JP2575513B2 - Cover device for rotary tiller - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cover device for a rotary tiller having an elastic cover.

(Prior Art) Japanese Patent Application Laid-Open No. 52-136007 (first prior art) discloses a conventional technique for absorbing the impact of scattered soil and preventing soil adhesion with an elastic cover. An elastic cover is arranged on the inner surface side of the iron plate cover fixed to the frame, and this elastic cover is bolted to the iron plate cover at the front, rear, and halfway, and hangs between the fixing positions.

In Japanese Unexamined Utility Model Publication No. 1-56601 (second prior art), a rubber rear cover is connected to a rear portion of an upper iron plate cover, and a locking portion is formed in the middle of the rubber cover. The elastic resin plate which covers the connecting portion from inside is detachably mounted.

In Japanese Utility Model Publication No. Sho 60-10325 (third prior art), an elastic plate is attached to the inner surface of an upper iron plate cover and its front and rear portions are attached. The flexible cover member is pressed inward by a spring fitted into a bolt to form a gap between the inner surface of the upper iron plate cover and the flexible cover member.

In Japanese Utility Model Laid-Open Publication No. 62-86802 (fourth prior art), a flexible cover member is provided along the inner surface of an upper iron plate cover, and its front and rear portions are fixed by bolts. Part is formed.

(Problems to be Solved by the Invention) In the first prior art, the hanging portion of the elastic cover can absorb the impact of the scattered soil and prevent the soil from adhering. However, when the scattered stone collides, the hanging portion becomes the iron plate cover. And the elastic cover is squeezed with shattered stone and iron plate cover, which not only breaks itself,
The iron plate cover may also be damaged or generate vibration and impact noise.

In the second prior art, the elastic resin plate can prevent soil adhesion and the like, but the front and rear ends of the elastic resin plate are merely locked so as to prevent the front and rear outward movement.
Since the forward / backward inward movement is not prevented, there is a possibility that a collision with scattered stones or the like causes the iron plate cover to come into contact with the iron plate cover or to come off from the locking portion.

Also in the third prior art, the flexible cover member can prevent soil adhesion and the like. However, since the flexible cover member is pressed inward by a spring, the flexible cover member is hit by scattered stones or the like. The member may move inward and outward and come into contact with the iron plate cover, and since the bolt is inserted through the iron plate cover, the bolt may swing and the flexible cover member may also move in the front-rear direction. In addition, the amount of deformation and movement of the flexible cover member is large, and even if a gap is formed, the flexible cover member easily comes into contact with the iron plate cover.

In the fourth prior art, a rib is provided on the upper iron plate cover to form a cavity between the upper cover and the flexible cover member. However, the flexible cover member is not fixed to the front and rear halfway ribs. The flexible cover member may be deformed and moved between the front and rear by collision of flying stones and the like, and may contact the iron plate cover. If the rib is not tall, the flexible cover member may be damaged. It's easier.

Further, in the first, third and fourth prior arts, in order to fix the elastic cover before and after and in the middle of the iron plate cover, the bolt penetrates and the bolt head or nut is exposed to the inner surface side from the elastic cover. In addition, there is a problem that the elastic cover is easily damaged from the through hole, and the bolts and nuts are damaged by flying stones, making it difficult to replace the elastic cover.

That is, in the prior art, it is not possible to reliably limit the deformation and movement of the elastic cover between the mounting positions before and after and in the middle, and the gap between the mounting position and the iron plate cover is always kept constant. It is difficult to prevent the elastic cover from coming into contact with the iron plate cover even when the stone collides.

The present invention regulates the position of the elastic cover with respect to the plate cover in the front-rear direction and inward / outward direction through the gap forming and mounting means at the mounting positions at the front, rear, and halfway so that the elastic cover follows the non-hanging state while interposing a gap. Accordingly, an object of the present invention is to provide a cover device of a rotary cultivator that is less likely to be damaged by limiting deformation movement even when a stone collides.

Further, the present invention provides an elastic cover on the inner surface side of the plate cover, which regulates the position of the elastic cover in the front-rear direction and the inward / outward direction through the gap forming / attaching means through the gap forming / attaching means, and along the non-sagging state. By forming the mounting means with an engaging portion on the inner surface of the plate cover and an engaging portion on the outer surface of the elastic cover,
An object of the present invention is to provide a cover device for a rotary cultivator in which an elastic cover is hardly damaged and which is easily attached to a plate cover.

Furthermore, the present invention covers the gap forming and attaching means with an elastic cover, and protects the gap forming and attaching means by substantially following the tensioned state between the front and rear and intermediate mounting positions, and furthermore, protects the inner surface of the elastic cover. It is an object of the present invention to provide a cover device for a rotary cultivator capable of forming a smooth surface without protrusions.

(Means for Solving the Problems) In a first specific configuration for solving the problems in the present invention, a plate cover 15 that covers the tilling unit 8 is attached to the rotary machine frame 5, and an inner surface side of the plate cover 15 is provided. An elastic cover 14 is arranged and its front and rear and an intermediate portion are attached, and the elastic cover 14 is restricted in the front and rear direction and the inside and outside directions via a gap forming and attaching means at an attaching position with respect to the plate cover 15. That is, it is along the non-sagging state while interposing the interval α.

A second specific means for solving the problem in the present invention is that a plate cover 15 that covers the tilling unit 8 is attached to the rotary machine frame 5, and an elastic cover 14 is provided on the inner surface side of the plate cover 15 in front, rear, and halfway. The position is regulated in the front-rear direction and the inward / outward direction via the gap forming and attaching means, and is along the non-sagging state. Stop and elastic cover
An engaging portion formed on the outer surface of the front and rear surfaces to engage with the front and rear locking portions from the front and rear outside and to engage with the midway locking portion from one of the front and rear sides. The gap α is formed between the cover 15 and the locking portion and the engaging portion.

A third concrete means for solving the problem in the present invention is the above-mentioned elastic cover 14 in addition to the first or second concrete means.
Means that the gap forming and mounting means is covered from the tilling portion 8 side, and is substantially stretched between the mounting positions of the front and rear and the middle part.

A fourth specific means for solving the problem in the present invention is that, in addition to the second specific means, the elastic cover 14 and the engaging portion are integrally formed of rubber or synthetic resin. .

A fifth specific means for solving the problem in the present invention is that, in addition to the second specific means, the gap forming / attaching means is provided on the inner surface of the plate cover 15 with the engaging portion engaged with the engaging portion. That is, a retaining portion 31 for retaining is provided.

A sixth specific means for solving the problem in the present invention is that, in addition to the second specific means, a plurality of locking portions of the plate cover 15 are formed at intervals in the plowing width direction. The engaging portion is formed to have a length substantially corresponding to the entire plowing width in the plowing width direction or a length substantially corresponding to the locking portion.

(Operation) The elastic cover 14 is provided on the outer surfaces of the main plate cover corresponding portion 26 and the rear plate cover corresponding portion 27, respectively, with front and rear engaging portions 26Af, 27Af, 26Ag, 27Ag.
And the halfway engagement portions 26Ah, 27Ah in an outwardly projecting shape.
Except for the front engagement portion 26Af, all are engaged in the same direction,
Locking portions 26B, 27B on the inner surfaces of the main plate cover 11 and the rear plate cover 12.
The front engagement portions 26Af are engaged with the front engagement portions 26Bf formed by the front edge of the main plate cover 11 so as to fit from the front. I do.

A gap α is formed between the plate cover 15 and the elastic cover 14 corresponding to the amount of protrusion of the engaging portion, and the elastic cover 14 is attached in a stretched state. When the soil is crushed and the mud adheres, it is removed.

Since the elastic cover 14 only engages with the plate cover 15, the attachment / detachment work is easily performed, and the front engagement portion 26Af is in the opposite direction to the other engagement portions. It is prevented from easily detaching and is provided with tension.

The front and rear engaging portions 26Af, 26Ag and the halfway engaging portion 26Ah of the main plate cover corresponding portion 26 and the front engaging portion 27Af of the rear plate cover corresponding portion 27 have a length substantially covering the entire plowing width, and the elastic cover 14 Cover 15
And a plurality of middle and rear engaging portions 27Ag, 27Ah are arranged at intervals in the plowing width direction, and the elastic cover 1 is also provided between the engaging portions 27A in the plowing width direction.
4 enables elastic deformation and improves the crushed soil and cultivated soil performance.In this part, a gap α is formed between the engaging portions 27A in the cultivation width direction. Even drained easily.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 3, reference numeral 1 denotes a tractor-mounted rotary cultivator, which has right and left support arms 3 protruding from a central gear case 2, and a transmission case 4 and a side frame fixed to the outer end of each support arm 3. A frame 5 is formed,
A claw shaft 6 is rotatably supported on the lower part of the transmission case 4 and the side frame around a horizontal axis, and a large number of tilling claws 7 are attached to the claw shaft 6 to form a tilling portion 8.

A cover device 10 for covering the tilling unit 8 is provided on the rotary machine frame 5.
The cover device 10 includes a main plate cover 11 that covers the upper part of the tilling unit 8, a rear plate cover 12 that covers the rear, a front cover 13 that covers the front, and front and rear side plate covers that cover the left and right front and rear. And an elastic cover 14 arranged on the inner surface side (the tilling portion 8 side) of the main and rear plate covers 11 and 12.

1 to 4, reference numeral 15 denotes a main plate cover 11 and a rear plate cover.
12 and is formed of an iron plate or a reinforced plastic plate, and the main plate cover 11 includes upper and lower walls 11a, 11
b, left and right side walls 11c, front and rear beams 11d, 11e, etc., and the left and right side walls 11c are fixed to the transmission case 4 and the side frames. The main plate cover 11 is gradually thinned from the front and rear parts to the middle part, and is formed so that the diameter of the tilling part 8 can be further increased.

The rear plate cover 12 has a reinforcing wall 12b fixed to the front upper portion of the main wall 12a, and a plurality of reinforcing ribs 12c on the outer surface in the width direction (lateral direction).
The rear portion of the main plate cover 11 and the front upper portion of the rear plate cover 12 are connected via a pivot 16 so that the rear lower portion of the rear plate cover 12 can be moved up and down.

A triangle notch 18 for arranging the cultivator is formed in the center of the rear lower part of the rear plate cover 12, and when the cultivator is not used, a detachable triangle plate 19 is attached and closed. Also,
Rear gauge wheel escape cutouts 20 are formed on the left and right of the rear lower portion, and are closed by the auxiliary plate 21 when the rear gauge wheel is not used.

A support arm 23 projects rearward from the left and right support arms 3 via a bracket 22. An equalizing pressure adjusting means 24 is provided between the rear end of the support arm 23 and the reinforcing rib 12c of the reinforcing rib of the rear plate cover 12. Is provided.

The elastic cover 14 is mainly made of rubber or elastic synthetic resin, and has a sheet shape. As shown in FIG. 4, a synthetic resin such as polyamide resin or natural fiber is formed in the middle of the sheet portion in the thickness direction. The hooded cloth is sandwiched and made into a three-layer structure with elastic layers 14a and 14a and a reinforcing layer 14b, which can be easily elastically deformed, but not easily expanded or contracted and has durability. . It is desirable that the hood cloth of the reinforcing layer 14b is a plain weave and the longitudinal tensile strength is set larger than that of the left and right.

A large number of engaging portions A are formed on the outer surface of the elastic cover 14. The engaging portion A is made of a material having the same quality and high hardness as the elastic layer 14a. For example, when the elastic layer 14a is made of a synthetic rubber having a JIS hardness of about 35 mm, the engaging portion A is made of a synthetic rubber of about 70 mm. It is formed by joining together a hook-shaped block with a vulcanizing adhesive or the like, and can be molded in a short time using a molding die.

The elastic cover 14 has a main plate cover corresponding portion 26 facing the inner surface of the main plate cover 11 and a rear plate cover corresponding portion 27 facing the inner surface of the rear plate cover 12, and the rear plate cover 12 swings upward and rearward. In order to move, it is bumped at a portion facing the pivot 16.

The engaging portion 26A provided on the outer surface of the main plate cover corresponding portion 26 so as to protrude outward has front and rear engaging portions 26Af, 26Ag and at least one or more intermediate engaging portions 26Ah, each of which is substantially fully cultivated. The engaging groove af of the front engaging portion 26Af is formed in a length over the width, and the engaging grooves ag of the other engaging portions 26Ag, 26Ah are opened in the front and rear opposite directions.
Are facing each other. Further, on the left and right sides of the main plate cover corresponding portion 26, a ridge portion 28 having substantially the same height as the engaging portion 26A is formed.

The engaging portions 26Af, 26Ag, 26Ah are provided on the inner surface of the main plate cover 11.
The locking portions 26Bf, 26Bg, 26Bh are formed corresponding to. The front engagement portion 26Bf is formed by overlapping the front edges of the upper and lower walls 11a and 11b, and the front engagement portion 26Af is engaged from the front. The rear locking portion 26Bg and the intermediate locking portion 26Bh are formed by welding or bonding an S-shaped plate to the main plate cover 11, and a plurality of short locking portions are provided at intervals in the plowing width direction. The corresponding engaging portions 26Ag and 26Ah are engaged from behind.

A front cover 13 made of an elastic material is attached to a front portion of the upper wall 11a of the main plate cover 11 via a holding plate 29 and bolts 30, and the front engagement portion 26Af is provided together with the front cover 13 in front of the main plate cover 11. It is sandwiched between the edge and the holding plate 29. This prevents the main plate cover corresponding portion 26 from moving in the left-right direction with respect to the main plate cover 11. The ridges 28 can prevent the rear part of the main plate cover corresponding part 26 from moving largely left and right.

The chevron member located on the rear side of the halfway engaging portion 26Ah forms a retaining portion 31 fixed to the main plate cover 11, and prevents the engaging portion 26A from detaching from the locking portion 26B.

Engaging portions 27Af, 27Ag, 28Ah are also provided on the outer surface of the rear plate cover corresponding portion 27 on the front and rear portions (more precisely, the front upper portion and the rear lower portion) and the middle portion so as to protrude outward, and the front locking portion 27Af Is formed to have a length substantially corresponding to the entire plowing width, and a plurality of rear engaging portions 27Ag and intermediate engaging portions 27Ah, which are short in the plowing width direction, are provided at intervals in the plowing width direction.

On the inner surface of the rear plate cover 12, locking portions 27Bf, 27Bg, 27Bh and retaining portions 31 are formed corresponding to the engaging portions 27Af, 27Ag, 27Ah.

Further, at the left and right ends of the outer surface of the rear plate cover corresponding portion 27, side engaging portions 27Al continuous to the front and rear and the middle are formed, and the notching engaging portions 27Am are also formed at the sides of the triangular notch 18. Correspondingly, locking portions 27Bl, 27Bm are formed on the rear plate cover 12.

The rear plate cover corresponding portion 27 is a locking portion except for the side engaging portion 27Al.
27B is engaged from the rear, and the side engaging portion 27Al is a locking portion 27B.
L is engaged from the left and right outer sides.

The elastic cover 14 has an engaging portion A projecting between the elastic cover 14 and the plate cover 15.
Is formed, the gap α is formed substantially by the amount of protrusion of the engaging portion A, and it is not necessary to sag the elastic cover 14 to form the gap α.
The side facing the tillage part 8 of 14 becomes polygonal, but can be in a tensioned state.

The engaging portion A of the elastic cover 14 and the locking portion B of the plate cover 15 are positioned at the mounting position of the elastic cover 14 with respect to the plate cover 15 in the front-rear direction and inward / outward direction, and are not interposed at intervals α. A gap forming / attaching means is formed along the hanging state, and the front-rear engaging portion A is engaged with the locking portion B from the front and rear outside, so that the position is also restricted in the front-rear direction.
The gap forming and attaching means also includes a retaining portion 31 for preventing the engaging portion A from coming off from the locking portion B.

In addition, the elastic cover 14 covers the gap forming and mounting means from the tilling part 8 side, and is in a substantially stretched state (in a non-hanging state,
It is not loose. ), A smooth surface without protrusions is formed on the inner surface.

In the elastic cover 14, the main plate cover corresponding portion 26 and the rear plate cover corresponding portion 27 are formed integrally, that is, formed integrally from the front end to the rear end of the plate cover 15, but may be formed separately.

Front engaging portion 27Af of rear plate cover corresponding portion 27, other engaging portions
The engagement direction is the same as 27Ag, 27Ah, but may be in the opposite direction as the front engagement portion 26Af, especially when the corresponding portions 26, 27 are formed separately, the front engagement portion 27Af It is preferable to set the same engagement direction as the front engagement portion 26Af and fix it to the rear plate cover 12 with a stopper.

The rotary cultivator 1 is of a down cut type, and most of the engaging portions A of the elastic cover 14 are engaged with the locking portions B.
However, in the case of the upper cut type, most of the engaging portions A may be configured to engage from the front. In this case, the rear engaging portions 26Ag and 27Ag engage from the rear opposite to the other engaging portions.

FIG. 5 illustrates an elastic cover 33 for the triangular plate 19,
The elastic cover 33 has a substantially triangular frame-shaped engaging portion 33B, and the triangular plate 1
9 is fitted around the periphery. An elastic cover is also attached to the side surface of the tilling unit 8 on the auxiliary plate 21 and the left and right side plate covers.

Note that the present invention is not limited to the above embodiment,
Various modifications can be made. For example, the main plate cover 11 and the rear plate cover 12 may be formed of a single plate, the elastic cover 14 may be formed of one or two layers of sheet-like portions, or a high hardness rubber similar to the engaging portion A may be used. Or the locking portion B is lengthened in the plowing width direction to reinforce the plate cover 15,
The main plate cover 11 is provided with a retaining portion for the rear engagement portion 26Ag,
Each of the plate covers 11 and 12 may be partially notched and bent toward the inner surface to form the locking portion B and the retaining portion 31.

(Effects of the Invention) According to the present invention described in detail above, the elastic cover 14 is restricted in position in the front-rear direction and inward / outward direction by the gap forming and attaching means at the attaching position with respect to the plate cover 15, and the gap α is interposed. Since the elastic cover 14 is stretched along the non-sagging state, the elastic cover 14 can limit the deformation and movement even if a stone collides between the front and rear and the middle of the mounting position, can avoid contact with the plate cover 15, and can prevent flying stones. And the plate cover 15 can reliably prevent damage caused by being squeezed.

The gap forming and attaching means is formed on the outer surface of the elastic cover 14 with engaging portions formed at the front and rear and the middle of the inner surface of the plate cover 15, and is engaged with the front and rear engaging portions from the front and rear outer sides. And an engaging portion that engages from one of the front and rear with respect to the halfway locking portion, and since the elastic cover 14 has a gap α formed by the locking portion and the engaging portion between the elastic cover 14 and the plate cover 15, Elastic cover
14 can limit the deformation and movement even if a stone collides between the front and rear and the middle of the mounting position, avoid contact with the plate cover 15, and ensure the breakage caused by squeezing between the scattered stone and the plate cover 15. And the mounting of the elastic cover 14 to the plate cover 15 is simple, no special member is required to form the gap α, and the engaging portion and the locking portion can be protected from collision with stones or the like. .

The elastic cover 14 covers the gap forming and mounting means from the cultivating portion 8 side, and is substantially stretched between the front and rear and intermediate mounting positions, so that there is no protrusion on the inner surface of the elastic cover 14 so that a smooth surface is provided. Can be formed.

Since the elastic cover 14 and the engagement portion are integrally formed of rubber or synthetic resin, the formation of the engagement portion can be simplified, and the attachment to the plate cover 15 is facilitated.

The gap forming and attaching means is provided with a retaining portion 31 for retaining the engaging portion engaged with the locking portion on the inner surface of the plate cover 15, so that even if a bolt or the like is not used, the gap to the plate cover 15 can be increased. The elastic cover 14 can be securely mounted.

A plurality of locking portions of the plate cover 15 are formed at intervals in the plowing width direction, and the engaging portions of the elastic cover 14 have a length substantially corresponding to the locking portion or a length substantially covering the entire plowing width in the plowing width direction. By appropriately selecting the length of the engaging portion, the elastic cover 14 can be reinforced or the drainage between the covers 14 and 15 can be improved.

[Brief description of the drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a sectional side view of a main part, FIG. 2 is a plan view of an elastic cover and a locking portion, and FIG. 3 is a side view of a rotary tiller. Fig. 4 is Fig. 1
FIG. 5 is an enlarged sectional view of an IV part, and FIG. 5 is a partially cutaway perspective view of an elastic cover for a triangular plate. DESCRIPTION OF SYMBOLS 1 ... rotary tiller, 5 ... rotary machine frame, 8 ... tillage part, 10 ... cover device, 11 ... main plate cover, 12 ... rear plate cover, 14 ... elastic cover, 15 ... plate cover , 16 ……
Pivot part, 26: Main plate cover corresponding part, 27: Rear plate cover corresponding part, 31: Detachable part, A: Engaging part, B: Locking part,
α ... gap.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takaaki Ohno 64 Ishizukita-cho, Sakai-shi, Osaka Kubota Iron Works Sakai Works Co., Ltd. (56) References 136007 (JP, U)

Claims (6)

(57) [Claims] 1. A plate cover (15) for covering a tilling portion (8) is attached to a rotary machine frame (5), and an elastic cover (14) is disposed on the inner surface side of the plate cover (15). The elastic cover (14) is positioned at the mounting position with respect to the plate cover (15) in the front-rear direction and the inward / outward direction via the gap forming / mounting means.
A cover device for a rotary cultivator, wherein the cover device is adapted to be in a non-sagging state while intervening. 2. A plate cover (15) for covering a tilling portion (8) is attached to a rotary machine frame (5), and an elastic cover (14) is provided on the inner surface side of the plate cover (15) in front, rear, and halfway. The position is regulated in the front-rear direction and inward / outward direction via the gap forming and attaching means, and is along the non-sagging state. A locking portion, and an engaging portion formed on an outer surface of the elastic cover (14) and engaged with the front and rear locking portion from front and rear and outside and with the halfway locking portion from front and rear. And a gap (α) is formed between the elastic cover (14) and the plate cover (15) by a locking portion and an engaging portion. 3. The elastic cover (14) covers the gap forming and mounting means from the tilling part (8) side, and is substantially stretched between front and rear and midway mounting positions. Item 3. A cover device for a rotary tiller according to item 1 or 2. 4. The cover device for a rotary tiller according to claim 2, wherein the elastic cover (14) and the engaging portion are integrally formed of rubber or synthetic resin. 5. The apparatus according to claim 5, wherein said gap forming and mounting means is a plate cover.
The cover device for a rotary tiller according to claim 2, wherein a retaining portion (31) for retaining an engaging portion engaged with the engaging portion is provided on an inner surface of the rotary tilling device. 6. The locking portion of the plate cover (15) is formed in a plurality at intervals in the plowing width direction, and the engaging portion of the elastic cover (14) has a length extending over substantially the entire plowing width in the plowing width direction. The cover device for a rotary tiller according to claim 2, wherein the cover device is formed to have a length substantially corresponding to the locking portion.