JP2674975B2 - Crane device with work platform for high places - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane device with an aerial work platform suitable for aerial work such as construction of high-rise buildings.

[0002]

2. Description of the Related Art When working at a high place such as construction of a high-rise building, a work platform that has been loaded onto a truck and transported to a work site is lifted by a crane and connected to a boom tip of a crane of another crane vehicle, The crane operator is operated to extend the crane to a predetermined height, and the operator who is on the work platform operates the work platform so that the posture of the work platform is maintained in a substantially horizontal state to perform work at high altitudes. It was In addition, as a high-place work method for constructing a building at a high place by using equipment preloaded on the work floor from above the work floor provided at the upper end of the extended crane of the crane vehicle, Japanese Patent Publication No. 6-54059. The technique disclosed in the publication is known.

That is, the technique disclosed in Japanese Patent Publication No. 6-54059 discloses that a work container for forming the work floor is installed on a pedestal installed in a transportation vehicle and a material container provided on the work container is installed. With the equipment already loaded in the loading part, transport it to the work site, and at the work site, insert the connecting arm connected to the tip of the crane to the lower side of the work container through the gap of the gantry, then connect the arm. The top of the work container to the bottom side of the work container, then extend the crane upwards while maintaining the work container in a horizontal position, and use the equipment in the equipment loading section on the work container to construct a building at a high location. It is a work method for working in high places. According to this aerial work method, the work time at the work site can be improved, and the noise at the work site can be effectively prevented.

[0004]

However, in the conventional crane vehicle with a work platform (work container) for high-altitude work as described above, the work platform (work container) can be operated by the operation of a worker who has boarded the work platform. (Container) is maintained in a substantially horizontal position, or work platform (work container)
Although it is possible to rotate, there has never been a device having an automatic control function of maintaining the balance of the posture of the work platform (work container) according to the elevating motion of the crane. In addition, there has not been a device having a remote control function for changing the posture of a work platform (work container) and turning motion.

Therefore, an object of the present invention is to enable automatic control for maintaining the balance of the posture of an aerial work platform connected to the boom tip of the crane, so that the posture of the aerial work platform associated with the elevating motion of the crane can be controlled. An object of the present invention is to provide a crane device with a work platform for high places, which can easily and surely maintain the equilibrium of the above and enhance the safety. Further, the present invention provides
In a crane device with an aerial work platform that has an automatic control function for maintaining the posture balance of such aerial work platform, it is possible to change the posture of the aerial work platform and to remotely control the turning motion. . The present invention further provides a crane device with an aerial work platform, which is provided with an automatic control function for maintaining the posture balance of the aerial work platform as described above and a remote control function for the posture change and the turning motion. It also aims to further enhance the sex.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 is to provide a handrail and a handrail around the work platform where the boom tip of the crane is attached to an aerial work platform, for example, a striped steel plate. An aerial work platform with an opening and closing port provided at one location is connected and equipped, and a balancing device such as a hydraulic jack that allows adjustment and operation of the aerial work platform in a substantially horizontal position and the aerial work platform are swung. A swinging device such as an electric motor that can be operated, and the work platform for high places driven by the balancing device.
Balance controller for automatic adjustment of almost horizontal posture
And contact detection to detect contact from above and around.
In a crane with an aerial work platform equipped with an out frame,
The posture of the aerial work platform and the limit state of turning and the contact
By detecting the contact state of the touch detection frame,
Notification device for notifying the contact detection state and issuing a warning, for example
For example, it features an alarm buzzer and an alarm light .

As described above, the aerial work platform connected to the boom tip of the crane can be swung, the balancing device can be adjusted to a substantially horizontal posture, and the driving can be performed in a substantially horizontal posture. Since it is a crane device with an aerial work platform equipped with an automatic balance control device that performs automatic adjustment operation, it is of course possible to maintain the posture of the aerial work platform in a substantially horizontal state, or rotate the aerial work platform. In particular, the automatic balancing control device can appropriately drive the balancing device according to the elevating motion of the crane to automatically adjust the work platform for high places to a substantially horizontal posture. That is, it is possible to easily and reliably maintain the equilibrium of the posture of the work platform for high places due to the ups and downs of the crane, so that the safety can be improved.

[0008]

[0009]

Further, in the invention according to claim 1, a contact detection frame for detecting a contact from above and around the aerial work platform, for example, a contact detection installed from a handrail through a contact detection switch. It is characterized by a frame material made of rods.

As described above, since the crane device with an aerial work platform is provided with a contact detection frame on the aerial work platform, contact with a building is detected by the contact detection frame, and further danger of the aerial work platform is detected. It is possible to stop such movement. Further, due to the presence of the contact detection frame, it is possible to protect the worker who gets on the work platform at a high place from above and around. Therefore, the safety can be further enhanced.

[0012] Then, an invention according to claim 1, the detection of the contact state of the posture and the turning limit state and the contact detection frame of the aerial platform, a warning to notify the limit state and the contact detection state Is provided with an alarm device, for example, an alarm buzzer and an alarm light.

As described above, the crane device with an aerial work platform is equipped with the alarm device for warning the posture and the limit state of the aerial work platform and the contact detection state of the contact detection frame.
The alarm device notifies the workers who have boarded the aerial work platform and the crane body operator that the posture and turning of the aerial work platform are in the limit state and the contact detection frame is in the contact detection state. Be given a warning. Further, at the same time as the notification operation by the notification device, it is possible to stop further movement of the work platform for high places.

Further, the invention according to claim 2 is based on claim 1.
In the crane device with an aerial work platform described, a load limit value detecting means for detecting an allowable limit value of a load on the aerial work platform, for example, a load cell and the balancing device (electric jack) by a load on the aerial work platform. Etc.) is provided with an eccentric load limit value detecting means for detecting an allowable limit value of the eccentric load, for example, a limit switch, and the load limit value detection means (load cell etc.) detects the load limit value and the eccentricity. In response to the detection of the eccentric load limit value by the load limit value detection means (limit switch, etc.), the alarm device (alarm buzzer, alarm light, etc.) notifies, and the operation of the crane and the balance device (electric Emergency stop means for forcibly stopping the operations of the jack etc.) and the turning device (electric motor etc.),
It features a configuration with an emergency stop button.

[0015] Thus, in addition to the notification apparatus according to claim 1, the load limit value detecting means aerial work platform, and the eccentric load limit value detecting means of the balancing device, very crane with equalizer and turning device Since it is a crane device with an aerial work platform equipped with a stopping means, the fact that the aerial work platform is in the load limit state and the equilibrium device is in the eccentric load limit state means that the workers and cranes who have boarded the aerial work platform A warning is given to the operator of the main body by a notification device. In addition, it is possible to stop the movement of the work platform at a high place at the same time as the notification operation by the notification device. And
In order to avoid danger, the crane operation, balancing device, and swing device operations are forcibly stopped by operating the emergency stop means by a worker who has boarded an aerial work platform or an operator of the crane body. To be

[0016]

[0017]

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the crane device with a work platform for high places according to the present invention will be described below with reference to FIGS.
It will be described based on.

<First Embodiment> First, FIG. 1 shows a first embodiment of a crane apparatus with an aerial work platform as an example to which the present invention is applied. The aerial work platform is shown in FIG. FIG. 3 is a schematic side view showing an example of work at a high place by a crane device with a built-in crane, and FIG. 2 is an enlarged side view of the crane device with a work platform for a high place. In these FIG. 1 and FIG.
1 is a dome roof steel frame, 2, 3 and 4 are work scaffold towers, 5 is a platform for getting on and off, and 6 is a crane device with a work platform for high places, 7
Is a crane vehicle, 8 is a traveling wheel, 9 is an outrigger, 1
0 is a chassis, 11 is a driver's seat, 12 is a crane, 13 and 1
4, 15 and 16 are booms, 17 is a connecting arm, 18 is a connecting base, 19 is a level adjusting device (equilibrium device: electric jack), 20 is an aerial work platform, 23 is a handrail, 26 is an upper contact detection frame, 30 Is a turning device, 34 is a machine side operation panel, 35 is an electric wire cable for operation, 36 is a cable reel, 37 is a cable guide roller, 38 is a remote operation panel, and 40 is an alarm light. In addition, A is a low place getting on and off position, B is a high place getting on and off position, C is a suspension scaffold assembling / disassembling position, and D is a bad construction position.

In the embodiment, the crane device 6 with an aerial work platform is used for aerial work of the dome roof steel frame 1. However, the crane device 6 with aerial work platform 6 is used.
May of course be applied to work at height in other structures. The crane device 6 with an aerial work platform is provided with telescopic booms 13, 14, 15, 16 of the crane 12 of the crane vehicle 7.
An aerial work platform 20 is connected to the distal end of the aerial work via a coupling arm 17 and a coupling base 18, and an electric jack 19 as a balancing device that is a level adjusting device of the aerial work platform 20 is connected.
And a turning device 30, and an upper contact detection frame 26 above the work platform 20 at high places. Next, the configuration of each unit will be described in detail.

That is, the crane vehicle 7 has a driver's seat 11 and a crane 12 mounted on an undercarriage 10 equipped with front, rear, left and right traveling wheels 8, 8, ... And outriggers 9, 9 ,. Then, this driver's seat 11 and crane 12
Is capable of integrally turning on the chassis 10 by driving a turning device (not shown).
Can be raised and lowered by a hydraulic jack (boom cylinder) not shown. In addition, the hoisting angle range of the crane 12 by the hydraulic jack is 0 ° when the hydraulic jack is contracted to the limit and the crane 12 is in a horizontal state.
The hydraulic jack is extended to the limit and the crane 12 is raised up to 75 °.

In the illustrated example, the crane 12 is an expandable / contractible structure composed of four stages of booms 13, 14, 15, 16 and is a maximum with the four stages of booms 13, 14, 15, 16 extended forward. The aerial work platform 20 connected to the tip of the crane 12 has a length of about 45 m.
The height of 40m is reached at an angle of 75 degrees with the maximum height of 2. The aerial work platform 20 includes a connecting arm 17 fixed to the boom 16 at the final stage of the crane 12.
Is mounted on a connecting base 18 pivotally connected to the distal end of the connecting member via a connecting pin 18a (see FIG. 3) via a turning device 30 described later. When connecting the aerial work platform 20 to the crane 12 of the crane vehicle 7, the aerial work platform 20, which has been conventionally loaded on a truck and transported to a work site,
Crane 1 of crane vehicle 7 lifted by another crane
(2) It is rotatably incorporated on a connecting base 18 provided on the most advanced connecting arm 17 as described later. In addition, the connecting arm 17
An electric jack 19 as a balancing device, which is a level adjusting device for the aerial work platform 20, is provided between the connection table 18 and the connection table 18.
Has been erected. By the expansion / contraction operation of the electric jack 19, the connecting base 18 swings with respect to the connecting arm 17 with the connecting pin 18a as a fulcrum, and the work floor surface of the aerial work platform 20 is horizontally adjusted as described later.

As shown in FIGS. 3 to 5, the aerial work platform 20 is provided on the entire surface of a floor frame 21 having a rectangular shape in plan view in which steel materials are assembled vertically and horizontally to prevent falling and slipping. A striped steel plate 22 is adhered to form a work floor, and a handrail 23, which is a vertical and horizontal assembly of steel materials, is provided all around the work floor. The handrail 23 has an opening / closing opening 24 for getting in and out on one short side of the work floor, and an opening / closing door 25 is attached to the opening 24 by a single hinge.
Here, the work floor surface of the aerial work platform 20 is 5.2 m ×
It is about 2.2m, and the maximum load is 1.4t ~
It is about 2.0t. The height of the handrail 23 is
It is about 1.1m from the work floor. Further, the handrail 23 has a structure in which an inner frame is provided inside the outer frame so that a worker does not catch his / her hand due to contact with the outer side.

Furthermore, the upper contact detection frame 2 is attached to the handrail 23.
6 is attached. The upper contact detection frame 26 is
As shown in FIGS. 6 and 7, a pair of contact detection rods 27, 27 extending along both long side portions of the work floor and a pair of contact detection rods 28, 28 extending along both short side portions of the work floor. And four contact detection rods 29, 29, 29, 29 in the vertical direction which are attached to the handrail 23 by connecting these four contact detection rods 27, 27, 28, 28 to each other at a connecting portion. In addition, these four vertical contact detection rods 29, 29, 29,
Contact detection limit switches 42, 42, 42, 42 (see FIGS. 8 to 10), which will be described later, are provided at the connection portions of the handrail 23 and the upper portion of the handrail 23, respectively. Here, the above upper contact detection frame 26 has a height of 85c from the handrail 23.
Therefore, the height from the work floor is
It is about 1.95m.

Next, the turning device 30 will be described. This swivel device 30, as shown in FIGS. 3 to 5,
The electric motor 31 mounted on the coupling base 31, the drive pinion 32 that rotates via the speed reducer 31a by driving the electric motor 31, and the driven gear 33 fixed below the center of the floor frame 21 of the aerial work platform 20. Consists of. The aerial work platform 20 is rotatably coupled to the coupling platform 31 via a vertical shaft (not shown) passing through the driven gear 33 as a center. According to the swivel device 30, the drive pinion 32, which is rotated by the drive of the electric motor 31 via the speed reducer 31a, is meshed with the driven gear 33 fixed to the lower center of the floor frame 21 of the work platform 20 for high places. Therefore, the work table 20 at a high place rotates integrally with the driven gear 33 to perform a turning operation. The above-described turning operation of the work platform 20 by the turning device 30 is as follows.
As shown by the phantom line in FIG. 4, a total angle range of 180 ° is provided for each 90 ° left and right.

The aerial work platform 20 is provided with a machine side operation panel 34 as shown in FIGS. 2 to 5, that is, inside the portion along the long side of the handrail 23, the machine side is provided. An operation panel 34 is attached. As shown in FIGS. 2 and 3, the operation electric wire cable 35 connected to the machine side operation panel 34 is wound around the cable reel 36 attached to the connecting arm 17 so as to be able to be wound / unwound. Further, the operation electric wire cable 35 is, as shown in FIG. 2, the cable guide rollers 37, 37, 37, 37 attached to the four booms 13, 14, 15, 16 respectively.
And is led to the driver's seat 11 side.

Further, the operation electric wire cable 35 is guided to the outside from the driver's seat 11 side and connected to the remote operation panel 38. As shown in FIG. 3, an alarm buzzer 39 and an alarm light 40 are connected to the operation electric wire cable 35. The alarm buzzer 39 is inside the driver seat 11, and the alarm light 40 is in front of the driver seat 11 ( 1 and 2),
Each is equipped. The alarm buzzer 39 and the alarm light 40 constitute a notification device 41.
The alarm buzzer 39 emits an alarm sound continuously or intermittently, and the alarm light 40 lights or blinks, and preferably blinks while rotating.

Next, the contact detection limit switch 42
Will be described. This contact detection limit switch 42
8 to 10, is fixed to a lower portion of a bracket 43 fixed to an upper portion of the handrail 23, and a support piece 44 protruding from the bracket 43 is positioned above the contact detection limit switch 42. doing. This support piece 4
4, a mounting piece 45 fixed to the lower end of the vertical contact detection rod 29 is placed, and the lower end of the contact detection rod 29 penetrates the support piece 44 and projects downward. The lower end of the contact detection rod 29 is in contact with the contact detection limit switch 42.

Then, on both sides of the mounting piece 45 and the support piece 44, the bolts 46 are penetrated to project downward,
Between the nut 47 and the support piece 44 screwed to the lower part,
A compression coil spring 49 is interposed via washers 48, 48 to tighten the lock nut 50. Therefore, an external force acts on the upper contact detection frame 26 from above or from the side, and the vertical contact detection rod 29 elastically ejects the compression coil spring 49, as shown by the phantom lines in FIGS. 8 and 9. When the mounting plate 45 floats up on the support plate 44 while tilting laterally against the force, and when the lower end of the contact detection rod 29 separates from the contact detection limit switch 42, contact detection by the contact detection limit switch 42 is performed. .

Further, as shown in FIG. 6, between the connecting table 18 and the aerial work platform 20, the aerial work platform 2 is installed.
A load cell 51 as a 0 load limit value detecting means is provided. That is, the load cell 51 is installed in the vicinity of the above-mentioned vertical shaft (not shown) that passes through the driven gear 33 of the aerial work platform 20 and the maximum load (1.4 t When it reaches about 2.0t), it is detected that the load has reached the allowable limit value.

In the above, as shown in the control block of FIG. 11, the right turning limit switch 52 and the left turning limit which detect the right turning limit (right 90 °) of the aerial work platform 20 by the turning device 30. A left turn limit switch 53 for detecting (90 ° left) is provided. Then, the front tilt limit switch 54 and the rear tilt limit (5 °) for detecting the front tilt limit (-5 °) of the work floor surface of the aerial work platform 20.
A backward tilt limit switch 55 for detecting Further, the electric jack 19 of the balancing device is provided with the hydraulic jack (boom cylinder) for the crane 1.
Limit the undulation range of 2 to limit the extension of the hydraulic jack (7
An extension limit switch 56 for detecting 5 °) and a contraction limit switch 57 for detecting the compression limit (0 °) of the hydraulic jack are provided.

Further, a limit switch for avoiding an overload (about 4.4 tons or more) of the electric jack 19 due to the action of an eccentric load from the aerial work platform 20, that is, a jack pulling force (4. Pull force limit switch 58 and electric jack 1 for detecting 4 tons or more)
A pushing force limit switch 59 for detecting the jack pushing force of 9 (about 4.4 t or more) is built in the electric jack 19. The pulling force limit switch 58 and the pushing force limit switch 59 constitute an eccentric load limit value detecting means of the balancing device (electric jack 19). In addition, the inclination angle (5
There is also provided an inclinometer 60 for detecting (°, 2 °, 0, ° -2 °, -5 °) and displaying the inclination angle. The inclinometer 60 is built in the machine side operation panel 34, and an inclination display section for displaying the inclination angle is provided on the machine side operation panel 34. The electric jack 19 uses an electric motor with a brake as a drive source, and the electric motor 31 of the turning device 30 also has a brake.

Then, as shown in the control block of FIG. 11, on the machine side operation panel 34, a power source pilot lamp 61 that lights up when the power source is on, a power source ON button 62 for turning on the power source, and all operations. By extending the emergency stop button 63 for making an emergency stop, the automatic control indicator lamp 64 that lights up in the automatic control state, the automatic / manual switch 65 for switching between automatic control and manual operation, and the electric jack 19. The forward tilt button 66, the backward tilt button 67 when the electric jack 19 is contracted, and the ready-to-operate indicator lamp 6 that lights up in the operable state.
8. Machine-side / remote changeover switch 69 for switching between machine-side operation and remote control; right-turn button 70 for turning right by driving the electric motor 31; left-turn button for turning left by driving the electric motor 31 71, power off
A power OFF button 72 for operating is provided. Further, on the remote control panel 38, a power pilot lamp 81, a power ON button 82, an emergency stop button 83, a remote operation enable indicator lamp 84 that lights up in a remote control enabled state, an automatic / manual switch 85, a forward tilt button 86, A backward tilt button 87, a left turn button 88, a right turn button 89 and a power OFF button 90 are provided. Further, a power source and a ground are connected on the remote control panel 38 side. Regarding the operation electric wire cable 35, the cable length from the machine side operation panel 34 to the cable reel 36 is about 5 m, and the cable length from the cable reel 36 to the remote operation panel 38 is about 55 m. Each cable length from 38 to the alarm buzzer 39, the alarm light 40, the power supply and the ground is about 10 m.

Next, the control device for the aerial work platform 20 in the crane device 6 with aerial work platform having the above-described structure will be described. Although not shown, the control device for the aerial work platform 20 includes an automatic balance control device, and mainly performs various controls as described below. (1) The aerial work platform 20 has a maximum load (1.4t-
When the load cell 51 detects that it has reached about 2.0 t), it outputs an alarm and a command to stop the operation to operate the alarm buzzer 39 and the alarm light 40 to give an alarm, and also to the balance device (electric jack) 19 and Swivel 30
The drive of the (electric motor 31) is automatically stopped.

(2) The aerial work platform 20 is rotated left and right by driving the turning device 30 by manually operating the right turning buttons 70, 88 or the left turning buttons 71, 89. When the right turning limit switch 52 or the left turning limit switch 53 detects the right turning limit (right 90 °) or the left turning limit (left 90 °) of the work platform 20 for high places, an operation stop command is issued. The output is performed to automatically stop the driving of the balancing device (electric jack) 19 and the turning device 30 (electric motor 31).

(3) Automatic / manual switch 65, 85
To [Manual] to match the ups and downs of the crane 12 with the forward tilt buttons 66, 86 or the backward tilt buttons 67, 8
By driving the balancing device 19 by manual operation of 7,
By extending and contracting the electric motor 19, the work floor surface of the aerial work platform 20 can be horizontally adjusted within the range of −5 ° of the front inclination limit to 5 ° of the rear inclination limit. And the aerial work platform 2
The front inclination limit (-5 °) or the rear inclination limit (5 °) of the work floor surface of 0 is set by the inclinometer 60 and the front inclination limit switch 54.
Alternatively, when the backward tilt limit switch 55 detects, an alarm and a command to stop the operation are output to operate the alarm buzzer 39 and the alarm light 40 to issue an alarm, and the balance device (electric jack) 19 and the turning device 30 (electric drive). The drive of the motor 31) is automatically stopped.

(4) When the hoisting angle of the crane 12 by the hydraulic jack (boom cylinder) reaches 75 ° (the extension limit of the hydraulic jack) or 0 ° (the contraction limit of the hydraulic jack), the extension limit switch 56 or the extension limit is set. When the limit limit switch 57 detects it, it outputs a command to stop the operation and automatically stops the driving of the hydraulic jack (boom cylinder) of the crane 12.

(5) A jack pulling force (about 4.4 t or more) or a jack pushing force (4. 4 ton) that causes an overload of the electric jack 19 due to the action of an eccentric load from the work platform 20 at a high place.
(About 4 t or more) is detected by the pulling force limit switch 58 or the pushing force limit switch 59 built into the electric jack 19, the operation stop command is output and the driving of the electric jack 19 is automatically stopped.

(6) Automatic / manual switch 65, 85
When [Automatic] is selected, the automatic control display lamp 64 of the machine-side operation panel 34 is turned on, and the automatic balance control device uses the signal of the inclinometer 60 to incline the work floor surface of the aerial work platform 20. The correction is automatically performed within the range of the front inclination angle (-2 °) to the rear inclination angle (2 °) to keep the work floor horizontal. That is, the adjustment starts at ± 2 ° before and after and stops at 0 °.

(7) When the machine-side / remote selector switch 69 is selected to "machine-side" or "remote" on the machine-side operation panel 34, the power is turned off and the machine stops. That is, when the operation position is selected from [machine side] to [remote], the machine side operation panel 34
Power is turned off, the power supply pilot lamp 61 is extinguished, and the remote operation enable lamp 84 of the remote control panel 38 is turned on. Therefore, the operation is started by turning on the power ON button 82 again on the remote control panel 38. When the operation position is selected from [remote] to [machine side], the remote control panel 38
Is turned off, the power supply pilot lamp 81 is extinguished, and the operable display lamp 68 of the machine side operation panel 34 is turned on. Therefore, the operation can be restarted by turning on the power ON button 62 on the machine side operation panel 34 again.

(8) When an obstacle hits the upper contact detection frame 26 mounted on the aerial work platform 20 and any of the contact detection limit switches 42 detects it, an alarm and a command to stop the operation are output, The alarm buzzer 39 and the alarm light 40 are operated to give an alarm, and all the operations are stopped, that is, the balancer (electric jack) 19 and the swinging device 30 (electric motor 31) are driven, and the hydraulic jack (boom) of the crane 12 (boom). Cylinder) drive is automatically stopped.

(9) When the emergency stop buttons 63 and 83 are pushed, an alarm and a command to stop the operation are output, the alarm buzzer 39 and the alarm light 40 are operated to give an alarm, and all operations are stopped, that is, Similarly to the case of the above (8), the driving of the balancing device (electric jack) 19 and the turning device 30 (electric motor 31) and the driving of the hydraulic jack (boom cylinder) of the crane 12 are automatically stopped.

FIG. 1 shows an example of working at high places on the dome roof steel frame 1 using the crane device 6 with a work platform for working at high places having the above structure. , The aerial work platform 20 with the crane 12 of the crane vehicle 7 fixed vertically by the outriggers 9, 9, ...
With the vehicle connected, the operator gets on and off. Also,
For example, as shown at the high-altitude loading / unloading position B, the crane 12 is rotated and extended to position the high-altitude work platform 20 near the dome roof steel frame 1 to perform predetermined high-altitude work, or as shown in the drawing. Then, the work platform 20 is connected to the top of the work scaffolding tower 3, and the worker is allowed to get on and off.

Then, as shown in the suspended scaffolding assembly / disassembly position C, the crane vehicle 7 is moved to another position, or another crane device 6 with an aerial work platform is used to outrigger 9, 9. By extending the crane 12 of the crane vehicle 7 in a vertically fixed state by the ..., The work platform 20 for high places is positioned near the dome roof steel frame 1 to perform the assembly work or the disassembly work of the suspension scaffolding. In this case, the work can be performed with the upper contact detection frame 26 removed as in the illustrated example. Further, as shown by the useless construction position D, the crane vehicle 7 is moved to another position, or by using another crane device 6 with a work platform for aerial work, the outriggers 9, 9, ... By extending the crane 12 of the crane vehicle 7 in the fixed state, the work platform 20 for high places is positioned near the dome roof steel frame 1,
Carry out the prescribed useless construction work. Also in this case, the work can be performed by removing the upper contact detection frame 26 as in the illustrated example.

<Second Embodiment> FIG. 12 shows a second embodiment of a crane device with a work platform for high places as an example to which the present invention is applied. The crane with a work platform for high places is shown in FIG. FIG. 3 is a schematic side view showing an example of work at a high place by the apparatus, in which, as in the case of the first embodiment, 19 is a balancing device (electric jack), 20 is a work platform for high places, and 23.
Is a handrail, 26 is an upper contact detection frame, 30 is a turning device, 101 is a steel frame building, 102 is a climbing guide rail, 103 is a climbing crane, 104 is a main frame, 105 is a lifting roller, and 106 is a crane turning. Reference numeral 107 is a crane arm, 108 is a crane hoisting device (hydraulic jack), and 109 is a crane device with a work platform for high places.

As shown in the figure, a pair of left and right vertical climbing guide rails 102, 102 are attached to the side surfaces of the steel column of the steel structure 101, and along the climbing guide rails 102, 102. The climbing crane 103 vertically moves up and down. The climbing crane 103 includes the climbing guide rails 102, along the vertical direction of the main body frame 104.
A large number of lifting rollers 105 that roll by engaging with 102,
, And a climbing device (not shown) is mounted on the main body frame 104. That is, although not shown, a climbing slider, a lock pin lever and a climbing lever for operation, an upper lock pin cylinder and a lower lock pin cylinder for fixing, an upper lock pin and a lower lock pin, and a climbing cylinder for ascending and descending, etc. It is mounted on the 104.

In this climbing device, a climbing slider is vertically slidably incorporated in the main body frame 104, and the climbing slider and the main body frame 104 are connected by a vertical climbing cylinder (not shown) to form an elevating device. doing.
Further, the main body frame 104 is provided with an upper lock pin cylinder (not shown), and the climbing slider is provided with a lower lock pin cylinder (not shown) to form a fixing device.

As the climbing procedure of the climbing crane 103 described above, first, the lower lock pin cylinder on the climbing slider side is operated by operating the lock pin lever, and the lower lock pin is engaged with a pin engagement not shown on the side surface of the climbing guide rail 102. Insert at the joint. Then, the climbing cylinder is slightly extended by operating the climbing lever. At this time, body frame 1
The upper lock pin cylinder on the 04 side operates, and the upper lock pin is automatically disengaged from a pin engagement portion (a pin engagement portion different from the pin engagement portion) (not shown) on the side surface of the climbing guide rail 102.

Next, when the climbing lever is further operated, the climbing cylinder connecting the main body frame 104 and the climbing slider extends, and the main body frame 104 rises with respect to the climbing slider, that is, the climbing crane 103 rises. Then, when the climbing cylinder extends to a predetermined position and stops,
The upper lock pin cylinder on the body frame 104 side is operated by operating the lock pin lever, and the upper lock pin is inserted into a pin engaging portion (not shown) on the side surface of the climbing guide rail 102. Then, when the climbing lever is operated, the lower lock pin cylinder on the side of the climbing slider operates, and the lower lock pin is automatically disengaged from a pin engaging portion (not shown) on the side surface of the climbing guide rail 102.

Further, the climbing cylinder is contracted to a predetermined length by operating the climbing lever. By repeating the above operation, the climbing crane 1
03 is raised to a predetermined height. In this way, when the climbing crane 103 reaches a predetermined height, the lower lock pin cylinder on the side of the climbing slider is operated by operating the lock pin lever to move the lower lock pin to a pin engaging portion (not shown) on the side surface of the climbing guide rail 102. To insert. At this time, the body frame 10 has already been
The operation of the upper lock pin cylinder on the fourth side causes the upper lock pin to be inserted into the pin engaging portion on the side surface of the climbing guide rail 102, so that the steel frame through the climbing guide rail 102 of the main body frame 104 is provided. A reliable fixed state with respect to the building 101 is obtained. When lowering the climbing crane 103 by the climbing device, the above operation is reversed.

In the climbing crane 103 which moves up and down as described above, the crane turning device 106 is mounted on the body frame 104, the crane turning device 106 is provided with the crane arm 107, and the crane arm 107 and the body frame 104 are provided. A hydraulic jack 108 serving as a crane hoisting device is installed between and. Then, in the same manner as in the first embodiment, the aerial work platform 20 is rotatably assembled and connected to the tip of the crane arm 107 at the central portion, and the aerial work platform 20 and the crane are mounted. An electric jack 19 as the balancing device is installed between the arm 107 and the arm 107. The aerial work platform 20 includes the handrail 23 and the upper contact detection frame 26.
And the swivel device 30 is provided between the crane arm 107 and the crane arm 107.

In this way, the crane device 109 with a work platform for high places using the climbing crane 103 is constructed. According to the crane device 109 with an aerial work platform using the climbing crane 103 as described above, it is possible to perform aerial work as in the case of the first embodiment, and the wall surface of the steel structure 101 can be used. It is possible to perform various work in a large space by moving it up and down along.

<Third Embodiment> FIG. 13 shows a third embodiment of a crane device with a work platform for high places as an example to which the present invention is applied. FIG. 3 is a schematic side view showing an example of work at a high place by the apparatus, in which, as in the case of the first embodiment, 19 is a balancing device (electric jack), 20 is a work platform for high places, and 23.
Is a handrail, 26 is an upper contact detection frame, 30 is a turning device, 111 is a steel structure, 112 is a guide rail for wall traverse, 113 is a climbing crane for wall traverse, 11
Reference numeral 4 is a main body frame, 115 is a traveling carriage for wall crossing, 11
6 is a crane turning device, 117 is a crane arm, 11
Reference numeral 8 is a crane hoisting device (hydraulic jack), and 119 is a crane device with an aerial work platform.

As shown in the figure, a pair of upper and lower lateral wall guide rails 112, 112 are attached to the side surfaces of the steel beam of the steel structure 111, and these wall guide rails 112, 112 are attached. A wall-side traverse climbing crane 113 horizontally moves in the horizontal direction. The climbing crane 113 for wall crossing mounts the main body frame 114 on the traveling cart 115 for wall crossing, and engages with the guide rails 112, 112 for crossing wall along the lateral direction of the traveling cart 115 for wall crossing. A large number of traverse rollers (not shown) that rolls are provided, and a traverse device (not shown) is mounted on the main body frame 114. That is, although not shown, a traverse slider, a lock pin lever and a traverse lever for operation, a front lock pin cylinder and a rear lock pin cylinder for fixing, a front lock pin and a rear lock pin, and a traverse cylinder etc. It is mounted on 114.

In this traverse device, a traversing slider (not shown) is slidably installed in the lateral traveling carriage 115 in the lateral direction, and the traversing slider and the wall traversing traveling carriage 115 are traversed in the lateral direction (not shown). A moving device is configured by connecting with a cylinder for use. In addition, the traveling vehicle for wall traverse 115 is provided with a front lock pin cylinder (not shown), and the traverse slider is provided with a rear lock pin cylinder (not shown) to form a fixing device.
Therefore, the traveling vehicle 115 for wall crossing is also used for the climbing crane 103 in the second embodiment.
In substantially the same manner as the above-described climbing operation, while being able to move along the wall surface transverse guide rail 112,
Steel structure 1 via guide rail 112 for wall traverse
A reliable fixed state for 11 is obtained. The basic technical idea of the wall climbing climbing crane 113 as described above is based on Japanese Patent Application No. 7-
No. 6596.

The wall traverse climbing crane 113 that moves left and right as described above has a crane swinging device 116 mounted on the main body frame 115, and the crane swinging device 116 is equipped with a crane arm 117 and the crane arm 117. Between the body frame 114,
A hydraulic jack 118 as a crane hoisting device is installed. Then, in the same way as in the first embodiment, the aerial work platform 20 is rotatably assembled and connected to the tip end of the crane arm 117 at the center,
An electric jack 19 as the balancing device is installed between the work platform 20 for high places and the crane arm 117. The aerial work platform 20 includes the handrail 23 and the upper contact detection frame 26, and the crane arm 117.
The swivel device 30 is interposed between and.

In this way, the crane device 11 with a work platform for high places using the climbing crane 113 for wall traverse
9 are configured. According to the crane device 119 with a work platform for high places using the climbing crane 113 for wall crossing, it is possible to perform work at high places as in the first embodiment, and of course, a steel structure. By moving in the left-right direction along the wall surface of 111, it is possible to perform various works in a large space.

In each of the above embodiments,
Although the balancing device using the electric jack and the turning device using the electric motor are used, the present invention is not limited to this.
It may be a balancing device using a hydraulic jack or a turning device using a hydraulic cylinder. The shape of the upper contact detection frame is also arbitrary, and it is needless to say that the specific detailed structure can be appropriately changed.

[0059]

As described above, according to the crane device with an aerial work platform according to the invention described in claim 1, the swing device and the balancing device for the aerial work platform connected to the boom tip of the crane and the automatic device therefor are provided. Since the equilibrium control device is provided, in particular, the automatic equilibrium control device can appropriately adjust the height of the work platform at a high position by appropriately driving the equilibrium device according to the hoisting motion of the crane. That is,
The posture of the aerial work platform accompanying the ups and downs of the crane can be easily and reliably maintained in equilibrium, so that safety can be improved.

[0060]

Further, according to the crane apparatus with the aerial work platform according to the first aspect of the present invention, in particular, since the aerial work platform is provided with the contact detection frame, the contact detection frame detects the contact with the building. Thus, it is possible to stop further dangerous movement of the aerial work platform. Further, due to the presence of the contact detection frame, it is possible to protect the worker who gets on the work platform at a high place from above and around. Therefore, the safety can be further enhanced.

[0062] Then, according to the aerial work platform with crane apparatus according to the invention of claim 1, wherein, in particular, informing device to warn the posture and contact detection state of limit state and the contact detection frame of the turning of the aerial work platform Since it is equipped with the alarm device, the fact that the posture and turning of the aerial work platform is in the limit state and the contact detection frame is in the contact detection state indicate that the operator of the aerial work platform or the operator of the crane body has Etc. can be notified and a warning given. Further, at the same time as the notification operation by the notification device, further movement of the work platform for high places can be stopped.

Further, according to the crane apparatus with the work platform for high places according to the second aspect of the present invention, the load limit value detecting means for the work platform for high places, the eccentric load limit value detecting means for the balancing device, and the crane are balanced. Since the equipment and swivel emergency stop means are provided, the fact that the aerial work platform is in the load limit state and the equilibrium device is in the eccentric load limit state are A warning can be given to an operator or the like by a notification device. Further, it becomes possible to stop the movement of the work platform at a high place at the same time as the notification operation by the notification device. By operating the emergency stop means by a worker who has boarded an aerial work platform or an operator of the crane body, it is possible to forcibly stop the operations of the crane, the balancing device, and the turning device. It is effective for avoidance.

[0064]

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a crane apparatus with an aerial work platform as an example to which the present invention is applied, and a schematic side view showing an aerial work example by the crane apparatus with aerial work platform. It is a figure.

FIG. 2 is an enlarged side view of a crane device with an aerial work platform according to the first embodiment of FIG.

FIG. 3 is an enlarged side view showing a work platform of the crane device with a work platform for aerial work of FIG. 2, its swinging device, and a level adjusting device (balance device).

FIG. 4 is a plan view showing a state in which the work platform of FIG. 3 is viewed from above.

5 is a front view showing a state in which the work platform of FIG. 3 is viewed from the opening / closing port side.

FIG. 6 is an enlarged side view showing an upper contact detection frame equipped on the work platform of the crane device with aerial work platform of FIG. 2.

7 is a plan view showing a state where the upper contact detection frame of FIG. 6 is viewed from above. FIG.

8 is an enlarged front view showing the configuration of the contact detection switch portion from the upper contact detection frame in FIG.

9 is a side view of the contact detection switch portion viewed from the side from the upper contact detection frame in FIG.

10 is a bottom view of the contact detection switch portion of FIG. 8 viewed from below.

11 is a block configuration diagram showing control of a machine side operation panel, a remote operation panel, a turning device, a level adjusting device (balance device), various detection switches and the like of the work platform of the crane device with the aerial work platform of FIG. is there.

FIG. 12 is a view showing a second embodiment of a crane device with an aerial work platform as an example to which the present invention is applied,
It is a schematic side view which showed the example of high-place work by the crane apparatus with the high-place work base.

FIG. 13 is a view showing a third embodiment of the crane device with aerial work platform as an example to which the present invention is applied,
It is a schematic side view which showed the example of high-place work by the crane apparatus with the high-place work base.

[Explanation of symbols]

6 Crane device with work platform for high places 7 Crane vehicle 11 Driver's seat 12 Cranes 13, 14, 15, 16 Boom 17 Connecting arm 18 Coupling platform 19 Level adjusting device (equilibrium device: electric jack) 20 Work platform for high altitude 23 Handrail 26 Upper part Contact detection frame 30 Slewing device 31 Electric motor 32 Drive pinion 33 Driven gear 34 Machine side operation panel 35 Operation wire cable 36 Cable reel 37 Cable guide roller 38 Remote operation panel 39 Alarm buzzer 40 Alarm light 41 Notification device 42 Contact detection limit switch 51 load limit value detecting means (load cell) 52 right turning limit switch 53 left turning limit switch 54 forward tilt limit switch 55 rear tilt limit switch 56 hydraulic jack (boom cylinder) extension limit switch 57 oil Shrinkage limit switch for pressure jack (boom cylinder) 58 Pulling force limit switch for electric jack (balance device) 59 Pushing force limit switch for electric jack (balance device) 60 Inclinometer 61 Power pilot lamp 62 Power ON button 63 Emergency stop means (Emergency stop button) 64 Automatic control indicator lamp 65 Automatic / manual switch 66 Forward tilt button 67 Backward tilt button 68 Operable display lamp 69 Machine side / remote selector switch 70 Right turn button 71 Left turn button 72 Power off Button 81 Power Pilot Lamp 82 Power ON Button 83 Emergency Stop Means (Emergency Stop Button) 84 Remotely Operable Display Lamp 85 Auto / Manual Switch 86 Forward Tilt Button 87 Back Tilt Button 88 Left Turn Button 89 Right Turn Button 90 Power Off Button 10 Climbing guide rail 103 climbing cranes 109 aerial work platform with crane apparatus 112 wall traversing guide rail 113 wall traversing for climbing cranes 115 wall transverse traveling carriage 119 aerial work platform with crane device

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B66F 11/04 B66F 11/04 E04G 1/22 E04G 1/22 1/24 1/24 21/14 21/14

Claims (2)

(57) [Claims] 1. A balance work device for connecting and installing an aerial work platform to the boom tip of a crane, and adjusting the work platform in a substantially horizontal posture, and a swivel operation for the aerial work platform. A swivel device, an automatic balance control device for automatically adjusting a substantially horizontal posture of the work platform at high altitude by driving the balance device, and a contact detection frame for detecting a contact from above and around. In the crane device with an aerial work platform provided, for detecting the contact state of the attitude and turning limit state of the aerial work platform and the contact detection frame, for notifying and warning the limit state and the contact detection state. A crane device with an aerial work platform, which is equipped with an alarm device. 2. A load limit value detecting means for detecting an allowable limit value of a load on the work platform for high places, and an eccentricity for detecting an allowable limit value of an eccentric load acting on the balancer by a load on the work platform for high places. Load limit value detection means, and, according to the detection of the load limit value by the load limit value detection means and the detection of the eccentric load limit value by the eccentric load limit value detection means, the notification by the notification device is performed. The crane device with an aerial work platform according to claim 1, further comprising an emergency stop means for forcibly stopping the operation of the crane and the operations of the balancing device and the turning device.