Counterweight fixing unit and construction machinery

Abstract

To provide a counterweight fixing unit that improves the work efficiency of a work for fixing a stack of counterweights to one another in a weight block.SOLUTION: In a counterweight fixing unit, through-holes are formed from the uppermost counterweight to the lowermost counterweight of a stack of counterweights of a weight block. An upper fixing portion of a fixing auxiliary member can be switched between a housed state and an extended state; and in a state in which the fixing auxiliary member is inserted in the through-holes, the upper fixing portion in the extended state can be brought into contact with the uppermost counterweight from above in a vertical direction. A lower fixing portion provided in the lowermost counterweight can be switched between a non-fixed state in which the fixing auxiliary member inserted in the through-holes is movable in the vertical direction and a fixed state in which movement of the fixing auxiliary member inserted in the through-holes is restricted.SELECTED DRAWING: Figure 2

Claims

1. A weight block in which multiple counterweights are stacked vertically, and through holes are formed that penetrate vertically from the top counterweight to the bottom counterweight, A fixing auxiliary member having an upper fixing portion that can be switched between a retracted state and an unfolded state, and which can be inserted into the through hole of the weight block, wherein when the upper fixing portion is in the unfolded state while inserted into the through hole, the upper fixing portion in the unfolded state can contact the uppermost counterweight from vertically above, A lower fixing portion provided on the lowest counterweight, which can be switched between an unfixed state that allows the fixing auxiliary member inserted through the through hole to move in the vertical direction, and a fixed state that restricts the movement of the fixing auxiliary member inserted through the through hole along the vertical direction, A counterweight fixing unit equipped with the following features.

2. The upper fixing portion comprises a pair of outer plates and an inner plate rotatably mounted between the pair of outer plates with respect to the pair of outer plates. The upper fixing portion switches between the stored state and the deployed state as the inner plate rotates. In the deployed state of the upper fixing portion, the inner plate protrudes from the pair of outer plates in a direction intersecting the longitudinal direction of the fixing auxiliary member. A counterweight fixing unit according to claim 1.

3. The lower fixing portion comprises a rotating member that can rotate in the circumferential direction of the through hole, and a locking member that can rotate together with the rotating member in the circumferential direction of the through hole and slide in a direction intersecting the vertical direction. The lower fixing portion switches between the unfixed state and the fixed state as the locking member slides. A counterweight fixing unit according to claim 1.

4. The aforementioned fixing auxiliary member includes a plurality of upper fixing parts as the upper fixing part, When the fixing auxiliary member is inserted through the through hole, one of the multiple upper fixing parts corresponding to the number of stages of the weight block becomes the deployed state and contacts the uppermost counterweight. A counterweight fixing unit according to claim 1.

5. A counterweight fixing unit according to any one of claims 1 to 4, The rotating body on which the weight block of the counterweight fixing unit is installed, A vehicle body to which the rotating body is connected from the vertically upper side, and which is capable of rotating the rotating body around a pivot axis along the vertical direction, A construction machine equipped with the following features.

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