JP6721002B2 - Scaffold structure and work machine equipped with the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a scaffold structure arranged in a swing frame of an upper swing body of a work machine and a work machine including the scaffold structure.

As disclosed in Patent Document 1, in some working machines in which an upper revolving structure is rotatably provided on an upper part of a lower traveling structure, self-detachment for attaching/detaching a count weight to/from a revolving frame of the upper revolving structure. Some devices are located in a swivel frame.

JP, 2017-160014, A

By the way, the self-attaching/detaching device is not an essential component for a predetermined work performed by the work machine. Therefore, depending on the specifications, even if there is a space for mounting the self-attaching/detaching device, the self-attaching/detaching device may not be installed.

The self-attaching/detaching device is a device for lifting a counterweight of several tens to several hundreds of tons to a revolving frame, and is a large device as such. Therefore, when the self-attaching/detaching device is not mounted, a large space is vacated inside the revolving frame.

In addition to the self-attaching/detaching device, there is a device such as a third winch which is not essential for a predetermined work performed by the work machine. The same applies to these.

Here, some devices and the like arranged in the swivel frame and in the vicinity thereof require maintenance, and the worker moves on the devices and the like arranged in the swivel frame. However, if there is a space for mounting the self-attaching/detaching device or the like, it is dangerous for the worker.

Therefore, it is conceivable to block these spaces. However, simply blocking it will increase the weight and make it difficult to maintain the equipment and the like arranged in the turning frame from above and inside the turning frame.

An object of the present invention is to provide a scaffold structure capable of improving safety and maintainability, and a work machine including the scaffold structure.

In the scaffolding structure of the present invention, an upper revolving structure is rotatably provided on an upper part of a lower traveling structure, and in a work machine for performing a predetermined work, self-detachment for attaching/detaching a count weight to/from a revolving frame of the upper revolving structure. instead of the apparatus, prior to a scaffolding structure disposed Ki旋 times the frame has a scaffolding plate composed of a plurality of plates, a support member for supporting the scaffolding board from below, the said The support member is detachably attached to a bracket used when attaching the self-attaching/detaching device to the swivel frame, at least a part of the plurality of plates is openable/detachable, and the rest is the above-mentioned. It is characterized in that it is detachably attached to the support member. Further, in the scaffolding structure of the present invention, an upper revolving structure is rotatably provided on an upper part of a lower traveling structure, and in a working machine for performing a predetermined work, instead of a third winch for winding and unwinding a wire rope. A scaffolding structure disposed in a swivel frame of the upper revolving structure, the scaffolding plate including a plurality of plates, and a support member supporting the scaffolding plate from below, the support member Is detachably attached to a bracket used when attaching the third winch to the swivel frame, at least a part of the plurality of plates is openable/detachable, and the rest is attached to the support member. It is characterized by being detachably attached.

Further, the work machine of the present invention is a work machine in which an upper revolving structure is rotatably provided on an upper part of a lower traveling body, and a self-attaching/detaching device for attaching/detaching a count weight to/from a revolving frame of the upper revolving structure. Instead, it has a scaffolding structure arranged in the swivel frame, the scaffolding structure has a scaffolding plate composed of a plurality of plates, and a support member for supporting the scaffolding plate from below. The support member is detachably attached to a bracket used when attaching the self-attaching/detaching device to the swivel frame, and at least a part of the plurality of plates is openable/detachable, and the rest. Is detachably attached to the support member.

According to the invention, a scaffolding structure is placed in the swivel frame of the superstructure, instead of equipment that is not essential for a given operation. Therefore, when the worker moves on the equipment arranged in the swivel frame for maintenance, the risk of the worker falling into the swivel frame is reduced. In addition, it is easy to perform maintenance from the upper side of the swing frame. Further, at least a part of the plurality of plates constituting the scaffolding plate of the scaffolding structure is openable/detachable. Therefore, an operator can enter the swivel frame by opening or removing at least a part of the plurality of plates, so that maintenance can be easily performed from the inside of the swivel frame. Thereby, safety and maintainability can be improved.

It is a side view of a crane. It is the perspective view which looked at the rear part of a revolving frame from the slanting back. It is the perspective view which looked at the rear of a revolving frame from the slanting back, and is a figure which does not show a revolving frame. It is the figure which looked at the rear part of a revolving frame from the lower part. It is the perspective view which looked at the back of a revolving frame from the back, and is a figure which does not show a revolving frame.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

(Structure of crane)
The scaffold structure according to the present embodiment is provided on a crane that is a work machine. As shown in FIG. 1, which is a side view of the crane 10, the crane 10 is for hoisting and unwinding a suspended load (not shown), and an upper turning is provided above a crawler-type lower traveling body 11. The body 12 is configured to be rotatable. Hereinafter, the right side of FIG. 1 will be described as the front side and the left side of FIG. 1 will be described as the rear side. The work machine is not limited to the crawler type crane, and may be a wheel type crane, a crawler type or wheel type hydraulic excavator, or the like.

The upper swing body 12 includes a swing frame 13, a boom 14, a mast 15, a winch 16, a lower spreader 17, a counterweight 18, and a backstop device 19.

The revolving frame 13 is attached to the lower traveling body 11 via a revolving bearing (not shown). The boom 14 is connected to the front part of the swivel frame 13 so as to be capable of undulating with respect to the swivel frame 13. The mast 15 is connected to the swivel frame 13 on the rear side of the boom 14 so that the mast 15 can rise and fall. The tip portion of the mast 15 and the tip portion of the boom 14 are connected via a guy link 20.

The winch 16 is arranged in the center of the revolving frame 13. The winch 16 winds and unwinds the wire rope, and is used for hoisting and unwinding a suspended load, and for hoisting the boom 14. In this embodiment, three winches 16 are provided. The three winches 16 are arranged from the front side to the rear side of the revolving frame 13 in the order of a main winch 16a, a supplementary winch 16b, and a third winch 16c.

The lower spreader 17 is provided at the rear part of the revolving frame 13. The upper spreader 21 provided at the tip of the mast 15 and the lower spreader 17 are connected via a boom hoisting rope 22. By winding and unwinding the boom hoisting rope 22 with the winch 16, as a result of hoisting the mast 15, the boom 14 is hoisted.

The counterweight 18 is mounted on the rear part of the revolving frame 13. The backstop device 19 is attached to the back surface of the boom 14 and extends from the back surface of the boom 14 toward the swing frame 13. The back stop device 19 is received by the back stop receiver 23 fixed to the swing frame 13 to restrict the rotation of the boom 14 to the rear side.

The boom 14, the mast 15, the winch 16 (excluding the third winch 16c), the lower spreader 17, the counterweight 18, and the backstop device 19 are indispensable components for hoisting and unwinding suspended loads.

On the other hand, there are a self-attaching/detaching device, a third winch 16c, and the like as components that are not essential for hoisting and unwinding suspended loads.

The self-attaching/detaching device attaches/detaches the counterweight 18 to/from the revolving frame 13. The crane 10 of the present embodiment does not have a self-attaching/detaching device, but can also be equipped with a self-attaching/detaching device. Therefore, a space for mounting the self-attaching/detaching device is provided in the rear portion of the revolving frame 13.

Although there is a space for mounting the self-attaching/detaching device, when the self-attaching/detaching device is not mounted, a large space is vacant inside the revolving frame 13. If the space for the self-attachment/detachment device is empty, it is dangerous for an operator who works on the equipment or the like arranged in the swivel frame 13.

(Structure of scaffold structure)
The scaffold structure of the present embodiment is arranged in the revolving frame 13 of the upper revolving structure 12 instead of the self-attaching/detaching device, which is a device that is not essential for hoisting and unwinding suspended loads.

As shown in FIG. 2, which is a perspective view of the rear portion of the revolving frame 13 as seen obliquely from the rear, the scaffolding structure 1 has a scaffolding plate 2. In the present embodiment, the scaffolding plate 2 is composed of four plates 2a to 2d, but the number of plates is not limited to this. A large number of through holes for ventilation are formed in each of the four plates 2a to 2d. These through holes also serve to reduce the weight of the plate, drain water from the plate surface, and prevent workers from slipping. Note that each of the four plates 2a to 2d may have a surface on which an operator rests, which is subjected to a non-slip process such as unevenness.

In the present embodiment, the space for mounting the self-attaching/detaching device is adjacent to the space for mounting the revolving frame 13, the engine (not shown), and the space for mounting the hydraulic oil tank 24. The engine is covered with an engine cover 25. The engine cover 25 and the upper end of the hydraulic oil tank 24 are arranged at substantially the same height as the upper end of the revolving frame 13. The scaffold plate 2 is arranged at substantially the same height as the engine cover 25 and the upper end of the hydraulic oil tank 24. Therefore, a worker who moves on the equipment arranged in the swivel frame 13 can easily perform maintenance from the upper side of the swivel frame 13.

Further, the scaffolding plate 2 is arranged with almost no gap with respect to the revolving frame 13, the engine cover 25, and the hydraulic oil tank 24. Therefore, when the worker moves on the equipment arranged in the swivel frame 13 for maintenance, the risk of the worker falling into the swivel frame 13 is reduced.

Further, as shown in FIG. 3 which is a perspective view of the rear portion of the revolving frame 13 as seen obliquely from the rear, the scaffolding structure 1 has a support member 3. The support member 3 supports the scaffolding plate 2 from below. The swivel frame 13 is not shown in FIG.

The support member 3 has a plate member 3a and a pillar member 3b. The plate member 3a is detachably attached to the bracket 26 (see FIG. 4) with bolts. The bracket 26 is attached to the swivel frame 13 as shown in FIG. 4, which is a view of the rear portion of the swivel frame 13 seen from below. The bracket 26 is used when the self-attaching/detaching device is attached to the revolving frame 13. As shown in FIG. 3, a hole for reducing the weight is formed in the center of the plate member 3a.

The column member 3b is fixed to the four corners of the plate member 3a by welding and extends diagonally upward.

As shown in FIG. 5, which is a perspective view of the rear portion of the revolving frame 13 as viewed from the rear side, among the four plates 2a to 2d, the plate 2d adjacent to the engine cover 25 is connected to the adjacent plate 2c by a hinge. It is open and can be opened and closed. An end portion of the plate 2d adjacent to the engine cover 25 rides on the engine cover 25. The other plates 2a, 2b, 2c are detachably attached to the column member 3b with bolts. Therefore, the operator can enter the swivel frame 13 by opening the plate 2d, which facilitates maintenance from the inside of the swivel frame 13. The plate 2d may be removable. The turning frame 13 is not shown in FIG.

(effect)
As described above, according to the scaffold structure 1 and the crane 10 including the scaffold structure according to the present embodiment, the scaffold structure 1 is arranged in the swing frame 13 of the upper swing body 12 instead of the self-attaching/detaching device. To be done. Therefore, when the worker moves on the equipment arranged in the swivel frame 13 for maintenance, the risk of the worker falling into the swivel frame 13 is reduced. Further, it is easy to perform maintenance from the upper side of the revolving frame 13. Further, among the plurality of plates 2a to 2d that form the scaffolding plate 2 of the scaffolding structure 1, the plate 2d is openable and closable. Therefore, the operator can enter the swivel frame 13 by opening the plate 2d, which facilitates maintenance from the inside of the swivel frame 13. Thereby, safety and maintainability can be improved.

Although the embodiment of the present invention has been described above, it merely exemplifies a specific example and does not particularly limit the present invention, and a specific configuration and the like can be appropriately modified in design. Further, the actions and effects described in the embodiments of the invention only list the most suitable actions and effects resulting from the present invention, and the actions and effects according to the present invention are described in the embodiments of the present invention. It is not limited to what has been done.

For example, the scaffolding structure 1 is not limited to the configuration arranged in the turning frame 13 instead of the self-attaching/detaching device, and may be arranged in the turning frame 13 instead of the third winch 16c. In this case, the slewing bearing can be favorably maintained by opening or removing a part of the plurality of plates.

Also, in the case where an engine that meets the third emission regulation measures is installed instead of an engine that implements the fourth emission regulation measures, in order to block the disposition space of the urea SCR (selective catalytic reduction) unit that is no longer needed, The scaffold structure 1 of the embodiment may be used.

DESCRIPTION OF SYMBOLS 1 Scaffold structure 2 Scaffold plate 2a-2d Plate 3 Support member 3a Plate member 3b Column member 10 Crane 11 Lower traveling body 12 Upper revolving structure 13 Revolving frame 14 Boom 15 Mast 16 Winch 16a Main winding winch 16b Supplementary winch 16c Third winch 17 Lower spreader 18 Counterweight 19 Backstop device 20 Guylink 21 Upper spreader 22 Boom hoisting rope 23 Backstop receiver 24 Hydraulic oil tank 25 Engine cover 26 Bracket

Claims (3)

The upper rotating body is provided pivotably on the lower traveling body, a working machine for performing predetermined work, instead of the self desorber to desorb a count weight to the pivot frame of the upper rotating body, before Ki旋 A scaffolding structure that is placed in a rotating frame,
A scaffolding board composed of multiple boards,
A support member for supporting the scaffolding plate from below,
Have
The support member is detachably attached to a bracket used when attaching the self-attaching/detaching device to the swing frame.
A scaffold structure, wherein at least a part of the plurality of plates is openable/closable or detachable, and the rest is detachably attached to the support member. An upper revolving structure is rotatably provided on the upper part of the lower traveling structure, and in a working machine for performing a predetermined work, instead of a third winch for winding and unwinding the wire rope, the upper revolving structure is provided in the revolving frame of the upper revolving structure. A scaffolding structure to be placed,
A scaffolding board composed of multiple boards,
A support member for supporting the scaffolding plate from below,
Have
The support member is detachably attached to a bracket used when attaching the third winch to the swing frame,
A scaffold structure, wherein at least a part of the plurality of plates is openable/closable or detachable, and the rest is detachably attached to the support member. A work machine in which an upper revolving structure is rotatably provided above a lower traveling structure,
In place of the self-attaching/detaching device for attaching/detaching the count weight to/from the revolving frame of the upper revolving structure, a scaffold structure is disposed in the revolving frame,
The scaffold structure is
A scaffolding board composed of multiple boards,
A support member for supporting the scaffolding plate from below,
Have
The support member is detachably attached to a bracket used when attaching the self-attaching/detaching device to the swing frame.
A working machine, wherein at least a part of the plurality of plates is openable/closable or detachable, and the rest is detachably attached to the support member.

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