member includes a female screw section, and
a male screw section of the adjustment bolt is joined to the female screw section on the driving-side member.

4. The door suspension device according to claim 1 , wherein:
the elastic member and the adjustment bolt extend in the opening and closing direction, and
a central axial line of the elastic member and a central axial line of the adjustment bolt are mutually offset.

5. The door suspension device according to claim 1 , wherein:
the driving-side member and the elastic member are aligned in the opening and closing direction.

6. The door suspension device according to claim 1 , wherein:
the elastic member includes a coil spring, and
the door suspension device further comprises a spring guiding member which is in the coil spring and which guides an extension or contraction operation of the coil spring.

7. The door suspension device according to claim 6 , wherein:
the spring guiding member is configured to be displaceable in the opening and closing direction in conjunction with the hanger,
the door suspension device further comprises door roller brackets which support a door roller capable of coming into contact with a rail,
the door roller brackets are a pair in the opening and closing direction, and
the spring guiding member couples the pair of door roller brackets to each other.

8. The door suspension device according to claim 1 , wherein:
the hanger includes a notched section on the hanger, and
an edge of the notched section is configured to receive the adjustment bolt.

9. The door suspension device according to claim 1 , further comprising:
a position adjusting mechanism for adjusting a position of the hanger with respect to the opening and closing drive mechanism in the opening and closing direction.

10. The door suspension device according to claim 9 , wherein:
the driving-side member includes a first member which receives the drive force from the opening and closing drive mechanism, and a second member which is a separate member from the first member and which is coupled to the hanger, and
the position adjusting mechanism is capable of adjusting relative positions of the first member and the second member in the opening and closing direction.

11. The door suspension device according to claim 10 , wherein:
the adjustment bolt is a first adjustment bolt,
the position adjusting mechanism includes a second adjustment bolt which couples a first receiving section on the first member and a second receiving section on the second member to each other, and
the second adjustment bolt is screw joined to at least one of the first receiving section and the second receiving section.

12. The door suspension device according to claim 11 , wherein:
a position of the first adjustment bolt and a position of the second adjustment bolt are offset in at least one of a vertical direction of the door suspension device and the opening and closing direction.

13. The door suspension device according to claim 12 , wherein:
the position of the second adjustment bolt is higher than the position of the first adjustment bolt in the vertical direction of the door suspension device.

Assignees

• Nabtesco Corp

Inventors

• Takayama Yuki

Classifications

• E05F15/60 Primary

  using electrical actuators · CPC title

• E05F15/632

  for horizontally-sliding wings · CPC title

• E05D15/0643

  on balls or floating rollers · CPC title

• E05D15/0626 Primary

  for wings suspended at the top · CPC title

• E05D13/12

  with springs · CPC title