JPS5847587B2 - Ichihou Kouchiyatsuku - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ball chuck that is attached to a wire and used when applying tension to the wire.

Conventionally, when suspending a wire, tension is applied to the wire while pulling it to fix the end.
The wire was pulled by attaching a ball chuck to the wire and making a relative reciprocating motion, but since it is impossible to remove the wire after it has been suspended and fixed at both ends, It is necessary to support the tension of the wire with a tension mechanism, and to perform the fixing work after pulling out the ball chuck, which has drawbacks such as complicated work setup and the need for many tools.

Also, when installing it, it cannot be passed through if both ends are already fixed, so it must be passed through before being fixed, and if it is applied to an existing wire, the fixed ends must be removed or cut before passing through. This was extremely time-consuming and inconvenient.

In addition, in conventional ball chucks, relative movement between the wire and the ball chuck is only possible in one direction, so it is not possible to move the attached ball chuck to an arbitrary position and reinstall it depending on the direction of movement. , which was extremely inconvenient for work.

The present invention eliminates the above-mentioned drawbacks of the conventional chuck by providing a groove that communicates the wire gripping space of the one-way chuck with the dissection, and allows the wire to be fixed at both ends at any position. The object of the present invention is to provide a one-way chuck that can be installed from the side and can be removed from the side on the spot even after fixing work.

Another object of the present invention is to provide the one-way chuck with a release device for releasing the grip on the wire, so that the one-way chuck can be removed laterally from the wire on the spot by releasing the restraint by the release device as necessary. The purpose of the present invention is to make it possible to easily do this, and also to make it possible to slide the one-way chuck in any direction on the wire and attach it again at any other position.

The present invention relates to a one-way chuck characterized by having a groove along the entire length that communicates a wire gripping space with the outside, and a one-way chuck characterized by having a release mechanism for roughly releasing the grip. be.

To explain the present invention with reference to the drawings, a ball chuck having a combination of a ball and a tapered surface to provide unidirectionality is shown, which has a casing 1 on the outside.

The casing 1 has a substantially cylindrical shape, has a conical inner surface 10 whose inner diameter at one end becomes narrower as it approaches the end, has an opening 11 at one end, and has an opening 12 at the other end through which the wire 9 passes. The space between the openings 11 and 12 is a space for grasping the wire.

Further, a groove 8 is provided in the wall of the casing 1 in the axial direction, so that the outside and the wire gripping space communicate over the entire length.

There are multiple pieces inside the casing 1 (three pieces in this example).
A spindle 2 having a built-in ball 3 is movably provided.

The outer periphery of the spindle 2 is a conical outer surface 13 having a taper that matches the conical inner surface 10, and has a wire gripping space inside.

Three balls 3 are arranged at intervals of approximately 120°, and are housed in guide holes 14 so as to be movable in the radial direction, and have a conical outer surface 13 on the outside and a space for gripping the wire rod on the inside.

Furthermore, a split groove 15 is provided in the spindle 2 over the entire length of the spindle 2, avoiding the ball 3 in the axial direction, so that the outside communicates with the wire gripping space.

A guide pin 5 is attached to the larger diameter end of the spindle 2.
The guide pin 5 slidably passes through one end of the casing 1, and the fixing plate 6 is fixed by the stopper 1.

A spring 4 is installed around the guide pin 5 inside the casing 1.
is provided, and the spindle 2 is always given a force to be pressed against the conical inner surface 10.

The guide pin 5 and the fixing plate 6 constitute a release mechanism for releasing the grip on the wire rod.

That is, when the fixing plate 6 is pulled away from the casing 1, the spindle 2 is pulled against the spring 4 through the guide pin 5, and the ball 3 becomes free and the grip on the wire rod 9 is released.

When the one-way chuck constructed in this manner does not grip a wire inside, the spindle 2 is pressed against the conical inner surface 10 by the force of the spring 4, as shown in FIG. 1, and the balls 3 are held inside. They are pushed in and almost touching each other.

Next, to hold the wire inside, pull the fixing plate to separate the spindle 2 from the conical inner surface 10, allowing the ball 3 to move freely, and pass the wire 9 through the grooves 8, 15 in a direction perpendicular to the axis. If the wire rod 9 is taken into the wire gripping space, or conversely, the chuck itself is placed over the wire rod 9, and the fixing plate 6 is stopped being pulled, the spindle 2 is pushed again by the force of the spring 4.

However, since the wire 9 is squeezed between the balls 3, the balls are closed. 3 cannot sink below the conical outer surface 13 and hits a point midway on the conical inner surface 10, maintaining equilibrium in the state shown in FIG.

In this state, even if a force is applied to the wire 9 in the direction A (or even if the chuck is pulled in the direction B), the wire 9 is gripped and held more firmly by the wedge action of the taper and will not come off.

Conversely, when a force is applied to the wire 9 in the B direction (or when the chuck is pulled in the A direction), the wedge comes off and the wire 9 can move freely, thus demonstrating the function of a one-way chuck. It is something.

Further, when the one-way chuck is pulled in the B direction, if the wire rod 9 can move, the wire rod 9 can be pulled in the B direction as a unit.

If the wire 9 is fixed, pulling the one-way chuck in the direction A will remove the wedge, and the ball 3 will roll while remaining in contact with the wire 9, allowing the one-way chuck to move freely on the wire 9. When pulled in direction B, it cannot be moved due to wedge action.

However, by operating the pulling release device in a direction to separate the fixing plate 6 from the casing 1, the restraint due to the wedge action is released and the one-way chuck can be freely moved in the direction of falling.

Due to the above-mentioned functions, the ball chuck of this embodiment can be used as a wire rod fixing device as well as a wire rod conveying device.

To remove it, in addition to slightly moving the one-way chuck in direction A, pull out the fixing plate 6 sufficiently to release the ball 3 and release the grip, and either move the wire 9 in a direction perpendicular to the axis or lift the chuck itself. It can be removed very easily on the spot.

In other words, there is no need to move the wire in the axial direction to insert or remove it, so even if both ends of the wire are fastened, or if the chuck cannot be moved in the axial direction, it can be easily attached and removed. .

Guide pin 5 so that grooves 8 and 15 always match
also functions to prevent the casing 1 and spindle 2 from rotating.

It is more stable if there are two or more guide pins 5.

A similar effect can be obtained by using a mechanism that pushes the thinner end of the spindle 2 as the grip release mechanism.

For these operations, link. It can be operated from a distance using levers, wires, etc.

In addition to the above-mentioned ball, the one-way mechanism includes a wedge mechanism,
A clamp mechanism, an eccentric cam mechanism, etc. can also be used.

The present invention has a groove that communicates the wire gripping space with the outside over the entire length, so that the one-way chuck can be easily attached from the side at any position even on a wire whose both ends are fixed. In addition, even after fixing work, it can be removed from the side while remaining in the same position, and by providing a grip release mechanism, it is easier to remove the one-way chuck from the wire, and it is also possible to remove the one-way chuck from the wire in the direction in which it falls. The one-way chuck can be moved freely and reattached to any position, and it can be attached and detached without damaging the wire, increasing safety, and the spring support ensures secure fixation and is sufficient to withstand shocks. It is possible to provide a one-way chuck that can be attached elastically with absorption, which makes work reliable and easy, and which can be applied to various uses, and has an extremely effective practical effect.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, with FIG. 1 being a longitudinal sectional view and FIG.
The figure is a sectional view taken along line 1-1 in FIG. 3, and FIG. 3 is a sectional view taken along line T' in FIG. 2. 1...Casing, 2...Spindle, 3...Ball, 5...Guide pin,
6... Fixed plate, 8, 15... Division groove,
9...Wire rod.

Claims (1)

[Claims] 1. Openings 11 and 12 through which the wire 9 can be inserted into the casing 1
It has a split groove 8 over its entire length that communicates a certain wire rod gripping space with the outside of the casing, and has a tapered outer surface 13 and a split groove 15 in the wire rod gripping space, and a plurality of balls 3, 3.
A spindle 2 built in through a guide hole 14 so as to be able to move in the radial direction is slidably provided in alignment with the tapered inner surface 10 formed in the casing 1, and a spindle 2 is provided in the casing 2 to engage with the spindle. A one-way chuck characterized in that a supported spring 4 is installed inside and the ball 3 is pressed against a tapered inner surface 10. 2 Openings 11 and 12 through which the wire rod 9 can be inserted into the casing 1
It has a split groove 8 over its entire length that communicates a wire rod gripping space with the outside of the casing, and has a tapered outer cylinder 13 and a split groove 15 in the wire rod gripping space, and has a plurality of balls 3, 3.
A spindle 2 built in through a guide hole 14 so as to be able to move in the radial direction is slidably provided so as to be pressed against the inner surface of the casing 1 by a spring 4, and a guide pin 5 is attached to the spindle 2. A mechanism is provided as a release mechanism for releasing the grip of the wire by the ball 3, in which a fixing plate 6 is provided by protruding the guide pin 5 outside the casing 1. direction chuck.