attachment

Abstract

To provide an attachment which can be easily and appropriately disposed at a lift-up point of a vehicle.SOLUTION: The attachment disposed between a vehicle and a lift for vehicle lifting comprises: a rubber block; and an attaching member attached to the side surface of the rubber block. The attaching member is provided with a magnet attached to / detached from the bottom surface of the vehicle, and a first elastic body that vertically displaces the position of the top surface of the magnet in accordance with a load from the vehicle.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an attachment that is disposed between a vehicle and a lift for raising and lowering the vehicle. [Background technology]

[0002] Patent Document 1 discloses a lift for vehicle maintenance. This lift includes a lift table that is raised and lowered by a lifting device, and a slide table that is stored in the lift table and can move forward and backward. The slide table is provided so as to be compatible with various vehicles with different wheelbases. The lift-up point of the vehicle differs depending on the wheelbase. An attachment made of an elastic material such as rubber is disposed between the lift-up point of the vehicle and the lift table or the slide table. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-222096 A Summary of the Invention [Problem to be solved by the invention]

[0004] It is desirable to properly and easily place an attachment at a lift-up point determined for each vehicle. In order to properly place an attachment at a lift-up point, it is necessary to adjust the position while gradually raising the lift table and checking whether the attachment is placed between the lift-up point of the vehicle and the lift table or slide table. This position adjustment is performed while looking under the vehicle. There are usually four lift-up points per vehicle, one each on the left and right, front and rear. Since the position adjustment is performed for each lift-up point of each vehicle, it takes time, and the posture of looking under the vehicle is physically burdensome for the worker.

[0005] SUMMARY OF THE PRESENT EMBODIMENT One object of the present invention is to provide an attachment that can be conveniently and easily placed at a lift-up point on a vehicle. [Means for solving the problem]

[0006] An attachment according to one embodiment of the present invention is an attachment that is placed between a vehicle and a lift for raising and lowering the vehicle, and comprises a rubber block and an attachment member attached to a side of the rubber block, the attachment member comprising a magnet that is attached and detached to the underside of the vehicle, and a first elastic body that displaces the position of the upper surface of the magnet in the vertical direction in response to the load from the vehicle. Effect of the Invention

[0007] The attachment of the present invention is attached to the lift-up point of the vehicle by a magnet. When attached by a magnet, the attachment can be properly attached to the lift-up point of the vehicle in one go. With the attachment of the present invention, there is no need to adjust the position multiple times for one lift-up point, and work time can be shortened. Reducing the number of position adjustments also reduces physical strain. If the lift-up points are known to a certain extent, the attachment can be attached to the vehicle by the magnet without having to look under the vehicle to check, which is expected to improve working posture.

[0008] The position of the top surface of the magnet moves up and down depending on the load of the vehicle, so it moves down along with the position of the top surface of the rubber block. Even if the rubber block is compressed and displaced by the load of the vehicle, the top surface of the magnet and the top surface of the rubber block remain flush. Therefore, when the load of the vehicle acts on the attachment, the rubber block can properly support the lift-up point of the vehicle. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is an explanatory diagram illustrating a first state of the attachment of the first embodiment. [Diagram 2] FIG. 2 is an explanatory diagram illustrating a second state of the attachment according to the first embodiment. [Diagram 3] FIG. 3 is an explanatory diagram illustrating a third state of the attachment according to the first embodiment. [Figure 4] FIG. 4 is a diagram showing the internal structure of the mounting member of the attachment of embodiment 1-1 in the first state. [Diagram 5] FIG. 5 is a diagram showing the internal structure of the mounting member of the attachment of embodiment 1-1 in a third state. [Figure 6] FIG. 6 is an explanatory diagram for explaining how to return the attachment of embodiment 1-1 from the third state to the first state. [Figure 7] FIG. 7 is a diagram showing the internal structure of the mounting member of the attachment of embodiment 1-2 in the first state. [Figure 8] FIG. 8 is a diagram showing the internal structure of the mounting member of the attachment of embodiment 1-2 in the second state. [Figure 9] FIG. 9 is an explanatory diagram for explaining how to return the attachment of embodiment 1-2 from the third state to the first state. [Figure 10] FIG. 10 is a diagram showing the internal structure of the mounting member of the attachment of the second embodiment in the first state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] A specific example of the attachment of the present invention will be described with reference to the drawings. The same reference numerals in the drawings indicate the same objects. In each drawing, for the convenience of explanation, some of the components may be exaggerated or simplified. The dimensional ratios of each part in the drawings may also differ from the actual ones.

[0011] <Overall composition> As shown in Figs. 1 to 3, the attachment 1 of the embodiment is disposed between the vehicle 10 and the lift 100. The lift 100 raises and lowers the vehicle 10. The vehicle 10 is supported by a table 110 of the lift 100. A lift-up point of the vehicle 10 is determined for each vehicle. The attachment 1 includes a rubber block 2. The rubber block 2 is disposed so as to prevent the lift 100 from damaging the vehicle 10 when lifting up the vehicle 10.

[0012] FIG. 1 shows a first state in which the load from the vehicle 10 is not acting on the attachment 1. The first state is a state before the lift 100 rises, for example, when the lift 100 is stopped at the lowest position. FIG. 2 shows a second state in which the maximum load from the vehicle 10 is acting on the attachment 1. In the second state, the lift 100 is raised and the table 110 supports the entire load of the vehicle 10. FIG. 3 shows a third state in which the lift 100 descends from the second state and the load from the vehicle 10 is not acting on the attachment 1. In the third state, the lift 100 descends and, for example, when the lift 100 is stopped at the lowest position. The black arrows shown in FIGS. 2 and 3 indicate the operation direction of the lift 100. The rubber block 2 is in a non-compressed state in each of the first state and the third state, and is in a compressed state in the second state. The left-right direction in FIGS. 1 to 3 corresponds to the vehicle length direction of the vehicle 10.

[0013] One of the features of the attachment 1 of the embodiment is that it includes a mounting member 3. The mounting member 3 is attached to the side of the rubber block 2 as shown in Figs. 1 to 3. The mounting member 3 of this example is attached to both the front and rear surfaces of the rubber block 2 when the rubber block 2 is disposed between the vehicle 10 and the lift 100. The mounting member 3 includes a magnet 4 and a first elastic body 5 as shown in Figs. 4 to 10. The magnet 4 is attached to and detached from the lower surface of the vehicle 10. When the magnet 4 sticks to the lower surface of the vehicle 10, the attachment 1 is fixed to the vehicle 10 as shown in Fig. 1. When the magnet 4 is removed from the lower surface of the vehicle 10, the attachment 1 is removed from the vehicle 10 as shown in Fig. 3. The first elastic body 5 displaces the position of the upper surface 40 of the magnet 4 in the vertical direction according to the load from the vehicle 10.

[0014] <Embodiment 1> In the attachment 1 of the first embodiment, in each of the first state shown in FIG. 1, the second state shown in FIG. 2, and the third state shown in FIG. 3, the positional relationship between the upper surface 20 of the rubber block 2 and the upper surface 40 of the magnet 4 is as follows. In the first state, the upper surface 40 of the magnet 4 is flush with the upper surface 20 of the rubber block 2 or is located above the upper surface 20 of the rubber block 2. In the first state of this example, the upper surface 40 of the magnet 4 is located above the upper surface 20 of the rubber block 2. In the second state, the upper surface 40 of the magnet 4 is flush with the upper surface 20 of the rubber block 2. In the third state, the upper surface 40 of the magnet 4 is located below the upper surface 20 of the rubber block 2. The mounting member 3 of the attachment 1 of the first embodiment is provided with a holding mechanism that holds the magnet 4 in a state in which the upper surface 40 of the magnet 4 is located below the upper surface 20 of the rubber block 2. In other words, the holding mechanism holds the magnet 4 in the third state. The holding mechanism may be the holding mechanism 6 of embodiment 1-1 described with reference to FIGS. 4 to 6, or the holding mechanism 7 of embodiment 1-2 described with reference to FIGS.

[0015] The holding mechanism 6 of the embodiment 1-1 includes a shaft 61, a lever 65, and a second elastic body 67. The shaft 61 is connected to the magnet 4. The lever 65 is a swingable member extending in a direction intersecting the shaft 61, and includes a hole 651h through which the shaft 61 passes. The first elastic body 5 is a compression spring disposed on the outer periphery of the shaft 61 between the magnet 4 and the lever 65. The second elastic body 67 presses the lever 65 so as to maintain a state in which two opposing points on the side surface of the shaft 61 are abutted against the inner periphery 651he of the hole 651h. The holding mechanism 6 of the embodiment 1-1 includes a structure that utilizes a swivel hook.

[0016] The holding mechanism 7 of the embodiment 1-2 includes a shaft 71 and a stopper 75. The shaft 71 is connected to the magnet 4. The stopper 75 includes a cylindrical portion 751 having a bottom 751b, an axis portion 752 disposed inside the cylindrical portion 751, and a second elastic body 77 disposed between the bottom 751b and an end face of the axis portion 752. The cylindrical portion 751 and the axis portion 752 each include holes 751h and 752h through which the shaft 71 passes. The second elastic body 77 presses the axis portion 752 against the shaft 71. The first elastic body 5 is a compression spring disposed on the outer periphery of the shaft 71 between the magnet 4 and the cylindrical portion 751. The holding mechanism 7 of the embodiment 1-2 includes a structure that applies a string stopper.

[0017] The magnet 4 in this example is a permanent magnet. The shape of the magnet 4 in this example is hemispherical. When the magnet 4 is hemispherical, the contact point between the magnet 4 and the underside of the vehicle 10 is easily secured. For example, when the upper surface 40 of the magnet 4 is a plane perpendicular to the axial direction of the shaft 71, if the side of the rubber block 2 is inclined, the upper surface 40 of the magnet 4 and the underside of the vehicle 10 become non-parallel, and the upper surface 40 of the magnet 4 is difficult to contact the underside of the vehicle 10. When the upper surface 40 of the magnet 4 is a spherical surface, the upper surface of the magnet 4 is easily appropriately contacted with the underside of the vehicle 10 regardless of the inclination angle of the side of the rubber block 2. The magnetic force of the magnet 4 can be appropriately selected within a range in which the attachment 1 is kept fixed to the underside of the vehicle 10 in the first state, and in the process of transitioning from the second state to the third state, the adhesive force of the magnet 4 against the vehicle 10 is smaller than the repulsive force when the rubber block 2 returns from the compressed state to the uncompressed state. If the attractive force is smaller than the repulsive force, when the lift 100 is lowered from the second state to the third state, the magnet 4 comes off the underside of the vehicle 10, and the attachment 1 comes off the vehicle 10, as shown in FIG.

[0018] A conventional structure can be referred to for the rubber block 2. The shape of the rubber block 2 in this example is trapezoidal when viewed from the side. The side surface of the rubber block 2 in this example is inclined with respect to the vertical direction.

[0019] <Embodiment 1-1> As shown in Fig. 4 to Fig. 6, the mounting member 3 in the attachment 1 of embodiment 1-1 includes a magnet 4, a first elastic body 5, a holding mechanism 6, and a case 9. Fig. 4 shows the mounting member 3 in a first state. Fig. 5 shows the mounting member 3 in a second state. Fig. 6 shows the mounting member 3 in a third state.

[0020] 〔magnet〕 The magnet 4 is attached to the support 45 so that the top surface 40 is exposed. A hole 46 is provided in the lower part of the support 45. The hole 46 is a threaded blind hole. A first end 611 of a shaft 61, which will be described later, is attached to the hole 46. The magnet 4 is located on the axis of the shaft 61. The top surface 40 of the magnet 4 is located outside the case 9. A part of the support 45 is located inside the case 9.

[0021] [First elastic body] The first elastic body 5 is a compression spring. The first elastic body 5 is disposed on the outer periphery of the shaft 61 between the magnet 4 and the lever 65 described later. The first elastic body 5 in this example is abutted against the end face of the support 45 that supports the magnet 4. The outer diameter of the first elastic body 5 is smaller than the outer diameter of the support 45. The outer diameter of the first elastic body 5 is also larger than the inner diameter of the hole 651h provided in the lever 65. In this example, the inner diameter of the first elastic body 5 is also larger than the inner diameter of the hole 651h. The first elastic body 5 expands and contracts between the support 45 and the lever 65 in response to the load of the vehicle 10. The first elastic body 5 displaces the position of the upper surface 40 of the magnet 4 in the vertical direction in response to the load of the vehicle 10. In the first state, the first elastic body 5 is in an initial state in which it is slightly compressed from its natural length with the total weight of the magnet 4, the support 45, and the shaft 61 acting as a load. In the second state and the third state, the first elastic body 5 is further compressed from the compression in the first state. The first elastic body 5 is located inside the case 9 .

[0022] [Holding mechanism] The holding mechanism 6 includes a shaft 61, a lever 65, and a second elastic body 67. The holding mechanism 6 holds the magnet 4 at the position of the upper surface 40 of the magnet 4 displaced by the first elastic body 5. In the first state, the holding mechanism 6 holds the magnet 4 in a state in which the upper surface 40 of the magnet 4 is flush with the upper surface 20 of the rubber block 2 or located higher than the upper surface 20 of the rubber block 2. In the second state, the holding mechanism 6 holds the magnet 4 in a state in which the upper surface 40 of the magnet 4 is flush with the upper surface 20 of the rubber block 2. In the third state, the holding mechanism 6 holds the magnet 4 in a state in which the upper surface 40 of the magnet 4 is located lower than the upper surface 20 of the rubber block 2. The holding mechanism 6 is located inside the case 9.

[0023] The shaft 61 is a rod-shaped member having a first end 611 and a second end 612. The shaft 61 is, for example, a round bar member. The first end 611 is, for example, a threaded male screw. The first end 611 is threadedly coupled to a hole 46 of the support 45. The shaft 61 is connected to the magnet 4 by coupling the first end 611 to the support 45. The second end 612 has a flange protruding radially outward from the shaft 61. The outer diameter of the flange is larger than the inner diameter of a hole 651h provided in the lever 65 described later. The flange serves to prevent the shaft 61 from slipping out upward from the hole 651h.

[0024] The lever 65 is a swingable member extending in a direction intersecting the shaft 61. The lever 65 in this example is a plate-shaped member. The fulcrum 655 of the lever 65 is formed of an axis perpendicular to the paper plane of Figs. 4 to 6, and is fixed to the case 9 described later. The lever 65 has a first end 651 and a second end 652. The first end 651 is provided with a hole 651h through which the shaft 61 passes. The inner diameter of the hole 651h is slightly larger than the outer diameter of the shaft 61. The second end 652 is located outside the case 9 through a hole 92h provided in the case 9 described later. The lever 65 is inclined by a second elastic body 67 described later. In the lever 65 in this example, the first end 651 is located at the top, and the second end 652 is located at the bottom. Due to this inclination, two opposing points on the side of the shaft 61 are abutted against the inner peripheral edge 651he of the hole 651h. The shaft 61 is held by the lever 65 by this abutment.

[0025] The second elastic body 67 is a compression spring. The second elastic body 67 is disposed between the lever 65 and an upper portion 91 of the case 9, which will be described later. A part of the second elastic body 67 is fitted into a recess 91c provided in the upper portion 91. The second elastic body 67 presses the lever 65 between the second end 652 and the fulcrum 655 from above the lever 65. As described above, the second elastic body 67 presses the lever 65, so that the state in which two opposing points on the side surface of the shaft 61 are abutted against the inner periphery 651he of the hole 651h of the lever 65 is maintained. The second elastic body 67 is in a compressed state in all of the first state, the second state, and the third state. The second elastic body 67 has a spring constant sufficient to press the second end 652 of the lever 65 downward when the total weight of the magnet 4, the support 45, the shaft 61, and the first elastic body 5 acts as a load on the first end 651 of the lever 65.

[0026] 〔case〕 The case 9 houses the support 45 supporting the magnet 4, the first elastic body 5, and most of the holding mechanism 6. The case 9 of this example has an upper part 91 and a side part 92. The upper part 91 has a hole 91h through which the support 45 penetrates. A part of the upper part 91 is thickened toward the inside of the case 9. This thickened part has a recess 91c that opens toward the inside of the case 9. A part of the second elastic body 67 is fitted into the recess 91c. The side part 92 has a hole 92h through which the second end 652 of the lever 65 penetrates. The hole 92h has a size that allows the second end 652 to move freely up and down. The case 9 of this example opens downward. If the case 9 has an opening, it is easy to repair the internal structure of the mounting member 3 when a defect occurs. The case 9 may have a bottom that closes the opening at the bottom. If the case 9 has a bottom, it is easy to prevent foreign matter such as dust from entering the inside of the case 9.

[0027] The case 9 is fixed to the rubber block 2 by, for example, screwing the mounting member 3 to the rubber block 2 .

[0028] [How to use the attachment] As shown in Fig. 1, when the lift 100 is in a lowered state, for example when the lift 100 is stopped at the lowest position, the attachment 1 is attached to the underside of the vehicle 10. The attachment 1 is attached by attracting the magnets 4 to each of the four lift-up points determined for each vehicle 10. At this time, no load from the vehicle 10 is acting on the attachment 1. This state is the first state. When the magnets 4 are attracted to the vehicle 10, the attachment 1 is attached in a state where it is hanging from the vehicle 10.

[0029] As shown in Fig. 2, once the attachment 1 is attached, the lift 100 is raised. The lift 100 is raised until the table 110 supports the vehicle 10. When the table 110 supports the vehicle 10, the maximum load from the vehicle 10 acts on the attachment 1. In other words, the rubber block 2 is in a state where it is most compressed by the load of the vehicle 10. This state is the second state.

[0030] As shown in Fig. 3, when inspection or maintenance of the vehicle 10 is completed, the lift 100 is lowered to the lowest position. When the lift 100 is lowered to the lowest position, the load from the vehicle 10 does not act on the attachment 1. At this time, the magnet 4 cannot be attracted to the underside of the vehicle 10, and the attachment 1 comes off from the underside of the vehicle 10. This state is the third state.

[0031] [Effect] In the first state, as shown in FIG. 4, the first elastic body 5 is in the initial state, and the upper surface 40 of the magnet 4 is located at the uppermost position. The second elastic body 67 presses the lever 65, and two opposing points on the side of the shaft 61 are abutted against the inner peripheral edge 651he of the hole 651h. Due to this abutment, the shaft 61 is held by the lever 65 with the upper surface 40 of the magnet 4 located at the uppermost position. In the first state, as shown in FIG. 1, the magnet 4 is held in a state in which the upper surface 40 of the magnet 4 is located above the upper surface 20 of the rubber block 2. Therefore, in the first state, the magnet 4 sticks to the lower surface of the vehicle 10, and the attachment 1 is fixed to the vehicle 10.

[0032] In the second state, as shown in FIG. 2, the rubber block 2 is compressed between the vehicle 10 and the lift 100, and the magnet 4 receives a load from the vehicle 10. In response to this load, the position of the upper surface 40 of the magnet 4 is displaced downward. Specifically, the shaft 61 is lowered by the load, and the position of the upper surface 40 of the magnet 4 is displaced downward. When the upper surface 40 of the magnet 4 is displaced downward, the first elastic body 5 is compressed between the support body 45 and the lever 65, as shown in FIG. 5. Even in the second state, the second elastic body 67 presses the lever 65, and two opposing points on the side surface of the shaft 61 are abutted against the inner periphery 651he of the hole 651h. Due to this abutment, the shaft 61 is held by the lever 65 even in the compressed state of the first elastic body 5. In the second state, as shown in FIG. 2, the magnet 4 is held in a state in which the upper surface 40 of the magnet 4 is flush with the upper surface 20 of the rubber block 2. In the second state, the magnet 4 remains attached to the lower surface of the vehicle 10.

[0033] In the third state, as shown in FIG. 3, the rubber block 2 does not receive the load from the vehicle 10 and returns from the compressed state to the uncompressed state. In the third state, as shown in FIG. 5, the shaft 61 remains held by the lever 65 with the first elastic body 5 in a compressed state. Therefore, in the third state, as shown in FIG. 3, the upper surface 40 of the magnet 4 is located below the upper surface 20 of the rubber block 2. Due to the distance D between the upper surface 40 of the magnet 4 and the upper surface 20 of the rubber block 2, the magnet 4 does not exert a sufficient attraction force to attract the attachment 1 to the lower surface of the vehicle 10. Therefore, in the third state, the magnet 4 comes off from the lower surface of the vehicle 10, and the attachment 1 comes off from the vehicle 10.

[0034] When returning the mounting member 3 from the third state to the first state, as shown in FIG. 6, the second end 652 of the lever 65 is lifted upward. At this time, the second elastic body 67 is further compressed by the lever 65. When the second end 652 is lifted upward, the first end 651 is lowered, and the abutment against the inner periphery 651he of the hole 651h by two opposing points on the side surface of the shaft 61 is released. When the abutment is released, the first elastic body 5 is stretched, the shaft 61 moves upward, and the upper surface 40 of the magnet 4 is positioned at the uppermost position. The white arrow in FIG. 6 indicates the movement direction of the shaft 61. When the lifting of the second end 652 is released, the mounting member 3 returns to the first state.

[0035] 〔effect〕 In the first state, the magnet 4 is held in a state where the upper surface 40 of the magnet 4 is positioned above the upper surface 20 of the rubber block 2, so that the magnet 4 sticks to the lower surface of the vehicle 10 and the attachment 1 is fixed to the vehicle 10. If the attachment is made by the magnet 4, the attachment 1 can be properly attached to the lift-up point of the vehicle 10 in one go. In the second state, the upper surface 40 of the magnet 4 is displaced downward in response to the load of the vehicle 10, so that the upper surface 20 of the rubber block 2 can properly support the vehicle 10. In the third state, the attachment 1 is always detached from the vehicle 10 by the mechanical mechanism of the mounting member 3, so that it is possible to prevent forgetting to remove the attachment 1. To change from the second state to the third state, it is only necessary to lower the lift 100, and the worker does not need to perform any operation on the mounting member 3. The mounting member 3 can be returned from the third state to the first state by simply operating the lever 65, which is easy to operate.

[0036] Since the mounting member 3 is attached to the side of the rubber block 2, the mounting member 3 is not easily affected by the elastic deformation of the upper surface 20 of the rubber block 2. Therefore, the mounting member 3 is not easily dropped off from the rubber block 2, and the internal structure of the mounting member 3 is not easily damaged. If the mounting member 3 is embedded and attached to the rubber block 2 so as to be exposed to the upper surface 20 of the rubber block 2, the mounting member 3 may be displaced or removed from its initial mounting position relative to the rubber block 2 due to the elastic deformation of the upper surface 20 of the rubber block 2. Furthermore, there is a risk of a malfunction occurring in the internal structure of the mounting member 3. Since the mounting member 3 is attached to the side of the rubber block 2, the second end 652 of the lever 65 can be easily protruded outside the rubber block 2, and the lever 65 can be easily operated. If the mounting member 3 is attached to the side of the rubber block 2, the mounting member 3 can be easily attached to an existing rubber block 2.

[0037] <Embodiment 1-2> As shown in Figs. 7 to 9, the mounting member 3 in the attachment 1 of embodiment 1-2 includes a magnet 4, a first elastic body 5, a retaining mechanism 7, and a case 9. Fig. 7 shows the mounting member 3 in a first state. Fig. 8 shows the mounting member 3 in a second state. Fig. 9 shows the mounting member 3 in a third state. The mounting member 3 in embodiment 1-2 differs from the mounting member 3 in embodiment 1-1 mainly in the configuration of the retaining mechanism. In the following explanation, the differences from the above-mentioned embodiment 1-1 will be mainly described, and explanations of similar points will be omitted.

[0038] [Holding mechanism] The holding mechanism 7 includes a shaft 71 and a stopper 75. The shaft 71 is the same as the shaft 61 of the embodiment 1-1. A first end 711 of the shaft 71 is a male screw that is threaded. A second end 712 of the shaft 71 has a flange. The stopper 75 includes a cylindrical portion 751, an axis portion 752, and a second elastic body 77.

[0039] The tubular portion 751 is a tubular member extending in a direction intersecting the shaft 71. The tubular portion 751 in this example is a cylindrical member extending in a direction perpendicular to the shaft 71. The tubular portion 751 is a bottomed tubular member having an opening at a first end and a bottom 751b at a second end. The tubular portion 751 is arranged so as to bridge between opposing side portions 92 of a case 9 described later. The first end of the tubular portion 751 is fixed to a hole 92h provided in the side portion 92, and the second end of the tubular portion 751 is fitted into a recess 92c provided in the side portion 92. A hole 751h is provided in each of the opposing peripheral walls of the tubular portion 751. The shaft 71 passes through the hole 751h. The inner diameter of the hole 751h is slightly larger than the outer diameter of the shaft 71. The first elastic body 5 is arranged on the outer periphery of the shaft 71 between the magnet 4 and the tubular portion 751. The first elastic body 5 in this example is abutted against an end face of a support 45 that supports the magnet 4 .

[0040] The shaft portion 752 is a rod-shaped member arranged coaxially inside the cylindrical portion 751. The shaft portion 752 in this example is a round bar-shaped member. The outer diameter of the shaft portion 752 is smaller than the inner diameter of the cylindrical portion 751. The shaft portion 752 includes a shaft body and a flange provided at a first end of the shaft body. The first end of the shaft body is located outside the case 9 through a hole 92h provided in the side portion 92. The flange has an outer diameter larger than the shaft body, is exposed from the cylindrical portion 751, and is located outside the case 9. When the shaft portion 752 is pushed into the cylindrical portion 751, the flange abuts against an opening of the cylindrical portion 751, thereby serving as a stopper that restricts the movement of the shaft portion 752 in the pushing direction. The shaft portion 752 is provided with a hole 752h. The shaft 71 passes through the hole 752h. The inner diameter of the hole 752h is slightly larger than the outer diameter of the shaft 71. In this example, the inner diameter of hole 752h is the same as the inner diameter of hole 751h. A locking portion (not shown) is provided at a second end of shaft portion 752. The locking portion is configured, for example, by a protrusion protruding radially from the circumferential surface of shaft portion 752. The locking portion is provided, for example, at two opposing positions on the circumferential surface of shaft portion 752. The locking portion plays a role in preventing shaft portion 752 from slipping out of tube portion 751 by being stopped by the inner surface of hole 751h.

[0041] When the axis of hole 751h and the axis of hole 752h are aligned, a gap is formed between the side surface of shaft 71 and the inner surfaces of holes 751h and 752h. When the axis of hole 751h and the axis of hole 752h are misaligned, two opposing points on the side surface of shaft 71 are sandwiched between the inner surfaces of holes 751h and 752h. The shaft 71 is held by stopper 75 by this sandwiching.

[0042] The second elastic body 77 is a compression spring. The second elastic body 77 is disposed between the bottom 751b of the cylindrical portion 751 and the end face of the second end of the shaft portion 752. The second elastic body 77 presses the shaft portion 752 against the shaft 71. When the second elastic body 77 presses the shaft portion 752, the axis of the hole 751h and the axis of the hole 752h are misaligned, and as described above, a state is maintained in which two opposing points on the side surface of the shaft 71 are sandwiched between the inner surface of the hole 751h and the inner surface of the hole 752h. The second elastic body 77 is in a compressed state in any of the first state, the second state, and the third state.

[0043] 〔case〕 The case 9 in this example has an upper portion 91 and a side portion 92. The upper portion 91 has a hole 91h through which the support 45 passes. The side portion 92 has a hole 92h through which the shaft portion 752 of the stopper 75 passes. An area of ​​the side portion 92 facing the hole 92h is thickened toward the inside of the case 9. This thickened area has a recess 92c that opens toward the inside of the case 9. A part of the tube portion 751 fits into the recess 92c. The case 9 in this example opens downward. The case 9 may have a bottom that closes the lower opening.

[0044] [How to use the attachment] The procedure for using the attachment 1 is the same as in embodiment 1-1.

[0045] [Effect] In the first state, as shown in FIG. 7, the first elastic body 5 is in the initial state, and the upper surface 40 of the magnet 4 is located at the uppermost position. The second elastic body 77 presses the shaft portion 752 against the shaft 71, and two opposing points on the side of the shaft 71 are sandwiched between the inner surface of the hole 751h and the inner surface of the hole 752h. This sandwiching causes the shaft 71 to be held by the stopper 75 with the upper surface 40 of the magnet 4 located at the uppermost position. In the first state, as shown in FIG. 1, the magnet 4 is held in a state in which the upper surface 40 of the magnet 4 is located above the upper surface 20 of the rubber block 2. Therefore, in the first state, the magnet 4 sticks to the lower surface of the vehicle 10, and the attachment 1 is fixed to the vehicle 10.

[0046] In the second state, as shown in FIG. 2, the rubber block 2 is compressed between the vehicle 10 and the lift 100, and the magnet 4 receives a load from the vehicle 10. In response to this load, the position of the upper surface 40 of the magnet 4 is displaced downward. Specifically, the shaft 71 is lowered by the load, and the position of the upper surface 40 of the magnet 4 is displaced downward. When the upper surface 40 of the magnet 4 is displaced downward, the first elastic body 5 is compressed between the support body 45 and the cylindrical portion 751, as shown in FIG. 8. Even in the second state, the second elastic body 77 presses the shaft portion 752 against the shaft 71, and two opposing points on the side of the shaft 71 are sandwiched between the inner surface of the hole 751h and the inner surface of the hole 752h. Due to this sandwiching, the shaft 71 is held by the stopper 75 even in a state in which the first elastic body 5 is compressed. In the second state, as shown in FIG. 2, the magnet 4 is held in a state in which the upper surface 40 of the magnet 4 is flush with the upper surface 20 of the rubber block 2. In the second state, the magnet 4 remains attached to the underside of the vehicle 10 .

[0047] In the process of changing from the first state to the second state, the shaft 71 moves down while sliding against both the inner surface of the hole 751h and the inner surface of the hole 752h.

[0048] In the third state, as shown in FIG. 3, the rubber block 2 does not receive the load from the vehicle 10 and returns from the compressed state to the uncompressed state. In the third state, as shown in FIG. 8, the shaft 71 remains held by the stopper 75 with the first elastic body 5 in a compressed state. Therefore, in the third state, as shown in FIG. 3, the upper surface 40 of the magnet 4 is located below the upper surface 20 of the rubber block 2. Due to the distance D between the upper surface 40 of the magnet 4 and the upper surface 20 of the rubber block 2, the magnet 4 does not exert a sufficient attraction force to attract the attachment 1 to the lower surface of the vehicle 10. Therefore, in the third state, the magnet 4 comes off from the lower surface of the vehicle 10, and the attachment 1 comes off from the vehicle 10.

[0049] When returning the mounting member 3 from the third state to the first state, as shown in FIG. 9, the first end of the shaft portion 752 of the stopper 75 is pressed against the inside of the tube portion 751. At this time, the second elastic body 77 is further compressed by the shaft portion 752. When the shaft portion 752 is pressed against the inside of the tube portion 751, the axis of the hole 751h and the axis of the hole 752h are aligned, and a gap is formed between the side surface of the shaft 71 and the inner surfaces of the holes 751h and 752h. When the above gap is formed, the first elastic body 5 expands, the shaft 71 moves upward, and the upper surface 40 of the magnet 4 is positioned at the uppermost position. The outline arrow shown in FIG. 9 indicates the movement direction of the shaft 71. When the pressure of the shaft portion 752 against the inside of the tube portion 751 is released, the mounting member 3 returns to the first state.

[0050] 〔effect〕 The mounting member 3 in the embodiment 1-2 also has the same effect as the mounting member 3 in the embodiment 1-1. In the third state, the mounting member 3 in the embodiment 1-2 also prevents the attachment 1 from being forgotten to be removed because the mechanical mechanism of the mounting member 3 always detaches the attachment 1 from the vehicle 10. To change from the second state to the third state, the lift 100 only needs to be lowered, and the worker does not need to perform any operation on the mounting member 3. The mounting member 3 can be returned from the third state to the first state by simply operating the shaft portion 752 of the stopper 75, and the operation is simple. Since the mounting member 3 is attached to the side surface of the rubber block 2, it is easy to protrude the first end of the shaft portion 752 to the outside of the rubber block 2, and it is easy to operate the shaft portion 752.

[0051] <Embodiment 2> The attachment 1 of the second embodiment will be described with reference to FIG. 10. In the attachment 1 of the second embodiment, the positional relationship between the upper surface 20 of the rubber block 2 and the upper surface 40 of the magnet 4 is as follows in each of the first state shown in FIG. 1, the second state shown in FIG. 2, and the third state shown in FIG. 3. In each of the first and third states, the upper surface 40 of the magnet 4 is flush with the upper surface 20 of the rubber block 2, or is located above the upper surface 20 of the rubber block 2. That is, the position of the upper surface 40 of the magnet 4 is the same in the first and third states. In the second state, the upper surface 40 of the magnet 4 is flush with the upper surface 20 of the rubber block 2. The attachment 1 of the second embodiment does not include a holding mechanism corresponding to the holding mechanisms 6 and 7 described in the first embodiment.

[0052] In the attachment 1 of the second embodiment, the magnet 4 is an electromagnet. The electromagnet includes a movable iron core 81, a coil 82, and a power supply unit 83. The movable iron core 81 is disposed in series with the first elastic body 5. The coil 82 is disposed on the outer periphery of the movable iron core 81. The power supply unit 83 supplies power to the coil 82.

[0053] The movable core 81 is a rod-shaped member extending in the vertical direction. A first end of the movable core 81 is located outside the case 9 through a hole 91h provided in the upper part 91 of the case 9. The tip surface of the first end is the upper surface 40 of the magnet 4. The shape of the tip surface of the first end is, for example, a hemispherical shape. The first elastic body 5 is disposed between the end surface of the second end of the movable core 81 and a bottom part 93 of the case 9 described later. The movable core 81 and the first elastic body 5 are disposed in series. The coil 82 is disposed on the outer periphery of the movable core 81. The coil 82 is fixed to the case 9. The power supply unit 83 supplies power to the coil 82 through a lead wire 85. When power is supplied to the coil 82, the movable core 81 generates a magnetic force and functions as a magnet. When power is not supplied to the coil 82, the movable core 81 does not generate a magnetic force and does not function as a magnet. The power supply unit 83 includes a switch 84 that switches between supplying and stopping power to the coil 82. The power supply unit 83 may be provided outside the case 9. The power supply unit 83 may be fixed, for example, to one of the side surfaces of the rubber block 2 to which the mounting member 3 is not attached.

[0054] The case 9 houses the first elastic body 5, most of the movable core 81, the coil 82, and the power supply unit 83. The case 9 in this example has an upper part 91, a side part 92, and a bottom part 93. The upper part 91 is provided with a hole 91h through which the first end part of the movable core 81 passes. A part of the bottom part 93 is thickened toward the inside of the case 9. This thickened part is provided with a recess 93c that opens toward the inside of the case 9. A part of the first elastic body 5 fits into the recess 93c. The bottom part 93 is provided with a hole 93h through which the switch 84 passes.

[0055] [Effect] In the first state, as shown in Fig. 10, the first elastic body 5 is in an initial state in which it is slightly compressed from its natural length by the weight of the movable iron core 81, and the upper surface 40 of the magnet 4 is located at the uppermost position. In this state, when the switch 84 is turned ON to supply power to the coil 82, the movable iron core 81 generates a magnetic force and functions as a magnet. In the first state, as shown in Fig. 1, the magnet 4 is held in a state in which the upper surface 40 of the magnet 4 is located above the upper surface 20 of the rubber block 2. Therefore, in the first state, the magnet 4 sticks to the lower surface of the vehicle 10, and the attachment 1 is fixed to the vehicle 10.

[0056] In the second state, as shown in FIG. 2, the rubber block 2 is compressed between the vehicle 10 and the lift 100, and the magnet 4 receives a load from the vehicle 10. In response to this load, the position of the upper surface 40 of the magnet 4 is displaced downward. Specifically, the movable iron core 81 is lowered by the load, and the position of the upper surface 40 of the magnet 4 is displaced downward. When the upper surface 40 of the magnet 4 is displaced downward, the first elastic body 5 is compressed between the movable iron core 81 and the bottom 93 of the case 9. In the second state, as shown in FIG. 2, the upper surface 40 of the magnet 4 is flush with the upper surface 20 of the rubber block 2. In the second state, since the position of the attachment 1 is fixed, the magnet 4 does not need to be attached to the lower surface of the vehicle 10. Therefore, when the rubber block 2 is compressed and the position of the attachment 1 is fixed, the switch 84 is turned OFF to stop the supply of power to the coil 82. When the supply of power is stopped, the movable iron core 81 loses its magnetic force and no longer functions as a magnet. In other words, the attraction force of the magnet 4 to the vehicle 10 becomes zero.

[0057] In the third state, the rubber block 2 is released from the compressed state and returns to the uncompressed state, as shown in Fig. 3. Since the switch 84 is turned OFF in the second state, the magnet 4 is detached from the underside of the vehicle 10, and the attachment 1 is detached from the vehicle 10. Since the attachment 1 is not subjected to a load from the vehicle 10 in the third state, the movable core 81 moves upward, and the first elastic body 5 returns to the initial state.

[0058] 〔effect〕 In the attachment 1 of embodiment 2, in the first state, the magnet 4 is held in a state in which the upper surface 40 of the magnet 4 is positioned above the upper surface 20 of the rubber block 2, so that the magnet 4 sticks to the underside of the vehicle 10 and is fixed to the vehicle 10. When the attachment is made using the magnet 4, the attachment 1 can be properly attached to the lift-up point of the vehicle 10 in one go. In the second state, the upper surface 40 of the magnet 4 is displaced downward in response to the load of the vehicle 10, so that the vehicle 10 can be properly supported by the upper surface 20 of the rubber block 2. The effect of attaching the mounting member 3 to the side surface of the rubber block 2 is the same as in embodiment 1-1.

[0059] The present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0060] 1 Attachment 2 rubber block, 20 top 3 Mounting parts 4 magnets, 40 top, 45 supports, 46 holes 5 First Elastic Body 6 Retention mechanism 61 shaft, 611 first end, 612 second end 65 Lever 651 first end, 651h hole, 651he inner periphery, 652 second end 655 Fulcrum 67 Second Elastic Body 7 Retention mechanism 71 shaft, 711 first end, 712 second end 75 Stopper 751 Cylinder, 751b bottom, 751h hole, 752 Shaft, 752h hole 77 Second Elastic Body 81 movable core, 82 coil, 83 power supply unit, 84 switch, 85 lead wire 9 Cases 91 top, 91h hole, 91c recess 92 side, 92h hole, 92c recess 93 bottom, 93h hole, 93c recess 10 Vehicles 100 lifts, 110 tables D Distance

Claims

[Claim 1] An attachment disposed between a vehicle and a lift for raising and lowering the vehicle, Rubber block and and a mounting member attached to a side surface of the rubber block. The mounting member is A magnet that is attached to and detached from the underside of the vehicle; a first elastic body that displaces the position of the upper surface of the magnet in the vertical direction in response to a load from the vehicle. attachment.

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