Lifting machine

Abstract

To provide an advantageous lifting machine for reducing burden on a worker who lifts and suspends suspended loads.SOLUTION: In a lever mechanism 36, an oscillation center of a main arm 40 is a fulcrum P1, a point of action P2 is on the point where a lifting wire 30 is joined to a guide arm 4002 for a lifting wire movement, and a force point P3 is on the point where a traction wire 32 is joined to a guide arm 4004 for a traction wire movement. The lever mechanism 36 constitutes a second-class lever mechanism 36A at the standby position of a hanging tool 38. The lever mechanism 36 is converted to a third-class lever mechanism 36B from the second-class lever mechanism 36A when a reducing lever 3802 of the hanging tool 38 in the standby position is grasped.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a lifting machine for lifting a load. [Background technology]

[0002] Conventionally, there has been provided a lifting machine that includes a support pillar attached to a movable platform, a boom extending horizontally from the support pillar, a wire suspended from the tip of the boom and having a hook at its lower end for suspending a load, and a motor that lifts and lowers the load by winding and unwinding the wire (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-201694 Summary of the Invention [Problem to be solved by the invention]

[0004] Such conventional lifting machines have the problem that they are large-scale and costly because they require a motor. The present invention has been developed in consideration of the above circumstances, and its object is to provide a lifting machine that is advantageous in reducing the burden on workers who lift and lower loads, while simplifying the configuration and reducing costs. [Means for solving the problem]

[0005] In order to achieve the above object, the lifting machine of the present invention comprises a boom provided at a position above a floor surface, a lifting wire that hangs down from the tip of the boom and has a suspending tool attached to the tip, a spring balancer that is provided on the boom and constantly pulls a traction wire, and a lever mechanism provided on the boom, the lever mechanism comprising a main arm that is provided on the boom and swingably supported by a support shaft that constitutes a fulcrum, a base end of the lifting wire that is connected movably in the extension direction of the main arm and constitutes a point of application, and a spring balancer that is provided on the main arm and supports the main arm. and a tip of the pulling wire which is movably connected in the extension direction of the arm and constitutes a force point, the suspending device is located at a standby position above the floor surface when not in use, the leverage mechanism constitutes a second type of leverage mechanism in which the point of application is farther from the fulcrum than the point of application is at the standby position of the suspending device, and a mechanism for moving the point of application and point of force is provided which converts the lever mechanism from the second type to a third type of lever mechanism by making the distance between the point of application and the fulcrum greater than the distance between the point of application and the fulcrum at the standby position of the suspending device. Effect of the Invention

[0006] In the present invention, an operator pushes the suspending tool downward from the standby position, and then raises and lowers the suspending tool below the standby position to move the suspended load. According to the present invention, the lever mechanism is converted from a second type lever mechanism to a third type lever mechanism at the standby position, which significantly increases the attenuation range of the force required to raise and lower the suspending device compared to when the lever mechanism is composed only of a third type lever mechanism. In particular, it makes it possible to raise and lower the suspending device with a load suspended therefrom, or to raise and lower the load suspended by the suspending device, with less force, which is advantageous in significantly reducing the burden on workers. [Brief description of the drawings]

[0007] [Figure 1] This is an oblique view showing a state in which the boom is in the retracted position, the storage box is located above the storage space, and the work cart and transport cart are located in front of the work space. [Diagram 2] This is a perspective view showing a state in which the boom is in an extended position, the storage box is located above the work space, and the work cart and the transport cart are located in front of the work space. [Diagram 3] 13 is a plan view of the lever mechanism in a state where the main arm is located at an initial swing position. FIG. [Figure 4] 13 is a plan view of the lever mechanism in a state where the main arm is located at the initial swing position, grips the hanging tool reducing lever, and the application point / force point moving arm is swung. FIG. [Diagram 5] 13 is a plan view of the lever mechanism in a state in which the hanging tool is pushed down and the main arm has swung from the initial swing position. FIG. [Figure 6] FIG. 11 is a side view showing the state in which the boom is in the retracted position and the storage box is located above the storage space. [Figure 7] 13 is a side view showing the state in which the boom has been extended from the retracted position to the extended position and the storage box has been moved from the storage space onto the work space. FIG. [Figure 8] 11 is a side view showing a state in which the boom has been returned from the extended position to the retracted position and the tool has been lowered from the retracted position to a standby position for use. FIG. [Figure 9] 1A is a cross-sectional rear view of a state in which a pin provided on the storage frame protrudes into the storage box frame, and FIG. 1B is a cross-sectional rear view of a state in which the pin provided on the storage frame protrudes into the underside of the storage box frame, maintaining the inclined state of the storage box frame. [Figure 10] FIG. 13 is an explanatory diagram of a cover plate opening interlocking mechanism. [Figure 11] 13 is an explanatory diagram of a second cover plate opening interlocking mechanism. FIG. [Figure 12] FIG. 1 is an explanatory diagram of a pin provided on a storage box frame and the first cover plate (second cover plate), where (A) to (C) show the first cover plate (second cover plate) in a closed position, and (D) to (F) show the first cover plate (second cover plate) in an open position, where (A) and (D) are side views, (B) and (E) are plan views, and (C) and (F) are rear views. [Figure 13] 13(A) to 13(F) are explanatory diagrams showing the suspended state of the second tool and the third tool. [Figure 14]5A and 5B are explanatory diagrams of the tool lowering interlocking mechanism and the second tool lifting mechanism, in which (A) shows the movable tool storage unit in its initial position, and (B) shows the movable tool storage unit in its swung state. [Figure 15] 5A and 5B are explanatory diagrams of the tool lowering interlocking mechanism and the third tool lifting mechanism, in which (A) shows the movable tool storage unit in its initial position, and (B) shows the movable tool storage unit in its swung state. [Figure 16] 13 is an explanatory diagram of a storage box return interlocking mechanism. FIG. [Figure 17] FIG. 4 is an explanatory diagram of a pin removal mechanism. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, the suspended load is a heavy transfer 10, and a case will be described in which this transfer 10 is attached to an engine 12. However, the application of the present invention is not limited to this embodiment, and the present invention can be applied to various applications for various suspended loads. As shown in FIG. 1, a storage box 18 containing several types of bolts and tools used when assembling the transfer 10 to the engine 12 is disposed in a storage space 16 behind a work space 14 in which the transfer 10 is assembled to the engine 12. A lifting machine 20 is provided on the side of the storage box 18. A work cart 22 on which the engine 12 is mounted is located in front of the work space 14. A transport cart 24 on which a plurality of transfers 10 are placed is positioned so that a portion of the transport cart 24 overlaps with the work cart 22 in the front-to-rear direction of the work space 14 .

[0009] First, the lifting machine 20 will be described. As shown in Figures 1 and 3(A), the lifting machine 20 includes a pillar 26 that rises from the floor surface, a boom 28 supported by the pillar 26, a lifting wire 30, a traction force wire 32 (see Figure 4(A)), a spring balancer 34 that constantly pulls the traction force wire 32, and a lever mechanism 36. The boom 28 is supported by a bearing portion 2602 at the upper portion of the support column 26 so as to be movable in its longitudinal direction. In detail, the tip of the boom 28 is supported so as to be movable between a retracted position located above the rear of the work space 14 and an extended position located above the transport cart 24 and the work cart 22, and is biased by a coil spring (not shown) to keep it in the retracted position at all times. The lifting wire 30 is hung around a pulley 2802 at the tip of the boom 28 and hangs down from the tip of the boom 28, and a hanging device (hook) 38 is attached to the tip of the lifting wire 30. As shown in FIG. 3(B), the suspender 38 is provided with a grippable lightening lever 3802.

[0010] As shown in FIG. 3(A), the spring balancer 34 is attached to the base end of the boom 28 via a bracket 2804. As shown in FIG. 4(A), a winding shaft (not shown) around which the traction wire 32 is wound is provided inside the spring balancer 34, and the traction wire 32 is constantly pulled in the direction in which it is wound around the winding shaft. In this embodiment, the weight of the transfer 10 is 16 kg and the tractive force is 20 kg. A stopper 3202 and a traction hook 3204 are provided at the tip of the traction wire 32, and when no load is applied to the traction hook 3204, the stopper 3202 abuts against the entrance / exit of the traction wire 32 in the case 3402 of the spring balancer 34. Therefore, when the stopper 3202 abuts against the entrance / exit of the traction wire 32 of the case 3402 of the spring balancer 34, the suspending device 38 is in its upper limit position, and this upper limit position of the suspending device 38 is the standby position in which the suspending device 38 is located when the hoisting machine 20 is not in use. In this embodiment, a standby position stopper that stops the suspending tool 38 at a standby position above the floor surface when the hoisting machine 20 is not in use is composed of a stopper 3202 provided at the tip of the traction wire 32.

[0011] The lever mechanism 36 adjusts the force required to lower the suspending tool 38 alone from the standby position and the force required to raise and lower the suspending tool 38 with a heavy load suspended therefrom or the heavy load suspended by the suspending tool 38 so that they are small. As shown in FIG. 3(A), the lever mechanism 36 includes a main arm 40 supported by a main arm support shaft 42 so as to be swingable within a horizontal plane. The main arm 40 may be composed of a single arm, but in this embodiment, the main arm 40 is composed of two arms, a guide arm 4002 for moving the lifting wire and a guide arm 4004 for moving the traction wire, which face each other and swing together, which is advantageous for smooth movement of the point of action and the point of effort described below. The base of the guide arm 4002 for moving the lifting wire and the base of the guide arm 4004 for moving the traction force wire are connected by a first base plate 44 which is supported for swinging by the main arm support shaft 42, the tip of the guide arm 4002 for moving the lifting wire and the tip of the guide arm 4004 for moving the traction force wire are connected by a curved portion, and the guide arm 4004 for moving the traction force wire is positioned closer to the spring balancer 34 than the guide arm 4002 for moving the lifting wire. The main arm support shaft 42 is supported non-rotatably by the boom 28 via a bracket 46 and a second base plate 48 .

[0012] A pulley for the lifting wire 3006 is provided at the base end of the lifting wire 30 via an attachment 3002 and a first pulley bracket 3004, and the pulley for the lifting wire 3006 is movably engaged with a guide arm for moving the lifting wire 4002. Therefore, the base end of the lifting wire 30 is coupled to the guide arm for moving the lifting wire 4002 so as to be movably connected in the extension direction. Further, a traction wire pulley 3208 is provided on the traction hook 3204 at the base end of the traction wire 32 via a second pulley bracket 3206, and the traction wire pulley 3208 is movably engaged with the traction wire moving guide arm 4004. Therefore, the tip of the traction wire 32 is coupled to the traction wire moving guide arm 4004 movably in the extension direction.

[0013] FIG. 3(A) shows the swing posture of the main arm 40 when the suspending tool 38 is located at the standby position, and this swing posture of the main arm 40 is the initial swing position of the main arm 40. In addition, the positions of the base end of the lifting wire 30, the first pulley bracket 3004, and the pulley 3006 for the lifting wire, and the positions of the tip of the traction force wire 32, the second pulley bracket 3206, and the pulley 3208 for the traction force wire shown in Figure 3 (A) are their initial positions when the main arm 40 is located in the initial swing position. At the initial swing position, the main arm 40 extends in a direction substantially perpendicular to the longitudinal direction of the boom 28 . As shown in FIG. 3(A), a lower limit position stopper 3008 is provided to determine the lower limit position of the suspending tool 38 below the standby position. The lower limit position stopper 3008 is composed of a movable abutment plate 3008A that is attached to the lifting wire 30 and moves integrally with the lifting wire 30, and a fixed abutment plate 3008B that is attached to the boom 28 and can abut against the movable abutment plate 3008A. In this embodiment, since the transfer 10 placed on the transport cart 24 is lifted and assembled to the engine 12 on the work cart 22, the lower limit position of the hanging tool 38 is a position slightly below the position at which the hanging tool 38 at the end of the lifting wire 30 can be engaged with the engaging portion of the transfer 10.

[0014] When the suspending device 38 is pushed down from the standby position, as shown in Figures 3 to 5, in the lever mechanism 36, a force acts from the pulley 3006 for the lifting wire to the guide arm 4002 for moving the lifting wire, causing the main arm 40 to swing from the initial swing position toward the tip of the boom 28 around the main arm support shaft 42, and the main arm 40 continues to swing until the suspending device 38 reaches the lower limit position. As the main arm 40 swings, the pulley 3006 for the lifting wire moves along the guide arm 4002 for moving the lifting wire in a direction away from the main arm spindle 42, and the pulley 3208 for the traction wire moves along the guide arm 4004 for moving the traction wire in a direction approaching the main arm spindle 42. In addition, when the hand is released from the suspension device 38, a force acts from the pulley 3208 for the traction wire to the guide arm 4004 for moving the traction wire, causing the main arm 40 to swing toward the initial swing position. As the main arm 40 swings, the pulley 3006 for the lifting wire moves along the guide arm 4002 for moving the lifting wire toward the main arm spindle 42, and the pulley 3208 for the traction wire moves along the guide arm 4004 for moving the traction wire in a direction away from the main arm spindle 42. Then, when the suspending tool 38 returns to the standby position, the main arm 40 returns to the initial swing position, and the hoisting wire pulley 3006 and the traction wire pulley 3208 return to their initial positions.

[0015] As shown in FIG. 3(A), in the lever mechanism 36, the swing center of the main arm 40 (the center of the main arm spindle 42) is the fulcrum P1, the point where the lifting wire 30 (lifting wire pulley 3006) is connected to the lifting wire moving guide arm 4002 is the action point P2, and the point where the traction force wire 32 (traction force wire pulley 3208) is connected to the traction force wire moving guide arm 4004 is the force point P3. As shown in FIG. 3(A), in the initial swing position of main arm 40 with suspending device 38 located in the standby position, point of application P2 and point of force P3 are located close to each other in the longitudinal direction of main arm 40, and lever mechanism 36 constitutes a second type of lever mechanism 36A in which the distance between point of application P3 and fulcrum P1 is greater than the distance between point of application P2 and fulcrum P1, and a large force is required to push down suspending device 38 located in the standby position. Therefore, in this embodiment, at the standby position of the suspending tool 38, a mechanism for moving the point of action / force 37 is provided which converts the lever mechanism 36 from the second type lever mechanism 36A to the third type lever mechanism 36B, as shown in FIG. 4. The mechanism for moving the point of application / force 37 includes a lightening lever 3802, an arm for moving the point of application / force 48, a cable 50, and the like. In other words, a grippable lightening lever 3802 is provided on the hanging device 38, and when the lightening lever 3802 is gripped with the hanging device 38 in the standby position, the action point / force point moving arm 48 is swung via the cable 50 in conjunction with the gripping of the lightening lever 3802, so that the distance between the action point P2 and the fulcrum P1 is made greater than the distance between the force point P3 and the fulcrum P1, and the lever mechanism 36 is converted from the second type lever mechanism 36A to the third type lever mechanism 36B, as shown in Figures 3(A) to 4(A). Although the lightening lever 3802 may be provided at a location other than the hanging device 38, providing the lightening lever 3802 in a grippable manner on the hanging device 38 is advantageous in easily converting the lever mechanism 36 from the second type lever mechanism 36A to the third type lever mechanism 36B.

[0016] The arm 48 for moving the point of force of application comprises a J-shaped arm body 4804 which can swing around a support shaft 4802 for the arm for moving the point of force of application provided on the main arm 40, and an auxiliary rod 4806 which protrudes from the arm body 4804 and is integrated with the arm body 4804. The arm main body 4804 has a curved portion 4804A and a straight portion 4804B, and as shown in FIG. 4(A), the tip of the curved portion 4804A is configured so as to be able to abut against the side portion of the first pulley bracket 3004, and the straight portion 4804B is configured so as to be able to abut against the towing hook 3204 and the second pulley bracket 3206. The lightening lever 3802 and the action point / force point moving arm 48 are connected via a cable 50 . When the main arm 40 is in the initial swing position, the arm 48 for moving the load point / force point is in its initial position with the tip of the curved portion 4804A abutting the side of the first pulley bracket 3004 and the straight portion 4804B abutting the end of the second pulley bracket 3206.

[0017] As shown in FIG. 3(A), the cable 50 includes a cable outer 5002 and a cable inner 5004. One end of the cable outer 5002 is attached to a bracket 3804 directly above the relief lever 3802, as shown in FIG. 3(B), and the other end of the cable outer 5002 is attached via an attachment device 5202 to the tip of the fixed arm 52 fixed to the support shaft 4802 for the arm for moving the action point / force point, as shown in FIG. 3(A). One end of the cable inner 5004 is attached to the lightening lever 3802 as shown in FIG. 3(B), and the other end of the cable inner 5004 is attached to the auxiliary rod 4806 via an attachment 4808 as shown in FIG. 3(A).

[0018] Also, as shown in FIG. 3(A), a pair of guide members 54, 56 are provided between the lifting wire pulley 3006 and the traction wire pulley 3208, and the pair of guide members 54, 56 extend along the boom 28 while facing each other. Of the pair of guide members 54, 56, the guide member 54 located closer to the main arm spindle 42 is supported via a second base plate 48 attached to the main arm spindle 42, and the other guide member 56 is supported by the boom 28 via a bracket not shown. An end portion of one guide member 54 remote from the spring balancer 34 is formed as a curved guide 5402, and an auxiliary pulley 58 is movably provided on this curved guide 5402. An auxiliary coil spring 60 for the lifting wire is provided between the pulley bracket 5802 of this auxiliary pulley 58 and the base end of the lifting wire 30 , and biases the base end of the lifting wire 30 in the direction of the main arm support shaft 42 . In addition, an auxiliary coil spring 62 for the traction wire is provided between the other guide member 56 and the traction hook 3204 at the tip of the traction wire 32, and urges the tip of the traction wire 32 in a direction away from the main arm support shaft 42.

[0019] These auxiliary coil springs 60, 62 prevent rattling of the pulley 3006 for the lifting wire and the pulley 3208 for the traction wire, which engage with the main arm 40, and also function to ensure that the base end of the lifting wire 30, the first pulley bracket 3004, the pulley 3006 for the lifting wire, the tip of the traction wire 32, the second pulley bracket 3206, and the pulley 3208 for the traction wire return to their initial positions. Further, a first pulley 64 and a second pulley 66 are disposed on both sides of the main arm 40 near the main arm support shaft 42 and supported by the boom 28 via a bracket (not shown). An auxiliary wire 68, one end of which is attached to a bracket 5802 of an auxiliary pulley 58 that is movably arranged on one of the guide members 54, is hung between the second pulley 66 and the first pulley 64, and the other end of the auxiliary wire 68 is attached to the tip of an auxiliary rod 4806. The auxiliary wire 68 and the auxiliary pulley 58 apply tension to the cable inner 5004 at the initial positions of the pulley 3006 for the lifting wire and the pulley 3208 for the traction wire. In addition, when the application point force point moving arm 48 swings by gripping the reduction lever 3802, the auxiliary wire 68 and auxiliary pulley 58 constitute a wire pulley mechanism which, when the pulley 3006 for the lifting wire and the pulley 3208 for the traction wire are in their initial positions, forcibly pulls the auxiliary wire 68 out of the first pulley 64 by the auxiliary rod 4806, as shown in FIG. 4(A), and moves the auxiliary pulley 58 along the curved portion 4804A in a direction away from the spring balancer 34 via the second pulley 66 and the auxiliary wire 68, thereby shortening the distance between the auxiliary pulley 58 and the pulley 3006 for the lifting wire, thereby weakening the elastic force of the auxiliary coil spring 60 for the lifting wire, and making it easier to move the pulley 3006 for the lifting wire in a direction away from the main arm support shaft 42.

[0020] Next, a method of using the lifting machine 20 according to this embodiment and its functions and effects will be described. When assembling the transfer 10, which is a heavy suspended load placed on the transport cart 24, to the engine 12 placed on the work cart 22, the boom 28 is pulled out from the retracted position to the extended position, and the tip of the boom 28 is positioned above the transport cart 24, as shown in FIG. 2. In this state, the suspending tool 38 is in the standby position, and as shown in FIG. 3(A), the main arm 40 is in the initial swing position, and the lever mechanism 36 constitutes a second type lever mechanism 36A. Next, the lightening lever 3802 of the suspending tool 38 located at the standby position is grasped, and the suspending tool 38 is pushed downward from the standby position. As shown in Figures 3(A) and 4(A), when the hanging device 38 is in the standby position, the main arm 40 is in the initial swing position, and therefore, when the reduction lever 3802 is gripped, the tip of the curved portion 4804A of the arm 48 for moving the action point / force point moves the first pulley bracket 3004 in a direction away from the fulcrum P1, and the straight portion 4804B of the arm 48 for moving the action point / force point moves the second pulley bracket 3206 in a direction toward the fulcrum P1, so that the distance between the action point P2 and the fulcrum P1 becomes greater than the distance between the force point P3 and the fulcrum P1, and the lever mechanism 36 is converted from the second type lever mechanism 36A to the third type lever mechanism 36B. Therefore, the suspension tool 38 can be easily pushed down with a force smaller than the force that the spring balancer 34 exerts on the traction wire 32.

[0021] As shown in Figures 4(A) and 5(A), when the suspension device 38 is pushed down, the main arm 40 tilts from the initial swing position toward the tip of the boom 28, and the pulley 3006 for the lifting wire and the pulley 3208 for the traction wire move on the guide arm 4002 for moving the lifting wire and the guide arm 4004 for moving the traction wire along the inclination of the main arm 40. That is, in the third type lever mechanism 36B, the pulley 3006 for the lifting wire which constitutes the point of action P2 gradually moves away from the fulcrum P1, the pulley 3208 for the traction wire which constitutes the point of force P3 gradually moves closer to the fulcrum P1, and the first pulley bracket 3004 and the second pulley bracket 3206 move away from the arm 48 for moving the point of action / force. The lightening lever 3802 only needs to be temporarily gripped when the suspending tool 38 is pushed downward from the standby position. Furthermore, as the hanging device 38 is pushed down, the difference between the distance between the point of action P2 and the fulcrum P1 and the distance between the point of force P3 and the fulcrum P1 gradually increases, so that the force required to push down the hanging device 38 gradually decreases as the hanging device 38 is pushed down.

[0022] Once the suspending tool 38 has been engaged with the engaging portion of the transfer 10, the suspending tool 38 suspending the transfer 10 is pulled up, or the transfer 10 suspended by the suspending tool 38 is lifted up and moved to the mounting location of the engine 12 on the work cart 22. Then, the transfer 10 is aligned with the mounting location of the engine 12 on the work platform 22, and the transfer 10 is attached to the engine 12 using multiple types of fasteners such as bolts. In this case, since the hanging device 38 is located near the lower limit position, as shown in FIG. 5(A), in the third type lever mechanism 36B, the difference between the distance between the point of action P2 and the fulcrum P1 and the distance between the point of force P3 and the fulcrum P1 is large. Therefore, the force required to raise and lower the hanging device 38 hanging the transfer 10, or the force required to hold and raise and lower the transfer 10 suspended by the hanging device 38, is small, which is advantageous in terms of simplifying the assembly of the transfer 10.

[0023] When the installation of the transfer 10 is completed, or even before the installation of the transfer 10 is completed, when the transfer 10 is firmly installed to the engine 12, the suspending tool 38 is removed from the locked portion of the transfer 10, and the hands are released from the transfer 10. When the transfer 10 is released, the main arm 40 returns to its initial swing position because it is being pulled by the traction wire 32, and the base end of the lifting wire 30, the first pulley bracket 3004, the pulley 3006 for the lifting wire, the tip of the traction wire 32, the second pulley bracket 3206, the pulley 3208 for the traction wire, and the arm 48 for moving the action point / force point return to their initial positions, and as shown in FIG. 3(A), the lever mechanism 36 is converted from the third type lever mechanism 36B to the second type lever mechanism 36A, and the hanging device 38 returns to its standby position. The operator then pushes the boom 28 back to its original position, as shown in FIG. Therefore, according to this embodiment, when the hanging tool 38 is in the standby position, the lever mechanism 36 is converted from the second type lever mechanism 36A to the third type lever mechanism 36B, which significantly increases the attenuation of the force required to raise and lower the hanging tool 38 compared to when the lever mechanism 36 is configured only with the third type lever mechanism 36B. In particular, the lifting and lowering of the hanging tool 38 with the transfer 10 suspended from it as a load, or the lifting and lowering of the transfer 10 suspended by the hanging tool 38, can be performed with less force, which is advantageous in significantly reducing the burden on the worker and in making the installation work of the transfer 10 efficient and simple.

[0024] Next, the storage box 18 for storing fasteners such as bolts, which is disposed on the side of the lifting machine 20, will be described. As shown in FIGS. 6 to 8, a storage frame 70 is arranged in the storage space 16 on the side of the lifting machine 20. A storage box 18 is arranged on the storage frame 70 so as to be removable from above the work space 14. As shown in Figures 1, 2 and 14, the storage box 18 is composed of a movable tool storage section 1802 which stores a first tool 74A for fastening a first fastener and is movable about a support shaft 1804 on the storage box frame 72 and biased to an initial position by a spring 1806, a first storage box 1810A which stores the first fastener and has a first cover plate 1812A which can be opened and closed, and a second storage box 1810B which stores a second fastener and has a second cover plate 1812B which can be opened and closed. In this embodiment, the movable tool storage unit 1802 is of a swinging type, but any type of movement may be adopted, such as a vertical movement type. As shown in Figures 6 and 13(A), above the work space 14, a second tool 74B for fastening the second fastener and a third tool 74C for checking the fastening state of the second fastener are suspended in retracted positions via a first wire 76A and a second wire 76B, respectively. The third tool 74C is the last tool used when assembling the transfer 10 to the engine 12. An auxiliary device is provided for efficiently assembling the transfer 10 to the engine 12, and the auxiliary device is configured to include at least one of a storage box protruding interlocking mechanism 78, a cover plate opening interlocking mechanism 80, a second cover plate closing interlocking mechanism 82, a first cover plate closing interlocking mechanism 84, a second cover plate opening interlocking mechanism 86, a tool lowering interlocking mechanism 88, a second cover plate final closing interlocking mechanism 90, a second tool lifting mechanism 92, a third tool lifting mechanism 96, and a storage box return interlocking mechanism 94.

[0025] As shown in FIGS. 6 to 8, the storage box protruding interlocking mechanism 78 moves the storage box 18 from the storage space 16 to the working space 14 in conjunction with the movement of the boom 28 from the retracted position to the protruding position. As shown in FIG. 6 , the storage box frame 72 is supported by the storage frame 70 so as to be tiltable around a fulcrum 73, and the storage box 18 has a plurality of wheels 1820 and is moved in and out of the storage box frame 72 via a guide rod 7202 and a slider 7204. The storage box protruding linkage mechanism 78 has an arm 7802 that is swingably supported by the storage frame 70 via a support shaft and has one end connected to the boom 28 via a pin and a long hole. One end of a wire 7804 is attached to the other end of the arm 7802 , and the other end of the wire 7804 is attached to the storage box frame 72 via a pulley 7806 . Therefore, when the boom 28 is pulled out from the retracted position to the extended position as shown in Figures 6 and 7, the rear end of the storage box frame 72 is tilted higher than the front end, and the storage box 18 is moved from the storage space 16 to the work space 14 along the guide rod 7202. As shown in Figure 9(A), when the rear end of the storage box frame 72 rises, the pin 7810 is pushed from the inside of the storage frame 70 to the outside, and when the storage box frame 72 is positioned above the pin 7810, the pin 7810 protrudes into the inside of the storage frame 70 due to the biasing force of the coil spring 7812, and the tilted state of the storage box frame 72 is maintained as shown in Figure 9(B). Incidentally, an inclined surface 7810A is provided on the lower surface of the pin 7810, and when the storage box frame 72 rises, the pin 7810 is recessed by the storage box frame 72, allowing the storage box frame 72 to rise. By providing a storage box protruding interlocking mechanism 78, the storage box 18 is positioned above the work space 14 only when it is in use, and is retracted from the work space 14 when it is not in use, thereby making the assembling work of the transfer 10 more efficient.

[0026] The cover plate opening interlocking mechanism 80 swings the first cover plate 1812A and the second cover plate 1812B from the closed position to the open position around the support shaft 1813 in conjunction with the movement of the boom 28 from the retracted position to the extended position. Two cover plate opening interlocking mechanisms 80 are provided, one for each of the first cover plate 1812A and the second cover plate 1812B, and these cover plate opening interlocking mechanisms 80 have the same structure. Therefore, with reference to Figure 10, a description will be given of the case where the first cover plate 1812A is swung from the closed position to the open position in conjunction with the movement of the storage box 18 from the storage space 16 to the work space 14. As described above, the storage box 18 moves from the storage space 16 to the work space 14 in conjunction with the movement of the boom 28 from the retracted position to the extended position, and in this embodiment, the first cover plate 1812A and the second cover plate 1812B are swung from the closed position to the open position in conjunction with the movement of the storage box 18 from the storage space 16 to the work space 14. The cover plate opening interlocking mechanism 80 comprises a first arm 8002 swingably supported by a spindle 8004 on the first storage box 1810A (second storage box 1810B), a second arm 8006 swingably supported by a spindle 8008 on the first storage box 1810A (second storage box 1810B) and connected to the first arm 8002 via a pin and long hole not shown in the figure and capable of abutting the first cover plate 1812A (second cover plate 1812B), and a wire 8010 having one longitudinal end attached to the first arm 8002.

[0027] The other longitudinal end of the wire 8010 is attached to the storage box frame 72, and when the storage box 18 approaches the limit of movement position where it is moved from the storage space 16 to the work space 14, the wire 8010 becomes taut, and the tautness of the wire 8010 causes the first arm 8002 to swing the second arm 8006, and the second arm 8006 swings the first cover plate 1812A (second cover plate 1812B) from the closed position to the open position. As shown in FIG. 12, a pin 8012 is arranged on the storage box frame 72 while being biased by a coil spring 8014 in a direction protruding from the rear of the first cover plate 1812A (second cover plate 1812B) at the rear of the support shaft 1813. 12(A) to (C) show the first cover plate 1812A (second cover plate 1812B) in the closed position, and (D) to (F) show the open position. As shown in Figures 12(C) and (F), the tip of this pin 8012 is formed by a conical surface 8012A, and when the first cover plate 1812A (second cover plate 1812B) is in the closed position, the upper part of the conical surface 8012A abuts against the underside of the rear part of the first cover plate 1812A (second cover plate 1812B), and when the first cover plate 1812A (second cover plate 1812B) is in the open position, the lower part of the conical surface 8012A abuts against the upper surface of the rear part of the first cover plate 1812A (second cover plate 1812B). When the first cover plate 1812A (second cover plate 1812B) is forcibly swung between the closed position and the open position, the pin 8012 retracts once and, after the first cover plate 1812A (second cover plate 1812B) has passed, the pin 8012 protrudes again and holds the first cover plate 1812A (second cover plate 1812B) in the closed position and the open position. In other words, the pin 8012 allows the first cover plate 1812A (second cover plate 1812B) to be forcibly swung between the closed position and the open position. By providing the cover plate opening interlocking mechanism 80, the operation of opening the first cover plate 1812A (second cover plate 1812B) can be omitted, which assists the assembly procedure and prevents the first fastener from being mixed up with the second fastener, thereby making the assembly work of the transfer 10 more efficient.

[0028] The second cover plate closing interlocking mechanism 82 is interlocked with the movement of the boom 28 from the extended position to the retracted position, and swings the second cover plate 1812B from the open position to the closed position. As shown in Figure 12 (F), the pin 8012 protrudes from the upper surface of the rear of the second cover plate 1812B, maintaining the second cover plate 1812B in an open state. Therefore, the second cover plate closing interlocking mechanism 82 is composed of a link mechanism (not shown) that is swingably supported on the storage box 18 and connected to the boom 28 via a pin and a long hole, and a wire 8202 that is connected to this link mechanism and is connected to the pin 8012 as shown in Figure 12 (F). In conjunction with the movement of the boom 28 from the extended position to the retracted position, the pin 8012 is pulled out of the storage box 18 via the wire 8202, and the second cover plate 1812B is swung from the open position to the closed position due to its own weight. The worker first removes the fasteners stored in the first storage box 1810A and uses the first tool 74A to assemble the transfer 10. Therefore, by providing the second cover plate closing interlocking mechanism 82, the second storage box 1810B which contains the fasteners not being used can be closed, which is advantageous in ensuring that the assembling work of the transfer 10 is carried out correctly.

[0029] After using the first tool 74A, when the first tool 74A is returned to the mobile tool storage section 1802, the first cover plate closing interlocking mechanism 84 swings the first cover plate 1812A from the open position to the closed position in conjunction with the swinging of the mobile tool storage section 1802 caused by pushing the first tool 74A into the mobile tool storage section 1802, and the mobile tool storage section 1802 is supported on the storage box 18 by a support shaft 1804. The first cover plate closing interlocking mechanism 84 is composed of a movable tool storage section 1802, a link mechanism (not shown) connected to the movable tool storage section 1802, and a wire 8402 connected to the link mechanism and connected to a pin 8012 shown in Figure 12 (F). When the first tool 74A is pushed into the movable tool housing portion 1802, the pin 8012 is pulled out of the first housing box 1810A via the link mechanism and the wire 8402, and the first cover plate 1812A swings from the open position to the closed position due to its own weight. By providing the first cover plate closing interlocking mechanism 84, the first storage box 1810A in which unused fasteners are stored can be closed, which is advantageous in terms of performing the assembling work of the transfer 10 without mistakes.

[0030] The second cover plate opening interlocking mechanism 86 swings the second cover plate 1812B from the closed position to the open position in conjunction with the swinging of the mobile tool storage portion 1802 caused by pushing the first tool 74A into the mobile tool storage portion 1802. As shown in FIG. 11, the second cover plate opening interlocking mechanism 86 includes a third arm 8606 that is swingably supported by a spindle 8602 on the second storage box 1810B and connected to the movable tool storage section 1802 by a wire 8604, and a fourth arm 8610 that is swingably supported by a spindle 8608 on the second storage box 1810B, connected to the third arm 8606 via a pin and a long hole, and can abut against the second cover plate 1812B. In conjunction with the swinging of the movable tool storage section 1802, the fourth arm 8610 swings via the wire 8604 and the third arm 8606, and the fourth arm 8610 swings the second cover plate 1812B from the closed position to the open position. As the second cover plate 1812B swings from the closed position to the open position, the pin 8012 shown in FIG. 12 is temporarily pushed out of the second storage box 1810B, and when the second cover plate 1812B reaches the open position, the pin 8012 protrudes to maintain the open position of the second cover plate 1812B. By providing the second cover plate opening interlocking mechanism 86, the first storage box 1810A in which unused fasteners are stored can be closed, which is advantageous in terms of performing the assembling work of the transfer 10 without mistakes.

[0031] The tool lowering interlocking mechanism 88 shown in Figures 14 and 15 lowers the second tool 74B and the third tool 74C from the retracted position X shown in Figure 13(A) to the standby position Y shown in Figures 8 and 13(B) in conjunction with the swinging of the movable tool storage section 1802 caused by pushing the first tool 74A into the movable tool storage section 1802 when returning the first tool 74A after use. The tool lowering interlocking mechanism 88 raises the second tool 74B and the third tool 74C to a retracted position X where they do not get in the way when they are not in use, and lowers them to a standby position Y where they are easy to grasp when they are in use, thereby making the installation work of the transfer 10 more efficient. FIG. 14 shows a tool lowering interlocking mechanism 88 that lowers the second tool 74B from the retracted position X to the standby position Y in conjunction with the swinging of the movable tool storage unit 1802, and FIG. 15 shows a tool lowering interlocking mechanism 88 that lowers the third tool 74C from the retracted position X to the standby position Y in conjunction with the swinging of the movable tool storage unit 1802. However, since the configurations of these tool lowering interlocking mechanisms 88 are the same, the tool lowering interlocking mechanism 88 will be described with reference to FIG. 14. The tool lowering interlocking mechanism 88 includes a fifth arm 8802 that swings in conjunction with the swing of the movable tool storage section 1802 when the first tool 74A is pushed into the movable tool storage section 1802, a rod 8804 connected to the fifth arm 8802 by a pin, a sixth arm 8806 connected to the rod 8804 via a pin and a long hole and swings in conjunction with the fifth arm 8802, and a seventh arm 8808 connected to the sixth arm 8806 via a pin and a long hole and swings in conjunction with the sixth arm 8806. The fifth arm 8802, the sixth arm 8806, and the seventh arm 8808 are supported by the storage frame 70 so as to be able to swing, and when the storage box 18 moves from the storage space 16 to the work space 14, one end of the fifth arm 8802 is positioned at a location of the movable tool storage section 1802 rearward of the support shaft 1804, and when the storage box 18 moves from the work space 14 to the storage space 16, one end of the fifth arm 8802 moves away from the movable tool storage section 1802. The seventh arm 8808 is provided with a pin 8810 and a spring 8812 that maintain the initial position of the seventh arm 8808 , and a click mechanism 8814 is provided above the pin 8810 .

[0032] Additionally, a wire case 8818 is attached to the seventh arm 8808, in which a first wire 76A for suspending the second tool 74B is housed. As shown in FIG. 14(A), the first wire 76A pulled out from the wire case 8818 is hung on two pulleys 8820, 8822, and the second tool 74B attached to the end of the first wire 76A is suspended at a retracted position X in the work space 14. The length of the first wire 76A unwound from the wire case 8818 is the initial exposed length shown in Figures 14(A) and (B). When the first wire 76A is pulled out from this state and the first wire 76A is released, it is wound up to the initial exposed length and returns to the initial exposed length. 14(B), by pushing the first tool 74A into the movable tool storage section 1802, the seventh arm 8808 swings via the fifth arm 8802, the rod 8804, and the sixth arm 8806, the wire case 8818 rises, and the second tool 74B descends from the retracted position X to the standby position Y. The swinging posture of the seventh arm 8808 is maintained by a click mechanism 8814. The tool lowering interlocking mechanism 88 shown in Figures 15(A) and (B) is similar, except that a third tool 74C is attached to the tip of the second wire 76B, and the third tool 74C is lowered from the retracted position X to a standby position Y. As shown in Figures 13(C) and (D), when using the second tool 74B, the first wire 76A is pulled out from the second tool 74B standby position Y and used, and when the second tool 74B is released after use, the second tool 74B returns to the standby position Y.

[0033] The second tool lifting mechanism 92 lifts the second tool 74B to the retracted position X, as shown in FIG. 13(E), in conjunction with the downward movement of the third tool 74C, which is the last tool to be used during assembly, from the standby position Y. As shown in FIG. 14, the accommodation frame 70 is provided with an eighth arm 9202 that is connected to a seventh arm 8808 via a pin and a long hole. Further, a wire 9206 is connected to the middle portion of the first wire 76A that suspends the third tool 74C via a mounting fixture 9204, and a contact plate 9208 that can contact the eighth arm 9202 is provided on the wire 9206. When the third tool 74C is moved downward from the standby position Y, the abutment plate 9208 abuts against the eighth arm 9202, returning the seventh arm 8808 and the wire case 8818 to their original swing positions, and raising the second tool 74B to the retracted position X. By providing the second tool lifting mechanism 92, the second tool 74B that is no longer in use can be lifted from the standby position to a retracted position, thereby ensuring a larger working space 14, which is advantageous in making the installation work of the transfer 10 efficient and easy.

[0034] As shown in FIG. 15, in the tool lowering interlocking mechanism 88 of the third tool 74C, a ninth arm 9602 coupled to a seventh arm 8808 via a pin and an elongated hole is provided on the storage frame . A wire 9606 is connected to the middle portion of the second wire 76B that suspends the third tool 74C via a mounting fixture 9604, and a contact plate 9608 that can contact the ninth arm 9602 is provided on the wire 9606. When the third tool 74C is moved downward from the standby position Y, the abutment plate 9608 abuts against the ninth arm 9602, returning the seventh arm 8808 and the wire case 8818 to their original swing positions, and after use of the third tool 74C, the third tool 74C rises to the retracted position X and stops there. Therefore, when the third tool 74C is moved downward from the standby position for use and then released from the third tool 74C, a third tool lifting mechanism 96 that lifts the third tool 74C to the retracted position is provided, and is composed of a ninth arm 9602, a wire 9606, and a contact plate 9608. By providing the third tool lifting mechanism 96, the third tool 74C that is no longer in use can be lifted from the standby position to a retracted position, thereby ensuring a larger working space 14, which is advantageous in making the installation work of the transfer 10 efficient and easy.

[0035] The second cover plate final closing interlocking mechanism 90, as shown in FIG. 13(E), swings the second cover plate 1812B from the open position to the closed position in conjunction with the downward movement of the third tool 74C from the standby position Y. As shown in Figures 12(E) and (F), a pin 8012 is positioned on the upper surface of the rear part of the second cover plate 1812B to form an open position of the second cover plate 1812B, and the second cover plate final closing interlocking mechanism 90 is composed of a link mechanism (not shown) connected to the middle part of the second wire 76B that suspends the third tool 74C via a connector (not shown), and a wire 9002 connected to this link mechanism and also to the pin 8012. In conjunction with the downward movement of the third tool 74C from the standby position Y for use, the pin 8012 is pulled out by the wire 9002 via the link mechanism (not shown), and the second cover plate 1812B is swung from the open position to the closed position due to its own weight. By providing the second cover plate final closing interlocking mechanism 90, the second storage box 1810B in which unused fasteners are stored can be closed, which is advantageous in ensuring that the assembling work of the transfer 10 is performed without error.

[0036] As shown in FIG. 16, the storage box returning interlocking mechanism 94 moves the storage box 18 from the working space 14 to the storage space 16 in conjunction with the movement of the third tool 74C further downward from the standby position Y for use. The storage box return interlocking mechanism 94 is composed of a storage box return mechanism 98 that returns the storage box 18 from the work space 14 to the storage space 16, and a pin removal mechanism 100 (see Figure 17) that removes the pin 7810 (see Figure 9) that maintains the inclined state of the storage box frame 72. As shown in FIG. 16, the storage box return mechanism 98 includes a tenth arm 9802 that is swingably supported on the storage frame 70 via a pivot 9804 and is connected to the boom 28 via a pin and a long hole so as to swing in conjunction with the movement of the boom 28, and an eleventh arm 9806 that is swingably supported on the storage frame 70 via a pivot 9808 below the tenth arm 9802. One end of the 10th arm 9802 and one end of the 11th arm 9806 are connected by a wire 9810, the other end of the 11th arm 9806 and the storage box 18 are connected by a wire 9812, and a return spring 9814 that urges the storage box 18 in the direction from the working space 14 to the storage space 16 is provided between the other end of the 11th arm 9806 and the storage frame 70. In addition, a stopper pin 9816 having an inclined surface that allows the other end of the 11th arm 9806 to swing toward the storage box 18 and prevents the other end of the 11th arm 9806 from swinging away from the storage box 18 is constantly biased in a protruding direction at the other end of the 11th arm 9806. When the boom 28 is moved from the retracted position to the extended position, the tenth arm 9802 , the wire 9810 , and the eleventh arm 9806 swing, pulling the return spring 9814 , which is maintained in this state by the stopper pin 9816 .

[0037] A first auxiliary wire (not shown) is connected to the middle part of the second wire 76B that suspends the third tool 74C via an attachment device and link mechanism (not shown), and this first auxiliary wire is connected to a stopper pin 7810 shown in Figure 9 via multiple pulleys (not shown). In conjunction with the downward movement of the third tool 74C from the standby position Y, the stopper pin 7810 is pulled out by the first auxiliary wire, and the accommodation box 18 is moved from the working space 14 toward the accommodation space 16 by the return spring 9814. As shown in FIG. 9, the pin 7810 is constantly protruding due to the spring 7812, maintaining the inclined state of the storage box frame 72, and the pin removal mechanism 100 removes this pin 7810 in conjunction with the movement of the storage box 18 from the working space 14 to the storage space 16, thereby releasing the inclined state of the storage box frame 72. As shown in FIG. 17, the pin removal mechanism 100 includes a cam 102 attached to the underside of the widthwise end of the storage box 18, a twelfth arm 104 that engages with the cam 102 when the storage box 18 is positioned at an intermediate position between the work space 14 and the storage space 16, and an auxiliary wire 112 whose one end is connected to the twelfth arm 104 and whose one end is connected to the stopper pin 7810 via a plurality of pulleys 106, 108, 110. Therefore, when the storage box 18 is positioned midway between the work space 14 and the storage space 16, the 12th arm 104 swings, the stopper pin 7810 is pulled out via the auxiliary wire 112, and when the storage box 18 is positioned closer to the storage space 16, the storage box frame 72 swings around the fulcrum 73 and becomes inclined as shown in Figure 6, and when the storage box 18 is positioned closer to the work space 14, the storage box frame 72 swings around the fulcrum 73 and becomes inclined as shown in Figure 7. By providing an interlocking mechanism 94 for returning the storage box, the unused third tool 74C can be raised from the standby position to the retracted position, thereby securing a larger working space 14, which is advantageous in making the assembling work of the transfer 10 efficient and easy.

[0038] In this embodiment, the auxiliary device includes all of the storage box protruding interlocking mechanism 78, the lid plate opening interlocking mechanism 80, the second lid plate closing interlocking mechanism 82, the first lid plate closing interlocking mechanism 84, the second lid plate opening interlocking mechanism 86, the tool lowering interlocking mechanism 88, the second lid plate final closing interlocking mechanism 90, the second tool lifting mechanism 92, the third tool lifting mechanism 96, and the storage box returning interlocking mechanism 94. However, the present invention is sufficient if it includes at least one of these ten mechanisms. However, if a mechanism is omitted, the worker will have to perform the movement performed by the omitted mechanism, which is disadvantageous in terms of increasing the efficiency of the assembly work, so it is preferable to omit as few mechanisms as possible. In addition, the storage box protruding interlocking mechanism 78, the lid plate opening interlocking mechanism 80, the second lid plate closing interlocking mechanism 82, the first lid plate closing interlocking mechanism 84, the second lid plate opening interlocking mechanism 86, the tool lowering interlocking mechanism 88, the second lid plate final closing interlocking mechanism 90, the second tool lifting mechanism 92, the third tool lifting mechanism 96 and the storage box return interlocking mechanism 94 are not limited to the structures in the embodiment, and various conventionally known structures can be adopted. [Explanation of symbols]

[0039] 10 Transfer 12 Engine 14. Working Space 16 Storage Space 18 Storage Box 1802 Mobile tool storage unit 1804 Spindle 1806 Spring 1810A First Storage Box 1812A 1st cover plate 1810B Second Storage Box 1812B 2nd lid plate 1813 Spindle 1820 wheels 1810A First Storage Box 1810B Second Storage Box 20 Lifting Machine 22 Work trolley 24 Transport Cart 26 Posts 2602 Bearing section 28 Boom 2802 Pulley 2804 Bracket 30 Lifting Wire 3002 Mounting fixture 3004 First pulley bracket 3006 Lifting wire pulley 3008 Lower limit position stopper 3008A Moving contact plate 3008B Fixed abutment plate 32 Traction wire 3202 Stopper 3204 Towing hook 3206 No. 2 Pulley Bracket 3208 Pulley for traction wire 34 Spring balancer 3402 cases 36 Lever mechanism 36A Second type lever mechanism 36B Third type lever mechanism 37 Mechanism for moving the point of action 38 Hanging device (hook) 3802 Lightening lever 3804 Bracket 40 Main Arm 4002 Guide arm for moving lifting wire 4004 Guide arm for moving traction wire 42 Main arm support shaft 44 First board 46 Bracket 46 Second board 48 Arm for moving the point of application and force 4802 Axis for moving the point of application and force 4804 Arm body 4804A Curved Section 3804B Straight section 4806 Auxiliary rod 4808 Mounting fixture 50 Cable 5002 Cable outer 5004 Cable Inner 52 Fixed Arm 5202 Mounting fixture 54, 56 A pair of guide members 54 One guide member 5402 Curved Guide 56 The other guide member 58 Auxiliary Pulley 5802 Bracket 60 Auxiliary coil spring for lifting wire 62 Auxiliary coil spring for traction wire 64 1st pulley 66 Second pulley 68 Auxiliary Wire 70 Containment Frame 72 Storage box frame 7202 Guide Rod 7204 Slider 73 Fulcrum 74A 1st tool 74B 2nd tool 74C 3rd tool 76A 1st Wire 76B 2nd Wire 78 Storage box projection linkage mechanism 7802 Arm 7804 Wire 7806 Pulley 7810 Pins 7810A Slope 7812 Coil spring 80 Interlocking mechanism for opening the lid plate 8002 First Arm 8004 Support shaft 8006 2nd Arm 8008 Support shaft 8010 Wire 8012 pin 8012A Conical surface 8014 Coil spring 82 Interlocking mechanism for closing the second cover plate 8202 Wire 84 Interlocking mechanism for closing the first cover plate 8402 Wire 86 Interlocking mechanism for opening the second cover plate, 8602 Support shaft 8604 Wire 8606 3rd Arm 8608 Support shaft 8610 4th Arm 88 Tool lowering interlocking mechanism, 8802 5th Arm 8804 Rod 8806 6th Arm 8808 7th Arm 8810 Pins 8812 Spring 8814 Click mechanism 8818 Wire Case 8820, 8822 Pulley 90 Second cover plate final closing interlocking mechanism, 9002 Wire 92 Second tool lift mechanism 9202 8th Arm 9204 Mounting fixture 9206 Wire 9208 Contact plate 94 Linkage mechanism for returning the storage box 96 3rd tool lift mechanism 9602 9th Arm 9604 Mounting fixture 9606 Wire 9608 Contact plate 98 Storage box return mechanism 9802 10th Arm 9804 Support shaft 9806 11th Arm 9808 Support shaft 9810 Wire 9812 Wire 9814 Return spring 9816 Stopper pin 100 Pin extraction mechanism 102 Cam 104 12th Arm 106, 108, 110 Pulley 112 Auxiliary Wire P1 fulcrum P2 Point of action P3 Focus

Claims

1. A boom provided at a position above the floor surface; A lifting wire that is hung down from the tip of the boom and has a lifting tool attached to its tip; A spring balancer that is provided on the boom and constantly pulls the towing wire; a lever mechanism provided on the boom, the lever mechanism includes a main arm that is swingably supported by a support shaft that is provided on the boom and that constitutes a fulcrum, a base end of the lifting wire that is movably connected to the extension direction of the main arm and that constitutes a point of application, and a tip end of the pulling wire that is movably connected to the extension direction of the main arm and that constitutes a force point, The suspending tool is positioned at a standby position above a floor surface when not in use, the lever mechanism constitutes a second type of lever mechanism in which the point of application is farther from the fulcrum than the point of force is when the suspending tool is in the standby position, a mechanism for shifting the load point and the force point is provided, which changes the distance between the load point and the fulcrum to be greater than the distance between the force point and the fulcrum at the standby position of the hanging tool, thereby converting the lever mechanism from the second type lever mechanism to a third type lever mechanism. A lifting machine characterized by:

2. The third type of lever mechanism gradually increases the distance between the point of action and the fulcrum and gradually decreases the distance between the point of force and the fulcrum as the hanging tool is pushed down.

2. The lifting machine according to claim 1, wherein the lifting machine comprises:

3. The main arm includes a guide arm for moving a lifting wire and a guide arm for moving a pulling wire, the guide arm being opposed to each other, The base end of the lifting wire is movably coupled to the lifting wire moving guide arm in the extension direction, The tip of the pulling wire is movably connected to the pulling wire moving guide arm in the extension direction.

3. A lifting machine according to claim 1 or 2.

4. a standby position stopper that stops the suspending tool at the standby position is provided; When the suspending device is in the standby position, the main arm is in a swing initial position extending in a direction substantially perpendicular to the boom, The mechanism for shifting the load point and the force point includes a reduction lever and an arm for shifting the load point and the force point, The lightening lever is provided to be grippable by the hanging tool, When the load point / force point moving arm grips the lightening lever at the standby position of the hanging tool, the load point / force point moving arm moves the base end of the lifting wire and the tip end of the pulling wire along the extension direction of the main arm in conjunction with the gripping, thereby making the distance between the load point and the fulcrum larger than the distance between the force point and the fulcrum.

4. The lifting machine according to claim 3, characterized in that

5. An auxiliary coil spring for the lifting wire is provided to bias the base end of the lifting wire toward the fulcrum, and an auxiliary coil spring for the pulling wire is provided to bias the tip end of the pulling wire in a direction away from the fulcrum.

5. The lifting machine according to claim 4, characterized in that

6. A curved guide is provided on the boom, One end of the auxiliary coil spring for lifting wire in the longitudinal direction is movably connected to the curved guide, An auxiliary rod is provided protruding from the load point / force point moving arm, a wire pulley mechanism is provided which connects one longitudinal end of the auxiliary coil spring for the lifting wire to the tip of the auxiliary rod, and moves the one longitudinal end of the auxiliary coil spring for the lifting wire along the curved guide when the lightening lever is gripped, thereby shortening the distance between the one longitudinal end of the auxiliary coil spring for the lifting wire and the base end of the lifting wire.

6. The lifting machine according to claim 5, characterized in that

7. A lower limit position stopper is provided to determine a lower limit position of the suspending tool below the standby position. A lifting machine according to any one of claims 1 to 6.

8. a work table and a work space are provided for performing an operation of assembling the first member suspended by the hoisting machine to the second member; The boom is supported by a support provided at a location above a floor surface so as to be movable between a retracted position where a tip of the boom approaches the support and a boom extended position where a tip of the boom is separated from the support, a storage box containing fasteners for connecting the first member to the second member is disposed in a storage space facing the work table across the work space, The storage box includes a movable tool storage section in which a first tool for fastening a first fastener is stored, a first storage box having a first cover plate in which the first fastener is stored and which can be opened and closed, and a second storage box having a second cover plate in which a second fastener is stored and which can be opened and closed, A second tool for fastening the second fastener and a third tool used at the end of the operation of assembling the first member to the second member are suspended above the working space via a first wire and a second wire, respectively, at a retreat position above the working space; an auxiliary device that assists in assembling the first member to the second member; The auxiliary device includes: a storage box protruding linkage mechanism that moves the storage box from the storage space to the working space in conjunction with movement of the boom from the retracted position to the protruding position; a cover plate opening interlocking mechanism that swings the first cover plate and the second cover plate from a closed position to an open position in association with movement of the boom from the retracted position to the extended position; a second cover plate closing interlocking mechanism that swings the second cover plate from an open position to a closed position in association with movement of the boom from the extended position to the retracted position; a first cover plate closing interlocking mechanism that swings the first cover plate from the open position to the closed position in association with a movement of the movable tool storage unit caused by the first tool pushing the movable tool storage unit; a second cover plate opening interlocking mechanism that swings the second cover plate from the closed position to an open position in association with a movement of the movable tool storage unit caused by the first tool pushing the movable tool storage unit; a tool lowering interlocking mechanism that lowers the second tool and the third tool from the retracted position to a standby position in association with a movement of the movable tool storage unit caused by the first tool pushing the movable tool storage unit; a second cover plate final closing interlocking mechanism that swings the second cover plate from an open position to a closed position in association with downward movement of the third tool from the standby position; a second tool lifting mechanism that lifts the second tool from the use standby position to the retracted position in association with downward movement of the third tool from the use standby position; a third tool lifting mechanism that lifts the third tool to the retracted position when the third tool is released in conjunction with a downward movement of the third tool from the standby position; a storage box returning interlocking mechanism that moves the storage box from the working space to the storage space in association with downward movement of the third tool from the use standby position; The lifting machine according to any one of claims 1 to 7, characterized in that it is configured to include at least one of the following.

Images