JPS6356398B2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention is a male joint for screws, drilling rods, stirring rods, etc. in various excavating machines such as earth augers, boring machines, agitators, horizontal boring pipe burying machines, etc. The present invention relates to a device for connecting a drilling rod body equipped with a drilling rod body to an output shaft of a drive section.

(Prior art) Conventionally, for example, in an earth auger, when digging by successively adding screws of a certain length, a new method of connecting the new screw to the output shaft of the drive unit was to push the new screw against the side of the tower. The method used is to support the screw vertically on an installed screw support and then manually connect the upper end of the single screw to the output shaft of the drive unit, but this not only takes a long time to connect, but also requires work at high places. The disadvantage was that the work was dangerous. Moreover, as an automatic coupling device for drilling rod bodies, the insertion part formed at one end of one drilling rod body is inserted into the socket part formed at one end of the other drilling rod body, and the two rods are connected to each other. Fixed teeth are respectively provided on four sides of the rectangular outer surface near one end of the other drilling rod body, and the rod is capable of engaging with the fixed teeth on the four sides in a housing fixed near one end of the other drilling rod body. The four wedge-shaped teeth spring out of the engagement and are attached to one end of each two rods, and are movable along the excavating rod body and abut and engage with the wedge-shaped teeth. four wedge-shaped sliders that are elastically ejected in a direction to engage with the fixed teeth, and each of which presses the wedge-shaped tooth portion in a direction in which the rod engages with the fixed tooth; A connecting plate is connected to the projecting end, and the cylinder device is separate from each of the above members and moves the wedge-shaped slider up and down via the rod, and also lifts the excavating rod body for connection. It has been known. However, this conventional device has four fixed teeth, four wedge-shaped teeth,
Since both excavating rod bodies are connected to each other in a state where rotation can be transmitted and cannot be removed by a joint structure consisting of four wedge-shaped sliders, etc., the device becomes a large and heavy object, and the cylinder device must be installed on the ground. Because of the large size used in the earth auger of the present invention, it is practically impossible to use this conventional device for automatically connecting the excavating rod body to the output shaft of the earth auger or the like of the present invention.

(Problems to be Solved by the Invention) The present invention provides a female coupling device in an automatic coupling device for an excavating rod body to a drive output shaft, which is lightweight and compact and can realize efficiency of coupling and separation work and prevention of danger. The aim is to provide products at low prices.

(Means for Solving the Problems) In order to achieve the above object, the present invention concentrically fixes a female joint block to the output shaft of the drive unit, and the female joint block is a prismatic male joint of the excavating rod body. It has a female joint part consisting of a square hole with an opening at one end which is to be fitted into the female joint block, and a lock member which is to be engaged with the lock groove of the male joint part which is to be fitted into the female joint part is attached to a radius of the female joint block. It is configured such that it is provided so as to be able to move forward and backward as it penetrates in the direction, and is supported by the female joint block. An example of an automatic coupling device for an earth auger will be described below with reference to the drawings.

In FIG. 1, a tower 2 connected to the front end of a crawler 1 is vertically supported and the tower 2 is connected to the front end of a crawler 1.
The auxiliary tower 3 is connected to the upper end of the auxiliary tower 3 so that the axes coincide with each other so as to be able to rotate freely.A motor 35 and a reduction gear 36 are connected to the wire 5 hanging from the top sheave 4 provided at the upper end of the auxiliary tower 3. A female coupling device A in the automatic coupling device of the present invention is attached to an output shaft 7 protruding from the lower surface of the drive portion 6. The output shaft 7 is appropriately displaced forward from the axis of the motor 35 and supported by a gear box 47, and rotation is transmitted from the drive shaft of the reduction gear 36 via gears 37 and 38. The upper end protrudes upward from the gear box 47, and a swivel 40 is attached to the protruding end to force feed cement milk or the like into a through hole 39 (FIG. 2) extending vertically through the output shaft 7. 8, 8 are guide rods provided on the front of the tower 2 over the entire length of the tower, 8', 8' are guide rods similarly provided on the auxiliary tower 3,
When the auxiliary tower 3 swings back and forth, its guide rods 8', 8' are in continuous or separate relationship with the guide rods 8, 8 of the tower 2. 9, 9 are slide fittings of the drive unit 6, and guide rods 8, 8 or 8',
8'. Reference numerals 10 and 11 designate single screw supports protruding from one side of the upper and lower parts of the tower 2.

The structure of the female coupling device A in the automatic coupling device is as follows. In FIG. 2, a flange cap 12 is fixed concentrically to the protruding lower end of the drive unit output shaft 7, and a female joint block 1 having a flange portion 14 at the upper end is attached to the lower surface of the flange cap.
3 at its flange portion 14 with bolts 15...,
They are connected by nuts 16 with their axes aligned.

The female joint block 13 has a female joint part 18 formed at the axial center of its substantially rectangular cylindrical body 17, which is a hole with a regular hexagonal cross section that opens on the lower surface, and has boxes on both left and right sides of the body 17. 19, 19 are arranged in series, and through holes 20, 20 having a rectangular cross section are formed in the side wall of the main body 17, and penetrate from the inside of the boxes 19, 19 into the female joint part 18 in the radial direction. Rectangular parallelepiped lock piece 2 inside the hole
1 and 21 are fitted together so that they can move forward and backward in the radial direction.
The through holes 20, 20 are open to opposing flat inner surfaces of the female joint portion 18 having a regular hexagonal cross section,
Further, the lock pieces 21, 21 have lock keys 22, 22 formed of protrusions having a semicircular cross section protruding along the cross section of the female joint portion 18 on their tip surfaces. 4
Reference numeral 1 denotes a through hole that communicates with the through hole 39 of the output shaft 7 and opens into the female joint portion 18 .

On the other hand, at the upper end of the single screw unit 23 to be connected to the drive unit output shaft 7, there is provided a male joint part having the same structure as a conventionally used male joint part and having a regular hexagonal cross section that can be fitted with the female joint part 18. A male joint part 24 made of a prismatic body is provided protrudingly with the axes aligned, and on the opposite flat outer surface of the male joint part 24,
Lock grooves 25, 25 having a semicircular cross section are formed along the cross section of the male joint part 24 as locked parts corresponding to the lock keys 22, 22. 42
is a through hole extending vertically through the screw unit 23.

The lock pieces 21, 21 are connected to the female joint part 18.
The driving means for moving the lock piece 21 inwards and backwards is as follows for one lock piece 21. A lock piece driving hydraulic cylinder 27 is swingably supported on a bracket 26 fixed to the lower surface of the flange portion 14 of the female joint block 13, while a bracket 28 provided on the outside of the lock piece 21 in the box 19, One end of the L-shaped lever 29 is swingably supported by a shaft 30, and one end of a link 31 is swingably connected to the bent part of the lever 29 by a shaft 32.
The other end of the shaft 3 is attached to the rear end of the lock piece 21.
3, and a ram 27' of the cylinder 27 is connected to the other end of the L-shaped lever 29.
are connected by a shaft 34, and when the cylinder 27 is driven to move the ram 27' forward and backward, the lever 29 swings up and down about the shaft 30, and the chain of the lever 29, link 31, and lock piece 21 is rotated as shown in the second figure. The lock piece 21 is bent and extended in this manner, thereby moving the lock piece 21 forward and backward into the female joint portion 18. In this case, by making the height of the shaft 30 of the lever 29 from the bottom surface of the box 19 slightly higher than that of the shaft 33 of the lock piece 21, as shown in the third figure, the center of the shaft 32 is aligned with the shaft 30 when the chain is extended. and 33, that is, beyond the dead center and below the dead center, thereby preventing the chain from bending. The drive means for the other lock piece are also substantially the same as described above.

Hydraulic cylinders 27, 27 of the lock driving means
The piping for supplying and discharging pressure oil is as follows. In Figures 2 and 4, the female joint block 13
An oil supply hole 43 and an oil discharge hole 44 are formed which extend upward from the outer surface of the block 13 and into the output shaft 7 in parallel with the through hole 39.
A supply pipe 45 and a discharge pipe 46 connected to the hydraulic cylinders 27 and 27 are connected to the openings on the outer surface of the female joint block 13 at 3 and 44, respectively, while the output shaft 7 protrudes upward from the gear box 47. At the lower part of the swivel 40, the outer cylinder 48 is fitted via bearings 49, 49, and the outer cylinder 48 is attached to the gear box 47 by bolts 5.
0..., and annular grooves 51 and 52 are formed on the inner peripheral surface of the outer cylinder 48, and these annular grooves 5
The supply and discharge holes 43 and 44 are opened at positions connected to the outer cylinder 48 and the outer cylinder 48.
, holes 53 and 54 communicating with the annular grooves 51 and 52
An oil supply pipe 55 connected to a hydraulic system and an oil discharge pipe 56 are connected to the hole to form an oil supply and discharge swivel 57.

In addition, in the swivel 40 shown in FIG. 4, 58 is a rotary cylinder fixed with its axis aligned with the upper end of the output shaft 7, 59 is a support stand fixed to the upper end of the outer cylinder 48, and 60 is the rotary cylinder fixed to the upper end of the output shaft 7. The support stand 59 is relatively rotatably inserted into the tube 58 and
A fixed tube fixedly supported by the output shaft 7, the lower end of which is fixedly supported by the output shaft 7.
The upper end is connected to a supply device for cement milk or the like through a pipe 61.

The operation of this device will be explained below along with the screw replenishment work. When adding screws, first, a new screw unit 23 is lifted by a crane and supported by the screw supports 10 and 11. Next, the drive unit 6 is separated from the preceding screw in the ground and raised to the position of the auxiliary tower 3, where the auxiliary tower 3 is rotated 90 degrees and the female coupling device A is positioned directly above the new single screw 23. let Next, the drive unit 6 is lowered by operating the wire 5, and the female joint part 18 is fitted into the male joint part 24 at the upper end of the screw unit 23. Next, when the pair of lock pieces 21, 21 are advanced by driving the hydraulic cylinders 27, 27, the lock key 2
2 and 22 are lock grooves 25 and 25 of the male joint part 24
The male and female joints 24 and 18 are locked by engaging with each other. After the above-mentioned locking, the screw supports of the supports 10 and 11 are released, the auxiliary tower 3 is rotated to its original position, the drive section 6 with the new screw unit 23 connected is returned to the front side of the tower, and then the drive section 6
is lowered to connect the lower end of the new single screw 23 to the upper end of the previous screw.

When separating the male and female joints 24 and 18, the lock pieces 21 and 21 are moved backward by driving the hydraulic cylinders 27 and 27, and the lock key 2 is
2 and 22 from the lock grooves 25 and 25.

The means for driving the lock pieces 21, 21 forward and backward is not limited to the above example, and may be other various means such as a solenoid.

(Effects of the Invention) According to the female joint device of the automatic coupling device of the excavating rod body to the output shaft of the present invention, the male joint portion of the excavating rod body can be fitted into and removed from the female joint portion and the locking member driving means can be driven. The drilling rod body can be connected to and separated from the output shaft reliably and efficiently, and the need for dangerous work of connecting at a high place as in the past can be eliminated. Rotation transmission is shared by the square hole-shaped female joint, and the role of preventing the excavation rod from coming off is shared by the locking member, and the locking member is provided in the female joint block in the radial direction of movement. , the entire locking member and locking member driving means are small and lightweight;
Therefore, when the device of the present invention is used in a drive unit supported by a high support arm such as a mast or boom in an earth auger or boring machine, sufficient stability can be ensured, and it can also be used in a narrow pit in a horizontal pipe burying machine. When the device of the present invention is used in a pipe burying machine, it does not take up extra installation space and can be freely used for various excavating machines. Another advantage is that the drilling rod body having the prismatic male joint part can be used as is.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view of the earth auger, FIG. 2 is an enlarged vertical sectional view of a portion of the coupling device, FIG. 3 is an enlarged view of the lock piece drive link, and FIG. 4 is an enlarged view of the lock piece drive link. is an enlarged vertical cross-sectional view of the swivel portion. 7...Output shaft, 13...Female joint block, 1
8...Female joint part, 21...Lock piece, 22
...Lotsuku key, 23... Screw, 24...
Male joint part, 25...Lock groove, 27...Hydraulic cylinder.

Claims (1)

[Scope of Claims] 1. A female joint block is fixed concentrically to the output shaft of the drive unit, and the female joint block has a rectangular hole with one end opening to be fitted with a prismatic male joint portion of the drilling rod body. A lock member having a joint part and to be engaged and disengaged from the lock groove of the male joint part to be fitted into the female joint part is provided so as to be freely movable forward and backward through the female joint block in the radial direction, and the lock member is moved forward and backward. A female coupling device in an automatic coupling device for an excavation rod body to an output shaft, the female coupling block having a drive means for causing the excavation rod body to be supported by the female coupling block.