Work Support Device

Abstract

To provide a work support device allowing a simple work such as a tape cure to be performed on a solar cell module without installing a large-scaled appliance in front of a solar power generation array.SOLUTION: A work support device 20 comprises a pair of support poles 22 arranged near and behind of a solar power generation array 1 while arranged at an interval in a longitudinal direction of the solar power generation array 1, a pole fixing tool 23 for fixing the pair of support poles 22 and a main rope 29 detachably attached to a main rope metal fitting 22a provided at the support pole 22 and stretched between the pair of support poles 22.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] This invention relates to a work support device that can be used for work on solar cell modules (e.g., tape curing work) in a solar power generation array in which multiple solar cell modules are arranged vertically and horizontally at a predetermined tilt angle on a support frame, and in particular to a work support device for fastening a safety belt worn by a worker. [Background technology]

[0002] Typically, a solar power generation array consists of multiple solar cell modules arranged vertically and horizontally at a predetermined inclination angle on a support frame installed outdoors. However, in areas with a large amount of iron powder, such as industrial zones, iron powder accumulates and adheres to the solar cell modules, causing a problem of reduced power generation performance (see Non-Patent Document 1). For this reason, solar power generation arrays installed in such areas must periodically clean the surfaces of the solar cell modules (to remove the adhered iron powder). To remove the iron powder, a strong acidic chemical must be used. This chemical is classified as specially controlled industrial waste and must be recovered after cleaning. For this reason, before cleaning the solar cell modules, tape is used to seal the gaps between the modules. This tape covering work can be done from the ground if the solar array is in a low location, but if the solar array is in a high location that is out of reach, it is necessary to climb up onto the solar cell module to do the work.

[0003] Therefore, in the past, as shown in Figure 10, rails 41 were laid along the longitudinal direction of the solar power generation array 1 just before the front edge where the height of the solar power generation array 1 becomes lower (in front of the support frame 3), and a dedicated movable scaffolding 40 was movably installed on this laid rail 41. In addition, a work board 42 was hung across the front and rear of the solar cell module 2 (in the short direction of the solar power generation array 1), and the lanyard of the safety belt worn by the worker was moored to the movable scaffolding 40, after which the worker stood on the work board 42 and performed tape curing work.

[0004] This tape curing work is performed by gradually moving the movable scaffolding 40 and work plate 42 from one side of the solar power generation array 1 to the other in the longitudinal direction, but the movable scaffolding 40 is used not only for the tape curing work but also for the cleaning work of applying a chemical to the panels and washing off the iron particles on the panels, so when there are a large number of panels, the movable scaffolding 40 is moved in one direction to perform the tape curing work in a section, and after the tape curing in this section is completed, the movable scaffolding 40 is moved in the opposite direction to perform the cleaning work in the process (washing the panels with water, then applying a chemical to the panels to remove the iron particles on the panels, and finally rinsing with water again). The chemicals and water used in the cleaning are collected in a gutter 43 provided below the front edge of the panel. [Prior art documents] [Patent documents]

[0005] [Non-Patent Document 1] “Restoring power generation efficiency by cleaning solar panels”, [online], Energia Solutions and Services Co., Ltd., [Retrieved October 4, 2021], Internet<https: / / www.e-ess.co.jp / common / pdf / 20210105news.pdf?202102> Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the past, the solar cell modules were moved back and forth on a movable scaffold in sections to alternate between tape protection and cleaning work, which meant that one work could not be done while the other was being done, resulting in poor work efficiency. This inconvenience is caused by the need to use mobile scaffolding for both tape curing and cleaning work. The work of applying chemicals to remove iron powder and the work of washing with water require appropriate equipment, making the use of mobile scaffolding essential, but if tape curing, which is a relatively simple task, could be done without the use of mobile scaffolding, it would be possible to completely separate the tape curing work and cleaning work, and cleaning work could be done while tape curing work was being carried out, improving work efficiency.

[0007] The present invention was made in consideration of the above circumstances, and its main objective is to provide a work support device that can perform simple work such as tape protection work on solar cell modules without installing large-scale equipment in front of the solar power generation array (without installing movable scaffolding that moves on rails). [Means for solving the problem]

[0008] In order to achieve the above object, a work assistance device according to the present invention is used in a solar power generation array in which a plurality of solar cell modules are installed at a predetermined tilt angle on a support frame, and is a work assistance device that assists work on the solar cell modules, a pair of support poles arranged in close proximity to the rear of the solar power generation array and spaced apart in a longitudinal direction of the solar power generation array; a pole fixing device for fixing each of the pair of support poles; A life rope that is detachably attached to a life rope mounting bracket provided on the support pole and is installed between the pair of support poles; The present invention is characterized by the following:

[0009] Therefore, the worker can install a work support device behind the solar power generation array and hang a work board in the front-to-back direction over the solar cell module.When working on this work board, the worker can attach the lanyard of the safety belt he is wearing to the main rope installed between a pair of support poles, and can work (tape curing work) safely on the solar cell module as before. Therefore, since tape curing work can be performed without using large-scale dedicated mobile scaffolding, tape curing work can be performed continuously for all sections that require cleaning without waiting for cleaning work in other sections, and cleaning work can also be performed continuously using dedicated mobile scaffolding for sections where tape curing work has been completed, which makes it possible to improve work efficiency.

[0010] Here, the pole fixing device may comprise a base member that is installed on the concrete foundation of the support frame and fixes the lower end of the support pole, and a pole mid-region fixing member that fixes the middle of the support pole to the support frame. With this configuration, the support pole can be firmly fixed to the base member and support frame installed on the concrete foundation.

[0011] The pole fixture may also be one that detachably fixes the support pole at three points on the support frame. For example, if the support frame has a beam member (horizontal member) supported substantially horizontally in the longitudinal direction and multiple support members (main members) fixed to it at an angle substantially perpendicular to the beam member, the pole fixture may be fixed to the beam member (horizontal member) and to adjacent support members (main members) located on both sides of the fixing point on the beam member.

[0012] Specifically, such a pole fixing device includes a first rod member to which the lower end of the support pole is fixed at one end and which extends substantially perpendicular to the support pole, a first mounting plate fixed to the other end of the first rod member and bolted to a beam member extending in the longitudinal direction of the support frame, connecting members fixed to the first mounting plate and extending from the first mounting plate to both sides in the longitudinal direction of the support frame, and connecting members fixed to both ends of the connecting members and First Mounting Plate The support pole may also be constructed of second and third mounting plates that can be bolted to a pair of support members extending in the short direction of the support frame, approximately perpendicular to the second and third mounting plates, and second and third rod members that are installed on the support pole from the vicinity of the second and third mounting plates of the connecting member.

[0013] With this configuration, there is no need for a base member to be installed on the concrete foundation, making it possible to reduce weight.In addition, it becomes easier to transport the pole fixing device and to attach and detach it from the support frame, further improving work efficiency. [Effects of the Invention]

[0014] As described above, the work support device of the present invention makes it possible to perform simple tasks such as tape protection on solar cell modules without using a dedicated movable scaffold that moves on rails laid in front of the support frame, and in the series of tasks for cleaning solar cell modules (tape protection work, cleaning work), each task can be performed consecutively in all sections to be worked on without waiting for other tasks, thereby improving work efficiency. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 shows a state in which a work support device according to the present invention is installed behind a solar power generation array, where (a) is a view of the solar power generation array from the front (front), and (b) is a view of the solar power generation array from the rear (back). [Figure 2] FIG. 2 is a side view of the work support device installed behind the solar power generation array. [Figure 3] FIG. 3 is a perspective view showing an example of a master rope holder that constitutes the work support device. [Figure 4] FIG. 4 is a diagram showing an installation state of a work support device using the life rope holder shown in FIG. 3, and is a perspective view of the photovoltaic power generation array as seen obliquely from behind. [Figure 5] FIG. 5 is a perspective view illustrating a state in which work (tape covering work) is being performed on a solar cell module. [Figure 6] FIG. 6 is a diagram showing another example of a life rope holder constituting a work support device, where (a) is a front view thereof, (b) is a side view thereof, and (c) is a perspective view thereof. [Figure 7] FIG. 7 is a perspective view showing the state in which the life rope holder shown in FIG. 6 is attached to a support frame of a photovoltaic power generation array. [Figure 8] FIG. 8 is a diagram illustrating the state in which the mounting plate is attached to the side of the opening of the C-beam. [Figure 9] FIG. 9 is a diagram showing an installation state of a work support device using the life rope holder shown in FIGS. 6 and 7, and is a perspective view seen from diagonally behind the photovoltaic power generation array. [Figure 10] FIG. 10 is a diagram illustrating conventional work using a movable scaffold, where (a) is a view from the front of the solar power generation array, and (b) is a view from the side of the solar power generation array. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0017] 1 and 2 show a schematic configuration of a solar power generation array 1, and this solar power generation array 1 is configured by mounting a plurality of solar cell modules 2 aligned lengthwise and widthwise on a support frame 3.

[0018] The support frame 3 supports the solar cell modules 2 while maintaining their light-receiving surfaces at a predetermined inclination angle relative to the horizontal plane and is composed of multiple frame elements. In this example, the support frame 3 includes two beam members (horizontal members) 4, 5 arranged approximately horizontally at a distance from each other, and multiple support members (main members) 6 arranged above the beam members 4, 5, parallel to each other and perpendicular to each of the beam members 4, 5. One beam member 4 is fixed to a high-leg support 8 erected on a concrete foundation 7 arranged at a predetermined distance in the longitudinal direction of the solar power generation array 1, and the other beam member 5 is fixed to a low-leg support 10 erected on a concrete foundation 9 arranged at a predetermined distance in the longitudinal direction of the solar power generation array 1. To stably support the solar cell modules 2, each solar cell module 2 is placed on a pair of support members 6, and the upper surfaces of each pair of support members 6 form the support surfaces for the solar cell modules 2. In such a solar power generation array 1, a work support device 20 for supporting work on the solar cell module 2 is disposed behind (rear of) the solar power generation array 1 in the vicinity thereof.

[0019] First Embodiment The work support device 20 is configured by hanging a main rope 29 between a pair of main rope holders 21 arranged at a predetermined interval along the longitudinal direction of the photovoltaic power generation array 1 (the left-right direction in FIG. 1). Specifically, the main rope holder 21 is made up of a pair of support poles 22 spaced apart along the longitudinal direction of the solar power generation array 1 and a pole fixing device 23 that fixes the pair of support poles 22 in a predetermined position, and the main rope 29 is installed between the pair of support poles 22 by removably attaching the main rope 29 to a main rope mounting bracket 22a provided on the support pole 22.

[0020] 3 and 4, the support pole 22 is made of, for example, a steel pipe having dimensions such that its upper end is higher than the highest point of the rear edge of the solar power generation array 1. In this example, the pole fixing device 23 that fixes the support pole 22 includes a base member 24 that is placed on the concrete foundation 7 of the support frame 3 and fixes the lower end of the support pole 22, and a pole intermediate region fixing member 25 that fixes the middle of the support pole 22 to the support frame 3.

[0021] The base member 24 is, for example, a frame-like structure made of C-section steel members arranged lengthwise and widthwise and placed on the foundation so as not to interfere with the high-leg support column 8. The lower ends of the support poles 22 are fixed to the base member 24 by welding, fasteners, or the like. In this example, the base member 24 is composed of a pair of main steel members 24a arranged in parallel and extending forward and backward on both sides of the high-leg support column 8, a locking steel member 24b extending approximately perpendicular to the main steel members 24a so as to span the lower sides of the main steel members 24a and lock onto the rear edge of the concrete foundation 7, and a spacing adjustment steel member 24c extending approximately perpendicular to the main steel members 24a midway between the pair of main steel members 24a so as to span the upper sides of the main steel members 24a. The pole fixing device 23 also includes a cane member 26 that diagonally connects the middle of the support pole 22 to the base member 24 to reinforce the upright state of the support pole 22.

[0022] The pole intermediate area fixing member 25 is composed of a mounting adapter 25a that is bolted to the beam member 4 fixed to the high-leg support 8, and a steel pipe 25b, for example, one end of which is fixed to the mounting adapter 25a by welding or mounting hardware, etc., and the other end of which is fixed to the middle of the support pole 22 by welding or mounting hardware, etc. The main rope mounting bracket 22a provided at the upper end of the support pole 22 is attached directly to the support pole 22 by welding, or to a member attached to the support pole.

[0023] When using the above work support device 20 to perform tape curing work prior to cleaning work of the solar cell modules 2, a pair of life rope holders 21 are installed behind the solar power generation array 1 at a desired interval, and the life rope 29 is moored between the life rope support fittings 22a attached to the support poles 22 of the pair of life rope holders 21 to construct the work support device 20. Here, the life rope holder 21 can be installed by forming a base member 24 to which the support pole 22 and cane members 26 are fixed in advance, transporting it to the site and placing it on the foundation 9, and then erecting the pole intermediate region fixing member 25 between the beam member 5 and the support pole 22; however, because the base member 24 is relatively large, it is preferable to assemble the entire life rope holder 21, including the base member, on site.

[0024] 5, the worker drapes a work board 42 over the tilted solar cell modules 2 in the front-to-back direction (short direction) of the solar power generation array 1, stands on this work board 42, and anchors the lanyard 46 of the safety belt 45 he is wearing to the main rope 29 of the work support device 20. He then uses masking tape 47 to perform protective work to seal the gaps between the solar cell modules 2. This tape protective work is performed manually by the worker within reach from the work board 42, or by leaning slightly over the solar cell modules 2 from the work board 42 and then performing the tape protective work. Thereafter, the worker detaches the lanyard 46 of the safety belt 45 from the main rope 29, descends to the ground, moves the position of the work board 42, and then stands on the work board 42 again, anchors the lanyard 46 to the main rope 29, and repeats the tape protective work. This type of work is carried out from one end of the section in which the main rope holders 21 of the solar power generation array 1 are installed to the other end, and once this section is completed, a pair of main rope holders 21 are installed in the next section (if it is an adjacent section, only one of the main rope holders 21 on the side farthest from the adjacent section is moved to the end of the next section), the main rope 29 is erected in this section, and then the tape curing work is carried out in the same manner.

[0025] Therefore, the tape curing work does not need to be interrupted in order to perform the cleaning work, and can be performed continuously on all of the solar cell modules 2 to be cleaned (all sections to be cleaned). Furthermore, during the cleaning work, the sections that are covered with tape can be cleaned sequentially and continuously using the conventional movable scaffolding 40 (see FIG. 10) independently of the tape curing work. Therefore, tape curing work can be carried out in advance over the entire section without using movable scaffolding, so tape curing work is no longer necessary when working using movable scaffolding, making it possible to improve work efficiency.

[0026] Incidentally, in the above work, it is necessary to sequentially move the work support device 1 and set it up in different sections, so it is preferable that the life rope holder 21 (pole fixing device 23) be configured so that the installation section can be easily changed (configured so that it is easy to carry and detach). Also, the above-mentioned configuration is equipped with a base member 24 that is placed on the concrete foundation 7 and a pole intermediate region fixing member 25 that is fixed to the support frame 3 (beam member 4), so the installation work takes time and is heavy, and there is room for improvement in terms of increasing work efficiency. Therefore, it is preferable that the life rope holder 21 (pole fixing device 23) serving as the work support device 1 is lightweight and has a standard configuration that allows it to be easily installed on the support frame 3.

[0027] Second Embodiment 6 and 7 show such configuration examples, and the main rope holder 21 of this work support device 1 is configured such that the pole fixing device 23 fixes the lower end of the support pole 22 to one end thereof, a first rod 31 extending substantially perpendicular to the support pole (substantially perpendicular to the high-leg support 8 and the beam member 4), a first mounting plate 32 fixed to the other end of this first rod 31 and bolted to the beam member 4 extending in the longitudinal direction of the support frame 3, and a first mounting plate 32 fixed by welding or the like to an upwardly extending portion 32a of this first mounting plate 32, and the first mounting plate 32 is fixed to the support frame 3 by bolts. The support frame 3 is made up of a connecting member 33 extending horizontally on both sides of the longitudinal direction of the support frame 3, second and third mounting plates 34, 35 which are provided at both ends of the connecting member 33 and can be bolted to a pair of support members 6 (adjacent support members 6 located on both sides of the fixing point of the mounting plate 32 of the beam member 4 to which the first mounting plate 32 is fixed) which extend in the short direction of the support frame 3, approximately perpendicular to the first mounting plate 32, and second and third rods 36, 37 which are installed on the support pole 22 from near the second and third mounting plates of the connecting member 33.

[0028] When the first mounting plate 32 and the second and third mounting plates 34, 35 are attached to the closed side of the C-shaped steel beam member 4 and support member 6, which are C-shaped steel beams, they can be directly fixed using existing mounting bolts 50 and nuts 51. However, when they are attached to the open side of the C-shaped steel, as shown in Figure 8, long through-nuts 52 can be attached to the existing mounting bolts 50, and then they can be fixed to these long through-nuts 52 using bolts 53. Furthermore, the main rope mounting bracket 22a attached to the upper end of the support pole 22 is preferably provided on both the left and right sides of the support pole 22 so that it can accommodate whether the support pole 22 of the paired main rope holder 21 is installed on the left or right side. In addition, the cross-sectional shape, thickness, and material of the rods, connecting members, and mounting plates used in the main rope holder 21 should be selected appropriately so as to fall within the allowable stress, taking into consideration the weight acting on each part and the load when a worker tows the safety belt on the main rope.

[0029] Therefore, with this configuration, in addition to being able to obtain the same effects as in the first embodiment, the life rope holder 21 shown in Figure 6 can be prepared in advance using the support pole 22, the first to third rods 31, 36, 37, the first to third mounting plates 32, 34, 35, and the connecting member 33, and this life rope holder 21 can be easily installed on the support frame 3 by transporting it to the site and removably attaching it to the beam members 4 and support members 6 with bolts. Also, when changing the installation position of the life rope holder 21 on a section-by-section basis, the installation location can be changed simply by attaching and detaching it with bolts, and moreover, since there is no need for a base member as in embodiment 1, the life rope holder 21 can be made lighter and easier to carry. [Explanation of symbols]

[0030] 1. Solar power array 2. Solar cell modules 3 Support stand 4,5 Beams (horizontal members) 6 Supporting member (main material) 7,9 Concrete foundation 20 Work support device 22 Support pole 22a Lifeline mounting bracket 23 Pole fixing device 24 Base member 25 Pole intermediate area fixing member 29 Main rope 31 First Bar 32 First mounting plate 33 Connecting material 34 Second mounting plate 35 Third mounting plate 36 Second Bar 37 Third Bar

Claims

1. 1. A work assistance device used in a solar power generation array in which a plurality of solar cell modules are installed on a support frame at a predetermined tilt angle, the work assistance device assisting work on the solar cell modules, a pair of support poles arranged in close proximity to the rear of the solar power generation array and spaced apart in a longitudinal direction of the solar power generation array; a pole fixing device for fixing each of the pair of support poles; A life rope that is detachably attached to a life rope mounting bracket provided on the support pole and is installed between the pair of support poles; Equipped with the pole fixing device detachably fixes the support pole to the support frame at three points, The pole fixing device is composed of: a first rod member to which the lower end of the support pole is fixed at one end and which extends approximately perpendicular to the support pole; a first mounting plate fixed to the other end of the first rod member and bolted to a beam member extending in the longitudinal direction of the support frame; connecting members fixed to the first mounting plate and extending from the first mounting plate to both sides in the longitudinal direction of the support frame; second and third mounting plates fixed to both ends of the connecting member and capable of being bolted to a pair of support members extending in the lateral direction of the support frame approximately perpendicular to the first mounting plate; and second and third rod members installed on the support pole from the vicinity of the second and third mounting plates of the connecting member. A work support device characterized by:

2. The work support device described in Claim 1, characterized in that the first, second and third mounting plates are attached to the C-shaped steel that constitutes the support frame, and when attached to the closed side of the C-shaped steel, they are fixed with existing mounting bolts and nuts, and when attached to the open side of the C-shaped steel, long through-nuts are attached to the existing mounting bolts and fixed to these long through-nuts with bolts.

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