jack base

Abstract

To provide a jack base that improves the efficiency of grounding work for outriggers provided on a road-rail vehicle. [Solution] A jack base 1 is provided on a rail-mounted vehicle that can travel on roads and tracks by switching the running mechanism, and is used to ground an outrigger V1 having a leg V11 that extends and retracts along the vertical direction Z and a leg end V12 provided at the lower end of the leg V11. The jack base 1 comprises a main body 2 formed of a rigid material, and a grounding part 3 formed of an elastic material and connected to the lower end of the main body 2. The main body 2 has a storage space 24 that can accommodate the leg end V12, a storage opening 241 that communicates with the storage space 24 and is formed in a size that allows the leg end V12 to be inserted, and an opening / closing part 4 that blocks at least a part of the storage opening 241.

Description

[Technical Field]

[0001] This invention relates to a jack base. [Background technology]

[0002] In the railway industry, road-rail vehicles equipped with work equipment (such as hoists and aerial work equipment) are often used for inspecting and updating various facilities installed on tracks. Road-rail vehicles are equipped with a road surface running mechanism (such as tires) and a track running mechanism (such as iron wheels) on the vehicle body, and are configured to be able to run on both the road surface and the track by switching the running mechanism. When using the work equipment on a road-rail vehicle, it is necessary to place the outriggers, which are devices to prevent the road-rail vehicle from tipping over, on supports (jack bases) placed on the ground to prevent the vehicle body from tilting.

[0003] For example, as disclosed in Patent Document 1, an outrigger installation support is known in which the outrigger is inserted into an insertion opening in the gap between the floor plate and the ground plate and the insertion opening is blocked with a stopper member, thereby positioning the outrigger at the center of the floor plate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-168148 Summary of the Invention [Problem to be solved by the invention]

[0005] However, because the supports of conventional outriggers are arranged separately from the outriggers, it is necessary to replace the supports every time the car body is moved. Therefore, the conventional outrigger supports have the problem that the workload for replacing the supports increases during work on tracks that involves frequent car body movements, impairing work efficiency.

[0006] The present invention was made in consideration of the above circumstances, and aims to provide a jack base that improves the efficiency of the grounding work of outriggers installed on rail-road vehicles. [Means for solving the problem]

[0007] To achieve the above objectives, the present invention provides the following means: A jack base used for grounding an outrigger, which is attached to a road vehicle that can run on roads and tracks by switching the running mechanism, and has legs that extend and retract in the vertical direction and leg ends attached to the lower ends of the legs, comprises a main body formed of a rigid material and a grounding part formed of an elastic material and connected to the lower end of the main body, and the main body has a storage space capable of accommodating the leg ends, a storage opening that communicates with the storage space and is formed in a size that allows the leg ends to be inserted, and an opening / closing part that blocks at least a portion of the storage opening. [Effects of the Invention]

[0008] According to the present invention, a jack base can be provided that improves the efficiency of grounding work for outriggers installed on rail-road vehicles. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view showing a state in which the jack base according to the embodiment of the present invention is grounded on the railroad track; FIG. [Figure 2] 1 is a perspective view showing a jack base with an opening opened according to an embodiment of the present invention; FIG. [Figure 3] 1 is a perspective view showing a jack base in a state where the receiving opening is closed according to an embodiment of the present invention; [Figure 4] 1 is a plan view showing a jack base according to an embodiment of the present invention as viewed from above; [Figure 5] 1 is a side cross-sectional view showing a jack base according to an embodiment of the present invention. [Figure 6] 1 is a plan view of a jack base according to an embodiment of the present invention, viewed from below. DETAILED DESCRIPTION OF THE INVENTION

[0010] A jack base 1 according to an embodiment of the present invention will be described with reference to Figures 1 to 6. In this embodiment, the drawings are schematic diagrams for easily explaining the configuration, and the components and dimensional ratios may differ from the actual ones. The drawings indicate the X-axis, Y-axis, and Z-axis as appropriate.

[0011] The direction along the Z axis is the direction of gravity and is defined as the "vertical direction Z." In the vertical direction Z, the vertically upward direction is the upper side Z1, and the opposite side is the lower side Z2. In addition, the state viewed from the vertical direction Z is defined as the "planar view."

[0012] The direction along the Y axis is a direction perpendicular to the up-down direction Z, and is the direction in which the outrigger V1 is inserted into the jack base 1, and is defined as the "front-to-back direction Y." In the front-to-back direction Y, the side on which the storage opening 241 is formed is the front side Y1, and the opposite side is the rear side Y2. In addition, the state viewed from the front-to-back direction Y is defined as the "front view."

[0013] The direction along the X axis is perpendicular to the up-down direction Z and the front-back direction Y, and is the direction in which the opening / closing part 4 of the jack base 1 operates, and is defined as the "left-right direction X." In the left-right direction X, the right side as viewed from the front side Y1 is the right side X1, and the opposite side is the left side X2. In addition, the state viewed from the left-right direction X is defined as a "side view."

[0014] As shown in Fig. 1, the jack base 1 is a support used to ground an outrigger V1 of a road-rail vehicle V located on a track L1 of a railway L. Fig. 1 is a perspective view showing a state in which the jack base 1 is grounded on the railway L.

[0015] The track L is a railway passageway having a track L1. The area outside the track L1 of the track L, i.e., the contact surface of the outrigger V1, is formed to be inclined with respect to the horizontal plane to drain rainwater and the like. Crushed stone L3 is laid on the track L to attenuate noise and vibration and improve drainage.

[0016] The road-rail vehicle V is equipped with a road surface traveling mechanism (not shown) and a track traveling mechanism V2 on the vehicle body, and is configured to be able to travel on a road surface (not shown) and a track L1 by switching the traveling mechanism. In FIG. 1, the road-rail vehicle V is positioned on the track L1 of the railway line L using the track traveling mechanism V2. The road-rail vehicle V is equipped with working equipment (not shown), such as a hoist or aerial work equipment. The road-rail vehicle V also has outriggers V1 that prevent the vehicle body from tipping over when the working equipment is in use.

[0017] The outrigger V1 is a device that protrudes outward from the body of the road-rail vehicle V and prevents the road-rail vehicle V from tipping over by coming into contact with the ground. The outrigger V1 has multiple arms (not shown) that extend and retract horizontally. Legs V11 that extend and retract in the vertical direction Z are provided on the underside Z2 of the ends of the multiple arms of the outrigger V1 that face away from the body. A leg end V12 that is larger than the leg V11 in a plan view is formed at the end of the underside Z2 of the leg V11. A jack base 1 is detachably connected to the leg end V12.

[0018] 2 to 6, the jack base 1 has an openable and closable storage opening 241. The jack base 1 is detachably connected to the leg end portion V12 of the outrigger V1 by closing the storage opening 241 while the leg end portion V12 is stored in the internal storage space 24. FIG. 2 is a perspective view showing the jack base 1a in a state where the storage opening 241 is open. FIG. 3 is a perspective view showing the jack base 1b in a state where the storage opening 241 is closed. FIG. 4 is a plan view showing the jack base 1 as viewed from the upper side Z1. FIG. 4(a) is a plan view of the jack base 1a in a state where the storage opening 241 is open, and FIG. 4(b) is a plan view of the jack base 1b in a state where the storage opening 241 is closed. FIG. 5 is a side cross-sectional view showing the jack base 1. FIG. 6 is a plan view of the jack base 1 as viewed from the lower side Z2. The jack base 1 includes a main body 2, a ground contact part 3, and an opening / closing part 4.

[0019] As shown in Figures 2 to 4, the main body 2 is a structural member of the jack base 1 that bears the load generated on the jack base 1 and supports the outrigger V1. The main body 2 is, for example, a steel member, and has high rigidity that allows it to bear the load received from the outrigger V1 (part of the weight of the road-rail vehicle V). The outer shape of the main body 2 is formed in a circular shape that is slightly larger than the leg end portion V12 in a plan view. The main body 2 includes a main body upper surface 21, a main body side surface 22, a main body middle surface 23, an accommodating space 24, a main body lower surface 25, and a pressure-resistant frame 26.

[0020] The main body top surface 21 is a plate-like member provided on the upper side Z1 of the main body portion 2. The main body top surface 21 is formed in a flat shape that faces the up-down direction Z. The periphery of the main body top surface 21 is formed in a substantially circular shape in a plan view. An engaging fitting R is disposed on the right side X1 of the main body top surface 21 so as to be engageable with an engaging protrusion P, which will be described later. A first insertion hole H1 (see FIG. 5) is formed on the left side X2 of the main body top surface 21. A pivot shaft 44, which will be described later, is inserted through the first insertion hole H1 and is pivotally connected to the opening-closing unit 4. A fitting hole 242 (see FIG. 4(b)) shaped to fit with the side of the leg end portion V12 is provided in the center of the main body top surface 21. The main body top surface 21 is formed in a shape that allows the fitting hole 242 to communicate with a storage opening 241, which will be described later, i.e., a shape that is concave toward the front side Y1, in a plan view.

[0021] The main body side surface 22 is a plate-like member provided on a side portion of the main body portion 2. The main body side surface 22 is formed in a substantially cylindrical shape extending in the vertical direction Z. An end portion on the upper side Z1 of the main body side surface 22 is formed integrally with the periphery of the main body upper surface 21. A middle portion of the main body side surface 22 in the vertical direction Z is formed integrally with the periphery of the main body middle surface 23 and the periphery of the main body lower surface 25. An end portion on the lower side Z2 of the main body side surface 22 extends downward Z2 beyond the main body lower surface 25. A substantially rectangular storage opening 241 in front view is formed in the main body side surface 22, between the main body upper surface 21 and the main body middle surface 23 and at a position on the front side Y1. The storage opening 241 is formed larger than the leg end portion V12 in front view and is configured to allow the leg end portion V12 to pass through.

[0022] The main body intermediate surface 23 is a plate-like member provided in the middle of the main body 2 in the vertical direction Z. The main body intermediate surface 23 is formed in a flat plane that faces the vertical direction Z. The main body intermediate surface 23 is formed in a circular shape in a plan view, and the periphery is formed integrally with the main body side surface 22.

[0023] The storage space 24 is a space surrounded by the main body upper surface 21, the main body side surface 22, and the main body middle surface 23, and is formed large enough to accommodate the leg end portion V12. An accommodation opening 241 is provided on the front side Y1 of the storage space 24. A fitting hole 242 is provided on the upper side Z1 of the center of the storage space 24.

[0024] The main body lower surface 25 is a plate-like member provided on the lower side Z2 of the main body portion 2. The main body lower surface 25 is formed in a flat shape facing the vertical direction Z. The main body lower surface 25 is formed in a circular shape in a plan view, and the periphery is formed integrally with the main body side surface 22. A plurality of nuts J2 are fixed to the lower side Z2 of the main body lower surface 25 by, for example, welding. In this embodiment, the plurality of nuts J2 are arranged in a group of four along the circumferential direction with the vertical direction Z as the rotation axis. A plurality of second insertion holes H2 communicating with the screw holes (not shown) of the nuts J2 are formed in the main body lower surface 25.

[0025] The pressure-resistant frames 26 are plate-like members arranged in plurality (three in this embodiment) to connect the main body intermediate surface 23 and the main body lower surface 25. The pressure-resistant frames 26 are formed in flat surfaces facing each other in the left-right direction X. An end portion on an upper side Z1 of the pressure-resistant frames 26 is formed integrally with the main body intermediate surface 23. An end portion on a lower side Z2 of the pressure-resistant frames 26 is formed integrally with the main body lower surface 25.

[0026] The shape, material and configuration of the main body 2 are not limited as long as it can be connected to the leg end portion V12 and bear the load generated on the jack base 1. The main body 2 is constructed from plate-like members to achieve a lightweight structure so that the leg V11 can extend and retract while connected to the leg end V12, but it may have a different configuration. For example, the main body 2 may be constructed from block-like members.

[0027] Furthermore, the main body 2 is formed in a circular shape slightly larger than the leg end portion V12 in plan view so that the outrigger V1 can be completely retracted when connected to the leg end portion V12, but a different configuration is also possible. For example, the main body 2 may be formed in a rectangular plate shape in plan view, similar to conventional supports.

[0028] Furthermore, the storage space 24 is configured to accommodate the leg end portion V12 by inserting the leg end portion V12 into a storage opening 241 formed on the front side Y1, but may have a different configuration. For example, the storage opening 241 may be formed on the upper side Z1 of the storage space 24. In that case, when the leg end portion V12 is inserted into the storage opening 241 from the upper side Z1 and accommodated in the storage space 24, a portion of the storage opening 241 may be closed by the opening / closing part 4, and the remaining portion of the storage opening 241 may form the fitting hole 242.

[0029] 5 and 6, the ground contact portion 3 is a member having a contact surface with the jack base 1. The ground contact portion 3 is an elastic member such as rubber, and is provided so as to be elastically deformable in the vertical direction Z. The ground contact portion 3 is formed in a circular shape that is slightly smaller than the main body portion 2 in a plan view. The ground contact portion 3 includes an upper ground contact surface 31, a side ground contact surface 32, a lower ground contact surface 33, and a third insertion hole (insertion hole) H3.

[0030] The grounding upper surface 31 is a horizontal plane portion at the end of the upper side Z1 of the grounding part 3. The grounding upper surface 31 is formed in a planar shape that faces the up-down direction Z. The grounding upper surface 31 is disposed so as to abut against the lower side Z2 of the main body lower surface 25.

[0031] The ground contact side 32 is a side portion of the ground contact part 3. The ground contact side 32 is formed in a substantially cylindrical shape extending in the vertical direction Z. An upper side Z1 of the ground contact side 32 is arranged so as to abut the inside of the main body side 22. A lower side Z2 of the ground contact side 32 is located further below the end of the lower side Z2 of the main body side 22, and is arranged so as to be exposed from the main body 2. Ground contact corners 34 provided at the end of the upper side Z1 and the end of the lower side Z2 of the ground contact side 32 are chamfered at approximately 45°.

[0032] The lower ground contact surface 33 is a horizontal plane portion at the end of the lower side Z2 of the ground contact portion 3, and corresponds to the ground contact surface of the jack base 1. The upper ground contact surface 31 is formed in a planar shape facing the vertical direction Z. When the jack base 1 is placed on the track L, the lower ground contact surface 33 elastically deforms and comes into close contact with the track L (inclined surface L2 and crushed stone L3).

[0033] The third insertion hole H3 is a hole portion along the vertical direction Z through which the screw portion J12 of the fastener J1 is inserted. The third insertion hole H3 is formed to face the screw hole of the nut J2 and the second insertion hole H2 on the lower surface 25 of the main body. An upper hole portion H31, which is a recess (space) that accommodates the nut J2, is formed on the upper side Z1 of the third insertion hole H3. A lower hole portion H32, which is a recess (space) that accommodates the bolt head J11 of the fastener J1, is formed on the lower side Z2 of the third insertion hole H3.

[0034] A generally cylindrical collar J3 slightly larger than the threaded portion J12 is inserted into the third insertion hole H3. The collar J3 is formed to be the same size as or slightly larger than the third insertion hole H3 in the vertical direction Z. Plate-shaped washers J31 are disposed on the end of the upper side Z1 of the collar J3, i.e., the lower side Z2 of the upper hole H31, and the end of the lower side Z2 of the collar J3, i.e., the upper side Z1 of the lower hole H32, facing each other in the vertical direction Z. The threaded portion J12 of the fastener J1 is inserted through the collar J3, the washer J31, and the second insertion hole H2 and fastened to the threaded hole of the nut J2. The grounding portion 3 is detachably connected to the main body 2 by fastening the fastener J1 to the nut J2. The grounding portion 3 is connected to the main body 2 without deformation by the bolt head J11 engaging the lower side Z2 of the collar J3.

[0035] The shape, material and configuration of the grounding part 3 are not limited as long as it can be in close contact with the line L. The ground contact portion 3 is formed of an elastic material because it can be elastically deformed to come into close contact with the track L without being affected by unevenness, but it may also have a different configuration. For example, the ground contact portion 3 may be formed of a rigid material. In that case, by placing a portable floor plate or rubber sheet between the ground contact portion 3 and the track L, the jack base 1 can come into close contact with the track L without being affected by unevenness.

[0036] Furthermore, in order to prevent breakage or detachment due to excessive elastic deformation, the ground contact portion 3 has a configuration in which it abuts against the main body side surface 22 and has a configuration in which the ground contact corner 34 is chamfered, but a different configuration is also possible. For example, the ground contact portion 3 may be provided in a partial range of the main body lower surface 25, and the ground contact side surface 32 and the main body side surface 22 may not abut against each other. Furthermore, the ground contact corner 34 does not have to be chamfered.

[0037] Furthermore, the grounding part 3 is detachably connected to the main body 2 by fastening the fastener J1 so that it can be replaced with an unused part if it is damaged or falls off, but it may have a different configuration. For example, the grounding part 3 may be configured to be adhered to the bottom surface 25 of the main body with an adhesive or the like.

[0038] Furthermore, the ground contact portion 3 has a configuration in which the bolt head J11 is engaged with the underside Z2 of the collar J3 to prevent breakage or detachment due to deformation caused by tightening the fastener J1, but a different configuration is also possible. For example, the main body 2 may have a hole-shaped female thread portion with a predetermined depth so that the bolt head J11 does not come into contact with the ground contact portion 3 when the fastener J1 is tightened. In that case, the ground contact portion 3 can be prevented from breakage or detachment due to deformation caused by tightening without using the collar J3.

[0039] 2 to 5, the opening / closing part 4 is a member that closes the storage opening 241 of the main body part 2. When the opening / closing part 4 closes the storage opening 241, the opening / closing part 4 has a peripheral edge with substantially the same curvature as the main body part 2 in a plan view, and has a fitting edge 45 in the center that forms part of the fitting hole 242. The opening / closing part 4 is, for example, a steel member, and has rigidity that is capable of supporting the weight of the jack base 1. The opening / closing section 4 includes a first opening / closing upper surface 41, a second opening / closing upper surface 42, and an opening / closing side surface 43.

[0040] The first openable top surface 41 is one of the plate-shaped members provided on the upper side Z1 of the openable / closable unit 4 and facing the vertical direction Z. The first openable top surface 41 is located on the left side X2 of the openable / closable unit 4 when the openable / closable unit 4 closes the storage opening 241. The first openable top surface 41 is disposed so as to substantially abut a portion of the upper side Z1 of the main body top surface 21 of the main body 2. A fourth insertion hole H4 is formed in the first openable / closable top surface 41 at a position facing the first insertion hole H1 of the main body 2. The openable / closable unit 4 and the main body 2 are connected by a rotation shaft 44, which is a pin-shaped connector inserted through the first insertion hole H1 and the fourth insertion hole H4, so as to be rotatable along the circumferential direction C, with the extension direction of the rotation shaft 44 (vertical direction Z) serving as the rotation axis. A portion of the periphery of the first openable / closable top surface 41 is formed integrally with the left side X2 of the end of the upper side Z1 of the openable / closable side surface 43. An engagement edge 45 curved with substantially the same curvature as the engagement hole 242 is formed at the end of the first openable upper surface 41 on the side away from the openable side surface 43 .

[0041] The second open-close top surface 42 is the other of the plate-shaped members provided on the upper side Z1 of the open-close unit 4 and facing the vertical direction Z. The first open-close top surface 41 is located on the right side X1 of the open-close unit 4 when the open-close unit 4 closes the storage opening 241. The first open-close top surface 41 is positioned so as to substantially abut a portion of the upper side Z1 of the main body top surface 21 of the main body 2 when the open-close unit 4 closes the storage opening 241. The second open-close top surface 42 is formed with a claw-shaped engaging protrusion P that engages with the engaging fitting R of the main body 2. When the open-close unit 4 closes the storage opening 241, the engaging protrusion P is detachably engaged with the engaging fitting R by operating the engaging fitting R. When the engaging protrusion P and the engaging fitting R are engaged, the open-close unit 4 is prevented from rotating in the circumferential direction C and is integrated with the main body 2. A portion of the periphery of the second open-close top surface 42 is formed integrally with the right side X1 of the end of the upper side Z1 of the open-close side surface 43. The end of the second openable upper surface 42 on the side away from the openable side surface 43 is formed in a shape that does not interfere with the fitting hole 242.

[0042] The opening / closing side surface 43 is a side surface portion of the ground contact portion 3 extending in the vertical direction Z. In a plan view, the opening / closing side surface 43 is formed in a wall shape with approximately the same curvature as the main body portion 2. The opening / closing side surface 43 is formed in a shape that covers the entire area of the accommodation opening 241 when the engaging protrusion P and the engaging fitting R are engaged, and is positioned so as to approximately abut against a portion of the main body side surface 22.

[0043] The shape, material, and configuration of the opening / closing part 4 are not limited as long as it can close the accommodation opening 241 with the leg end part V12 accommodated in the accommodation space 24. The opening / closing part 4 includes a pivot shaft 44 and an engaging protrusion P to facilitate attachment and detachment of the jack base 1 and the leg end part V12 without using tools, but may have a different configuration. For example, the opening / closing part 4 may be configured to be detachably connected to the main body part 2 by a connector such as a screw, or may be configured to be integrated with the leg end part V12 by welding or the like.

[0044] In addition, the opening / closing part 4 is shown as being made of a steel member in order to support part of the weight of the jack base 1 when the outrigger V1 is retracted while connected to the leg end part V12, but it may have a different configuration. For example, if the main body 2 is configured to be able to support the entire weight of the jack base 1, the opening / closing part 4 may be made of other materials such as a plastic material or an elastic material.

[0045] Furthermore, although the opening / closing unit 4 has a shape including a fitting edge 45 that closes the entire storage opening 241 and forms part of the fitting hole 242, it may have a different configuration. For example, the opening / closing unit 4 may be configured to close only the storage opening 241. In that case, the fitting hole 242 is formed only on the main body top surface 21. For example, the opening / closing unit 4 may be configured to close only part of the storage opening 241. In that case, the storage space 24 can accommodate the leg end V12 when the remaining part of the storage opening 241 is smaller than the leg end V12.

[0046] The jack base 1 according to this embodiment configured as described above can support the outrigger V1 of the road-rail vehicle V by the following procedure.

[0047] First, as shown in Figure 1, the road-rail vehicle V travels on the track L1 using the track traveling mechanism V2 and moves to a designated work location on the track L. Next, when the road-rail vehicle V arrives at the designated work location, it stops traveling and extends the multiple arms of the outriggers V1 to the outside of the vehicle body.

[0048] Next, the worker attaches the jack base 1 to each of the leg end portions V12 of the multiple leg portions V11 of the outrigger V1. As shown in FIG. 2, the worker grasps the jack base 1a with the storage opening 241 open, moves the storage opening 241 from the rear side Y2 of the leg end portion V12 to the front side Y1, and places the leg end portion V12 inside the storage space 24. Thereafter, as shown in FIG. 3, the worker rotates the opening / closing part 4 along the circumferential direction C, and engages the engaging protrusion P with the engaging fitting R while closing the storage opening 241, thereby integrating the leg end portion V12 and the jack base 1b with the storage opening 241 closed.

[0049] Next, as shown in FIG. 1, the road-rail vehicle V extends the multiple legs V11 of the outrigger V1 toward the downward side Z2, and the leg end portions V12 connected to the jack base 1b touch the track L. As the legs V11 extend, the leg end portions V12 press the body intermediate surface 23 of the jack base 1b toward the downward side Z2, and touch the track L via the jack base 1b. The ground contact portion 3 of the jack base 1b elastically deforms in the vertical direction Z due to the pressing force received from the leg end portions V12, and comes into close contact with the crushed stone L3 laid on the inclined surface L2 of the track L. When each of the jack bases 1b connected to the leg end portions V12 of the multiple legs V11 touches the track L, the outrigger V1 touches the track L, and tipping over of the road-rail vehicle V is suppressed.

[0050] Next, the worker uses the work equipment (such as a lifting machine or aerial work equipment) of the road-rail vehicle V to carry out work such as inspecting and updating various facilities installed on the tracks.

[0051] After completing the work, the road-rail vehicle V retracts the arms and legs V11 of the outrigger V1 and stores the outrigger V1. At this time, because the jack base 1b is lightweight and small (slightly larger than the leg ends V12 in plan view), the outrigger V1 can be stored with the leg ends V12 and the jack base 1b connected. Furthermore, because the external shape of the jack base 1b does not have any corners, the risk of damage caused by contact between the jack base 1b and various equipment (not shown) such as wiring on the road-rail vehicle V, which is a concern when storing the outrigger V1, can be reduced.

[0052] Next, the road-rail vehicle V travels on the track L1 using the track traveling mechanism V2 to move to the next work location. When the road-rail vehicle V arrives at the next work location, it stops traveling and grounds the outrigger V1 to the track L. At this time, since the jack base 1b is connected to the leg end V12 of the outrigger V1, there is no need to reconnect the jack base 1b. After the outrigger V1 has grounded, the worker carries out the work using the work equipment of the road-rail vehicle V. The worker repeats the above steps until all work areas have been completed.

[0053] After completing work at all work locations, the worker removes the jack base 1b from the leg end portion V12. The worker operates the engaging fitting R to disengage the engaging protrusion P from the engaging fitting R, and then rotates the opening / closing part 4 along the circumferential direction C to unblock the storage opening 241. The worker then grasps the jack base 1a with the storage opening 241 now open, moves it toward the rear side Y2, and removes the leg end portion V12 from the storage space 24.

[0054] The work of grounding the outriggers V1 of the road-rail vehicle V using the jack base 1 is not particularly limited as long as the multiple leg end portions V12 can be grounded on the track L. The order in which the steps involved in the grounding of the outriggers V1 of the road-rail vehicle V by the jack base 1 may be performed may be changed as appropriate. Furthermore, the steps involved in the grounding of the outriggers V1 of the road-rail vehicle V by the jack base 1 may be added or omitted as appropriate.

[0055] As described above, the jack base 1 according to this embodiment is a jack base used for grounding an outrigger V1, which is provided on a road-rail vehicle V that can travel on a road surface and a track L1 by switching its traveling mechanism, and has a leg V11 that extends and retracts along the vertical direction Z and a leg end V12 provided at the lower end of the leg V11, and includes a main body 2 formed of a rigid member and a grounding part 3 formed of an elastic member and connected to the lower end of the main body 2. The main body 2 has an accommodation space 24 capable of accommodating the leg end V12, an accommodation opening 241 that communicates with the accommodation space 24 and is formed in a size that allows the leg end V12 to be inserted therethrough, and an opening / closing part 4 that closes at least a portion of the accommodation opening 241.

[0056] The jack base 1 can be easily connected to the leg end portion V12 of the outrigger V1 provided on the road-rail vehicle V by inserting the leg end portion V12 into the storage opening 241 and placing it in the storage space 24, and then closing the storage opening 241 with the opening / closing part 4. Therefore, the jack base 1 has good workability and work efficiency.

[0057] Furthermore, since the ground contact portion 3 of the jack base 1 is made of an elastic material, it can elastically deform to come into contact with the inclined surface L2 and crushed stone L3 of the track L, and can make close contact without being affected by unevenness. This eliminates the need to install floor plates or the like on the track L for the jack base 1. Therefore, the jack base 1 has even greater workability and efficiency, and has high support performance.

[0058] Furthermore, since the main body 2 and the ground contact part 3 of the jack base 1 are connected by a fastener J1, the ground contact part 3 can be easily attached and detached. This allows the jack base 1 to easily replace the ground contact part 3 with an unused part if it becomes worn. Therefore, the jack base 1 is easy to maintain.

[0059] Furthermore, the jack base 1 has a collar J3 inserted into the threaded portion J12 of the fastener J1 that connects the main body 2 and the ground contact portion 3. This allows the bolt head J11 of the fastener J1 to engage with the underside Z2 of the collar J3, thereby connecting the ground contact portion 3 and the main body 2 without deforming the ground contact portion 3, thereby reducing the risk of damage to the ground contact portion 3. Therefore, the jack base 1 has even greater workability and high support performance.

[0060] Furthermore, in the jack base 1, when the opening / closing unit 4, which rotates in the circumferential direction C by the rotating shaft 44, closes the storage opening 241, the engaging protrusion P of the opening / closing unit 4 engages with the engaging fitting R of the main body 2, thereby connecting the main body 2 and the opening / closing unit 4. This allows the worker to close and open the storage opening 241 without using tools or the like. Furthermore, when working to close and open the storage opening 241, all components of the jack base 1 are connected to the main body 2, so no components will be lost. Therefore, the jack base 1 is even more excellent in terms of workability and efficiency.

[0061] Furthermore, the jack base 1 is formed in a circular shape that is slightly larger than the leg end portion V12 in a plan view. This allows the outrigger V1 to be stored with the leg end portion V12 and the jack base 1 connected, eliminating the need to rearrange the jack base 1 when moving the road-rail vehicle V. Furthermore, because the exterior shape of the jack base 1 has no corners, the risk of damage caused by contact between the jack base 1 and various equipment such as wiring on the road-rail vehicle V, which is a concern when storing the outrigger V1, can be reduced. Therefore, the jack base 1 is even more excellent in terms of workability and work efficiency.

[0062] Furthermore, the jack base 1 is lightweight and highly rigid because it includes a main body 2, which is a structural member constructed in a lattice pattern from multiple plate-like members including a plate-like pressure-resistant frame 26 extending in the vertical direction Z. As a result, when the outriggers V1 of the jack base 1 are stored, i.e., when the jack base 1 is separated from the track L and the main body top surface 21 and the leg end portion V12 are in contact, the main body top surface 21 can support its own weight and the outriggers V1 can support the jack base 1, eliminating the need for reinforcement of the outriggers V1. This further enhances the jack base 1's workability and work efficiency. [Example]

[0063] The present invention will be explained in more detail below using Tables 1 to 4, but the present invention is not limited to the following examples.

[0064] [Load-bearing test] A load-bearing test was conducted on the jack base 1 of the present invention. In the load-bearing test, a test load was applied to the jack base 1 in the vertical direction Z using a press, and then the jack base 1 was removed and inspected visually and its dimensions in the vertical direction Z were measured. The test load to be received by the jack base 1 was set based on the jack ground pressure of a road-rail vehicle V, with a maximum load of 4,972 kg and a safety factor of 1.32 or more, resulting in a test load of 7,000 kg. The load-bearing test was also conducted a total of five times on the same jack base 1.

[0065] The results of the load-bearing test are shown in Table 1. No changes were observed in the appearance or dimensions of the jack base 1 from the first to fifth tests. Therefore, it was shown that the jack base 1 can adequately support the outrigger V1 of the road-rail vehicle V without undergoing plastic deformation (compression or fracture).

[0066] [Table 1]

[0067] [Field Test] A field test was conducted on the jack base 1 of the present invention. In the field test, the outriggers V1 of a road-rail vehicle V placed on the track L1 of the track L constructed at a test site were used to ground the jack base 1 to the track L (inclined surface L2 and crushed stone L3). In the field test, a total of 15 grounding attempts were conducted under track conditions with a cant of less than 100, a total of 30 grounding attempts were conducted under track conditions with a cant of 100 or more, a total of 5 grounding attempts were conducted under track conditions with crushed stone L3, and a total of 5 grounding attempts were conducted under track conditions with an inclined surface L2. In addition, the field test was conducted twice under approximately the same temperature conditions. Note that cant refers to a structure of the track L1 in which the outer rail is higher than the inner rail to ensure smooth running of the train on the curved section of the track L1.

[0068] The results of the first field test are shown in Table 2. The results of the second field test are shown in Table 3. In Tables 2 and 3, the number of times that correction (position adjustment by the operator) was required for touchdown is shown as the number of touchdown corrections. In both track conditions of cant less than 100 and cant more than 100, the jack base 1 was in contact with the track L without requiring any correction in all trials. In the track condition where crushed stone L3 was placed, the jack base 1 was grounded to the track L without the need for correction in the majority of the trials. In addition, in the track condition where crushed stone L3 was placed, the jack base 1 was grounded to the track L in every trial by performing correction. In the track condition with the inclined surface L2, the jack base 1 was grounded to the track L without the need for correction, except for one time shown in Table 3. In addition, in the track condition with the inclined surface L2, the jack base 1 was grounded to the track L in every trial by performing correction. Therefore, it was shown that the jack base 1 can be grounded even in a configuration in which the track L has an inclined surface L2 and crushed stone L3.

[0069] [Table 2]

[0070] [Table 3]

[0071] It should be noted that in track conditions where crushed stone L3 is placed and where an inclined surface L2 is present, the support of the conventional outrigger V1 must be corrected.

[0072] [Boom extension test] A boom extension test was conducted on a road-rail vehicle V with its outrigger V1 grounded using the jack base 1 of the present invention. In the boom extension test, the aerial work boom, which is the work equipment of the road-rail vehicle V, was extended to its maximum extent with the jack base 1 connected to the outrigger V1 grounded on the track L, and the appearance of the jack base 1 was inspected after one hour. The track conditions for the boom extension test were a cant of 100 or more. In the boom extension test, the aerial work boom was extended toward the valley side (the front right of the vehicle body) without any load placed on the work platform. The boom extension test was conducted twice under approximately the same temperature conditions.

[0073] As a result of the boom extension test, no changes in appearance were observed in any of the jack bases 1. Therefore, it was shown that the jack base 1 can adequately support the outriggers V1 without plastic deformation (breakage, etc.) even when using the work equipment of the road-rail vehicle V.

[0074] [Driving test] A running test was conducted on a road-rail vehicle V with the outriggers V1 stored and the jack base 1 of the present invention connected to the leg end V12. In the running test, the road-rail vehicle V with the outriggers V1 stored and the jack base 1 connected to the leg end V12 was run for 3 km, and then the installation state of the jack base 1 and the amount of lowering of the leg end V12, i.e., the amount of lowering of the cylinder, were confirmed. The outriggers V1 of the road-rail vehicle V used in the running test were equipped with legs V11, leg end V12, and jack bases 1 at four locations: the front left, front right, rear left, and rear right of the vehicle body.

[0075] Table 4 shows the results of the running test. No change was observed in the installation state of the jack base 1 before and after the running test. In addition, no change was observed in the amount of descent of the cylinder of the road-rail vehicle V before and after the running test. Therefore, it was shown that the jack base 1 can be stored in the outrigger V1 while connected to the leg end V12. It was also shown that the road-rail vehicle V can run with the jack base 1 and outrigger V1 connected.

[0076] [Table 4]

[0077] The above examples have shown that the jack base 1 according to the present invention has the strength to support the outrigger V1 of the road-rail vehicle V. It has also been shown that the jack base 1 according to the present invention can effectively contact the track L including the inclined surface L2 and crushed stone L3. It has also been shown that the jack base 1 according to the present invention can be attached to the leg end V12 of the outrigger V1 at the start of work and continue the work without being removed until the end of the work, even when the road-rail vehicle V is traveling.

[0078] Although the embodiments and examples of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments and includes design modifications within the scope of the present invention. Furthermore, the components shown in the above embodiments and examples can be appropriately combined to form a configuration.

[0079] In this embodiment, the ground contact portion 3 is formed of an elastic material because it can be elastically deformed to come into close contact with the track L without being affected by unevenness, but it may have a different configuration. For example, the ground contact portion 3 may be formed of a rigid material. In that case, by placing a portable floor plate or rubber sheet between the ground contact portion 3 and the track L, the jack base 1 can come into close contact with the track L without being affected by unevenness.

[0080] In addition, in this embodiment, the ground contact portion 3 is configured to contact crushed stone L3 laid on the track L or an inclined surface L2 inclined relative to a horizontal plane, but a different configuration is also possible. For example, the ground contact portion 3 may be connected to a horizontal surface on which crushed stone L3 is not laid, such as the surface of a road. In this case, the jack base 1 can still support the outrigger V1.

[0081] In this embodiment, the grounding part 3 is detachably connected to the main body 2 by fastening the fastener J1 so that it can be replaced with an unused part if it is damaged or falls off, but it may have a different configuration. For example, the grounding part 3 may be configured to be adhered to the bottom surface 25 of the main body with an adhesive or the like.

[0082] In addition, in this embodiment, the ground contact portion 3 has a configuration in which the bolt head J11 is engaged with the underside Z2 of the collar J3 to prevent breakage or detachment due to deformation caused by tightening the fastener J1, but a different configuration is also possible. For example, the main body 2 may have a hole-shaped female thread portion with a predetermined depth so that the bolt head J11 does not come into contact with the ground contact portion 3 when the fastener J1 is tightened. In that case, the ground contact portion 3 can be prevented from breakage or detachment due to deformation caused by tightening without using the collar J3.

[0083] Furthermore, in this embodiment, the opening / closing unit 4 has a shape including a fitting edge 45 that closes the entire storage opening 241 and forms part of the fitting hole 242, but it may have a different configuration. For example, the opening / closing unit 4 may be configured to close only the storage opening 241. In that case, the fitting hole 242 is formed only on the main body top surface 21. Also, for example, the opening / closing unit 4 may be configured to close only part of the storage opening 241. In that case, the storage space 24 can accommodate the leg end V12 when the remaining part of the storage opening 241 is smaller than the leg end V12.

[0084] In addition, in this embodiment, the opening / closing unit 4 includes the pivot shaft 44 and the engaging protrusion P to facilitate attachment and detachment between the jack base 1 and the leg end V12 without using tools, but may have a different configuration. For example, the opening / closing unit 4 may be configured to be detachably connected to the main body 2 by a connector such as a screw, or may be configured to be integrated with the leg end V12 by welding, etc.

[0085] In this embodiment, the main body 2 is formed in a circular shape slightly larger than the leg end portion V12 in plan view so that the outrigger V1 can be completely retracted when connected to the leg end portion V12, but a different configuration is also possible. For example, the main body 2 may be formed in a rectangular plate shape in plan view, similar to conventional supports. [Explanation of symbols]

[0086] 1,1a,1b Jack base 2 Main body 3 Grounding part 4 Opening and closing section 24 Containment Space 44 Rotating shaft 241 Storage opening H3 Third insertion hole (insertion hole) J1 Fastener J3 color J12 screw part L track L1 orbit L2 slope L3 Crushed Stone P Engagement protrusion R Engagement bracket V Road-rail vehicle V1 Outrigger V11 legs V12 leg end Z vertical direction

Claims

1. A jack base used for grounding an outrigger, which is provided on a road-rail vehicle that can travel on a road surface and a track by switching the traveling mechanism, and has a leg portion that expands and contracts along the vertical direction and a leg end portion provided at the lower end of the leg portion, a main body formed of a rigid member; a grounding portion formed of an elastic member and connected to a lower end of the main body portion, The main body portion is a storage space capable of storing the leg end portion; an accommodation opening communicating with the accommodation space and formed to a size that allows the leg end portion to be inserted therethrough; and an opening / closing portion that closes at least a portion of the storage opening. Jack base.

2. The grounding portion is elastically deformed and grounded to a track having the track. The jack base of claim 1.

3. The grounding portion is in contact with crushed stone laid on the track or an inclined surface inclined with respect to a horizontal plane. The jack base according to claim 2.

4. The grounding portion is detachably connected to the lower end of the main body portion by a fastener. The jack base according to claim 2.

5. The grounding portion includes an insertion hole through which the fastener is inserted, The threaded portion of the fastener is inserted into the collar. The jack base according to claim 4.

6. The opening and closing section is The housing opening is formed in a wall shape that closes at least a portion of the housing opening, a pivot shaft portion that pivotally connects the opening / closing portion to the main body portion; and an engaging protrusion formed in a convex shape that engages with the main body when the opening / closing part closes the storage opening. The jack base of claim 1.

7. The main body portion includes an engaging fitting that detachably engages with the engaging protrusion of the opening / closing portion. The jack base according to claim 6.

8. The outer shape of the main body is formed in a circular shape larger than the leg end portion in a plan view seen from the vertical direction. A jack base according to any one of claims 1 to 7.

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