JPH07243183A - Wire rope and wire-waving apparatus - Google Patents

Abstract

PURPOSE:To improve durability of a wire rope by increasing elongation rate of a core wire of the wire rope. CONSTITUTION:In this wire rope comprising stranding plural side wires 2 around one wavy curved core wire 1, curved shaping applied to the core wire 1 is formed in three-dimensional wavy form 7. Thereby, pitch of wavy form 7 is finely formed without finely forming pitch of a gear for forming wave to provide elongation clearance to the core wire 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rope and a corrugating device for wire strands thereof.

[0002]

2. Description of the Related Art A wire rope is formed by twisting a plurality of wires, and the minimum unit thereof is, as shown in FIGS. The wire 2 is twisted. In addition, as shown in FIG. 13, by the wire rope of the minimum unit as described above,
There is a core strand 4 and a side strand 5 which are formed by twisting six side strands 5 around one core strand 4.

Regarding the minimum unit wire rope shown in FIGS. 10 to 12, the core wire 1 remains straight, while the side wire 2 is twisted at a constant pitch. The fact that the core wire 1 is a straight line means that when the tip portion of this wire rope is unraveled as shown in FIG.
It can also be seen from the fact that the side wire 2 is unraveled with the twist habit 3 attached, but the core wire 1 remains straight.

When a load is applied to such a wire rope, since the core wire 1 has a smaller elongation than the side wire 2, the core wire 1 is broken first and the life of the wire rope is reached.

Also in the wire rope composed of a plurality of strands 4, 5 as shown in FIG. 13, since the core strand 4 is linear, the elongation rate is smaller than that of the side strand 5.

Therefore, in order to increase the elongation rate of the core wire 1 and the core strand 4 and improve the durability of the wire rope, the applicant of the present invention, as shown in FIG. It has already been proposed that shaping is effective (see JP-A-64-40687 and JP-A-1-104888).

In the wire rope in this case, as shown in FIG. 14, when the tip portion is unraveled, the core wire 1 is not twisted, but only the corrugations 6 are left and the side wire 2 is twisted 3. Appears as attached.

Regarding the above-mentioned shaping, there is a case of a spiral shape or a combination of a corrugated shape and a spiral in addition to a simple corrugated shape.
It is disclosed in the upper right column of the page.

[0009]

As shown in FIGS. 10 and 11, the core wire 1 is surrounded by the side wire 2, and the outer diameter of the side wire 2 is kept within a certain standard. The portion of the corrugation 6 of No. 1 has no room to enter formally when it is twisted to the wire rope, but in reality, due to the looseness of the side wire 2, a part of the corrugation 6 of the core wire 1 is separated from the side wire 2. It penetrates into a slight gap between the core wires 1 to make room for elongation.

Therefore, when the corrugated wire 6 is attached to the core wire 1 as described above, the elongation rate is improved, and the durability of the wire rope can be greatly improved. Further, the durability of the wire rope as shown in FIG. 13 in which the strands 4 and 5 having the core wire 1 having the corrugated shape 6 as described above are twisted is also improved.

As a means for further improving the durability of these wire ropes, it can be considered as one effective means to further reduce the pitch of the corrugations 6 of the core wire 1. There is a problem that the pitch becomes small and its production becomes difficult.

As another means for improving the elongation of the core wire, it is conceivable that the curved shape is a combination of a corrugated shape and a spiral shape, as shown in Japanese Patent Laid-Open No. 104884/1989. However, when the pitch of the spiral is made as small as the waveform, the wire becomes a coil and it becomes difficult to twist it as a wire rope. In addition, when the pitch of the spiral is increased, the degree of contribution to the improvement of the elongation is reduced. After all, it is hardly expected that the elongation rate will be improved by the curve shaping by the combination of the spiral and the waveform.

Therefore, in each invention of this application, the corrugated shape of the core wire is improved so that the elongation rate of the core wire when twisted as a wire rope is further improved and the durability of the wire rope is improved. The task is to do.

[0014]

In order to solve the above-mentioned problems, the structure of the basic invention of this application is such that a plurality of side wires are provided around one core wire having a corrugated curve shape. In the wire rope formed by twisting, the curved shape applied to the core wire is such that a two-dimensional waveform bent at a constant pitch in a certain plane has an axis intersecting with the plane at a pitch different from the pitch. The configuration is a three-dimensional waveform formed by bending into a waveform having unevenness in the direction.

Further, a plurality of side wires are twisted around one core wire to form a core strand and a side strand, and a plurality of side strands are twisted around the core strand, and the core strand and each side are formed. In a wire rope in which a corrugated curve is formed on each core wire that constitutes a strand, the curvilinear shape applied to the core wire is a two-dimensional corrugation bent at a constant pitch in a plane. A three-dimensional corrugation formed by forming corrugations at a pitch different from the pitch in the direction of an axis intersecting the plane may be adopted.

The side wire forming the core strand in this case can also be curved with the same waveform as that of the core wire.

Further, in a wire rope in which a plurality of side wires are twisted around one core strand, and all the wires constituting the core strand are corrugated and curved, the respective wires of the core strand are Is formed by bending a two-dimensional waveform bent at a constant pitch in a plane into a waveform having irregularities in the direction of an axis intersecting the plane at a pitch different from the pitch. It can be configured as a three-dimensional waveform.

In any of the above cases, the curved shape of the core wire is bent at a constant pitch in a plane.
The three-dimensional waveform may be a three-dimensional waveform formed by bending at a pitch different from the pitch into a waveform having irregularities in the direction of the axis orthogonal to the plane.

In addition, as a device for performing such a complex corrugation as described above, a pair of corrugated gears are intermeshed with each other, and a wire is passed between the gears to form a wavy curve on the wire. It is composed of a combination of the first and second corrugated gear units, and the tooth pitches of the two gear units are made different from each other, and the wire outlet of the first corrugated gear unit and the second corrugated unit are provided. The two gears are oriented so that the wire inlets of the gear device are opposed to each other and the axis of the gear of the second corrugated gear device has a certain angle with respect to the axis of the gear of the first corrugated gear device. Is changed.

[0020]

In the wire rope according to each of the above inventions, the corrugation formed on the core wire constituting the wire rope is formed by bending the two-dimensional corrugation in the direction of the axis intersecting the two-dimensional plane. Since the corrugated gear has a pitch similar to that of the conventional one, the pitch of the corrugated bending of the core wire is remarkably small and the waveform exists in the three-dimensional space. The margin to fit in the gap with the side wire around it increases. Therefore, the elongation rate of the core wire is increased in the twisted state of the wire rope, and the durability of the wire rope is improved.

Since there is a difference between the pitch of the waveform when bent two-dimensionally and the pitch when bent three-dimensionally,
In the latter case of bending and corrugating, it is prevented that the corrugated portion previously applied to the teeth of the gear is pulled in.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The wire rope of the first embodiment shown in FIGS. 1 to 3 has six side wires 2 around one core wire 1.
This is the most basic wire rope twisted together. The core wire 1 is provided with the three-dimensional corrugation 7 referred to in the present invention in advance, and the side wire 2 is linear. In order to distinguish the two, the core wire 1 to which the above-mentioned waveform 7 is given in advance is indicated by a cross mark in the drawing, and is distinguished from the linear side wire 2.

With respect to this wire rope, when the tip portion is unraveled in the same manner as in the conventional case, as shown in FIG. 3, the core wire 1 retains the three-dimensional corrugation 7, and the side wire 2 has the twisted strands 3. Appears as a stuff.

The above-mentioned three-dimensional waveform 7 is applied by a corrugating device as shown in FIG. This corrugating device comprises a combination of a first corrugating gear device 8 and a second corrugating gear device 9.

The first corrugated gear device 8 is provided with two vertical gear shafts 12 on an upper surface of a base 11, and a pair of spur gears 13, 13 rotatably mounted on the gear shafts 12 mesh with each other. The inlet wire guide member 14 is provided in front of the meshing portion, and the outlet wire guide member 15 is provided in the rear. A guide hole 16 is provided in each of the guide members 14 and 15.

The second corrugating gear device 9 is installed on the outlet side of the first corrugating gear device 8 and is provided with two horizontal gear shafts 12 'on the side surface of the base 11'. A pair of spur gears 13 'and 13' rotatably attached to each other are meshed with each other. An inlet wire guide member 14 'is provided in front of the meshing portion, and its guide hole 16' is opposed to the guide hole 16 of the outlet wire guide member 15 of the first corrugated gear device 8. Further, behind the meshing portion, there is provided an outlet wire guide member 15 'having a guide hole 16' similar to the above.

The spur gear 1 of the second corrugated gear unit 9
The tooth pitch of 3 is set to be slightly smaller (or larger) than the tooth pitch of the spur gear 13 of the first corrugating gear device 8.

In the corrugating device as described above, the wire 17 is connected to the entrance side wire guide member 1 of the first corrugating gear device 8.
4 through the meshing parts of the spur gears 13, 13 and then through the wire guide member 15 on the outgoing side, through the meshing parts of the spur gears 13 ', 13' of the second corrugating gear device 9, and further on the outgoing side. It is pulled out from the wire guide member 15 'and wound by a winding device (not shown).

When the winding device is driven, the wire 17
Each spur gear 13, 13 and 13 'of each corrugating device 8, 9;
13 'is rotated and the waveform is shaped at the same time.

Assuming that the above corrugating device is present in the space of the rectangular coordinate axes of the X axis, Y axis, and Z axis as shown in FIG. Corrugation is performed in a plane perpendicular to 12, that is, in the X and Y planes to form a two-dimensional waveform 7 '.

When the wire 17 enters the second corrugating device 9, the two-dimensional waveform 7'existing on the XY plane has unevenness in the Z-axis direction. Corrugation is applied to form a three-dimensional waveform 7.

In the above corrugating process, the spur gears 13, 13 and 13 ', 1 of both corrugating gear units 8 and 9 are
Assuming that the pitches of 3'are equal, the waveform of the wire 17 previously attached when the wire leaves the first corrugated gear device 8 and enters the second corrugated gear device 9, Device 9
Of the spur gear 13 'may be shaped in the same direction (that is, again in the XY plane) and at the same pitch.

However, if there is a slight difference in pitch between the two, such fitting is avoided and the two-dimensional waveform 7'is surely bent in the Z-axis direction, resulting in a complex three-dimensional shape. The target waveform is 7.

The above-mentioned three-dimensional waveform is a two-dimensional waveform 7'applied by the first corrugating gear device 8 as shown in the XYZ coordinate axis space of FIG. 5 (see the projection view of the XY plane).
P '(the pitch between the black dots in the figure) and the pitch P (the pitch between the white points in the figure) of the waveform (see the projected view of the ZX plane) applied by the second corrugating gear device 9 ) And are combined. The combined pitches are unequal pitches Q ₁ , Q ₂ , Q ₃ in the three-dimensional space (pitch between the black point and the white point), but the unequal pitches Q ₁ , Q ₂ , Q ₃ ... Is about 1/2 of the pitch P or P'on average.

The two-dimensional waveform 7'is replaced by the three-dimensional waveform 7
In the above embodiment, when it is deformed into a shape such that it is bent so as to have unevenness in the direction of the Z axis orthogonal to the XY plane,
It can also be bent in the direction of an axis intersecting with the XY plane at a constant angle.

The curved shape imparted to the core wire 1 is such that the two-dimensional waveform 7'bent at a constant pitch in a certain plane as described above is at a pitch different from the above-mentioned pitch, and is orthogonal or constant to the plane. It can be said that the three-dimensional waveform 7 is formed by bending into a waveform having unevenness in the direction of the axis intersecting at an angle.

The wire rope of the second embodiment shown in FIG. 6 is obtained by twisting six side strands 5 around one core strand 4, and each of these strands 4 and 5 is Also, six side wires 2 are twisted around one core wire 1. Each strand 4,
The core wires 1 of 5 all have the above-mentioned three-dimensional corrugations 7.

The wire rope of the third embodiment shown in FIG. 7 uses the core wire 1 and all the side wires 2 constituting the core strand 4 having the above-mentioned three-dimensional waveform 7. The side strands 5 are the same as those of the second embodiment.

In the wire rope of the fourth embodiment shown in FIG. 8, all the wires 1, 2 constituting the core strand 4 are 3
It has a three-dimensional corrugation 7, around which twelve side wires 2'are twisted.

The wire rope of the fifth embodiment shown in FIG. 9 comprises a core strand 4'formed by twisting three core wires 1 and nine side wires 2'twisted around it. is there. The above core wires 1 are all provided with the above-mentioned three-dimensional corrugations 7.

In the third to fifth embodiments, all the wires forming the core strand 4 are provided with the three-dimensional corrugation 7. Therefore, the elongation of these wires themselves and the core strand 4 The elongation rate of 4, 4'is also improved.

Of the form of strands shown in FIG.
When a comparative durability test was carried out in which a load of 10 kg was applied to one end of the wire rope and the wire rope was moved vertically, an attempt was made to perform a comparative durability test. When all the wires were straight, the core wire was broken at about 9000 times. A core wire of all strands with a two-dimensional corrugation (improved conventional example) has approximately 400,000 cycles,
The core wire of all the strands to which the three-dimensional corrugation 7 was given (of the example of the present application) obtained durability of 600,000 times.

[0043]

As described above, in each invention according to this application, the corrugation of the core wire has a two-dimensional corrugation on a certain plane, and further has corrugations in the direction of the axis intersecting the plane. Since the waveform is compounded into a three-dimensional waveform by being bent in the direction of, the pitch of the waveform of the corrugating device can be made extremely small even if the pitch of the gear of the corrugating device is the same as the conventional one. Moreover, coupled with the fact that the core wire is bent in three dimensions, there is more room to enter the gap between the core wire and the side wire that exists around the core wire, and the elongation rate of the core wire when twisted as a wire rope increases. growing. Therefore, the durability of the wire rope can be improved.

Further, in the corrugating device, when the two-dimensional waveform is changed to the three-dimensional waveform, the pitch is changed, so that the two-dimensional waveform previously shaped fits into the teeth of the subsequent gear. Can be prevented and a three-dimensional waveform can be surely applied.

[Brief description of drawings]

FIG. 1 is an enlarged end view of the first embodiment.

FIG. 2 is a partially enlarged front view of the above.

FIG. 3 is a front view showing a state in which a part of the above is unraveled.

FIG. 4 is a perspective view of a corrugating device.

FIG. 5 is an explanatory diagram of a three-dimensional waveform.

FIG. 6 is an enlarged end view of the second embodiment.

FIG. 7 is an enlarged end view of the third embodiment.

FIG. 8 is an enlarged end view of the fourth embodiment.

FIG. 9 is an enlarged end view of the fifth embodiment.

FIG. 10 is an enlarged end view of a conventional example.

FIG. 11 is a partially enlarged front view of the above.

FIG. 12 is a front view showing a state in which a part of the above is unraveled.

FIG. 13 is an enlarged end view of another conventional example.

FIG. 14 is a front view showing a state in which a part of the improved version of the conventional example is loosened.

[Explanation of symbols]

 1 core wire 2, 2'side wire 3 twisted strand 4, 4'core strand 5 side strand 6 waveform 7 three-dimensional waveform 7 'two-dimensional waveform 8 first corrugated gear device 9 second corrugated gear device 11, 11 'Base 12, 12' Gear shaft 13, 13 'Spur gear 14, 14' Inlet wire guide member 15, 15 'Outgoing wire guide member 16, 16' Guide hole 17 Wire

Claims (6)

[Claims] 1. In a wire rope formed by twisting a plurality of side wires around one core wire having a corrugated curve shape, the curve shape applied to the core wire comprises:
A two-dimensional waveform bent at a constant pitch in a certain plane,
A wire rope, which is a three-dimensional waveform formed by bending a waveform having irregularities in a direction of an axis intersecting the plane at a pitch different from the pitch. 2. A core strand and a side strand are formed by twisting a plurality of side wires around one core wire, and a plurality of side strands are twisted around the one core strand. And a wire rope in which each core wire constituting each side strand is curved in a corrugated shape, the curved shape applied to the core wire is a two-dimensional corrugated bent at a constant pitch in a certain plane. Is a three-dimensional waveform formed by bending at a pitch different from the above into a waveform having irregularities in the direction of an axis intersecting the plane. 3. The side wire forming the core strand,
The wire rope according to claim 2, wherein the wire rope has a curved shape having the same waveform as that of the core wire. 4. A wire rope in which a plurality of side wires are twisted around one core strand, and all of the wires forming the core strand are corrugated and curved. Is formed by bending a two-dimensional waveform bent at a constant pitch in a plane into a waveform having irregularities in the direction of an axis intersecting the plane at a pitch different from the pitch. A wire rope having a three-dimensional wave shape. 5. The curving of the core wire has a two-dimensional corrugation bent at a constant pitch in a plane, and has irregularities in a direction of an axis orthogonal to the plane at a pitch different from the pitch. The wire rope according to any one of claims 1 to 4, which is a three-dimensional waveform formed by bending into a waveform. 6. A pair of first and second corrugating gears, wherein a pair of corrugating gears are meshed with each other and a wire is passed between the gears to form a wavy curve on the wire. It is composed of a combination of devices, the tooth pitches of the both gear devices are made different, and the wire outlet of the first corrugating gear device and the wire inlet of the second corrugating gear device are opposed to each other, and the first A wire corrugating device, characterized in that the directions of both the devices are changed so that the axis of the gear of the second corrugating gear device has a constant angle with respect to the axis of the gear of the corrugating gear device.