Concrete supply distributor

Abstract

To provide a concrete supply distributor having a base unit that includes: a base body; and outriggers rotatably supported, in which the base thereof is rotatably supported by the base body via a rotating support shaft and the outrigger is rotatable between the storage position near the base body and the extension position that extends outward from the storage position, in which the outrigger is enabled to be securely fixed to the unfolding position with respect to the base body, the base unit, so that the support of the distributor are stabilized.SOLUTION: Each of an outrigger 16 and a base body 10m is formed with pin insertion holes 16h1-16h3,10h1,10h2 for allowing the coupling pins P1 and P2 capable of fixing the outrigger 16 to the base body 10m of the base unit 10t, to be removably inserted for fixing the outrigger at least when the outrigger 16 is at an extension position 16A.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a distributor for supplying concrete, comprising a base device, a mast device supported in an upright position on the base device, and a boom device mounted on the mast device. [Background technology]

[0002] In the above-mentioned concrete supply distributor, the base of the outrigger is journaled on a frame that forms the main part of the base device, and the outrigger is capable of rotating around the journaled part between a stored position close to the frame and a deployed position extending outward from there. This is known from the prior art, as disclosed in Patent Document 1, for example. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 61-49849 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the distributor as shown in Patent Document 1, no position fixing means is provided for fixing the outriggers (support legs 10B) to the storage position and the deployment position relative to the frame (base 10A) which is the main part of the base. Therefore, the outriggers cannot be reliably fixed to the frame at the storage position and the deployment position, which may cause the support of the base device to become unstable.

[0005] SUMMARY OF THE PRESENT INVETION The present invention has been proposed in view of the above, and has an object to provide a distributor for supplying concrete that can solve the problems of the conventional structure with a simple structure. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a concrete supply distributor comprising a base device, a mast device supported in an upright position on the base device, and a boom device mounted on the mast device, the base device having a base body and outriggers the base portions of which are rotatably supported on the base body via pivot shafts, the outriggers being rotatable between a stored position close to the base body and a deployed position projecting outward from the stored position, the outriggers In front Expanded position or any of the above storage positions The first feature of this invention is that each of the outriggers and the base body is provided with a pin insertion hole into which a connecting pin capable of fixing the outrigger to the base body when the outrigger is in the position can be removably inserted for the fixation, and that the outrigger has a plurality of pin insertion holes.

[0007] The present invention also relates to a concrete supply distributor comprising a base device, a mast device supported in an upright position on the base device, and a boom device mounted on the mast device, the base device having a base body and outriggers whose base portions are rotatably supported on the base body via pivot shafts, the outriggers being rotatable between a stored position close to the base body and a deployed position projecting outward from the stored position, In front Expanded position or any of the above storage positions a pin insertion hole into which a connecting pin capable of fixing the outrigger to the base body when the outrigger is in the position is removably inserted for the fixing is provided in each of the outrigger and the base body; The outriggers are plural, and each outrigger is provided with The pin insertion hole provided in the base body is Each The second characteristic is that it is plural.

[0008] The present invention also provides A concrete supply distributor comprising a base device, a mast device supported in an upright position on the base device, and a boom device mounted on the mast device, the base device having a base body and outriggers whose base parts are rotatably supported on the base body via pivot shafts, the outriggers being rotatable between a stored position close to the base body and a deployed position projecting outward from the stored position, the outriggers and the base body each having a pin insertion hole into which a connecting pin capable of fixing the outrigger to the base body when the outrigger is at least in the deployed position is inserted so as to be removable for the fixing.The third feature is that the outrigger has the pin insertion hole on the outrigger side at its tip and base, and the base body has a first pin insertion hole on the base body side for cooperating with the pin insertion hole on the tip side of the outrigger to fix the outrigger in the stored position, and a plurality of second pin insertion holes on the base body side for cooperating with the pin insertion hole on the base side of the outrigger to fix the outrigger in the deployed position, and some of the plurality of second pin insertion holes are inserted into the connecting pin together with one of the pin insertion holes on the base side of the outrigger, thereby enabling the outrigger to be fixed in the stored position.

[0009] The present invention also relates to A concrete supply distributor comprising a base device, a mast device supported in an upright position on the base device, and a boom device mounted on the mast device, the base device having a base body and outriggers whose base parts are rotatably supported on the base body via pivot shafts, the outriggers being rotatable between a stored position close to the base body and a deployed position projecting outward from the stored position, the outriggers and the base body each having a pin insertion hole into which a connecting pin capable of fixing the outrigger to the base body when the outrigger is at least in the deployed position is inserted so as to be removable for the fixing. The outrigger has the pin insertion hole on the outrigger side at its tip and base, and the base body has a first pin insertion hole on the base body side for cooperating with the pin insertion hole on the tip side of the outrigger to fix the outrigger in the stored position, and a second pin insertion hole on the base body side for cooperating with the pin insertion hole on the base side of the outrigger to fix the outrigger in the deployed position, the first pin insertion hole and the second pin insertion hole have the same inner diameter, and the connecting pin that is inserted into the second pin insertion hole when the outrigger is deployed is inserted into the first pin insertion hole when the outrigger is stored to fix the outrigger in the stored position.

[0010] Furthermore, the present invention has a fifth feature in addition to any of the first to fourth features, in that the outrigger has an outrigger body and an extension portion fixed to the outrigger body and extending outward from the outer surface of the outrigger body, and the pin insertion hole on the outrigger side is provided in the extension portion.

[0011] In addition to the second feature, the present invention further comprises the above-mentioned eachThe outrigger has the pin insertion hole on the outrigger side at its tip and base, and the base body has a first pin insertion hole on the base body side for cooperating with the pin insertion hole on the tip side of the outrigger to fix the outrigger in the stored position, and a second pin insertion hole on the base body side for cooperating with the pin insertion hole on the base side of the outrigger to fix the outrigger in the deployed position, the first pin insertion hole and the second pin insertion hole have the same inner diameter, and the connecting pin that is inserted into the second pin insertion hole when the outrigger is deployed is inserted into the first pin insertion hole when the outrigger is stored to fix the outrigger in the stored position.A sixth feature of the present invention is that the connecting pin that is inserted into the second pin insertion hole when the outrigger is deployed is inserted into the first pin insertion hole when the outrigger is stored to fix the outrigger in the stored position. Effect of the Invention

[0012] According to the present invention, an outrigger Exhibition open position or in the storage position A pin insertion hole into which a connecting pin capable of fixing the outrigger to the base body when the outrigger is in the deployed position is provided in each of the outriggers and the base body so as to be removable for the fixing is inserted. or in the storage position When the outrigger is in the deployed position, the connecting pin is inserted into each pin insertion hole of the outrigger and the base body, so that the outrigger can be placed in the deployed position relative to the base body. or storage position This allows the base device, and therefore the distributor, to be supported more stably.

[0013] According to a third feature, the outrigger has outrigger-side pin insertion holes at its tip and base, the base body has a first pin insertion hole at the base body for cooperating with the pin insertion hole at the tip of the outrigger to fix the outrigger in the stored position, and a plurality of second pin insertion holes at the base body for cooperating with the pin insertion hole at the base of the outrigger to fix the outrigger in the deployed position, and some of the plurality of second pin insertion holes can be inserted into the connecting pin together with one of the pin insertion holes at the base of the outrigger to fix the outrigger in the stored position. This makes it possible to use some of the plurality of second pin insertion holes at the base body and one of the pin insertion holes at the base of the outrigger not only for fixing the outrigger in the deployed position but also for fixing it in the stored position, which can contribute to simplifying the fixing structure and ultimately reducing costs.

[0014] Also Fourth ,6th According to this feature, the inner diameters of the first pin insertion hole and the second pin insertion hole are the same, and the connecting pin that is inserted into the second pin insertion hole when the outrigger is deployed is inserted into the first pin insertion hole when the outrigger is stowed to fix the outrigger in the stored position.Therefore, even if the outrigger is fixed in the stowed position with only a single connecting pin, that connecting pin can also be used to fix the outrigger in the deployed position, which contributes to simplifying the fixing structure and ultimately reducing costs.

[0015] Furthermore, according to a fifth feature, the outrigger has an outrigger body and an extension portion fixed to the outrigger body and extending outward from the outer surface of the outrigger body, and the pin insertion hole on the outrigger side is provided in the extension portion. This allows the pin insertion hole to be arranged with a high degree of freedom in the outrigger (particularly the extension portion) without affecting the cross-sectional shape of the outrigger body, thereby preventing the occurrence of stress concentration parts (and therefore weak parts) in the outrigger due to the special provision of the pin insertion holes, and ensures sufficient strength for the outrigger. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1A is a vertical cross-sectional view showing an example of an operating state of a distributor according to an embodiment of the present invention, and FIG. 1B is a view taken along the arrow 1B in FIG. [Diagram 2] Overall side view of the base device (enlarged view of the portion viewed from the arrow 2 in FIG. 1(A)) [Diagram 3] FIG. 3 is a plan view of the base device (view taken along the arrow 3 in FIG. 2 ); [Figure 4] FIG. 4 is a partially cutaway enlarged plan view of the portion indicated by the arrow in FIG. 3. [Diagram 5](A) is a cross-sectional view taken along line 5A-5A in FIG. 4, and (B) is a cross-sectional view taken along line 5B-5B in FIG. 4. [Figure 6] 6(a) is an exploded plan view of the main part of the base body and the outriggers as viewed from the same side as in FIG. 4, (b) is a cross-sectional view taken along line bb in FIG. 6(a), and (c) is a cross-sectional view taken along line cc in FIG. 6(a). [Figure 7] Overall perspective view of the base device [Figure 8] A simplified plan view showing the relationship between the upper and lower connecting pins and the upper and lower pin insertion holes that are in an operational state when the outriggers are stowed and deployed. [Figure 9] Side view of the main part of the mast device [Figure 10] 9A is a cross-sectional view taken along line 10A-10A in FIG. 9, (B) is a cross-sectional view taken along line 10B-10B in FIG. 9, and (C) is a cross-sectional view taken along line 10C-10C in FIG. 9. [Figure 11] FIG. 1 is an overall side view of a boom device in which a boom row is in a horizontal position (an enlarged side view of the portion indicated by the arrow 11 in FIG. 1). [Figure 12] (A) is a cross-sectional view taken along line 12A-12A in FIG. 11, and (B) is a cross-sectional view taken along line 12B-12B in FIG. 12(A). [Figure 13] Overall perspective view of the boom support base [Figure 14] Schematic diagram of the distributor's [assembly process] [Figure 15] 14(A) is an enlarged side view of the portion indicated by the arrow 15A in FIG. 14, and FIG. 15(B) is an enlarged side view of the portion indicated by the arrow 15B in FIG. 15(A). [Figure 16] Schematic diagram of the distributor's [refilling process] [Figure 17] 16(F) and (B) is an enlarged side view of the portion indicated by the arrow 17A in FIG. 16(F), and (B) is an enlarged side view of the portion indicated by the arrow 17B in FIG. 17(A). [Figure 18] 17(A) is an enlarged side view of the portion indicated by the arrow 18A in FIG. 17(B), and FIG. 17(B) is an enlarged side view of the portion indicated by the arrow 18B in FIG. 17(A). [Figure 19] A schematic diagram showing variations of the latter stages of the distributor's [refilling process] [Figure 20]20A is a schematic diagram showing the mutual coupling relationship between the upper and lower frames and the upper and lower bearings, in which (A) is a schematic plan view of the embodiment, (B) is a schematic side view of the embodiment (viewed in the direction of arrow 20B in FIG. 20A), (C) is a schematic plan view of another embodiment, and (D) is a schematic side view of another embodiment (viewed in the direction of arrow 20D in FIG. 20C). [Figure 21] FIG. 1 is a circuit diagram showing an outline of a grease supply system according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying

[0018] The concrete supply distributor D is used to receive ready mixed concrete for constructing various parts of the structure (such as floor slabs and walls) at a construction site such as a building from a concrete pump (not shown) placed on the ground at the site, and supply it to various parts of the casting site located at an elevated position. An example of its use is shown in Figure 1.

[0019] This distributor D comprises a base device 10 serving as a foundation, a height-adjustable mast device 20 supported in an upright state on the base device 10, and a boom device 30 mounted on the mast device 20. Next, an example of each of the devices 10, 20, 30 will be described in order with reference to Figs. 2 to 13.

[0020] First, the base device 10 will be described with reference to Figures 2 to 7. The base device 10 has a base body 10m and an outrigger 16 whose base portion 16b is rotatably supported on the base body 10m via a rotational support shaft 17. The outrigger 16 is rotatable between a storage position 16B that fits within the base body 10m and a predetermined deployment position 16A that projects outward from the storage position 16B (i.e., outside the base body 10m). The base body 10m is made up of a rigid frame formed by a plurality of metal frames.

[0021] That is, the base main body 10m includes a base frame 11 serving as a central skeleton, and this base frame 11 integrally includes a square tube portion 11b formed in a rectangular cross section and extending in the vertical direction, and four vertical walls 11a extending radially from the tops of the square tube portion 11b on the front, rear, left and right sides. Since each vertical wall portion 11a has a complex three-dimensional shape as is clear from Figs. 2 to 7, it is formed by integrally connecting (for example, by welding, bolting, etc.) a plurality of wall elements to each other. Note that a bracket 11ab with a locking hole for locking the lower end of a hanging wire is fixed (for example, by welding, etc.) to the upper part of each vertical wall portion 11a when the base device 10 is hung independently by a crane (for example, see Fig. 14(A)).

[0022] In particular, the rectangular tube portion 11b in this embodiment has a cross-sectional shape that is approximately the same as that of a mast M of the mast device 20, which will be described later, and a number of connecting blocks 21 are fixed at intervals to the outer periphery of the upper end of this rectangular tube portion 11b. Using these connecting blocks 21 and a number of connecting blocks 21' fixed to the outer periphery of the lower end of the lowest mast M, the lowest mast M and the rectangular tube portion 11b (and therefore the base body 10m) are connected to each other, as will be described later.

[0023] The base body 10m also includes the above-mentioned base frame 11, a plurality of upper frames 12 (four in the illustrated example) fixed to the base frame 11 and arranged to surround the base frame 11, an upper bearing 14 connecting adjacent ends of adjacent upper frames 12, a plurality of lower frames 13 fixed to the base frame 11 and arranged at intervals directly below the upper frames 12 corresponding to the plurality of upper frames 12, and a lower bearing 15 connecting adjacent ends of adjacent lower frames 13. The upper bearing 14 and the lower bearing 15 each include a cylindrical bearing body 14b, 15b and a surrounding frame 14k, 15k fixed (for example, welded) to the bearing body 14b, 15b and surrounding the outer periphery thereof. A plurality of support legs 13a that can be grounded are provided protruding from the lower surface of the lower frame 13.

[0024] Thus, the upper bearing 14 is structured to be joined to the adjacent ends of the adjacent upper frames 12 so as to connect them, so that the upper bearing 14 is joined to the adjacent ends of the upper frames 12 so that at least a part of the upper bearing 14 is located inward (i.e., toward the square tube portion 11b, in other words, toward the center of the base body 10m) from the intersection point O of the extension lines of the outer surfaces of the adjacent upper frames 12 along the longitudinal direction in a plan view. On the other hand, the lower bearing 15 is structured to be joined to the adjacent ends of the adjacent lower frames 13 so as to connect them, so that the lower bearing 15 is joined to the adjacent ends of the adjacent lower frames 13 so that at least a part of the lower bearing 15 is located inward (i.e., toward the square tube portion 11b, in other words, toward the center of the base body 10m) from the intersection point O of the extension lines of the outer surfaces of the adjacent lower frames 13 along the longitudinal direction in a plan view.

[0025] As a result, the outrigger base 16b disposed between the upper bearing 14 and the lower bearing 15 is disposed in the space between the upper bearing 14, which is connected to the adjacent end of the adjacent upper frame 12 near the inside of the base frame 11 (i.e., near the square tube portion 11b, in other words, near the center of the base body 10m), and the lower bearing 15, which is connected to the adjacent end of the adjacent lower frame 13 near the inside of the base frame 11 (i.e., near the square tube portion 11b, in other words, near the center of the base body 10m). Therefore, the outrigger 16 can be effectively prevented from protruding outward from the base body 10m (i.e., the frame including the base frame 11 and the upper and lower frames 12 and 13) during storage, so that the base device 10 can be made compact and the occupied space can be reduced. As a result, the base device 10 can be easily moved through a narrow space at a construction site (for example, a through hole that penetrates a floor slab vertically, etc.), improving workability.

[0026] The above-mentioned surrounding frames 14k, 15k have plate-shaped surrounding frame bodies 140, 150 that surround the bearing bodies 14b, 15b with an annular gap therebetween, and upper and lower pairs of first and second support plate parts 141, 142; 151, 152 that are fixed (for example, butt-welded) to the upper and lower ends of the surrounding frame body 140, 150 so as to sandwich the surrounding frame body 140, 150 from above and below. The upper and lower pairs of first and second support plate parts 141, 142; 151, 152 are fixed (for example, welded) to the upper bearing 14 or lower bearing 15 that penetrates them.

[0027] In particular, the enclosing frame main body 140, 150 of the embodiment has flat mounting surfaces 14kf, 15kf on the surface facing the upper frame 12 or the lower frame 13, which are perpendicular to the longitudinal center line of the upper and lower frames 12, 13. The end faces 12e, 13e of the upper frame 12 or the lower frame 13 are fixed (butt-welded in the embodiment) to these mounting surfaces 14kf, 15kf. As a result, even if the bearing main body 14b, 15b is cylindrical, the enclosing frame 14k, 15k is interposed between the outer circumferential surface of the bearing main body 14b, 15b and the upper and lower frames 12, 13, so that the load can be transmitted substantially evenly between the bearing main body 14b, 15b and the upper and lower frames 12, 13 without bias, and the load burden of each part is reduced accordingly, thereby improving durability.

[0028] In this embodiment, one (142) of the pair of first and second support plate portions 141, 142 on the upper side and one (151) of the pair of first and second support plate portions 151, 152 on the lower side are formed integrally with a part of the corresponding vertical wall portion 11a of the base frame 11, but these may also be formed separately and later fixed (e.g., by welding, bolting, etc.) to the tip of the vertical wall portion 11a.

[0029] Further, on the outer edge of each vertical wall portion 11a of the base frame 11, midway between the corresponding upper bearing 14 and lower bearing 15, a concave curved portion 18 is formed that is recessed in an arc shape on the inward side (i.e., toward the square tube portion 11b).

[0030] 4, the contact surfaces between the above-mentioned mounting surfaces 14kf, 15kf of the surrounding frame main body 140, 150 and the corresponding upper frame 12 or lower frame 13 are disposed outside of an imaginary vertical plane X that passes through the central axis of the upper bearing 14 or lower bearing 15 surrounded by the surrounding frame 14k, 15k having the mounting surfaces 14kf, 15kf and is parallel to the longitudinal center line of the corresponding upper frame 12 or lower frame 13. This makes it possible to secure a wide support span for the upper and lower bearings 14, 15 by the upper and lower frames 12, 13, thereby increasing the support rigidity for the upper and lower bearings 14, 15.

[0031] Moreover, each outrigger 16 is set to a maximum vertical width L1 (see FIG. 6(c)) smaller than the mutual distance between the opposing faces of the upper and lower frames 12, 13 so that it can enter the space between the corresponding upper and lower frames 12, 13 when stored, and a longitudinal length L2 (see FIG. 6(a)) such that the tip 16a of the outrigger 16 when stored does not interfere with the base 16b of the adjacent outrigger 16. This makes it possible to fully utilize the space between the upper and lower frames 12, 13 as a storage space for the outrigger 16 when stored, while avoiding mutual interference between the base 16b, including the bearing cylinder portion 16ba, of each outrigger 16 and the tip 16a of the adjacent outrigger 16, and therefore makes it possible to more effectively suppress the outrigger 16 from protruding outward from the base body 10m when stored.

[0032] The outrigger body 16m, which is the main part of each outrigger 16, is made of a metal frame having a sturdy hollow closed cross-sectional structure with a flat rectangular cross section, and is formed into a horizontally long rectangle in side view. Each outrigger 16 has a bearing tube portion 16ba extending vertically integrally with the base portion 16b, and each bearing tube portion 16ba is disposed between the corresponding upper bearing 14 and lower bearing 15. When each outrigger 16 is set on the base body 10m, the pivot shaft 17 is inserted into the upper bearing 14, the bearing tube portion 16ba, and the lower bearing 15, which are aligned on the same vertical axis, so as to be relatively rotatable. As a result, the outrigger 16 can pivot around the pivot shaft 17 between a storage position 16B along the upper frame 12 and the lower frame 13 and a deployment position 16A extending outward from the storage position 16B.

[0033] In addition, a retaining means 19 for preventing the rotation support shaft 17 from coming off is interposed between the rotation support shaft 17 and the upper bearing 14 (or the lower bearing 15) so as to be detachable from the upper bearing 14 (or the lower bearing 15).

[0034] As is clear from Figure 3, in the embodiment, the deployment position 16A of the outrigger 16 can be selectively set to a main deployment position 16A0 extending in the extension direction of the vertical wall portion 11a in a plan view, and first and second secondary deployment positions 16A1, 16A2 extending in the respective extension directions of the upper and lower frames 12, 13 on one and the other sides, sandwiching the upper and lower bearings 14, 15.

[0035] In this embodiment, the outriggers 16 and the base main body 10m are provided with pin insertion holes 16h0, 16h1-16h3; 10h0, 10h1, 10h2 into which the connecting pins P1, P2 capable of fixing the outrigger 16 to the base main body 10m are removably inserted when the outrigger 16 is at least in the deployed position 16A (also in this embodiment, when the outrigger is in the stored position 16B). The inner diameters of the pin insertion holes 16h0, 16h1-16h3; 10h0, 10h1, 10h2 are set to the same diameter, and the outer diameters of the upper and lower connecting pins P1, P2 are set to the same diameter that is slightly smaller than the inner diameters.

[0036] In this embodiment, the upper connecting pin P1 is connected to the upper part of each upper bearing 14 via a wire to improve workability and prevent loss, and the lower connecting pin P2 is connected to the outer surface of the base 16b of each outrigger 16 via a wire to improve workability and prevent loss. Incidentally, instead of attaching the connecting pins P1 and P2 to the base main body 10m in this manner, workers may store them in appropriate locations on site and take them out and use them whenever necessary.

[0037] Next, the structure of each pin insertion hole will be specifically described with reference to Figs. 4 to 6. The upper and lower walls 161, 162 of the outrigger body 16m having a rectangular cross section are formed slightly wider than the planar shape of the upper and lower intermediate parts of the outrigger body 16m. The upper and lower extension parts 161f, 162f of the upper and lower walls 161, 162 that protrude outward from the upper and lower intermediate walls of the outrigger body 16m are provided with three pin insertion holes 16h1 to 16h3 on the outrigger 16 side for fixing the deployed position, spaced apart in the circumferential direction, particularly on the base part 16b side of the outrigger 16. The pin insertion holes 16h1 to 16h3 for fixing the deployed position are distributed and arranged at three locations, as is clear from Fig. 6(a), corresponding to the three deployed positions 16A of the outrigger 16 (i.e., the main deployed position 16A0 and the first and second auxiliary deployed positions 16A1, 16A2). Additionally, the upper extension 161f of the tip 16a of the outrigger 16 is provided with a pin insertion hole 16h0 for fixing the storage position.

[0038] Furthermore, at least one of the pin insertion holes 16h0, 16h1 to 16h3 provided on the outrigger 16 side may be provided by drilling a hole in a main part of the outrigger main body 16m, for example a wall part that constitutes the closed cross section of the outrigger main body 16m, instead of providing it in the upper and lower extension portions 161f, 162f.

[0039] On the other hand, the base main body 10m has a pin insertion hole 16h0 on the tip 16a side of the outrigger 16 and a first pin insertion hole 10h0 on the side of the base main body 10m for cooperating with the upper connecting pin P1 to fix the outrigger 16 to the storage position 16B, and this first pin insertion hole 10h0 is arranged in a fixed bracket 12b in the middle part of the upper frame 12.

[0040] In addition, the base main body 10m, particularly the upper and lower support plate portions 141, 142; 151, 152 of the enclosing frames 14k, 15k which clamp the upper and lower bearings 14, 15 from above and below, respectively, have multiple (two in the illustrated example) second pin insertion holes 10h1, 10h2 on the side of the base main body 10m for cooperating with the upper and lower pin insertion holes 16h1 to 16h3 on the base 16b side of the outrigger 16 to fix the outrigger 16 to the three deployed positions 16A0, 16A1, 16A2, respectively.

[0041] As can be seen in Figure 5(A), some of the multiple second pin insertion holes 10h1, 10h2 (particularly the pin insertion hole 10h1 provided in the upper and lower support plate portions 151, 152 of the surrounding frame 15k of the lower bearing 15) can be inserted into the lower connecting pin P2 together with one of the pin insertion holes 16h1 to 16h3 on the base 16b side of the outrigger 16 (the lower pin insertion hole 16h2 in the illustrated example), thereby fixing the outrigger 16 in the storage position 16B.

[0042] FIG. 8 is a diagram that clearly explains how the mutual insertion relationship between the upper and lower connecting pins P1, P2 and the pin insertion holes 16h0, 16h1-16h3; 10h0, 10h1, 10h2 to be used to fix the outrigger 16 in the embodiment to each operating position (i.e., the storage position 16B and the three deployed positions 16A0, 16A1, 16A2) changes.

[0043] In this Figure 8, the thick black dots indicate the connecting pins P1, P2 selected to fix the outrigger 16 in the operating position (16B, 16A0, 16A1, 16A2), and the reference symbols of the pin insertion holes in parentheses indicate the pin insertion holes into which the selected connecting pins P1, P2 are inserted.

[0044] In this manner, in this embodiment, when the outrigger 16 is in the storage position 16B or the deployed position 16A, by inserting the connecting pins P1, P2 into the pin insertion holes 16h1-16h3, 10h1, 10h2 of the outrigger 16 and the base main body 10m, the outrigger 16 can be securely fixed to the storage position 16B or the deployed position 16A, respectively, relative to the base main body 10m, thereby stabilizing support of the base device 10 and, ultimately, support of the distributor D.

[0045] Moreover, the outrigger 16 of the embodiment has an outrigger main body 16m and extending portions 161f, 162f fixed to the outrigger main body 16m and extending outward from the outer surface of the outrigger main body 16m, and the pin insertion holes 16h0, 16h1 to 16h3 on the outrigger 16 side are provided in the extending portions 161f, 162f. This not only makes it possible to arrange the pin insertion holes 16h0, 16h1 to 16h3 in the outrigger 16 (particularly the extending portions 161f, 162f) with a high degree of freedom without affecting the cross-sectional shape of the outrigger main body 16m, but also makes it possible to avoid the occurrence of stress concentration portions (and therefore weak portions) in the outrigger 16 due to the special provision of the pin insertion holes 16h0, 16h1 to 16h3, and ensures sufficient strength for the outrigger 16.

[0046] In addition, the outrigger 16 in this embodiment has pin insertion holes 16h0, 16h1 to 16h3 on the outrigger 16 side at its tip 16a and base 16b, respectively, while the base main body 10m has a first pin insertion hole 10h0 on the base main body 10m side for cooperating with the pin insertion hole 16h0 on the tip 16a side of the outrigger 16 to fix the outrigger 16 to the storage position 16B, and two second pin insertion holes 10h1, 10h2 on the base main body 10m side for cooperating with the three pin insertion holes 16h1 to 16h3 on the base 16b side of the outrigger 16 to fix the outrigger 16 to the deployed position 16A (more specifically, the main deployed position 16A0, and the first and second secondary deployed positions 16A1, 16A2). Then, a part (lower pin insertion hole 10h1) of the second pin insertion holes 10h1, 10h2, together with one (lower pin insertion hole 16h2) of the pin insertion holes 16h1-16h3 on the base 16b side of the outrigger 16, is inserted into the lower connecting pin P2, thereby fixing the outrigger 16 to the storage position 16B. As a result, the part 10h1 of the two second pin insertion holes 10h1, 10h2 on the base main body 10m side, one 16h2 of the three pin insertion holes 16h1-16h3 on the outrigger base 16b side, and the lower connecting pin P2 can be used not only to fix the outrigger 16 to the deployed position 16A but also to fix the outrigger 16 to the storage position 16B, which contributes to simplifying the fixing structure and ultimately reducing costs.

[0047] In the above embodiment, two upper and lower connecting pins P1, P2 are inserted into two pin insertion holes 10h0, 10h1 on the base body 10m at two locations, one on the tip 16a side and one on the base 16b side, of the outrigger 16 to fix the outrigger 16 to the storage position 16B. However, only one connecting pin (for example, the upper connecting pin P1) may be used to fix the outrigger 16 to the storage position 16B.

[0048] In this case, for example, the upper connecting pin P1, which is inserted into one 10h1 of the second pin insertion holes 10h1, 10h2 when the outrigger 16 is deployed, may be inserted into the first pin insertion hole 10h0 when the outrigger 16 is stowed to fix the outrigger 16 to the stowed position 16B. As a result, even when the outrigger 16 is fixed to the stowed position 16B with only a single connecting pin P1, that connecting pin P1 can also be used to fix the outrigger 16 to the deployed position 16A, thereby simplifying the fixing structure and thereby reducing costs.

[0049] Although not shown, the outrigger 16 may be fixed in the storage position 16B and the deployed position 16A by using dedicated connecting pins for each. In this case, for example, the storage position 16B and the deployed position 16A can be fixed by one dedicated pin each, but the hole provided in the outrigger 16 for fixing the storage position 16B is disposed at the tip of the outrigger 16, and the hole provided in the outrigger 16 for fixing the deployed position 16A is disposed at the base of the outrigger 16.

[0050] Next, an example of the mast assembly 20 will be described with reference to FIGS.

[0051] The mast assembly 20 is divided into a plurality of masts M which are supported in an upright state on the base assembly 10 and connected to each other in a vertical row, and the overall length (and therefore the overall height) of the mast assembly 20 can be increased (higher) by increasing the number of connected masts M. A boom assembly 30 is mounted on the upper part of the mast assembly 20 (i.e., on the upper part of the uppermost mast M).

[0052] The masts M are basically of the same structure, and have a sturdy closed cross-sectional structure with a rectangular cross section. A ladder 23 is fixed to the outer periphery of each mast M so that an operator can ascend and descend along the mast assembly 20, and a work platform 24 is fixed to the top of the highest mast M so that an operator can safely perform various tasks thereon. These fixing operations are performed in advance, for example, by a fixing means (e.g., bolting, pinning, caulking, etc.) not shown, before the mast assembly 20 is installed on the base assembly 10. The above-mentioned various operations on the work platform 24 include, for example, the operation of connecting the mast assembly 20 and the boom assembly 30 in the "assembly process" of the distributor D described later, the operation of connecting various pipes, and also the maintenance operations such as inspection and maintenance of each part of the boom support BS and lubrication.

[0053] Furthermore, connecting pipes 28 that can be connected to a concrete pumping pipe extending from a concrete pump (not shown) and that extend in a vertical arrangement along the mast M are fixed to the outer periphery of each mast M, and adjacent connecting pipes 28 can be connected to each other in a liquid-tight manner by appropriate joints. In this embodiment, the length of the connecting pipes 28 is set to 1 / 2 the length of one mast M, and for example, two 2 m connecting pipes 28 are connected in series for a mast M with a total length of 4 m.

[0054] A plurality of connecting blocks 21, 21' are fixed (for example, welded) to the outer periphery of the upper and lower ends of each mast M, arranged at the same circumferential position at both ends and spaced apart from each other in the circumferential direction. The connecting blocks 21, 21' fixed to the outer periphery of the adjacent ends of a pair of adjacent masts M abut against each other in a state in which the two masts M are vertically arranged. At least one convex portion 22t is provided on one of the abutment surfaces 22, 22' (i.e., the abutment surface facing upward), and at least one concave portion 22d is provided on the other abutment surface 22, 22' (i.e., the abutment surface facing downward). These convex portion 22t and concave portion 22d engage with each other so as to correctly position the pair of adjacent masts M relative to each other and to suppress circumferential and radial positional deviations between the pair of masts M in the directions along the abutment surfaces 22, 22'.

[0055] The pair of connecting blocks 21, 21' that abut against each other are integrally connected to each other by a plurality of bolts 25 that penetrate both connecting blocks 21, 21', and this connection maintains the connecting blocks 21, 21' in abutment with each other, and therefore the engagement between the convex portions 22t and the concave portions 22d. In this case, the fastening effect of the abutting surfaces by the bolts 25 and the meshing effect of the concave-convex engaging portions combine (i.e., the cooperation of the connecting blocks 21, 21' and the bolts 25), making it possible to tightly and firmly connect both masts M to each other while reliably preventing misalignment of the pair of adjacent masts M.

[0056] 10(A) and 10(B), the bolts 25 of the embodiment include a first bolt 25 penetrating the tip surface of the convex portion 22t and the bottom surface of the concave portion 22d abutting the tip surface, a second bolt 25 penetrating the abutment surfaces 22, 22' of the joining blocks 21, 21' on one side of the convex portion 22t, and a third bolt 25 penetrating the abutment surfaces 22, 22' of the joining blocks 21, 21' on the other side of the convex portion 22t. This allows the clamping effect of the abutment surfaces by the first to third bolts to be more strongly exerted at the engagement portions between the convex portions and the concave portions and their surrounding areas, thereby enhancing the interlocking effect of the concave-convex engagement portions, making it possible to more reliably prevent positional deviation between a pair of adjacent masts and to firmly join the two masts.

[0057] Incidentally, instead of using the first to third bolts 25 described above, it is also possible to connect the two masts M, M using only the first bolt 25 that penetrates the convex portion 22t and the concave portion 22d. It is also possible to connect the two masts M, M using the second and third bolts 25 that penetrate both sides of the convex portion 22t and the concave portion 22d.

[0058] As is clear from Figures (B) and (C), the connecting blocks 21, 21' in this embodiment are arranged so that the abutment surfaces 22, 22' each protrude beyond the end face of the mast M to which they are fixed on the outer periphery of the end. This leaves a certain amount of clearance 29 between the opposing end faces of adjacent masts M. This allows the connecting blocks 21, 21' to abut against each other accurately without being affected by machining errors on the end faces of the masts M, making it possible to accurately connect adjacent masts M while reducing the machining costs of the masts M.

[0059] Incidentally, the clearance 29 may be omitted and the opposing end faces of the adjacent masts M may be brought into direct contact with each other.

[0060] Thus, the concave-convex engagement of the abutment surfaces of the above-mentioned joining blocks 21, 21' makes it easy to position a pair of adjacent masts M relative to each other, and the above-mentioned concave-convex engagement reliably prevents misalignment of the pair of masts M relative to each other in the direction along the abutment surfaces, so that the joining work of the masts M can be carried out quickly and accurately, greatly improving work efficiency.

[0061] Furthermore, a projection 21t is integrally formed on the back surface of each of the connecting blocks 21, 21', i.e., the surface 26 facing the outer periphery of the mast M, to fit into a support hole 27 provided in the end of the mast M with which the connecting blocks 21, 21' contact. By fitting this projection 21t into the support hole 27, the installation portion of each connecting block 21, 21' on the end of the mast M can be easily and accurately positioned. Moreover, the fitting portion between the projection 21t and the support hole 27 is welded, and the outer periphery of the facing surface 26 of the connecting blocks 21, 21' is welded over a wide area in the circumferential direction to the outer surface of the mast M, so that the welded area can be increased as a whole, and as a result, the connection strength between each connecting block 21, 21' and the mast M can be effectively increased as a whole.

[0062] Furthermore, the concave-convex engagement portion formed by the protrusions 21t and the support holes 27 may be omitted on the opposing surfaces between the back surfaces of the connecting blocks 21, 21' and the outer periphery of the mast M, in which case the opposing surfaces, each of which has a flat surface, are directly brought into plane contact with each other and welded.

[0063] In this embodiment, the concave-convex engagement structure of the contact surfaces of the joining blocks 21, 21' is exemplified by a structure in which the convex portions 22t and the concave portions 22d provided on one and the other of the contact surfaces are formed as step-like concave-convex surfaces. However, the concave-convex engagement structure is not limited to the embodiment, and for example, a protrusion and a concave hole that fit into each other may be formed as a convex portion and a concave portion.

[0064] In the above description of the structure of the base frame 11 of the base device 10, it was explained that a plurality of connecting blocks 21 are fixed at intervals to the outer periphery of the upper end of the square tube portion 11b, which has approximately the same cross-sectional shape as the mast M. The connecting blocks 21 of this square tube portion 11b have the same structure as the connecting blocks 21 on the upper end side of the mast M, and the structure for fixing the blocks to the square tube portion 11b is also similar to the structure for fixing the connecting blocks 21, 21' to the mast M. In other words, the method for connecting the connecting block 21 of the square tube portion 11b to the connecting block 21' fixed to the lower end of the lowermost mast M is the same as the method for connecting the connecting blocks 21, 21' between adjacent masts M described above.

[0065] Next, an example of the boom device 30 will be described with reference to FIGS.

[0066] The boom device 30 comprises a boom train BT consisting of a plurality of booms B1-B4 arranged in series with each other and pivotally connected to each other so that they can be flexibly swung, and a boom support base BS that is attached to the upper part of the mast device 20 (specifically, the upper end part of the uppermost mast M) and supports the first boom B1, the most base side in the boom train BT, so that it can be raised and lowered by pivot J1.

[0067] The boom support base BS comprises a fixed base 31 fixed to the upper part of the mast device 20, and a swivel base 32 supported on the fixed base 31 so as to be rotatable via a vertical swivel axis J5, and the upper part of the swivel axis J5 is connected to the swivel base 32 so as to rotate integrally therewith.

[0068] A plurality of slewing bearings 31b are fixed in the fixed base 31, which engage and support the slewing shaft J5 so that it cannot move axially relative to the actuator but can rotate relative to the actuator. An interlocking connection mechanism (not shown) is provided between the slewing shaft J5 and a slewing actuator (not shown) in the fixed base 31, which forcibly rotates the slewing shaft J5 (and therefore the slewing base 32) about the vertical axis in conjunction with the actuator. Since the structures of the slewing actuator and the interlocking connection mechanism are well known in the technical field of crane apparatuses with multi-stage booms, a cover body 31c which is connected to the fixed base 31 and covers the actuator and the interlocking connection mechanism is merely illustrated in Figures 12 and 13, and further explanation will be omitted.

[0069] A plurality of connecting blocks 21' of the same structure as those fixed to the lower end of the mast M are fixed to the outer periphery of the lower end of the fixed base 31, and the fixed base 31 and the uppermost mast M are connected by abutting the connecting block 21' on the fixed base 31 side and the connecting block 21 on the upper end side of the uppermost mast M and fastening them together with bolts 25. In other words, the method of connecting the connecting block 21' on the fixed base 31 side to the connecting block 21 on the upper end side of the uppermost mast M is the same as the method of connecting the connecting blocks 21, 21' between adjacent masts M.

[0070] The swivel base 32 includes a swivel base main body 32m to which the upper end of the swivel shaft J5 is fixed, and a pair of left and right standing wall portions 32s integrally provided on the upper surface of the swivel base main body 32m, with both standing wall portions 32s connected by a plurality of connecting walls 32c. Meanwhile, the base of the first boom B1 is formed in a U-shape in cross section so as to sandwich both standing wall portions 32s from both the left and right sides.

[0071] A pair of left and right side wall portions 35 of the base of the first boom B1 and adjacent upright wall portions 32s of the swivel base 32 are connected to each other via a pair of left and right short cylindrical pivot shafts J1 so as to be capable of relative rotation. Thus, the first boom B1 is supported on the swivel base 32 so as to be capable of hoisting and pivoting about the pivot shafts J1. Therefore, the pivot shafts J1 constitute a pivot support portion that pivotally supports the first boom B1 on the swivel base 32 so as to be capable of hoisting and pivoting.

[0072] The revolving shaft J5 is formed in a cylindrical shape extending in the vertical direction, and a first relay pipe 38, which is held by the fixed base 31 and passes through the inside and outside of the fixed base 31, is inserted partway through the hollow portion. The upstream end (i.e., the lower end) of this first relay pipe 38 is liquid-tight connected via a joint to the downstream end (i.e., the upper end) of the connection pipe 28 provided along the uppermost mast M described above. Meanwhile, the portion (upper part) of the first relay pipe 38 downstream of the revolving shaft J5 is drawn out to the outside of the first boom B1 via one of the left and right pivot shafts J1, and the drawn-out end, i.e., the downstream end, is liquid-tight connected to a second relay pipe 39 described below that is arranged on the boom row BT side.

[0073] In the boom train BT, a hydraulic cylinder C1 is interposed between the first boom B1 and the boom support base BS (particularly the upright wall portion 32s of the swivel base 32 described later) to forcibly raise and lower the first boom B1 relative to the boom support base BS. Hydraulic cylinders C2 to C4 are interposed between adjacent booms in the boom train BT (i.e., between the first boom B1 at the base end and the next second boom B2, between the second boom B2 and the next third boom B3, and between the third boom B3 and the fourth boom B4 at the most distal end), respectively, to forcibly flex and swing between them, either directly or via a link mechanism.

[0074] A hydraulic supply system (including, for example, an oil tank, hydraulic pump, control valve, etc.) installed on the boom support base BS (particularly the fixed base 31 described later) is connected to each of the hydraulic cylinders C1-C4 via hydraulic piping (not shown) routed along the boom row BT. The supply and discharge of hydraulic pressure between this hydraulic supply system and each of the hydraulic cylinders C1-C4 is controlled based on the operation of an operator. The configuration of the hydraulic control system is also well known in the technical field of multi-boom crane equipment.

[0075] Further, a flexible blow-out tube 37 capable of blowing out ready mixed concrete from its tip is attached to the tip of the fourth boom B4. The base end of this blow-out tube 37 and the downstream end of the aforementioned connection pipe 28 installed along the mast M are connected via the first relay pipe 38 provided on the boom support base BS and a second relay pipe 39 supported by each of the booms B1-B4 of the boom row BT and arranged along each of the booms B1-B4.

[0076] The second relay pipe 39 is bent at a folded portion midway through the hollow pivots J2 to J4 which serve as pivotal connections between the adjacent booms B1, B2; B2, B3; B3, B4, and is routed along the adjacent booms B1 to B4.

[0077] Moreover, the upstream end of the second relay pipe 39 and the downstream end of the first relay pipe 38 are connected via a joint that connects them to be relatively rotatable around the axis of the pivot J1. Also, joints that connect the upstream pipe section and the downstream pipe section to be relatively rotatable are provided midway along the second relay pipe 39, particularly near each of the turnback sections. Therefore, these joints enable the second relay pipe 39 to smoothly follow the up-down rotation and bending swing of the first boom B1 and the bending and swinging of adjacent booms B1, B2; B2, B3; B3, B4 relative to each other.

[0078] Meanwhile, on the fixed base 31, a plurality of first attachment parts T1 are installed which are used when the boom row BT is folded and in a horizontal position (see FIG. 15) or a vertical position (see FIG. 17) and can be connected to the first ropes W1 by a crane to hoist the boom device 30 via the first ropes W1. In this embodiment, the first ropes W1 connected to the respective first attachment parts T1 are composed of a single wire 51 (see FIG. 15) each having an eye-shaped connected part 51a at both ends. Note that, since a crane for hoisting the boom device 30 is conventionally well known, the crane body is not shown in the embodiment, and only a crane hook 80 suspended from the boom tip of the claim body via a wire is shown.

[0079] In particular, in this embodiment, two sets of pairs of first mounting parts T1 arranged at intervals in a predetermined direction (hereinafter simply referred to as the width direction of the boom row BT) along the axis of the pivot J1 of the base of the first boom B1 are disposed on the fixed base 31 at intervals in a horizontal direction perpendicular to the width direction (i.e., four locations in total on the front, back, left and right sides of the fixed base 31). It is noted that three or more sets of pairs of first mounting parts T1 may be provided.

[0080] Therefore, when the boom row BT is in a vertical position and the boom device 30 is lifted by a crane via the first ropes W1, if the boom support base BS is lifted by the same number of first ropes W1 via the first mounting parts T1 that are distributed at at least three or more locations spaced apart from each other, the boom device 30 can be lifted in as stable a vertical position as possible.

[0081] Each of the first mounting portions T1 includes a support wall 41w with a support hole 42 provided in each of four support brackets 41 fixed to the fixed base 31, and a connector 40 detachably connected to the support wall 41w, and the connector 40 includes a U-shaped connecting hook 43 having a pair of arms 43a that sandwich the support wall 41w, and a mounting shaft 44 that passes through both arms 43a and the support hole 42 of the support wall 41w so as to be relatively rotatable. A knob 44a that also serves as a stopper and engages with one arm 43a is integrally provided on one end of the mounting shaft 44, and a stopper member 45 (e.g., a split pin) that engages with the other arm 43a is detachably engaged with the other end of the mounting shaft 44.

[0082] To attach the eye-shaped connected portion 51a of the first rope W1 to the first attachment portion T1, for example, the split pin 45 is removed and the attachment shaft 44 is pulled out from the support wall 41w to remove the connecting hook 43 from the support bracket 41, and this is then connected (inserted) to the connected portion 51a of the first rope W1, and the connecting hook 43 is then reattached to the support bracket 41 via the attachment shaft 44 in the reverse order to the previous procedure. In this case, the attachment shaft 44 functions as a locking member that closes the gap between both arms 43a of the connecting hook 43 when it is set on the connecting hook 43, thereby reliably maintaining the connection between the connecting hook 43 (and therefore the first attachment portion T1) and the connected portion 51a at the end of the first rope W1.

[0083] The structure of the connector 40 that connects the connected portion 51a of the first rope W1 to the first mounting portion T1 is not limited to the embodiment, and may be any connector structure that is attached to at least the fixed base 31 (support bracket 41) and can be attached and detached as needed to the connected portion 51a of the first rope W1. For example, as a variation (not shown) of the connector 40, a hook-shaped connecting hook whose hook opening is always open, or a hook with a stopper piece that supports a stopper piece for preventing disengagement on the hook body and that can open and close the hook opening, and that is always resiliently biased to a position that closes the hook opening, may be used as the connector.

[0084] Incidentally, the first mounting part T1 described above is provided on the boom support base BS, particularly the fixed base 31, via the support bracket 41, but it may also be provided directly on the fixed base 31. Also, instead of providing the first mounting part T1 on the fixed base 31, it may be provided on the swivel base 32 directly or via a support member such as a bracket.

[0085] Further, a second attachment part T2 is provided midway along the first boom B1, which is used when the boom device 30 is hoisted by a crane via the second rope W2 while the boom row BT is in a horizontal position and which can be connected to the second rope W2. The second rope W2 connected to the second attachment part T2 is formed of a single wire 52 (see FIG. 15) having eye-shaped connected parts 52a at both ends, similar to the first rope W1.

[0086] The installation location of the second mounting part T2 is set at a location such that when the boom device 30 is lifted by a crane via the first and second ropes W1, W2 with the boom row BT in a horizontal position, the center of gravity of the entire boom device 30 (see reference symbol G in Figure 15) is midway between the first and second mounting parts T1, T2 in the longitudinal direction of the boom row BT.

[0087] The second mounting part T2 is equipped with, for example, a connecting arm 46 that straddles the middle part of the first boom B1 from above, and a connector 40 that is detachably connected to an upper support wall 46w of the connecting arm 46, and a pair of bifurcated legs 46a of the connecting arm 46 are rotatably supported by shafts 46p on the left and right side walls of the first boom B1, respectively. The connector 40 has the same structure as the connector 40 of the first mounting part T1 described above, that is, a U-shaped connecting hook 43 is rotatably supported by a mounting shaft 44 in a support hole provided in the upper support wall 46w.

[0088] Then, in a state in which the mounting shaft 44 is removed and the connecting hook 43 is separated from the upper support wall 46w, the connecting hook 43 is engaged with the eye-shaped connected portion 51a of the second rope W2 and then reattached to the upper support wall 46w via the mounting shaft 44, whereby the second rope W2 can be detachably connected to the upper support wall 46w of the first boom B1 via the connector 40 and the connecting arm 46. Note that, like the first mounting part T1, the connector 40 of the second mounting part T2 is not limited to the embodiment, and for example, variations not shown that have been described for the first mounting part T1 can also be employed.

[0089] 15, when the boom device 30 is hoisted by a crane via the first and second ropes W1, W2 with the boom row BT in a lateral position, in this embodiment, the position of the first attachment part T1 relative to the boom support base BS is set so that the first rope W1 passes closer to the tip of the first boom B1 than the axis of the rotation shaft support part (pivot J1) of the boom support base BS relative to the first boom B1 in a side view. In this case, in the illustrated example of FIG. 15, the first rope W1 is connected to the first attachment part T1 on the tip side of the first boom B1 (the right side in FIG. 15), but it may also be connected to the first attachment part T1 on the opposite side (the left side in FIG. 15).

[0090] The above-mentioned installation position of the first mounting part T1 is determined from the viewpoint of effectively preventing the boom row BT from opening and swinging relative to the boom support base BS when the boom device 30 is hoisted in the above-mentioned horizontal position, as described below. However, if such an inhibitory effect is not important, the installation position of the first mounting part T1 relative to the boom support base BS may be set so that the first rope W1 passes outside the above-mentioned pivot support part (pivot J1) in a side view, i.e., on the left side in Figure 15.

[0091] Further, a third attachment part T3 is provided at the base of the first boom B1 for holding the second rope W2 on the first boom B1 in cooperation with the second attachment part T2 when not in use. The third attachment part T3 includes, for example, an upper support wall 49 with a support hole 48 protruding from the upper surface of the base of the first boom B1, and a connector 40 detachably connected to the upper support wall 49. The connector 40 also has the same structure as the connector 40 of the first attachment part T1 described above, that is, a U-shaped connecting hook 43 is rotatably supported via a mounting shaft 44 in a support hole provided in the upper support wall 49w. The connector 40 of the third attachment part T3 is also not limited to the embodiment, and for example, a variation not shown described for the first attachment part T1 can be adopted.

[0092] Furthermore, the third mounting part T3 can be omitted. In that case, the second rope W2, which is not required during concrete pouring work, can be removed from the second mounting part T2 (first boom B1), and the second rope W2 can be attached to the second mounting part T2 when assembling and dismantling the distributor D.

[0093] Next, with reference to Figures 17 and 18, an example of a boom device lifting auxiliary device that can be used when lifting the boom device 30 with a crane via multiple first ropes W1 when the boom row BT is in a vertical position using the concrete supply distributor D of this embodiment will be described.

[0094] That is, the auxiliary device includes a suspension rod 50, both ends of which are detachably connected to at least one pair of the first ropes W1 when the first ropes W1 are connected to all the first attachment parts T1 and the boom device 30 is hoisted by a crane in a vertical position via the first ropes W1 as shown in FIG. 17. The suspension rod 50 is formed as a rod-shaped body having a length greater than the maximum width of the boom row BT in a predetermined direction and has rigidity. The connection position of the suspension rod 50 to the first ropes W1 is set so that the suspension rod 50 can straddle the boom device 30 near the upper end of the boom device 30 in the vertical position. A pair of triangular support plates 55 are fixed (for example, welded) to both ends of the suspension rod 50, and a pair of support holes 56 are provided at an interval between the support plates 55.

[0095] The first rope W1 is divided into a first rope portion W1u above the suspension rod 50 and a second rope portion W1d below. The connected portions 51a of the first and second rope portions W1u and W1d are detachably connected to the corresponding support plates 55 via a pair of upper and lower connectors 40. The pair of upper and lower connectors 40 each have the same structure as the connector 40 of the first mounting part T1 described above, that is, a U-shaped connecting hook 43 is rotatably supported by a pair of support holes 56 of the support plate 55 via a mounting shaft 44. Therefore, the attachment and detachment operation of the connector 40 used for this suspension rod 50 is also the same as that of the connector 40 of the first mounting part T1.

[0096] The structure of the connector 40 used for the hanging rod 50 is also not limited to the embodiment, and for example, a variation (not shown) described for the first attachment portion T1 can be adopted.

[0097] Furthermore, when the boom device 30 is hoisted by a crane via a plurality of first cords W1 with the boom row BT in a vertical position as described above, the auxiliary device is provided with an annular support 60 that is detachably connected to at least two of the first cords W1 in the vertical direction between the lifting rod 50 and the first mounting portion T1 (at a position near the upper end of the boom device 30 in the illustrated example) and that surrounds all of the first cords W1 and the boom row BT.

[0098] The annular support 60 is intended to prevent the boom train BT from tilting by a predetermined angle or more with the first attachment part T1 as the tilting fulcrum when the boom device 30 is hoisted via the multiple first ropes W1 with the boom train BT in the vertical position. The annular support 60 is composed of a flexible and sturdy annular body (e.g., an endless wire rope, chain, etc.), and in the middle of the annular support 60, connecting members 61 fixed (e.g., by crimping, welding, bolting, etc.) to at least two of the first ropes W1 (parts close to the hanging rod 50) are detachably connected via connectors 40.

[0099] The connector 40 used to connect the annular support 60 has the same structure as the connector 40 of the first attachment part T1 described above, that is, a U-shaped connecting hook 43 is rotatably supported in a support hole 62 of a connecting member 61 via an attachment shaft 44. Therefore, the attachment and detachment operation of the connector 40 used to connect the annular support 60 is also similar to that of the connector 40 of the first attachment part T1. The structure of the connector 40 used for the annular support 60 is also not limited to the embodiment, and for example, a variation not shown described for the first attachment part T1 can be adopted.

[0100] Meanwhile, a grease pump Gi as a grease injection section, a distribution valve Vd connected to the grease pump Gi via a single grease base pipe GL0, and a plurality of grease pipes, i.e., the first to fourth grease pipes GL1 to GL4, connected in parallel to the grease base pipe GL0 (and therefore the grease pump Gi) via the distribution valve Vd, are fixed and supported on the fixed base 31 of the boom support base BS. The grease pump Gi is provided with, for example, a grease holding section capable of storing a predetermined amount of grease, and a grease pushing means such as a piston capable of manually pumping the stored grease in the grease holding section to the grease base pipe GL0, and the structure thereof is conventionally known. The distribution valve Vd distributes the grease flowing therein to the first to fourth grease pipes GL1 to GL4 in equal volumes, and the structure thereof is conventionally known.

[0101] The first to fourth grease pipes GL1 to GL4 are mostly flexible, and their midsections are bundled together and extend upward outside the fixed base 31, and then pass through the swivel base 32 and the base of the first boom B1. Of the first to fourth grease pipes GL1 to GL4 that extend from inside the base to the outside of the first boom B1, the first grease pipe GL1 in particular extends to the vicinity of the pivot J1 that serves as a rotational support for the first boom B1, and is capable of supplying grease to parts to be lubricated around the pivot J1 (for example, the fitting portion between the outer periphery of the pivot J1 and a bearing, and the fitting portion between the inner periphery of the pivot J1 and the second relay pipe 39).

[0102] The second to fourth grease pipes GL2 to GL4 protruding from the first boom B1 are fixed along the first boom B1 and extend to the tip of the first boom B1. At the tip of the first boom B1, the second grease pipe GL2 of the second to fourth grease pipes GL2 to GL4 extends to the vicinity of the pivot J2 which is the pivotal joint of the first and second booms B1 and B2, and can supply grease to parts to be lubricated around the pivot J2 (for example, the fitting portion between the outer periphery of the pivot J2 and the bearing, and the fitting portion between the inner periphery of the pivot J2 and the second relay pipe 39). Meanwhile, the third and fourth grease pipes GL3 and GL4 are fixed along the second boom B2 and extend to the tip of the second boom B2.

[0103] At the tip of the second boom B2, the third grease pipe GL3 of the third and fourth grease pipes GL3, GL4 in particular extends to the vicinity of the pivot J3 which is the pivotal connection part of the second and third booms B2, B3 and can supply grease to parts to be lubricated around the pivot J3 (for example, the fitting part between the outer periphery of the pivot J3 and the bearing, and the fitting part between the inner periphery of the pivot J3 and the second relay pipe 39).On the other hand, the fourth grease pipe GL4 is fixed along the third boom B3 and extends to the tip of the third boom B3.

[0104] Furthermore, at the tip of the third boom B3, the fourth grease piping GL4 extends to the vicinity of the pivot J4, which is the pivotal connection part of the third and fourth booms B3, B4, and is capable of supplying grease to lubricated parts around the pivot J4 (for example, the fitting part between the outer periphery of the pivot J4 and the bearing, and the fitting part between the inner periphery of the pivot J4 and the second relay pipe 39).

[0105] Thus, the first to fourth GL1 to GL4 extend to the respective lubricated parts of the plurality of booms B1 to B4 of the boom train BT and supply grease to those lubricated parts.

[0106] As is clear from Fig. 12 and Fig. 21, the first to fourth backup pipes GE1 to GE4 are individually branched from the middle of the first to fourth grease pipes GL1 to GL4. The backup pipes GE1 to GE4 have grease injection ports GEi1 to GEi4 as backup grease injection parts that can individually inject grease into the corresponding backup pipes GE1 to GE4. Each of the grease injection ports GEi1 to GEi4 is provided with a manual plug that normally closes it, and each plug can open and close the grease injection ports GEi1 to GEi4 at any time. In addition, the first to fourth grease pipes GL1 to GL4 are provided with a check valve Vc between the branching part of the grease pipes GL1 to GL4 where the backup pipes GE1 to GE4 branch off and the distribution valve Vd to prevent grease from flowing back from the grease pipes GL1 to GL4 to the distribution valve Vd.

[0107] 21, a backup pipe GE0 for grease supply may be branched off from the grease base pipe GL0 (between the check valve Vc and the distributing valve Vd), and a manually opened and closed plug that is normally closed is attached to the backup pipe GE0. By using this backup pipe GE0, grease can be supplied to the grease base pipe GL0 even when the grease pump Gi breaks down.

[0108] In the grease supply system described above, the backup system (backup pipes GE0, GE1 to GE4 and check valve Vc) may be omitted.

[0109] According to the above-described grease supply structure of this embodiment, grease can be simultaneously supplied to the multiple grease pipes GL1 to GL4 from a single common grease pump Gi via a distribution valve Vd. This allows grease to be quickly and easily supplied to the lubricated parts of the multiple booms B1 to B4 in the boom train BT even when the boom train BT is still attached to the boom support base BS (i.e., without lowering the booms B1 to B4), thereby shortening the work time and reducing the number of work steps required for grease supply. Furthermore, since grease supply is thus facilitated, it is possible to effectively avoid a situation in which the booms are left without being greased, which is also effective in preventing failures and a decrease in durability of the boom device 30.

[0110] Furthermore, a check valve Vc that prevents grease from flowing back toward the distribution valve Vd is provided in the grease pipes GL1 to GL4 between the branching point where the backup pipes GE1 to GE4 branch off and the distribution valve Vd. This makes it possible to reliably prevent a situation in which, when grease is replenished from the backup pipes GE1 to GE4 due to a failure of the distribution valve Vd, the replenished grease flows back toward the distribution valve Vd and fails to reach the lubricated parts of the booms B1 to B4.

[0111] Next, the operation of the embodiment will be described with reference to FIGS.

[0112] When the distributor D of this embodiment is used at a building construction site, for example, a reinforced concrete floor slab FS1 of the lowest floor (for example, the first floor) is constructed in advance, and the floor slab FS1 has through holes H that connect the spaces above and below it. Then, an assembly process of assembling and installing the distributor D on the floor slab FS1 and a process of constructing the upper floor slab and associated walls based on the pouring of ready mixed concrete using the installed distributor D are sequentially performed.

[0113] Once the upper floor slabs FS2, FS3, etc. have been constructed in this manner, a process is carried out in which the distributor D as a whole is placed on the upper floor slab in order to construct the upper floor slabs, etc. (This process is called "re-laying" on-site.) The above-mentioned distributor D assembly process and re-laying process will now be described in order. [Assembly process] First, as illustrated in Figure 14(A), the base device 10 of the distributor D is suspended by a crane and lowered to approximately the same level as the floor slab FS1, and the outrigger 16 in the deployed position 16A is placed on the floor slab FS1 and fixed with a conventional fixing means (for example, an anchor bolt that passes through the outrigger 16).

[0114] Next, as shown in Figure 14 (B), the mast device 20, which has been assembled in advance at another location including the ladder 23, connecting pipes 28 and work platform 24 together with one or more masts M, is suspended by a crane, placed on the base device 10 (on the square tube portion 11b of the base frame 11), and connected to the base device 10 via connecting blocks 21, 21' and bolts 25.

[0115] Next, as shown in Fig. 14(C), the boom device 30, which has been assembled in advance as an assembly of the boom train BT and the boom support base BS at a different location, is folded up and placed in a substantially horizontal lateral position, and the connected parts 51a at the lower ends of the first and second ropes W1, W2 are respectively connected to the fixed base 31 and the first and second mounting parts T1, T2 on the first boom B1. Then, the upper parts of the first and second ropes W1, W2 are lifted up by a crane and placed on the upper end of the uppermost mast M of the mast device 20 as shown in Fig. 14(D), and connected to the uppermost mast M via the connecting blocks 21, 21' and bolts 25. This connecting work is performed by a worker who has climbed onto the work platform 24 in cooperation with the crane operator.

[0116] Thereafter, the first rope W1 is removed from the crane hook 80 and the first mounting part T1 and stored in another storage location. The upper end of the second rope W2 is removed from the crane and attached to the third mounting part T3, and the lower end is left connected to the second mounting part T2.

[0117] Furthermore, the downstream end (upper end) of the connection pipe 28 fixed to the mast M is liquid-tightly connected to the upstream end (lower end) of the first relay pipe 38 on the fixed base 31 side via a joint, and this connection work is also performed by a worker on the workbench 24. Meanwhile, the upstream end (lower end) of the connection pipe 28 is liquid-tightly connected via a joint to a concrete pressure pipe extending from an external concrete pump (not shown). This makes it possible to pressure-feed and supply ready-mixed concrete from the concrete pump to the connection pipe 28, the first and second relay pipes 38, 39, and the blow-out tube 37 in that order.

[0118] Thus, the installation of the distributor D on the floor slab FS1 of the lowest level is completed, and from this state, the distributor D can supply ready mixed concrete to a desired casting location from the blow-out tube 37 at the end of the boom train BT by appropriately bending the booms B1 to B4 of the boom train BT relative to each other and rotating the swivel base 32 (and therefore the boom train BT). This makes it possible to sequentially build the floor slab FS2 and wall of the next level, and further the floor slab FS3 and wall of the next level.

[0119] Once the upper floor slabs FS2, FS3 and wall bodies have been built in this manner, the next re-laying process is performed in which the entire distributor D is re-placed, for example, on the floor slab FS2 in order to build the upper floor slab FS4, etc. [Refilling process] In this step, for example, the connection pipe 28 fixed to the mast M is disconnected from the concrete pump-connected concrete pumping pipe, and the outriggers 16 are released from their fixing to the floor slab FS1. Then, as shown in Fig. 16(E), the folded boom row BT is raised and swung up until it is in a substantially vertical position, and in this state, the connected parts 51a at the lower ends of the four first ropes W1 are respectively connected to the four first mounting parts T1 of the boom support base BS (fixed base 31). Then, the connected parts 51a at the upper ends of the first ropes W1 are engaged with the crane hook 80, and the entire distributor D is lifted up by a crane.

[0120] 16(F), the outriggers 16 are rotated to the storage position 16B so that the outriggers 16 do not interfere with the periphery of the through-hole H of the floor slab FS2 of the upper floor when the distributor D is raised. Then, the entire distributor D is hoisted and raised by a crane until the base device 10 is at approximately the same level as the floor slab FS2 of the upper floor.

[0121] After the ascent, as shown in FIG. 16(G), the outriggers 16 are deployed again to the deployment position 16A, and then placed and fixed on the floor slab FS2 of the upper floor. Next, the lower ends of all the first ropes W1 are removed from the first mounting parts T1 of the fixing base 31 and stored in another storage location. The upper end of the extension pipe 28' extending downward is connected and fixed to the upstream end (lower end) of the connection pipe 28 fixed to the mast M, and the middle of the extension pipe 28' is supported by a beam or the like around the through hole H of the floor slab (for example, the floor slab FS2) of the lower floor via a fixing means 81. Then, by connecting the lower end of the extension pipe 28' to a concrete pressure pipe connected to the concrete pump, it becomes possible to pressure-feed and supply ready-mixed concrete to the connection pipe 28, the first and second relay pipes 38, 39, and the blow-out tube 37 in that order.

[0122] Thus, the distributor D's work of transferring concrete to the upper floor is completed, and from this state, the distributor D lays down the first boom B1 of the boom train BT, bends the booms B1 to B4 relative to each other as appropriate, and rotates the swivel base 32 (and therefore the boom train BT), so that ready-mixed concrete can be supplied from the blow-out tube 37 at the end of the boom train BT to a desired casting location on the upper floor. This makes it possible to construct the floor slab FS4 and walls of the upper floor.

[0123] By carrying out the above-mentioned replacement process in sequence as the floor slab FS increases in level, it becomes possible to easily construct medium-rise and high-rise buildings using the same distributor D.

[0124] According to the present embodiment described above, the first attachment portion T1, which is used when lifting the boom device 30 via the first ropes W1 with a crane while the folded boom row BT is in a horizontal or vertical position and can be connected to the first ropes W1, is provided on the boom support base BS (fixed base 31 in the illustrated example), so that the boom device 30 can be lifted via the first ropes W1 with a crane in the state where the boom row BT and the boom support base BS are assembled together. This eliminates the need to assemble the boom device 30 on a high mast device 20 as in the conventional case, and accordingly improves the ease of assembly of the boom device 30.

[0125] In particular, during so-called rearrangement work in which the boom device 30 is lifted with the boom train BT in the vertical position, the entire boom device 30 is lifted, particularly at the boom support base BS, via the multiple first mounting parts T1 and multiple first ropes W1 of the boom support base BS, so the load on the connection between the base end of the boom train BT (base of the first boom B1) and the boom support base BS during the lifting can be effectively reduced compared to the conventional case of lifting with the boom train BT. This simplifies the structure of the connection and ultimately reduces costs.

[0126] Moreover, the boom support base BS in this embodiment includes a fixed base 31 fixed to the upper part of the mast assembly 20, and a swivel base 32 rotatably supported about a swivel axis J5 on the fixed base 31, which supports the base of the first boom B1 so that it can be raised and lowered, and the first mounting part T1 is provided on the fixed base 31. As a result, since the fixed base 31 of the boom support base BS in particular is lifted by the first ropes W1, the load on the swivel mechanism (i.e., the swivel axis J5, swivel bearing 31b, etc.) rotatably supporting the fixed base 31 on the swivel base 32 is reduced compared to the case where the swivel base 32 is lifted by the first ropes W1, which accordingly simplifies the structure of the swivel mechanism and thereby reduces costs.

[0127] In the embodiment, a second attachment part T2 that is used when lifting the boom device 30 by a crane via the second rope W2 with the boom train BT in a particularly horizontal position and that can be connected to the second rope W2 is provided midway on the first boom B1. This makes it possible to lift the boom device 30 by a crane via the first and second ropes W1, W2 (thus with a long support span in the horizontal direction) with the boom train BT in a horizontal position, thereby stabilizing the lifting support and improving workability.

[0128] Furthermore, in the embodiment, when the boom device 30 is hoisted by a crane via the first and second ropes W1, W2 with the boom train BT in a lateral position, the position of the first attachment part T1 relative to the boom support base BS is set so that the first rope W1 passes through the tip side of the first boom B1 relative to the axis of the rotation shaft support part (i.e., the pivot J1) of the boom support base BS relative to the first boom B1 in a side view. As a result, during the process of hoisting the boom device 30 with the boom train BT in a lateral position, the boom train BT can be effectively prevented from opening and swinging relative to the boom support base BS by the moment that the lifting load applied to the boom support base BS by the first rope W1 via the first attachment part T1 exerts on the boom support base BS, and therefore the simple opening suppression structure utilizing the lifting load improves the safety of the work.

[0129] Also, a third attachment part T3 is provided at the base of the first boom B1 for holding the second cord W2 on the first boom B1 in cooperation with the second attachment part T2 when not in use. As a result, even if one end of the second cord W2 remains connected to the second attachment part T2 when not in use, the other end of the second cord W2 can be connected and held to the third attachment part T3, so that the second cord can be held on the first boom while preventing the second cord from interfering with the concrete pouring work. Moreover, the next time the second cord W2 is used, the effort of connecting one end of the second cord W2 to the second attachment part T2 is eliminated, which improves work efficiency.

[0130] In particular, in order to carry out the rearrangement work, when the boom train BT is in the vertical position and the first ropes W1 are connected to all of the first mounting parts T1 and the boom device 30 in the vertical position is hoisted by a crane via the first ropes W1, it is desirable to connect both ends of a suspension rod 50 that is longer than the maximum width of the boom train BT in the width direction to the middle of a pair of first ropes W1 aligned in the width direction of the boom train BT (particularly above the upper end of the boom train BT). In this case, the pair of first ropes W1 with both ends of the suspension rod 50 connected in the middle are subjected to the tensioning action of the suspension rod 50 interposed between the first ropes W1, thereby reliably preventing excessive interference of the first ropes W1 with the boom train BT.

[0131] Furthermore, when the boom device 30 in the vertical position is hoisted by a crane via the first ropes W1 for the above-mentioned repositioning work, it is desirable to connect an annular support 60 surrounding all of the first ropes W1 and the boom train BT to the middle of at least one of the first ropes W1 (particularly the portion close to the hoisting rod 50) between the hoisting rod 50 and the first mounting part T1 in the vertical direction. In this case, the annular support 60 can suppress the boom train BT from tilting excessively (i.e., more than a predetermined angle) with the first mounting part T1 as the tilting fulcrum, so that it is possible to effectively prevent the boom train BT from tilting too much and falling over when the boom device 30 is hoisted.

[0132] When the boom device 30 in the vertical position described above is hoisted by a crane, both the hoist rod 50 and the annular support 60 may be omitted. It is also possible to use only the hoist rod 50 without using the annular support 60. It is also possible to use only the annular support 60 without using the hoist rod 50. In this case, it is possible to hoist the boom device 30 in the vertical position with only one first rope W1 via one first mounting portion T1 on the boom support base BS side, and at that time, it is possible to prevent the boom device 30 from falling over with the annular support 60 connected to the first rope W1.

[0133] In addition, in carrying out the [Reloading Process], in the embodiment, the boom device 30 in the vertical position is hoisted by a crane via the first rope W1 as shown in Fig. 16. However, even if the boom device 30 is hoisted via the first and second ropes W1 and W2 while remaining in the horizontal position, the reloading work may be carried out with the boom device 30 in the horizontal position, provided that the boom device 30 does not interfere with the already constructed structure (e.g., the floor slab of the upper layer, etc.).

[0134] Although the embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and various embodiments can be implemented within the scope of the present invention.

[0135] For example, in the embodiment, the mast assembly 20 is formed of two masts M arranged in a vertical line and connected to each other, and the boom assembly 30 is replaced together with the mast assembly 20 and the base assembly 10. However, depending on the length of the mast M and the work conditions at the site, the mast assembly 20 may be formed of a single mast M, or the mast assembly 20 may be formed by connecting three or more masts M in a vertical line.

[0136] In the above embodiment, the connecting blocks 21, 21' fixed to the outer peripheries of adjacent ends of adjacent masts M at intervals in the circumferential direction are vertically adjacent to each other, facing and abutting in the vertical direction, and their abutting surfaces are connected to each other with bolts 25, but other connecting means (for example, welding, caulking, pinning, etc.) other than bolts can be used as the connecting means. Also, the connecting blocks 21, 21' may be adjacent to each other in the circumferential direction of the mast M, facing and abutting in the circumferential direction, and their abutting surfaces may be connected to each other with bolts 25 or other connecting means, and in this case, a horizontal (i.e., circumferentially facing) bolt or fixing pin is used as the bolt or fixing pin that connects the abutting surfaces to each other.

[0137] Also, in the embodiment, the deployed position 16A of the outrigger 16 in the base device 10 can be set to any of the three deployed positions 16A0, 16A1, 16A2, but the deployed position 16A of the outrigger 16 may be one pattern, or two patterns, or four or more patterns. Note that when the deployed position 16A is set to one or two patterns, which is fewer than the three patterns of the embodiment, the number of pin insertion holes provided on the base side of the outrigger 16 can be less than that of the embodiment (i.e., one or two).

[0138] In addition, in the above embodiment, an example was given of the outriggers 16 being rotated manually between the storage position 16B and the deployment position 16A, but the outriggers 16 may also be rotated automatically by an actuator (not shown) provided between the outriggers 16 and the base main body 10m.

[0139] In addition, in the above embodiment, the boom train BT in the boom device 30 is shown as being composed of first to fourth booms B1 to B4 arranged in series and capable of bending and swinging relative to each other, but the boom train BT only needs to connect at least two booms and is not limited to the number of booms in the embodiment.

[0140] In addition, in the above embodiment, no length adjustment auxiliary device such as a conventionally known chain block is used for the first and second ropes W1, W2, but such a length adjustment auxiliary device may be used to connect at least a portion of the first and second ropes W1, W2 to at least a portion of the first and second mounting portions T1, T2 while making the length adjustable.

[0141] In addition, in the above embodiment, the upper and lower frames 12, 13 are connected to the base frame 11 via the surrounding frames 14k, 15k of the upper and lower bearings 14, 15, but the upper and lower frames 12, 13 may be directly connected to the base frame 11, or may be connected via other members that are separate and independent of the surrounding frames 14k, 15k.

[0142] In addition, in the above embodiment, the upper and lower bearings 14, 15 are composed of bearing bodies 14b, 15b and surrounding frames 14k, 15k connected thereto, and the bearing bodies 14b, 15b are connected to the upper and lower frames 12, 13 via the surrounding frames 14k, 15k. However, the surrounding frames 14k, 15k may be omitted, and the upper and lower frames 12, 13 may be directly connected (i.e., without via the surrounding frames 14k, 15k) to mounting surfaces provided on the outer sides of the bearing bodies 14b, 15b.

[0143] In the above embodiment, in the [assembly process] of the distributor D, after the base device 10 and the mast device 20 are installed on site as shown in Figures 14(A) to (D), the boom row BT (in this embodiment, the first boom B1) of the boom device 30 with the boom row BT in a horizontal position and the boom rotating base BS (in this embodiment, the fixed base 31) are suspended by a crane via the first and second ropes W1, W2 and the first and second mounting parts T1, T2, and the fixed base 31 is connected to the uppermost mast M in this suspended state. In contrast to this, in the [assembly process] of the distributor D, as shown in the flow from Figure 14(A)(B) to Figure 19(C')(D'), after the base device 10 and the mast device 20 are installed on site, the fixed base 31 of the boom device 30 with the boom row BT in the vertical position can be suspended by a crane via the four first ropes W1 and the first mounting part T1, and the fixed base 31 can be connected to the uppermost mast M in this suspended state.

[0144] In the above embodiment, in the "assembly process" of the distributor D, as shown in Figures 14(A) to (D), the base device 10 is first installed on the floor slab FS1 of the lowest level (e.g., basement or first floor) of the site, and then the mast device 20 is constructed and the boom device 30 is assembled above it. However, prior to the "assembly process" of the distributor D (i.e., without using the distributor D), a lower level slightly above the lowest level (e.g., floor slab FS2 or FS3 in the embodiment) may also be constructed, and then the base device 10 may be first installed on the upper floor slab FS2 or FS3 to start the "assembly process".

[0145] In addition, in the base body 10m of the base device 10 of the above embodiment, as shown simply in Figures 20(A) and (B), the upper bearings 14 are connected to the adjacent ends of adjacent upper frames 12 so that at least a portion of the upper bearings 14 is located inward of the intersection O of the extension lines of the outer surfaces of adjacent upper frames 12 along the longitudinal direction in a planar view, and the lower bearings 15 are connected to the adjacent ends of adjacent lower frames 13 so that at least a portion of the lower bearings 15 is located inward of the intersection O of the extension lines of the outer surfaces of adjacent lower frames 13 along the longitudinal direction in a planar view. In contrast to this, as another embodiment of the present invention, as simply shown in Figures 20(C) and (D), a structure in which the upper bearings 14 are each connected to the adjacent ends of adjacent upper frames 12 so that at least a portion of the upper bearings 14 are located inward of the intersection O' between the outer sides of adjacent upper frames 12 running along the longitudinal direction in a planar view (i.e., toward the square tube portion 11b, in other words, toward the center of the base main body 10m), and a structure in which the lower bearings 15 are each connected to the adjacent ends of adjacent lower frames 13 so that at least a portion of the lower bearings 15 are located inward of the intersection O' between the outer sides of adjacent lower frames 13 running along the longitudinal direction in a planar view (i.e., toward the square tube portion 11b, in other words, toward the center of the base main body 10m).

[0146] In this alternative embodiment, for example, adjacent ends of adjacent upper frames 12 are directly fixed to each other (e.g., welded, bolted, etc.), and the upper part of the upper bearing 14 is fixed (e.g., welded, bolted, etc.) to the lower surface of the adjacent end of the upper frame 12. Also, adjacent ends of adjacent lower frames 13 are directly fixed to each other (e.g., welded, bolted, etc.), and the upper part of the lower bearing 15 is fixed (e.g., welded, bolted, etc.) to the upper surface of the adjacent end of the lower frame 13.

[0147] Incidentally, in the base device 10 of this other embodiment as well, it is possible to achieve basically the same effects as those of the base device 10 of the above-described embodiment. [Explanation of symbols]

[0148] D... Distributor P1, P2... Connection pins 10. Base device 10m...Base body 10h0: First pin insertion hole on the base body side 10h1, 10h2: Second pin insertion hole on the base body side 16. Outrigger 16A, 16B: Deployed position, stowed position 16a, 16b Tip and base of outrigger 16h0 Pin insertion hole on the front side of the outrigger 16h1~16h3 Pin insertion hole on the base side of the outrigger 16f...Extension part 16m...Outrigger body 17...Rotation support shaft 20 Mast device 30. Boom device

Claims

1. A concrete supply distributor comprising a base device (10), a mast device (20) supported in an upright position on the base device (10), and a boom device (30) mounted on the mast device (20), the base device (10) having a base body (10m) and outriggers (16) whose base parts (16b) are rotatably supported on the base body (10m) via pivot shafts (17), the outriggers (16) being rotatable between a stored position (16B) close to the base body (10m) and a deployed position (16A) projecting outward from the stored position (16B), pin insertion holes (16h0-16h3, 10h0-10h2) into which coupling pins (P1, P2) capable of fixing the outrigger (16) to the base main body (10m) when the outrigger (16) is in either the deployed position (16A) or the stored position (16B) are inserted in a removable manner for the fixing, and the outriggers (16) and the base main body (10m) are each provided with pin insertion holes (16h0-16h3, 10h0-10h2); A distributor for supplying concrete, characterized in that the outrigger (16) has a plurality of pin insertion holes (16h0 to 16h3).

2. A concrete supply distributor comprising a base device (10), a mast device (20) supported in an upright position on the base device (10), and a boom device (30) mounted on the mast device (20), the base device (10) having a base body (10m) and outriggers (16) whose base parts (16b) are rotatably supported on the base body (10m) via pivot shafts (17), the outriggers (16) being rotatable between a stored position (16B) close to the base body (10m) and a deployed position (16A) projecting outward from the stored position (16B), pin insertion holes (16h0-16h3, 10h0-10h2) into which coupling pins (P1, P2) capable of fixing the outrigger (16) to the base main body (10m) when the outrigger (16) is in either the deployed position (16A) or the stored position (16B) are inserted in a removable manner for the fixing, and the outriggers (16) and the base main body (10m) are each provided with pin insertion holes (16h0-16h3, 10h0-10h2); A distributor for supplying concrete, characterized in that the outriggers (16) are multiple, and the pin insertion holes (16h0 to 16h3) provided in the base body (10m) corresponding to each outrigger (16) are multiple.

3. A concrete supply distributor comprising a base device (10), a mast device (20) supported in an upright position on the base device (10), and a boom device (30) mounted on the mast device (20), wherein the base device (10) has a base body (10m) and outriggers (16) whose bases (16b) are rotatably supported on the base body (10m) via pivot shafts (17), the outriggers (16) being rotatable between a stored position (16B) close to the base body (10m) and an deployed position (16A) extending outward from the stored position (16B), pin insertion holes (16h0-16h3, 10h0-10h2) into which connecting pins (P1, P2) capable of fixing the outriggers (16) to the base body (10m) when the outriggers (16) are at least in the deployed position (16A) are inserted in a removable manner for the fixing, and The outrigger (16) has the pin insertion holes (16h0, 16h1 to 16h3) on the outrigger (16) side at its tip portion (16a) and base portion (16b), The base main body (10m) has a first pin insertion hole (10h0) on the base main body (10m) side for cooperating with a pin insertion hole (16h0) on the tip (16a) side of the outrigger (16) to fix the outrigger (16) at the stored position (16B), and a plurality of second pin insertion holes (10h1, 10h2) on the base main body (10m) side for cooperating with pin insertion holes (16h1 to 16h3) on the base (16b) side of the outrigger (16) to fix the outrigger (16) at the deployed position (16A), A distributor for supplying concrete, characterized in that some of the plurality of second pin insertion holes (10h1, 10h2) can be inserted into the connecting pin (P1, P2) together with one of the pin insertion holes (16h1-16h3) on the base (16b) side of the outrigger (16), thereby fixing the outrigger (16) in the storage position (16B).

4. A concrete supply distributor comprising a base device (10), a mast device (20) supported in an upright position on the base device (10), and a boom device (30) mounted on the mast device (20), wherein the base device (10) has a base body (10m) and outriggers (16) whose bases (16b) are rotatably supported on the base body (10m) via pivot shafts (17), the outriggers (16) being rotatable between a stored position (16B) close to the base body (10m) and an deployed position (16A) extending outward from the stored position (16B), pin insertion holes (16h0-16h3, 10h0-10h2) into which connecting pins (P1, P2) capable of fixing the outriggers (16) to the base body (10m) when the outriggers (16) are at least in the deployed position (16A) are inserted in a removable manner for the fixing, and The outrigger (16) has the pin insertion holes (16h0, 16h1 to 16h3) on the outrigger (16) side at its tip portion (16a) and base portion (16b), The base main body (10m) has a first pin insertion hole (10h0) on the base main body (10m) side for cooperating with a pin insertion hole (16h0) on the tip (16a) side of the outrigger (16) to fix the outrigger (16) at the stored position (16B), and second pin insertion holes (10h1, 10h2) on the base main body (10m) side for cooperating with pin insertion holes (16h1 to 16h3) on the base (16b) side of the outrigger (16) to fix the outrigger (16) at the deployed position (16A), A distributor for supplying concrete, characterized in that the inner diameters of the first pin insertion hole (10h0) and the second pin insertion hole (10h1, 10h2) are the same, and the connecting pin (P1) that is inserted into the second pin insertion hole (10h1, 10h2) when the outrigger (16) is deployed is inserted into the first pin insertion hole (10h0) when the outrigger (16) is stored to fix the outrigger (16) in the stored position (16B).

5. A concrete supply distributor as described in any one of claims 1 to 4, characterized in that the outrigger (16) has an outrigger body (16m) and an extension portion (161f, 162f) fixed to the outrigger body (16m) and extending outward from the outer surface of the outrigger body (16m), and the pin insertion holes (16h1 to 16h3) on the outrigger (16) side are provided in the extension portion (161f, 162f).

6. Each of the outriggers (16) has the pin insertion holes (16h0, 16h1 to 16h3) on the outrigger (16) side at its tip portion (16a) and base portion (16b), The base main body (10m) has a first pin insertion hole (10h0) on the base main body (10m) side for cooperating with a pin insertion hole (16h0) on the tip (16a) side of the outrigger (16) to fix the outrigger (16) at the stored position (16B), and second pin insertion holes (10h1, 10h2) on the base main body (10m) side for cooperating with pin insertion holes (16h1 to 16h3) on the base (16b) side of the outrigger (16) to fix the outrigger (16) at the deployed position (16A), A concrete supply distributor as described in claim 2, characterized in that the inner diameters of the first pin insertion hole (10h0) and the second pin insertion holes (10h1, 10h2) are the same, and the connecting pin (P1) inserted into the second pin insertion hole (10h1, 10h2) when the outrigger (16) is deployed is inserted into the first pin insertion hole (10h0) when the outrigger (16) is stored to fix the outrigger (16) in the stored position (16B).

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