Telescopic device and method for installing heavy objects using the same

Abstract

To provide a telescopic device that is quick to install and expands and contracts diagonally. [Solution] The telescopic device 1 includes a first telescopic mechanism 10, a second telescopic mechanism 20, and connecting parts 31, 32, and 33 that connect the link members constituting the first telescopic mechanism 10 and the second telescopic mechanism 20 so that they can rotate relative to each other at a connecting position away from the longitudinal center. Because the connecting position by the connecting parts 31, 32, and 33 of the telescopic device 1 is at an eccentric position away from the center, when the first telescopic mechanism 10 and the second telescopic mechanism 20 are extended, the respective tips of the first telescopic mechanism 10 and the second telescopic mechanism 20 are lifted diagonally upward from a predetermined position on the upper surface of the support base 40. This makes it possible to raise a heavy object lying on its side to an upright position.

Description

Technical Field

[0001] The present invention relates to a telescopic device and a method for installing a heavy object using the same.

Background Art

[0002] Heavy objects such as distribution boards installed inside a building are carried into the building in a lying-down state. Therefore, when installing at a predetermined installation location, it is necessary to raise the heavy object in the lying-down state. Conventionally, as a device for raising a heavy object in a lying-down state inside a building, a device using two chain blocks that can move horizontally has been proposed (for example, Patent Document 1). In this prior art, after lifting the heavy object in a horizontal posture with two chain blocks, while adjusting the length of the chain of each chain block, each chain block is moved horizontally to raise the heavy object.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above prior art, since two chain blocks are used to lift the heavy object, it is necessary to arrange the chain blocks at a position higher than the height dimension of the heavy object. Therefore, when a space for arranging the chain blocks cannot be secured at a position higher than the heavy object to be installed, the above prior art cannot be adopted.

[0005] In addition, in the above prior art, since it is necessary to stabilize the heavy object when moving the two chain blocks horizontally, a pair of support columns are installed in a state of being stretched between the floor surface and the ceiling surface. Therefore, it takes time to install the lifting device, and the heavy object cannot be lifted efficiently.

[0006] Therefore, the present invention has been made to solve the above-mentioned conventional problems, and aims to provide an extendable device that can be extended and retracted diagonally without taking much time to set up, and a method for setting up heavy objects that allows heavy objects to be easily erected even in a relatively small space using the extendable device. [Means for solving the problem]

[0007] To achieve the above objective, firstly, the present invention provides an extendable device comprising: a first extendable mechanism having a plurality of first link members, the ends of the plurality of first link members being rotatably connected to each other to enable extension and retraction; a second extendable mechanism having a plurality of second link members arranged to overlap the plurality of first link members, the ends of the plurality of second link members being rotatably connected to each other to enable extension and retraction; a connecting portion that connects the first link members and the second link members to each other at a connecting position away from the respective longitudinal center positions of the first link members and the second link members; and a support base that pivotally supports the base end of the first extendable mechanism at a predetermined support position and slidably supports the base end of the second extendable mechanism toward the support position, wherein when the first extendable mechanism and the second extendable mechanism are extended, the connecting portion rotates the first link members and the second link members to each other at the connecting position, causing the tips of the first extendable mechanism and the second extendable mechanism to be lifted diagonally upward from a predetermined position on the upper surface of the support base.

[0008] Secondly, the present invention relates to a telescopic device having the above-described first configuration, characterized in that the tips of the first telescopic mechanism and the second telescopic mechanism are lifted diagonally upward to erect a heavy object.

[0009] Thirdly, the present invention is characterized in that, in an expandable device having the first configuration described above, it further comprises an expandable drive unit for extending or contracting the first expandable mechanism and the second expandable mechanism.

[0010] Fourth, the present invention is characterized in that, in an expandable device having the second configuration described above, it further comprises a base for holding the support base.

[0011] Fifth, the present invention relates to an extendable device having the fourth configuration described above, wherein the base is switchable between a horizontal position and an inclined position, and the support base is held in the inclined position when the first extendable mechanism and the second extendable mechanism are extended.

[0012] Sixth, the present invention provides an expandable device having the fourth configuration described above, further comprising a damper member having one end connected to the upper part of the heavy object and the other end connected to the support base or the base, wherein the damper member is characterized in that it mitigates the impact when the heavy object is in an upright position.

[0013] Seventh, the present invention is characterized in that, in an expandable device having the second configuration described above, it further comprises an engaging member that engages with and rotates at the bottom corner portion where the heavy object comes into contact with the floor surface.

[0014] Eighth, the present invention is a method for installing a heavy object, characterized in that the heavy object is transported to the installation site in a lying position, the lying heavy object is raised to an upright position using the telescopic device described in any one of claims 1 to 7, and installed at a predetermined installation location.

[0015] Ninth, the present invention relates to a method for installing a heavy object having the configuration of the eighth configuration described above, wherein the telescopic device is characterized in that it installs the heavy object by raising the heavy object upright on the platform of a trolley, moving the trolley to transport the heavy object to the installation location in an upright position, and moving the heavy object from the platform of the trolley to the installation location in an upright position and fixing it in place. [Effects of the Invention]

[0016] According to the present invention, it is possible to provide a telescopic device that does not take time to install and can expand and contract in an oblique direction. Further, by using this telescopic device, it becomes possible to easily raise a heavy object even in a relatively space-saving manner.

Brief Description of the Drawings

[0017] [Figure 1] It is a figure which shows the expansion - contraction device in 1st Embodiment. [Figure 2] It is a figure which shows the expansion - contraction mechanism in a contracted state. [Figure 3] It is a figure which shows the expansion - contraction mechanism in an extended state. [Figure 4] It is a side view which shows the state where the expansion - contraction mechanism is extended. [Figure 5] It is a side view which shows the attitude change of the support base with respect to the base. [Figure 6] It is a perspective view which shows the expansion - contraction device which extended the expansion - contraction mechanism in the state where the tip of the support base was lowered and inclined. [Figure 7] It is a side view which shows the expansion - contraction device which extended the expansion - contraction mechanism in the state where the tip of the support base was lowered and inclined. [Figure 8] It is a figure which shows the method of raising a heavy object using the expansion - contraction device. [Figure 9] It is a figure which shows the expansion - contraction device to which a damper member is attached. [Figure 10] \It is a figure which shows the expansion - contraction device in the state where a heavy object is raised. [Figure 11] It is a figure which shows the expansion - contraction device in the state where a heavy object is raised on the loading platform of a cart. <% [Figure 12] It is a figure which shows the expansion - contraction device in 2nd Embodiment. [Figure 13] It is a figure which shows the state where the expansion - contraction device of 2nd Embodiment supports a heavy object in a lying - down state. [Figure 14] It is a figure which shows the state where the expansion - contraction device of 2nd Embodiment raises a heavy object.

Modes for Carrying Out the Invention

[0018] Preferred embodiments of the present invention will be described in detail below with reference to the drawings. In the drawings referred to below, common components are denoted by the same reference numerals, and redundant explanations of them will be omitted.

[0019] (First Embodiment) Figure 1 shows a telescopic device 1 in one embodiment of the present invention. This telescopic device 1 is suitable for use when raising heavy objects, such as distribution boards, from a horizontal position to an upright position. In other words, the telescopic device 1 can be used as a device for raising heavy objects. Note that the XYZ three-dimensional coordinate system shown in Figure 1 is a coordinate system in which the XY plane is the horizontal plane and the Z direction is the vertical direction, and is common to the coordinate systems shown in the other figures.

[0020] As shown in Figure 1, the telescopic device 1 comprises a pantograph-type telescopic mechanism 2 and a base 4 that holds the telescopic mechanism 2. The base 4 has a holding frame made of frame material assembled in a rectangular shape, and the telescopic mechanism 2 is held inside the holding frame. The base 4 is also equipped with wheels 5 at the four corners of the holding frame. Therefore, the base 4 can be moved while holding the telescopic mechanism 2. It is preferable to provide a locking mechanism on the wheels 5 of the base 4.

[0021] Figures 2 and 3 show the telescopic mechanism 2, with Figure 2 showing the telescopic mechanism 2 in a retracted state and Figure 3 showing the telescopic mechanism 2 in an extended state. As shown in Figure 3, the telescopic mechanism 2 includes a first telescopic mechanism 10, a second telescopic mechanism 20, connecting parts 31, 32, and 33, a support base 40, and a telescopic drive unit 50.

[0022] The first telescopic mechanism 10 has a plurality of first link members 11, 12, and 13. In this embodiment, an example is given in which the first telescopic mechanism 10 is composed of three first link members 11, 12, and 13. However, the number of first link members that constitute the first telescopic mechanism 10 is not limited to three.

[0023] The first telescopic mechanism 10 is formed to be extendable or retractable by the rotatable connection of the ends of three first link members 11, 12, and 13. One end of the first link member 11 is rotatably connected to one end of the first link member 12 via a rotating part 14. The other end of the first link member 12 is rotatably connected to one end of the first link member 13 via a rotating part 15. Therefore, the first telescopic mechanism 10 can be extended as shown in Figure 3 by rotating the rotating part 14 to widen the angle of the first link members 11 and 12, and by rotating the rotating part 15 to widen the angle of the first link members 12 and 13. Conversely, the first telescopic mechanism 10 can be retracted as shown in Figure 2 by rotating the rotating part 14 to decrease the angle of the first link members 11 and 12, and by rotating the rotating part 15 to decrease the angle of the first link members 12 and 13.

[0024] The second telescopic mechanism 20, like the first telescopic mechanism 10, has a plurality of second link members 21, 22, and 23. In this embodiment, an example is given in which the second telescopic mechanism 20 is composed of three second link members 21, 22, and 23. However, the number of second link members that constitute the second telescopic mechanism 20 is not limited to three. As shown in Figure 2, the three second link members 21, 22, and 23 of the second telescopic mechanism 20 are arranged to overlap each of the three first link members 11, 12, and 13 of the first telescopic mechanism 10.

[0025] The second telescopic mechanism 20 is formed to be extendable or retractable by the fact that the ends of three second link members 21, 22, and 23 are rotatably connected to each other. One end of the second link member 21 is rotatably connected to one end of the second link member 22 via a rotating part 24. The other end of the second link member 22 is rotatably connected to one end of the second link member 23 via a rotating part 25. Therefore, the second telescopic mechanism 20 can be extended as shown in Figure 3 by rotating the rotating part 24 to widen the angle of the second link members 21 and 22, and by rotating the rotating part 25 to widen the angle of the second link members 22 and 23. Conversely, the second telescopic mechanism 20 can be retracted as shown in Figure 2 by rotating the rotating part 24 to decrease the angle of the second link members 21 and 22, and by rotating the rotating part 25 to decrease the angle of the second link members 22 and 23.

[0026] The three first link members 11, 12, and 13 of the first telescopic mechanism 10 are connected to the three second link members 21, 22, and 23 of the second telescopic mechanism 20 by connecting parts 31, 32, and 33. The connecting parts 31, 32, and 33 rotatably connect the first link members 11, 12, and 13 and the second link members 21, 22, and 23, respectively. Connecting part 31 rotatably connects the first link member 11 and the second link member 21 to each other. Connecting part 32 rotatably connects the first link member 12 and the second link member 22 to each other. Connecting part 33 rotatably connects the first link member 13 and the second link member 23 to each other. In other words, the first telescopic mechanism 10 and the second telescopic mechanism 20 form a pantograph structure with the connecting parts 31, 32, and 33, and extend and retract in conjunction with each other.

[0027] The support base 40 supports the base ends of the first telescopic mechanism 10 and the second telescopic mechanism 20. The support base 40 is constructed as a frame, for example, by assembling frame material 41 in a rectangular shape. The support base 40 is provided with two of the first telescopic mechanisms 10 and two of the second telescopic mechanisms 20. The support base 40 supports the two first telescopic mechanisms 10 facing each other and also supports the two second telescopic mechanisms 20 facing each other.

[0028] As shown in Figure 3, the telescopic mechanism 2 has connecting bodies 16 and 17 that connect two opposing first telescopic mechanisms 10 to each other. The connecting body 16 connects the first link members 11, 11 of the two first telescopic mechanisms 10 to each other. A holding portion 16a that holds one end of the telescopic drive unit 50 is provided on the lower surface of the connecting body 16. The connecting body 17 connects the rotating portions 14, 14 of the two first telescopic mechanisms 10 in a manner that allows them to rotate relative to each other.

[0029] Furthermore, the telescopic mechanism 2 has connecting bodies 26 and 27 that connect the opposing second telescopic mechanisms 20 to each other. Connecting body 26 connects the rotating parts 24, 24 of the two second telescopic mechanisms 20 in a manner that allows them to rotate relative to each other. Connecting body 27 connects the rotating parts 25, 25 of the two second telescopic mechanisms 20 in a manner that allows them to rotate relative to each other. In addition, the telescopic mechanism 2 has a connecting body 34 that connects the connecting parts 32, 32 in a manner that allows them to rotate relative to each other, and a connecting body 35 that connects the connecting parts 33, 33 in a manner that allows them to rotate relative to each other. In this way, the telescopic mechanism 2 has high rigidity because it connects a pair of opposing first telescopic mechanisms 10 and a pair of opposing second telescopic mechanisms 20 to each other. The connecting body 34 is also provided with a holding part 34a that holds the other end of the telescopic drive part 50.

[0030] Furthermore, the telescopic mechanism 2 is provided with rotating parts 28, 28 at the tips of the two opposing second telescopic mechanisms 20, and roller members 29 are attached to these rotating parts 28, 28. The roller members 29 function as pressing members when raising heavy objects. For example, the surface of the roller members 29 is covered with an elastic material such as rubber, so as not to damage the sides of heavy objects.

[0031] The telescopic drive unit 50 is composed of, for example, a hydraulic cylinder and can push out and retract the cylinder rod. One end of the telescopic drive unit 50 is connected to a holding part 16a provided below the connecting body 16, and the other end is connected to a holding part 34a provided on the connecting body 34. The telescopic drive unit 50 lifts the holding part 34a by pushing out the cylinder rod. As a result, the telescopic mechanism 2 gradually extends from the retracted state. The telescopic drive unit 50 also lowers the holding part 34a by retracting the cylinder rod. As a result, the telescopic mechanism 2 gradually retracts from the extended state.

[0032] The support base 40 has support parts 42, 42 that support the base ends of a pair of first telescopic mechanisms 10 at predetermined support positions. The support parts 42, 42 pivotally support the base end 11a of the first link member 11 of the first telescopic mechanism 10. The support base 40 also slidably supports the base ends of a pair of second telescopic mechanisms 20. The second telescopic mechanism 20 has rollers mounted on the base end 21a of the second link member 21. As these rollers roll inside the frame material 41, the base end 21a of the second link member 21 moves toward or away from the support parts 42, 42.

[0033] For example, when the telescopic drive unit 50 extends the telescopic mechanism 2 from its retracted state, the first link members 11, 12, and 13 of the first telescopic mechanism 10 rise up, and the second link members 21, 22, and 23 of the second telescopic mechanism 20 rise up as well. Consequently, the base end 21a of the second link member 21 moves toward the base end 11a of the first link member 11. Also, when the telescopic drive unit 50 retracts the telescopic mechanism 2 from its extended state, the first link members 11, 12, and 13 of the first telescopic mechanism 10 tilt horizontally, and the second link members 21, 22, and 23 of the second telescopic mechanism 20 tilt horizontally as well. Consequently, the base end 21a of the second link member 21 moves toward the base end 11a of the first link member 11. The support base 40 supports the first telescopic mechanism 10 and the second telescopic mechanism 20 in this manner.

[0034] Figure 4 is a side view showing the telescopic mechanism 2 in an extended state. As shown in Figure 4, the connecting portion 31 is not located at the longitudinal center positions of the first link member 11 and the second link member 21, respectively. That is, the connecting portion 31 is located at a position away from the longitudinal center positions of the first link member 11 and the second link member 21, respectively. Specifically, the connecting portion 31 connects a connecting position of the first link member 11 that is closer to the rotating portion 14 from the longitudinal center position, and a connecting position of the second link member 21 that is closer to the base end portion 21a from the longitudinal center position.

[0035] Furthermore, the connecting portion 32 is not located at the longitudinal center of the first link member 12 and the second link member 22. In other words, the connecting portion 32 is located at a position away from the longitudinal center of the first link member 12 and the second link member 22. Specifically, the connecting portion 32 connects a connecting position of the first link member 12 that is closer to the rotating portion 14 from the longitudinal center of the first link member 12 with a connecting position of the second link member 22 that is closer to the rotating portion 25 from the longitudinal center of the second link member 22.

[0036] Furthermore, the connecting portion 33 is not located at the longitudinal center of the first link member 13 and the second link member 23, respectively. That is, the connecting portion 33 is located at a position away from the longitudinal center of the first link member 13 and the second link member 23, respectively. Specifically, the connecting portion 33 connects a connecting position located at the tip of the first link member 13 with a connecting position of the second link member 23 that is closer to the pivot portion 25 from the longitudinal center.

[0037] In other words, the connecting parts 31, 32, and 33 do not connect the first telescopic mechanism 10 and the second telescopic mechanism 20 at the center position of each link member, but rather connect the first telescopic mechanism 10 and the second telescopic mechanism 20 at an eccentric position away from the center position. Therefore, when the telescopic drive unit 50 pushes out the cylinder rod and changes the telescopic mechanism 2 from the retracted position to the extended position, the roller member 29 provided at the tip of the second telescopic mechanism 20 moves along the trajectory L1 shown in Figure 4. That is, the tip of the second telescopic mechanism 20 is lifted diagonally upward from a predetermined position on the upper surface of the support base 40. Similarly, the tip of the first telescopic mechanism 10 moves along the trajectory L2 shown in Figure 4. That is, the tip of the first telescopic mechanism 10 is also lifted diagonally upward from a predetermined position on the upper surface of the support base 40.

[0038] As described above, the telescopic mechanism 2 is formed as an eccentric pantograph mechanism that lifts the tips of the first telescopic mechanism 10 and the second telescopic mechanism diagonally upward. With this eccentric pantograph mechanism, the telescopic mechanism 2 is configured to raise a heavy object from a lying position to an upright position.

[0039] Returning to Figure 1, the side of the support base 40 is provided with connecting parts 43 and 44 that are supported by the base 4. The connecting part 43 is provided on the central upper surface of the frame material 41 provided on both the left and right sides of the support base 40. The connecting part 44 is provided on the tip side of the frame material 41 provided on both the left and right sides of the support base 40.

[0040] On the other hand, the base 4 is provided with support parts 47 and 48 at positions corresponding to the connecting parts 43 and 44. The support part 47 has a shaft member 47a, which is inserted into the connecting part 43. Therefore, the support base 40 is pivotally supported so as to be rotatable in the R direction around the shaft member 47a. The support part 48 has a retaining member 48a that can be attached to its center. The retaining member 48a is inserted and mounted on the support part 48 and the connecting part 44 to hold the support base 40 so as not to rotate relative to the base 4. When the retaining member 48a is removed from the support part 48 and the connecting part 44, the support base 40 becomes rotatable around the shaft member 47a. The base 4 is provided with a support part 49 at the lower part of the frame material 46. This support part 49 is provided at a position corresponding to the connecting part 44 when the support base 40 rotates and the tip of the support base 40 is tilted downward. Then, by attaching the holding member 48a to the support portion 49 and the connecting portion 44, the support base 40 maintains a posture in which its tip is tilted downward.

[0041] Figure 5 is a side view showing the change in the orientation of the support base 40 relative to the base 4. Figure 5(a) shows the support base 40 being held in a horizontal position. For example, when moving the telescopic device 1 to a site where a heavy object will be erected, the support base 40 is held in a horizontal position as shown in Figure 5(a).

[0042] Figure 5(b) shows the support base 40 in a downward-sloping position. This telescopic device 1 is used with the support base 40 in a downward-sloping position, as shown in Figure 5(b), when erecting heavy objects.

[0043] Figure 6 is a perspective view showing the telescopic device 1 with the telescopic mechanism 2 extended while the tip of the support base 40 is tilted downwards. Figure 7 is a side view showing the telescopic device with the telescopic mechanism 2 extended while the tip of the support base 40 is tilted downwards. By extending the telescopic mechanism 2 while the support base 40 is tilted, the telescopic device 1 can push the roller member 29 provided at the tip of the telescopic mechanism 2 further outwards than the installation space of the base 4. That is, as shown in Figure 7, when the telescopic mechanism 2 is extended, the telescopic device 1 can push the roller member 29 to a predetermined position P2 further forward than the tip position P1 of the base 4. Therefore, when standing up a heavy object, by placing the bottom corner of the heavy object at a position on the floor corresponding to the position P2 to which the roller member 29 can be pushed, the telescopic device 1 can stand the heavy object upright by extending the telescopic mechanism 2.

[0044] Figures 8 to 10 illustrate a method for erecting and installing a heavy object 100 using the telescopic device 1 described above. Heavy objects 100, such as distribution boards, are transported to the installation site inside a building in a horizontal position. If the heavy object 100 is an distribution board, its weight may exceed 300 kg, making it difficult for workers to manually erect it. Therefore, the heavy object 100, which has been transported to the installation site in a horizontal position, is placed on a conveyor 59 of a predetermined height. This conveyor 59 is configured, for example, as a roller conveyor, and is capable of moving the heavy object 100 horizontally. A telescopic device 1 with the tip of a support base 40 tilted downwards is installed at the end of the conveyor 59. At this time, the wheels 5 of the telescopic device 1 are locked.

[0045] As shown in Figure 8, the heavy object 100 is moved horizontally in the X direction from the conveyor 59. As a result, the heavy object 100 is set up in a state supported by the telescopic mechanism 2 of the telescopic device 1. At this time, the heavy object 100 supported by the telescopic mechanism 2 is in a tilted, lying-on-side position. In other words, the heavy object 100 is in a tilted, lying-on-side position because the corners of its bottom surface are in contact with the floor surface and its sides are supported by the roller members 29.

[0046] As shown in Figure 9, the telescopic device 1 is equipped with a damper member 60. This damper member 60 is attached to the telescopic device 1 and the heavy object 100 when the heavy object 100 is supported by the telescopic mechanism 2 of the telescopic device 1. The damper member 60 comprises a cylinder 61 and a rod 62, and a viscous fluid is sealed inside. The viscous fluid may be a liquid or a gas. The rod 62 is slidable relative to the cylinder 61. For example, when the rod 62 is pulled out from inside the cylinder 61, the viscous fluid inside provides resistance, and the pulling speed of the rod 62 is kept below a certain speed. The damper member 60 comprises a wire 63 connected to the tip of the rod 62 and a wire 64 connected to the end of the cylinder 61. The other end of the wire 63 is connected to an engagement part 110 attached to the upper surface of the heavy object 100, for example. The other end of the wire 64 is connected to the base 4 of the telescopic device 1, for example. The other end of the wire 64 may be connected to the support base 40 of the telescopic device 1.

[0047] The telescopic device 1 is driven by the telescopic drive unit 50 with the damper member 60 attached as described above. The telescopic drive unit 50 may be driven manually or electrically. When the telescopic drive unit 50 is driven, the telescopic mechanism 2 extends. At this time, the roller member 29 pushes the side of the heavy object 100 diagonally upward, so the heavy object 100 changes from a lying position to an upright position. As the heavy object 100 changes from a lying position to an upright position, the contact position of the roller member 29 with respect to the heavy object 100 is displaced. At this time, the roller member 29 rotates, so the telescopic mechanism 2 can change the heavy object 100 to an upright position without damaging the side of the heavy object 100.

[0048] Furthermore, when the telescopic mechanism 2 extends and the heavy object 100 rises to a predetermined angle, the heavy object 100 attempts to return to an upright position under its own weight. At this time, the damper member 60 applies tension to the wires 63 and 64, reducing the speed at which the rod 62 is pulled out from the cylinder 61. Therefore, the damper member 60 mitigates the impact when the heavy object 100 returns to an upright position under its own weight. In other words, the damper member 60 prevents the heavy object 100 from rapidly changing to an upright position after rising to a predetermined angle, and instead allows the heavy object 100 to change to an upright position slowly.

[0049] The telescopic device 1 extends the telescopic mechanism 2, thereby changing the weight object 100 to an upright position, as shown in Figure 10. Just before the weight object 100 reaches the upright position, the damper member 60 suppresses the change in the weight object 100's posture to below a certain speed, while the telescopic mechanism 2 raises the weight object 100 to an upright position. As a result, the telescopic device 1 can raise the weight object 100 to an upright position while mitigating the impact when the bottom surface of the weight object 100 contacts the floor. Consequently, the telescopic device 1 can also prevent damage to the weight object 100. After that, the weight object 100 is installed in the designated location while remaining in the upright position.

[0050] Furthermore, as shown in Figure 11, the telescopic device 1 may also be used to erect the heavy object 100 on the platform of the trolley 150. For example, if it is not possible to erect the heavy object 100 at a location close to the installation site, the telescopic device 1 can erect the heavy object 100 on the platform of the trolley 150. The worker then moves the trolley 150 to transport the heavy object 100 to the installation site in an upright position. Once the trolley 150 is moved to the installation site, the worker moves the heavy object 100 from the platform of the trolley 150 to the installation site in an upright position and secures it. In this way, the telescopic device 1 can be used to place the heavy object 100 in an upright position on the platform of the trolley 150. Therefore, the telescopic device 1 can also be used when erecting the heavy object 100 at a location far from the installation site.

[0051] As described above, in this embodiment, when the first telescopic mechanism 10 and the second telescopic mechanism 20 are extended, the tips of the first telescopic mechanism 10 and the second telescopic mechanism 20 are lifted diagonally upward from a predetermined position on the upper surface of the support base 40, making it possible to stand the heavy object 100 upright. Therefore, this telescopic device 1 does not require the placement of a chain block or the like at a position higher than the height dimension of the heavy object 100, as in the conventional method, and can stand the heavy object 100 from a lying position to an upright position in a space-saving manner. In addition, this telescopic device 1 has the advantage of being able to efficiently stand the heavy object 100 upright because it does not take much time to set up.

[0052] In this embodiment, the heavy object 100 that the telescopic device 1 erects is assumed to be, for example, an object weighing more than 100 kg. However, the heavy object 100 is not necessarily limited to an object weighing more than 100 kg. In other words, the heavy object 100 may be an object weighing less than 100 kg.

[0053] (Second Embodiment) Next, a second embodiment of the present invention will be described. In the first embodiment described above, the telescopic device 1 does not support the bottom corners of the heavy object 100 when raising the heavy object 100. Therefore, if the floor surface on which the heavy object 100 is raised is slippery, the heavy object 100 may slide sideways, making it impossible to raise the heavy object 100. In this embodiment, a telescopic device 1 equipped with a structure that can prevent the heavy object 100 from sliding sideways will be described.

[0054] Figure 12 shows the telescopic device 1 in the second embodiment. This telescopic device 1 has a pair of arm members 71, 71 attached to the side of the base 4. The pair of arm members 71, 71 are rotatable relative to the side of the base 4 and can change their position between a state where they are housed on the upper side of the base 4 and a state where they protrude forward of the base 4. Figure 12 illustrates the state in which the pair of arm members 71, 71 protrude forward of the base 4.

[0055] The tips 71a of the pair of arm members 71, 71 are provided with engaging members 72 that engage with the bottom corners of the heavy object 100. For example, the engaging member 72 is made of an angle material with an L-shaped cross-section, and the bottom corners of the heavy object 100 are engaged with the inside of the L-shaped portion. This engaging member 72 is rotatable around the axis of the tips 71a of the arm members 71, 71. Other aspects of the telescopic device 1 are the same as those described in the first embodiment.

[0056] Figure 13 shows the state in which the heavy object 100 is supported by the telescopic device 1 in a lying position in this embodiment. As shown in Figure 13, when the telescopic device 1 supports the heavy object 100 in a lying position, the engaging member 72 engages with the bottom corner of the heavy object 100 to provide support. The telescopic device 1 extends the telescopic mechanism 2 from the state shown in Figure 13, raising the heavy object 100 to an upright position. At this time, the engaging member 72 is engaged with the bottom corner of the heavy object 100, preventing the bottom corner of the heavy object 100 from sliding sideways. Therefore, the heavy object 100 rotates around the bottom corner engaged with the engaging member 72 as a pivot point and rises, changing to the upright position shown in Figure 14.

[0057] Thus, the telescopic device 1 of this embodiment is equipped with an engaging member 72 that engages with and rotates at the bottom corner portion of the heavy object 100 that contacts the floor surface. Therefore, this telescopic device 1 can prevent the heavy object 100 from sliding sideways along the floor surface when the heavy object 100 is raised upright. Accordingly, the telescopic device 1 of this embodiment is configured to raise the heavy object 100 to an appropriate position.

[0058] (modified version) The above exemplifies preferred embodiments of the present invention. However, the present invention is not limited to those described in the above embodiments. That is, the present invention can be applied to various modifications other than those described in the above embodiments.

[0059] For example, in the above embodiment, an example was described in which a roller member 29 is attached to the tip of the second telescopic mechanism 20 to press down on and upright a heavy object 100. However, the roller member 29 that presses down on and uprights the heavy object 100 may be attached to the tip of the first telescopic mechanism 10 instead of the tip of the second telescopic mechanism 20.

[0060] Furthermore, in the above embodiment, an example configuration was described in which the telescopic drive unit 50 extends the telescopic mechanism 2 by pushing out the cylinder rod. However, by changing the connection positions at both ends of the telescopic drive unit 50, it is also possible to extend the telescopic mechanism 2 by having the telescopic drive unit 50 retract the cylinder rod. Therefore, the telescopic drive unit 50 is not necessarily limited to an example configuration in which the telescopic mechanism 2 is extended by pushing out the cylinder rod.

[0061] Furthermore, in the above embodiment, an example was described in which the telescopic drive unit 50 is composed of a hydraulic cylinder. However, the telescopic drive unit 50 is not necessarily limited to a hydraulic cylinder. For example, the telescopic drive unit 50 may be composed of a spiral lift or the like.

[0062] Furthermore, in the above embodiment, an example of using the telescopic device 1 as a device for lifting heavy objects was described. However, the telescopic device 1 described above can be used for purposes other than lifting heavy objects. That is, by extending the first telescopic mechanism 10 and the second telescopic mechanism 20, the tips of the first telescopic mechanism 10 and the second telescopic mechanism 20 can be lifted diagonally upward from a predetermined position on the upper surface of the support base 40, and by contracting the first telescopic mechanism 10 and the second telescopic mechanism 20, the tips of the first telescopic mechanism 10 and the second telescopic mechanism 20 can be returned from the diagonally upward position on the support base 40 to the predetermined position on the upper surface of the support base 40. Therefore, the telescopic mechanism 1 described above can also be used as a mechanism for moving an object diagonally upward or diagonally downward by extending or contracting the first telescopic mechanism 10 and the second telescopic mechanism 20. [Explanation of Symbols]

[0063] 1... Telescopic device, 2... Telescopic mechanism, 4... Base, 5... Wheel, 10... First telescopic mechanism, 11, 12, 13... First link member, 20... Second telescopic mechanism, 21, 22, 23... Second link member, 31, 32, 33... Connecting part, 40... Support base, 50... Telescopic drive unit, 50... Damper member, 72... Engaging member, 100... Heavy object.

Claims

1. A first telescopic mechanism having a plurality of first link members, the ends of the plurality of first link members being rotatably connected to each other so as to be expandable and contractible, A second telescopic mechanism having a plurality of second link members arranged to overlap the plurality of first link members, and the ends of the plurality of second link members being rotatably connected to each other so as to be expandable and contractible, A connecting portion that connects the first link member and the second link member so that they can rotate relative to each other at a connecting position away from the respective longitudinal center positions of the first link member and the second link member, A support base that pivotally supports the base end of the first telescopic mechanism at a predetermined support position, and slidably supports the base end of the second telescopic mechanism toward the support position, Equipped with, An extendable device characterized in that, when the first extendable mechanism and the second extendable mechanism are extended, the connecting portion rotates the first link member and the second link member relative to each other at the connecting position, thereby causing the tips of the first extendable mechanism and the second extendable mechanism to be lifted diagonally upward from a predetermined position on the upper surface of the support base.

2. The telescopic device according to claim 1, characterized in that the tips of the first telescopic mechanism and the second telescopic mechanism are lifted diagonally upward to erect a heavy object.

3. A telescopic drive unit for extending or contracting the first telescopic mechanism and the second telescopic mechanism, The expandable device according to claim 1, further comprising the following:

4. A base for holding the support base, The expandable device according to claim 2, further comprising the following:

5. The telescopic device according to claim 4, characterized in that the base is capable of switching the support base between a horizontal position and an inclined position, and when the first telescopic mechanism and the second telescopic mechanism are extended, the support base is held in the inclined position.

6. A damper member having one end connected to the upper part of the heavy object and the other end connected to the support base or the base, Furthermore, The expandable device according to claim 4, characterized in that the damper member mitigates the impact when the heavy object assumes an upright position.

7. An engaging member that engages with the bottom corner portion of the heavy object that contacts the floor surface and rotates, The expandable device according to claim 2, further comprising the following:

8. A method for installing heavy objects, The aforementioned heavy object is transported to the installation site in a horizontal position. A method for setting up a heavy object, characterized by raising the heavy object, which is lying on its side, to an upright position using the telescopic device described in any one of claims 1 to 7, and then installing it at a predetermined installation location.

9. The aforementioned telescopic device raises the heavy object upright on the platform of the trolley, By moving the trolley, the heavy object is transported to the installation location in an upright position. The method for installing a heavy object according to claim 8, characterized in that the heavy object is installed by moving the heavy object from the loading platform of the trolley to the installation location in an upright position and fixing it there.

Images