JPH036095Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is suitable for live line work such as high-voltage distribution lines.
This relates to a grip stake in which a worker holds one end of the stake and hooks the hook provided at the tip of the stake to the eye ring of equipment or tools installed at a high place to operate the stake.

(Prior art) The conventional grip stake used for the above-mentioned live wire work has a structure in which a handle provided in the middle of the stake is slid and then another lever is operated to grip an object with a hook at the tip. It is.

(Problems to be solved by the invention) However, with this conventional method, the lower part of the stake must be held in hand, the tip of which must be latched to equipment installed at a high place, and the above-mentioned operation must be performed. Therefore, it is complicated to operate, difficult to handle, and has poor workability.

(Means for solving the problem) Therefore, this invention allows you to completely grasp an object such as the eye ring with the hook at the upper end by grasping the operating handle provided at the bottom of the stay, and by pressing the release lever, the internal spring can be released. This allows the hook to return and release the grip on the object, allowing for simple handling of the stake and improved work efficiency.

The structure of this invention is that a central shaft is provided in a long external cylinder so as to be slidable in the longitudinal direction of the external cylinder, and a base is pivotably supported at the upper end of this central shaft so that it can be tilted freely with respect to the axial direction of the central shaft. A spring is provided on the outer periphery of the center shaft to bias the hook so that it always protrudes from the upper end of the outer cylinder, and ratchet teeth are provided on one side of the outer periphery of the center shaft in the lower part of the outer cylinder. A ratchet lever is rotatably provided on the handle, one end of which is pivotally supported on the bearing body, and the pawl of the ratchet lever can be freely engaged with the ratchet teeth through a long hole drilled in the longitudinal direction of the outer cylinder, and the lock can be released in the opposite direction to the ratchet lever. A lever for use is rotatably supported on the bearing body, and a pawl is provided at one end of the lever that is constantly pressed and engaged with the ratchet teeth through a hole in the outer cylinder.

(Function) To use this grip to pull, tighten, or loosen objects such as equipment at high places or eye rings of tools, the operator must manually touch the lower part of this grip stay. Hold the handle, hook the hook protruding from the upper end of the grip stick onto the object, and grasp the handle. As a result, the pawl of the ratchet lever moves downward in the longitudinal direction of the outer cylinder while meshing with the ratchet teeth of the center shaft. At this time, the claw of the lock release lever moves the ratchet tooth downward, but it engages with the ratchet tooth which stops the ratchet tooth from moving.
Prevents upward movement of the ratchet teeth and center shaft. When the handle is gripped in this manner, the center shaft moves downward within the outer cylinder, and by repeating this several times, the lower part of the hook at the upper end enters inside the upper end of the outer cylinder, and the opening of the hook is hidden inside the outer cylinder. The object is thus completely gripped by the hook. In this state, the eye ring is rotated by pulling the grip stick to manipulate the object, or by turning the entire grip stick by hand, thereby tightening or loosening it.

(Example) An example of this invention will be described below with reference to the drawings.

Reference numeral 1 denotes a long outer cylinder, and 2 a cylindrical head portion provided at the upper end of the outer cylinder 1. Inside the head portion 2, a groove 3 having a substantially cross-shaped cross section is formed in the axial direction. 4, the outer cylinder 1 and the head part 2 are placed inside the outer cylinder 1 and the head part 2.
The center shaft 5, which is slidably provided in the longitudinal direction, is a hook base provided at the upper end (on the left side in FIG. 1) of the center shaft 4. This hook base 5 is approximately cross-shaped, and the above-mentioned head It is slidable within the groove 3 of the portion 2. 6 is a hook-shaped hook whose base is pivotally supported in a hole 7 bored at one end of the hook base 5;
is always kept in the state shown in FIG. 1 by a spring (not shown), that is, tilted with respect to the center shaft 4, with an opening at one end thereof. Reference numeral 8 denotes an auxiliary rod protruding from the upper surface of the hook base 5 at the end opposite to the rotary support portion of the hook 6, 9 an annular spacer provided on the inner periphery of the upper part of the outer cylinder 1, and 10 the annular spacer 9. A force storage spring is wound around the outer periphery of the center shaft 4 between the upper end and the lower end of the hook base 5, and the force of this spring 10 urges the hook base 5 to be located at the upper end of the head portion 2. Reference numeral 11 denotes a shaft whose one end is fixed to the lower end inside the outer cylinder 1 of the center shaft 4 and projects on an extension line of the center shaft 2. Reference numeral 12 designates a middle cylinder for supporting a ratchet, which is slidably mounted on the outer periphery of the shaft 11. , 13 are straight ratchet teeth provided on one side of the middle cylinder 12, 14 and 15 are washers and fixing nuts provided at the lower end of the shaft 11, and 16 are linear ratchet teeth provided on one side of the middle cylinder 12.
A spring is wound around the outer periphery of the shaft 11 between the lower end of 3 and the washer 15; 17 is a handle provided at the lower end of the outer cylinder 1 (on the right side in FIG. 1); A long hole is bored in the outer periphery of the cylinder 1 in the longitudinal direction of the outer cylinder 1, 19 is a bearing body that is fixed to the outer periphery of the outer cylinder 1 on both sides of the long hole 18 and protrudes outward from the outer periphery of the outer cylinder 1, and 20 is the long hole mentioned above. Attach one end to the pin 20a at 19 locations on the bearing body protruding on the opposite side from 18.
a handle bent at an obtuse angle, pivoted by
1 is a ratchet lever with one end pivoted on one side of this handle 20, and 22 is this ratchet lever 2.
This pawl 22 protrudes from the free end of the tooth 1, and can pass through the elongated hole 18 and engage with the ratchet tooth 13. 23 is a spring for feeding the pawl 22 provided between the handle 20 and the ratchet lever 21;
The spring 23 raises the ratchet lever 21 against the handle 20, and the pawl 22 engages the ratchet teeth 1.
3 so that they are pressed into engagement with each other. Reference numeral 24 denotes a spring for returning the handle 20, which has one end fixed to one side of the bearing body 19 and the other end fixed to the handle 20. This spring 24 causes the free end of the ratchet lever 21 and the free end of the handle 20 to be moved outward. The tube 1 is biased to be pulled upward. Reference numeral 25 denotes a protrusion rod that is passed between the bearing bodies 19 on both sides of the elongated hole 18.
2 is caught, separating the pawl 22 from the ratchet teeth 13. Reference numeral 26 denotes a lock release lever supported between bearing bodies 19 on both sides above the handle 20, and one end of the lock release lever 26 is connected to the ratchet tooth 13 through a hole 27 bored in the outer circumference of the outer cylinder 1. It has a claw 26a that can be freely engaged with. Reference numeral 28 denotes a biasing spring that presses and engages the pawl 26a of the lock release lever 26 with the ratchet teeth 13 at all times. 29 is a hook fixed to the upper outer periphery of the outer cylinder 1 with a band 30 for hanging onto other objects, and 31 is an umbrella provided in the middle of the outer cylinder 1 as an insulating boundary mark.

In the case of this embodiment, hold the handle part 17 and the lower part of the outer cylinder 1 with your hands, hook the hook 6 to the eye ring (not shown) of equipment installed at a high place, grasp the handle 20, and push it. . As a result, the handle 20 rotates clockwise around the pin 20a in FIG. (moved to the right in the figure), claw 22
is separated from the protruding rod 25 and engages with the ratchet tooth 13 by the force of the spring 23, pulling down the ratchet tooth 13 and the middle cylinder 12 as shown in FIG.

At this time, the pawl 26a of the lock release lever 26 comes into contact with the gentle slope of each tooth of the ratchet teeth 13, so that it can pass through each tooth, and the force storage spring 10 is compressed. and handle 20
When the pressure is released, the force of the spring 24 causes the ratchet lever 21 and handle 20 to return to the state shown in FIG. 1, and the claw 22 of the ratchet lever 21 separates from the ratchet teeth 13. At this point, the force of the force storage spring 10 acts to pull the center shaft 4 back upwards, but the pawl 26a of the lock release lever 26 engages with the ratchet teeth 13, preventing the ratchet teeth 13 from moving upward. . When the handle 20 is pressed several times in this manner, the center shaft 4 gradually descends inside the outer cylinder 1 against the force of the force storage spring 10. As the center shaft 4 slides downward, the hook 6 comes into contact with the edge of the groove 3 at the upper end of the head section 2, and rotates against the force of the spring as shown in Fig. 4. Enter as shown. At this time, hook 6
The free end of is close to the tip of the auxiliary rod 8 and closes the opening. Therefore, the eye bolt, etc. hooked onto this hook 15 is grasped.

Here, the ratchet tooth 13 and the lock release lever 2
6 are engaged with each other, and the center shaft 4 etc. are fixed in this state. However, normally the ratchet teeth 13 and the claw 26a of the lock release lever are not tightly engaged with each other, and the gap between the teeth and the claw is There is some play, and the tip hook 6 also becomes loose.
In this embodiment, a spring 16 is interposed between the lower end of the middle cylinder 12 that is slidably mounted on the shaft 11 and the lower end of the shaft 11 to pull the shaft 11 downward and the middle cylinder 12 upward. Therefore, the ratchet teeth 13 and the pawl 26a are completely fitted, and the hook 6 does not play as described above.

Therefore, the eye ring etc. are completely gripped by the hook 6 and will not come off unnecessarily. Therefore, you can operate the eye ring etc. by pulling this stick downward. It is also possible to rotate the eye ring etc. by turning the entire stay by hand.

After completing these operations, to remove the eye ring from the hook 6, push the lock release lever 26, the pawl 26a will disengage from the ratchet teeth 13, and the force of the storage spring 10 will cause the center shaft 4 to move inside the outer cylinder 1. By sliding upward, the hook 6 projects to the upper end of the head portion 2, and is rotated obliquely by the force of the spring to open the opening. Therefore, the eye ring etc. can be easily removed from the hook 6 at the upper end of the stake.

Further, as described above, the hook 6 can be inserted into the head section 2 by pressing the handle 20 several times, but the degree of insertion of the hook 6 into the head section 2 can be adjusted by adjusting the number of times the handle 20 is pressed or the width of rotation due to the pressing. can be adjusted arbitrarily.

(Effect of the invention) As described above, in this invention, when the handle is grasped, the ratchet pawl pulls the ratchet teeth provided on the center shaft downward, which causes the center shaft with the hook at the tip to move downward and lock at that point. Since the claw of the release lever engages with the ratchet teeth, the center shaft is prevented from moving up and down. Therefore, by squeezing the handle, the hook closes its opening, and an object can be grasped with this hook. Therefore, even if the lower part of the stake which grips the object with the hook at the upper end is operated by hand, the hook will not be unnecessarily removed from the object. Furthermore, simply by pressing the lock release lever, the hook rises and the opening extends outside the outer cylinder, making it extremely easy to remove the hook from the object.

Therefore, operations such as bringing the hook at the end of the grip stick close to an object installed at a high place, such as the eye ring of a tool, and gripping it or removing it can be easily and reliably performed, and the operation can be performed easily and reliably. Line work can be done quickly and work efficiency can be improved.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view of this device, Figure 2
The figure is an enlarged left side view of the same device, Figure 3 is a partial sectional view showing the hook of this invention inserted into the head part, and Figure 4 is a partial sectional view of the handle part of this invention when the handle is turned. It is a diagram. In the figure, 1 is the outer cylinder, 2 is the head part, 4 is the center shaft, 5 is the hook base, 6 is the hook, 10 is the force storage spring, 11 is the shaft, 12 is the middle cylinder, 13 is the ratchet tooth, and 18 is the Long hole, 19 is bearing body, 20
2 is a handle, 21 is a ratchet lever, 22 is a pawl, 23 is a spring, 24 is a spring, 25 is a protruding rod, 26 is a lock release lever, and 27 is a hole.

Claims (1)

[Scope of utility model registration request] A central shaft that is slidable in the longitudinal direction of the external cylinder is provided inside the long external cylinder, and a hook is provided at the upper end of this central shaft, the base of which is pivoted so as to be tiltable with respect to the axial direction of the central shaft. A spring is provided on the outer periphery of the center shaft, which biases the hook so that it always protrudes from the upper end of the outer cylinder.
Ratchet teeth are provided on one side of the outer periphery of the center shaft in the lower part of the outer cylinder, and a rotatable ratchet lever is provided on the handle, one end of which is pivotally supported on a bearing body provided on the outer periphery of the outer cylinder. A lock release lever which can freely mesh with the ratchet teeth through a drilled elongated hole and which is opposite to the ratchet lever is pivotally supported on the bearing body, and one end of this lever is constantly pressed against the ratchet teeth through a hole in the outer cylinder. It is characterized by having interlocking claws,
Handle type grip stick.