Conveyance device, reinforcement conveyance device, and reinforcement conveyance method

Abstract

To provide a conveyance device, a reinforcement conveyance device, and a reinforcement conveyance method characterized by low cost and suitability for the usage environment of field work.SOLUTION: A conveyance device 1 comprises: a screw node reinforcement 10 having a thread on an outer peripheral surface 11; a cylindrical advancing / retreating member 60 engaged on an inner peripheral surface 60a with the thread of the screw node reinforcement 10; a long member 12 provided side by side with the screw node reinforcement 10; a spacer member 70 provided so as to be movable along the long member 12; a suspension shackle 61 provided in the advancing / retreating member 60 to connect the advancing / retreating member 60 and the spacer member 70; a drive source 21 that rotates the screw node reinforcement 10; and a support 72 provided in the spacer member 70 to support an object to be conveyed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a conveying device, a reinforcing bar conveying device, and a reinforcing bar conveying method. [Background technology]

[0002] Patent document 1 describes a reinforcing bar arrangement device that hoists a placement means on which a bundle of reinforcing bars is placed, transports it to a reinforcing bar arrangement location, and then drops the reinforcing bar from the placement means at the reinforcing bar arrangement location to arrange the reinforcing bar at the reinforcing bar arrangement location. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 09-105232 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, in the placement of rebar in a large-scale reinforced concrete structure, the rebars are large in size, and manual transportation places a heavy burden on the workers, so a conveying device as in the above-mentioned conventional technology can be used to reduce the burden and to perform the work efficiently. However, typical conveying devices use mechanisms such as linear guides that are easily affected by dust, and are therefore unsuitable for use at civil engineering and construction sites due to their poor durability. In addition, such mechanisms tend to be expensive.

[0005] An object of the present invention is to provide a low-cost conveying device, a reinforcing bar conveying device, and a reinforcing bar conveying method that are suitable for use in on-site work environments. [Means for solving the problem]

[0006] A conveying device according to one embodiment of the present invention comprises a threaded rebar having a screw thread on its outer peripheral surface, a tubular advancing / retracting member whose inner peripheral surface screws into the screw thread of the threaded rebar, a long member arranged in parallel along the threaded rebar, a moving section arranged to be movable along the long member, a connecting member provided on the advancing / retracting member and connecting the advancing / retracting member to the moving section, a driving source for rotating either the threaded rebar or the advancing / retracting member, and a support section provided on the advancing / retracting member or the moving section for supporting the object to be conveyed.

[0007] In the conveying device according to one aspect of the present invention, when the driving source rotates either the threaded rebar or the advancing / retreating member, the advancing / retreating member advances and retreats along the threaded rebar. Since the advancing / retreating member and the moving part are connected by a connecting member, when the advancing / retreating member advances and retreats along the threaded rebar, the moving part moves along the long member. Thus, the conveying object supported by the support part is conveyed according to the advancement and retreat of the advancing / retreating member or the movement of the moving part. As described above, by using the threaded rebar and using rod material or the like as the long member, the conveying device according to one aspect of the present invention is constructed at low cost and is less susceptible to the influence of dust, etc. Therefore, compared to the case where a linear guide or the like is used, the conveying device according to one aspect of the present invention has less durability problems at civil engineering and construction sites, etc., and is low-cost and suitable for the use environment of on-site work.

[0008] Another aspect of the present invention is a rebar conveying device for conveying reinforcement bars that intersect with a plurality of main bars extending in the vertical direction in the reinforcement of a reinforced concrete structure, the rebar conveying device comprising: a threaded rebar having a screw thread on its outer peripheral surface; a tubular advancing / retreating member whose inner peripheral surface screws into the screw thread of the threaded rebar; a long member arranged in parallel along the threaded rebar; a moving section arranged to be movable along the long member; a connecting member arranged on the advancing / retreating member and connecting the advancing / retreating member and the moving section; a driving source for rotating either the threaded rebar or the advancing / retreating member; and a support section arranged on the moving section and supporting an object to be conveyed. A plurality of conveying devices are installed in the arrangement range of the reinforcement bars with the threaded rebar extending along the main bars, and in each of the plurality of conveying devices, the support section supports the reinforcement bars as the object to be conveyed, the driving source advances and retreats the advancing / retreating member relative to the threaded rebar, and the moving section moves along the long member while being connected to the advancing / retreating member to convey the reinforcement bars.

[0009] In the reinforcing bar conveying device according to another aspect of the present invention, when the driving source rotates either the screw-knotted reinforcing bar or the advancing / retracting member, the advancing / retracting member advances and retreats along the screw-knotted reinforcing bar. Since the advancing / retracting member and the moving part are connected by a connecting member, when the advancing / retracting member advances and retreats along the screw-knotted reinforcing bar, the moving part moves along the long member. Here, a plurality of conveying devices are installed in the arrangement range of the reinforcing bars with the screw-knotted reinforcing bars extending along the main bars. Also, in each of the plurality of conveying devices, the reinforcing bars are supported by the supporting part. Therefore, in response to the movement of the moving part, the reinforcing bars can be conveyed in the vertical direction while being supported in a direction intersecting the multiple main bars extending in the vertical direction. As described above, by using the screw-knotted reinforcing bar and using rod material or the like as the long member, the device can be constructed at low cost and is less susceptible to the influence of dust, etc. Therefore, the reinforcing bar conveying device according to another aspect of the present invention has less durability problems at civil engineering sites and construction sites, etc., compared to the case where a linear guide or the like is used, and is low-cost and suitable for the use environment of field work.

[0010] In one embodiment, the moving part is a tubular member having an engaging part on its side that engages with the connecting member, and the connecting member may maintain the connection with the moving part by the weight of the moving part acting on it when it is engaged with the engaging part, and may release the connection with the moving part by the weight of the moving part no longer acting on it when it is engaged with the engaging part. In this case, for example, the weight of the moving part acting on the connecting member when the retractable member is advanced to transport the reinforcing bar to a predetermined position is no longer acting on the connecting member, so that the connection between the moving part and the moving part is automatically released. Thus, the moving part supporting the reinforcing bar can be left behind, and the moving part can be retracted.

[0011] In one embodiment, a control unit may be provided that controls the drive sources of the multiple transport devices to synchronize with each other. In this case, the reinforcement bars can be moved in parallel in the vertical direction while maintaining the extension direction of the reinforcement bars.

[0012] Yet another aspect of the present invention is a rebar transport method for transporting distribution bars that intersect multiple main bars extending in the vertical direction in the reinforcement of a reinforced concrete structure, the method comprising: an installation step of installing multiple transport devices in a range where the distribution bars are arranged with the threaded rebar extending along the main bars, the installation step using a transport device including a threaded rebar having a screw thread on its outer peripheral surface, a tubular advancing / retreating member whose inner peripheral surface screws into the screw thread of the threaded rebar, a long member arranged in parallel along the threaded rebar, a moving section arranged to be movable along the long member, a connecting member provided on the advancing / retreating member and connecting the advancing / retreating member and the moving section, a driving source that rotates either the threaded rebar or the advancing / retreating member, and a support section provided on the moving section and supporting an object to be transported; a support step of supporting the distribution bars as an object to be transported on the support section of each of the multiple transport devices; and a moving step of moving the advancing / retreating member by the driving source relative to the threaded rebar, and moving the moving section connected to the advancing / retreating member along the long member, in each of the multiple transport devices.

[0013] In the reinforcing bar conveying method according to yet another aspect of the present invention, when the driving source rotates either the screw-knotted reinforcing bar or the advancing / retracting member, the advancing / retracting member advances and retreats along the screw-knotted reinforcing bar. Since the advancing / retracting member and the moving part are connected by a connecting member, when the advancing / retracting member advances and retreats along the screw-knotted reinforcing bar, the moving part moves along the long member. Here, a plurality of conveying devices are installed in the arrangement range of the reinforcing bars in a state where the screw-knotted reinforcing bar extends along the main reinforcing bars. In each of the plurality of conveying devices, the reinforcing bars are supported by a support part. Therefore, in response to the movement of the moving part, the reinforcing bars can be conveyed in the vertical direction while being supported in a direction intersecting the multiple main reinforcing bars extending in the vertical direction. As described above, by using the screw-knotted reinforcing bar and using a rod material or the like as the long member, the reinforcing bar conveying method according to yet another aspect of the present invention is constructed at low cost and is less susceptible to the influence of dust, etc. Therefore, compared to the case where a linear guide or the like is used, the reinforcing bar conveying method according to yet another aspect of the present invention reduces the impairment of durability at civil engineering sites and construction sites, etc., and is low-cost and suitable for the use environment of on-site work. Effect of the Invention

[0014] According to the present invention, the drawbacks of durability at civil engineering sites, construction sites, and the like can be reduced, and costs can be reduced to suit the usage environment of on-site work. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a side view illustrating the transport device according to the first embodiment. [Diagram 2] 1A is a plan view illustrating an example of the structure of the upper fixing part, and FIG. 1B is a plan view illustrating an example of fixing an elongated member by the upper fixing part. [Diagram 3] 11 is a plan view illustrating the structure of a lower fixed part. FIG. [Figure 4] 11 is a plan view showing the relationship between a connecting member and a moving portion. FIG. [Diagram 5] 13A to 13C are side views showing an example of the operation of the connecting member. [Figure 6] 1A is a schematic plan view showing a first arrangement example of a plurality of transport devices, FIG. 1B is a schematic plan view showing a second arrangement example of a plurality of transport devices, and FIG. 1C is a schematic plan view showing a third arrangement example of a plurality of transport devices. [Figure 7] 1 is a flowchart showing an example of a reinforcing bar transport method. [Figure 8] FIG. 11 is a side view illustrating a conveying device according to a second embodiment. [Figure 9] 10A is a side view illustrating a conveying device according to a third embodiment, and FIG. 10B is a side view illustrating a conveying device according to a fourth embodiment. [Figure 10] 10(a) is a side view illustrating a conveying device according to a fifth embodiment, and (b) is a partial cross-sectional view taken along line bb in FIG. [Figure 11] FIG. 13 is a side view illustrating a conveying device according to a sixth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are given the same reference numerals, and duplicated description will be omitted.

[0017] FIG. 1 is a side view illustrating a conveying device according to a first embodiment. The conveying device 1 is a device for conveying an object to be conveyed along a predetermined conveying direction. The conveying device 1 according to the first embodiment is configured as a reinforcing bar conveying device for conveying reinforcing bars in the reinforcement of a reinforced concrete structure, for example. The reinforcement of a reinforced concrete structure means reinforcement for constructing walls and columns of a skeleton having a plurality of main reinforcements extending in the vertical direction and distribution reinforcements intersecting the main reinforcements. The distribution reinforcements are reinforcing bars arranged to extend in a lateral direction (for example, a horizontal direction) intersecting the vertical direction. The extension directions of the main reinforcements and distribution reinforcements may be inclined from the vertical direction and the horizontal direction.

[0018] For example, when the reinforced concrete structure is a large-scale structure such as a nuclear power structure, the distribution bars are heavy and have a large diameter (e.g., D51, etc.), and it is a great burden for workers to hold and place them manually. Therefore, the conveying device 1 shown in Fig. 1 is used to arrange the reinforcement bars of a reinforced concrete structure by repeatedly supporting the distribution bars (object to be conveyed) 2 on the support parts 72 at the top of a previously assembled scaffold and conveying the distribution bars 2 downward to a predetermined height.

[0019] [Configuration of the transport device (rebar transport device)] The conveying device 1 comprises a screw-jointed rebar 10, a driving unit 20, a long member 12, an upper fixed part 40, a lower fixed part 50, a moving member 60, a hanging shackle (connecting member) 61, and a spacer member (moving part) 70.

[0020] The threaded rebar 10 is a long rod-like rebar with a thread (thread-like joint) formed on the outer circumferential surface 11. The threaded rebar 10 is generally used as a rebar that can connect the threaded rebars 10 to each other via a mechanical joint. The threaded rebar 10 here is used as a rail that converts the driving force of the drive source 21 into the conveying force of the conveying device 1 by utilizing the thread on the outer circumferential surface 11 and moves the advancing and retracting member 60 forward and backward. The threaded rebar 10 can have a thickness that takes into account the load acting according to the dimensions and number of the reinforcing bars 2 to be conveyed. The threaded rebar 10 can have a length of up to 12 m per piece, and the length is determined according to the arrangement position of the reinforcing bars 2.

[0021] As an example, the threaded rebar 10 is arranged so as to extend linearly in the up-down direction (transport direction). The transport direction is the direction in which the transport device 1 transports the transport object, and in the example of Fig. 1, it is the up-down direction (vertical direction). The threaded rebar 10 is supported rotatably around an axis at both upper and lower ends along the transport direction of the transport device 1. In the transport device 1 here, the threaded rebar 10 is arranged so as to extend along the main reinforcement of the reinforced concrete structure.

[0022] The lower end of the threaded rebar 10 is rotatably supported by a driving unit 20, and receives a rotating driving force. The driving unit 20 serves as the base of the conveying device 1, and is a part that generates the driving force for conveying. The driving unit 20 has a driving source 21, a transmission unit 22, and a housing 23.

[0023] The driving source 21 is a component that generates a driving force for conveyance, and may be, for example, a motor. The motor may be directly attached to the driving unit 20 as a part of the conveyance device 1, or may be in a form in which the rotation of an external motor is input to the driving unit 20. For example, a commercially available rechargeable electric drill or electric impact driver may be used as the external motor. The motor may be one that uses an external power source.

[0024] The transmission unit 22 is a part that transmits the driving force of the driving source 21 to the threaded rebar 10. The transmission unit 22 includes, for example, a gear box 22a, an output shaft 22b, a coupling 22c, a vertical shaft 22d, a rebar connection part 22e, an angular bearing 22f, and a thrust bearing 22g.

[0025] The gear box 22a receives the driving force of the driving source 21 and changes the direction of rotation of the driving source 21 to rotate around the axis of the threaded rebar 10. In FIG. 1, for example, the rotation of an external motor is input to the driving unit 20 in the horizontal direction and is changed to rotate around the axis in the vertical direction. The gear box 22a may slow down or speed up the rotation of the driving source 21. A gear box with a known configuration can be used as the gear box 22a. The gear box 22a outputs the driving force with the changed direction of rotation to the output shaft 22b of the gear box 22a, which is coaxial with the axis of the threaded rebar 10.

[0026] The coupling 22c is a power transmission member that connects the output shaft 22b and the vertical shaft 22d. As the coupling 22c, a known type (e.g., a flex coupling) can be used. The vertical shaft 22d is an intermediate shaft between the output shaft 22b and the threaded reinforcing bar 10 to facilitate connection with the threaded reinforcing bar 10. The vertical shaft 22d is, for example, a reinforcing bar that is the same as the threaded reinforcing bar 10, and is machined as a lower end so that it can be connected with the coupling 22c. The other end of the vertical shaft 22d is disposed as an upper end without being machined, and is connected to the threaded reinforcing bar 10 using the reinforcing bar connection part 22e.

[0027] The reinforcing bar connection part 22e is not particularly limited, but a reinforcing bar nut that can be screwed onto the threaded reinforcing bar 10 can be used. The reinforcing bar nut may be the same type as that of the retractable member 60 described below. Although a reinforcing bar nut is less expensive as the reinforcing bar connection part 22e, a known coupling may also be used.

[0028] The other end of the vertical shaft 22d is inserted below the reinforcing bar connection part 22e. The inserted vertical shaft 22d is fastened and fixed by a pair of screws inserted into the screw holes on the side surface of the reinforcing bar connection part 22e. The lower end of the above-mentioned threaded reinforcing bar 10 is inserted above the reinforcing bar connection part 22e. The inserted threaded reinforcing bar 10 is fastened and fixed by a pair of screws inserted into the screw holes on the side surface of the reinforcing bar connection part 22e.

[0029] The angular bearing 22f is a bearing for supporting the threaded reinforcing bar 10 so that it can rotate around its axis while positioning the threaded reinforcing bar 10 in the radial direction. A radial bearing may be used instead of the angular bearing 22f. The thrust bearing 22g supports the vertical load in the axial direction of the threaded reinforcing bar 10. A vertical load corresponding to the weight of the reinforcing bar 2 supported by the support portion 72 is transmitted to the threaded reinforcing bar 10. Therefore, the thrust bearing 22g is designed to take this vertical load into consideration. A C-ring that can be tightened with a bolt may be provided below the angular bearing 22f to prevent the vertical shaft 22d from coming off upward (not shown).

[0030] The housing 23 is a member that supports the vertical load in the axial direction from the threaded reinforcing bar 10 and also serves as a housing for the drive unit 20. The housing 23 has, for example, a lower housing 24 and an upper housing 25. The dimensions and shape of each part of the housing 23 are determined so that deformation, etc. does not occur due to the vertical load in the axial direction from the threaded reinforcing bar 10.

[0031] The lower housing 24 is a gear house that houses the gear box 22a and the output shaft 22b. The lower housing 24 is a part that is the main foundation of the entire conveying device 1. The lower housing 24 is, for example, a box-shaped body formed of two or more side walls and a top plate and a bottom plate arranged above and below the side walls to define an accommodation space inside. The side walls of the lower housing 24 may be arranged, for example, to face each other, and the accommodation space sandwiched between the pair of side walls may be open in the lateral direction. The lower housing 24 may be formed by welding iron plates together. The lower surface 24a, which is the bottom plate of the lower housing 24, is a flat placement surface having a certain area in consideration of stability when the conveying device 1 is installed and used for transportation, and is placed on a concrete surface 4 in which a plurality of main reinforcements 3 extending in the vertical direction are embedded.

[0032] The upper housing 25 is a gear house that houses or supports the coupling 22c, the vertical shaft 22d, the angular bearing 22f, and the thrust bearing 22g. The upper housing 25 rotatably supports the lower end side of the threaded reinforcing bar 10. The upper housing 25 is, for example, a box-shaped body formed of two or more side walls smaller than those of the lower housing 24 and a top plate and a bottom plate arranged above and below the side walls to define an accommodation space inside. The side walls of the upper housing 25 may be arranged to face each other in a position parallel to the side walls of the lower housing 24, for example, and the accommodation space sandwiched between the pair of side walls may be opened in the lateral direction. The upper housing 25 has an upper bottom portion 25a, which is an upper top plate, and a through hole (not shown) through which the vertical shaft 22d is inserted is formed. A recess into which the thrust bearing 22g is fitted is formed around the through hole on the upper surface of the upper bottom portion 25a. A recess into which the angular bearing 22f is fitted is formed around the through hole on the lower surface of the upper bottom portion 25a. The lower end of the upper housing 25 is fixed to the upper surface 24b of the lower housing 24 so as to also serve as the bottom plate of the upper housing 25. A flange (not shown) extending from the side wall and bolted to the top plate of the lower housing 24 may be provided at the lower end of the upper housing 25 for fixing to the lower housing 24. The lower end of the threaded reinforcing bar 10 is rotatably supported by the driving unit 20 as described above.

[0033] The long members 12 are arranged in parallel with the threaded reinforcing bars 10, and serve to guide the spacer members 70 that support the reinforcing bars 2. The long members 12 extend linearly in the vertical direction (transport direction). The long members 12 may be, for example, rods, square bars, or pipes, and are round steel materials in this example. The long members 12 may have a thickness that takes into consideration the load applied by the spacer members 70 according to the dimensions and number of the reinforcing bars 2. The length of the long members 12 corresponds to the position of the reinforcing bars 2. In the example of FIG. 1, the long members 12 have a height that is approximately the same as that of the threaded reinforcing bars 10.

[0034] The upper end of the threaded reinforcing bar 10 and the upper end of the long member 12 are connected by the upper fixing part 40. The upper fixing part 40 is a structure for fixing the upper end of the long member 12 to the upper end of the threaded reinforcing bar 10. FIG. 2(a) is a plan view illustrating the structure of the upper fixing part. As shown in FIG. 1 and FIG. 2(a), on the threaded reinforcing bar 10 side of the upper fixing part 40, the threaded reinforcing bar 10 is inserted into a flanged cylindrical member 41, and the flanged cylindrical member 41 is inserted into the rotation support part 42 of the upper fixing part 40 through a predetermined clearance D, so that the threaded reinforcing bar 10 is rotatably supported. The rotation support part 42 is a cylindrical polished steel material, and the axial dimension is shorter than the tube part of the flanged cylindrical member 41. The upper and lower ends of the flanged cylindrical member 41 are fixed so as to be sandwiched between a pair of lock nuts 43. The pair of lock nuts 43 may each have fixing bolts screwed into three of the six faces from the side. Therefore, inside the rotation support part 42, the pair of lock nuts 43 and the flanged cylindrical member 41 rotate integrally with the threaded rebar 10. By adopting a gripping structure with a clearance for the threaded rebar 10, rotation failure due to eccentricity of the threaded rebar 10 is suppressed. The predetermined clearance D is not particularly limited, but may be 5 to 10 mm (e.g., 7.5 mm). In addition, when the amount of eccentricity of the threaded rebar 10 is large and a larger clearance D is required, for example, the flanged cylindrical member 41 and the pair of lock nuts 43 may be omitted, and a structure in which the rotation support part 42 surrounds the threaded rebar 10 may be adopted.

[0035] On the side of the elongated member 12 of the upper fixing part 40, a pair of plate-like members 44 are arranged to sandwich the elongated member 12. The pair of plate-like members 44 extend parallel to each other with the rotation support part 42 as a base end, and a reinforcing plate 45 is provided at the joint with the rotation support part 42. The reinforcing plate 45 has a flat plate portion cut out in an arc shape along the outer shape of the rotation support part 42, and is fixed by, for example, welding in a direction perpendicular to the axial direction of the rotation support part 42. The lower sides of the pair of plate-like members 44 are placed on the upper surface of the flat plate portion of the reinforcing plate 45 and fixed by, for example, welding.

[0036] As shown in FIG. 2(a), when the threaded reinforcing bar 10 is inserted through the rotation support part 42, the pair of plate-like members 44 are in a positional relationship in which they sandwich the long member 12 and are sandwiched between the pair of main reinforcements 3. A flat plate 44a protruding in the tangential direction of the pair of main reinforcements 3 is provided at the center of the pair of plate-like members 44. The flat plate 44a is, for example, a steel plate, and is fixed to each of the pair of plate-like members 44 by, for example, welding. The upper fixing part 40 is fixed to the main reinforcements 3 by fixing each of the pair of main reinforcements 3 and the flat plate 44a with, for example, a U-bolt, thereby suppressing the displacement along the horizontal plane. The main reinforcements 3 are indicated by dashed lines in FIG. 1. In the state of FIG. 2(a), the spacer member 70 inserted through the long member 12 can be lowered to pass between the pair of plate-like members 44 in order to connect the spacer member 70 described later to the advancing and retreating member 60 below the upper fixing part 40.

[0037] FIG. 2(b) is a plan view showing an example of fixing the long member by the upper fixing part. In FIG. 2(b), the pair of main reinforcements 3 and the flat plate 44a shown in FIG. 2(a) are omitted. When the spacer member 70 is lowered to pass between the pair of plate-like members 44 in the state shown in FIG. 2(a) and then transported using the spacer member 70, the long member 12 is fixed to the screw-knotted reinforcing bar 10 by attaching the fixing plate 46 and the pressing member 47 as shown in FIG. 2(b). The fixing plate 46 is a substantially rectangular member that is spanned across the upper side surfaces of the pair of plate-like members 44. One end side of the fixing plate 46 has a pair of protrusions 46a that suppress lateral displacement of the long member 12. At the tip side of the pair of plate-like members 44, the pressing member 47 is spanned across the pair of grooves 44b and faces the one end side of the fixing plate 46 across the long member 12. The center of the pressing member 47 is formed as a recessed portion 47a to suppress lateral displacement of the elongated member 12, and a bolt 48 can be screwed in to press the elongated member 12. When the elongated member 12 is pressed by the bolt 48, the other end side of the fixing plate 46 comes into contact with the outer circumferential surface of the rotation support part 42. As a result, the elongated member 12 is sandwiched and fixed between the fixing plate 46 and the pressing member 47.

[0038] The lower end of the threaded reinforcing bar 10 and the lower end of the long member 12 are connected by the lower fixing part 50. The lower fixing part 50 is a structure for fixing the lower end of the long member 12 to the lower end of the threaded reinforcing bar 10. FIG. 3 is a plan view illustrating the structure of the lower fixing part. As shown in FIG. 1 and FIG. 3, the lower fixing part 50 has a fixing metal fitting 51, a lowest spacer member 52, and a separate collar 53. The fixing metal fitting 51 and the separate collar 53 are members for gripping the long member 12 via the lowest spacer member 52. The fixing metal fitting 51 is a metal fitting for fixing the separate collar 53. The fixing metal fitting 51 may be, for example, a steel having a U-shaped cross section with a width sufficient to fix the separate collar 53 with, for example, two bolts. The fixing metal fitting 51 is fixed to the side of the lower housing 24 by, for example, welding. The separate collar 53 is a known split collar member that is integrated by, for example, fastening a screw and can be separated by removing the screw.

[0039] The lowest spacer member 52 is a cylindrical member that is inserted into the long member 12 and is located at the lower end of the long member 12. The lower end of the lowest spacer member 52 is placed on the concrete surface 4 on which the lower housing 24 of the drive unit 20 is placed. The lowest spacer member 52 has a length dimension according to the mounting height of the reinforcing bars 2, and serves as a reference for the height position of the spacer member 70. That is, the lower end of the spacer member 70 abuts against the upper end of the lowest spacer member 52, thereby determining the height position of the spacer member 70, and thus serving as a height reference for the mounting height of the reinforcing bars 2. The lowest spacer member 52 is held by, for example, a separable separate collar 53 and fixed to the fixing bracket 51.

[0040] The lowest spacer member 52 is sandwiched between a pair of main reinforcements 3 and fixed by a flat plate 54 extending across the pair of main reinforcements 3. The flat plate 54 is, for example, an iron plate, and is fixed, for example, by welding, so as to be in contact with the outer circumferential surface of the lowest spacer member 52. By fixing each of the pair of main reinforcements 3 to the flat plate 54 with, for example, a U-bolt, the lowest spacer member 52 is indirectly fixed to the main reinforcements 3, and displacement along the horizontal plane is suppressed. Note that the main reinforcements 3 are indicated by dashed lines in FIG. 1, and the flat plate 54 is fixed to a position different from the separate collar 53 in the axial direction of the lowest spacer member 52.

[0041] Returning to FIG. 1, the moving member 60 is a member that moves forward and backward along the axial direction of the threaded reinforcing bar 10 in response to the driving force of the driving source 21. The moving member 60 cooperates with the threaded reinforcing bar 10 to convert the driving force of the driving source 21 into the conveying force of the conveying device 1. In other words, the driving source 21 moves the moving member 60 forward and backward relative to the threaded reinforcing bar 10. The inner peripheral surface 60a of the moving member 60 is screwed into the thread of the threaded reinforcing bar 10. The moving member 60 is a reinforcing bar nut, and for example, a so-called joint coupler can be used. The dimensions of the moving member 60 are not particularly limited, but are set to a length that can be screwed into the threaded reinforcing bar 10 and can ensure the mounting strength of the hanging shackle 61 described below, taking into consideration the load acting according to the dimensions and number of the reinforcing bars 2 to be conveyed. The moving member 60 may be a so-called epoxy grout joint. In this case, epoxy resin is not filled.

[0042] A hoisting shackle 61 is attached to the advancing / retreating member 60 to connect the advancing / retreating member 60 and the spacer member 70. FIG. 4 is a plan view showing the relationship between the connecting member and the moving part. FIG. 5 is a side view showing an example of the operation of the connecting member. As shown in FIG. 1, FIG. 4, and FIG. 5, the hoisting shackle 61 is, for example, U-shaped and has bolt holes at both ends. The hoisting shackle 61 is attached to the advancing / retreating member 60, for example, by welding a pair of nuts to the side of the advancing / retreating member 60 and screwing a bolt inserted into the bolt hole into the nut. The bolt inserted into the bolt hole is rotatable relative to the bolt hole. Therefore, the hoisting shackle 61 is swingable relative to the advancing / retreating member 60. The hoisting shackle 61 connects the advancing / retreating member 60 and the spacer member 70 by engaging with a hook 74 of the spacer member 70 described later.

[0043] The spacer member 70 is a member that moves along the long member 12 while being connected to the advance / retract member 60, and transports the reinforcing bars 2. The spacer member 70 has a tubular member 71 that is inserted into the long member 12, and is provided so as to be movable along the long member 12. The inner diameter of the tubular member 71 may be slightly (for example, 1 mm to 2 mm) larger than the outer diameter of the long member 12. The spacer member 70 is movable without significant inclination relative to the long member 12 while being inserted into the long member 12. The length of the tubular member 71 (the height of one spacer member 70) is set to the same dimension as the reinforcing bar pitch of a given reinforcing bar 2. The reinforcing bar pitch of the reinforcing bars 2 is the design value of the interval between adjacent reinforcing bars 2 in the extension direction of the main bars 3. By appropriately changing the diameter and length of the spacer member 70 and the long member 12, the spacer member 70 can be applied to the arrangement of reinforcing bars 2 with any diameter and reinforcing bar pitch.

[0044] The spacer member 70 is provided with a support portion 72 that supports the reinforcing bars 2. The support portion 72 is fixed to a predetermined position in the longitudinal direction of the tubular member 71. In a plurality of spacer members 70, the positions at which the support portions 72 are fixed to the tubular member 71 may be the same. The support portion 72 illustrated in Figs. 1, 4 and 5 is configured to support one reinforcing bar 2 per one spacer member 70.

[0045] The support portion 72 can be configured using, for example, an L-shaped angle bar. One side 72a of the L-shaped angle bar is fixed to the tubular member 71 of the spacer member 70 so as to extend along a direction perpendicular to the long member 12. One side 72a of the L-shaped angle bar is fixed to the tubular member 71 of the spacer member 70 so that a tip end of the other side 72b of the L-shaped angle bar faces upward along the extension direction of the long member 12. One side 72a of the L-shaped angle bar is cut out in an arc shape along the outer shape of the tubular member 71, for example, and is butted against and welded to a lower end portion 71a of the tubular member 71.

[0046] The distribution bars 2 are placed on the upper surface of one side 72a of the L-shaped angle bar, so that the distribution bars 2 are supported by the spacer member 70. The other side 72b of the L-shaped angle bar functions as a wall section that prevents the distribution bars 2 from falling. The other side 72b of the L-shaped angle bar may be provided with a protrusion 73 to prevent the distribution bars 2 from jumping out. The protrusion 73 may be, for example, a bolt screwed into a screw hole drilled in the other side 72b of the L-shaped angle bar. The positions of the long member 12 and the spacer member 70 are configured so that the distribution bars 2 placed on the upper surface of one side 72a of the L-shaped angle bar can be positioned in contact with a pair of main reinforcements 3, as shown in FIG. 4.

[0047] The spacer member 70 has a hook (engagement portion) 74 on its side surface that engages with the hanging shackle 61. The hook 74 is provided on an upper end portion 71b of the tubular member 71, for example, on the side surface of the tubular member 71 opposite the support portion 72. When the support portion 72 is positioned on the opposite side to the advancing / retracting member 60, for example, the hook 74 faces the advancing / retracting member 60.

[0048] The hook 74 is, for example, a flat plate formed into a hook shape (L-shape) in a side view. The flat plate is, for example, an iron plate, and is fixed to the tubular member 71 by, for example, welding. The flat plate has, for example, a horizontal portion 74a extending from an upper end portion 71b of the tubular member 71 along a direction perpendicular to the axial direction of the tubular member 71, and a vertical portion 74b extending downward from the tip of the horizontal portion 74a. A space 75 surrounded by the horizontal portion 74a, the vertical portion 74b, and the side surface of the tubular member 71 has a size capable of receiving the shackle 61 and opens downward. The lower end portion of the vertical portion 74b may be obliquely cut out so as to guide the shackle 61 into the space 75. The fixing positions of the support portion 72 and the hook 74 in the spacer member 70 are not limited to the above example.

[0049] When the hook 74 is engaged with the hoisting shackle 61, the moving member 60 is connected to the spacer member 70. The spacer member 70, which is tethered to the moving member 60, moves while supporting the reinforcing bars 2 with the support parts 72, thereby transporting the reinforcing bars 2. By connecting the moving member 60 to the spacer member 70, the moving member 60 is prevented from rotating together with the threaded reinforcing bars 10. In the example of FIG. 4, the moving member 60 may have a co-rotation prevention member 62 fixed to it by welding, for example. The co-rotation prevention member 62 has a length that extends to the side of the spacer member 70, and when the hook 74 is not engaged with the hoisting shackle 61 (when the moving member 60 is raised, which will be described later), the moving member 60 is prevented from rotating together with the threaded reinforcing bars 10 by the co-rotation prevention member 62 abutting against the side of the spacer member 70.

[0050] The conveying device 1 may include a control unit 80 that controls the driving sources 21 of the multiple conveying devices 1 to synchronize with each other (see FIG. 6(a)). When multiple conveying devices 1 are used to convey one reinforcement bar 2, the control unit 80 controls the driving sources 21 of the respective conveying devices 1 to synchronize with each other based on the rotation speed of the driving source 21 or the threaded rebar 10. The conveying device 1 may include a tachometer (not shown) that detects the rotation speed of the driving source 21 or the threaded rebar 10. The control unit 80 may be configured as a general computer equipped with, for example, a processor, a storage unit, a communication unit, and a user interface. The control unit 80 is connected to the multiple conveying devices 1 arranged, for example, wirelessly or by wire via the communication unit so as to be able to communicate with each other, and controls the rotation speeds of the motors to be synchronized with each other.

[0051] Note that multiple conveying devices 1 may be used in mechanical synchronization. For example, the multiple conveying devices 1 may be configured to be able to be fitted with a connecting shaft 26 that transmits driving force to other conveying devices 1 (see FIG. 6(b)). The gear boxes 22a of adjacent conveying devices 1 may be connected to each other by the connecting shaft 26. In this case, the rotation of the external motor is input to the drive unit 20 and transmitted to the other conveying devices 1 as rotation about the axis of the connecting shaft 26 extending horizontally.

[0052] [Rebar transportation method] A reinforcing bar conveying method for conveying reinforcing bars 2 intersecting multiple main bars 3 extending in the vertical direction in the arrangement of reinforced concrete structures using the conveying device 1 configured as above will be described. Fig. 6(a) is a schematic plan view showing a first arrangement example of multiple conveying devices. Fig. 6(b) is a schematic plan view showing a second arrangement example of multiple conveying devices. Fig. 6(c) is a schematic plan view showing a third arrangement example of multiple conveying devices. Fig. 7 is a flow chart showing an example of a reinforcing bar conveying method.

[0053] 6(a) to 6(c), small white circles indicate the positions of the main reinforcements 3, large black circles indicate the conveying devices 1 to which driving force is input from the driving source 21, and large white circles indicate the conveying devices 1 that are subordinate to the conveying devices 1 of the large black circles in synchronization with each other via the connecting shafts 26. In this manner, all of the multiple conveying devices 1 may be equipped with independent driving sources 21, and the respective driving sources 21 may be synchronously controlled by the control unit 80, or the conveying devices 1 may be subordinate to each other via the connecting shafts 26. In the case of the subordinate conveying devices 1, the input of driving force from the connecting shafts 26 may be regarded as the driving source 21.

[0054] First, multiple transport devices 1 are installed in the arrangement range of the distribution bars 2 with the threaded rebars 10 extending along the main bars 3 (S01: installation step). The arrangement range of the distribution bars 2 means the extension range of the distribution bars 2 in which one distribution bar 2 connected to multiple main bars 3 extends, and corresponds to the range of the line indicated by the symbol 2 in Figures 6(a) to 6(c).

[0055] The arrangement range of the distribution reinforcement 2 may be, for example, a linear arrangement range as shown in FIG. 6(a). The arrangement range of the distribution reinforcement 2 may be a curved arrangement range in which the distribution reinforcement 2 is partially bent along the shape of the skeleton of the reinforced concrete structure as shown in FIG. 6(b). The arrangement range of the distribution reinforcement 2 may be a pair of linear arrangement ranges corresponding to each of the pair of linearly arranged main reinforcement 3 when the pair of linearly arranged main reinforcement 3 are connected by a width stopper 5 as shown in FIG. 6(c). The distribution reinforcement 2 is transported in the vertical direction (for example, from above to below) while existing in the arrangement range of the distribution reinforcement 2 in a planar view, for example, along a horizontal plane.

[0056] Conventionally, as a method for reducing the labor required for assembling distribution bars, there is a method (Nopp Carry method) in which several levels are prefabricated in a temporary yard near the planned construction site of the skeleton of a reinforced concrete structure and erected all at once. However, this requires a temporary yard with the same area as the skeleton, making it difficult to adopt in narrow places. However, with the conveying device 1, the area it occupies in a plan view is significantly reduced, making it easy to arrange multiple units on a flat surface, and it can also accommodate the arrangement of distribution bars for skeletons with complex side shapes. Also, since the width stop bars 5 can be installed in advance and then the distribution bars 2 can be arranged, the installation work of the width stop bars 5 is easier than if they were installed after the arrangement of the distribution bars 2.

[0057] 1 and 5, in each of the multiple transport devices 1, the support parts 72 support the reinforcing bars 2 as the transport target (S02: supporting step). For example, in each of the multiple transport devices 1, the reinforcing bars 2 are placed on the upper surface of one side 72a of the L-shaped angle material of the support parts 72 on the upper part of the scaffolding erected around the skeleton of the reinforced concrete structure, thereby placing the reinforcing bars 2 on the support parts 72 of the spacer member 70.

[0058] Next, in each of the multiple conveying devices, the driving source 21 moves the advancing / retreating member 60 forward and backward relative to the threaded rebar 10, and the spacer member 70 connected to the advancing / retreating member 60 moves along the long member 12 (S03: moving step). For example, the driving sources 21 of the multiple conveying devices 1 are synchronously controlled, or the multiple conveying devices 1 are mechanically synchronized, so that the advancing / retreating members 60 of the multiple conveying devices 1 advance downward as a whole. In the conveying device 1, the driving source 21 rotates the threaded rebar 10, thereby advancing the advancing / retreating member 60 having a nut structure from above to below.

[0059] As shown in Fig. 5, when the spacer member 70 is lowered from above the long member 12, the hook 74 is engaged with the hoisting shackle 61, and the weight of the spacer member 70 and the weight of the reinforcing bars 2 act on the hoisting shackle 61. In this state, the spacer member 70 moves downward along the long member 12 while maintaining a state of being suspended from the advancing / retreating member 60 via the hoisting shackle 61 when the advancing / retreating member 60 advances downward. In other words, the hoisting shackle 61 maintains its connection with the spacer member 70 by the weight of the spacer member 70 acting on the spacer member 70 while engaged with the hook 74. In this way, the spacer member 70 moves along the long member 12 while connected to the advancing / retreating member 60, and transports the reinforcing bars 2.

[0060] Note that a plurality of spacer members 70 may be moved all at once along the elongated member 12 by placing another spacer member 70 on the spacer member 70 suspended from the advancing / retreating member 60 via the hoisting shackle 61. In this case, the hook 74 of the other spacer member 70 placed on the suspended spacer member 70 is not essential.

[0061] In the moving step, after the lowered reinforcing bars 2 are placed in each of the multiple transport devices, the advancing / retreating member 60, which has been released from the connection with the spacer member 70, may be moved so as to retreat along the long member 12. For example, after the spacer member 70 hits and stops against a spacer member 70 present below or the lowest spacer member 52, the advancing / retreating member 60 is further lowered so that only the hoisting shackle 61 descends relative to the hook 74, and the engagement between the hoisting shackle 61 and the hook 74 is released. In other words, the hoisting shackle 61 is released from the connection with the spacer member 70 when the weight of the spacer member 70 no longer acts while engaged with the hook 74.

[0062] The shackle 61 that has been released from the hook 74 swings away from the hook 74 as shown by the two-dot chain line in Fig. 5, and therefore does not re-engage with the hook 74 even if the advancing / retreating member 60 rises. Therefore, the advancing / retreating member 60 can be separated from the spacer member 70 and retreat upwards on its own. After that, the next spacer member 70 is attached to the advancing / retreating member 60 again at the top of the scaffolding, and the reinforcing bars 2 are supported by the support parts 72, allowing the advancing / retreating member 60 to be lowered.

[0063] In the moving step, the plurality of spacer members 70 may be moved sequentially along the long member 12 in each of the plurality of conveying devices, and the plurality of spacer members 70 may be stacked to erect the reinforcing bars 2 in a plurality of stages. For example, as shown in FIG. 1, when the plurality of spacer members 70 are inserted sequentially into the long member 12, the first spacer member 70 moves downward along the long member 12 and stops by hitting the lowest spacer member 52 that is already present below. The second and subsequent spacer members 70 move downward along the long member 12 and hit the spacer members 70 that are already present below and stop. Here, the height of the spacer member 70 (the length of the tubular member 71) is the same dimension as the reinforcing bar pitch of the predetermined reinforcing bars 2. In the plurality of spacer members 70, the positions at which the support parts 72 are fixed to the tubular member 71 are the same as each other. After the spacer member 70 hits a spacer member 70 below or the lowest spacer member 52 and stops, the spacer member 70 functions as a stand that holds the reinforcing bars 2. Therefore, by stacking a plurality of spacer members 70 on top of each other, the intervals between the reinforcing bars 2 supported by each support portion 72 match the reinforcing bar pitch of the predetermined reinforcing bars 2, and the reinforcing bars 2 are erected in a plurality of stages.

[0064] In addition, while the spacer members 70 function as a frame for holding the reinforcing bars 2, the reinforcing bars 2 are tied to the main reinforcing bars 3 using, for example, wires. After the reinforcing bars 2 are tied to the main reinforcing bars 3, the spacer members 70 that functioned as frames may be buried in concrete together with the main reinforcing bars 3 and the reinforcing bars 2, or may be dismantled and reused. When dismantling and reusing, first, the separate collar 53 of the lower fixing part 50 is divided, and the cylindrical member of the lowest spacer member 52 is divided, so that the lowest spacer member 52 is removed from the long member 12. By removing the protrusion 73 on the other side 72b of the L-shaped angle material, interference between the protrusion 73 and the reinforcing bars 2 is eliminated, and the spacer members 70 are further moved downward by the height of the lowest spacer member 52. In this case, the tip of the other side 72b of the L-shaped angle iron of each spacer member 70 will be below the reinforcing bar 2, so that the entire conveying device 1 can be moved in a direction away from the reinforcing bar 2 (to the left on the page in the example of Figure 1) and removed, making it possible to dismantle and reuse multiple spacer members 70.

[0065] According to the conveying device (reinforcing bar conveying device) 1 and the reinforcing bar conveying method described above, when the driving source 21 rotates the screw-knotted reinforcing bar 10, the advancing and retreating member 60 advances and retreats along the screw-knotted reinforcing bar 10. Since the advancing and retreating member 60 and the spacer member 70 are connected by the hanging shackle 61, when the advancing and retreating member 60 advances and retreats along the screw-knotted reinforcing bar 10, the spacer member 70 moves along the long member 12. Therefore, the reinforcing bar 2, which is the object to be conveyed and supported by the support part 72, is conveyed according to the advance and retreat of the advancing and retreating member 60 or the movement of the spacer member 70. In addition, multiple conveying devices 1 are installed in the arrangement range of the reinforcing bar 2 with the screw-knotted reinforcing bar 10 extending along the main reinforcement 3. In each of the multiple conveying devices 1, the reinforcing bar 2 is supported by the support part 72. Therefore, according to the movement of the spacer member 70, the reinforcing bar 2 can be conveyed in the vertical direction while being supported so as to be along a direction intersecting the multiple main reinforcement bars 3 extending in the vertical direction. As described above, by using the threaded reinforcing bar 10 and rod material or the like as the long member 12, the structure can be constructed at low cost and is less susceptible to the effects of dust, etc. Therefore, compared to the case where a linear guide or the like is used, the structure has less durability problems at civil engineering and construction sites, etc., and is low-cost and suitable for the usage environment of on-site work.

[0066] In the transport device 1, the spacer member 70 is a tubular member 71 having a hook 74 on its side that engages with the hanging shackle 61, and the hanging shackle 61 maintains the connection with the spacer member 70 by the weight of the spacer member 70 acting on the spacer member 70 when engaged with the hook 74, and releases the connection with the spacer member 70 by the weight of the spacer member 70 no longer acting on the spacer member 70 when engaged with the hook 74. As a result, for example, when the advancing and retracting member 60 is advanced to transport the reinforcing bars 2 to a predetermined position, the weight of the spacer member 70 acting on the reinforcing bars 2 is no longer acting on the reinforcing bars 61, and the connection between the advancing and retracting member 60 and the spacer member 70 is automatically released. Therefore, the advancing and retracting member 60 can be retracted, leaving the spacer member 70 in a state of supporting the reinforcing bars 2.

[0067] The conveying device 1 includes a control unit 80 that controls the driving sources 21 of the multiple conveying devices 1 to synchronize with each other. This allows the reinforcement bars 2 to move in parallel in the vertical direction while maintaining the extension direction of the reinforcement bars 2.

[0068] Furthermore, the conveying device (rebar conveying device) 1 and the rebar conveying method make it easier to mechanize the arduous task of manually handling heavy objects, such as large reinforcement bars 2 used in large-scale reinforced concrete structures.

[0069] In addition, since the distribution bars 2 are automatically arranged at a pitch of the length (height) of the spacer members 70, by stacking multiple spacer members 70 in sequence, the distribution bars 2 can be easily and accurately arranged at a predetermined pitch, eliminating the need for, for example, manually marking the placement positions of the distribution bars 2 on the main reinforcement bars 3.

[0070] Furthermore, the setting (placing) of the distribution bars 2 on the support parts 72 of the spacer members 70 and the lowering of the spacer members 70 can be performed by repeated work at the top of the scaffolding. This eliminates the need for workers assembling the main reinforcements 3 and the distribution bars 2 to move widely, up, down, left and right, on the scaffolding and overhanging bracket scaffolding surrounding the reinforced concrete structure, improving safety by reducing work at height. Furthermore, it also eliminates the need for a crane to hoist the distribution bars 2 with a sling wire into the narrow gap between the scaffolding and the reinforced concrete structure, improving safety. For example, when an internal combustion engine crane truck is used, fuel consumption can be reduced, which is expected to reduce CO2 emissions.

[0071] In addition, since the spacer members 70 function as a stand to hold the reinforcing bars 2, it is no longer necessary to separately prepare a shelf-like steel stand for assembling reinforcing bars as has been conventionally used. This makes it possible to significantly reduce the labor and steel materials required for assembling the steel stand for assembling reinforcing bars.

[0072] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be embodied in various forms.

[0073] In the first embodiment, an example in which the conveying device 1 is configured as a reinforcing bar conveying device has been described, but the present invention is not limited to this example. For example, as shown in Figs. 8 to 11, the conveying devices 1A to 1E may be configured to convey items other than reinforcing bars. In the second to sixth embodiments in Figs. 8 to 11, configurations that are mainly different from the first embodiment will be described. In Figs. 9 and 10, the configurations corresponding to the upper fixing part 40 and the lower fixing part 50 are fixing parts 40B, 40C, and 40D and fixing parts 50B, 50C, and 50D, but these are illustrated in correspondence to the driving part 20 in terms of their relative positional relationship, not in terms of their vertical positional relationship.

[0074] FIG. 8 is a side view illustrating a conveying device according to the second embodiment. As shown in FIG. 8, in the conveying device 1A according to the second embodiment, a connecting member 61A may be attached to the side of the advancing and retreating member 60A. The connecting member 61A may be connected to a cylindrical moving part 70A. The screw-knotted reinforcing bar 10A and the long member 12A are fixed by the upper fixing part 40A and the lower fixing part 50A so that the conveying direction is a direction along the up-down direction. The lower fixing part 50A is fixed to, for example, a concrete surface 4. When the screw-knotted reinforcing bar 10A is rotated by the driving part 20A, the moving part 70A is moved by the connecting member 61A according to the advancing and retreating movement of the advancing and retreating member 60A, and moves along the long member 12A. The moving part 70A may be provided with, for example, a load basket as a support part 72A that supports the conveyed object.

[0075] FIG. 9(a) is a side view illustrating a conveying device according to the third embodiment. As shown in FIG. 9(a), in the conveying device 1B, the screw-knotted reinforcing bar 10B and the long member 12B may be fixed to the ceiling by the fixing part 40B and the fixing part 50B so that the conveying direction is along the horizontal direction. A connecting member 61B may be attached to the side of the advancing and retreating member 60B. In the conveying device 1B, the connecting member 61B may be connected to a cylindrical moving part 70B. In the example of FIG. 9(a), a hanging shackle and a cargo basket are provided as a support part 72B for supporting the conveyed object on the connecting member 61B on the advancing and retreating member 60B side, instead of the moving part 70B. In this case, the moving part 70B, unlike the moving part 70A, functions solely to prevent the advancing and retreating member 60B from rotating together with the screw-knotted reinforcing bar 10B. When the screw-knotted reinforcing bar 10B is rotated by the driving unit 20B, the support unit 72B that supports the transport object moves along the screw-knotted reinforcing bar 10B and the long member 12B in accordance with the advancing and retreating motion of the advancing and retreating member 60B. FIG. 9(b) is a side view illustrating a transport device according to a fourth embodiment. In the transport device 1C in FIG. 9(b), the screw-knotted reinforcing bar 10C and the long member 12C may be fixed to the ceiling by the fixing unit 40C and the fixing unit 50C so that the transport direction is along the horizontal direction. In the transport device 1C, unlike the example in FIG. 9(a), a pan head may be provided, for example, on the moving unit 70C as the support unit 72C that supports a camera as the transport object, instead of the advancing and retreating member 60C. When the screw-knotted reinforcing bar 10C is rotated by the driving unit 20C, the moving unit 70C is moved by the connecting member 61C in accordance with the advancing and retreating motion of the advancing and retreating member 60C, and moves along the long member 12C. In other words, the support portion for supporting the object to be transported may be provided on either the advancing / retreating member or the moving portion. The object to be transported is not limited to a baggage basket or a camera, but may be a light or any other object.

[0076] FIG. 10(a) is a side view illustrating a conveying device according to a fifth embodiment. FIG. 10(b) is a partial cross-sectional view taken along the line bb in FIG. 10(a). As shown in FIG. 10(a) and FIG. 10(b), a screw-knotted reinforcing bar 10D and a pair of long members 12D as rails may be provided so as to extend at an incline with respect to a horizontal plane. The screw-knotted reinforcing bar 10D and the long member 12D may be fixed to an inclined surface 4D by a fixing part 40D and a fixing part 50D so that the conveying direction is a direction inclined with respect to a horizontal plane. In the conveying device 1D, a load basket is provided so as to be movable via wheels along the pair of long members 12D. This load basket may function as a support part 72D that supports the object to be conveyed and may constitute a moving part 70D that moves along the pair of long members 12D. A connecting member 61D attached to the side of the advancing and retreating member 60D may be connected to the bottom of the load basket and integrated with the moving part 70D. Even in this case, when the screw-jointed rebar 10D is rotated by the driving unit 20D, the basket as the moving unit 70D is moved by the connecting member 61D in accordance with the advancing and retreating movement of the advancing and retreating member 60D, and moves along the long member 12D. Also, the conveying device 1D is arranged so that the lower half of the device is immersed in water, and the driving unit 20D is arranged outside the water at the upper end. In this way, the object to be conveyed can be conveyed underwater, except for the vicinity of the driving unit 20D (and the control unit).

[0077] FIG. 11 is a side view illustrating a conveying device according to the sixth embodiment. As shown in FIG. 11, in the conveying device 1E, the screw-knotted rebar 10E and the long member 12E are fixed by the upper fixing part 40E and the lower fixing part 50E so that the conveying direction is along the vertical direction. The lower fixing part 50E is fixed to, for example, a concrete surface 4. In the conveying device 1E, the screw-knotted rebar 10E is fixed to the upper fixing part 40E and the lower fixing part 50E, and the advancing and retreating member 60E is configured to be rotatable with respect to the screw-knotted rebar 10E and the connecting member 61E. For example, the side surface of the central part in the axial direction of the advancing and retreating member 60E is a cylindrical surface, and the connecting member 61E may be attached around this cylindrical surface so as to be rotatable relative to the advancing and retreating member 60E. For example, the driving part 20E is fixed to the side surface of the connecting member 61E. The advancing / retreating member 60E has one end in the axial direction formed as a gear 91, which meshes with a gear 92 of the driving unit 20E. When the gear 92 of the driving unit 20E rotates the gear 91, the advancing / retreating member 60E rotates relative to the threaded rebar 10E inside the connecting member 61E and moves vertically along the threaded rebar 10E. The connecting member 61E and the moving unit 70E move vertically without rotating relative to the upper fixed unit 40E and the lower fixed unit 50E. In other words, the driving source may rotate either the threaded rebar or the advancing / retreating member. The moving unit 70E may be provided with, for example, a load basket as a support unit 72E that supports the transport object.

[0078] In the first embodiment, the driving unit 20 includes the driving source 21, the transmission unit 22, and the housing 23, and the transmission unit 22 includes the gear box 22a, the output shaft 22b, the coupling 22c, the vertical shaft 22d, the rebar connection unit 22e, the angular bearing 22f, and the thrust bearing 22g. However, the present invention is not limited to this example. As long as the driving force of the driving source 21 can be transmitted to the threaded rebar 10, any other suitable modified configuration may be adopted.

[0079] The advancing / retreating member 60 may be provided with a guide roller. The guide roller is fixed to the advancing / retreating member 60 and has a roller that rolls on the long member 12. For example, when a load is applied to the spacer member 70, it is possible to prevent the gap between the long member 12 and the advancing / retreating member 60 from narrowing, and to prevent malfunction due to abutment. The guide roller may be configured such that, for example, a guide roller with a steel pipe as its axis is rotatably held at one end of a pair of flat plates, and the other end of the pair of flat plates is fixed to the advancing / retreating member 60.

[0080] The support portion 72 illustrated in Figures 1, 4 and 5 is configured to support one distribution bar 2 per spacer member 70, but one side 72a of the L-shaped angle bar may be extended so as to support two or more distribution bars 2 per spacer member 70. [Explanation of symbols]

[0081] 1...Transportation device (reinforcing bar transport device), 1A, 1B, 1C, 1D, 1E...Transportation device, 2...Strength distribution bar (transported object), 3...Main bar, 10, 10A, 10B, 10C, 10D, 10E...Screw-knotted reinforcing bar, 11...Outer surface, 12, 12A, 12B, 12C, 12D, 12E...Long member, 20, 20A, 20B, 20C, 20D, 20E...Drive unit (drive source), 21...Drive source, 60, 60A , 60B, 60C, 60D, 60E...advance / retraction members, 60a...inner surface, 61...suspension shackle (connecting member), 61A, 61B, 61C, 61D, 61E...connecting members, 70...spacer member (moving portion), 70A, 70B, 70C, 70D, 70E...moving portion, 71...tubular member, 72, 72A, 72B, 72C, 72D, 72E...support portion, 74...hook (engagement portion), 80...control portion.

Claims

1. A threaded reinforcing bar having a thread on its outer circumferential surface; A cylindrical advancing / retreating member whose inner circumferential surface is screwed into the thread of the threaded reinforcing bar; A long member arranged in parallel along the screw reinforcing bar; A moving part that is movable along the elongated member; A connecting member provided on the advancing / retreating member and connecting the advancing / retreating member and the moving portion; A drive source that rotates either the threaded reinforcing bar or the advancing and retreating member; a support section provided on the advancing / retreating member or the moving section, for supporting an object to be transported.

2. A reinforcing bar conveying device that conveys reinforcing bars that intersect with a plurality of main bars extending in the vertical direction in the arrangement of reinforced concrete structures, A threaded reinforcing bar having a thread on its outer circumferential surface; A cylindrical advancing / retreating member whose inner circumferential surface is screwed into the thread of the threaded reinforcing bar; A long member arranged in parallel along the screw reinforcing bar; A moving part that is movable along the elongated member; A connecting member provided on the advancing / retreating member and connecting the advancing / retreating member and the moving portion; A drive source that rotates either the threaded reinforcing bar or the advancing and retreating member; A plurality of conveying devices each including a support section provided on the moving section and supporting an object to be conveyed are installed in the arrangement range of the reinforcing bars with the threaded reinforcing bars extending along the main reinforcing bars, In each of the plurality of conveying devices, The support portion supports the reinforcing bar as the object to be transported, The driving source moves the advancing / retracting member forward and backward relative to the threaded reinforcing bar, The moving part moves along the elongated member while being connected to the advancing and retreating member, and transports the reinforcement bar.

3. the moving portion is a tubular member having an engagement portion on a side surface thereof that engages with the connecting member, The connecting member is The weight of the moving part acts on the moving part while the moving part is engaged with the engaging part to maintain the connection with the moving part, The transport device according to claim 2 , wherein the connection with the moving part is released when the weight of the moving part ceases to act on the moving part while the moving part is engaged with the engaging part.

4. The transport device according to claim 2 or 3, further comprising a control unit that controls the drive sources of the plurality of transport devices so as to synchronize with each other.

5. A reinforcing bar conveying method for conveying a reinforcing bar that intersects a plurality of main bars extending in the vertical direction in the arrangement of reinforced concrete structures, A threaded reinforcing bar having a thread on its outer circumferential surface; A cylindrical advancing / retreating member whose inner circumferential surface is screwed into the thread of the threaded reinforcing bar; A long member arranged in parallel along the screw reinforcing bar; A moving part that is movable along the elongated member; A connecting member provided on the advancing / retreating member and connecting the advancing / retreating member and the moving portion; A drive source that rotates either the threaded reinforcing bar or the advancing and retreating member; a support unit provided on the moving unit and supporting the object to be transported, An installation step of installing a plurality of the transport devices in the arrangement range of the reinforcing bars with the threaded reinforcing bars extending along the main reinforcing bars; A supporting step of supporting the reinforcing bars as the object to be transported on the supporting portions of each of the plurality of transport devices; A reinforcing bar transport method comprising: a moving step in which, in each of the plurality of transporting devices, the driving source moves the advancing / retracting member forward and backward relative to the threaded reinforcing bar, and the moving part connected to the advancing / retracting member moves along the long member.

Images