JP7396211B2 - construction machinery - Google Patents

Description

The present invention relates to construction machinery.

For example, construction machinery such as cranes, hydraulic excavators, pile drivers, etc. has an undercarriage that is equipped with a traveling means having a pair of crawlers, and is installed on this undercarriage so that it can rotate horizontally, and a boom that can be raised and lowered. It is known to include an upper revolving body to which the upper rotating body is attached.

Construction machines are assembled in a lying position at a work site, and are ready for work by raising and lowering their booms. For example, construction machines with long booms may become unstable during this raising and lowering. As a method to reduce this instability, a method is known in which a bottom plate is inserted between the front end of the crawler of the undercarriage and the ground to increase the rearward moment (for example, see Japanese Patent Application Laid-Open No. 2007-204236). ).

JP2007-204236A

This floor plate is stored in the construction machine, for example, when the machine is transported. As this storage location, for example, the side surface of the crawler frame, which has a relatively short distance of movement from the front end of the crawler during use, is used.

By the way, the floor plate needs to have enough strength to withstand the load applied from the front end of the crawler when the construction machine is standing on its own. On the other hand, in a construction machine with a large overall height that requires a bottom plate, the load becomes larger, so the bottom plate tends to be a heavy object.

Since the sides of the crawler frame are located under the crawler (shoe), it is difficult to suspend such heavy floor plates, and there is a need for an easier work of storing the floor plates.

The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to provide a construction machine equipped with a storage device that allows easy storage of floor plates.

A construction machine according to one aspect of the present invention is a construction machine including an undercarriage having a crawler frame and a crawler disposed on the crawler frame, the construction machine being disposed between a tip of the crawler and the ground. and a storage device for storing the bottom plate, the bottom plate having a plate-shaped bottom plate main body and a pair of shaft portions parallel to each other and spaced apart from each other. The bottom plate main body is rotatable about one of the shaft parts as a rotation axis, and the storage device has a support part that extends outward from the crawler frame and includes a recess that supports the one shaft part from below.

By using the storage device of the construction machine of the present invention, it is possible to easily store the floorboards.

FIG. 1 is a schematic side view showing a construction machine according to an embodiment of the present invention. FIG. 2 is a schematic enlarged view showing the bottom plate and storage device portion of FIG. 1. 3 is a schematic plan view showing the bottom plate of FIG. 1. FIG. FIG. 4 is a schematic front view showing a state in which one shaft portion of the bottom plate is placed on the storage device of FIG. 2. FIG. 5 is a schematic front view showing a state in which the bottom plate is stored in the storage device of FIG. 2. FIG. FIG. 6 is a schematic plan view showing a bottom plate different from the bottom plate shown in FIG. 3. FIG.

[Description of embodiments of the present invention]
A construction machine according to one aspect of the present invention is a construction machine including an undercarriage having a crawler frame and a crawler disposed on the crawler frame, the construction machine being disposed between a tip of the crawler and the ground. and a storage device for storing the bottom plate, the bottom plate having a plate-shaped bottom plate main body and a pair of shaft portions parallel to each other and spaced apart from each other. The bottom plate main body is rotatable about one of the shaft parts as a rotation axis, and the storage device has a support part that extends outward from the crawler frame and includes a recess that supports the one shaft part from below.

The construction machine is equipped with a concave portion in which the support section supports one shaft of the floor plate from below as a storage device for the floor plate.By placing one shaft of the floor plate in this recess, the weight of the floor plate is reduced. It can be supported. Further, the construction machine can be stored in the storage device by rotating the bottom plate about the one shaft portion. At this time, since the weight of the bottom plate is supported by the recess, the bottom plate can be rotated with a small force compared to its weight. Furthermore, in the construction machine, the floor plate can be easily lifted using the pair of shaft parts. Therefore, in the construction machine, the work of storing the floor plate can be easily performed.

It is preferable that the storage device has a fitting portion located above the recess and capable of fitting the one shaft with the other shaft while being supported by the recess. As described above, since the fitting part is located above the recess and is capable of fitting with the other shaft while the one shaft is supported by the recess, the other shaft can be connected to the fitting part. The bottom plate can be stored by fitting it into the bottom plate. Further, since the recess is located below the fitting portion, the distance for lifting the bottom plate to the recess is short, and the force required to place the bottom plate on the recess can be reduced. Therefore, the work of storing the bottom plate can be performed more easily. Note that the fitting portion may be any member that can maintain the retracted state of the bottom plate, and does not necessarily have a function of fixing the other shaft portion so that it does not move.

The storage device further includes a rotation inhibiting part, and the rotation inhibiting part is located closer to the crawler frame than a virtual straight line connecting the recessed part and the fitting part when viewed from the front, and the rotation inhibiting part is located on the crawler frame side, and It is preferable that the other shaft portion is configured to be prevented from rotating downwardly relative to the one shaft portion while being supported in the recessed portion by coming into contact with the upper surface of the bottom plate main body. By providing the rotation suppressing portion in this way, it is possible to prevent the bottom plate supported in the recess from rotating and falling. Note that "front view" in the storage device refers to viewing from a direction parallel to the side surface of the crawler frame of the construction machine.

When viewed from the front, the fitting portion is located closer to the crawler frame than the recess, and the angle between the vertical direction and the imaginary straight line connecting the recess and the fitting portion is preferably 20° or less. By locating the fitting portion in this manner, it is possible to stably hold the bottom plate while preventing the recess from protruding from the crawler frame.

The pair of shaft portions may protrude from the side edges of the bottom plate main body, and the bottom plate may further include a grip portion that connects the tips of the pair of shaft portions. With this configuration, the pair of shaft portions can be used as part of the handle of the bottom plate. Therefore, it is possible to suppress an increase in the weight of the bottom plate compared to a case where the shaft portion and the handle portion are provided separately.

It is preferable that the bottom plate main body has a hollow portion. By providing the hollow portion in the bottom plate main body in this manner, the weight of the bottom plate can be reduced.

[Details of embodiments of the present invention]
Hereinafter, a construction machine according to an embodiment of the present invention will be described with reference to the drawings as appropriate.

The construction machine 1 shown in FIG. The boom 4 is provided with a boom 4 which is an attachment that can be attached so as to be able to swing to stand upright, a hook 5, a wire rope 6 that hangs the hook 5 from the tip of the boom 4, and a winch 7 that winds up the wire rope 6.

The lower traveling body 2 includes a crawler frame 2a as a traveling device, and a crawler 2b disposed on the crawler frame 2a. The crawler frame 2a and the crawler 2b are provided on both sides of the lower traveling body 2 in the width direction, respectively. That is, the lower traveling body 2 has a pair of crawler frames 2a and crawlers 2b.

The upper revolving body 3 is provided with an operator's cabin 3a adjacent to the attachment portion of the boom 4, a boom hoisting winch (not shown) for hoisting the boom 4, and the like.

The boom 4 includes a base end 4a attached to the upper revolving body 3 so as to be swingable back and forth, and a tip end 4b attached to the base end 4a. The boom 4 also has a sheave at the tip 4b that guides the wire rope 6.

The hook 5 is fixed to the tip end 4b of the wire rope 6, and lifts a suspended load.

The wire rope 6 is wound around the winch 7 via a sheave at the tip 4b of the boom 4.

The winch 7 can move the hook 5 upward by winding up the wire rope 6, and can move the hook 5 downward by letting out the wire rope 6. The winch 7 may be installed on the back side of the boom 4 (the side that is on top when the boom 4 is extended and laid down) like the construction machine 1 in FIG. It may be installed in

Further, as shown in FIG. 2, the construction machine 1 includes a bottom plate 10 that is used while being arranged between the tip of the crawler 2b and the ground, and a storage device 20 that stores the bottom plate 10.

<Soil plate>
As shown in FIG. 3, the bottom plate 10 includes a rectangular bottom plate main body 11, and a pair of shaft portions 12 (first shaft portions 12a) that are parallel to one side 11a of the bottom plate main body 11 and spaced apart from each other in a direction perpendicular to the one side 11a. and a second shaft portion 12b). In the bottom plate 10 of FIG. 3, the bottom plate main body 11 has a rectangular shape, but the bottom plate main body 11 may have another shape, such as an elliptical shape.

The bottom plate 10 is used by being fitted between the front end of the crawler 2b and the ground so that one side 11a of the bottom plate main body 11 is in a direction that crosses the crawler 2b. Since the crawlers 2b are provided on both sides of the lower traveling body 2 in the width direction, the bottom plate 10 is also provided on each crawler 2b. That is, the construction machine 1 includes a pair of bottom plates 10.

The bottom plate main body 11 is plate-shaped. Further, the bottom plate main body 11 preferably has a hollow portion 11e. By providing the hollow portion 11e in the bottom plate main body 11 in this manner, the weight of the bottom plate 10 can be reduced. The bottom plate main body 11 having such a hollow portion 11e is composed of a pair of parallel thin plates and a plurality of support plates supporting between the pair of thin plates, as shown in FIG. Examples include a configuration in which a hollow portion 11e is provided between them, and a so-called honeycomb structure in which the hollow portion 11e is provided so that the cross section is hexagonal.

The length of the bottom plate main body 11 (the length of one side 11a in FIG. 3) is appropriately determined according to the width of the crawler 2b. Specifically, the length is equal to or slightly larger than the width of the crawler 2b. By setting the length of the bottom plate main body 11 to such a length, instability of the construction machine 1 can be more reliably eliminated. Further, it is preferable that the length of the bottom plate main body 11 be slightly larger than the width of the crawler 2b. When installing the bottom plate 10, it is easy to adjust the position between it and the crawler 2b.

The width of the bottom plate main body 11 (the length of the side 11b perpendicular to one side 11a of the bottom plate main body 11 shown in FIG. 3) is appropriately determined depending on the length of the crawler 2b in the front-rear direction, the center of gravity position of the construction machine 1, etc. Ru.

The thickness of the bottom plate body 11 is appropriately determined depending on the required strength. The thickness of the bottom plate body 11 is preferably uniform in the length direction. On the other hand, the thickness of the bottom plate main body 11 may be uniform in the width direction, but it is preferable that the thickness gradually increases toward one side. By using the bottom plate main body 11 with the thicker side facing the front end of the crawler 2b, the instability of the construction machine 1 can be more reliably eliminated.

The pair of shaft portions 12 have a cylindrical shape and protrude from a pair of side edges 11b perpendicular to one side 11a of the bottom plate body 11, respectively. That is, the pair of shaft portions 12 protrude from the side edges of the bottom plate main body 11. Specifically, the first shaft portion 12a is composed of a pair of parts that respectively protrude from the pair of side edges 11b, and the first shaft portion 12a, which is one shaft portion of the pair of shaft portions 12, is The bottom plate main body 11 can be rotated in the normal direction of its surface as a rotation axis. The first shaft portion 12a may be composed of one part, but it can also be composed of a plurality of parts in this way. When it is composed of a plurality of parts, it is preferable that they are arranged coaxially. In addition, the number of parts in the case of being composed of a plurality of parts is not limited to two as shown in FIG. 3, but can also be three or more. Further, the second shaft portion 12b can also be configured in the same manner as the first shaft portion 12a. Here, the "surface of the bottom plate main body" refers to the surface that comes into contact with the front end of the crawler 2b during use, and the surface on the back side thereof. Furthermore, the "normal direction to the surface of the bottom plate main body" does not need to be exactly 90° with respect to the surface, but may include an angular range of, for example, 80° or more, more preferably 85° or more. Furthermore, if there are irregularities on the surface of the bottom plate body, the average interface thereof shall be regarded as the surface for defining the normal direction.

As shown in FIG. 3, the bottom plate 10 further includes a grip part 13 that connects the tips of the pair of shaft parts 12. That is, the tips of each of the first shaft portion 12a and the second shaft portion 12b protruding from each side 11b are connected by the grip portion 13. Therefore, a total of two gripping portions 13 are provided, one for each of the pair of side edges 11b. In this way, the pair of shaft portions 12 may be provided on both sides of the bottom plate main body 11. With this configuration, the bottom plate 10 can be easily lifted using the pair of shaft parts 12. In addition, in FIG. 3, the tips of each of the first shaft part 12a and the second shaft part 12b protruding from each side 11b are connected by one grip part 13, but two or more grip parts They can also be connected by the grip part 13 of the.

The first shaft portion 12a, the second shaft portion 12b, and the grip portion 13 that connects them together function as a handle. Since the pair of shaft portions 12 are used as part of the handle in this manner, it is possible to prevent the weight of the bottom plate 10 from increasing compared to a case where the shaft portion 12 and the handle portion are provided separately. Further, it is possible to reduce the number of man-hours for manufacturing the floor plate 10 and to improve the ease of manufacturing.

As shown in FIG. 3, the pair of shaft portions 12 are arranged so as to sandwich the center of gravity G of the bottom plate body 11 in side view. The lower limit of the distance between the shaft portion 12 and the center of gravity G of the bottom plate main body 11 (L1 in FIG. 3) when viewed from the side is set to 20% is preferred, and 25% is more preferred. On the other hand, the upper limit of the distance L1 is preferably 40%, more preferably 35%, of the length L2 of the side 11b. If the distance L1 is less than the lower limit, in order to support one shaft portion 12 and make it rotatable, it will be necessary to provide a recess 21a, which will be described later, apart from the crawler frame 2a. Therefore, the recessed portion 21a may protrude from the crawler frame 2a, which may make transportation of the construction machine 1 difficult. On the other hand, if the distance L1 exceeds the upper limit, the center of gravity will be far away from one shaft 12 that serves as the rotation axis of the bottom plate 10, and the force required for rotation will increase, making it difficult to store the bottom plate 10. There is a risk that this will occur. Note that "side view" of the bottom plate refers to a view from a direction parallel to the central axis of the pair of shaft parts.

<Storage device>
As shown in FIG. 2, the storage device 20 includes a support portion 21 extending outward from the crawler frame 2a, a fitting portion 22, and a rotation suppressing portion 23. The storage device 20 is provided for each of the pair of bottom plates 10. That is, the construction machine 1 includes a pair of storage devices 20. The pair of storage devices 20 may be provided respectively for the pair of crawler frames 2a.

As shown in FIG. 4, the support portion 21 includes a recess 21a that supports one shaft portion 12 (first shaft portion 12a) of the pair of shaft portions 12 of the bottom plate 10 from below.

As shown in FIG. 2, in the construction machine 1, each part of the first shaft portion 12a protruding from the pair of sides 11b of the bottom plate main body 11 is supported by one recess 21a. That is, in the construction machine 1, the storage device 20 has a pair of support parts 21.

Note that the number of supporting parts 21 is not limited to one pair, and the storage device 20 can be configured to have one, or three or more supporting parts 21. Alternatively, one support portion 21 may include a plurality of recesses 21a. The number of these components to be provided is determined as appropriate, taking into account the configuration of the first shaft portion 12a, the weight of the bottom plate 10, and the like.

The fitting part 22 is located above the recess 21a of the support part 21, and as shown in FIG. 12, and is configured to be able to fit with the second shaft portion 12b.

The fitting part 22 has a pair of fitting parts 22 similarly to the support part 21, and is configured to be able to fit with each part of the second shaft part 12b. Similarly to the support portion 21, the number of fitting portions 22 provided is not limited to one pair.

As shown in FIG. 5, the storage device 20 further includes a pin 24 that prevents the second shaft portion 12b from separating from the fitting portion 22 when the second shaft portion 12b is fitted to the fitting portion 22. Good to have. This pin 24 can prevent the second shaft portion 12b, and eventually the floor plate 10, from falling off from the storage device 20 due to vibrations during transportation.

The fitting portion 22 is preferably located closer to the crawler frame 2a than the recess 21a when viewed from the front. In this case, the upper limit of the angle (θ in FIG. 5) between the virtual straight line connecting the recess 21a and the fitting portion 22 and the vertical direction is preferably 20°, more preferably 15°, and even more preferably 13°. When the angle θ exceeds the upper limit, it is necessary to provide the recess 21a apart from the crawler frame 2a in order to store the bottom plate 10. Therefore, the recessed portion 21a may protrude from the crawler frame 2a, which may make transportation of the construction machine 1 difficult. On the other hand, the angle θ can be set to 0°, but the angle θ is preferably greater than 0°, more preferably 5° or more, and even more preferably 8° or more. If the angle θ is less than the lower limit, the bottom plate 10 may not be stably held. Note that the "imaginary straight line connecting the recess 21a and the fitting part 22" refers to a straight line connecting the positions where the pair of shaft parts 12 are in contact with the recess 21a and the fitting part 22, respectively.

As shown in FIG. 5, the rotation suppressing portion 23 is located closer to the crawler frame 2a than the imaginary straight line connecting the recess 21a and the fitting portion 22 when viewed from the front, and as shown in FIG. The second shaft portion 12b, which is the other shaft portion 12, rotates downwardly relative to the first shaft portion 12a while the first shaft portion 12a is supported by the recess 21a. It is configured to be restrained by contact with the

In the construction machine 1, as shown in FIG. 2, the rotation suppressing part 23 is constituted by a rod-shaped body that spans a pair of supporting parts 21. As shown in FIG. 4, the rotation suppressing portion 23 is configured to move from the upper surface 11c side of the bottom plate main body 11 to the lower surface 11d side with the first shaft portion 12a supported in the recess 21a. The upper surface 11c and the bottom of the recess 21a are arranged in this order. In other words, the bottom plate main body 11 is configured to be insertable between the rotation suppressing portion 23 and the recess 21a.

Further, as shown in FIG. 4, when the second shaft portion 12b side is rotated downward, the upper surface 11c of the bottom plate main body 11 on the first shaft portion 12a side comes into contact with the rotation suppressing portion 23, and the second shaft portion It is configured such that the 12b side cannot be rotated downward. By providing the rotation suppressing portion 23 in this manner, it is possible to suppress the bottom plate 10 supported by the recess 21a from rotating and falling.

In a state where the upper surface 11c of the bottom plate main body 11 is in contact with the rotation suppressing portion 23, the second shaft portion 12b side is preferably located above the first shaft portion 12a side. By inhibiting the rotation of the bottom plate 10 in this manner with the second shaft portion 12b side located above the first shaft portion 12a side, the bottom plate 10 can be made difficult to fall.

<How to use the storage device>
The storage device 20 of the construction machine 1 can be used in a method including a mounting process, a rotation process, and a fitting process.

(Placement process)
In the above-described placement step, the first shaft portion 12a is placed in the recess 21a of the support portion 21.

In this step, for example, the floor plate 10 is lifted horizontally from the ground to the same height as the recess 21a of the support part 21 using a lifting device. The lifted floor plate 10 is brought close to the storage device 20.

At this time, it is difficult to bring the floor plate 10 into complete contact with the storage device 20 due to the presence of the crawler 2b. The single shaft portion 12a is placed in the recess 21a of the support portion 21. This step can be carried out with the bottom plate 10 suspended horizontally. In other words, there is no need to raise the bottom plate 10 in the vertical direction at this stage, so it can be done with a relatively small force.

Moreover, if the bottom board 10 is placed in the recess 21a of the support part 21, the lifting of the bottom board 10 by the lifting device will be stopped, but in this case, as shown in FIG. It is possible to prevent the bottom plate 10, which is in contact with the portion 23 and supported by the recessed portion 21a, from rotating and falling. Therefore, there is no need for the operator to continue supporting the bottom plate 10.

In addition, when the bottom board 10 is lightweight, the above-mentioned installation process can also be performed manually without using a lifting device. Even in this case, if the bottom plate 10 is placed in the recess 21a of the support portion 21, there is no need for the operator to continue supporting the bottom plate 10. Therefore, even if it is performed manually, this mounting process can be performed with little effort.

(rotation process)
In the above-described rotation step, after the above-described placement step, the other shaft portion 12 (second shaft portion 12b) side of the bottom plate 10 is rotated upward using the first shaft portion 12a of the bottom plate 10 as a rotation axis.

In this step, as shown in FIG. 4, the bottom plate main body 11 is rotated using the end portion on the second shaft portion 12b side as the point of action M. At this time, since the distance from the rotation axis to the point of action M is longer than the distance from the first shaft portion 12a, which is the rotation axis, to the center of gravity G, a force smaller than the weight of the bottom plate 10 due to the principle of leverage is generated. The bottom plate 10 can be rotated by pressing the button.

Note that this rotation is performed until the second shaft portion 12b reaches the position shown in FIG. 5, that is, the position of the fitting portion 22. If the fitting part 22 is located closer to the crawler frame 2a than the recess 21a when viewed from the front, it will be stable after this rotation is completed, so there is no need for the operator to continue supporting the bottom plate 10 to prevent it from rotating in the opposite direction. .

(Fitting process)
In the fitting step, the second shaft portion 12b of the bottom plate 10 is fitted into the fitting portion 22 after the rotation step.

In this step, as shown in FIG. 5, for example, a pin 24 is inserted to prevent the second shaft portion 12b from separating from the fitting portion 22.

As described above, the bottom plate 10 can be stored in the storage device 20. In addition, when using the bottom plate 10 stored in the storage device 20, it is preferable to take it out by following the reverse procedure to that described above.

<Advantages>
In the construction machine 1, as a storage device 20 for the bottom plate 10, the support portion 21 is provided with a recess 21a for supporting the first shaft portion 12a of the bottom plate 10 from below. By placing it on 21a, the weight of the bottom plate 10 can be supported. Further, the construction machine 1 can be stored in the storage device 20 by rotating the bottom plate 10 about the first shaft portion 12a. At this time, since the weight of the bottom plate 10 is supported by the recess 21a, the bottom plate 10 can be rotated with a small force compared to its weight. Furthermore, in the construction machine 1, the floor plate 10 can be easily lifted using the pair of shaft parts 12. Therefore, in the construction machine 1, the work of storing the bottom plate 10 can be easily performed.

In addition, in the construction machine 1, the storage device 20 is located above the recess 21a, and has a fitting portion 22 that can be fitted to the second shaft portion 12b while the first shaft portion 12a is supported by the recess 21a. Therefore, the bottom plate 10 can be stored by fitting the second shaft portion 12b into the fitting portion 22. Furthermore, since the recess 21a is located below the fitting portion 22, the distance for lifting the bottom plate 10 to the recess 21a is short, and the force required to place the bottom plate 10 on the recess 21a can also be reduced. Therefore, the work of storing the bottom plate 10 can be performed more easily.

[Other embodiments]
The above embodiments do not limit the configuration of the present invention. Therefore, in the above embodiment, it is possible to omit, replace, or add the constituent elements of each part of the above embodiment based on the description of this specification and common general technical knowledge, and all of these are interpreted as falling within the scope of the present invention. Should.

The construction machine of the present invention is not limited to the configuration shown in FIG. For example, a construction machine may be equipped with a shovel, a pile driver, or the like instead of a hook. Further, the present invention may be a construction machine with a tower specification in which a jib is attached to the tip of the boom, or a construction machine with a luffing jib specification in which the jib angle can be changed arbitrarily.

In the above embodiment, a case has been described in which the pair of shaft parts are used as part of the handle, but the pair of shaft parts and the handle can also be provided separately. For example, like the shaft portion 15 provided on the upper side of the bottom plate 14 in FIG. 6, a configuration includes a pair of support rods protruding from one side 11a of the bottom plate main body 11, and a rotating shaft connecting the tips of the support rods. You can also use it as Also, like the shaft portion 16 provided on the tongueable piece of the bottom plate 14 in FIG. It is also possible to use the area as the shaft portion 16. That is, in the bottom plate 14 of FIG. 6, the shaft part 15 provided on the upper side of the bottom plate 14 and the shaft part 16, which is the area sandwiched between the through hole and one side 11a of the bottom plate main body 11, function as a pair of shaft parts. .

In the above embodiment, a case has been described in which the pair of shafts are arranged so as to sandwich the center of gravity of the bottom plate body in side view, but this arrangement is not an essential component, and the pair of shafts are arranged together in side view. The present invention also contemplates a configuration in which the base plate is disposed on one side of the center of gravity of the bottom plate body.

In the above embodiment, a case has been described in which the storage device has a rotation suppressing part, but the rotation suppressing part is not an essential component and can be omitted.

Moreover, the rotation suppressing part is not limited to a rod-shaped body that spans the pair of supporting parts. For example, it may be a plate-shaped body extending outward from the crawler frame.

In the above embodiment, the storage device is located above the recess and has a fitting portion that can fit with the other shaft while one shaft is supported by the recess. The structure of the joint is not limited to this. For example, the present invention also contemplates a configuration in which the fitting portion is located below the recess, and a configuration in which the fitting portion fits into a portion other than the other shaft portion. In addition, as a structure in which the fitting part fits with something other than the other shaft part, for example, a structure in which the fitting part fits with a bracket or a hook provided on the bottom plate main body can be mentioned.

As described above, by using the storage device included in the construction machine of the present invention, the work of storing the floorboards can be easily performed.

1 Construction machine 2 Lower traveling body 2a Crawler frame 2b Crawler 3 Upper revolving body 3a Cabin 4 Boom 4a Base end 4b Tip 5 Hook 6 Wire rope 7 Winches 10, 14 Bottom plate 11 Bottom plate main body 11a One side 11b Side side 11c Top surface 11d Bottom surface 11e Hollow parts 12, 15, 16 Shaft part 12a First shaft part 12b Second shaft part 13 Grip part 20 Storage device 21 Support part 21a Recessed part 22 Fitting part 23 Rotation suppressing part 24 Pin G Center of gravity M Point of action

Claims (6)

A construction machine comprising a lower running body having a crawler frame and a crawler disposed on the crawler frame,
A floor plate used by being placed between the tip of the crawler and the ground;
and a storage device for storing the bottom plate,
The above board is
A plate-shaped bottom plate body,
a pair of shaft portions spaced parallel to each other;
The bottom plate main body can be rotated using one of the pair of shafts as a rotation axis,
The storage device is
A construction machine having a support section that extends outward from the crawler frame and includes a recess that supports the one shaft section from below. The construction machine according to claim 1, wherein the storage device has a fitting portion located above the recess and capable of fitting the one shaft with the other shaft while being supported by the recess. The storage device further includes a rotation suppressing part,
The rotation suppressing portion is located closer to the crawler frame than the imaginary straight line connecting the recess and the fitting portion when viewed from the front, and the one shaft is supported by the recess while the other shaft is supported by the recess. The construction machine according to claim 2, wherein the construction machine is configured to prevent rotational movement downward from the one shaft portion by contacting the upper surface of the bottom plate body. When viewed from the front, the fitting portion is located closer to the crawler frame than the recess,
The construction machine according to claim 2 or 3, wherein an angle formed between a virtual straight line connecting the recessed portion and the fitting portion and the vertical direction is 20° or less. The pair of shaft portions protrude from the side edges of the bottom plate main body,
The construction machine according to any one of claims 1 to 4, wherein the bottom plate further includes a grip portion that connects the tips of the pair of shaft portions. The construction machine according to any one of claims 1 to 5, wherein the bottom plate body has a hollow portion.

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