JPH0120384Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is applicable to cases in which steel sheet piles are placed horizontally on the ground and then lifted vertically and transported to a predetermined location, or when they are lifted horizontally and moved horizontally. This relates to clamps used for such purposes.

(Prior art and problems) The gripping tools shown in Figs. 16 and 17 are used as gripping tools that use the load when lifting one end of a heavy object to increase the gripping force and safely transport it. It is being That is, what is shown in FIG. 16 includes a grip main body 103 having an insertion groove 102 for a lifted member 101, a receiving part 106 arranged along one side surface 104 of the insertion groove 102, and this receiving part 106. and a cam 108 having an arcuate sawtooth portion 107 that constitutes the gripping portion 105 and facing the cam 108. 108 and rotates the cam 108 about the shaft 109 in the direction in which the sawtooth section 107 protrudes toward the gripping section 105.
06 to grasp the lifted member 101 and lift it up and transfer it, that is, the hanging member 110
Lifted member 1 in the same direction as the lifting force applied to
This is for lifting 01. Furthermore, the one shown in FIG. 17 includes a grip main body 201 having an insertion groove 203 for a lifted member 202 and a cam 205 having an arcuate sawtooth portion 204, and is attached to a hanging member 208 connected to the cam 205. Cam 2
The sawtooth section 2 is converted into rotational force of 05 and rotates around the shaft 206.
The cam 205 moves in the direction in which the cam 04 protrudes toward the gripping portion 207.
By rotating the member 202, the member 202 to be lifted is grasped and hoisted in a horizontal state.

In all of these conventional gripping tools for lifting and transferring, the insertion groove that forms the gripping part is open at both ends of the cam in the axial direction and at one surface perpendicular to this, and the insertion groove is opened in the same direction as the rotation of the cam. The end of the member to be lifted must be inserted a considerable distance into the deeply formed insertion groove in order to be grasped. Therefore, as shown in FIG. 18, a plurality of steel sheet piles 301, 30
2, 303, 304 are stacked on the ground and placed horizontally, there is no gripping allowance for inserting the insertion part facing the cam of the gripping tool, and the uppermost steel sheet pile 30
When lifting the steel sheet pile 3, the end portion 301a of the steel sheet pile 3 located below the steel sheet pile 3 is manually lifted.
02 to insert the receiving part of the gripping tool, and using this gap to insert the steel sheet pile 301 into the insertion groove of the gripping tool, grasp it, and lift it up and transfer it, which requires a lot of labor. Requires.

In other words, it is desirable that the gripping tool for handling steel sheet piles has a receiving part facing the cam of the insertion groove that is thin and has a shape that adapts to the side edges of the steel sheet pile so that it can be easily gripped, and that it can be hung safely without fear of falling. It is necessary to raise it up, and if it is placed in a vertical position, it is convenient to be able to easily release it by remote control.

The present invention has been made for the purpose of solving the above-mentioned problems and providing a gripping device for lifting and transporting that can meet such requirements.

(Means for Solving the Problems) In the present invention, an insertion groove is formed between a receiving part and a cam facing the receiving part, and the cam is rotated by the lifting force applied to the hanging member. As a means for solving the problem of a lifting and transferring grip for steel sheet piles that cooperates with a receiving part to pinch the side edges of the steel sheet piles inserted into the insertion groove, the present invention provides a means for solving the problems of the gripping tool for lifting and transporting steel sheet piles that cooperates with the receiving part and clamps the side edges of the steel sheet piles inserted into the insertion groove. A plate material whose lower part is formed into a hook portion having a V-shaped end surface is fixed, and the insertion groove is formed between the lower edge of the regular board and the hook portion, and the upward surface of the hook portion is fixed. forms the receiving portion; the cam is fixed to a shaft that is disposed between the substrate and the plate material and is rotatably supported by the substrate and the plate material, and the hanging member is attached to the cam as a support shaft. The insertion groove is open at one surface in the axial direction of the cam and at both ends perpendicular thereto, and the insertion groove is connected to the upper end of the base plate on the open surface side in the axial direction and contacts the side surface of the steel sheet pile. A contact piece is provided to protrude in contact; a rotary plate is fixed to the shaft to which the cam is fixed, and the cam plate is pivotally attached to the rotary plate so as to be rotatable within a limited range; The cam plate is configured such that a spring biases the cam plate in the direction of protruding the cam plate into the insertion groove, and a cable that moves the cam plate in the direction of retracting the cam plate from the insertion groove is connected to the cam plate.

(Operation) Operate the cam plate to make the cam retract from the insertion groove, insert the side edge of the steel sheet pile into the insertion groove and make it contact the receiving part, then operate the cam plate to release the cam. The side edge of the steel sheet pile is inserted into the insertion groove in cooperation with the receiving part.

Next, when the hanging member is pulled up, the cam further rotates in the projecting direction and firmly grips the side edge of the steel sheet pile. When the cable is pulled, the cam rotates in the retracting direction via the cam plate and rotating plate, releasing the steel sheet pile.

(Example) Embodiments of the present invention will be described based on the drawings.

A plate material 2 having a hook portion 3 having a V-shaped end surface at the bottom is fixed by welding to a substantially U-shaped board 1 in the front-back direction in FIG. 1, with the hook portion 3 protruding downward; The upward inner surface of the hook 3 serves as a receiving portion 4 that forms a gripping portion 7 in cooperation with a rotating cam 9, which will be described later, and is located between the hook 3 and the lower edges 1c and 1d of the substrate 1. An insertion groove 6 is formed on the side edge of the steel sheet pile 5. A cam 9 having an arcuate sawtooth portion 8 formed on the outer circumferential surface facing the receiving portion 4 is disposed between the substrate 1 and the plate material 2.
0 so that the sawtooth portion 8 can protrude into the insertion groove 6. Further, the insertion groove 6 is open with open portions 11, 12, and 13 at one surface in the axial direction of the shaft 10 and at both ends perpendicular thereto.

Further, at a position facing the sawtooth portion 8 across the shaft 10 of the cam 9, there is a pair of plates 15a, 1 having a pulley 14 for connecting the cable at the top, as shown in FIG.
One end 1 of a forked hanging member 15 made of 5b
6a are connected by a support shaft 17. The other ends 16b of the plates 15a and 15b constituting this hanging member 15 are connected to each other by a connecting shaft 18, and this connecting shaft 18 fits into a groove 19 formed in the upper edge 9a of the cam 9, so that the cam 9 It functions to prevent rotation in the clockwise direction in FIG. The counterclockwise rotation of the cam 9 is regulated by a stop pin 20 provided on the plate 2.

The shaft 10 has two steps 2 as shown in FIGS.
1a and 21b, and the large-diameter base end inserted into the substrate 1 has a notch 22 into which the cam 9 is inserted.
However, threaded portions 24 into which nuts 25 are screwed are formed at the tips having a smaller diameter than the central portion 23 inserted through the plate material 2. Therefore, the cam 9 is
It is fixed to and rotates as one. Further, as shown in FIGS. 8 and 9, an egg-shaped rotary plate 26 is fitted into the threaded portion 24 protruding from the plate material 2 and fixed by a nut 25.

A cam plate 27 is pivotally attached to this rotary plate 26 by a shaft 28 at an eccentric position from the shaft 10 toward the bulging portion 26a, and stop pins 29a, 29b are held between the line L connecting the shafts 10 and 28. are protrudingly opposed to each other, and the cam plate 27 is formed with locking step portions 30a and 30b that engage with the stop pins 29a and 29b, respectively. The locking step portions 30a and 30b restrict the rotation of the cam plate 27 in the clockwise and counterclockwise directions, as shown in FIGS. 8 and 9. Furthermore, a locking protrusion 32 is protruded from the peripheral edge 31 of the cam plate 27 at a position opposite to the center of the locking steps 30a and 30b, sandwiching the shaft 28 therebetween. A handle 33 is protruded between the locking stepped portion 30a and the opposite side of the coiled spring 34 whose one end 34a is locked to a locking portion 35 attached to one side plate 1a of the board 1. One end 34b of is locked to the locking protrusion 32.

To use the gripping tool A having such a configuration, first pull the cable 36 connected to the handle 33 upward, and then move the cam plate 27 around the shaft 28 to release the spring 3.
Rotate it clockwise against the tension of 4 until the locking step 30a locks on the stop pin 29a (FIG. 9). At this time, since the axis of the spring 34 is located above the shaft 10, the rotary plate 26 is biased clockwise, and the cam 9 is rotated until the groove 19 fits into the connecting shaft 18 of the hanging member 15. Rotate clockwise to keep the insertion groove 6 open.

Next, as shown in FIG. 10, the fitting part 37a formed by bending at the side end of the uppermost steel sheet pile 5a stacked horizontally on the ground surface and the steel sheet pile 5b located below are fitted. The hook part 3 is inserted from the side into the gap 38 with the part 37b, and the fitting part 37a is inserted into the insertion groove 6 from the open part 11, and the fitting part 37a is inserted into the receiving part 4 as shown in FIG. bring it into contact. In this embodiment, the lower edges 1c and 1d of the side plates 1a and 1b of the substrate 1 are respectively formed to face the opening 11 and be inclined diagonally upward, so that the receiving part 3 can be easily inserted into the gap 38. has been done. And the eighth
As shown in the figure, when the cable 36 is lowered and the cam plate 27 is rotated counterclockwise against the tensile force of the spring 34, the axis of the spring 34 moves below the shaft 10, and the cam plate 27 The locking stepped portion 30b locks on the stop pin 29b, the rotary plate 26 rotates counterclockwise, the cam 9 fixed to the shaft 10 rotates counterclockwise in FIG. It protrudes into the groove 6 and grips the fitting part 37a of the steel sheet pile 5 with the tensile force of the spring 34. In addition, a window 40 is formed in the center of the receiving part 4,
It can be visually confirmed that the gripping portion 7 reliably grips the fitting portion 37a.

Then, as shown in FIG. 11, a fitting part 39a bent at the other side end of the steel sheet pile 5a is gripped by a gripper B, which is configured symmetrically to the gripper A. The pair of gripping tools A and B are, for example, the first
When suspending the steel sheet piles 5 horizontally stacked on the ground surface 41 to the vibrator 42 as shown in Figure 2,
That is, when hanging vertically, grips A and B are arranged in parallel in the direction perpendicular to the length direction of the steel sheet pile 5 as shown in Fig. 13, and when hanging horizontally, as shown in Fig. 14. Place them diagonally as shown.

Next, the ends of the cables 43 whose tips are bifurcated are wound around the pulleys 14 of the hanging members 15 of the respective grips A and B, and the cables 43 are wound around the winch, so that the grips A, The steel sheet pile 5 is lifted up via B. At this time, the lifting force applied to the hanging member 15 further applies a force in the closing direction to the cam 9, and the steel sheet pile 5
firmly grasp it and transfer it to the designated location. When the transfer is completed, pull the cable 36 and release the cam plate 2.
By rotating 7 against the tensile force of the spring 34, the gripping portion 7 is opened and the steel sheet pile 5 is released.

Further, a contact piece 44 is provided on the upper end 1a and front surface 1b of the base plate 1 to abut against the inclined side surface 43 of the steel sheet pile 5a.
and 45 are provided protrudingly, and a pair of gripping tools A,
When pulling B with the bifurcated cable 42, a force is applied in the direction in which they approach each other, so that the contact pieces 44, 45 come into pressure contact with the side surface 43, and the gripping tools A,
Since B is not rotated significantly, the lifting operation can be performed while maintaining a stable state.

In addition, although the above example shows the suspended state when the steel sheet piles 5 are stacked on the ground surface with the longitudinal grooves 46 facing downwards, they can also be stacked or placed on the ground surface with the grooves 46 facing upwards. As shown in FIG. 15, by fitting the fitting part 39a on the side edge into the receiving part 4 and grasping it in cooperation with the cam 9, it can be lifted and transferred in exactly the same way.

(Effects of the invention) As described above, the present invention is a gripping tool for handling steel sheet piles, which is formed of a plate material in which the part facing the cam of the insertion groove into which the side edge of the steel sheet pile is inserted is a hook portion with a V-shaped end surface. At the same time, since one surface in the axial direction of the cam and both ends perpendicular to this surface are open, the hook can be inserted from the side into the narrow vertical gap of the horizontally stacked steel sheet piles, and the hook can be inserted securely without requiring any effort. Moreover, the fitting part that connects the steel sheet piles to each other fits into the hook part, allowing for a stable grip and safe lifting and transport without fear of the steel sheet piles falling. In addition, when gripping both edges with a pair of gripping tools and lifting it with a single rope, the protrusions on the board touch the side surfaces of the steel sheet pile, preventing the gripping tools from rotating significantly in the direction of approaching each other. It can be transported in a stable state without any accidents such as parts shifting or cams coming off and falling.

Furthermore, according to the present invention, a cam plate that connects a spring that urges the cam in the engaging direction and a cable that moves the cam in the release direction is attached to a rotary plate that rotates together with the cam, so that the cable can be attached from a distance. It is convenient because it can be easily pulled and released so that it does not interfere with work such as driving into the ground.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a right side view, Figure 3 is a plan view, Figure 4 is a sectional view taken along the - line in Figure 1, Figure 5 is a sectional view taken along the - line in Figure 2, and Figure 6 shows the cam. A perspective view of the shaft to be fixed, FIG. 7 is a sectional view taken along the - line in FIG. 6, FIGS. 8 and 9 are sectional views taken along the - line in FIG. 2, FIGS. 10 and 11, Figures 12, 13, 14, and 15 are explanatory diagrams showing the state of use, Figures 16 and 17 are partially cut-away front views of the conventional example, and Figure 18 is the steel sheet pile. It is a perspective view showing a stacked state. 1... Board, 2... Board material, 3... Hook, 4...
Receiving part, 6... Insertion groove, 9... Cam, 10...
Shaft, 11, 12, 13... Opening part, 15... Hanging member, 17... Support shaft, 26... Rotating plate, 27...
Cam plate, 34... Spring, 36... Cable, 44...
Hit piece.

Claims (1)

[Claims for Utility Model Registration] An insertion groove 6 is formed between the receiving portion 4 and a cam 9 facing thereto, and the cam 9 rotates due to the lifting force applied to the hanging member 15, and In a gripping tool for lifting and transferring steel sheet piles that cooperates with part 4 to clamp the side edge of the steel sheet pile inserted into the insertion groove 6; The formed plate material 2 is fixed, and the insertion groove 6 is formed between the lower edge of the substrate 1 and the hook portion 3, and the upward surface of the hook portion 3 is connected to the receiving portion 4.
The cam 9 is arranged between the substrate 1 and the plate material 2 and is fixed to a shaft 10 rotatably supported by the substrate 1 and the plate material 2, and the hanging member 15 is connected to the cam. 9 by a support shaft 17; the insertion groove 6 is open at one axial surface of the cam 9 and both ends perpendicular thereto, and is connected to the substrate 1 on the axially open surface side. A contact piece 44 that comes into contact with the side surface of the steel sheet pile is protruded from the upper end; a rotary plate 26 is attached to the shaft 10 to which the cam 9 is fixed.
is fixed to the rotating plate 26, and the cam plate 27 is pivotally attached to the rotary plate 26 so as to be rotatable within a limited range, and a spring 34 and A cable 36 that moves in the direction of retraction from the insertion groove 6 is connected to the cam plate 27; a lifting and transferring grip.