JPH0475996B2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention is directed to pressing a main pipe such as a hume pipe from a starting pit dug in the ground toward a destination pit in order to bury the main pipe underground. This relates to a propulsion device for propulsion.

(b) Prior art and problems to be solved Conventionally, propulsion devices for pressing and propelling main pipes such as Huum pipes to be buried underground have been constructed using a starting device dug into the ground, as shown in the plan view of Figure 7. Within anti-1,
A propulsion platform 7 is mounted, which is formed by connecting two box-shaped guide rails 3 and 5 arranged side by side on the left and right in the propulsion direction.
At the front and rear ends of each of the guide rails 3, 5, extendable jacks 9, 9, . Propulsion platform 7
A hydraulic control device 15 is installed at the rear of the vehicle.
A hydraulic main cylinder 19 is fixed in a longitudinal position on a jack stand 17 which is suspended from the guide rails 3 and 5 on both sides and is movable in the longitudinal direction, and has a slidable piston (not shown) inside. A piston rod 21, which is integrally fixed, extends forward and retractably, and a pushing body 23 for propulsion is detachably fixed to the front end. In front of the jacking stand 17, a support stand 25 is provided which is slidably suspended in the front and back direction on the guide rails 3 and 5 on both sides, and the support stand 25 has rollers etc. that hold the main pipe 27 such as a fume pipe. A supporting device 29 is provided. Pins 31 that engage with pin holes (not shown) are removably provided at both ends of the jack stand 17 and the support stand 25, and are engaged with locking holes 33 provided in the guide rails 3 and 5 to allow the jack to be moved. The stand 17 and the support stand 25 are fixed at appropriate positions. In propelling the Huyum tube 27, the Huyum tube 2
The pressing body 23 is brought into contact with the rear end of the holder 7, and placed on the support stand 25. When the main cylinder 19 is extended by hydraulic pressure, the pressing body 2 at the tip of the piston rod 21
3, the hume tube 27 is propelled.
Next, insert the pin 31 of the jack stand 17 into the locking hole 33.
The cylinder 19 is contracted by switching the oil pressure, the jack table 17 is pushed forward by hand, the pin 31 is locked in the front locking hole 33, and the hume tube 27 is moved forward. By repeating this operation, when the rear end of the fume tube 27 reaches the front end of the propulsion base 7, remove the pin 31, push the jack base 17 back to the rear end position by hand, and at that position, lock the locking hole 33.
, and insert the next hume tube 27 between the rear end of the hume tube 27 and the pressing body 23 .
By connecting the cylinders 19 and repeating the expansion and contraction of the cylinder 19 as described above, the hume tube 27 is propelled. In this conventional device, the main cylinder 19 is expanded and contracted, and as the fume tube 27 is propelled, the jack table 17 to which the main cylinder 19 is attached must be moved forward and locked repeatedly. When locking, it is necessary to lock and release the pin each time, which is a troublesome operation and is not favorable in terms of work efficiency.

To solve this problem, devices shown in FIGS. 8 and 9 can be considered as an alternative to the conventional example shown in FIG. 7.

That is, FIG. 8 is a simplified plan view of the main parts, in which the jack stand 65 is connected to the hydraulically operated main cylinder 6.
A pressing body 69 is provided at the tip of the piston rod 67 of the main cylinder 63 for pressing the humid pipe 27, and a main chuck device 78 is fixedly provided on the jack stand 65, and this main chuck device 78 is mounted in parallel. The guide rods (corresponding to guide rails) 51 and 53 are removably locked by hydraulic operation. As a result, the troublesome work of engaging and disengaging the pin shown in FIG. 7 can be omitted.

Further, FIG. 9 shows a similar plan view, in which the main cylinder 63 of FIG. 8 is eliminated and a front movable cylinder 81 integrated with the main chuck device 78 is used to perform the function of the main cylinder. A press base 127 is fixed to the tip of the piston rod 113 of the main cylinder (moving cylinder) 81.
A pressing body 69 for pressing the fume pipe 37 is fixed to the holder. In this case as well, the guide rod 53 is provided parallel to the main cylinder (moving cylinder) 81. The arrangement shown in FIG. 9 also allows the troublesome work of engaging and disengaging the pins described above to be omitted.

However, in the proposals shown in FIGS. 8 and 9, since the guide rods 51 and 53 are engaged and disengaged only by the main chuck device 78,
There are problems in terms of operation and device configuration.

That is, in the case of FIG. 8, when the main cylinder 63 is moved forward, the main chuck device 78 engages and disengages by hydraulic operation.
In order to move the main chuck device 78, the operator has to manually push it forward, which is cumbersome, and in the case of the one shown in FIG. Therefore, there is a problem that the structure of the chuck device becomes complicated, and it is not sufficient to have a simple structure.

SUMMARY OF THE INVENTION Therefore, the present invention aims to provide a propulsion device that can omit the troublesome work of engaging and disengaging pins for forward movement of the propulsion device, and can also avoid operational and structural insufficiencies. .

(c) Means and operation for solving the problem In order to achieve the above object, in the first invention according to claims 1 to 3, a propelled object is attached to the tip of the piston rod 67 of the main cylinder 63 which is pressed by hydraulic operation. A main chuck device 78 is provided on the main cylinder 63, and a main chuck device 78 is provided with a pressing body 69 for pressing the main cylinder 63, and a main chuck device 78 that releasably locks the guide rods 51, 53 provided in parallel to the main cylinder 63 in a hydraulically operated manner. An auxiliary chuck is fixed to the piston rod 113 of the movable cylinder 81 integrally attached to the main chuck device 78, and is removably engaged with the guide rods 51, 53 by hydraulic operation. The propulsion device is characterized in that the device 115 is integrally installed and provided, and in the second invention of claims 4 to 6, the tip of the piston rod 67 of the main cylinder 63 which is pressed by hydraulic operation. A main chuck is provided with a pressing body 69 for pressing a propelled object via a pressing table 127, and is removably engaged with guide rods 51 and 53 provided in a direction parallel to the main cylinder 63 by hydraulic operation. The device 78 is connected to the main cylinder 6
3 through a jack stand 65, and an auxiliary chuck device 115 is integrally attached to the pressing stand 127 and detachably locks the guide rods 51, 53 by hydraulic operation. This propulsion device is characterized by:

The present invention thereby facilitates both the pressing of the propelled object by the main cylinder and the forward movement of the propulsion device by the engagement and disengagement action of alternately releasing and fixing the hydraulic pressure of the main chuck device and the auxiliary chuck device. This can be done with a simple device.

(d) Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 to 5, the propulsion device 35 for a main pipe such as a humm pipe for underground burial is constructed as follows. A starting shaft 39 and a reaching shaft 41 are dug at both ends of the ground where a main pipe (in this embodiment, a humid pipe) 37 as a propelled object is to be buried. In the starting resistor 39, the propulsion device 35 is held on the bottom surface by jack legs 43, 43, and the jacks 45, which are extendable and retractable, are attached to the front and rear side walls.
45, . . . are fixed via backing members 47, 49. The propulsion device 35 connects two guide rods 51 and 53 arranged in parallel on both sides in the propulsion direction with a connecting member 5.
5 and 57 are connected at the front and rear, respectively. A hydraulic controller 59 is provided on the top surface of the connecting member 57.
is placed thereon, controls the hydraulic pressure of the hydraulic pressure generation source 61 on the ground, and sends the hydraulic pressure to the main cylinder 63 and the like. The cylinder 63 is fixed to a jack stand 65 which is suspended from guide rods 51 and 53 on both sides and is movable in the front and back direction, and a piston rod 67 which is fixed integrally with a piston (not shown) which is slidable inside is fixed. It protrudes forward in a telescopic manner, and a pushing body 69 for propulsion is detachably fixed to the front end. In front of the jack stand 65 are guide rods 5 on both sides.
1, 53 is provided with a support stand 71 which is suspended so as to be able to move back and forth in the front and rear directions, and on the support stand 71, a support device 73 equipped with rollers and the like for holding a propelled object such as the hume tube 37 can be freely adjusted up and down by hydraulic pressure. It is set in. The support device 73 includes a pilot head 75, a pilot pipe 76, an excavation head 77, which are sequentially propelled.
The vertical position is adjusted according to the outer diameter of the hump tube 37, etc., and the pressing body 69 is attached to the pilot head 7 described above.
5 or the like is formed according to the shape of the rear end of the propelled object, and is replaced as appropriate. At both ends of the jack stand 65, main chuck devices 78 are movably and fixedly engaged with the guide rods 51 and 53.
is integrally fixed to the main cylinder 63 via a jack stand 65. The main chuck device 78 is constructed as follows. That is, the chuck cylinders 79 fixed to both ends of the jack stand 65 are integrally formed with the movable cylinder 81 at the front. An annular chuck piston 8 is disposed within the chuck cylinder 79 and can be reciprocated in the axial direction by hydraulic pressure.
3 is provided, and reciprocating motion is achieved by switching and feeding pressure oil from oil passages 85 and 87 provided in the chuck cylinder 79 at the front and rear positions. The chuck piston 83 is held in a neutral position by bullets 89 and 91 provided at both ends.
An annular chuck body 93 is engaged with the inner diameter of the chuck piston 83 and reciprocates together with the chuck piston 83. The chuck body 93 is divided into three parts in the inner circumferential direction, and has inclined surfaces 9 provided at the front and rear outer circumferential ends.
5 and 97 are in contact with inclined surfaces 103 and 105 formed on the inner diameter of inclined rings 99 and 101 that fit into the front and rear parts of the chuck cylinder 79, respectively;
The chuck body 93 is pressed and fixed to the outer peripheral surface of the guide rod 51 passing through the inner diameter. check 9
An uneven surface 107 is formed on the inner diameter surface of the chuck body 93, and an annular bullet 109 urges the chuck body 93 to spread outward. Moving cylinder 81
A piston 111 is slidably fitted inside the piston 111.
An auxiliary chuck device 115 is attached to the front end of a cylindrical piston rod 113 integrally formed in front of the piston 111. Since the auxiliary chuck device 115 has the same structure as the main chuck device 78, detailed description thereof will be omitted here. The piston 111 is slidably fitted into the outer periphery of an inner cylinder 117 whose one end is fixed to the bottom of the movable cylinder 81.
It is sealed by a seal 119. The movable cylinder 81 communicates with oil passages 121 and 123 for supplying pressure oil to chambers formed in front and rear of the piston 111, respectively. The pilot head 75 is pushed forward by the pushing body 69 of the propulsion device 35, and the small-diameter pilot tube 76 is pushed forward by the jack or rotary blade at the tip by hydraulic pressure.
A hole with the same diameter as the hole is excavated, and a pilot pipe 76 is later connected to push the hole to the reaching shaft 41, as shown in FIG. Once the pilot tube 76 penetrates,
Next, an excavation head 77 equipped with a hydraulic rotary blade of the same diameter as the larger fume pipe 37 is connected to the rear end of the pilot pipe 76 and pushed forward, and as shown in FIG. The fume tubes 37 are successively connected and pushed forward to the reaching shaft 41, and finally the hume tube 37 is buried between the starting shaft 39 and the reaching shaft 41.

In the above embodiment, in order to propel a propelled object such as the fume tube 37, a pressing body 69 corresponding to the propelled object is attached to the tip of the piston rod 67 and comes into contact with the rear end of the propelled object. At the same time, the support device 73 is adjusted to an appropriate height to maintain the appropriate position of the propelled object. Next, when pressure oil is sent to the oil passage 87 of the main chuck device 78, the chuck piston 83 moves to the left in FIG. The main chuck device 78 is pressed against the guide rod 5.
It is fixed at 1,53. In this case, when a load is applied to move the main chuck device 78 to the right in FIG. 5, the inclined surface 103 presses against the inclined surface 95, so that the main chuck device 78 is more securely fixed. Next, when hydraulic pressure is applied to the main cylinder 63, the piston rod 67 expands, pushing the object to be propelled to the left and propelling it. Next, the oil pressure is switched to retract the piston rod 67. The auxiliary chuck device 115 is moved to the left in FIG. 4 along with the piston rod 113 extending by supplying oil to the oil passage 123. At this time, the hydraulic pressure of the chuck piston 83 of the auxiliary chuck device 115 is released and the ammunition 89, 9
1, the neutral position is set, and the auxiliary chuck device 115 is released. Next, the pressure oil in the main chuck device 78 is released to release the fixation between the main chuck device 78 and the guide rods 51, 53, and the pressure oil is sent to the oil passage 87 of the auxiliary chuck device 115 to release the guide rod 115. 51 and 53, and when pressure oil is sent to the oil passage 121 to contract the piston rod 113, the main chuck device 78 moves to the left in FIG.
At the position where the pressing body 69 abuts the rear end of the propelled body,
Pressure oil is sent to the oil passage 87 of the main chuck device 78 to fix the main chuck device 78 to the guide rods 51 and 53. Repeat the above operation to press the propelled object,
It is something that promotes this. Further, by operating the main chuck device 78, the auxiliary chuck device 115, and the moving cylinder 81 in the reverse order to that described above, the jack table 65 can be moved to the right in FIG. It is also possible to sequentially link these operations.

FIG. 6 is a plan view showing the configuration of an embodiment in which the main parts are simplified, and (A) shows the embodiment of the first invention.

(B) shows an embodiment of the second invention, and this embodiment
The moving cylinder 81 in (A) is eliminated, and the main cylinder 63 also serves as the moving cylinder 81.
The auxiliary chuck device 115 is integrally attached to the piston rod 67 of the movable cylinder 81 (main cylinder 63), which is fixed to the main chuck device 78 and the jack stand 65, via a press base 127 to which the press body 69 is fixed. It is installed. That is, the first
The function of the piston rod 113 in the embodiment shown in FIG.
This is achieved by 7.

The operation of the embodiment of the second invention is as follows. That is, when hydraulic pressure is applied to the main cylinder 63 with the main chuck device 78 fixed and the auxiliary chuck device 115 released, the piston rod 6
7 expands, and the hume tube 37 is propelled via the press base 127 and the press body 69. At this time, the auxiliary chuck device 115 also moves forward. Next, the auxiliary chuck device 115 is fixed, the main chuck device 78 is released, and the oil pressure of the main cylinder 63 is switched.
The main cylinder 63, jack stand 65 and main chuck device 78 move forward relative to the piston rod 67, and the piston rod 67 returns to its original contracted state. This repetition causes the propulsion device to move forward.

(e) Effects of the invention Since the present invention has the configuration as described in the claims, the propelling operation of the propelled object can be performed extremely easily, and the structure can be simple and compact. Moreover, the propulsion device can be reliably locked in any position.

In the above embodiment, the auxiliary chuck device is provided in front of the main chuck device, but in the present invention, it may be provided at the rear. Further, although the main chuck device and the auxiliary chuck device use an annular chuck piston through which a guide rod passes through, a cylinder having a separate ordinary piston outside the guide rod may be used. Alternatively, the divided chuck body may be pressed and fixed to the guide rod by an inclined ring or an integral inclined portion that reciprocates integrally with the chuck piston. Further, the chuck body may be fixed to the guide rod by a locking piece, a locking pin, etc. operated by hydraulic pressure.

[Brief explanation of the drawing]

Fig. 1 is a side view of the embodiment of the first invention, Fig. 2 is a side view of another state, Fig. 3 is a plan view, Fig. 4 is a side sectional view of the main part, and Fig. 5 is a side view of the main part. An enlarged side sectional view, FIG. 6 is a plan view showing an embodiment of the first invention and an embodiment of the second invention with main parts simplified, FIG. 7 is a plan view of a conventional example, and FIGS. 8 and 9. 1 is a plan view of an alternative to the conventional example in which main parts are simplified; FIG. 51, 53...Guide rod, 63...Main cylinder, 67...Piston rod, 69...Pushing body, 78...Main chuck device, 79...Chuck cylinder, 81...Moving cylinder, 83...
Chuck piston, 113...Piston rod,
115...Auxiliary chuck device.

Claims (1)

[Scope of Claims] 1. A pressing body 69 for pressing a propelled object is provided at the tip of a piston rod 67 of a main cylinder 63 that is pressed by hydraulic operation, and a guide rod 51 is provided in a direction parallel to the main cylinder 63. ,5
3, a main chuck device 78 which is removably locked by hydraulic operation is fixedly attached to the main cylinder 63 via a jack stand 65. A propulsion device characterized in that an auxiliary chuck device 115 is integrally attached to the tip of the piston rod 113 and is detachably engaged with the guide rods 51 and 53 by hydraulic operation. 2. The main chuck device 78 and the auxiliary chuck device 115 are provided with an annular chuck piston 83 that can freely reciprocate in the axial direction by hydraulic pressure in the chuck cylinder 79.
A chuck body 93 is provided in the chuck cylinder 79 through the guide rods 51 and 53 and is interlocked with the chuck piston 83 and releasably engaged with the outer periphery of the guide rods 51 and 53.
The propulsion device according to claim 1, which is attached to a vehicle. 3. The annularly provided chuck body 93 is divided in the circumferential direction and provided so as to be able to freely reciprocate integrally with the chuck piston 83, so that as the chuck body 93 reciprocates, the chuck body 93 The inclined surfaces 95 and 97 provided on the outer periphery of the chuck cylinder 79 are replaced by the inclined surfaces 103 and 97 provided on the outer periphery of the chuck cylinder 79.
105 to press and fix the chuck body 93 to the outer peripheral surfaces of the guide rods 51, 53. 4 A press base 127 is installed at the tip of the piston rod 67 of the main cylinder 63 which is press-operated by hydraulic operation.
The main chuck device 78 is provided with a pressing body 69 for pressing the propelled object through the main cylinder 63, and is removably engaged with the guide rods 51, 53 provided in parallel to the main cylinder 63 by hydraulic operation. The guide rod 5 is fixed to the main cylinder 63 via a jack stand 65, and the guide rod 5 is attached to the press stand 127.
A propulsion device characterized in that an auxiliary chuck device 115 is integrally attached to 1 and 53 and is detachably locked by hydraulic operation. 5. The main chuck device 78 and the auxiliary chuck device 115 are provided with an annular chuck piston 83 that can freely reciprocate in the axial direction by hydraulic pressure in the chuck cylinder 79.
A chuck body 93 is provided inside the chuck cylinder 79 so as to pass through the guide rods 51 and 53, and is interlocked with the chuck piston 83 and releasably engaged with the outer periphery of the guide rods 51 and 53.
The propulsion device according to claim 4, which is attached to a vehicle. 6. The chuck body 93 provided in an annular shape is divided in the circumferential direction and provided so as to be able to freely reciprocate integrally with the chuck piston 83, so that as the chuck body 93 reciprocates, the chuck body 93 The inclined surfaces 95 and 97 provided on the outer periphery of the chuck cylinder 79 are replaced by the inclined surfaces 103 and 97 provided on the outer periphery of the chuck cylinder 79.
105, and the chuck body 93 is pressed and fixed to the outer peripheral surfaces of the guide rods 51, 53.