JPH02282193A - Cable winding device - Google Patents

Abstract

PURPOSE:To firmly hold a cable so as to prevent it from slipping even if it is subjected sudden tensile force by providing a groove, in which the cable is placed, in the peripheral canter of both combined gears, and setting the depth of the groove smaller than the height of a tooth of the gears. CONSTITUTION:Two meshing major and minor gears 10, 12 are rotatably supported to a base member 14, and at both the gears 10, 12 grooves 18, 20 are formed with their respective depths smaller than the height of teeth of the gears 10, 12 and a cable 16 is placed in the center of the peripheries thereof. At the pinion gear 12, hand-winding handle 22 is provided and the cable 16 is guided through a guide pulley 24 arranged on the base member 14 and stored in the groove 18 so as to be placed along not less than half the periphery of the gear wheel 10. By the constitution, because the cable 16, rolled along the groove 18 of the gear 10, undulates in accordance with irregularity of a tooth part, the cable 16, being firmly held, can be prevented from slipping even when sudden tensile force or the like is applied.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for winding up a cable using a combination of two gears each having a groove on the outer periphery into which the cable is inserted. This cable hoisting device can be used, for example, to pull up cables used in various physical laminations from inside the polling hole.

[Prior art] In various types of physical logging, a logging probe connected to a cable is inserted into a polling hole to a predetermined depth, and then the physical properties of the ground are investigated either continuously while being pulled up or by stopping the pulling operation at regular intervals. Measuring the value. In the conventional technology, a winch (winding machine) is used to send out and wind up the cable. In other words, a cable longer than the required length is wound around the drum of the winch, and the cable with the laminated probe attached is inserted into the polling hole through the sheath of the "tower" installed above the borehole. The laminated probe is moved by rotating the drum, and the drum is rotated manually or electrically.

Here, the cable not only has the function of simply supporting the well logging probe, but also has the function of connecting the well logging probe and the measuring device on the ground surface through internal electric wires, and transmitting and receiving electrical signals.

Therefore, one end of the cable is always fixed to the winch drum, and the electrical signals are transmitted via a slip ring.

The amount of cable movement is measured by detecting the number of revolutions of a cable guide sheep installed on a ``tower'' or winch.

[Problems to be Solved by the Invention] In the prior art, the proximal end of the cable is always fixed to the drum, so it is difficult to change the length of the cable.

Therefore, even in the case of shallow well logging, a winch wrapped in multiple layers must be carried to the measurement site and used, which has the disadvantage that it cannot be handled easily. Furthermore, electrical connections using slip rings have many problems in terms of reliability and are troublesome to maintain.

Furthermore, the guide sheep installed on the "yagura" or winch was simply a rotatable disk with a groove on the outer periphery, so it would slip if a sudden tensile force was applied, making it difficult to accurately cable the cable. It is not possible to measure the amount of movement. In addition, measurements are calculated using the radius from the sheep's center of rotation to the center of the cable, but as the cable is bent, the inner side contracts and the outer side stretches, so there is the problem that the measured values obtained differ depending on the cable thickness.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cable winding device that eliminates all of the drawbacks of the prior art, can be easily handled, can accurately measure the amount of cable movement, and can improve reliability.

[Means for Solving the Problems] The present invention, which can achieve the above objects, includes a combination of two gears that can mesh with each other, one gear is provided with a rotation drive means, and both gears have a This cable winding device has a groove in the center for the cable to enter, and the depth of the groove is smaller than the height of the gear.

Here, it is preferable that the groove formed at the center of the outer circumference of the gear has an inclined side wall so that the deepest part is narrower than the cable diameter.

In reality, a ratchet mechanism for preventing reverse rotation is provided on either one of the two gears, or a mechanism for varying the center distance between the two gears is provided. Furthermore, a mechanism for detecting the rotational speed of the gear and measuring the distance traveled by the cable is provided as necessary.

[Operation] A cable is placed along the groove of one (first) gear of the two gears, and the other (second) gear is meshed with the first gear. The cable can be wound up by rotating either gear manually or by a motor or the like. At this time, the cable undulates according to the unevenness of the teeth, so there is no risk of the cable slipping.

In particular, if the groove shape of the gear is made into an inverted trapezoidal cross-section so that the deepest part is narrower, the gear will fit firmly into the groove when strong tension is applied to the cable, thereby more reliably preventing the cable from slipping.

The ratchet mechanism prevents the gear from rotating backwards and prevents the cable from falling. The variable spacing mechanism between the gears makes it easy to unwind the cable, allows cables of different thicknesses to be used, and allows the cable to pass through without any problems even if it has a connector or the like in the middle.

Furthermore, the length of the wound cable can be measured based on the gear rotation speed using the gear rotation speed detection mechanism.

[Embodiment] FIG. 1 is a perspective view showing an embodiment of a cable winding device according to the present invention. This device includes a combination of two large and small gears 10.12 that can mesh with each other, each of which is rotatably supported on a base member 14. Grooves 18, 20 are formed into which the cable 16 enters, as shown in detail in FIGS. 2 and 3.
, 20 have a depth D set smaller than the tooth height H of the gear 10°12.

Further, in this embodiment, the side walls of both the grooves 18 and 20 are sloped so that the deepest part thereof is narrower, that is, the cross section is inverted trapezoidal (see FIGS. 4 and 5). Therefore, both gears 10, 12 have teeth on both sides of their outer peripheries, and they mesh with each other at the teeth.

In this embodiment, the manual winding handle 2 is attached to the small gear 12.
2 is provided. The cable 16 is guided through a guide pulley 24 provided on the base member 14, and is housed in the groove 18 along more than half the circumference of the large gear lO.

A ratchet mechanism 26 is connected to the shaft of the small gear 12.

This ratchet mechanism 26 functions to allow the small gear 12 to rotate in only one direction and prevent rotation in the opposite direction, and a commercially available member can be used as is.

Further, the small gear 12 is supported by the base member by a variable interval mechanism. This variable interval mechanism has an elongated hole provided in the base member and a tightening part that can hold the shaft of the small gear 12 at an arbitrary position, and connects the rotating shaft of the small gear 12 to the large gear 10. For example, the ratchet mechanism 26 is fixed to one end of the lever, and the lever is pinned in the middle so that it can swing freely. At the other end, use a bolt etc. to attach the base member 1.
Fixed at 4. This allows the center distance between the small gear 12 and the large gear 1O to be adjusted freely.

Furthermore, a cable movement measuring device is provided as necessary.

As shown in FIG. 4, this is achieved by connecting a rotation speed detection mechanism 28 to a gear (here, the small gear 12) provided with rotation starting means (here, the handle 22). A rotation detection mechanism 28 consisting of a combination of a disk fixed to a shaft and an optical or magnetic rotary encoder or other arbitrary angle detector,
The rotation speed (rotation angle) of the small gear 12 is detected and the lead wire 30
The distance between the rotation center of the pinion 12 and the point where the pinion 12 contacts the cable 16 is R, where the output signal is extracted from (
(See FIG. 2), the cable winding length can be obtained by performing arithmetic processing based on the output signal from the rotation detection mechanism 28.

The method of using this cable winding device is as follows. A logging probe or the like (not shown) is attached to the cable 16 and lowered into the polling hole, and the cable 16 is placed along the groove 18 of the large gear 10. If there is not enough cable, add it by inserting it into the polling hole.Cable 1
Connect the end of 6 to the measuring device. Small gear 12 to large gear l
0, and both gears 1 depending on the thickness of the cable 16.
Adjust spacing of 0.12.

As shown in an enlarged view in FIG. 5, it is preferable to set the distance so that the cable 16 is slightly deformed (undulated) by the meshing of both gears 10, 12, and this is done by a variable distance mechanism.

The preparation is now complete.

When the small gear 12 is rotated in the direction of the arrow by turning the handle 22, the large gear 10 meshed with the gear 10 also rotates, and the cable 16 is wound up.

At this time, since the side wall of the groove 18 is tapered and the deepest part is narrow, the cable 16 is strongly fitted into the groove 18 due to the force applied to the cable 16, and the cable 16 is fitted into the irregularities of the large and small gears 10 and 12. Cable 1
Even if a sudden tensile force is applied to 6, it will not slip.

Necessary measurements are taken continuously while winding the cable 16, or once after each winding of a predetermined length, the winding is stopped.

Since this device is provided with a ratchet mechanism 26,
Even if you take your hand off the handle 22, the cable 16 that has been wound up will be held in that position and will not reverse or fall due to the weight of the cable 16 or the heavy object attached to it. stop and
Measurement can be easily performed at that position.

Even if a connector or other device is installed in the middle of the cable 16, the variable interval mechanism allows the small gear 12 to be connected to the large gear l.
By separating it from O, cables can be easily passed through.

The winding length of the cable 16 is determined by the number of rotations of the gear determined by the number of rotations detection mechanism 28 and the radius of the gear to be positive -1. In other words, the position where the pinion 12 contacts the cable 16 and the pinion
If the distance from the center of rotation of 12 is calculated as R, the length of the cable passing through position A of the large gear IO (see FIG. 2) can be accurately determined. Since the value of R is constant regardless of the cable thickness, the measured value does not differ depending on the cable thickness as in the conventional technology.Incidentally, in the conventional technology, the radius from the center of the sheave to the center of the cable is Because the cable was calculated as follows, the measurement value fluctuated as the cable was bent, shrinking on the inside and stretching on the outside.

The device of the present invention can be used not only for cables coated with urethane resin or the like, but also for armored wires and the like. The gear rotation driving means may be a manual handle system as described above, or may be an electric type using a motor or the like.

[Effects of the Invention] As described above, the present invention is a cable winding device that combines two gears each having a predetermined groove formed at the center of the outer periphery. Because it undulates in response to unevenness, it is held firmly and will not slip even when a sudden tensile force is applied, and the proximal end of the cable is free (unlike when using a conventional winch) (There is no need to fix the cable to the cable), the cable length can be easily changed, and it can be directly connected to a measuring device, etc. with a connector, improving the reliability of sending and receiving electrical signals.

In particular, if the groove formed in the gear into which the cable enters is formed into an inverted trapezoidal shape, the cable will fit into the groove more strongly due to the force applied to the cable, and slippage can be more reliably prevented. Therefore, there is no error in the cable movement measured based on the gear rotation speed, and there is no error due to cable thickness.
Accurate measurement becomes possible.

Providing a ratchet mechanism or a variable interval mechanism can prevent reversing or falling even when no rotational force is applied to the gear, improving workability of measurement, and speeding up the process of passing connectors between cables, feeding out cables, etc. This makes it even easier to use.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the cable winding device according to the present invention, Fig. 2 is an explanatory view of its operation, Fig. 3 is an enlarged explanatory view of the groove formed in the gear, and Fig. 4 is an illustration of the device. The longitudinal sectional view and FIG. 5 are enlarged explanatory views showing the meshing state of the gears. 10... Large gear, 12... Small gear, 14... Base member, 16... Cable, 18.20... Groove, 2
2... Manual handle, 24... Guide pulley, 26
... Ratchet mechanism, 28... Rotation speed detection mechanism. Figure 2 Patent Applicant: Oyoyo Co., Ltd. Managing Director: Shigeru Mi Dan Figure +4 Figure

Claims (1)

[Claims] 1. A combination of two gears that can mesh with each other, one gear is provided with a rotational drive means, both gears have a groove in the center of their outer periphery into which a cable is inserted, and a groove in the groove is provided. A cable winding device characterized by a depth smaller than the tooth depth of a gear. 2. The groove formed at the center of the outer periphery of the gear has a side wall sloped so that the deepest part is narrower than the cable diameter.
The device described. 3. The device according to claim 1 or 2, wherein either one of the two gears is provided with a ratchet mechanism for preventing reverse rotation. 4. The device according to claim 1, 2 or 3, wherein one of the two gears is supported so as to be movable toward and away from the other, and a mechanism for varying the center distance between the two gears is provided. 5. The device according to claim 1, 2, 3 or 4, wherein a rotation speed detection mechanism is coupled to the gear provided with the rotational driving means.