JPH0259354B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is a pipe laying device for sequentially adding and laying buried pipes in an excavated trench in the cut-and-cover method of water and sewage pipe construction. Regarding.

(Prior art and its problems, etc.) Conventionally, in the cut-and-cover method of water and sewage pipe construction, the work of laying underground pipes in excavated trenches was
It was common practice for buried pipes to be lifted into trenches using cranes, etc., and then a large number of workers would go into the trenches, directly lift the pipes, and add more. In some cases, tools such as levers, hawks, winches, and hitch parers were used to add pieces.

In any case, the reality is that the work has traditionally been done manually, which is time-consuming and inefficient. Not only that, but because workers had to enter the narrow premises to work, there was a risk of the trench collapsing, and depending on how the pipes were handled, it was extremely dangerous.

(Objective of the Invention) Therefore, the object of the present invention is to mechanize all the work of laying pipes in the trench, to save labor and to enable unmanned construction, and to carry out all the work above (outside) the trench.
It is an object of the present invention to provide a pipe laying device having a structure that can be used for construction work and ensure work safety.

(Structure of the Invention) In order to achieve the above object, the pipe laying device of the present invention has the following features:
A pin-hinged frame formed by rotatably connecting a pair of frame pieces with pins whose posture is remotely controlled by means such as a hydraulic jack, and (b) having a rotation axis substantially perpendicular to the pin-hinged frame. (c) a beam mounted substantially horizontally on the rotating shaft of the swing motor; (d) a predetermined stroke in the longitudinal direction of the beam on one end side of the beam; It is suspended so that it can be moved freely.
(e) a clamp part configured to grip a pipe by opening and closing a pair of clamp pieces by remote control using a means such as a hydraulic jack; (e) a fixed clamp part for gripping the pipe opening of an existing buried pipe; a movable clamp section that moves a predetermined stroke in the longitudinal direction of the buried pipe gripped by the fixed clamp section to fit and fasten the pipe ports of both pipes; and a hydraulic jack that moves the movable clamp section a predetermined stroke. and a pipe fastening section suspended from the other end of the beam.

(Example) To explain in more detail with an example, Fig. 1 is a schematic diagram of the procedure when installing a pipe into a trench using the pipe installation device of the present invention in the cut-and-cover method of water and sewerage pipe construction. It shows.

1 in the figure is a drive vehicle using a small boxhoe, etc.
Reference numeral 2 denotes a pipe laying device that is attached to and supported by the tip of the bendable boom 3 of the drive vehicle 1 and is remotely operated;
5 is the excavated trench, 5 is the earth retaining plate that prevents the collapse of trench 4,
6 is a newly buried pipe caught by the pipe installation device 2 (however, it may also be simply referred to as a pipe; the same shall apply hereinafter);
6′... are already buried pipes that have been laid and buried in the backfill soil 7.

The drive vehicle 1 is a self-propelled vehicle, and is arranged outside the groove 4 or so as to straddle the groove 4, as shown in FIG. Then, the pipe 6 temporarily placed on the ground is grabbed by the pipe laying device 2, carried into the trench 4, its laying position is determined, and a dong is performed to fasten it to the already buried pipe 6'. It supplies the necessary power source to the pipe laying device 2.

FIG. 3 shows the configuration of the pipe installation device 2 in detail.

In the figure, A indicates the entire pin-hinged frame A. The main elements are an upper frame 11 and a lower frame 12, which are connected at one end by a substantially horizontal pin 10 and are vertically rotatable. A piston rod 14a of a hydraulic jack 14 (stroke of about 180 mm) for attitude control, which is attached to the other end of the upper frame 11 with a pin 13, is connected to the same end of the lower frame 12 with a pin 15. In other words,
Hydraulic jack 14 remotely controlled from drive vehicle 1 etc.
Due to the expansion and contraction operations, the paired upper frame 11 and lower frame 12 are rotated around the pin 10.

By the way, the two tip members 3a and 3b constituting the boom 3 of the driving vehicle 1 are each connected to a position near the upper edge of the upper frame 11 by a pin 16. That is, the attitude of the upper frame 11 is controlled by the boom 3, and the lower frame 12 rotates with respect to the relatively stationary upper frame 11 due to the expansion and contraction of the hydraulic jack 14, and its tilt angle (attitude) changes. It is controlled.

In the figure, 20 is a swing motor for horizontal rotation. This is installed on the lower frame 12 constituting the pin hinge type frame A in such a manner that its rotation axis 21 is directed vertically downward. A center portion of a substantially horizontal beam 22 having a length of approximately 1.5 m is attached and fixed to the rotating shaft 21. The cross-sectional shape of the beam 22 is width x height = 60 x 60 mm as shown in Figure 4.
It has an approximately C-shaped steel shape with a downward opening.

23 in the figure is a stopper installed on the lower surface of the lower frame 12. This abuts against a receiver 24 installed at a corresponding position on the upper surface of the beam 22, thereby restricting the beam 22 from turning more than 360 degrees.

Next, in the figure, B is a tube clamp part suspended from the left end side of the beam 22, and C is a pipe fastening part suspended from the right end side of the beam 22.

As shown in detail in FIG. 4, the tube clamp section B includes a pair of symmetrical clamp pieces 40, 4 that grip a tube 6 having a diameter of, for example, about 210 mm from both sides.
0' is the center. A pair of clamp pieces 40, 4
0' has its upper inner symmetrical position pin 41,
It is rotatably attached to a box-shaped frame 42 at 41'. A hydraulic jack 44 (stroke 40 mm) attached to the upper end of the clamp piece 40 with a pin 43
The other piston rod 44a is connected to the upper end of the other clamp piece 41' by a pin 45.

In other words, the pair of clamp pieces 4 are moved by the telescopic operation of the hydraulic jack 44 that is remotely controlled from the drive vehicle 1, etc.
0 and 40' are opened and closed around pins 41 and 41' to grip and release the tube 6.

In the figure, reference numeral 46 indicates a tube gripping part attached to the lower inner surface of each clamp piece 40, 40', and reference numeral 47 indicates a part attached to the substantially central portion of the lower surface of the box-shaped frame 42. The pipe 6 is connected to these three parts 46, 4.
It is gripped at 7.

A bracket 48 protruding from the center of the upper surface of the box-shaped frame 42 is attached to the main frame 50 of the movable platform D (FIG. 4) installed in the hollow part of the beam 22.
It is connected with a pin 49 and suspended.

As for the movable platform D, as shown in detail in FIGS. 4 and 5, the main frame 50 has a vertical T-shaped plate shape.
The front and rear 2 rest on the bottom of the hollow part of the beam 22 on the head of the
The structure includes two running rollers 51, 51 and a steady rest roller 52 that touches the same ceiling surface. The main frame 50 has a downward opening 5 of the beam 22.
It is derived downward through 3.

In other words, the tube clamp section B can freely move back and forth in the longitudinal direction of the beam 22 together with the movable table 50 by a necessary stroke (for example, about 120 to 140 mm).

In the figure, reference numeral 54 indicates a stopper pin that prevents the moving table D from jumping out from the left end of the beam 22 in FIG. 3, and reference numeral 55 indicates an angle that reinforces the lower side of the beam 22.

As shown in FIGS. 1 and 2, this pipe clamp part B grips a position closer to the center of the newly buried pipe 6 than the pipe opening.

Next, as shown in detail in FIGS. 6 to 8, the pipe fastening part C includes a fixed clamp part E that grips the pipe opening of the existing buried pipe 6', and a movable clamp part E that grips the pipe opening of the newly buried pipe 6. The clamp part F forms the center.

The fixed clamp part E is as shown in FIG.
A pair of downward clamp pieces 60, 60' that grip an existing buried pipe 6' with a diameter of about φ210 from both sides.
is the center. Each of the clamp pieces 60, 60' is rotatably attached to the frame plates 62, 62 by pins 60, 60' at symmetrical positions on the upper inner side thereof. A pin 64 is attached to the upper end of one clamp piece 60.
Hydraulic jack 63 (stroke 40mm) installed with
position), the piston rod of the other clamp piece 6
It is attached to the upper end of 0' with a pin 65.
The frame plates 62, 62 are arranged to sandwich both sides of the pair of clamp pieces 60, 60', and are fixed by welding to a frame frame 80 which is assembled into a box shape by welding steel plates.

Therefore, the pair of clamp pieces 60, 60' are opened and closed by the telescopic operation of the hydraulic jack 63 remotely controlled from the drive vehicle 1, etc., thereby gripping and releasing the pipe 6'.

In FIG. 7, 66 is a part attached to the lower inner surface of each clamp piece 60, 60', 67 is a part attached to the lower surface of the frame 65,
is gripped by these three parts 66 and 67.
On the other hand, as shown in FIG. 8, the movable clamp F also has a pair of downward clamp pieces 70, 7.
Centered at 0'. Each of the clamp pieces 70, 70' is rotatably attached to the movable frame 72 at symmetrical positions on the upper inner side thereof with pins 71, 71'. A pin 7 is attached to the upper end of one of the clamp pieces 70.
Hydraulic jack 74 (stroke 40
mm) piston rod on the other clamp piece 7
It is connected to the upper end of 0' by a pin 75.

Therefore, the pair of clamp pieces 70, 70' are opened and closed by the expansion and contraction of the hydraulic jack 74, and the pipe 6 is thereby gripped and released.

In FIG. 8, 76 is a part attached to the lower inner surface of each clamp piece 70, 70', and 77 is a part attached to the lower surface of the movable frame 72.

By the way, the movable frame 72 is movable along a guide rod 78 disposed in the left half of the box-shaped frame 80 in FIG. The guide rods 78 consist of three guide rods, two on both sides of the upper part and one in the center of the lower part, each of which is arranged parallel to the longitudinal direction of the frame 80 (the left-right direction in FIG. 6), and both ends are fixedly supported. . Guide rod 7
The total length of 8 is around 360mm. The movable frame 72 is
It has a guide sleeve 79 that slides on each guide rod 78, and the movement stroke of the movable frame 72 is set to about 130 mm. This stroke is
This is the distance for fitting and fastening the pipe ports of the new buried pipe 6 and the existing buried pipe 6'.

Next, reference numeral 90 in FIG. 6 indicates a movable clamp member for moving, which is installed on the left end surface of the frame frame 80 in a direction parallel to the longitudinal direction of the center line of the tube 6 gripped by the guide rod 78 and the movable clamp member F. It is a hydraulic jack. Its stroke is about 145 mm, and the tip of the piston rod 91 is connected to the movable frame 72 with a pin 92.

In other words, the movable clamp part F is operated by the hydraulic jack 9.
0, it is moved back and forth as necessary.

A bracket 81 is protruded from the upper surface of the frame 80 at a position substantially above the center of gravity, and the bracket 81 is connected to a hanger 82 fixed to the beam 22 by a pin 83, thereby connecting the pipe fastening section described above. C is suspended from the right end of the beam 22 in FIG.

(Operation and Effect) In short, according to the pipe installation device 2 of the present invention,
The operator of the road vehicle 1 causes the movable clamp part F of the pipe fastening part C to grasp the pipe opening of the newly buried pipe 6 temporarily placed on the side of the groove 4, and at the same time, the pipe is suspended independently from the beam 22. The newly buried pipe 6 is gripped at a position slightly closer to the center using the pipe clamp part B. Then, by manipulating the position of the drive vehicle 1 and its boom 3, the pipe 6 is brought into the groove 4 and added to the pipe opening of the already buried pipe 6' (FIG. 2).

At this time, in order to orient the grabbed tube 6 parallel to the groove 4 and to align the center line with the buried tube 6', the swing motor 20 is operated to rotate the beam 22. Further, in order to correct the height difference between the mouths of the two pipes 6 and 6' (to level the newly buried pipe 6), the hydraulic jack 14 is operated to tilt the beam 22.

To connect the pipes to each other, first, the fixed clamp part E of the pipe fastening part C grasps the pipe opening of the buried pipe 6', and then both pipes 6, 6' are connected as described above.
align the center lines of the two, and extend the hydraulic jack 90. Then, the movable clamp part F moves forward to the right in FIG.
is inserted into the immovable existing buried pipe 6' which is gripped by the fixed clamp part E and is strongly fastened.
At this time, the pipe clamp part B, which is also gripping the newly buried pipe 6, moves to the right on the beam 22 together with the movable clamp part F, thereby enabling the above-mentioned fastening operation to be performed smoothly.

The above-mentioned pipe installation work can be carried out by the operator of the driving vehicle 1 alone while visually checking from above the groove 4, and does not require entering the groove 4 at all. Therefore, the trench work can be done unmanned, which increases safety.

In addition, all the work can be done by mechanization, which saves labor and is highly efficient. Furthermore, the mutual fastening force between the pipes can be controlled at a constant level using hydraulic pressure, and construction quality can be ensured. It is also possible to reduce construction costs.

[Brief explanation of the drawing]

Figures 1 and 2 are work flow diagrams using the pipe laying device of the present invention, Figure 3 is a front view of the pipe laying device, Figure 4 is a detailed side view of the pipe clamp section, and Figure 5 is a detailed side view of the pipe clamp section.
6 is a detailed front view of the tube clamp portion, and FIGS. 7 and 8 are sectional views taken along the arrows - and - in FIG. 6.

Claims (1)

[Scope of Claims] 1. (a) A pin-hinged frame A that is attached to and supported by the tip of the boom 3 of the driving vehicle 1 and whose posture is controlled by a jack 14; (b) A rotation axis substantially perpendicular to the pin-hinged frame A. 21; (c) a beam 22 mounted substantially horizontally on the rotation shaft 21 of the swing motor 20; (d) one end of the beam 22; A pipe clamp part B is suspended so as to be movable by a predetermined stroke in the longitudinal direction of the beam 22; A pipe suspended from the other end of the beam 22, comprising a movable clamp part F that is movable by a predetermined stroke in the longitudinal direction of the pipe with respect to the fixed clamp part E, and means 90 for moving the movable clamp part F. A pipe installation device comprising: a fastening portion C; 2. The pin-hinged frame A described in claim 1 includes an upper frame 11 that is coupled to the boom 3 of the driving vehicle 1, and one end of which is connected to the upper frame 1.
1 and a lower frame 12 rotatably connected by a substantially horizontal pin 10, and a posture control jack 1 is provided on the other end side of the upper frame 11 and the lower frame 12.
4 are connected to each other, and a swing motor 20 is installed on a lower frame 12. 3. The pipe clamp section B described in claim 1 includes a pair of clamp pieces 40 for gripping the pipe 6,
40' is opened and closed by a hydraulic jack 44,
The upper part of the frame 42 to which the clamp pieces 40, 40' are attached is connected to the movable table D by a pin 49, and the movable table D is movable into the hollow part of the beam 22, which has a substantially C-shape with a downward cross section. Pipe installation equipment configured to be installed in 4 Pipe fastening part C described in claim 1
A fixed clamp part E is installed downward on one side of a frame 80 connected to the beam 22 by a pin 83, and a movable clamp part F is installed downward on the other side and with respect to the fixed clamp part E. Teha tube 6
A jack 90 for moving the movable clamp part is installed in the frame 80 so as to be movable along a guide rod 78 parallel to the longitudinal direction of the pipe 6.
The piston rod is connected to a movable clamp part F in the pipe laying device. 5. The fixed clamp part E and the movable clamp part F described in claim 4 are connected to the pipes 6 and 6', respectively.
A pair of clamp pieces 60, 60' or 7 that grip the
0 and 70' are opened and closed by hydraulic jacks 63 or 74.