Operator cab for heavy construction equipment

Abstract

An operator cab for heavy construction equipment is disclosed to prevent a sliding door from rocking or rattling due to a shock or vibration applied to the cab in a state that the sliding door slidably mounted on the cab is opened or closed. The operator cab includes a sidewall member with a doorway, upper, central, and lower rails provided on upper, central, and lower portions of the sidewall member, respectively, a sliding door slid by upper, central, and lower rollers engaged with the upper, central, and lower rails, respectively, to open or close the doorway, upper and lower roller holders installed on ends of the upper and lower rails, respectively, in a shape corresponding to the upper and lower rollers, and having an engaging groove receiving and supporting the upper and lower rollers when the sliding door is fully opened or closed, a locking device having a pair of male and female locking strikers which are engaged to each other at one side of the sliding door when the sliding door is fully opened, and a locking holder formed on an external periphery of a loader corresponding to the male locking striker.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims priority to Korean Patent Application No. 10-2006-23076 filed on March 13, 2006 and Korean Patent Application No. 10-2006-29019 filed on March 30, 2006, respectively, both of which The disclosures in both applications are incorporated by reference in this application in their entirety. technical field [0003] The present invention relates to a cab for a heavy construction machine capable of preventing the sliding door from being damaged due to shock or vibration applied to the cab in a state where the sliding door slidably mounted on the cab is opened or closed. Wobble or rattle and improve the durability and shock absorption of the locking device and lock retainer. [0004] More particularly, the present invention relates to a cab for a heavy construction machine in which rollers accommodated in engaging grooves are guided by guide rails installed on rollers for supporting the s...

AI Technical Summary

Problems solved by technology

[0021] As a result, the disadvantage of the existing door lock device is that one side of the front end of the door lock holder is worn, so that the door lock holder is severely worn unevenly, thereby reducing the lifespan.

[0022] Also, when locking the sliding door, there is a lot of noise and vibration due to the impact of the head of the loader hitting the bottom of the fixed element 21

Specifically, when the front end of the lock retainer is unevenly worn, a void or gap is generated at the joint portion between the housing and the lock retainer, thereby making the locked state of the door unstable and reducing the Ability to absorb noise and vibration

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