JPH0848264A - Bonnet operating device for working vehicle - Google Patents

Abstract

PURPOSE:To mount an elastic member on a seat without using bolts and nuts by forming the elastic member with a compression coil spring so that the periphery of a mounting hole in the seat can be held between adjacent coils and mounted on the seat in the state that one end of the compression coil spring is inserted in the mounting hole. CONSTITUTION:An elastic member 44 formed with a compression coil spring is mounted on an upper seat 43A formed on a partition wall plate 27B for a bonnet. That is, adjacent coils formed at one end of the compression coil spring (spring) 44 are formed at mutually contacting pitches. Adjacent coils at the remaining part of the spring 44 are formed at mutually spacing pitches. A mounting hole 45, vertically passing through, is formed in the upper seat 43A so that the coil at closely pitched one end of the spring 44 can be used as a male screw and the periphery of the mounting hole 45 as a female screw to screw closely pitched one end into the mounting hole 45. In this way, the periphery of the mounting hole 45 can be held by the coil at closely pitched one end during mounting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bonnet operating device for a work vehicle such as a tractor, and more specifically, a lock means for fixing a swinging openable / closable bonnet in a closed position is provided so that the bonnet can be closed. It is sandwiched between the seat on the bonnet side and the seat on the fixed side due to the rocking of the hood, and is compressed and deformed against its elasticity, and the bonnet is released from the closed posture by its elastic restoring force with the release operation of the locking means. The present invention relates to one in which an elastic member that swings to the side is attached to one of the seats.

[0002]

2. Description of the Related Art When using the above operating device, the bonnet swings toward the open side by the elastic restoring force of the elastic member when the locking means is released, so that the fingers can be inserted between the bonnet and the fixed portion. The opening of the bonnet can be easily performed by forming a gap between the bonnet and the bonnet when the locking means is automatically fixed when the bonnet swings to the closed posture. When the elastic member is compressed and deformed against the elasticity with the swing to the closed posture, the failure of the lock means can be reduced by buffering the contact of the bonnet with the lock means due to the swing to the closed posture. It has the following advantages. Conventionally, as an operating device having such an advantage, the elastic member is made of rubber or a compression coil spring, and the elastic member made of the rubber or the compression coil spring is attached to the seat with a bolt nut.

[0003]

However, in the case of the above-mentioned conventional technique, since the bolt nut is used for attaching the elastic member to the seat, the cost is increased because the bolt nut is used.

An object of the present invention is to reduce the cost.

[0005]

The bonnet operating device for a work vehicle according to the present invention is characterized in that the elastic member is composed of a compression coil spring, and one end of the compression coil spring is inserted into a mounting hole formed in a seat. Therefore, the compression coil spring is attached to the seat by sandwiching the peripheral portion of the attachment hole between adjacent coil portions in the axial direction of the compression coil spring.

[0006]

In the compression coil spring, by sandwiching an object between the adjacent coil portions while deforming the adjacent coil portions in the axial direction against the elasticity so as to move away in the axial direction,
The item can be attached, in other words, attached to the item.

Focusing on this point, the elastic member is a compression coil spring, and the peripheral portion of the mounting hole is sandwiched by the coil portion adjacent to one end of the elastic member made of the compression coil spring which is inserted into the mounting hole formed in the seat. Since the elastic member is attached to the seat by attaching it, the elastic member itself also serves as a mounting tool for mounting it on the seat, and when mounting the elastic member to the seat, mounting tools such as bolts and nuts are not required. is there.

Particularly, as shown in Examples described later, when the pitch of one end portion of the elastic member inserted into the mounting hole is made smaller than that of the other portion, for example, when the adjacent coil portions are in contact with each other, Even if the seat is thin, the seats can be strongly sandwiched by the adjacent coil parts, so the elastic member should be securely attached to the seat without being unduly thick in order to attach the elastic member. You can

[0009]

As described above, according to the present invention, it is possible to provide a bonnet operating device for a work vehicle, which does not require a mounting tool such as a bolt and nut for mounting the elastic member on the seat, and can reduce the cost accordingly.

[0010]

[Example] An example of application to an agricultural tractor will be shown.

As shown in FIG. 1, an agricultural tractor comprises a pair of left and right front wheels 1 for steering and driving, and a front frame 2 in a front-rear and lateral orientation fixed to a crankcase 4 of an engine 3 so that a pair of left and right driving wheels is provided. The rear transmission case 6 equipped with the rear wheels 5 is attached to the rear clutch housing 7 of the engine 3.
In addition, an airframe frame structure that is fixedly connected by a connecting frame member 8 is provided. The front frame 2 is, as shown in FIG.
It is composed of a pair of left and right front frame members 2A that are juxtaposed in the left-right direction side by side and a front end frame member 2B that firmly connects the front ends of the front frame members 2A. A rear frame 9 having a gate-shaped front view is fixedly connected to the clutch housing 7. A hydraulic continuously variable transmission 10 is attached to the rear mission case 6. Reference numeral 11 is a steering wheel, and 12 is a driver's seat.

As shown in FIGS. 2 and 3, an engine cooling radiator 14, a battery 15 and a headlight 16 are incorporated in an engine room 13 in which the engine 3 is installed.

The radiator 14 is arranged in the front part of the engine 3, the battery 15 is arranged in the lower part of the front part of the radiator 14, and the headlight 16 is arranged in the front part of the radiator 14. The upper part of the above, that is, the upper part of the battery 15 is arranged.

As shown in FIG. 2, the radiator 14 is loaded and supported by a pair of left and right overhang brackets 17 fixed to the front frame 2 via cushion materials 18.

The support structure for the battery 15 is shown in FIG.
As shown in FIG. 9, a mounting base 19 on which the battery 15 is mounted in a horizontal posture is connected to and supported by the front frame 2, and acts on the front end portion of the upper surface of the battery 15 mounted on the mounting base 19 so that the battery 15 can be mounted. A fixing means for pressing and fixing the mounting table 19 is provided.

As shown in FIG. 2, FIG. 3, and FIG. 9, the fixing means has a fixing frame 20 arranged above the battery 15 from the rear, and the left and right central portions of the upper end of the upper surface of the battery 15 are fixed. A pressing tool 21 for pressing down is provided, and an operating means for operating and fixing the pressing tool 21 in a pressing action posture is provided.

The fixed frame 20 is a pair of left and right support members 2 made of a plate material which are fixedly connected to the mounting table 19 in a vertical posture.
0A and a horizontal frame body 20B installed over the upper ends thereof. That is, one frame structure fixedly supported by the mounting table 19 and fixed to the front frame 2 from the fixed frame 20 and the mounting table 19 is configured.

As shown in FIG. 9, the horizontal frame body 20B includes a main body portion 20a in a laterally-oriented posture and the main body portion 2a.
0a has a substantially U-shaped plan view including side portions 20c in a front-rear and lateral orientation that are fixedly connected to the left and right ends of the main body 20a, the inclined portion 20b, and the side portion 20c. Each of them has an L-shaped cross section having a vertically-oriented plate portion and a horizontally-oriented plate portion continuous with the upper end thereof.
It is in the shape of a letter. That is, it is made of an angle material.

The pressing member 21 can be switched between the pressing action position and the pressing release position which allows the battery 15 to be detached from the mounting base 19 to the front upper direction by swinging up and down around the laterally-oriented horizontal axis a. It is attached to the fixed frame 20 in a state in which front and rear and left and right positions are regulated, and is a bent product of one rod-shaped body.

The operating means is composed of a pull bolt 22 inserted into and engaged with the mounting base 19, and a wing nut 23 which is screwed into the pull bolt 22 and screwed to push the pressing tool 21 downward. . That is, the wing nut 23 is detached from the pulling bolt 22 to allow the holding tool 21 to swing to the holding release posture.

As shown in FIGS. 2, 3 and 9, the air cleaner 24 for the engine 3 is installed near the engine 3 in a front-rear and lateral posture with its axis oriented in the front-rear horizontal direction. The attachment means of this air cleaner 24 is shown in FIG.
As also shown in FIG. 3, a leaf spring support 26 for elastically sandwiching and holding the multipurpose bracket 25 fixed to the engine 3 in the diametrical direction is a means for fixing with a rivet. 26 is configured so that the air cleaner 24 can be fitted and mounted from above.

As shown in FIG. 4, the headlight 16 includes a pair of left and right headlamps 16A having lenses,
The head cover 16A includes a light cover unit 16B arranged in a front portion of the head lamp 16A so as to extend to a side portion.
The light cover unit 16B includes a series of integrated light grills 16a made of synthetic resin, and a pair of left and right synthetic resin (acrylic resin or the like) mounted on both left and right portions of the light grill 16a located in front of each headlamp 16A. And a translucent cover 16b.

A cover structure for covering the engine room 13 will be described. As shown in FIGS. 1 to 3 and 9,
A bonnet 27 that covers the upper surface, the front surface, and the left and right side surfaces of the upper portion of the engine room 13, and a pair of left and right side covers 28 that covers the left and right side surfaces of the lower rear portion of the lower portion of the engine room 13 behind the battery installation portion, A front cover 29 is provided to cover the front surface and the left and right side surfaces of the battery installation portion on the front side of the lower side portion. The side cover 28 is formed with an exhaust hole 28E from the inside of the engine room 13 to the outside.

The bonnet 27 is in a horizontally closed posture by swinging up and down about the left and right lateral axis X with the rear end as a fulcrum, and in a opened posture in which the front end is located diagonally forward and upward with respect to the rear end. It is switchable, and is attached to the rear frame 9 so as to be swingable up and down. The light cover unit 16B of the headlight 16 is fitted and fixed to the front portion, and the headlamp 16A is incorporated. .

As shown in FIGS. 4 and 5, the bonnet 27 is attached to the rear frame 9 so as to be vertically swingable, and at the upper side portion and the left and right side portions of the fitting portion of the light cover unit 16B. A bonnet main body 27A having a front portion formed so as to form a bottom wall, a partition plate 27B attached to the bonnet main body 27A so as to form a bottom side of the fitting portion and a bottom of the headlamp installation portion, and a bonnet. The main body 27A has a reinforcing stay 27C that connects the lower ends of the left and right side plate portions to each other near the front portion. That is, the front surface of the bonnet 27 and the front left and right side surface portions continuous with the front surface are formed from the light cover unit 16B.

Main body 27A of the bonnet of the partition plate 27B
The partition structure 27B is attached to the bonnet main body 27A.
Is fixed to the lower ends of the left and right side plate parts, is fixed to the top plate part near the front part of the bonnet main body 27A at one end, and is fixed to the substantially U-shaped plate frame body 30 fixed to the upper side part of the bonnet main body 27A at the other end. The mounting seat 31 of the headlamp 16A is stamped and formed on the partition plate 27B.

The fixing means for fixing the light cover unit 16B in the bonnet 27 in a fitted state has vertical holes UH on the upper side of the bonnet main body 27A and the light grill 16a of the light cover unit 16B.
And a plurality of upwardly projecting projections 32U for restricting the horizontal position (position in the front-rear, left-right direction) of the upper end portion of the light grill 16a with respect to the bonnet main body 27A (bonnet 27) by being inserted into the hole UH. A vertical hole DH is inserted into the plate 27B and the hole DH is inserted into the light grill 16a to regulate the horizontal position (front-rear left-right direction position) of the lower end portion of the light grill 16a with respect to the partition plate 27B (bonnet 27). It is configured by forming a plurality of downwardly-projecting protrusions 32D. Further, the load support of the light cover unit 16B, that is, the position fixing to the bonnet 27 downward, is performed by loading the light grill 16a on the partition plate 27B. The holes UH, DH
Both penetrate vertically, and the protrusions 32U, 32
D is formed integrally with the light grill 16a. That is, the light grill 16a is integrally formed with the protrusions 32U and 32D.

Explaining the procedure for assembling the front part of the bonnet 27 incorporating the headlight 16, the protrusion 32U formed on the upper end portion of the light grill 16a of the light cover unit 16B is inserted into the hole of the bonnet main body 27A, and in that state, Partition plate 27 with headlamp 16A attached
B to the hole formed in the partition plate 27B for the light grill 16
The bonnet main body 27A so that the protrusion 32D of "a" is inserted
Attach to

The operating device for the bonnet 27 will be described. The operating device is a release-operable locking means for fixing the bonnet 27 in the closed position, and a release-operating open locking device for fixing the bonnet 27 in the open position. Initial movement means for opening the bonnet 27 when the lock means is released is provided.

As shown in FIGS. 4, 5, and 9, the locking means includes a main body portion 20 of the fixed frame 20.
A fixing pin 33 is fixed to the front surface of the vertical plate portion of a, and the mounting frame body 34 connected to the plate frame body 30 is rocked around the longitudinal axis P in a state where the bonnet 27 is in the closed posture. A lock metal fitting 35, which is engageable and disengageable with respect to the fixing pin 33 and which is prevented from moving upward by being engaged, is provided with a lock spring 36 for imparting a swinging force to the engagement attitude to the lock metal fitting 35. An operating tool 37 is provided above the bonnet 27 for swinging the lock fitting 35 in a detached posture against the swinging force by swinging about the vertical axis Y.

The lock fitting 35 has a bonnet 27.
The lock pin 35 is brought into contact with the locking pin 35 to swing to the disengagement posture against the swinging force, and the contact action is released when swinging to the closed posture to lock. A cam surface 35a is formed to allow the metal fitting 35 to swing to the engagement posture by the swinging force. That is, the lock fitting 35 is configured to automatically engage with the fixing pin 33 when the bonnet 27 swings to the closed posture. The operation tool 37 is supported by the plate frame body 30 and the attachment frame body 34.

As shown in FIGS. 2 and 3, the opening locking means is provided with a rod-supporting member 38 for supporting the bonnet 27 against the weight thereof by supporting the bonnet 27 in the open position. Is provided with a switching means for automatically switching to the stretched state in accordance with the swinging of the open posture. The strut material 38
Bonnet 27 in a rearwardly tilted posture (a posture almost perpendicular to the top plate of the bonnet 27 in the open posture).
By interposing between the post 39 and the post 39 fixed to the multi-purpose bracket 25, the bracing state is achieved.

As shown in FIG. 13, the switching means has one end in the longitudinal direction of the bracing member 38 attached to the bonnet 27 so as to be vertically swingable around the left and right laterally extending axis a1, and the bracing member 38 in the lateral direction. The bracing member 38 in a state in which the position is regulated and accompanying the swing of the bonnet 27
Of the bracing member 38 while allowing the sliding movement in the longitudinal direction of the
A support portion 40 for supporting the other end side in the longitudinal direction of the load is formed on the post 39, and when the bonnet 27 is swung in the open position, the support portion 40 is dropped into the support portion 40 by the weight of the support member 38. By engaging with each other, an engaging portion 38a for preventing the sliding movement of the bracing member 38 with respect to the supporting portion 40 is formed. In other words, by fixing the bracing member 38 to the supporting unit 40 by engaging the engaging portion 38a with the supporting unit 40, the bracing member 38 is held in the bracing state, and the bracing member 38 is lifted and rocked. By releasing the engagement of the engagement portion 38a with the support portion 40, the tension by the tension member 38 is released, and the bonnet 27 is allowed to swing to the closed posture.

The means for forming the support portion 40 is such that the post 39 is pierced with the tension member 38 movably in the longitudinal direction thereof, and the left and right width is slightly larger than the left and right width of the tension member 38. 41 is formed, and the peripheral portion of the long hole 41 is used as the support portion 40. In addition,
The long hole 41 is formed in a shape in which the width is gradually reduced toward the lower side in order to prevent the supporting member 38 from rattling with respect to the post 39 by causing the supporting member 38 to bite into the hole peripheral portion, that is, the support portion 40. Has been done.

The engaging portion 38a is formed by bending the other end of the tension member 38. At the other end of the bracing member 38, a snap pin 42 is inserted and held to prevent the bracing member 38 from coming off from the elongated hole 41 toward the one end side by coming into contact with the supporting portion 40. That is,
The bonnet 27 is configured so as to prevent the bonnet 27 from being swung by a force far beyond the open posture, and to prevent the supporting member 38 from coming off from the elongated hole 41 due to the swing operation.

The initial moving means moves the bonnet 27 to the closed position, so that the seat 43A on the bonnet 27 side and the seat 43B on the fixed side (hereinafter, this seat 43B is referred to as a lower seat, the seat 43A on the bonnet 27 side). Is referred to as an upper side seat) and is compressed and deformed against the elasticity thereof to allow the bonnet 27 to swing to the closed position, and to release the locking means in response to the operation. The pair of left and right elastic members 44 for swinging the bonnet 27 from the closed posture to the open side by the elastic restoring force against the weight thereof are provided on the upper seat 4
It is configured by being attached to 3A.

The upper seat 43A is formed in the partition plate 27B at a position facing the main body 20a of the fixed frame 20 in the vertical direction, and the lower seat 43B is
It is composed of a portion of the horizontally oriented plate portion of the main body portion 20a of the fixed frame 20 corresponding to the upper seat 43A.

The elastic member 44 is composed of a compression coil spring.

As shown in FIGS. 4 to 8, the means for attaching the compression coil spring 44 to the upper seat 43A is such that one end portion of the compression coil spring 44 is formed at a pitch at which adjacent coil portions contact each other, while the compression coil spring 44 is formed. The remaining portion is formed at a pitch such that adjacent coil portions are positioned with a space therebetween, a mounting hole 45 penetrating in the up-down direction is formed in the upper seat 43A, and the coil portion at one end of the dense pitch of the compression coil spring 44 is formed with a male screw. The fine pitch one end portion of the compression coil spring 44 is inserted into the mounting hole 45 by screwing the dense pitch one end portion into the mounting hole peripheral portion with the mounting hole peripheral portion as a female screw mountain. The compression coil spring 44 is attached to the upper seat 43A by using the elasticity of the compression coil spring 44 as a mounting force by sandwiching the peripheral portion of the mounting hole from the vertical direction by the adjacent coil portions. It is a means. The mounting hole 45 is
As shown in FIG. 6, the compression coil spring 44 is formed in a keyhole shape having a notch 45a through which the coil portion is inserted so that the compression coil spring 44 can be screwed.

Further, one end of the compression coil spring 44 is brought into contact with the reinforcing stay 27C to rotate the compression coil spring 44 in a loosening direction with respect to the upper seat 43A (rotation in the direction in which one end of the fine pitch is separated from the upper seat 43A). It is extended so as to form a stopper portion 44S for blocking. That is, the compression coil spring 44 is utilized by utilizing the reinforcing stay 27C.
Is configured so as to prevent the separation of the members, the structure is simplified by sharing the members. A resin cap 45, which forms a contact surface with the lower seat 43B, is elastically fitted and fixed to the lower end of the compression coil spring 44.

Of course, when the partition plate 27B and the reinforcing stay 27C are attached to the bonnet main body 27A and then the compression coil spring 44 is attached to the partition plate 27B, the stopper portion 44S is attached to the reinforcing stay 27C.
Since it is impossible to assemble the compression coil spring 44 in a rotation preventing state in which the partition plate 27B is brought into contact with the partition wall plate 27B, the partition plate 27B is assembled with the compression coil spring 44.

As shown in FIG. 9, the side cover 28 opens and closes the side surface of the engine room 13, and the front cover 29 also opens and closes the front part of the engine room 13 when attached and detached.

As shown in FIG. 2, the means for detachably attaching the side cover 28 includes a lower loading supporting means for detachably supporting the lower end of the side cover 28 on the machine body, and a side cover 28 on the machine body. And an upper mounting means for removably mounting the upper part.

The lower load supporting means is the side cover 2
At the lower end of 8, a pair of front and rear downward position regulating projections 4
6 are connected to each other, and the position control projections 46 are inserted from the upper side to the machine body to mount and support the lower end of the side cover 28 in a state where the lower end of the side cover 28 is restricted from moving forward and backward and left and right with respect to the machine body. The seat 47 is provided.

The front one of the lower mounting seats 47 is
The rear bracket is formed on the clutch housing 7 while being formed on the overhang bracket 17.

The upper mounting means is provided with two front and rear upper mounting seats 48 on the machine body side, which come into contact with the upper inner surface of the side cover 28 and prevent the side cover 28 from falling inward.
A sideways engaging projection 49 is provided at a position of the side cover 28 corresponding to the upper mounting seat 48, and the engaging projection 49 is elastically inserted into and engaged with the upper mounting seat 48 so that the side cover 28 is secured. The catcher 50 is provided to prevent outward falling, that is, to hold the side cover 28 in a closed posture that closes the side surface of the engine room 13.

The front side of the upper mounting seat 48 is
The fixed frame 20 is formed on the side portion 20c, while the rear one is attached to the rear frame 9.

In short, the mounting means of the side cover 28 supports the lower end of the side cover 28 on the lower mounting seat 47 while loading and supporting the position regulating projection 46 in the hole of the lower mounting seat 47 from above. By elastically engaging 49 with the catcher 50, the side cover 28 is attached in the closed posture, while the engaging projection 49 is pulled out from the catcher 50, and the position regulating projection 46 is pulled out from the position regulating hole. The side cover 28 is removed by detaching the side cover 28 from the lower mounting seat 47.

At the upper end of the side cover 28, as shown in FIG.
In addition, as shown in FIGS. 3, 9, and 12, when the engagement protrusion 49 is located inside the side cover portion of the bonnet 27 that is in the closed position in the closed position and is disengaged from the catcher 50 due to body vibration or the like. By contacting the side cover portion of the bonnet 27, the side cover 28
The plate-like fall-out prevention member 51 is connected to prevent the fall-out of the left and right, that is, the fall-out. Therefore, the bonnet 2
Since the side cover 28 cannot be mounted when the position 7 is swinging in the closed position, the side cover 28
Will be installed in the closed posture before closing the bonnet 27.

The front cover 29 is composed of a lower cover body 29A and an upper cover body 29B which overlaps with the lower cover body 29A, and these are all integrally molded products of synthetic resin.
The front cover 29 is integrated by being manufactured as an integrally molded product and then being joined. And,
As shown in FIG. 4, the upper end of the front cover 29 (the upper end of the upper cover body 29B) is brought into close contact with the lower surface of the partition plate 27B of the bonnet 27 in an elastically deformed state so that the lower end of the bonnet 27 and the front surface of the bonnet 27 are brought into contact with each other. A seal member 52 is fitted and fixed so as to block a gap from the upper end of the cover 29 and prevent air and water from entering the engine room 13 from the outside through the gap.
The sealing material 52 also functions as a cushioning material that absorbs an impact when the bonnet 27 is closed.

The means for detachably attaching the front cover 29 is the front cover 2 on the machine body.
Lower support means for detachably supporting the lower end of 9 and upper attachment means for detachably attaching the upper portion of the front cover 29 to the machine body are provided.

The lower support means is a front cover 29.
Of the lower cover body 29A, a pair of left and right mounting shafts 53 in a horizontal horizontal orientation are integrally formed on the lower end of the lower cover body 29A so as to project downward, and the mounting shafts 53 are fitted into the machine body side from above, and the front cover 29 A U-shaped receiver 54 is fixedly mounted so as to allow the mounting shaft 53 to oscillate around the axis and to support the load in the front-rear position regulation state. The receiving member 54 is integrally connected to the front end of the mounting table 19.

The upper attachment means contacts the upper portion of the inner surface (rear surface) of the front cover 29 in a standing posture supported by the lower support means to prevent the front cover 29 from falling inward (rearward). Left and right upper mounting seats 55
Is provided on the fuselage side, and an engaging projection 56 in a lateral posture is provided at a position corresponding to the upper mounting seat 55 of the front cover 29, and the engaging projection 56 is elastically inserted and engaged with the upper mounting seat 55. Thus, a catcher 57 that prevents the front cover 29 from falling outward (forward), that is, holds the front cover 29 in a closed posture that closes the front portion of the engine room 13, is provided.

The upper mounting seat 55 is the fixed frame 20.
Is formed in the main body portion 20a.

In short, the mounting means of the front cover 29 is such that the mounting shaft 53 is fitted into the receiving member 54 from above to support the loading, and the engaging projection 56 is attached to the catcher 57.
The front cover 29 is attached in a closed posture by elastically engaging with the front cover 29. On the other hand, the engaging projection 56 is pulled out from the catcher 57, and the mounting shaft 53 is detached upward from the receiving tool 54. It is configured to remove the cover 29.

The engaging projection 49 and the catcher 50 which constitute the upper mounting means for the side cover 28 and the engaging projection 56 and the catcher 57 which constitute the upper mounting means for the front cover 29 have the same construction. The catcher 50, 57 constituting the upper mounting means for the cover 28 is taken as an example.
Will be described in detail below.

As shown in FIGS. 10 and 11, the catcher 50 has a hole 58 into which the engaging projection 49 is inserted in the upper mounting seat 48, and the hole 58 is formed on the rear side of the upper mounting seat 48.
The U-shaped spring member 59 for preventing the slip-out and restricting the position in the sandwiching direction with respect to the upper mounting seat 48 by elastically sandwiching the engaged projection 49 that has entered between the two leg portions 59b is provided on the rear surface of the upper mounting seat 48. It is mounted on the side.

The means for attaching the spring material 59 to the upper mounting seat 48 is such that both ends of the spring material 59 are formed into U-shaped engaging portions 59a, and the engaging portions 59a of the spring material 59 are relatively approached and separated. A pair of first locking portions 60 that are inserted and supported only for displacement, and both leg portions 59 of the spring material 59.
By making contact with the vicinity of the bent portion 59c of b, the direction (the upper mounting seat 48) orthogonal to the opening / closing displacement surface of the both leg portions 59b.
The upper mounting seat 48 is provided with a pair of second locking portions 61 that prevent the second locking portions 61 from being separated from the rear surface of the upper mounting seat 48.

The first locking portion 60 forms the upper mounting seat 48 in an L-shaped cross section (the front mounting seat 48 of the side cover 28 and the upper mounting seat 55 of the front cover 29 are fixed frame 20). It is originally because of the configuration of the horizontal frame body 20B of
Only the rear upper mounting seat 48 with respect to the side cover 28 is formed. ), The engaging portion 59a of the spring material 59 is formed with a slit 62 which can be inserted in a state in which the engaging portion 59a is approached against the elasticity. That is, the slit 6 of the peripheral portion of the slit of the upper mounting seat 48
It is composed of peripheral parts at both ends.

The second engaging portion 61 has a punched-out piece 58 when the hole 58 is punched into the upper mounting seat 48.
It is configured by forming the connecting portion of A to the upper mounting seat 48 to have a narrow width, that is, forming the punching piece 58A into a stem shape.

The engaging portion 59a of the spring material 59 is the second
The spring material 59 is inserted along the back surface of the upper mounting seat 48 so as to pass between the locking portion 61 and the back surface of the upper mounting seat 48, and the spring material 59 is arranged so that both legs 59b of the spring material 59 approach each other. After the locking portion 59a is inserted into the slit 62 while being compressed and deformed, the compression is released, so that the locking portion 59a is locked to the first locking portion 60. Attach to 48.

Between the radiator 14 and the engine 3, a suction type radiator fan 63 for sucking air from the front through the radiator 14 is arranged.

[Other Embodiments] In the above embodiment, the compression coil springs 44 have different pitches at one end and the other end, but the compression coil springs 44 may have the same pitch over the entire length. .

In the above embodiment, the compression coil spring 44 is attached to the seat 43A on the bonnet 27 side.
The compression coil spring 44 may be mounted on the fixed side seat 43B.

In the above embodiment, the reinforcing stay 27C is used as a so-called detent stopper so as to prevent the compression coil spring 44 from being separated from the seat. good.

In the above-described embodiment, the bonnet 27 which swings and opens around the rear left and right lateral axis is carried out. However, the present invention, the bonnet 27 which swings and opens around the left and right lateral axis and the front, The bonnet 27 that swings and opens about the front-rear and lateral-direction axis of the left and right parts can also be implemented.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

[Figure 1] Side view of work vehicle

[Figure 2] Side view of the engine room

FIG. 3 is a side view of the upper part of the engine room showing an opened hood.

FIG. 4 is an enlarged vertical sectional side view of a main part.

FIG. 5 is an enlarged vertical front view of the main part.

FIG. 6 is a plan view of a partition plate.

FIG. 7 is an enlarged plan view of the main part (seat) of the partition plate.

FIG. 8 is a cutaway side view of a main part showing a state before the compression coil spring is screwed into the seat and mounted.

FIG. 9 is an exploded perspective view of a structure that covers an engine room.

FIG. 10 is a front view showing a catcher.

FIG. 11 is a cutaway plan view showing the operation of the catcher.

FIG. 12 is a vertical cross-sectional front view of essential parts showing the relationship between the hood and the side cover.

FIG. 13 is an enlarged cutaway front view of a main part.

[Explanation of symbols]

 27 Bonnet 43A Bonnet side seat 43B Fixed side seat 44 Elastic member (compression coil spring) 45 Mounting hole

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Shunzo Yamada 64 Ishizukita-cho, Sakai City, Osaka Prefecture Kubota Sakai Factory

Claims (1)

[Claims] 1. A lock means for fixing a swinging openable / closable bonnet (27) in a closed position is provided so that it can be released, and a seat on the bonnet (27) side is attached when the bonnet (27) swings to the closed position. (43A) and fixed side seat (43B)
The elastic member (44) is sandwiched between and compressed and deformed against its elasticity, and the elastic member (44) swings the bonnet (27) from the closed position to the open side by the elastic restoring force of the locking means when the locking means is released. A bonnet operating device for a work vehicle attached to one of the seats (43A, 43B), wherein the elastic member (44) is composed of a compression coil spring, and one end of the compression coil spring (44) is seated (43A) or The compression coil spring (44) is seated by sandwiching the periphery of the mounting hole with adjacent coil portions in the axial direction of the compression coil spring (44) while being inserted into the mounting hole (45) formed in the seat (43B). 43A) or a hood operating device for a work vehicle attached to a seat (43B).