CAB FRAME STRUCTURE FOR CONSTRUCTION MACHINE

• US 20130119708A1
• Filed: 07/21/2011
• Published: 05/16/2013
• Est. Priority Date: 07/29/2010
• Status: Active Grant

• Current Assignee: Press Kogyo Company Limited
• Original Assignee: Press Kogyo Company Limited
• Inventors: Kondo, Shigeki, Sato, Masanori
• Granted Patent: US 8,876,196 B2
• Time in Patent Office: Days
• US Class Current: 296/190.1
• CPC Class Codes: B60J 1/004 Mounting of windows
• CPC Class Codes: E02F 9/16 Cabins, platforms, or the like, for drivers for motor vehicles in general B62D33/06, for cranes B66C13/54
• CPC Class Codes: E02F 9/163 Structures to protect drivers, e.g. cabins, doors for cabins; Falling object protection structure [FOPS]; Roll over protection structure [ROPS] for handrails mounted on cabins E02F9/0833 takes precedence; for vehicles in general B60R21/11, B60R21/13, for fork-lift trucks B66F9/07545

Abstract

Summary

Object

In a cab frame structure for a construction machine in which a front pillar and a roof pillar are configured by one tubular material, the cab frame structure for the construction machine in which an attachment position of a front header can be reversibly raised and an upward viewing angle of a driver is enlarged is provided.

Solving Means

A front pillar 1 and a roof pillar 2, which constitute a cab frame of the construction machine, are configured by one tubular material 9 having a curved portion 10 at a joint between them, and by making a curvature radius of a curve outer side 10a in the curved portion 10 smaller than a curvature radius of a curve inner side 10b, a space 12 to raise an accommodation position of a top end 7x of a front window unit 7 is formed in the curved portion 10. A front header 4 is arranged at the position of the top end 7x of the front window unit 7 accommodated in the space 12. With this configuration, the attachment of the front header 4 can be reversibly raised, and an upward viewing angle θ2 of a driver can be expanded.

Claims

1-6. -6. (canceled)

7. A cab frame structure for a construction machine, characterized in that,

a front pillar and a roof pillar, which configure a cab frame of the construction machine, are configured by one tubular material having a curved portion at a joint between the front pillar and the roof pillar;

by making a curvature radius of a curve outer side in said curved portion in said tubular material smaller than a curvature radius of a curve inner side, a space to raise an accommodation position of a top end of a front window unit supported by said front pillars is formed in said curved portion; and

a front header, which is positioned at the top end of said front window unit accommodated in said space, is arranged in the curve outer side in said curved portion.

8. The cab frame structure for the construction machine as claimed in claim 7, wherein said tubular material has surplus portions in a circumferential direction at a portion of the front pillar and a portion of the roof pillar and has a protrusion protruded to the curve outer side in said curved portion, and a section is gradually changed along a longitudinal direction.

9. The cab frame structure for the construction machine as claimed in claim 7, wherein in said tubular material, a circumferential length of the portion of said front pillar, a circumferential length of the portion of said roof pillar and a circumferential length of said curved portion are equal.

10. The cab frame structure for the construction machine as claimed in claim 8, wherein in said tubular material, a circumferential length of the portion of said front pillar, a circumferential length of the portion of said roof pillar and a circumferential length of said curved portion are equal.

11. The cab frame structure for the construction machine as claimed in claim 7, wherein said front window unit has a member to be guided which is engaged with a guide rail placed in said tubular material, and can be moved along said tubular material.

12. The cab frame structure for the construction machine as claimed in claim 8, wherein said front window unit has a member to be guided which is engaged with a guide rail placed in said tubular material, and can be moved along said tubular material.

13. The cab frame structure for the construction machine as claimed in claim 9, wherein said front window unit has a member to be guided which is engaged with a guide rail placed in said tubular material, and can be moved along said tubular material.

14. The cab frame structure for the construction machine as claimed in claim 10, wherein said front window unit has a member to be guided which is engaged with a guide rail placed in said tubular material, and can be moved along said tubular material.

15. The cab frame structure for the construction machine as claimed in claim 12, wherein said guide rail is formed in said surplus portion.

16. The cab frame structure for the construction machine as claimed in claim 7, wherein said front window unit has a flat glass.

17. The cab frame structure for the construction machine as claimed in claim 8, wherein said front window unit has a flat glass.

18. The cab frame structure for the construction machine as claimed in claim 9, wherein said front window unit has a flat glass.

19. The cab frame structure for the construction machine as claimed in claim 10, wherein said front window unit has a flat glass.

20. The cab frame structure for the construction machine as claimed in claim 11, wherein said front window unit has a flat glass.

21. The cab frame structure for the construction machine as claimed in claim 12, wherein said front window unit has a flat glass.

22. The cab frame structure for the construction machine as claimed in claim 13, wherein said front window unit has a flat glass.

23. The cab frame structure for the construction machine as claimed in claim 14, wherein said front window unit has a flat glass.

24. The cab frame structure for the construction machine as claimed in claim 15, wherein said front window unit has a flat glass.