JP2019038667A - Work machine - Google Patents

Abstract

To provide a work machine including a winch for multiple works capable of performing a load lifting work and other works with less change in rope arrangement as compared with the conventional one.SOLUTION: A work machine 100 includes a derricking boom 5 and an upper revolving body 1 mounted with a third winch 9 capable of performing the load lifting work. A front surface of the boom 5 is mounted with a rotatable boom front-surface sheave 19 wound with a third rope 9a that is wound on/delivered from the third winch 9. The third rope 9a is wired on the front surface side of the boom 5 through a head part of the boom 5 from a rear surface side of the boom 5.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a work machine including a boom that can be raised and lowered and a swivel body on which a winch capable of carrying a suspended load is mounted.

  As this type of technology, for example, there are those described in Patent Documents 1 and 2. The invention described in Patent Document 1 relates to a telescopic boom type work machine. This telescopic boom type work machine has a base end portion of the telescopic boom disposed behind the pivot center of the upper swing body, and is wound by a main winding winch disposed rearward from the pivot center of the upper swing body and is wound back. The rope and the auxiliary winding rope wound up by the auxiliary winding winch are guided to the boom head side on the rear side of the telescopic boom, and wound and wound by the third winch arranged in front of the turning center of the upper rotating body. It is set as the structure which guides the 3rd rope returned to the boom head side by the belly surface side of an expansion-contraction boom. In addition, as disclosed in FIG. 4 and the like of Patent Document 1, this telescopic boom type work machine changes the arrangement of the third rope so that, in addition to the suspended load work, the basic civil engineering equipment ( For example, a concrete hopper can be pulled in by a third winch.

  Patent Document 2 describes a lattice boom type mobile crane. This mobile crane is equipped with a base machine with a main winding winch, auxiliary winding winch, and boom hoisting winch, with the base end of the lattice boom positioned in front of the upper turning center's turning center. In addition, a tagline winch is mounted. The hydraulic circuit for operating the tag line winch is configured to be able to switch between a suspended load operation and a tag line operation, and the hydraulic circuit can be used for both full-scale suspended load operation and tag line operation. It is possible.

JP 2004-99251 A JP 2001-354386 A

  Here, in the telescopic boom type working machine described in Patent Document 1 and the lattice boom type mobile crane described in Cited Document 2, the rope of the winch mounted on the front part of the upper swing body is suspended and retracted. In any of (or tagline work), routing is performed only on the ventral side of the boom. Therefore, for example, when changing the rope arrangement from the rope arrangement of the suspended load work to the rope arrangement of the pull-in work (or tag line work), the bending condition of the rope arrangement route should not be tightened. Therefore, it is necessary to remove the rope from the sheave of the boom head and route the rope from the boom lower end side toward the foundation civil engineering equipment. On the other hand, when changing the rope arrangement from the rope arrangement for the pull-in operation (or tag line operation) to the rope arrangement for the suspended load operation, it is necessary to hang the rope again on the sheave of the boom head.

  In addition, because of the structure of the mobile crane, the space in front of the upper swing body may be narrow, and it is difficult to mount a large winch in front of the upper swing body, particularly in a lattice boom type mobile crane. Therefore, it is preferable to attach to the rear of the upper swing body in order to carry out a full load work. However, a main-winding winch, a supplementary-winding winch, and a undulation winch are already attached to the rear of the upper swing body, and in addition to this, it is difficult to mount a third winch capable of carrying a suspended load. Even if it is installed, care must be taken in routing the rope.

  Thus, in the cranes described in Patent Documents 1 and 2, whenever the work content of the winch mounted on the front part of the upper swing body is changed, a rope is hung on the sheave of the boom head, or from the boom head sheave. The rope must be removed and workability is not good. In particular, in the case of a large crane, workability is significantly deteriorated. In addition, it is difficult to mount a winch capable of performing a full load work on an upper swing body in addition to a winch such as a main winding winch or a supplemental winding winch.

  The present invention has been made in view of the above circumstances, and the purpose thereof is an operation provided with a multi-function winch that can perform a suspended load operation and other operations by changing the rope arrangement less than the conventional one. Is to provide a machine.

  A work machine according to the present invention includes a swingable body on which a boom that can be raised and lowered and a winch that can carry a suspended load are mounted. In this work machine, a rotatable boom belly surface rope guide on which a rope wound and unwound by the winch is hung is attached to the belly surface of the boom, and from the back side of the boom via the head part of the boom The rope is routed to the belly side of the boom.

According to the present invention, the rope of the winch that can be loaded from the rear side of the boom to the abdominal surface side of the boom via the head portion of the boom is routed, and the boom abdominal surface of the winch on the abdominal surface of the boom With the rope guides attached, the ropes can be routed from the ropes for lifting work to the ropes for work other than lifting work, such as retracting, without removing the rope from the boom head. The cable can be easily changed.
That is, according to the present invention, it is possible to perform a suspended load operation and other operations with a single winch with fewer changes in the rope arrangement than before.

It is a side view of the working machine which concerns on one Embodiment of this invention (The state which performs a suspended load operation | work with a third winch is shown). It is a figure when the A section in FIG. 1 is seen from back. It is a side view of the working machine which concerns on one Embodiment of this invention (The state which performs the horizontal direction support operation | work of a basic civil engineering apparatus with a third winch is shown).

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The working machine 100 of the present embodiment shown in FIGS. 1 to 3 is a lattice boom type mobile crane. The present invention can be applied to a telescopic boom type mobile crane, and can also be applied to a work machine that cannot move by itself, such as a crane mounted on a carriage.

  As shown in FIGS. 1 to 3, the work machine 100 includes a lower traveling body 2 and an upper swing body 1 (swivel body) mounted on the lower traveling body 2. A cab 3 (operator's cab) is disposed at the front portion of the upper swing body 1 and an up and down boom 5 (lattice boom) used for hanging a load is attached. The base end portion of the boom 5 is disposed in front of the turning center of the upper swing body 1. A gantry 10 as a boom support member that supports the boom 5 from the back side thereof is mounted on the rear side of the boom 5 of the upper swing body 1. The gantry 10 includes a compression member 10a (compression member) and a tension member 10b (tensile member). Further, a counterweight 4 is mounted at the rear part of the upper swing body 1 to balance the suspension load and ensure the stability of the posture of the work machine 100. The boom 5 is formed by connecting an upper boom 5a, an intermediate boom 5b, and a lower boom 5c. A mast (not shown) may be used instead of the gantry 10 as a boom support member that supports the boom 5 from the back side thereof.

  At least one winch, usually a plurality of winches, is mounted on the upper swing body 1. In the present embodiment, a plurality of winches 6 to 9 are mounted on the upper swing body 1, and the plurality of winches 6 to 9 are a main winding winch 6 and a supplementary winding rope 7a that take up and feed out the main winding rope 6a. The auxiliary winding winch 7 for winding and unwinding, the hoisting winch 8 for winding and unwinding the hoisting rope 8a for hoisting the boom 5, and the third winch 9 (3rd winch) capable of lifting and unloading the third rope 9a. Has been.

  The mounting location of the plurality of winches 6 to 9 in the upper swing body 1 is not particularly limited. However, in the case of a lattice boom type mobile crane as in the present embodiment, the plurality of winches 6 to 9 are all mounted on the boom 5. It is preferably mounted (arranged) behind the base end. In the case of a telescopic boom type mobile crane as described in Patent Document 1, for example, a third winch 9 (a winch capable of carrying a suspended load) out of the winches 6 to 9 is disposed more than the base end portion of the boom 5. Although it can be mounted on the front side, in the case of a lattice boom type mobile crane, the space on the front side is smaller than the base end portion of the boom 5, so that the winch has a size (capacity) capable of carrying a suspended load. Is difficult to mount in front of the base end of the boom 5 in terms of space.

  Further, the arrangement (order) of the plurality of winches 6 to 9 is not particularly limited, but in the present embodiment, the main winding winch 6 and the auxiliary winding winch 7 from the front side to the rear side of the upper swing body 1. , Undulating winch 8, and third winch 9. In a working machine such as a crane, the main winding winch 6, the auxiliary winding winch 7, and the undulating winch 8 are often mounted as standard. However, the third winch 9 may not be installed, and there are some work machines that do not have the setting (installation) of the third winch 9. Therefore, by arranging the plurality of winches 6 to 9 in the order of the main winding winch 6, the auxiliary winding winch 7, the undulating winch 8, and the third winch 9, from the front side to the rear side of the upper swing body 1, The third winch 9 can be mounted on a work machine that does not have the standard setting (mounting) of the third winch 9.

  The routing of the ropes 6a to 9a of the winches 6 to 9 will be described.

  The main winding rope 6 a wound around the main winding winch 6 and the auxiliary winding rope 7 a wound around the auxiliary winding winch 7 both have the boom 5 via the head portion of the boom 5 from the back side of the boom 5. It is routed to the ventral side. In addition, in FIG. 1, illustration of the rope wiring in the boom 5 abdominal surface side of the main winding rope 6a and the auxiliary winding rope 7a is abbreviate | omitted. FIG. 3 shows an example in which the main winding rope 6a is hung on the hook 18 on the belly surface side of the boom 5.

  The hoisting rope 8 a wound around the hoisting winch 8 is wound around a rotatable hoisting rope sheave 11, a lower spreader 14, and an upper spreader 13 that are attached to the tip of a compression member 10 a constituting the gantry 10. . The upper spreader 13 and the head portion of the boom 5 are connected by a fixed-length guy line 15, and when the hoisting rope 8 a is extended from the hoisting winch 8, the distance between the lower spreader 14 and the upper spreader 13 is increased. As a result, the boom 5 is lowered. On the contrary, when the hoisting rope 8a is wound up by the hoisting winch 8, the distance between the lower spreader 14 and the upper spreader 13 is narrowed, and the boom 5 is raised. In the case of a mast instead of the gantry 10, the upper and lower spreaders are arranged between the mast and the upper swing body 1, and the mast is raised or lowered by widening or narrowing the gap. The boom 5 is raised and lowered via a guy line (guy link) connecting the two.

  Next, the routing of the third rope 9a wound around the third winch 9 will be described. The arrangement of the third rope 9a can be changed to a rope arrangement for a suspended load operation and a rope arrangement for an operation other than a suspended load operation such as a lateral support operation for a basic civil engineering equipment.

  FIG. 1 shows the routing of the third rope 9 a when carrying out the lifting work with the third winch 9. A rotatable third rope gantry sheave 12 (boom support member distal end rope guide) is attached to the distal end of the compression member 10a constituting the gantry 10. In addition, a sheave 16 is attached to the back surface of the head portion (tip portion) of the boom 5 and a sheave 17 is rotatably attached to the abdominal surface. The third rope 9a is routed from the rear surface side of the boom 5 to the abdominal surface side of the boom 5 via the third rope gantry sheave 12 and the sheaves 16 and 17 (the head portion of the boom 5), and is hooked on the hook 18. .

  Note that FIG. 2 is a view of the portion A in FIG. 1 when viewed from the rear. The third rope gantry sheave 12 is, for example, disposed between two undulating rope sheaves 11.

  FIG. 3 shows the routing of the third rope 9a when work other than the suspended load work such as the lateral support work of the basic civil engineering equipment is performed by the third winch 9. A rotatable boom belly surface sheave 19 (boom belly surface rope guide) is attached to the lower part of the belly surface of the intermediate boom 5b. Further, boom belly surface guide rollers 20 and 21 are attached to the belly surface of the boom 5 above the boom belly surface sheave 19 with a predetermined interval. The third rope 9a is hung on the boom abdominal surface guide rollers 20 and 21 and the boom abdominal surface sheave 19 while being hung on the sheaves 16 and 17 of the head portion of the boom 5, and then, for example, on a basic civil engineering device 30 such as a vibro. It is attached.

  In addition, the boom belly surface sheave 19 is for changing the routing route of the third rope 9a and is essential. On the other hand, the boom belly surface guide rollers 20 and 21 are for avoiding interference between the third rope 9a and the boom 5, and in this embodiment, an intermediate portion of the boom 5 (intermediate boom 5b) is used as a boom. Since it is wide in the front-rear direction, boom abdominal surface guide rollers 20 and 21 are attached to the essential points of the abdominal surface of the boom 5. That is, the number of boom belly surface guide rollers 20 and 21 can be reduced or eliminated depending on the shape of the boom 5 or the like.

  When changing the routing of the third rope 9a from the rope routing of the suspended load work (FIG. 1) to the rope route of the work other than the suspended load operation (FIG. 3), the operator Without removing the third rope 9a from the sheaves 16, 17, the routing of the third rope 9a can be changed. That is, the operator can easily change the rope arrangement from the rope arrangement for the suspended load work to the rope arrangement for the work other than the suspended load work. The same applies to the case where the rope routing is changed from the rope routing for the work other than the suspended load operation to the rope routing for the suspended load operation. Before the change, the sheaves 16 and 17 of the head part of the boom 5 are provided with the third Since the rope 9a is already hung, the operator does not need to rehang the third rope 9a on the sheaves 16 and 17 of the head portion of the boom 5. That is, the operator can easily change the rope arrangement from the rope arrangement for the work other than the hanging work to the rope arrangement for the hanging work. As a result, the operator can perform the suspended load operation and other operations in one winch (third winch 9) with fewer changes in the rope arrangement than before.

  Here, in the present embodiment, the third winch 9 is disposed behind the base end portion of the boom 5 in the upper swing body 1. The third rope 9a wound and fed by the third winch 9 is routed from the back side of the boom 5 to the abdominal surface side of the boom 5 via the head portion of the boom 5, so that the base end portion of the boom 5 is temporarily assumed. If the third winch 9 is arranged in front of the boom, it is necessary to pass the third rope 9a through the boom 5 (in the case of a lattice boom), and in the case of a box-type boom such as a telescopic boom, the boom is avoided. It will be necessary to route the rope as you do. That is, the third winch 9 is arranged behind the base end portion of the boom 5 as in the present embodiment, so that the above problem is eliminated and the rope routing is easy.

  In the present embodiment, the third rope gantry sheave 12 is attached to the tip of the gantry 10 (boom support member), and the third rope 9 a is hung on the sheave 12. According to this configuration, it is easy to avoid interference on the back side of the boom 5 with a rope other than the third rope 9a and the third rope 9a. When interference with other ropes can be easily avoided, the third rope gantry sheave 12 may be omitted.

  Further, since the third winch 9 is a winch capable of carrying a suspended load, it cannot be performed by a tag line operation (tag line winch), for example, an operation of pulling the basic civil engineering equipment 30 to the boom 5 side, The operator can do it. That is, since the third winch 9 is a winch capable of carrying a suspended load, the worker can support the foundation civil engineering equipment 30 as desired.

  Although the embodiments of the present invention have been described above, it goes without saying that various modifications can be made within the scope that can be assumed by those skilled in the art.

1: Upper swing body (revolving body)
2: Lower traveling body 5: Boom 6: Main winding winch 6a: Main winding rope 7: Supplementary winding winch 7a: Supplementary winding rope 8: Relief winch 8a: Relief rope 9: Third winch (winch)
9a: Third rope (rope)
10: Gantry (boom support member)
12: Third rope gantry sheave (boom support member tip rope guide)
19: Boom belly sheave (boom belly rope guide)
100: Work machine

Claims (4)

In a work machine including a swingable body equipped with a boom that can be raised and lowered and a winch capable of carrying a suspended load,
A rotatable boom belly surface rope guide on which a rope wound and unwound by the winch is hung is attached to the belly surface of the boom,
The work machine, wherein the rope is routed from the back side of the boom to the ventral side of the boom via the head part of the boom. The work machine according to claim 1,
The work machine, wherein the winch is disposed rearward of a base end portion of the boom. The work machine according to claim 1 or 2,
In addition to the winch, the revolving body includes a main winding winch that winds and unwinds the main winding rope, an auxiliary winding winch that winds and unwinds the auxiliary winding rope, and a hoisting winch that winds and unwinds the hoisting rope for raising and lowering the boom. Is installed,
A work machine, wherein the main winding winch, the auxiliary winding winch, the undulating winch, and the winch are arranged from the front side to the rear side of the revolving structure. In the work machine in any one of Claims 1-3,
A boom support member that supports the boom from the back side is mounted on the swivel body behind the boom,
At the tip of the boom support member, a rotatable boom support member tip rope guide on which the rope wound and unwound by the winch is hung is attached,
A work machine in which the rope is routed from the back side of the boom to the abdomen side of the boom via the boom support member tip rope guide and the head portion of the boom.

Images