Lifting machine

Abstract

To solve the above circumstances, and to further improve safety when transporting goods.SOLUTION: A lifting machine includes a traveling device, a lifting device, and a braking device. The traveling device is configured to enable the lifting machine to travel. The lifting device is configured to be able to hoist and lower an object to be transported, and is configured so that a load of the object applied to the lifting device is applied to the braking device. The braking device generates a braking force when the load of the object to be transported is applied to the braking device, thereby disabling the traveling device from traveling, and when the load is removed from the braking device, the braking force is eliminated, thereby enabling the traveling device to travel.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lifting machine capable of transporting an object. [Background technology]

[0002] Patent Document 1 discloses a transport system in which a suspension mechanism moves while suspending an object to be transported, thereby enabling the transport system to transport another object. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2022-120844 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology of Patent Document 1, the suspension mechanism moves while suspending the transported object, so extremely careful operation is required to ensure safety.

[0005] The present invention has been made in view of the above circumstances, and has an object to further improve safety when transporting goods. [Means for solving the problem]

[0006] According to the present invention, the following inventions are provided. [1] A lifting machine comprising a traveling device, a lifting device, and a braking device, the traveling device being configured to enable the lifting machine to travel, the lifting device being configured to be capable of hoisting and lowering an object to be transported, and the load of the object to be applied to the lifting device being applied to the braking device, the braking device generating a braking force when the load of the object to be transported is applied to the braking device to disable the traveling device from traveling, and dissipating the braking force when the load is removed from the braking device to enable the traveling device to travel. [2] A lifting machine as described in [1], wherein the lifting device hoists the transported object and then hands it over to the running device, and the running device receives the transported object from the lifting device, supports the transported object, and is configured to run in that state. [3] A lifting machine as described in [2], wherein the transfer of the transported object is configured to be achieved by the lifting device performing the lifting and lowering operations of the transported object. [4] A lifting machine as described in [3], wherein the traveling device is provided with a pair of hooks, and when the lifting device hoists the transported object, the hook portion of the transported object abuts against the pair of hooks and the pair of hooks rotate in opposite directions, and when the transported object is further lifted, the abutment is released and the hooks return to their original positions under their own weight, and then, when the lifting device lowers the transported object, the hook portion is hooked onto the pair of hooks and the transported object is handed over to the traveling device. A lifting machine as described in [5][2], wherein the traveling device has a loading section, and the lifting device is configured to transfer the transported object to the traveling device by loading the transported object on the loading section. [6] A lifting machine as described in any one of [1] to [5], wherein the braking device is provided with an elastic member, and when a preload is applied to the braking device, the elastic member is elastically deformed, thereby causing the braking device to generate the braking force, and when the load is removed from the braking device, the elastic member returns to its original shape, thereby causing the braking force to disappear. Effect of the Invention

[0007] The lifting machine of the present invention is configured such that when the load of the transported object is applied to the braking device via the lifting device, the traveling device is unable to travel. Therefore, the lifting machine will not travel with the lifting device suspending the transported object, thereby improving safety when transporting the transported object. [Brief description of the drawings]

[0008] [Figure 1] This is a front view (partially cross-sectional) showing a method of transporting an object 5 using the lifting machine 1 of the first embodiment of the present invention, and shows a state in which the load of the object 5 is not applied to the braking device 4 and the traveling device 2 is capable of traveling. [Diagram 2] FIG. 2 is an enlarged view of an area A in FIG. [Diagram 3] 2 is a view of the traveling device 2 and the rail 6 in FIG. 1 as viewed from the right side. [Figure 4] 1, the lifting device 3 has lifted the transported object 5, and the load of the transported object 5 has been applied to the braking device 4, generating a braking force that has caused the traveling device 2 to become unable to travel. [Diagram 5] 5 shows a state in which the hook portion 5b3 comes into contact with the hook 2f and rotates the hook 2f as the transported object 5 is hoisted, following the state shown in FIG. [Figure 6] This shows the state in which the transported object 5 is further lifted from the state in Figure 5 and the hooking portion 5b3 is hooked onto the hook 2f, whereby the lifting device 3 hands over the transported object 5 to the traveling device 2, thereby dissipating the braking force of the braking device 4 and allowing the traveling device 2 to travel. [Figure 7] 7 shows a state in which the lifting device 3 has lifted the transported object 5 from the state shown in FIG. 6, and the weight of the transported object 5 is applied to the braking device 4, generating a braking force that causes the traveling device 2 to become unable to travel. [Figure 8] This is a front view (partially cross-sectional) showing a method of transporting an object 5 using a lifting machine 1 of the second embodiment of the present invention, and shows a state in which the lifting device 3 lifts the object 5 and the running device 2 is unable to move due to the braking force generated when the load of the object 5 is applied to the braking device 4. [Figure 9] 9 is a view of the traveling device 2 and the rail 6 in FIG. 8 as viewed from the right side. [Figure 10] This shows a state in which, from the state in FIG. 8, the lifting device 3 hands over the transported object 5 to the traveling device 2, whereby the braking force of the braking device 4 is lost and the traveling device 2 becomes capable of traveling. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, embodiments of the present invention will be described. Various features shown in the following embodiments can be combined with each other. Also, each feature can be an invention independently.

[0010] 1. First embodiment A configuration of a lifting machine 1 and a method for transporting an object 5 according to a first embodiment of the present invention will be described with reference to Figs. 1 to 7.

[0011] 1-1. Configuration of lifting machine 1 As shown in Fig. 1, the lifting machine 1 includes a traveling device 2, a lifting device 3, and a braking device 4. The traveling device 2 is configured to enable the lifting machine 1 to travel. The lifting device 3 is configured to be capable of hoisting and lowering a transported object 5. The load of the transported object 5 applied to the lifting device 3 is configured to be applied to the braking device 4. The braking device 4 is configured to generate a braking force when the load of the transported object 5 is applied to the braking device 4, thereby disabling the traveling device 2 from traveling, and to lose the braking force when the load is removed from the braking device 4, thereby enabling the traveling device 2 to travel.

[0012] According to this configuration, when the load of the transported object 5 is applied to the braking device 4 via the lifting device 3, the traveling device 2 cannot travel. Therefore, the lifting machine 1 will not travel with the transported object 5 suspended by the lifting device 3, thereby improving safety when transporting the transported object 5.

[0013] Each component will be described in detail below.

[0014] As shown in Figs. 1 to 3, the lifting machine 1 is disposed within a rail 6 and configured to be self-propelled on a pair of travel paths 6a. The traveling device 2 includes a frame 2a, wheels 2b, a drive device 2c, an axle 2d, a rotation transmission member 2e, and a pair of grappling hooks 2f. The wheels 2b are provided corresponding to each of the pair of travel paths 6a. The wheels 2b are connected to the frame 2a via the axle 2d. The wheels 2b are rotationally driven by the drive device 2c via the rotation transmission member 2e. The wheels 2b are rotationally driven, so that the traveling device 2 enables the lifting machine 1 to travel. Examples of the rotation transmission member 2e include a chain, a belt, and a gear.

[0015] The frame 2a is provided with a connecting portion 2g that allows connection to the connecting member 7. The pair of hooks 2f are sandwiched between the pair of frames 2a. The pair of hooks 2f are rotatably supported with respect to the frame 2a. The hook hooks 2f include a hook portion 2f1, and are capable of supporting the transported object 5 by hooking the hook portion 2f1 onto the transported object 5. The traveling device 2 is configured to be capable of traveling while supporting the transported object 5.

[0016] The lifting device 3 includes a hook lifting device 3a and a hook 3b. The hook lifting device 3a is configured to be able to lift and lower the hook 3b. The hook 3b is configured to be able to hook an object 5. The hook lifting device 3a lowers the hook 3b, and in this state, the object 5 is hooked onto the hook 3b, and then the hook lifting device 3a can lift the hook 3b together with the object 5. The lifting device 3 is configured to be placed on or hung from the braking device 4, so that the load of the object 5 applied to the lifting device 3 is applied to the braking device 4. In this embodiment, the lifting device 3 is hung from the braking device 4 via a connecting member 8.

[0017] The hook lifting device 3a is, for example, a winch or a chain block, and in this case, includes a hanging material 3a1 such as a wire or a chain and a winding device 3a2, which winds and unwinds the hanging material 3a1, thereby enabling the lifting and lowering of the hook 3b. Alternatively, the hook lifting device 3a is, for example, a cylinder mechanism, and in this case, the hook 3b is lifted and lowered by changing the amount of working fluid (e.g., hydraulic oil) in the cylinder.

[0018] The lifting device 3 is configured to be capable of lifting the transported object 5 and then handing it over to the traveling device 2. The traveling device 2 is also configured to be capable of receiving the transported object 5 from the lifting device 3, supporting the transported object 5, and traveling in that state. The transported object 5 is configured to be able to be handed over by the lifting device 3 performing a hoisting and lowering operation on the transported object 5.

[0019] The braking device 4 includes a base 4a, a wheel 4b, an elastic member 4c, a wheel frame 4e, a first connecting portion 4f, and a second connecting portion 4g. The connecting member 8 is connected to the base 4a at the first connecting portion 4f. The load of the lifting device 3 is applied to the base 4a via the connecting member 8. The wheel 4b is supported by the wheel frame 4e, and the elastic member 4c is disposed between the wheel frame 4e and the base 4a. The connecting member 7 is connected to the base 4a at the second connecting portion 4g. The wheel 4b is configured to travel on the travel path 6a.

[0020] The elastic member 4c supports the base 4a from below. In this state, the base 4a is not in contact with the running path 6a, and the braking device 4 does not generate a braking force that disables the running device 2 from running. Therefore, the running device 2 is in a running state. In this state, it is preferable that the braking force generated by the braking device 4 is zero, but it is also possible to generate a braking force that does not disable the running device 2 from running.

[0021] On the other hand, when the load of the transported object 5 is applied to the braking device 4 (more specifically, the base 4a), the elastic member 4c is elastically deformed, and the braking device 4 generates a braking force to disable the traveling device 2 from traveling. In this embodiment, as shown in FIG. 4, the elastic member 4c is compressed and the base 4a contacts the traveling path 6a to generate the braking force, but another configuration may be used. For example, the elastic member 4c may be tensilely deformed when a load is applied to the base 4a. In addition, the braking force may be generated by contact between members other than the base 4a and the traveling path 6a. When the load is removed from the braking device 4 (more specifically, the base 4a), the elastic member 4c returns to its original shape, and the braking force disappears. In this embodiment, the base 4a is no longer in contact with the traveling path 6a, and the braking force disappears. It is preferable that this braking force becomes zero, but a braking force that does not disable the traveling device 2 from traveling may remain.

[0022] In addition to providing the elastic member 4c, or instead of providing the elastic member 4c, the wheel 4b may be an elastic member. In this case, when the load of the transported object 5 is applied to the brake device 4, the load is applied to the wheel 4b, and the wheel 4b is elastically deformed (e.g., elastically compressed) to generate a braking force, and when the load of the transported object 5 is removed from the brake device 4, the wheel 4b returns to its original shape and the braking force disappears. The wheel 4b made of an elastic member may be, for example, a urethane roller. In one example, when the load of the transported object 5 is not applied to the brake device 4, the wheel 4b has a circular cross section, the base 4a is not in contact with the running path 6a, and no braking force is generated, and when the load of the transported object 5 is applied to the brake device 4, the wheel 4b is crushed, and the base 4a comes into contact with the running path 6a to generate a braking force. In this case, when the load of the transported object 5 is removed, the wheel 4b returns to a circular cross section by a restoring force, and the braking force disappears.

[0023] The connecting member 7 is rotatably connected to both the traveling device 2 and the braking device 4 (more specifically, the base 4a). Therefore, when a downward load is applied to the base 4a, the traveling device 2 does not displace, and only the base 4a can displace downward.

[0024] 1, in one example, the transported object 5 includes a suspended load 5a, a hoisting tool 5b, and a hoisting material 5c. The suspended load 5a is the object of transportation. The hoisting tool 5b is a member for making it easier to hoist the suspended load 5a by the lifting device 3. The hoisting material 5c is a member for attaching the suspended load 5a to the hoisting tool 5b, and is, for example, a wire.

[0025] The hoist 5b has a base 5b1, and the base 5b1 is provided with a hoisting portion 5b2, a hooking portion 5b3, and a plurality of hoisting material attachment portions 5b4. The hoisting portion 5b2 is a portion for hooking the hook 3b, and is, for example, a pin provided so as to protrude from the base 5b1 in a non-vertical direction (for example, in a direction perpendicular to the main surface 5b5 of the base 5b1). The hooking portion 5b3 is a portion that abuts against the hooking hook 2f to rotate the hooking hook 2f when the lifting device 3 hoists the hoist 5b by hooking the hoisting portion 5b2 on the hook 3b, and is, for example, a pin provided so as to protrude from the base 5b1 in a non-vertical direction (for example, in a direction perpendicular to the main surface 5b5 of the base 5b1).

[0026] The suspending member attachment portion 5b4 is a portion for attaching the suspending member 5c, and is formed, for example, by a through hole provided in the base 5b1. The multiple suspending member attachment portions 5b4 are preferably arranged symmetrically with respect to a vertical plane that passes through the hoisting portion 5b2 and is perpendicular to the main surface 5b5. It is also preferable that multiple suspending member attachment portions 5b4 are provided on each of both sides of the symmetric plane. In this case, by changing the position at which the suspending member 5c is attached to the suspending member attachment portion 5b4, the stability of the load 5a attached to the hoist 5b can be improved.

[0027] 1-2. How to transport the item 5 Next, a method for transporting an object 5 by using the lifting machine 1 will be described.

[0028] (1) State before lifting 1 shows a state before the lifting device 3 lifts the transported object 5, and the load of the transported object 5 is not applied to the lifting device 3 and the braking device 4, and the braking device 4 does not generate a braking force that disables the traveling device 2 from traveling. In this state, the traveling device 2 is in a traveling state.

[0029] (2) Lifting of transported object 5 Next, as shown in Fig. 4, the lifting device 3 lowers the hook 3b to hook the hook 3b onto the hoisting portion 5b2, and in this state, the hook 3b is raised to hoist the transported object 5. In this state, the weight of the transported object 5 is applied to the braking device 4 via the lifting device 3. When the weight of the transported object 5 is applied to the braking device 4, the braking device 4 generates a braking force, and the traveling device 2 becomes unable to travel.

[0030] (3) Delivery of transported item 5 Next, as shown in FIG. 5, when the lifting device 3 further raises the hook 3b to further lift the transported object 5, the hooking portion 5b3 comes into contact with the hook 2f, and the pair of hooks 2f rotate in opposite directions (toward each other in this embodiment). When the lifting device 3 further raises the hook 3b from this state to further lift the transported object 5, the hooking portion 5b3 and the hook 2f are released from contact, and the hook 2f returns to its original position by its own weight, as shown in FIG. 6. After that, when the lifting device 3 lowers the hook 3b, the hooking portion 5b3 is hooked on the hook 2f and handed over to the traveling device 2. As a result, the load of the transported object 5 applied to the lifting device 3 and the braking device 4 is transferred to the traveling device 2, the braking force of the braking device 4 disappears, and the traveling device 2 becomes capable of traveling.

[0031] (4) Transportation of transported goods 5 Next, the traveling device 2 travels to a desired position while supporting the transported object 5.

[0032] (5) Suspension of transported object 5 After the transported object 5 is moved to the desired position, the lifting device 3 raises the hook 3b to hoist the transported object 5, as shown in FIG. 7. When the load of the transported object 5 is transferred from the traveling device 2 to the lifting device 3, the brake device 4 generates a braking force, and the traveling device 2 cannot travel. Next, the pair of hooks 2f are rotated in the opposite direction to that at the time of delivery of the transported object 5 so that the hooking portion 5b3 is not caught on the hook hook 2f, and in this state, the hook 3b is lowered to suspend the transported object 5. When the transported object 5 touches the ground, the hook 3b is removed from the transported object 5, and the transportation of the transported object 5 is completed. In one example, the pair of hooks 2f can be rotated using a link mechanism.

[0033] 2. Second embodiment A second embodiment of the present invention will be described with reference to Figures 8 to 10. This embodiment is similar to the first embodiment, and the contents described in the first embodiment also apply to this embodiment as long as they are not contrary to the spirit of the first embodiment. This embodiment differs from the first embodiment mainly in the configuration in which the traveling device 2 supports the transported object 5. The following description will focus on the differences.

[0034] In the first embodiment, the traveling device 2 supports the transported object 5 by hooking the hooking portion 5b3 on the hook 2f, but the traveling device 2 may support the transported object 5 in another manner. In this embodiment, as shown in Figs. 8 to 10, a placement portion 2h for placing the transported object 5 is provided on the frame 2a of the traveling device 2, and the transported object 5 lifted by the lifting device 3 is placed on the placement portion 2h to support the transported object 5. In one example, the placement portion 2h is disposed between a pair of frames 2a. If one of the pair of frames 2a is frame 2a1 and the other is frame 2a2, the placement portion 2h is connected to the frame 2a1 via a hinge 2i and is rotatable around the hinge 2i. The frame 2a2 is provided with a locking portion 2j, which is configured to be able to lock and support the placement portion 2h from below.

[0035] Fig. 8 shows a state in which the lifting device 3 is lifting the transported object 5. In this state, the braking device 4 is generating a braking force, and the traveling device 2 is unable to travel. When the lifting device 3 raises the hook 3b to lift the transported object 5, the transported object 5 pushes up the placement part 2h, causing the placement part 2h to rotate around the hinge 2i, and reach the state shown by the dotted line in Fig. 9. Note that the placement part 2h has an opening (not shown) to avoid interference with the hanging material 3a1, so that in the state shown in Fig. 8, the placement part 2h does not interfere with the hanging material 3a1.

[0036] When the lifting device 3 further raises the hook 3b, the transported object 5 is no longer in contact with the placement portion 2h, and the placement portion 2h rotates by its own weight, so that the tip of the placement portion 2h comes into contact with the locking portion 2j. In this state, when the lifting device 3 lowers the hook 3b, the transported object 5 is placed on the placement portion 2h, and the load of the transported object 5 applied to the lifting device 3 and the braking device 4 is transferred to the traveling device 2, the braking force of the braking device 4 disappears, and the traveling device 2 becomes able to travel, as shown in Fig. 10.

[0037] Thereafter, the traveling device 2 travels to a desired position while supporting the transported object 5, and moves the transported object 5 to the desired position. Thereafter, while the lifting device 3 hoists the transported object 5, the placement part 2h is rotated by a mechanism (not shown) to create a gap between the frames 2a1 and 2a2, and the transported object 5 is lowered.

[0038] In this embodiment, the load 5 pushes up the placement portion 2h, but the placement portion 2h may be rotated by another mechanism. Also, instead of rotating the placement portion 2h, the load 5 may be moved upward or downward relative to the placement portion 2h by sliding the placement portion 2h. [Explanation of symbols]

[0039] 1: Lifting machine 2: Running gear 2F: Hanging hook 2h: Placement section 3: Lifting device 4: Braking device 4c: Elastic member 5: Transport items 5b3: Hook section

Claims

1. A lifting machine comprising a traveling device, a lifting device, and a braking device, The traveling device is configured to enable the lifting machine to travel, The lifting device is configured to be able to lift and lower the transported object, The load of the transported object applied to the lifting device is applied to the braking device, The braking device generates a braking force when the load of the transported object is applied to the braking device, thereby disabling the traveling device from traveling, and when the load is removed from the braking device, the braking force is eliminated, thereby enabling the traveling device to travel.

2. The lifting machine according to claim 1, The lifting device hoists the transported object and then transfers the transported object to the traveling device, The traveling device is configured to receive the transported object from the lifting device, support the transported object, and travel in that state.

3. The lifting machine according to claim 2, A lifting machine configured so that the transfer of the transported object can be achieved by the lifting device performing a hoisting and lowering operation of the transported object.

4. The lifting machine according to claim 3, The traveling device includes a pair of hooks, This lifting machine is configured so that when the lifting device hoists the transported object, the hooking portion of the transported object abuts against the pair of hooks and the pair of hooks rotate in opposite directions, and when the transported object is further lifted, the abutment is released and the hooks return to their original positions under their own weight, and then when the lifting device lowers the transported object, the hooking portion is hooked onto the pair of hook hooks and the transported object is handed over to the running device.

5. The lifting machine according to claim 2, The traveling device includes a placement unit, The lifting device is configured to transfer the transported object to the traveling device by placing the transported object on the placement section.

6. A lifting machine according to any one of claims 1 to 5, The braking device includes an elastic member. When a front load is applied to the braking device, the elastic member is elastically deformed, causing the braking device to generate the braking force, When the load is removed from the braking device, the braking force disappears as the elastic member returns to its original shape.

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