JPS6136604Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a trench filling machine that enables stable trench filling work to be performed well, prevents damage to the screw body, and eliminates work marks on the sides of the trench after work. The purpose is to be able to do it flatly.

Conventionally, a trench filling machine equipped with a screw body for backfilling is towed by a tractor, and the excavated soil discharged from both sides of the trench is backfilled into the trench by the rotary driven screw body, thereby performing trench filling work. I was doing it. For example, there is a burying machine shown in Japanese Patent Application Laid-open No. 53-46142, which is equipped with a single auger shaft rotatably and a chain transmission mechanism on one side. It is said to be a side drive system. The auger shaft is provided with augers in opposite directions on both sides, leaving a space of an appropriate width in the center. Also, on both sides of the auger frame, there are sled-shaped parts as ground stabilizing bodies. According to the trench filling machine having the above structure, the auger shaft is towed in a state parallel to the ground surface, and therefore both augers are also towed in a state parallel to the ground surface. However, although the distance between the auger and the ground surface is approximately constant over the entire length, the ground surface on both sides of the trench is usually uneven, and the auger excavates the unexcavated soil in the convex areas. causing damage or
There is a high risk that the auger will tilt over the unexcavated soil of the convex part, making it impossible to perform stable trench filling work, and leaving work marks after trench filling work in an uneven shape in the longitudinal direction of the trench. There was a great risk that the finish would be poor. Furthermore, since the ground stabilizing body is curved, there is a drawback that resistance during towing is also large.

Therefore, this invention has solved the above problems, and its feature is that a pair of left and right backfilling screw bodies are extended on both sides of the lower part of the transmission case installed in the center of the machine frame. In a trench filling machine in which the excavated soil discharged from both sides of the groove is filled back into the trench using these screw bodies, both of the screw bodies have screw portions having the same diameter in the longitudinal direction of the shaft, and the outer end The screw body 11 is extended laterally in a downwardly inclined position with its side lowered, and a gauge ring is provided at the outer end of the shaft portion 23 of each screw body 11 so as to be concentric with each shaft portion 23 and can roll freely. At the point.

Hereinafter, a first embodiment of the present invention will be described based on the drawings of FIGS. 1 to 4. In FIGS. 1 and 2, 1 is a tractor body, and a hydraulic system for lifting and lowering a working machine (not shown) A groove filling machine 3 is mounted at the rear of the vehicle body 1 via a three-point link mechanism 2 so as to be movable up and down. The three-point linkage mechanism 2 consists of a central top link 4 and a pair of left and right lower links 5.
Each link 4, 5 has a ball joint part 6, 7 at its front and rear ends. 8 is a check chain, and 9 is a rear wheel. The groove filling machine 3 includes a machine frame 10 and a pair of left and right backfilling screw bodies 11 provided on both sides of the lower part of the machine frame 10.
and a pair of left and right gauge wheels 12. Machine frame 1
0 includes a transmission case 13 installed vertically in the center, a top mast 14 projecting obliquely forward and upward from the transmission case 13, support arms 15 extending laterally from both sides of the upper part of the transmission case 13, and these. It is comprised of a pair of left and right brackets 16, etc., which project forward from the outer end of each arm 15. The transmission case 13 has an input shaft 17 on the upper part, and the input shaft 1
7 is connected to the tractor via a universal joint shaft (not shown).
It is interlocked and connected to the PTO shaft 18. Input shaft 17
When power is transmitted from the tractor, both screw bodies 11 are rotationally driven via the transmission mechanism within the transmission case 13. Top mast 14 has top link 4
are pivotally connected. As shown in FIGS. 3 and 4, an elevating plate 20 is pivotally supported on the distal end side of the bracket 16 via a horizontal shaft 19 so as to be able to swing up and down. It is regulated within a predetermined angle by a pair of upper and lower stoppers 21 that are fixed to the. A mounting pin 22 is attached to the tip of the lifting plate 20.
A lower link 5 is pivotally connected via the lower link 5. The screw body 11 is removably attached to both sides of the lower part of the transmission case 13, and extends laterally from both sides in a downwardly inclined position with the outer end side lowered. The screw body 11 consists of a shaft portion 23 and a screw portion 24 having the same diameter in the longitudinal direction of the shaft. Each gauge ring 12 is attached to the outer end of the screw body 11.
This equipment is either fixed concentrically or freely rotatable via a bearing.
This is done by providing the gauge wheel 12 at the extended outer end of the shaft portion 23, or by inserting a support shaft provided on the gauge wheel 12 side into the shaft portion 23. Note that the gauge wheels 12 have a diameter smaller than the outer diameter of the screw body 11 by 2l to prevent each screw body 11 from coming into contact with the ground when both gauge wheels 12 are grounded on a flat ground.

Next, the effect will be explained. When backfilling the excavated soil discharged on both sides of the groove 26 into the groove 26 in which the drainage pipe 25 has been laid, each front wheel and rear wheel 9 of the tractor are placed in the groove 26.
The tractor is placed on both sides so that the tractor straddles the groove 26, and the transmission case 13 of the groove filling machine 3 is placed in the groove 26.
The gauge wheels 12 on the left and right are placed above and grounded on the unexcavated soil on both sides of the groove 26. Next, when the groove filling machine 3 is towed by a tractor while rotating the left and right screw bodies 11, the screw bodies 11 move into the groove 26.
The excavated soil on both sides is transferred and backfilled into the trench 26. By the way, during the above work, the left and right gauge wheels 1
2 rolls on the unexcavated soil on both sides of the trench 26 together with the screw body 11 or separately from the screw body 11, so there is little resistance during towing, and the trench filling machine 3
is maintained at a constant height and in a constant posture, so that the screw body 11 can reliably transfer the excavated soil and backfill it into the groove 26. Furthermore, both screw bodies 11 are provided in a downwardly inclined position with their outer ends lowered, and gauge wheels 12 are provided at both outer ends, so that only the gauge wheels 12 on both sides are left unused. The excavated soil is rolled, and the distance between both screw bodies 11 and the ground surface gradually increases as they approach the center.
This eliminates the possibility that the screw body 11 excavates the unexcavated soil below the excavated soil, and the screw body 11 can smoothly move the excavated soil toward the center with less resistance.

Therefore, there is no possibility that the screw body 11 etc. will be damaged or the roots of fruit trees on both sides of the groove 26 will be damaged. Also, the front wheels and rear wheels 9 of the tractor are in the groove 2.
6. Since the tractor rolls on the excavated soil on both sides, the tractor tends to tilt left and right, but since the trench filling machine 3 is firmly grounded on the unexcavated soil with the gauge wheels 12 on both sides, even if the lower link 5 Even if it is directly pivoted to the bracket 16 as usual, the trench filling machine 3 is not easily affected by the tilting of the tractor and maintains a substantially constant height and a substantially constant posture. The screw body 11 reliably transports excavated soil at all times, eliminates the need to excavate unexcavated soil, and allows stable trench filling work to be performed well.
The work marks after the groove filling work are flattened in the longitudinal direction of the groove 26, resulting in a good finish. In addition, during the above work, the lifting plate 20 actually operates as described below, so the tilting of the tractor to the left and right has no effect on the trench filling machine 3, and the trench filling machine 3 remains at a constant height. The trench filling work as described above is performed while maintaining a constant posture. That is, for example, when the tractor tilts to the left, the left lifting plate 20 lowers, and even if the right lifting plate rises, each link 4,
By also assisting the functions of the ball joint parts 6 and 7 in 5,
The tilting motion of the tractor is not absorbed and transmitted to the trench filling machine 3 side, and even when the tractor tilts to the right, the lifting plate 20 operates in the same manner as described above and does not affect the trench filling machine 3. It is. Furthermore, since the gauge ring 12 is attached using the shaft portion 23 of the screw body 11, no attachment member is required, and the number of parts can be reduced. In addition, both screw body 1
When the distance between 1 and the ground surface gradually increases as it approaches the center, if the diameter of the screw part of the screw body gradually decreases as it approaches the center, the structure of the screw body becomes Although it is complicated, difficult to manufacture, and high in cost, the screw part 2 having the same diameter in the longitudinal direction of the shaft as in the present invention
If the screw body 11 having the screw body 11 is configured in a downwardly inclined position with its outer end side lowered, the structure of the screw body is simple, its manufacture is easy, and manufacturing costs can be reduced.

FIG. 5 shows a second embodiment of the present invention, in which a support shaft 27 is fixedly fixed to the gauge wheel 12 in a concentric manner, or the support shaft 27 supports the gauge wheel 12 so as to freely rotate. A plurality of adjustment holes 28 are formed through the support shaft 27 at equal intervals in the axial direction. The support shaft 27 is removably inserted into the outer end of the hollow shaft portion 23 of the screw body 11, and when the fixing pin 29 inserted into the shaft portion 23 is inserted into the adjustment hole 28, the gauge is adjusted. A ring 12 is provided on the screw body 11 so as to be movable and adjustable in its axial direction.

In the second embodiment, by adjusting the movement of the gauge wheel 12, the groove filling machine 3 can be adjusted in the vertical direction.
Thereby, the amount of excavated soil transferred by the screw body 11 can be adjusted. As a result, when a permeable material such as rice husks is put into the trench 26, it can be backfilled into the excavated soil 26 by a predetermined amount corresponding to the amount set according to the various conditions. The groove 26 can be satisfactorily filled regardless of the amount, and backfill marks can be prevented from rising.

In the embodiment, the outer diameter of the gauge ring is the same as or smaller than the outer diameter of the screw body, but the outer diameter of the gauge ring may be larger than the outer diameter of the screw body.

As described above, according to the present invention, both screw bodies provided on both sides of the lower part of the transmission case have the screw parts having the same diameter in the longitudinal direction of the shaft, and are in a downwardly inclined position with the outer end side lowered. The gage wheel extends out to the side, and a gage ring is provided at each outer end so that it can roll freely and concentrically with each screw body. It can be maintained at a constant height and in a substantially constant posture, and since the gauge wheels roll, there is little traction resistance.Furthermore, the distance between both screw bodies and the ground surface gradually increases as they approach the center, and the groove It is possible to prevent the screw body from interfering with the unevenness of the ground surface on both sides, and there is no fear that the screw body will excavate the unexcavated soil below the excavated soil, and the screw body can move the excavated soil toward the center smoothly with little resistance. can be done. Therefore, stable trench filling work can be carried out well, damage to the screw body can be prevented, and work marks can be leveled out, which is of great practical benefit. Furthermore, since the gauge ring is mounted using the shaft of the screw body, there is no need for a gauge wheel mounting member, which reduces the number of parts, and the structure of the screw body is simple, reducing manufacturing costs. play an advantage.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the first embodiment of the present invention, Figure 2 is a rear view of the same, Figure 3 is a view taken in the direction of the arrow in Figure 1, Figure 4 is a perspective view of Figure 3, and Figure 5. FIG. 2 is a partial rear view showing a second embodiment of the present invention. 3... Grooving machine, 10... Machine frame, 11... Screw body for backfilling, 12... Gauge ring, 13... Transmission case, 26... Groove.

Claims (1)

[Scope of utility model registration request] A pair of left and right screw bodies 11 for backfilling are installed on both sides of the lower part of the transmission case 13 provided in the center of the machine frame 10.
In the trench filling machine 3, the screw bodies 11 are provided with screw bodies 11 projecting out from both sides of the groove 26, and the excavated soil discharged from both sides of the groove 26 is filled back into the groove 26. It has a screw part 24 with a diameter and extends laterally in a downward position with the outer end side lowered, and is attached to the outer end of the shaft part 23 of each screw body 11 in a concentric manner with each shaft part 23. A groove filling machine characterized in that a gauge wheel 12 is rotatably provided.