JP3949649B2 - Heavy lifting jig - Google Patents

Description

  The present invention relates to a lifting jig for lifting a heavy object such as a stone, and particularly to facilitating lifting in a narrow place.

  For example, a large apparatus such as a forklift is used to lift and move heavy objects such as stone. Further, in a working environment where such a large apparatus cannot be used, as shown in FIG. 4, the tip of the bar 11 formed of a straight steel rod is inserted under the stone 7, for example, and the other end of the bar 11 is inserted. The worker holds the part and applies force F, rotates it around the fulcrum member 9 and uses it as a lever, lifts one end of the stone 7 and moves it, or multiple workers lift the stone 7 To move.

  When the bar 11 formed of a steel bar is used as a lever in this way, the distance from the fulcrum of the bar 11 to the holding position where the operator applies force F is greater than the distance from the fulcrum to the tip of the stone 7. By making it much larger, the stone can be lifted with a small force F. When the stone 7 is lifted, the tip of the straight bar 11 is inserted into the lower part of the stone 7, so that it is necessary to insert the bar 11 at an angle close to horizontal. Further, when the bar 11 is rotated downward to lift the stone 7, the bar 11 rotates to an angle closer to the horizontal, so that the stone 7 to be lifted is sufficiently separated from the adjacent stone and other members. The stone 11 can be lifted by the bar 11, but when the distance between the stone 7 to be lifted and the adjacent stone or other members is narrow, the stone 11 cannot be lifted by the bar 11, and a plurality of workers can I had to lift 7.

  When a heavy object such as stone is lifted by a plurality of workers in such a narrow place, there is a risk that the work is not easy and injuries occur.

  An object of the present invention is to provide a heavy article lifting jig that can easily lift a heavy article such as a stone or the like arranged in a narrow place or at a narrow interval by one operator to improve such disadvantages. Is.

The heavy article lifting jig of the present invention has a fork at one end of the arm body and a holding part at the other end, and the fork is at an angle of approximately 90 degrees with respect to the arm body. The holding portion has a lifting arm made of a steel material which is provided at an angle of about 90 degrees on the opposite side of the fork with respect to the arm main body and is formed in a substantially S shape, and has a narrow interval. When lifting a heavy object with a large size, the lifting arms are connected in parallel by a plurality of detachable connecting members at a predetermined interval, and a heavy object with a small size is held. When lifting, the connection of the lifting arm by the connecting member is released.

  In the heavy lifting tool of the present invention, since the fork and the holding portion are bent to the opposite side at an angle of about 90 degrees with respect to the arm body, the distance between the heavy object such as a stone to be lifted and another heavy object is Even if it is narrow, the tip of the fork can be easily inserted between the ground and the lower end of the stone to be lifted, and the arm main body can be disposed substantially perpendicular to the ground.

  Also, when lifting a heavy object, the arm body is arranged substantially perpendicular to the ground at the initial position, so when the heavy object lifting jig is rotated to lift the heavy object to a predetermined position, the arm body The angle with respect to the vertical direction with respect to the ground can be reduced, and the heavy object can be reliably lifted even if the distance between the heavy object to be lifted and another heavy object or member is narrow.

FIG. 1 is a perspective view showing the configuration of the heavy article lifting jig of the present invention. As shown in the figure, in the heavy lifting jig 1, a pair of lifting arms 2 made of steel are connected in parallel by a plurality of connecting members 3 at a predetermined interval. Each lifting arm 2 has a fork 5 at one end of the arm body 4 and a holding portion 6 at the other end. The fork 5 is provided at an angle of approximately 90 degrees with respect to the arm body 4, the holding portion 6 is provided at an angle of approximately 90 degrees on the opposite side of the arm body 4 from the fork 5, and the lifting arm 2 is approximately S. It is formed in a letter shape.

  For example, when the heavy material lifting jig 1 lifts a stone 7 which is a heavy object placed on the ground, as shown in FIG. 2A, one lower end portion of the ground 8 and the stone 7 to be lifted. In between, the front-end | tip part of the fork 5 provided in each arm 2 front-end | tip of the heavy load lifting jig 1 is inserted, and the rigid fulcrum member 9 is arrange | positioned on the ground 8 on the opposite side to the stone material 7 which each arm 2 lifts. When the tip of the fork 5 is inserted between the ground 8 and the lower end of one of the stones 7 to be lifted, the fork 5 and the holding part 6 are bent to the opposite side with respect to the arm body 4 at an angle of approximately 90 degrees. As shown in FIG. 2 (a), even if the distance between the stone material 7 to be lifted and the other stone material 7 is narrow, the tip of the fork 5 is easily placed between the ground 8 and the lower end portion of the stone material 7 to be lifted. The arm body 4 can be inserted substantially vertically with respect to the ground surface 8.

  In this state, as shown in FIG. 2 (b), the holding portion 6 of each arm 2 of the heavy load lifting jig 1 is held, and the heavy lifting jig 1 is held around the fulcrum member 9 as the holding portion 6. Rotate down. When the holding part 6 is rotated downward, one end of the stone 7 is lifted by the action of the insulator. When the stone material 7 is lifted, the arm body 4 is arranged substantially perpendicular to the ground at the initial position. Therefore, when the heavy material lifting jig 1 is rotated to lift the stone material 7 to a predetermined position, the arm The angle of the main body 4 with respect to the direction perpendicular to the ground 8 can be reduced, and the stone 7 can be reliably lifted even if the distance between the stone 7a to be lifted and the other stone 7 is small. Therefore, the stone 7 can be easily lifted by one operator operating the heavy load lifting jig 1.

  In the above description, the case where the pair of arms 2 is provided in the heavy load lifting jig 1 has been described. However, when lifting a small stone 7, the heavy load lifting jig 1 having one arm 2 is used. May be used. Therefore, as shown in FIG. 3, the pair of arms 2 and the plurality of connecting members 3 may be detachable with bolts 10.

It is a perspective view which shows the structure of a heavy article lifting jig. It is a side view which shows the lifting operation | work by a heavy load lifting jig. It is a perspective view which shows the other structure of a heavy article lifting jig. It is a side view which shows the lifting upper body by a bar.

Explanation of symbols

1; heavy load lifting jig, 2; arm, 3; connecting member, 4; arm body, 5; fork,
6; holding part, 7; stone, 8; ground, 9; fulcrum member, 10; bolt.

Claims (1)

The arm body has a fork at one end and a holding portion at the other end, and the fork is provided at an angle of approximately 90 degrees with respect to the arm body. A heavy object having a lifting arm made of a steel material that is provided at an angle of about 90 degrees on the opposite side of the main body from the fork and that is formed in a substantially S-shape, and that is arranged with a small interval. When lifting, the lifting arms are connected in parallel by a plurality of detachable connecting members at a certain interval in parallel, and when lifting a heavy object with a small interval and a small size, A heavy lifting jig characterized by releasing the connection.

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