JP6605098B2 - Work platform for aerial work platforms - Google Patents

Description

  The present invention relates to a work table for an aerial work vehicle.

When working at a construction site in civil engineering construction, a temporary scaffolding is assembled from a stable ground surface to an upper working position, and workers work by moving up and down the stairs provided in the temporary scaffolding (Patent) Reference 1).
Alternatively, an aerial work vehicle is prepared, and a work table on which an operator is boarded is moved up and down to a work position by a lifting device (see Patent Document 2).

JP-A-11-210231 JP 2013-14418 A

However, temporary scaffolds are constructed by assembling various members such as building frames, pipe materials, braces, treads, handrails, stairs, etc. from the ground surface to the upper work position. However, there is a disadvantage that costs increase.
On the other hand, when using an aerial work platform, the cost can be reduced compared to using a temporary scaffold, but the work platform must be raised and lowered each time the height of the work position is changed. It is difficult to work at a position above the upper limit position, and there is room for improvement in improving work efficiency.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a work platform for an aerial work vehicle that is advantageous in improving work efficiency while reducing the cost required for work in high places. It is in.

In order to achieve the above-mentioned object, the present invention is a work platform for an aerial work vehicle that is attached to a lifting device that can be lifted and lowered, and the lifting device is connected to the lower surface of the work table and a handrail is erected around it A floor portion and a pedestal provided on the floor portion, the pedestal is provided on an area smaller than the area of the floor portion; The pedestal is formed on a plurality of floors by pillars and beams, has a stairway for ascending and descending from the floor portion to the beams constituting each floor, and the beam of the beams constituting the plurality floors A floor board is installed on the beam constituting the top floor, handrails are erected so as to surround the floor board, the floor portion has a rectangular shape in plan view, and the platform is a plane of the floor portion. Presents a rectangular shape with a short side shorter than the short side of the rectangular shape. The long side of the rectangle forming the plan view shape of the gantry is parallel to the long side of the rectangular shape forming the plan view of the floor portion, and the short side of the rectangle forming the plan view shape of the gantry is the floor The handrail is composed of a plurality of pillars erected from the beams constituting the top floor, and a plurality of elongated members spanned between the pillars. The outlines of the plurality of elongated members that are configured and surround the floor plate exhibit a rectangular shape in plan view having a shorter side than a rectangular short side that forms a plan view shape of the gantry, and the gantry includes the floor A long side shorter than the long side of the rectangle forming the planar view of the part, and the base has one long side of the two long sides of the rectangle forming the planar view of the base, the floor part Is placed close to one of the two long sides of the rectangle that forms the shape of the plan view The passage includes the other long side of the two long sides of the rectangle forming the plan view shape of the gantry and the other long side of the two long sides of the rectangle forming the plan view shape of the floor portion. And between the two rectangular short sides forming the plan view shape of the gantry and the two rectangular short sides forming the plan view shape of the floor portion, One long side of two long sides of the rectangle forming the plan view shape of the gantry arranged close to one long side of the two long sides of the rectangle forming the plan view shape of The long side of one of the two long sides of the rectangular shape of the plan view that forms the outline of the elongated member matches the long side of the rectangular shape of the gantry when viewed in plan. In one long side portion of the rectangular shape in plan view forming the outline of the plurality of elongated members, a plurality of components constituting the gantry are formed. A plurality of pillars are provided so as to extend above the beams constituting the top floor to constitute the pillars .

According to the present invention, it is advantageous to perform various types of high-altitude work within a range of heights over a plurality of floors without raising and lowering the work table by the elevating device, thereby improving the efficiency of the high-altitude work.
Further, when the work table is raised to the highest position by the lifting device, the work can be performed at a high place because the platform has a plurality of floors even at a high place that cannot be reached by a conventional work table.

It is a front view of a work bench for an aerial work vehicle according to an embodiment. It is AA sectional view taken on the line of FIG. It is a top view of the work bench for an aerial work vehicle which concerns on embodiment. FIG. 4 is a perspective view of a work platform for an aerial work vehicle as viewed from the direction of arrow B in FIG. 3. It is a block diagram which shows the structure of the control system of the work platform for an aerial work vehicle which concerns on embodiment. It is an operation | movement flowchart of the work platform for an aerial work vehicle which concerns on embodiment.

Hereinafter, the present embodiment will be described with reference to the drawings.
First, an aerial work vehicle will be described.
As shown in FIG. 1, an aerial work vehicle 10 includes a vehicle body (not shown) that travels on the ground, a boom 12 that is provided on the vehicle body and is supported to be raised and lowered, and a boom 12 that is raised and lowered (not shown). A plurality of hydraulic cylinders, and a workbench 14 connected to the tip of the boom 12.

The work table 14 is moved up and down by raising and lowering the boom 12. Therefore, in the present embodiment, the lifting device is configured by the boom 12 and each of the hydraulic cylinders.
The lifting device is not limited to the configuration using the boom 12 and the hydraulic cylinder, and a scissor link configured by swingably coupling a plurality of arm members, and a hydraulic cylinder that expands and contracts the scissor link. Various conventionally known lifting devices such as a scissor-link lifting device composed of the above can be used.

As shown in FIGS. 1 to 5, the work table 14 includes a floor 16, a gantry 18, an operation unit 20, and an object alarm device 22.
As shown in FIGS. 1 to 4, the floor portion 16 includes a frame 24 assembled in a rectangular frame shape by an elongated member, a plurality or one floor plate 26 provided on the frame 24, and a periphery of the floor plate 26. It is comprised by the handrail 28 erected.
Various conventionally known members such as an H-shaped steel can be used as the elongated member, but using a lightweight member is advantageous in reducing the weight of the gantry 18.
In the present embodiment, as shown in FIG. 3, a reinforcing member 30 that reinforces the frame 24 is provided inside the frame 24, and the tip of the boom 12 is connected to the reinforcing member 30 via the leveling device 13. It is connected. When the boom 12 is raised and lowered, the leveling device 13 is configured so that the work table 14 is always kept in a horizontal state. The leveling device 13 only needs to keep the work table 14 in a horizontal state when the boom 12 is raised and lowered, and various conventionally known structures can be employed.

As shown in FIG. 3, the gantry 18 is provided on an area smaller than the area of the floor portion 16, and the place of the floor portion 16 excluding the gantry 18 serves as a passage 32 where the worker P goes back and forth.
Specifically, the floor 16 has a rectangular shape, and the gantry 18 has a rectangular shape in plan view, and more specifically, has a rectangular shape in plan view.
The gantry 18 is arranged such that one of the two long sides of the rectangular shape in plan view is brought close to one of the two long sides of the rectangular shape of the floor portion 16.
The passage 32 is formed between the other long side of the two long sides of the rectangular shape of the gantry 18 and the other long side of the two long sides of the rectangular shape of the floor 16, and the gantry It is provided between two short sides of the 18 rectangular rectangles in plan view and two short sides of the floor portion 16.
Therefore, the gantry 18 can be arranged close to the place where the work is performed at a high position in a long range in the lateral direction (long range in the long side direction), which is advantageous in efficiently performing the work on each floor of the gantry 18. .
Further, since the passage 32 can be moved in the long side direction and the short side direction of the floor portion 16, it is advantageous in improving the usability of the floor portion 16.
Further, since the outline of the gantry 18 in plan view is smaller than the contour of the floor portion 16, the gantry 18 can be positioned in a space narrower than the contour of the floor portion 16.
Therefore, the space for working at a high place is a narrow space sandwiched between two opposing wall portions or a narrow space surrounded by a plurality of wall portions, and the normal work table 14 cannot enter. Even in such a case, the gantry 18 can be positioned in a narrow space, and in this state, the worker P can work from the gantry 18 at a high place, which is advantageous in improving work efficiency.

As shown in FIGS. 1 to 4, the gantry 18 is formed on a plurality of floors by pillars 34 and beams 36, and is formed on the third floor in the present embodiment, and moves up and down from the floor portion 16 to the beams 36 constituting each floor. A staircase 38 is provided.
Various conventionally known members such as a square steel pipe can be used for the pillar 34 and the beam 36, but a square or circular hollow steel made of a lightweight metal material such as an aluminum alloy, or a synthetic material having light weight and strength and rigidity. Use of a hollow rectangular tube, circular tube, or the like made of a resin material is advantageous in reducing the weight of the gantry 18.
A plurality of the pillars 34 are erected along a pair of long sides and a pair of short sides that are rectangular in plan view.
The beam 36 spans a plurality of pillars 34 along a pair of long sides and a pair of short sides that are rectangular in plan view, and between the opposing pillars 34 provided on the pair of long sides as necessary. It is stretched over.
On four surfaces of each floor of the gantry 18, braces 40 are bridged in a cross shape in a plurality of rectangular openings formed by the columns 34 and the beams 36. By providing the brace 40, the brace 40 functions as a worker fall prevention member, and at the same time, the strength and rigidity of the gantry 18 are enhanced.

As shown in FIG. 4, a floor plate 42 is installed on a beam 36 on the third floor constituting the top floor among the beams 36 constituting a plurality of floors, and a handrail 44 is erected so as to surround the periphery of the floor plate 42. ing.
In this embodiment, as shown in FIGS. 1 and 2, a plurality of columns 34 constituting the gantry 18 are provided so as to extend above the beam 36 on the third floor, and constitute a column 4402 of the handrail 44. Yes.
The handrail 44 includes a plurality of struts 4402 and a plurality of elongated members 4404 spanned between the struts 4402.
Therefore, the handrail 44 functions as a worker fall prevention member, which is advantageous for ensuring the safety of work on the top floor.

  As shown in FIG. 4, the operation unit 20 is attached to a mounting member (not shown) erected from the floor 16 (FIG. 1), and is operated by an operator P on the floor 16 to operate the operation unit 20. Each of the hydraulic cylinders is actuated to raise and lower the boom 12 so that the work table 14 is raised and lowered.

As shown in FIG. 5, the object alarm device 22 includes a plurality of monitoring cameras 46, a worker detection unit 48, a sound generation unit 50, and a control unit 52.
The monitoring camera 46 constitutes an object detection unit, and is provided on the work table 14 and detects an object in the space on the side and upper side of the gantry 18.
In the present specification, the object refers to an object such as a structure positioned on the side or above the gantry 18.

In the present embodiment, as shown in FIGS. 1 to 4, one monitoring camera 46 is provided at each of the handrails 28 of the floor 16 at locations near both ends of the two long sides of the floor 16. Further, one of the three handrails 44 constituting the uppermost floor of the gantry 18 is provided at a position near both ends of the two long sides of the gantry 18. Accordingly, a total of eight surveillance cameras 46 are provided, four on the handrail 28 of the floor 16 and four on the handrail 44 on the top floor of the gantry 18. Note that the number and attachment positions of the monitoring cameras 46 are appropriately determined according to the size and shape of the gantry 18.
Each monitoring camera 46 can image a range of 360 degrees centering on the optical axis extending upward in the vertical direction, and can image within a range of 180 degrees centering on the optical axis in a plane including the optical axis. The captured image data is supplied to the control unit 52.
Although the range that can be imaged by the monitoring camera 46 is not limited to the above-described angle range, a wide area can be imaged by the single monitoring camera 46 without causing a blind spot as in the present embodiment. Therefore, it is advantageous for reliably monitoring the object.

The worker detection unit 48 detects that the worker P is on the gantry 18 and supplies the detection result to the control unit 52.
The worker detection unit 48 only needs to cover all the places where the worker P can enter in the gantry 18, and various known human sensations using infrared rays, ultrasonic waves, visible light, etc. as the worker detection unit 48. A sensor can be used, and one or more human sensors may be provided.
Further, as the worker detection unit 48, a camera and an image processing unit that determines the presence or absence of the worker P based on image information captured by the camera may be provided.

The sound generation unit 50 generates a predetermined warning sound or a warning announcement sound based on the control of the control unit 52.
As such an audio generation unit 50, for example, an audio signal generation circuit that generates an audio signal, an amplifier that amplifies the audio signal, and a speaker that rings based on the amplified audio signal may be used. is there.

The control unit 52 includes a CPU, a ROM that stores and stores a control program, a RAM as an operation area of the control program, an EEPROM that holds various data in a rewritable manner, an interface unit that interfaces with peripheral circuits, and the like. Composed.
The control unit 52 functions as an approach determination unit 52A and an alarm generation unit 52B by executing the control program.

The approach determination unit 52A determines whether or not an object has entered a predetermined approach warning area based on the detection result of each monitoring camera 46. Specifically, the approach determination unit 52A is imaged by the monitoring camera 46. Whether or not an object has entered the approach warning area is determined by performing image processing on the obtained image information.
The approach warning area is an area where there is a high possibility of contact or collision between the gantry 18 and the object when the object enters the area.
Therefore, when an object enters the approach warning area, it is necessary to operate the work table 14 in a direction away from the object so that the work table 14 and the object do not approach each other. It is preferable that the worker P is withdrawn from the gantry 18 to the floor 16.

In the present embodiment, the approach determination unit 52A sets the approach alert area as the first approach alert area when the worker detector 48 does not detect the worker P, and the worker detector 48 detects the worker P. Is detected, the approach warning area is a second approach warning area that includes the first approach warning area and is wider than the first approach warning area.
Therefore, when there is a worker P on the gantry 18, a wider range of approach warning area is used than when the gantry 18 does not have the worker P, which is advantageous in determining the approach of the object earlier. It becomes.

  The alarm generation unit 52B generates an alarm when the approach determination unit 52A determines that an object has entered the approach warning area. In the present embodiment, by controlling the sound generation unit 50, Generate a warning sound or warning message.

Next, the work at a high place using the work table 14 will be described.
Prior to the aerial work using the aerial work vehicle 10, the aerial work vehicle 10 is moved to the ground directly below the work position and parked.
Then, one or more workers P board the work table 14 and move to the floor 16 or the gantry 18.
In this state, the worker P operates the operation unit 20 of the work table 14 to raise and extend the boom 12 to raise the work table 14 and stop it at a desired work position. The worker P moves between the floor portion 16 and a plurality of floors and performs a height work at a desired height position.
Therefore, it is advantageous to perform various types of high-altitude work within a range of heights over a plurality of floors without raising and lowering the work table 14 by the boom 12 and improving the efficiency of high-level work.
Further, when the tip end of the boom 12 is set to the highest position, the platform 18 has a plurality of floors even at a high place that cannot be reached by the conventional work table 14, so that work at a high place can be performed.
Further, when a temporary scaffolding is installed on the site and working at a high place, it is necessary to assemble the scaffolding while avoiding unstable ground parts, which is troublesome. On the other hand, in this embodiment, it is sufficient to secure a parking space for one vehicle on the ground surface that can stably park the aerial work vehicle 10 and raise and lower the work table 14. This is advantageous for improving efficiency.

Next, the operation when the work table 14 is raised will be described with reference to the flowchart of FIG.
First, the aerial work vehicle 10 is moved to the ground directly below the work position and parked.
Then, the worker P gets on the work table 14 and moves to the floor 16 or the gantry 18.
In this state, the worker P operates the operating unit 20 of the work table 14 to raise and lower the boom 12 by raising and lowering the boom 12 (step S10).
The worker detection unit 48 detects whether there is a worker P on the gantry 18 (step S12).
When the worker P is not detected on the gantry 18, the approach determination unit 52A sets the first approach alert area as the approach alert area (step S14).
When the worker P is detected on the gantry 18, the approach determination unit 52A sets a second approach warning area wider than the first approach warning area as the approach warning area (step S16).
Then, the approach determination unit 52A determines whether or not the object has entered the approach warning area based on the image information supplied from each monitoring camera 46 (step S18).
If it is determined in step S18 that the object has not entered the approach warning area, the process returns to step S12 and the same control is repeated.

If it is determined in step S18 that the object has entered the approaching warning area, the warning generator 52B generates a warning sound or warning announcement from the voice generator 50, and performs careful ventilation of the worker P (step S20).
In response to the generation of the warning sound or the warning announcement, the worker P operates the operation unit 20 to cause the boom 12 to fall down or shorten, thereby separating the gantry 18 from the object. Thereby, the approach with the mount frame 18 and a target object can be avoided.
In addition, the worker P who has been on the gantry 18 can go down the stairs 38 from the gantry 18 to the floor 16 in response to the occurrence of a warning sound or a warning announcement.

In the present embodiment, the approach determination unit 52A has a wider range of approach alert areas than the first approach alert area and the first approach alert area depending on whether the worker detection unit 48 detects the worker P. It is set to one of the second approach warning areas.
Therefore, when there is a worker P on the gantry 18, a wider range of approach warning area is used than when the gantry 18 does not have the worker P, which is advantageous in determining the approach of the object earlier. It becomes.
Therefore, the closer the distance between the gantry 18 and the object, the earlier the warning is generated, which is advantageous for the operator P to operate the operation unit 20 to avoid the approach between the gantry 18 and the object. This is advantageous for quickly retracting the worker P from the gantry 18 to the floor 16 on the gantry 18 close to the object.
In addition, when there is no worker P on the gantry 18, the approach caution area is set to the first approach caution area that is narrower than the second approach caution area, thereby allowing the gantry 18 and the object to approach to some extent. This is advantageous in ensuring a wide range in which high-level work can be performed by the worker P on the floor 16.

Note that the approach determination unit 52A determines approach of an object using a single approach alert area without switching and setting the approach alert area between the first approach alert area and the second approach alert area. It may be.
However, according to the present embodiment, the alarm generation timing can be changed in accordance with the presence or absence of the worker P on the gantry 18, and the approach of the object can be accurately performed while improving the efficiency of work at a high place. This is advantageous for warning.

  Further, in the present embodiment, as the object detection unit, it is possible to image a 360 degree range centering on the optical axis extending upward in the vertical direction, and centering on the optical axis in a plane including the optical axis. Since the monitoring camera 46 capable of imaging in the range of 180 degrees is used, each monitoring camera 46 can detect a target object covering a wide range. Therefore, the number of monitoring cameras 46 can be reduced, which is advantageous in accurately determining the presence / absence of the approach between the gantry 18 and the object while simplifying the configuration of the approach determination unit 52A.

Of course, millimeter wave radar, microwave radar, and infrared radar may be used as the object detection unit in addition to the monitoring camera 46, or these radars may be used instead of the monitoring camera 46.
Use of such a radar is advantageous in reliably detecting an object even at night or when the field of view is poor due to the influence of fog or the like.
However, since the detection range of the radar is narrower than that of the surveillance camera 46 capable of photographing a wide range as in the present embodiment, a large number of radars are used to cover the upper and side of the gantry 18 over a wide range. It is necessary to provide it.
On the other hand, when the monitoring camera 46 capable of photographing a wide area is used as the object detection unit as in the present embodiment, the object can approach the gantry 18 over a wide area while minimizing the number of the monitoring cameras 46. This can be accurately detected, which is advantageous in reducing the cost of the work table 14.

  DESCRIPTION OF SYMBOLS 10 ... Work vehicle at high place, 12 ... Boom, 14 ... Work table, 16 ... Floor part, 18 ... Mount, 22 ... Object warning device, 26 ... Floor board, 28 ... Handrail, 32 ... ... passages, 34 ... pillars, 36 ... beams, 38 ... stairs, 40 ... braces, 42 ... floor boards, 44 ... handrails, 46 ... surveillance cameras (object detection unit), 48 ... workers Detection unit, 50... Voice generation unit, 52... Control unit, 52 A.

Claims (3)

A work platform for an aerial work vehicle that is attached to a lifting device that can be lifted and lowered.
A floor portion on which the elevating device is connected to the lower surface and handrails are erected around the floor; and
A gantry provided on the floor,
The pedestal is provided on an area smaller than the area of the floor, and the place of the floor excluding the pedestal is a passage where workers come and go,
The mount is formed on a plurality of floors by pillars and beams, and has stairs for ascending and descending from the floor to the beams constituting each floor,
A floor board is installed on the beam constituting the top floor among the beams constituting the plurality of floors, and a handrail is erected so as to surround the floor board,
The floor portion has a rectangular shape in plan view,
The gantry presents a rectangular shape in plan view having a short side shorter than a short side of the rectangular shape in plan view of the floor,
The long side of the rectangle that forms the plan view of the gantry is parallel to the long side of the rectangle that forms the plan view of the floor, and the short side of the rectangle that forms the plan view of the gantry is the floor portion. Parallel to the short side of the rectangle forming the planar view shape of
The handrail is composed of a plurality of pillars erected from the beams constituting the top floor, and a plurality of elongated members spanned between the pillars,
The outlines of the plurality of elongated members surrounding the floor board have a rectangular shape in plan view having a shorter side than a rectangular short side forming the shape in plan view of the gantry,
The gantry has a long side shorter than the long side of the rectangle forming the planar view shape of the floor,
The gantry has one long side of the two long sides of the rectangle forming the plan view shape of the gantry as one long side of the two long sides of the rectangle forming the plan view shape of the floor portion. Placed in close proximity,
The passage includes the other long side of two long sides of the rectangle forming the plan view of the gantry and the other long side of the two long sides of the rectangle forming the plan view of the floor portion. And between the two short sides of the rectangle forming the plan view shape of the gantry and the two short sides of the rectangle forming the plan view shape of the floor,
When viewed in plan, the two long sides of the rectangle forming the plan view shape of the gantry arranged close to one long side of the two long sides of the rectangle forming the plan view shape of the floor portion One long side and one long side of the two long sides of the rectangular shape in plan view forming the outline of the plurality of elongated members are matched,
When viewed from above, a plurality of pillars constituting the gantry are disposed at one long side of the rectangular shape in plan view that outlines the plurality of elongated members that coincide with one long side of the rectangular shape in plan view of the gantry. Is provided to extend above the beam constituting the top floor and constitutes the support column,
A work platform for an aerial work vehicle characterized by that. On the four surfaces of each floor of the pedestal, braces are laid across a rectangular opening formed by the pillars and beams,
Workbench for aerial vehicle of claim 1 Symbol mounting, characterized in that. An operation part for performing the lifting and lowering operation of the workbench is provided at a position of the workbench that can be operated by a worker on the floor.
The work platform for an aerial work vehicle according to claim 1 or 2, wherein

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