JP2011016664A - Lifter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lifter device to be loaded or unloaded to or from a truck load-carrying platform with its own power without the usage of a crane.SOLUTION: In the lifter device having a jack 2 respectively in the vicinity of four corners of a lifting frame 1 having a rectangular plane shape, the jacks 2 are attached movably between a storage position stored in the lifting frame 1 side and a protrusion position protruded to a side from the lifting frame 1, and a grounding leg 4 is respectively attached in the vicinity of the four corners of the lifting frame 1 so as to be downward protruded from the lifting frame 1 and grounded on the truck load-carrying platform, and thereby, the grounding legs 4 and the jacks 2 cooperate when the lifter device is loaded or unloaded to or from a transferring truck, and thus, it is possible to load or unload the lifter device by its own power without the usage of the crane.

Description

  The present invention relates to a lifter device that uses a heavy object as a work object and is used for lift work of the work object.

  In recent years, cranes tend to be large, but such large cranes are legally restricted from traveling on public roads as they are.

  For this reason, when moving such a large crane vehicle between work sites, disassemble the crane vehicle, remove the boom or swivel from the crane carrier, and transfer them individually using a trailer truck or the like. At the transfer destination, these are assembled into a large crane vehicle to perform the required crane work.

  By the way, in such a large crane vehicle, since the boom or swivel provided for it is large and heavy, these disassembly and assembly operations are not easy, and for the purpose of easily performing such operations, For example, a lifter device as shown in Patent Document 1 has been proposed.

The lifter device disclosed in Patent Document 1 is provided with telescopic cylinders attached to both ends of a beam member having a predetermined length in a direction orthogonal to the beam members, and telescopic support legs extending downward from the distal end of the telescopic cylinder. (Corresponding to the jack of the present application) is attached, and the beam member is supported by the support legs so as to be movable up and down.

By the way, this type of lifter device is transported by truck to the assembly site of a large crane vehicle, installed on the ground of the assembly site, and used for assembling (and dismantling) the boom and swivel. In the assembly site, they are loaded and unloaded onto a transfer truck.

JP-A-7-267574

However, the above-described lifter device does not have a function of loading and unloading the lifter device on the transfer truck at the assembly site, so that a crane (crane car) for loading and unloading the lifter device is not provided. It was necessary to prepare at the assembly site.

Therefore, the present invention was made mainly to provide a lifter device that can be loaded and unloaded on a transfer truck by itself without using a crane for loading and unloading the lifter device at the assembly site. .

  In the present invention, the following configuration is adopted as a specific means for solving such a problem.

[Invention of Claim 1 of the Present Application]
The invention of claim 1 of the present application relates to a lifter device comprising jacks 2 in the vicinity of the four corners of an elevating frame 1 having a substantially rectangular planar shape. Each jack 2 has a storage position stored on the elevating frame 1 side. The grounding legs 4 are mounted so as to be movable between the jumping positions jumped to the side from the lifting frame 1, and projecting downward from the lifting frame 1 in the vicinity of the four corners of the lifting frame 1 to be grounded on the truck bed. It is characterized by being installed.

The lifter device of claim 1 is premised on that it can be transferred using a normal truck, and therefore the width of the lifting frame 1 is set to a size that does not protrude from the left and right sides of the loading platform width of the transfer truck.

Each jack 2 is positioned within the width of the lifting frame 1 when in the retracted position, and jumps out of the width of the lifting frame 1 when in the protruding position. In the state where each jack 2 is in the jumping position, the interval between the pair of jacks 2 positioned in the width direction of the lifting frame 1 is wider than the loading platform width of the transfer truck.

Each of the grounding legs 4 (there are four) can support the lifting frame 1 (including each jack 2) by grounding on the upper surface of the truck bed when the lifter device is loaded on the truck bed. .

In the lifter device according to the first aspect, when the jacks 2 are loaded on the truck bed with the respective jacks being in the retracted positions, the respective grounding legs 4 come into contact with the upper surface of the truck bed and the entire lifter device is placed on the truck bed. I can support it. In addition, when the lifter device is placed on the truck bed, each grounding leg 4 contacts the upper surface of the truck bed, and each jack 2 can be lifted from the upper surface of the truck bed, and each jack 2 is stored in the floating state. It can be moved between the position and the jumping position.

And to lower the lifter device on the truck bed to the ground, move each jack to the jumping position with the entire lifter device supported by each grounding leg (each jack moves to a position straddling the truck bed), Next, after each jack 2 is actuated and the lower end of the jack is grounded, the lifting frame is moved up until the lower end of each grounding leg 4 is lifted from the upper surface of the truck bed, so that the truck is withdrawn from directly below the lifter device. be able to. In addition, when the truck is withdrawn from directly under the lifter device, the work object is carried directly under the lifter device (elevating frame), and the operation of each jack is performed with the work object supported by the elevating frame of the lifter device. Can be moved up and down.

In addition, in order to load the lifter device grounded on the ground onto the truck bed, the above-described loading and unloading operations may be performed in the reverse order.

As described above, the lifter device according to the first aspect of the present invention can load and unload the transfer truck by itself.

[Invention of claim 2 of the present application]
The invention of claim 2 of the present application is characterized in that, in the lifter device of claim 1 of the present invention, each ground leg 4 is provided at a position closer to the inside than each jack 2 in the retracted position.

If each grounding leg 4 is provided at a position closer to the inner side than each jack 2 in the retracted position as in claim 2, each jack 2 interferes with each grounding leg 4 even when each jack 2 is retracted. There is nothing.

[Invention of claim 3 of the present application]
The invention of claim 3 of the present application is characterized in that, in the lifter device of the invention of claim 1 or 2, each grounding leg 4 is provided in a posture to be inclined downward in the width direction of the lifting frame 1.

If each grounding leg 4 is provided in such a posture as to descend downward in the width direction of the lifting frame 1 as in claim 3, when each grounding leg 4 is grounded, the grounding leg 4 extends in the width direction of the lifting frame 1. The space | interval part space | interval of a pair of located grounding leg 4 becomes wide.

[Invention of claim 4 of the present application]
The invention according to claim 4 of the present application is the lifter device according to any one of claims 1 to 3, wherein each grounding leg 4 is attached so that the amount of protrusion from the lifting frame 1 to the lower side can be adjusted. It is characterized by.

If the downward protrusion amount of each grounding leg 4 is attached so as to be adjustable as in the fourth aspect, the support height of the lifting frame 1 by the grounding leg 4 can be adjusted.

The lifter device of each invention of the present application has the following effects.

[Effect of the invention of claim 1 of the present application]
The lifter device according to the first aspect of the present invention is configured such that each jack 2 in the vicinity of the four corners of the elevating frame 1 has a storage position stored on the elevating frame 1 side and a jumping position where the jack 2 is ejected laterally from the elevating frame 1. The grounding legs 4 that protrude downward from the lifting frame 1 and are grounded on the truck bed are mounted near the four corners of the lifting frame 1 so that the lifter device is loaded on the transfer truck. -When loading / unloading, the grounding leg 4 and the jack 2 can cooperate with each other by itself, and there is an effect that a crane for loading and unloading the lifter device becomes unnecessary.

[Effect of the invention of claim 2 of the present application]
The invention of claim 2 of the present application is the lifter device of the invention of claim 1 above, wherein each grounding leg 4 is provided at a position closer to the inner side than each jack 2 in the retracted position. Even if each jack 2 is stored, there is an effect that each jack 2 does not interfere with each grounding leg 4.

[Effect of the invention of claim 3 of the present application]
According to the invention of claim 3 of the present application, in the lifter device of the invention of claim 1 or 2, each grounding leg 4 is provided in such a posture as to descend downward in the width direction of the elevating frame 1. When grounded, the distance between the grounding portions of the pair of grounding legs 4 positioned in the width direction of the elevating frame 1 is widened.

Therefore, in addition to the effect of the first or second aspect, the lifter apparatus according to the third aspect of the invention has the effect that the support state of the lifter apparatus by the respective grounding legs 4 is stabilized.

[Effect of the invention of claim 4 of the present application]
The invention according to claim 4 of the present application is the lifter device according to any one of claims 1 to 3, wherein each grounding leg 4 is attached so that the amount of protrusion downward from the lifting frame 1 can be adjusted. In addition to the effects of the first to third aspects, the support height of the elevating frame 1 by the grounding leg 4 can be adjusted, and when the grounding leg 4 is not required, it is held at the upper storage position (a position that does not interfere). There is an effect that can be.

1 is a plan view of a lifter device according to a first embodiment of the present invention. It is an II-II arrow line view of FIG. It is the III-III arrow line view of FIG. It is an enlarged view of the IV section of FIG. It is an enlarged view of the V section of FIG. It is VI-VI arrow line view of FIG. FIG. 7 is an enlarged view of VII-VII in FIG. 2. FIG. 8 is an enlarged view of VIII-VIII in FIG. 3. It is a top view of the lifter apparatus which concerns on 2nd Embodiment of this invention. It is a XX arrow line view of FIG. FIG. 10 is a view taken along arrow XI-XI in FIG. 9. It is an enlarged view of the XII part of FIG. It is an enlarged view of the XIII part of FIG. It is explanatory drawing of the transfer state of the lifter apparatus by a truck. It is 1st operation | movement procedure explanatory drawing in the case of taking down a lifter apparatus from a truck. It is 2nd operation | movement procedure explanatory drawing. It is 3rd operation | movement procedure explanatory drawing. It is 1st work procedure explanatory drawing in the case of removing a boom from a crane vehicle using a lifter apparatus, and mounting in a 1st trailer truck. It is 2nd operation | movement procedure explanatory drawing. It is 3rd operation | movement procedure explanatory drawing. It is 4th operation | movement procedure explanatory drawing. It is 5th operation | movement procedure explanatory drawing. It is 6th operation | movement procedure explanatory drawing. It is 1st operation | movement procedure explanatory drawing in the case of using a lifter apparatus and removing a swivel base from a crane vehicle, and mounting in a 2nd trailer truck. It is 2nd operation | movement procedure explanatory drawing. It is 3rd operation | movement procedure explanatory drawing. It is 4th operation | movement procedure explanatory drawing. It is 1st work procedure explanatory drawing in the case of mounting a lifter apparatus in the 1st trailer truck which mounted the boom. It is 2nd operation | movement procedure explanatory drawing. It is 3rd operation | movement procedure explanatory drawing. It is 4th operation | movement procedure explanatory drawing.

  Hereinafter, the present invention will be specifically described based on preferred embodiments.

I: First Embodiment FIGS. 1 to 3 show a lifter device Z according to a first embodiment of the present invention. This lifter device Z is used, for example, when disassembling and transporting a large crane vehicle, and includes a lifting frame 1, a jack 2, a grounding leg 4 and a suspension device 5 described below. The

  The elevating frame 1 includes a pair of first girder members 11 and 11 arranged in parallel at a predetermined interval, and a pair of second girder members arranged in parallel at a predetermined interval on both ends of each first girder member 11 and 11. It has materials 12, 12, and 12, 12, and has a long rectangular planar shape as a whole. As will be described later, it is assumed that the lifter device Z can be transported using a normal track. For this reason, the dimension in the minor axis direction (that is, the width dimension) of the lifting frame 1 is the same as that for the track. Loading is set within the allowable dimensions.

  A jack 2 and a grounding leg 4 which will be described later are arranged in the vicinity of the four corners of the lifting frame 1, and a suspension device 5 which will be described later is arranged at both ends in the long axis direction.

"Jack 2 configuration"
The jack 2 raises and lowers the lifting frame 1. The work object suspended by the suspension device 5 through the lifting and lowering of the lifting frame 1, i.e., the crane vehicle X in this embodiment. The boom B and the swivel base S are lifted and hung.

  The jack 2 has a two-stage expansion / contraction structure with a built-in expansion / contraction hydraulic cylinder, and has a base cylinder 21 connected to the lifting frame 1 side via a swing arm 3 to be described later, and the base cylinder 21. An intermediate cylinder 22 inserted into the intermediate cylinder 22 and a tip cylinder 23 inserted in the intermediate cylinder 22 and provided with a grounding plate 26 (see FIGS. 4 and 7) at the tip thereof.

  Here, the connection structure with respect to the said raising / lowering frame 1 of the said jack 2 is demonstrated.

  The jack 2 is connected to the elevating frame 1 via the swing arm 3 as described above. In the connected state via the swing arm 3, the jack 2 itself is positioned. In addition to being able to change, the arrangement position in the plane direction with respect to the lifting frame 1 can be changed, and by the cooperation of the posture changing function and the position changing function, the lifted device Z can be made compact and lifted. It is compatible with securing of work ability at the time of work.

  As shown in FIG. 4 and FIG. 7, the change in the posture of the jack 2 includes a “falling posture” that is lying down along the lifting frame 1 on the upper surface side of the lifting frame 1, and a chain line in FIGS. 2 and 3. As shown in the figure, it is a change between two postures of “standing posture” standing in a substantially vertical direction.

  Further, the position change of the jack 2 is a change between two positions of “storage position” and “ejecting position”. That is, the “storage position” is a state in which the jack 2 set in the “falling posture” is positioned within the width dimension of the lifting frame 1 as shown by solid lines in FIGS. 1 and 3. . In addition, the “jumping position” is a state in which the jack 2 set in the “standing position” has jumped in the short axis direction of the lifting frame 1, as shown by a chain line in FIGS. 1 to 3. . As will be described later, in a state where all the jacks 2 are set at the “jumping position”, a crane truck and a trailer truck are placed between a pair of jacks 2 and 2 facing in the short axis direction of the lifting frame 1. Space to allow entry is secured.

  Hereinafter, the connection structure of the jack 2 to the lifting frame 1 will be described in detail.

  As shown in FIGS. 4, 7, and 8, the swing arm 3 is configured by a beam body having a predetermined length, and one end 3 a thereof is directed in a substantially vertical direction in the vicinity of the corner of the elevating frame 1. The other end 3b is spaced apart in the vertical direction and is paired with a pair of pin holes 35, 36 ( A bracket 31 having a structure (see FIG. 7) is attached. The swing arm 3 is rotated by a swing cylinder 34 arranged between the lift frame 1 and the lift frame 1.

  A base end portion 21a (see FIG. 7) of the base tube 21 of the jack 2 is provided with a pair of pin holes 27 and 28 so as to correspond to the pair of pin holes 35 and 36 on the swing arm 3 side. A bracket 24 is provided. The jack 2 overlaps the pin hole 27 of the bracket 24 and the pin hole 35 on the swing arm 3 side, and inserts the connecting pin 32 therein, so that the jack 2 is substantially vertically centered. It can be rotated in the plane. The jack 2 is rotated around the connecting pin 32 by a raising / lowering cylinder 25 disposed between the jack 2 and the swing arm 3.

  When the raising / lowering cylinder 25 is fully contracted, the jack 2 is substantially connected to the upper surface of the elevating frame 1 while being connected to the swing arm 3 side by the connecting pin 32 as shown in FIG. It is laid down so that it may become parallel. The posture at this time is the above-mentioned “falling posture”. Then, the jack 2 set in the “falling posture” is gradually raised around the connecting pin 32 as the raising cylinder 25 extends, and as shown by a chain line in FIG. When the raising / lowering cylinder 25 is fully extended, the cylinder 25 is raised substantially vertically. The posture at this time is the “standing posture”. Here, the jack 2 is fixed in the “standing posture” by fitting the connecting pin 33 into the pin hole 36 on the bracket 31 side and the pin hole 28 on the bracket 24 side.

  Therefore, with the raising / lowering cylinder 25 fully extended and the jack 2 set to the “standing position”, the swinging cylinder 34 is fully contracted to set the jack 2 to the “retracted position”. After that, the raising cylinder 25 is fully contracted and the jack 2 is set to the “falling posture”, so that the jack 2 is set to the “falling posture” at the “retracted position”, and the transfer by the truck is performed. Possible forms.

  On the other hand, when the raising / lowering cylinder 25 is fully extended and the jack 2 is set to the “standing position”, the swinging cylinder 34 is fully extended, so that the jack 2 is in the “ejecting position”. The posture is set to “standing posture”, and the lift work can be performed.

“Configuration of grounding leg 4”
When the lifter device Z is transported by truck, the grounding leg 4 supports the lifter device Z on a truck bed so that the lifter device Z can be held by itself without using a crane device. In particular, the lifting / lowering function of the jack 2 enables loading / unloading to / from a truck and also enables stable support of the lifter device Z during transfer. In this embodiment, As shown in FIG. 1, the front and rear ends of the lift frame 1 are provided at positions closer to the inside than the pair of jacks 2, 2 facing the width direction of the lift frame 1.

  As shown in FIGS. 7 and 8, the grounding leg 4 is composed of a cylindrical body having a predetermined length, and can be slidably displaced in a guide cylinder 41 fixed to the lifting frame 1 side. A ground plate 42 is provided at the lower end of the ground plate. In this case, the guide cylinder 41 is attached in an inclined state so as to be gradually displaced outward in the width direction of the elevating frame 1 as it goes downward. Therefore, the grounding leg 4 moves the grounding position of the grounding plate 42 outward in the width direction of the lifting frame 1 as the amount of downward projection from the lifting frame 1 increases, as shown in FIG. Thus, when the pair of grounding legs 4, 4 facing the width direction of the lifting frame 1 are grounded, the pair of grounding legs 4, 4 are installed in an “eight” shape with the lower end side enlarged and stable. A grounding state is secured.

  The grounding leg 4 is adapted to manually adjust the downward protrusion amount, and the position fixing after the adjustment of the protrusion amount is provided in the guide cylinder 41 as shown in FIG. This is done by inserting the pin 43 into a selected one of the pin hole 45 and the plurality of pin holes 44 provided on the grounding leg 4 side.

"Configuration of the suspension device 5"
The suspension device 5 suspends and supports a work object (in this embodiment, a boom and a swivel of a crane truck). In the lifter device Z of this embodiment, since the lifting work of the work object is basically performed by the expansion and contraction operation of the jack 2, the suspension device 5 is basically adjusted in its suspension position. Although it is not necessary to have a function, in practice, it is difficult to position the work object at an appropriate position with respect to the lifter device Z. Therefore, the installation position of the suspension device 5 with respect to the lifting frame 1 is determined. The elevating frame 1 is configured to be finely adjusted in the width direction. This will be specifically described below.

  As shown in FIG. 1, the suspension device 5 is attached between a pair of second girder members 12 and 12 disposed at both ends in the major axis direction of the elevating frame 1. Specifically, as shown in enlarged views in FIGS. 5 and 6, the slide body 52 is placed in the length direction of the second girder member 12 in the guide tube 51 provided between the second girder members 12 and 12 ( That is, it is fitted so as to be slidably displaceable in the width direction of the elevating frame 1, and a hydraulic cylinder 53 is attached to the slide body 52 in the vertical direction. The suspension beam 54 provided with a suspension tool 56 having a predetermined length is attached to the balance so that its length direction substantially coincides with the width direction of the lifting frame 1.

  Further, a pair of left and right slide cylinders 55 and 55 are coupled to the hydraulic cylinder 53 in a state of being aligned with the sliding direction of the slide body 52, and the pair of left and right slides. When the cylinders 55 and 55 are extended and contracted in synchronization, the slide body 52 is slid and displaced, and the position adjustment of the pair of suspension members 56 and 56 attached to the suspension beam 54 is performed in the left-right direction. As will be described later, the push-up cylinder 53 applies, for example, a required tension to the boom when the boom is disassembled, and enables the disassembly work line, and after disassembly, the boom is suspended. In addition to this, it can also be used as vertical position adjusting means for the above-mentioned hanging tool 56.

  In addition, the position adjustment in the left-right direction of the hanger 56 by the slide cylinder 55 and the position adjustment in the vertical direction of the hanger 56 by the hydraulic cylinder 53 are independently performed between the pair of suspension devices 5, 5. It can be done. Thus, for example, in one work object, the height is different between the portion corresponding to one suspension device 5 and the portion corresponding to the other suspension device 5 or because of the shape. Even when the lowered position differs in the plane direction, the work object can be suspended and supported in an appropriate state without any trouble.

  Moreover, in each figure, the code | symbol F has shown the loading platform surface of the truck or the trailer truck, and the code | symbol G has shown the ground.

II: Second Embodiment FIGS. 9 to 11 show a lifter device Z according to a second embodiment of the present invention. The lifter device Z has the same basic configuration as the lifter device Z according to the first embodiment, and is different from the lifter device Z in the jumping structure of the jack 2. Hereinafter, a specific structure will be described with a focus on this difference, and the same reference numerals as those in FIGS. 1 to 8 according to the first embodiment are used for the other common components in the second embodiment. It attaches to FIGS. 9-13 which concern on a form, supposes that the corresponding description in this 1st Embodiment is used, and abbreviate | omits description here.

  As shown in FIGS. 9 to 13, in the lifter device Z of this embodiment, jacks 2 are arranged in the vicinity of the four corners of the elevating frame 1, and each jack 2 is set in a “falling posture” and a “standing posture”. The position can be changed between “storage position” and “ejecting position”, and the configuration itself is the same as in the case of the first embodiment.

However, in the first embodiment, the position of the jack 2 is changed between the “retracted position” and the “ejecting position” by the swing of the swing arm 3, whereas the second embodiment In the embodiment, the position of the jack 2 can be changed between the “retracted position” and the “ejected position” by the expansion and contraction of the telescopic cylinder 6 arranged in the width direction of the lifting frame 1. In the jumping structure, both are greatly different.

  The telescopic cylinder 6 includes an outer cylinder 61 fixedly arranged on the elevating frame 1 side and an inner cylinder 62 slidably fitted in the outer cylinder 61, and is expanded and contracted by a built-in hydraulic cylinder (not shown). Is done. A rotating body 65 is rotatably connected to the tip of the inner cylinder 62 of the telescopic cylinder 6 by a rotation center shaft 63 arranged in the vertical direction.

  The rotating body 65 is rotated around the rotation center axis 63 by a rotating cylinder 64 disposed between the rotating body 65 and the inner cylinder 62. The rotating body 65 is provided with a pair of pin holes 66 and 67 spaced apart in the vertical direction. The jack 2 overlaps the pin hole 27 of the bracket 24 and the pin hole 66 on the rotating body 65 side and inserts the connecting pin 32 therein, so that the substantially vertical surface is centered on the connecting pin 32. It is possible to rotate within. The jack 2 is rotated around the connecting pin 32 by a raising / lowering cylinder 25 disposed between the jack 2 and the rotating body 65.

  In the state where the raising / lowering cylinder 25 is fully contracted, the jack 2 is laid down so as to be substantially parallel to the upper surface of the elevating frame 1 while being connected to the rotating body 65 by the connecting pin 32. It is set to the above “falling posture”. Then, as the raising / lowering cylinder 25 is extended, the raising / lowering cylinder 25 is gradually lifted around the connecting pin 32, and the raising / lowering cylinder 25 is raised substantially vertically when the raising / lowering cylinder 25 is fully extended. Here, by inserting the connecting pin 33 into the pin hole 67 on the rotating body 65 side and the pin hole 28 on the bracket 24 side, the posture is fixed and set to the “standing posture”.

  Accordingly, while the raising and lowering cylinder 25 is fully extended and the jack 2 is set in the “standing position”, the telescopic cylinder 6 is fully contracted to draw the jack 2 toward the lifting frame 1 and The rotating cylinder 64 is fully extended to move the jack 2 from the front end side of the inner cylinder 62 of the telescopic cylinder 6 to the side, and the raising / lowering cylinder 25 is fully contracted so that the jack 2 is “inclined”. By setting the “posture”, the jack 2 is set to the “falling posture” at the “retracted position” and is formed into a shape at the time of transfer. Further, in the state where the telescopic cylinder 6 is fully extended and the jack 2 is set in the “standing posture”, the rotating cylinder 64 is fully contracted and the telescopic cylinder 6 is fully extended, whereby the jack 2 Is set to the “standing position” at the “ejecting position” and is in the form of lifting work.

  In this embodiment, the jack 2 is connected to the inner cylinder 62 of the telescopic cylinder 6 via the rotating body 65. However, in another embodiment of the present invention, the jack 2 is connected to the rotating cylinder 65. It is also possible to directly connect to the inner cylinder 62 of the telescopic cylinder 6 without using the moving body 65. In the case of such a configuration, the structure can be simplified and the operation procedure can be simplified to the extent that the rotating body 65 is unnecessary.

III: Example of Use of Lifter Device Z Next, with reference to FIGS. 14 to 31, when the large crane vehicle X is disassembled and transferred using the lifter device Z according to the first embodiment. The work procedure will be described.

  Here, the lifter device Z is transported to the work site by a truck, and the lifter device Z is lowered from the truck and installed at the work site, and the boom and swivel of the crane truck are installed using the installed lifter device Z. Each of the booms and the swivel base is individually placed on a trailer track, and the lifter device Z is placed on the trailer track on which the boom is placed, together with the boom. A case where the boom, the swivel base and the lifter device Z are transferred will be described as an example.

  FIG. 14 shows a state where the lifter device Z is placed on the truck T1 and transferred to the work site. In this transfer state, the lifter device Z sets each jack 2 in the “falling posture” and positions it in the “storage position”. Then, the grounding legs 4 are protruded downward to a predetermined length, and the lifter device Z is placed on the loading platform of the track T1 by the grounding legs 4.

  In this form at the time of transfer, since the jack 2 of the lifter device Z is set to the “falling posture” and is placed on the track by the grounding leg 4, for example, the jack 2 is placed in the “standing posture”. The overall height from the ground is kept low compared to the case where the vehicle is placed on the track by the jack 2. Therefore, for example, the lifter device Z can be transported using a normal truck with a relatively high floor but a low fare without using a low-floor trailer truck, and the degree of freedom of transport is improved. At the same time, the transfer cost can be reduced.

  Next, the lifter device Z is lowered from the track T1 and installed on the ground. In that case, first, as shown in FIGS. The position of each jack 2 is changed from the “falling position” to the “standing position” and fixed. Further, as shown in FIGS. 16 (a) and 16 (b), the respective jacks 2 set in the “standing position” are caused to jump out from the “storage position” to the side by the swing cylinder 34. Set to “Jump position”. In this state, each of the jacks 2 is in a position that protrudes further outward than the full width position of the track T1.

Next, as shown in FIGS. 17 (a) and 17 (b), the jacks 2 are extended from the fully contracted state to bring the grounding plate 26 into contact with the ground, and the lifter device Z is lifted from the loading platform of the truck T1. In addition, the jack 2 is fully extended to raise the lifting frame 1 side to the highest position. Each of the grounding legs 4 is pulled up and stored. Further, the track T1 is retracted from the lower position of the lifter device Z. Thus, the installation work of the lifter device Z is completed.

  The above is the operation procedure when the lifter device Z according to the first embodiment is lowered from the track T1 and installed on the ground. Instead, the lifter according to the second embodiment is used. The work procedure in the case where the device Z is lowered from the track T1 and installed on the ground will be briefly described as follows.

  That is, in the shape of the lifter device Z when it is transported, the jack 2 is in the “falling posture” at the “retracted position” as shown in FIGS. 9 to 11. First, with the raising / lowering cylinder 25, the jacks 2 in the “falling posture” are changed in posture to the “standing posture” on the side of the distal end of the inner tube 62 of the telescopic tube 6 and fixed. Further, the jack 2 is rotated from the front end side of the inner cylinder 62 of the telescopic cylinder 6 to the front front side by the rotation cylinder 64. Thereafter, the telescopic cylinder 6 is extended from the fully contracted state to the fully extended position, and the jack 2 is set to the “ejecting position”. In this state, each of the jacks 2 is in a position that protrudes further outward than the full width position of the track T1.

  After that, as in the case of the lifter device Z according to the first embodiment, the jacks 2 are extended from the fully contracted state so that the grounding plate 26 is grounded, and the lifter device Z is connected to the track T1. While lifting from the loading platform, the jack 2 is further fully extended to raise the lifting frame 1 side to the highest position. Each of the grounding legs 4 is pulled up and stored. Further, the truck T1 is retracted from the lower position by the lifter device Z. Thus, the installation work of the lifter device Z according to the second embodiment is completed.

  Since the work procedure after the installation is completed is the same in both the lifter device Z of the first embodiment and the lifter device Z of the second embodiment, the lifter device of the first embodiment will be described below. Only the case of using Z will be described.

  Next, the operation moves to disassembling the crane vehicle X and placing it on the trailer truck.

  In the crane vehicle X, a swivel base S is mounted on a crane carrier C, and a boom B is connected to the swivel base S. The boom B and the swivel base S are removed from the crane carrier C. These are transported by a trailer truck separate from the crane carrier C.

  As shown in FIG. 18, after the truck T <b> 1 is retracted, the crane vehicle X is moved under the lifter device Z and stopped at a predetermined position. In this case, in order to first remove the boom B from the crane carrier C side, the position of the center of gravity of the boom B is positioned substantially at the center of the suspension devices 5 and 5 before and after the lifter device Z. Stop.

  Thereafter, the jacks 2 are appropriately reduced to lower the lifting frame 1 portion, and the hanging tools 56 provided on the hanging devices 5 are connected to the hanging positions of the booms B. At this time, fine adjustment of the position is performed by the hydraulic cylinder 53 and the slide cylinder 55 so that the hanging tool 56 corresponds to a predetermined hanging position on the boom B side.

  After the suspension 56 is connected to the suspension position of the boom B, the hydraulic cylinder 53 or the jack 2 is slightly extended to apply a predetermined tension to the suspension 56. In this state, the boom B Detachment work from crane vehicle X is performed.

  When the separation work is completed, as shown in FIG. 19, the jacks 2 are extended to raise the boom B together with the lifting frame 1 and hold it, and the boom B is removed as shown in FIG. The crane car X in the state of being lifted is retracted from the lower side of the lifter device Z.

  Next, as shown in FIGS. 21A and 21B, instead of the crane vehicle X, the first trailer truck T2 enters the lower side of the lifter device Z and stops at a predetermined position. Thereafter, as shown in FIGS. 22 (a) and 22 (b), each jack 2 is contracted to lower the boom B together with the lifting frame 1, and this is placed on the loading platform of the first trailer truck T2. Place. When the mounting of the boom B on the first trailer track T2 is completed, as shown in FIG. 23, the jacks 2 are extended to raise the lifting frame 1 portion to the highest position and wait. The first trailer track T2 on which the boom B is placed is temporarily retracted from the lower side of the lifter device Z.

  Next, as shown in FIG. 24, instead of the first trailer truck T2, the crane vehicle X is again entered below the lifter device Z and stopped at a predetermined position.

  Thereafter, the jacks 2 are appropriately reduced to lower the lifting frame 1 portion, and the suspension tools 56 provided on the suspension devices 5 are connected to the suspension position of the swivel base. At this time, fine adjustment of the position is performed by the hydraulic cylinder 53 and the slide cylinder 55 so that the hanging tool 56 corresponds to a predetermined hanging position on the swivel base S side.

  After the suspension 56 is connected to the suspension position of the swivel base S, the hydraulic cylinder 53 or the jack 2 is slightly extended to apply a predetermined tension to the suspension 56. In this state, the swivel base S Is detached from the crane carrier C. After completion of the separation work of the swivel base S, the jacks 2 are extended to hold the swivel base S in an integrated manner with the lifting frame 1 and to hold the crane carrier C of the lifter device Z. Retract from the bottom.

  Next, as shown in FIG. 25, after the second trailer track T3 has entered the lower side of the swivel base S suspended by the lifter device Z, the jacks 2 are contracted to turn the swivel. The platform S is lowered and placed on the second trailer track T3. Thereafter, as shown in FIG. 26, each jack 2 is extended to raise and hold the lifting frame 1 portion to the highest position, and the swivel base S is placed as shown in FIG. The second trailer track T3 is retracted from the lower side of the lifter device Z.

  Next, the preparation for transferring the lifter device Z is started.

  That is, instead of retracting the second trailer track T3, as shown in FIG. 28, the first trailer track T2 on which the boom B is placed is re-entered below the lifter device Z. Stop.

  Then, the grounding legs 4 of the lifter device Z are fixed by projecting to a projecting amount that can be installed on the second trailer track T3. Thereafter, as shown in FIGS. 29 (a) and 29 (b), the jacks 2 are reduced to lower the lifting frame 1 and the grounding legs 4 are grounded on the first trailer track T2. The lifter device Z is supported by the grounding legs 4 in a state where the lifting frame 1 is positioned immediately above the boom B.

  Next, as shown in FIG. 30, each jack 2 is contracted and the position thereof is changed from the “ejecting position” to the “storing position”. Further, as shown in FIG. 31, the posture of each jack 2 is changed from the “standing posture” to the “falling posture”.

  Thus, both the boom B and the lifter device Z are placed on the first trailer track T2, and both of them are transferred by the first trailer track T2.

  With the above, the disassembly and transfer work of the crane vehicle X performed using the lifter device Z is completed.

  In the above description, after the work is completed, the lifter device Z is transported by the first trailer track T2 in a mixed state with the boom B. However, in other embodiments, for example, the lifter after the work is completed. The device Z can also be transported by the track T1 alone. In this case, the loading of the lifter device Z onto the truck T1 can be realized by reversing the work procedure (see FIGS. 14 to 17) in the installation work of the lifter device Z at the work site, The description here is omitted.

  In addition, here, as an example, the disassembly work of the crane vehicle X using the lifter device Z and the work of loading the disassembled boom B and swivel base S onto the trailer truck have been described, but the lifter device Z is used as the crane vehicle. Needless to say, the present invention is not only applicable to work using X as a work object, but can be widely applied to lift work for general heavy objects.

1 .. Lifting frame 2 .. Jack 3 .. Swing arm 4 .. Grounding leg 5 .. Suspension device 6 .. Telescopic cylinder 11 .. First girder material 12 .. Second girder material 21. 22 ·· Intermediate tube 23 ·· End tube 24 ·· Bracket 25 ·· Tilting cylinder 26 ·· Grounding plate 27 ·· Pin hole 28 ·· Pin hole 30 ·· Oscillation center shaft 31 ·· Bracket 32 ·· Connecting pin 33 .. Connecting pin 34 .. Oscillating cylinder 35 .. Pin hole 36 .. Pin hole 41 .. Guide tube 42 .. Ground plate 43 .. Pin 51 .. Guide tube 52 .. Slide body 53. Hydraulic cylinder 54 ·· Hanging beam 55 ·· Cylinder for sliding 56 ·· Hanging tool 61 ·· Outer tube 62 ·· Inner tube 63 ·· Rotating center shaft 64 ·· Rotating cylinder 65 ·· Rotating body 66 ·· Pin Hole 67 .. Pin hole · Boom S · swivel base C · crane carrier T1 · track T2 ... first trailer track T3 ... second trailer truck X ... crane Z .. lifter device

Claims (4)

  A lifter device comprising jacks (2) in the vicinity of the four corners of a lifting frame (1) having a substantially rectangular planar shape, wherein each jack (2) is stored on the lifting frame (1) side. The movable frame is mounted so as to be movable between the retracted position and the jumping position jumping sideways from the lifting frame (1), and the lower side of the lifting frame (1) is located near the four corners of the lifting frame (1). The lifter device is characterized in that a grounding leg (4) that protrudes to the ground is mounted on the truck bed.   The lifter device according to claim 1, wherein each of the grounding legs (4) is provided at a position closer to an inner side than each of the jacks (2) in a retracted position.   3. The lifter device according to claim 1, wherein each of the grounding legs (4) is provided in a posture in which the grounding leg (4) is inclined downward toward the outside in the width direction of the elevating frame (1).   The lifter device according to any one of claims 1 to 3, wherein each of the grounding legs (4) is attached so that a protruding amount downward from the elevating frame (1) can be adjusted.

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