Mounting frame for displacing and fixing in a shaft, comprising - a main frame, - a first primary fixing component (46a, 46c) for supporting the mounting frame on a first shaft wall during fixing of the mounting frame in the shaft and - a secondary fixing component for supporting the mounting frame on a second shaft wall of the shaft opposite the first shaft wall in a fixing direction during fixing of the mounting frame in the shaft, - the first primary fixing component (46a, 46c) and the secondary fixing component being arranged on the main frame, wherein - the first primary fixing component (46a, 46c) and/or the main frame can assume a transport position and a working position, a change of the first primary fixing component (46a, 46c) and/or the main frame from its working position to its transport position leading to a reduction in an extension of the mounting frame in an extension direction that differs from the fixing direction, and the first primary fixing component (46a, 46c) has an arm and a first primary contact element (55a, 55c) arranged on the arm, the arm, in the working position of the first primary fixing component (46a, 46c), extending away from the main frame in the extension direction, and at least part of the arm being displaced toward the main frame for a change of the first primary fixing component (46a, 46c) from the working position to the transport position, characterized in that a second primary fixing component comprising a second primary contact element for supporting the mounting frame on the first shaft wall during fixing of the mounting frame in the shaft, which component is thus immovably arranged on the main frame such that no part of the second primary fixing component projects beyond the main frame in the extension direction. - a main frame, - a first primary fixing component (46a, 46c) for supporting the mounting frame on a first shaft wall during fixing of the mounting frame in the shaft and - a secondary fixing component for supporting the mounting frame on a second shaft wall of the shaft opposite the first shaft wall in a fixing direction during fixing of the mounting frame in the shaft, - the first primary fixing component (46a, 46c) and the secondary fixing component being arranged on the main frame, wherein - the first primary fixing component (46a, 46c) and/or the main frame can assume a transport position and a working position, a change of the first primary fixing component (46a, 46c) and/or the main frame from its working position to its transport position leading to a reduction in an extension of the mounting frame in an extension direction that differs from the fixing direction, and the first primary fixing component (46a, 46c) has an arm and a first primary contact element (55a, 55c) arranged on the arm, the arm, in the working position of the first primary fixing component (46a, 46c), extending away from the main frame in the extension direction, and at least part of the arm being displaced toward the main frame for a change of the first primary fixing component (46a, 46c) from the working position to the transport position, characterized in that a second primary fixing component comprising a second primary contact element for supporting the mounting frame on the first shaft wall during fixing of the mounting frame in the shaft, which component is thus immovably arranged on the main frame such that no part of the second primary fixing component projects beyond the main frame in the extension direction.