Receiving frame

Abstract

To provide a highly safe receiving frame for supporting a chassis or a body lifted using a jack.SOLUTION: A receiving frame 1 that supports a chassis 530 comprises a first member 11 having a step-like slope and capable of being suspended on the chassis 530, a second member 12 having a step-like slope mating with the step-like slope of the first member 11, and a first connecting member 15 connecting the first member 11 and the second member 12 so as to be separated in the vertical direction, the first connecting member 15 is configured to displace the horizontal relative positions of the first member 11 and the second member 12 in conjunction with the displacement of the first member 11 and the second member 12 to separate horizontally, and the first member 11 and the second member 12 are configured to increase the vertical dimension when the step-like slopes of each member mate with each other as the horizontal relative positions displace.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a support frame that supports a jacked-up vehicle chassis or body. [Background technology]

[0002] Conventionally, overhead cranes and the like that are installed near the ceiling of buildings such as factories to transport various materials have been used as cranes for lifting heavy objects (see, for example, Patent Document 1 below). For example, a rail-type overhead crane is a crane in which both ends of a girder installed to traverse the building are supported by saddles that move back and forth on beams that support the ceiling, for example. The pair of saddles move synchronously along the beams, causing the girder to move in translation, and the workpiece is moved to the lifting or hanging location.

[0003] Some overhead cranes are capable of lifting and transporting heavy loads in the 10-ton range. Wear is inevitable on the tires of the saddle that supports the load of the work being lifted with an overhead crane. Operating an overhead crane requires maintenance such as periodic tire replacement. Similar to changing tires on a regular vehicle, the saddle is jacked up to lift the tire off the beam, allowing the tire to be replaced. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-91552 Summary of the Invention [Problem to be solved by the invention]

[0005] Jacking up a vehicle requires work in an unstable position, with the chassis and frame lifted off the ground, so ensuring safety is important. In particular, changing tires on an overhead crane requires extra care, as it is done at a high altitude.

[0006] The present invention has been made in consideration of the above-mentioned conventional problems, and aims to provide a support stand for supporting a jacked-up chassis or body, which is useful for ensuring the safety of jacking-up work. [Means for solving the problem]

[0007] The present invention is a support frame that is installed under a jacked-up chassis or body and supports the chassis or body, a first member having a stepped slope and capable of being hung from the chassis or the body; a second member having a stepped incline that engages with the stepped incline of the first member; a first connecting member that connects the first member and the second member so as to be separable in the vertical direction; the first connecting member is configured to displace a relative position between the first member and the second member in a horizontal direction from an initial position in conjunction with a relative displacement between the first member and the second member in a vertical direction, The first member and the second member are on a support stand configured such that as their relative horizontal positions are displaced from the initial position, the position at which their step-like inclinations interlock shifts, and the vertical dimension increases when their step-like inclinations interlock. [Effects of the Invention]

[0008] The first member of the support frame of the present invention can be hung from a chassis or a vehicle body. The first member is connected to the second member via a first connecting member so as to be separable in the vertical direction. The first member and the second member both have stepped slopes, and are combined in a state in which the stepped slopes interlock with each other.

[0009] In the support stand of the present invention, the first connecting member is configured so that the horizontal relative position between the first member and the second member is displaced in conjunction with the relative displacement between the first member and the second member in the vertical direction. As the horizontal relative positions of the first member and the second member are displaced, the position where the stepped slopes of the first member and the second member interlock with each other shifts, and the vertical dimension increases.

[0010] If the support frame is set under the chassis or body and the chassis is jacked up with the first member suspended, the vertical dimension of the support frame can be increased in accordance with the vertical displacement of the first member. If the chassis or body is jacked down in this state, the support frame, with its increased vertical dimension, can support the chassis or body with high reliability.

[0011] The support pedestal of the present invention has the excellent characteristic that its vertical dimension increases in conjunction with the lifting of the chassis or body by jacking up, and it can transition to a state where it can support the chassis or body in response to the jacking up. By using this support pedestal in jacking up work, it is possible to increase the safety of the work by setting the support pedestal in advance before lifting the chassis or body. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of an overhead crane according to a first embodiment. [Figure 2] FIG. 3 is a side view of the receiving stand in the first embodiment. [Figure 3] FIG. 3 is a side view of a first connecting member in the first embodiment. [Figure 4] 3A and 3B are diagrams illustrating the combined structure of the receiving stands in the first embodiment. [Figure 5] FIG. 2 is a diagram showing a state when a jack-up operation is started in the first embodiment. [Figure 6] FIG. 10 is a diagram showing the support base at the start of jacking up in the first embodiment. [Figure 7] FIG. 10 is a diagram showing the support base during jacking up in the first embodiment. [Figure 8] FIG. 2 is a diagram showing a support base during jacking up in the first embodiment. [Figure 9] FIG. 2 is a diagram showing a support base that supports a chassis in the first embodiment. [Figure 10] FIG. 2 is a diagram showing a chassis supported by a receiving frame in the first embodiment. [Figure 11] FIG. 10 is a perspective view showing another receiving stand in the first embodiment. [Figure 12] FIG. 10 is a side view of a receiving stand provided with a second connecting member in the second embodiment. [Figure 13] FIG. 10 is a side view of a support frame that supports a chassis in the second embodiment. [Figure 14] FIG. 10 is a view showing the support frame when the chassis is jacked up again after tire replacement in the second embodiment. [Figure 15] FIG. 10 is a view showing the support frame when the chassis is jacked down after tire replacement in the second embodiment. [Figure 16] FIG. 10 is a diagram showing the receiving stand when all work is completed in the second embodiment. [Figure 17] FIG. 10 is a diagram showing a receiving stand provided with a mechanism for storing a second connecting member in the second embodiment. [Figure 18] FIG. 11 is a side view of the receiving stand (in a housed state) in the third embodiment. [Figure 19] FIG. 11 is a side view (extended state) of the receiving stand in the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] The embodiments of the present invention will be specifically described using the following examples. Example 1 This example relates to a support stand 1 that is used for tire replacement work of an overhead crane 5. The details of this example will be described with reference to Figs. First, we will briefly explain the overhead crane 5 (Fig. 1) that utilizes the support frame 1 of this example. The overhead crane 5 of this example is a rail-type overhead crane installed in a building such as a factory. The overhead crane 5 is equipped with a girder 51 that is installed so as to cross the interior of the building. Both ends of the girder 51 are supported by saddles 53 that move on beams 58 that support the ceiling. The pair of left and right saddles 53 move synchronously, allowing the girder 51 to move in a translational manner.

[0014] A trolley 55 for lifting a workpiece (not shown) is held in a movable manner by the girder 51. By combining the translation of the girder 51 due to the movement of the saddle 53 and the advancement and retreat of the trolley 55 along the longitudinal direction of the girder 51, it becomes possible to perform operations such as lifting and lowering the workpiece at various locations within the building.

[0015] The saddle 53 is configured by attaching tires 532 to the front and rear of an elongated chassis 530 that supports the ends of the girder 51. The direction in which the tires 532 roll is along the longitudinal direction of the beam 58 on which the saddle 53 is placed. The saddle 53 moves along the beam 58 by the rolling of the two tires 532 on the front and rear wheels. The pair of saddles 53 that support both ends of the girder 51 have the same specifications.

[0016] The trolley 55 is equipped with a hoist. The hoist is a machine for winding up a wire to which a lifting hook 551 is attached. The trolley 55 is equipped with a drive wheel (not shown) for moving forward and backward along the girder 51.

[0017] The overhead crane 5 requires regular maintenance to ensure perfect functionality. Maintenance includes various tasks such as inspection and repair, as well as the regular replacement of consumable parts. One of the consumable parts is the tire 532 of the saddle 53. Regular replacement of the tire 532 of the saddle 53 can ensure smooth movement of the girder 51. When replacing the tire 532, it is necessary to jack up the saddle 53 and lift it from the beam 58.

[0018] The support frame 1 (Fig. 2) of this example is a frame for supporting a chassis 530 (saddle 53) lifted by jacking up. The support frame 1 is interposed between the chassis 530 and a beam 58 on which a tire 532 rolls. The support frame 1 of this example is composed of a combination of a first member 11 and a second member 12. The first member 11 and the second member 12 are connected by first connecting members 15 attached to both side surfaces. The first connecting member 15 (Fig. 3) is a long, thin, flat member. A round hole 151 is drilled at one end of the first connecting member 15, and an elongated hole 155 is drilled at the other end.

[0019] As shown in Fig. 4, the first member 11 and the second member 12 are members whose side shapes are generally trapezoidal and facing sideways. The first member 11 has a slope 11S corresponding to the slope of the generally trapezoid facing downward, and the second member 12 has a slope 12S corresponding to the slope of the generally trapezoid facing upward. The first member 11 and the second member 12 can be combined with each other with their slopes 11S and 12S facing each other so that the side shapes are rectangular.

[0020] The slope 11S of the first member 11 and the slope 12S of the second member 12 are formed in a step-like shape as shown in Fig. 4. When the first member 11 and the second member 12 are combined, the step-like slopes 11S and 12S of each member are in a state of meshing with each other.

[0021] Each step constituting the stepped slope 11S (12S) of the first member 11 (second member 12) has an inclined surface 113 (123) and a flat surface 111 (121). The inclined surface 113 (123) is an inclined surface that slopes in a direction different from that of the stepped slope 11S (12S). The flat surface 111 (121) is a horizontal flat surface that is provided adjacent to the downward side of the inclined surface 113 (123). A gap is formed between adjacent steps of the stepped slope 11S (12S) by a vertical surface 112 (122).

[0022] A connecting pin 118 is erected on the side surface of the first member 11. The connecting pin 118 of the first member 11 is a shaft that passes through the round hole 151 of the first connecting member 15. A screw thread is formed on the outer circumferential surface of the connecting pin 118, onto which a fixing nut 181 (see FIG. 2) can be screwed. A similar connecting pin 118 is erected on the opposite side surface of the first member 11.

[0023] A screw hole 128 is drilled in the side surface of the second member 12. This screw hole 128 is a screw hole for threading in a fixing bolt 185 (see FIG. 2) that is disposed to pass through the elongated hole 155 of the first connecting member 15. A similar screw hole 128 is drilled in the opposite side surface of the second member 12.

[0024] By tightening the fixing nut 181 threaded onto the connecting pin 118 and the fixing bolt 185 threaded into the screw hole 128, the first connecting member 15 can be fixed, thereby fixing the interlocking state between the first member 11 and the second member 12. When starting use, the receiving stand 1 is in a state in which the interlocking state between the first member 11 and the second member is fixed so that the side surfaces have a square shape (see FIG. 2).

[0025] The relative horizontal position of the first member 11 and the second member 12 when the side surface of the receiving frame 1 is rectangular is the initial position (FIG. 2), and at this time, the height (vertical) dimension of the receiving frame 1 is at its minimum. The height dimension of the receiving frame 1 in this initial state is smaller than the gap between the chassis 530 and the beam 58. Furthermore, when the height dimension of the receiving frame 1 is at its minimum, the inclination of the first connecting member 15 connecting the first member 11 and the second member 12 from the vertical direction is at its maximum.

[0026] A magnet device 119 is attached to the upper surface of the first member 11 (FIG. 4). The magnet device 119 is a device for fixing the first member 11 to the bottom surface of the chassis 530 (saddle 53, see FIG. 5). The first member 11 can be attracted to the chassis 530 by the magnetic force of the magnet device 119, and can thereby be suspended from the chassis 530. The magnet device 119 is provided with a selector switch (not shown), and by operating the selector switch, it is possible to switch between a state in which a magnetic force is generated and a state in which a magnetic force is not generated.

[0027] An example of the magnet device 119 is a device including a yoke and a permanent magnet. In the magnet device 119, by switching the path of the magnetic flux between the north pole and south pole of the permanent magnet, it is possible to switch between a state in which a magnetic force acts on the outside and a state in which a magnetic force does not act on the outside. Alternatively, a device including an electromagnet that generates a magnetic force in response to the passage of current can also be used as the magnet device 119.

[0028] Next, a method for using the support frame 1 configured as described above will be described. As described above, the support frame 1 can be used, for example, to replace the tire 532 of the saddle 53. In order to replace the tire 532, it is necessary to jack up and lift the chassis 530, thereby lifting the tire 532 off the beam 58 that forms the ground contact surface. The support frame 1 can support the chassis 530 thus lifted with a high degree of safety.

[0029] To jack up, the hydraulic jack 3 is placed on the jacking point, and the support frame 1 is set on a location on the underside of the chassis 530 that has sufficient strength (FIG. 5). At this time, it is recommended to set the wheel chock 31 on the tire 532 on the opposite side. As described above, at the start of use, the engagement between the first member 11 and the second member 12 of the support frame 1 is fixed by tightening the fixing nuts 181 and the fixing bolts 185, and the height dimension of the support frame 1 is smaller than the gap between the chassis 530 and the beam 58. In this state, the support frame 1 can be inserted from the side of the chassis 530 and easily set under the chassis 530.

[0030] Once the support frame 1 is set under the chassis 530, the fastening nuts 181 and fastening bolts 185 that secure the first connecting member 15 are slightly loosened. This allows the first connecting member 15 to rotate relative to the first member 11 and the second member 12. This causes the first member 11 to transition from a state in which it engages with the second member 12 due to its own weight and fixation by the first connecting member 15 to a state in which it engages with the second member 12 due to its own weight alone.

[0031] After operating the changeover switch (not shown) so that a magnetic force is generated from the magnet device 119 (first member 11), an operator uses his or her hand or a tool to lift the first member 11 and bring it closer to the chassis 530. As a result, the first member 11 is attracted to the chassis 530 by the magnetic force of the magnet device 119. While the amount of lifting of the first member 11 is small, the vertical surfaces 112, 122 forming the gaps between the stepped slopes 11S, 12S remain in contact (FIG. 6). In this state, the horizontal position of the second member 12 relative to the first member 11 is restricted, and the horizontal relative positions of the first member 11 and the second member 12 do not shift from the initial positions. Note that the fixing nuts 181 and the fixing bolts 185 are not shown in FIGS. 6 to 9.

[0032] In this way, when the first member 11 is pulled up and displaced in the vertical direction without changing the relative positions of the first member 11 and the second member 12 in the horizontal direction, the inclination of the first connecting member 15 changes. Furthermore, the fixing bolt 185 disposed through the elongated hole 155 of the first connecting member 15 is displaced in the longitudinal direction inside the elongated hole 155. Due to this change in the inclination of the first connecting member 15 and the displacement of the fixing bolt 185 inside the elongated hole 155, the upward displacement of the first member 11 is permitted without changing the relative positions of the first member 11 and the second member 12 in the horizontal direction.

[0033] As shown in FIG. 6, after the support frame 1 is set under the chassis 530, the hydraulic jack 3 is used to jack up the chassis 530, widening the gap between the chassis 530 and the beam 58. This causes the vertical surface 112 of the first member 11 and the vertical surface 122 of the second member 12 to shift vertically. This releases the restriction on the horizontal relative positions of the first member 11 and the second member 12 to their initial positions, allowing their horizontal relative positions to shift (FIG. 7). At this time, the first member 11 is fixed to the chassis 530. Therefore, the shift in the horizontal relative positions of the first member 11 and the second member 12 means that the second member 12 slides on the beam 58 and shifts horizontally.

[0034] In the configuration of this example, when the restriction on the relative positions of the first member 11 and the second member 12 in the horizontal direction is released, the fixing bolt 185 disposed through the elongated hole 155 of the first connecting member 15 is configured to be positioned at the end of the elongated hole 155 (FIG. 7). After the fixing bolt 185 reaches the end of the elongated hole 155 in this way, when the first member 11 and the second member 12 move further apart in the vertical direction, the first connecting member 15 needs to be displaced to rotate so that the longitudinal direction of the first connecting member 15 approaches the vertical direction.

[0035] When the chassis 530 is further jacked up and raised, the first member 11 and the second member 12 move further apart in the vertical direction while the first connecting member 15 is rotated and displaced. The rotational displacement of the first connecting member 15 is accompanied by a displacement of the horizontal relative position between the first member 11 and the second member 12, i.e., a horizontal displacement of the second member 12, as shown in Figures 7 and 8. Figure 7 shows a state in which the horizontal relative position between the first member 11 and the second member 12 has just begun to displace, and Figure 8 shows a state in which the chassis 530 has been further raised and the displacement of the horizontal relative position has become larger.

[0036] It is not possible to ensure sufficient safety when changing a tire while the chassis 530 is raised by the hydraulic jack 3 (see FIG. 5). Therefore, it is necessary to fully raise the chassis 530 with the hydraulic jack 3, and then jack it down so that the chassis 530 is supported on the support frame 1. When the chassis 530 is jacked down from the state shown in FIG. 8, the stepped slope 11S of the first member 11 and the stepped slope 12S of the second member 12 are again brought into engagement with each other, as shown in FIG. 9.

[0037] Comparing the receiving cradle 1 in the initial state of FIG. 2 with the receiving cradle 1 in FIG. 9, the positions at which the stepped inclinations 11S of the first member 11 and the stepped inclinations 12S of the second member 12 engage are different. In the state of FIG. 9, the second member 12 is displaced horizontally relative to the first member 11, changing the engagement position, and the height dimension of the receiving cradle 1 increases when the stepped inclinations 11S and 12S engage. In this state, as shown in FIG. 10, the receiving cradle 1 can reliably support the chassis 530, with the tire 532 lifted up, as if floating. With the chassis 530 supported by the receiving cradle 1, the tire 532 can be replaced safely.

[0038] After the replacement of the tire 532 is completed, it is necessary to remove the support base 1 from under the chassis 530. In order to remove the support base 1, it is advisable to first operate the above-mentioned changeover switch (not shown) so that no magnetic force is generated from the magnet device 119 (first member 11). Then, it is advisable to jack up the chassis 530 again and reduce the load acting on the support base 1 to zero.

[0039] In this state, the worker can return the engagement position with the second member 12 to its original position (see FIG. 2) while lifting the first member 11 by hand or with a tool, thereby minimizing the height dimension of the support frame 1. By tightening the fixing nuts 181 and fixing bolts 185 that secure the first connecting member 15, the engagement state between the first member 11 and the second member 12 can be fixed, and the support frame 1 can be safely removed from under the chassis 530. Thereafter, the chassis 530 can be jacked down to complete the tire 532 replacement work.

[0040] As described above, after the support cradle 1 of this example is set under the chassis 530, its height dimension can be increased in conjunction with the lifting of the chassis 530 by jacking up. When the support cradle 1 is jacked down again, it can reliably support the lifted chassis 530. The support cradle 1 of this example expands in height according to the amount of lifting of the chassis 530 by jacking up. Therefore, there is no need to separately adjust the height of the support cradle 1 according to the gap below the jacked-up chassis 530, and tire 532 replacement work can be performed efficiently. Even if hydraulic pressure loss occurs during jacking up with the hydraulic jack 3, the support cradle 1 of this example expands in height to a height corresponding to the amount of lifting of the chassis 530 at that time. Therefore, it is possible to minimize the descent of the chassis 530 due to hydraulic pressure loss.

[0041] In the configuration of this example, each step of the stepped slope 11S of the first member 11 is provided with an inclined surface 113 that slopes in a different direction from the slope 11S. Each step of the stepped slope 12S of the second member 12 is also provided with an inclined surface 123 that slopes in a different direction from the slope 12S. When the first member 11 and the second member 12 are engaged with each other, the inclined surface 113 and the inclined surface 123 abut against each other. When a vertical load acting on the receiving frame 1 acts on the inclined surface 123 from the inclined surface 113, a horizontal load is generated by the inclined surface 123. This horizontal load acts to displace the second member horizontally so that the engagement between the stepped slope 11S of the first member 11 and the stepped slope 12S of the second member becomes deeper.

[0042] For example, if the first member 11 is displaced downward from the state shown in FIG. 8, a horizontal load is generated in response to the contact between the inclined surface 113 and the inclined surface 123, causing the second member 12 to displace to the right in the figure. Then, the interlocking state illustrated in FIG. 9 is realized, in which the stepped inclination 11S of the first member 11 and the inclination 12S of the second member 12 interlock deeply and reliably. When the load acting from the first member 11 to the second member 12 acts on the contact point between the inclined surface 113 and the inclined surface 123, a force is generated that presses the two members together horizontally. This pressing force effectively serves to maintain the interlocking state between the first member 11 and the second member 12 with high reliability.

[0043] Furthermore, in the configuration of this example, a horizontal flat surface 111 is provided at each step of the stepped slope 11S of the first member 11 at a location that slopes downward from the slope 113, and a similar horizontal flat surface 121 is provided on the side of the second member 12. When the flat surfaces 111 and 121 are provided, when the slope 112 and the slope 123 come into contact with each other, dust and foreign matter adhering to the slope 113 and the slope 123 gathers in the area where the flat surface 111 and the flat surface 121 face each other. The dust and foreign matter that gathers in the area where the flat surface 111 and the flat surface 121 face each other can be crushed with high reliability by the vertical load acting from the first member 11 to the second member 12. On the other hand, in the case of a support frame that does not have flat surfaces 111, 121 and in which each step of the stepped slope is formed only by an inclined surface, there is a high possibility that dust and foreign matter will concentrate in one location at the bottom of the slope on each step of the stepped slope. If the dust and foreign matter concentrated in one location were to break down while chassis 530 is supported by the support frame, there is a risk that the support height of chassis 530 would suddenly decrease. If dust and foreign matter are collected at the location where flat surfaces 111 and 121 face each other as described above and crushed by a vertical load, it is possible to prevent the support height of chassis 530 supported by the support frame from suddenly decreasing, thereby ensuring high safety.

[0044] However, the flat surfaces 111 and 121 are not essential components. Each step of the slope 11S of the first member 11 may be formed solely by the inclined surface 113. In this case, each step of the slope 12S of the second member 12 may also be formed solely by the inclined surface 123. Alternatively, each step of the slope 12S of the second member 12 may be formed solely by the inclined surface 123, while providing a flat surface 111 for each step of the slope 11S of the first member 11. In this case, when the first member 11 and the second member 12 are engaged with each other, a gap can be provided between the flat surface 111 of the first member 11 and the inclined surface of the second member 12. This gap can serve as an escape route for foreign matter between the first member 11 and the second member 12. Therefore, providing such a gap can suppress the influence of foreign matter on the engagement between the first member 11 and the second member 12.

[0045] The inclined surfaces 113, 123 are not essential components either. It is also possible to form each step of the stepped inclinations 11S, 12S of the first member 11 and the second member 12 using only horizontal flat surfaces. When each step of the stepped inclinations 11S, 12S is formed using only horizontal flat surfaces, it is preferable to provide a separate mechanism for fixing the engagement state between the first member 11 and the second member 12.

[0046] The first connecting member 15 employed in this example is a thin, flat member having a round hole 151 or a long hole 155 drilled at its end. Instead of the round hole 151 and the long hole 155, a single long hole extending nearly the entire length of the first connecting member 15 may be used. The receiving stand 1 of this example includes two first connecting members 15, which are attached to both side surfaces. Alternatively, as shown in FIG. 11 , the first connecting member 15 may be provided inside the receiving stand 1. In the receiving stand 1 of this figure, the first connecting member 15 is disposed in a hollow portion 100 that penetrates vertically. Pin holes 11P and 12P that reach the hollow portion 100 are provided in the side surfaces of the first member 11 and the second member 12. The first connecting member 15 is supported by pins inserted into the pin holes 11P and 12P.

[0047] In this example, a support frame 1 for supporting a saddle 53 (an example of a chassis 530) of an overhead crane 5 is shown. A support frame configured in a similar manner can be used to support the skeleton of a building, bridge, etc. If a support frame configured in a similar manner to this example is installed under a jacked-up skeleton, various tasks can be performed with the skeleton raised from its original position.

[0048] Example 2 This example is an example of a receiving stand 1 based on the receiving stand of the first embodiment, which is configured so as to be able to quickly return to the initial state after the completion of the replacement work of the tire 532. The details thereof will be described with reference to Figs. 12 to 17.

[0049] The receiving stand 1 of this example (FIG. 12) is based on the receiving stand of Example 1, but with the addition of a second connecting member 16 and a spacer 120 for raising the height attached to the bottom surface of the second member 12. The second connecting member 16 is a metal wire with appropriate flexibility. The second connecting member 16 is attached to two of the side surfaces of the receiving stand 1, excluding the attachment surface of the first connecting member 15. Screw holes (not shown) for inserting bolts 164 are drilled in the side surfaces of the first member 11 and the second member 12 that constitute these two side surfaces.

[0050] Plates 161 having holes formed therein for passing bolts 164 are attached to both ends of the wire forming the second connecting member 16. The second connecting member 16 in the receiving frame 1 is attached by fixing the plates 161 to the first member 11 and the second member 12 with the bolts 164. In the state at the start of use illustrated in FIG. 12, the wire of the second connecting member 16 is in a slack state. The receiving frame 1 of this example can be used in the same way as in Example 1, and can support a jacked-up chassis 530 (saddle 53) in the same way as in FIG. 10 referred to in Example 1.

[0051] The receiving stand 1 of this example is characterized by the procedure for removing it from under the chassis 530 after replacing the tire 532. This procedure begins with removing the fixing bolt 185, which is disposed through the elongated hole 155 of the first connecting member 15, from the threaded hole 128, to free the end of the first connecting member 15 as shown in FIG.

[0052] When the chassis 530 is jacked up, as shown in FIG. 14, the second member 12 is suspended via the second connecting member 16 as the first member 11 rises. The second connecting member 16 is made of a wire with appropriate flexibility. The second member 12 is displaced horizontally by the action of gravity to a position directly below the first member 11. Here, the position where the second member 12 is directly below the first member 11 is the position where the relative horizontal positions of the first member 11 and the second member 12 are the initial positions.

[0053] When the chassis 530 is jacked down with the horizontal relative positions of the first member 11 and the second member 12 at their initial positions (FIG. 14), the stepped slope 11S of the first member 11 and the stepped slope 12S of the second member 12 can be engaged with each other as shown in FIG. 15. At this time, the first member 11 is attached to the chassis 530 by suction, while the second member 12 is placed on the beam 58. Therefore, the first member 11 and the second member 12 cannot approach each other sufficiently in the vertical direction, resulting in a loose engagement as shown in FIG. 15.

[0054] Thereafter, by switching the magnet device 119 so that it does not apply magnetic force, the first member 11 can be removed from the chassis 530, and the first member 11 and the second member 12 can be brought into a state of being engaged with each other as shown in Fig. 16. The spacer 120 attached to the bottom surface of the second member 12 makes it possible to avoid interference of the first connecting member 15 with the beam 58 when the first member 11 and the second member 12 are engaged with each other as shown in the same figure.

[0055] 16, if the free end of first connecting member 15 (the end on the second member 12 side) is fixed with fixing bolt 185 and the other end is fixed with nut 181, the interlocking state between first member 11 and second member 12 can be fixed. If the interlocking state between first member 11 and second member 12 is fixed, it is possible to remove receiving frame 1 from under chassis 530 with high safety.

[0056] Instead of the spacer 120, a structure for storing the first connecting member 15 may be provided. For example, as shown in FIG. 17, a pin hole 117 may be provided on the side surface of the first member 11. The pin hole 117 may be provided at a location that communicates with the elongated hole 155 when the first connecting member 15 is rotated. The first connecting member 15 can be stored by inserting a pin (not shown) into the pin hole 117 that communicates with the elongated hole 155. In this case, it is not necessary to raise the bottom surface of the second member 12, and the spacer 120 can be omitted. The other configurations and effects are the same as those of the first embodiment.

[0057] Example 3 This example is a configuration example in which the supporting load is increased based on the support stand of Example 1. This will be described with reference to Figs. The receiving stand 1 (FIG. 18) of this example is a receiving stand in which a combination of a first member 11 and a second member 12 is arranged facing each other with an intermediate member 11C interposed therebetween. In this receiving stand 1, the facing first members 11 are held together by the intermediate member 11C. When the receiving stand 1 extends in the height direction, the facing second members 12 are displaced horizontally so as to approach each other. As shown in FIG. 19, the second members 12 enter the space created below the intermediate member 11C as the receiving stand 1 extends in the height direction, and approach each other so as to reduce the gap between the facing second members 12. Note that the first connecting member 15 and its assembly structure are similar to those of Example 1, although structural details are omitted in FIG. 18.

[0058] The second member 12 of this example has a stepped slope 12S, similar to the second member of Example 1. The number of steps of the stepped slope 12S of the second member 12 is different from the slope 11S of the first member 11. The number of steps of the stepped slope 11S of the first member 11 is five, while the number of steps of the stepped slope 12S of the second member 12 is three. In the support frame 1 of this example, the minimum height dimension is reduced by reducing the number of steps of the stepped slope 12S of the second member 12. This support frame 1 is compatible with a low-floor chassis 530. The support frame 1 of this example employs a left-right symmetrical structure. A left-right symmetrical structure is effective for improving stability. The other configurations and effects are the same as those of the first embodiment.

[0059] Although specific examples of the present invention have been described in detail as examples, these examples merely disclose examples of the technology encompassed by the claims. Needless to say, the scope of the claims should not be interpreted as being limited by the configurations, numerical values, etc. of the specific examples. The claims encompass technologies that are obtained by variously modifying, changing, or appropriately combining the specific examples using publicly known technology and the knowledge of those skilled in the art. [Explanation of symbols]

[0060] 1 Receiving stand 11 First member 111 Flat surface 112 Vertical plane 113 Slope 118 Connecting pin 119 Magnet Device 11S (stepped) slope 181 Fixing nut 185 Fixing bolt 12 Second member 121 Flat surface 122 Vertical plane 123 Slope 128 screw holes 12S (stepped) slope 15 First connecting member 155 long hole 16 Second connecting member 3 Hydraulic jack 5. Overhead crane 51 Guarda 53 Saddle 532 Tires 55 Trolley 58 Beam

Claims

1. A support frame that is installed under a jacked-up chassis or body and supports the chassis or body, a first member having a stepped slope and capable of being hung from the chassis or the body; a second member having a stepped incline that meshes with the stepped incline of the first member; a first connecting member that connects the first member and the second member so as to be separable in the vertical direction; the first connecting member is configured to displace a relative position between the first member and the second member in a horizontal direction from an initial position in conjunction with a relative displacement between the first member and the second member in a vertical direction, The first member and the second member are configured such that as their relative horizontal positions are displaced from the initial position, the position at which their stepped inclinations interlock shifts, and the vertical dimension increases when their stepped inclinations interlock.

2. 2. The support stand according to claim 1, wherein each step constituting the stepped slope of the first member and the second member is provided with an inclined surface that slopes in a direction different from that of the stepped slope.

3. 3. A support stand according to claim 2, wherein each step constituting the stepped slope of the first member and the second member is provided with the inclined surface and a horizontal flat surface is provided adjacent to the downwardly facing side of the inclined surface.

4. According to any one of claims 1 to 3, a magnet device is provided which can switch between a state in which a magnetic force is generated and a state in which a magnetic force is not generated, The first member is a support base that can be suspended from the chassis or the vehicle body by the magnetic force of the magnet device.

5. According to any one of claims 1 to 3, there is provided a second connecting member that connects the second member and the first member so that the second member can be hung, The second connecting member is configured to return the horizontal relative position of the first member and the second member to the initial position when the second member is suspended by the first member with the connection by the first connecting member released.

6. A support frame for supporting an overhead crane as the chassis according to any one of claims 1 to 3.

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