JP3907340B2 - Propulsion device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a holding portion that is screwed to one end side of the propulsion shaft member and holds the propulsion shaft member movably in the propulsion direction, and a propulsion portion that propels the propulsion shaft member held by the holding portion. The present invention relates to a propulsion device that propels a plurality of the propulsion shaft members in the ground while being screwed together in the propulsion direction, and forms a buried hole in the tube at the propulsion trace.
[0002]
[Prior art]
The propulsion device propels a plurality of propulsion shaft members while being screwed together in the propulsion direction when propelling the propulsion shaft member that is screwed and held at one end with the holding portion in the ground. When the shaft member is propelled into the soil or pulled out from the soil, it is necessary to repeatedly attach and detach the holding portion and the propulsion shaft member.
[0003]
The holding unit of the conventional propulsion device rotatably supports a rotating member that is screwed into one end side of the propelling shaft member and integrally formed with a screw portion that holds the propelling shaft member in a concentric manner. The propulsion shaft member that is driven and rotated in the forward and reverse directions by the drive device and is prevented from rotating is attached and detached.
[0004]
[Problems to be solved by the invention]
For this reason, if the threaded portion of the rotating member that engages the propelling shaft member is worn or crushed and damaged while the attachment and detachment of the rotating member and the propelling shaft member are repeated, the entire rotating member must be replaced. Therefore, it is necessary to manufacture and store the entire rotating member as a spare part, and it also takes time to attach and detach the rotating member assembled so that the driving force of the driving device is transmitted. There is a disadvantage that maintenance management is expensive.
[0005]
In addition, if a propulsion device is installed in the pit and a plurality of propulsion shaft members are screwed together and propelled in the ground while a screw part malfunctions, the rotating member is replaced in the pit. When the propulsion device is taken out from the pit to the ground side and its rotating member is replaced, the propulsion device is difficult to install in the original posture so that the propulsion can be resumed successfully when it is installed again in the pit. There is.
[0006]
The present invention has been made in view of the above circumstances, and does not require high cost for maintenance and management of the rotating member screwing the propulsion shaft member, and allows the screw portion to be easily replaced even in the pit. For the purpose.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, the propulsion shaft member is screwed to one end side of the propulsion shaft member to hold the propulsion shaft member movably in the propulsion direction, and the propulsion shaft member is held by the holding portion. A propulsion unit for propelling the pipe, and propelling the plurality of propulsion shaft members in the ground while being screwed together in the propulsion direction, and forming a buried hole of the pipe in the propulsion trace, The holding part is provided with a rotating member having a concentric screw part screwed to one end side of the propulsion shaft member, and a drive device for driving and rotating the rotating member forward and backward. The rotating member and the propelling shaft member or the propelling shaft members are configured to be attached to and detached from each other in reverse rotation, and the rotating member is connected to the driving rotating member to which the driving force of the driving device is transmitted. part was formed constituted by removably connecting the screw member are the The a moving rotary member and the screw member fitted to each other from the axial direction detachably bolt connected, a point that is fitted a key for preventing rotation the fitting surface between the screw member and the drive rotary member is there.
[0008]
That is, when the propulsion shaft member is propelled into the soil, a new propulsion shaft member (hereinafter, referred to as a preceding propulsion shaft member) and a rotation member that is screwed into the screw portion of the rotation member (hereinafter referred to as a prior propulsion shaft member) (Hereinafter referred to as the subsequent propulsion shaft member), the propulsion operation is temporarily stopped and the propulsion direction rear end of the preceding propulsion shaft member that is prevented from rotating by the drive rotation in the screwing release direction of the rotating member. After releasing the screwing between the side and the screw part, the holding part is moved backward in the direction opposite to the propulsion direction, and the subsequent propulsion shaft member is kept in the non-rotating state between the holding part and the preceding propulsion shaft member. After holding the core and drivingly rotating the rotating member in the screwing direction, the trailing end of the subsequent propulsion shaft member is screwed into the screw portion of the rotating member, and then the rotating member is further moved to the subsequent propulsion shaft. Drive and rotate integrally with the member in the screwing direction, and push the front end of the subsequent propulsion shaft member in the propulsion direction. By repeating the procedure of screwing to the rear end side in the advance direction, a plurality of propulsion shaft members are propelled in the ground while being screwed together in the propulsion direction.
[0009]
Further, when the propulsion shaft member is pulled out from the soil after the buried hole is formed, the propulsion shaft member (hereinafter referred to as the preceding pull-out shaft) screwed to the rotating member among the propulsion shaft members screwed to each other. When removing the member, the pulling operation is temporarily stopped, and the propulsion shaft member (hereinafter referred to as the subsequent pulling shaft member) screwed to the rear end of the leading pulling shaft member is prevented from rotating. The rotating member is driven and rotated integrally with the preceding extraction shaft member in the screwing release direction to release the screwing between the preceding extraction shaft member and the subsequent extraction shaft member, and then the rotation of the preceding extraction shaft member is prevented. When the drive rotation in the screw release direction releases the screw connection between the preceding extraction shaft member and the rotation member, removes the preceding extraction shaft member, and resumes the extraction operation, Move backward in the reverse direction Then, the rotating member is driven and rotated in the screwing direction, and the procedure of screwing the front end side in the drawing direction of the succeeding drawing shaft member that is prevented from rotating to the screw portion of the rotating member is screwed together. Pull out the propelling shaft member from the ground.
[0010]
If the screw portion of the rotating member is worn or crushed and damaged, the screw member forming the screw portion is removed from the driving rotating member to which the driving force of the driving device is transmitted and damaged. A new screw member having an unthreaded screw portion is connected to the drive rotating member.
[0011]
Accordingly, since only the screw member of the rotating member can be replaced, it is only necessary to manufacture and store only the screw member as a spare part, and without removing the driving rotating member to which the driving force of the driving device is transmitted. In addition, since only the screw member needs to be attached to and detached from the drive rotating member, the maintenance of the rotating member is not expensive.
[0012]
In addition, since only the screw member needs to be replaced, a failure of the screw part occurs while the propulsion device is installed in the pit and propelled in the ground while screwing together the plurality of propulsion shaft members. Even so, it can be easily replaced in the pit.
[0014]
In addition, the drive rotation member and the screw member are fitted to each other from the axial direction and are detachably connected by bolts, and the rotation-preventing key is fitted on the fitting surface between the drive rotation member and the screw member. Even if the member is driven and rotated in either the forward or reverse direction, the rotational torque can be transmitted from the drive rotating member to the screw member.
[0015]
Therefore, the subsequent propulsion shaft member and the rotating member can be reliably attached and detached.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a propulsion device according to the present invention in which a plurality of propulsion shaft members 1 are propelled substantially horizontally in the ground while being screwed together in the propulsion direction, and a buried hole of a pipe is formed in the propulsion trace. The support shaft 4 supported in a rectangular aluminum alloy box-shaped casing 3 having an upper opening 2 is screwed to one end side of the steel propelling shaft member 1, and the propelling shaft member 1. Is provided with a holding part 5 movably held in the same propulsion direction as the axial direction and a propulsion part 6 for propelling the propulsion shaft member 1 held by the holding part 5.
[0017]
As shown in FIG. 7 (a), the propulsion shaft member 1 includes a leading propulsion shaft member 1a having an inclined front end surface 8 and steel expanded in diameter at both ends as shown in FIG. 7 (b). There is a rod-shaped propulsion shaft member 1b that is made of rod, and the propulsion shaft members 1b for the expansion are each provided with a female screw portion 9 provided at the front end portion of each propulsion shaft member 1a and a male screw portion 10 provided at the rear end portion. The leading propulsion shaft member 1a and the additional propulsion shaft member 1b are connected to the male screw portion 10 provided at the rear end of the leading propulsion shaft member 1a and the female screw portion of the additional propulsion shaft member 1b. 9 to be connected by screwing.
[0018]
Further, a water passage 11 communicating with each other in a connected state is formed along the axis of each propulsion shaft member 1a, 1b, and this water passage 11 is connected to a high-pressure water supply passage 43 formed in a rotary head 27 described later. Thus, propulsion efficiency is improved by propelling while propelling high-pressure water into the unexcavated ground from the tip of the leading propulsion shaft member 1a.
[0019]
The casing 3 is formed by bolting two pieces of an upper divided casing 3a and a lower divided casing 3b each having a rectangular aluminum plate peripheral wall having the same dimensions in a plan view so as to be separated vertically.
[0020]
Further, along the entire circumference of the upper edge of the peripheral wall of the upper divided casing 3a, the plate 19 as a support member for supporting the upper edge of the casing 3 on the ground surface is formed in a bowl shape along the height position substantially the same as the upper edge. When the depth of the casing 3 is shallower than the depth of the work pit P, as shown by the phantom line in FIG. 1, the upper opening 2 is positioned at substantially the same height as the ground surface G, and the propulsion device Can be suspended and supported in the pit P.
[0021]
As shown in FIGS. 2 and 3, the support frame 4 is configured by fixing a front support frame 4a and a rear support frame 4b in parallel to each other before and after the support substrate 4c. Four guide rods 20 are fixed parallel to each other across the rear support frame 4b.
[0022]
As shown in FIG. 4, a support member 22 having a support surface 21 that supports the lower surface of the propulsion shaft member 1, and the propulsion shaft member 1 and the holding portion 5 are attached to and detached from the front support frame 4a. A chuck mechanism 23 is provided for holding the propulsion shaft member 1 supported by the support member 22 in a non-rotating state when the shaft members 1 are attached and detached.
[0023]
The chuck mechanism 23 includes a cylinder member 24 fixed to the front support frame 4a, a piston member 25 that moves in and out of the cylinder member 24 by hydraulic pressure, and a steel roller 26 that is rotatably supported at the lower end of the piston member 25. The rotation circumferential surface 26a of the roller 26 prevents rotation of the propulsion shaft member 1 around the axis when contacting the outer circumferential surface of the propulsion shaft member 1, and in the axial direction of the propulsion shaft member 1. A large number of circumferential surfaces having a smaller diameter toward the center in the width direction of the roller are formed in a step shape so as to allow the movement.
[0024]
As shown in FIG. 5, the holding portion 5 includes a rotary head 27 as a rotary member having a female screw portion 27 a that is screwed into the rear end portion of the propulsion shaft member 1, and the rotary head 27. A case 41 provided with a hydraulic motor 28 as a driving device for driving and rotating in the forward and reverse directions and a power transmission unit 48 for transmitting the driving force of the hydraulic motor 28 to the rotary head 27 is slidable along the guide rod 20. A propulsion shaft member fixed to the movable frame 29, with the rotary head 27 rotating forward and backward, the rotary head 27 and the propulsion shaft member 1, or the propulsion shaft member 1 being attached to and detached from each other, and screwed into the rotary head 27 1 is configured to be movable in the propulsion direction.
[0025]
The rotary head 27 includes a slide shaft member 42 as a drive rotary member that is slidably movable in the axial direction on the case 41 and rotatably supported, and a screw member 49 having a female screw portion 27a. The ring 50 is engaged with each other from the axial direction and is detachably connected with a plurality of (three) bolts 51. As shown in FIG. 6, the end surface 52 of the slide shaft member 42 is formed. A plurality of (three) anti-rotation keys 53 that are screwed to each other are fitted into the fitting surfaces of the slide shaft member 42 and the screw member 49.
[0026]
The power transmission unit 48 is driven by the rotary head 27 by meshing a driven gear 45 attached to the slide shaft member 42 via a spline joint 44 and a drive gear 47 fixed to the drive rotary shaft 46 of the hydraulic motor 28. While transmitting the force, the rotary head 27 is allowed to slide in the axial direction over the length necessary to attach and detach the rotary shaft 27 and the propelling shaft member 1 or the propelling shaft members 1. It is configured.
[0027]
The propulsion unit 6 reciprocates the movable frame 29 along the guide rod 20 by driving a pair of left and right hydraulic cylinders 30 interposed between the front support frame 4a and the rear support frame 4b. The propulsion shaft member 1 held by the portion 5 is propelled.
[0028]
More specifically, each double-pressing hydraulic cylinder 30 includes a cylinder body portion 31 and a pair of cylinder shafts 32a and 32b that can be inserted and removed from both ends of the cylinder body portion 31, and an end portion of one cylinder shaft 32a is It is fixed to the front support frame 4a, and the end of the other cylinder shaft 32b is fixed to the rear support frame 4b.
[0029]
At both front and rear ends of each cylinder body 31, winding support portions 34a and 34b, to which sprockets 33a and 33b are rotatably attached, are provided and wound around each of the pair of front and rear sprockets 33a and 33b. Both ends of the chain 35 are fixed to a substantially central position in the front-rear direction of the support substrate 4 c by a chain stopper member 36, and the center portion of the chain 35 is fixed to the movable frame 29 by a chain connecting member 37 to drive the hydraulic cylinder 30. The accompanying movement of the cylinder body 31 causes the holding unit 5 to reciprocate with the movable frame 29 over a position indicated by a solid line and a position indicated by a two-dot chain line in FIG.
[0030]
Then, as shown in FIG. 1, the propulsion device is installed in a work pit P excavated at one end of a section where the pipe is planned to be embedded, and the rear end portion of the propulsion shaft member 1 is screwed and held in the holding portion 5. By moving the cylinder body 31, the propulsion shaft member 1 is pushed in the propulsion direction toward the ground while being rotated by the driving rotation of the rotary head 27.
[0031]
That is, as shown in FIG. 2, for example, when the propulsion shaft member 1 (A) is pushed in the propulsion direction while rotating by one stroke of the hydraulic cylinder 30, the propulsion shaft member 1 (A) is stopped by the chuck mechanism 23. However, the rotary head 27 is driven and rotated in the screwing release direction, the male screw portion 10 of the propulsion shaft member 1 (A) is removed from the female screw portion 27a of the rotary head 27, and then the hydraulic cylinder 30 is moved backward. Return to the dead center (state shown by the solid line in FIG. 3), and newly install the propulsion shaft member 1 (B) between the rear end side of the propulsion shaft member 1 (A) pushed in and the holding portion 5 In addition, the propulsion shaft member 1 (B) is held in a non-rotating state, and the male screw portion 10 is screwed into the rotary head 27 by driving rotation of the rotary head 27 in the screwing direction. While pushing the thrust shaft member 1 (A) pushed in by the chuck mechanism 23, The rotation head 27 is driven and rotated together with the propulsion shaft member 1 (B) in the screwing direction, the female screw portion 9 is screwed into the male screw portion 10 of the propulsion shaft member 1 (A), and the hydraulic cylinder 30 is moved forward again. The propulsion shaft screwed together by repeating a series of operations of moving to the dead point (state shown by the two-dot chain line in FIG. 3) and pushing the newly added propulsion shaft member 1 (B) in the propulsion direction The member 1 (1a, 1b) is propelled in the ground while rotating, and finally the leading propulsion shaft member 1a is made to reach the target point, so that a buried hole of the pipe can be formed in the propulsion trace.
[0032]
By the way, when embedding the pipe in the embedding hole of the propulsion trace, the end of the embedding pipe is connected to the propulsion shaft member 1b instead of the leading propulsion shaft member 1a reaching the target point, and the above-mentioned propulsion time is In the reverse procedure, the propulsion shaft member 1b can be pulled out into the working pit P while the tube for embedment is pulled into the burial hole, and the tube can be embedded.
[0033]
Accordingly, the propulsion shaft member 1 and the rotary head 27 that have stopped moving in the axial direction both during propulsion and when being pulled out are attached to and detached from the rotary head 27 by driving rotation, and the movement in the axial direction is also performed. When the propulsion shaft member 1 that is stopped and the propulsion shaft member 1 screwed into the rotary head 27 are attached and detached by driving rotation of the rotary head 27, the rotary head 27 is synchronized with the rotation of the rotary head 27. Slides in the screwing direction over the length necessary for attachment and detachment together with the slide shaft member 42.
[0034]
The support frame 4 has shaft members 38 provided on both the left and right sides thereof so that the holding portion 5 and the propulsion portion 6 can be integrally supported with respect to the casing 3 so as to freely swing up and down. Is supported on the peripheral wall of the lower divided casing 3b by a swing arm 40 with a turnbuckle 39 as an adjustment portion interposed between the left and right portions of the front support frame 4a. The support shaft 5 is moved along the vertical direction of the propulsion shaft member 1 by swinging and supporting the swinging arm 40 with the turnbuckle 39 and swinging the holding portion 5 together with the support frame 4 with respect to the casing 3. The propulsion direction can be adjusted.
[0035]
[Other Embodiments]
<1> In the propulsion device according to the present invention, a screw member in which a male screw portion screwed into a female screw portion formed on one end side of the propulsion shaft member is concentrically connected is detachably connected to the drive rotating member. A rotating member configured as described above may be provided.
<2> In the propulsion device according to the present invention, the male screw portion or the female screw portion of the propulsion shaft member that is screwed into the screw portion formed on the screw member of the rotating member is the screw portion that screw-couples the propulsion shaft members to each other. It may be provided separately.
[Brief description of the drawings]
1 is a schematic side view showing a use state of a propulsion device according to the present invention. FIG. 2 is a plan view of the propulsion device. FIG. 3 is a side view of a main portion of the propulsion device. FIG. 5 is a cross-sectional view of the main part. FIG. 6 is a perspective view of the main part. FIG. 7 is a side view of the propulsion shaft member.
DESCRIPTION OF SYMBOLS 1 Propulsion shaft member 5 Holding | maintenance part 6 Propulsion part 27 Rotating member 27a Screw part 28 Drive device 42 Drive rotating member 49 Screw member 53 Key for rotation prevention

Claims (1)

A holding portion that is screwed to one end side of the propulsion shaft member and holds the propulsion shaft member movably in the propulsion direction; and a propulsion portion that propels the propulsion shaft member held by the holding portion;
A propulsion device for propelling the propulsion shaft member in the ground while being screwed together in the propulsion direction, and forming a buried hole in the tube in the propulsion trace,
The holding part is provided with a rotating member having a concentric screw part that is screwed to one end side of the propulsion shaft member, and a driving device that drives the rotating member to rotate forward and backward. It is configured to attach and detach the rotating member and the propelling shaft member or the propelling shaft members in forward and reverse rotation,
The rotating member is configured by detachably connecting a screw member forming the screw part to a driving rotating member to which a driving force of the driving device is transmitted ,
Promotion and the screw member and the drive rotary member fit together from the axial direction detachably bolt connected, there is fitted a key for preventing rotation the fitting surface between the screw member and the drive rotary member apparatus.

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