JPH086547B2 - Rod changer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rod exchanging device. More specifically, the present invention relates to a simple boring rod exchanging device that can quickly and easily perform a boring rod connecting operation at the time of excavation by a boring machine and a boring rod separating operation at the time of pulling out with a small amount of labor.

[0002]

2. Description of the Related Art In a boring machine, a boring rod generally transmits rotation and thrust of a spindle to a bit,
It plays the main role of leading the drilling water to the bit. Therefore, a large number of boring rods are sequentially connected as the boring rod progresses, and conversely, when the boring rod is pulled out, they are separated one by one.

Conventionally, the connecting / disconnecting work of such a boring rod is often performed manually by an operator. That is, in the case of vertical boring, for example, the boring rod is manually transported from a predetermined place to below the main spindle, and then vertically oriented at that position to be connected to the preceding boring rod and the main shaft.

Although the length of one boring rod tends to be shortened in recent years in order to reduce the weight, the weight is still relatively large, and the connecting / disconnecting work by an operator requires a great deal of labor. In particular, it is not easy to align the center with the preceding boring rod and the main shaft. For this reason, a rotary magazine type automatic connecting / disconnecting device for boring rods has been proposed, but it is not only expensive as an auxiliary equipment of a boring machine, but also less useful when the length of excavation is short. Therefore, it has been desired to develop a simple device for connecting / disconnecting the boring rod.

[0005]

The present invention has been made based on the above technical background, and achieves the following objects.

An object of the present invention is to provide a simple rod exchanging device capable of saving labor in connecting / disconnecting rods.

Another object of the present invention is to provide a rod exchanging device capable of shortening the time for connecting and disconnecting the rod and ensuring safety.

[0008]

The present invention adopts the following means in order to achieve the above object.

That is, the present invention comprises a frame (1),
A boring machine or the like having a main shaft (7) for rotating a rod, and a rotary drive mechanism (4) provided on the frame (1) so as to be movable in the axial direction of the main shaft (7), The frame (1) is swingably provided between an angular position that forms an angle with the axis (C) of the main shaft (7) and a parallel position that is substantially parallel to the axis (C) of the main shaft (7). Arm (11), gripping means (15, 18) for supporting and clamping the rod on the arm (11) along its length, and the arm (11)
Is in the parallel position, the axis of the rod supported by the arm (11) and the axis (C) of the main shaft (7).
The rod exchanging device is characterized in that and are configured to substantially coincide with each other.

It comprises arm driving means (14) for driving the arm (11) and driving means (18a) for driving the gripping means (18).

The arm (11) comprises a movable base (30) movably provided along the longitudinal direction of the arm (11) and a driving means (32) for driving the movable base (30). Means (15, 18) are provided on the movable base (30).

The rod comprises a double tube of an inner tube and an outer tube, and is moved in a radial direction of the rod to prevent the inner tube from coming out of the outer tube when the arm (11) is rocked. It is composed of a stopper (19) provided freely on the swing center side of the arm.

[0013]

The rod has a gripping means (1) provided on the arm (11).
5, 18) is supported on the arm (11) and clamped. When connecting the rod, the arm (11) is rotated from the angular position to the parallel position, and when disconnecting, the arm (1) is rotated.
1) is rotated from the parallel position to the angular position.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

First Embodiment FIG. 1 is a front view showing a power swivel type boring machine in which the exchanging device of the present invention is incorporated, and FIG. 2 is a side view of the boring machine shown in FIG.

The frame 1 has a base 1a and a swing cylinder 1
It is provided so as to be rotatable in a vertical plane via b. Although the frame 1 is installed in the vertical direction in this embodiment, it is for excavating a vertical hole in the ground, and may be installed in the horizontal direction or inclined. In frame 1,
A punching device 2 is movably mounted via a traveling frame 3. The punching device 2 is moved in the axial direction of the main shaft 7 by driving a feed chain (not shown).

In this embodiment, the punching device 2 is of a type including a rotary drive device 4 and a vibrating device 5. That is, the spindle 7 to which the boring rod B is connected
Is connected to the vibration oscillating device 5 via a coupling 8, and the main shaft 7 is provided with a rotational force generated by driving the drive motors 6 and 6 and an axial vibration generating force generated by driving the vibration generating device 5. It Details of the punching device 2 are shown in Japanese Patent Application No. 4-351823 proposed by the present applicant.

The boring rod exchanging device 10 is provided near the tip of the frame 1 (the lower end in the state shown in FIGS. 1 and 2). The exchange device 10 has an arm 11. One end of the arm 11 is fixed to a shaft 13, and the shaft 13 is pivotally supported by a bracket 12 provided on the frame 1. As a result, the arm 11 swings between a right-angled position (state of FIG. 1) substantially perpendicular to the axis C of the main shaft 7 and a parallel position parallel to the axis C. The hydraulic cylinder 14 is a cylinder for swinging the arm 11 around the shaft 13.

The arm 11 is provided with two support plates 15, 15 for supporting the boring rod B at a distance. The support plates 15 and 15 have an arc portion 17 whose radius of curvature is substantially the same as the peripheral surface of the boring rod B (see FIG. 3).
And the boring rod B is supported at the circular arc portion 17. The arc portion 17 is detachably attached to the support plate 15. Then, various arc portions 1 having different radii of curvature
By preparing 7, the axis of the boring rod B can always be kept in the same position even if the outer diameter of the boring rod B is different. With the boring rod B set in the arm 11, the offset amount r of the boring rod B from the axis O of the shaft 13 is equal to the offset amount r of the shaft 13 from the axis C.

As shown in FIG. 3, one end of a clamp member 18 is pivotally supported by the arm 11 between the support plates 15 and 15, and the clamp member 18 is held between a grip position for gripping the boring rod B and a release position for releasing it. Can be swung freely. The hydraulic cylinder 18a is a cylinder for swinging the clamp member 18.

When the boring rod B is a double pipe,
It is necessary to prevent the inner tube from coming out when the arm 11 swings. As shown in FIG. 4, a stopper 19 for this purpose is arranged on the swing shaft 13 side of the arm 11. The stopper 19 is provided on the rod of the pneumatic cylinder 20.
A long hole 21 is formed in the stopper 19, and a pin 23 provided on a bracket 22 for mounting the pneumatic cylinder 20.
Is inserted into the long hole 21. The stopper 19 is guided by the elongated hole 21 by the operation of the pneumatic cylinder 20, moves in the radial direction of the boring rod B, and supports the inner pipe.

As shown in FIG. 5, a swinging portion 11a is swingably provided at the tip of the arm 11 via a hinge 24. The hydraulic cylinder 25 is a cylinder for rocking the swinging part 11a.

Operation of the First Embodiment The operation of the above-described embodiment will be described by taking the case of connecting the boring rod as an example.

During excavation, the boring rod B is set on the arm 11 in preparation for connection work. That is, both ends of the boring rod B are supported by the support plates 15 and 15, and the middle portion is clamped by the clamp member 18.

When the excavation of one length of the boring rod B is completed, the connecting work is performed. The arm 11 is rotated by the operation of the hydraulic cylinder 14, and the arm 11 moves to a position parallel to the axis C of the main shaft 7. In this state, the axis of the boring rod B substantially coincides with the axis C. When the boring rod B is a double pipe, the inner pipe is supported by the stopper 19, so that it does not fall out of the outer pipe when the arm 11 rotates.

When the axis of the boring rod B is deviated from the axis C, the hydraulic cylinder 25 is operated and the swinging portion 11a is appropriately swung. Since the tip of the boring rod B also swings as the swinging portion 11a swings,
The axial position can be adjusted. Since the boring rod B is clamped by the pneumatic cylinder 18a, the boring rod B is prevented from rotating due to the swinging of the tip and an unreasonable force is applied to the boring rod B.

The preceding boring rod is fixed to a chuck device 25 provided at the tip (lower end in FIGS. 1 and 2) of the frame 1 at the time of connecting work. One end of the boring rod B supported by the arm 11 is connected to the preceding boring rod, and the other end is connected to the main shaft 7. The boring rod B is connected by moving the boring device 2 and rotating the main shaft 7. After connecting the boring rod B, release the clamp and
Return 1 to the right angle position.

The operation of separating the boring rod is performed in the reverse order of the above operation.

Second Embodiment FIG. 6 is a front view of a second embodiment of the present invention, and FIG. 7 is a side view.

The arm 11 is provided with a movable base 30 slidably in the longitudinal direction thereof. The movable base 30 is made of channel steel. The movable base 30 includes two gate-shaped guides 31, 31 fixed to the arm 11 at a distance.
Move to be guided by. The movable base 30 is driven by a hydraulic cylinder 32.

The oscillating portion 11a is for adjusting the axial position of the boring rod as in the above-described embodiment, but in this embodiment, the oscillating portion 11a and the movable base 30 are arranged.
A tension spring 33 is provided between the tension spring 33 and the tip. A stopper 34 is provided on the swing portion 11a, and the stopper 34 rides on and engages with the dog 35 provided on the arm 11, whereby the swing portion 11a swings around the pin 24, and accordingly, the boring rod also moves. Rock. By adjusting the moving amount of the movable base 30, specifically, by adjusting the amount of the stopper 34 riding on the dog 35, the swing amount can be adjusted. Other,
The same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Operation of the Second Embodiment The operation of the second embodiment will be described with reference to FIGS. 8 and 9.

Similar to the first embodiment, the boring rod is a double pipe consisting of a casing 40 which is an outer pipe and a rod 41 which is an inner pipe. First, the casing 40
Of the stopper 19 (Fig. 8)
(A)), The casing 40 is set to the support plates 15 and 15 (FIG.8 (b)). Next, insert the rod 41 into the casing 4
It is inserted in 0 (FIG. 8 (c)). Also, the clamp member 1
8 is operated to fix the casing 40 to the arm 11 (FIG. 8 (d)).

Next, the hydraulic cylinder 14 is operated and the arm 11 is rotated so that the axis of the casing 40 and the axis of the main shaft 7 are aligned (FIG. 8 (e)). Next, the stopper 19
(Fig. 8 (f)). This makes the rod 4
1 descends.

Next, the hydraulic cylinder 32 is operated to lower the movable base 30 (FIG. 9 (g)). Along with this, the casing 40 descends, and the upper end of the rod 41 projects from the casing 40. Next, the main shaft 7 descends and rotates (FIG. 9 (h)). The rotation of the main shaft 7 connects the rod 41 to the main shaft 7 and also connects the rod 41 to the preceding rod.

Next, the movable base 30 is raised (see FIG. 9).
(I)). Along with this, the casing 40 rises and is connected to the rotating main shaft 7. Next, the clamp member 1
8 is opened (FIG. 9 (j)), the hydraulic cylinder 14 is further operated, and the arm 11 is returned to the horizontal position (FIG. 9).
(K)). In this way, the rod 41 and the casing 40 are connected to the main shaft 7, and by lowering the main shaft 7 while rotating the main shaft 7, the casing 40 is connected to the preceding casing and excavation is performed (FIG. 9).
(L)) Other Embodiments In the above embodiment, the support member and the clamp member are provided separately, but they may be provided integrally. That is, the support member may have a clamping function.

Further, although the present invention is applied to the boring machine in the above embodiment, it can be applied to the injection of the ground improvement material. In short, the present invention can be applied to any device that penetrates into the ground or pulls it out while sequentially connecting the boring rods B. Further, although the hydraulic cylinder 14 is provided to rotate the arm 11 in the above-described embodiment, the hydraulic cylinder 14 does not necessarily have to be provided. In this case, although the arm 11 is manually rotated, a great labor saving can be achieved as compared with the case where the boring rod B is manually held vertically and connected.

Further, the hydraulic cylinder 18a for driving the clamp 18 does not necessarily have to be provided, and a clamp using an ordinary clasp may be used. In addition, the present invention can be variously modified.

[0039]

As described above in detail, according to the present invention, it is possible to save the labor of connecting / disconnecting the rod and shorten the time.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is a side view of the embodiment shown in FIG.

FIG. 3 is a front view of a clamp means.

FIG. 4 is a front view of a stopper.

FIG. 5 is a front view of a swinging portion.

FIG. 6 is a front view showing a second embodiment.

FIG. 7 is a plan view of the second embodiment.

FIG. 8 is a front view showing the operation of the second embodiment.

FIG. 9 is a front view showing the operation of the second embodiment.

[Explanation of symbols]

 1, 11 ... Arm 2 ... Drilling device 4 ... Rotation drive device 7 ... Main shaft 14 ... Hydraulic cylinder 15 ... Support plate 18 ... Clamp 18a ... Pneumatic cylinder 19 ... Stopper 30 ... Movable base

Claims (4)

[Claims] 1. A rotary drive mechanism (4) which has a frame (1) and a main shaft (7) for rotating a rod, and is provided on the frame (1) so as to be movable in the axial direction of the main shaft (7). ) In a boring machine or the like, the angle position that forms an angle with the axis line (C) of the main shaft (7) and the parallel position that is substantially parallel to the axis line (C) of the main shaft (7). An arm (11) swingably mounted on the frame (1), and gripping means (15, 18) for supporting and clamping the rod on the arm (11) along the length direction thereof.
And when the arm (11) is in the parallel position, the axis of the rod supported by the arm (11) and the axis (C) of the main shaft (7) are substantially aligned. A rod exchanging device characterized in that 2. The arm driving means (14) for driving the arm (11) and the driving means (18) for driving the gripping means (18) according to claim 1.
A rod exchange device comprising a) and a). 3. The movable base (30) according to claim 1 or 2, wherein the movable base (30) is movably provided along the longitudinal direction of the arm (11), and drive means for driving the movable base (30). (3
2), wherein the gripping means (15, 18) is the movable base (30).
Rod exchange device installed in. 4. The rod according to claim 2 or 3, wherein the rod comprises a double tube of an inner tube and an outer tube, and prevents the inner tube from coming out of the outer tube when the arm (11) swings. And a stopper (19) provided on the swing center side of the arm so as to be movable in the radial direction of the rod.