JPH07237888A - Method and device for automatically projecting and housing auxiliary jib for crane - Google Patents

Abstract

PURPOSE:To securely, safely and quickly project and house an auxiliary jib by projecting an auxiliary jib with the force generated between a boom and the auxiliary jib at the time of projecting the auxiliary jib, and thereafter, taking measures to engage the auxiliary jib with the side surface side near the tip of the boom. CONSTITUTION:An automatic projecting and housing device 10 is formed of a rotating bracket part 30 for bringing an auxiliary jib 6 near a top boom 5 and for separating them, a lateral holding device 20 to be driven by a hydraulic device to oscillate the auxiliary jib 6 in the lateral direction, plural lock devices 40, 60 for locking the top boom 5 with the rotating bracket 30, and a rotating device 50 for rotating the rotating bracket part 30 to the boom. At the time of projecting the auxiliary jib 6, the auxiliary jib 6 is projected by the force generated between the boom 5 and the auxiliary jib 6, and thereafter, the auxiliary jib 6 is engaged with the side surface side near the tip of the boom at the time of parallel arrangement. The rotating bracket part 30 is projected forward of the boom by the turning force to the boom to engage the auxiliary jib 6 with the side surface side far from the tip of the boom.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary jib projecting and retracting method for a boom device in a vehicle-mounted crane and a retracting device.

[0002]

2. Description of the Related Art FIG. 1 is a side view of a traveling posture of a vehicle-mounted crane (rough terrain crane), and FIG. 2 is a plan view thereof. An upper swing body 2 equipped with a driver's cab 3 mounted on a vehicle body 1 is provided with a boom 4 that expands and contracts in multiple stages so that it can be raised and lowered. ing. At this time, the auxiliary jib 6 attached to the tip of the top boom 5 of the boom 4 is stored in parallel with the side surface of the boom 4. At the time of work, as shown in FIG. 3, the auxiliary jib 6 is extended to the tip of the top boom 5, and the boom 4 is arbitrarily expanded and contracted and undulated to perform the work. There are various methods for projecting and storing the supplementary jib 6, and as an example, there is JP-B-4-6640. According to this proposal, when the stored auxiliary jib is extended, the storage pin is first pulled out, then the auxiliary jib is swung out, the fulcrum pin is inserted, and then the extension set pin is free. Next, set the boom to a predetermined hoisting angle, then tilt the auxiliary jib to a position almost parallel to the axis of the fulcrum pin, then rotate the auxiliary jib with an auxiliary winding winch, and then insert the connecting pin. Then, the overhanging work is completed.

[0003]

However, according to the above method, since the auxiliary jib is rotated by the wire using the auxiliary winding winch, it is necessary to change the auxiliary winding rope in advance. , A lot of man-hours to prepare,
Need time and. Also, swinging the supplementary jib in the lateral direction,
Insertion of the fulcrum pin, freeing of the extension side set pin, and insertion of the connecting pin require manual work, which requires force, and work such as checking the pin hole position is troublesome and time-consuming, resulting in operator fatigue. Is also big. Also, interference of each part due to erroneous operation,
Or danger may occur.

The present invention has been made in view of the above problems, and relates to an auxiliary jib extension of a boom device, a storage method, and a storage device. SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and an apparatus for automatically projecting and storing a supplementary jib for a crane, which can surely and safely extend and store the supplementary jib in a short time.

[0005]

[Means for Solving the Problems] To achieve the above object,
In a first aspect of a method and a device for automatically extending a supplementary jib for a crane according to the present invention, there is provided a rotating bracket portion attached to and detached from the boom at a tip end of a boom which is mounted on a vehicle so as to be capable of elevating and lowering, and which expands and contracts in multiple stages. By providing an undulating auxiliary jib on the bracket part and rotating the rotating bracket part with respect to the boom, the auxiliary jib is projected in front of the boom during work and is stored side by side on the side surface of the boom during storage. In the method of overhanging and retracting a supplementary jib for a crane equipped with an overhanging and retracting device, at the time of overhanging the auxiliary jib, the force between the boom and the auxiliary jib causes the auxiliary jib to swing laterally to a predetermined position and overhangs. After protruding, engage the side surface near the boom tip and the auxiliary jib when installed side by side, then
The rotating bracket portion is projected to the front of the boom by the turning force with respect to the boom, and the side surface on the far side of the boom tips and the auxiliary jib when engaged in parallel are engaged with each other.

According to the second aspect of the present invention, when the auxiliary jib is stored, the side surface of the distal end of the boom which is juxtaposed and the auxiliary jib are separated from each other, and the rotating bracket portion projecting to the front of the boom is swung against the boom. The auxiliary jib is disengaged from the side surface near the tip of the boom and the auxiliary jib when they are installed in parallel after turning to a predetermined position, and the auxiliary jib is swung laterally by the force between the boom and the auxiliary jib after the separation. And store it in a predetermined position.

According to a third aspect of the present invention, when the auxiliary jib is extended, the boom is raised by a predetermined amount with respect to the first aspect of the invention, and then the auxiliary jib is moved to a predetermined position by a force between the boom and the auxiliary jib. The auxiliary jib with the side of the boom near the tip of the boom when they are juxtaposed, and then tilt the auxiliary jib downward. Engage the auxiliary jib with the side surface on the far side of the boom tip when overhanging and installed side by side.

In the fourth invention, when the auxiliary jib is retracted, the auxiliary jib is tilted downward after the boom is raised by a predetermined amount with respect to the second invention, and then the boom distal end side surface when juxtaposed. Side and the auxiliary jib are separated, and after the separation, the rotating bracket portion projecting to the front of the boom is rotated by the turning force with respect to the boom, and after the rotation to a predetermined position, the auxiliary jib is returned to the parallel position with the boom. The side surface near the tip of the boom and the auxiliary jib when separated are separated from each other, and after separation, the auxiliary jib is laterally swung by the force between the boom and the auxiliary jib and stored in a predetermined position.

In the fifth aspect of the present invention, when the supplementary jib is extended, (1) after the detection means detects that the top boom is at a predetermined shortened position, the supplemental jib is swung laterally to make the supplementary jib. For engaging work between a groove provided on one side in the left-right direction at the rear end of the rotary bracket attached to the base end of the top boom pin fixed to one side in the left-right direction at the tip of the top boom. (2) The rotation bracket and the top boom pin are locked after the detection means detects that the groove of the rotation bracket is engaged with the top boom pin, and (3) the locking of the first locking device is completed. After the detection means detects that the top boom has been extended, (4) After the detection means detects that the top boom has extended to a predetermined length, the rotation bracket is extended and (5) the rotation block is extended. After the detecting means detects that the racket has rotated to a predetermined position, each step of locking the other side in the left-right direction of the tip of the top boom and the other side in the left-right direction of the rear end of the rotating bracket with a pin Have.

In the sixth aspect of the present invention, when the auxiliary jib is stored, (1) after the detection means detects that the top boom has reached a predetermined length, the top boom is connected to the other side in the left-right direction. After unlocking the second locking device that locks the rear end of the rotation bracket with the other side in the left-right direction with a pin, and (2) after the detection means detects that the unlocking of the second locking device is completed, (3) The top boom is shortened after the rotation bracket is stored, and (3) the detection means detects that the rotation bracket has rotated to a predetermined position, and (4) the top boom is shortened to a predetermined position. After the detection means detects, the top boom pin fixed to one side in the left-right direction at the tip of the top boom is locked by engaging the groove on the one side in the left-right direction at the rear end of the rotating bracket. Unlock the locking device,
(5) After the detection means detects that the unlocking of the first lock device is completed, the method includes the steps of starting the storage of the auxiliary jib.

According to the seventh aspect of the invention, a rotating bracket portion attached to and detached from the boom is provided at the tip of a boom which is mounted on the vehicle so as to be freely movable and expands and contracts in multiple stages. By rotating the bracket portion with respect to the boom, the auxiliary jib for the crane equipped with a device for overhanging the auxiliary jib, which overhangs in front of the boom during work and is stored side by side on the side of the boom during storage. In the overhanging device, a horizontal holding device that swings the auxiliary jib laterally, a rotating bracket portion that separates or connects the auxiliary jib and the top boom, and a first locking device and a second locking device that locks the top boom and the rotating bracket portion.
It consists of a locking device and a rotating device that rotates the rotating bracket part with respect to the boom.

In an eighth aspect of the invention, which is mainly based on the seventh aspect, the first locking device and the second locking device for locking the top boom and the rotating bracket part are provided on one side in the left-right direction of the rotating bracket part. A first locking device that engages and locks the provided groove with a top boom pin fixed to one side of the top boom in the left-right direction, the other side of the rotation bracket in the left-right direction, and the other side of the top boom in the left-right direction. And a second locking device that locks the side with a pin.

In a ninth aspect of the invention, which is mainly based on the seventh aspect, the lateral holding device has a groove that engages with a pin fixed to one position of the auxiliary jib, and is swingable to one position of the boom. A mounted link, a horizontal holding cylinder that connects the boom and the link, a bracket that has a groove that engages with a pin that is fixed to another position of the auxiliary jib, and a bracket that is fixed to the other position of the boom,
The bracket is swingably mounted, and includes a hook that engages with the pin and a rod that connects the link and the hook.

In a tenth aspect of the invention, which is mainly based on the seventh aspect, a top of a rotary bracket is vertically fixed to one of the left and right sides of the base end of the top boom. A groove that engages with the boom pin is provided, and a pin hole that connects to the other side of the tip of the top boom by a connecting pin in the vertical direction is provided on the other side of the base end, and the auxiliary jib can be undulated at the tip. And a pin for mounting a rotating cylinder for rotating the rotating bracket portion with respect to the boom.

In the eleventh invention mainly consisting of the seventh invention or the eighth invention, the first locking device is swingably mounted on the rotary bracket portion, and the top boom pin is provided together with the groove of the rotary bracket portion. It is provided with a lock link that is held and a first lock cylinder that is mounted on the rotating bracket portion and that operates the lock link.

In a twelfth aspect of the invention, which is mainly based on the seventh aspect, the rotating device includes a pin fixed to the upper surface of the rear end of the rotating bracket portion, and a first lever having one end rotatably attached to the pin. , A second lever having one end rotatably attached to the other end of the first lever and a groove at the other end that engages with a rotation support pin fixed to the top boom, and the first lever and the rotation bracket are connected to each other. And a rotating cylinder.

In the thirteenth invention mainly based on the seventh invention or the eighth invention, the second locking device rotates the central part with two upper and lower connecting pins for connecting the top boom and the rotating bracket part. The lever includes a lever pivotally attached to the bracket, a second lock cylinder that connects the lever and the rotating bracket portion, and two links that connect both ends of the lever and the connecting pin.

According to a fourteenth aspect of the invention, which is mainly based on the seventh aspect, the detecting means for detecting the positions of the boom and the top boom and the detecting means for detecting the position of the horizontal holding device for swinging the auxiliary jib in the lateral direction. A detection means for detecting detachment or connection of the rotary bracket portion for detaching or connecting the supplementary jib and the top boom, and a first locking device and a second locking device for locking and unlocking the top boom and the rotating bracket portion. It comprises a detecting means for detecting locking and unlocking, and a rotational position detecting means for detecting the rotational position of the rotating device that rotates the rotating bracket portion with respect to the boom.

In a fifteenth aspect of the invention, which is mainly based on the fourteenth aspect, the display means for displaying the detection result of the detection means is provided in the cab.

In a sixteenth aspect of the present invention, which is mainly based on the seventh aspect, the boom is erected at a predetermined angle, the auxiliary jib is tilted to a predetermined position, and when the rotary bracket portion is rotated, the auxiliary jib is rotated. The position of the center of gravity is approximately on the perpendicular line passing through the center of the rotation axis of the rotation bracket portion.

In the seventeenth aspect of the present invention, the boom is mounted on the vehicle so that it can be raised and lowered, and a rotating bracket portion that is attached to and detached from the boom is provided at the tip of a boom that expands and contracts in multiple stages. By rotating the bracket portion with respect to the boom, the auxiliary jib for the crane equipped with a device for overhanging the auxiliary jib, which overhangs in front of the boom during work and is stored side by side on the side of the boom during storage. In the overhanging device, a tilt lever for performing an up-and-down operation of a supplementary jib, a direction switching valve operated by the tilt lever, a first electromagnetic switching valve for switching between a tilt operating circuit and a horizontal holding operation circuit, and a horizontal holding cylinder electromagnetic valve. Operation valve, tilt operation circuit, first lock, second lock, second electromagnetic switching valve for switching between rotation operation circuit, and first lock Includes a solenoid operated valve cylinder, a solenoid operated valve for the second lock cylinder, and a solenoid operated valve for the rotating cylinder.

In the eighteenth aspect of the invention, which is mainly based on the seventeenth aspect, one of the circuits connecting the directional control valve operated by the tilt lever and the electromagnetic operating valve for the horizontal holding cylinder and the one operated by the tilt lever are used. The one-way valve is provided in one of the circuits connecting the directional control valve and the second lock cylinder solenoid operated valve.

In a nineteenth aspect of the invention, which is mainly based on the seventeenth aspect, a first lock cylinder solenoid operated valve, a rotary cylinder solenoid operated valve, a second lock cylinder solenoid operated valve, and a second solenoid switch. The valve and are mounted on a rotating bracket.

In the twentieth aspect of the invention, which is mainly composed of the seventeenth aspect or the nineteenth aspect, a first lock cylinder solenoid operated valve, a rotary cylinder solenoid operated valve, and a second lock cylinder solenoid operated valve are provided. , And the second electromagnetic switching valve are connected by a series circuit.

[0025]

According to the above structure, the auxiliary jib for the crane is extended and stored, the rotating bracket, the lateral holding device for laterally swinging the auxiliary jib, which is operated by the hydraulic device, the top boom and the rotating bracket. Locking the 1st, 2nd
A locking device and a rotating device for the rotating bracket were provided.
A limit switch for detecting the completion of each operation is provided, and is connected to the tilt hydraulic circuit and the electromagnetic switching valve that switches between the hydraulic circuit for overhanging and retracting operation, and the electromagnetic operating valve for each hydraulic cylinder. Since the auxiliary jib is extended and stored by sequentially switching, the protruding and storing operations are automatically performed. In addition, since the operator is provided with a changeover switch for storing operation and a display means for displaying the operation detection result in the cab, by operating the changeover switch and the tilt lever while the operator confirms the detection result in the cab, Overhang,
And the storage operation can be performed.

In the extension operation from the retracted state of the supplementary jib, when the supplementary jib is oscillated in a lateral direction away from the boom, the first locking device is subsequently locked and the operator then moves the top boom. When a predetermined amount of expansion is performed,
Then, the rotating bracket is extended and rotated, and subsequently, the operation of locking the second lock device is automatically performed. In the retracting operation from the extended state of the supplementary jib, when the top boom is set to a predetermined length, the second locking device is subsequently unlocked, the rotating bracket is retracted and rotated, and then the operator moves the top boom. When shortened,
Subsequently, the operation of unlocking the first locking device and subsequently storing the auxiliary jib is automatically performed.

Further, the tilt operation hydraulic circuit is provided with a switching valve for overhanging and storing the circuit, and a one-way valve is provided between the operating valve for the horizontal holding cylinder and the directional switching valve for tilting. The lever can be used to extend it and store it. Further, since the tilt lever can be operated in one direction to extend and retract, the operational safety is increased. Further, since the electromagnetic valves of the rotating device and the first and second locking devices are attached to the rotating bracket on the tip end side where the boom and the rotating bracket rotate, the reel of the hydraulic hose can be installed in two.
There is only one, and there is less hydraulic piping in the rotating bracket. Furthermore, when the boom is erected at a predetermined angle and the auxiliary jib is tilted, the center of gravity of the auxiliary jib is almost on the perpendicular line passing through the center of the rotation axis of the rotation bracket, so the rotation torque of the rotation bracket is small. At the same time, the boom can be automatically extended with the boom kept upright at a predetermined angle, so that it can be easily and safely extended on a narrow road.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a method and an apparatus for automatically projecting and storing a crane auxiliary jib according to the present invention will be described below in detail with reference to the drawings. FIG. 4 shows the automatic overhang of the present invention,
FIG. 1 is a plan view of a vehicle-mounted crane that uses a storage device 10. An expandable multi-stage boom 4 is rotatably mounted on an upper revolving structure 2 that is mounted on a vehicle body 1 and that is equipped with a cab 3. ing. This figure shows a traveling state, and in the traveling posture viewed from the side, the boom 4 is almost horizontal or slightly tilted forward. The automatic overhanging and retracting device 10 includes a rotating bracket portion 30 for disconnecting or connecting the auxiliary jib and the top boom, a horizontal holding device 20 which is actuated by a hydraulic device and swings the auxiliary jib laterally, and a top boom 5. First locking device 40 that locks with the rotating bracket portion 30
And a second locking device 60 and a rotating device 50 for rotating the rotating bracket portion 30 with respect to the boom.

The auxiliary jib 6 mounted on the tip of the top boom 5 of the boom 4 through the rotating bracket portion 30 is stored in parallel with the boom 4 in a running state, and is fixed to the boom 4 by the storage pin 7. Has been done. During this storage,
It is supported by the horizontal holding device 20. Further, it is held by a bracket 4a fixed to the boom 4. The bracket 4a is preferably provided with rollers (not shown), bearings, etc., which reduce sliding resistance so that the bracket 4a can be easily projected. At the time of overhanging, the auxiliary jib 6 swings in the lateral direction (W direction in the drawing) by the horizontal holding device 20 as shown by the chain double-dashed line. That is, it is designed to be drawn out.

FIG. 5 is a plan view showing the structure of the horizontal holding device 20, and FIG. 5 shows the auxiliary jib 6 being swung out as shown by the chain double-dashed line in FIG. 4 and the top boom 5 being extended by a predetermined length. 2 shows a case where the engaging portion between the auxiliary jib 6 and the auxiliary jib 6 described later is released, and the auxiliary jib 6 can be rotated together with the rotating bracket portion 30. The swinging out is performed by contraction of a hydraulic cylinder 25 of the horizontal holding device 20 described later. A bracket 14 having a groove 15 at one position (upper side in the drawing) of the boom 4
Is secured to the bracket 14, and the horizontal holding cylinder 2 is attached to the bracket 14.
The bottom side of 5 is attached. Also, the bracket 14
A lever 22 having at one end a groove 23 that engages with a locking pin 21 fixed to one position of the auxiliary jib 6 is swingably mounted on the central portion by a pin 24. The other end 22a of the lever 22 is attached to the rod side of the horizontal holding cylinder 25, and connects the lever 22 and the boom 4 with the horizontal holding cylinder 25.

A bracket 16 having a groove 17 is fixed to another position of the boom 4 (lower side in the drawing). A hook 27 that engages with the locking pin 26 is swingably attached to the bracket 16 by a pin 16a. Lever 2
The other end 22a of 2 and the hook 27 are connected by a rod 28. In this extended state, the auxiliary jib 6 has the grooves 31a and 31b of the rotary bracket portion 30 which will be described later in the first position.
It is held by being engaged with the top boom pin 11 of the lock device 40.

When the top boom 5 is shortened by a predetermined length in the state of FIG. 5, the auxiliary jib 6 moves parallel to the X arrow direction as shown in FIG. 6, and the pin 21 engages with the groove 23 of the lever 22. Then, the pin 26 engages with the groove 17 of the bracket 16.
The state of FIG. 6 shows that the auxiliary jib 6 is only swung out due to the contraction of the hydraulic cylinder 25 of the horizontal holding device 20 in the E direction. Also, this state is a storable state. When the horizontal holding cylinder 25 is extended (opposite to the E direction) in the state of FIG. 6, the lever 22 rotates about the pin 24 and the auxiliary jib 6 swings about the pin 26, as shown in FIG. Is pulled toward the boom 4 side, the pin 21 engages with the groove 15 of the bracket 14, and the hook 27 also swings by the rod 28 to fix the pin 26. This state is the storage state. By inserting the pin 7 in this stored state as shown in FIG. 4, a safe traveling state can be achieved.

FIG. 8 is a plan view of the rotary bracket portion 30, and FIG. 9 is a side view of one side seen from the arrow A in FIG.
FIG. 10 is a side view of the other side as seen from the arrow B, and each shows a state in which the auxiliary jib 6 is projected to the front of the top boom 5. A top boom pin 11 and a rotation support pin 12 are provided on one side in the left and right direction of the tip of the top boom 5, that is, on the side surface on the far side of the boom tip when the auxiliary jib and the boom are juxtaposed.
Are fixed to each other, and pin holes 13 are vertically provided on the other side, that is, on the side surface near the boom tip when the auxiliary jib and the boom are juxtaposed.
a and 13b are provided. A first locking device 40 is mounted on one side surface of the rotating bracket portion 30 (FIG. 9, a side surface near the boom tip when the auxiliary jib and the boom are juxtaposed with each other), and an upper surface (FIG. 8) includes a rotating device. 50 is installed,
A second locking device 60 is attached to the other side surface (FIG. 10, the side surface on the far side of the boom tip when the auxiliary jib and the boom are juxtaposed). FIG. 11 is a perspective view of the rotating bracket portion 30, FIG.
Is a perspective view of the rotating device 50, and FIG. 13 is the first locking device 40.
FIG.

The details of each device will be described below. As shown in FIG. 11, the rotary bracket portion 30 has a groove 31a that engages with the top boom pin 11 on one side in the left-right direction on the rear end side.
31b is provided, and the pin hole 1 of the top boom 5 is provided on the other side.
Pin holes 32a and 32b are provided to fit 3a and 13b. In addition, as shown in FIG.
Is movably mounted by a pin 30a, a bracket 30b is provided in the lower portion, and a tilt cylinder 8 for movably operating the auxiliary jib 6 is mounted on the pin 30c mounted on the bracket 30b. The upper portion is provided with a pin 34 for mounting a rotary cylinder 55 that rotates the rotary bracket portion 30 with respect to the boom 4 about the top boom pin 11.

The first locking device 40 is shown in FIG.
The description will be made with reference to FIGS. 13, 14 and 15.
A lock link 41 having a recess 42 that engages with the top boom pin 11 is pivotally attached to the bracket 32 fixed to one side surface on the rear end side of the rotary bracket portion 30 so as to be swingable around a pin 43. There is. First lock cylinder 4
The rod portion of 4 is connected to the lock link 41, and the bottom portion of the first lock cylinder 44 is connected to the rotating bracket portion 30,
The lock link 41 is connected to the rotating bracket portion 30 by the first lock cylinder 44. When the first lock cylinder 44 is shortened, the lock is released as shown in FIG. 14, and when the first lock cylinder 44 is extended, the lock link 41 swings around the pin 42 as shown in FIG. The top boom pin 11 is engaged, and the top boom pin 11 is clamped and locked together with the grooves 31a and 31b of the rotary bracket portion 30.

As shown in FIG. 8, FIG. 12, FIG. 16 and FIG. 17, the rotating device 50 attaches one end 51a of the first lever 51 to the pin 33 fixed near the one side on the rear end side of the rotating bracket portion 30. It is rotatably attached. One end 52a of the second lever 52 is rotatably attached to the other end 51b of the first lever 51. A groove 53 that engages with the rotation support pin 12 fixed to the top boom 5 is provided at the other end of the second lever 52.
The first lever 51 and the second lever 52 are connected by a spring 54. The top boom 5 has a groove 53 of the second lever 52.
A retaining plate 5j is fixedly installed so that the pin does not come off from the pin 12 except at a predetermined position during turning. The rotating cylinder 55 connects the pin 34 fixed to the rotating bracket portion 30 and the central portion of the first lever 51. When the rotary cylinder 55 is expanded and contracted, the rotary bracket portion 30 rotates about the top boom pin 11.

FIG. 8 shows the state in which the rotary cylinder 55 is extended and the overhanging rotation is completed, and FIG. 16 shows the rotary cylinder 5
5 is shortened to show the state where the storage rotation is completed. When the supplementary jib is stored, the supplementary jib 6 is made parallel to the boom 5 by the horizontal holding device 20 as shown in FIG. 7. In that case, as shown in FIGS. 14 and 17, the lock link of the first locking device 40 is used. 41 is opened and unlocked, and the rotary bracket portion 3
The 0 grooves 31a and 31b are separated from the top boom pin 11, and the groove 53 of the second lever 52 is also separated from the rotation support pin 12 of the top boom 5 at the same time. At this time, the groove 53 of the second lever 52 contracts in a direction that does not interfere with the retaining plate 5j.

The second locking device 60 is shown in FIG. Figure 1
0 indicates a locked state, and the pin holes 32a and 32b of the rotating bracket portion 30 and the pin hole 13 of the top boom 5 are shown.
It is connected (locked) to a and 13b by connecting pins 61a and 61b. The rotation bracket 30 has a lever 6
2 is rotatably mounted around a center pin 62a, one end 62b of the lever 62 is connected to a connecting pin 61a via a link 63a, and the other end 62c of the lever 62 is connected.
Is connected to the connecting pin 61b via a link 63b. The end portion 62d on the other end side of the lever 62 and the rotating bracket portion 30 are connected by a second lock cylinder 64, and by extending the second lock cylinder 64, as shown in FIG.
As shown in FIG. 18, the lever 62 pivots around the center pin 62a to be in a locked state, and when the lever 62 is shortened, the connecting pins 61a and 61b are connected to the pin holes 13a and 13b of the top boom 5 as shown in FIG. It comes out of and comes to the unlocked state. A lock pin 6 is provided near the other end of the lever 62.
5 is provided, and in the locked state as shown in FIG. 10, the lock pin 65 is inserted to stop the rotation of the lever 62, and the connecting pins 61a and 61b are pulled out from the pin holes 13a and 13b of the top boom 5. Lock it to prevent it. As a result, the supplementary jib 6 is projected and fixed to the tip of the boom 4, and the lifting work is performed safely.

FIG. 19 shows the automatic extension of the auxiliary jib of the present invention.
3 is a hydraulic circuit diagram of the storage device, 70 is a tilt lever provided in the operator's cab 3, 71 is a direction switching valve pilot-operated by the tilt lever 70, 72 is a hydraulic pump, 7
Reference numerals 3 and 74 are reels, and 8 is a tilt cylinder for undulating the auxiliary jib 6. From one direction switching valve 71 to the tilt cylinder 8
A first electromagnetic switching valve 77, a reel 74, a second electromagnetic switching valve 82, and a counter balance valve 86 are sequentially arranged on the tilt operation circuit 75. A reel 73 and a pilot operation check valve 87 are sequentially arranged on the other tilt operation circuit 76.

The first electromagnetic switching valve 77 switches the pressure oil from the hydraulic pump 72 to the tilt operation circuit or to the horizontal embracing operation circuit. In the tilt operating circuit, it goes to the next reel 74, and in the horizontal embracing operation circuit, The horizontal holding cylinder 2 via an electromagnetically operated valve 78 for switching the expansion and contraction of the horizontal holding cylinder.
Go to 5. Further, the electromagnetic operation valve 78 and the other tilt operation circuit 76 are connected by a return circuit 80, and a one-way valve 81 is interposed in the circuit 80. As a result, the oil returned from the horizontal holding cylinder 25 returns to the tank 88 via the return circuit 80 and the other tilt operation circuit 76.

The second electromagnetic switching valve 82 transfers the pressure oil from the hydraulic pump 72 to the tilt operation circuit or the first locking device 4
0, the rotation device 50, or the circuit for the second lock device 60 is switched to, the tilt operation circuit goes to the next counter balance valve 86, and the other circuits sequentially go to the first lock of the first lock device 40. A series circuit goes to the solenoid operated valve 85 for the cylinder 44, the solenoid operated valve 84 for the rotating cylinder 55 of the rotating device 50, or the solenoid operated valve 83 for the second lock cylinder 64 of the second lock device 60.
Further, the electromagnetic operation valve 83 for the second lock cylinder 64 and the other tilt operation circuit 76 are connected by a circuit 89,
A one-way valve 81a is interposed in the circuit 89.

Since the first and second electromagnetic switching valves 77 and 82 are provided on the tilt operating circuit 75, and the one-way valve 81 is provided on the connecting circuit 80 between the tilt operating circuit 76 and the electromagnetic operating valve 78. When the first and second solenoid operated directional control valves are in position a,
By operating the tilt lever 70 and switching the direction switching valve 71, the tilt cylinder 8 is expanded and contracted, and the auxiliary jib 6 is undulated. The first electromagnetic switching valve 77 is switched to the b position, and the directional switching valve 71
Is set to the a position, pressure oil is supplied to the horizontal holding operation circuit, and the electromagnetic holding valve 78 is operated to operate the horizontal holding cylinder 25.
Expands and contracts to extend and store the auxiliary jib 6. Further, at this time, since it does not operate when the direction switching valve 71 is switched to the c position, the tilt lever 70 can be operated in one direction so that the auxiliary jib 6 can be extended and stored.

Similarly, when the second electromagnetic switching valve 82 is switched to the b position and the direction switching valve 71 is set to the a position, the first lock,
By supplying pressure oil to the second lock and rotation operation circuit and operating the electromagnetic operation valves 83, 84, 85, the second lock cylinder 64, the rotation cylinder 55, and the first lock cylinder 44 expand and contract, respectively. At this time, the solenoid operated valve 8
By sequentially operating 3, 84, and 85, the first lock, rotation, and second lock of the auxiliary jib 6 can be sequentially and automatically performed.
Also at this time, similarly, since the operation does not occur when the direction switching valve 71 is switched to the c position, the tilt lever 70 can be operated in one direction to extend and store the auxiliary jib 6.

In the present invention, the second solenoid operated directional control valve 82 and the solenoid operated valves 83, 84 and 8 shown by the chain double-dashed line in FIG.
Since 5 and 5 are attached to the rotating bracket portion 30, the number of reels for the hydraulic hose is only 73 and 74, and the number of pipes in the rotating bracket 30 can be small.

FIG. 20 shows the automatic extension of the auxiliary jib of the present invention.
It is an electrical wiring diagram of a storage device. In FIG. 20, the operator's cab 3 is provided with a changeover switch 90 for switching between overhanging and storing, and the position a is the position during overhanging work, and the position b is the position during storing work. 91a, 91b
Is the top boom 5 against the boom 4 during overhanging work
Is a limit switch for detecting the expansion / contraction position of the top boom 5 for detecting the position of the top boom 5. 91a detects that the top boom 5 shown in FIG.
It is detected that the top boom 5 shown in FIG. Numerals 92a and 92b are limit switches for detecting the expansion / contraction position of the top boom 5 at the time of storage work (the amount of removal of the pins 21, 26 is detected at the position of the top boom 5 with respect to the boom 4). Reference numeral 92a detects that the top boom 5 shown in FIG. 5 has completed extension by a predetermined amount, and 92b detects that the top boom 5 shown in FIG. 6 has completed reduction by a predetermined amount.

Numerals 93a and 93b are limit switches for detecting the starting position of the auxiliary jib 6 by the horizontal holding device 20, and 93a is the ending position shown in FIG.
The top boom pin 11 and the grooves 31a and 31b shown in FIG.
Detecting that the engagement with and has been released, 93b detects the completion state of storage shown in FIG. 6, that is, the engagement between the top boom pin 11 and the grooves 31a and 31b shown in FIG. 94a and 94b are locks of the second lock device 60,
And a limit switch for detecting an unlock position, 94a detects completion of locking shown in FIG. 10, and 94b detects completion of unlocking shown in FIG.

Numerals 95a and 95b are limit switches for overhanging rotation of the rotating device 50 and detection of the retracted rotation position. 95a detects that the overhanging rotation shown in FIG. 8 is completed, and 95b indicates the retracting rotation shown in FIG. Detects completion. 96a and 96b are limit switches for locking and unlocking the first locking device 40, and 96a detects that the lock is completed as shown in FIG. 15, and 96b shows that the lock is released as shown in FIG. To detect.

Reference numerals 97a, 97b, 97c and 97d denote pilot lamps provided in the cab 3 as detection result display means. The pilot lamp 97a is configured such that the top boom 5 has been shortened when the auxiliary jib is extended and
Lights up when the first lock device 40 is completely locked and the first lock device 40 is locked. The pilot lamp 97b is turned on when the top boom 5 is completely extended, the rotary bracket 30 is completely extended and rotated, and the second lock device 60 is completely locked when the auxiliary jib is extended. The pilot lamp 97c is
When the supplemental jib is stored, the top boom 5 is completely extended, the second lock device 60 is completely unlocked, and the rotation bracket is lit when the storage rotation is completed. Pilot lamp 97d
When the auxiliary jib is stored, the top boom 5 has been shortened, the first lock device 40 has been unlocked, and the horizontal holding device 20
Lights up when is stored. Reference numeral 98 is a diode.

21 and 22 are views showing an example of automatic extension of the auxiliary jib of the present invention and attachment of a limit switch of the storage device. 21 and 22, the position of the top boom 5 with respect to the boom is shown, and further, FIG. 22 shows the attachment of a limit switch for detecting the extension and storage of the auxiliary jib 6. The other limit switches are likewise arranged in the vicinity of the relevant control member.

In FIG. 21, there are limit switches 91a and 92a for detecting the extended position of the top boom 5, the limit switches 91a and 92a being mounted on the boom 4.
The position of the bracket 5m of the top boom 5 is detected to detect that the top boom 5 has extended to a predetermined position.
At this time, the limit switches 91a and 92a may be installed on the top boom 5 and the bracket 5m may be installed on the boom 4 in reverse. 22, the limit switches 91b and 92b for detecting the contracted position of the top boom 5 are attached to the bracket 16 (shown in FIG. 5) fixed to the boom 4 and the locking pins 2 are attached.
Position 6 is detected. Further, a limit switch 93 for detecting a starting position for detecting the end of storage of the auxiliary jib 6
b and a limit switch 93a for detecting a swinging position that detects the end of the movement of the auxiliary jib 6 from the horizontal holding to the overhang are mounted on the bracket 14 fixed to the boom 4.
The moving position of the rod 28 is detected. In this case, the moving position of the horizontal holding cylinder 25 may be detected. In addition,
Although the limit switch is used for position detection in the above, a cylinder with position detection for detecting the position may be used for the rod of the cylinder.

Next, the method of projecting the auxiliary jib will be described with reference to FIGS.
This will be described with reference to FIG. (1) In step 101, the operator removes the storage pin 7 (shown in FIG. 4). (2) In step 102, the operator selects the changeover switch 9
0 (shown in FIG. 20) is switched to the overhang position. (3) In step 103, the operator operates the tilt lever 7
0 (shown in FIG. 19) is operated to switch the direction switching valve 71 to the a position. (4) In step 104, the limit switch 91b detects that the top boom 5 is in the shortened position, switches the first electromagnetic switching valve 77 to the b position, and switches the electromagnetic operation valve 78 to the a position to shift the side holding device 20. The horizontal holding cylinder 25 is actuated to swing out the auxiliary jib 6 (W direction in FIG. 4). As a result, the top boom pin 11 engages with the grooves 31a and 31b of the rotating bracket portion 30, and the rotation support pin 12 of the top boom 5 engages with the groove 53 of the second lever 52 of the rotating device 50. (5) In step 105, the limit switch 93a detects that the supplementary jib 6 has been swung out, and returns the first electromagnetic switching valve 77 to the a position and the electromagnetic switching valve 78 to the b position to move the horizontal holding cylinder 25. Stop. In addition, the second electromagnetic switching valve 82 is switched to the b position and the electromagnetic operation valve 85 is switched to the a position to switch the first lock cylinder 4 of the first locking device 40.
4 to lock the top boom pin 11. (6) In step 106, the limit switch 96a detects that the first lock device 40 is completely locked, returns the electromagnetically operated valve 85 to the position b, and lights the pilot lamp 97a.

(7) In step 107, the operator confirms the lighting of the pilot lamp 97a, switches the boom valve (not shown), and extends the top boom 5 by a predetermined amount to the position where the locking pin 21 comes out of the groove 23 of the lever 22. Let At this time, the pilot lamp 97a is turned off once,
When it reaches a predetermined position, it lights up again. (8) In step 108, the limit switch 91a detects that the top boom 5 is completely extended, switches the electromagnetic operation valve 84 to the a position, operates the rotary cylinder 55 of the rotary device 50, and extends the rotary bracket 30 to rotate it. Let (9) In step 109, the limit switch 95a detects that the rotating bracket portion 30 has overhanged and completed rotation, switches the electromagnetically operated valve 83 to operate the second lock cylinder 64 of the second lock device 60, and the top boom 5 Connect the connecting pin 61a to the rotary bracket 30 and the pin hole 1
3a, the connecting pin 61b is inserted into the pin hole 13b and locked. (10) In step 110, the limit switch 94a detects that the second lock device 60 is locked, and turns on the pilot lamp 97b. (11) In step 111, the operator confirms that the pilot lamp 97b is turned on and returns the tilt lever 70,
Lock pin 65 of the second lock device 60 (shown in FIG. 10)
Put on. The doubly enclosed part in the flow chart is the part that operates automatically. It should be noted that the tilt lever 70 controls the speed of movement of each cylinder, and the operation and stop thereof.

In the above embodiment, the limit switch 91b detects that the top boom 5 is in the shortened position, and the lateral holding cylinder 25 overhangs to extend the auxiliary jib 6.
The top boom pin 11 and the grooves 31a and 31b of the rotary bracket portion 30 were engaged with each other.
0 is extended by a predetermined amount to the position where the grooves 31a and 31b of 0 are engaged, and then the auxiliary holding jib 6 is swung to engage the auxiliary jib 6 by the overhanging cylinder 25. The top boom 5 may be extended by a predetermined amount to a position where 21 is removed. As a result, the engagement position becomes accurate and the engagement is ensured.

Further, in the above-described embodiment, the top boom 5 is extended by a predetermined amount to the position where the locking pin 21 comes out from the groove 23 of the lever 22, but the top boom 5 is stopped at that position and the lever 22 is stopped. The side may be slid or swung to release the lock.

To summarize the above description, the lateral holding cylinder 2 between the boom 4 and the auxiliary jib 6 when the auxiliary jib is extended.
The auxiliary jib 6 is laterally oscillated to a predetermined position by the force of 5 and overhangs, and after this overhang, the side surface near the tip of the boom 4 and the auxiliary jib 6 when the auxiliary jib 6 and the boom 4 are juxtaposed with each other. 1
The locking device 40 is engaged, and then the rotating bracket portion 30 is extended toward the front of the boom 4 by the turning force of the rotating cylinder 55 of the rotating device 50 with respect to the boom 4, and the boom when the auxiliary jib 6 and the boom 4 are juxtaposed. A second locking device 60 engages the distal end side surface of 4 and the auxiliary jib 6.

Next, the method of storing the supplementary jib will be described with reference to the flowchart of FIG. (1) In step 201, the operator removes the lock pin 65 of the second lock device 60. (2) In step 202, the operator selects the changeover switch 9
0 (shown in FIG. 20) is switched to the storage position b. (3) In step 203, the operator operates the tilt lever 7
0 (shown in FIG. 19) is operated in the same direction as the overhang to switch the direction switching valve 71 to the a position. (4) In step 204, the limit switch 92a confirms that the top boom 5 is in the extended position, switches the second electromagnetic switching valve 82 to the b position, and the electromagnetic operation valve 83 to the c position to shift the second position. The second lock cylinder 64 of the lock device 60 is contracted, and the connecting pins 61a and 61b of the top boom 5 and the rotary bracket 30 are connected to the pin holes 13a.
Remove from 13b and unlock. (5) In step 205, the limit switch 92b detects that the second lock device 60 has been completely released, switches the electromagnetically operated valve 84 to the position c, and causes the rotary cylinder 55 of the rotary device 50 to contract, thereby rotating the rotary bracket. The part 30 is stored and rotated.

(6) In step 206, the limit switch 95b detects that the storage rotation is completed, and turns on the pilot lamp 97c. (7) In step 207, the operator confirms that the pilot lamp 97c is turned on, and switches the boom switching valve (not shown) to shorten the top boom 5 by a predetermined amount. At this time, the pilot lamp 97c is turned off once,
When it reaches a predetermined position, it lights up again. (8) In step 208, the limit switch 92b detects that the top boom 5 has been shortened, switches the electromagnetically operated valve 85 to the c position, and causes the first lock cylinder 44 of the first lock device 40 to contract, thereby reducing the top position. Boom pin 1
Unlock 1 (9) In step 209, the limit switch 96b detects that the first lock release is completed, and the first electromagnetic switching valve 7
7 is switched to the b position and the electromagnetic operation valve 78 is switched to the c position to extend the lateral holding cylinder 25 of the lateral holding device 20 to store the auxiliary jib 6. (10) In step 210, the limit switch 93b detects that the auxiliary jib 6 is completely stored, and turns on the pilot lamp 97d. (11) In step 211, the operator confirms that the pilot lamp 97d is turned on, and the tilt lever 70
Back, and attach the storage pin 7 (shown in FIG. 4).

To summarize the above description, when the auxiliary jib is retracted, the second locking device 60 between the auxiliary jib 6 and the distal side surface of the boom 4 when the boom 4 and the auxiliary jib 6 are juxtaposed is disengaged,
Next, the rotary bracket portion 30 projecting in front of the boom 4 is attached to the rotary cylinder 5 of the rotary device 50 with respect to the boom 4.
When the auxiliary jib 6 and the boom 4 are juxtaposed, the first locking device 40 between the side surface near the tip end of the boom 4 and the auxiliary jib 6 is disengaged. After detachment, the auxiliary jib 6 is laterally swung by the force of the horizontal holding cylinder 25 between the boom 4 and the auxiliary jib 6 and stored in a predetermined position.

In the above embodiment, the turning radius of the supplementary jib 6 can be sufficiently obtained on a flat ground, but the supplementary jib 6 can be placed at a narrow place.
When performing the overhanging or storing operation of the rotating bracket portion 30, the boom 4 may be erected and the rotating bracket portion 30 may be rotated while the auxiliary jib 6 is tilted, as shown in FIG. In that case, the standing angle α of the boom 4 is 24 ° to 26 °.
Then, if the tilt cylinder 8 is made the shortest in that state,
The complementary jib 6 is tilted in the arrow direction from the position indicated by the chain double-dashed line and moved to the position indicated by the solid line. At this time, the center of gravity G of the auxiliary jib 6
Is almost on a perpendicular line Y-Y passing through the center position C of the top boom pin 11 which is the rotation axis of the rotation bracket 30.
Therefore, when rotating the rotating bracket 30,
It requires less rotation torque.

In the above description, as an example of the extension of the supplementary jib 6 in a narrow space, after raising the boom 4 by a predetermined amount, the auxiliary jib 6 is preset by the force of the horizontal holding cylinder 25 between the boom 4 and the supplemental jib 6. When the auxiliary jib and the boom are juxtaposed, the side surface near the tip of the boom 4 and the auxiliary jib 6 are engaged by the first locking device 40, and then the auxiliary jib 6 is moved to the position. When the tilt cylinder 8 is tilted downward by contraction, and further, the rotating bracket portion 30 is projected to the front of the boom 4 by the turning force of the rotating cylinder 55 of the rotating device 50 with respect to the boom 4, and the boom 4 and the auxiliary jib 6 are installed side by side. The second locking device 60 engages the distal side surface side of the boom 4 with the auxiliary jib 6.

As an example of the storing operation, after the boom 4 is erected by a predetermined amount, the auxiliary jib 6 is tilted downward by reducing the tilt cylinder 8, and then the boom 4 and the auxiliary jib 6 are moved.
The second locking device 60 between the distal side surface of the boom 4 and the auxiliary jib 6 when being installed side by side is disengaged, and after the disengagement, the rotating bracket portion 30 projecting forward of the boom 4 is attached to the rotating device 50 for the boom 4. When the tilt cylinder 8 is rotated by the turning force of the rotary cylinder 55 to a predetermined position, the tilt cylinder 8 is extended to return the auxiliary jib 6 to the parallel position with the boom 4, and when the auxiliary jib 6 and the boom 4 are arranged side by side. The first locking device 40 between the side surface near the tip of the boom 4 and the auxiliary jib 6 is disengaged, and after the disengagement, the force of the lateral holding cylinder 25 between the boom 4 and the auxiliary jib 6 swings the auxiliary jib 6 laterally. And store it in a predetermined position.

[0062]

As described in detail above, the present invention has the following effects. (1) The present invention relates to a vehicle-mounted crane having a complementary jib at the tip of a boom that expands and contracts in multiple stages, and a horizontal hugging device for extending and retracting the auxiliary jib and storing the auxiliary jib.
A rotating bracket that connects the top boom and auxiliary jib,
A first locking device that locks a top boom pin that connects the rotating bracket rotating device, one side of the top boom, and one side of the rotating bracket, and connects the other side of the top boom and the other side of the rotating bracket. And a second locking device. In addition, a hydraulic device equipped with a hydraulic cylinder that operates each device, and a solenoid valve that controls each hydraulic cylinder, and a limit switch that detects the operating position of each device and operates each solenoid valve of the hydraulic device. And an electric device having. Then, a display device for displaying the detection result of the operating position is provided in the operator's cab, and the overhanging or storing operation is sequentially performed while confirming the completion of the operation of the previous process. Therefore, while the operator is checking the display device in the operator's cab when projecting or retracting the supplementary jib,
The changeover switch operation, the boom operation, and the tilt lever operation are performed automatically, and the number of preparation steps is small, and in a short time, there is little fatigue, and there is little risk of interference of each part due to erroneous operation.

(2) Since a switching valve for overhanging and storing circuit is provided on the tilt operating hydraulic circuit, and a one-way valve is provided between the operating valve for the horizontal holding cylinder and the directional switching valve for tilting, The tilt lever can be extended and stored, and only when the tilt lever is operated in one direction, the extension and storage operations are performed, which is safe for operation. (3) Since the rotating device and the solenoid valves of the first and second locking devices are mounted on the rotating bracket, the number of reels of the hydraulic hose is only two, and the hydraulic pipe in the rotating bracket can be reduced. (4) When the boom is erected at a predetermined angle and the auxiliary jib is tilted, the rotational torque of the rotating bracket is small because the center of gravity of the auxiliary jib is almost on the perpendicular line passing through the center of the rotating shaft of the rotating bracket. I'm sorry.

[Brief description of drawings]

FIG. 1 is a side view of a traveling posture of a vehicle-mounted crane.

FIG. 2 is a plan view of a traveling posture of a vehicle-mounted crane.

FIG. 3 is a side view showing a work posture of a vehicle-mounted crane.

FIG. 4 is a plan view of a crane vehicle equipped with the auxiliary jib overhanging and storing device of the present invention.

FIG. 5 is a plan view showing a disengaged state between the auxiliary jib and the horizontal holding device of the horizontal holding device of the present invention.

FIG. 6 is a plan view showing the horizontal holding device of the present invention in a state where the supplementary jib is extended.

FIG. 7 is a plan view showing a state in which a supplementary jib is stored in the horizontal holding device of the present invention.

FIG. 8 is a plan view showing a state in which the auxiliary jib overhanging rotation of the rotating device of the present invention is completed.

FIG. 9 is a side view showing a locked state of the first locking device of the present invention.

FIG. 10 is a side view showing a locked state of the second locking device of the present invention.

FIG. 11 is a perspective view showing a configuration of a rotation bracket of the present invention.

FIG. 12 is a perspective view showing a configuration of a rotating device of the present invention.

FIG. 13 is a perspective view showing a configuration of a first locking device of the present invention.

FIG. 14 is a plan view showing the unlocked state of the first locking device of the present invention.

FIG. 15 is a plan view showing a locked state of the first locking device of the present invention.

FIG. 16 is a plan view showing a state in which the rotating device according to the present invention is completely stored and rotated.

FIG. 17 is a plan view showing a state in which the rotating device of the present invention has been stored in the auxiliary jib.

FIG. 18 is a side view showing the unlocked state of the second locking device of the present invention.

FIG. 19 is a hydraulic circuit diagram of the auxiliary jib overhanging and storing device of the present invention.

FIG. 20 is an electrical system diagram of the auxiliary jib overhanging and storing device of the present invention.

FIG. 21 is a diagram showing an example of mounting the limit switch of the present invention.

FIG. 22 is a view showing an example of another place where the limit switch of the present invention is mounted.

FIG. 23 is a flow chart of a method for projecting a complementary jib according to the present invention.

FIG. 24 is a flowchart of a method for storing a complementary jib according to the present invention.

FIG. 25 is an explanatory view of a case where the boom is erected and the auxiliary jib is tilted during the rotating bracket rotating work of the auxiliary jib overhanging and storing device of the present invention.

[Explanation of symbols]

5 top boom, 6 auxiliary jib, 7 storage pin, 8 tilt cylinder, 11 top boom pin, 12 rotation support pin, 20 horizontal holding device,
22, 62 lever, 25 horizontal holding cylinder, 2
7 hooks, 28 rods, 30 rotation bracket parts, 40 first lock device, 41 lock link, 44 first lock cylinder, 50 rotation device, 51 first lever, 52 second lever,
55 rotating cylinder, 60 second locking device,
61a, 61b Connection pin, 63a, 63b Link, 64 Second lock cylinder, 70 Tilt lever, 71 Direction switching valve, 77 First solenoid switching valve,
78, 83, 84, 85 solenoid operated valve, 81 one-way valve, 82 second solenoid selector valve, 90 selector switch,
91-96 limit switch, 97 pilot lamp,

Claims (20)

[Claims] 1. A rotary bracket part which is mounted on a vehicle so as to be capable of undulating, and which is attached to and detached from the boom at the tip of a boom that expands and contracts in multiple stages, and an undulating complementary jib is provided on the rotary bracket part.
By rotating the rotating bracket part with respect to the boom, the auxiliary jib for a crane is provided with a supplementary jib overhanging and retracting device that projects forward in front of the boom during work and is stored side by side on the side face of the boom during storage. When the auxiliary jib is extended, the force of the boom and the auxiliary jib causes the auxiliary jib to swing laterally to the specified position and to extend, and after the extension, the side surface near the tip of the boom when juxtaposed. And a supplementary jib, and then, the rotating bracket portion is projected to the front of the boom by the turning force with respect to the boom, and the side face farthest from the tip of the boom and the supplementary jib are engaged with each other during parallel installation. Automatic extension of supplementary jib for
Storage method. 2. A rotating bracket part which is mounted on a vehicle so as to be capable of being raised and lowered and which is capable of expanding and contracting in multiple stages.
By rotating the rotating bracket part with respect to the boom, the auxiliary jib for a crane is provided with a supplementary jib overhanging and retracting device that projects forward in front of the boom during work and is stored side by side on the side face of the boom during storage. When the auxiliary jib is retracted, when the auxiliary jib is retracted, the side surface on the far side of the boom tip is removed from the auxiliary jib, and then the rotating bracket that extends in front of the boom is rotated by the pivoting force against the boom. Then, after rotating to the predetermined position, the side surface near the boom tip and the auxiliary jib when separated side by side are separated from each other, and after separation, the force between the boom and the auxiliary jib causes the auxiliary jib to swing laterally to the specified position. A method of automatically projecting and storing a supplementary jib for a crane, which is characterized in that 3. A rotating bracket part which is mounted on a vehicle so as to be capable of undulating, and which is attached to and detached from the boom at the tip of a boom which expands and contracts in multiple stages, and an undulating auxiliary jib is provided on the rotating bracket part.
By rotating the rotating bracket part with respect to the boom, the auxiliary jib for a crane is provided with a supplementary jib overhanging and retracting device that projects forward in front of the boom during work and is stored side by side on the side face of the boom during storage. When the auxiliary jib is extended, the boom is erected by a predetermined amount and then the force between the boom and the auxiliary jib causes the auxiliary jib to swing laterally to a predetermined position. Engage the side surface near the boom tip with the auxiliary jib, then tilt the auxiliary jib downward, and further project the rotating bracket part to the front of the boom by the turning force on the boom. And a supplementary jib are engaged with each other. 4. A rotary bracket part which is mounted on a vehicle so as to be capable of undulating, and which is attached to and detached from the boom at the tip of a boom that expands and contracts in multiple stages, and an undulating complementary jib is provided on the rotary bracket part.
By rotating the rotating bracket part with respect to the boom, the auxiliary jib for a crane is provided with a supplementary jib overhanging and retracting device that projects forward in front of the boom during work and is stored side by side on the side face of the boom during storage. When the auxiliary jib is stored, the auxiliary jib is tilted downward after standing up the boom by a predetermined amount when the auxiliary jib is retracted, and then the side of the boom tip far side when side-by-side and the auxiliary jib are separated, and after the separation. The rotating bracket that extends in front of the boom is rotated by the pivoting force with respect to the boom, and after rotating to the specified position, the auxiliary jib is returned to the parallel position with the boom. An automatic extension of a supplementary jib for a crane, characterized in that the auxiliary jib is separated from the jib, and after the separation, the auxiliary jib is laterally swung by the force between the boom and the auxiliary jib and stored in a predetermined position. Storage method. 5. A rotating bracket part which is mounted on a vehicle so as to be capable of undulating, and which is attached to and detached from the boom at a tip end of a boom which expands and contracts in multiple stages, and an undulating complementary jib is provided on the rotating bracket part.
By rotating the rotating bracket part with respect to the boom, the auxiliary jib for a crane is provided with a supplementary jib overhanging and retracting device that projects forward in front of the boom during work and is stored side by side on the side face of the boom during storage. In the overhanging and storing method of the auxiliary jib, (1) after the detection means detects that the top boom is at a predetermined shortened position, the auxiliary jib is oscillated laterally, and the base end of the auxiliary jib is moved. A groove provided on one side in the left-right direction of the rear end of the rotary bracket attached to the section, and the engagement work of the top boom pin fixed to one side in the left-right direction of the tip of the top boom is started, (2) After the detection means detects that the groove of the rotary bracket and the top boom pin are engaged, the rotary bracket and the top boom pin are locked, and (3)
The top boom is extended after the detection means detects that the locking of the first lock device is completed, and (4) the rotation bracket is extended after the detection means detects that the top boom has extended to a predetermined length. (5) After the detection means detects that the rotating bracket has rotated to a predetermined position, the other side of the top end of the top boom and the other side of the rear end of the rotating bracket are pinned. A method for automatically overhanging and storing a supplementary jib for a crane, characterized in that it has respective steps of locking by means of 6. A rotating bracket part which is mounted on a vehicle so as to be movable up and down and expands and contracts in multiple stages.
By rotating the rotating bracket part with respect to the boom, the auxiliary jib for a crane is provided with a supplementary jib overhanging and retracting device that projects forward in front of the boom during work and is stored side by side on the side face of the boom during storage. In the overhanging and retracting method of (1), when the auxiliary jib is retracted, (1) after the detection means detects that the top boom has reached a predetermined length, the other side of the top boom tip in the left-right direction and the rotating bracket. After unlocking the second locking device that locks the other end of the rear end with the other side in the left-right direction with a pin, and (2) the detection means detects that the unlocking of the second locking device has been completed, the rotation bracket is removed. After storing, (3) the detection means detects that the rotation bracket has rotated to a predetermined position, the top boom is shortened, and (4) the top boom is predetermined. After the detection means detects that the top boom has been shortened to the retracted position, the top boom pin fixed to one side in the left and right direction of the tip of the top boom is engaged with the groove in the one side in the left and right direction at the rear end of the rotating bracket. 1st to let and lock
After unlocking the lock device, and (5) after detecting that the unlocking of the first lock device is completed,
A method for automatically projecting and storing a supplementary jib for a crane, which comprises steps for starting storage of the supplementary jib. 7. A rotating bracket part which is mounted on a vehicle so as to be capable of undulating, and which is attached to and detached from the boom at a tip end of a boom which expands and contracts in multiple stages, and an undulating complementary jib is provided on the rotating bracket part.
By rotating the rotating bracket part with respect to the boom, the auxiliary jib for a crane is provided with a supplementary jib overhanging and retracting device that projects forward in front of the boom during work and is stored side by side on the side face of the boom during storage. In the overhanging device, a horizontal holding device that swings the auxiliary jib laterally, a rotating bracket portion that separates or connects the auxiliary jib and the top boom, a first locking device that locks the top boom and the rotating bracket portion, and a first locking device. 2 A locking device and a rotating device for rotating the rotating bracket part with respect to the boom, which automatically extends the auxiliary jib for a crane,
Storage device. 8. A groove provided on one side of the rotating bracket portion in the left-right direction and a first locking device and a second locking device for locking the top boom and the rotating bracket portion, and one side of the top boom in the left-right direction. A first locking device that locks by engaging a top boom pin that is fixed to the second locking device, and a second locking device that locks the other side of the rotating bracket part in the left-right direction and the other side of the top boom in the left-right direction by a pin. An automatic extension of the auxiliary jib for a crane according to claim 7,
Storage device. 9. A lateral holding device has a groove that engages with a pin fixed to one position of the auxiliary jib, and connects the link swingably attached to one position of the boom and the boom to the link. A horizontal holding cylinder, a bracket that has a groove that engages with a pin that is fixed to another position of the auxiliary jib, and that is fixed to another position of the boom, and a hook that is swingably attached to the bracket and that engages with the pin. The automatic projecting and retracting device for the auxiliary jib for a crane according to claim 7, further comprising: a rod connecting the link and the hook. 10. The rotating bracket portion is provided with a groove on one of the left and right sides of the base end thereof that engages with a top boom pin that is vertically fixed to one of the left and right sides of the tip end of the top boom. On the other side of the left and right of, there is a pin hole that connects with the other side of the left and right of the tip of the top boom by a connecting pin in the vertical direction,
8. An automatic projecting jib for a crane according to claim 7, wherein the tip has a pin hole for undulatingly mounting the auxiliary jib, and the upper part has a pin for mounting a rotary cylinder for rotating the rotary bracket part with respect to the boom. Storage device. 11. A first locking device is swingably mounted on a rotating bracket part and holds a top boom pin together with a groove of the rotating bracket part, and a locking link mounted on the rotating bracket part to operate the locking link. The automatic projecting and retracting device for the auxiliary jib for a crane according to claim 7 or 8, further comprising a first lock cylinder. 12. A rotating device, wherein a first lever having one end rotatably attached to a pin fixed to an upper surface of a rear end portion of a rotating bracket portion and one end rotatably attached to the other end of the first lever. The crane according to claim 7, further comprising: a second lever attached to the other end, the second lever having a groove for engaging a rotation support pin fixed to the top boom, and a rotation cylinder connecting the first lever and the rotation bracket. Automatic extension and storage device for supplementary jib. 13. The second locking device comprises: two upper and lower connecting pins for connecting the top boom and the rotating bracket portion; a lever having a central portion swingably attached to the rotating bracket; and a lever and the rotating bracket portion. 9. The auxiliary jib automatic overhanging and storing device for a crane according to claim 7 or 8, further comprising a second lock cylinder for connecting the lever and two links for connecting both ends of the lever and the connecting pin. 14. A detecting means for detecting the positions of the boom and the top boom, a detecting means for detecting the position of a lateral holding device for horizontally swinging the auxiliary jib, and a connecting or disconnecting the auxiliary jib and the top boom. A detecting means for detecting detachment or connection of the rotating bracket portion; a detecting means for detecting locking and unlocking of the first locking device and the second locking device for locking and unlocking the top boom and the rotating bracket portion; The automatic projecting and retracting device for a crane auxiliary jib according to claim 7, further comprising: a rotational position detecting means for detecting a rotational position of a rotating device that rotates the rotating bracket portion. 15. A device for automatically projecting and storing a supplementary jib for a crane, comprising display means for displaying a detection result of the detection means in a driver's cab according to claim 14. 16. When the boom is erected at a predetermined angle, the auxiliary jib is tilted to a predetermined position, and the rotating bracket is rotated, the center of gravity of the auxiliary jib is almost the same as that of the rotating shaft of the rotating bracket. 8. A perpendicular line passing through the center.
Automatic extension and storage device for the auxiliary jib for the described crane. 17. A rotating bracket part which is mounted on a vehicle so as to be capable of being raised and lowered, and which is attached to and detached from the boom at a tip of a boom which expands and contracts in multiple stages, and an undulating complementary jib is provided on the rotating bracket part. The auxiliary jib overhanging device, which overhangs in front of the boom during work and is stored side by side on the side face of the boom during storage, is provided in the projecting device of the auxiliary jib for a crane equipped with a retracting device. A tilt lever for performing an up / down operation of a jib, a direction switching valve operated by the tilt lever, a tilt operation circuit, and a lateral holding operation circuit
Electromagnetic switching valve, electromagnetic holding valve for horizontal holding cylinder, tilt operating circuit, second lock valve for switching between first lock, second lock, and rotation operating circuit, and first lock cylinder solenoid operating valve And a second lock cylinder electromagnetically operated valve and a rotary cylinder electromagnetically operated valve. 18. A direction switching valve operated by a tilt lever and a solenoid valve for a horizontal holding cylinder, and a direction switching valve operated by a tilt lever, and a solenoid for a second lock cylinder. The automatic jib automatic extension and storage device for a crane according to claim 17, wherein a one-way valve is provided in one of the circuits connecting to the operation valve. 19. A solenoid valve for a first lock cylinder,
The auxiliary jib automatic extension and storage device for a crane according to claim 17, wherein the rotary cylinder electromagnetic operation valve, the second lock cylinder electromagnetic operation valve, and the second electromagnetic switching valve are mounted on a rotary bracket. . 20. A solenoid valve for a first lock cylinder,
20. The automatic auxiliary jib extension and storage device for a crane according to claim 17 or 19, wherein the electromagnetic operation valve for the rotary cylinder, the electromagnetic operation valve for the second lock cylinder, and the second electromagnetic switching valve are connected by a series circuit.