JP3688426B2 - Turbulence prevention device for crane winch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for preventing wire winding by a crane winch.
[0002]
[Prior art]
A winch is mounted on the self-propelled crane, and the wire is wound or fed by the winch. The wire fed out from the winch is wound around a sheave attached to the boom and is suspended from the tip of the boom. A hanging hook is suspended from the suspended wire, and when the wire is wound by the winch while maintaining the extended posture and the undulating posture of the boom, the lifting hook rises toward the tip of the boom. Further, when the wire is fed out by the winch, the lifting hook is lowered so as to be separated from the tip of the boom. Therefore, crane work can be performed by hooking a load on the lifting hook.
[0003]
A self-propelled crane generally includes a main winding winch and an auxiliary winding winch. The wire fed from the main winding winch is wound multiple times between the sheave attached to the boom head of the boom and the sheave of the hook block having the lifting hook, and the lifting hook is moved up and down from the tip of the boom. Let it hang freely. On the other hand, the wire drawn out from the auxiliary winding winch is hung on the auxiliary sheave of the sheave bracket projecting from the boom head, is suspended from the tip of the boom, and is used for single rope crane work with a high lifting speed.
[0004]
2. Description of the Related Art Conventionally, in order to prevent the winding of a wire by a winch drum, a turbulent winding prevention roller arranged to be pressed against a wire wound around the winch drum is known. This anti-rolling roller is generally urged toward the winch drum side by a spring force, and is always pressed against the wire wound around the winch drum, thereby enabling uniform winding of the wire around the winch drum. .
[0005]
FIG. 5 schematically shows a conventional example of a main winding winch and an auxiliary winding winch provided with a turbulent winding prevention roller. As shown in the figure, the main winding winch 100 and the auxiliary winding winch 102 are arranged side by side in parallel in the lateral direction (arranged side by side in the width direction of the vehicle body), and are erected on the swivel 120. A pair of support frames 104 and 106 that support the boom so that it can be raised and lowered are attached and supported between the support frames 104 and 106.
[0006]
Each winch 100, 102 is provided with a random winding prevention roller 108, respectively. Each turbulent winding prevention roller 108 is always pressed against a wire wound around a winding drum (drum) 112 of the winches 100 and 102 by a pair of springs 110 and 114. The springs 110 and 114 are respectively attached to the outer surfaces of the flange portions 111 and 111 on both sides of the drum 112 (that is, both sides of the winch 100 and 102), and a spring force is applied to both ends of the random winding prevention roller 108. The turbulent winding prevention roller 108 is urged toward the drum 112 side.
[0007]
[Problems to be solved by the invention]
By the way, when the springs 110 and 114 for applying the urging force to the random winding prevention roller 108 are provided on both sides of the winches 100 and 102 in this way, as shown in FIG. 5, the main winding winch 100 and the auxiliary winding winch 102, Are arranged in parallel and adjacent to each other in the lateral direction, springs 110 and 114 are interposed in the space between the main winding winch 100 and the auxiliary winding winch 102, and the main winding winch 100 and the auxiliary winding winch 102 are separated from each other. The width dimension W of the whole winch device becomes larger by the arrangement space of the springs 110 and 114. Therefore, the width dimension of each winch 100, 102 (drum 112) cannot be set larger than this, and the winding amount of the wire may be limited. Further, with this configuration, if the width dimension of each winch 100, 102 (drum 112) is to be set large, the separation distance between the support frames 104, 106 that support the winch 100, 102 is set large, etc. The design of these members is forced to change, and various problems such as an increase in the vehicle width are induced.
[0008]
Further, when the springs 110 and 114 are interposed between the winches 100 and 102, the winches 100 and 102 are shifted from the center between the support frames 104 and 106 to the side (outside in the width direction of the vehicle body). Therefore, the wire extending along the vicinity of the approximate center between the support frames 104 and 106 is wound around the winches 100 and 102 from the side (the fleet angle becomes large). Therefore, it is difficult to uniformly wind the wire.
[0009]
In addition, by providing the springs 110 and 114 not in both sides of the winches 100 and 102 but in the space between the support frames 104 and 106 removed from the winches 100 and 102 (for example, the space below the winches 100 and 102), It is also conceivable that the winches 100 and 102 are positioned near the center between the support frames 104 and 106 to solve the above-described problem. However, since various driving devices and members such as a mechanism for raising and lowering the boom are arranged in the space between the support frames 104 and 106, a space for installing the springs 110 and 114 is secured between the support frames 104 and 106. Doing so is not preferable because it limits the degree of freedom in designing other devices and members.
[0010]
The present invention has been made paying attention to the above circumstances, and the object of the present invention is to limit the degree of freedom of design of other members and devices and to arrange two winches as close to the center of the support frame as possible. An object of the present invention is to provide an anti-turbulence prevention device that is attached so as to be arranged and prevents the anti-turbulence caused by the winch.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a turbulent roll prevention device for a winch for a crane according to the present invention has a rotating shaft, two winch drums juxtaposed adjacent to each other in the axial direction of the rotating shaft, and the 2 Two springs disposed on one side in the rotational axis direction of the region where the two winch drums are disposed, two anti-rolling rollers disposed opposite to the winding cylinders of the two winch drums, an outer shaft, An inner shaft inserted through the outer shaft, the outer shaft is connected to one end of the anti-turbulence prevention roller, and the inner shaft is connected to the other end of the anti-turbulence prevention roller, The prevention roller is supported in a swingable state capable of moving toward and away from the winding drum of the winch drum, and the spring force of the one spring is transmitted to the outer shaft, By transmitting the spring force of one of the springs to the inner shaft, a spring force is applied to both ends of the turbulent winding prevention roller, and the turbulent winding prevention roller is urged toward the winding drum side of the winch drum. Biasing force transmission means.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 4 shows a wheel crane (rough terrain crane) 1. The wheel crane 1 is provided with a dual-purpose cab (hereinafter referred to as a cab) 2 that can be used for both crane work and traveling operation, and travels with the boom 8 tilted down to the lower side of the cab 2. Can do. As a result, a sufficient lateral field of view during traveling can be secured, and the center of gravity of the vehicle body can be lowered, so that the stability of the vehicle body during traveling can be improved.
[0013]
The wheel crane 1 includes a carrier 1a as a traveling vehicle body having wheels 5, and a revolving body 1b mounted on the carrier 1a so as to be capable of turning. The carrier 1 a includes a body frame 4, and a swivel base 6 constituting a base of the swivel body 1 b is installed on the vehicle body frame 4 via a swivel bearing 3. In addition, the swivel body 1b is configured such that the cab 2, a crane device having the telescopic boom 8, and a support frame 10 that supports the boom 8 so that it can be raised and lowered are installed on the swivel base 6.
[0014]
The support frame 10 has a pair of support side plates 10a and 10a that are positioned to face each other. Each support side plate 10a, 10a is erected in a state where the front portion is fixedly supported on the swivel base 6.
[0015]
On the rear upper side of the support frame 10, a main winding winch 20 and an auxiliary winding winch 22 equipped with the random winding prevention device according to the present embodiment are arranged side by side in parallel with each other (in the width direction of the vehicle body). In the state of being arranged side by side), it is attached and supported between the support side plates 10a and 10a.
[0016]
Details of the main winding winch 20 and the auxiliary winding winch 22 are shown in FIGS. As shown in the figure, the main winding winch 20 has a winding drum (drum) 20 a for winding the wire 30. Flange portions 20b and 20b are provided on both sides of the drum 20a. The wire 30 drawn out from the main winding winch 20 is between a sheave attached to, for example, a boom head 13 (see FIG. 4) of the boom 8 and a sheave of a hook block (not shown) having a lifting hook. The hoisting hook is suspended from the tip of the boom 8 so as to be raised and lowered. The auxiliary winding winch 22 has a winding drum (drum) 22 a for winding the wire 31. Flange portions 22b and 22b are provided on both sides of the drum 22a. The wire 31 drawn out from the auxiliary winding winch 22 is hung on the auxiliary sheave of the sheave bracket 14 (see FIG. 4) projecting from the boom head 13 and is suspended from the tip of the boom 8 so that the single lifting speed is high. Used for cable crane work.
[0017]
The drum 20 a of the main winding winch 20 is rotationally driven by the power from the hydraulic motor 40 being transmitted through the gear 41. In this case, the hydraulic motor 40 is attached to the side of the drum 20 a and is connected to the rotating shaft of the drum 20 a via the gear 41. In addition, the main winding winch 20 is prevented from being distorted by the turbulence preventing device described later. Since the auxiliary winding winch 22 is rotated and prevented from being disturbed by the same means as the main winding winch 20, the main winding winch 20 will be mainly described below. The auxiliary winding winch 22 has the same reference numerals in the drawings. In addition, most of the description will be omitted. Moreover, in FIGS. 1-3, the rotational drive means and the random winding prevention apparatus in the auxiliary winding winch 22 side are abbreviate | omitted for simplicity.
[0018]
As shown in FIGS. 1 to 3, the turbulent winding prevention device for preventing the turbulent winding by the main winding winch 20 (auxiliary winding winch 22) is one side of the drum 20 a (22 a) of the main winding winch 20 (auxiliary winding winch 22). A pair of springs 45, 46, a turbulent roll prevention roller 47 disposed opposite to the drum 20 a (22 a), and the spring force (biasing force) of the springs 45, 46 are transmitted to the turbulent roll prevention roller 47. And urging force transmission means.
[0019]
On the side of the drum 20a (outside of the flange portion 20b), specifically, in the housing located in the vicinity of the hydraulic motor 40, a part of the mounting bolt 49 for the gear 41 is used to fix the plate. 50 is attached. A bracket 51 protrudes from the upper end of the fixing plate 50, and one end of each of the springs 45 and 46 is attached to the bracket 51. That is, the springs 45 and 46 are provided at a position separated by a predetermined distance from the outer surface of the flange portion 20b located on the side opposite to the side adjacent to the auxiliary winding winch 22, and are spaces between the support side plates 10a and 10a in which various devices are incorporated. (It is located so as not to interfere with various devices and members arranged in the space between the support side plates 10a, 10a).
[0020]
The same configuration as that on the main winding winch 20 side is provided on the outer side of the flange portion 22b located on one side of the auxiliary winding winch 22, that is, on the side opposite to the side adjacent to the main winding winch 20.
[0021]
The urging force transmitting means for transmitting the spring force of the springs 45 and 46 to the random winding prevention roller 47 coaxially penetrates the outer shaft 56 having a rotatable short tubular shape extending along the width direction of the drum 20a. And a rotatable and long inner shaft 57 extending along the width direction of the drum 20a. In this case, one end of the inner shaft 57 is rotatably supported by the fixing plate 50. The other end of the inner shaft 57 is rotatably supported by a support portion of the insertion plate 15 extending from the support side plate 10a and positioned between the flange portions 20b and 22b of the winch drums 20a and 22a.
[0022]
A first spring mounting bracket 54 is integrally fixed to one end side of the outer shaft 56, and the other end of the spring 45 attached to the bracket 51 is fixed to the bracket 54. A second spring mounting bracket 53 is integrally fixed to one end side of the inner shaft 57, and the other end of the spring 46 attached to the bracket 51 is fixed to the bracket 53.
[0023]
A first connection plate 58 is integrally fixed to the other end side of the outer shaft 56, and a second connection plate 59 is integrally fixed to the other end side of the inner shaft 57. And between the 1st connection plate 58 and the 2nd connection plate 59, the disorder | damage | failure winding prevention roller 47 extended to the full width of the drum 20a is rotatably spanned. That is, the turbulent winding prevention roller 47 is disposed so as to face the drum 20a in a state in which both ends thereof are rotatably supported by the respective plates 58 and 59.
[0024]
A tension rod 60 is installed between the plates 58 and 59 to prevent the turbulent winding prevention roller 47 from coming off the plates 58 and 59. The bracket 51 that holds one end of the springs 45 and 46 is provided with adjustment screws 52 and 52 for adjusting the spring force of the springs 45 and 46.
[0025]
In the random winding prevention device having such a configuration, the spring force of the springs 45 and 46 is converted into a rotational force that rotates the shafts 56 and 57 and acts on both ends of the roller 47, and the roller 47 is urged toward the drum 20a. The The roller 47 is always pressed against the wire 30 wound around the drum 20a by this urging force. Therefore, the winding of the wire 30 by the winch 20 is prevented, and the wire 30 can be evenly wound around the drum 20a.
[0026]
As described above, in the turbulent winding prevention device of this embodiment, the two springs 45 and 46 that apply the urging force to both ends of the turbulent winding prevention roller 47 are collectively provided on one side of the winch drum 20a (22a). Therefore, when the main winding winch 20 and the auxiliary winding winch 22 are arranged side by side in the lateral direction, the springs 45 and 46 are not interposed between the main winding winch 20 and the auxiliary winding winch 22. That's it. Therefore, not only can the width of the entire winch device including the main winding winch 20 and the auxiliary winding winch 22 be reduced in size, but also the arrangement space of the springs conventionally provided between the winches (see FIG. 5). Therefore, the width dimension of each winch 20, 22 (drum 20a, 22a) can be set large, and a large amount of wire can be secured.
[0027]
Further, by providing the two springs 45 and 46 collectively on one side of the winch drum 20a (22a), the winches 20 and 22 are brought as close as possible to each other and arranged in parallel at the center portion between the support side plates 10a and 10a. Therefore, the wire can be wound at the center portion between the support side plates 10a and 10a (the fleet angle can be reduced). Therefore, more uniform winding of the wire can be performed. Further, when the width dimensions of the winches 20 and 22 (drums 20a and 22a) are set large, the width of the drums 20a and 22a is not increased outward in the width direction of the vehicle body, but at the center between the support side plates 10a and 10a. Since the drum width can be increased, a large amount of wire can be wound with a small fleet angle.
[0028]
Further, in the random winding prevention device of the present embodiment, the springs 45 and 46 are located on one side of the winches 20 and 22 and outside the space between the support side plates 10a and 10a in which various devices are incorporated (support). It is positioned so as not to interfere with various devices and members arranged in the space between the side plates 10a, 10a). Therefore, it is not necessary to secure an installation space for the springs 45 and 46 between the support side plates 10a and 10a, and the two winches 20 and 22 are connected to the support side plates 10a and 10a without limiting the degree of freedom in designing other members and devices. It can be arranged in parallel near the center of 10a as much as possible.
[0029]
Further, in the irregular winding prevention device of the present embodiment, the spring force of the springs 45 and 46 is transmitted to both ends of the roller 47 by the two shafts 56 and 57 arranged coaxially, so that the roller has a simple and space-saving configuration. 47 can be urged toward the drums 20a and 20b.
[0030]
【The invention's effect】
As described above, the anti-rolling device of the present invention is attached so that two winches can be arranged in parallel as close to the center of the support frame as possible without limiting the degree of freedom in designing other members and devices. Thus, it is possible to prevent random winding by the winch.
[Brief description of the drawings]
FIG. 1 is a perspective view of a main winding winch and an auxiliary winding winch provided with a random winding preventing device according to an embodiment of the present invention.
FIG. 2 is a front view schematically showing a main winding winch provided with a turbulent winding prevention device.
FIG. 3 is a side view when the main winding winch is viewed from the direction A in FIG. 2;
FIG. 4 is a side view of a self-propelled crane provided with a main winding winch and an auxiliary winding winch having a random winding prevention device according to an embodiment of the present invention.
FIG. 5 is a diagram schematically showing a conventional main winding winch and auxiliary winding winch provided with a random winding prevention device.
[Explanation of symbols]
20, 22 ... winches 20a, 22a ... drums 45, 46 ... springs 47 ... anti-rolling rollers 56, 57 ... shafts (biasing force transmitting means)

Claims (1)

Two winch drums having a rotation axis and juxtaposed adjacent to each other in the axial direction of the rotation axis;
Two springs arranged on one side in the rotational axis direction of the region where the two winch drums are arranged;
Two anti-rolling rollers disposed respectively facing the winding drums of the two winch drums;
An outer shaft and an inner shaft inserted through the outer shaft, the outer shaft is connected to one end of the anti-turbulence prevention roller, and the inner shaft is connected to the other end of the anti-turbulence prevention roller, The turbulent winding prevention roller is supported in a swingable state that can move toward and away from the winding drum of the winch drum, the spring force of the one spring is transmitted to the outer shaft, and the other By transmitting the spring force of the spring to the inner shaft, a spring force is applied to both ends of the turbulent winding prevention roller, and the turbulent winding prevention roller is urged toward the winding drum side of the winch drum. Biasing force transmission means;
An apparatus for preventing random winding for a winch for a crane, comprising:

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