JPH0932453A - Casing driver and connecting pin device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the labor and time required for attaching and removing a band device for a steel pipe chuck to and from the turning ring of a casing driver which is transported while the turning ring is split from the band device which is mounted on the turning ring. SOLUTION: A circular connection 17 a is provided at the top of a turning ring 17 in such a way as to project upwards, and circular connections 18, 19 are provided at the bottom of the band frame 11a of a band device in such a way as to project downwards. The connections 17a, 18, 19 are fitted together. A plurality of pin mounting holes 17d, 18a, 19a that coincide with one another are provided in the connections 17a, 18, 19 in such a way as to be oriented in the radial direction of the turning ring 17. By inserting a connecting pin 20 into the holes, the band device is connected to the turning ring 17. Preferably, taper pins are used as the connecting pins. Also, a connecting pin device is provided with a protective tube for covering the head of the connecting pin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing for press-fitting and withdrawing large-diameter steel pipe piles or steel pipes (collectively referred to as steel pipes in this specification) used for construction and civil engineering foundation works. The present invention relates to a driver, and more particularly, to a structure and a connecting pin device that are attached to a slewing wheel on a lifting frame to connect a band device for holding a steel pipe and the slewing wheel.

[0002]

2. Description of the Related Art A conventional casing driver is disclosed in Japanese Patent Laid-Open No.
As disclosed in Japanese Patent Publication No.-350936,
It has the structure shown in the half sectional side view of FIG. 10 and the plan view of FIG. That is, it is horizontally held by the jacks 1 at the four corners, and is attached to the base frame 2 in the shape of a substantially rectangular frame having the vertical guide frames 2a to 2d at the four corners, and is vertically movable along the vertical guide frames 2a to 2d. Ring-shaped elevating frame 3, a plurality of thrust cylinders 4 mounted between the elevating frame 3 and the base frame 2 to elevate the elevating frame 3, and a fixed ring (inner ring) fixed to the elevating frame 3. 5, a swivel wheel 7 rotatably mounted via a bearing 6 and mounted so as to be rotated by a hydraulic motor 8 (a pinion 9a rotated by the hydraulic motor 8 is an external gear 9b provided on the swivel wheel 7). ), And a band device 11 for gripping the steel pipe 10 attached to the slewing wheel 7. The band device 11 is a frame (hereinafter referred to as a band frame) 11a which is placed on the slewing wheel 7 and fixed by a bolt 12 which is directed upward from below.
A substantially semicircular fixed band 11b fixed to the band frame 11a, and a pair of movable bands 11e and 11f attached to both ends of the fixed band 11b so as to be openable and closable about pivot shafts 11c and 11d. , The movable bands 11
It is composed of a band cylinder 11g whose both ends are connected between the tips of e and 11f.

This casing driver is used in the band device 1.
The steel pipe 10 is hung in 1 and the band cylinder 11g is contracted to chuck the steel pipe 10, and a thrust force is applied to the steel pipe 10 by the thrust cylinder 4 while applying a force to the steel pipe 10 by the hydraulic motor 8 to rotate the steel pipe 10 together with the band device 11. The steel pipe 10 is built by rotating or rocking.

In such a casing driver,
Due to size and weight restrictions in transportation, the slewing wheel 7 and the band device 11 are usually disassembled and transported. Conventionally, the slewing wheel 7 is configured as a simple wheel body, and the bolts 12 are mounted in a vertical direction. Therefore, the slewing wheel 7 is configured in consideration of a mounting space of the bolt 12 and a relative size of the slewing wheel 7 and the bolt 12. Although the size of the bolt 12 that can be attached to the 7 is also limited, the bolt 12 of the specified size secures the coupling strength between the slewing wheel 7 and the band frame 11a, and between the slewing wheel 7 and the band frame 11a. A large number of bolts 12 of hundreds and tens were required to connect them horizontally without any gap.

[0005]

As described above, in the conventional one, the slewing wheel 7 is formed as a simple wheel body, the bolt 12 is vertically mounted, and the slewing wheel 7 is of a limited size. Since the band frame 11a is connected to the band frame 11a, a large number of bolts 12, such as hundreds of tens, are required. Therefore, during transportation, these bolts 12 are removed,
It is necessary to tighten a large number of bolts 12 at the start of work, and these bolts 12 require a tightening torque that human power does not reach, and the device for generating this tightening torque generates the necessary tightening torque. In view of this, since the bolt 12 is rotated at a slow speed, the attachment and detachment of the bolt 12 requires a lot of labor and time.

The present invention has been made in view of the above-mentioned problems, and the labor required for attaching and detaching the band device to and from the turning wheel,
An object of the present invention is to provide a casing driver having a configuration that can reduce time. Another object of the present invention is to provide a coupling pin device having a long life as a device for attaching and detaching the band device to and from the turning wheel.

[0007]

In order to achieve this object, a casing driver of the present invention is a casing driver which divides and transports a slewing wheel of the casing driver and a steel pipe chuck band device mounted thereon.
Providing an arc-shaped coupling part that protrudes above the slewing wheel,
The lower part of the frame of the band device is provided with a downwardly projecting arcuate coupling part, and these coupling parts are fitted to each other, and a plurality of pin mounting holes that match each other are provided in these coupling parts. It is characterized in that the band device is connected to the slewing wheel by arranging in a radial direction of the slewing wheel and inserting connecting pins (preferably taper pins) into these holes.

Further, the connecting pin device according to the present invention is provided on the connecting pin mounting surface of the frame of the slewing wheel or band device,
A protective cylinder surrounding the coupling pin is fixed, and a stopper for retaining the coupling pin is attached to the protective cylinder.

[0009]

According to the present invention, the arc-shaped coupling portions which are fitted to each other are provided on the upper portion of the slewing wheel and the lower portion of the frame of the band device so as to project from each other. Since the mounting holes are arranged in the radial direction of the slewing wheel and the connecting pins are inserted into these holes,
As in the conventional case, the slewing wheel is simply a ring body, and the restriction on the size of the fastener when the vertical bolts are used for the fastener is relaxed, and the fastener (coupling pin) having a larger diameter than the conventional one can be used. This is possible and the number of fasteners can be reduced significantly. Further, when the connecting pin is used, the retaining device such as a bolt used for retaining is a small size that only bears the force for retaining the retaining pin and can be easily attached and detached.

[0010]

1 is a vertical sectional view showing an embodiment of the present invention. In FIG. 1, reference numeral 3a denotes a swivel device mounting portion which is integrated with the lifting frame 3, and the swivel device mounting portion 3a.
A fixed wheel (outer wheel) 14 of the turning device is fixed to the bolt by a bolt 15. A swivel wheel (inner ring) 17 is rotatably attached to the outer ring 14 via a bearing 16. The slewing wheel 17 has a cylindrical shape, and the external gear 9b is provided at a position above the bearing 16 of the slewing wheel 17. The turning wheel 1
At the top of 7, a vertical plate-shaped band frame coupling portion 17a protruding upward in the center of the swivel wheel 17 is formed in an arc shape concentric with the swivel wheel 17, while the band frame 11a
On the lower surface of the above, two connecting portions 18 and 19 which are in the form of a vertical plate arc centered on the center of the band frame 11a are provided so as to sandwich the connecting portion 17a so as to project downward. . The band frame 11a includes the connecting portion 18,
It is fitted so as to sandwich the connecting portion 17a of the slewing wheel 17 at 19, and the lower ends of these connecting portions 18 and 19 are placed on the flat surface portions 17b and 17c on both inner and outer sides of the connecting portion 17a of the slewing wheel 17, The coupling frame 20 is coupled to the swivel wheel 17 by inserting the coupling pin 20 into the pin hole 17d provided in the coupling portion 17a and the pin holes 18a and 19a provided in the coupling portions 18 and 19, respectively.

The connecting pin 20 has a retaining mechanism 21, and the connecting pin device 2 is constituted by these.
2, details of the perspective view of FIG. 2 and the cross-sectional view of FIG.
The description will be made with reference to a view seen from the inside of the slewing wheel of (B) and a vertical sectional view of (C). As shown in FIGS. 3A and 3C, the pin hole 18a provided in the joint portion 18 inside the band frame 11a has a step portion 18b having a large diameter inside, while the joint pin 20 is provided. Is the large diameter portion 2 near the head 20a.
0b, and one end of the large diameter portion 20b is provided with the pin hole 18
The pin holes 18a, 17d, 1
Insert into 9a. When the connecting pin 20 is inserted, a part of the large-diameter portion 20b and a head portion 20a having a smaller diameter than the large-diameter portion 20b are set to protrude from the pin hole 18a.

The retaining mechanism 21 for the connecting pins 20 has a protective cylinder 23 for preventing the connecting pins 20 from being damaged by collision of excavated earth and sand. The protective cylinder 23 has a rectangular shape. The base plate 25 is welded to the base plate 25, and the base plate 25 is welded to the arc-shaped inner surface of the coupling portion 18 via the left and right base plates 24 that match the arc-shaped surface. Slits 23a and 23b into which plate-shaped stoppers 26 are fitted are provided on both sides of the connecting portion of the protective cylinder 23 to the base plate 25. The base plate 25 has a large diameter portion 2 of the connecting pin 20.
It has a hole 25a in the center for passing 0b. The head portion 20a of the coupling pin 20 has a screw hole 20c into which a drawing tool (not shown) is screwed.

In this connecting pin device 22, the connecting pin 20 is provided with a hole 25a in the base plate 25 and the pin holes 18a, 17a.
The left and right stoppers 26 are inserted into the slits 23a and 23b of the protective cylinder 23, respectively, and are inserted into the large diameter portion 20b.
The holes 26a, 26 of the stoppers 26 against the indoor end of the
The bolts 27 are inserted into b and screwed into the screw holes 25b at the four corners of the base plate 25, whereby the stoppers 26 are fixed and the coupling pins 20 are prevented from coming off. At the time of disassembly, the bolt 27 is removed and the stopper 26 is attached to the slit 2 of the protective cylinder 23.
3a and 23b, and the connecting pin 20 is pulled out by screwing the threaded portion at the tip of the extraction tool into the screw hole 20c of the head 20a of the connecting pin 20.

As described above, the slewing wheel 17 and the band frame 11a are vertically projected so that the connecting portions 17a, 1
If 8 and 19 are provided and the structure in which the swivel wheel 17 and the band frame 11a are coupled by the coupling pin 20 that is inserted into the hole provided in the coupling portion in the radial direction, the radial size of the casing driver is changed. However, it is sufficient to secure only the width of the upper and lower coupling portions, and a large size coupling pin 20 can be used. For example, the band frame 11a is coupled to the swivel wheel 17 by a small number of coupling pins 20 of 20 or less. can do. In addition, the retaining mechanism 2
The bolt 27 used for 1 does not connect the slewing wheel 17 and the band frame 11a by itself, and may have a function of merely preventing the stopper 26 from coming off from the slits 23a and 23b. Since it can be quickly attached and detached without using a small bolt and a special tightening device that gives tightening force, it can be used with the slewing wheel 17 in a much shorter time and with less labor than the conventional one, in addition to reducing the number of bolts. Attachment and detachment work with the band frame 11a can be performed.

FIG. 4 is a view showing a modified example of the structure of the connecting portion between the slewing wheel 17 and the band frame 11a in FIG. 1, in which the top of the slewing wheel 17 is connected in an arc shape with the center of the slewing wheel 17 as the center. The portions 17e and 17f are provided so as to project upward, and an arc-shaped coupling portion 28 that is integrally provided by projecting downward to the lower surface of the band frame 11a is fitted between these coupling portions 17e and 17f. Coupling parts 17e, 17f
The coupling pin 20 is passed through the pin holes 17g and 17h provided in the above and the pin hole 28a provided in the coupling portion 28, and is prevented from coming off by the same retaining mechanism 21 as described above.

FIG. 5 shows another embodiment of the present invention. In order to make the connecting pin 20 attachable to and detachable from the outside of the casing driver, the head of the connecting pin 20 should be positioned outward and outside the casing driver. It is provided. According to the present embodiment, the attachment (attachment pin 20) can be attached and detached more easily than the conventional example and the above-described embodiment, and the attachment and detachment of the attachment pin 20 can be performed as compared with the embodiment. In order to secure the work space, there is an advantage that the downward extension of the cylindrical portion 11h of the band frame 11a is not restricted.

FIG. 6A shows another embodiment of the present invention.
The fixed ring 30 fixed to the lifting frame 3 is the inner ring, the turning wheel 3
1 is an outer ring, and the outer ring 31 and the band frame 11a are connected by a connecting pin 20 that is detachably attached from the outside of the structure similar to the example of FIG. As described above, the structure in which the outer wheel is the turning wheel 31 can also be applied to a structure in which the coupling pin 20 is attached and detached from the inside of the casing driver as shown in FIGS. 1 and 4.

FIG. 6 (B) is a front view and a vertical sectional view showing another example of the retaining mechanism by the connecting pin 32 of the present invention, and shows the mounting surface 33 of the connecting pin 32 of the swivel wheel or the band frame 11a. In contrast, fix the protection tube 34,
Holes 34a, 3 penetrating in the radial direction above and below the protective cylinder 34
4b is provided, the pin-shaped stopper 35 inserted into the holes 34a, 34b is penetrated, and the stopper 35 is brought into contact with the tip end surface of the head portion 32a of the coupling pin 32 to prevent the coupling pin 32 from coming off. It is a thing. The stopper 35 is prevented from coming off from the protective cylinder 34 by the top portion 3 of the stopper 35.
This is performed by a ring 36 that is partially rotatably passed through 5a. That is, as shown by the chain double-dashed line in FIG. 6C, the ring 36 is placed in the posture shown by the chain double-dashed line, the stopper 35 is inserted into the holes 34a and 34b of the protective cylinder 34, and then the arrow R As shown by, the ring 36 is rotated to enclose the protective cylinder 34 with the ring 36, so that the stopper 35 is prevented from coming off. According to this embodiment, there are advantages that the structure is relatively simple and the attachment / detachment is easy.

FIG. 7 is a longitudinal sectional view showing an example in which a taper pin is used to prevent rattling, FIG. 8A is a partially enlarged view thereof, and FIG. 8B is a head part of the taper pin. It is the figure seen from the left side of (A). This embodiment is different from the embodiment shown in FIG. 1 in that a connecting portion 37 having a tapered cross-sectional shape is provided on the top of the slewing wheel 17, and the band frame 11a is formed with a tapered surface that fits into the connecting portion 37. Part 38,
39 is fixed, and the joint portion 37 and one joint portion 38
The tapered holes 37a and 38a communicating with each other,
A taper pin 40 is provided in these taper holes 37a and 38a.
And tighten the bolt 41 through the hole 40a provided in the taper pin 40, and insert the head 41a of the bolt 41 into the hole 4a.
0a fitted into the enlarged portion 40b, and the bolt 41 into the connecting portion 3
9 is screwed into the screw hole 39a, and the head 41a of the bolt 41 is
By fitting and turning a tool (not shown) having a hexagonal cross section in the hexagonal hole 41b, the taper pin 40 is tightly fitted in the taper holes 37a and 38a, and the turning wheel 17 does not rattle. And the band frame 11a are combined.

FIGS. 9A and 9B are views corresponding to FIGS. 8A and 8B, respectively, showing another example of the taper pin. The taper pin 42 of this embodiment is provided on the band frame 11a. Is fitted only in the tapered hole 38a of the one coupling portion 38, and the male screw portion 41c of the intermediate portion of the tightening bolt 41 is
The taper pin 42 is tightened by screwing into the screw hole 37b provided in the connecting portion 37, and the round bar portion 41d at the tip of the tightening bolt 41 is inserted into the pin hole 39b provided in the connecting portion 39 of the band frame 11a. Also in this case, the slewing wheel 17 and the band frame 11a can be joined together without rattling.

[0021]

According to the first aspect of the present invention, the swivel wheel and the band frame are provided with vertically projecting coupling portions, and these coupling portions are fitted to each other, and these coupling portions are provided by a coupling pin provided in the radial direction. Since the structure is such that it is connected, the restrictions on the mounting space and strength of the fastener size as in the past are alleviated, and it is possible to connect the swivel wheel and the band frame using a connecting pin with a relatively large diameter. Therefore, both of them can be coupled with a number of coupling pins which is a fraction of the conventional one or about one tenth, and the retaining means of the coupling pin can be constituted by a member which is relatively easily attachable and detachable. Because it does not require any special equipment for slow motion speed
The labor and time required for attaching and detaching the slewing wheel and the band frame can be significantly reduced.

According to the second aspect, since the taper pin is used as the connecting pin for connecting the turning wheel and the band frame, the turning wheel and the band frame can be connected without rattling.

According to the third aspect, since the connecting pin device is provided with the protective cylinder, damage to the connecting pin due to excavated earth and sand is prevented, and long-term use becomes possible.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing details of the connecting pin device of the embodiment of FIG.

3A is a cross-sectional view of the coupling pin device of FIG. 2,
(B) is a view of the connecting pin device as viewed from the inside of the turning wheel,
(C) is the longitudinal cross-sectional view.

FIG. 4 is a vertical sectional view showing a modified example of the embodiment of FIG.

FIG. 5 is a longitudinal sectional view showing another embodiment of the present invention.

FIG. 6A is a longitudinal sectional view showing another embodiment of the present invention,
(B), (C) is a front view and a longitudinal sectional view, respectively, showing another example of the coupling pin device of the present invention.

FIG. 7 is a vertical sectional view showing another embodiment of the present invention.

8A is a partially enlarged vertical sectional view of another embodiment of FIG. 7, and FIG. 8B is a view of the coupling pin of FIG.

FIG. 9A is a longitudinal sectional view showing another embodiment of the present invention,
(B) is the figure which looked at the coupling pin of (A) from the left side.

FIG. 10 is a half sectional side view of a conventional casing driver.

FIG. 11 is a plan view of a conventional casing driver.

[Explanation of symbols]

2: Base frame, 3: Lifting frame, 4: Thrust cylinder, 11: Band device, 11a: Band frame, 17: Swivel wheel, 17a, 17e, 17f, 18, 1
9, 28, 37 to 39: connecting portions, 17d, 18a, 19
a: pin hole, 20, 32: coupling pin, 22: coupling pin device, 23: protective cylinder, 23a, 23b: slit, 26,
35: stopper, 36: ring, 37a, 38a: taper hole, 37b, 39a: screw hole, 40, 42: taper pin, 41: tightening bolt

Claims (3)

[Claims] 1. A casing driver for transporting a slewing wheel of a casing driver and a steel pipe chuck band device mounted thereon in a divided manner, wherein an arc-shaped coupling portion is provided so as to protrude above the slewing wheel.
The lower part of the frame of the band device is provided with a downwardly projecting arcuate coupling part, and these coupling parts are fitted to each other, and a plurality of pin mounting holes that match each other are provided in these coupling parts. A casing driver characterized in that the band device is connected to the slewing wheel by arranging in a radial direction of the slewing wheel and inserting connecting pins into these holes. 2. The casing driver according to claim 1, wherein a taper pin is used as the connecting pin. 3. A connecting pin device for use in the casing driver according to claim 1, wherein a protective cylinder surrounding the connecting pin is fixed to a connecting pin mounting surface of a frame of a slewing wheel or a band device, and the protective cylinder is provided. A coupling pin device characterized in that a stopper for retaining the coupling pin is attached to the.