JP3237742B2 - Lifting frame of casing driver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting frame for a rotary casing driver for press-fitting and pulling out large-diameter steel pipe piles or steel pipes (hereinafter referred to as casings) used for foundation work of construction and civil engineering. About.

[0002]

2. Description of the Related Art In a rotary casing driver, a lifting frame is mounted on a base frame held horizontally by a jack so as to be vertically movable by a thrust cylinder, and a rotating ring is mounted on the lifting frame via a swivel bearing.
The rotating ring is configured to be rotated by a hydraulic motor mounted on an elevating frame, and a band device including a casing gripping band and a hydraulic band cylinder is mounted on the rotating ring.

When the casing is press-fitted by a casing driver, hydraulic fluid is supplied to the band cylinder, the band is operated in the closing direction, the casing is chucked by the band, and when the chucking is completed, the thrust cylinder is raised and lowered. Simultaneously with the operation in the lowering direction of the frame, the rotating body including the rotating ring and the band device is rotated or rocked together with the casing by a hydraulic motor.

In such a casing driver,
With the rise of buildings in recent years, the diameter of casings has also increased, and large-sized ones have to be transported separately for each component. Of the components, the lifting frame cannot be transported by itself when the size is further increased, and the lifting frame is divided into a plurality of frames and transported.

In this elevating frame, when a hydraulic motor for rotationally driving the rotating ring is located on the outer peripheral portion of the elevating frame, the rotating ring is attached to the outer ring of the slewing bearing, and the inner ring is attached to the elevating frame. And
The elevating frame is divided into three parts: an intermediate divided frame including the circular opening, and other divided frames. In addition, it has a configuration for assembling and disassembling on site.

[0006]

With the recent increase in the height of the building and the increase in the diameter of the casing accompanying the demand for increased pile support, the size and weight of the intermediate divided frame having a circular opening with the conventional structure have been increased. And for this,
There is a problem in that transportation is not easy, and following the conventional divided structure of the elevating frame hinders an increase in the size of the casing driver.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides an elevating frame having a structure in which the elevating frame can be divided into smaller parts even if the casing driver is enlarged, transportation is facilitated, and the casing driver can be further enlarged. The purpose is to provide.

[0008]

According to a first aspect of the present invention, there is provided an elevating frame mounted on a base frame held horizontally by a jack so as to be vertically movable by a thrust cylinder. A casing driver comprising: a rotating ring rotatably mounted on a rotating frame via a slewing bearing and rotated or oscillated by a hydraulic motor mounted on a lifting frame; and a casing gripping band device mounted on the rotating ring. in, structure of the lifting frame, the plurality of divided frame mounting seats are divided by division of the swing bearing
And the mutual alignment of the divided frames of the elevating frame
Parts with horizontal flanges, which are connected to each other.
Prevents relative vertical movement of combined frames
It is characterized by the provision of a restricting means .

A second aspect of the present invention is that a hydraulic motor for rotating a rotating ring is mounted on opposite ends of the lifting frame, and the lifting frame is divided into an end divided frame to which the hydraulic motor is mounted, and an end divided frame. It is characterized by being divided into intermediate divided frames.

[0010]

According to a third aspect of the present invention, the restricting means for preventing the relative vertical movement of the divided frames comprises vertical bolts for fastening horizontal flanges of the divided frames which are in contact with each other. I do.

According to a fourth aspect of the present invention, the lifting frame is
In addition to dividing the end ring into two end division frames and an intermediate division frame therebetween, the intermediate division frame has an upper length in the tangential direction of the rotating ring longer than a lower length, and the both ends in the tangential direction. An upper vertical flange, a lower vertical flange, and a horizontal flange provided between the upper and lower vertical flanges are provided in a joint portion with the end frame.

The invention according to a fifth aspect is characterized in that a means for positioning the divided frames in the horizontal direction is provided at the joining portion of the divided frames.

According to a sixth aspect of the present invention, the positioning means comprises:
It is characterized by comprising a guide pin provided on one horizontal member forming a horizontal alignment surface and a pin hole provided on the other horizontal member and fitted with the guide pin.

[0015]

According to the first aspect, since the lifting frame is divided so as to divide the mounting seat, the size of the intermediate divided frame does not increase in proportion to the diameter of the opening of the lifting frame. Can be made smaller than before. Also, the horizontal flanges of the split frame
As well as restricting them from moving up and down,
The machine has no step on the mounting bearing surface of the slewing bearing.
Machine processing can be performed.

According to the second aspect of the present invention, the lifting frame is divided so as to be divided into an end divided frame provided with hydraulic motors at both ends and an intermediate divided frame. In addition to being easy to divide and easy to assemble, the middle divided frame can be configured to have the same shape on the left and right, so that manufacturing is also facilitated.

[0017]

According to the third aspect , by fastening the horizontal flanges to each other with the vertical bolts, the distortion of the flanges can be corrected and the machining accuracy of the mounting seat surface can be further improved.

According to the fourth aspect of the present invention, the upper side of the intermediate divided frame is made longer than the lower side, and a horizontal flange for connecting the adjacent divided frames is provided. And easy assembly and disassembly.

In the fifth aspect , since the positioning means in the horizontal direction is provided, the positioning of the fastening portion by the bolt and the nut becomes easy. As in claim 6, by performing the alignment by the guide pins, the alignment only in the bolt holes hanging divided frame by crane can, assembly, disassembly is facilitated.

[0021]

1 (A) and 1 (B) are a plan view and a side view showing an embodiment of a lifting frame according to the present invention, and FIGS. 2 and 3 are provided with the lifting frame of FIG. 1, respectively. It is a side view and a plan view of a casing driver,
As shown in FIGS. 2 and 3, the casing driver 1
A base frame 3 held horizontally by a jack 2 at a corner is provided. The base frame 3 has a rectangular frame shape having vertical guide frames 3a to 3d at four corners, and is divided by a flange 3e. 4 is the vertical guide frame 3a
The lifting frame 4 is attached to the base frame 3 and the lifting frame 4 so as to be able to move up and down along 3d.

A rotary ring 7 is mounted on the lifting frame 4 via a swivel bearing 6. EE in FIG.
As shown in FIG. 4 (A) which is an enlarged sectional view, a mounting seat 4 for a slewing bearing 6 is provided on the inner peripheral side of the upper surface of the lifting frame 4.
a mounting seat surface 4b to which the inner ring 6a of the slewing bearing 6 is fixed is formed on the upper surface of the mounting seat 4a, and the inner ring 6a is fixed to the mounting seat 4a by bolts 9. The outer ring 6b of the slewing bearing 6 has an external gear 6c, and as shown in FIGS. 1A and 1B, the external gear 6c
Meshes with the output gear 11 of the hydraulic motor 10 attached to the elevating frame 4, and the rotation of the hydraulic motor 10 causes the outer ring 6b to rotate. As shown in FIG. 4A, the outer ring 6b
The rotating ring 7 is fixedly mounted on the bolt 12 on the upper side.

As shown in FIGS. 2 and 3, a band device 14 for gripping the casing 13 is mounted on the rotating ring 7. The band device 14 includes a substantially semicircular fixed band 14 a fixed to the rotating ring 7 and the fixed band 1.
4a, and a pair of movable bands 14b, 14c attached to the ends of the movable bands 14b, 14c so as to be freely opened and closed about pivot shafts 15, 16;
And a hydraulic band cylinder 14d for opening and closing the band, which is connected and attached by 7, 18.

Each of the guide frames 3a to 3d has two guide surfaces a and b. One guide surface a is a surface that receives a rotational reaction force, and is provided so as to be substantially perpendicular to the tangential direction of the rotating circle of the rotating ring 7. The other guide surface b suppresses horizontal fluctuation of the lifting frame 4 and stably supports the same. The lifting frame 4 has a surface that slides on each of the surfaces a and b of the guide frames 3a to 3d.

Next, the division structure of the lifting frame 4 according to the present invention will be described. In the present invention, the lifting frame 4 is divided into divided frames 21 to 24 so as to divide the mounting seat 4a of the swing bearing 6 shown in FIG. As described above, if the lifting frame is divided so as to divide the mounting seat 4a, the size of the divided frame including the central opening is smaller than the mounting seat of the lifting frame 4 as in the case of employing a divided structure that does not divide the mounting seat. 4a can be prevented from increasing in proportion to the outer diameter.

In this embodiment, as shown in FIGS. 1 to 3, a hydraulic motor 10 for rotating the rotating ring 7 is attached to opposite ends, and the lifting frame 4 is connected to the end on which the hydraulic motor 10 is attached. Divided frames 21, 22
And the left and right intermediate divided frames 23 and 24 between them are divided into four parts. With such a divided structure, the divided part is a part separated from the hydraulic motor 10, and the division is easy, and In addition to being easy to assemble, they can be configured symmetrically, the end divided frames 21 and 22 can be configured identically, and the intermediate divided frames 23 and 24 can also be configured identically, which facilitates manufacture and balance. It will be good.

In the case where the mounting seat 4a is divided as described above, if the mounting seat 4a of the slewing bearing 6 becomes uneven, the slewing bearing 6 is deformed, resulting in insufficient strength or hindered smooth slewing. May be damaged. The present embodiment has a structure for eliminating such a problem. That is, the end divided frame 2
The division part between the intermediate divided frames 23 and 24 of the first and the second 22 is
As shown in FIG. 1B, FIG. 2 and FIG. 4B, it is formed so as to form a step shape when viewed from the outside. Then, a vertical flange d protruding upward and outward is formed by the outer peripheral portion of the vertical member on the end face in the upper half portion of the divided portion on the side of the end divided frames 21 and 22. Similarly, a vertical flange f protruding downward and outward is formed by the outer peripheral portion of the end face vertical member in the lower half portion on the side of the divided end portions 21 and 22 at the divided portion. In the horizontal portions of the end divided frames 21 and 22,
As shown in FIG. 4C, which is a cross-sectional view taken along line FF of FIG. 4B, as one representative example of one of the end divided frames 22, the vertical members 22a on the outer peripheral side and the inner peripheral side of the end divided frame 22 are shown. , 2
An end of the horizontal member 29 fixed to the upper surface of the intermediate horizontal portion 2b is projected outward and inward to form a horizontal flange h.

Both ends of the intermediate divided frames 23 and 24 in the tangential direction of the rotary ring 7 are divided into end divided frames 21 and 22.
And vertical flanges c and e and a horizontal flange g which face and abut against the vertical flanges d and f and the horizontal flange h. FIG.
As shown in FIG. 4C, the horizontal flange g is formed on the intermediate horizontal portion of the vertical members 23a and 23b on the outer peripheral side and the inner peripheral side, as shown in FIG. The end of the horizontal member 28 fixed to the lower surface is formed by protruding outward and inward.

As shown in FIG. 4B, the intermediate divided frames 23 and 24 and the end divided frames 21 and 22 are formed by connecting the vertical flanges c and e of the intermediate divided frames 23 and 24 to the end divided frames 21 and 22. And horizontal flanges g of the intermediate divided frames 23 and 24.
Are mounted on the horizontal flanges h of the end divided frames 21 and 22 and fastened by the horizontal bolts 25 and the vertical bolts 26, respectively. As shown in FIGS. 4B and 4C, these bolts 25 and 26 are fastened by screwing and tightening a nut 27 provided on the back surface.

In the case of the above-mentioned divided structure, the mounting seats 4a are fixed on the respective divided frames 21 to 24, but there are no flanges c and d at the portions where the mounting seats 4a of the divided frames 21 to 24 are fixed. .

As shown in FIG. 4 (C), a guide pin 19 called a knock pin is provided on the horizontal member 29 of each of the end divided frames 21 and 22, and a screw portion 19a at the lower end thereof is attached to the horizontal member 29. The guide pins 1 are attached to the horizontal members 28 at both ends of the intermediate divided frames 23 and 24 mounted on the horizontal members 29 by being screwed into the screw holes 29a.
9 are provided with pin holes 28a to be fitted therein, and these constitute horizontal positioning means during assembly.

Next, the operation of the structure for preventing the relative vertical movement by providing such horizontal flanges g and h and fastening with the vertical bolts 26 will be described. Each divided frame 2
Mounting seat 4a of slewing bearing 6 fixed on 1 to 24
Is machined by the following procedure so that no step is formed between the divided frames 21 to 24. That is, the mounting seat 4a before processing is fixed to the divided frames 21 to 24 by welding and fixed thereto, and the flanges c to
Machine h.

In processing the flanges d, f, and h of the end divided frames 21 and 22, the end divided frames 2
After machining the mounting portions of the hydraulic motors 1 and 22, the flanges d, f, and h are pressed down from the mounting center of the mounting portions. On the other hand, the intermediate divided frame 23,
In machining the 24 flanges c, g, and e, the dimensions between the flanges at both ends of the intermediate divided frames 23 and 24 are suppressed. And then, the flange c ~
The mounting holes for the bolts 25 and 26 of h are made, and the mounting screw holes 29 and the pin holes 28a for the guide pins 19 are made.

Then, the end divided frames 21 and 22 and the intermediate divided frames 23 and 24 are first fastened with vertical bolts 26 to perform vertical alignment, and then fastened with horizontal bolts 25 to mount the slewing bearing 6. The mounting seat surface 4b on the seat 4a is machined. According to the above procedure, a step does not occur on the mounting seat surface 4b between the end divided frames 21, 22 and the intermediate divided frames 23, 24. In addition, vertical bolt 2
6, the distortion of the horizontal flanges g and h can be corrected, and the vertical positioning between the end divided frames 21 and 22 and the intermediate divided frames 23 and 24 can be reliably performed.

Although the guide pin 19 has no function of eliminating the step of the mounting seat surface 4b, it eliminates the horizontal displacement between the divided frames, especially the displacement of the fitting portion 4c of the mounting seat surface 4b with the inner ring 6a. Can be eliminated.

Next, the operation of the horizontal flanges g and h and the vertical bolt 26 of each of the divided frames 21 to 24 when the casing 13 is pressed and pulled out will be described. FIG. 2, FIG.
As shown in (1), the thrust cylinder 5 for moving the lifting frame 4 up and down is attached to the end divided frames 21 and 22. On the other hand, the casing 13 is
When the thrust cylinder 5 is reduced and moved downward, when the press-fit resistance of the casing 13 is large, the base frame 3 rises from the ground. Therefore, the pressure input of the casing 13 includes not the cylinder force of the thrust cylinder 5 but the weight of the casing 13 and the weight of the casing driver 1 (the weight of the casing driver 1 if a weight (not shown) is held around the casing driver 1). ) Only works. On the other hand, when the casing 13 is pulled out, the thrust cylinder 5 is extended, so that the base frame 3 does not rise from the ground even if the pullout resistance is large. Therefore, the maximum pulling force is the thrust cylinder force. For this reason, the pulling force is about five times greater than the pushing force.

Although the gap between the vertical flanges c and d or between e and f is not so large, the fastening force of the lateral bolt 25 is loosened, and the end divided frame is provided by the gap between the lateral bolt 25 and the bolt hole. 21, 22 and the intermediate divided frame 23,
It is assumed that the space between the position and the position 24 moves relatively up and down. If it moves, the casing 1
The load accompanying the press-fitting and pulling-out of No. 3 acts, which may lead to breakage. However, in this embodiment, such a situation can be prevented.

That is, in this embodiment, the intermediate divided frames 23 and 24 have a tangential length of the rotary ring 7 longer in the upper part than in the lower part, and the horizontal flange g is connected to the horizontal parts of the end divided frames 21 and 22. Since the horizontal flanges g and h are fastened to each other by the vertical bolts 26, the horizontal bolts 25 are slightly loosened, and the intermediate divided frames 23 and 24 are connected to the end divided frames 21 by the gap of the bolt holes. , 22 when the casing 13 is press-fitted,
3 and 24 are supported by the end divided frames 21 and 22 via the vertical bolts 26, and at the time of pull-out in which a force approximately five times greater than that at the time of press-fitting is applied, the intermediate divided frame 23 is brought into contact with the horizontal flanges g and h. , 24, and a greater supporting force can be obtained by surface contact than by bolts. Therefore, this structure has a rational design taking into account the necessary supporting force at the time of press-fitting and pulling-out of the casing. End support frame 2 in any case.
The intermediate split frames 23 and 24 can be supported by the components 1 and 22 without damaging the components.

Even if the vertical bolts 26 are slightly loosened as in the case of the horizontal bolts 25, the vertical displacement width caused by the loosening is limited by the assumption that there is no restricting means for preventing vertical movement. Since the displacement width when the horizontal bolt 25 is loosened is much smaller than the displacement width, the looseness of the vertical bolt 26 has little effect on the slewing bearing 6 due to the strength surface and rotation. It is well known that it is naturally performed that the bolted portion is regularly inspected for retightening or the like, so that it is possible to avoid seriously affecting the slewing bearing 6.

Next, the disassembling and assembling procedures in the case of the divided structure of the lifting frame 4 of this embodiment will be described with reference to FIGS.
This will be described below. First, the assembling procedure will be described. When assembling the elevating frame 4, first, as shown in FIG.
The gantry 30 is provided with positioning means 30a and 30b having a connecting means with the gantry 30 for clarifying the mounting position of the end divided frame 21. Also, when assembling the intermediate divided frame 23, a gantry 31 provided for safety so that it can receive the side opposite to the side supported by the end divide frame 21 during the assembling operation. But not) standing on the ground.

FIG. 5B shows a state where the intermediate divided frame 23 is suspended by the crane 32. When the intermediate divided frame 23 is suspended, the guide pins 19
Is mounted on the horizontal member 29 of the end division frame 21, so if the guide pin 19 is inserted into the pin hole 28a of the horizontal member 28 of the intermediate division frame 23 and hung down,
The intermediate divided frame 23 is automatically positioned with respect to the end divided frames 21 and combined. After that, the end divided frame 21 and the intermediate divided frame 23 are fastened with the bolts 25 and 26. FIG. 6 (A) shows the state of the thus fastened state. At this time, a gap of several mm is generated between the intermediate divided frame 23 and the gantry 31. This is because when the ends of the intermediate divided frame 23 are placed on the gantry 31 at the time of fastening with the bolts 25 and 26, the flanges c, g, e, d, and h are affected by the installation error of the height of the gantry 31 and the like. , F to prevent a gap from occurring. When the intermediate divided frame 23 becomes unstable, the end is supported by the gantry 31. The other intermediate divided frame 2
4 is attached in the same manner.

Thus, the intermediate divided frames 23, 2
4 is divided into the end divided frames 2 by fastening bolts 25 and 26.
When the other ends of the intermediate divided frames 23 and 24 are fastened to the other end divided frame 22 after being fastened to FIG.
As shown in (B), the end divided frame 21 and the intermediate divided frames 23 and 24 fastened to each other are combined with the end divided frame 21 and positioning means 30a, 3 having connecting means.
It is lifted by the crane 32 together with the gantry 30 connected by Ob. The other end divided frame 22 is set on another stand 33 provided with positioning means 33a and 33b having connecting means via the positioning means 33a and 33b. The intermediate divided frames 23 and 24, which are integrally fastened together with the gantry 30 and the end divided frames 21 and lifted by the crane 32, to the end divided frames 22 on the gantry 33, are pin holes 28 of the horizontal member 28.
a is fitted to the guide pin 19 fixed to the horizontal member 29 of the end portion divided frame 22, and is lowered.
5 and 26, fastening is performed as shown in FIG.

The employment of the above-described assembling procedure is performed so that the intermediate divided frames 23 and 24 can be moved upward with respect to the end divided frames 21 and 22.
4 is configured to be longer than the lower side, and guide pins 19 are attached in the vertical direction, and horizontal flanges g and h are provided to position the intermediate divided frames 23 and 24 with respect to the end divided frames 21 and 22. Depends on what was made easier.
As a result, work efficiency can be significantly improved.

On the other hand, the end divided frames 21 and 22
Are placed on the frames 30 and 33 in advance, and are placed on the ground with the respective frames separated by the insertion interval of the intermediate division frames 23 and 24. The intermediate division frames 23 and 24 are suspended by the crane 32 to separate the ends. When the assembly procedure of inserting between the frames 21 and 22 is adopted, the end divided frame 2
Insertion is impossible if there is no gap between the first and second intermediate frames 23 and 24. Therefore, the intermediate divided frame 2 is located between the end divided frames 21 and 22 at one time.
To incorporate 3 or 24, the end divided frames 21 and 22 need to be separated by more than the length of the intermediate divided frames 23 and 24.
4 is inserted between the end divided frames 21 and 22, and the end divided frames 21 and 22 must be moved laterally so as to close the gaps between the vertical flanges c and d and between e and f. This will reduce efficiency.

Next, the disassembly procedure will be described with reference to FIGS. First, of the frames 30 and 33 shown in FIG.
One mount 33 is placed on the ground. As shown in the plan view of FIG. 7C, the gantry 33 has a bracket 35 having a U-shape in plan view. As shown in FIG. 7B, a spacing member 34 having a vertical portion 34b fitted at one end in the bracket 35 and a receiving surface portion 34a of the gantry 30 provided at the other end is prepared. As shown in FIG. 8A, the vertical portion 34 of the spacing member 34 is attached to the bracket 35.
b, the spacing member 34 is
And mount the other frame 30 on the frame 3
3 and brought into contact with the receiving surface 34a of the spacing member 34. As a result, the interval between the gantry 30 and 33 is automatically set to a fixed interval determined by the interval holding member 34.

Thereafter, the divided frames 21 to 24 are placed on the frames 30 and 33 while being integrated. Then, the end divided frames 21 and 22 are positioned by positioning means 30a,
30b, 33a, 33b respectively
And the intermediate divided frames 23 and 24 and the end divided frames 2 are removed by removing the bolts 25 and 26.
Unfasten with 1 and 22. Even if you break the bond like this,
Since the horizontal flanges g at both ends of the intermediate divided frames 23 and 24 are mounted on the horizontal flanges h of the end divided frames 21 and 22, even if the bolts 25 and 26 are removed, the intermediate divided frames 23 and 24 are removed. Does not fall.

Next, as shown in FIG.
In step 2, the intermediate divided frame 23 or 24 is lifted.
In this case, since the intermediate divided frames 23 and 24 are configured so that the upper side is longer than the lower side and the guide pins 19 are provided in the vertical direction, if the intermediate divided frames 23 and 24 are lifted by the crane 32, The intermediate divided frames 23 and 24 can be removed without moving the 32. Thereafter, the spacing member 34 is removed from the bracket 35. The end division frames 21 and 22 are transported while being mounted on the gantry 30 and 33, respectively.

In the above embodiment, the vertical bolt 26 is used as a regulating means for preventing the intermediate divided frames 23, 24 from moving up and down with respect to the end divided frames 21, 22.
In addition, guide pins 19 are used as horizontal positioning means to prevent positioning and mounting displacement between the divided frames. The vertical movement restricting means is a side view of FIG. 9A and a partial plan view thereof. As shown in FIG. 9B, FIG. 9C which is a partially enlarged view of FIG. 9A, and FIG. 9D which is a partially broken enlarged view of FIG. At the top of the upper vertical flanges d of the divided frames 21 and 22, projections i formed integrally or by welding plates are provided so as to project toward the intermediate divided frames 23 and 24, and the intermediate divided frame 23 is provided between the projection i and the horizontal flange h. , 24, a structure in which the portion between the horizontal flange g and the upper vertical flange c is fitted to restrict vertical movement. The horizontal positioning between the end divided frames 21 and 22 and the intermediate divided frames 23 and 24 is performed by the end divided frames 21 and 22.
The intermediate divided frame 2 is attached to the vertical flanges d and f on the outer peripheral side of
3 and 24 are provided with projections j formed integrally or by a welding plate.
By positioning the end faces of the outer peripheral side vertical flanges c and e of 3 and 24 in contact with each other, positioning in the horizontal direction (radial direction of the rotating ring 7) is performed.

The projections i for regulating the vertical movement are provided at the lower ends of the lower vertical flanges e of the intermediate divided frames 23 and 24 so as to protrude toward the end divided frames 21 and 22. In the projection, the end divided frame 21,
The lower flange 22 may have a structure in which the lower end surface of the vertical flange f is brought into contact with the horizontal flange g and the portion between the horizontal flange h and the lower vertical flange f of the end divided frames 21 and 22 is fitted between the projections and the horizontal flange g. Or both.

The horizontal positioning means may be provided not on the end divided frames 21 and 22 but on the intermediate divided frames 23 and 24 so as to protrude toward the end divided frames 21 and 22. Also, projections j may be provided on the outer peripheral side and inner peripheral side of the end divided frames 21 and 22 or projections may be provided on the outer peripheral side and inner peripheral side of the intermediate divided frames 23 and 24 to provide an outer peripheral side. The positioning in the horizontal direction may be performed on both the inner peripheral side.

According to the embodiment shown in FIG. 9, the intermediate divided frames 23 and 24 are not moved upward and detached with respect to the end divided frames 21 and 22 but are moved horizontally to be attached and detached. Therefore, it is necessary to fit the flanges c to h, and the assembling and disassembling workability is not good.
Since the positioning of the rotation bearing 6 can be surely performed, and particularly, the displacement in the vertical direction can be prevented, the slewing bearing 6 is deformed,
It does not cause insufficient strength or hinder smooth turning. Further, since the horizontal flanges g and h are supported by a structurally larger area than the protrusion i for regulating the vertical movement, the difference in the load that can be supported is the same as in the above-described embodiment. Considering that the drawing is performed, it can be said that the supporting structure is reasonable as in the embodiment shown in FIGS.

The present invention can be applied to a structure in which the inner ring side of the slewing bearing 6 rotates. Further, the dividing structure of the present invention may be a structure in which the butted surfaces of the divided frames are fitted into concave and convex.

[0053]

According to the first aspect, since the elevating frame is divided by the structure for dividing the mounting seat, the size of the intermediate divided frame does not increase in proportion to the diameter of the opening of the elevating frame. The degree of freedom of the frame division design is increased, and it is possible to easily select a size and a weight below the transport limit. Therefore, the obstacle to the enlargement of the casing driver due to the limitation of the weight and the size of the divided frame is eliminated, and the casing driver can be enlarged, and the transportation is facilitated by the reduced size of the divided frame.
Also, at the joint of the divided frames of the lifting frame
A horizontal flange is provided and connected to each other by the horizontal flange.
Control means to prevent vertical movement of the divided frame
Slewing bearing provided on the lifting frame
Machining without generating a step on the mounting seat surface
As a result, turning due to the reduced flatness of the mounting seat surface
Excessive force acting on the bearing caused insufficient strength
Without impairing the smooth rotation of the slewing bearing.
No. In addition, during excavation work,
Even if the bolts that fasten the
Since the vertical displacement of the split frames is prevented,
Insufficient strength of the rotating bearing can be prevented.

According to the second aspect of the present invention, a hydraulic motor for rotating the rotating ring is attached to opposite ends of the lifting frame, and the lifting frame is divided into an end divided frame to which the hydraulic motor is mounted, and these end divided frames. Since the frame is divided into the left and right intermediate divided frames between the frames, a portion remote from the hydraulic motor is divided, and therefore the division is easy and the assembly is easy. Further, since the lifting frame can be made symmetrical and the divided frames can be made the same shape, it is easy to manufacture. Further, since the divided frames are divided into symmetrical or nearly symmetrical structures, the balance is good.

[0055]

According to the third aspect , since the vertical bolts for fastening the horizontal flanges are used as means for regulating the vertical movement of the divided frames by aligning the horizontal flanges, the horizontal flanges are fastened by the vertical bolts. By doing so, the distortion of the flange can be corrected, the vertical relationship between the two divided frames to be connected can be stably maintained, and the machining accuracy of the mounting seat surface can be further improved.

According to the fourth aspect , the upper side of the intermediate divided frame is made longer than the lower side, and the horizontal flange connected to the adjacent divided frame is provided, so that the divided frame is suspended and lifted by the crane to assemble and disassemble. And assembly and disassembly are facilitated. In addition, at the time of pulling out which requires a large supporting force, the supporting force is received by the surface contact between the horizontal flanges, so that a rational structure is obtained.

According to the fifth aspect , since the horizontal frame positioning means for the divided frames is provided at the joining portion of the divided frames, the positioning of the fastening portion by the bolts and the nuts becomes easy, and at the time of assembly, The mounting seat surface can be easily and accurately adjusted.

According to the sixth aspect , the guide pins are provided in the vertical direction as horizontal positioning means, so that the bolt holes can be positioned only by hanging the divided frame by the crane, which facilitates assembly and disassembly. Become.

[Brief description of the drawings]

FIGS. 1A and 1B are a plan view and a side view, respectively, showing an embodiment of a lifting frame according to the present invention.

FIG. 2 is a side view of a casing driver including the lifting frame of FIG. 1;

FIG. 3 is a plan view of a casing driver including the lifting frame of FIG. 1;

4A is an enlarged cross-sectional view taken along line EE of FIG. 3, FIG. 4B is an enlarged view of a main part of FIG. 1B, and FIG. 4C is a cross-sectional view taken along line FF of FIG.

FIGS. 5A and 5B are side views showing a part of an assembling process of the elevating frame according to the present embodiment.

FIGS. 6A and 6B are side views showing the rest of the assembling process of the elevating frame according to the present embodiment.

FIG. 7A is a side view showing an assembling state of the elevating frame according to the present embodiment on a gantry before completion of assembly or before disassembly;
(B) is a side view which shows the space | interval holding member which maintains the space | interval between mounts constant, (C) is a top view which shows the bracket which attaches the space | interval maintenance member of (B).

FIG. 8A is a side view showing a gantry of the lifting frame according to the present embodiment, and FIG. 8B is a side view showing a state in which the intermediate divided frame is lifted by a crane when the lifting frame is disassembled.

FIG. 9A is a side view showing another embodiment of the present invention,
(B) is a partial plan view of (A), (C) is a partially enlarged view of (A), and (D) is a partially broken enlarged view of (B).

[Explanation of symbols]

1: casing driver, 2: jack, 3: base frame, 4: lifting frame, 4a: mounting seat, 4b: mounting seat surface, 5: thrust cylinder, 6: slewing bearing, 6
a: inner ring, 6b: outer ring, 6c: external gear, 7: rotating ring, 10: hydraulic motor, 11: output gear, 13: casing, 14: band device, 14d: band cylinder, 1
9: guide pin, 21, 22: end divided frame, 2
3, 24: intermediate split frame, 25: horizontal bolt, 26:
Vertical bolt, 27: Nut, 28, 29: Horizontal member, 28
a: Pin hole, 30, 31, 33: Stand, 30a, 30
b, 33a, 33b: positioning means, 32: crane,
34: spacing member, 35: bracket

Claims (6)

(57) [Claims] 1. A base plate which is held horizontally by a jack.
Mounted on the frame using a thrust cylinder
The lifting frame is rotatably mounted on the lifting frame via a slewing bearing.
Hydraulic motor attached to the lifting frame
Rotating ring to be rotated or oscillated, and a casing gripping band mounted on the rotating ring
A casing driver provided with a device, wherein the lifting frame is separated from a mounting seat of the swing bearing.
With multiple divided framesMake up, Water is applied to the joints of the divided frames of the lifting frame.
Provide a flat flange, The horizontal flange is provided with
Restriction means to prevent vertical movement against thing
A casing driver lifting frame. 2. The apparatus according to claim 1, wherein a hydraulic motor for rotating a rotating ring is mounted on opposite ends of the lifting frame, the lifting frame is divided into end divided frames to which the hydraulic motor is mounted, and these ends. An ascending / descending frame of a casing driver, which is divided into an intermediate divided frame between divided frames. 3. The method according to claim 1, wherein  The restricting means is arranged so that the divided frames contact each other horizontally.
It consists of vertical bolts that fasten flanges
Frame of the casing driver. 4. In any one of claims 1 to 3,  The lifting frame is placed between the end divided frames at both ends and between the divided frames.
And the left and right intermediate divided frames, and the intermediate divided frames are arranged in the tangential direction of the rotating ring.
The length of the upper part of the tangent direction is longer than the length of the lower part,
The upper vertical flange and the lower vertical flange
And the horizontal flange provided between the lower vertical flange
Lifting frame of casing driver
M 5. In any one of claims 1 to 4,  The horizontal direction between the divided frames is
Characterized in that the casing is provided with a directional positioning means.
Driver lifting frame. 6. The method according to claim 5,  The positioning means may form horizontal alignment surfaces with each other.
The guide pin provided in the vertical direction on one horizontal member and the other water
A pin hole provided in the flat member, in which the guide pin is fitted;
Elevating the casing driver
Laem.