Reverse self-propelled device and reverse self-propelled method for pile driving machine

Abstract

To provide a self retreat traveling device capable of gripping a casing and an existing sheet pile together regardless of types of sheet piles to be pressed-in and a self retreat traveling method of a pile press-in machine.SOLUTION: A self retreat traveling device 40 used for a pile press-in machine pressing-in a sheet pile P using an auger device is provided with: a body part 41 in which an opening 42 to which a cylindrical casing 12 of the auger device can be inserted is formed; a flexible wall part 51 disposed on an upper side of the body part 41 and moving closer to or apart from the casing 12 to hold the casing 12 to be inserted in the opening 42; and a holding part 70 disposed on a lower side of the body part 41 to hold the sheet pile P and the casing 12 to be inserted to the opening 42.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a reverse self-propelling device attached to a pile press-in machine and a method for reverse self-propelling of a pile press-in machine.

Background Art

[0002] When pressing sheet piles such as hat-shaped steel sheet piles or U-shaped steel sheet piles into hard ground such as a gravel layer containing pebbles or a rock formation, a pile press-in machine equipped with an auger device may be used. As described in Patent Document 1, the auger device is a device having an auger screw for excavating the ground and a cylindrical casing surrounding the auger screw.

[0003] When performing the press-in of the sheet pile using the above-described auger device, while excavating the ground with an auger head at the lower end of the auger screw, the casing and the auger screw are lowered, and at the same time, the sheet pile is also pressed in.

[0004] And after pressing the planned number of sheet piles into the ground, reverse self-propelling of the pile press-in machine located on the existing sheet pile may be performed. In order to perform such reverse self-propelling of the pile press-in machine, a reverse self-propelling device is attached to the lower end of a chuck device that grips the sheet pile and the casing. This reverse self-propelling device is an attachment for imparting a reverse self-propelling function to the pile press-in machine. As a technique related to the reverse self-propelling of the pile press-in machine, Patent Document 2 discloses an auxiliary device for self-propelling of a pile press-in / pull-out machine.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] As described above, the retraction self-propelled device is attached to the chuck device. For example, the retraction self-propelled device 150 shown in Figure 1(a) is attached to the lower end of the chuck device for hat-shaped steel sheet piles. Figure 1(a) is a perspective view showing an example of a conventional retraction self-propelled device gripping an existing hat-shaped steel sheet pile, and Figure 1(b) is a schematic plan view showing the state in which both the casing and the existing hat-shaped steel sheet pile are gripped by the retraction self-propelled device and the chuck device.

[0007] As shown by the dashed line in Figure 1(b), when using a self-propelled reversing device for hat-shaped steel sheet piles, there is a part G1 in the reversing device that grips the flange of the hat-shaped steel sheet pile and a part G2 in the chuck device that grips the casing, making it possible to grip both the casing and the existing hat-shaped steel sheet pile. This allows the pile driving machine to reversally move without removing the casing from the chuck device.

[0008] On the other hand, if the sheet pile to be pressed in is, for example, a U-shaped steel sheet pile, then a U-shaped steel sheet pile does not have a flange portion like a hat-shaped steel sheet pile. Therefore, the way the sheet pile is gripped is different from that of a hat-shaped steel sheet pile, and a self-propelled retraction device designed for hat-shaped steel sheet piles cannot be directly applied to a U-shaped steel sheet pile.

[0009] Therefore, in order to propel a pile driving machine for U-shaped steel sheet piles backward, conventionally, a backward self-propulsion device 160, as shown in Figure 2, was attached to the lower end of the chuck device, and the pile driving machine was propelled backward.

[0010] However, in order to attach the reversing self-propelled device 160 shown in Figure 2 to the chuck device, it is necessary to remove the auger device that was used during the driving of U-shaped steel sheet piles from the pile driving machine. Therefore, time was required to remove the auger device between the completion of the driving of U-shaped steel sheet piles and the start of the pile driving machine's reversing self-propulsion.

[0011] In addition, removing the auger assembly from the pile driving machine requires the use of a large crane to lift the heavy auger assembly and securing storage space for the removed auger assembly. Therefore, depending on the surrounding environment of the construction site, it was sometimes difficult for the pile driving machine to move backward under its own power.

[0012] As described above, with conventional self-propelled reversing devices, depending on the type of sheet pile to be driven, it is not possible to grip both the casing and the existing sheet pile. Therefore, it is necessary to remove the auger device before starting the reversing movement. This can result in additional work time being required to remove the auger device between the completion of the pile driving work and the start of the pile driving machine's reversing movement, or in some cases, there may not be enough space to remove the auger device, making reversing movement itself difficult.

[0013] The present invention has been made in view of the above circumstances, and aims to provide a self-propelled reversing device and a self-propelled reversing method for a pile driving machine that can grip both the casing and the existing sheet pile (hereinafter referred to as "joint gripping"), regardless of the type of sheet pile to be driven in. [Means for solving the problem]

[0014] The present invention solves the above problems and is a pile driving machine that uses an auger device to drive sheet piles into the ground. Can be attached to the chuck device The reversing self-propelled device is characterized by comprising: a main body having an opening through which a cylindrical casing of the auger device can be inserted; a movable wall provided on the upper side of the main body and moving in a direction toward or toward the casing in order to grip the casing inserted through the opening; and a gripping portion provided on the lower side of the main body and gripping both the sheet pile and the casing inserted through the opening.

[0015] Another aspect of the present invention is a method for a pile driving machine that drives sheet piles using an auger device to move backward, comprising the steps of lowering the cylindrical casing of the auger device by a chuck device of the pile driving machine and inserting the casing through an opening formed in the main body of the backward self-propelled device, and providing on the upper side of the main body The reverse self-propelled device The steps include moving the movable wall toward the casing, and while the movable wall and the casing are in contact, gripping the casing together with the movable wall with the chuck device, and below the main body, the second sheet pile and the casing located in front of the first sheet pile which is gripped by the clamp of the pile driving machine. At the gripping portion of the aforementioned reversing self-propelled device The process of gripping together, and the aforementioned Gripping part With the second sheet pile and the casing both being gripped, the gripping state of the first sheet pile by the clamp is released, the saddle of the pile driving machine is raised, retracted and lowered in sequence, and the clamp grips the third sheet pile located behind the first sheet pile, and with the clamp gripping the third sheet pile, Gripping part The present invention is characterized by comprising the steps of releasing the gripping state of the second sheet pile and the casing by the chuck, raising the casing chuck portion of the chuck device to lift the casing, raising the retracting self-propelled device by raising the chuck portion of the chuck device, and retracting the leader mast of the pile driving machine. [Effects of the Invention]

[0016] According to the present invention, regardless of the type of sheet pile to be pressed in, the retractable self-propelled device can grip both the casing and the existing sheet pile. For example, even if the sheet pile to be pressed in is a U-shaped steel sheet pile, it is possible to grip both the U-shaped steel sheet pile and the casing, as shown by the dashed line in Figure 3. [Brief explanation of the drawing]

[0017] [Figure 1] This is a perspective view of a conventional self-propelled retraction device for hat-shaped steel sheet piles, and a schematic plan view showing the hat-shaped steel sheet pile and casing being gripped by a chuck device. [Figure 2] This figure shows an example of a conventional self-propelled reversing device for U-shaped steel sheet piles. [Figure 3] This figure shows an example of a self-propelled retraction device according to the present invention, and is a schematic plan view showing a state in which a U-shaped steel sheet pile and a casing are gripped together by the self-propelled retraction device. [Figure 4]It is a right side view showing a schematic configuration of a pile driver equipped with an auger device. [Figure 5] It is a perspective view showing a state where a reverse self - propelling device according to an embodiment of the present invention is attached to a chuck device. [Figure 6] It is a view of the state where the reverse self - propelling device is attached to the chuck device as seen from the front of the chuck device. [Figure 7] It is a longitudinal sectional view (a view corresponding to the A - A section of FIG. 5) of the state where the reverse self - propelling device is attached to the chuck device as seen from the front of the chuck device. [Figure 8] It is a perspective view excluding the chuck device from FIG. 5. [Figure 9] They are a plan view, a right side view, a front view, and a bottom view of the reverse self - propelling device. [Figure 10] It is a view of the state where the movable wall portion of the reverse self - propelling device contacts the casing as seen from above. [Figure 11] They are a right side view and a front view showing an example of the connection structure between the main body portion and the bracket. [Figure 12] They are a right side view and a front view (partially a sectional view) showing an example of the movable mechanism of the bracket. [Figure 13] It is a front view (partially a sectional view) showing an example of the movable mechanism of the bracket. [Figure 14] It is an enlarged perspective view of the connection portion between the chuck portion and the second wall portion of the reverse self - propelling device. [Figure 15] It is a right side view for explaining the schematic configuration of a conventional sheet pile conveying system. [Figure 16] It is a left side view showing an example of the conveying method of the reverse self - propelling device. [Figure 17] They are a right side view and a top view for explaining a jig for holding the conveying posture of the reverse self - propelling device. [Figure 18] It is a left side view showing an example of the conveying method of the reverse self - propelling device. [Figure 19] It is a right side view for explaining an example of the reverse self - propelling method of the pile driver.

Embodiments for Carrying Out the Invention

[0018] Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In this specification and the drawings, elements having substantially the same functional configuration are denoted by the same reference numerals, and redundant explanations will be omitted.

[0019] Figure 4 is a right side view showing the schematic configuration of the pile driving machine 1. In this specification and in the drawings, "front," "rear," "left," and "right" are defined based on the direction of travel of the pile driving machine 1 during driving work, with the direction in which the pile driving machine 1 moves during driving work being the front. Therefore, in Figure 4, the right side of the page is the front and the left side of the page is the rear. In addition, the left and right directions of the pile driving machine 1 are defined based on the direction of travel of the pile driving machine 1 as viewed from above, with the front of Figure 4 being the right side and the back of the page being the left side.

[0020] As shown in Figure 4, the pile driving machine 1 comprises an auger device 10 for excavating the ground and a pile driving machine body 20 to which the auger device 10 is attached. The piles driven by the pile driving machine 1 are sheet piles that can be driven in using the auger device 10, and sheet piles such as hat-shaped steel sheet piles, U-shaped steel sheet piles, and Z-shaped steel sheet piles are the piles to be driven. In the drawings referenced in the description of this embodiment, a U-shaped steel sheet pile is shown as an example.

[0021] The auger device 10 comprises an auger screw 11 for excavating the ground, a cylindrical (for example, substantially cylindrical) casing 12 surrounding the sides of the auger screw 11, and an auger drive unit 13 for rotating the auger screw 11.

[0022] The auger drive unit 13 is attached to the upper end of the casing 12. Inside the housing 13a of the auger drive unit 13, there is a hydraulic motor 14 that serves as the drive source for the auger screw 11, and a reduction gear 15 located below the hydraulic motor 14. A hydraulic hose 16 for the motor is connected to the hydraulic motor 14.

[0023] A replaceable auger head 17 is attached to the lower end of the auger screw 11, which protrudes downward from the lower end of the casing 12. The auger head 17 is equipped with an excavation bit (not shown) for crushing hard ground such as gravel layers containing boulders or bedrock. The casing 12 also has elongated discharge holes 18 for discharging excavated soil and stones, and multiple discharge holes 18 are provided at intervals along the longitudinal direction of the casing 12.

[0024] The pile driving machine body 20 has a saddle 22 to which multiple clamps 21 for gripping existing sheet piles P are attached, and a leader mast 24 configured to move back and forth relative to the saddle 22 by a sliding mechanism 23.

[0025] The leader mast 24 is connected to a total hydraulic hose 25 for performing hydraulic operations on each part. The leader mast 24 is also equipped with a hose reel 26 for winding and unwinding the motor hydraulic hose 16, and the hose reel 26 is fitted with a hose guide roller 27 that contacts the motor hydraulic hose 16. This hose reel 26 rotates as appropriate in conjunction with the raising and lowering movement of the auger device 10 during excavation work, applying tension to the motor hydraulic hose 16 during excavation work.

[0026] A chuck device 30 is provided at the front of the leader mast 24, configured to be able to move up and down relative to the leader mast 24. This chuck device 30 has a casing chuck portion 31 that grips the casing 12 of the auger device 10, and a chuck portion 32 provided below the casing chuck portion 31. The configuration of this chuck portion 32 will be described later, but the chuck portion 32 is configured to grip the casing 12 and the sheet pile P.

[0027] The general configuration of the pile driving machine 1 has been described above. The driving of sheet piles P using the auger device 10 is performed by this pile driving machine 1. Note that known methods can be applied to the specific driving method.

[0028] Then, for example, after the planned number of sheet piles P have been driven in, a reverse self-propulsion device is attached to the chuck device 30 in order to move the pile driving machine 1 backward. The reverse self-propulsion device according to this embodiment will be described below.

[0029] First, the mounting structure of the reversing self-propelled device to the chuck device 30 will be described. Figure 5 is a perspective view showing the reversing self-propelled device 40 mounted on the chuck device 30. Figure 6 is a view of the chuck device 30 with the reversing self-propelled device 40 mounted, seen from the front of the chuck device 30. Figure 7 is a longitudinal cross-sectional view (corresponding to cross-section AA in Figure 5) of the chuck device 30 with the reversing self-propelled device 40 mounted, seen from the front of the chuck device 30.

[0030] As described above, the chuck device 30 has a casing chuck section 31 and a chuck section 32. As shown in Figures 6 and 7, the chuck section 32 has a fixed jaw 32a and a movable jaw 32b. The movable jaw 32b is made of, for example, a hydraulic cylinder and is configured to extend and retract in the left-right direction. In other words, the movable jaw 32b is configured to move toward or away from the fixed jaw 32a.

[0031] During the press-in construction of the sheet pile P, the casing 12 and the sheet pile P are sandwiched between the fixed claws 32a and the movable claws 32b, gripping the casing 12 and the sheet pile P. However, when attaching the retractable self-propelled device 40 to the chuck device 30, the upper part of the casing 12 and the retractable self-propelled device 40 are sandwiched and gripped between the fixed claws 32a and the movable claws 32b. As a result, the retractable self-propelled device 40 is attached to the chuck device 30 by being gripped by the chuck portion 32.

[0032] Furthermore, the casing chuck section 31 shown in Figure 7 also has a fixed jaw 31a and a movable jaw 31b, similar to the chuck section 32, and is capable of gripping the casing 12 above the chuck section 32. Since the movable jaw 31b of the casing chuck section 31 operates independently of the movable jaw 32b of the chuck section 32, the gripping state of the casing 12 can be maintained by the casing chuck section 31 even if the gripping state of the casing 12 by the chuck section 32 is released. In addition, since the casing chuck section 31 is configured to be vertically movable relative to the chuck section 32, the casing 12 can be raised or lowered by the casing chuck section 31 without changing the height of the chuck section 32.

[0033] Next, the detailed structure of the reverse self-propelled device 40 will be explained, referring to Figures 5 to 7 mentioned above, as well as other drawings.

[0034] Figure 8 is a perspective view showing the schematic configuration of the reverse self-propelled device 40, and is a view of Figure 5 with the chuck device 30 removed. Figure 9 is a plan view (viewed from above), a right side view (viewed from the right side), a front view (viewed from the front), and a bottom view (viewed from below) of the reverse self-propelled device 40.

[0035] First, the reverse self-propelled device 40 has a main body portion 41 through which the casing 12 is inserted. The main body portion 41 has an opening 42 that penetrates from the top to the bottom of the main body portion 41. When viewed from above, the size of the opening 42 is larger than the outer diameter of the casing 12, and the casing 12 is inserted into this opening 42.

[0036] A bracket 50, which has a U-shape when viewed from above, is provided on the upper side of the main body 41. This bracket 50 has a first wall portion 51 and a pair of opposing second wall portions 52 and 53, and the pair of second wall portions 52 and 53 extend from the first wall portion 51 toward the side of the casing 12 which is inserted into the opening 42.

[0037] Furthermore, as shown in Figure 7, the first wall portion 51 is a wall portion located between the opening 42 and the movable claw 32b of the chuck portion 32 when the retractable self-propelled device 40 is attached to the chuck device 30. Therefore, as shown in Figures 8 and 9(a), the pair of second wall portions 52 and 53 are wall portions located in front of and behind the casing 12 that is inserted through the opening 42. These first wall portion 51 and the pair of second wall portions 52 and 53 surround three sides of the opening 42 formed in the main body portion 41.

[0038] As shown in Figure 10, the first wall portion 51 is a movable wall portion that can move when the movable claws 32b of the chuck portion 32 (Figure 6) make contact with it when the retractable self-propelled device 40 is gripped by the chuck portion 32. More specifically, when the movable claws 32b are extended, the first wall portion 51 is pushed by the movable claws 32b and approaches the opening 42, and makes contact with the casing 12 inserted through the opening 42. This allows the casing 12 to be gripped by being sandwiched between the first wall portion 51 and the fixed claws 32a.

[0039] On the other hand, when inserting the casing 12 into the opening 42, the first wall portion 51 is a movable wall portion, allowing the first wall portion 51 to be moved to a position away from the opening 42 (initial position). This makes it possible to avoid interference between the first wall portion 51 and the casing 12 when inserting the casing 12 into the opening 42, thus making it easier to insert the casing 12 into the opening 42.

[0040] In this embodiment, the casing 12 inserted through the opening 42 is gripped by being sandwiched between the first wall portion 51 and the fixing claws 32a (Figure 6) of the chuck portion 32. However, as long as the casing 12 inserted through the opening 42 can be gripped, the configuration for gripping the casing 12 on the upper side of the main body portion 41 is not limited to the above configuration.

[0041] Here, we will describe the connection structure between the bracket 50, which has a first wall portion 51 that is a movable wall portion, and the main body portion 41.

[0042] As shown in Figures 9(b) and 9(c), the upper surface of the main body 41 is provided with four connecting parts 43a to 43d that protrude upward. Each of these connecting parts 43a to 43d is a rectangular plate portion extending in a direction parallel to the second wall portions 52 and 53 of the bracket 50. Two connecting parts 43a and 43b are spaced apart behind the opening 42, and the remaining two connecting parts 43c and 43d are spaced apart in front of the opening 42.

[0043] Furthermore, each of the four connecting portions 43a to 43d has two elongated holes 44 formed at intervals. The direction of extension of the elongated holes 44 corresponds to the change in movement of the movable claws 32b of the chuck portion 32, or in other words, the direction of movement of the first wall portion 51.

[0044] Of the four connecting parts 43a to 43d described above, the lower end of one second wall part 52 is located between two connecting parts 43a and 43b, and the lower end of the other second wall part 53 is located between the remaining two connecting parts 43c and 43d. A circular through hole (not shown) is formed at the lower end of each of the second wall parts 52 and 53, and one second wall part 52 is connected to the connecting parts 43a and 43b via an elongated hole 44 with a pin 54. Similarly, the other second wall part 53 is connected to the connecting parts 43c and 43d via an elongated hole 44 with a pin 54. In this way, the main body 41 of the reversing self-propelled device 40 and the bracket 50 are connected.

[0045] Furthermore, since the pin 54 described above is movable within the elongated holes 44 of the connecting portions 43a to 43d, the bracket 50 can slide along the extending direction of the elongated holes 44. In other words, the bracket 50 has a mechanism that allows it to slide starting from the main body portion 41, thereby ensuring the movable function of the first wall portion 51. The pin 54 is an example of a connecting member for connecting the main body portion 41 and the bracket 50.

[0046] The connection structure between the main body 41 and the first wall 51 is not limited to the configuration using the elongated hole 44 and pin 54 described above, but may also be the configuration shown in Figure 11, for example. In the example shown in Figure 11, a rail mechanism 55 is used as the connection between the main body 41 and the second wall sections 52 and 53. This rail mechanism 55 allows the bracket 50 to slide relative to the main body 41.

[0047] Furthermore, with the movable mechanism of the first wall portion 51 described above, when returning the bracket 50 away from the opening 42 (the direction of contraction of the movable claw 32b), it may be done manually by, for example, a worker on site. However, a movable mechanism for automatic return may be adopted, for example, the configurations shown in Figures 12 and 13.

[0048] In the example shown in Figure 12, a spring mechanism 56 is provided, with one end of the spring 56a attached to a fixing member 56b and the other end attached to the inner surface of the first wall portion 51, such that the direction of expansion and contraction of the spring 56a coincides with the direction of movement of the first wall portion 51. When such a spring mechanism 56 is used, when the movable claw 32b (Figure 10) moves away from the opening 42, the elastic force of the spring 56a can automatically return the first wall portion 51 to its initial position.

[0049] The example shown in Figure 13 is one in which a cylinder mechanism 57 is used instead of the spring mechanism 56 shown in Figure 12. In this example, when the movable claw 32b (Figure 10) moves away from the opening 42, the cylinder mechanism 57 extends, which allows the first wall portion 51 to be automatically returned to its initial position.

[0050] Other examples of the configuration of the movable mechanism of the first wall portion 51 include a configuration that combines a known ball screw mechanism (not shown) with a motor, and a configuration that connects the movable claw 32b (Figure 10) with the first wall portion 51.

[0051] As described above, the movable mechanism of the first wall portion 51 is not particularly limited as long as it is configured to move in a direction toward or toward the casing 12 inserted through the opening 42. In other words, the first wall portion 51 only needs to be configured to move between a position in contact with the casing 12 inserted through the opening 42 and a position where it does not contact it.

[0052] Next, we will describe the components that are preferably provided on the second wall portions 52 and 53.

[0053] As shown in Figures 8, 9(b), and 9(c), it is preferable to provide a plate 58 at the upper end of each of the second wall portions 52 and 53 as a receiving portion for receiving the chuck device 30. By providing such a plate 58, when attaching the reversing self-propelled device 40 to the chuck device 30, the heavy chuck device 30 can be placed on the plate 58, making the attachment work of the reversing self-propelled device 40 easier.

[0054] Furthermore, it is preferable that the plate 58 be detachably attached to the second wall portions 52 and 53 by fasteners such as bolts. This allows for replacement with other plates of different sizes and shapes, and by appropriately replacing the plate with one suitable for chuck devices with different specifications, one reversing self-propelled device 40 can be used with other chuck devices with different specifications, thereby increasing the versatility of the reversing self-propelled device 40. Moreover, if the plate 58 is replaceable, it becomes easier to replace it with a new plate when wear progresses.

[0055] Furthermore, as shown in Figures 6, 8, 9(b), and 9(c), it is preferable to attach a pin bracket 59 as a pin mounting part to the end of the second wall portions 52 and 53 on the side of the fixing claw 32a, and to provide a fall prevention pin 60 for connecting the second wall portions 52 and 53 to the fixing claw 32a of the chuck portion 32. This fall prevention pin 60 is provided so as to be movable in a direction perpendicular to the second wall portions 52 and 53 (the front-rear direction of the chuck device 30). The fall prevention pin 60 is an example of a columnar member for connecting the second wall portions 52 and 53 to the chuck portion 32.

[0056] As shown in Figure 14, when a fall prevention pin 60 is provided, for example, an insertion opening 33 is formed in the fixed claw 32a of the chuck portion 32 through which the fall prevention pin 60 is inserted. The fall prevention pin 60 can be inserted into and removed from this insertion opening 33. In other words, the fall prevention pin 60 is provided so as to be easily inserted into and removed from the fixed claw 32a.

[0057] By providing such a fall prevention pin 60, a fall prevention function for the reversing self-propelled device 40 can be obtained. For example, if the movable claw 32b of the chuck portion 32 shown in Figure 6 is moved away from the fixed claw 32a, the reversing self-propelled device 40 may fall if the fall prevention pin 60 is not provided. On the other hand, if the fixed claw 32a and the second wall portions 52 and 53 are connected by the fall prevention pin 60, even if the gripping state of the chuck portion 32 is released, the fall prevention pin 60 fixed to the second wall portions 52 and 53 will catch on the fixed claw 32a, making it possible to prevent the reversing self-propelled device 40 from falling.

[0058] The insertion opening 33 for the fall prevention pin 60 may be formed in a location other than the fixed claw 32a of the chuck portion 32. Furthermore, the mechanism for preventing the retractable self-propelled device 40 from falling from the chuck device 30 should be considered as appropriate depending on the configuration of the chuck device 30, so it is not essential to provide a fall prevention mechanism using the fall prevention pin 60. However, by connecting the chuck portion 32 and the second wall portions 52 and 53 with the fall prevention pin 60, a fall prevention function can be obtained with a simple structure.

[0059] The bracket 50 of the reverse self-propelled device 40 has been described above. Next, the gripping portion 70 provided on the lower side of the main body 41 will be described.

[0060] As shown in Figures 9(b) to 9(d), a gripping portion 70 for gripping the sheet pile P and the casing 12 inserted through the opening 42 is provided on the lower side of the main body 41, and the gripping portion 70 has a fixed claw 70a and a movable claw 70b. This movable claw 70b is made of, for example, a hydraulic cylinder and is configured to extend and retract in the left and right directions. That is, the movable claw 70b is configured to move in a direction approaching or moving away from the fixed claw 70a, or in other words, to move in the direction of movement of the first wall portion 51.

[0061] With the gripping section 70 described above, both the casing 12 and the sheet pile P can be gripped between the fixed claw 70a and the movable claw 70b, so that when the pile driving machine 1 moves backward under its own power, both the casing 12 and the sheet pile P can be gripped together.

[0062] The general configuration of the reverse self-propelled device 40 according to this embodiment has been described above. Next, the transport method for transporting the reverse self-propelled device 40 to the pile driving machine 1 and the reverse self-propelled method for the pile driving machine 1 will be described in order.

[0063] First, during the construction of sheet piles P, it is known that the sheet piles P to be driven are transported to the pile driving machine 1 by the transport system shown in Figure 15. In the transport system illustrated in Figure 15, a crane 80, a power unit 81, and a transport device 82 are arranged in order behind the pile driving machine 1, and the crane 80, power unit 81, and transport device 82 are all configured to move in the front-rear direction on the upper end (top) of the existing sheet pile P (completed pile). The sheet pile P (pile to be driven) to be driven, transported by the transport device 82, is lifted by the crane 80, and the crane 80 rotates to set the sheet pile P in the pile driving machine 1. After that, the sheet pile P is driven in by the pile driving machine 1.

[0064] Subsequently, when it becomes necessary for the pile driving machine 1 to reverse and move under its own power, such as after the planned number of sheet piles P have been driven in, the reverse self-propelled device 40 is transported by, for example, the transport device 82, as shown in Figure 16. In the example shown in Figure 16, the reverse self-propelled device 40 is placed on a jig 90 for maintaining the transport posture of the reverse self-propelled device 40, and the jig 90 is placed on the transport platform 83 of the transport device 82, thereby transporting the reverse self-propelled device 40.

[0065] Figure 17 is a diagram illustrating the jig 90 described above. Figure 17(a) is a right side view of the jig 90 (the outer wall on the near side of the paper is not shown), and Figure 17(b) is a top view. The jig 90 has outer walls 91a to 91d that surround the reversing self-propelled device 40 on all four sides (front, back, left, and right). The reversing self-propelled device 40 is restrained by the contact of each outer wall 91a to 91d with the reversing self-propelled device 40. The jig 90 is also provided with restraint members 92a to 92c, etc., that restrain the legs of the reversing self-propelled device 40.

[0066] Figure 18 is a left side view showing another example of a method for transporting the reverse self-propelled device 40. In this example, the jig 90 is not placed on the transport platform 83, but the transport device 82 and the jig 90, which is positioned in front of the transport device 82, are connected by a connector 93, and the transport device 82 pushes the jig 90 on which the reverse self-propelled device 40 is placed. Although Figure 18 shows an example where the jig 90 is pushed by the transport device 82, the reverse self-propelled device 40 may also be transported by, for example, positioning the jig 90 behind the transport device 82 and towing the jig 90 with the transport device 82.

[0067] The reverse self-propelled device 40, transported by the transport method illustrated above, is lifted by the crane 80 (Figure 15), and in that state, the crane 80 rotates to move it in front of the pile driving machine 1. The subsequent reverse self-propelled method of the pile driving machine 1 is as follows.

[0068] First, as shown in Figure 19(a), the casing 12 and the chuck device 30 are raised in advance, and the retractable self-propelled device 40 is installed (temporarily placed) on the upper end of the second sheet pile P2, which is located in front of the first sheet pile P1 that is gripped by the clamp 21.

[0069] Next, as shown in Figure 19(b), the casing 12 and the chuck device 30 are lowered, and the casing 12 is inserted through the opening 42 (Figure 8) formed in the main body 41 of the reversing self-propelled device 40. At this point, the chuck 32 grips the reversing self-propelled device 40.

[0070] More specifically, the movable jaw 32b (Figure 10) of the chuck portion 32 is extended to press the first wall portion 51 of the bracket 50 with the movable jaw 32b, bringing the inner surface of the first wall portion 51 into contact with the casing 12. As a result, the casing 12 and the first wall portion 51 are sandwiched between the fixed jaw 32a (Figure 7) and the movable jaw 32b, allowing the casing 12 to be gripped together with the first wall portion 51.

[0071] Furthermore, as shown in Figure 7, in the gripping section 70 of the reversing self-propelled device 40, with the casing 12 inserted through the opening 42 and the existing sheet pile P adjacent to each other, the movable claw 70b of the gripping section 70 is brought closer to the fixed claw 70a. This allows the casing 12 and the existing sheet pile P to be gripped together.

[0072] The process of gripping the casing 12 with the chuck portion 32 and the process of gripping the casing 12 and the existing second sheet pile P2 with the gripping portion 70 may be performed either first or simultaneously.

[0073] Next, as shown in Figure 19(c), while maintaining the gripping state of the casing and the second sheet pile P2 by the retracting self-propelled device 40, the gripping state of the first sheet pile P1 by the clamp 21 is released, the saddle 22 is raised, and then the saddle 22 is retracted.

[0074] Next, as shown in Figure 19(d), the saddle 22 is lowered, and the clamp 21 grips the third sheet pile P3, which is located behind the first sheet pile P1 that was initially gripped by the pile driving machine 1.

[0075] Next, as shown in Figure 19(e), while maintaining the gripping state of the third sheet pile P3 by the clamp 21, the gripping state of the casing 12 and the second sheet pile P2 by the gripping portion 70 of the retracting self-propelled device 40 is released, and the casing 12 and the chuck device 30 are raised. More specifically, after releasing the gripping state of the casing 12 and the second sheet pile P2 by the gripping portion 70, the casing 12 is pulled up by raising the casing chuck portion 31, which is gripping the casing 12, relative to the chuck portion 32, and then the retracting self-propelled device 40 is raised by raising the chuck portion 32.

[0076] Then, as shown in Figure 19(f), the leader mast 24 is retracted, and the casing 12 and chuck device 30 are lowered. Through these operations, the pile driving machine 1 can be moved backward by the length of one sheet pile.

[0077] Subsequently, by repeatedly performing the series of operations shown in Figures 19(b) to 19(f), the pile driving machine 1 can be moved backward to the desired position.

[0078] As described above, the self-propelled reversing device 40 according to this embodiment allows for the joint gripping of the casing 12 and the existing sheet pile P, so the pile driving machine 1 can be moved backward without removing the auger device 10 from the chuck device 30.

[0079] In particular, the self-propelled reversing device 40 according to this embodiment makes it possible to grip both the casing 12 and the existing sheet pile P, regardless of the type of sheet pile to be driven. For example, the self-propelled reversing device 40 makes it possible to grip both a U-shaped steel sheet pile and the casing 12, which was not possible with conventional methods. That is, even when constructing a U-shaped steel sheet pile, the pile driving machine 1 can be driven backward without removing the auger device 10 from the chuck device 30.

[0080] In the example shown in Figure 19(a), the reverse self-propelled device 40 is temporarily placed on the second sheet pile P2, which is located one sheet pile in front of the first sheet pile P1. However, the reverse self-propelled device 40 may also be temporarily placed on a sheet pile located two or more sheets in front of the first sheet pile P1. When attaching the casing to the chuck device 30, it is sufficient for the chuck portion 32 to grip the casing together with the first wall portion 51 while the casing 12 is inserted through the opening 42. Therefore, the location where the reversing self-propelled device 40 is temporarily placed is not particularly limited, as long as this operation can be performed in that location.

[0081] Although an example of an embodiment of the present invention has been described above, the present invention is not limited to such example. It will be obvious to those skilled in the art that various modifications or alterations can be conceived within the scope of the technical idea described in the claims, and these will naturally also fall within the technical scope of the present invention.

[0082] For example, the constituent elements of the above embodiments can be combined in any way. From such any combination, the functions and effects of each constituent element in the combination will naturally be obtained, as well as other functions and effects that will be obvious to those skilled in the art from the description herein.

[0083] Furthermore, the effects described herein are merely descriptive or illustrative and not limiting. In other words, the technology relating to this disclosure may produce other effects that are obvious to those skilled in the art from the description herein, in addition to or instead of the effects described herein.

[0084] Furthermore, the following configuration examples also fall within the technical scope of this disclosure. (1) A self-propelled reversing device used in a pile driving machine that drives sheet piles using an auger device, The main body has an opening through which the cylindrical casing of the auger device can be inserted, A movable wall portion is provided on the upper side of the main body portion and moves in a direction approaching or moving away from the casing in order to grip the casing that is inserted through the opening, A self-propelled reversing device characterized by comprising a gripping portion provided on the lower side of the main body portion, which grips both the sheet pile and the casing inserted through the opening. (2) The reversing self-propelled device according to (1), characterized in that the movable wall portion has a mechanism that allows it to slide with respect to the main body portion. (3) On the upper side of the main body, The first wall portion, which is the movable wall portion, A pair of opposing second wall portions are provided, extending from the first wall portion toward the side of the casing that is inserted into the opening. The reverse self-propelled device according to (1) or (2), characterized in that the main body and the second wall are connected. (4) Having a connecting member that is inserted through the main body and the second wall and connects the main body and the second wall, The reverse self-propelled device according to (3), characterized in that the second wall portion is through which the connecting member can be inserted and has an elongated hole extending in the direction of movement of the first wall portion. (5) The self-propelled reversing device according to (3) or (4), characterized in that a columnar member is provided which connects the chuck device and the second wall portion by being inserted into an insertion opening formed in the chuck device of the pile driving machine. (6) A method for a pile driving machine that drives sheet piles using an auger device to move backward and self-propel, The process involves lowering the cylindrical casing of the auger device using the chuck device of the pile driving machine and inserting the casing into an opening formed in the main body of the reversing self-propelled device, The process involves moving the movable wall portion provided on the upper side of the main body portion toward the casing, and while the movable wall portion and the casing are in contact, gripping the casing together with the movable wall portion using the chuck device. The process involves gripping both the second sheet pile and the casing, which are located in front of the first sheet pile being gripped by the clamp of the pile driving machine, on the lower side of the main body, With the retracting self-propelled device gripping both the second sheet pile and the casing, the gripping state of the first sheet pile by the clamp is released, the saddle of the pile driving machine is raised, retracted, and lowered in sequence, and the clamp grips the third sheet pile located behind the first sheet pile. With the clamp gripping the third sheet pile, the retracting self-propelled device releases the gripping of the second sheet pile and the casing, the casing is lifted by raising the casing chuck portion of the chuck device, and then the retracting self-propelled device is raised by raising the chuck portion of the chuck device. A method for self-propelling a pile driving machine backward, comprising the step of retracting the leader mast of the pile driving machine. (7) A method for a pile driving machine to move backward according to (6), characterized in that, in the step of gripping the casing together with the movable wall portion with the chuck device, the movable wall portion is moved by pressing the movable wall portion with the movable claws provided by the chuck portion when moving the movable wall portion toward the casing. (8) On the upper side of the main body, The first wall portion, which is the movable wall portion, A pair of opposing second wall portions are provided, extending from the first wall portion toward the side of the casing that is inserted into the opening. A method for self-propelled reversing of a pile driving machine according to (6) or (7), characterized in that the main body and the second wall are connected. (9) The reverse self-propelled device has a connecting member that is inserted between the main body and the second wall and connects the main body and the second wall, The method for a pile driving machine to move backward according to (8), characterized in that the second wall portion has an elongated hole through which the connecting member can be inserted and which extends in the direction of movement of the first wall portion. (10) The method for a pile driving machine to move backward according to (8) or (9), characterized in that, in the step of gripping the reversing self-propelled machine with the chuck device, a columnar member for connecting the chuck device and the second wall portion is inserted into an insertion opening for the columnar member formed in the chuck device. [Industrial applicability]

[0085] This invention can be applied to a pile driving machine that uses an auger device for excavating the ground. [Explanation of symbols]

[0086] 1. Pile driving machine 10 Auger device 11 Auger Screw 12 Casing 13 Auger drive unit 13a Enclosure 14. Hydraulic motor 15 Reducer 16. Hydraulic hose for motor 17 Auger Head 18 Discharge hole 20. Pile driving machine body 21 Clamp 22 saddle 23. Sliding mechanism 24 Leader Must 25 Overall hydraulic hose 26 Hose Reels 27 Hose guide roller 30 Chuck device 31 Casing chuck section 31a Fixed claw 31b Movable claw 32. Chuck section 32a Fixed claw 32b Movable claw 33 Insertion port 40 Reverse self-propelled device 41 Main body 42 Opening 43a~43d Connecting part 44 Long hole 50 brackets 51 1st wall 52, 53 2nd wall part 54 pins 55 Rail mechanism 56 Spring mechanism 56a spring 56b Fixing member 57 Cylinder mechanism 58 Plates 59-pin bracket 60 Anti-drop pins 70 Gripping part 70a fixed claw 70b movable claw 80 Cranes 81 Power plant 82 Conveying device 83 Transport platform 90 jigs 91a~91d Exterior walls 92a~92c Restraining members 93 Connector 150 Conventional reverse self-propelled device 160 Conventional reverse self-propelled device P Sheet Pile

Claims

1. A self-propelled reversing device that can be attached to the chuck device of a pile driving machine that drives sheet piles using an auger device, The main body has an opening through which the cylindrical casing of the auger device can be inserted, A movable wall portion is provided on the upper side of the main body portion and moves in a direction approaching or moving away from the casing in order to grip the casing that is inserted through the opening, A self-propelled reversing device characterized by comprising a gripping portion provided on the lower side of the main body portion, which grips both the sheet pile and the casing inserted through the opening.

2. The reversing self-propelled device according to claim 1, characterized in that the movable wall portion has a mechanism that allows it to slide with respect to the main body portion.

3. On the upper side of the main body, The first wall portion, which is the movable wall portion, A pair of opposing second wall portions are provided, extending from the first wall portion toward the side of the casing that is inserted into the opening. The reverse self-propelled device according to claim 1 or 2, characterized in that the main body and the second wall are connected.

4. The system includes a connecting member that is inserted through the main body and the second wall and connects the main body and the second wall, The reverse self-propelled device according to claim 3, characterized in that the second wall portion is through which the connecting member can be inserted and has an elongated hole extending in the direction of movement of the first wall portion.

5. The self-propelled reversing device according to claim 3, characterized in that a columnar member is provided which connects the chuck device and the second wall portion by being inserted into an insertion opening formed in the chuck device of the pile driving machine.

6. A method for a pile driving machine that uses an auger device to drive sheet piles into the ground, and a method for a self-propelled pile driving machine to move backward, The process involves lowering the cylindrical casing of the auger device using the chuck device of the pile driving machine and inserting the casing into an opening formed in the main body of the reversing self-propelled device, The process involves moving the movable wall portion of the retractable self-propelled device, which is provided on the upper side of the main body, toward the casing, and while the movable wall portion and the casing are in contact, gripping the casing together with the movable wall portion using the chuck device. The process involves gripping the second sheet pile and the casing, located in front of the first sheet pile being gripped by the clamp of the pile driving machine, together with the gripping portion of the retracting self-propelled device, on the lower side of the main body, With the gripping portion gripping both the second sheet pile and the casing, the gripping state of the first sheet pile by the clamp is released, the saddle of the pile driving machine is raised, retracted, and lowered in sequence, and the clamp grips the third sheet pile located behind the first sheet pile. With the clamp gripping the third sheet pile, the gripping portion releases the gripping state of the second sheet pile and the casing, the casing is lifted by raising the casing chuck portion of the chuck device, and then the retractable self-propelled device is raised by raising the chuck portion of the chuck device. A method for self-propelling a pile driving machine backward, comprising the step of retracting the leader mast of the pile driving machine.

7. The self-propelled reversing method for a pile driving machine according to claim 6, characterized in that, in the step of gripping the casing together with the movable wall portion with the chuck device, the movable wall portion is moved by pressing the movable wall portion with the movable claws provided on the chuck portion when moving the movable wall portion toward the casing.

8. On the upper side of the main body, The first wall portion, which is the movable wall portion, A pair of opposing second wall portions are provided, extending from the first wall portion toward the side of the casing that is inserted into the opening. A method for self-propelled reversing of a pile driving machine according to claim 6 or 7, characterized in that the main body and the second wall are connected.

9. The reverse self-propelled device has a connecting member that is inserted through the main body and the second wall and connects the main body and the second wall. The method for self-propelled reversing of a pile driving machine according to claim 8, characterized in that the second wall portion is through which the connecting member can be inserted and has an elongated hole extending in the direction of movement of the first wall portion.

10. The method for a pile driving machine to move backward according to claim 8, characterized in that, in the step of gripping the reversing self-propelled device with the chuck device, a columnar member for connecting the chuck device and the second wall portion is inserted into an insertion opening for the columnar member formed in the chuck device.

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