JP6761770B2 - Lifting device - Google Patents

Description

The present invention relates to a lifting device applied to a multi-story building under construction.

Conventionally, a lifting device for transporting a load made of building materials or the like from a lower floor to an upper floor has been proposed for the construction of a building having a plurality of floors. This lifting device includes a three-dimensional frame arranged in a stairwell of a building and an elevating stage arranged so as to be able to elevate in the three-dimensional frame (see Patent Document 1 below). According to this, the load loaded on the elevating stage on the lower floor can be transported to the upper floor through the three-dimensional frame.

By the way, in the conventional lifting device, when the load is transported from the lower floor to the upper floor a plurality of times, the empty elevating stage after the load is carried descends from the upper floor. It is necessary to wait for the arrival on the lower floor, which is a factor that hinders the rapid transportation of the load to the upper floor.

JP-A-2007-46360

An object of the present invention is to provide a lifting device that contributes to improving the efficiency of transporting a load from a lower floor to an upper floor of a multi-story building under construction in view of the above-mentioned conventional circumstances.

The present invention relates to a lifting device applied to a building having a plurality of floors under construction. The lifting device is installed on the lower floor of the building with a pair of head pulleys that are rotatably supported independently of each other on a first stand installed on the upper floor of the building. A pair of tail pulleys rotatably supported by a second stand, a pair of endless cords hung on both head pulleys and both tail pulleys, and a plurality of crosspieces attached parallel to each other. A carrier that is passed through a temporary opening provided on each floor of the building, and a plurality of receiving stands that can be hooked on an arbitrary crosspiece of the carrier, and both head pulleys. It has a size that allows it to pass through the space and the temporary opening.

According to the present invention, it is hung on a pair of head pulleys supported by a first stand installed on the upper floor of a building and a pair of tail pulleys supported by a second stand installed on the lower floor. , By rotating both cords of the carrier that extend in a ring shape through the temporary openings on each floor, a plurality of consignments hooked on any pier of the carrier can be moved from the lower floor to the upper floor. Also, it can be circulated from the upper floor to the lower floor. The rotation of both cords of the carrier can be performed by rotationally driving both head pulleys. As a result, the load consisting of the formwork, the support work, the building material, and the like can be transported in a relatively short time and in a relatively large amount, and therefore more efficiently, through the plurality of receiving stands. Further, in the present invention, since both head pulleys spaced apart from each other are independently supported and the load receiving table can pass between the head pulleys, the crosspiece of the carrier. The cradle that circulates and moves while being hooked on the cradle swings with respect to the stile when it changes from ascending to descending, and passes between both head pulleys while maintaining a posture.

The lifting device may further include a drive mechanism for rotationally driving both head pulleys, which is supported by the first stand.

The lifting device may further include a retractor provided on the first stand for temporarily accommodating a part of the transporter removed from both tail pulleys. According to this, for example, by rotationally driving both head pulleys, the transport tool can be pulled up, and a part of the transport tool can be pulled up and stored in the retractor.

The first stand may have a plurality of wheels. According to this, the first stand can be moved to a higher floor in a state where the carrier is hung on both head pulleys and a part thereof is stored in the retractor.

Further, the load receiving table includes a back plate, a pair of hooks attached to the back plate at intervals, a load receiving plate pivotally attached to the back plate, and a pair pivoted to the back plate. A pair of rods that are vertically movable and supported by the back plate and that can come into contact with the crosspieces of the carrier can be provided. According to this, the loading platform can be hooked on the crosspiece of the carrier at both hooks. Further, in the receiving table, the receiving plate and both side plates can be folded with respect to the back plate to form the receiving table in a flat shape. As a result, the ratio of the thickness to the temporary opening of each floor through which the empty cradle that descends from the upper floor to the lower floor passes is smaller, and the ratio is raised from the lower floor to the upper floor. The proportion of thickness occupied by the cradle can be made larger. As a result, the loading capacity of the load on the receiving platform can be increased. The pair of rods prevents the loading platform loaded with the load from swinging with respect to the crosspiece of the carrier, and functions to stabilize the posture of the receiving platform.

It is a schematic front view of a lifting device applied to a building under construction. However, the illustration of the loading platform constituting the lifting device is omitted. It is a schematic vertical sectional view of a building and a lifting device. It is a perspective view which shows the 1st stand and the head pulley of a lifting device installed on the upper floor of a building under construction. It is a perspective view which shows the 1st stand, a head pulley, a part of a carrier, and a loading platform on the upper floor of a lifting device. FIG. 5 is a perspective view schematically showing a second stand of a lifting device, a tail pulley, a part of a carrier, and a loading platform, which are installed on the lower floor of a building under construction. It is a side view which shows a part of the 2nd stand. It is a schematic perspective view which shows the cradle ascending and cradle falling between the upper floor and the lower floor of the building under construction. It is a perspective view of a consignment stand. It is a perspective view of the consignment stand in a folded state. It is a perspective view of the 1st stand provided with the accommodating tool.

With reference to FIGS. 1 and 2, the lifting device according to the embodiment of the present invention applied to the building 10 under construction is indicated by reference numeral 12 as a whole.

The building 10 has a plurality of floors 14, or more precisely, a plurality of floor slabs each defining a plurality of floors. Hereinafter, the floor slab may be designated by reference numeral 14 as necessary. Temporary openings 16 are provided in the floor slabs on each floor 14. The illustrated opening 16 has a rectangular shape and has a pair of long edges and a pair of short edges extending along a pair of long sides and a pair of short sides, which are the four sides of the rectangle, respectively.

The lifting device 12 includes a pair of head pulleys 20 rotatably supported by a first stand 18 installed on the upper floor of the building 10 (referred to by reference numeral 14a for convenience), and a lower floor (referred to by reference numeral 14a). For convenience, it includes a pair of tail pulleys 24 rotatably supported by a second stand 22 installed at reference numeral 14b), a carrier 26, and a plurality of cradle 28s (FIG. 2). The carrier 26 extends vertically through the opening 16 of the upper floor 14a and the opening 16 of one or a plurality of other floors 14 between the upper and lower floors 14a and 14b. A load (not shown) consisting of a formwork used for constructing the building 10, a support for supporting the formwork, building materials, etc. is loaded on the loading platform 28 on the lower floor 14a, and the load is loaded. The received load receiving table 28 is transported to the upper floor 14a through the opening 16 of each floor 14 via the transport tool 26.

As shown in FIGS. 3 and 4, the first stand 18 has a pair of legs 30 that are spaced apart from each other and face each other, and both legs 30 are connected to each other via a connecting member 32. In the figure, both legs 30 are placed on the floor slab 14a on the upper floor and are located on the sides of both short edges of the opening 16, and the connecting member 32 is located on one side of both long edges of the opening 16. Located on the side.

The pair of head pulleys 20 are arranged between the pair of legs 30 at intervals from each other, and are independently rotatably supported by both legs 30 at the upper end portions 30a thereof. Therefore, there is a gap or space between the two head pulleys 20. In the illustrated example, each head pulley 20 is composed of a two-stage pulley, and has a first-stage large-diameter pulley 20a and a second-stage small-diameter pulley 20b (FIG. 3).

The first stand 18 preferably includes a drive mechanism 34 for rotationally driving both head pulleys 20. The illustrated drive mechanism 34 is rotatably supported by the upper ends 30a of both legs 30 of the first stand 18 and is arranged at a distance from each other between the shaft 36 penetrating the upper ends 30a and the upper ends 30a. A pair of pulleys 38 fixed to the shaft 36, a pulley 40 fixed to the end of the shaft 36 protruding through the upper end 30a of one leg 30 (left in the figure), and the left side. It has an electric motor 42 supported by legs 30 and a pulley 44 fixed to a rotating shaft of the electric motor. These shafts 36 and pulleys 38 and 40 are located above both head pulleys 20.

The drive mechanism 34 further includes a pair of transmission belts 46 and one transmission belt 48. Each transmission belt 46 is hung on a small diameter pulley 20b of each head pulley 20 and each pulley 38 fixed to a shaft 36, and one transmission belt 48 is hung on the pulley 40 and the pulley 44. According to the drive mechanism 34, the rotational power of the electric motor 42 is transmitted from the pulley 44 to the pulley 40 via the transmission belt 48, and further, the pulley 40 is fixed to the shaft 36 and both pulleys 38 fixed to the shaft. Be transmitted. Next, the rotational power of both pulleys 38 is transmitted to the small-diameter pulleys 20b of both head pulleys 20 via both transmission belts 46, whereby the large-diameter pulley 20a is rotationally driven together with the small-diameter pulleys.

Next, with reference to FIGS. 5 and 6, a second stand 22 installed on the lower floor 14b and a pair of tail pulleys 24 supported by the second stand 22 will be described.

The second stand 22 has a pair of legs 50 that are spaced apart from each other and face each other. Each of the legs 50 includes a pair of plate-shaped base members 52, a pair of plate-shaped elongated members 54 supported by both base members 52, and two pairs of plate-shaped L-shaped members 56.

In the figure, both base members 52 are placed on the floor slab 14b on the lower floor and are located on the sides of both short edges of the opening 16. Both elongated members 54 are in contact with both side walls 16a that define both short edges of the base member 52 and the opening 16 at one end thereof (lower end portion in the drawing), respectively. Further, the two pairs of L-shaped members 56 are located on both sides of both elongated members 54, and their long side portions 56a extend the four corners of the opening 16 from above the opening 16 into the opening 16. Each L-shaped member 56 is in contact with each base member 52 and the side wall 16a of the opening 16 and the side wall 16b (which defines each long edge of the opening 16) at its long side portion 56a. Further, each L-shaped member 56 is in contact with the lower surface 58 of the floor slab 14b on the lower floor that defines the opening 16 at its short side portion 56b.

Both tail pulleys 24 are arranged at intervals from each other between the other ends (upper ends in the drawing) of both elongated members 54, and are fixed to a shaft 57 rotatably supported by these upper ends. The mutual distance between the two tail pulleys 24 is the same as the mutual distance between the large diameter pulleys 20a of both head pulleys 20.

As shown in FIG. 6, each elongated member 54 is arranged at intervals in the longitudinal direction (vertical direction in the drawing) and has two slots 60 extending in the longitudinal direction of the elongated member 54. Each elongated member 54 is provided via two pin bolts 62 having shaft portions penetrating the base member 52 via both slots 60 and two nuts (not shown) screwed into the shaft portions of these pin bolts. It is leasably fixed to the base member 52. Each elongated member 54 can be moved in the extending direction of both slots 60 with respect to the base member 52 by loosening the nut. Further, each elongated member 54 has a circular hole 64 connected to one end portion (lower end portion in the drawing) of both slots 60 in the extending direction. Both circular holes 64 each have a diameter larger than the diameter of the head of both pin bolts 62. Therefore, the elongated member 54 can be separated from the base member 52 by moving each elongated member 54 relative to the base member 52 and placing both circular holes 64 at positions aligned with the heads of both pin bolts 62. ..

The elongated member 54 and the base member 52 are provided with a rack 66 and a pinion 68, which mesh with each other and extend in the extending direction (vertical direction in the drawing) of the elongated member 54, respectively. Further, the base member 52 is provided with a pawl 70 that constitutes a ratchet mechanism together with the pinion 68. According to this, by rotating the pinion 68 in one direction (clockwise as seen in FIG. 6), the elongated member 54 placed in a state of being relatively movable with respect to the base member 52 is moved downward. be able to. Further, the elongated member 54 is stopped at the position after movement by the action of the pawl 70 on the pinion 68. The elongated member 54 after movement can be fixed to the base member 52 by tightening the nut.

The base member 52 is provided with two slots (horizontal slots) 72 extending in the lateral direction (horizontal direction or horizontal direction in the drawing) at intervals in the lateral direction. Further, the pair of L-shaped members 56 are provided with a pair of slots (vertical slots) 74 extending in the longitudinal direction, that is, the vertical direction, on their long side portions 56a. Each horizontal slot 72 and each vertical slot 74 intersect each other in a cross shape, the shaft portion of the bolt 76 penetrates the intersection, and a nut (not shown) is screwed into the shaft portion of the bolt. .. By tightening the nut, the base member 52 is releasably fixed to the floor slab 14b on the lower floor via the pair of L-shaped members 56. The relative position of the base member 52 and each L-shaped member 56 can be adjusted within the length range of both the vertical and horizontal slots 72 and 74.

Next, the carrier 26 will be described. As schematically shown in FIG. 1, the carrier 26 has a pair of endless (and therefore annular) cords hung on both head pulleys 20 (specifically, large diameter pulleys 20a) and both tail pulleys 24. It has an object 78 and a plurality of crosspieces 80 attached to both cord-like objects 78 in parallel with each other. The cord 78 is composed of a rope, a cable, a belt, a chain, or the like, and has flexibility. Both head pulleys 20 and both tail pulleys 24 are those that constitute the cord-like object 78, that is, those that have a flat surface as in the illustrated example, those that have grooves, those that are made of sprockets, and the like, depending on the type thereof. can do. The crosspiece 80 is made of, for example, steel bar. The quantity and mutual spacing of the crosspieces 80 can be arbitrarily determined. It is desirable that the plurality of crosspieces 80 be arranged outside the ring so that they do not interfere with the mutual contact between the cord 78 and the head pulley 20 and the tail pulley 24. Further, the crosspiece 80 preferably has a length dimension slightly larger than the mutual distance between the two cords 78.

Both head pulleys 20 and both cord-like objects 78 hung on both tail pulleys 24 are in a tense state. The tension state of both cords 78 is obtained by deflecting both tail pulleys 24 downward. Both tail pulleys 24 can be deflected by moving the elongated member 54 downward with respect to the base member 52 of the second stand 22 and maintaining the position after the movement.

Both cord-like objects 78 rotate around both head pulleys 20 and both tail pulleys 24 by rotationally driving both head pulleys 20. As the both cords 78 rotate, the plurality of crosspieces 80 continuously rise and fall.

8 and 9 show an example of the receiving platform 28. The load receiving table 28 is pivotally attached to the back plate 82, a pair of hooks 84 attached to the back plate at intervals, a load receiving plate 86 pivotally attached to the back plate 82, and a back plate 82, respectively. A pair of side plates 88 and a pair of rods 90 supported by a back plate 82 so as to be vertically movable are provided. The loading platform 28 has a size capable of passing between the head pulleys 20 and the openings 16 of each floor 14.

The back plate 82 shown is a rectangular frame, the opening thereof of which is covered with a rectangular plate 83, and the frame has a pair of short side portions 82a and a pair of long side portions 82b. The length dimension of the short side portion 82a, which is the width dimension of the back plate 82, defines the width dimension of the load receiving table 28, and the width dimension of the load receiving table 28 is smaller than the mutual distance between the two head pulleys 20. Both hooks 84 are fixed to the short side portion 82a of one of the back plates 82 (upper in FIG. 8). The loading platform 28 can be hooked on an arbitrary crosspiece 80 of the carrier 26 via both hooks 84.

The consignment plate 86 includes a rectangular frame 92 and a wire mesh 94 fixed to the frame and covering the opening of the frame. The frame 92 has a pair of long side portions 92a having the same length as the short side portion 82a of the back plate 82, and a pair of short side portions 92b. The load receiving plate 86 is pivotally connected to the short side portion 82a of the other side (lower in FIG. 8) of the back plate 82 via a pair of connecting members 96 at one long side portion 92a of the frame 92. One long side portion 92a extends in parallel with the short side portion 82a below the back plate 82. Further, the load receiving plate 86 is placed in a state perpendicular to the load receiving plate 86 via a pair of brackets 102 (FIG. 8). Both brackets 102 are a pair of sliders 98 slidably attached to the frame 92 of the load receiving plate 86 and both long side portions 82b of the back plate 82 in the longitudinal direction, respectively, and both of the back plates 82. It is pivotally attached to a pair of sliders 98 in contact with a pair of stoppers 100 fixed to each of the long side portions 82b. The load can be loaded on the load receiving plate 86 in the state shown in FIG. The consignment plate 86 can be brought into a folded state by pivoting toward the back plate 82 (FIG. 9). At this time, both brackets 102 swing and both sliders 98 rise, and both brackets 102 are placed in parallel with both long side portions 82b of the frame of the back plate 82, respectively.

Each of the side plates 88 has a pair of rectangular frames 103. Each of the frames 103 has a pair of long side portions 103a extending in parallel with the long side portion 82b of the back plate 82 from the height position of the short side portion 82a above the back plate 82 to the upper position of the slider 98. Both frames 103 are pivotally connected to both long side portions 82b of the back plate 82 via a pair of connecting members 104 at one of the long side portions 103a. Both side plates 88 are placed in a state orthogonal to the back plate 82 in order to hold the load on the load receiving plate 86 (FIG. 8). The side plates 88 can be brought into a folded state by pivoting toward the back plate 82 (FIG. 9).

Each of the pair of rods 90 is fixed to both sliders 98 and extends from both sliders 98 to a height position below the load receiving plate 86 (FIG. 8). Both rods 90 have a length dimension that allows the load receiving base 28 to come into contact with another stile 80 located below the one stile when the load receiving base 28 is hooked on one stile 80 of the carrier 26. (Fig. 7). The contact of both rods 90 with the other rods 80 prevents the pedestal 28 from swinging around one of the rods 80. As a result, the back plate 82 of the load receiving table 28 hangs down substantially vertically, and the inclination of the load receiving table 28 and the accompanying spillage of the load are prevented. When the load receiving plate 86 is folded, the brackets 102 swing, and the sliders 98 rise, the rods 90 rise together with the sliders 98, and the lower ends thereof are the short side portions 82a below the back plate 82. It reaches the same height position as (Fig. 9).

When the lifting device 12 is used, the load is loaded on the one loading platform 28 on the lower floor 14b, and both head pulleys 20 are rotationally driven to move the one loading platform 28 up and down via the carrier 26. It can be raised through the opening 16 of one or more floors 14 between the floors 14a and 14b and the opening 16 of the upper floor 14a to reach the upper floor 14a. While the rotational drive of both head pulleys 20 is stopped, the load can be unloaded from the load receiving table 28 that has reached the upper floor 14a. Further, the empty loading platform 28 is folded, and then the head pulleys 20 are rotationally driven again to lower the pedestal 28 to the lower floor 14b via the carrier 26 (see FIG. 7). ), After reaching the lower floor 14b, the rotational drive of both head pulleys 20 can be stopped, and the load can be loaded again on one load receiving table 28. During this time, for example, when one consignment 28 reaches the upper floor 14a, another consignment 28 may be on the lower floor 14b so that the load can be loaded therein.

Since the width dimension of the cradle 28 emptied on the upper floor 14a is smaller than the mutual distance between the two head pulleys 20, swinging around the crosspiece 80 is allowed when passing between the two head pulleys 20. Will be done. Therefore, when the load receiving table 28 changes from rising to falling, it swings with respect to the crosspiece 80 and passes between the two head pulleys 20 while maintaining the posture.

Further, the load receiving plate 86 and the side plates 88 of the load receiving table 28 are folded toward the back plate 82, whereby the load receiving table 28 is formed into a flat shape, so that the load receiving table 28 is formed downward from the upper floor 14a as shown in FIG. The ratio of the thickness dimension (thickness dimension between the side walls 16b of the opening 16) to the temporary opening 16 of each floor through which the empty consignment 28 descending to the floor 14b passes is smaller and lower. The proportion of the thickness dimension occupied by the cradle 28 ascended from the floor 14b to the upper floor 14a can be made larger. Therefore, the loading capacity of the load on the loading platform 28 can be made larger.

After completing the transportation of the load to the upper floor 14a, the lifting device 12 is re-installed on the floor one level above the upper floor 14a and the floor one level above the lower floor 14b, and then re-installed. Can be used. A part of the carrier 26 in which the first stand 18 of the lifting device 12 is removed from both tail pulleys 24 and hung on both head pulleys 20 to be used for reuse, that is, both cords 78. It is possible to provide a retractor 106 for temporarily storing a part of the rod 80 and a part or all of the plurality of crosspieces 80 (FIG. 10).

The illustrated storage tool 106 comprises a pair of receiving members 108 that are detachably attached to the connecting members 32 of both legs 30 of the first stand 18 at intervals from each other. Each of the receiving members 108 has a pair of yoke-shaped tip portions 110. Each tip 110 has two elongated portions 110a and 110b that extend in a V shape. The long both extension portions 110a intersect the descending side (return side) of both cord-like objects 78 between the two cord-like objects 78 hanging from both head pulleys 20, respectively. From this, it is possible to sequentially receive the plurality of crosspieces 80 that have changed from ascending to descending by rotationally driving both head pulleys 20 at both the elongated extending portions 110a, and to hold them between the two elongated portions 110a and 110b. it can. On the other hand, the descending portion of both cord-like objects 78 is placed in a state of hanging from a plurality of retained stiles 80. Further, with respect to the plurality of receiving pedestals 28, one of them is hooked on the crosspiece 80 located on the ascending side (carrier side), and another receiving pedestal 28 is attached to the back plate 82 of the receiving pedestal 28, and another receiving pedestal. By sequentially hooking the 28 to the back plate 82 of the other cradle 28, the plurality of cradle 28 can be held on the first stand 18.

Further, the first stand 18 may have two pairs of wheels 112 attached to its legs 30 respectively. According to this, the first stand 18 in which the carrier 26 is hung on both head pulleys 20 and a part of the carrier 26 is stored in the retractor 106 and a plurality of load receiving stands 28 are held is further the same. It can be moved by running to other openings (atrium) on the floor. Regarding the second stand 22, the base member 52, the elongated member 54, and the L-shaped member 56 that constitute the second stand 22 can be moved in a state of being separated from each other.

10 Building 12 Lifting device 14 Floor 16 Temporary opening 18 First stand 20 Head pulley 22 Second stand 24 Tail pulley 26 Transporter 28 Loading platform 34 Drive mechanism 66 Rack 68 Pinion 78 Cable 80 Rail bar 82 Back plate 84 Hook 86 Receiving plate 88 Side plate 90 Rod 106 Retractor 112 Wheel

Claims (5)

A lifting device that is applied to a building with multiple floors under construction.
A pair of head pulleys that are rotatably supported independently of each other and independently on a first stand installed on the upper floor of the building.
A pair of tail pulleys rotatably supported by a second stand installed on the lower floor of the building,
A temporary carrier having a pair of endless cords hung on both head pulleys and tail pulleys and a plurality of crosspieces attached to both cords in parallel to each other, and provided on each floor of the building. The carrier that is passed through the opening and
A lifting device having a size capable of passing between both head pulleys and the temporary opening, which is a plurality of load receiving platforms that can be hooked on any crosspiece of the carrier. The lifting device according to claim 1, further comprising a drive mechanism for rotationally driving both head pulleys, which is supported by the first stand. The lifting device according to claim 1 or 2, further comprising a storage tool provided on the first stand for temporarily storing a part of the transport tool removed from both tail pulleys. The lifting device according to any one of claims 1 to 3, wherein the first stand has a plurality of wheels. The loading platform includes a back plate, a pair of hooks attached to the back plate at intervals, a receiving plate pivotally attached to the back plate, and a pair of side plates pivotally attached to the back plate. Any one of claims 1 to 4, further comprising a pair of rods that are vertically movablely supported on the back plate and that can come into contact with the crosspieces of the carrier. The lifting device described in.

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