JPH033652Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a scarf eye mounting structure for a box scraper for a tractor, which securely fixes a large number of scarf eyes, and by mounting them vertically movably, it is possible to accommodate them all at once. The main purpose is to improve soil leveling ability.

Conventionally, box scrapers for tractors have been disclosed in Japanese Utility Model Application Publication No. 54-101121.

As shown in Fig. 1, in this conventional example, a box scraper 2, which is connected to a tractor via a link mechanism 1 so as to be able to rise and fall freely, collects soil on the rear side between a pair of left and right side plates 4 fixed to both ends of a tool bar 3. The tool bar 3 has a plate 5, and a large number of scarf eyes 6 are erected on the tool bar 3 at predetermined intervals in the left and right direction, and a notch 6A formed in each of the scarf eyes 6 is engaged with an edge of the insertion hole 3A of the tool bar 3. It was also fixedly attached via a wedge 7.

According to this conventional example, since the tip point 6B of the scarf eye 6 is thrust into the ground and scrapes the topsoil, the formation of the notch 6A is disadvantageous.

In addition, since the box scraper 2 is fixed with a wedge 7, the box scraper 2 is lifted up via the link mechanism 1 when not in operation, but at this time, there is a risk that each point 6B etc. may hit the tractor's wheel lugs and cause damage. However, it is a very troublesome task to attach and detach each scarf eye 6 by inserting and removing the wedge 7.

Therefore, the inventor of the present invention previously proposed a tool bar in which a scarf eye mounting bar, in which a large number of scarf eyes are inserted and supported, is rotatably and fixedly attached. When large stones were mixed directly into the earthen board,
In addition, during use (working position), a large stress concentration occurred around the pivot point, resulting in insufficient strength.

The present invention was devised in order to eliminate the defects of the conventional example and the rotary type shown above, and therefore,
In the present invention, a mulch plate is provided on the rear side between a pair of left and right side plates connected to each other by a tool bar, and a number of scarf eyes are erected at a predetermined interval in the left and right direction in front of the mulch plate and between the side plates. A box scraper is connected to a tractor via a link mechanism so that it can be raised and lowered, and a scarf eye mounting bar in which a large number of scarf eyes are inserted and supported is provided on the rear side of the tool bar 3 so as to be movable in the vertical direction. The tool bar is provided with a locking mechanism for fixing and supporting each tip point in a working position in which it plunges into the ground, and in a non-working position in which each of the points is positioned near the lower end of the side plate from the working position, and furthermore, the tool bar is provided with a locking mechanism that fixes and supports each point in a working position in which the tip points are plunged into the ground, and in a non-working position in which each of the points is positioned near the lower end of the side plate. The tool bar is characterized in that the tool bar is provided with a receiving portion that receives the excavation reaction force in the posture.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 2, reference numeral 10 denotes a box scraper, which is connected to the front or rear part of a tractor (not shown) via a link mechanism 11 shown as a three-point link so as to be able to rise and fall.

The box scraper 10 has a pair of left and right side plates 13, 13 erected and fixed facing each other at both ends of a tool bar 12 made of two angle pieces.
On the rear side between the side plates 13, 13 there is a lower cutting edge 14A.
A shoring plate 14 slightly protruding from the lower edge of the side plates 13, 13 is fixedly provided.

Note that the shoring plate 14 has a curved surface portion 14B, and the cutting edge 14A is formed by removably fixing the blade with a sinking bolt or the like.

A mast 15 is erected at the middle part of the tool bar 12 in the longitudinal direction, and brackets 16 are fixedly fixed to both sides of the mast 15 in a forward protruding manner. The left and right lower links 11B of the link mechanism 11 are each detachably attached.

As shown in FIG. 5, on the rear side of the tool bar 12, a box-shaped bracket 17 that projects rearward and passes through the top and bottom is fixed in the vicinity of both ends thereof. The shaft 18 is fixed by a stopper 19.

Reference numeral 20 denotes a scarf eye mounting bar, which is mounted so as to be vertically movable around the horizontal shaft 18.

That is, the mounting bar 20 is made of an angle material, and triangular reinforcing plates 21 are fixed to both ends and the middle of the mounting bar 20. Near both ends, the mounting bar 20 is superimposed on the inside or outside of the bracket 17 of the tool bar 12, and is attached to the horizontal shaft 18. A bracket 22 is vertically supported.

The bracket 22 has a long hole 2 in the vertical direction.
2A, a horizontal shaft 18 is inserted and supported in the elongated hole 22A, and a scarf eye mounting bar 20 is vertically movable within the range of the elongated hole 22A using the horizontal shaft 18 as a guide.

Further, the mounting bar 20 is formed with a number of insertion holes 24 for scarf eyes 23 at intervals in the longitudinal direction, and the scarf eyes 23 are inserted into each of the insertion holes 24, and a caul plate 25 and a bolt 26 are inserted into each of the insertion holes 24. Supported through.

Further, the front surface of the bracket 22 is in surface contact with the rear surface of the tool bar 12, so that the digging reaction force is received on the tool bar 12 side, and the rear surface of the tool bar 12 is used as a receiving part for receiving the reaction force. .

27 is a locking mechanism, and the working posture 29 is such that the tip point 28 of the scarf eye 23 is plunged into the ground.
The point 28 is retracted upward from the working position 29 within the range of the elongated hole 22A, and the point 28 is moved upward from the side plate 13.
The non-working position 30 is located near the lower end 13A of the workpiece.

In this embodiment, as shown in FIGS. 3 and 6, a horizontal shaft 31 is installed at the lower part of the mast 15 in front of the tool bar 12, and a lock arm 32 is attached to the horizontal shaft 31.
A cylinder boss 33 on the upper side of the lock arm 32 is rotatably fitted into the sleeve, and the front end of the scarify eye mounting bar 20 is attached to a wedge portion 34 formed on the lower side of the lower side of the lock arm 32 in the working position 29, as shown in FIG. As shown in FIG.
0 is placed on board as shown by the chain line in FIG.

That is, the lock arm 32 is rotatable about the horizontal shaft 31 as a fulcrum.

Furthermore, a switching lever 35 that can be operated from the driver's seat of a tractor (not shown) is pivotally supported on the lock arm 32 to a cylinder boss 33 via a longitudinal shaft 36.
The switching lever 35 is inserted into an L-shaped guide hole 38 shown in FIG. 4 of a lever guide plate 37 installed between the masts 15.
The lever 35 is engaged in the front-back direction with the horizontal hole 38A of No. 8 to position the lock arm 32, and when the switching lever 35 is switched in the direction of arrow (A) in FIG. 4 with the shaft 36 as a fulcrum, the switching lever 35 becomes free in the front and back direction (B) at the front and rear holes 38B of the guide hole 38, and swings the lock arm 32 by its own weight in the direction of the arrow (C) in FIGS. 2 and 6 with the horizontal shaft 31 as a fulcrum. is being used.

In addition, in FIG. 2, reference numeral 39 denotes a leveling blade, which is supported at the rear of the shoring board 14 so as to be able to swing around a support shaft 40 at the top thereof.
1 is the stopper.

Next, the action will be explained.

FIG. 2 shows a working posture 29 in which the point 28 of each scarifier eye 23 has plunged into the ground. In this state, when the box scraper 10 is moved in the direction of arrow F by running the tractor, the point 28 As a result, the topsoil must be scraped or cut.

Then, the earth-harvesting work is carried out by the earth-harvesting board 14, and at this time, the earth-leveling blade 3
9 is retracted using the support shaft 40 as a fulcrum.

During this earth-filling work, each scarifai 2
3, a considerable load will be applied to the tool bar 12, but since the backing plate 25 is overlapped with the mounting bar 20, no large force will be applied to the insertion hole 24, and the bracket 22 will not be applied to the tool bar 12. Since the mounting bar 20 is engaged with the wedge portion 34 of the lock arm 32, the scarf eye 23
load is distributed.

To change and fix the scarify eye 23 to the non-working position 30, such as when doing ground leveling work by moving the ground leveling blade 33 in the direction of arrow R or F in FIG. From the driver's seat, switch the shaft 36 in the direction of the arrow (A) as a fulcrum, swing the lock arm 32 in the direction of the arrow (C) with its own weight around the horizontal shaft 31 as a fulcrum to unlock it, and move the point 28 to the hard disk (G). The scarf eye 23 is moved upward as a relative movement through the guide of the elongated hole 22A and the horizontal shaft 18 so as to be in the non-working position 31 so as to be in contact with and supported by the scarf eye mounting bar 20.
When the lower surface 20A of the lock arm 32 is above the upper surface 32A of the lock arm 32, move the switching lever 35 in the direction indicated by the arrow (B).
The lower surface 20A of the bar 20 is placed on the upper surface 32A of the lock arm 32 by pulling it in the opposite direction and swinging it in the opposite direction to the arrow (A) direction.

Even if it is moved in the direction (F) in this state, since the point 28 of the scarify eye 23 is close to the hard disk or the ground (G), stones will not collide with or get caught in the earthen board 14. It is.

In order to return to the working position 29, the lock arm 32 of the lock mechanism 27 is rotated in the direction of arrow C, and the bar 20 having the scarf eye 23 is lowered by its weight through the elongated hole 22A on the horizontal shaft 18. Become.

In the present invention, the mounting bar 20, which supports and inserts a large number of scarf eyes 23 into the tool bar 12 connecting the left and right side plates 13, 13, is movable up and down. The scarf eyes 23 can be handled all at once, and work efficiency can be improved.

And Scarifeye 23 has its working posture 29
Since a locking mechanism is provided to fix and hold the tractor in the non-working position 30, the workability can be significantly improved, and since the scarf eye 23 can be stored in the box, running safety is also improved, and the tractor can be operated safely. It won't damage your wheels or jeopardize your savings.

Furthermore, since the tool bar 12 absorbs the excavation reaction force or load during work, it is highly durable.
8 is positioned near the lower end of the side plate 13, so stones will not get caught in the groin plate 14.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of the conventional example, Fig. 2 is a side sectional view showing the embodiment of the present invention, Fig. 3 is a front view of the lock mechanism, and Fig. 4 is Fig. 3 E-E. FIG. 5 is a partially omitted cross-sectional view of the arrow H in FIG. 10... Box scraper, 11... Link mechanism, 12... Tool bar, 13... Side plate, 14
...Soil plate, 18...Horizontal axis, 20...Scarf eye mounting bar, 23...Scarf eye, 28...
...Point, 27...Lock mechanism, 29...Working posture, 30...Non-working posture.

Claims (1)

[Claims for Utility Model Registration] A mulching plate 14 is provided on the rear side between a pair of left and right side plates 13 connected to each other by a tool bar 12, and a large number of scarf eyes 23 are arranged on the left and right in front of the mulching plate 14 and between the side plates 13. Box scrapers 10, which are vertically arranged at predetermined intervals in the direction, are connected to a tractor via a link mechanism 11 so as to be able to rise and fall freely, and a large number of scarf eyes 23 are inserted and supported on the rear side of the tool bar 12. A scarf eye attachment bar 20 is provided to be movable in the vertical direction, and a working position 29 in which each tip point 28 of the scarf eye 23 is plunged into the ground, and a non-working position in which each point 28 is positioned near the lower end of the side plate 13 from the working position 29. For a tractor, the tool bar 12 is provided with a locking mechanism 27 for fixed support in each of the positions 30 and 30, and a receiving part for receiving the digging reaction force of the scarf eye 23 in the working position 29 is provided on the tool bar 12. The scarf eye mounting structure of the box scraper.