JP2916681B1 - Treading device and treading work vehicle - Google Patents

Abstract

An object of the present invention is to make it possible to efficiently perform a treading operation for applying pressure to backfilled soil and compacting the same in a construction or the like for burying a water pipe. A stepping work vehicle includes a backhoe and a stepping device (S) attached to an end of an arm thereof. The stepping device S includes an attachment 1, a parallel link device 2, a holding base 3, and a stepping machine 4. The stepping machine 4 is attached to the holding base 3 so as to be able to move up and down by link plates 41 and 42 so that the vertical movement is not restricted. The stepping machine 4 can be moved in the horizontal direction by the parallel link device 2 while maintaining the orientation in a predetermined direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treading device and a treading work vehicle for leveling the ground by applying pressure to backfilled soil, for example, in a construction work for burying a water pipe or the like. More specifically, the present invention relates to a treading device and a treading work vehicle that can be attached to a self-propelled work vehicle such as a backhoe and can efficiently perform treading work with reduced labor.

[0002]

2. Description of the Related Art In a construction for backfilling soil such as a pipe for a water pipe, a stepping machine (a rammer device) is used for leveling the backfilled soil. Conventional stepping machines are
It has a tread that is driven up and down at a relatively high speed by an engine, and uses the weight of the device and the surface pressure of the tread to compact the soil. In the stepping work using a stepping machine, an operator supported the stepping machine by hand, used the machine while moving it back and forth, right and left, and buried the soil in several parts. By the way, in the construction as described above, in order to prevent danger, it is stipulated that the backfilling of the soil must be completed by the end of the working day. That is, it is not possible to finish the work of the day with the construction grooves and holes left on the ground.

[0003]

The above-mentioned conventional stepping machine has the following problems. (A) In general, a stepping machine is often used at the bottom of a narrow construction groove dug in the ground, and is a difficult work for an operator due to the influence of engine noise and exhaust gas. In addition, the stepping work, which is a finishing work, is urgently performed for the above-described reason. Therefore, it is common to use a plurality of stepping machines at the same time, and the working environment is poor.

(B) Even a small stepping machine is 80 kg
There is weight around. However, in order to prevent collapse due to earth pressure, a plurality of support members are attached to the side surfaces of the construction groove in a state where both sides are stretched. Must be moved. However, the weight of the stepping machine cannot be lifted by one worker, and a plurality of workers cooperate. For this reason, work efficiency is low, which is also a major bottleneck in labor saving.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and in a construction work for burying a water pipe, a treading device and a treading force capable of efficiently performing a treading work of applying pressure to a backfilled soil and compacting it. The purpose is to provide a working vehicle.

[0006]

Means of the present invention taken to achieve the above object are as follows. According to a first aspect of the present invention, there is provided a stepping device used by being attached to a self-propelled work vehicle, comprising an attachment having attachment means for attaching to a work vehicle, wherein the attachment has a plurality of attachments. A stepping device characterized by having a stepping device mounted thereon and having a stepping pressure adjusting means for adjusting a stepping pressure range by the stepping device by moving the plurality of stepping devices.

According to a second aspect of the present invention, there is provided a stepping device which is used by being attached to a self-propelled work vehicle, wherein the attachment has attachment means for attaching to the work vehicle, and is provided on the attachment body. A parallel link device rotating in the horizontal direction, and a stepping machine directly or indirectly attached to the parallel link device in a required number. The stepping machine is oriented by the parallel link device. Characterized in that it can be moved while maintaining in a predetermined direction.

According to a third aspect of the present invention, there is provided a treading device which is used by being attached to a self-propelled work vehicle, wherein the attachment has attachment means for attaching to the work vehicle; A parallel link device that rotates in the horizontal direction, a required number of holding bases provided in the parallel link device, and a stepping machine attached to the holding base. It is attached to the holding base so as to be able to move up and down so that the vertical movement is not restricted,
The parallel link device is characterized in that it can be moved while maintaining the orientation in a predetermined direction,
It is a stepping device.

According to a fourth aspect of the present invention, there is provided the stepping device according to the second or third aspect, wherein the stepping device is driven by a hydraulic motor.

According to a fifth aspect of the present invention, there is provided a stepping device used by being attached to a self-propelled work vehicle, comprising: an attachment having attachment means for attaching to the work vehicle; A required number of stepping machines, and the stepping machine always urges the front side of the stepping plate upward and downward at the front side and the rear side in the traveling direction. And a biasing means.

According to a sixth aspect of the present invention, there is provided a stepping machine comprising: a tread plate whose front and rear sides in the traveling direction can swing up and down;
And a biasing means for constantly biasing the front side of the tread plate upward. The treading device according to the first, second, third, or fourth invention, wherein:

According to a seventh aspect of the present invention, there is provided a work vehicle, and a stepping device according to the first, second, third, fourth, fifth or sixth invention attached to the work vehicle. A treadmill working vehicle characterized in that:

According to an eighth aspect of the present invention, there is provided a self-propelled work vehicle having an arm whose direction can be adjusted, and a first, second, third, fourth, fifth or fifth mounted on a tip of the arm. Sixth
And a stepping device according to the invention.

(Operation) According to the treading work vehicle provided with the treading device according to the present invention, the arm is operated to adjust the treading machine to the height and direction of the construction section, and the self-propelled work vehicle is moved along the working direction. By doing so, the treading work can be performed safely and efficiently. In addition, since the stepping machine is moved by the traveling of the self-propelled work vehicle, the driver can operate outside the groove even when the construction part is at the bottom of the narrow groove, and work on each of the stepping machines. Since there is no need for a worker, labor can be saved. Also, for example, in the case where the treading machine is moved beyond the support member for preventing the collapse of the inside of the groove, efficient backfilling work is possible such that the stepping machine can be easily moved without requiring human power. Becomes

[0015] In the apparatus provided with a tread width adjusting means such as a parallel link device, the tread width can be adjusted by moving the treading machine in the horizontal direction while maintaining the direction of the treading machine.
If the positions of the stepping machines are set so that the working surfaces of the stepping machines do not overlap in the working direction, a wider stepping work can be performed than when one stepping machine is used. Further, setting the position of the stepping machine so that the work surfaces of the stepping machines overlap with each other is effective when the stepping force is applied to a narrow construction part in a short time.

When the holding base has an elevating member which can be moved up and down so that the vertical movement is not restricted, and the stepping machine is attached to the elevating member, the elevating frame body, that is, the treading machine attached to the elevating frame is under its own weight. When the vehicle descends and the lower tread arrives on the ground, the arm of a hydraulic shovel excavator or the like can have a required width capable of ascending or descending by the action of an elevating member such as a link mechanism. Therefore, when performing the stepping work by operating the arm, not so much precision is required for setting the height, the stepping work is facilitated, and the efficiency is improved.

The one in which the stepping machine is driven by a hydraulic motor has a lower level of noise than the engine-driven one and does not generate exhaust gas.
It is possible to improve the working environment in working in a narrow place.

[0018] The stepping machine includes a tread plate whose front and rear sides in the traveling direction can swing up and down, and urging means for constantly urging the front side of the tread plate upward. When is lowered to the ground and the treads are in contact with the ground,
The rear end of the tread plate is in contact with the ground and becomes a fulcrum, and the front portion turns downward against the biasing force of the biasing means, and the entire bottom surface of the tread plate contacts the ground. When the stepping machine is operated in this state, the front side of the tread plate swings largely due to the action of the urging means as the stepping machine jumps. And when the work vehicle advances, even if there is a raised part on the ground in the direction of travel, the front side of the tread plate moves from the top, so that the front end does not plunge into the raised part of the ground , And effective treading pressure becomes possible.

[0019]

Embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 is an exploded perspective view showing an embodiment of a treading device according to the present invention, and FIG. 2 is a sectional view of a main part showing the structure of an attachment of the treading device shown in FIG. 1 and a mounting portion of a parallel link device. FIG. 3 is an explanatory plan view illustrating the parallel link device and the attachment body showing the movement of the stepping machine, omitting the attachment.

Reference numeral S denotes a treading device, which includes an attachment 1, a parallel link device 2, a holding base 3, and a treading machine 4. The attachment 1 includes a rectangular substrate 10. At both ends of the substrate 10, mounting brackets 11, 12 are provided.
Each of the mounting brackets 11 and 12 is provided with two pin mounting portions 13 for mounting to the tip of the arm of the backhoe.

A fixing base 14 is fixed to a central portion on the bottom side of the substrate 10 by a plurality of bolts 15 (FIG. 2).
reference). The fixing base 14 is formed in a circular shape in a plan view, and the fixing plate 140 and the large-diameter portion 14 are sequentially arranged from the base side.
1, a middle diameter portion 142 and a small diameter portion 143 are formed. A plurality of screw holes 144 are provided on the distal end surface of the small diameter portion 143. A bolt 16 is threaded through the distal end surface of the small-diameter portion 143 and screwed into the screw hole 144, and a disk-shaped bottom plate 17 is attached. A pressing portion 170 slightly protruding from the inner side is provided at a peripheral portion on the contact surface side of the bottom plate 17.

The parallel link device 2 constituting the tread width adjusting means is attached to the fixing base 14. The parallel link device 2 includes a rectangular upper plate 20 and a lower plate 21.
The upper plate 20 and the lower plate 21 are provided with a circular hole 200 provided in the center,
210 are fitted into the middle diameter portion 142 and the small diameter portion 143 of the fixing base 14, respectively, and the bottom plate 17 is attached to the fixing base 14 from below by bolts 16. On both sides of the upper plate 20, screw holes 201 and 202 are provided penetrating vertically. Screw holes 20 on both sides of lower plate 21
Insertion holes 211 and 212 are provided at positions corresponding to 1 and 202 so as to penetrate vertically.

Screw hole 201, insertion hole 211 and screw hole 2
02 and the insertion hole 212, bolts 22 and 23 are inserted from the insertion holes 211 and 212 side, and the screw holes 201 and 202 are inserted.
It is screwed into. Further, link members 24 and 25 are mounted between the upper plate 20 and the lower plate 21 so as to be rotatable in the horizontal direction. The link members 24 and 25 have the same length, respectively, and are fitted by inserting through holes 240 and 250 provided in the center into the bolts 22 and 23.

According to the above structure, by loosening the bolts 22, 23, the link members 24, 25 are centered on the bolts 22, 23.
Can be rotated, and the link members 24 and 25 are connected to the upper plate 20 and the lower plate 2 by tightening the bolts 22 and 23.
1 and can be fixed at a required rotation angle (see FIG. 3).
In addition, the upper plate 20 and the lower plate 21 can be rotated by loosening the bolt 16 to release the fixation by the bottom plate 17, and the upper plate 20 and the lower plate 21 are brought to a required rotation position by tightening the bolt 16. Can be fixed. The rotation of the upper plate 20, the lower plate 21, and the link members 24 and 25 can be automatically performed by using a driving means such as a hydraulic motor.

The holding base 3 is attached to both ends of the link members 24 and 25. Each holding base 3 includes a rectangular horizontal attachment plate 30 and vertical plates 31 and 32 suspended from the lower surface on both sides thereof. Each holding base 3 is attached by bolts 26 and 27 so that the link members 24 and 25 are rotatably connected to each other by an attachment plate 30.
The bolts 26 and 27 are connected to the link members 24 and 25 and the attachment plate 3.
A structure in which a certain gap can be ensured so that 0 and 30 can rotate even when bolts are tightened is adopted. In the attached state, the link members 24 and 25 are parallel to each other, and the horizontal plates 30 and 30 are parallel to each other.

On the front side of the vertical plates 31, 32, a stepping machine 4 is mounted. Rectangular side plates 40 are provided on both sides of the stepping machine 4.
Are provided, and the vertical plates 31 and 32 and the side plates 40 and 40 are connected by parallel link plates 41 and 42, respectively. According to this structure, the stepping machine 4 can move up and down with respect to the holding base 3 in a state parallel to the side plate 40. The stepping machine 4 is driven by a hydraulic motor 43 provided at an upper part, and
Reference numeral 4 denotes a structure that moves up and down at a high speed. The front and rear ends of the tread 44 are inclined upward so that they can move smoothly back and forth while compacting the ground. Note that the stepping machine 4 may be configured to be driven by another prime mover such as a gasoline engine.

FIG. 4 is a plan view showing an embodiment of the treadmill working vehicle according to the present invention, and FIG. 5 is a view of an essential part in the direction a in FIG. Reference numeral B denotes a stepping work vehicle having a backhoe 5 which is a self-propelled work vehicle. Backhoe 5 has boom 50
And an arm 51, and the stepping device S is attached to a tip end of the arm 51.

(Operation) The operation of the stepping work vehicle B will be described with reference to FIGS. (1) The treading work vehicle B is arranged beside the construction groove so as to be able to travel along the construction groove, and the upper plate 20 and the lower plate 21 of the parallel link device 2 are rotated, so that the tread plate 44 of the treading machine 4 is moved. The upper plate 20 and the lower plate 21 are fixed by tightening the bottom plate 17 so as to substantially face the traveling direction. Further, the link members 24 and 25 are rotated to set the working width of the treading machines 4 and 4 by the tread plate 44,
The link members 24 and 25 are fixed.

(2) The treading device S is lowered into the groove by operating the arm 51, and the tread plate 44 is placed on the backfilled ground. The height of the arm 51 is set so that the link plates 41 and 42 are substantially parallel to each other so as to be able to move up and down with respect to the holding base 2 (see FIG. 5). (3) Each treading machine 4 is driven, the backhoe 5 is advanced, and the soil is compacted by the tread plate 44 to level the ground. Further, since the ground can be leveled by each stepping machine 4 while the backhoe 5 is retracted, the backhoe 5 can be reciprocated along the construction groove to work efficiently.

As described above, since the movement of the stepping machine 4 is mechanized, the operator can operate outside the construction groove. Further, since there is no need for a driver to attach to each of the stepping machines 4, the work can be saved. For example, in the case where the stepping machine 4 is moved beyond a support member for preventing collapse inside the construction groove. In addition, efficient backfill work is possible, for example, it can be easily exceeded without requiring human power. Further, since the stepping machine 4 is driven by the hydraulic motor 43 using the hydraulic system of the backhoe 5, the noise is lower than that of the engine driven type, no exhaust gas is generated, and the working environment is improved. Can be planned.

Since the treading machine 4 is connected to the holding base 3 by the link plates 41 and 42, even if the arm 51 moves up and down a little, the treading machine 4 is not interfered with.
It is possible to perform appropriate compaction using the weight of the stiffener.
Further, the setting of the height of the arm 51 does not require much accuracy, so that the stepping work is easily performed and the efficiency is improved.

By adjusting the rotation of the link members 24 and 25, the position of the stepping machine 4 can be set so that, for example, a large part of the working surface (width of the tread plate 44) of each stepping machine 4 does not overlap in the working direction. , It is possible to work with a working width of two units. Also, if the position of the stepping machine 4 is set so that the entire work surface of each stepping machine 4 overlaps in the working direction, the work can be continuously performed by the two stepping machines 4, so that the narrow construction portion can be worked in a short time. This is effective when stepping on the pedal.

FIG. 6 is a main part side view showing another embodiment of the stepping machine. In the stepping machine 4a, a tread plate 47 is attached via a shaft pin 46 to a lower end of a vertical moving body 45 provided at a lower portion. The tread plate 47 is attached so that the front side and the rear side can swing up and down around the shaft pin 46. The front side in the traveling direction of the tread plate 47 is bent upward and inclined.

On the upper surface side of the front end of the tread plate 47, a hook 48
Is provided. Also, on the lower part of the body of the stepping machine 4a,
A hook 49 is provided to protrude forward. Hooks 48,
The tension spring 6 is attached between 49. As a result, the front side of the tread plate 47 is constantly pulled upward, and is normally inclined as shown in FIG.

(Operation) FIG. 7 is an explanatory view showing a use state of the stepping machine shown in FIG. 6, and FIG. 8 is an explanatory diagram showing an operation of the stepping machine shown in FIG. Referring to FIG. 6 to FIG.
The operation of a and the treading device having the same will be described.

When the treading machine 4a is lowered to the ground and the tread plate 47 comes into contact with the ground, first, the rear end portion of the tread plate 47 comes into contact with the ground to serve as a fulcrum. The tread plate 47 pivots downward in opposition, and the entire bottom surface of the tread plate 47 comes into contact with the ground. When the stepping machine 4a is operated in this state, the tension spring 6
It swings greatly by being pulled by. When the treading work vehicle B is advanced, even if there is a raised portion 7 on the ground in the direction of travel, the front side of the tread plate 47 is pressed down from above, so that the front end portion has a raised portion 7 on the ground. , And effective pedaling pressure can be achieved.

The terms and expressions used in the present specification are for explanation only, are not restrictive, and do not exclude the terms and expressions equivalent to the above-mentioned terms and expressions. Further, the present invention is not limited to the illustrated embodiment, and various modifications are possible within the scope of the technical idea.

[0038]

The present invention has the above configuration and has the following effects. (A) According to the treading work vehicle provided with the treading device according to the present invention, for example, the arm is operated to adjust the treading machine to the height and direction of the construction section, and the self-propelled work vehicle travels in the working direction. By doing so, treading work can be performed safely and efficiently. As described above, since the stepping machine is moved by the traveling of the self-propelled work vehicle, the operator can operate outside the groove even when the construction part is at the bottom of the narrow groove, and work on each of the stepping machines. Since there is no need for a worker, labor can be saved. Also, in the case where the treading machine is moved beyond the support member for preventing the collapse of the inside of the groove, efficient backfilling work is possible, for example, the manpower can be easily passed without the need for human power. .

(B) With a stepping pressure width adjusting means such as a parallel link device, the stepping pressure width can be adjusted by moving the stepping machine in the horizontal direction while maintaining the direction of the stepping machine. If the positions of the stepping machines are set so that the work surfaces of the stepping machines do not overlap, a stepping work of a wider width than working with one stepping machine becomes possible. Further, setting the position of the stepping machine so that the work surfaces of the stepping machines overlap with each other is effective when the stepping force is applied to a narrow construction part in a short time.

(C) If the holding base has an elevating member capable of moving up and down without restraining the vertical movement, and the stepping machine is attached to the elevating member, the elevating frame, that is, the stepping machine attached thereto Is lowered by its own weight, and when a lower tread or the like reaches the ground, an arm of a hydraulic shovel excavator or the like can have a required width capable of ascending or descending by the action of an elevating member such as a link mechanism. Therefore, when performing the stepping work by operating the arm, not so much precision is required for setting the height, the stepping work is facilitated, and the efficiency is improved.

(D) When the stepping machine is driven by a hydraulic motor, the noise level is lower than that of the engine-driven machine, and no exhaust gas is generated. The work environment in the work at the time can be improved.

(E) The stepping machine is provided with a tread plate whose front and rear sides in the traveling direction can swing up and down, and biasing means for constantly biasing the front side of the tread plate upward. Is
When the treadle is lowered to the ground and the treads are in contact with the ground, first, the rear end of the treads is in contact with the ground and becomes a fulcrum, and the front part is turned downward against the biasing force of the biasing means. And the entire bottom of the tread is in contact with the ground. When the stepping machine is operated in this state, the front side of the tread plate swings largely due to the action of the urging means as the stepping machine jumps. And when the work vehicle advances, even if there is a raised part on the ground in the direction of travel, the front side of the tread plate moves from the top, so that the front end does not plunge into the raised part of the ground ,
Effective treading pressure becomes possible.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a treading device according to the present invention.

FIG. 2 is a cross-sectional view of a main part showing a structure of a mounting base of the treading device shown in FIG. 1 and a mounting portion of a parallel link device.

FIG. 3 is an explanatory plan view of the parallel link device and the attachment, showing the movement of the stepping machine, omitting an attachment;

FIG. 4 is a plan view showing one embodiment of a treadmill working vehicle according to the present invention.

FIG. 5 is a view in the direction of the arrow a in FIG.

FIG. 6 is a side view of a main part showing another embodiment of the treadmill.

FIG. 7 is an explanatory diagram showing a use state of the tread machine shown in FIG. 6;

FIG. 8 is an explanatory view showing the operation of the stepping machine shown in FIG. 6;

[Explanation of symbols]

 S Treading device 1 Attachment body 10 Substrate 11, 12 Attachment bracket 13 Pin mounting part 14 Fixing base 140 Fixing plate 141 Large diameter part 142 Medium diameter part 143 Small diameter part 144 Screw hole 15 Bolt 16 Bolt 17 Bottom plate 170 Pressing part 2 Parallel Link Device 20 Upper Plate 200, 210 Circular Hole 201, 202 Screw Hole 21 Lower Plate 211, 212 Insertion Hole 22, 23 Bolt 24, 25 Link Member 240, 250 Insertion Hole 26, 27 Bolt 3 Holding Base 30 Mounting Plate 31, 32 Vertical plate 4 Tread machine 40 Side plate 41, 42 Link plate 43 Hydraulic motor 44 Tread plate B Tread work vehicle 5 Backhoe 50 Boom 51 Arm 4a Tread machine 45 Vertical moving body 46 Axis pin 47 Tread plate 48, 49 Hook 6 Tension spring

Claims (8)

(57) [Claims] An attachment (1) which is a stepping device used by being attached to a self-propelled work vehicle and having attachment means for attaching to a work vehicle.
A plurality of treading machines (4) are attached to the attachment (1), and the treading pressure is adjusted by moving the plurality of treading machines (4) to adjust the treading pressure by the treading machine (4). A stepping device comprising a width adjusting means. 2. A treading device used by being attached to a self-propelled work vehicle, comprising: an attachment body having attachment means for attaching to a work vehicle.
A parallel link device (2) provided on the mounting body (1) and rotating in the horizontal direction; and a stepping machine (4) directly or indirectly attached to the parallel link device (2) in a required number. ), Wherein the stepping machine (4) is movable by the parallel link device (2) while maintaining its direction in a predetermined direction. 3. A treading device used by being attached to a self-propelled work vehicle, the attachment body having attachment means for attaching to a work vehicle (1).
A parallel link device (2) provided on the mounting body (1) and rotating in the horizontal direction; and a required number of holding bases provided on the parallel link device (2).
(3) and a stepping machine (4) attached to the holding base (3), and the stepping machine (4) is designed so that the vertical movement is not restricted by the holding base (3). The stepping machine (4) is movable by the parallel link device (2) while maintaining its orientation in a predetermined direction. . 4. The treading device according to claim 2, wherein the treading machine (4) is driven by a hydraulic motor (43). 5. A stepping device to be used by being attached to a self-propelled work vehicle, the attachment body having attachment means for being attached to the work vehicle (1).
And the required number of stepping machines (4) attached to the attachment (1)
The treading machine (4) is provided with a tread plate (47) whose front and rear sides in the traveling direction can swing up and down, and a biasing device that constantly urges the front side of the tread plate upward. And a biasing means. 6. A stepping machine (4) comprising: a tread plate (47) whose front and rear sides in the traveling direction can swing up and down; and urging means for constantly urging the front portion of the tread plate upward. The treading device according to claim 1, 2, 3, or 4, further comprising: 7. A work vehicle, and the work vehicle is attached to the work vehicle.
Or a treading device according to claim 6, characterized in that it comprises a treading work vehicle. 8. A self-propelled work vehicle having an arm whose direction can be adjusted, wherein the self-propelled work vehicle is attached to a tip of the arm.
A treading work vehicle, comprising: the treading device according to 4, 5, or 6.