JP2024025364A - Backward self-propelled device and pile press-in machine backward self-propelled method - Google Patents

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

The present invention relates to a self-propelled retracting device attached to a pile press-in machine and a self-propelled retracting method for the pile press-in machine.

When press-fitting sheet piles such as hat-shaped steel sheet piles and U-shaped steel sheet piles into hard ground such as gravel layers or bedrock containing boulders, a pile press-in machine equipped with an auger device may be used. As described in Patent Document 1, an auger device is a device having an auger screw for excavating the ground and a cylindrical casing surrounding the auger screw.

When press-fitting sheet piles using the auger device described above, the casing and auger screw are lowered while excavating the ground with the auger head at the lower end of the auger screw, and the sheet piles are also press-fitted together with this.

After press-fitting the planned number of sheet piles into the ground, the pile press-in machine positioned on the existing sheet piles may move backward. In order to perform the backward self-propelling of such a pile press-in machine, a backward self-propelled device is attached to the lower end of the chuck device that grips the sheet pile or casing. This self-propelled backward device is an attachment for providing a self-propelled backward function to the pile press-in machine. As a technology related to self-propelled backward movement of a pile press-in machine, Patent Document 2 discloses a self-propelled auxiliary device for a pile press-in/extraction machine.

JP2019-044445A Utility Model Publication No. 58-090236

As mentioned above, the self-propelled backward device is attached to a chuck device, and for example, a self-propelled backward device 150 as shown in FIG. 1(a) is attached to the lower end of the chuck device for hat-shaped steel sheet piles. It will be done. Note that FIG. 1(a) is a perspective view showing an example of a conventional self-propelled retracting device in a state gripping an existing hat-shaped steel sheet pile, and FIG. 1(b) is a perspective view of the self-propelled retracting device and chuck. FIG. 2 is a plan view schematically showing a state in which both a casing and an existing hat-shaped steel sheet pile are gripped by the device.

As shown by the two-dot chain line in Fig. 1(b), when a self-propelled retreating device for hat-shaped steel sheet piles is used, a portion _G1 that grips the flange of the hat-shaped steel sheet pile with the self-reversing self-propelled device, and a chuck There is a part _G2 that grips the casing with the device, and it is possible to grip both the casing and the existing hat-shaped steel sheet pile. Thereby, when the pile press-in machine is caused to move backward, the pile press-in machine can move backward without removing the casing from the chuck device.

On the other hand, when the sheet pile to be press-fitted is, for example, a U-shaped steel sheet pile, the U-shaped steel sheet pile does not have a flange portion like a hat-shaped steel sheet pile. For this reason, since the way of gripping the sheet pile is different from that for hat-shaped steel sheet piles, the self-retreating self-propelled device for hat-shaped steel sheet piles cannot be directly applied to U-shaped steel sheet piles.

Therefore, in order to make the pile press-in machine for U-shaped steel sheet piles move backward, a self-propelled backward drive device 160 as shown in FIG. 2 is conventionally attached to the lower end of the chuck device. was being carried out.

However, in order to attach the backward self-propelled device 160 shown in FIG. 2 to the chuck device, it is necessary to remove the auger device used during the press-in construction of the U-shaped steel sheet pile from the pile press-in machine. For this reason, a working time was required to remove the auger device from the completion of press-fitting the U-shaped steel sheet pile until the pile press-in machine starts moving backward.

In addition, the work of removing the auger device from the pile press-in machine requires the use of a large crane to lift the heavy auger device and the securing of storage space for the removed auger device. Therefore, depending on the surrounding environment of the construction site, it may be difficult for the pile press-in machine to move backward.

As mentioned above, with conventional self-propelled backward movement devices, depending on the type of sheet pile to be press-fitted, it is not possible to grasp both the casing and the existing sheet pile, so the auger device must be removed before starting self-propelled backward movement. In some cases, it may take time to remove the auger device after the completion of press-in construction until the pile press-in machine starts to move backward, or if there is insufficient space to remove the auger device, There were times when running itself became difficult.

The present invention was made in view of the above circumstances, and it is possible to grip both the casing and the existing sheet pile by sandwiching them (hereinafter referred to as "co-gripping") regardless of the type of sheet pile to be press-fitted. The purpose of the present invention is to provide a self-propelled backward self-propelled device and a self-propelled backward self-propelled method for a pile press-in machine.

The present invention, which solves the above problems, is a self-propelled retracting device used in a pile press-in machine that press-fits sheet piles using an auger device, in which an opening through which a cylindrical casing of the auger device can be inserted is formed. a movable wall portion that is provided on the upper side of the main body portion and moves toward or away from the casing in order to grasp the casing inserted into the opening; The present invention is characterized in that it includes a gripping part provided on the lower side and gripping both the sheet pile and the casing inserted through the opening.

The present invention according to another aspect is a self-propelled retreating method for a pile press-in machine that press-fits sheet piles using an auger device, in which the cylindrical casing of the auger device is lowered by a chuck device of the pile press-in machine, and the cylindrical casing of the auger device is moved backward. A step of inserting the casing into an opening formed in a main body of the self-propelled device, and moving a movable wall provided on the upper side of the main body toward the casing, and separating the movable wall and the casing. a step of gripping the casing together with the movable wall portion with the chuck device in a state in which the movable wall portion is in contact with the casing; a step of gripping the second sheet pile and the casing together, and releasing the gripping state of the first sheet pile by the clamp with the self-reversing device gripping the second sheet pile and the casing together, and press-fitting the pile. The saddle of the machine is raised, retreated, and lowered in order, and the clamp grips the third sheet pile located behind the first sheet pile. After releasing the gripping state of the second sheet pile and the casing by the moving device and lifting the casing by raising the casing chuck part of the chuck device, the retracting self is lifted by raising the chuck part of the chuck device. The present invention is characterized by comprising the steps of raising a running device, and retracting a leader mast of the pile press-in machine.

According to the present invention, regardless of the type of sheet pile to be press-fitted, the self-retracting self-propelled device can grip the casing and the existing sheet pile together. For example, even if the sheet pile to be press-fitted is a U-shaped steel sheet pile, the U-shaped steel sheet pile and the casing can be held together as shown by the two-dot chain line in FIG.

They are a perspective view of a conventional self-propelled backward device for hat-shaped steel sheet piles, and a plan view schematically showing a state in which the hat-shaped steel sheet piles and the casing are gripped by a chuck device. It is a figure showing an example of the conventional self-propelled retreat device for U-shaped steel sheet piles. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows an example of the self-propelled backward device concerning this invention, and is a top view which shows typically the state where the U-shaped steel sheet pile and the casing are gripped together by the self-propelled backward device. It is a right side view showing a schematic structure of a pile press-in machine provided with an auger device. 1 is a perspective view showing a state in which a self-propelled backward device according to an embodiment of the present invention is attached to a chuck device. FIG. 3 is a diagram showing a state in which the self-propelled backward device is attached to the chuck device, as seen from the front of the chuck device. FIG. 6 is a vertical cross-sectional view (corresponding to the AA section in FIG. 5) of the self-retracting self-propelled device attached to the chuck device as seen from the front of the chuck device. FIG. 6 is a perspective view of FIG. 5 with the chuck device removed. They are a plan view, a right side view, a front view, and a bottom view of the self-propelled reverse device. FIG. 3 is a view from above, showing a state in which the movable wall portion of the self-propelled backward device is in contact with the casing. It is a right view and a front view which show an example of the connection structure of a main body part and a bracket. FIG. 2 is a right side view and a front view (partially a sectional view) showing an example of a movable mechanism of the bracket. FIG. 3 is a front view (partially a sectional view) showing an example of a movable mechanism of the bracket. It is a perspective view which expanded the connection part of a chuck|zipper part and the 2nd wall part of a backward self-propelled device. It is a right side view for explaining the schematic structure of the conventional sheet pile conveyance system. It is a left side view showing an example of a transportation method of a self-propelled backward device. FIG. 2 is a right side view and a top view for explaining a jig that maintains the transport posture of the self-propelled backward device. It is a left side view showing an example of a transportation method of a self-propelled backward device. It is a right side view for explaining an example of the backward self-propelled method of the pile press-in machine.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. Note that in this specification and the drawings, elements having substantially the same functional configuration are designated by the same reference numerals and redundant explanation will be omitted.

FIG. 4 is a right side view showing a schematic configuration of the pile press-in machine 1. In addition, "front", "rear", "left", and "right" used in this specification and drawings are defined based on the direction of movement of the pile press-in machine 1 during press-in construction. The direction in which the pile press-in machine 1 moves is forward. Therefore, in FIG. 4, the right side of the paper is the front, and the left side of the paper is the rear. Further, the left and right direction of the pile press-in machine 1 is determined based on the traveling direction of the pile press-in machine 1 seen from above, and the front side of the paper in FIG. 4 is the right side, and the back side of the paper is the left side.

As shown in FIG. 4, the pile press-in machine 1 includes an auger device 10 for excavating the ground, and a pile press-in machine main body 20 to which the auger device 10 is attached. Note that the piles to be press-fitted by the pile press-in machine 1 are sheet piles that can be press-fitted together with the auger device 10, and for example, sheet piles such as hat-shaped steel sheet piles, U-shaped steel sheet piles, and Z-shaped steel sheet piles can be press-fitted. Becomes a stake. The drawings referred to in the description of this embodiment illustrate U-shaped steel sheet piles.

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

The auger drive unit 13 is attached to the upper end of the casing 12, and inside the casing 13a of the auger drive unit 13 are a hydraulic motor 14 that serves as a drive source for the auger screw 11, and a hydraulic motor 14 disposed below the hydraulic motor 14. A reduction gear 15 is provided. A motor hydraulic hose 16 is connected to the hydraulic motor 14 .

A replaceable auger head 17 is attached to the lower end of the auger screw 11 that protrudes downward from the lower end of the casing 12, and the auger head 17 is capable of crushing hard ground such as a gravel layer containing boulders or bedrock. A drilling bit (not shown) is provided. Further, the casing 12 is formed with elongated discharge holes 18 for discharging excavated earth, sand, stones, etc., and a plurality of discharge holes 18 are provided at intervals along the longitudinal direction of the casing 12. ing.

The pile press-in machine main body 20 has a saddle 22 to which a plurality of clamps 21 for gripping existing sheet piles P are attached, and a leader mast 24 configured to be movable back and forth with respect to the saddle 22 by a slide mechanism 23.

A general hydraulic hose 25 is connected to the leader mast 24 for hydraulically operating each part. Further, the leader mast 24 is provided with a hose reel 26 for winding up and discharging the motor hydraulic hose 16, and a hose guide roller 27 with which the motor hydraulic hose 16 comes into contact is attached to the hose reel 26. There is. The hose reel 26 rotates as appropriate as the auger device 10 moves up and down during the excavation work, and applies tension to the motor hydraulic hose 16 during the excavation work.

A chuck device 30 configured to be movable up and down relative to the leader mast 24 is provided at the front of the leader mast 24 . This chuck device 30 includes a casing chuck section 31 that grips the casing 12 of the auger device 10, and a chuck section 32 provided below the casing chuck section 31. The configuration of the chuck part 32 will be described later, but the chuck part 32 has a configuration for gripping the casing 12 and the sheet pile P.

The general configuration of the pile press-in machine 1 has been described above. Press-fitting of the sheet pile P using the auger device 10 is performed by such a pile press-fitting machine 1. Note that a known method can be applied as a specific press-fitting method.

For example, after the press-fitting of the planned number of sheet piles P is completed, a backward self-propelling device is attached to the chuck device 30 in order to make the pile press-in machine 1 self-propelled backward. The self-propelled reverse device according to this embodiment will be described below.

First, the attachment structure of the self-propelled backward device to the chuck device 30 will be described. FIG. 5 is a perspective view showing a state in which the self-propelled backward device 40 is attached to the chuck device 30. FIG. 6 is a view of the self-propelled backward device 40 attached to the chuck device 30, viewed from the front of the chuck device 30. FIG. 7 is a longitudinal cross-sectional view (corresponding to the AA section in FIG. 5) of the self-propelled backward device 40 attached to the chuck device 30, as seen from the front of the chuck device 30.

The chuck device 30 has the casing chuck part 31 and the chuck part 32 as described above, and as shown in FIGS. 6 and 7, the chuck part 32 has a fixed claw 32a and a movable claw 32b. have This movable claw 32b is made of, for example, a hydraulic cylinder, and is configured to be extendable and retractable in the left-right direction. In other words, the movable claw 32b is configured to be movable toward or away from the fixed claw 32a.

When press-fitting the sheet pile P, the casing 12 and the sheet pile P are sandwiched between the fixed claw 32a and the movable claw 32b, and the casing 12 and the sheet pile P are gripped. When attaching the self-propelled device 40, the casing 12 and the upper part of the self-propelled backward device 40 are held between the fixed claw 32a and the movable claw 32b. Therefore, the backward self-propelled device 40 is held by the chuck portion 32 and becomes attached to the chuck device 30 .

Note that the casing chuck section 31 shown in FIG. 7 also has a fixed claw 31a and a movable claw 31b like the chuck section 32, and can grip the casing 12 above the chuck section 32. be. The movable jaws 31b of the casing chuck part 31 operate independently of the movable jaws 32b of the chuck part 32, so even if the chuck part 32 is released from gripping the casing 12, the casing chuck part 31 can hold the casing 12. The grip state can be maintained. In addition, since the casing chuck part 31 is configured to be able to rise and fall relative to the chuck part 32, the casing 12 can be raised or lowered by the casing chuck part 31 without changing the height of the chuck part 32. can.

Next, the detailed structure of the self-propelled reverse device 40 will be explained with reference to other drawings in addition to the above-mentioned FIGS. 5 to 7.

FIG. 8 is a perspective view showing a schematic configuration of the self-propelled backward device 40, and is a diagram from FIG. 5 with the chuck device 30 removed. FIG. 9 shows a plan view (view from above), a right side view (view from the right side), a front view (view from the front), and a bottom view (view from the bottom) of the self-propelled reverse device 40. ).

First, the self-propelled backward device 40 has a main body portion 41 into which the casing 12 is inserted. An opening 42 is formed in the main body 41 and extends through the main body 41 from above to below. The size of the opening 42 when viewed from above is larger than the outer shape of the casing 12, and the casing 12 is inserted into the opening 42.

A bracket 50 having a U-shape when viewed from above is provided on the upper side of the main body portion 41 . This bracket 50 has a first wall portion 51 and a pair of second wall portions 52 and 53 facing each other. It extends toward the side of the casing 12 that is inserted into the casing 12 .

Further, as shown in FIG. 7, the first wall portion 51 is a wall portion located between the opening portion 42 and the movable claw 32b of the chuck portion 32 when the self-propelled backward device 40 is attached to the chuck device 30. It is. Therefore, as shown in FIGS. 8 and 9(a), the pair of second walls 52 and 53 are walls located at the front and rear of the casing 12 that are inserted into the opening 42. The first wall 51 and the pair of second walls 52 and 53 surround the opening 42 formed in the main body 41 on three sides.

As shown in FIG. 10, the first wall portion 51 is a movable wall that can be moved by contacting the movable claw 32b of the chuck portion 32 when the self-propelled backward device 40 is gripped by the chuck portion 32 (FIG. 6). Department. Specifically, when the movable claw 32b extends, the first wall portion 51 is pushed by the movable claw 32b, approaches the opening 42, and comes into contact with the casing 12 inserted through the opening 42. Thereby, the casing 12 can be held between the first wall portion 51 and the fixed claw 32a.

On the other hand, at the stage of inserting the casing 12 into the opening 42, the first wall 51 is moved to a position away from the opening 42 (initial position) because the first wall 51 is a movable wall. be able to. 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, making it easier to insert the casing 12 into the opening 42. becomes.

In this embodiment, the casing 12 inserted through the opening 42 is held between the first wall 51 and the fixed claw 32a (FIG. 6) of the chuck section 32, but the opening The structure of holding the casing 12 above the main body part 41 is not limited to the above-mentioned structure, as long as the casing 12 inserted through the part 42 can be held.

Here, a connection structure between the bracket 50 having the first wall portion 51, which is a movable wall portion, and the main body portion 41 will be described.

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

Furthermore, two elongated holes 44 are formed at intervals in each of the four connecting portions 43a to 43d. The extending direction of the elongated hole 44 corresponds to the movement change of the movable claw 32b of the chuck portion 32, or in other words, the direction in which the first wall portion 51 moves.

Among the four connecting parts 43a to 43d as 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 two connecting parts 43c and 43d is located between two connecting parts 43a and 43b. The lower end of the other second wall portion 53 is located between them. A circular through hole (not shown) is formed in the lower end of each of the second wall parts 52 and 53, and one of the second wall parts 52 and the connecting parts 43a and 43b are connected to each other through the elongated hole 44. and are connected by a pin 54. Similarly, the other second wall portion 53 and the connecting portions 43c and 43d are connected with a pin 54 via a long hole 44. Thereby, the main body portion 41 of the self-propelled backward device 40 and the bracket 50 are connected.

Further, since the pin 54 described above is movable within the elongated hole 44 of the connecting portions 43a to 43d, the bracket 50 is slidable along the extending direction of the elongated hole 44. That is, the bracket 50 has a mechanism that can be slid from the main body part 41 as a starting point, thereby ensuring the movable function of the first wall part 51. Note that the pin 54 is an example of a connecting member for connecting the main body portion 41 and the bracket 50.

Note that the connection structure between the main body portion 41 and the first wall portion 51 is not limited to the structure using the elongated hole 44 and the pin 54 described above, and may be the structure shown in FIG. 11, for example. In the example shown in FIG. 11, a rail mechanism 55 is employed as a connecting portion between the main body portion 41 and the second wall portions 52 and 53. This rail mechanism 55 allows the bracket 50 to slide relative to the main body 41.

Further, according to the movable mechanism of the first wall portion 51 described above, when the bracket 50 is returned in the direction away from the opening 42 (the direction in which the movable claw 32b contracts), the on-site worker, for example, manually returns the bracket 50. Although this may be the case, the configuration shown in FIGS. 12 and 13, for example, may be adopted as a movable mechanism for automatically returning the position.

In the example shown in FIG. 12, a spring mechanism 56 is provided, and one end of the spring 56a is connected to the fixed member 56b, and the other end is It is attached to the inner surface of the first wall portion 51. When such a spring mechanism 56 is used, when the movable claw 32b (FIG. 10) moves in a direction away from the opening 42, the elastic force of the spring 56a automatically returns the first wall portion 51 to the initial position. can be returned to.

The example shown in FIG. 13 is an example in which a cylinder mechanism 57 is used in place of the spring mechanism 56 shown in FIG. In this example, when the movable claw 32b (FIG. 10) moves away from the opening 42, the first wall 51 can be automatically returned to the initial position by extending the cylinder mechanism 57. can.

In addition, other configuration examples of the movable mechanism of the first wall portion 51 include a configuration in which a known ball screw mechanism (not shown) and a motor are combined, and a configuration in which the movable claw 32b (FIG. 10) and the first wall portion 51 are combined. There are configurations that connect.

As described above, the movable mechanism of the first wall portion 51 is not particularly limited as long as it is configured to be movable toward or away from the casing 12 inserted through the opening 42. In other words, the first wall portion 51 may be configured to be movable between a position in which it contacts the casing 12 inserted through the opening 42 and a position in which it does not contact the casing 12 .

Next, parts that are preferably provided on the second wall portions 52 and 53 will be explained.

As shown in FIGS. 8, 9(b) and 9(c), a plate 58 may be provided at the upper end of each of the second walls 52, 53 as a receiving portion for receiving the chuck device 30. is preferred. By providing such a plate 58, when attaching the self-propelled backward device 40 to the chuck device 30, the heavy chuck device 30 can be placed on the plate 58, and the work of attaching the self-propelled backward device 40 is facilitated. become.

Further, it is preferable that the plate 58 is detachably attached to the second wall portions 52 and 53 using fasteners such as bolts. As a result, it is possible to replace the plate with another plate having a different size and shape, so by appropriately replacing the plate with a plate suitable for a chuck device with different specifications, one self-retracting self-propelled device 40 can be used with another chuck device with different specifications. It is also possible to use the self-propelled reversing device 40 in other devices, and the versatility of the self-propelled reverse device 40 can be increased. Furthermore, if the plate 58 is replaceable, when the plate 58 wears out, it can be easily replaced with a new plate.

Further, as shown in FIGS. 6, 8, 9(b) and 9(c), at the end of the second wall portions 52, 53 on the fixed claw 32a side, a pin bracket as a pin mounting portion is provided. It is preferable to install a fall prevention pin 60 for connecting the second wall parts 52, 53 and the fixing claw 32a of the chuck part 32. This fall prevention pin 60 is provided so as to be movable in a direction perpendicular to the second walls 52 and 53 (in the front-rear direction of the chuck device 30). Note that the fall prevention pin 60 is an example of a columnar member for connecting the second wall portions 52 and 53 and the chuck portion 32.

As shown in FIG. 14, when the fall prevention pin 60 is provided, an insertion opening 33 through which the fall prevention pin 60 is inserted is formed, for example, in the fixed claw 32a of the chuck portion 32. The fall prevention pin 60 can be inserted into or pulled out of the insertion opening 33. That is, the fall prevention pin 60 is provided so as to be freely inserted into and removed from the fixed claw 32a.

By providing such a fall prevention pin 60, a fall prevention function of the backward self-propelled device 40 can be obtained. For example, when the movable claw 32b of the chuck portion 32 shown in FIG. 6 is moved in the direction away from the fixed claw 32a, the self-propelled backward 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 parts 52, 53 are connected by the fall prevention pin 60, even if the gripping state of the chuck part 32 is released, the falling part fixed to the second wall parts 52, 53 Since the prevention pin 60 is caught by the fixed claw 32a, it is possible to prevent the self-propelled backward device 40 from falling.

Note that the insertion opening 33 of the fall prevention pin 60 may be formed in a portion other than the fixing claw 32a of the chuck portion 32. Furthermore, since the mechanism for preventing the self-propelled backward device 40 from falling from the chuck device 30 is a matter that should be appropriately considered depending on the configuration of the chuck device 30, it is not possible to provide a fall prevention mechanism using the fall prevention pin 60. Not required. However, according to the configuration in which the chuck part 32 and the second wall parts 52 and 53 are connected by the fall prevention pin 60, the fall prevention function can be obtained with a simple structure.

The bracket 50 of the self-propelled reverse device 40 has been described above. Next, the grip section 70 provided on the lower side of the main body section 41 will be explained.

As shown in FIGS. 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 portion 41. The 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 be expandable and retractable in the left-right direction. That is, the movable claw 70b is configured to be movable in the direction toward or away from the fixed claw 70a, in other words, the movable claw 70b is configured to be movable in the direction in which the first wall portion 51 moves.

According to the gripping section 70, both the casing 12 and the sheet pile P can be gripped between the fixed claw 70a and the movable claw 70b, so when the pile press-in machine 1 moves backward, the casing 12 and It becomes possible to grab the sheet piles P together.

The schematic configuration of the self-propelled reverse device 40 according to the present embodiment has been described above. Next, a transport method for transporting the backward self-propelled device 40 to the pile press-in machine 1 and a backward self-propelled method of the pile press-in machine 1 will be explained in order.

First, when press-fitting a sheet pile P, it is known that the sheet pile P to be press-fitted is conveyed to the pile press-in machine 1 by a conveyance system shown in FIG. In the conveyance system illustrated in FIG. 15, a crane 80, a power device 81, and a conveyance device 82 are arranged in this order behind the pile press-in machine 1, and the crane 80, power device 81, and conveyance device 82 are all connected to the existing sheet pile P ( The upper end (top end) of the completed pile is configured to be movable in the front-back direction. Then, the sheet pile P to be press-fitted (press-fit pile) transported by the transport device 82 is lifted by a crane 80, and the crane 80 rotates to set the sheet pile P in the pile press-fit machine 1. Thereafter, the pile press-in machine 1 press-fits the sheet pile P.

Thereafter, when the pile press-in machine 1 needs to move backward, for example after the planned number of sheet piles P have been press-fitted, as shown in FIG. Transport takes place. In the example shown in FIG. 16, the self-propelled backward device 40 is placed on a jig 90 for maintaining the transport posture of the self-propelled backward device 40, and the jig 90 is placed on the conveying table 83 of the conveying device 82. , the self-propelled backward device 40 is being transported.

17 is a diagram for explaining the jig 90, and FIG. 17(a) is a right side view of the jig 90 (the outer wall on the front side of the paper is omitted), FIG. 17(b) is a right side view of the jig 90, and FIG. ) is a top view. The jig 90 has outer walls 91a to 91d for surrounding the four sides (front, rear, left, and right) of the self-propelled backward device 40, and when each of the outer walls 91a to 91d comes into contact with the self-propelled backward device 40, the self-propelled backward device 40 is closed. 40 are in custody. Furthermore, the jig 90 is also provided with restraining members 92a to 92c, etc., which restrain the legs of the self-propelled backward device 40.

FIG. 18 is a left side view showing another example of the transportation method of the self-propelled backward device 40. In this example, the jig 90 is not placed on the conveyor table 83, but the conveyor device 82 and the jig 90 placed in front of the conveyor device 82 are connected by a connecting tool 93, and the backward self-propelled device 40 is placed on the conveyor table 83. The conveyor device 82 is pushing the jig 90 that has been moved. Note that although FIG. 18 shows an example in which the jig 90 is pushed by the conveyance device 82, for example, the jig 90 is placed behind the conveyance device 82, and the jig 90 is pulled by the conveyance device 82 to be pushed backward. The self-propelled device 40 may be transported.

The self-propelled retracting device 40 transported by the transport method exemplified above is lifted by a crane 80 (FIG. 15), and in this state, the crane 80 rotates to move to the front of the pile press-in machine 1. The subsequent self-propelling method of the pile press-in machine 1 is as follows.

First, as shown in FIG. 19(a), the casing 12 and the chuck device 30 are raised in advance, and the second sheet pile P ₂ is placed in front of the first sheet pile P ₁ held by the clamp 21. A self-propelled backward device 40 is installed (temporarily placed) at the upper end of the vehicle.

Subsequently, as shown in FIG. 19(b), the casing 12 and the chuck device 30 are lowered, and the casing 12 is inserted into the opening 42 (FIG. 8) formed in the main body portion 41 of the self-propelled backward device 40. Here, the self-propelled backward device 40 is gripped by the chuck portion 32 .

To be more specific, the movable claw 32b (FIG. 10) of the chuck portion 32 is extended, and the first wall portion 51 of the bracket 50 is pushed by the movable claw 32b, thereby 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 held between the fixed claw 32a (FIG. 7) and the movable claw 32b, and the casing 12 can be gripped together with the first wall portion 51.

In addition, as shown in FIG. 7, in the gripping part 70 of the self-propelled backward device 40, the movable claw 70b of the gripping part 70 is held in a state where the casing 12 inserted into the opening 42 and the existing sheet pile P are adjacent to each other. The fixed claw 70a is brought close to the fixed claw 70a. As a result, the casing 12 and the existing sheet pile P are grasped together.

In addition, the gripping process of the casing 12 by the chuck part 32 and the gripping process of the casing 12 and the existing second sheet pile P ₂ by the gripping part 70 may be performed first, or may be performed simultaneously. .

Next, as shown in FIG. 19(c), while maintaining the grip state of the casing and the second sheet pile P ₂ by the backward self-propelled device 40, the grip state of the first sheet pile P ₁ by the clamp 21 is released, and the saddle After raising the saddle 22, the saddle 22 is moved back.

Next, as shown in FIG. 19(d), the saddle 22 is lowered, and the clamp 21 grips the third sheet pile P ₃ located behind the first sheet pile P ₁ that was initially gripped by the pile press-in machine 1. .

Next, as shown in FIG. 19(e), while maintaining the gripping state of the third sheet pile P ₃ by the clamp 21, the gripping state of the casing 12 and the second sheet pile P ₂ by the gripping part 70 of the self-propelled backward device 40. is released, and the casing 12 and chuck device 30 are raised. Specifically, after releasing the gripping state of the casing 12 and the second sheet pile P ₂ by the gripping part 70, the casing chuck part 31 gripping the casing 12 is raised relative to the chuck part 32 to pull up the casing 12, and then By raising the chuck part 32, the backward self-propelled device 40 is raised.

Then, as shown in FIG. 19(f), after the leader mast 24 is retreated, the casing 12 and the chuck device 30 are lowered. By the above operation, the pile press-in machine 1 can be self-propelled backward by one sheet pile.

Thereafter, by repeating the series of operations shown in FIGS. 19(b) to 19(f), the pile press-in machine 1 can be self-propelled backward to a desired position.

As explained above, according to the self-propelled backward device 40 according to the present embodiment, the casing 12 and the existing sheet pile P can be gripped together, so the pile press-fits without removing the auger device 10 from the chuck device 30. Machine 1 can be self-propelled backwards.

In particular, according to the self-propelled backward device 40 according to this embodiment, the casing 12 and the existing sheet pile P can be gripped together regardless of the type of sheet pile to be press-fitted. For example, according to the self-propelled backward device 40, it is also possible to grasp the U-shaped steel sheet pile and the casing 12 together, which has not been possible in the past. That is, even during construction of U-shaped steel sheet piles, the pile press-in machine 1 can be driven backwards without removing the auger device 10 from the chuck device 30.

In addition, in the example shown in FIG. 19(a) _, the self-propelled backward device 40 is temporarily placed on the second sheet pile _P2 located one sheet ahead of the first sheet pile _P1 ; The self-propelled retreat device 40 may be temporarily placed on two or more sheet piles located in front. In addition, the reverse self-propelled device 40
When attaching the casing to the chuck device 30, it is sufficient to be able to grip the casing along with the first wall portion 51 with the chuck portion 32 while the casing 12 is inserted through the opening portion 42, so it is possible to attach the casing to the chuck device 30 at any location where this work can be done. For example, the place where the self-propelled reverse device 40 is temporarily placed is not particularly limited.

Although an example of the embodiment of the present invention has been described above, the present invention is not limited to this example. It is clear that those skilled in the art can come up with various changes or modifications within the scope of the technical idea described in the claims, and these naturally fall within the technical scope of the present invention. It is understood that it belongs to

For example, the constituent features of the above embodiments can be combined arbitrarily. This arbitrary combination naturally provides the effects and effects of the respective constituent elements of the combination, as well as other effects and effects that will be apparent to those skilled in the art from the description of this specification.

Further, the effects described in this specification are merely explanatory or illustrative, and are not limiting. In other words, the technology according to the present disclosure may have other effects that are obvious to those skilled in the art from the description of this specification, in addition to or in place of the above effects.

Note that the following configuration examples also belong to the technical scope of the present disclosure.
(1) A self-propelled retracting device used in a pile press-in machine that press-fits sheet piles using an auger device,
a main body portion formed with an opening through which the cylindrical casing of the auger device can be inserted;
a movable wall portion provided above the main body portion and movable in a direction toward or away from the casing in order to grip the casing inserted into the opening;
A self-propelled backward self-propelled device, comprising: a gripping portion provided below the main body portion and gripping both the sheet pile and a casing inserted through the opening.
(2) The self-propelled backward self-propelled device according to (1), wherein the movable wall portion has a mechanism capable of sliding movement from the main body portion as a starting point.
(3) On the upper side of the main body,
a first wall portion that is the movable wall portion;
a pair of second walls facing each other extending from the first wall toward the sides of the casing inserted into the opening; the main body and the second wall are connected; The self-propelled reversing device according to (1) or (2), characterized in that:
(4) having a connecting member inserted through the main body and the second wall to connect the main body and the second wall;
The self-propelled backward self-propelled device according to (3), wherein the second wall has an elongated hole through which the connecting member can be inserted and which extends in the movable direction of the first wall. .
(5) A columnar member is provided that connects the chuck device and the second wall portion by being inserted into an insertion hole formed in the chuck device of the pile press-in machine. ) or the reverse self-propelled device described in (4).
(6) A backward self-propelled method for a pile press-in machine that press-fits sheet piles using an auger device,
lowering the cylindrical casing of the auger device using a chuck device of the pile press-in machine, and inserting the casing into an opening formed in a main body of the self-propelled retracting device;
a step of moving a movable wall provided on the upper side of the main body toward the casing, and holding the casing together with the movable wall with the chuck device in a state where the movable wall and the casing are in contact with each other; and,
A step of grasping both the second sheet pile located in front of the first sheet pile held by the clamp of the pile press-in machine and the casing on the lower side of the main body;
While the second sheet pile and the casing are both gripped by the self-propelled retracting device, the grip of the first sheet pile by the clamp is released, and the saddle of the pile press-in machine is raised, retreated, and lowered in order, a step of grasping a third sheet pile located behind the first sheet pile with the clamp;
While the third sheet pile was gripped by the clamp, the gripping state of the second sheet pile and the casing by the self-retracting self-propelled device was released, and the casing was pulled up by raising the casing chuck part of the chuck device. Later, raising the retracting self-propelled device by raising the chuck part of the chuck device;
A self-propelled backward self-propelling method for a pile press-in machine, comprising the step of retreating a leader mast of the pile press-in machine.
(7) In the step of gripping the casing together with the movable wall portion by the chuck device, when moving the movable wall portion toward the casing, the movable wall portion is pressed by a movable claw provided on the chuck portion. The self-retracting method for a pile press-in machine according to (6), characterized in that the movable wall portion is moved by:
(8) On the upper side of the main body,
a first wall portion that is the movable wall portion;
a pair of second walls facing each other extending from the first wall toward the sides of the casing inserted into the opening; the main body and the second wall are connected; The self-retracting method for a pile press-in machine according to (6) or (7), characterized in that:
(9) The backward self-propelled device includes a connecting member that is inserted through the main body and the second wall to connect the main body and the second wall,
The pile press-in machine according to (8), wherein the second wall portion has a long hole through which the connecting member can be inserted and extends in the movable direction of the first wall portion. Reverse self-propelled method.
(10) In the step of gripping the backward self-propelled device with the chuck device, a columnar member for connecting the chuck device and the second wall portion is inserted into the columnar member formed in the chuck device. The self-retracting method for a pile press-in machine according to (8) or (9), characterized in that the pile press-in machine is inserted into an opening.

The present invention can be applied to a pile press-in machine using an auger device for excavating the ground.

1 Pile press-in machine 10 Auger device 11 Auger screw 12 Casing 13 Auger drive unit 13a Housing 14 Hydraulic motor 15 Reducer 16 Motor hydraulic hose 17 Auger head 18 Discharge hole 20 Pile press-in machine body 21 Clamp 22 Saddle 23 Slide mechanism 24 Leader Mast 25 General hydraulic hose 26 Hose reel 27 Hose guide roller 30 Chuck device 31 Casing chuck part 31a Fixed claw 31b Movable claw 32 Chuck part 32a Fixed claw 32b Movable claw 33 Insertion port 40 Reverse self-propelled device 41 Main body part 42 Opening part 43a~ 43d Connecting portion 44 Elongated hole 50 Bracket 51 First wall portions 52, 53 Second wall portion 54 Pin 55 Rail mechanism 56 Spring mechanism 56a Spring 56b Fixing member 57 Cylinder mechanism 58 Plate 59 Pin bracket 60 Fall prevention pin 70 Gripping portion 70a Fixed claw 70b Movable claw 80 Crane 81 Power device 82 Transport device 83 Transport platform 90 Jigs 91a to 91d Outer walls 92a to 92c Restraint member 93 Connector 150 Conventional self-propelled backward device 160 Conventional self-propelled backward device P Sheet pile

Claims (10)

A backward self-propelled device used in a pile press-in machine that press-fits sheet piles using an auger device,
a main body portion formed with an opening through which the cylindrical casing of the auger device can be inserted;
a movable wall portion provided above the main body portion and movable in a direction toward or away from the casing in order to grip the casing inserted into the opening;
A self-propelled backward self-propelled device, comprising: a gripping portion provided below the main body portion and gripping both the sheet pile and a casing inserted through the opening. The self-propelled backward self-propelled device according to claim 1, wherein the movable wall portion has a mechanism capable of sliding movement starting from the main body portion. On the upper side of the main body,
a first wall portion that is the movable wall portion;
a pair of second walls facing each other extending from the first wall toward the sides of the casing inserted into the opening; the main body and the second wall are connected; The self-propelled reversing device according to claim 1 or 2, characterized in that: a connecting member inserted through the main body and the second wall to connect the main body and the second wall;
The self-propelled backward self-propelled device according to claim 3, wherein the second wall has a long hole through which the connecting member can be inserted and which extends in the movable direction of the first wall. . According to claim 3, further comprising a columnar member that connects the chuck device and the second wall portion by being inserted into an insertion hole formed in the chuck device of the pile press-in machine. Reverse self-propelled device. A self-propelled backward self-propelling method for a pile press-in machine that press-fits sheet piles using an auger device,
lowering the cylindrical casing of the auger device using a chuck device of the pile press-in machine, and inserting the casing into an opening formed in a main body of the self-propelled retracting device;
a step of moving a movable wall provided on the upper side of the main body toward the casing, and holding the casing together with the movable wall with the chuck device in a state where the movable wall and the casing are in contact with each other; and,
A step of grasping both the second sheet pile located in front of the first sheet pile held by the clamp of the pile press-in machine and the casing on the lower side of the main body;
While the second sheet pile and the casing are both gripped by the self-propelled retracting device, the grip of the first sheet pile by the clamp is released, and the saddle of the pile press-in machine is raised, retreated, and lowered in order, a step of grasping a third sheet pile located behind the first sheet pile with the clamp;
With the third sheet pile being gripped by the clamp, the gripping state of the second sheet pile and the casing by the self-retracting self-propelled device was released, and the casing was pulled up by raising the casing chuck part of the chuck device. Later, raising the retracting self-propelled device by raising the chuck part of the chuck device;
A self-propelled backward self-propelling method for a pile press-in machine, comprising the step of retracting a leader mast of the pile press-in machine. In the step of gripping the casing together with the movable wall portion by the chuck device, when moving the movable wall portion toward the casing, the movable wall portion is pressed by a movable claw provided on the chuck portion. 7. The self-retracting method for a pile press-in machine according to claim 6, further comprising moving a movable wall portion. On the upper side of the main body,
a first wall portion that is the movable wall portion;
a pair of second walls facing each other extending from the first wall toward the sides of the casing inserted into the opening; the main body and the second wall are connected; 8. The method for self-propelled backward movement of a pile press-in machine according to claim 6 or 7. The backward self-propelled device includes a connecting member that is inserted through the main body and the second wall to connect the main body and the second wall,
9. The pile press-in machine according to claim 8, wherein the second wall has a long hole through which the connecting member can be inserted and extends in the movable direction of the first wall. Reverse self-propelled method. In the step of gripping the backward 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 hole for the columnar member formed in the chuck device. 9. The self-retracting method for a pile press-in machine according to claim 8.

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