JP6706511B2 - Digging pillar car - Google Patents

Description

The present invention relates to a digging column truck, and in particular, changes an engagement partner of an engaging portion arranged at a base end portion of an auguscru between a moving boom and a base boom according to an orientation of the aguscru. Regarding digging column car.

BACKGROUND ART Generally, a digging column vehicle has an August cru attached to a telescopic boom, and digs a hole in the ground by pressing the tip of the August cru against the ground and rotating it. The August cru is configured so that it can be changed between a working posture that is hung from the telescopic boom and a storage posture that is along the telescopic boom, and an engaging portion that engages with the telescopic boom is arranged at the base end portion thereof. By engaging this engaging portion with the top boom when the August crucible is in the working posture, the August cruc can be moved as the telescopic boom expands and contracts. In addition, by engaging the engaging portion with the base boom when the augus cru is in the retracted posture, it is possible to extend and retract the telescopic boom while fixing the augus cru to the base boom.

As described above, in the digging column vehicle, since both the August cru and the telescopic boom operate in association with each other, it is required to surely perform each operation.
Therefore, for example, Patent Document 1 proposes an auger storage safety device for ensuring safety when storing an auger. This auger storage safety device restricts the storage of the auger when the boom is not in the fully retracted state, so the auger can be stored in the fully retracted boom, and the auger interferes with parts such as stays during storage. Can be suppressed.

Japanese Utility Model Publication No. 3-21492

However, even if the auger screw is properly placed in the retracted posture as in the safety device for storing an auger of Patent Document 1, there is a possibility that the extension operation of the telescopic boom thereafter may be hindered. For example, when the tip end portion of the August cruc moves downward due to slackening of the wire rope that winds up the August cruc, the engaging section may be engaged with the top boom while the Aug cruc is in the retracted posture. When the telescopic boom is extended in this state, the augus screw may move together with the top boom, and the auger screw may come into contact with, for example, the storage support portion arranged so as to surround the augus screw in the retracted posture.

The present invention has been made to solve such conventional problems, and an object of the present invention is to provide a digging column vehicle that reliably switches the operation between the August cru and the telescopic boom. .

A digging pillar vehicle according to the present invention includes a telescopic boom having a traveling vehicle, a swivel provided on the upper side of the traveling vehicle, a base boom attached to the swivel, and a movable boom that slides with respect to the base boom. The August crucible having a long shape and a base end attached to the telescopic boom, and a work position in which the tip extends toward the ground and a retracted attitude in which the tip extends toward the base of the telescopic boom. According to the posture of the auger screw, it is arranged at the base end of the auger screw so as to be engageable with the telescopic boom, engages with the moving boom in the working posture, and engages with the base boom in the retracted posture. Fluctuating engaging part, attitude detecting part for detecting whether or not the August crucible is in the retracted position, engagement detecting part for detecting the mating partner of the engaging part, and attitude of the August crucible in the attitude detecting part Is detected, and when the engagement detection unit detects the engagement between the engagement unit and the moving boom, the stop unit operates to stop the extension of the telescopic boom.

Here, it is preferable to have an operation detection unit for detecting whether or not stretched or squeezed boom is extended operation.

Further, the storage unit further includes a storage support unit that is disposed on the base boom and is formed to surround the August cruise that is in the storage posture, and the posture detection unit detects whether the August cruise is stored in the storage support unit. be able to.

In addition, the stop unit may include an alarm unit that warns an operator who performs an extension operation of the telescopic boom to stop the operation.

Further, the stop portion may have an unload valve that unloads the hydraulic oil supplied to the telescopic boom to forcibly stop the extension operation of the telescopic boom.

According to this invention, when the engagement between the engaging portion and the movable boom is detected in the detecting portion that detects the engagement partner of the engaging portion when the telescopic boom is extended with the auger screw in the retracted posture, the stop portion extends and contracts. Since it operates so as to stop the extension of the boom, it is possible to provide a digging column vehicle that reliably switches the operation between the August cruc and the telescopic boom.

It is a figure which shows the structure of the excavation building column car which concerns on one embodiment of this invention. It is a figure which shows the structure of an August Cru. It is a figure which shows the structure of an engaging part. It is a figure which shows the structure of a storage support part. It is a figure which shows the structure of an alarm part. It is a figure which shows the structure of a stop part.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows the structure of a digging column vehicle according to an embodiment of the present invention. This digging column vehicle is along a traveling vehicle 1, a swivel base 2 provided on the upper side of the traveling vehicle 1, a telescopic boom 3 movably attached to the swivel base 2, and a side portion of the telescopic boom 3. The auger screw 4 arranged as described above, the hydraulic circuit portion 5 arranged near the swivel base 2, and the operation portion 6 are provided.

The traveling vehicle 1 has a cab arranged at a front portion of the vehicle, wheels for traveling on a road, and an outrigger for supporting the vehicle.
The swivel base 2 is provided so as to be swivelable with respect to the traveling vehicle 1, and a telescopic boom 3 is attached near the upper part thereof.

The telescopic boom 3 is arranged so as to extend from the swivel base 2 toward the rear of the vehicle and is configured to be telescopic. Specifically, the telescopic boom 3 has a base boom 7 whose root part is attached to the swivel base 2 so as to be capable of undulating, and a moving boom 8 which slides with respect to the base boom 7. Further, the moving boom 8 has an intermediate boom 9 and a top boom 10. The base boom 7, the intermediate boom 9, and the top boom 10 have a cylindrical shape and are arranged so as to be sequentially located on the inner side, and when the intermediate boom 9 and the top boom 10 slide with respect to the base boom 7, they expand and contract. The boom 3 is expanded and contracted.

The August cru 4 has a long shape, and its base end is attached to the tip side of the telescopic boom 3.
The hydraulic circuit unit 5 is connected to a drive unit such as a hydraulic motor and a hydraulic cylinder built in the swivel base 2, the telescopic boom 3 and the auger screw 4, and supplies hydraulic oil to the drive unit to rotate the swivel base 2 and the telescopic unit. The boom 3 and the August cru 4 are operated.
The operation unit 6 is used by an operator to operate the swivel base 2, the telescopic boom 3, and the auger screw 4, and is arranged between the cab and the swivel base 2 so as to face the vehicle rear side.

FIG. 2 shows the structure of the August cruc 4 in detail.
The auger screw 4 has a mounting portion 11 for mounting the base end portion to the telescopic boom 3, a rotation drive portion 12 arranged near the base end portion, a widening portion 13 arranged near the middle portion, and a widening portion 13. And a screw portion 14 formed so as to spirally extend from the vicinity of the intermediate portion toward the tip end portion.
The mounting portion 11 is configured such that the base end portion of the auger screw 4 rotates about a horizontal axis orthogonal to the telescopic boom 3. As a result, the auger screw 4 can be changed into a storage posture P1 in which the tip portion extends toward the base portion of the telescopic boom 3 and a work posture P2 in which the tip portion extends toward the ground. The mounting portion 11 is slidably mounted on the moving boom 8.

The rotation drive unit 12 is connected to the hydraulic circuit unit 5 and rotates the auger screw 4 around itself.
The wire fixing portion 13a is for fixing the wire W extending from the base boom 7 when the auger screw 4 is in the storage posture P1. By fixing the wire W to the wire fixing portion 13a and rotating the auger screw 4, the wire W is wound around the auger screw 4 and gradually shortened, so that the auger screw 4 is pulled up from the working posture P2 to the retracted posture P1. ..
The widened portion 13 is for winding the wire W around the auger screw 4 when the auger screw 4 is in the storage posture P1, and is formed in a brim shape so as to expand the outer diameter dimension of the auger screw 4 to the outside. Since the wire W is wound around the auger screw 4 while being in contact with the widened portion 13, the wire W can be collectively wound around the front portion of the widened portion 13.

Further, an engaging portion 15 formed so as to be engageable with the telescopic boom 3 is arranged at a base end portion of the auger screw 4, and a side portion of the base boom 7 corresponds to the widening portion 13 of the auger screw 4. The storage support part 16 is arranged. In addition, a stop portion 17 that operates to stop the extension operation of the telescopic boom 3 is arranged in the operation portion 6.
Further, the engagement detection unit 18a is arranged near the engagement unit 15, the posture detection unit 18b is arranged in the storage support unit 16, and the operation detection unit 18c is arranged in the operation unit 6. Accordingly, the engagement partner of the engagement portion 15 when the telescopic boom 3 is extended with the auger screw 4 in the retracted posture P1 is detected.

As shown in FIG. 3, the engagement portion 15 is arranged so as to extend from the top boom 10 to the base boom 7, and has both end portions 19a and 19b formed in a hook shape. In addition, in FIG. 3, it is shown without the August screw 4.
The engaging portion 15 is attached to the mounting portion 11 of the auger screw 4 so that both ends 19a and 19b swing vertically according to the posture of the auger screw 4, and the auger screw 4 is set to the working posture P2. The end portion 19a engages with the fixing pin 20a fixed to the top boom 10, and the end portion 19b engages with the fixing pin 20b fixed to the base boom 7 when the auger screw 4 is in the retracted posture P1. .. That is, the engaging portion 15 has the end portion 19a biased upward so as to engage with the fixing pin 20a, and is attached as the auger screw 4 is changed from the working posture P2 to the storage posture P1. The push-up portion 11a arranged on the portion 11 pushes up the end portion 19b side of the engaging portion 15 from the lower side so that the end portion 19b is engaged with the fixing pin 20b.

In this way, the end portion 19a of the engaging portion 15 is engaged with the fixed pin 20a in the work posture P2, so that the mounting portion 11 is moved together with the top boom 10 in the telescopic direction of the telescopic boom 3. On the other hand, the mounting portion 11 is fixed to the base boom 7 by engaging the end portion 19b of the engaging portion 15 with the fixing pin 20b in the retracted posture P1, and only the top boom 10 moves as the telescopic boom 3 extends and contracts. To be done.

The engagement detection unit 18a detects an opponent of the moving boom 8 and the base boom 7 with which the engagement unit 15 engages, and can be configured by, for example, a photoelectric switch that can be arranged in a narrow range. The engagement detecting portion 18a is arranged on the end portion 19b side of the engaging portion 15 and detects whether the end portion 19b of the engaging portion 15 is engaged with the fixing pin 20b. When the end portion 19b of the engaging portion 15 is not engaged with the fixing pin 20b, the engagement between the end portion 19a of the engaging portion 15 and the fixing pin 20a is detected.

As shown in FIG. 4, the storage support portion 16 is formed so as to project to the side of the base boom 7, and has a recess 16 a that is cut out upward at the lower edge portion thereof. The concave portion 16a is formed corresponding to the August screw 4, and the August screw 4 having the storage posture P1 is disposed in the concave portion 16a and accommodates the August screw 4 so as to surround the August screw 4.
The posture detection unit 18b detects whether or not the auger screw 4 is in the storage posture P1, and can be configured by, for example, a limit switch. The posture detection unit 18b has a detection plate 21 arranged in the storage support unit 16 in the vicinity of the recess 16a so as to correspond to the widened portion 13 of the auger screw 4. It is detected that the auger screw 4 stored in the storage support part 16 is detected by the detection plate 21 being pushed toward the base boom 7 side by the widening part 13 when the auger screw 4 in the storage position P1 enters the recess 16a. To be done. That is, the posture detection unit 18b detects whether the August claw 4 is in the storage posture P1 based on whether it is stored in the storage support unit 16.

The operation detection unit 18c detects whether or not the telescopic boom 3 has been extended, and can be configured by, for example, a limit switch. As shown in FIG. 2, the operation detection unit 18c is connected to the operation lever 6a for extending and retracting the telescopic boom 3 in the operation unit 6, and detects whether or not the extension operation is performed by detecting the movement of the operation lever 6a. To detect.
In the stop portion 17, the posture detecting portion 18b and the operation detecting portion 18c detect an operation of extending the telescopic boom 3 with the auger screw 4 in the stored posture P1, and further, the engagement detecting portion 18a detects the engagement portion 15 and the top boom 10. The extension operation of the telescopic boom 3 is stopped when the engagement is detected. The stop unit 17 has an alarm unit 22 and an unload valve 23.

The alarm unit 22 urges the operator who performs the extension operation of the telescopic boom 3 to stop the operation by an alarm, and is arranged so as to face the seat on which the operator sits. As shown in FIG. 5, the alarm unit 22 includes an alarm buzzer 22a that alerts the operator with a buzzer so as to stop the operation, and the engaging portion 15 engages the base boom 7 with respect to the operator. There is an indicator light 22b for notifying the presence of light.
The unload valve 23 unloads the hydraulic oil supplied from the hydraulic circuit unit 5 to the telescopic boom 3 to forcibly stop the extension operation of the telescopic boom 3, and operates on the telescopic boom 3 in the hydraulic circuit unit 5. It is located in the oil supply channel.

FIG. 6 illustrates an example of the control circuit of the stop unit 17.
The stop unit 17 has an engagement detection switch 24a connected to the engagement detection unit 18a, an attitude detection switch 24b connected to the attitude detection unit 18b, and an operation detection switch 24c connected to the operation detection unit 18c. The engagement detection switch 24a, the attitude detection switch 24b, the operation detection switch 24c, the alarm buzzer 22a, the unload valve 23, and the indicator light 22b are connected in parallel to the power source. The stop unit 17 includes a relay unit R1 connected in series to the attitude detection switch 24b, a relay unit R2 connected in series to the operation detection switch 24c, a relay unit R3 connected to the engagement detection switch 24a, and It has R4 and a relay section R5 connected in parallel to the alarm buzzer 22a.

The posture detection switch 24b is turned on and off in response to the detection by the posture detection unit 18b, and is turned off when the posture detection unit 18b detects that the augus screw 4 is in the storage posture P1, while it is turned off. It is turned on when it is not detected that 4 is the storage posture P1.
The operation detection switch 24c is switched on and off in response to the detection of the operation detection unit 18c, and is turned on when the operation detection unit 18c detects that the telescopic boom 3 has been extended and operated, while the operation detection switch 24c is turned on. When it is not detected that the extension operation has been performed, it is turned off.
The engagement detection switch 24a is switched on and off in response to detection by the engagement detection unit 18a, and is turned on when the engagement detection unit 18a detects engagement between the engagement unit 15 and the base boom 7. On the other hand, when the engagement between the engagement portion 15 and the base boom 7 is not detected, that is, when the engagement between the engagement portion 15 and the top boom 10 is detected, it is turned off.

The relay unit R1 has a relay switch 25 connected to the alarm buzzer 22a, and turns on the relay switch 25 when the posture detection switch 24b is off, and turns off the relay switch 25 when the posture detection switch 24b is on. To do.
The relay unit R2 has a relay switch 26 connected to the alarm buzzer 22a, and turns off the relay switch 26 when the operation detection switch 24c is off, while turning on the relay switch 26 when the operation detection switch 24c is on. To do.

The relay units R3 and R4 are connected in parallel with each other, the relay unit R3 has a relay switch 27 connected to the alarm buzzer 22a, and the relay unit R4 has a relay switch 28 connected to the indicator light 22b. The relay part R3 turns on the relay switch 27 when the engagement detection switch 24a is off, and turns off the relay switch 27 when the engagement detection switch 24a is on. Similarly, the relay unit R4 turns on the relay switch 28 when the engagement detection switch 24a is off, and turns off the relay switch 28 when the engagement detection switch 24a is on.

The relay section R5 has a relay switch 29 connected to the unload valve 23, and turns on the relay switch 29 when at least one of the relay switches 25, 26 and 27 is off, while the relay switch 25, 26 and When 27 is on, the relay switch 29 is turned off.
The stop unit 17 also includes a normally open contact release switch 30 connected in parallel with the relay switch 29.

Next, the operation of this embodiment will be described.
First, in the digging column vehicle shown in FIG. 1, the telescopic boom 3 is raised and the auger screw 4 is hung from the telescopic boom 3 to be in the working posture P2. At this time, since the engaging portion 15 is engaged with the fixing pin 20a on the side of the top boom 10, the auger screw 4 can be moved according to the extension and contraction of the telescopic boom 3. Then, the tip of the auger screw 4 is pressed against the ground, and the auger screw 4 is rotated by the rotation driving unit 12. As a result, as the tip of the auger screw 4 advances into the ground, the screw part 14 sequentially carries the ground soil upward so that a hole can be dug in the ground.

When the digging work on the ground is completed, the auger screw 4 is rotated by the mounting portion 11 to change the posture from the working posture P2 to the storing posture P1, as shown in FIG. With this posture change, as shown in FIG. 3, the engaging portion 15 has the base boom 7 side pushed up from below by the push-up portion 11a, and the end portion 19a on the top boom 10 side moves downward and the base portion The end portion 19b on the boom 7 side moves upward. As a result, the engaging portion 15 releases the engagement with the fixing pin 20a and is engaged with the fixing pin 20b on the base boom 7 side.
Further, the August cru 4 is stored in the recess 16a of the storage support portion 16 as shown in FIG.

At this time, the engagement between the engagement portion 15 and the base boom 7 is detected by the engagement detection portion 18a, and the attitude detection portion 18b detects that the auger screw 4 is in the storage posture P1. As a result, in the stop portion 17 shown in FIG. 6, the engagement detection switch 24a is turned on and the attitude detection switch 24b is turned off. The operation detection switch 24c is turned off because the operation detection unit 18c has not detected the extension operation of the telescopic boom 3. In this way, when the engagement detection switch 24a is turned on, the relay section R3 and the relay section R4 connected to the engagement detection switch 24a turn off the relay switch 27 and the relay switch 28, respectively. Further, when the posture detection switch 24b is turned off, the relay section R1 connected to the posture detection switch 24b turns on the relay switch 25.

Then, when moving to crane work, the operation lever 6a of the operation part 6 is extended and the telescopic boom 3 is extended. At this time, since the engaging portion 15 does not engage with the top boom 10 but engages with the base boom 7, only the top boom 10 is telescopically moved while the auger screw 4 is fixed to the base boom 7. be able to.
The extension operation of the operation lever 6a is detected by the operation detection unit 18c, and the operation detection switch 24c of the stop unit 17 is turned on. Then, the relay switch 26 is turned on by the relay section R2 connected to the operation detection switch 24c.

Here, while the relay switch 25 and the relay switch 26 are turned on, while the relay switches 27 and 28 are turned off, the alarm buzzer 22a, the unloading valve 23 and the indicator light 22b are not activated, and the operation lever 6a is operated. The extension operation of the telescopic boom 3 can be performed normally.
However, when the crane operation is started, there is a possibility that the engagement portion 15 engages with the top boom 10 in a state where the auger screw 4 is in the storage posture P1. For example, as shown in FIG. 2, when the wire rope that supports the August crucible 4 in the retracted posture P1 is loosened, the August clue 4 rotates downward from the retracted posture P1 to the retracted posture P1a, as shown in FIG. The engagement part 15 may release the engagement with the base boom 7 and engage with the top boom 10. In general, it is difficult for an operator who operates the operating portion 6 to visually recognize the engagement state of the engaging portion 15, and conventionally, the engaging portion 15 expands and contracts while being engaged with the top boom 10. The boom 3 may be extended to damage the storage support 16 and the like.

Therefore, by detecting the engagement state of the engagement portion 15 by the engagement detection portion 18a, it is possible to reliably switch from operating the auger screw 4 to operating the telescopic boom 3. That is, when the engagement detection unit 18a detects the engagement between the engagement unit 15 and the top boom 10, the engagement detection switch 24a of the stop unit 17 is turned off. Then, the relay switch 27 and the relay switch 28 are turned on by the relay part R3 and the relay part R4 connected to the engagement detection switch 24a.
In this way, when the relay switch 25, the relay switch 26, and the relay switch 27 are turned on, the alarm buzzer 22a is energized, and the operator is warned by the buzzer to stop the extension operation of the operation lever 6a. It Further, when the relay switch 28 is turned on, the indicator light 22b is also energized, and the operator is made to recognize that the engagement portion 15 is engaged with the top boom 10.

Further, when the relay switch 25, the relay switch 26, and the relay switch 27 are turned on, the relay switch 29 of the relay section R5 is turned off. Then, the unload valve 23 connected to the relay switch 29 returns the hydraulic oil supplied to the telescopic boom 3 to the tank, and the extension operation of the telescopic boom 3 is forcibly stopped.

In this way, when the telescopic boom 3 is extended while the August claw 4 in the retracted posture P1 is engaged with the top boom 10 via the engaging portion 15, the stop portion 17 stops the extension operation of the telescopic boom 3. Since it operates so as to cause the damage, the storage support portion 16 and the like can be prevented from being damaged.
When the crane work is desired again, the release switch 30 of the stop portion 17 is turned on to release the stop by the unload valve 23 and the extension operation of the telescopic boom 3 can be performed.

According to the present embodiment, the posture detection unit 18b and the operation detection unit 18c detect that the telescopic boom 3 is extended with the auger screw 4 in the storage posture P1a, and the engagement detection unit 18a engages with the engagement unit 15 and the top boom. When the engagement with 10 is detected, the stop portion 17 operates so as to stop the extension operation of the telescopic boom 3, so that the operation can be reliably switched between the auger screw 4 and the telescopic boom 3. it can.

In the above embodiment, the stop unit 17 is composed of a control circuit as shown in FIG. 6, but the stop unit 17 expands and contracts based on the detection results of the engagement detection unit 18a, the posture detection unit 18b, and the operation detection unit 18c. The boom is not limited to this as long as it can operate so as to stop the extension of the boom. For example, the stopping unit 17 can be configured by a CPU and an operation program for causing the CPU to perform various processes.

In addition, in the above-described embodiment, the engagement detecting portion 18a is arranged on the end portion 19b side of the engaging portion 15, but the engagement part 15 of the moving boom 8 and the base boom 7 with which the engaging portion 15 engages. It suffices to be able to detect, but not limited to this. For example, the engagement detection unit 18a may be arranged on the end 19a side of the engagement unit 15 to detect whether the end 19a of the engagement unit 15 is engaged with the fixing pin 20a.

1 traveling vehicle, 2 swivel base, 3 telescopic boom, 4 August cruc, 5 hydraulic circuit section, 6 operating section, 6a operating lever, 7 base boom, 8 moving boom, 9 intermediate boom, 10 top boom, 11 mounting section, 11a Push-up part, 12 rotation drive part, 13 widening part, 13a wire fixing part, 14 screw part, 15 engagement part, 16 storage support part, 16a recessed part, 17 stop part, 18a engagement detection part, 18b posture detection part, 18c Operation detecting section, 19a, 19b End of engaging section, 20a, 20b fixing pin, 21 detecting plate, 22 alarm section, 23 unloading valve, 24a engagement detecting switch, 24b attitude detecting switch, 24c operation detecting switch, 25 , 26, 27, 28, 29 relay switch, 30 release switch, P1, P1a retracted posture, P2 working posture, W wire, R1, R2, R3, R4, R5 relay section.

Claims (5)

Traveling vehicle,
A swivel base provided on the upper side of the traveling vehicle,
A telescopic boom having a base boom attached to the swivel base and a moving boom that slides with respect to the base boom;
An August crucible having a long shape and having a base end portion attached to the telescopic boom, and a tip end portion extending toward the ground and a storage posture in which the tip end portion extends toward the base portion of the telescopic boom. When,
The auger screw is arranged at a base end portion of the auger screw so as to be engageable with the telescopic boom, and is engaged with the movable boom in the working posture and with the base boom in the retracted posture. An engaging portion that changes according to the posture of
A posture detection unit that detects whether or not the August cruc is in the storage posture,
Engaging detector for detecting the engagement counterpart before Kigakarigo portion,
When the posture detecting unit detects the retracted posture of the August cruc, and when the engagement detecting unit detects the engagement between the engaging unit and the movable boom, the extension of the telescopic boom is stopped. A digging column vehicle with a stop that operates. Hole drilling Kenbashira vehicle according to claim 1 having an operation detection unit for detecting whether or not a pre-SL telescopic boom extending operation. Further comprising a storage support portion arranged on the base boom and formed so as to surround the Augustcru in the storage posture,
The digging column vehicle according to claim 2, wherein the posture detection unit detects whether or not the August cruc is stored in the storage support unit. The digging column vehicle according to any one of claims 1 to 3, wherein the stop portion has an alarm portion that gives an alarm to an operator who performs an extension operation of the telescopic boom so as to stop the operation. The hole according to any one of claims 1 to 4, wherein the stop portion includes an unload valve that unloads hydraulic oil supplied to the telescopic boom to forcibly stop the extension operation of the telescopic boom. Excavation pillar car.

Images