JPS6134014B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a turnbuckle used for tensioning ropes, wires, chains, etc. for securing loads.

A normal turnbuckle has reverse threaded holes formed at both ends of a long and slender frame body, and a pair of threaded rods are screwed into each of the threaded holes.The pair of threaded rods are moved in opposite directions by rotating the frame body. Since the wire connected to the end of the threaded rod is then tensioned, there is a drawback that it takes a lot of effort to tension and release the tension of the wire.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a turnbuckle that allows tensioning and tension release of wires and the like to be carried out in a short period of time.

The structure of the present invention is such that the block body at the end of the elongated frame body is provided with a threaded rod insertion hole extending in the length direction of the frame body and a nut fitting hole that intersects with the threaded rod insertion hole, The cross-sectional shape of the thread of the slideable threaded rod inserted into the rod insertion hole is triangular with one side being a vertical plane, and a half nut body that can be engaged with this threaded rod is inserted into the nut fitting hole. A spring is provided that is slidably fitted and presses the nut body toward the threaded rod, and an operating lever for engaging and disengaging the nut body is swingably attached to the block body, and the operating lever is formed with a cam piece that engages with the outer periphery of the nut body to hold the nut body in an engaged state, and engages with the cam piece when the operating lever is swung to separate the cam piece from the nut body. The present invention is characterized in that a protrusion is provided on the nut, and a temporary fixing mechanism is provided for stopping the operating lever when the cam piece is in contact with the nut body.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 6, the elongated frame main body 1 includes opposing side plates 2, 2.
An end plate 3 is provided between one end of the side plate 2, and a block body 4 is provided between the other end of the side plate 2.

A threaded rod insertion hole 5 is formed in the block body 4 passing from the front end surface to the rear end surface, and a nut fitting hole 6 communicating with the threaded rod insertion hole 5 is provided on the upper surface. A threaded rod 7 is slidably inserted into the threaded rod insertion hole 5, and a connector 8 is attached to the end of the threaded rod 7 projecting outward from the frame body 1 and the end plate 3 of the frame body 1. .

Note that as the connector 8, a stopper or the like that can be engaged with a hook, a lashing pot, or the like can be adopted.

A gear 9 rotatably supported by the block body 4 is engaged with the threaded rod 7, and this gear 9 is connected to the gear shaft 1.
When the handle engaged with the end of the threaded rod 7 is rotated by a rotational operation, the threaded rod 7 moves in the axial direction.

The cross-sectional shape of the thread 11 of the threaded rod 7 is triangular (see FIG. 3), and one surface of the thread 11 is a vertical surface perpendicular to the axis of the threaded rod 7. A half nut body 12 which can be engaged with the threaded rod 7 is slidably inserted into the nut fitting hole 6 of the block body 4.

A pair of support pieces 13, 13 are provided on the upper surface of the block body 4 at positions on both sides sandwiching the nut fitting hole 6.
The nut body 1 is tightened by the pin 14 passed between the support pieces 13.
An operating lever 15 for engagement and disengagement of 2 is swingably supported, and when the operating lever 15 is swung to be parallel to the threaded rod 7, the operating lever 15
The tips of a pair of cam pieces 16 provided at the ends of the nut body 12 are brought into contact with the upper surface of the nut body 12 so that the nut body 12 is secured to the threaded rod 7.
It is designed to be held in a state where it is engaged with.

A receiving portion 17 is formed on one side of the cam piece 16, and this receiving portion 17 is connected to protrusions 19 provided on both upper sides of an engagement plate 18 that stands up from the rear of the upper surface of the nut body 12.
When the operating lever 15 is swung to separate the tip of the cam piece 16 from the nut body 12, the receiving portion 17 engages with the protrusion 19, and in the engaged state, When the operating lever 15 is further swung in the same direction, the nut body 12 is pulled up.

One end of a leaf spring 20 is fixed to the front upper surface of the nut body 12, and a bent portion 21 formed at the other end of the leaf spring 20 is in pressure contact with the outer periphery of the tip of the operating lever 15. On the other hand, a first engaging part 22 , a second engaging part 23 , and a third engaging part 24 are arranged in a circular direction on the outer periphery of the tip of the operating lever 15 . When the nut body 12 comes into contact with the upper surface of the nut body 12, the first engaging part 22 engages with the bent part 21, and the receiving part 17 of the cam piece 16 is brought into contact with the protruding part 19.
, the second engaging portion 22 engages with the bent portion 21. Further, when the receiving part 17 and the protruding part 19 of the cam piece 16 are engaged and the nut body 12 is pulled up to the disengaged position with respect to the threaded rod 7, the third engaging part 24 engages with the bent part 21, The operation lever 15 is temporarily fixed at the swinging position by the engagement between each engaging portion and the bent portion 21.

The turnbuckle shown in the embodiment has the above-mentioned structure, and this turnbuckle engages, for example, a latching pot or the like in which the connector 8 of the frame body 1 is fixed to the deck of the ship's hull, while the connector 8 at the end of the threaded rod 7 engages with the latching pot. Connect the ends of the tie wire to tension the wire.

Now, when the operating lever 15 is swung in a direction so as to stand up on the top surface of the block body 4, the tips of the pair of cam pieces 16 are separated from the top surface of the nut body 12, and during the swiveling, they touch the receiving part 17 of the cam piece 16. nut body 1
The second protrusion 19 engages (see FIG. 7). Then, when the operating lever 15 is further swung in the same direction, the nut body 12 is pulled up due to the engagement between the receiving part 17 and the protrusion 19, and the engagement between the nut body 12 and the threaded rod 7 is released. (See Figure 8). In this state, when the threaded rod 7 is pushed inward into the frame body 1, the wire connected to the connector 8 at the end of the threaded rod 7 is pulled, making it possible to straighten the wire.

After making the wire into a straight line, the operating lever 15 is pushed down and the second engaging portion 23 is connected to the plate spring 20.
When the nut body 12 is engaged with the bent portion 21 of the nut body 12, the elasticity of the leaf spring 20 holds the nut body 12 in a state of engagement with the threaded rod 7 (see FIG. 7).

By the way, one surface of the thread 11 of the threaded rod 7 is a vertical surface, and the nut body 12 that engages with the threaded rod 7 is held in the engaged state by the elasticity of the leaf spring 20. When trying to move the threaded rod 7 to the outside of the frame body 1 in the state shown in Fig. 7, the thread 11
The vertical surfaces of the frame body 1 are engaged, and the threaded rod 7 cannot be moved to the outside of the frame body 1. Further, when the threaded rod 7 is pushed in the axial direction toward the inside of the frame body 1, slipping occurs between the inclined surfaces of the threads 11, so that the threaded rod 7 can freely move into the frame body 1.

Therefore, when a handle is attached to the gear shaft 10 and the gear 9 is rotated in a rotatable direction in the state shown in FIG. 7, the threaded rod 7 moves toward the inside of the frame body 1.
The wire can be taut.

After the wire is tensioned by the above operation, the lever 15 is pushed down and the bent part 21 of the leaf spring 20 is attached to the first engaging part 22.
When engaged, the tip of the cam piece 16 touches the nut body 12.
The nut body 12 is held in a state of engagement with the threaded rod 7 by contacting the upper surface (see FIG. 3), and by rotating the frame body 1, the engagement between the nut body 12 and the threaded rod 7 is increased. If necessary, the threaded rod 7 can be moved axially to further tension the wire.

Note that by swinging the operating lever 15 in the upright direction to separate the nut body 12 from the threaded rod 7, the tension in the wire can be instantly released.

FIG. 9 shows another embodiment of the turnbuckle according to the invention.

Pin 14 passed between support pieces 13 of block body 4
A tight spring 25 is fitted to the coil portion 26 of the tight spring 25, and a protrusion 27 formed on the coil portion 26 of the tight spring 25 is inserted into a hole (not shown) formed on the support piece 13 and is prevented from rotating. is brought into contact with the upper surface of the nut body 12 to press the nut body 12 toward the threaded rod 7. Also, tight spring 2
The other end of 5 engages with the operating lever 15 to deflect the operating lever 15 in the upright direction, and holds the operating lever 15 in a state where the cam piece 16 separates from the nut body 12.

Further, an engagement spring 28 is attached to the operation lever 15, and when the operation lever 15 is swung and the cam piece 16 presses the nut body 12, the engagement spring 28 is attached to the operation lever 15.
The bent portion 29 engages with the protrusion 19 of the engagement plate 18 to hold the operating lever 15 in the swung position.

In the above embodiment, the operating lever 1 is positioned at the position where the cam piece 16 presses the nut body 12 and at the position where the cam piece 16 separates from the nut body 12.
5 can be stopped and held, and in a state where the cam piece 16 is separated from the nut body 12, the threaded rod 7 can be moved in the load tightening direction in a state where the nut body 12 is engaged.

As described above, in the present invention, when the operating lever is rocked, the nut body engages or disengages from the threaded rod, and in the disengaged state, the threaded rod can be moved in the axial direction. The lashing wire, rope, chain, etc. connected to the end of the threaded rod can be quickly tensioned and tensioned, and the lashing work can be carried out efficiently. In addition, by separating the cam piece of the operating lever from the nut body and stopping the operating lever at a position where the cam piece corresponds to the protrusion of the nut body, the threaded rod can be moved inward of the frame body. Therefore, it is possible to tension the load tightening wire, rope, chain, etc. to a certain extent, and as a result, the load tightening wire, rope, chain, etc. can be strongly tightened by a slight rotation of the frame body.

[Brief explanation of the drawing]

Fig. 1 is a front view of the turnbuckle according to the present invention, Fig. 2 is a plan view of the same as above, Fig. 3 is a longitudinal sectional front view showing the main parts of the above, Fig. 4 is a longitudinal sectional side view of Fig. 3; The figure is a perspective view showing the operating lever same as above, FIG. 6 is an exploded perspective view showing a part of the operating lever same as above, the nut body, the block body and the threaded rod, and FIGS. 7 and 8 are the operations shown in FIG. 3. FIG. 9 is a longitudinal sectional front view showing another embodiment of the same as the above. 1...Frame body, 4...Block, 5...Threaded rod insertion hole, 6...Nut fitting hole, 7...Threaded rod, 8
... Connector, 11 ... Screw thread, 12 ... Nut body, 15 ... Operation lever, 16 ... Cam piece, 17
...Receiving part, 18... Protrusion, 20... Leaf spring.

Claims (1)

[Claims] 1 A threaded rod insertion hole is formed in the block body at the end of the elongated frame body, and a nut fitting hole is provided on the outer periphery of the block body to communicate with the threaded rod insertion hole, and a nut fitting hole is provided in the outer periphery of the block body, and The cross-sectional shape of the screw thread of the inserted slidable threaded rod is triangular with one side being a vertical plane, and a half-split nut body that can be engaged with this threaded rod is slidably fitted into the nut fitting hole. The block body is provided with a spring that presses the nut body toward the threaded rod, and an operation lever for engaging and disengaging the nut body is swingably attached to the operation lever. A cam piece is provided to hold the cam piece in engagement with the threaded rod, while a protrusion is provided on the nut body to engage the cam piece when the cam piece is separated from the nut body by swinging the operating lever, A turnbuckle provided with a temporary fixing mechanism that stops and holds the operating lever at a position where the cam piece of the operating lever presses the nut body.