JP2008184815A - Pile driver - Google Patents

Abstract

An object of the present invention is to provide a pile driver that does not require special parts and can simplify the structure.
According to a pile driving machine, external force support portions (61b, 62b) of a connecting portion (60) are locked to a locking portion, so that a load caused by a rotational driving reaction force of an auger disposed in a reader (20) is received. Since the load is not applied to the connecting portion 60 that can be supported by the locking portion and intended to swing the support frame 40, the connecting portion 60 can be prevented from being damaged. In addition, since the external force support portions 61b and 62b are formed using the connecting portion 60, a dedicated part is not required, and the structure can be simplified.
[Selection] Figure 3

Description

  The present invention relates to a pile driving machine, and more particularly to a pile driving machine that does not require special parts and can simplify the structure.

  A pile driver is a construction machine for performing a pile driving operation, and generally includes a vehicle body, a leader standing on the vehicle body, and an auger disposed on the leader. For example, Patent Document 1 supports a reader support frame that is disposed on a vehicle body and supports the reader, a rotation support portion that is connected to the vehicle body so that the reader support frame can swing, and an external force that acts on the reader support frame. A pile driving machine including a load receiving portion for performing the above is disclosed.

In this pile driving machine, the load receiving portion constitutes a support structure for supporting the external force acting on the leader support frame, so that the external force acts directly on the rotation support portion and the rotation support portion is damaged. It is preventing.
JP 2006-219916 A

  However, in the pile driver in Patent Document 1, since the load receiving portion is a dedicated part constituting the support structure, there is a problem that the number of parts increases and the structure becomes complicated.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a pile driver that does not require a dedicated part and can simplify the structure.

  In order to solve this object, a pile driving machine according to claim 1 includes a vehicle body and a leader which is erected on the vehicle body and on which an auger is mounted. And a leader support member that is disposed on the vehicle body and supports the reader in an upright state, a connection part that slidably connects the leader support member to the vehicle body, and a connection part that is formed. An external force support portion that is locked to the locking portion in a direction that intersects the swinging direction of the reader support member, and the external force support portion is locked to the locking portion, whereby the reader support member The connecting portion supports an external force acting on the reader support member in a direction crossing the swinging direction.

  The pile driver according to claim 2 is the pile driver according to claim 1, wherein a pair of the locking portions are provided in a direction crossing the swinging direction, and the pair of locking portions are on the leader support member side. The external force support portions are provided on the inner side or the outer side of the pair of locking portions in a direction intersecting the swing direction, respectively. The external force support portions project from the vehicle body side, extend in the swing direction, and are respectively locked by the pair of locking portions.

  The pile driver according to claim 3 is the pile driver according to claim 1 or 2, wherein the leader is connected to the leader support member so as to be able to undulate in a direction crossing the swinging direction.

  According to the pile driver of the first aspect, the leader support member supports the leader in an upright state and is swingably connected to the vehicle body by the connecting portion. Further, the external force support portion is formed at the connecting portion and is locked by a locking portion provided on the vehicle body in a direction intersecting with the swinging direction of the reader support member. Therefore, by connecting the external force support portion to the locking portion, the load due to the rotational drive reaction force of the auger can be supported by the locking portion, and the connecting portion is intended to swing the leader support member Since no load acts on the connector, breakage of the connecting portion can be avoided.

  In addition, according to the first aspect, since the external force support portion is formed by using the connecting portion, there is an effect that a dedicated part is not required and the structure can be simplified. Furthermore, if the structure can be simplified, there is an effect that such a structure can be configured with a small space.

  In addition, when the support structure for supporting the load due to the rotational drive reaction force of the auger is configured with dedicated parts, the number of parts increases, so that dimension management such as processing dimensions and assembly dimensions of each part becomes complicated. In addition, dimensional accuracy such as processing accuracy and assembly accuracy of each component is required to be high, and manufacturing of the pile driving machine becomes extremely difficult. However, the number of components can be reduced by using the connecting portion as in claim 1. Therefore, there exists an effect that a pile driver can be manufactured easily. Furthermore, if the number of parts can be reduced, the manufacturing cost can be reduced.

  According to the pile driver according to claim 2, in addition to the effect produced by the pile driver according to claim 1, a pair of locking portions are provided in a direction intersecting the swinging direction of the leader support member, The stop portions protrude from the reader support member side, and the external force support portions are provided inside or outside the pair of locking portions in a direction intersecting the swinging direction of the reader support member. Since the portion protrudes toward the vehicle body side, it is possible to avoid a decrease in rigidity of the vehicle body or the leader support member as compared with the case where either the locking portion or the external force support portion is recessed. is there.

  Further, since the locking portion and the external force support portion are respectively extended in the swing direction of the reader support member, the area where the external force support portion is locked to the locking portion can be increased, and the support structure There is an effect that rigidity can be strengthened.

  According to the pile driver according to claim 3, in addition to the effect of the pile driver according to claim 1 or 2, the leader is connected to the leader support member so as to be able to undulate in a direction crossing the swinging direction. Therefore, there is an effect that the undulation force when the leader undulates can be supported by the connecting portion.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, a schematic configuration of the pile driving machine 1 will be described with reference to FIG. FIG. 1 is a side view of a pile driving machine 1 according to an embodiment of the present invention. In addition, the arrow UD of FIG. 1, LR, and FB has shown the up-down direction, the left-right direction, and the front-back direction of the pile driver 1, respectively.

  As shown in FIG. 1, the pile driving machine 1 mainly includes a vehicle body 10, a leader 20 disposed in a front (arrow F direction) portion of the vehicle body 10, and an auger 30 disposed in the leader 20. In preparation, for example, the auger 30 is moved up and down by the lifting device 31 while rotating the rotation driving device (not shown) of the auger 30 to rotate the excavating rod (not shown) attached to the auger 30 while rotating the ground. The ground excavation work is carried out by digging in, and the steel pipe pile (not shown) attached to the auger 30 is pressed into the ground while rotating to perform the pile driving work.

  The vehicle body 10 mainly includes a lower traveling body 11 as a traveling device and an upper swing body 12 disposed on the lower traveling body 11. In the present embodiment, the lower traveling body 11 is configured as a crawler traveling device. The upper turning body 12 is a main body portion of the pile driving machine 1 in which a power unit 13 that is a driving source of the auger 30 and a driver's cab 14 are disposed, and is connected to the lower traveling body 11 via a turning device (not shown). It is supported so that it can turn.

  The leader 20 is for supporting the auger 30, is pivotally supported on the support frame 40 by the support shaft 21, is connected to the upper swing body 12 through the support frame 40, and is also connected to the vehicle body by the backstay cylinder 22. 10 is supported from the back (arrow B direction) side. The backstay cylinder 22 is an actuator for raising and lowering the leader 20, and an upper end side (rod side) is pivotally supported by the leader 20 by a support shaft 23, and a lower end side (main body side) is a support shaft 24 (FIG. 2 (see 2 (a)). As a result, the leader 20 stands up with respect to the vehicle body 10 when the backstay cylinder 22 is driven to extend, and to the rear side of the vehicle body 10 (in the direction of arrow B) around the support shaft 21 when the backstay cylinder 22 is driven to shorten. To surrender.

  As described above, the auger 30 is a working device for performing pile driving work and the like, and is supported by the leader 20 by the lifting device 31 so as to be lifted and lowered. As a result, the auger 30 rises upward (in the direction of the arrow U) when the lifting device 31 is driven upward, and descends downward (in the direction of the arrow D) when the lifting device 31 is driven downward.

  By the way, when a pile driving operation or the like is performed by the auger 30, if the ground is inclined in the left-right direction of the vehicle body 10 (arrow LR direction), the vehicle body 10 is inclined, and the reader 20 is inclined as the vehicle body 10 is inclined. As a result, such work cannot be performed normally. Therefore, the support frame 40 is swingably connected to the upper swing body 12 via a swinging structure for swinging the reader 20 in the left-right direction of the vehicle body 10 (arrow LR direction).

  Here, with reference to FIG. 2, the swing structure described above will be described. Fig.2 (a) is an enlarged side view of the pile driver 1 which expands and shows the part shown by A of FIG. 1, FIG.2 (b) is a pile driver in the arrow IIb direction view of Fig.2 (a). 3 is an enlarged front view of the machine 1. FIG. Note that arrows UD, LR, and FB in FIG. 2 indicate the up-down direction, the left-right direction, and the front-rear direction of the pile driving machine 1, respectively. In FIG. 2A, a part of the upper swing body 12, the leader 20, and the backstay cylinder 22 is omitted, and in FIG. 2B, a part of the upper swing body 12 and the leader 20 and the backstay cylinder 22 are omitted.

  As shown in FIG. 2, the swing structure for swinging the reader 20 in the left-right direction of the vehicle body 10 (arrow LR direction) is a tilt disposed on the side (arrow R direction) portion of the support frame 40. A cylinder 50 and a connecting portion 60 disposed on a side portion of the support frame 40 opposite to the side on which the tilt cylinder 50 is disposed (in the direction of the arrow L) are configured. ing.

  The tilt cylinder 50 is an actuator for swinging the support frame 40. The upper end side (main body side) is pivotally supported by the pair of upper cylinder brackets 70 and 71 by the support shaft 51, and the lower end side (rod side). ) Is pivotally supported on the pair of lower cylinder brackets 72 and 73 by the support shaft 52.

  The connecting part 60 is for connecting the support frame 40 to the upper swing body 12 so as to be swingable, and a pair of tilt brackets 61 and 62 (see FIG. 3) disposed on the support frame 40 and an upper swing. A pair of support brackets 63 and 64 (see FIG. 4) disposed on the body 12 and a support shaft 65 that pivotally supports the tilt brackets 61 and 62 on the support brackets 63 and 64 are configured.

  By configuring the swing structure as described above, the support frame 40 swings to the left side of the vehicle body 10 (arrow L direction) around the support shaft 65 of the connecting portion 60 when the tilt cylinder 50 is driven to extend. On the other hand, when the tilt cylinder 50 is driven to be shortened, the tilt cylinder 50 swings to the right of the vehicle body 10 (in the direction of arrow R) about the support shaft 65 of the connecting portion 60. Thereby, even when the ground is inclined in the left-right direction of the vehicle body 10 (arrow LR direction), the reader 20 can be swung in the left-right direction of the vehicle body 10 (arrow LR direction).

  Next, a detailed configuration of the support frame 40 will be described with reference to FIG. 3 is an external view of the support frame 40, FIG. 3 (a) is a right side view of the support frame 40, and FIG. 3 (b) is a front view of the support frame 40 in the direction of arrow IIIb in FIG. 3 (a). 3 (c) is a bottom view of the support frame 40 as viewed in the direction of arrow IIIc in FIG. 3 (a), and FIG. 3 (d) is a view of the support frame 40 in the direction of arrow IIId in FIG. 3 (b). The left side views are respectively shown. 3 indicate the vertical direction, left-right direction, and front-rear direction of the support frame 40. The vertical direction, left-right direction, and front-rear direction of the pile driver 1 are indicated by arrows UD, LR, and FB in FIG. Correspond to each.

  As shown in FIG. 3, the support frame 40 is configured to include a main frame 41 and a subframe 42 that is connected to the rear (arrow B direction) portion of the main frame 41. The main frame 41 is for pivotally supporting the reader 20, and includes a substantially rectangular base part 41a and a pair of leader support parts 41b and 41c suspended from both edge portions of the long side of the base part 41a. And is formed in a substantially U shape in front view. Further, through holes 41b1 and 41c1 are formed in the reader support portions 41b and 41c, respectively, and the support shaft 21 is inserted through the through holes 41b1 and 41c1 (see FIG. 2). As a result, the reader 20 is pivotally supported by the support frame 40. Reinforcing members 43 and 44 are disposed on the leader support portions 41b and 41c, respectively, and the rigidity of the main frame 41 is enhanced by the reinforcing members 43 and 44.

  The sub frame 42 is for pivotally supporting the backstay cylinder 22, and is a pair of cylinder support portions 42a disposed opposite to each other at a predetermined interval in the left and right direction (arrow LR direction) of the support frame 40. , 42 b and a pair of cylinder support portions 42 a, 42 b that are connected to each other and fixed to the main frame 41. Further, through holes 42a1 and 42b1 are formed in the cylinder support portions 42a and 42b, respectively, and the support shaft 24 is inserted into the through holes 42a1 and 42b1 (see FIG. 2A). As a result, the backstay cylinder 22 is pivotally supported by the support frame 40.

  A pair of upper cylinder brackets 70 and 71 project from the side surface (the surface in the direction of arrow R) of the support frame 40. As described above, the upper cylinder brackets 70 and 71 are for pivotally supporting the tilt cylinder 50, and are disposed to face each other at a predetermined interval in the front-rear direction (arrow FB direction) of the support frame 40. ing. The upper cylinder brackets 70 and 71 have through holes 70a and 71a, respectively, and the support shaft 51 is inserted into the through holes 70a and 71a (see FIG. 2). Thus, the tilt cylinder 50 is pivotally supported by the pair of upper cylinder brackets 70 and 71.

  In addition, a pair of tilt brackets 61 and 62 project from the side surface (the surface in the direction of arrow L) on the side surface of the support frame 40 opposite to the side where the cylinder brackets 70 and 71 are disposed. . As described above, the tilt brackets 61 and 62 are for constituting the connecting portion 60 together with the support brackets 63 and 64 and the support shaft 65, and are arranged at a predetermined interval in the front-rear direction (arrow FB direction) of the support frame 40. Are arranged opposite to each other. The tilt brackets 61 and 62 are provided with through holes 61a and 62a, respectively, and the support shaft 65 is inserted into the through holes 61a and 62a (see FIGS. 2B and 5). . As a result, the pair of tilt brackets 61 and 62 are pivotally supported by the pair of support brackets 63 and 64, and the connecting portion 60 is configured.

  Further, external force support portions 61b and 62b are integrally formed on the tilt brackets 61 and 62, respectively, and a pair of external force support portions 61b and 62b is configured. The external force support portions 61b and 62b are portions that are respectively locked to locking portions 80 and 81 (see FIG. 4), which will be described later, and projecting downward (in the direction of arrow D) of the support frame 40, respectively. Each of the through holes 61a and 62a extends linearly to the right direction (arrow R direction) side of the support frame 40 perpendicular to the axis O of the through holes 61a and 62a. That is, the pair of external force support portions 61b and 62b are provided to protrude toward the upper swing body 12 in a state where the support frame 40 and the upper swing body 12 are connected to each other by the connecting portion 60, and Each is extended in a direction intersecting the swing direction, and is configured to be locked by a pair of locking portions 80 and 81 (see FIG. 5).

  Next, a detailed configuration of the upper swing body 12 will be described with reference to FIG. 4 is an external view of the upper swing body 12, FIG. 4 (a) is a top view of the upper swing body 12, and FIG. 4 (b) is an upper swing body 12 as viewed in the direction of arrow IVb in FIG. 4 (a). FIG. 4C shows a front view of the upper right turning body 12 as viewed in the direction of arrow IVc in FIG. In addition, the arrow UD of FIG. 4, LR, FB has each shown the up-down direction, the left-right direction, and the front-back direction of the upper turning body 12, and the up-down direction, left-right direction, and front-back direction of the pile driver 1 are each shown. Each corresponds to a direction. 4A and 4B, the rear (arrow B direction) portion of the upper swing body 12 is omitted, and in FIG. 4C, the lower portion of the upper swing body 12 ( An arrow D direction) is omitted.

  As shown in FIG. 4, a pair of lower cylinder brackets 72, 73, a pair of support brackets 63, 64, and a pair of locking portions 80, 81 are provided in the front (arrow F direction) portion of the upper swing body 12. Is arranged.

  A pair of lower cylinder brackets 72 and 73 project from a side surface (surface in the direction of arrow R) of the upper swing body 12 via a fixing member 74. As described above, the lower cylinder brackets 72 and 73 are for pivotally supporting the tilt cylinder 50, and are disposed to face each other at a predetermined interval in the front-rear direction (arrow FB direction) of the upper swing body 12. Has been. The lower cylinder brackets 72 and 73 have through holes 72a and 73a, respectively, and the support shaft 52 is inserted into the through holes 72a and 73a (see FIG. 2). Thus, the tilt cylinder 50 is pivotally supported by the pair of lower cylinder brackets 72 and 73.

  A pair of support brackets 63 and 64 project from the upper surface (surface in the direction of arrow U) of the upper swing body 12. As described above, the support brackets 63 and 64 are for forming the connecting portion 60 together with the tilt brackets 61 and 62 and the support shaft 65, and are predetermined in the front-rear direction (arrow FB direction) of the upper swing body 12. They are arranged opposite to each other at intervals. The support brackets 63 and 64 have through holes 63a and 64a, respectively, and the support shaft 65 is inserted through the through holes 63a and 64a (see FIGS. 2B and 5). . As a result, the pair of tilt brackets 61 and 62 are pivotally supported by the pair of support brackets 63 and 64, and the connecting portion 60 is configured.

  In addition, a pair of locking portions 80 and 81 project from the upper surface (the surface in the direction of arrow U) of the upper swing body 12. As described above, the locking portions 80 and 81 are for locking the external force support portions 61b and 62b formed on the tilt brackets 61 and 62, respectively. (B direction) are opposed to each other at a predetermined interval, and are arranged orthogonal to an imaginary line S that connects the axial centers of the through holes 63a, 64a formed in the support brackets 63, 64. That is, the pair of locking portions 80 and 81 protrudes toward the upper swing body 12 in a state where the support frame 40 and the upper swing body 12 are connected to each other by the connecting portion 60, and Each is extended in a direction crossing the swinging direction, and is configured to lock the pair of external force support portions 61b and 62b (see FIG. 5). Note that through holes 80a and 81a are formed in the locking portions 80 and 81, respectively, and a support shaft 65 is inserted through the through holes 80a and 81a (see FIG. 5). In addition, reinforcing members 82 and 83 are disposed on the upper swing body 12, and the rigidity of the locking portions 80 and 81 is reinforced by the reinforcing members 82 and 83.

  Next, with reference to FIG. 5, an operation when the support frame 40 configured as described above and the upper swing body 12 are connected to each other by the connecting portion 60 will be described. FIG. 5 is a cross-sectional view of the pile driving machine 1 taken along the line V-V in FIG. In addition, the arrow UD of FIG. 5, LR, FB has shown the up-down direction, the left-right direction, and the front-back direction of the pile driving machine 1, respectively. In FIG. 5, the rear (arrow B direction) portion and the side (arrow L and R direction) portions of the upper swing body 12 are omitted.

  As shown in FIG. 5, when the support frame 40 and the upper swing body 12 are connected to each other by the connecting portion 60, the direction (arrow F) that intersects the swing direction (arrow LR direction) of the support frame 40. -B direction), the pair of external force support portions 61b and 62b formed on the connecting portion 60 are located outside with the pair of locking portions 80 and 81 interposed therebetween, and the pair of external force support portions 61b and 62b are a pair of engagement members. Locked to the stop portions 80 and 81. As a result, the load due to the rotational driving reaction force of the auger 30 disposed in the reader 20 can be supported by the locking portions 80 and 81, and the connecting portion 60 intended to swing the support frame 40 is included in the connecting portion 60. Since the load does not act, the breakage of the connecting portion 60 can be avoided.

  In the present embodiment, the slide plates 84 and 85 are disposed on the locking surfaces to which the external force support portions 61b and 62b of the locking portions 80 and 81 are locked so that no galling or the like occurs. . However, the slide plates 84 and 85 may be oilless plates or the like obtained by dispersing and sintering a self-lubricating resin material or a solid lubricant mainly composed of graphite in a special copper alloy. Thus, the support frame 40 can be continuously swung without the need for a lubricant.

  As described above, according to the pile driving machine 1 in the present embodiment, the external force support portions 61 b and 62 b of the connecting portion 60 are locked to the locking portions 80 and 81, so that the auger provided in the leader 20. The load due to the rotational driving reaction force of 30 can be supported by the locking portions 80 and 81, and the load does not act on the connecting portion 60 for the purpose of swinging the support frame 40. Can be avoided.

  In addition, since the external force support portions 61b and 62b are formed using the connecting portion 60, a dedicated component is not required and the structure can be simplified. Furthermore, if the structure can be simplified, the structure can be configured with less space. As a result, even in a small pile driving machine with a small size of the vehicle body 10, a support structure for supporting a load due to the rotational drive reaction force of the auger 30 can be easily configured.

  In addition, when the support structure is configured with dedicated parts, the number of parts increases, so that dimensional management such as machining dimensions and assembly dimensions of each part becomes complicated, and dimensional accuracy such as machining accuracy and assembly precision of each part. Is required with high accuracy, and manufacturing the pile driving machine 1 becomes extremely difficult. For example, in the dimension indicated by X in FIG. 5, the external force support portions 61 b and 62 b interfere with the locking portions 80 and 81, or a gap is formed between the external force support portions 61 b and 62 b and the locking portions 80, 81. However, when the support structure is configured using the connecting portion 60 as in the present embodiment, the external force support portions 61b and 62b are cut. Thereby, the dimensional accuracy of the dimension X can be ensured with high accuracy. On the other hand, when the support structure is configured with dedicated parts, the dedicated parts need to be arranged separately from the connecting portion 60, and accordingly, the dimensional error is added synergistically and the above-described problem occurs. It becomes easy to do. On the other hand, since the number of parts can be reduced by using the connection part 60 like the pile driving machine 1 in this embodiment, the pile driving machine 1 can be manufactured easily. Furthermore, if the number of parts can be reduced, the manufacturing cost can be reduced.

  In addition, a pair of locking portions 80 and 81 are provided in a direction crossing the swinging direction of the support frame 40, and the pair of locking portions 80 and 81 are provided to protrude toward the support frame 40, respectively, and an external force support portion. A pair 61b and 62b are provided outside the pair of locking portions 80 and 81 in a direction crossing the swinging direction of the support frame 40, and the pair of external force support portions 61b and 62b are provided to protrude toward the upper swing body 12 side. Therefore, compared with the case where any one of the latching | locking parts 80 and 81 or the external force support parts 61b and 62b is recessedly provided, the rigidity fall of the upper revolving body 12 or the support frame 40 can be avoided.

  Further, since the locking portions 80 and 81 and the external force support portions 61b and 62b are respectively extended in the swing direction of the support frame 40, the external force support portions 61b and 62b are locked to the locking portions 80 and 81. The area can be increased, and the rigidity of the support structure can be enhanced.

  Furthermore, since the leader 20 is connected to the support frame 40 so as to be able to undulate in a direction crossing the swinging direction, the undulation force when the leader 20 undulates can be supported by the connecting portion 60.

  In the present embodiment, the external force in the direction intersecting with the swinging direction acting on the reader support member according to claim 1 is a load due to the rotational driving reaction force of the auger 30 and the backstay cylinder 22 is turned upward. In the case of being pivotally supported by the body 12, the undulation force when the leader 20 undulates corresponds.

  As described above, the present invention has been described based on the embodiments, but the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. It can be guessed.

  For example, in the above embodiment, the case where the locking portions 80 and 81 protrude toward the support frame 40 in a state where the support frame 40 and the upper swing body 12 are connected to each other by the connection portion 60 has been described. For example, the locking portions 80 and 81 may be recessed in the upper surface of the upper swing body 12. However, when the locking portions 80 and 81 are recessed on the upper surface of the upper swing body 12, the rigidity of the upper swing body 12 is reduced as described above. , 81 are preferably projected toward the support frame 40 side.

It is a side view of a pile driver in one embodiment of the present invention. (A) is an enlarged side view of a pile driving machine showing the portion indicated by A in FIG. 1 in an enlarged manner, and (b) is an enlarged front view of the pile driving machine as viewed in the direction of arrow IIb in FIG. 2 (a). It is. It is an external view of a support frame, (a) is a right side view of the support frame, (b) is a front view of the support frame in the direction of arrow IIIb in FIG. 3 (a), and (c) is FIG. FIG. 3A is a bottom view of the support frame when viewed in the direction of arrow IIIc in FIG. 3A, and FIG. 3D is a left side view of the support frame when viewed in the direction of arrow IIId in FIG. It is an external view of an upper swing body, (a) is a top view of the upper swing body, (b) is a side view of the upper swing body in the direction of arrow IVb in FIG. The front view of the upper right turning body in the arrow IVc direction view of Fig.4 (a) is each shown. It is sectional drawing of the pile driver in the VV line | wire of FIG.2 (b).

Explanation of symbols

1 Pile driver 10 Car body 12 Upper turning body (part of the car body)
20 Leader 30 Auger 40 Support frame (leader support member)
60 Connecting part 61, 62 Tilt bracket (part of connecting part)
61b, 62b External force support part 63, 64 Support bracket (part of the connection part)
65 Support shaft (part of connecting part)
80, 81 Locking part

Claims (3)

In a pile driving machine comprising a vehicle body and a leader standing on the vehicle body and disposed with an auger,
A locking portion provided on the vehicle body;
A reader support member disposed on the vehicle body and supporting the reader in an upright state;
A connecting portion for connecting the reader support member to the vehicle body so as to be swingable;
An external force support portion that is formed on the connecting portion and is locked to the locking portion in a direction intersecting with the swinging direction of the reader support member;
When the external force support portion is locked to the locking portion, the external force in the direction intersecting the swing direction acting on the reader support member is allowed to be connected while allowing the reader support member to swing. Pile driver characterized by being supported by the part. A pair of the locking portions are provided in a direction crossing the swinging direction, and the pair of locking portions are respectively provided to protrude toward the reader support member and extend in the swinging direction.
The external force support portions are provided inside or outside the pair of locking portions in a direction intersecting the swing direction, and the pair of external force support portions project from the vehicle body side and the swing direction. The pile driving machine according to claim 1, wherein each of the pile driving machines is extended to each other and locked to the pair of locking portions.   3. The pile driving machine according to claim 1, wherein the leader is connected to the leader support member so as to be able to undulate in a direction intersecting the swinging direction.

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