JPS59370Y2 - Continuous trench drilling equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a continuous trench excavation device that continuously excavates trenches for laying water, sewage, electric cables, etc.

The purpose of this invention is to rotate multiple packets attached at intervals to an endless chain in one direction by reciprocating the drive cylinder, making it possible to powerfully excavate ground containing gravel. An object of the present invention is to provide a continuous trench excavation device having a simple configuration.

This invention will be described in detail below with reference to an illustrated embodiment.

In the figure, 1 is a self-propelled vehicle that has a power engine (not shown) mounted on the front part of the vehicle body 1a.
A steering wheel 2 is provided on the rear side of the base body 1a, and a single drive wheel 4 is provided at a position closer to the excavator main body 3 provided on the side of the vehicle body 1a.

Further, a driver's seat 5 is provided above the rear of the vehicle body 1a, and in the vicinity of this driver's seat 5, various control mechanisms 6 necessary for operating the self-propelled vehicle and necessary for operating the excavation equipment main body 3 are installed. Various operating mechanisms (not shown), a hydraulic oil tank 7, a fuel tank 8, etc. are installed.

On the other hand, the excavator main body 3 installed on the side of the car body 1a is attached to the lower end of the swing link 10 via a bracket 9a on the lower part of the mounting member 9 which protrudes horizontally from the car body 1a to the side. The upper end side of this swing link 10 is attached to a swing cylinder 12 mounted on the member 9.
This allows it to rotate forward and backward.

A front lower part of a swing bracket 13 is pivotally attached to the upper end of the swing link 10 by a pin 14, and a tilt cylinder 15 is provided diagonally between the bottom of the swing bracket 13 and the swing link 10. The tilt cylinder 15 allows the swing bracket 1 to swing around the pin 14.
3 can rotate.

Further, one end sides of parallel links 16 and 17 are pivotally connected to the rear upper and lower parts of the swing bracket 13 via pins 18 and 19.

The other end side of each parallel link 16 and 17 is pivotally connected to a support member 20 via pins 18' and 19', and this support member 20, each parallel link 16, 17, and the swing bracket 13
A four-part parallel link mechanism is constructed, and a lift cylinder 21 is provided between the swing bracket 13 and the support member 20 so as to be positioned diagonally between each of the parallel links 16 and 17. The support member 20 can be moved up and down with respect to the swing bracket 13 by the lift cylinder 21.

The upper part of the excavation mechanism 22 is attached to the front part of the support member 20.

The excavation mechanism 22 has a pair of parallel long frames 23 whose upper ends are fixed to both sides of the support member 20.

A shaft rod 2 is provided between the upper and lower ends of these frames 23, respectively.
4 and 25 are suspended horizontally, and sprockets 26 and 27 are attached to both ends of these shaft rods 24 and 25, and an endless connection is made between the upper sprocket 26 and the lower sprocket 27. A chain 28 is wrapped along the inside of each frame 23.

The chain 28 has a structure in which a number of links 28a are connected by pins 28b, and a number of packets 29 are attached to the outside of the chain 28 at equal intervals.

Each packet 29 has a digging blade 29a at its tip, and there is no bottom below the digging blade 29a, and the earth and sand excavated by the digging blade 29a is distributed between the side plates 29b and both sides of these. Bottom plate 29 attached to the lower part of plate 29 b
The chain 28 is accommodated between the holes C and raked upward as the chain 28 rotates.

Further, a drive cylinder 30 is provided between each chain 28.

The base end of the drive cylinder 30 is supported by the upper shaft rod 24, and is rotatably attached to the tip of the piston rod 30a projecting downward by a hook 31 or pin 32 shown in FIG. It is being

The tip of the hook 31 protrudes forward (in the digging state), and when the drive cylinder 30 is extended, that is, when it is descending along the frame 23, it rotates in the direction of arrow a and connects the link 28 of the chain 28. Pin 28 connecting a
The drive cylinder 3 is designed to be able to slide on b.
As the chain 28 moves upward along the frame 23 as it shortens, the tip engages with the nearby pin 28b, causing the chain 28 to rotate clockwise as shown in FIG. The packet 29 attached to the chain 28 is also rotated upward.

The hydraulic circuit (not shown) that supplies hydraulic pressure to the drive cylinder 30 is provided with a solenoid valve that is controlled by a limit switch (not shown) that operates at the end of the vertical stroke of the piston 30a. As a result, the drive cylinder 30 automatically expands and contracts.

Further, the chain 28 is prevented from rotating in the opposite direction, that is, counterclockwise in FIG. 2, by a stopper mechanism (not shown).

On the other hand, due to the rotation of the chain 28, the digging blade 2 of the packet 29 is
After the earth and sand excavated in step 9a is stored in a packet 29 and transported upward, it is attached to a dump truck parked in front of the self-propelled vehicle by a conveyor 33 attached diagonally to the member 9.
- While being loaded onto a transport vehicle 34 such as a rack, a reaction force support mechanism 35 is attached to the rear of the support member 20 to support the excavation reaction force.

The reaction force support mechanism 35 includes a support arm 37 whose base end is pivotally connected to the lower part of the work equipment support member 20 by a pin 36, and a rotation cylinder 38 which rotates the distal end of the support arm 37 in the vertical direction. The wheel 3 is attached to the tip of the support arm 37.
9 is rotatably supported.

Therefore, when excavating a trench for laying electrical cables for water and sewage, etc., first position the work machine 3 on the planned line, and then use the lift cylinder 21 to move the work machine 20 to the second position.
The lower part of the excavation mechanism 22 is brought into contact with the ground surface by raising it to the position shown in Figure A, and the wheels 3 of the reaction force support mechanism 35 are
9 is positioned slightly behind the excavation mechanism 22 and is grounded.

In this state, the drive cylinder 30 is reciprocated and the chain 2
8 and the bucket 1-29 attached thereto are rotated in one direction, and excavation is started from the ground surface using the packet 29. As the excavation is carried out, the support member 20 is sequentially lowered by the lift cylinder 21, and the rotating cylinder 38 causes the wheels 39 of the reaction force support mechanism 35 to shift backward from the ground surface.

When the lowest end of the excavation mechanism 22 reaches the desired groove depth, the support member 20 is lifted up to the position shown in FIG. (slightly behind the excavation mechanism 22).

Then, the excavating mechanism 22 is lowered together with the wheels 39 to the bottom of the previously dug trench.

Therefore, the supporting member 20 is fixed, and in this state, the self-propelled vehicle 1 is moved forward while rotating the packet 29 to continuously dig into the trench.

The earth and sand excavated by each packet 29 is accommodated in the packet 29 and transported to the ground, and is further loaded onto a transport vehicle 34 via a conveyor 33, and the excavation mechanism 22
Since the excavation reaction force generated during trench excavation is supported by the wheels 39 of the excavation reaction force support mechanism 35, the excavation reaction force may cause the self-propelled vehicle 1 to swing unstably or fall backwards. do not have.

On the other hand, when the predetermined trench excavation is completed, the excavation mechanism 22 is raised to the position shown in FIG. and extrude.

As a result, the support member 20 and the excavation mechanism 22 are
In this position, the entire excavation equipment main body 3 can be compactly stored within the entire length of the self-propelled vehicle 1, and the wheels 39 of the excavation reaction force support mechanism 35 are in contact with the rear of the vehicle body 1a of the self-propelled vehicle 1, so that the four wheels It is possible to run stably like a vehicle, and it is also possible to move quickly to the next work site.

In the above embodiment, a state has been described in which the device is attached to the side of the vehicle body 1a of the self-propelled vehicle 1, but it may also be attached to the front and rear of the vehicle body 1a, or to the tip of the boom of a revolving excavator.

As detailed above, this idea reciprocates the drive cylinder so that the hook provided at the tip of the piston rod of the drive cylinder is hooked onto the pin of the chain supporting the packet, thereby rotating the packet in one direction. Because of this, the driving force of the drive cylinder can be transmitted powerfully to the buckets 1~, which makes it possible to powerfully excavate roads in urban areas that are contaminated with gravel and other foreign objects.
Even if the packet hits large gravel or foreign matter, the large gravel or foreign matter can be easily removed by manually controlling the drive cylinder and continuing excavation while monitoring the movement of the packet.

In addition, since excavation and loading can be carried out continuously, the amount of work per unit time is greater than with swing excavators, etc., and since there is no need to swing during loading, the area occupied by the work is small, and it can be used in urban areas. There is little risk of hindrance to traffic when working in the area.

Moreover, since the chain is driven by a single drive cylinder, the structure is simple and inexpensive, and since the drive cylinder is located between each frame and protected by the frame, it can fall during work. There is also less risk of damage to drive cylinders, hydraulic piping, etc. due to rocks etc.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, with FIG. 1 being a plan view, FIG. 2 being a side view, and FIG. 3 being a detailed view of the bucket drive section. 1 is a self-propelled vehicle, 1a is a vehicle body, 3 is a working machine, 26 and 27
is a sprocket, 28 is a chain, 28a is a link, 2
8 b is a pin, 29 is a packet, 30 is a drive cylinder,
30a is the piston rod, 31 is the hook.

Claims (1)

[Scope of utility model registration request] A pair of parallel frames 23 are attached to the rear part of the vehicle body 1a of the self-propelled vehicle 1 so as to be vertically movable via parallel links 16.17, and sprockets 26.27 are provided at the upper and lower ends of these frames 23. A chain 28 in which a large number of links 28 a are endlessly connected by pins 28 b is wrapped between the sprockets 26 and 27, and a plurality of packets 29 are attached to the chain 28 at intervals. A drive cylinder 30 with one end fixed to the frame 23 is provided along the chain 28, and a hook 31 is provided at the tip of the piston rod 30a of the drive cylinder 30, which idles when extended and engages a part of the chain 28 when shortened. With the reciprocation of the drive cylinder 30, the chain 28
A continuous trench excavating device in which the packet 29 can be freely rotated in one direction via the .