Method pertaining to a rock bolting configuration, a rock bolting configuration, a vehicle comprising a rock bolting configuration and a computer program product

1. A method pertaining to a bolting configuration ( 299 ), wherein a drilling unit and a bolting unit are arranged to be supported by a bottom carriage ( 330 ) via a respective top carriage ( 271 ; 272 ), wherein said bottom carriage ( 330 ) is arranged to be supported by a feed beam ( 230 ), relative to which said bottom carriage ( 330 ) is displaceable, wherein said top carriages ( 271 ; 272 ) are arranged to alternately be supported by said bottom carriage ( 330 ) to alternately be brought into operative engagement and thereby alternately be locked relative to said bottom carriage ( 330 ),

wherein the steps of said method comprise:

controllably bringing a locking configuration ( 350 ; 351 ) comprising at least one hydraulically, pneumatically or electrically controlled, axially displaceably arranged locking pin ( 350 ) adapted to be inserted into a locking hole ( 351 ) during locking, wherein said locking pin ( 350 ) is supported by said one top carriage ( 271 ; 272 ) and said locking hole ( 351 ) is arranged in said bottom carriage ( 330 ), or vice versa, to a position corresponding to an unlocked state;

by means of a switching configuration ( 360 ) switching top carriages ( 271 ; 272 ) at said bottom carriage ( 330 ), such that the other top carriage ( 271 ; 272 ) can be brought into active engagement with said bottom carriage ( 330 ); and

controllably bringing said at least one locking pin ( 350 ) to a position corresponding to a locked condition, wherein said locking pin ( 350 ) is inserted into said locking hole ( 351 ).

2. The method according to claim 1 , wherein said locking configuration ( 350 ; 351 ) is controlled, such that locking is performed by four locking pins ( 350 ) and four locking holes ( 351 ).

3. The method according to claim 2 , further comprising the step of:

said units alternately being brought into operative engagement by means of said switching configuration ( 360 ), comprising switching cylinder means ( 360 ) supported by the feed beam ( 230 ).

4. The method according to claim 1 , further comprising the step of:

said units alternately being brought into operative engagement by means of said switching configuration ( 360 ), comprising switching cylinder means ( 360 ) supported by the feed beam ( 230 ).

5. The method according to claim 1 , further comprising the step of:

controlling said switching and/or said locking steps by an operator.

6. The method according to claim 1 , further comprising the step of:

displacing said at least one locking pin ( 350 ) towards and away from said locking hole ( 351 ) by means of a hydraulic cylinder ( 360 ) supported by said top carriage ( 271 ; 272 ).

7. The method according to claim 1 , further comprising the step of:

displacing said at least one locking pin ( 350 ) in a longitudinal direction of said feed beam ( 230 ).

8. A bolting configuration ( 299 ) comprising a drilling unit and a bolting unit, which units are arranged to be supported by a bottom carriage ( 330 ) via a respective top carriage ( 271 ; 272 ), wherein said bottom carriage ( 330 ) is arranged to be supported by a feed beam ( 230 ), relative to which said bottom carriage ( 330 ) is displaceable, wherein said top carriages ( 271 ; 272 ) are arranged to alternately be supported by said bottom carriage ( 330 ) to alternately be brought into operative engagement and thereby alternately be locked relative to said bottom carriage ( 330 ),

wherein:

a locking configuration ( 350 ; 351 ) for said locking, which locking configuration comprises at least one hydraulically, pneumatically or electrically controlled, axially displaceably arranged locking pin ( 350 ) adapted to be inserted into a locking hole ( 351 ) during locking, wherein said locking pin ( 350 ) is supported by said one top carriage ( 271 ; 272 ) and said locking hole ( 351 ) is arranged in said bottom carriage ( 330 ), or vice versa.

9. The bolting configuration according to claim 8 , wherein said locking configuration comprises four locking pins ( 351 ) and four locking holes ( 35 ).

10. The bolting configuration according to claim 9 , further comprising:

means ( 200 ; 210 ; 900 ; 360 ) for alternately bringing said units into operative engagement.

11. The bolting configuration according to claim 9 , further comprising:

actuator means connected to control means ( 200 ; 210 ; 900 ), wherein said control means ( 200 ; 210 ; 900 ) are arranged to control said switching and/or said locking based on control signals from said actuator means.

12. The bolting configuration according to claim 9 , wherein said at least one locking pin ( 350 ) is arranged displaceably towards and away from said locking hole ( 351 ) by means of an hydraulic cylinder ( 360 ) supported by said top carriage ( 271 ; 272 ).

13. The bolting configuration according to claim 8 , further comprising:

means ( 200 ; 210 ; 900 ; 360 ) for alternately bringing said units into operative engagement.

14. The bolting configuration according to claim 8 , further comprising:

actuator means connected to control means ( 200 ; 210 ; 900 ), wherein said control means ( 200 ; 210 ; 900 ) are arranged to control said switching and/or said locking based on control signals from said actuator means.

15. The bolting configuration according to claim 8 , wherein said at least one locking pin ( 350 ) is arranged displaceably towards and away from said locking hole ( 351 ) by means of an hydraulic cylinder ( 360 ) supported by said top carriage ( 271 ; 272 ).

16. The bolting configuration according to claim 8 , wherein said at least one locking pin ( 350 ) is arranged displaceably in a longitudinal direction of said feed beam ( 230 ).

17. A vehicle ( 100 ) comprising a bolting configuration ( 299 ) according to claim 8 .

18. The vehicle according to claim 17 , said vehicle being a drilling rig.