Belt end connection for fastening a belt end in an elevator installation, and method for protecting and checking a belt end connection in an elevator installation

• US 7,469,774 B2
• Filed: 08/31/2005
• Issued: 12/30/2008
• Est. Priority Date: 09/13/2004
• Status: Active Grant

• Current Assignee: Inventio AG (Schindler Holding AG)
• Original Assignee: Inventio AG (Schindler Holding AG)
• Inventors: Ach, Ernst
• Primary Examiner(s): Crawford; Gene O.
• Assistant Examiner(s): Kruer; Stefan
• Application Number:
  US11/216,400
• Publication Number:
  US 20060054468A1
• Time in Patent Office: 1,217 Days
• Field of Search: 187/251, 187/407, 187/411, 187/412, 187/414, 241/30, 241/15.M, 241/36.L, 241/36.R, 241/226
• US Class Current: 187/411
• CPC Class Codes: B66B 7/085 Belt termination devices
• CPC Class Codes: Y10T 24/3909 Plural-strand cord or rope
• CPC Class Codes: Y10T 24/3969 Sliding part or wedge
• CPC Class Codes: Y10T 24/3971 Rope looped about movable member
• CPC Class Codes: Y10T 24/3996 Sliding wedge

Abstract

A belt end connection for fastening a support belt end in an elevator installation and a method for protecting and checking a belt end connection in an elevator installation includes a twisting prevention device that prevents twisting of the belt end connection about the longitudinal axis thereof. A wedge retains the support belt end in a wedge pocket and is secured by a loss prevention device against slipping out of the wedge pocket. The twisting prevention device and/or the loss prevention enable efficient protection of the support belt and/or of the belt end connection against damage and make possible efficient checking and control of the belt end connection.

Claims

1. A method of protecting a belt end connection used for fastening an end of a support belt in an elevator installation, the end of the support belt being fastened to one of an elevator car suspension point, a counterweight suspension point and a shaft suspension point, and the support belt, including the end of the support belt, being aligned in a substantially vertical direction and being arranged in parallel with at least another support belt, comprising the steps of:

a. attaching a belt end connection to the end of the support belt;

b. attaching a twisting prevention device to the support belt adjacent the belt end connection;

c. preventing twisting of the belt end connection and the support belt about a longitudinal axis thereof by attaching the twisting prevention device to one of the another support belt adjacent another belt end connection attached to the another belt and a part of the elevator installation; and

d. checking for an unequal tensile stress in the support belts by observing a position of the twisting prevention device when the twisting prevention device is attached to the another support belt.

2. The method according to claim 1 including the steps of:

c. forming a wedge pocket in the belt end connection;

d. inserting the end of the support belt with a wedge in the wedge pocket; and

e. attaching a loss prevention device to the belt end connection to prevent the wedge from slipping out of the wedge pocket.

3. The method according to claim 1 including forming the twisting prevention device as a flat profile member having an area of contact with the support belt.

4. The method according to claim 1 including fastening the twisting prevention device between a load-bearing run and an idle run of the support belt.

5. The method according to claim 1 including fastening the twisting prevention device to the support belt with at least one cable connector fastening.

6. A method of fastening a belt end connection to an end of a support belt in an elevator installation comprising the steps of:

forming a wedge pocket in the belt end connection;

inserting the end of the support belt with a wedge in the wedge pocket;

providing a support bolt for transmission of a supporting force of the support belt from the belt end connection to one of a car, a counterweight and an elevator shaft;

attaching a loss prevention device to the belt end connection to prevent the wedge from slipping out of the wedge pocket wherein said loss prevention device is attached to the support bolt of said belt end connection with a support bolt securing means securing the support bolt against rotation; and

attaching a twisting prevention device to the belt adjacent the belt end connection and to another support belt and checking for an unequal tensile stress in the support belts by observing a position of the twisting prevention device.

7. The method according to claim 6 including forming the loss prevention device to control a seat of the wedge in the wedge pocket.