JPH0444200Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a support device for supporting a flexible spraying hose below a boom, which is used in a wide spreader, etc. for spraying a powdery spray agent. It is something.

[Prior Art] FIGS. 3 and 4 are views of an agricultural riding tractor 12 equipped with a wide spreader 10, viewed from above and from behind. The wide spreader 10 is attached to the rear of an agricultural riding tractor 12 and includes a spraying agent tank 14 that accommodates a spraying agent therein, and a center boom 16 disposed at the rear lower part of the spreading agent tank 14.
and a support boom 18 connected to the end of the center boom 16 so as to be openable/closed and swingable. When not spraying, the support boom 18 is closed and disposed along the side of the agricultural riding tractor 12, and when spraying, the support boom 18 is opened and stretched horizontally along the side of the agricultural riding tractor 12. Served. The flexible spray hose 20 is suspended along the lower part of the center boom 16 and the support boom 18, and is connected at its base end to an outlet 22 of a blower (not shown).
It passes through a support device 24 fixed to the lower surface of the support boom 18 at appropriate intervals in the longitudinal direction, and is pulled to a bracket 26 depending from the tip end of the support boom 18 at the tip end.

FIG. 5 and FIG. 6 respectively show a conventional support device 2.
FIG. 5 is a detailed view of 4 in the longitudinal direction of the support boom 18 and in the direction of FIG. 5; flexible spray hose 20
Spreading ports 28 from which a powdery spraying agent is ejected are bored at appropriate intervals in the longitudinal direction. The hose support 30 includes a hanging part 32 extending in the vertical direction, a ring part 34 that continues from the lower end of the hanging part 32 and supports the flexible spraying hose 20 by being inserted therein, and a ring part 34 that supports the flexible spraying hose 20. It has a plate-shaped attachment part 36 that is integrally fixed to the upper end of the part 32. The bolt 38 is fitted with a spring washer 40, passes through the attachment part 36 and the lower wall of the support boom 18, and is screwed into a nut 42 in the lower wall of the support boom 18 at its tip, connecting the attachment part 36 to the support boom 18. 1
It is tightened to the bottom surface of 8.

The conventional support device 24 thus supports the support boom 1.
It is integrally fixed to the lower surface of 8.

[Problem to be solved by the invention] When the agricultural riding tractor 12 travels over an uneven part of the sprayed field, the support boom 18 tilts with respect to the horizontal direction, and the support device 24 at the tip of the support boom 18 becomes unstable. Although the lower end may come into contact with the ground, the support device 24 of the conventional wide spreader 10 has the following problems.

(a) When the hose support 30 is made of rod wire, flat steel, etc., the hose support 30 is deformed or damaged.

(b) Even when the ring portion 34 of the hose support 30 is made of a nylon tube or the like, since the hanging portion 32 is made of a plastic member such as a rod wire, the ring portion 34 will not be damaged by collision with the ground. Even if the hanging part 32 can be avoided, if the hanging part 32 collides with the ground, problems such as bending or bending will occur in the hanging part 32.

(c) When the ring part 34 is pressed, the ring part 3
Since the flexible spraying hose 20 in the hose 4 is also crushed, the flexible spraying hose 20 may be damaged or the ring portion 34 made of nylon tube may come off from the hanging portion 32 made of rod wire.

(d) Furthermore, if the hose support 30 is made of a highly rigid material, the support boom 1
Cracks may also occur that lead to damage to the 8 itself.

The purpose of this invention is to solve the problems of the prior art, to prevent damage to the support device and the flexible spray hose when the flexible spray hose support device collides with the ground, and to create a structure that can prevent damage to the support device and the flexible spray hose. It is an object of the present invention to provide a support device for a flexible spray hose that is simple.

[Means for Solving the Problems] According to the flexible spray hose support device according to this invention, shaft members projecting downward at appropriate intervals are removably fixed to the lower side edge of the support boom. ,
A ring-shaped holding member having a pointed end at one side edge is rotatably supported on the fan-shaped bulge at one end of the shaft member through a swinging means that can be set to lock and unlock.

[Function] When the support boom is tilted and the support device contacts the ground, the pointed head contacts the ground, which prevents the holding member from directly contacting the ground, and prevents the holding member from directly contacting the ground. The load on the holding member is eased. Further, as the support device comes into contact with the ground, a moment is generated that causes the swinging means to swing relative to the shaft member, and the swinging means is released from the locked state to the fan-shaped bulge and becomes unlocked. state, and the holding member rotates relative to the fan-shaped bulge.

When the support boom returns to the horizontal position, the rocking means is rotated to the vertical position and locked, and the holding member is held in the vertical position.

[Example] Hereinafter, an example of this invention will be described with reference to FIGS. 1 and 2. Note that the same parts as those of the conventional support device 24 shown in FIGS. 5 and 6 are indicated by the same reference numerals, and the explanation thereof will be omitted. The support device 24 according to the embodiment is applicable not only to the wide spreader 10 shown in FIGS. 4 and 5, but also to the wide spreader 10 shown in FIG. It is also applicable to spreaders.

In FIGS. 1 and 2, a hanging shaft 48 as a shaft member is provided with a support for the flexible spray hose 20 via an attachment part 36 at its upper end, similar to the hose support 30 in FIGS. 5 and 6. It is fixed to the lower surface side of the boom 18 and has a fan-shaped bulge 50 at the lower end. The hook shaft 52 is fixed to the hanging shaft 48 near the upper end of the hanging shaft 48 so as to protrude laterally. The swinging support ring 54 includes a hanging portion 56 as a swinging means extending linearly in the vertical direction, and a ring-shaped holding member into which the flexible spray hose 20 is inserted following the lower end of the hanging portion 56. 58. The mounting bolt 60 rotatably supports the upper end of the hanging portion 56 of the swing support ring 54 via the collar 62, passes through the collar 62, and is screwed onto the upper side of the fan-shaped bulge 50 at the tip. ing. The cylindrical portion 64 is provided in the hanging portion 56 above the mounting bolt 60, and a lock ball 66 and a compression coil spring 68 are accommodated in the inner hole of the cylindrical portion 64. The adjustment bolt 70 is screwed into the outer end of the cylindrical portion 64, presses the compression coil spring 68 at its tip, and is prevented from loosening by the lock nut 72. When the swing support ring 54 is in the vertical position,
The lock ball 66 is fitted into a hemispherical recess 74 formed on the upper part of the fan-shaped bulge 50 approximately on the central axis. The tension coil springs 76 are hooked onto the hook shaft 52 and the cylindrical portion 64 at the upper and lower ends, respectively, and bias the cylindrical portion 64 upward. The bumper 78 as a pointed part is formed in a V shape,
It is fixed to the lower end of the holding member 58.

The operation of the embodiment will be explained.

During spraying, when the agricultural riding tractor 12 travels on uneven ground and tilts in the left-right direction, the support boom 18 tilts with respect to the horizontal, and the support device 24
A swing support ring 54 contacts the ground as a lower end portion of the support ring 54 . The bumper 78 prevents the holding member 58 and the flexible spray hose 20 from coming into direct contact with the ground, and also reduces the impact force applied to the holding member 58. With this contact, the force applied to the swing support ring 54 generates a moment that causes the swing support ring 54 to pivot backward or forward around the mounting bolt 60, and the lock ball 66 is disengaged from the recess 74, that is, the swing support ring 54 is rotated backward or forward around the mounting bolt 60. The ring 54 has a fan-shaped bulge 5
0, the swing support ring 54 pivots around the mounting bolt 60 against the tension coil spring 76. As a result, the swing support ring 54 and the flexible spray hose 20 are spared from deformation and damage.

When the agricultural riding tractor 12 passes through the uneven ground and returns to the horizontal position, the restoring force of the tension coil spring 76 returns the swing support ring 54 to the vertical position. As soon as the swing support ring 54 returns to the vertical position, the lock ball 66 is fitted into the recess 74 of the fan-shaped bulge 50 by the biasing force of the compression coil spring 68, so that the swing support ring 54 is pushed into the fan-shaped bulge. It is locked at 50 and held in a vertical position.

If the holding member 58 of the swing support ring 54 is coated with a resin, damage caused by the flexible spray hose 20 coming into contact with the holding member 58 is reduced. The load at which the lock ball 66 comes out of the recess 74 can be adjusted by operating the adjustment bolt 70 to change the preload of the compression coil spring 68.

[Effects of the invention] As described above, according to this invention, even if the boom is tilted and the lower end of the support device contacts the ground, the flexible spray hose can be moved by the pointed head contacting the ground. The inserted holding member is prevented from coming into direct contact with the ground, and the impact force is alleviated, and the swinging means is unlocked from the fan-shaped bulge and rotates. This can prevent the holding member and the flexible spray hose inserted therein from being deformed or damaged.

[Brief explanation of the drawing]

Figures 1 and 2 are views showing a support device according to an embodiment of this invention from the side of the support boom and the direction shown in Figure 1, and Figures 3 and 4 are views of an agricultural machine equipped with a wide spreader. 5 and 6 are detailed views of a conventional support device seen from the longitudinal direction of the support boom and from the direction of FIG. 5, respectively. DESCRIPTION OF SYMBOLS 20...Flexible spraying hose, 48...Drooping shaft (shaft member), 50...Fan-like bulge part, 56...Descent part (swinging means), 58...Holding member, 78...Bumper (tip) head).

Claims (1)

[Claims for Utility Model Registration] (1) A shaft member 48 that protrudes downward at appropriate intervals is removably fixed to the lower side edge of the support boom 18, and a fan-shaped bulge 50 at one end of the shaft member 48 is attached. Rocking means 5 that can be set to lock and unlock
6. A support device for a flexible spraying hose, characterized in that a ring-shaped holding member 58 having one side edge formed with a pointed head 78 is rotatably supported via a support member 58. (2) The flexible spray hose support device according to claim 1, wherein the holding member 58 is coated with a resin. (3) Utility model registration claim 1 or 2, characterized in that an adjustment bolt 70 is provided for adjusting the load for releasing the locked state of the swinging means 56 on the fan-shaped bulging portion 50. A support device for a flexible spray hose according to item 2.