JPH0632478U - Wire rope tension winding device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a wire rope tension winding device to which a tension necessary for correcting a winding tendency of a wire rope is applied. [Structure] A tension drum around which a wire rope is wound a plurality of times is provided between a guide sheave for input side guidance and a guide sheave for output side guidance, and the wire is driven by forward or reverse rotation of a hydraulic motor of this tension drum. The rope holding mechanism is provided with a pair of pressing rollers that allow the rope to be fed out and that applies or releases tension to the wire rope by contacting and separating it from the tension drum. A pair of swing brackets arranged to face each other in a manner of pivotally supporting the ends, a traction spring means stretched between the swing brackets to separate the pressure roller from the tension drum, and each swing bracket. It is composed of a cylinder that presses the pressing roller against the tension drum.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for winding a thick wire rope in a tension state on a wire drum such as a large tower crane or a crawler crane.

[0002]

[Prior art]

 The wire ropes of this type of crane are usually used as a pair, but it is desirable that each wire rope be tensioned as much as possible so that there is no curl so that the suspended load does not rotate. For this reason, the new wooden rope is wound around the wooden drum while applying tension to the wire drum side of the crane to be used to correct the curl of each wire rope.

A conventional tension winding device that winds a wire rope while straightening it in this way is configured, for example, as shown in FIG. The wooden drum 101 is composed of a winding drum 102 around which a wire rope is wound, flange-shaped side plates 103 and 103 provided on both sides of the winding drum 102, and a shaft hole 104 provided at the shaft center of the winding drum 102. Has been done. A shaft 105 is inserted into the shaft hole 104 of the wooden drum 101, and drum fixing hardwares 106 and 106 are provided on both ends of the shaft 105. The drum fixing hardwares 106 and 106 are provided on both sides via screw means or the like. The plates 103 and 103 are attached to each other. Further, both ends of the shaft 105 protruding from the drum fixing hardware 106, 106 are rotatably supported by bearings 108, 108 provided on the upper ends of the drum bases 107, 107, respectively. Further, the shaft 105 is provided with a handle 109 for rotating the wooden drum 101 around one shaft and a brake 110 for limiting the rotation of the wooden drum 101 around the other shaft. The brake 110 includes a disk 111 that rotates together with the shaft 105, a caliper (friction member) 112 that engages with the disk 111 to reduce the rotational force, and a manual adjusts the engagement of the caliper 112 with respect to the disk 111. It is composed of a torque limiter 113 with a handle.

In the tension winding device having the above-described configuration, the wire rope wound around the wooden drum 101 is forcibly fed out by pulling the wire rope wound around the wooden drum 101 to the wire drum side of a crane (not shown) while the brake 110 is operating, Take up the wire rope with a certain tension and wind it around the wire drum. If the wire rope is initially wound around the wooden drum 101 or if the wire rope becomes loose during winding on the wire drum side of the crane, the brake 110 should be activated. In the released state, the handle 109 can be rotated to wind it on the wooden drum 101 side.

[0005]

[Problems to be solved by the device]

 However, in the conventional tension winding device described above, a thick wire rope having high rigidity and being hard to return to the original shape once deformed is applied with the tension necessary to correct the winding habit. It was insufficient. In addition, when the wire rope is tensioned and the initial winding work is performed on the wooden drum, or when the wire rope caught on the wire drum side of the crane is irregularly wound, the tension is applied with the tension applied. It was not possible to rewind a part of it to the wooden drum side and perform the correction winding work again. Therefore, an object of the present invention is to provide a tensioning and winding device for a wire rope which can improve such a conventional technique.

[0006]

[Means for Solving the Problems]

 The present invention for solving the above-mentioned problem is interposed between two drums, one end side and the other end side of which are respectively connected to each other, and the wire rope is tensioned between the drums. A wire rope tension winding device that winds and unwinds each other, one end side of which is connected to one drum, and a wire sheave is wound between the guide sheave for input side guidance and the other end. The tension drum is wound around the wire rope between each guide sheave and the guide sheave for guiding the output side where the wire rope is wound between the other side and the other drum. The tension drum is connected to a hydraulic motor, and the wire rope is fed to each drum side by the normal rotation or reverse rotation of the tension drum driven by the hydraulic motor. In addition to the function of the tension drum, a pair of pressure rollers are attached to and separated from the tension drum by the expansion and contraction of the cylinder at a position adjacent to the tension drum to apply tension to the wire rope. In addition, a rope pressing mechanism for releasing or releasing the rope is provided.The rope pressing mechanism is configured such that the pressing rollers are expandably and contractably mounted on the tip ends of a pair of rocking brackets that are arranged to face each other with the inner end pivotally supported. At the same time, the traction spring means that constantly urges the above-mentioned pressure rollers to oscillate in the expanding direction is stretched on the base end side of this swing bracket. When the cylinders are moved closer to each other, the pressing force of the cylinder against the swing bracket resists the pulling force of the pulling spring means to swingly press each pressing roller in the radial contraction direction, and the cylinder The pressure rollers which are 支弾 in is in pressure-contact with the wire rope tensioning drum.

[0007]

【Example】

 A wire rope tension winding device according to the present invention will be described below with reference to the embodiments shown in FIGS. On one side of the base 1, two sets of pedestals 3 and 3 on which wooden drums 2 are rotatably mounted are arranged side by side, and on the other side, a wire rope L wound around each wooden drum 2 is installed. Two sets of tension take-up devices 4 and 4 are arranged side by side for tensioning. The pedestal 3 is connected to each other by two horizontal members 6 and 6 which are parallel to each other between upper ends of a plurality of columns 5 which are erected from the base 1. Roller shafts 8, 8 rotatably supported by bearings 7 are constructed between the cross members 6, 6. The wooden drum 2 mounted on the mounting table 3 is rotatably supported by the roller shafts 8, 8. When the diameter of the wooden drum 2 is small, the horizontal members 6 and 6 can be adjusted by changing the mounting position of the roller shafts 8 and 8 on the horizontal members 6 and 6 on one side. A plurality of spare holes 9 are formed.

The tension winding device 4 includes a stationary guide sheave 10 located on the input side near the wooden drum 2, a swinging guide sheave 12 located on the output side near a wire drum of a crane or the like (not shown), and Tension drums 11 located between the stationary guide sheave 10 and the swing guide sheave 12 are arranged in parallel at predetermined intervals. The stationary guide sheave 10 and the swing guide sheave 12 are formed by winding the wire rope L in a circular arc shape with a predetermined tension and guiding the wire rope L without winding the wire rope L. The winding width is wide so that the winding wire rope L can be wound. The stationary guide sheave 10 and the tension drum 11 are rotatably attached to the rotary shafts 14 and 15 mounted on the mounting plate 13 erected from the base 1 via bearing members. There is.

The details of the driving portion of the tension drum 11 are shown in FIG. 4. A large-diameter gear 16 is integrally mounted on the back surface of the tension drum 11, and the large-diameter gear 16 rotates the hydraulic motor 17. The pinion gear 18 attached to the shaft is in mesh with each other, and the rotation of the hydraulic motor 17 drives the tension drum 11 to rotate normally or reversely. A rope pressing mechanism 19 for pressing the wound wire rope L is provided on the tension drum 11. As shown in detail in FIG. 5, the rope pressing mechanism 19 has a pair of left and right swing brackets 20 arranged in an opposed manner, and each swing bracket 20 is a first central arm protruding inward from the center. A tip end side of 21 is pivotally supported by a pin, and a piston rod 23a of a cylinder 23 is pivotally supported by a pin at the tip end side of a second central arm 22 protruding outward from the center.

It should be noted that the cylinder 23 is housed in a cylinder case, and the cylinder case is assembled with an angular material in a rectangular frame shape and attached to a rectangular frame 24 fixed to the base 1. A locking shaft 26 is pivotally supported on the tip end side of the upper arm 25 of the swing bracket 20, and a compression coil spring 27 for pulling whose ends are locked to the locking shaft 26 is provided on the other side. It is stretched between the upper arm 25. A pressing roller 29 formed of an elastic material such as a rubber material is pivotally supported on the tip end side of the lower arm 28 of the swing bracket 20 so as to rotate. Further, a stopper 30 is provided on the tip side of the lower arm 28 so as to prevent the pressing rollers 29 from approaching each other more than necessary.

The rope pressing mechanism 19 having the above-described structure is generally in the raised position with the pistons 23 a shortened by normally operating the cylinders 23, and the pulling force of the compression coil spring 27 causes the first central arm 21 to move. The swing bracket 20 swings around the pivot portion as a fulcrum, and the pressing rollers 29, 29 are biased outwardly and obliquely upward so as to separate from each other, and the pressing force on the wire rope L is released. During use, when each cylinder 23 is operated to extend the piston rod 23a, the entire body descends and the swing bracket 20 swings against the pulling force of the compression coil spring 27, and the pressure rollers 29, 29 are pushed. So that they approach each other, the wire rope L wound around the tension drum 11 can be pushed downward to apply tension.

The rocking guide sheave 12 is supported by a portal frame 32 via a sheave cushion 31. This sheave cushion 31 has a spring built into the case, and a piston rod 31a supported by the spring is projected from the case. The upper end side is pivotally supported by a gate-shaped frame 32 and is suspended from the lower end. The swing guide sheave 12 is pivotally supported at the tip of the side piston rod 31a via a mounting shaft 33. Further, a first link 34 having both ends pivotally supported by pins is provided between the mounting shaft 33 and the mounting plate 13, and both ends are pinned between the mounting shaft 33 and the base 1. A second link 35 pivotally supported by is provided. Therefore, the rocking guide sheave 12 is normally pressed downward by the elastic force of the sheave cushion 31 as shown by the solid line in FIG. 1, and when the wire rope L is stretched during use, the elastic force is exerted. By virtue of this, the wire rope L is swung to the upper right as shown by the chain line, and tension can be applied to the wire rope L.

[0013]

[Effect of device]

 As is apparent from the above-described embodiments, in the wire rope tension winding device according to the present invention, the pair of pressing rollers urged and supported by the pressing force at the time of extension of each cylinder attached to the rope pressing mechanism. However, since the wire rope wound multiple times around the tension drum is pressed against the tension drum with a strong force, it is also sufficiently rigid, and it is sufficient even for thick wire ropes with plasticity that are difficult to return once deformed. It is possible to wind the wire rope to the side of the crane with the proper tension applied to correct the winding habit of the wire rope, and if irregular winding occurs during the winding, rewind once to prevent irregular winding. You can re-engage in the corrected state. Further, the tension at the time of winding and rewinding can be arbitrarily set by adjusting the hydraulic pressure of the hydraulic motor that drives the tension drum. In addition, this device is installed at an arbitrary position in the middle of the wire rope wound around the drum and fed, and the desired tension is applied to the wire rope. It can also be used during winding to achieve accurate and quick winding.

[Brief description of drawings]

FIG. 1 is a front view of a wire rope tension winding device according to an embodiment of the present invention.

FIG. 2 is a plan view of the tension winding device of FIG.

FIG. 3 is a right side view of the tension winding device of FIG.

FIG. 4 is a longitudinal sectional view of a main part of the tension winding device of FIG.

5 is a perspective view of a rope pressing mechanism of the tension winding device of FIG. 1. FIG.

FIG. 6 is a side view of a conventional wire rope tension winding device.

[Explanation of symbols]

1 Base 2 Wooden Drum 3 Mounting Platform 4 Tension Winding Device 5 Strut 6 Horizontal Material 7 Bearing 8 Roller Shaft 9 Spare Hole 10 Stationary Guide Sheave 10 Tension Drum 12 Swing Guide Sheave 13 Mounting Plates 14, 15 Rotating Shaft 16 Large Diameter Gear 17 Hydraulic motor 18 Pinion gear 19 Rope holding mechanism 20 Swing bracket 21 First central arm 22 Second central arm 23 Cylinder 23a Piston rod 24 Square frame 25 Upper arm 26 Locking shaft 27 Compression coil spring 28 Lower arm 29 Pressing roller 30 Stopper 31 Sheave Cushion 31a Piston Rod 32 Gate Frame 33 Mounting Shaft 34 First Link 35 Second Link L Wire Rope

Claims (1)

[Scope of utility model registration request] 1. A wire rope is interposed between two drums, one end side and the other end side of which are connected to each other, and the wire rope is placed in a tensioned state to wind and rewind each other. Which is a tension winding device for a wire rope, wherein a guide sheave for guiding an input side between which one end side is connected and a wire rope is wound between the other side drum and another drum connected to the other end side. A tension drum around which the wire rope between the guide sheaves is wound multiple times is provided between the guide rope and the output-side guide sheave on which the wire rope is wound. The wire rope can be fed out to each of the drum sides by connecting the hydraulic motor to the tension drum in the forward or reverse direction to drive the tension drum. At a position adjacent to the drum, a rope pressing mechanism is provided which approaches or separates from the tension drum by expansion and contraction of the cylinder, and a pair of attached pressure rollers comes in contact with and separates from the tension drum to apply or release tension to the wire rope. In this rope pressing mechanism, the pressing rollers are mounted so as to be expandable / contractible on the distal ends of a pair of swing brackets that are arranged to face each other in such a manner that the inner end is pivotally supported. A traction spring means for constantly urging and urging the pressure rollers in the expanding direction is stretched on the side, and the respective pressure rollers are brought closer to the tension drum by the extension of the cylinder, and the pressing force of the cylinder against the oscillating bracket is provided. To urge the pressure rollers to swing in the diameter reducing direction against the traction force of the traction spring means, so that the pressure rollers supported by the cylinders move the wire. Tensioning retractor wire rope characterized in that for pressing the rope tension drum.