JP5159446B2 - Pile driver and leader assembly method - Google Patents

Description

  The present invention relates to a pile driving machine and a leader assembling method, and more particularly to a pile driving machine and a leader assembling method for disassembling and assembling a leader by switching between a transport state and a working state.

  The pile driver includes a reader having a lower reader (basic reader) provided to be tiltable on a front bracket in front of the base machine, and an upper reader (extension reader) removably connected to an upper portion of the lower reader. A back stay provided at the rear part of the base machine is supported so as to be raised and lowered, and a work device such as an auger drive device is moved up and down along the leader to perform work such as excavation. When transporting a large pile driver, the leader is removed from the base machine or the leader is disassembled.

As a method for assembling the leader when the pile driving machine is changed from the transported state to the working state, a method in which the leader is tilted forward of the base machine (for example, see Patent Document 1), A method (for example, see Patent Document 2) that is performed in a state of being tilted is generally known.
JP 2001-40663 A JP 2006-291634 A

  However, when the leader is knocked down or raised, the backstay stroke used at the time of work is insufficient, so it is different from the backstay whether the leader is tilted forward or backward. It is necessary to use an auxiliary cylinder, connect the rear end of the backstay to a hoisting frame provided in the base machine, or use a hoisting rope.

  In particular, in a pile driving machine equipped with a large working device such as an auger having a large rotational torque, a large leader corresponding to the rotational torque of the working device is required. Therefore, the leader described in Patent Document 1 is tilted forward. In the method, a troublesome work of attaching and detaching a large working device to and from the reader is required. Further, in Patent Document 1, a hoisting frame and a hoisting cylinder for hoisting the hoisting frame are defined as a working backstay. There is a problem that it needs to be provided separately. Further, in the method of tilting the leader backward as described in Patent Document 2, the operator cab provided at the upper part of the base machine must be avoided, and the height of the leader must be cleared because the overall height must also satisfy transportation restrictions. There is a limit, and there is a problem that an auxiliary cylinder separate from the backstay must be provided.

  Therefore, the present invention eliminates the need for auxiliary devices such as undulating frames and auxiliary cylinders, can cope with an increase in the size of the leader, and can easily and safely switch between a transport state and a working state, and a leader. It is an object to provide an assembly method.

To achieve the above object, pile driver of the present invention includes a lower reader which tiltably attached to the base machine front portion of the front bracket, an upper reader that is detachably connected to the upper end of said lower reader A pile driving machine in which the leader has a retractable back stay provided at the rear part of the base machine, and the working device is mounted on the leader so as to be movable up and down. In addition, a guide rail for guiding the sliding holder provided at the tip of the backstay in the longitudinal direction of the reader is provided in a continuous state, and a lower locking portion provided in the lower leader and an upper leader are provided in the sliding holder. Sliding holder in the longitudinal direction of the reader by detachably locking to the upper locking part Position locking means for securing provided, in the transportation state, the by shortening the backstay, the engaged the locking means to the lower locking portion of the lower leader upper reader removed The lower reader is vertically erected, and in the working state, the upper reader is connected to the upper end of the lower reader that is locked by the locking means and is erected in the vertical direction. The back stay is extended, the sliding holder is raised along the guide rail, the locking means is locked to the upper locking portion of the upper reader, and the reader is erected vertically. It is characterized in that the form.

Further, the pile driver of the present invention is a forward tilt regulating member that regulates the forward tilt angle of the leader by contacting the rear surface of the leader when the leader is tilted forward to the front portion of the base machine below the front bracket. When the pile driver in a transported state is switched to the working state, the back stay is slightly extended while the locking means is locked to the lower locking portion, and the leader is tilted forward. The lower rear surface of the lower reader is brought into contact with the front surface of the forward tilt restricting member so that the reader is tilted forward, and then the locked state of the locking means with the lower locking portion is released. The back stay is extended to raise the sliding holder along the guide rail, and the sliding holder can slide on the guide rail on both sides of the front surface of the holder substrate. Each of which includes a slide portion to be engaged, a shaft attachment portion on which a tip of the backstay is rotatably connected to both side portions of the rear surface of the holder substrate, and a lower leader at the center portion of the rear surface of the holder substrate. And a locking pin that is a locking means that is detachably locked to the lower locking portion and the upper locking portion respectively provided at a predetermined position on the rear surface of the upper reader, and the locking pin A guide cylinder for holding the stop pin movably in the axial direction, a release cylinder for projecting and retracting the lock pin via a link, a spring for holding the lock pin at a lock position via the link, It is characterized in that a switch is provided for detecting the state in which the locking pin appears and disappears .

The leader assembly method according to the present invention is a method of switching the pile driver having the above-described configuration from the working state to the transporting state and from the transporting state to the working state. Release the locking state of the locking means that is locked to the upper locking part in the working state, shorten the back stay and lower the sliding holder along the guide rail, and the sliding holder is lowered from the upper leader part When the reader is lowered to a predetermined position, the locking means is locked to the lower locking portion, the lower reader is fixed by the backstay, and the lower reader is erected in the vertical direction. When switching from the upper end of the reader to the transport state and switching from the transport state to the working state, in the transport state where the locking means is locked to the lower locking portion, The sliding holder is lifted along the guide rail by connecting the upper leader to the upper end of the lower leader, releasing the locking state between the locking means and the lower locking portion, and extending the back stay. However, when the upper leader is raised to a predetermined position, the locking means is locked to the upper locking portion, and the reader is set up in the vertical direction to be in the working state .

Further, the reader assembly method of the present invention is characterized in that, in the transport state, a working device is mounted on the lower leader, and the leader is tilted forward when the sliding holder is raised along the guide rail. It is characterized by being in a state. Further, when switching from the transport state to the working state, the back stay is slightly extended while the locking means is locked to the lower locking portion, the leader is tilted forward, and the lower portion is The lower rear surface of the reader is brought into contact with the front surface of a forward tilt restricting member provided at the front portion of the base machine below the front bracket, and the reader is brought into a forward tilted state. It is characterized by releasing the locked state .

  According to the present invention, when switching from the working state to the transport state, first, the locking state of the locking means locked to the upper locking portion in the working state is released, and the backstay is shortened to perform sliding. The holder is lowered along the guide rail, and when the sliding holder is lowered from the upper leader portion to a predetermined position of the lower leader, the locking means is locked to the lower locking portion, and the lower leader is fixed by the back stay. By doing so, the upper leader can be removed from the upper end of the lower leader and brought into a transported state.

  Also, when switching from the transport state to the working state, the upper reader is connected to the upper end of the lower reader in the transport state where the locking means is locked to the lower locking portion, and the locking means and the lower locking are connected. The sliding stay is lifted along the guide rail by releasing the locking state with the section and extending the backstay, and when the sliding holder is raised to a predetermined position of the upper leader, the locking means is moved to the upper locking section. It can be made into a working state by making it latch to.

  In the transport state, the lower leader is mounted on the front bracket at the front of the base machine and is fixed in a standing state by the backstay. When switching to the working state, it is not necessary to attach or detach the working device, and the switching work can be simplified and the switching time can be shortened. Further, when the sliding holder is raised along the guide rail, the extension force of the backstay can be effectively used as the lifting force of the sliding holder by setting the leader to the forward tilted state.

  1 is a side view of a working state showing an embodiment of the pile driving machine of the present invention, FIG. 2 is a front view showing a portion of a sliding holder, FIG. 3 is a sectional view taken along line III-III in FIG. 2, and FIG. 5 is a plan view, FIG. 6 is a side view showing a state where the upper leader is connected to the lower leader, FIG. 7 is a side view showing a state where the leader is tilted forward, and FIG. FIG. 9 is a side view showing a state in which the sliding holder is raised, and FIG. 9 is a side view showing a state in which the reader is assembled in a working state.

  First, a pile driving machine 11 shown in this embodiment is provided at a traveling part 12 provided with a crawler, a base machine 13 provided on the traveling part 12 so as to be able to turn, and a front part of the base machine 13. A leader 15 is provided on the front bracket 14 so as to be tiltable, and a pair of left and right backstays 16 that support the leader 15 from the rear portion of the base machine so as to be raised and lowered. The reader 15 includes a lower reader (basic reader) 17 attached to the front bracket 14 and an upper reader (extended reader) detachably connected to the upper end of the lower reader 17 by flange connection using bolts and nuts. The upper reader 18 is formed in a state where a plurality of reader members are detachably connected.

  A work device 20 such as an auger drive device that can be moved up and down along guide gibbs 19 provided over the entire length of both sides of the reader 15 is provided on the front surface side of the reader 15, and a lower reader 17 is provided on the rear surface side of the reader 15. A pair of left and right guide rails 22 for guiding the sliding holder 21 provided at the tip of the back stay 16 so as to be movable in the longitudinal direction of the leader is provided between the upper part of the upper stay 18 and the intermediate position in the vertical direction of the upper leader 18. It has been.

  The sliding holder 21 includes slide portions 24 that are slidably engaged with the guide rails 22 on both sides of the front surface of the holder substrate 23, and the tip of the backstay 16 can be rotated on both sides of the rear surface of the holder substrate 23. And a lower locking portion 26 and an upper portion respectively provided at positions set in advance on the rear surfaces of the lower reader 17 and the upper reader 18. A locking pin 28 that is a locking means that is detachably locked to the locking portion 27, a guide cylinder 29 that holds the locking pin 28 movably in the axial direction, and a locking pin via a link 30. The release cylinder 31 that causes the lock 28 to move in and out, the spring 32 that holds the lock pin 28 in the lock position via the link 30, and the lock state of the lock pin 28 (protruding state) Switch 33 for detecting are provided.

  The relationship between the locking pin 28 and the lower locking portion 26 and the upper locking portion 27 is that when the sliding holder 21 descends to the lowermost end of the guide rail 22 and is positioned on the upper rear surface of the lower leader 17, When the sliding holder 21 rises to the uppermost end of the guide rail 22 and is positioned at a predetermined height on the rear surface of the upper leader 18, the locking pin 28 is locked to the upper locking position. It is set so that it can be inserted into the section 27.

  Further, the lower rear surface of the reader 15 is brought into contact with the front portion of the base machine 13 below the front bracket 14 when the reader 15 is tilted forward, and the forward tilt angle of the reader 15 is restricted. A forward tilt stopper 34 which is a forward tilt restricting member for holding 15 in the forward tilt state is provided.

  As shown in FIGS. 4 and 5, in the pile driving machine 11 in the transported state, the working device 20 is lowered to the front surface of the lower end portion of the lower leader 17 from which the upper leader 18 is removed, and the backstay 16 is shortened. The sliding holder 21 is lowered to the lowermost end of the guide rail 22 and the locking pin 28 is locked to the lower locking portion 26. The pile driver 11 is formed in such a size that it can be transported by being loaded on a carrier bed of a transport vehicle in this transport state.

  When the pile driver 11 in the transport state is switched to the working state, the upper leader 18 is first lifted with a crane and connected to the upper end portion of the lower leader 17 in the transport state. A top sheave 35 is attached to the state shown in FIG. Next, the backstay 16 is slightly extended while the locking pin 28 is locked to the lower locking portion 26, and the reader 15 is tilted forward as shown in FIG. The lower rear surface is brought into contact with the front surface of the forward tilt stopper 34 to hold the reader 15 in the forward tilt state. At this time, in order to securely hold the forward tilted state of the reader 15, the lower leader 17 and the forward tilt stopper 34 may be connected and fixed by a connecting member such as a connecting pin as necessary.

  After the leader 15 is tilted forward, the release cylinder 31 is extended and the locking pin 28 is pulled out from the lower locking portion 26 to make the sliding holder 21 movable, and then the backstay 16 is extended to perform sliding. The holder 21 is raised along the guide rail 22. At this time, the lower rear surface of the leader 15 is brought into contact with the forward tilt stopper 34 to hold the leader 15 in the forward tilted state, whereby the back stay 16 extends and the force for pressing the sliding holder 21 against the guide rail 22 is exerted. The sliding holder 21 can be effectively used as a force in a direction in which the sliding holder 21 is raised along the guide rail 22.

  As shown in FIG. 8, after the sliding holder 21 is raised from the lowermost end of the guide rail 22 on the lower leader rear side to the uppermost end of the guide rail 22 on the upper leader rear side, the release cylinder 31 is shortened and the spring 32 The locking pin 28 protrudes forward from the sliding holder 21 by the restoring force, and the locking pin 28 is inserted into the upper locking portion 27 to fix the sliding holder 21 at a predetermined height position of the reader 15. Then, by operating the back stay 16 and adjusting the angle of the reader 15, as shown in FIG. 9, the assembled reader 15 can be set in a vertical state. Thus, when assembling the leader 15, only one crane for lifting the upper leader 18 needs to be prepared, and there is no need to provide auxiliary devices such as a hoisting frame and an auxiliary cylinder.

  In addition, since attachment / detachment of a wire, hydraulic piping, etc. can be performed similarly to the conventional pile driver, detailed description is abbreviate | omitted. In addition, the number of leader members connected to the upper leader 18 is arbitrary, and the length of the leader 15 can be changed with the parts other than the leader member having the upper locking portion 27 in a non-connected state. Furthermore, it is possible to perform operations such as excavation by using only the lower leader 17 without connecting the upper leader 18.

  It is also possible to hold the reader in a forward tilted state by other holding means without providing the forward tilt restricting member (forward tilt stopper 34). Depending on the vertical positional relationship between both ends of the backstay 16, the reader 15 may be The sliding stay 21 can be lifted along the guide rail 22 by extending the back stay 16 while standing in the vertical direction without tilting forward. Further, by lifting the sliding holder 21 with a crane or the like, it is possible to extend the backstay 16 while raising the sliding holder 21 along the guide rail 22.

It is a side view of the working state which shows one example of a pile driver of this invention. It is a front view which shows the part of a sliding holder. FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is a side view which shows the pile driver of a transport state. It is a top view which similarly shows the pile driver of a transportation state. It is a side view which shows the state which connected the upper leader to the lower leader. It is a side view which shows the state which made the reader lean forward. It is a side view which shows the state which raised the sliding holder. It is a side view which shows the state which assembled the leader in the working state.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Pile driver, 12 ... Running part, 13 ... Base machine, 14 ... Front bracket, 15 ... Leader, 16 ... Back stay, 17 ... Lower leader, 18 ... Upper leader, 19 ... Guide give, 20 ... Working device, 21 ... Sliding holder, 22 ... Guide rail, 23 ... Holder substrate, 24 ... Slide part, 25 ... Axis mounting part, 26 ... Lower locking part, 27 ... Upper locking part, 28 ... Locking pin, 29 ... Guide cylinder, 30 ... Link, 31 ... Release cylinder, 32 ... Spring, 33 ... Switch, 34 ... Forward tilt stopper, 35 ... Top sheave

Claims (6)

A retractable backstay provided at the rear part of the base machine is provided with a leader having a lower leader attached to the front bracket of the front part of the base machine so as to be tiltable and an upper leader detachably connected to the upper end part of the lower leader. In the pile driving machine which is supported so as to be able to undulate, and the working device is mounted on the leader so as to be movable up and down
On the rear side of the lower reader and the upper reader, a guide rail for guiding a sliding holder provided at the tip of the backstay in the longitudinal direction of the reader is provided in a continuous state, respectively.
Locking means for fixing the position of the sliding holder in the longitudinal direction of the reader by detachably locking the sliding holder with the lower locking portion provided on the lower reader and the upper locking portion provided on the upper reader. Provided,
In the transport state, the back stay is shortened, the locking means is locked to the lower locking portion of the lower reader from which the upper reader is removed, and the lower reader is erected vertically. age,
In the working state, the upper leader is connected to the upper end of the lower leader which is locked by the locking means and is erected in the vertical direction, and the back stay is extended to attach the sliding holder. The reader is erected in the vertical direction by being raised along the guide rail and locking the locking means to the upper locking portion of the upper reader. Pile driver. The base machine front lower than the front bracket, the傾規system member before the reader rear regulates the anteversion angle in contact with a reader when tilted forward the reader is provided, the transport state pile driver the When switching to the working state, the back stay is slightly extended while the locking means is locked to the lower locking portion, the reader is tilted forward, and the lower rear surface of the lower reader is After contacting the front surface of the forward tilt restricting member and bringing the reader into a forward tilted state, the locking state with the lower locking portion of the locking means is released, and the back stay is extended to The pile driving machine according to claim 1 , wherein the sliding holder is raised along the guide rail . The sliding holder includes slide portions that are slidably engaged with the guide rails on both sides of the front surface of the holder substrate, and a front end of the backstay is rotatably connected to both sides of the rear surface of the holder substrate. Each of the shaft holders is provided with a center portion on the rear surface of the holder substrate, and the lower locking portion and the upper locking portion respectively provided at predetermined positions on the rear surface of the lower reader and the upper reader. A locking pin that is the locking means that is removably locked; a guide cylinder that holds the locking pin so as to be movable in the axial direction; and a release cylinder that causes the locking pin to protrude and retract through a link; JP that a spring which holds the locking pin in the locking position via the link, and a switch for detecting the emerging state of the locking pin is provided Pile driver according to claim 1 or 2 wherein the. A method of switching the pile driver according to claim 1 from a working state to a transport state, and from a transport state to a work state,
When switching from the working state to the transport state, the locking means that is locked to the upper locking portion in the working state is released, the back stay is shortened, and the sliding holder is lowered along the guide rail When the sliding holder is lowered from the upper leader portion to a predetermined position of the lower leader, the locking means is locked to the lower locking portion, the lower leader is fixed by the back stay, and the lower reader is vertically raised. As the installed state, the upper reader is removed from the upper end of the lower reader and switched to the transport state,
When switching from the transport state to the working state, the upper leader is connected to the upper end of the lower reader in the transport state in which the locking means is locked to the lower locking portion, and the locking means and the lower locking are connected. The sliding stay is lifted along the guide rail by releasing the locking state with the part and extending the back stay, and when the sliding holder is raised to the predetermined position, the locking means is moved to the upper locking part. A method for assembling the reader , wherein the reader is placed in a working state by being vertically erected . In the transport condition, claim 4 Symbol mounting method of assembling the reader, characterized in that the working device to the lower reader is mounted. A method of switching the pile driver according to claim 2 from a working state to a transport state, and from a transport state to a work state,
When switching from the transport state to the working state, the back stay is slightly extended while the locking means is locked to the lower locking portion, the reader is tilted forward, and the lower leader The lower rear surface is brought into contact with the front surface of a forward tilt restricting member provided at the front portion of the base machine below the front bracket to bring the reader into a forward tilted state, and then the engagement with the lower locking portion of the locking means. 6. The reader assembly method according to claim 4, wherein the stopped state is released .

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