JPH0571516B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a block gripping device for constructing a retaining wall such as a retaining wall.

``Conventional technology'' An analysis of the block stacking work in the construction of conventional retaining walls shows that the time required to transport the blocks accounts for 20 to 30% of the total work. In this block transportation work, two workers load the blocks that have been collected at the base by truck into the bucket of a power shovel, and these workers move with the power shovel to the block loading site, and then follow the instructions of the mason. In practice, blocks were temporarily placed in designated locations from inside the bucket.

With the conventional methods described above, it takes a lot of effort to move and transport the blocks, and the workers are not only forced to do hard labor while sitting on their knees, but also because the footing is poor and they have to handle heavy objects, which can lead to their hands and feet being pinched. There were problems such as accidents such as these being easy to occur and being dangerous.

Furthermore, in recent years the masonry workforce has been aging, making it difficult to secure skilled workers in the future.

By the way, in order to solve the above-mentioned problems in block stacking work, by mechanizing and automating the work, it is possible to free workers from heavy and dangerous work, and also to save labor and reduce the number of personnel. Conventionally, devices have been developed that can reduce costs.

[Problems to be Solved by the Invention] However, when the block is transported using a block gripping device, the block has uneven surfaces, variations in dimensions, and the block is quite heavy, so it is difficult to grip the block. If it was not enough, there was a risk that the block would slip or fall, causing a serious accident.
There were also problems such as poor work efficiency.

The present invention was made to solve these conventional problems, and an object of the present invention is to provide a gripping device that can grip blocks safely and reliably and improve work efficiency. It is something.

[Means for Solving the Problems] The block gripping device of the present invention is provided with a fixed side frame of an arm of a base machine such as a power shovel, and a movable side frame is attached to the fixed side frame via a reciprocating means such as a hydraulic cylinder. A backing plate that contacts the front side of the block is attached to the fixed side frame, and a holding plate that presses the back side of the block is attached to the movable side frame. In the device which releases the block while retracting the block, the above-mentioned backing plate is made long enough to grip a plurality of blocks at the same time, and is pivoted to the stationary frame in a substantially vertical state via a horizontal pin. The presser plate is provided so as to be able to rotate slightly in the vertical direction, and the presser plate is divided into a plurality of pieces, and the presser plate is pivoted to the movable frame via an inclined pin inclined downward in the direction approaching the cover plate. The plate is provided so as to be able to rotate slightly in the lateral direction while maintaining a taper that tapers downward relative to the abutment plate, and furthermore, a fall prevention lever is pivotally attached to the side of the fixed side frame for gripping. The invention is characterized in that the block is held so that it does not tilt sideways and fall.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a stationary side frame, which is designed to be detachably attached to an arm of a base machine such as a power shovel, as will be described later.

A backing plate 3 is attached to the inside of the fixed side frame 1 via a horizontal pin 2. Applicable board 3
is designed to be able to rotate slightly around a horizontal pin 2, so that it can be adjusted according to irregularities on the surface of block B and variations in size. Further, a non-slip plate 4 made of a rubber plate is attached to the surface of the backing plate 3 to prevent the block B from slipping.

A telescopic drive means 5 consisting of a hydraulic cylinder or the like is attached to the upper part of the fixed frame 1, and is configured to reciprocate the movable frame 6 as shown by the arrow. A press plate 8 is also attached to the inside of the movable frame 6 (on the fixed frame side) via an inclined pin 7. The holding plate 8 is designed to be able to rotate slightly in the lateral direction about the pin 7, so that it can be pressed in response to variations in the dimensions of the blocks B. Further, the inclined pin 7 is inclined in a direction in which its lower side approaches the block B, and the presser plate 8, which is pivotally connected to the pin 7, is tapered so that its lower side narrows between it and the backing plate 3. is formed to prevent block B from falling. Incidentally, even if the backing plate 3 is rotated to the maximum angle of inclination, the downward taper is ensured, so the block B will never fall.

Further, an anti-slip plate 9 such as a rubber plate is attached to the front surface of the presser plate 8 to prevent the block B from slipping.

As is clear from FIG. 2, in this embodiment, the presser plate 8 is divided into three pieces so that five blocks B can be gripped at the same time.
are adapted to hold down two blocks B each, and the holding plate 8 in the center holds down one block B in the middle.

In FIG. 1, reference numeral 10 denotes a drop-off prevention lever, which is pivotally attached to the side of the fixed frame 1, and is adapted to rotate between a solid line state and a virtual line state. A torsion spring 11 is attached to the drop-off prevention lever 10, and elastically biases the lever 10 in the direction of the solid line position.

Next, the operation of the apparatus of the above embodiment will be explained.

First, the gripping device is attached to the arm 13 of a base machine 12 such as a power shovel as shown in FIG. 4 via a hydraulic cylinder 14 or the like.

Next, the base machine 12 is moved to the block collection location, and the backing plate 3 is placed on the front side of the aligned blocks B as shown in FIG. Adjust the orientation of the gripping device.

Subsequently, the movable frame 6 is lowered to a retracted state (the state shown by the imaginary line in FIGS. 1 and 3).
When the gripping device is lowered, the drop-off prevention lever 15 resists the torsion spring 11 and pushes against the adjacent non-grip block.
It moves backward while touching B′.

When the backing plate 3 and the holding plate 8 are lowered to the front and back positions of the block B, the telescopic drive means 5 is operated to move the movable side frame 6 in the gripping direction (toward the fixed side frame), and the front side of the block B is moved to the backing plate 3. and the rear surface is pressed against the presser plate 8, respectively.

The irregularities on the surface of block B and the variations in dimensions are
The backing plate 3 and the holding plate 8 follow this and rotate slightly to securely grip the object.

Next, when the gripping device is raised by arm 13 and block B is lifted, the adjacent block
The fall prevention lever 10, which had been in elastic contact with the upper side of B', returns to the horizontal state and is positioned to the side of the block B being gripped, and holds the block B so that it does not tilt sideways and fall. .

Next, the base machine 12 is moved to the installation site, and the movable frame 6 is opened as shown in FIG. 4 with the block B being held facing the correct direction.

When the movable frame 6 opens and the presser plate 8 retreats, the block B is released so as to fall backward as shown in FIG. At this time, fixed side frame 1
Since the backing plate 3 is fixed as it is and does not move, the block B will never roll down to the outside of the wall surface when the block B is opened, and it can be temporarily placed extremely safely.

Once the block B is temporarily placed, the arm 13 is raised to move the gripping device upward, and the block is returned to the block collection location to repeat the above operation.

[Effects of the Invention] (1) The backing plate is pivoted to the stationary frame via a horizontal pin in a substantially vertical state so as to be able to rotate slightly in the vertical direction, and the holding plate is attached to the backing plate. Pivotally connected to the movable frame by an inclined pin inclined downward in the approaching direction, the presser plate can be slightly rotated in the lateral direction while maintaining a taper such that the lower part narrows with respect to the abutment plate. Because of this, it is possible to press in all directions, up, down, left and right, depending on the irregularities and dimensions of the block, and even if the backing plate and holding plate are rotated for pressing, it will not move downward. The fully tapered state is maintained and the block can be gripped very safely and securely.

(2) The length of the backing plate is such that it can hold multiple blocks at the same time, and the holding plate is divided into multiple pieces, so it is possible to grip multiple blocks at the same time.
The work efficiency of block-laying work can be greatly improved.

(3) A drop-off prevention lever is pivotally attached to the side of the fixed frame to prevent the gripped block from tilting to the side and falling.
High safety can be maintained even when the block rotates around the gripping direction or when a plurality of gripped blocks are disturbed due to vibration or the like.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the block gripping device of the present invention, Fig. 2 is a perspective view showing the movable side frame and the divided push plate, and Fig. 3 shows the gripping action at the block collection site. The explanatory diagram, FIG. 4, is an explanatory diagram showing the state of temporary placement work at the block installation location. 1...Fixed side frame, 2...Horizontal pin, 3...
... Backing plate, 4 ... Anti-slip plate, 5 ... Telescopic drive means, 6 ... Movable side frame, 7 ... Inclined pin, 8
... Pressing plate, 9 ... Anti-slip plate, 10 ... Fall prevention lever, 11 ... Torsion spring, 12 ... Base machine, 13 ... Arm, B ... Block.

Claims (1)

[Claims] 1. A fixed side frame is attached to the arm of a base machine such as a power shovel, and a movable side frame is attached to the fixed side frame via a reciprocating means such as a hydraulic cylinder. In the device, a plate is attached, and a presser plate is attached to the movable side frame to press the back side of the block, and the block is released by retracting the presser plate with the presser plate fixed, The above patch plate,
The length is such that it can hold multiple blocks at the same time, and it is pivoted almost vertically to the stationary frame via a horizontal pin so that it can rotate slightly in the vertical direction. At the same time, it is pivoted to the movable frame via an inclined pin tilted downward in the direction approaching the said backing plate, so that the holding plate maintains a taper in which the lower part narrows with respect to the said backing plate, and the horizontal direction The block is provided so that it can be rotated slightly, and furthermore, a fall prevention lever is pivotally attached to the side of the fixed side frame to hold the block so that the gripped block does not tilt to the side and fall. Block gripping device.