JPH101949A - Angle detector for leader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the workability of the derricking works of a leader and save the labor of the derricking works by installing a derricking angle gauge detecting the derricking angle of the leader when the leader is derricked to the leader and mounting a display means displaying the detected inclination of the derricking angle gauge into a driver's cab. SOLUTION: A leader 2 is set up to the front section of a pile driver body in a freely derricking warmer, and a derricking angle gauge detecting the derricking angle of the leader when the leader 2 is derricked between a horizontal attitude and an upright attitude is set to the leader 2. A indicator 21 is installed into a driver's cab 6, and display means 22a, 23a displaying the detected inclination of the derricking angle gauge are mounted on the indicator 21. An operator can determine the leader inclination without receiving the communication of an assistant at the driver's cab 6 by indicating the leader inclination by the indicator 21, and its own derricking and an accompanying crane can be changed over. Accordingly, the workability of the derricking works of the leader can be improved and labor for the derricking works saved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an angle detection device for a leader of a pile driver, and more specifically, to an assembly of the pile driver,
The present invention relates to a reader angle detection device when the reader is undulated for disassembly.

[0002]

2. Description of the Related Art FIGS. 6A and 6B are a side view and a front view, respectively, showing a pile driver. In the pile driver, a leader 2 is attached to a front portion of a pile driver body 1 via a pin 3. FIG. The leader 2 is supported by backstays 4 with two hydraulic cylinders 4a on the left and right mounted between the pile driver main body 1 and the leader 2, and the inclination of the leader 4 on the left, right, front and back is determined by the hydraulic cylinder 4a. It can be adjusted by stretching. The work is carried out by attaching a vertical hole excavator or a hammer for pile driving to the leader 2 by a winch mounted on the pile driver body or a lifting device (neither is shown) provided on the reader 2. is there.

In such a pile driving machine, it is necessary to hold the leader 2 in a vertical posture during general vertical pile driving work. Thus, FIG.
As shown in (B), a construction goniometer 5 having a detection range of a predetermined angle a (a is about 5 degrees) from front to back and right and left from a vertical posture.
And an operator expands and contracts the hydraulic cylinder 4a by a display 7 provided in the cab 6 so that the front, rear, left and right inclination angles become zero.

Further, this pile driving machine has an undulating winch 8 mounted on the main body 1 of the pile driving machine as a self-moving undulating device, and the undulating rope 9 which is wound and fed by the undulating winch 8 is placed on a sheave block on the A frame 10. It is configured so that it can be wrapped between the bridle 12 and the bridle 12 and the bridle 12 and the reader 2 are connected by a pendant rope 13. If the reader 2 is short, it can be raised from a horizontal position by the up-and-down winch 8. ing.

On the other hand, in the case of using the leader 2 which is too long to be lifted by the hoisting winch 8, the hook 15 of the associated crane (not shown) is connected to the leader 2 so as to stand up by itself. When the leader 2 is raised up to the angle b, the standing work by the associated crane is stopped, and the leader 2 is raised by the undulating winch 8. Then, when the lower end of the back stay 4 (the connecting portion at the tip of the rod of the hydraulic cylinder 4a) whose upper end is previously connected to the leader 2 reaches an angle c on the main body of the pile driver body 1 that can be connected to the receiving portion. By retracting the hydraulic cylinder 4a of the back stay 4, the leader 2 is raised up to the vertical position. When disassembling the pile driver, the leader 2 is defeated by going through the reverse procedure.

As described above, when raising and lowering the leader 2 in assembling and disassembling the pile driver, whether the inclination angle of the leader 2 has reached an angle at which the lifting and lowering winch 8 can perform the self-releasing operation when the leader is raised. Or, if the angle exceeds the angle at which the work can be performed by the erection winch 8 when the leader falls down,
In order for the assistant to know whether or not the angle at which the back stay 4 can be attached and detached has been reached, the undulation angle meter 1
6 is attached.

The elevation angle meter 16 is a needle type angle meter,
As shown in FIG. 9, a graduation 17 for looking at an angle range d from the state in which the reader 2 is in the horizontal posture to the time when it can be detected by the construction goniometer 5 and a predetermined angle in the front-back direction from the standing posture (for example, 7 has a graduation 18 for viewing the range of 20 degrees before and after). The graduation 18 is used for more accurately knowing the angle of the reader 2 when the reader 2 reaches an angle close to standing when the reader 2 is up and down, and FIG. As shown by the dotted chain line e, it is used when tilting the leader 2 to perform oblique pile driving.

[0008]

As described above, conventionally, an assistant monitors the elevation angle meter 16 and contacts an operator on the cab 6 to start or stop the leader elevation by himself. In addition, since it is determined whether or not the back stay 4 is to be attached or detached, there is a problem that workability is poor and an assistant is required as a liaison. In addition, while the assistant is standing near the pile driver,
When looking at the scale, it is difficult to see the accurate angle because it is difficult to see the resolution because of the mechanical configuration because it is seen from a position more than a predetermined distance. There is a problem that it takes time to connect the backstays because the lower end of the backstay does not fit the receiving portion of the pile driving machine main body when connecting to the driving machine main body.

In view of the above problems, the present invention has a structure in which the workability of the undulating work of the leader is improved, labor is saved, and the reader tilting angle can be accurately grasped so that the leaving work of the leader can be performed efficiently. An object of the present invention is to provide a reader angle detection device.

[0010]

DISCLOSURE OF THE INVENTION The present invention relates to a pile driver in which a leader is movably attached to a front portion of a pile driver main body, and the leader is erected between the horizontal posture and the standing posture. An undulation angle meter for detecting the undulation angle of the leader at the time of the operation is provided, and a display means for displaying a tilt angle detected by the undulation angle meter is provided in the cab (claim 1).

[0011] The present invention further comprises a construction angle meter for detecting the front, rear, left and right leader angles when the stakeout operation is performed by raising the leader, and the display means includes the elevation angle meter and the construction angle meter. In addition to providing common display means for displaying each detected tilt angle, a switching means is provided for switching between display of the detected tilt angle by the undulation angle meter and display of the detected tilt angle by the construction angle meter. (Claim 2). Preferably, the switching means automatically switches the display at a predetermined angle of the reader angle (claim 3).

Further, the present invention provides the undulating angle meter with a function of detecting an inclination angle at the time of slant pile driving, and a function of displaying the inclination angle at the time of slant pile driving on the display means. (Claim 4).

Further, according to the present invention, the pile driving machine raises and lowers the leader by using an associated crane at the time of assembling and disassembling, and the leader undulation by the associated crane and the leader by the self-relieving device provided for the pile driving machine. An alarm means for issuing an alarm when the inclination angle at which the switching to the up-and-down operation is performed is reached is provided (claim 5).

According to the present invention, the pile driver supports the leader by left and right back stays having hydraulic cylinders, and the rear end of the back stay and the pile driver main body are connected or disconnected. An alarm means for issuing an alarm at an enabled inclination angle is provided (claim 6).

[0015]

According to the first aspect of the present invention, the detected inclination angle of the undulation angle meter for detecting the reader inclination angle in a wide range is displayed by the display means provided in the cab, so that the operator is seated in the cab and the reader inclination angle. Can be accurately known at a close position.

According to the second aspect, when the leader inclination angle is close to vertical at the time of construction, a common display is used.
The detected inclination angle is displayed by the construction angle meter, and in the case of other reader inclination angles, it can be switched so that the detected inclination angle is displayed by the elevation angle meter.

In the third aspect, the display of the detected inclination angle by the construction angle meter and the display of the detected inclination angle by the elevation angle meter are automatically switched at a predetermined angle.

According to a fourth aspect of the present invention, the display means has a function of displaying the detected inclination angle of the sloping angle meter at the time of hitting the slanted pile. It becomes possible to know.

In the fifth aspect, when a long leader who cannot stand up and down is raised or lowered, a warning is issued by a warning means that the leader has reached a tiltable angle at which the leader can be raised or lowered or the range of the leader has fallen out of the range.

According to the present invention, when the lower end of the back stay reaches the leader inclination angle at which the lower end of the back stay is connected to or removed from the pile driver body, an alarm is issued by the alarm means.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3A is a side view of a pile driving machine showing an embodiment of an angle detector for a leader according to the present invention, and FIG. 3B is a front view thereof. 20
Is an undulation goniometer attached to the lower portion of the reader 2 according to the present invention. The undulation goniometer has the structure shown in FIG. 4 which is an enlarged cross-sectional view taken along the line EE of FIG. The undulation angle meter 20 is attached, and outputs the inclination angle before and after the reader 2, that is, the undulation angle, as an electric signal.

FIG. 1 (A) is a perspective view showing a display device 21 installed in the cab 6 in the present invention, FIG. 1 (B) is a plan view showing a display panel of the display device 21, and FIG. It is a partially expanded view of B). As shown in FIG. 1B, the display 21
Has digital display means 22a, 22b and analog display means 23a, 23b. 24 selects display contents to be displayed on these display means 22a, 22b, 23a and 23b (display contents include excavation depth, load, leader length, excavation reaction force, etc., in addition to the leader inclination angle), A key panel for inputting a set value, and 24a are switches such as a power source, an angle meter at the time of construction, and an angle meter.
When a predetermined key in the key panel 24 is operated, the display means 22a and 23a display the tilt angle of the reader 2 in the front-rear direction, and the other display means 22b and 23b display a small tilt angle range from the vertical posture to the left-right direction. The leader angle of (a range in FIG. 6B) is displayed.

The digital display means 22 in the front-back direction is also provided.
a, the analog display means 23a has a reader inclination angle of FIG.
When in the angle range of a shown in (A), the detected tilt angle of the construction angle meter 5 is displayed, and when it is in another angle range, the detected tilt angle of the undulating angle meter 20 provided by the present invention is displayed. As shown in FIG. 2, the analog display means 23a has a small inclination angle range (range a in FIG. 6A) from the vertical posture to the front-rear direction, as shown in FIG. The inclination angle display scale 25 at the time of construction for displaying the angle and a horizontal or nearly horizontal angle (30 in the illustrated example)
Degrees), the inclination angle display graduation 26 at the time of undulation and slanting pile driving, which is displayed over a wide range of 30 degrees of falling backward for slanting pile driving.
This is also used to reduce the number of parts and save space.

As shown in FIG. 1B, the display 21 has a built-in alarm 27 for generating an alarm by sound. Also,
The display 21 includes a display content support unit 28 made up of lamps, characters, and the like for indicating what the display contents of the digital display means 22a, 22b are, and analog display means 23a, 23b.
And a display content support portion 29 formed of a lamp or characters for indicating what the display content of is.

FIG. 5 shows the construction angle meter 5 and the undulation angle meter 2.
FIG. 3 is a functional block diagram for performing switching display of 0 and control for alarm generation, which is configured by an arithmetic unit attached to the display 21 or realized by an electronic circuit. In FIG. 5, reference numeral 30 indicates whether the inclination angle detected by the elevation angle meter 20 has reached the inclination angle b shown in FIG. Is the first comparison means,
When the reader inclination angle exceeds or falls below the inclination angle b, an alarm is generated by the undulating device switching alarm means 27a.

The reference numeral 31 indicates that the inclination angle detected by the undulation angle meter 20 is the inclination angle c shown in FIG. 7, that is, the lower end of the backstay 4 can be connected to or removed from the receiving portion of the pile driver body 1. This is a second comparison means for determining whether or not the power angle c has been reached, and when the leader tilt angle reaches the tilt angle c, the back stay attachment / detachment warning means 27b issues a warning. In addition, these alarm means 27a,
When the same alarm 27 is used as in the illustrated example, a continuous sound is used as one of the alarm means 27a,
It is possible to make various selections, such as using a discontinuous sound as the other alarm means 27b, or concretely reporting that the inclination angle has been reached by voice, or using an alarm device that generates different sounds. . The alarm 27 can also be used as an alarm that issues an alarm about a load or the like.

In FIG. 5, reference numeral 32 indicates whether or not the tilt angle detected by the undulation angle meter 20 is within the range of the tilt angle a (for example, a = 5 degrees) before and after the vertical posture shown in FIG. This is a third comparing means for judging, and when the leader inclination angle is within the range of the inclination angle a, the switching means 33 selects the detected inclination angle of the construction-use angle meter 5 to select the analog display means 23a and the digital display. If the tilt angle is outside the range of the tilt angle a, the tilt angle detected by the undulation angle meter 20 is displayed on these display means 23a and 22a. By automating the switching of the display in this manner, the trouble of switching is eliminated, and the trouble of switching is eliminated.

As described above, by displaying the leader inclination angle on the display 21, the operator can know the leader inclination angle without being contacted by an assistant while in the operator's cab 6. Whether the erection winch 8 is actuated to switch to standing, or the sloping winch 8 is collapsed to a companion crane, or the leader 2 is connected to the pile lowering machine main body 1 while the leader 2 is undulating. It is possible to know whether or not the inclination angle has been reached or removed, so that an assistant for informing the inclination angle is not required.
Further, since the display 21 is provided in the operator's cab 6, the operator can see from a close position, can accurately grasp the reader inclination angle, switch between self-relief and accompanying crane, and operate the backstay. Connection and disconnection can be performed at an optimum reader inclination angle. In particular, the digital display means 22a
By digitally displaying the reader tilt angle,
It is possible to more accurately grasp the leader inclination angle.

Further, the alarm means 27a, 27b informs the operator that the predetermined leader inclination angles b, c have been reached, so that the operator can more reliably switch the leader's own undulation and the associated crane. The back stay can be connected and disconnected. Further, in the present embodiment, since the leader inclination angle in the slanted pile driving is also displayed on the display 21, it is not necessary to tilt the leader with the help of the assistant even in the slanted pile driving.

In the case where the reader is provided with an alarm means, if the reader is short and the reader can be raised and lowered by itself,
Since it is not necessary to generate an alarm for switching between the associated crane and the undulating winch, the presence or absence of the alarm may be determined by the leader length input by the key panel 24.

[0031]

According to the first aspect of the present invention, the leader inclination angle at the time of raising and lowering the leader is displayed in the driver's cab, so that the operator can stay in the driver's cab without receiving the communication from the assistant. You can know the leader tilt angle at the time,
The workability of raising and lowering the reader is improved, and no assistant is required to inform the reader's tilt angle. This saves labor and allows the reader's tilt angle to be seen at a close position, so it can be accurately grasped. It is possible to perform the leader up-and-down operation efficiently.

According to claim 2, as the display means,
Along with providing a common display means also used to display the detected inclination angle of the undulation angle meter and the construction angle meter, display of the detected inclination angle by the undulation angle meter, and display of the detected inclination angle by the construction angle meter. Since the switching means is provided, it is possible to reduce the number of display means and save space.

According to the third aspect, the display of the detected tilt angle by the undulation angle meter and the display of the detected tilt angle by the construction angle meter are automatically switched at a predetermined angle.
The trouble of switching is not required, and the trouble of switching is eliminated.

According to a fourth aspect of the present invention, the undulation angle meter has a function of detecting a tilt angle at the time of oblique pile driving, and the display means has a function of displaying the tilt angle at the time of oblique pile driving. Since the operator can know the leader inclination angle without the need for an assistant even in the case of oblique pile driving, the number of parts for displaying the inclination angle increases even in the case of oblique pile driving. And space saving can be achieved.

According to the fifth aspect, the pile driving machine raises and lowers the leader using the companion crane at the time of assembling and disassembling, and the leader raising and lowering by the companion crane and the self-lifting device provided in the pile driver are provided. Since it is equipped with an alarm means for issuing an alarm when the tilt angle for switching with the leader undulation is reached,
It is easy for the operator to confirm that the inclination angle for switching has been reached.

According to claim 6, the pile driver supports the leader by left and right back stays having hydraulic cylinders, and connects or disconnects the rear end of the back stay and the pile driver body. Since an alarm means for issuing an alarm is provided at the tilt angle that allows the operator, it is easy for the operator to confirm that the tilt angle for connecting and disconnecting the backstay with the main body of the pile driver has been reached.

[Brief description of the drawings]

FIG. 1A is a perspective view showing an installation example of an indicator in a driver's cab in the present invention, and FIG. 1B is a plan view showing an example of a display panel of the indicator.

FIG. 2 is a partially enlarged view of FIG. 1 (B).

FIG. 3A is a side view of a pile driver showing an embodiment of an angle detector of a reader according to the present invention, and FIG. 3B is a front view thereof.

FIG. 4 is an enlarged sectional view taken along line EE of FIG. 3 (B).

FIG. 5 is a functional block diagram of an embodiment of a reader angle detecting device according to the present invention.

FIG. 6 (A) is a side view of a conventional pile driver, and FIG. 6 (B) is a front view thereof.

FIG. 7 is a side view for explaining a leader raising / lowering operation of the pile driver.

FIG. 8 is an enlarged view of the undulation angle meter of FIG. 6 (A).

FIG. 9 is a side view showing the measurement ranges of the undulation angle meter and the construction angle meter of the pile driver.

[Explanation of symbols]

1: Pile driver body, 2: Leader, 3: Pin, 4: Back stay, 4a: Hydraulic cylinder, 5: Construction angle meter, 6: Operator's cab, 8: Up / down winch, 9: Up / down rope, 10: A Frame, 11: sheave block, 12: bridle, 1
3: Pendant rope, 15: Hook of companion crane,
Reference numeral 20: undulation angle meter, 21: display, 22a: digital display means (front-rear inclination angle), 22b: digital display means (left-right inclination angle), 23a: analog display means (front-rear inclination angle), 23b: analog display means ( Left and right tilt angle), 2
4: Key panel, 25: Display of inclination angle at the time of construction, 26:
Scale for displaying tilt angle when undulating and driving piles, 27: alarm device, 2
7a: undulating device switching warning means, 27b: back stay attachment / detachment warning means, 30 to 32: comparison means, 33: switching means

Claims (6)

[Claims] 1. A pile driver in which a leader is attached to a front portion of a pile driver main body so as to be able to undulate, wherein the leader detects a leader undulation angle when the leader is raised and lowered between a horizontal posture and a standing posture. An angle detection device for a reader, comprising: a undulation angle meter for displaying a tilt angle detected by the undulation angle meter in a driver's cab. 2. The construction angle meter according to claim 1, further comprising a construction angle meter for detecting front, rear, left and right leader angles when the leader is erected and pile driving work is carried out, and the undulation angle meter and the construction angle are provided as the display means. In addition to providing common display means for displaying each detected tilt angle of the meter, a switching means is provided for switching between the display of the detected tilt angle by the undulation angle meter and the display of the detected tilt angle by the construction angle meter. Characteristic reader angle detector. 3. The reader angle detecting device according to claim 2, wherein the switching means automatically switches the display at a predetermined angle of the reader angle. 4. The tilt angle meter according to claim 1, which has a function of detecting a tilt angle at the time of oblique pile driving, and the display means has an inclination at the time of oblique pile driving. An angle detection device for a reader having a function of displaying a corner. 5. The pile driving machine according to claim 1, wherein the pile driving machine raises and lowers the leader using an associated crane at the time of assembly and disassembly. A reader angle detecting device, comprising: an alarm unit for issuing an alarm when an inclination angle at which switching to leader raising / lowering by a self-relief device is provided is reached. 6. The pile driver according to claim 1, wherein the pile driver supports the leader with left and right back stays having hydraulic cylinders, and a rear end of the back stay and the pile driver. An angle detecting device for a reader, characterized by comprising an alarm means for issuing an alarm at an inclination angle which can be connected to or disconnected from a main body.