JPS588968Y2 - Turnbuckle - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in turnbuckles.

Conventionally, a lock nut is used to prevent the turnbuckle from loosening after the length has been adjusted, but a tool such as a spanner is required to tighten the lock nut.

The present invention aims to improve the above-mentioned drawbacks of the conventional technology and provide a simple turnbuckle that can prevent screws from loosening without using tools, and whose locking member can also be used as the turnbuckle's rotating handle. Therefore, its characteristic feature is that the threaded rods are screwed into the turnbuckle body, which has opposite left or right screws on both ends, and the other end of each screw rod is connected to the link. In the case where the turnbuckle body is fixed, a handle receiver is provided on the turnbuckle main body, and both ends of the turnbuckle are attached to the handle so that the locking/rotating handle formed by bending an elastic wire rod springs toward the link side. While being eccentrically inserted into the receiver,
The present invention is characterized in that a hook portion is provided on the link, which can be freely engaged and detached in a pinch-like manner, and which engages with the link in a relatively unrotatable manner.

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

The illustrated example shows a turnbuckle when adopted in a tractor check chain. In FIG. 1, 1 is the tractor body, 2 is the rear wheel, 3 is a pair of left and right lower links,
This is done via the lift arm 4 and lift rod 5.
It is moved up and down around the pivot 6.

A working machine (not shown) is pivotally connected to the end 7 of the lower link 3 on the opposite side from the pivot 6.

A check chain 8 is stretched between a bracket 10 on the rear axle case 9 of the tractor body 1 and an intermediate portion of the lower link 3, and is intended to prevent the work machine from wobbling laterally.

This check chain 8 is constructed so that a turnbuckle 11 is attached to the middle part so that it can be pulled or loosened.

As shown in FIG. 2, the turnbuckle 11 includes a turnbuckle main body 12 made of a cylindrical body, and internal threads 13 and 14 provided in opposite directions on the left or right at both slightly narrowed ends of the main body 12. It consists of a pair of left and right screw rods 15 and 16 screwed together.

The end 18 of the left-hand threaded rod 15 opposite to the thread 17 forming portion and the end 20 of the right-hand threaded rod 16 opposite the thread 19 forming portion are integrally connected to the links 21 and 22 of the check chain 8 by welding or the like. combined.

The turnbuckle main body 12 is equipped with a mantle pipe 23 for protecting the screws 17 and 19 of the left and right threaded rods 15 and 16, which protrude from both ends of the main body 12, from rainwater, muddy water, etc., and for preventing rust.

The mantle tube 25 is made of a cylindrical body that is longer than the axial length of the turnbuckle body 12 and has an inner diameter that is approximately the same as the outer diameter of the turnbuckle body 12, and is fitted onto the turnbuckle body 12 and fixed integrally by welding or the like. has been done.

The length of the mantle tube 23 that protrudes from both ends of the turnbuckle body 12 is such that even when the left-hand threaded rod 15i and the right-hand threaded rod 18 are maximally extended from the turnbuckle body 12, the length of the mantle tube 23 that protrudes from both ends of the turnbuckle body 12 is such that even when the left-hand threaded rod 15i and the right-hand threaded rod 18 are maximally extended from the turnbuckle body 12, these screws 17 and 19 are extended. The length should be long enough to completely cover the area.

The gaps between the ends 24 and 25 of the mantle tube 23 and the shafts of the threaded rods 15 and 16 are closed with sealing materials 26 and 27 to prevent rainwater, muddy water, etc. from entering there. .

The sealing materials 26 and 27 are fixed to the mantle tube 23 and are slidable on the shafts of the threaded rods 15 and 16, respectively.

A grease nipple 28 is attached to a part of the circumference of the turnbuckle body 12 at the center in the axial direction, and fills the turnbuckle body 12 with grease.
This is to lubricate the screws 17 and 19.

Communication holes 29 and 30 are provided in the turnbuckle body 12 so that the grease filled in the turnbuckle body 12 also flows into the space formed between the mantle tube 23 and the threaded rods 15 and 16. The screws 17 and 19 are designed to allow lubrication not only within the turnbuckle body 12 but also within the mantle tube 23.

A portion of the mantle tube 23 surrounding the grease nipple 28 is opened, and the opening edge 31 is raised to open the nipple 28.
is protected from foreign objects.

At one end of the mantle tube 23 on the side of the chain link 21, a rotating handle 32 which also serves as a locking mechanism is attached.

The locking/rotating handle 32 is made by folding a piece of elastic wire, for example, a steel wire, in two in parallel, and bending it into a hook shape to attach the threaded rod 15 and the link 21 as shown in FIG. A so-called U-shaped hook portion 33 is formed which can be freely engaged with and detached from the hook portion, and which engages in a clamp-like manner in a manner that it cannot rotate relative to the hook portion.
It is rotatably fitted and supported in shaft holes 36, 36' that are opened eccentrically on both sides of the nozzle receiver 35 fixed on the mantle tube 23, and the eccentricity of the separated ends 34, 34' is supported. The hook portion 33 is configured to be resiliently pushed toward the link 21 by the spring force generated by the single-fiber attachment.

When the locking/rotating handle 32 is constructed or installed in this manner, the hook portion 33 is removed from the threaded rod 15 and the link 21, and the hook portion 33 is removed from the threaded rod 15 and the link 21, and the hook portion 33 is moved around the detached end portion 34° 34′ as shown in FIG. By rotating the mantle tube 23 in the direction shown in FIG. By moving the check chain 8, the axial length of the turnbuckle 11 can be changed.
can be pulled or loosened.

After adjusting the length, tilt the handle 32 in the direction B in the figure and attach the hook part 33 to the screw rod 15 and the link 21.
By engaging the turnbuckle body 12 in a pinched manner, rotation of the turnbuckle body 12 can be prevented and the screws can be prevented from loosening.

Furthermore, according to this handle 32, the state of engagement of the hook portion 33 with the threaded rod 15 and the link 21 is reliably maintained by the spring force generated by the eccentric mounting structure of the separated ends 34, 34'. There is no possibility of the threaded rod 15 and the link 21 being accidentally separated from each other due to vibration or the like.

Depending on the rotation adjustment angle of the housing, the handle 32 may be engaged with the screw rod 15 from the lower side of the rod 15, contrary to the illustrated example, but even in this case, it will be released due to the spring force. There is no such thing, and it is possible to ensure a state of preventing loosening.

Although the above-mentioned loosening handle 32 is attached to the turnbuckle main body 12 via the outer tube 23, the outer tube 23 may be removed and the handle 32 can be directly attached to the turnbuckle main body 12.

In the present invention, the turnbuckle main body is provided with a turnbuckle receiver, which is made by bending an elastic wire rod and serves as a lock and rotate.In order for the turnbuckle to spring back toward the link, both ends of the turnbuckle are connected to the・The handle is eccentrically inserted and supported in the turnbuckle receiver, and is provided with a hook portion that can be freely engaged with and detached from the link in a clamp-like manner and that engages with the turnbuckle in a relatively immovable manner, and the handle is attached to the turnbuckle along the length of the turnbuckle. An operating handle function for adjusting the height, a locking function that engages with the link to prevent relative rotation, and a locking function that maintains the engaged state with the link by the spring force generated by the eccentric mounting structure. It has multiple functions and is highly economical due to the dual use of parts.

In addition, the length of the turnbuckle can be adjusted and prevented from loosening easily by engaging/disengaging and rotating the handle link without using any tools.Furthermore, the wire rod is bent and formed to make the turnbuckle eccentric. It has a simple structure that can be inserted and supported in a shape, and has the advantage that it can be provided at low cost.

[Brief explanation of drawings]

Fig. 1 is a side view of the rear part of a tractor equipped with a turnbuckle according to the present invention, Fig. 2 is a cross-sectional view of the turnbuckle, Fig. 3 is a cross-sectional view taken along the line -■ in Fig. 2, and Fig. 4 is a cross-sectional view of the turnbuckle. The TV-TV line sectional view in the same figure, Figure 5 is the ■-
It is a sectional view taken along the V line. 15.16...Screw rod, 12...Turnbuckle body, 32...Rotating handle that also serves as a locking mechanism.

Claims (1)

[Scope of utility model registration request] Threaded rods 15 and 16 are screwed into the turnbuckle body 12, which has opposite left and right screws 13 and 14 at both ends, and the other ends 18 and 20 of each screw rod 15 and 16 are connected to links 21, respectively. .22, a handle receiver 35 is provided on the turnbuckle main body 12, and a locking/rotating handle 32 made of bent elastic wire is attached to the link 21 side. A hook portion whose both ends 34 and 34' are eccentrically inserted and supported in the handle receiver 35 in a resilient manner, and which can be freely engaged with and detached from the link 21 in a clamp-like manner and engaged with the link 21 in a relatively immovable manner. A turnbuckle characterized by being provided with 33.