JP6464535B2 - Mobile work scaffold - Google Patents

Description

  The present invention relates to a mobile work scaffold which is installed in a concrete formwork and used mainly in a concrete placing process including surface leveling work.

  Conventionally, in the concrete placing process, a scaffold (hereinafter referred to as an outer periphery fixed scaffold) is installed on the outer periphery of the concrete formwork, and a worker performs compaction work or placement using a vibrator on the outer periphery fixed scaffold. The concrete was leveled (see, for example, Patent Document 1).

JP 2005-127079 A

  However, if the concrete placement section has a large flat area and the distance from the outer periphery fixed scaffold to the center of the concrete placement section is large, it is difficult for the worker to perform work on the outer periphery fixed scaffold. In some cases, it was necessary to work inside the formwork.

  On the other hand, in the case of a reinforced concrete structure in which reinforcing bars are placed in the formwork, a method of working while temporarily fixing the scaffolding plate on the reinforcing bars in the working range and removing the scaffolding in the finished range as needed However, this method has a problem that it takes time and labor to install and remove the scaffolding board.

  In addition, in the case of an unreinforced concrete structure such as a breakwater superstructure, there is a problem that the reinforcing bars are not arranged in the formwork and the scaffolding plate cannot be installed.

  Therefore, in view of such a conventional problem, the present invention has been made for the purpose of providing a mobile work scaffold that can move on a concrete casting formwork.

The feature of the invention according to claim 1 for solving the conventional problems as described above is a movable work scaffold that is movable on a mold having opposing weir plates, and both ends are supported by the mold. And a plurality of parallel rails installed between the opposing weir plates, a pedestal movably installed on the plurality of rails, and the adjacent weirs disposed between the adjacent rails. It is in a mobile work scaffold provided with a rail spacing holding member constructed between plates .

  According to a second aspect of the present invention, in addition to the structure of the first aspect, the gantry includes a moving body that moves on the rail, and the moving body is a guide roller disposed on a side portion of the rail. It is in having.

  According to a third aspect of the present invention, in addition to the configuration of the second aspect, the guide roller is disposed only on the outer side or the inner side of the pair of parallel rails.

The mobile work scaffold according to the present invention is a case where there is no reinforcing bar or the like for installing the scaffold in the formwork as in the case of an unreinforced concrete structure by providing the configuration according to claim 1. In addition, a scaffold can be provided at a desired position on the formwork, deformation of the formwork can be prevented, the distance between the rails can be kept constant, and the concrete can be compacted while the worker is on the mount. It is possible to perform leveling work or the like, or to work at a desired position in the mold without walking on the upper surface of the placed concrete. Further, unlike the structure in which the scaffolding plate is supported by a reinforcing bar or the like disposed in the conventional formwork, it is not necessary to install and remove the scaffolding plate for each work, and the work can be performed efficiently.

  Moreover, in this invention, it can prevent that a mount frame derails from a rail by comprising the structure of Claim 2.

  Furthermore, in the present invention, by providing the configuration according to claim 3, the gantry can smoothly move on the rail while preventing derailment.

It is a top view which shows an example of the usage condition of the mobile work scaffold which concerns on this invention. It is an AA arrow directional cross-sectional view same as the above. FIG. 2 is a partially enlarged plan view showing a moving body portion in FIG. It is a side view same as the above. It is a CC sectional view taken on the line. (A) and (b) are each a sectional view taken along line BB in FIG. 1 for explaining the mode of the driving means of the mobile work scaffold according to the present invention.

  Next, an embodiment of the mobile work scaffold according to the present invention will be described based on the embodiment shown in FIGS. In the figure, reference numeral 1 denotes a formwork, reference numeral 2 denotes concrete, and reference numeral 3 denotes a mobile work scaffold installed on the formwork 1.

  The mold 1 is composed of a plurality of support columns (vertical butter materials) 4a, 4a,... Installed in the circumferential direction of the mold frame 1 and a horizontal flap made of a round steel pipe straddling the support columns 4a, 4a,. Are provided with form plates that are held on the inside of the columns 4a, 4a ... through the horizontal flap material 4b, and are arranged in four directions by the upright dam plates 5, 5 ... A rectangular frame is enclosed.

  The pillars 4a, 4a ... are composed of members such as channel steel, H-shaped steel, rectangular steel pipes, etc., and are built at intervals in the circumferential direction of the mold, and straddle between the adjacent pillars 4a, 4a. A panel is held, and a dam plate 5 that closes one of the molds 1 is formed.

  The form of the formwork panel is not particularly limited, but it is preferable to use a formwork panel having a high rigidity such as a steel formwork panel such as metal foam.

  In addition, although not particularly illustrated, a separator is disposed between barrier plates (formwork panels) facing each other so as to resist a lateral pressure acting when the concrete 2 is placed.

  In addition, the outer periphery fixed scaffold 6 and the handrails 7,7 ... supported by the outer periphery fixed scaffold 6 are provided in the outer peripheral part of the upper part of this formwork 1. As shown in FIG.

  As shown in FIGS. 1 and 2, the mobile work scaffold 3 is supported by a pair of parallel rails 8, 8 laid across opposing weir plates, and movably supported by the rails 8, 8. A gantry 9 and driving means for moving the gantry 9 are provided, and the gantry 9 can move along the rails 8 and 8 above the mold 1.

  In addition, the mobile work scaffold 3 includes a beam-like rail spacing member 10 which is provided between the rails 8 and 8 and is installed between the center portions of the upper end edges of the opposing weir plates 5 and 5. Are fixed to the upper edge portions of the weir plates 5 and 5 facing each other.

  The rail spacing member 10 supports the upper end edges of the opposing weir plates 5, 5... Against the side pressure acting on each weir plate 5, 5. By preventing the bending and distortion of 5, the distance between the rails 8, 8 disposed across the opposing weir plates 5, 5 is maintained. In addition, you may use this rail space | interval holding | maintenance material 10 also as the width | variety stop material for molds.

  The rails 8 and 8 are made of H-shaped steel or the like having a certain length, and are formed in a beam shape including a belt-like track 8a on which at least the gantry 9 is supported.

  The rails 8 and 8 are arranged so as to straddle the mutually facing weir plates 5 and 5 with a certain interval, and both ends thereof are placed on the beam material spanned on the columns 4a, 4a. ing.

  The gantry 9 includes a pair of moving bodies 11 and 11 that move on the rails 8, and a gantry body 12 that is supported by the both moving bodies 11 and 11, and can move along the rails 8 and 8. Yes.

  The gantry body 12 is formed in a planar band shape having a certain width, and is provided with handrails 13 and 13 on the front and rear sides, and an operator moves on the gantry body 12 to perform each work in the concrete placing process and its assistance. It can be done.

  As shown in FIGS. 3 to 5, each moving body 11 includes mounting frames 14 and 14 fixed to both sides of the gantry body 12, a skirt portion 15 fixed to the lower ends of the mounting frames 14 and 14, and a skirt. Wheels 16 and 16 disposed in the portion 15 are provided, and can be moved on the tracks 8a of the rails 8 and 8 via the wheels 16 and 16.

  The mounting frame 14 is made of L-shaped steel or the like, and is fixed to the side surface of the gantry body 12 with bolts or the like.

  The skirt portion 15 is made of channel steel or the like, and includes a top plate 15a fixed to the lower end of the mounting frame 14 by welding or the like, and a pair of side plates 15b and 15b suspended from both side edges of the top plate 15a. Wheels 16 are rotatably supported on the lower surface of the top plate 15a.

  Each moving body 11 is supported by a mounting frame 14 in a direction crossing the rail 8, and is supported by both ends of the roller support 17 and is disposed on the side of the rails 8 and 8. The guide rollers 18 are moved in a state of being guided by the side surfaces of the rails 8 and 8, and the derailment of the gantry 9 is prevented.

  The guide rollers 18, 18... Include a rotation shaft 18a suspended from both ends of the mounting frame 14, and a cylindrical roller body 18b rotatably supported by the rotation shaft 18a. The outer peripheral surface is in contact with the side surface of the rail 8, and the rail 8 is gripped by the guide rollers 18 and 18.

  In addition, you may arrange | position the guide rollers 18, 18 ... only to the outer side or the inner side of the rails 8 and 8 which mutually adjoin. In that case, since the guide rollers 18, 18... Are guided only on one side with respect to the rails 8, 8, they can move smoothly while preventing derailment.

  For example, as shown in FIG. 6A, one end of the driving means is connected to the gantry body 12, and the other end is supported by the upper end of the mold 1 (in this embodiment, the handrail 7 portion of the outer periphery fixed scaffold 6). The moving rope 20 is folded back via the pulley 19, and the operator on the gantry 9 pulls the moving rope 20, so that the gantry 9 is moved by being pulled by the moving rope 20. .

  Further, as shown in FIG. 6B, the driving means is provided with a winch 21 on the gantry 9 and the tip of the wire 22 fed out from the winch 21 is moved to the upper end of the mold 1 in the moving direction (in this embodiment, a handrail). 7), and the gantry 9 may be moved by the winding operation of the winch 21.

  In the mobile work platform 3 configured as described above, the platform 9 can be moved on the rails 8 and 8 by the driving means, and the worker can move on the platform 9. Even if it does not enter, it can work at a desired position on the mold 1.

  Therefore, the worker can perform the concrete compaction work, the leveling work, etc. in a state of being mounted on the mount 9 at a desired position on the mold 1 or without walking on the placed concrete 2. It is possible to work at a desired position in the mold 1.

  Furthermore, this mobile work scaffold 3 can be applied even when there is no reinforcing bar capable of installing a scaffolding plate in the formwork, such as an unreinforced concrete structure, and the scaffolding plate can be applied to the reinforcing bars in the formwork. Unlike the case of installing the scaffolding, it is not necessary to remove the scaffolding plate every work, so that the work can be performed efficiently.

  In the above-described embodiment, the example in which the gantry 9 is supported by the pair of rails 8 and 8 has been described, but the number of rails may be three or more.

  In the above-described embodiment, the example in which the rail spacing member 10 is provided in parallel to the rails 8 and 8 has been described. However, the rail spacing is maintained between the dam plates 5 and 5 facing each other in the direction intersecting with the rails 8 and 8. A width stop material for the mold may be installed separately from the material 10.

  In the above-described embodiment, the mold frame surrounded on the four sides by the dam plate has been described as an example. However, the mold frame may be provided with at least two dam plates facing each other, for example, existing concrete. When the concrete is placed continuously with the existing concrete structure using the end surface of the structure, the barrier plate may be disposed so as to surround two or three surfaces facing each other.

1 Formwork 2 Concrete 3 Mobile work scaffold 4 Strut (vertical material)
5 Formwork panel 6 Peripheral fixed scaffold 7 Handrail 8 Rail 9 Base 10 Rail spacing holding material 11 Moving body 12 Base body 13 Handrail 14 Mounting frame 15 Skirt portion 16 Wheel 17 Roller support 18 Guide roller 19 Pulley 20 Moving rope 21 Winch 22 wires

Claims (3)

A mobile work scaffold that is movable on a formwork having opposing weir plates,
Both ends are supported by a formwork, a plurality of parallel rails that are spanned between the opposing weir plates, a platform that is movably constructed on the plurality of rails, and the adjacent rails A movable work scaffold comprising: a rail spacing holding member disposed between the opposing weir plates .   The mobile work scaffold according to claim 1, wherein the gantry includes a moving body that moves on the rail, and the moving body includes a guide roller disposed on a side portion of the rail.   The movable work scaffolding according to claim 2, wherein the guide roller is disposed only on the outside or the inside of the pair of parallel rails.

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