JP2016088732A - Jack device for high place work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jack device for a high place work vehicle capable of preventing the damage of a road surface when the jack device is installed, saving troubles for installing a jack base, and preventing the sliding movement of a vehicle when the jack is installed on an inclined surface to carry out high place work.SOLUTION: A jack device for a high place work vehicle includes: a jack portion provided on a vehicle side part and extending in a lower side of a vehicle and a diagonal outside direction; a ground portion provided under the jack portion to ground with a road surface; and a connecting portion which rockably connects the ground portion to the jack portion. The ground portion has a ground surface structure having a hard member with small sliding resistance with the road surface, and an elastic member with larger sliding resistance with the road surface than the hard member. The ground surface structure slides toward the outside of the vehicle on the road surface during the extending action of the jack portion, and fixes the ground portion on the road surface by catching the road surface with the elastic member part, when the jack portion stops the extending action.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a jack device for an aerial work vehicle, and more particularly to a jack device for an aerial work vehicle having jack portions provided on both left and right sides of the vehicle and extending downward and obliquely outward of the vehicle.

  The aerial work vehicle is provided with a jack device for ensuring the stability of the vehicle when working at a high place. 2. Description of the Related Art As a kind of jack device for an aerial work vehicle, there is conventionally known a jack device that is installed on both left and right sides of a vehicle and has a jack portion that extends downward and obliquely outward of the vehicle. In this type of high-altitude work vehicle jack device, the stability of the vehicle is ensured by extending the jack portion at the time of high-altitude work and grounding and supporting the vehicle by grounding the lower end portion thereof.

  10 (a) to 10 (c) show a conventional jack device 50 for an aerial work vehicle. A conventional jack machine 50 for an aerial work vehicle has a jack portion composed of an outer jack 51 and an inner jack 52, and an upper connecting member 54, a lower connecting member 55 and a jack pad connecting pin 56 are connected to the jack portion. The jack pad 53 is swingably connected by the connecting portion (see FIG. 10C). When not working at a high place, the inner jack 52 is accommodated in the outer jack 51 (see FIGS. 10A and 10B). And when installing a jack in order to perform work at a high place, the inner jack 52 projects from the outer jack 51 downward and obliquely outward. At this time, in order to prevent the jack pad 53 from rubbing and damaging the road surface, a jack base 57 is previously installed on the road surface. Then, after the jack pad 53 connected to the inner jack 52 is landed on the jack base 57, the inner jack 52 is further projected to support the vehicle by floating (FIG. 10 (c)).

In FIG. 1 of Patent Document 1, jacks 15 and 17 extending toward the lower side of the vehicle body are provided on the front, rear, left and right of an aerial work vehicle, and the jack cushion material made of hard plastic is provided at the lower end of each jack 15 and 17. 21 is described.
In FIG. 3 of Patent Document 2, telescopic jacks 21 that are inclined toward the lower side of the vehicle body and obliquely outward are provided on the left and right side portions of the vehicle body 3 of the aerial work vehicle. It is described that a jack pad 30 pivotably pivotable in the left-right direction is provided, and a jack base 40 movably attached in the left-right direction of the vehicle body is provided below the jack pad 30.

  However, in the conventional high-altitude work vehicle jack device 50 shown in FIG. 10, it is necessary to install a jack base on the road surface every time the high-altitude work is performed, and to clean it up after the work is completed. It took time and effort to clean up. Moreover, in the jack apparatus described in Patent Document 1, since the jack cushion material 21 made of hard plastic is provided at the lower end of the jack, there is no need to install and clean up the jack base, but the jack is installed on an inclined surface. When working at a high place, the sliding resistance between the hard plastic and the road surface is small, which may cause the vehicle to slide.

Utility Model Registration No. 3044881 Japanese Patent No. 3869372

  The present invention has been made in view of the above-mentioned problems, prevents damage to the road surface when installing the jack device, saves the trouble of installing the jack base, and installs the jack on an inclined surface. It is an object of the present invention to provide a jack apparatus for an aerial work vehicle capable of preventing the vehicle from sliding during a work.

  A jack apparatus for an aerial work vehicle according to the present invention is provided on both left and right side portions of a vehicle equipped with a work facility, and is provided below a jack portion that extends downward and obliquely outward of the vehicle. A grounding part in contact with a road surface; and a connecting part for swingably connecting the grounding part to the jack part. The jack part is extended to ground the grounding part, and the vehicle is lifted A jack device for an aerial work vehicle to be supported, wherein the grounding portion includes a hard member having a small sliding resistance with respect to the road surface and an elastic member having a larger sliding resistance with respect to the road surface than the hard member. A grounding surface structure, wherein the grounding surface structure slides on the road surface toward the outside of the vehicle during the extension operation of the jack portion, and at the stage where the jack portion stops the extension operation, The path in the elastic member part The captured, characterized in that to fix the grounding portion on the road surface.

Further, the ground contact surface structure includes: the hard member and the elastic member, the hard member being in a region far from the vehicle width central portion of the vehicle; and the elastic member being close to the vehicle width central portion of the vehicle. It can be configured to be arranged in each of the regions.
Further, the ground contact surface structure is such that, of the hard member and the elastic member, the elastic member is disposed in a region near the center of the ground contact surface structure, and the hard member is disposed in a peripheral region thereof. It can be constituted as follows.

The jack portion may be configured to be connected to the grounding portion via the connecting portion at a position farther from the center of the vehicle than the center of the grounding portion.
Further, the connecting portion passes through the first connecting member connected to the jack portion, the second connecting member connected to the grounding portion, the first and second connecting members, and the grounding portion. A shaft member that serves as a rotation shaft when swinging, and the grounding portion is provided at a base portion that is connected to the second connecting member, and a lower portion of the base portion. A rotation part that rotates 180 degrees around the center part, and that includes the ground plane structure at a lower part thereof; and a lock mechanism that locks and unlocks the base part and the rotation part, The central portion can be configured to be positioned almost directly below the shaft member after being rotated 180 degrees.

  As described above, the jack device for an aerial work vehicle according to the present invention has a ground contact surface structure in which a ground member has a hard member having a small sliding resistance with respect to the road surface and an elastic member having a larger sliding resistance with respect to the road surface than the hard member. Have Therefore, the grounding surface structure of the grounding portion slides on the road surface toward the outside of the vehicle during the extension operation of the jack portion. Further, when the jack portion stops the extending operation, the road surface is captured by the elastic member and the grounding portion is fixed on the road surface. As a result, it is possible to prevent damage to the road surface during jack installation work. Moreover, the trouble of installing the jack base for preventing road surface damage can be saved. Furthermore, the side-sliding operation between the grounding portion and the road surface when the vehicle is levitated can be performed smoothly, and the vehicle can be easily installed for high-altitude work. In addition, it is possible to prevent the vehicle from sliding when performing work at a high place by installing a jack on an inclined surface.

(A) is a side view of the vehicle 110 to which the jack apparatus 100 of an aerial work vehicle of the present invention is attached, and (b) is a rear view of the vehicle 110 in FIG. (A), (b) is a side view of the jack apparatus 100 for an aerial work vehicle of the present invention ((a) when stored and (b) when extended). (A) is a perspective view from the upper side of the jack pad 130 of the jack apparatus 100 of the aerial work vehicle of the present invention, (b) is a perspective view from the lower side of the jack pad 130 in FIG. (D) is a perspective view from below of the jack pad 130 of the modification of the jack apparatus 100 of an aerial work vehicle. Explanatory drawing explanatory drawing of the jack apparatus 100 of the aerial work vehicle of this invention. (A), (b) is a side view of the jack device 200 for an aerial work vehicle of the present invention (when (a) is stored and (b) is extended), and (c) is an aerial work vehicle of the present invention. The perspective view from the upper part of the jack pad 230 of the jack apparatus 200, (d) is a perspective view from the lower part of the jack pad 230 of FIG.5 (c). (A), (b) is a side view of the jack apparatus 300 for an aerial work vehicle of the present invention ((a) when stored and (b) when extended). (A), (b) is the perspective view from the upper side of the jack pad 330 of the jack apparatus 300 of the aerial work vehicle of this invention ((a) Before rotation board 336 rotation and (b) After rotation board 336 rotation), (C) is a perspective view from the lower side of the jack pad 330 of FIG. 7 (a), (b). The figure showing the mode before and behind rotation of the rotating plate 336 of the jack pad 330 of the jack apparatus 300 of the aerial work vehicle of this invention. Explanatory drawing of the extension operation | movement of the jack apparatus 300 of the aerial work vehicle of this invention. (A), (c) is a side view of the jack device 50 of a conventional aerial work vehicle (when (a) is stored and (c) is extended), and (b) is FIG. 10 (a), (c). The perspective view from the upper direction of the jack pad 53 of FIG.

[Example 1]
A jack apparatus 100 for an aerial work vehicle according to the present invention will be described with reference to FIGS. FIG. 1 (a) is a side view of a vehicle 110 to which a jack device 100 for an aerial work vehicle according to the present invention is attached, and FIG. 1 (b) is a rear view of the vehicle 110 of FIG. 1 (a). 2 (a) and 2 (b) are side views of the jack device 100 for an aerial work vehicle according to the present invention ((a) when stored and (b) when extended), and FIG. 3 (a) shows the present invention. FIG. 3B is a perspective view from above of the jack pad 130 of the jack device 100 of the aerial work vehicle, and FIG. 3B is a perspective view from below of the jack pad 130 of FIG. ) (D) is a perspective view from below of a jack pad 130 of a modified example of the jack device 100 for an aerial work vehicle, and FIG. 4 is an operation explanatory view of the jack device 100 for an aerial work vehicle of the present invention. is there.

  Referring to FIGS. 1 (a) and 1 (b), a vehicle 110 equipped with work equipment includes a truck cabin 111 having a driver's seat, a truck chassis frame 112, traveling wheels 113, and a subframe attached to the truck chassis frame 112. 114, a swivel base 115 installed on the subframe 114, a boom 116 disposed on the swivel base, and a work table 117 attached to the tip of the boom 116. The swivel base 115 is rotated by a hydraulic motor (not shown), and the boom 116 is constructed by a well-known technique so as to be raised and lowered by a raising and lowering cylinder connected to the central part of the boom 116. Thereby, the position of the workbench 117 is moved as necessary, and the worker performs the high place work on the workbench 117.

  The aerial work vehicle jack device 100 of the present invention is installed in the vehicle 110. 2 (a) and 2 (b) in addition to FIG. 1, the jack device 100 for an aerial work vehicle according to the present invention includes a jack portion 120 provided on both right and left sides of the vehicle 110, and a jack portion 120. Are provided with a jack pad 130 provided below and a connecting portion 140 that swingably connects the jack pad 130 to the jack portion 120.

  The jack portion 120 is provided in a total of four outer jacks 121 that are welded and connected to the subframe 114 at the back of each wheel 113, and the longitudinal direction of each outer jack. And inner jacks 122 that can be freely expanded and contracted. Here, since each outer jack 121 is attached to the subframe 114 in an inclined state, each inner jack 122 extends downward and obliquely outward of the vehicle 110.

  A jack pad 130 that contacts the road surface is provided below the jack portion 120. The jack portion 120 and the jack pad 130 are connected by a connecting portion 140. The connecting portion 140 includes an upper connecting member 141 attached to the lower end of the inner jack 122, a lower connecting member 142 attached to the base portion 131 of the jack pad 130, and a jack pad connecting pin 143. . The jack pad connecting pin 143 passes through holes provided in the upper connecting member 141 and the lower connecting member 142, connects the two members, and serves as a rotating shaft of both members. Therefore, the inner jack 122 to which the upper connecting member 141 is attached and the jack pad 130 to which the lower connecting member 142 is attached are connected in a swingable manner.

  The jack pad 130 includes a base portion 131, a hard plastic member 133 having a small sliding resistance with respect to the road surface, and a rubber member 132 having a larger sliding resistance with respect to the road surface than the hard plastic member 133 (FIG. 3). (See (a) and (b)). The hard plastic member 133 and the rubber member 132 each have a bolt hole 134 and are fixed to the base 131 by a bolt 135 to form a ground plane structure S1-1.

  Here, the ground plane structure S <b> 1-1 includes a hard plastic member 133 and a rubber member 132. Therefore, when the jack pad 130 is grounded, the road surface is not scraped or dug up, and damage to the road surface can be prevented. Further, since the jack pad 130 has such a ground plane structure S1-1, it is not necessary to prepare a jack base separately, and the labor for installing the jack base can be saved. Furthermore, since the ground contact surface structure S1-1 has not only the rubber member 132 but also the hard plastic member 133, even when the boom 116 is operated and the load on the jack pad 130 is changed during work at a high place, it is hard. The plastic member 133 is hardly deformed and can be safely operated at a high place in a state where stability is ensured.

  Further, since the ground plane structure S1-1 includes the hard plastic member 133 having a small sliding resistance with respect to the road surface, when the inner jack 122 is extended with the jack pad 130 in contact with the road surface, the ground plane structure S1-1 is Smoothly slides on the road surface. Therefore, the inner jack 122 can be extended to smoothly perform the side-sliding operation between the jack pad 130 and the road surface when the vehicle 110 is lifted, and the vehicle 110 can be easily installed for work at a high place. it can.

  Further, since the ground contact surface structure S1-1 includes the rubber member 132 having a sliding resistance larger than that of the hard plastic member 133, the rubber is raised at the stage where the vehicle 110 is lifted and the extension operation of the inner jack 122 is stopped. The part of the member 132 captures the road surface and fixes the jack pad 130 on the road surface. Therefore, after the vehicle 110 is lifted and supported on the inclined surface, the vehicle 110 can be prevented from sliding when performing work at a high place.

  In the ground contact surface structure S1-1 of the present embodiment, the hard plastic member 133 out of the hard plastic member 133 and the rubber member 132 is disposed in a region on the traveling direction side of the vehicle 110 of the ground contact surface structure S1-1. In the ground plane structure S1-1, they are arranged in regions opposite to the traveling direction of the vehicle 110 (FIGS. 3A and 3B).

  3C and 3D are modified examples in which the ground plane structure S1-1 of the present embodiment is modified. In the ground contact surface structure S1-2 of the modified example shown in FIG. 3C, the hard plastic member 133 is located in the region near the center of the ground contact surface structure S1-2, out of the hard plastic member 133 and the rubber member 132. Are arranged in the surrounding area surrounding the rubber member 132. In the ground contact surface structure S1-3 of the modification shown in FIG. 3D, the rubber member 132 of the hard plastic member 133 and the rubber member 132 is located near the center of the ground contact surface structure S1-3 from the vehicle width center portion of the vehicle 110. The hard plastic member 133 is disposed in the region surrounding the rubber member 132 in a U-shape.

  Next, the operation (overhanging operation) of the jack apparatus 100 for an aerial work vehicle according to the present invention will be described with reference to FIG. FIG. 4A shows a state before the extension operation of the jack device 100 of the aerial work vehicle is started. At this stage, the inner jack 122 and the connecting portion 140 are housed in the outer jack 121, and the jack pad 130 does not protrude beyond the vehicle width of the vehicle 110. When the inner jack 122 is extended to install the jack device, the connecting portion 140 and the inner jack 122 are exposed outside the outer jack 121.

  If the inner jack 122 is continuously extended as it is, a part of the ground contact surface structure S1-1 of the jack pad 130 swingably connected to the lower side of the inner jack 122 comes into contact with the road surface (FIG. 4B). As the inner jack 122 extends, the jack pad 130 rotates with the jack pad connection pin 143 as the rotation axis, and the entire surface of the ground contact surface structure S1-1 of the jack pad 130 contacts the road surface. Further, when the inner jack 122 is extended, the vehicle 110 starts to rise. At this time, the ground contact surface structure S1-1 slides on the road surface in the outward direction of the vehicle 110 (FIG. 4C). Thereafter, when the extension operation of the inner jack 122 is stopped, the ground contact surface structure S1-1 catches the road surface by the rubber member 132 and fixes the jack pad 130 on the road surface (FIG. 4D).

  Next, the usage method when using the jack apparatus 100 of the aerial work vehicle of the present invention that performs such an overhanging operation for the aerial work will be described. First, the vehicle 110 provided with the work facility is stopped at a work position where work at a high place is performed. Next, the inner jacks 122 of the two jack portions 120 installed on the front wheel side of the vehicle 110 are extended, and then the inner jacks 122 of the two jack portions 120 installed on the rear wheel side of the vehicle 110 are extended. The vehicle 110 is levitated. At this time, as described above, the ground contact surface structure S <b> 1-1 slides on the road surface to facilitate the extension of each inner jack 122.

  Next, to adjust the level of the vehicle 110, the extension of each inner jack 122 is finely adjusted. As a result, the vehicle 110 is in a state where it can work at a high place. In this state, the worker works at a high place. At this time, as described above, the jack pad 130 is fixed to the road surface by the rubber member 132 of the ground contact surface structure S1-1, the sliding movement of the vehicle 110 is prevented, and the work can be performed safely even on an inclined surface. Further, even when the boom 116 is operated and the load on the jack pad 130 changes, the ground plane structure S1-1 has the hard plastic member 133 that hardly deforms due to the load, so that the safety is ensured in a stable state. Can work.

  After the work in high places is completed, the inner jacks 122 of the two jack portions 120 installed on the rear wheel side of the vehicle 110 are accommodated, and then the two jack portions 120 installed on the front wheel side of the vehicle 110 are stored. Each inner jack 122 is accommodated and the vehicle 110 is landed. When each inner jack 122 is completely stored in each outer jack 121, the vehicle 110 is moved from the work position.

  As described above, the jack apparatus 100 for an aerial work vehicle according to the present embodiment includes the hard plastic member 133 having a small sliding resistance with respect to the road surface and the rubber member 132 having a larger sliding resistance with respect to the road surface than the hard plastic member 133. It has a ground plane structure S1-1. Therefore, the ground contact surface structure S <b> 1-1 slides on the road surface toward the outer side of the vehicle 110 during the extension operation of the inner jack 122. Further, when the extension operation of the inner jack 122 is stopped, the road surface is caught by the rubber member 133 and the jack pad 130 is fixed on the road surface. As a result, the road surface can be prevented from being damaged without being scraped or dug back during the jack installation work. In addition, since the jack pad 130 has such a ground contact surface structure S1-1, it is not necessary to install a jack base for preventing road surface damage, and the labor for installing the jack base can be saved. In addition, the inner jack 122 can be extended to smoothly carry out a side-sliding operation between the jack pad 130 and the road surface when the vehicle 110 is lifted, and the vehicle 110 can be easily installed for working at a high place. it can. Furthermore, after the vehicle 110 is lifted and supported on the inclined surface (after the jack is installed), the vehicle 110 can be prevented from sliding when performing a work at a high place.

[Example 2]
Next, the jack apparatus 200 for an aerial work vehicle according to the present invention will be described with reference to FIGS. 5 (a) and 5 (b) are side views of the jack device 200 for an aerial work vehicle of the present invention ((a) when stored and (b) when extended), and FIG. 5 (c) shows the present invention. It is a perspective view from the upper side of the jack pad 230 of the jack apparatus 200 of an aerial work vehicle, and FIG.5 (d) is a perspective view from the downward direction of the jack pad 230 of FIG.5 (c). In addition, about the component same as Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The jack apparatus 200 for an aerial work vehicle includes a jack part 120, a jack pad 230, and a connection part 140. The jack part 120 and the connection part 140 have the same configuration as in the first embodiment. The jack pad 230 includes a hard plastic member 133 and a rubber member 132 as in the first embodiment. However, the ground plane structure S2 is different from the first embodiment. That is, in the ground contact surface structure S <b> 2 of the present embodiment, the hard plastic member 133 is in the region far from the vehicle width center portion of the vehicle 110 and the rubber member 132 is the vehicle 110 of the vehicle 110. They are arranged in the region near the width center.

  In the ground plane structure S2, a region far from the vehicle width central portion of the vehicle 110 where the hard plastic member 133 is disposed is a ground plane during jack installation work (when the inner jack is extended to lift the vehicle 110). The structure S2 hits the sliding direction side. Therefore, the ground plane structure S2 can be slid more easily during the jack installation work.

In the present embodiment, the jack portion 120 is connected to the jack pad 230 via the connecting portion 140 at a position farther from the center of the jack pad 230 to the vehicle width center portion of the vehicle 110. As a result, when the jack device is installed (when the vehicle 110 is lifted and supported), the overturning fulcrum of the vehicle 110 becomes far from the vehicle 110, and the stability of the vehicle 110 during high-altitude work is increased. In addition, a hard plastic member 133 that is hardly deformed by a load is located below the overturning fulcrum, so that even if the load on the jack pad 230 changes due to the operation of the boom 116, the rubber material remains below the overturning fulcrum. It is possible to safely perform work at a high place in a state in which stability is ensured as compared with some cases.
In addition, since the operation | movement and usage method of the jack apparatus 200 of an aerial work vehicle of a present Example are the same as that of the jack apparatus of Example 1, description is abbreviate | omitted.

  As described above, the jack apparatus 200 for an aerial work vehicle according to the present embodiment has the ground plane structure S2. In the ground plane structure S2, the region where the hard plastic member 133 is far from the vehicle width center portion of the vehicle 110. That is, it is disposed in the region corresponding to the traveling direction side where the ground contact surface structure S2 slides when the jack is installed (when the inner jack 122 is extended to lift the vehicle 110). Therefore, the ground plane structure S2 can be slid more easily during the jack installation work. Further, the jack portion 120 is connected to the jack pad 230 via the connection portion 140 at a position farther from the center of the jack pad 230 than the center of the vehicle width of the vehicle 110. Therefore, when the jack device is installed (when the vehicle 110 is lifted and supported), the hard plastic member 133 that is hardly deformed by the load is located below the overturning fulcrum of the vehicle 110, and the rubber material is below the overturning fulcrum. It is possible to work at a high place in a safe state in which stability is ensured as compared with the case where there is.

[Example 3]
Next, the jack apparatus 300 for an aerial work vehicle according to the present invention will be described with reference to FIGS. 6 (a) and 6 (b) are side views ((a) when stored and (b) when extended) of the jack device 300 for an aerial work vehicle according to the present invention, and FIGS. FIG. 7C is a perspective view (from (a) before rotating the rotating plate 336 and after (b) after rotating the rotating plate 336) of the jack device 330 of the jack device 300 of the aerial work vehicle of the present invention, and FIG. FIGS. 7A and 7B are perspective views from below of the jack pad 330, and FIG. 8 shows a state before and after the rotation of the rotating plate 336 of the jack pad 330 of the jack device 300 of the aerial work vehicle of the present invention. FIG. 9 is an operation explanatory view of the jack device 300 for an aerial work vehicle according to the present invention. In addition, about the component same as Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The aerial work vehicle jack device 300 includes a jack portion 120, a jack pad 330, and a connection portion 140. The jack part 120 and the connection part 140 have the same configuration as in the first embodiment. However, the structure of the jack pad 330 is different from that of the first embodiment. The jack pad 330 includes a base portion 331, a rotating plate 336 provided at a lower portion of the base portion 331, a rotation fixing pin 337, and a pin installation base 338 provided on the upper surface of the base portion 331. Yes.

  The rotating plate 336 is rotatable around a rotating shaft (not shown) extending downward from the lower surface of the central portion of the base portion 331. A hard plastic member 133 and a rubber member 132 are attached to the lower surface of the rotating plate 336 to form a ground plane structure S3. Further, the rotation fixing pin 337 is inserted into a pin installation base 338 provided on the upper surface of the base portion 331, and is inserted into a hole (not shown) provided in the base portion 331, so that the rotation plate 336 The rotation of the rotating plate 336 is restricted (locked) by being inserted into a provided hole (not shown).

  Here, since the rotating plate 336 is rotatable around the center portion of the base portion 331, the rotating fixing pin 337 is removed from the hole of the rotating plate 336, and the rotating plate 336 is shown in FIGS. Rotate 180 degrees. Further, when the rotating plate rotates 180 degrees in this way, the hard plastic member 133 and the rubber member 132 attached to the rotating plate also rotate together with the rotating plate 336. For this reason, the ground contact surface structure S3 has a structure in which the hard plastic member 133 is closer to the vehicle width center portion of the vehicle 110 and the rubber member 132 is the vehicle 110 of the vehicle 110 before the rotation. The hard plastic member 133 is disposed in a region far from the vehicle width center of the vehicle 110 and the rubber member 132 is disposed in the vehicle width center of the vehicle 110 after rotation. It is arranged in the region on the side close to the part.

  Further, as shown in FIG. 8, when the rotating plate 336 is rotated 180 degrees around the central portion of the base portion 331, the central portion of the rotating plate 336 is located almost directly below the jack pad connecting pin 143. It is configured as follows. Therefore, after the rotating plate 336 rotates, the jack pad 330 that is swingably connected to the inner jack 122 can be kept substantially horizontal. As a result, the grounding of the jack pad 330 to the road surface can be performed more smoothly, and when the jack is installed (when the inner jack 122 is extended to lift the vehicle 110), the grounding surface of the jack pad 330 is obtained. A load can be applied to substantially the center of the structure S3, and the entire ground plane structure S3 can be pushed.

  Next, with reference to FIG. 9, the operation (projecting operation) of the jack device 300 for an aerial work vehicle according to the present invention will be described. In the state of the jack apparatus 300 for an aerial work vehicle, the inner jack 122 and the connecting portion 140 are accommodated in the outer jack 121 before the overhanging operation is started, and the jack pad 330 is located outside the vehicle width of the vehicle 110. It does not protrude. From this state, the rotation fixing pin 337 is removed from the hole provided in the rotation plate 336, the lock of the rotation plate 336 is released, and the rotation plate 336 is rotated (FIG. 9A).

  Thereafter, when the rotating plate 336 is rotated 180 degrees, the rotation fixing pin 337 is inserted into the hole of the rotating plate 336 to lock the rotating plate 336. Then, the inner jack 122 is extended. At this time, since the central portion of the rotating plate 336 is almost directly below the jack pad connection pin 143, the jack pad 330 approaches the road surface while being maintained in a substantially horizontal state (FIG. 9B). If the inner jack 122 is continuously extended as it is, a part of the jack pad 330 swingably connected to the lower side of the inner jack 122 comes into contact with the road surface. As the inner jack 122 extends, the jack pad 330 maintained in a substantially horizontal state rotates slightly with the jack pad connection pin 143 as the rotation axis, and the entire grounding surface structure S3 of the jack pad 330 is on the road surface. Touch.

  Further, when the inner jack 122 is extended, the vehicle 110 starts to rise. At this time, the ground contact surface structure S3 receives a load at a substantially central portion and slides on the road surface toward the outside of the vehicle 110 in a state where the entire ground contact surface structure S3 is pushed (FIG. 9C). ). Thereafter, when the extension operation of the inner jack 122 is stopped, the ground contact surface structure S3 catches the road surface by the rubber member 132 and fixes the ground contact portion 330 on the road surface (FIG. 9D).

  Next, a method of using the jack device 300 for an aerial work vehicle according to the present invention that performs such an overhanging operation for an aerial work will be described. First, the vehicle 110 provided with the work facility is stopped at a work position where work at a high place is performed. Next, each rotation fixing pin 337 of each of the four jack pads 330 is removed from the hole of each rotation plate 336, each rotation plate 336 is rotated 180 degrees, and each rotation fixing pin 337 is inserted into the hole of each rotation plate 336. Regulate rotation. Next, the inner jacks 122 of the two jack portions 120 installed on the front wheel side of the vehicle 110 are extended, and then the inner jacks 122 of the two jack portions 120 installed on the rear wheel side of the vehicle 110 are extended. The vehicle 110 is levitated. At this time, as described above, the ground contact surface structure S3 slides on the road surface with the entire surface pressed.

  Next, to adjust the level of the vehicle 110, the extension of each inner jack 122 is finely adjusted. As a result, the vehicle 110 is in a state where it can work at a high place. In this state, the worker works at a high place. At this time, as described above, the jack pad 330 is fixed to the road surface by the rubber member 132 of the ground contact surface structure S3, the sliding movement of the vehicle 110 is prevented, and the work can be performed safely even on an inclined surface. Further, even if the load is applied to the jack pad 330 by operating the boom 116, the ground plane structure S3 includes the hard plastic member 133 that hardly deforms due to the load, so that the work can be safely performed in a stable state. Can be done. After the work in high places is completed, the inner jacks 122 of the two jack portions 120 installed on the rear wheel side of the vehicle 110 are accommodated, and then the two jack portions 120 installed on the front wheel side of the vehicle 110 are stored. Each inner jack 122 is accommodated and the vehicle 110 is landed.

  Next, each rotation fixing pin 337 is removed from the hole of each rotation plate 336, the lock is released, and each rotation plate 336 is rotated 180 degrees in the opposite direction. Next, each rotation fixing pin 337 is inserted into the hole of each rotation plate 336 and locked so that each jack pad 330 does not protrude beyond the width of the vehicle 110. Thereafter, the vehicle 110 is moved from the work position.

  As described above, the jack device 300 for an aerial work vehicle according to the present embodiment includes the rotating portion 336 that rotates around the center portion of the base portion 331, and when the rotating plate 336 rotates 180 degrees, The jack pad connecting pin 143 is configured so that its central portion is located almost directly below. Therefore, when the inner jack 122 is extended with the rotating plate 336 rotated 180 degrees, the jack pad 330 can be brought close to the road surface while being kept in a substantially horizontal state. Thereby, the grounding to the road surface of the entire grounding surface structure S3 of the jack pad 330 can be performed smoothly.

  Further, when the rotating plate 336 is rotated 180 degrees, the central portion of the rotating plate 336 is located almost directly below the jack pad connecting pin 143. Therefore, when the inner jack 122 is extended to lift the vehicle 110, the jack pad 330 The ground contact surface structure S3 receives a load at substantially the center thereof and slides on the road surface in the outward direction of the vehicle 110 in a state where the entire ground contact surface structure S3 is pushed. Thereby, the sliding of the ground-contact surface structure 3S when the inner jack 122 is extended to lift the vehicle 110 can be stably performed.

  Further, the rotating plate 336 can rotate 180 degrees toward the outside and the inside of the vehicle 110, and the rotation of the rotating plate 336 can be restricted using the rotation fixing pin 337. Therefore, when working at a high place, the rotating plate 336 is rotated 180 degrees toward the outside of the vehicle 110 and fixed. When the working at a high place is not performed, the rotating plate 336 is used inside the vehicle 110. The inner jack 122 is housed in the outer jack 121. As a result, when the work at a high place is not performed, the jack device can be accommodated within a specified vehicle width.

  In the above, the structure and operation | movement of the jack apparatus 100, 200, 300 of the aerial work vehicle which is Example 1-Example 3 of this invention were demonstrated. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical idea of the present invention.

DESCRIPTION OF SYMBOLS 100 Jack apparatus of high-altitude work vehicle 110 Vehicle 111 Truck cabin 112 Truck chassis frame 113 Wheel 114 Subframe 115 Swivel stand 116 Boom 117 Work stand 120 Jack part 121 Outer jack 122 Inner jack 130 Jack pad 131 Base part 132 Rubber member 133 Rigid plastic member 134 Bolt hole 135 Bolt S1-1 Grounding surface structure 140 Connecting portion 141 Upper connecting member 142 Lower connecting member 143 Jack pad connecting pin

Claims (5)

Provided on both left and right sides of a vehicle equipped with a work facility; a jack portion extending downward and obliquely outward of the vehicle; a grounding portion provided below the jack portion and in contact with a road surface; and the grounding portion A jack device for an aerial work vehicle, comprising: a connecting portion that swingably connects to a jack portion; and extending the jack portion to ground the grounding portion to support the vehicle in a lifted state. ,
The grounding portion has a grounding surface structure having a hard member having a small sliding resistance with the road surface and an elastic member having a sliding resistance with the road surface larger than the hard member,
The ground contact surface structure slides on the road surface toward the outside of the vehicle during the extension operation of the jack portion, and when the jack portion stops the extension operation, the elastic member portion causes the road surface to be A jack device for an aerial work vehicle characterized by capturing and fixing the grounding portion on the road surface.   The ground contact surface structure includes a region of the hard member and the elastic member on the side where the hard member is far from the vehicle width center portion of the vehicle, and a region on the side where the elastic member is near the vehicle width center portion of the vehicle. The jack device for an aerial work vehicle according to claim 1, wherein the jack device is disposed respectively.   The ground contact surface structure is such that, of the hard member and the elastic member, the elastic member is disposed in a region near the center of the ground contact surface structure, and the hard member is disposed in a peripheral region thereof. The jack apparatus for an aerial work vehicle according to claim 1,   4. The jack according to claim 1, wherein the jack portion is connected to the grounding portion via the connection portion at a position farther from the vehicle width central portion of the vehicle than the center of the grounding portion. A jack device for an aerial work vehicle according to claim 1. The connecting portion is
A first connecting member connected to the jack portion;
A second connecting member connected to the grounding portion;
A shaft member that penetrates the first and second connecting members and serves as a rotation shaft when the grounding portion swings;
The grounding part is
A base portion connected to the second connecting member;
A rotating part that is provided at a lower part of the base part, rotates 180 degrees around a central part of the base part, and has the ground contact surface structure at a lower part thereof;
A lock mechanism for locking and unlocking the base part and the rotating part,
5. The jack apparatus for an aerial work vehicle according to claim 4, wherein a central portion of the rotating portion is positioned almost directly below the shaft member after being rotated 180 degrees.

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