JP2005198592A - Fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixture capable of maintaining the fixed state of a tillage tine to a flange part. <P>SOLUTION: The fixture 40 has a plate 41 having hole parts 51 for head parts of bolts, the two bolts 42 having the head parts 52 fitted in the hole parts 51 for the head parts of the bolts, and two nuts 43 to be screwed on the bolts 42. When fixing the tillage tine 36 to the flange part 33, the tillage tine 36 and the flange part 33 are nipped by the nuts 43 contacting with the flange part 33 through washers 44 and the head parts 52 of the bolts directly contacting with the tillage tine 36. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fixing tool for fixing a tilling claw to a flange portion of a tilling shaft.

  Conventionally, for example, a fixture (cultivating claw attaching device) 1 shown in FIG. 7 is known.

  This fixing tool 1 is for fixing the tilling claw 2 to the flange part 4 of the tilling shaft 3, and this fixing tool 1 includes one plate 7 having a bolt shaft hole 6 and a bolt shaft part. Two bolts 9 having a bolt shaft portion 8 fitted into the hole 6 for use and two nuts 10 screwed to the bolt 9 are provided. The plate 7 is softer than the bolt 9, the tilling claw 2, and the flange portion 4.

As shown in FIG. 7, when the tilling claw 2 is fixed to the flange portion 4, a nut 10 is screwed onto the bolt 9, and the screwed nut 10 and the tilling claw 2 are brought into contact with each other via the plate 7. The tilling claw 2 and the flange portion 4 are clamped by the bolt head 11 in contact (see, for example, Patent Document 1).
JP-A-9-285203

  However, in the configuration in which the plate 7 is interposed between the tilling claw 2 and the bolt head 11 as in the conventional fixture 1, the tilling claw 2 repeatedly receives external force during the tilling operation, for example, as shown in FIG. As a result, the plate 7 sags, and the bolt 9 is loosened by this sag, and as a result, the fixing force by the fixture 1 may be reduced.

  This invention is made | formed in view of such a point, and it aims at providing the fixing tool which can suppress the fall of fixing force and can maintain the fixing state to the flange part of a tilling nail appropriately.

  The fixing device according to claim 1 is a fixing device for fixing a tilling claw to a flange portion of a tilling shaft, and is fitted into a plate having a bolt head hole and the bolt head hole. A plurality of bolts having a bolt head and a plurality of nuts screwed to the bolts, and when the tilling claw is fixed to the flange portion, the nuts are screwed to the bolts and screwed to the bolts. The tilling claw and the flange portion are sandwiched between the nut and the bolt head that is in direct contact with the tilling claw.

  When the tilling claw is fixed to the flange portion, the nut is screwed to the bolt, and the tilling claw and the flange portion are sandwiched between the screwed nut and the bolt head that is in direct contact with the tilling claw. The fall of fixing force is suppressed and the fixed state to the flange part of a tilling nail is maintained appropriately.

  According to a second aspect of the present invention, in the fixing device according to the first aspect, the nut comes into contact with the flange portion via a washer.

  Then, by fixing the nut to the flange portion via the washer and directly contacting the bolt head to the tilling claw, the fixed state of the tilling claw to the flange portion can be appropriately maintained.

  According to the fixture of the first aspect, when the tilling nail is fixed to the flange portion, the nut is screwed onto the bolt, and the tilling nail is composed of the screwed nut and the bolt head directly in contact with the tilling nail. And the flange portion are sandwiched, the reduction of the fixing force can be suppressed, and the fixing state of the tilling claw to the flange portion can be appropriately maintained.

  According to the fixture of claim 2, the nut is brought into contact with the flange portion through the washer, and the bolt head is brought into direct contact with the tilling nail, thereby appropriately fixing the tilling nail to the flange portion. Can be maintained.

  An embodiment of the fixture of the present invention will be described with reference to the drawings.

  In FIG. 1, reference numeral 21 denotes an agricultural machine. The agricultural machine 21 is connected to a tractor (not shown) that is a traveling vehicle and performs a tilling work while moving forward by the traveling of the tractor. is there.

  The farm work machine 21 includes a machine body 22 connected to a three-point link portion of the tractor.

  The machine body 22 is provided with a rotary type tilling means 25 that performs tilling work while rotating in a predetermined direction by power from the input shaft 23 side, and a leveling means 26 that performs leveling work at a position behind the tilling means 25. .

  The tillage means 25 includes a tillage shaft 31 having an axial direction in the left-right direction. The tilling shaft 31 has a shaft body portion 32 that is long in the left-right direction and circular in cross section, and a plurality of substantially plate-like flange portions 33 are spaced apart in the axial direction on the outer peripheral side of the shaft body portion 32. It is installed side by side.

  Further, a plurality of substantially plate-shaped tilling claws 36 having a predetermined shape are radially fastened to each flange portion 33 of the tilling shaft 31. That is, each cultivating claw 36 is detachably fixed to the flange portion 33 of the cultivating shaft 31 by a fixture 40 as a cultivating claw fixing device. The tilling claws 36 and the flange portions 33 are respectively formed with bolt insertion holes 39.

  Here, as shown in FIG. 2 to FIG. 5, the fixture 40 has a metal-made bolt connection plate 41 having arcs at both ends, and a longitudinal end of the plate 41. A plurality of fixed metal pieces, for example, two bolts (for example, hexagon bolts) 42, a plurality of metal pieces to be screwed to the bolts 42, for example, two nuts (for example, hexagon nuts) 43, and a metal corresponding to the nut 43 A plurality of, for example, two washers 44 are provided. The single plate 41 and the two bolts 42 constitute a set of bolts 50 that can handle two (a plurality of) bolts 42 simultaneously.

  The plate 41 has two hexagonal bolt head hole portions 51 formed on both ends in the longitudinal direction.

  The bolt 42 has a hexagonal bolt head 52 and a bolt shaft portion 53 that protrudes from the bottom surface of the bolt head 52 and has a thread groove 54 formed on the outer peripheral surface on the tip end side. The bolt head 52 is fixedly fitted into the bolt head hole 51 of the plate 41, and the bottom surface of the bolt head 52 and the back surface of the plate 41 (surface on the side in contact with the tilling claw 36) are substantially the same surface. Located on the top. That is, the bolt head 52 of the bolt 42 is fixed in a state of being embedded in the bolt head hole 51 of the plate 41, as is apparent from FIG. The hexagonal bolt head hole 51 of the plate 41 is formed in a shape into which the hexagonal bolt head 52 is fitted.

  When the tilling claw 36 is fixed to the flange portion 33, the nut 43 is screwed into the screw groove 54 of the bolt shaft portion 53 of the bolt 42. As a result, the nut 43 is screwed to the flange portion 33 via the washer 44. The cultivating claw 36 and the flange portion 33 of the cultivating shaft 31 are sandwiched between the abutting nut 43 and the bolt head 52 fitted in the bolt head hole 51 and directly in contact with the cultivating claw 36. It has become.

  Next, a case where the tilling claw 36 is fixed to the flange portion 33 of the tilling shaft 31 using the fixing tool 40 will be described.

  After the bolt insertion hole 39 of the flange portion 33 of the tillage shaft 31 and the bolt insertion hole 39 on the proximal end side of the tillage claw 36 are opposed to each other, the assembly bolt 50 2 is inserted into the opposed bolt insertion hole 39. Insert the bolt 42 of the book.

  Next, after the washer 44 is positioned on the outer peripheral side of the bolt shaft portion 53 of the bolt 42, two nuts 43 are respectively screwed into the thread grooves 54 of the bolt shaft portion 53 using a tool (not shown).

  As a result, the flange portion 33 and the tilling claw 36 that overlap each other are sandwiched between the nut 43 that is in contact with the flange portion 33 via the washer 44 and the bolt head 52 that is in direct contact with the tilling claw 36, thereby The tilling claw 36 is firmly fixed to the flange portion 33 of the tilling shaft 31 with a desired fixing force.

  When removing the tillage claw 36 from the flange 33 when replacing the tillage claw 36, etc., the nut 43 and the washer 44 are removed from the two bolts 42 of the assembled bolt 50, so that the fixing with the fixture 40 can be easily released. it can.

  According to the fixing tool 40, when the tilling claw 36 is fixed to the flange portion 33, the nut 43 that is in contact with the flange portion 33 via the washer 44 and the bolt head 52 that is in direct contact with the tilling claw 36 Since the tilling claw 36 and the flange portion 33 are clamped from both sides, for example, even if an external force is repeatedly applied to the tilling claw 36, the plate 41 does not sag, and thus the reduction of the fixing force by the fixture 40 is suppressed. And the state in which the tilling claw 36 is fixed to the flange portion 33 can be appropriately maintained.

  Further, for example, as shown in FIG. 6, even if the plate 41 of the assembled bolt 50 of the fixture 40 is deformed into a curved shape, and the substantially entire plate 41 is separated from the tilling claw 36, the bolt head 52 is attached to the tilling claw 36. It remains in direct contact and the fixing force by the fixing tool 40 is not greatly reduced.

  In the above embodiment, the case where the nut 43 is brought into contact with the flange portion 33 via the washer 44 has been described. However, for example, the nut 43 is directly brought into contact with the flange portion 33 without using the washer 44. May be.

  The assembled bolt 50 may have three bolts 42, or may have four or more bolts 42.

It is a side view of a farm working machine provided with the fixture of the present invention. It is a figure which shows the state by which the tilling nail was fixed to the flange part of the tilling axis | shaft with the fixing tool same as the above. It is a figure which shows the state by which the tilling nail was fixed to the flange part of the tilling axis | shaft with the fixing tool same as the above. It is a front view of the assembled bolt of a fixing tool same as the above. It is a side view of the assembled bolt of a fixing tool same as the above. It is a figure which shows the state which the plate of the fixing tool same as the above deform | transformed. It is a figure which shows the conventional fixing tool. It is a figure which shows the state in which the plate of the conventional fixing tool was sag.

Explanation of symbols

31 Tillage shaft
33 Flange
36 tillage nail
40 Fixture
41 plates
42 volts
43 Nut
44 Washer
51 Bolt head hole
52 bolt head

Claims (2)

A fixing tool for fixing the tilling nail to the flange portion of the tilling shaft,
A plate having a bolt head hole;
A plurality of bolts having bolt heads fitted into the bolt head holes;
A plurality of nuts screwed onto the bolt;
At the time of fixing the tilling claw to the flange portion, the nut is screwed to the bolt, and the tilling claw and the flange portion are formed by the screwed nut and the bolt head directly in contact with the tilling claw. And a clamp. The nut according to claim 1, wherein the nut abuts on the flange portion via a washer.

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