Lifting beam device

Abstract

To provide a suspension beam device that is able to prevent a decrease in an amount of suspendable haul, without adding a drive unit even if the length of the suspension beam device increases.SOLUTION: A suspension beam device 1 includes: a long body portion 2; a first extendable portion 3 provided so as to be movable in a longitudinal direction of the body portion 2 with respect to the body portion 2 on a one-end A side of the body portion 2; a first trolley 5 supported in the body portion 2 so as to be movable in the longitudinal direction of the body portion 2 with respect to the body portion 2; a drive unit 20 for moving the first extendable portion 3 and the first trolley 5; and a transmitting portion 30 that disperses and transmits drive force of the drive unit 20 to the first extendable portion 3 and the first trolley 5 to move the first extendable portion 3 and the first trolley 5.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a suspension beam device. [Background technology]

[0002] A known lifting beam device used to hoist and transport objects such as steel plates is one in which an extension section is provided at one or both ends of the elongated main body of the lifting beam device so that it can transport objects of different lengths (see Patent Document 1). In this type of lifting beam device, electromagnets are suspended from a trolley or extension section provided below the main body, and the transported object is magnetically attracted to each electromagnet, and the main body is suspended by a crane to transport the object. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5058907 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the longer the load, the longer the hoisting beam device will be, and the more electromagnets will be required, which means that the number of trolleys for suspending the electromagnets will also need to be increased. Furthermore, when multiple electromagnets are magnetically attracted to a transported object, the multiple electromagnets are magnetically attracted so as to be spaced as evenly apart as possible.

[0005] Therefore, it is necessary to move the trolley relative to the main body in the longitudinal direction of the main body. However, in this case, if a drive unit equipped with a motor or the like is added to the lifting beam device in order to move the trolley, the amount of transported load that can be suspended will be reduced by the weight of the increased drive unit, since the rated weight that can be suspended by a crane is fixed.

[0006] The present invention has been made in consideration of the above-mentioned points, and aims to provide a hanging beam device that can prevent a decrease in the amount of transported load that can be suspended without adding an additional driving unit, even if the length of the hanging beam device becomes longer. [Means for solving the problem]

[0007] The hoisting beam device according to the present invention is An elongated main body portion; A first extension / contraction section provided at one end side of the main body section so as to be movable in a longitudinal direction of the main body section relative to the main body section; A first trolley supported on the main body so as to be movable in a longitudinal direction of the main body relative to the main body; A drive unit for moving the first telescopic unit and the first trolley; A transmission unit that distributes and transmits the driving force of the driving unit to the first telescopic unit and the first trolley to move the first telescopic unit and the first trolley; Equipped with 、 The transmission unit includes a telescopic unit sprocket for transmitting the driving force of the drive unit to the first telescopic unit, and a trolley sprocket for transmitting the driving force of the drive unit to the first trolley, and the telescopic unit sprocket and the trolley sprocket are coaxially provided. do. Effect of the Invention

[0008] According to the present invention, it is possible to prevent a decrease in the amount of transported load that can be suspended, even if the length of the hoisting beam device is increased, without adding an additional driving unit. [Brief description of the drawings]

[0009] [Figure 1] 1 is a diagram illustrating a configuration of a hanging beam device according to a first embodiment. [Diagram 2] This is a view of a portion of the transmission part of the hanging beam device, including one first sprocket and one third sprocket, viewed in the longitudinal direction of the main body. [Diagram 3] FIG. 11 is a diagram illustrating a configuration of a hanging beam device according to a second embodiment. [Figure 4] 13A and 13B are diagrams illustrating modified examples of the transmission unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of a hanging beam device according to the present invention will be described with reference to the drawings. In the following, a case where an expandable portion is provided at each end of the main body portion will be described, but an expandable portion may be provided only at one end of the main body portion. In addition, in the following, a case where an expandable portion is provided in one stage (where one expandable portion is provided at each end of the main body portion) will be described, but an expandable portion may be provided in two or more stages.

[0011] In addition, the following describes a case where four trolleys are provided, but the number of trolleys is not limited to four. For convenience of explanation, the longitudinal direction of the main body 2 will be referred to as the X-axis direction.

[0012] [First embodiment] FIG. 1 is a diagram illustrating a configuration of a hanging beam device according to a first embodiment of the present invention. In this embodiment, the suspension beam device 1 comprises a long main body 2 supported by a crane not shown, a first extension section 3 arranged at one end A of the main body 2 so as to be movable in the X-axis direction relative to the main body 2, a second extension section 4 arranged at the other end B of the main body 2 (end B opposite the first extension section 3) so as to be movable in the X-axis direction relative to the main body 2, first to fourth trolleys 5 to 8 supported on the main body 2 so as to be movable in the X-axis direction, and a number of electromagnets 9 suspended from the first and second extension sections and the first to fourth trolleys, respectively.

[0013] The hoisting beam device 1 magnetically attracts a plurality of electromagnets 9 to a long steel plate 10, which is an object to be transported. The main body 2 of the hoisting beam device 1 is hoisted by a crane (not shown), thereby hoisting the steel plate 10, and the steel plate 10 is transported.

[0014] The main body 2 is a cylindrical member that is open at both ends (one end A and the other end B) in its longitudinal direction (X-axis direction) and also at its bottom. Although not shown, the main body 2 has a top surface on one end A side and a top surface on the other end B side provided with hook connecting portions to which a crane hook is connected.

[0015] The first telescopic section 3 is a cylindrical member extending in the X-axis direction and having a cross section that is approximately square-shaped. One end 3a of the first telescopic section 3 protrudes to the outside of the main body 2. Below the first telescopic section 3, rollers 3c are provided to support the first telescopic section 3 so that it can move in the X-axis direction relative to the main body 2. The other end 3b of the first telescopic section 3 is provided with lateral rollers 3d and the like, and is supported in a state in which it can move in the X-axis direction within the main body 2 while displacement in a direction perpendicular to the X-axis direction is restricted. An electromagnet support part 3e that protrudes downward is provided on the lower surface of the first expandable part 3, and an electromagnet 9 is suspended approximately horizontally from the electromagnet support part 3e via an electromagnet chain 11.

[0016] The second telescopic section 4 is a tubular member with a generally square cross section extending in the X-axis direction, and one end 4a of the second telescopic section 4 protrudes to the outside of the main body 2. Below the second telescopic section 4, rollers 4c are provided to support the second telescopic section 4 so that it can move in the X-axis direction relative to the main body 2. The other end 4b of the second telescopic section 4 is provided with lateral rollers 4d and the like, and is supported in a state where it can move in the X-axis direction within the main body 2 while displacement in a direction perpendicular to the X-axis direction is restricted. An electromagnet support part 4e that protrudes downward is provided on the lower surface of the second expandable part 4, and an electromagnet 9 is suspended approximately horizontally from the electromagnet support part 4e via an electromagnet chain 11.

[0017] The first trolley 5 and the second trolley 6 are suspended below the center of the longitudinal direction of the main body 2 so as to be movable in the X-axis direction relative to the main body 2. Below the first trolley 5 and the second trolley 6, electromagnets 9 are respectively suspended approximately horizontally via electromagnet chains 11.

[0018] The third trolley 7 and the fourth trolley 8 have a structure similar to the first trolley 5 and the second trolley 6, and the third trolley 7 is suspended from the lower part of one end A of the main body 2, and the fourth trolley 8 is suspended from the lower part of the other end B of the main body 2, so as to be movable in the X-axis direction relative to the main body 2. Below the third trolley 7 and the fourth trolley 8, electromagnets 9 are respectively suspended approximately horizontally via electromagnet chains 11.

[0019] Next, a drive mechanism for moving the first and second beams and the first to fourth trolleys in the hanging beam device 1 will be described with reference to the drawings.

[0020] As shown in FIG. 1, the main body 2 is provided on its upper surface with a drive unit 20 including a motor 21 and the like. In the drive unit 20, the output of the motor 21 is transmitted to the output gear 23 via the gear box 22, causing the output gear 23 to rotate.

[0021] Furthermore, a pair of first sprockets 31, 32 spaced apart in the X-axis direction are provided on the main body 2 as part of the transmission part 30. The pair of first sprockets 31, 32 are arranged such that their tooth tips face each other in the X-axis direction. One of the first sprockets 31 is disposed near the drive unit 20 and is provided at a position closer to the drive unit 20 than the first trolley 5 and the second trolley 6. The other of the first sprockets 32 is disposed on one end A side of the main body 2.

[0022] A motor roller chain 25 is stretched between a drive sprocket 24 coaxial with the first sprocket 31 and the output gear 23 . A circular first roller chain 33 is stretched between the pair of first sprockets 31, 32. A first fixed part 3f is fixed to the upper surface of the first telescopic part 3, and both ends of the first roller chain 33 are fixed to the first fixed part 3f by adjuster bolts that can adjust the length of the chain. The first roller chain 33 is supported by an idler 34 on the upper surface of the main body 2.

[0023] A pair of second sprockets 40, 41 spaced apart in the X-axis direction are provided on the main body 2 as part of the transmission part 30. One second sprocket 40 is disposed adjacent to one first sprocket 31, and the other second sprocket 41 is disposed on the other end B side of the main body 2. One of the first sprockets, 31, is provided with a gear 35 coaxial with the first sprocket 31. Similarly, one of the second sprockets, 40, is provided with a gear 42 coaxial with the second sprocket 40. The gear 35 coaxial with the first sprocket 31 and the gear 42 coaxial with the second sprocket 40 mesh with each other and transmit the driving force of the drive unit 20 to the second sprocket 40.

[0024] A circular second roller chain 43 is stretched between the pair of second sprockets 40, 41. A second fixed part 4f is fixed to the upper surface of the second telescopic part 4, and both ends of the second roller chain 43 are fixed to the second fixed part 4f by adjuster bolts that can adjust the length of the chain. In addition, the second roller chain 43 is supported by an idler 44 on the upper surface of the main body 2.

[0025] A pair of third sprockets 50, 51 spaced apart in the X-axis direction are provided at the bottom of the main body 2 as part of the transmission part 30. The pair of third sprockets 50, 51 are arranged such that their tooth tips face each other in the X-axis direction. One of the third sprockets 50 is disposed below one of the first sprockets 31. The other of the third sprockets 51 is disposed midway from one of the third sprockets 50 toward one end A of the main body 2.

[0026] A circular third roller chain 52 is stretched between the pair of third sprockets 50, 51. Both ends of the third roller chain 52 are fixed to both ends in the X-axis direction of the first trolley 5 by adjuster bolts that can adjust the length of the chain.

[0027] A pair of fourth sprockets 60, 61 spaced apart in the X-axis direction are provided at the bottom of the main body 2 as part of the transmission part 30. One fourth sprocket 60 is disposed adjacent to one third sprocket 50, and the other fourth sprocket 61 is disposed midway from the one fourth sprocket 60 toward the other end B of the main body 2. One of the third sprockets 50 is provided with a gear 53 coaxial with the third sprocket 50. Similarly, one of the fourth sprockets 60 is provided with a gear 62 coaxial with the fourth sprocket 60. The gear 53 coaxial with the third sprocket 50 and the gear 62 coaxial with the fourth sprocket 60 mesh with each other.

[0028] A circular fourth roller chain 63 is stretched between the pair of fourth sprockets 60, 61. Both ends of the fourth roller chain 63 are fixed to both ends in the X-axis direction of the second trolley 6 by adjuster bolts that can adjust the length of the chain.

[0029] FIG. 2 is a view of a portion of the transmission section of the hanging beam device according to this embodiment, including one first sprocket and one third sprocket, as viewed in the longitudinal direction of the main body. As mentioned above, the gear 35, one of the first sprockets 31, and the drive unit sprocket 24 are coaxially fixed to the upper part of the main body 2, and further, one of the fifth sprockets 90 is coaxially fixed as part of the transmission unit 30.

[0030] As mentioned above, the gear 53 and one of the third sprockets 50 are coaxially fixed to the lower part of the main body 2, and further, the other fifth sprocket 91 is coaxially fixed thereto as part of the transmission part 30. A circular fifth roller chain 92 is stretched between the pair of fifth sprockets 90, 91. The fifth roller chain 92 is tensioned by a tensioning bracket 93 provided between the pair of fifth sprockets 90, 91.

[0031] On the other hand, in the configuration example shown in Fig. 1, a sixth sprocket 70 having a rotating shaft extending in a direction perpendicular to the X-axis direction is disposed on the upper part of the third trolley 7. A sixth roller chain 71 is stretched across the sixth sprocket 70. One end of the sixth roller chain 71 is fixed to an adjuster bolt 3g on the underside of one end 3a of the first telescopic section 3 (at a position closer to one end A of the main body 2 than the sixth sprocket 70). The other end of the sixth roller chain 71 is fixed to an adjuster bolt 2a provided on the bottom surface of the main body 2 at a position closer to one end A of the main body 2 than the sixth sprocket 70.

[0032] Additionally, a seventh sprocket 72 having a rotating shaft extending in a direction perpendicular to the X-axis direction is disposed on the upper portion of the third trolley 7, closer to the other end B of the main body 2 than the sixth sprocket 70. A seventh roller chain 73 is stretched across the seventh sprocket 72. One end of the seventh roller chain 73 is fixed to an adjuster bolt 3h provided on the other end 3b side of the first telescopic section 3 (at a position closer to the other end B of the main body 2 than the seventh sprocket 72). The other end of the seventh roller chain 73 is fixed to an adjuster bolt 2b provided on the bottom surface of the main body 2, at a position closer to the other end B of the main body 2 than the seventh sprocket 72.

[0033] An eighth sprocket 80 having a rotating shaft extending in a direction perpendicular to the X-axis direction is disposed on the upper part of the fourth trolley 8. An eighth roller chain 81 is stretched across the eighth sprocket 80. One end of the eighth roller chain 81 is fixed to an adjuster bolt 4g on the underside of one end 4a of the second telescopic section 4 (at a position closer to the other end B of the main body 2 than the eighth sprocket 80). The other end of the eighth roller chain 81 is fixed to an adjuster bolt 2c provided on the bottom surface of the main body 2 at a position closer to the other end B of the main body 2 than the eighth sprocket 80.

[0034] Additionally, a ninth sprocket 82 having a rotating shaft extending in a direction perpendicular to the X-axis direction is disposed on the upper portion of the fourth trolley 8, closer to one end A of the main body 2 than the eighth sprocket 80. A ninth roller chain 83 is stretched across the ninth sprocket 82. One end of the ninth roller chain 83 is fixed to an adjuster bolt 4h provided on the other end 4b side of the second telescopic section 4 (at a position closer to one end A of the main body 2 than the ninth sprocket 82). The other end of the ninth roller chain 83 is fixed to an adjuster bolt 2d provided on the bottom surface of the main body 2 at a position closer to one end A of the main body 2 than the ninth sprocket 82.

[0035] The operation of the hoisting beam device 1 according to this embodiment configured as above will be described. In the following description, the rotation direction of each member is indicated as clockwise or counterclockwise in accordance with the drawing in FIG.

[0036] When extending the overall length of the hoisting beam device 1, first, the motor 21 of the drive unit 20 is driven to rotate the output gear 23 to the right. When the output gear 23 rotates clockwise, the rotation is transmitted to the drive sprocket 24 via the motor roller chain 25, causing the drive sprocket 24 to rotate clockwise.

[0037] When the drive unit sprocket 24 rotates clockwise, the rotation is transmitted to one of the first sprockets 31 of the transmission unit 30 provided coaxially with the drive unit sprocket 24, causing the one of the first sprockets 31 to rotate clockwise. When one of the first sprockets 31 rotates to the right, the circular first roller chain 33 is sent in a clockwise direction, causing the other first sprocket 32 ​​to rotate to the right, and the first fixed portion 3f, to which both ends of the first roller chain 33 are fixed, moves toward one end A of the main body portion 2.

[0038] When the first fixed portion 3f moves, the first extendable portion 3 to which the first fixed portion 3f is fixed moves so as to protrude from the one end A of the main body portion 2. In this way, the drive unit 20 functions as a drive unit for moving the first expandable unit 3.

[0039] In addition, when the drive unit sprocket 24 rotates to the right by the drive unit 20 as described above, the rotation is transmitted to one of the fifth sprockets 90 of the transmission unit 30, which is arranged coaxially with the drive unit sprocket 24, causing the one of the fifth sprockets 90 to rotate to the right. When one fifth sprocket 90 rotates clockwise, the circular fifth roller chain 92 is fed clockwise, causing the other fifth sprocket 91 to rotate clockwise.

[0040] When the other fifth sprocket 91 rotates to the right, the rotation is transmitted to one of the third sprockets 50 which is arranged coaxially with the other fifth sprocket 91, causing the one third sprocket 50 to rotate to the right. When one of the third sprockets 50 rotates to the right, the circular third roller chain 52 is sent in a clockwise direction, causing the other third sprocket 51 to rotate to the right, and the first trolley 5, to which both ends of the third roller chain 52 are fixed, moves toward one end A of the main body 2 relative to the main body 2.

[0041] In this way, the drive unit 20 functions as a drive unit for moving the first trolley 5. In addition, the transmission unit 30 distributes and transmits the driving force of the drive unit 20 not only to the first telescopic unit 3 but also to the first trolley 5, thereby moving the first trolley 5 in accordance with the telescopic movement of the first telescopic unit 3.

[0042] In addition, in this embodiment, when the drive unit sprocket 24 rotates clockwise by the drive unit 20 as described above, the rotation is transmitted to one of the second sprockets 40 via gears 35, 42, causing the one of the second sprockets 40 to rotate counterclockwise. When one second sprocket 40 rotates left, the circular second roller chain 43 is sent in a counterclockwise direction, the other second sprocket 41 rotates left, and the second fixed part 4f, to which both ends of the second roller chain 43 are fixed, moves toward the other end B of the main body 2. When the second fixed part 4f moves, the second expandable part 4, to which the second fixed part 4f is fixed, moves so as to protrude from the other end B of the main body 2.

[0043] In this manner, in this embodiment, the drive unit 20 also functions as a drive unit for moving the second expandable unit 4. In this embodiment, the transmission section 30 is configured to distribute and transmit the driving force of the drive section 20 to the second expandable section 4 as well.

[0044] As described above, the drive unit sprocket 24 rotates to the right by the drive unit 20, and that rotation is transmitted to the other fifth sprocket 91 via the one fifth sprocket 90 and the circular fifth roller chain 92. When the other fifth sprocket 91 rotates to the right, that rotation is transmitted to the one fourth sprocket 60 via gears 53, 62, causing the one fourth sprocket 60 to rotate to the left.

[0045] When one of the fourth sprockets 60 rotates to the left, the circular fourth roller chain 63 is sent in a counterclockwise direction, causing the other fourth sprocket 61 to rotate to the left, and the second trolley 6, to which both ends of the fourth roller chain 63 are fixed, moves toward the other end B of the main body 2 relative to the main body 2.

[0046] In this manner, the drive unit 20 functions as a drive unit for moving the second trolley 6. In addition, the transmission unit 30 distributes and transmits the driving force of the drive unit 20 not only to the second extension unit 4 but also to the second trolley 6, thereby moving the second trolley 6 in accordance with the movement of the second extension unit 4.

[0047] In this embodiment, as described above, the driving force of the drive unit 20 is distributed and transmitted, and the first and second telescopic units 3 and 4 move in opposite directions in synchronization with each other. That is, the first telescopic unit 3 moves to protrude from one end A of the main body unit 2, and in synchronization with this, the second telescopic unit 4 moves to protrude from the other end B of the main body unit 2. In synchronization with this, the first trolley 5 moves to one end A of the main body 2 and the second trolley 6 moves to the other end B of the main body 2 .

[0048] In this embodiment, as described above, when the first telescopic section 3 moves to protrude from one end A of the main body section 2, one end (the end fixed to the adjuster bolt 3g of the first telescopic section 3) of the sixth roller chain 71 hung on the sixth sprocket 70 of the third trolley 7 moves to protrude from one end A of the main body section 2. When one end of the sixth roller chain 71 moves to protrude from one end A of the main body section 2, the sixth sprocket 70 rotates left, and a force pulling the sixth sprocket 70 toward one end A of the main body section 2 is generated by the tension of the sixth roller chain 71, and the third trolley 7 moves toward one end A of the main body section 2 relative to the main body section 2.

[0049] In addition, in this embodiment, as described above, the second telescopic section 4 moves to protrude from the other end B of the main body section 2, so that one end of the eighth roller chain 81 (the end fixed to the adjuster bolt 4g of the second telescopic section 4) stretched over the eighth sprocket 80 of the fourth trolley 8 moves to protrude from the other end B of the main body section 2. When one end of the eighth roller chain 81 moves to protrude from the other end B of the main body section 2, the eighth sprocket 80 rotates to the right, and a force pulling the eighth sprocket 80 toward the other end B of the main body section 2 is generated by the tension of the eighth roller chain 81, and the fourth trolley 8 moves toward the other end B of the main body section 2 relative to the main body section 2.

[0050] On the other hand, when shortening the overall length of the hoisting beam device 1, the motor 21 of the drive unit 20 is rotated in the reverse direction to rotate the output gear 23 counterclockwise, and each sprocket etc. of the transmission unit 30 rotates in the opposite direction. Therefore, the first telescopic section 3 and the second telescopic section 4 each move toward the inside of the main body section 2, and in sync with this, the first trolley 5 and the third trolley 7 move toward the other end B of the main body section 2, and the second trolley 6 and the fourth trolley 8 move toward one end A of the main body section 2.

[0051] As described above, according to the suspension beam device 1 of this embodiment, the driving force of the drive unit 20 for moving the first extension section 3 is distributed and transmitted by the transmission unit 30 not only to the first extension section 3 but also to the first trolley 5, thereby moving the first trolley 5. Therefore, there is no need to add a drive unit for moving the first trolley 5 in addition to the drive unit 20 for moving the first extension section 3, which makes it possible to prevent a situation in which the amount of transported load that can be suspended is reduced by the amount of the drive unit added to the suspension beam device 1.

[0052] In addition, with the hanging beam device 1 of this embodiment, there is no need to install a new drive unit as described above, so there is no need to install a new motor, output gear, roller chain, etc. that constitute the drive unit, and since there is no need for parts to accommodate the new drive unit, it is also possible to prevent an unnecessary increase in the number of parts. Furthermore, since there is no need to provide a new drive unit and only one motor 21 is required, maintenance is easier than when additional motors are required.

[0053] In addition, in this embodiment, the first trolley 5 is provided at the lower part of the main body 2 of the suspension beam device 1, a drive unit 20 equipped with a motor 21 etc. is provided at the upper part of the main body 2, and a transmission unit 30 equipped with a first sprocket 31 etc. is provided at a position closer to the drive unit 20 than the first trolley 5. Providing the transmission unit 30 in this manner close to the drive unit 20 is preferable because it is less likely to cause problems such as tooth skipping in the drive unit sprockets 24, which are arranged coaxially with the first sprocket 31, etc., compared to when the transmission unit 30 is provided in a position farther from the drive unit 20.

[0054] In addition, in this embodiment, the driving force of the drive unit 20 for moving the first extension section 3 is distributed and transmitted by the transmission unit 30 not only to the first trolley 5 but also to the second extension section 4 and the second trolley 6, thereby moving the second extension section 4 and the second trolley 6 as well. Therefore, even in a suspension beam device 1 having both a first telescopic section 3 and a second telescopic section 4, similar to the above, it is possible to obtain beneficial effects such as preventing a decrease in the amount of transported load that can be suspended even if the length of the suspension beam device 1 becomes longer without adding additional drive sections.

[0055] [Second embodiment] FIG. 3 is a diagram illustrating a configuration of a hanging beam device according to a second embodiment of the present invention. In the first embodiment, a case was described in which the third trolley 7 moves in conjunction with the movement of the first extension section 3, and the fourth trolley 8 moves in conjunction with the movement of the first extension section 3. However, similar to the first trolley 5 and the second trolley 6, the third trolley 7 and the fourth trolley 8 can also be configured to move by transmitting the driving force of the drive unit 20 via the transmission unit 30.

[0056] The following describes the configuration and other aspects that are different from the first embodiment with reference to FIG. A pair of tenth sprockets 74, 75 spaced apart in the X-axis direction are provided as part of the transmission part 30 at the lower part on the one end A side of the main body part 2. The tenth sprocket 74 is disposed coaxially with the other third sprocket 51. The other tenth sprocket 75 is disposed in the vicinity of one end A of the main body 2.

[0057] A circular tenth roller chain 76 is stretched between the pair of tenth sprockets 74, 75. The tenth roller chain 76 has both ends fixed to both ends in the X-axis direction of the third trolley 7 by adjuster bolts that can adjust the length of the chain.

[0058] Further, a pair of eleventh sprockets 84, 85 spaced apart in the X-axis direction are provided as part of the transmission part 30 at the lower part on the other end B side of the main body part 2. The eleventh sprocket 84 is disposed coaxially with the other, fourth sprocket 61. The other, eleventh sprocket 85 is disposed in the vicinity of the other end B of the main body 2.

[0059] An eleventh roller chain 86 is looped between the pair of eleventh sprockets 84, 85. The eleventh roller chain 86 has both ends fixed to both ends in the X-axis direction of the fourth trolley 8 by adjuster bolts that can adjust the length of the chain.

[0060] The operation of the hoisting beam device 1 according to this embodiment configured as above will be described. When the overall length of the suspension beam device 1 is extended or shortened, the driving force of the drive unit 20 is distributed and transmitted to the first extension unit 3, the second extension unit 4, the first trolley 5, and the second trolley 6, and the first trolley 5 and the second trolley 6 move in accordance with the movement of the first extension unit 3 and the second extension unit 4, just like in the first embodiment.

[0061] In addition, when the overall length of the suspension beam device 1 is extended, when the drive unit sprocket 24 rotates to the right by the drive unit 20 as described above, that rotation is transmitted to one of the fifth sprockets 90 of the transmission unit 30, which is arranged coaxially with the drive unit sprocket 24, causing the one of the fifth sprockets 90 to rotate to the right. When one fifth sprocket 90 rotates clockwise, the circular fifth roller chain 92 is fed clockwise, causing the other fifth sprocket 91 to rotate clockwise.

[0062] When the other fifth sprocket 91 rotates to the right, the rotation is transmitted to one of the third sprockets 50 that is provided coaxially with the other fifth sprocket 91, causing the one third sprocket 50 to rotate to the right. When one third sprocket 50 rotates clockwise, the circular third roller chain 52 is fed clockwise, causing the other third sprocket 51 to rotate clockwise.

[0063] When the other third sprocket 51 rotates to the right, the rotation is transmitted to the one tenth sprocket 74 that is provided coaxially with the other third sprocket 51, causing the one tenth sprocket 74 to rotate to the right. When one of the tenth sprockets 74 rotates to the right, the circular tenth roller chain 76 is sent in a clockwise direction, causing the other tenth sprocket 75 to rotate to the right, and the third trolley 7, to which both ends of the tenth roller chain 76 are fixed, moves toward one end A of the main body 2 relative to the main body 2.

[0064] In this way, the drive unit 20 functions as a drive unit for moving the third trolley 7. In addition, the transmission unit 30 distributes and transmits the driving force of the drive unit 20 not only to the first trolley 5 but also to the third trolley 7, thereby moving the first trolley 5 and the third trolley 7 in accordance with the movement of the first extension unit 3.

[0065] As described above, the drive unit sprocket 24 rotates to the right by the drive unit 20, and that rotation is transmitted to the other fifth sprocket 91 via the one fifth sprocket 90 and the circular fifth roller chain 92. When the other fifth sprocket 91 rotates to the right, that rotation is transmitted to the one fourth sprocket 60 via gears 53, 62, causing the one fourth sprocket 60 to rotate to the left. When one of the fourth sprockets 60 rotates counterclockwise, the circular fourth roller chain 63 is sent in the counterclockwise direction, causing the other fourth sprocket 61 to rotate counterclockwise.

[0066] When the other, fourth sprocket 61 rotates counterclockwise, the rotation is transmitted to the one, eleventh sprocket 84, which is provided coaxially with the other, fourth sprocket 61, causing the one, eleventh sprocket 84, to rotate counterclockwise. When one of the 11th sprockets 84 rotates to the left, the circular 11th roller chain 86 is sent in a counterclockwise direction, causing the other 11th sprocket 85 to rotate to the left, and the fourth trolley 8, to which both ends of the 11th roller chain 86 are fixed, moves toward the other end B of the main body 2 relative to the main body 2.

[0067] In this manner, the drive unit 20 functions as a drive unit for moving the fourth trolley 8. In addition, the transmission unit 30 distributes and transmits the driving force of the drive unit 20 not only to the second trolley 6 but also to the fourth trolley 8, thereby moving the second trolley 6 and the fourth trolley 8 in accordance with the movement of the second extension unit 4.

[0068] In this embodiment, as described above, the driving force of the drive unit 20 is distributed and transmitted, and the first and second telescopic units 3 and 4 move in opposite directions in synchronization with each other. That is, the first telescopic unit 3 moves to protrude from one end A of the main body unit 2, and in synchronization with this, the second telescopic unit 4 moves to protrude from the other end B of the main body unit 2. In synchronization with this, the first trolley 5 and the third trolley 7 move to one end A of the main body 2, while the second trolley 6 and the fourth trolley 8 move to the other end B of the main body 2.

[0069] On the other hand, when shortening the overall length of the hoisting beam device 1, the motor 21 of the drive unit 20 is rotated in the reverse direction to rotate the output gear 23 counterclockwise, and each sprocket etc. of the transmission unit 30 rotates in the opposite direction. Therefore, the first telescopic section 3 and the second telescopic section 4 each move toward the inside of the main body section 2, and in sync with this, the first trolley 5 and the third trolley 7 move toward the other end B of the main body section 2, and the second trolley 6 and the fourth trolley 8 move toward one end A of the main body section 2.

[0070] As described above, according to the suspension beam device 1 of this embodiment, even if the length of the suspension beam device 1 becomes longer and the number of trolleys is increased, the driving force of one driving unit 20 can be distributed and transmitted by the transmission unit 30, making it possible to move all the trolleys in sync together with the first extension unit 3 and the second extension unit 4. Therefore, even if the number of trolleys increases, there is no need to add additional drive units, making it possible to obtain beneficial effects similar to those of the first embodiment, such as preventing a situation in which the amount of transported load that can be suspended is reduced by the amount of additional drive units added to the suspension beam device 1.

[0071] In this case, for example, by adjusting the number of teeth of each sprocket, it is possible to adjust the amount of movement of the first to fourth trolleys when moving the first telescopic section 3 or the second telescopic section 4. Therefore, it is possible to move the multiple first to fourth trolleys provided on the main body 2 and the electromagnets 9 suspended below one end 3a of the first extension section 3 and one end 4a of the second extension section 4 at approximately equal intervals in accordance with the movement of the first extension section 3 and the second extension section 4.

[0072] With this configuration, it becomes possible for each electromagnet 9 to be magnetically attracted to the transported load 10 at approximately equal intervals, so that the lifting force of each electromagnet 9 is applied to the transported load 10 approximately evenly, enabling the lifting beam device 1 to stably lift the transported load 10.

[0073] In the above first and second embodiments, the transmission unit 30 is provided with a first sprocket 31 (sprocket for the extension unit) for transmitting the driving force of the drive unit 20 to the first extension unit 3, and a fifth sprocket 90 (sprocket for the trolley) for transmitting the driving force of the drive unit 20 to the first trolley 5, and a case has been described in which the first sprocket 31 and the fifth sprocket 90 are arranged coaxially (see Figures 1 to 3).

[0074] With this configuration, when the driving force of the driving unit 20 is transmitted to the rotating shaft, it is transmitted coaxially to the first sprocket 31 and the fifth sprocket 90. As a result, the mechanism for distributing and transmitting the driving force of the drive unit 20 to the first telescopic unit 3 and the first trolley 5 can be constructed using only the rotating shaft, the first sprocket 31 (sprocket for the telescopic unit), and the fifth sprocket 90 (sprocket for the trolley), and since no other parts are required, it is possible to prevent an increase in the number of parts.

[0075] On the other hand, it is also possible to configure the first sprocket 31 (sprocket for the telescopic portion) and the fifth sprocket 90 (sprocket for the trolley) to be provided on different shafts. In this case, for example, as shown in Figure 4, a pair of twelfth sprockets 94, 95 are newly provided, with one of the twelfth sprockets 94 being provided coaxially with the first sprocket 31 (the sprocket for the telescopic section). The other twelfth sprocket 95 can be provided coaxially with a separate fifth sprocket 90 (the sprocket for the trolley), and a circular twelfth roller chain 96 can be stretched between the pair of twelfth sprockets 94, 95.

[0076] With this configuration, it is possible to adjust the number of teeth between the first sprocket 31 (sprocket for the telescopic section) and the fifth sprocket 90 (sprocket for the trolley), the twelfth sprocket 94 on one side, and the twelfth sprocket 95 on the other side. Therefore, it becomes easier to adjust the amount of movement of the first telescopic section 3 (and the second telescopic section 4) and the amount of movement of the first trolley 5 (and other trolleys).

[0077] It goes without saying that the present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0078] 1. Lifting beam device 2 Main unit 3 1st telescopic part 4 2nd telescopic part 5 1st trolley (1st trolley, multiple trolleys) 6 Second trolley (second trolley, multiple trolleys) 7 3rd trolley (multiple trolleys) 8 4th trolley (multiple trolleys) 9. Electromagnets 20 Drive unit 30 Transmission section 31 First sprocket (sprocket for telescopic section) 90 5th sprocket (trolley sprocket) A One end of the main body B. The other end of the main body (the end of the main body opposite the first telescopic part)

Claims

1. An elongated main body portion; A first expandable portion is provided at one end side of the main body portion so as to be movable in a longitudinal direction of the main body portion relative to the main body portion; a first trolley supported on the main body so as to be movable in a longitudinal direction of the main body relative to the main body; A drive unit for moving the first telescopic unit and the first trolley; A transmission unit that distributes and transmits the driving force of the driving unit to the first telescopic unit and the first trolley to move the first telescopic unit and the first trolley; Equipped with The transmission unit includes a telescopic unit sprocket for transmitting the driving force of the drive unit to the first telescopic unit, and a trolley sprocket for transmitting the driving force of the drive unit to the first trolley, and the telescopic unit sprocket and the trolley sprocket are coaxially provided. Lifting beam device.

2. The first trolley is provided at a lower part of the main body, the driving unit is provided at an upper part of the main body, and the transmission unit is provided at a position closer to the driving unit than the first trolley. The suspension beam device according to claim 1.

3. Further comprising a tensioning bracket for applying tension to the roller chain hung on the trolley sprocket. The hoisting beam device according to claim 1 or 2.

4. A second expandable section is provided at an end side of the main body portion opposite to the first expandable section and is movable in a longitudinal direction of the main body portion relative to the main body portion; a second trolley supported on the main body so as to be movable in a longitudinal direction of the main body relative to the main body; Equipped with The transmission unit distributes and transmits the driving force of the drive unit to the second telescopic unit and the second trolley to move the second telescopic unit and the second trolley. A hoisting beam device according to any one of claims 1 to 3.

5. An electromagnet is suspended from each of the trolleys provided in the main body, the first telescopic section, and the second telescopic section, The electromagnet moves at approximately equal intervals in accordance with the movement of the first extension / retraction section and the second extension / retraction section. The hoisting beam device according to claim 4.

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