JPH11247223A - Belt conveyor and hydraulic shovel for mounting belt conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic shovel for mounting a belt conveyor and the belt conveyor freely detachable from or capable of engaging with the hydraulic shovel without being deprived of the wide use. SOLUTION: A conveyor belt 10 is arranged on the lower part of the lower running body 3 of a general purpose hydraulic shovel 1 and between the right and left crawler belts 2, 2 in the proceeding direction of the hydraulic shovel 1 and fitted to the lower running body 3 detachably and lockably through a lifting means 40. A hopper 30 is detachably fitted in the front of the belt conveyor 10 and a sloped portion 20 sloped with respect to the ground is provided on the rear so that a conveyed object can be loaded on a transportation vehicle from the rear. When earth and sand are to be conveyed, a horizontal portion of the belt conveyor 10 in its midway is put on the ground and when moving, the belt conveyor 10 is moved by the general purpose hydraulic shovel 1 traveling after lifting it up by means of the lifting means 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor which is attached to a hydraulic shovel and conveys earth and sand excavated in front of the hydraulic shovel to the rear, and a general-purpose hydraulic which allows the belt conveyor to be freely attached, detached or engaged. About excavators.

[0002]

2. Description of the Related Art Conventionally, when excavating and discharging soil in a narrow place such as a tunnel using a hydraulic excavator (a so-called hydraulic excavator, hereinafter referred to as a hydraulic excavator), earth and sand excavated in front of a vehicle has been used. A belt conveyor is used for transporting the paper to the rear or loading it on a transport vehicle such as a dump truck after the paper is transported. For this purpose, as a first example, a hydraulic shovel conventionally used is one in which a belt conveyor is fixedly mounted on a side portion of a vehicle body and above, for example, a lower traveling body having a crawler belt. As a second example, there is a hydraulic excavator in which a belt conveyor is fixed along the front-rear direction between a pair of left and right crawler belts at a lower part of a vehicle body. In both cases, when earth and sand are loaded on the carrier of the transport vehicle from the rear end of the belt conveyor, the tip of another belt conveyor should be installed below the rear end of the belt conveyor attached to the vehicle body, and this other belt The conveyor is installed so as to be inclined with respect to the ground so that its rear end is higher than the carrier of the transport vehicle.

[0003]

However, the following problems occur in the conventional hydraulic excavator equipped with the belt conveyor as described above. (1) In the first example, since the belt conveyor is fixed to the side of the vehicle body, versatility is lost, and the belt conveyor can be used only as a dedicated machine that only performs work in a narrow place. . In addition, since the entire width of the vehicle is increased due to the belt conveyor, the vehicle cannot move freely in a narrow place and lacks mobility. (2) In the second example, since the belt conveyor is fixed below the lower traveling body and between the left and right crawler belts, it is located between the lower end surface of the belt conveyor and the ground when moving. Must have a predetermined gap. Further, in order to secure the earth and sand conveyance amount equal to or more than the predetermined amount, a gap equal to or more than a predetermined distance is required between the conveyance surface of the belt conveyor and the lower surface of the lower traveling body. However, general-purpose hydraulic excavators that are commonly used have a low ground clearance on the lower surface of the lower traveling body, and when a general-purpose belt conveyor is arranged, a gap between the transfer surface and the lower part of the vehicle body is reduced. The transport of the earth and sand becomes difficult, or the transport amount becomes very small.
Therefore, the clearance above the predetermined distance between the conveying surface of the belt conveyor and the lower surface of the lower traveling body is secured by increasing the ground height of the lower traveling body. Therefore, the hydraulic excavator at this time becomes a dedicated machine, and loses versatility and becomes expensive. In addition, since the vehicle height increases, workability may be reduced in places where the height is restricted such as a tunnel excavation site.

The present invention has been made in view of the above-mentioned problems, and a belt conveyor and a hydraulic device for mounting the belt conveyor, which can freely attach and detach or engage the belt conveyor without losing versatility of the hydraulic excavator, and have good workability. The aim is to provide excavators.

[0005]

Means for Solving the Problems, Functions and Effects In order to achieve the above object, the invention according to claim 1 is attached to a hydraulic shovel and conveys earth and sand excavated in front of the hydraulic shovel backward. In such a belt conveyor, the excavator is detachably or engageably attached to a hydraulic shovel, is moved by traveling of the hydraulic shovel when moving, and is grounded and transported when transporting earth and sand.

According to the first aspect of the present invention, the belt conveyor is detachably or detachably attached to the hydraulic shovel, so that attachment and detachment are facilitated. Therefore, if necessary, the excavator can be used alone for excavation work without mounting a conveyor, and the hydraulic excavator can be used for general purposes, thereby improving versatility. Further, since the belt conveyor attached to the excavator is moved by traveling of the excavator, there is no need to provide a moving means on the belt conveyor itself, and the structure of the belt conveyor is simplified, and the belt conveyor can be configured at low cost. . Furthermore, since the lower surface of the belt conveyor is grounded when transporting earth and sand, the stability of the belt conveyor during transportation is improved, and the transport amount is increased, and efficient transport is possible. Also, for example, below a lower traveling body of a hydraulic shovel,
In addition, when the belt conveyor is mounted between the left and right crawler belts, the distance between the conveyor surface of the belt conveyor and the lower surface of the lower traveling body can be sufficiently increased at the time of transporting soil and sand, thereby increasing a unit time. Since the per-conveyance amount increases, efficient conveyance becomes possible.

According to a second aspect of the present invention, in the belt conveyor according to the first aspect, there is provided a lifting / lowering means 40 which is detachable or engageable with the hydraulic shovel, and which lifts the main body of the belt conveyor 10 to the hydraulic shovel when moving. It has a configuration.

According to the second aspect of the present invention, when moving, the belt conveyor can be lifted by the elevating means and separated from the ground, and therefore, the belt conveyor can be moved with a small running resistance. This makes it possible to easily move the hydraulic shovel by traveling. Further, since the lifting / lowering means is detachable or engageable with the hydraulic excavator, workability when attaching the belt conveyor to the hydraulic excavator is good.

The invention described in claim 3 is the first or second invention.
In the described belt conveyor, a lifting guide 31 that is provided at one end side and guides the earth and sand to the transport surface of the belt conveyor 10 during earth and sand transport, and is provided at one end side and accumulates the earth and sand guided to the transport surface, A hopper 30 for regulating the height of the earth and sand to be carried is provided.

According to the third aspect of the present invention, the earth and sand excavated by the bucket of the hydraulic excavator is smoothly guided to the conveying surface of the belt conveyor by the lifting guide.
Excavation work can be performed efficiently. Further, since the earth and sand guided to the conveying surface of the belt conveyor are accumulated by the hopper and the height is regulated, the conveyance on the belt conveyor can be performed smoothly and efficiently, and the working efficiency is improved.

According to a fourth aspect of the present invention, in the belt conveyor according to the third aspect, the hopper 30 or the hopper 30 and the lifting guide 31 are connected to the belt conveyor (10).
It is removable.

According to the fourth aspect of the present invention, the hopper or the hopper and the lifting guide are detachable, so that when the belt conveyor is mounted on the hydraulic excavator, the hopper or the lifting object becomes an interference. Guides and the like can be removed from the belt conveyor. This allows
For example, if the hydraulic shovel cannot advance from the rear side of the belt conveyor across the belt conveyor between the crawler belts (such as when the rear part is inclined with respect to the ground), move the hydraulic shovel backward from the front side of the belt conveyor. It is possible to mount it across the belt conveyor. Therefore, the work of mounting the belt conveyor on the hydraulic excavator becomes easy.

The invention described in claim 5 is the first or second invention.
In the belt conveyor described above, a hopper 30 that accumulates earth and sand excavated by a hydraulic shovel and regulates the height of earth and sand to be conveyed is provided at a front end, and a horizontal part that is grounded to the ground when earth and sand is conveyed is provided at an intermediate part. It has a part 12, and at the rear,
In order to throw earth and sand into the transport vehicle from the rear end portion, the vehicle has a configuration in which an inclined portion 20 is inclined upward with respect to the ground.

According to the fifth aspect of the present invention, the front end has a hopper, the middle has a horizontal portion grounded to the ground when the earth and sand is transported, and the rear has a rear end for feeding the earth and sand to the transport vehicle. Since it has the inclined portion which is inclined upward with respect to the ground, it is possible to perform operations from loading and transporting of earth and sand to loading on a transport vehicle by one belt conveyor. Therefore, in addition to the effect of claim 1 or 2,
Further, it is possible to stably and efficiently transport earth and sand, and to manufacture a belt conveyor which can be mounted on a hydraulic excavator with a simple configuration.

According to a sixth aspect of the present invention, in the belt conveyor according to the fifth aspect, an up-and-down device 50 for changing a refraction angle α of the inclined portion 20 with respect to the ground is provided.

According to the sixth aspect of the present invention, it is possible to change the height of loading on the transport vehicle by changing the refraction angle, and the optimum loading height for the transport vehicle to be loaded is provided. Can be set. Therefore, the efficiency of the loading operation to the transport vehicle by the belt conveyor is improved.

[0017] The invention according to claim 7 is the invention according to claim 5 or 6.
In the belt conveyor described above, a pressing roller that connects the horizontal portion 12 and the inclined portion 20 and guides the right and left ends of the conveying surface 18 of the belt 14 from above by a bending portion 24 where the belt 14 is bent. 23.

According to the seventh aspect of the present invention, it is possible to prevent the belt bent by the bending portion, in which the horizontal portion and the upwardly inclined portion are connected, from being lifted by the tension, by pressing the right and left ends from above with the pressing roller. Holding down. Therefore,
Belt deflection is prevented, and the earth and sand transport by the belt conveyor can be performed smoothly.

[0019] The invention described in claim 8 is the first or second invention.
6. The belt conveyor according to 3 or 5, further comprising a swinging means 60 for swinging a rear end portion in a vertical direction.

According to the eighth aspect of the present invention, the rear end of the belt conveyor is configured to be swingable in the vertical direction, and the height of the rearmost end of the belt conveyor is changed by changing the swing angle. be able to. Therefore, since the carry-out distance and the drop position of the earth and sand can be changed, the load can be efficiently loaded on the carrier or the like of the transport vehicle, and the workability at the time of loading is improved.

The ninth aspect of the present invention is the first aspect of the present invention.
The belt conveyor according to 3 or 5, wherein the crawler belt 2 is located below the lower traveling body 3 of the general-purpose hydraulic excavator 1 and on the left and right sides.
The width and height can be arranged between the two.

According to the ninth aspect of the present invention, it is possible to dispose a belt conveyor below a lower traveling body of a general-purpose hydraulic shovel, which is often used, and between left and right crawler tracks. At this time, since a general-purpose hydraulic excavator is used instead of a special-purpose hydraulic excavator as in the related art, the vehicle height and the vehicle width can be reduced.
Therefore, workability in a narrow place where the height and width are limited, such as a tunnel excavation site, is improved. In addition, during the earth and sand transport work, by lowering the lower surface of the belt conveyor to the ground, the conveying surface of the belt conveyor is lowered, and the gap between the conveying surface and the lower surface of the excavator is widened, thereby ensuring a sufficient conveyance amount. be able to. Therefore, efficient conveyance becomes possible.

According to a tenth aspect of the present invention, the belt conveyor of the ninth aspect has means for detachably or engagingly attaching the belt conveyor, and the attached belt conveyor is moved by itself. In addition, the belt conveyor 10 is a general-purpose hydraulic excavator 1 that is driven by a vehicle-mounted hydraulic power source and a power supply.

According to a tenth aspect of the present invention, there is provided means for detachably or engagingly attaching the belt conveyor of the ninth aspect, and the attached belt conveyor is moved by itself. In addition, a general-purpose hydraulic excavator that can drive the belt conveyor (10) with a vehicle-mounted hydraulic power source and a power source is used. As a result, it is possible to easily configure a hydraulic shovel that can be mounted on a conveyor and excavated, transported, and loaded into a transport vehicle without losing the versatility of the hydraulic shovel. Therefore,
The hydraulic shovel for mounting the belt conveyor can be manufactured at low cost, and the operating rate of the hydraulic shovel can be improved by utilizing the hydraulic shovel for general shovel work as needed.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a belt conveyor according to the present invention and a general-purpose hydraulic excavator to which the belt conveyor can be attached will be described below in detail with reference to FIGS.

FIG. 1 is a side view showing a state in which a belt conveyor 10 is mounted on a general-purpose hydraulic excavator 1. The general-purpose hydraulic excavator 1 includes a lower traveling body 3 having a pair of right and left crawler tracks 2, an upper revolving body 4 rotatably mounted on the lower traveling body 3, and a vertically swinging front swinging body 4. And a work machine 6 movably provided and having a bucket 5 and the like. A belt conveyor 10 is arranged below the lower traveling body 3 and between the pair of left and right crawler belts 2 and 2 in the front-rear direction. 3 is detachably attached. Note that the lower traveling body 3 is not limited to the type and number of traveling means as described above, and may be, for example, a wheeled traveling body having a predetermined number of wheels, or a crawler belt having two tracks on the left and right. You may have more than a pair.

The belt conveyor 10 has a horizontal portion 12 in the middle portion, the lower surface of which is set on the ground when conveying earth and sand.
10 has an inclined portion 20 bent upward with respect to the ground so that earth and sand can be loaded on a transport vehicle such as 10. A drive hydraulic motor 11 and a hopper 30 are provided at the front end. When the external dimensions of the drive hydraulic motor 11 are larger than the height of the horizontal portion 12, the front portion of the belt conveyor 10 is horizontal. The portion 12 is inclined slightly upward. The inclination of the front portion is not the gist of the present invention, and may be horizontal. The belt 14 is entirely wound around via a drive hydraulic motor 11 at a front end and a guide wheel 66 at a rear end (details will be described later with reference to FIG. 6). A substantially central portion of the inclined portion 20 has a support portion 28 having a support wheel 25 rotatably at a lower end portion.
Is supported by the ground.

FIG. 2 is a perspective view of the hopper 30 provided at the front of the belt conveyor 10, and the front will be described in detail with reference to FIG. A drive hydraulic motor 11 is disposed between the front ends of a pair of left and right front frames 13, 13 provided at the front and intermediate portions of the belt conveyor 10 so as to be rotatable around a substantially horizontal rotation axis. The belt 14 is configured to be rotationally driven by the hydraulic motor 11. On the side surfaces of the front end portions of the front frames 13, 13, earth and sand excavated by the bucket 5 of the general-purpose hydraulic excavator 1 are belted.
Conveyor 10 from the ground to guide the
A lifting guide 31 provided gently inclining to the conveying surface at the front end of the belt and a hopper 30 for regulating earth and sand larger than the width of the belt 14 and accumulating a predetermined amount of earth and sand are provided with bolts 32 and the like. It is attached detachably. Further, a gate 33 is fixedly provided at an upper portion of the hopper 30 so that a gap between a lower end portion of the hopper 30 and the conveying surface has a predetermined height H1. The gate 33 regulates the height to the predetermined height H1 or less. Although the lifting guide 31 and the hopper 30 are detachable in the above description, the present invention is not limited to this, and only the hopper 30 may be detachable.

FIG. 3 is a partial front sectional view showing a state where the belt conveyor 10 is mounted on the general-purpose hydraulic excavator 1.
FIG. 4 is a perspective view thereof. In FIG. 3, the horizontal portion 12 of the belt conveyor 10 located between the pair of left and right crawler belts 2 has a pair of left and right front frames 13, 13. Is fixedly provided with a plate 15 gently curved downward as viewed from the transport direction. The transport side of the belt 14 for transporting earth and sand is movably mounted on the upper surface of the plate 15. In addition, a roller 16 that supports the return side of the belt 14 so as to be movable from below is provided at a lower portion of the belt conveyor 10 at a predetermined distance in the transport direction of the belt conveyor 10. A plurality of legs 17 are provided on the lower surface of each of the front frames 13, 13, and the legs 17 make contact with the ground.

In FIG. 3, the height H3 of the belt conveyor 10 is such that it can be installed below the lower traveling body 3. Further, a gap H2 between the transport surface 18 of the belt 14 and the lower surface of the lower traveling body 3 has a size sufficient for the belt 14 to transport a predetermined amount or more of earth and sand per unit time. Note that there is a relationship of the predetermined height H1 ≦ the clearance H2.

In FIG. 4, the inclined portion 20 at the rear of the belt conveyor 10 has a pair of left and right rear frames 21, 21. The rear ends of the front frames 13, 13 and the front ends of the rear frames 21, 21 are rotatably connected by connecting pins 22. Front frame 1
The pressing rollers 23 are provided on the upper portions of the rear frames 21 and 21 near the connecting pins 22 respectively.
Are provided so as to be rotatable so as to press and guide the left and right ends of the transport surface 18 of the refracting portion 24 from the upper surface.

3 and 4, the left and right front frames 13, 13 are raised and lowered on the left and right outer surfaces with respect to the belt conveyor 10 in order to lift the belt conveyor 10 when the general-purpose hydraulic excavator 1 is run. Lifting means 40 is provided. The raising / lowering means 40 has the same configuration in the left and right directions with respect to the traveling direction. Hereinafter, the configuration on the left side will be described. That is, wire rope sheaves 42a, 42b are provided on the outer side surface of the front frame 13 at predetermined intervals in the conveying direction of the belt conveyor 10.
Is rotatably mounted. As an example of means for detachably attaching the belt conveyor 10 to the lower part of the lower traveling body 3 of the excavator 1, two U-bolts 43, each of which is left and right in the traveling direction and separated by a predetermined distance in the front-rear direction, 43 is attached. A hook 44 attached to one end of the wire rope 41a is detachably engaged with one of the U bolts 43 in the front-rear direction on each of the left and right sides.
A hook 44 attached to one end of the wire rope 41b is detachably engaged with the other U bolt 43. Further, the other end portions of the left and right wire ropes 41a and 41b are connected by a lifting cylinder 45. These left and right U bolts 43 and wire ropes 41a, 4
The lifting means 40 is constituted by 1b and each lifting cylinder 45.

Projections 46, 46 are provided substantially above the sheaves 42a, 42b rotatably provided on the outer side surface of each front frame 13, and the belt conveyor 10 is raised by the lifting means 40. In this case, the protrusions 4 are attached to stoppers 7 provided on the lower surface of the lower traveling body 3.
6, 46 are in contact with each other. The width W1 of the belt conveyor 10 is smaller than the interval W2 between the left and right crawler belts 2 and 2, and is set to a size that can be arranged between the crawler belts 2 and 2.

FIG. 5 shows the inclined portion 20 of the belt conveyor 10.
FIG. 6 is a side view of the undulating device 50 that changes a refraction angle α with respect to the ground. In the present embodiment, the undulating device 50 includes the support portion 28, the hook 52, and the wire rope 51. The support portion 28 has a first arm 26 and a second arm 27 each having one end side attached to a substantially central portion of a pair of left and right rear frames 21 and 21 of the inclined portion 20 at a predetermined distance.
And a support wheel 25 rotatably attached to the other end of the first arm 26 and the second arm 27. The rear portion of the belt conveyor 10 is supported on the ground by the support portion 28. A hook 52 to which one end of a wire rope 51 is engaged is provided at the rear of the rear frame 21. The other end of the wire rope 51 is connected to the bucket 5 of the working machine 6 of the universal hydraulic shovel 1. It is designed to be engaged with the cutting edge.

In order to change the refraction angle α, the other end of the wire rope 51 is detachably engaged with the cutting edge of the bucket 5 of the general-purpose hydraulic excavator 1 and the bucket 5 is raised, so that the slender shape shown in FIG. Inclined part 2 as shown by the two-dot chain line
0 is changed. After that, the pin 53 that locks one end of the second arm 27 supporting the support wheel 25 to the rear frame 21 is removed, and a plurality of adjustment holes 54 provided at predetermined intervals on the side surface of the rear frame 21 are removed. One end of the second arm 27 is locked at a predetermined position by a pin 53 to support the inclined portion 20 on the ground. As described above, by changing the refraction angle α, the height of the rear end portion of the belt conveyor 10 can be optimized according to the height of the load such as the bed of the transport vehicle, and the working efficiency is improved. .

FIG. 6 is a side view of the swinging means 60 provided at the rear end of the inclined portion 20 of the belt conveyor 10. As shown in FIG. A swing conveyor 61 provided at the rear end of the inclined portion 20 is attached between a pair of left and right rear frames 21 and 21 by a pin 62 so as to be vertically swingable. The swing conveyor 61
A pair of left and right swing frames 65, 65 provided on the side surface
And a guide wheel 66 that is swingably provided between the rear ends of the swing frames 65, 65. The pin 62
A pair of left and right pressing rollers 67, 67 are rotatably mounted on the upper portions of the rear frames 21, 21 and the upper portions of the swing frames 65, 65, respectively. The right and left ends are pressed by the pressing rollers 67, 67.

The swing frame 6 of the swing conveyor 61
Bracket 63 protruding from the lower part of 5, 65
A swing cylinder 64 is rotatably mounted between the swing frame 64 and the rear frame 21. When the swing cylinder 64 expands and contracts, the swing conveyor 61 swings around the pin 62, and Is changed. When the swing conveyor 61 is swung to the upward position as shown by the solid line in FIG.
When the swing conveyor 61 swings to the downward position indicated by the thin two-dot chain line, the earth and sand is carried out at a short distance L2. That is, the reaching distance of the earth and sand can be adjusted according to the carrier of the transport vehicle such as the dump truck 110 or the situation at that time, so that the working efficiency can be improved.

FIG. 7 is a perspective view of the driver's seat 70 of the universal hydraulic excavator 1 for mounting a belt conveyor. Driving seat 7
A work lever 72 for operating the work machine 6 is provided on the left and right of the travel lever 72 for moving forward and backward.
3, 74 are arranged. A service valve switching pedal 76 for switching a service valve (described later) which is normally provided at a predetermined position for operating an optional function is disposed beside the traveling lever 72.
A belt conveyor control switch box 80 is disposed on one of the left and right sides of 1. The belt conveyor control switch box 80 includes a swing control button (including an up button and a down button) 81 that controls a swing cylinder 64 that swings the swing conveyor 61 at the rear end of the belt conveyor 10 in the vertical direction. A lifting control button (including a raising button and a lowering button) 82 for controlling a lifting cylinder 45 for raising and lowering the belt conveyor 10, and the belt conveyor 1
And a drive motor control button (including a forward button and a reverse button) 83 for controlling the forward / reverse rotation of the drive hydraulic motor 11 for driving 0.

FIG. 8 shows an example of a belt conveyor control circuit diagram. In the figure, a service valve 75 switched by a service valve switching pedal 76 has a normal position (A), a neutral position (B) and a reverse position (C), and a hydraulic pump 77 is connected to its P port. An oil tank 78 is connected to the T port. Each port on the downstream side of the service valve 75 has a drive hydraulic motor 1
1 is connected to a drive motor electromagnetic switching valve 84 for driving the lifting cylinder 45, an elevation electromagnetic switching valve 85 for driving the elevation cylinder 45, and an oscillating electromagnetic switching valve 86 for driving the oscillating cylinder 64. The drive motor electromagnetic switching valve 84 has a forward rotation position (D), a neutral position (E), and a reverse rotation position (F), and the lifting / lowering electromagnetic switching valve 85 has a descending position (G), a neutral position (J), and an ascending position. (K), and the swing electromagnetic switching valve 86 has an up position (M), a neutral position (N), and a down position (P).
The belt conveyor control circuit according to the present invention is shown in FIG.
However, the present invention is not limited to the tandem circuit represented by, and for example, each electromagnetic switching valve may be connected in series, or may be connected in parallel.

The operation signals of the swing control button 81, the elevation control button 82, and the drive motor control button 83 are input to the controller 87. Based on the input operation signals, the controller 87 controls the corresponding oscillating electromagnetic switching valve 86 and lifting / lowering electromagnetic switching valve 8.
5 and a control signal to the drive motor electromagnetic control valve 84. The above-described service valve 75, hydraulic pump 77, and oil tank 78 are previously mounted on the general-purpose hydraulic excavator 10, and other components are additionally mounted. In addition, the power supply for each of these control devices is also wired so as to be supplied from the vehicle-mounted battery of the excavator.

The device for raising and lowering the inclined portion 20 according to the present invention is not limited to the above-described configuration including the hook 52 and the wire rope 51, but may change the angle of refraction α of the inclined portion 20 with respect to the ground. Anything that can be done is acceptable. For example, the undulating device 50a of another embodiment as shown in FIG.
Can also be configured. In the figure, one end of a first arm 26 is rotatably attached to left and right rear frames 21 and 21 of the inclined portion 20 of the belt conveyor 10, and a support wheel 25 is rotatable at the other end. It is attached to. The lower part of the first arm 26 and the rear frame 21
Are rotatably connected by an up / down cylinder 55. An up / down electromagnetic switching valve (not shown) for driving the up / down cylinder 55 is provided, connected to the downstream of the service valve 75 as described above, and an up / down control button (see FIG. (Not shown) so that the up / down cylinder 55 can be operated via the up / down electromagnetic switching valve. At this time, when the up / down cylinder 55 is shortened, the inclined portion 20 rises as shown by a thin two-dot chain line, and when the up / down cylinder 55 is extended, the inclined portion 20 descends.

Next, the belt conveyor 1 having the above configuration
Procedures and operations for attaching or detaching the “0” to or from the general-purpose hydraulic excavator 1 will be described in order. When installing,
The belt conveyor 10 from which the hopper 30 and the lifting guide 31 are removed is installed so that the horizontal portion 12 at the front thereof is grounded on the ground, and the general-purpose hydraulic excavator 1 is moved backward from the front of the belt conveyor 10 to move the belt conveyor 10. Is positioned between the left and right crawler tracks 2. And lifting means 4
The hooks 44, 44 of the right and left wire ropes 41a, 41b are respectively engaged with the U bolts 43, 43 provided on the lower traveling body 3 of the universal hydraulic shovel 1. Then, the hopper 30 and the lifting guide 31 are moved to the belt conveyor 1.
Attach it to the tip of “0”.

In this state, when the operator operates the service valve switching pedal 76, the service valve 75 switches from the position B to the position A, and the hydraulic oil from the hydraulic pump 77 is supplied to each solenoid valve. When the operator operates the up button or the down button of the swing control button 81 of the belt conveyor control switch box 80, the swing electromagnetic switching valve 86 responds to this by setting the M position or the P position by a control signal from the controller 87. Then, the pressure oil is supplied to the bottom side or the head side of the oscillating cylinder 64, and the oscillating cylinder 64 expands or contracts to oscillate the oscillating conveyor 61 of the belt conveyor 10 upward or downward.
Thereby, the flight distance of the earth and sand carried out from the rear end of the belt conveyor 10 is appropriately adjusted according to the transport vehicle.

Thereafter, when carrying out the transfer operation, the operator operates the forward rotation button of the drive motor control button 83. As a result, the drive motor electromagnetic switching valve 84 is switched to the D position by the control signal from the controller 87, the drive hydraulic motor 11 drives the belt 14 to rotate forward, and the belt conveyor 10 can convey earth and sand. When the reverse rotation button of the drive motor control button 83 is operated, the drive motor electromagnetic switching valve 84 is switched to the F position, and the drive hydraulic motor 11 drives the belt 14 to rotate in the reverse direction.

Then, the general-purpose hydraulic excavator 1 at the current position
When the excavation by is completed, the general-purpose hydraulic excavator 1 is moved with the belt conveyor 10 mounted. That is, the operator first operates the lift button of the lift control button 82. As a result, the up / down electromagnetic switching valve 85 is switched to the K position by a control signal from the controller 87, and the pressure oil is supplied to the head side of the up / down cylinder 45, and the up / down cylinder 45 is shortened. The shortening of the lifting cylinder 45 causes the wire ropes 41a and 41b to
a, the belt conveyor 10 is lifted via 42b.
At this time, due to the balance between the front and rear weights, the belt conveyor 10 rises first from the lighter side, and one of the protrusions 46 provided on the belt conveyor 10 in the front-rear direction is moved downward.
Abuts against the corresponding one of the stoppers 7. Thereafter, when the elevating cylinder 45 is further shortened, the belt conveyer 10 is further raised, and when the other projection 46 contacts the other stopper 7, this lifting is completed. Next, by running the general-purpose hydraulic excavator 1 in this state, the running resistance can be reduced and the belt conveyor 10 can be moved at the same time.

When the operator moves to the next excavation position, the operator operates the lowering button of the elevation control button 82.
As a result, the lifting / lowering electromagnetic switching valve 85 is switched to the G position, the lifting / lowering cylinder 45 is extended, and the belt conveyor 10 is lowered. When the horizontal portion 12 of the belt conveyor 10 touches the ground, the above-described operation can be performed, and the transport operation can be repeatedly performed.

When the belt conveyor 10 is removed from the general-purpose hydraulic excavator 1 when all the excavation is completed, the operation reverse to that at the time of the above-described mounting may be performed. That is,
With the belt conveyor 10 grounded, the operator operates the lowering button of the raising / lowering control button 82 to further extend the raising / lowering cylinders 45, 45, and each of the wire ropes 41.
a, 41b are loosened. And this wire rope 41
a, 41b hooks 44 of the undercarriage 3
And remove the general-purpose hydraulic excavator 1 from the belt conveyor 1
Separate from zero. Thus, attachment and detachment of the belt conveyor 10 is extremely easy. Then, by removing the hopper 30 and the lifting guide 31 and running the shovel in front of the belt conveyor 10, the hydraulic shovel 1 can perform the shovel operation alone.

As described above, the general-purpose hydraulic excavator 1 that is usually used is slightly modified (for example, the U bolt 4
(E.g., attachment of the engagement means of the belt conveyor 10 such as 3), installation of piping from the service valve 75, installation and wiring of the belt conveyor control switch box 80, etc.) to easily obtain a hydraulic shovel for mounting the belt conveyor. Can be. Accordingly, the hydraulic excavator for mounting the belt conveyor can be configured at a lower cost than conventional dedicated machines. The belt conveyor 10 is located below the lower traveling body 3 of the excavator 1,
And since it is attached between the left and right crawler tracks, the vehicle width is the same as a general-purpose hydraulic excavator, making it easy to move in narrow places,
The mobility is also good.

Further, the general-purpose hydraulic excavator 1 according to the present invention has a configuration in which the belt conveyor 10 can be detachably or detachably attached, so that the belt conveyor 10 can be detached as necessary and the hydraulic excavator can be operated alone. Can be. Therefore, the present hydraulic shovel is versatile and is used for other general shovel operations, so that the operation rate of the hydraulic shovel can be improved.

When the belt conveyor 10 is engaged with the general-purpose hydraulic excavator 1, the swing conveyor 61 at the rear end of the belt conveyor 10 swings, moves up and down the belt conveyor 10, and drives the hydraulic motor for the belt conveyor 10. When performing each operation of the forward / reverse drive 11, the operator needs to
, So it is extremely operable,
The degree of fatigue is also small.

Next, the lifting / lowering means 40 of the belt conveyor 10
A second embodiment will be described. FIG. 10 is a side view of the lifting / lowering means 40a of the second embodiment. Here, the same components as those of the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the figure, the lower traveling body 3 of the general-purpose hydraulic excavator 1
, And two sheaves 42a and 42b are provided rotatably at predetermined intervals in the front-rear direction on the left and right sides with respect to the traveling direction. The configuration of the elevating means 40a is the same for both the left and right sides in the traveling direction, and the configuration of the left side surface will be described below. Wire rope 41a is sheave 4
2a, one end of which is detachably connected to one of two hooks 44 fixed at predetermined intervals in the front-rear direction on the side surface of the front frame 13 of the horizontal portion 12 of the belt conveyor 10. I agree. Similarly, the wire rope 41b is provided so as to be wound around the sheave 42b, and one end of the wire rope 41b is detachably engaged with the other hook 44. Also,
The other ends of the wire ropes 41a and 41b are
Are connected by

According to the above configuration, the belt conveyor 10 is expanded and contracted by the elevating cylinder 45 as in the first embodiment.
Goes up and down. By operating the elevating control button 82 of the aforementioned belt conveyor control switch box 80, the elevating cylinder 45 can be raised and lowered. Further, the hook 44 and one end side of the wire ropes 41a and 41b are freely engageable, so that the belt conveyor 10 can be easily attached to and detached from the general-purpose hydraulic shovel 1, and versatility of the hydraulic shovel to be mounted can be secured.

Next, a third embodiment of the lifting / lowering means 40 will be described with reference to FIG. FIG. 5 is a side view showing the lifting / lowering means 40b according to the present embodiment. The configuration other than the lifting / lowering means 40b is the same as in the previous embodiment. The configuration of the lifting / lowering means 40b is the same for both the left and right sides in the traveling direction, and the configuration of the left side surface will be described here. First
The link 92 has one end rotatably attached to the front frame 13 of the belt conveyor 10 and the other end connected to the lower traveling body 3.
Is engaged with a long hole 90a formed in a bracket 95a provided in the bracket 95a by a pin 91a. Also, the second link 93
Has one end rotatably attached to the lower traveling body 3 and the other end engaged with a long hole 90b formed in a bracket 95b provided on the front frame 13 by a pin 91b. Further, the first link 92 and the second link 93 intersect in an X-shape, and are rotatably connected to each other at a substantially central portion by a connecting pin 94. Also, this first link 9
The second link 93 and the second link 93 are connected by a lifting cylinder 45 at a position separated from the connection pin 94 by a predetermined distance below.

According to the above configuration, the first link 92 and the second link 93 form a pantograph structure, and when the elevating cylinder 45 expands and contracts, the pins 91a and 91
b slides along the long hole 90a and the long hole 90b, respectively, whereby the belt conveyor 10 moves up and down with respect to the lower traveling body 3. Therefore, the same operation and effect as in the previous embodiment can be obtained.

Next, a fourth embodiment of the lifting / lowering means 40 will be described with reference to FIG. FIG. 5 is a side view showing the lifting / lowering means 40c according to the present embodiment. The configuration other than the lifting / lowering means 40c is the same as in the previous embodiment. The configuration of the lifting / lowering means 40c is the same for both the left and right sides in the traveling direction, and the configuration of the left side surface will be described here. A hook 44 attached to one end of a wire rope 41a is detachably engaged with one of two U-bolts 43 provided at a predetermined interval in the lower traveling body 3 in the front-rear direction. The other end is the front frame 1 of the belt conveyor 10
3 is connected to a moving pulley 95 after being wrapped around a sheave 42a rotatably provided on a side surface of the third pulley. A hook 44 attached to one end of a wire rope 41b is detachably engaged with the other U bolt 43, and the other end of the wire rope 41b is rotatable on the side surface of the front frame 13. After being wrapped around the sheave 42b provided on the moving sheave 96, the trolley 95 is wrapped around the moving sheave 96 of the moving pulley 95, and the tip end thereof is connected to a small winch 97 fixed to the front frame 13.

According to the above configuration, the wire rope 41b is wound up by the rotation of the small winch 97, whereby the belt conveyor 10 moves up and down with respect to the lower traveling body 3. Therefore, the same operation and effect as in the previous embodiment can be obtained.

FIG. 13 is a partial cross-sectional side view of the lifting / lowering means 40d according to the fifth embodiment of the lifting / lowering means 40.
Hereinafter, description will be made with reference to FIG. The lifting means 40d
The other configuration is the same as the previous embodiment. At a predetermined position on the front end of the upper revolving unit 4 of the general-purpose hydraulic excavator 1, a gradient member 102 as an example of means for attaching the belt conveyor 10 so as to be engageable is fixed. This gradient member 10
2 is a gradient surface 1 that descends smoothly from the rear to the front
00 on the upper surface, and a rear end portion of the slope surface 100 has a stopper surface 101 substantially perpendicular to the traveling direction.
A pair of left and right front frames 1 of a belt conveyor 10 installed between a pair of left and right crawler tracks 2 and 2 of a general-purpose hydraulic excavator 1
A pair of left and right brackets 104, 1
04 is detachably attached. This bracket 10
Rollers 103 are provided between the upper portions of the rollers 4 and 104 so as to be rotatable about a horizontal axis in the left-right direction with respect to the traveling direction. Here, the ground clearance h1 at the front end of the slope 100
Is set slightly lower than the ground height h2 at the lowermost portion of the outer peripheral surface of the roller 103.

Next, the operation according to the present embodiment will be described. During the transfer operation, as shown in FIG.
The belt conveyor 10 is installed in contact with the ground without engaging the rollers 103 with the rollers 103. And the belt conveyor 10
Is moved, the general-purpose hydraulic excavator 1 is moved forward with the upper rotating body 4 facing forward as shown in FIG. With this advance, the slope surface 100 of the slope member 102
Abuts against the lower surface of the roller 103, after which the roller 103 moves backward while rolling on the slope surface 100, and comes into contact with the stopper surface 101 and stops. During this time, the roller 103
As the vehicle rises along the sloped surface 100, the front of the horizontal portion 12 of the belt conveyor 10 rises and leaves the ground, while the rear of the horizontal portion 12 remains grounded. When the general-purpose hydraulic excavator 1 is further advanced in this state, the belt conveyor 10 moves together with the general-purpose hydraulic excavator 1 with the rear part of the horizontal portion 12 being grounded. Thereafter, when the transport operation is performed after reaching the predetermined operation position, the general-purpose hydraulic excavator 1 is moved backward by a predetermined distance, and the operation is performed with the horizontal portion 12 of the belt conveyor 10 grounded as shown in FIG. To do.

According to the above configuration, the gradient member 102 provided on the upper revolving unit 4 of the general-purpose hydraulic excavator 1 and the roller 10 provided rotatably at the front of the belt conveyor 10 are used.
3, the front portion of the belt conveyor 10 is lifted, and in this state, the belt conveyor 10 can be moved by the traveling of the general-purpose hydraulic excavator 1. The belt conveyor 10 can be freely engaged with the general-purpose hydraulic shovel 1 as it moves forward and backward, so that the same operations and effects as those of the previous embodiment can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a belt conveyor is mounted on a general-purpose hydraulic shovel of the present invention.

FIG. 2 is a perspective view of a hopper provided at a front portion of the belt conveyor of the present invention.

FIG. 3 is a front partial cross-sectional view showing a state in which a belt conveyor is mounted on the general-purpose hydraulic excavator of the present invention.

FIG. 4 is a perspective view showing a state in which a belt conveyor is mounted on the universal hydraulic shovel of the present invention.

FIG. 5 is a side view of the device for raising and lowering the rear inclined portion of the belt conveyor according to the present invention.

FIG. 6 is a side view of the swinging means at the rear end of the belt conveyor of the present invention.

FIG. 7 is a perspective view of a driver's seat of a general-purpose hydraulic excavator for mounting a belt conveyor according to the present invention.

FIG. 8 is an example of a control circuit diagram of the belt conveyor of the present invention.

FIG. 9 is a side view showing another embodiment of the belt conveyor undulating device of the present invention.

FIG. 10 is a side view of the elevating means of the second embodiment of the belt conveyor of the present invention.

FIG. 11 is a side view of the elevating means of the third embodiment of the belt conveyor of the present invention.

FIG. 12 is a side view of a lifting / lowering means of a fourth embodiment of the belt conveyor of the present invention.

FIG. 13 is a partial cross-sectional side view of a lifting / lowering means of a belt conveyor according to a fifth embodiment of the present invention.

FIG. 14 is a side view showing a state in which a lifting / lowering means of a belt conveyor according to a fifth embodiment of the present invention moves.

[Explanation of symbols]

1 ... General-purpose hydraulic excavator, 2 ... Crawler track, 3 ... Undercarriage, 4
... upper revolving unit, 7 ... stopper, 10 ... belt conveyor,
11: drive hydraulic motor, 12: horizontal portion, 13: front frame, 14: belt, 15: plate, 20: inclined portion,
Reference numeral 21: rear frame, 23: pressing roller, 25: support wheel, 30: hopper, 31: lifting guide, 33: gate, 40: elevating means, 41a, 41b: wire rope,
42a, 42b: sheave, 43: U-bolt, 45: lifting cylinder, 50: hoisting device, 54: adjusting hole, 55: hoisting cylinder, 60: swing means, 61: swing conveyor, 64
... Swing cylinder, 75 ... Service valve, 76 ... Service valve switching pedal, 80 ... Belt conveyor control switch box, 81 ... Swing control button, 82 ... Elevation control button, 8
3: drive motor control button, 84: drive motor electromagnetic switching valve, 85: lifting / lowering electromagnetic switching valve, 86: swinging electromagnetic switching valve, 8
7. Controller, 90a, 90b: Slot, 95: Moving pulley, 97: Small winch, 100: Slope, 103:
roller.

Claims (10)

[Claims] 1. A belt conveyor attached to a hydraulic excavator and transporting earth and sand excavated in front of the hydraulic excavator to the rear, detachably or engageably attached to the hydraulic excavator. A belt conveyor, which is moved and transported while being grounded when transporting earth and sand. 2. The belt conveyor according to claim 1, further comprising lifting / lowering means (40) which is detachable or engageable with the hydraulic shovel, and which lifts the main body of the belt conveyor (10) to the hydraulic shovel when moving. And belt conveyor. 3. The belt conveyor according to claim 1, which is provided at one end side and transports the earth and sand during the transportation of the earth and sand.
A lifting guide (31) for guiding to the conveying surface of (10), and a hopper (30) provided on one end side for accumulating the earth and sand guided to the conveying surface and for regulating the height of the conveyed earth and sand. A belt conveyor comprising: 4. The belt conveyor according to claim 3, wherein the hopper (30) or the hopper (30) and a lifting guide.
(31) A belt conveyor which is detachable from the belt conveyor (10). 5. The belt conveyor according to claim 1, further comprising a hopper (30) for accumulating earth and sand excavated by a hydraulic excavator and regulating a height of earth and sand to be conveyed at a front end. There is a horizontal part that touches the ground when
The rear part has an inclined part (2) that is inclined upward with respect to the ground in order to put earth and sand into the transport vehicle from the rear end.
(0). 6. The belt conveyor according to claim 5, further comprising an undulating device (50) that changes a refraction angle (α) of the inclined portion (20) with respect to the ground. 7. The belt conveyor according to claim 5, wherein the horizontal portion (12) and the inclined portion (20) are connected, and the belt (14) is bent to a bent portion (24). (14) transfer surface (1
8) A belt conveyor comprising a pressing roller (23) for pressing and guiding both left and right end portions from above from above. 8. The belt conveyor according to claim 1, further comprising a swinging means (60) for swinging a rear end portion in a vertical direction. 9. A belt conveyor according to claim 1, 2, 3 or 5, below the lower traveling body (3) of the universal hydraulic shovel (1) and between the left and right crawler tracks (2, 2). A belt conveyor having a width and a height that can be arranged. 10. A belt conveyor (10) according to claim 9, comprising means for detachably or engageably attaching the belt conveyor (10), and the attached belt conveyor (10) is moved by itself.
A hydraulic excavator for mounting a belt conveyor, which is a general-purpose hydraulic excavator (1) for driving the belt conveyor (10) with a vehicle-mounted hydraulic source and a power supply.