JP2019014573A - Construction machine and jack-up method of construction machine - Google Patents

Abstract

To provide a construction machine having a large jack-up amount.SOLUTION: The construction machine includes a lower part traveling body having a base frame, an upper part revolving body revolvably provided over the base frame, and a plurality of jack-up devices provided on the base frame. The jack-up device includes a hydraulic cylinder unit having a cylinder vertically mounted on the base frame and a rod provided to reciprocate inside the cylinder and a float which is placed on the ground and abutted on a lower end of the rod. At least one of the rod and the float includes a telescopic mechanism varying the length of an abutment direction of it with respect to the other one.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a construction machine and a construction machine jack-up method.

  For example, a construction machine such as a crane or a hydraulic excavator is generally provided with a lower traveling body having traveling means such as a crawler and a tire, and is provided on the lower traveling body so as to be able to turn in a horizontal direction, and a boom is swingably attached. An upper swing body. In particular, construction machines having crawlers are not allowed to travel on general roads, and are therefore loaded on trailers and transported to work sites.

  Such a construction machine includes, for example, a jack-up device that is provided in a lower traveling body and lifts the lower traveling body together with the upper swing body, as described in JP-A-2007-230747. The construction machine can be loaded on the trailer by moving the trailer below the lower traveling body in a state where the lower traveling body is lifted by the jack-up device.

  Usually, the jack-up device of a construction machine has a hydraulic cylinder that expands and contracts in the vertical direction. In the construction machine, a part of the upper swinging body protrudes outward in the horizontal direction from the lower traveling body, and can be arranged above the jackup device when turning. For this reason, the jack-up device must be disposed below the bottom surface of the upper swing body when not in use. Further, the jack-up device must be disposed at a position sufficiently higher than the crawler installation surface so that it does not contact the ground when the construction machine moves and does not contact the bottom surface when not in use. For this reason, since the length of the up-down direction when the jack-up device is not used is limited, it is difficult to increase the jack-up amount.

  For this reason, in the conventional construction machine, the stroke of the jackup device is insufficient when loading on the trailer, and the lower traveling body may not be sufficiently lifted from the ground. In such a case, a sleeper-like girder is arranged at a position where the cylinder of the jack-up device on the ground is arranged to compensate for the stroke of the jack-up device. Similarly, it is necessary to arrange the girders when the construction machine is lowered from the trailer.

  The loading and unloading of construction machinery using girders is very cumbersome, and the girders that can support the weight of construction machinery are heavy in themselves, so carefulness is required to ensure safety. Work.

JP 2007-230747 A

  In view of the above disadvantages, an object of the present invention is to provide a construction machine having a large jack-up amount and a jack-up method for the construction machine.

  A construction machine according to an aspect of the present invention, which has been made to solve the above problems, includes a lower traveling body having a base frame, an upper revolving body that is pivotably disposed on the base frame, and the base frame. A construction machine comprising a plurality of jackup devices arranged, wherein the jackup device includes a cylinder vertically attached to the base frame and a rod arranged to be reciprocally movable in the cylinder. A cylinder unit; and a float that is placed on the ground and abuts the lower end of the rod, and one of the rod and the float has a telescopic mechanism that varies the length of the abutment direction with respect to the other. It is characterized by that. Note that “variing the length of the contact direction with respect to the other of itself” means that the length of the rod or the float itself changes.

  In the construction machine, the rod of the hydraulic cylinder unit or the float that contacts the rod has an expansion / contraction mechanism, so that the rod is protruded from the cylinder and a rigid support is placed under the cylinder or the lower traveling body. If a cylinder or a lower traveling body is placed on the top, the telescopic mechanism can be extended. Thereby, the construction machine can realize a large jack-up amount exceeding the stroke of the hydraulic cylinder unit, and can jack up the lower traveling body to a higher position.

  In the construction machine, the expansion / contraction mechanism may be disposed on the rod or the main body of the float so as to be able to retreat, and may include an adjustment member that contacts the float or the rod. According to this configuration, the extension / contraction mechanism can increase the jack-up amount by adjusting the length of the rod or the float by the protrusion and retraction of the adjustment member having a contact surface with the float or the rod.

  The construction machine may further include a receptacle that can be disposed between the cylinder and the float, and the adjustment member may be screwed onto the rod or the main body of the float. According to this configuration, the receiver disposed between the cylinder and the float is relatively small and easy to handle. Further, the adjustment member screwed into the rod or the float main body can be rotated and retreated with respect to the rod or the float so that the rod or the float can be easily expanded and contracted. .

  In the construction machine, the receiver may surround the rod so that one side is opened in a plan view. According to this configuration, the cylinder can be reliably supported while the placement and removal of the receiver are easy.

  In the construction machine, the jack-up device may further include a detachable reinforcing member on an outer periphery of the adjusting member in a state where the receiving member is disposed. According to this configuration, since the adjusting member is reinforced by attaching the reinforcing member, the shape of the rod and the hydraulic cylinder unit can be reduced in the same manner as a jackup device of a conventional construction machine.

  In the construction machine, the reinforcing member may be open on one side of the adjusting member in plan view. According to this configuration, the reinforcing member can be easily attached and detached.

  A construction machine jack-up method according to another aspect of the present invention includes a lower traveling body having a base frame, an upper revolving body that is pivotably disposed on the base frame, and the base frame. A jack-up method for a construction machine comprising a plurality of jack-up devices, wherein the jack-up device includes a cylinder vertically attached to the base frame and a rod that is reciprocally moved in the cylinder. A hydraulic cylinder unit having a float that is placed on the ground and that abuts against the lower end of the rod, and one of the rod and the float has a telescopic mechanism that varies the length in the abutting direction with respect to the other of itself. A first step of projecting the rod from the cylinder, and after the first step, the cylinder Is a second step of placing a rigid receiver under the lower traveling body, and after the second step, the cylinder or the lower traveling body is placed on the receiver by retracting the rod into the cylinder. A third step of placing, a fourth step of extending the telescopic mechanism after the third step, and a fifth step of projecting the rod from the cylinder after the fourth step. .

  In the construction machine jack-up method, a hydraulic cylinder unit is used to place the cylinder or the lower traveling body on the support and extend the telescopic mechanism in a state where the rod and the float are separated from each other. The lower traveling body can be lifted to a higher position by the hydraulic cylinder unit.

  As described above, the construction machine and the construction machine jack-up method according to the present invention have a large jack-up amount.

It is a typical side view showing the construction machine of one embodiment of the present invention. It is a schematic plan view of the lower traveling body of the construction machine of FIG. It is a typical fragmentary sectional side view of the jackup apparatus of the construction machine of FIG. It is a typical expanded sectional view of the lower end part of the jackup apparatus of FIG. It is typical AA sectional view taken on the line of the jackup apparatus of FIG. It is a schematic diagram which shows one process of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 6 of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 7 of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 8 of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the process of FIG. 9 of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 10 of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 11 of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 12 of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 13 of the jackup by the jackup apparatus of FIG. It is a typical expanded sectional view of the lower end part of the jackup apparatus which concerns on embodiment different from FIG. It is a schematic diagram which shows one process of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 16 of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 17 of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 18 of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 19 of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 20 of the jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 21 of jackup by the jackup apparatus of FIG. It is a schematic diagram which shows the next process of FIG. 22 of the jackup by the jackup apparatus of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[First embodiment]
FIG. 1 shows a crawler crane which is an embodiment of a construction machine according to the present invention.

  The construction machine includes a self-propelled lower traveling body 1, an upper revolving body 2 provided on the lower traveling body 1 so as to be horizontally rotatable, and a plurality of jack-up devices 3 disposed on the lower traveling body 1. And a crane attachment (work tool) 4 provided on the upper swing body 2.

  As shown in FIG. 2, the lower traveling body 1 includes a main frame 5 that supports the upper swing body 2, a crawler frame 6 provided on the main frame 5, and a pair of crawlers ( Track) 7. The jackup device 3 is attached to the main frame 5.

<Jack-up device>
The jackup device 3 is a translifter that lifts the lower traveling body 1. The construction machine can be loaded on the trailer by moving the trailer below the lower traveling body 1 while the lower traveling body 1 is lifted by the jack-up device 3.

  As shown in FIG. 3, the jack-up device 3 includes a cylinder 9 attached to the main frame 5 via a swing arm 8 so that the shaft is vertical, and a rod 10 that is reciprocally moved in the cylinder 9. And a float 12 that is placed on the ground and contacts the lower end of the rod 10.

  Further, as shown in detail in FIG. 4, the rod 10 of the jack-up device 3 has a rod main body 13 and a lower end of the rod main body 13 vertically as an expansion / contraction mechanism that changes the length in the abutting direction with respect to the float 12. And an adjustment member 14 which is disposed so as to be capable of protruding and retracting in the direction and which contacts the float 12.

  The jack-up device 3 further includes a rigid receiving member 15 that can be disposed between the cylinder 9 and the float 12 and a reinforcing member 16 that can be attached to and detached from the outer periphery of the adjusting member 14.

(Cylinder)
The cylinder 9 has a flat support surface 17 facing the float 12 at the lower end outside the rod 10 so that the cylinder 9 can be placed on the receiving member 15. The support surface 17 can be formed, for example, by extending a bushing that fills the gap between the lower end of the cylinder 9 and the rod 10 to the outside in a flange shape.

(rod)
The rod body 13 of the rod 10 has a screw hole 18 formed at the lower end so as to open in the axial direction, and a lower end surface 19 that is flat around the screw hole 18 and abuts against the reinforcing member 16.

  On the other hand, the adjustment member 14 of the rod 10 includes a screw portion 20 that is screwed into the screw hole 18 of the rod main body 13, and a head portion 21 that is connected to the lower end of the screw portion 20. The head 21 has a flat upper surface 22 that faces the lower end surface 19 of the rod body 13 and abuts against the reinforcing member 16, and a lower surface 23 that is formed in a spherical shape that swells downward and abuts on the float 12.

  Moreover, it is preferable that the adjustment member 14 has an engagement structure in which a tool for rotating the adjustment member 14 can be engaged with the head. As this engagement structure, for example, a hexagonal hole for a hexagonal wrench formed in the axial direction on the lower end surface, a parallel surface for a spanner formed on the outer periphery at least one pair, and a shaft-like tool can be inserted through in the radial direction. A through hole or the like can be employed.

  As described above, the rod 10 having the expansion / contraction mechanism can increase the jackup amount without increasing the vertical length of the jackup device 3 (particularly, the hydraulic cylinder unit 11). Thereby, the construction machine can lift the lower traveling body 1 to a higher position by the jack-up device 3, and can easily be loaded on a trailer having a high floor surface.

  In addition, by constituting the expansion / contraction mechanism of the rod 10 by the rod main body 13 and the adjusting member 14 screwed into the rod main body 13, the expansion and contraction of the rod 10 is simple and easy and reliable.

(float)
The float 12 has a recess 24 that receives the lower end of the rod 10, that is, the head portion 21 of the adjustment member 14, and a flat mounting on which the support 15 can be placed so as to face the support surface 17 of the cylinder 9 around the recess 24. It can be set as the structure which has the mounting surface 25. FIG.

  The support 15 is disposed between the cylinder 9 and the float 12 so as to support the weight of the cylinder 9 and thus the construction machine, and to temporarily remove the load on the rod 10. In the construction machine, the adjustment member 14 can be protruded or retracted with respect to the rod body 13 by supporting the construction machine with the support 15.

  As shown in FIG. 5, the receiver 15 is preferably formed so as to surround the lower portion of the rod 10 so that one side is opened in a plan view. Specifically, the receiver 15 can be formed in a U shape in plan view. Thus, when one side of the receiving tool 15 is open, the receiving tool 15 can be easily disposed and removed, and jacking up of the construction machine is simplified. Further, since the receiving member 15 surrounds the lower portion of the rod 10, the cylinder 9 and thus the weight of the construction machine can be reliably supported.

  The reinforcing member 16 is attached to the threaded portion of the adjustment member 14 and is sandwiched between the lower end surface of the rod body 13 and the upper surface 22 of the head portion 21 of the adjustment member 14. Thereby, since the breakage of the screw portion 20 of the adjusting member 14 can be prevented, the diameter of the rod 10 can be made the same as the diameter of the rod of the conventional jackup device, and the jackup device 3 does not increase in size. .

  As shown in FIG. 5, the reinforcing member 16 preferably has a shape such as a U shape in which one side of the adjusting member 14 is opened in a plan view. Since the reinforcing member 16 has such a shape, the reinforcing member 16 can be easily attached to and detached from the adjusting member 14.

<Jack-up method>
The construction machine jack-up method includes a first step of projecting the rod 10 from the cylinder 9, a second step of placing the receiving tool 15 under the cylinder 9 after the first step, and a second step of the second step. A third step of placing the cylinder 9 on the receiving member 15 by retracting the rod 10 into the cylinder 9, a fourth step of extending the telescopic mechanism of the hydraulic cylinder unit 11 after the third step, And a fifth step of projecting the rod 10 from the cylinder 9 after the four steps.

  In the first step, as shown in FIG. 6, the float 12 is arranged immediately below the rod 10 of the hydraulic cylinder unit 11, and as shown in FIG. Lift the frame 5 upward.

  In the second step, as shown in FIG. 8, the receiver 15 is placed on the placement surface 25 of the float 12.

  In the third step, as shown in FIG. 9, the rod 10 is retracted into the cylinder 9 so that no load is applied to the adjustment member 14.

  In the fourth step, the adjustment member 14 is protruded from the rod body 13 to extend the rod 10. In the fourth step, in order to reinforce the adjusting member 14 with the reinforcing member 16, as shown in FIG. 10, the adjusting member 14 projects beyond the length of the reinforcing member 16 from the rod body 13, and the step shown in FIG. The step of placing the reinforcing member 16 on the upper surface 22 of the head 21 of the adjusting member 14 and the adjusting member 14 until the reinforcing member 16 contacts the lower end surface 19 of the rod main body 13 as shown in FIG. And a step of retracting into the position 13.

  In the fifth step, as shown in FIG. 13, the rod 10 is protruded from the cylinder 9 to lift the cylinder 9 and thus the lower traveling body 1. Thereafter, as shown in FIG. 14, the receiver 15 may be removed from the float 12.

<Advantages>
As described above, in the construction machine, the adjustment member 14 of the rod 10 is attached to the rod body 13 in a state where the cylinder 9 is placed on the support 15 by the hydraulic cylinder unit 11 and the rod 10 and the float 12 are separated from each other. The rod 10 can be extended by projecting it. Thereby, the construction machine can lift the lower traveling body 1 by the jackup device 3 with a jackup amount larger than the movable amount of the rod 10 with respect to the cylinder 9. Therefore, the construction machine can be easily loaded on a trailer or the like having a relatively high bed floor.

[Second Embodiment]
FIG. 15 shows a main part of a jack-up device 3a for a construction machine according to another embodiment of the present invention. The jack-up device 3a shown in FIG. 15 can be used in place of the jack-up device 3 shown in FIG. That is, the construction machine according to the present embodiment is obtained by replacing the jackup device 3 of the construction machine of FIG. 1 with the jackup device 3a of FIG. For this reason, in description of this embodiment, the same code | symbol is attached | subjected to the same component as 1st Embodiment, and the overlapping description is abbreviate | omitted.

<Jack-up device>
The jack-up device 3a includes a cylinder 9 attached to the main frame 5 via a swing arm 8 so that its axis is vertical, and a hydraulic cylinder unit 11a having a rod 10a disposed in the cylinder 9 so as to be reciprocally movable. The float 12a is placed on the ground and abuts against the lower end of the rod 10a.

  In this jack-up device 3a, the rod 10a does not have an expansion / contraction mechanism, and the float 12a has an expansion / contraction mechanism that varies the length in the abutting direction with respect to the rod 10a itself.

  Specifically, the float 12a includes, as an expansion / contraction mechanism, a float main body 26 that is placed on the ground, and an adjustment member 27 that is screwed into the float main body 26 and is in contact with the rod 10a.

  The float body 26 has a vertical screw hole 28 that opens to the upper end, and a flat mounting surface 29 that is positioned around the screw hole 28. The adjustment member 27 includes a screw portion 30 that is screwed into the screw hole 28 of the float body 26, and a head portion 31 that is connected to the upper end of the screw portion 30. The head portion 31 has a concave portion 32 that receives the lower end of the rod 10 a on the upper side, and a flat lower surface 33 that is adjacent to the upper end of the screw portion 30 and faces the mounting surface 29 of the float body 26.

  The jack-up device 3a further includes a rigid receiving member 34 that can be disposed between the cylinder 9 and the float 12a, and a reinforcing member 35 that can be attached to and detached from the outer periphery of the screw portion 30 of the adjusting member 27.

<Jack-up method>
The construction machine jack-up method includes a first step in which the rod 10a protrudes from the cylinder 9, a second step in which the receiving member 34 is disposed under the cylinder 9 after the first step, and after the second step. A third step of placing the cylinder 9 on the support 34 by retracting the rod 10a into the cylinder 9, a fourth step of extending the telescopic mechanism of the hydraulic cylinder unit 11a after the third step, After the fourth step, a fifth step of projecting the rod 10a from the cylinder 9 is provided.

  In the first step, the float 12a is disposed immediately below the rod 10a of the hydraulic cylinder unit 11a, and the rod 9a protrudes from the cylinder 9 as shown in FIG.

  In the second step, as shown in FIG. 17, the receiver 34 is placed on the placement surface 29 of the float 12a.

  In the third step, as shown in FIG. 18, the rod 10 a is retracted into the cylinder 9 so that no load is applied to the adjustment member 27.

  In the fourth step, the adjustment member 27 is protruded from the float body 26 to extend the float 12a. In the fourth step, in order to reinforce the adjusting member 27, the adjusting member 27 protrudes beyond the length of the reinforcing member 35 from the float main body 26 as shown in FIG. 19, and the float main body as shown in FIG. The step of mounting the reinforcing member 35 on the mounting surface 29 of 26, and the adjusting member 27 in the float body 26 until the reinforcing member 35 contacts the lower surface 33 of the head 31 of the adjusting member 27 as shown in FIG. And a step of retracting.

  In the fifth step, as shown in FIG. 22, the rod 10 a is protruded from the cylinder 9 to lift the cylinder 9 and thus the lower traveling body 1. Thereafter, as shown in FIG. 23, the support 34 may be removed from the float 12a.

<Advantages>
As described above, the construction machine can lift the lower traveling body 1 with a jackup amount larger than the movable amount of the rod 10a with respect to the cylinder 9 by the jackup device 3a.

[Other Embodiments]
The said embodiment does not limit the structure of this invention. Therefore, in the above-described embodiment, the components of each part of the above-described embodiment can be omitted, replaced, or added based on the description and common general knowledge of the present specification, and they are all interpreted as belonging to the scope of the present invention. Should.

  The construction machine does not have a dedicated receiver, and for example, a sleeper-like wood or the like may be disposed between the lower traveling body and the ground and used as a receiver.

  The expansion / contraction mechanism in the construction machine is not limited to one using screws. Moreover, the telescopic mechanism in the construction machine may use a detachable adjusting member that extends the rod or float by attaching to the rod or float.

  The jack-up device for the construction machine may be one in which expansion and contraction mechanisms are provided on both the rod and the float.

  The construction machine according to the present invention can be suitably used particularly for construction machines that cannot travel on public roads such as crawler cranes.

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper turning body 3, 3a Jack up apparatus 4 Crane attachment 5 Main frame 6 Crawler frame 7 Crawler 8 Swing arm 9 Cylinder 10, 10a Rod 11, 11a Hydraulic cylinder unit 12, 12a Float 13 Rod main body 14 Adjustment Member 15 Receiving member 16 Reinforcing member 17 Support surface 18 Screw hole 19 Lower end surface 20 Screw portion 21 Head portion 22 Upper surface 23 Lower surface 24 Recess 25 Mounting surface 26 Float body 27 Adjustment member 28 Screw hole 29 Mounting surface 30 Screw portion 31 Head Portion 32 Recess 33 Lower surface 34 Receiving member 35 Reinforcing member

Claims (7)

A lower traveling body having a base frame;
An upper revolving unit disposed on the base frame so as to be able to swivel;
A construction machine comprising a plurality of jack-up devices arranged on the base frame,
The jack-up device is
A hydraulic cylinder unit having a cylinder vertically attached to the base frame and a rod disposed in the cylinder so as to be reciprocally movable;
A float placed on the ground and in contact with the lower end of the rod,
A construction machine, wherein at least one of the rod and the float has an expansion / contraction mechanism that varies a length in a contact direction with respect to the other of the rod and the float.   The construction machine according to claim 1, wherein the expansion and contraction mechanism is disposed so as to be able to project and retreat on the rod or the main body of the float, and has an adjustment member that comes into contact with the float or the rod. A receiving device that can be disposed between the cylinder and the float;
The construction machine according to claim 2, wherein the adjustment member is screwed into the rod or the main body of the float.   The construction machine according to claim 3, wherein the receptacle surrounds the rod so that one side is opened in a plan view.   The construction machine according to claim 3 or 4, further comprising a reinforcing member that can be attached to and detached from an outer periphery of the adjusting member in a state in which the jackup device arranges the receiving member.   The construction machine according to claim 5, wherein the reinforcing member is open on one side of the adjusting member in plan view. A jacking-up method for a construction machine, comprising: a lower traveling body having a base frame; an upper swinging body that is swingably disposed on the base frame; and a plurality of jackup devices that are disposed on the base frame. And
As the jack-up device, a cylinder vertically mounted on the base frame and a hydraulic cylinder unit having a rod that is reciprocally moved in the cylinder, and a float that is placed on the ground and contacts the lower end of the rod And having a telescopic mechanism that varies the length in the abutting direction with respect to the other of either the rod or the float.
A first step of projecting the rod from the cylinder;
After the first step, a second step of placing a rigid receiver under the cylinder or the lower traveling body,
After the second step, a third step of placing the cylinder or the lower traveling body on the receptacle by retracting the rod into the cylinder;
A fourth step of extending the telescopic mechanism after the third step;
A jackup method for a construction machine, comprising: a fifth step of causing the rod to protrude from the cylinder after the fourth step.

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