JP7188424B2 - scaffolding equipment - Google Patents

Description

The present invention relates to a scaffolding device for crawler-type working machines.

In Patent Document 1, a lower weight (car body weight) arranged between a pair of left and right crawlers of a crane, which is a working machine, consists of a lower weight and an upper weight mounted on the lower weight, and the upper weight is attached to the lower part. It is disclosed that the weight extends to the left and right. A worker can move between the pair of crawlers by getting on the upper weight from the crawlers.

Patent No. 4619147

However, in Patent Literature 1, the size of the car body weight is larger than that of the conventional car body weight, so workability is deteriorated when attaching and detaching the car body weight to and from the lower traveling body. In addition, there is a risk of being subject to various restrictions when transporting car body weights by trailer. Furthermore, it is difficult to secure storage space for car body weights.

SUMMARY OF THE INVENTION An object of the present invention is to provide a scaffolding device capable of suppressing an increase in the size of a car body weight and improving workability when attaching and detaching the car body weight to and from an undercarriage.

The present invention is a scaffolding device provided on a lower traveling body of a working machine and arranged between a pair of left and right crawlers, the scaffolding device being arranged above a car body weight of the lower traveling body and connecting the crawlers together. and a moving device for moving the movable scaffolding in the lateral direction, wherein the moving device includes a storage position where the movable scaffolding is accommodated on the car body weight; The movable scaffolding is moved between the usage position where the movable scaffolding projects toward the crawler from the storage position , and the pair of movable scaffoldings are arranged above the car body weight in the left-right direction. and the moving device moves the pair of movable scaffolds away from or close to each other .

According to the present invention, the movable scaffold is moved between the stored position where the movable scaffold is accommodated on the car body weight and the use position where the movable scaffold protrudes toward the crawler from the stored position. By positioning the movable scaffold at the use position, at least a part of the movable scaffold is arranged in the gap between the crawler and the car body weight, so that a worker can pass over the movable scaffold and move between the crawler and the car body weight. can be moved. On the other hand, by locating the movable scaffold at the retracted position, the movable scaffold is accommodated on the car body weight. As a result, the sizes of the car body weight and the scaffolding device can be reduced compared to a configuration in which the scaffold always protrudes to the side of the car body weight. Therefore, the car body weight and the scaffolding device can be easily attached to and detached from the undercarriage. Furthermore, when the movable scaffolding is positioned at the storage position, the car body weight and the scaffolding device are not subject to size restrictions when transporting them, respectively, and are easy to store. As a result, it is possible to suppress an increase in the size of the car body weight and improve workability when attaching and detaching the car body weight to and from the lower traveling body.

1 is a side view of a crane; FIG. It is the perspective view which looked at the undercarriage from the front. FIG. 4 is a perspective view of the scaffolding device viewed from above, showing a state in which the movable scaffold is positioned at the retracted position; FIG. 4 is a perspective view of the scaffolding device viewed from above, showing a state in which the movable scaffold is positioned at the use position; It is the top view which looked at the scaffolding apparatus from upper direction. It is the figure which looked at the left part of FIG. 4 from the A direction. It is a top view of the scaffolding device as seen from above, showing the configuration of the moving device. FIG. 7 is an enlarged view of a main portion B of FIG. 6;

Preferred embodiments of the present invention will be described below with reference to the drawings.

(Crane configuration)
The scaffolding device in this embodiment is provided in a crane, which is a working machine. As shown in FIG. 1, which is a side view of the crane 10, the crane 10 is for hoisting and lowering a suspended load (not shown). The body 12 is configured to be rotatable. Note that the working machine is not limited to a crane, and may be a hydraulic excavator or the like.

The upper swing structure 12 has 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 undercarriage 11 via a revolving bearing (not shown). The boom 14 is connected to the front portion of the revolving frame 13 so as to be able to rise and fall with respect to the revolving frame 13 .

The mast 15 is connected to the revolving frame 13 on the rear side of the boom 14 so as to be able to rise and fall. The tip of the mast 15 and the tip of the boom 14 are connected via a guy link 20 .

The winch 16 is arranged in the central portion of the revolving frame 13 . The winch 16 winds and feeds out the wire rope, and is used for hoisting and lowering the suspended load, raising and lowering the boom 14, and the like. 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 hoisting winch 16a, an auxiliary hoisting winch 16b, and a hoisting winch 16c.

The lower spreader 17 is provided on the rear portion of the swivel frame 13 . An upper spreader 21 provided at the tip of the mast 15 and a lower spreader 17 are connected via a boom hoisting rope 22 . Winding and unwinding of the boom luffing rope 22 with the winch 16 raises and lowers the mast 15 and consequently the boom 14 .

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

(Structure of scaffolding device)
As shown in FIG. 2 which is a perspective view of the lower traveling body 11 viewed from the front, the lower traveling body 11 has a car body 24 , a pair of left and right crawlers 25 , and car body weights 26 . The crawlers 25 are arranged on the left and right sides of the car body 24, respectively. The car body weights 26 are arranged between the pair of crawlers 25 at the front and rear ends of the car body 24 . The car body weight 26 is a weight for improving the stability against overturning of the crane 10 in the longitudinal direction. Hereinafter, the direction connecting the crawlers 25 is referred to as the left-right direction.

The scaffolding device 1 is provided on the lower traveling body 11 and arranged between a pair of left and right crawlers 25 . The scaffolding device 1 is detachably attached to the car body weight 26 . The scaffolding device 1 and the car body weight 26 are separately attached to and detached from the lower traveling body 11 . The scaffolding device 1 and the car body weight 26 may be integrated, and the car body weight 26 may be detachable from the lower traveling body 11 .

The scaffolding device 1 has a movable scaffolding 2 and a moving device 3 . A pair of movable scaffolds 2 are arranged in the left-right direction above car body weights 26 . Each of the pair of movable scaffolds 2 is movable in the left-right direction. The moving device 3 moves the movable scaffold 2 in the horizontal direction. Specifically, the moving device 3 moves the pair of movable scaffolds 2 so as to separate or approach each other. A notch 2 a is formed in the movable scaffold 2 so that a worker can easily reach stairs 25 a provided on the crawler 25 .

Here, the moving device 3 moves the movable scaffolding 2 between the storage position and the use position. As shown in FIG. 3A, which is a perspective view of the scaffolding device 1 from above, the retracted position is a position where the movable scaffolding 2 is accommodated on the car body weights 26 . The storage position in this embodiment is a position where the entire length of the movable scaffold 2 in the left-right direction can be accommodated on the car body weight 26 .

As shown in FIG. 3B, which is a perspective view of the scaffolding device 1 viewed from above, the use position is a position where the movable scaffolding 2 protrudes toward the crawler 25 from the retracted position. The use position of the present embodiment is a position where the entire length of the movable scaffold 2 in the horizontal direction protrudes from the car body weight 26 toward the crawler 25 . FIG. 2 illustrates a state in which each of the pair of movable scaffolds 2 is positioned at the use position. As shown in FIG. 3B, the movable scaffold 2 is formed with a hole 47 for avoiding interference with a member (trans lifter not shown) facing downward in the use position.

In this manner, the movable scaffolding 2 is moved between the storage position and the use position. By positioning the movable scaffolding 2 at the use position, the movable scaffolding 2 is arranged in the gap between the crawler 25 and the car body weight 26, so that the operator can pass over the movable scaffolding 2 to move the crawler 25 and the car body weight 26. can move between On the other hand, by positioning the movable scaffolding 2 at the retracted position, the movable scaffolding 2 is completely accommodated on the car body weight 26.例文帳に追加As a result, the sizes of the car body weight 26 and the scaffolding device 1 can be reduced compared to a configuration in which the scaffold always protrudes to the side of the car body weight 26 . Therefore, the car body weight 26 and the scaffolding device 1 can be easily attached to and detached from the undercarriage 11 . Furthermore, when the movable scaffolding 2 is positioned at the storage position, the car body weight 26 and the scaffolding device 1 are not subject to size restrictions when transporting them, respectively, and are easy to store. As a result, it is possible to suppress an increase in the size of the car body weight 26 and improve workability when attaching and detaching the car body weight 26 to and from the lower traveling body 11 .

Also, a pair of movable scaffolds 2 are moved apart or close to each other. By positioning the pair of movable scaffolds 2 at the use positions, respectively, the movable scaffolds 2 are arranged in the gaps between the crawlers 25 and the car body weights 26 on both sides of the car body weights 26 in the left-right direction. can move between the pair of crawlers 25 over the pair of movable scaffolds 2 . Further, by moving the pair of movable scaffolds 2 so as to be separated from each other or close to each other, the trouble of moving the pair of movable scaffolds 2 separately can be saved. Thereby, the workability of moving the movable scaffolding 2 can be improved.

As shown in FIG. 4, which is a top view of the scaffolding device 1 from above, and FIG. 5, which is a view of the left part of FIG. , intermediate rails 33 and scaffolding rails 34 . The base 31 is fixed on the car body weight 26 . Base rails 32, intermediate rails 33, and scaffold rails 34 are provided for the pair of movable scaffolds 2, respectively. A pair of base rails 32 , intermediate rails 33 , and scaffolding rails 34 are provided in front and rear (up and down in the drawing) of one movable scaffold 2 .

The base rail 32 is fixed to the base 31 . Intermediate rails 33 are arranged between base rails 32 and scaffolding rails 34 . The intermediate rail 33 is movable in the longitudinal direction of the base rail 32 with respect to the base rail 32 . A scaffold rail 34 is fixed to the movable scaffold 2 . The scaffolding rails 34 are movable in the longitudinal direction of the base rails 32 with respect to the intermediate rails 33 . That is, the scaffolding rail 34 can move in the longitudinal direction of the base rail 32 with respect to the base rail 32 .

The moving device 3 moves the scaffolding rails 34 with respect to the base rails 32 to slide the movable scaffolding 2 in the horizontal direction. Here, the base rail 32, the intermediate rail 33, and the scaffolding rail 34 are interlocked so that the intermediate rail 33 is always positioned between the base rail 32 and the scaffolding rail 34.例文帳に追加Therefore, the moving device 3 moves the scaffolding rail 34 with respect to the base rail 32 by moving the intermediate rail 33 with respect to the base rail 32 . As a result, the movable scaffolding 2 is slid in the left-right direction.

Here, each of the base rail 32, the intermediate rail 33, and the scaffolding rail 34 has a U-shaped cross section. Intermediate rails 33 are arranged inside the base rails 32 , and scaffolding rails 34 are arranged inside the intermediate rails 33 . Therefore, when the movable scaffolding 2 is positioned at the storage position, the intermediate rails 33 are stored inside the base rails 32 and the scaffolding rails 34 are stored inside the intermediate rails 33 . By adopting such a configuration, compared to arranging the base rail 32, the intermediate rail 33, and the scaffolding rail 34 in parallel, the arrangement space for the three rails can be reduced. Therefore, three rails can be preferably arranged in a limited space on the car body weight 26. - 特許庁

By moving the scaffolding rails 34 with respect to the base rails 32 in this manner, the movable scaffolding 2 is slid in the left-right direction. The base rail 32, the intermediate rail 33, and the scaffolding rail 34 are interlocked so that the intermediate rail 33 is always positioned between the base rail 32 and the scaffolding rail 34. - 特許庁By moving the intermediate rails 33 with respect to the base rails 32, the scaffolding rails 34 are moved with respect to the base rails 32, and the movable scaffolding 2 is slid in the left-right direction. By using the three-stage rails, the movable scaffolding 2 can be projected further toward the crawler 25 from the car body weight 26.例文帳に追加

Further, as shown in FIG. 4 , the scaffolding device 1 has a handle (operating means) 4 . The handle 4 drives the moving device 3 and is manually operated by the operator. The handle 4 is arranged on the base 31 at a position that does not interfere with the movable scaffolding 2 .

In this way, the handle 4 is arranged at a position that does not interfere with the movable scaffold 2.例文帳に追加Thereby, the handle 4 can be operated without disturbing the movement of the movable scaffold 2. - 特許庁

As shown in FIG. 6, which is a top view of the scaffolding device 1 from above, and FIG. 7, which is an enlarged view of the main part B of FIG. It has a chain 37 , a large sprocket 38 , a running chain 39 and a sprocket 40 .

A pair of fixed chains 35 are provided and each is fixed to the base 31 . The fixed chain 35 extends in the longitudinal direction of the base rail 32 from the center of the base 31 to the end of the base 31 .

End portions of the pair of upper and lower intermediate rails 33 on the center side of the base 31 are connected by a connecting beam 41 . The ends of the pair of upper and lower intermediate rails 33 on the end side of the base 31 are connected by connecting beams 42 . The small sprocket 36 is rotatably provided on each of the connecting beams 41 and 42 . A chain 37 is wound around the pair of small sprockets 36 .

As shown in FIG. 7, part of the chain 37 is fixed to the base 31 by a fixing member 43. As shown in FIG. A part of the chain 37 is fixed to the movable scaffold 2 by a fixing member 44 .

The large sprocket 38 is rotatably provided on the connecting beam 41 . This large sprocket 38 is engaged with the fixed chain 35 .

As shown in FIG. 6, the running chain 39 is wound around the handle 4 and the two large sprockets 38, respectively. Two sprockets 40 are provided at each end of the base 31 and three sprockets 40 are provided at the center of the base 31 . Traveling chains 39 are respectively wound around these sprockets 40 .

In such a configuration, when the handle 4 is rotated, the running chain 39 runs clockwise or counterclockwise in the figure. Then, the large sprocket 38 engaged with the traveling chain 39 rotates and moves along the fixed chain 35 to the center side or the end side of the base 31 . Thereby, the connecting beam 41 moves. That is, the intermediate rail 33 moves with respect to the base rail 32 .

When the connecting beam 41 moves, the chain 37 runs. A part of the chain 37 is fixed to the base 31 by a fixing member 43 and another part is fixed to the movable scaffold 2 by a fixing member 44 . Therefore, when the chain 37 runs, the movable scaffolding 2 moves toward the center side or the end side of the base 31 . The distance that the intermediate rail 33 moves relative to the base 31 (base rail 32) is the same as the distance that the movable scaffold 2 (scaffold rail 34) moves relative to the intermediate rail 33.

In addition, it is not limited to the structure for moving a plurality of rails by a chain mechanism using the running chain 39, the fixed chain 35, the chain 37, etc., and a mechanism using a rack and pinion, a mechanism using a belt, a link mechanism, etc. A plurality of rails may be moved by a power source such as a hydraulic or pneumatic cylinder or an electric motor.

Further, as shown in FIG. 4, the scaffolding device 1 has a lock structure 5. As shown in FIG. The lock structure 5 locks the movement of the movable scaffold 2 with respect to the car body weight 26 by locking the driving of the moving device 3 by the handle 4 . Specifically, the lock structure 5 physically locks the rotation of the handle 4 . The lock structure 5 may have, for example, a rod-shaped member inserted through the rotating shaft of the handle 4 and support members supporting both ends of the rod-shaped member.

If the driving of the moving device 3 is locked by the lock structure 5, the movable scaffolding 2 will not move without permission, so that the worker can move on the movable scaffolding 2 or travel under the scaffolding device 1 together with the car body weight 26. The work of attaching and detaching to and from the body 11 can be easily performed.

In addition, as shown in FIGS. 4 and 5, the movable scaffolding 2 has folding portions 45 and 46 . In this embodiment, the movable scaffolding 2 has a folding part 45 on the side of the base 31 in the left-right direction, and a folding part 46 on the side opposite to the base 31 in the left-right direction. The folding parts 45 and 46 can be folded so as to overlap each other in the vertical direction, and can be expanded in the left-right direction.

In this embodiment, when the movable scaffolding 2 is positioned at the use position, a gap is generated between the movable scaffolding 2 and the base 31 (car body weight 26). The folding part 45 can fill this gap. The folding part 46 increases the size of the movable scaffold 2 in the horizontal direction. The above-described hole 47 is formed at the boundary portion between the folding portion 46 and the main body of the movable scaffold 2 (see FIG. 3B).

In this way, by widening the folding parts 45 and 46 in the left-right direction, the size of the movable scaffold 2 in the left-right direction can be increased. In addition, when the movable scaffold 2 is positioned at the use position, the gap between the movable scaffold 2 and the car body weight 26 is filled with the folding part 45, so that the operator can easily move on the movable scaffold 2. can be made to move.

(effect)
As described above, according to the scaffolding device 1 of the present embodiment, there are a storage position where the movable scaffolding 2 is placed on the car body weight 26 and a use position where the movable scaffolding 2 protrudes toward the crawler 25 from the storage position. The mobile scaffold 2 is moved between. By positioning the movable scaffold 2 at the use position, at least a part of the movable scaffold 2 is arranged in the gap between the crawler 25 and the car body weight 26, so that the operator can pass over the movable scaffold 2 and move the crawler 25. It can move between car body weights 26 . On the other hand, by positioning the movable scaffolding 2 at the retracted position, the movable scaffolding 2 is accommodated on the car body weight 26 . As a result, the sizes of the car body weight 26 and the scaffolding device 1 can be reduced compared to a configuration in which the scaffold always protrudes to the side of the car body weight 26 . Therefore, the car body weight 26 and the scaffolding device 1 can be easily attached to and detached from the undercarriage 11 . Furthermore, when the movable scaffolding 2 is positioned at the storage position, the car body weight 26 and the scaffolding device 1 are not subject to size restrictions when transporting them, respectively, and are easy to store. As a result, it is possible to suppress an increase in the size of the car body weight 26 and improve workability when attaching and detaching the car body weight 26 to and from the lower traveling body 11 .

Also, a pair of movable scaffolds 2 are moved apart or close to each other. By positioning the pair of movable scaffolds 2 at the use positions, respectively, the movable scaffolds 2 are arranged in the gaps between the crawlers 25 and the car body weights 26 on both sides of the car body weights 26 in the left-right direction. can move between the pair of crawlers 25 over the pair of movable scaffolds 2 . Further, by moving the pair of movable scaffolds 2 so as to be separated from each other or close to each other, the trouble of moving the pair of movable scaffolds 2 separately can be saved. Thereby, the workability of moving the movable scaffolding 2 can be improved.

Further, by moving the scaffolding rails 34 with respect to the base rails 32, the movable scaffolding 2 is slid in the left-right direction. The base rail 32, the intermediate rail 33, and the scaffolding rail 34 are interlocked so that the intermediate rail 33 is always positioned between the base rail 32 and the scaffolding rail 34. - 特許庁By moving the intermediate rails 33 with respect to the base rails 32, the scaffolding rails 34 are moved with respect to the base rails 32, and the movable scaffolding 2 is slid in the left-right direction. By using the three-stage rails, the movable scaffolding 2 can be projected further toward the crawler 25 from the car body weight 26.例文帳に追加

Also, a handle 4 for driving the moving device 3 is arranged at a position where it does not interfere with the movable scaffolding 2 . Thereby, the handle 4 can be operated without disturbing the movement of the movable scaffold 2. - 特許庁

It also has a lock structure 5 that locks the movement of the movable scaffold 2 with respect to the car body weight 26 by locking the driving of the moving device 3 by the handle 4 . If the driving of the moving device 3 is locked, the movable scaffolding 2 will not move without permission. can be easily attached and detached.

The movable scaffolding 2 also has folding parts 45 and 46 . By widening the folding portions 45 and 46 in the left-right direction, the size of the movable scaffold 2 in the left-right direction can be increased. In addition, when the movable scaffolding 2 is positioned at the use position, if there is a gap between the movable scaffolding 2 and the car body weight 26, the folding part 45 can be used to fill the gap so that the operator can easily move the movable scaffolding. 2 can be easily moved.

Although the embodiments of the present invention have been described above, the specific examples are merely illustrated, and the present invention is not particularly limited. Further, the actions and effects described in the embodiments of the invention are merely enumerations of the most suitable actions and effects resulting from the present invention, and the actions and effects of the present invention are described in the embodiments of the invention. are not limited to those listed.

For example, the configuration is not limited to moving the movable scaffolding 2 in the horizontal direction, and the configuration may be such that the movable scaffolding 2 is rotated in the horizontal direction around a rotation axis extending in the vertical direction. For example, between a storage position where the entire length of the movable scaffolding 2 in the left-right direction is above the car body weight 26 and a use position where the entire length of the movable scaffolding 2 in the left-right direction projects from above the car body weight 26 toward the crawler 25. , rotate the mobile scaffold 2 . Even with such a configuration, by locating the movable scaffolding 2 in the retracted position, the sizes of the car body weights 26 and the scaffolding device 1 can be reduced compared to the configuration in which the scaffolds are always projected to the left and right of the car body weights 26. can be made smaller.

1 Scaffold Device 2 Movable Scaffold 3 Moving Device 4 Handle (Operating Means)
5 Lock structure 10 Crane (work machine)
REFERENCE SIGNS LIST 11 lower running body 12 upper swing body 13 swing frame 14 boom 15 mast 16 winch 17 lower spreader 18 counterweight 19 backstop device 20 guy link 21 upper spreader 22 boom hoisting rope 24 car body 25 crawler 26 car body weight 31 base 32 base Rail 33 Intermediate rail 34 Scaffolding rail 35 Fixed chain 36 Small sprocket 37 Chain 38 Large sprocket 39 Running chain 40 Sprocket 41, 42 Connecting beam 43, 44 Fixing member 45, 46 Folding part 47 Hole

Claims (6)

A scaffolding device provided on a lower traveling body of a working machine and arranged between a pair of left and right crawlers,
a movable scaffold disposed above the car body weight of the undercarriage and movable in the left-right direction, which is the direction connecting the crawlers;
a moving device for moving the movable scaffold in the horizontal direction;
has
The moving device moves the movable scaffolding between a storage position where the movable scaffolding is placed on the car body weight and a use position where the movable scaffolding projects toward the crawler from the storage position,
A pair of the movable scaffolds are arranged in the left-right direction above the car body weight,
A scaffolding device, wherein the moving device moves the pair of movable scaffolds so as to separate from or approach each other. The mobile device
a base rail fixed on the car body weight;
a scaffold rail fixed to the mobile scaffold and movable longitudinally relative to the base rail;
has
The scaffolding device according to claim 1 , wherein the moving device moves the movable scaffolding by moving the scaffolding rail with respect to the base rail. The moving device has an intermediate rail disposed between the base rail and the scaffolding rail and movable in the longitudinal direction of the base rail relative to the base rail,
the scaffolding rails are movable longitudinally of the base rails relative to the intermediate rails;
The base rail, the intermediate rail, and the scaffolding rail are interlocked so that the intermediate rail is always positioned between the base rail and the scaffolding rail,
The scaffolding device according to claim 2 , wherein the moving device moves the scaffolding rail relative to the base rail by moving the intermediate rail relative to the base rail. Having operation means operated by an operator to drive the moving device,
The scaffolding device according to any one of claims 1 to 3 , wherein the operating means is arranged at a position that does not interfere with the movable scaffolding. 5. The scaffolding device according to claim 4 , further comprising a lock structure for locking movement of said movable scaffolding with respect to said car body weight by locking driving of said moving device by said operating means. The scaffolding device according to any one of claims 1 to 5 , wherein the movable scaffolding is foldable so as to overlap vertically and has a foldable portion that can be expanded in the left-right direction. .

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