JP2011063135A - Opening/locking device of hood - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembling method for assembling a hood with a stand rod coupled thereto while arranging a coming-off prevention part in the stand rod in an opening/locking device of a hood in which a stand rod coupled to a hood is let stand by a guide hole and stretched to support the hood in an opened condition when opening a hood. <P>SOLUTION: A coming-off prevention part 52 for abutting and acting on a support body 41 is provided to a free end side of a stand rod 42 so as to prevent the stand rod 42 from slipping out of a guide hole 45 when the hood 14 is rockably opened. A notch 55 forming a passage 56 in which the stand rod 42 is assembled in the guide hole 45, is provided to the support body 41 in a state of being opened toward the lateral outside of the support body 41 and communicated to the guide hole 45. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention includes a stand rod that is swingably connected to a bonnet that is swingable up and down, and a support having a guide hole through which the stand rod is slidably inserted in the longitudinal direction of the stand rod. As the bonnet opens and swings, the guide hole raises the stand rod, and the locking portion located on the free end side of the stand rod engages with the lower end of the guide hole. The stand rod is supported in an upright position to support the bonnet in an open position, and the guide hole causes the stand rod to fall down as the bonnet is closed and swung. It is related with the open lock apparatus of the bonnet comprised as mentioned above.

  In the above-described bonnet opening lock device, when the bonnet is operated to open, the guide rod is in a standing posture by the standing operation of the guide hole with respect to the stand rod and the receiving action of the lower end portion of the guide hole with respect to the stand rod. The hood is supported in a standing posture and the bonnet is opened and supported.

  Conventionally, as this kind of bonnet opening lock device, there has been one disclosed in Patent Document 1, for example. The thing shown by patent document 1 is provided with the strut material as a stand rod, and the post as a support body. The post has a long hole as a guide hole. The tension member is provided with a snap pin as a retaining portion, and the snap pin prevents the tension member from coming out of the long hole when the bonnet is opened.

JP-A-8-48264 (paragraphs [0032] to [0035], FIGS. 2, 3 and 13)

  In the bonnet provided with the above-described unlocking device, the stand rod is connected to the bonnet before being assembled to the vehicle body side, the bonnet is assembled to the vehicle body side with the stand rod being connected, and the stand rod is attached to the bonnet. In some cases, an assembling method of inserting into the guide hole of the support on the vehicle body side while being connected to the vehicle is employed. While adopting the above bonnet assembling method while adopting the bonnet opening lock device obtained based on the above-mentioned conventional technology, it tends to be disadvantageous in terms of providing a retaining portion on the stand rod. It was.

In the case of the bonnet opening lock device obtained based on the above-described conventional technology, if the stand rod is connected to the bonnet and the stand rod is provided with the retaining portion, the retaining portion becomes an obstacle. The stand rod could not be inserted into the guide hole.
Therefore, in order to employ the above-described method of assembling the bonnet, it is necessary to configure the retaining portion of the stand rod as a post-attachment type that is attached to the stand rod after being inserted into the guide hole. It must be manufactured separately, or it must be troublesome to install the retaining part after assembling the stand rod into the guide hole, and the manufacturing cost and assembly work for installing the retaining part on the stand rod Expenses tend to be large from the aspect.

  It is an object of the present invention to provide a bonnet opening lock device that can employ the above-described bonnet assembling method while providing an economical advantage while providing a stand rod with a retaining portion.

The first invention comprises a stand rod that is swingably connected to a bonnet that is swingable up and down, and a support having a guide hole through which the stand rod is slidably inserted in the longitudinal direction of the stand rod. As the bonnet is opened and swung, the guide hole raises the stand rod, and the locking portion located on the free end side of the stand rod is at the lower end of the guide hole. The stand rod is supported in an upright position by being engaged and supported, and the bonnet is extended and supported in an open position, and the guide hole causes the stand rod to fall down as the bonnet is closed and swung. In the hood opening lock device configured to operate,
Provided on the free end side of the stand rod is a retaining portion that contacts the support so as to prevent the stand rod from coming off from the guide hole due to the swinging of the bonnet,
A notch forming a passage for incorporating the stand rod into the guide hole is provided in the support in a state of opening toward the lateral outer side of the support and communicating with the guide hole.

  According to the configuration of the first aspect of the present invention, the stand rod is connected to the bonnet before being assembled to the vehicle body side, the bonnet is assembled to the vehicle body side with the stand rod being connected, and the stand rod is connected to the bonnet. Even though the guide rod is not yet inserted into the guide hole and the stand rod is already provided with a retaining portion, the passage formed in the support is used. , it is fitted a site located on the proximal side of the stand rod than retaining portion a free end of the stand rod from the passage in the guide hole, the free end side of the stand rod inserted through the guide hole, and a stand rod The stand rod can be assembled in a predetermined assembly state where the retaining part of the stand is located on the side opposite to the base end side of the stand rod with respect to the guide hole. That.

  And when the bonnet is operated to open vigorously, even if the stand rod is difficult to engage with the lower end of the guide hole due to the inertia of the bonnet, the stand rod will not come out of the guide hole. The portion comes into contact with the support to prevent it from coming out.

  Therefore, the stand rod is connected to the bonnet before assembling to the vehicle body, the bonnet is assembled to the vehicle body with the stand rod connected, and the stand rod is inserted into the guide hole while being connected to the bonnet. The bonnet can be assembled using the assembly method. Moreover, there is no need to configure the stand rod retaining part in a retrofitted form, and it can be manufactured at a low cost by integrally molding the retaining part on the stand rod, or the need for attaching the retaining part after the stand rod is assembled is unnecessary. It can be done inexpensively.

  In this 2nd invention, the lower end of the said notch is arrange | positioned in the arrangement | positioning height higher than the lower end of the said guide hole.

  Since the stand rod slides along the lower end side of the guide hole, according to the configuration of the second aspect of the present invention, it is easy to avoid the stand rod floating from the lower end portion of the guide hole and entering the notch.

  Therefore, the stand rod can be assembled into the guide hole while being connected to the bonnet and the retaining portion is provided, but the stand rod is difficult to be removed from the assembly passage formed by the cutout. A highly reliable open lock device can be obtained so that the open lock can be accurately performed.

  In the third aspect of the invention, the free end portion of the stand rod is provided with a hook-shaped bent portion that forms the locking portion and the retaining portion.

  According to the configuration of the third invention, the stand rod can be provided with the locking portion and the retaining portion by providing the bent portion at the free end portion of the stand rod.

  Therefore, it is possible to provide the locking portion and the retaining portion easily by simply bending the free end portion of the stand rod, and it is possible to reduce the cost from this surface.

  In the fourth aspect of the invention, the bent portion is configured so that the size of the bent portion in the vertical direction is larger than the size of the guide hole in the vertical direction in a state where the bonnet is in the open posture. It is.

  According to the configuration of the fourth aspect of the present invention, even if the stand rod is about to come out of the guide hole due to the inertia of the bonnet that has been vigorously opened, the retaining portion is surely secured to the support by the size of the bent portion in the vertical direction. Can be prevented from coming off by the retaining portion with high accuracy.

  Therefore, the bonnet can be opened with a high degree of reliability so that the stand rod can be securely removed from the guide hole while it can be easily provided by simply bending the end of the stand rod. A locking device can be obtained.

It is a side view which shows the whole tractor. It is a side view which shows the inside of a drive part. It is a side view which shows the locked state of an open lock apparatus. It is a front view which shows a closing lock apparatus. It is a front view which shows the locked state of an open lock apparatus. (A) is a perspective view which shows the action state of a latching | locking part, (b) is a side view which shows the action | operation state of a latching | locking part. (A) is a perspective view which shows the action cancellation | release state of a latching | locking part, (b) is a side view which shows the action cancellation | release state of a latching | locking part. (A) is a perspective view which shows the point which attaches a stand rod to a guide hole, (b) is explanatory drawing which shows the point which attaches a stand rod to a guide hole. (A) is a front view which shows the upper part of a support body, (b) is a side view which shows the free end part of a stand rod, (c) is a side view which shows the action state of a retaining part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing the entirety of a tractor equipped with the bonnet opening lock device of the present invention. As shown in this figure, this tractor includes a self-propelled vehicle having a pair of left and right steering operations and front wheels 1 and 1 that can be driven and a pair of left and right rear wheels 2 and 2 that can be driven. A link mechanism 4 equipped with a pair of left and right lift arms 4a, 4a connected to the rear portion of the body frame 3 of the traveling vehicle so as to be swingable up and down is provided, and is erected upward from the rear portion of the body frame 3 toward the vehicle body. An overturn protection frame 5 is provided.

  The tractor constitutes the riding-type tiller by rotary plow device via a link mechanism 4 at the rear of the body frame 3 (not shown) is connected, various working devices are connected in place of the rotary tiller As a result, various riding-type work machines are configured.

  The self-propelled vehicle includes a driver's seat 6a provided at the rear of the vehicle body frame 3 and a riding-type driver 6 equipped with a steering wheel 6b positioned in front of the driver's seat 6a. It is a passenger type to drive.

  The self-propelled vehicle includes a driving portion 10 provided at a front portion of the body frame 3, and a transmission case 3 a that constitutes the body frame 3 with a driving force output from an engine 11 provided in the driving portion 10, and The transmission is transmitted to the left and right rear axles via the transmission case 3b to drive the left and right rear wheels 2 and 2, and the driving force of the engine 11 is transmitted from the transmission case 3b to the left and right front axles via the transmission shaft 8. It drives by driving the left and right front wheels 1, 1. The self-propelled vehicle includes a power take-out shaft 9 provided at the rear part of the transmission case 3b, and transmits the driving force of the engine 11 to a work device such as a rotary tiller connected from the power take-out shaft 9.

  Link mechanism 4 includes, in addition to a pair of left and right lift arms 4a, the 4a, horizontally and vertically in the lower portion of the transmission case 3b pivotally connected pair of right and left lower link 4b, a 4b, the left and right lift arms 4a, a 4a A pair of left and right lift rods 4c, 4c respectively connected to the lower links 4b, 4b.

  The link mechanism 4 connects the working device to the free end side of the pair of left and right lower links 4b and 4b, and connects the left and right lower links 4b and 4b by swinging up and down with the left and right lift arms 4a and 4a. The lifted working device is moved up and down.

  FIG. 2 is a side view showing the inside of the prime mover 10. As shown in FIG. 1 and FIG. 1, the prime mover 10 includes an engine 11, a radiator 12 for cooling the engine disposed in front of the engine 11, and a front drive portion of the engine 11 that is rotatably mounted. A cooling fan 13, a bonnet 14 that covers the upper side of the engine 11 and the radiator 12, a horizontal bonnet 15 that is located on both sides of the engine 11 and the radiator 12, and a lower part of the front end of the hood 14 in front of the radiator 12 And a front grille 16 provided at the position.

  As shown in FIG. 2, the bonnet 14 that covers the upper side of the engine 11 and the radiator 12 includes a connection bracket 20 that is fixed to the inside of the rear end side of the bonnet 14. The connecting bracket 20 is disposed on the rear side of the engine 11 so as to be rotatable on a support shaft 23 attached to a gate-shaped support frame 21 via a support member 22 when viewed from the front and rear of the vehicle body. The bonnet 14 is supported so that it can swing up and down around the lateral axis of the vehicle body of the support shaft 23.

  That is, the bonnet 14 is moved upward and swinging around the vehicle body lateral axis of the support shaft 23 as shown by a two-dot chain line in FIG. Then, the inside of the hood of the prime mover 10 is opened. As shown in FIG. 1 by a solid line and as shown in FIG. 2, the bonnet 14 is lowered and swung around the horizontal axis of the vehicle body of the support shaft 23 so as to overlap the upper ends of the front grill 16 and the horizontal bonnet 15. It becomes a descending closed posture and closes the inside of the hood of the prime mover 10.

  As shown in FIG. 2, on the front side of the radiator 12, there is provided a vehicle body vertical support body 25 fixed to the vehicle body frame 3 via a battery mounting base 24, and the upper end side of the support body 25 and the front end portion of the bonnet 14. A closing lock device 30 is provided. The closing lock device 30 fixes the bonnet 14 in the lowered closing posture. Next, the closing lock device 30 will be described.

  FIG. 4 is a front view showing the closing lock device 30. As shown in FIG. 2 and FIG. 2, the closing lock device 30 is made of a flat plate horizontally mounted inside the front end side of the bonnet 14 and the support pin 31 facing the vehicle body that is fixed to the upper end portion of the support body 25. A support member 32, a guide member 34 fixed to the stay 33 connected to the support member 32, a hook body 35 supported by the guide member 34, and a support arm 36 extending from the upper end of the guide member 34. And an operating shaft 37 rotatably supported at the front end of the bonnet 14.

  The hook body 35 is pivotally supported by the guide member 34 via the pivot pin 35a. By swinging the pivot member 35 around the pivot pin 35a, the opening side of the pin groove provided in the guide member 34 is arranged. Switching between a closed locking posture and an unlocking posture with a pin groove open.

  The operation shaft 37 is attached to an operation arm 38 extending from the lower end portion of the operation shaft 37 downward and forward of the vehicle body, and to an end portion on the upper end side of the operation shaft 37 so as to be positioned outside the bonnet 14 so as to be integrally rotatable. The release operation tool 39 is provided. The end of the operation arm 38 on the extending side is engaged with a notch provided in the upper end of the hook body 35. Operating arm end 38 and the supporting rod 32 Doo lock spring 35b is coupled over, the lock spring 35b is urges swing the hook body 35 in the locked position by swinging urging the operating arm 38 .

  The closing lock device 30 automatically locks the bonnet 14 in the lowered closed position as the bonnet 14 is operated in the lowered closed position.

  That is, with the bonnet 14 is lowered, the guide member 34 is lowered to the front side of the support 25, the support pins 31 lock spring 35b the hook body 35 is pressed acts on the inclined portion of the distal end of the hook body 35 in a locked position It enters the pin groove of the guide member 34 while swinging against it. When the bonnet 14 is in the lowered and closed posture and the support pin 31 enters the back of the pin groove, the hook body 35 returns to the locked posture by the swinging urging force of the lock spring 35b, and the guide member 34 is moved to the support pin 31 by the hook body 35. Fix and lock the bonnet 14 in the lowered and closed position.

  The closing lock device 30 releases the closing lock of the bonnet 14 when the release operation tool 39 is rotated around the axis of the operation shaft 37 toward the lock release side.

  That is, when the release operation tool 39 is rotated to the release side, the operation shaft 37 is rotated, the operation arm 36 is swung around the axis of the operation shaft 37, and the operation arm 36 locks the hook body 35 to the lock spring. The hook body 35 is moved to the unlocking posture against 35b, and the fixing of the guide member 34 to the support pin 31 is released.

  As shown in FIG. 2, an open lock device 40 is provided over the upper portion of the engine 11 and the rear end side of the bonnet 14. The release lock device 40 fixes the bonnet 14 in the ascending open posture. Next, the opening lock device 40 will be described.

  FIG. 5 shows the structure of the unlocking device 40 in a front view. As shown in FIG. 2 and FIG. 2, the release lock device 40 includes a vehicle body vertical support 41 fixed to the top of the engine 11 and a stand rod 42 connected to the inside of the rear end side of the bonnet 14. It is prepared.

  The support body 41 is fixed to the upper portion of the engine 11 by being connected to a stay 44 mounted on the upper portion of the engine 11 so as to support the air cleaner 43 for the engine.

  As shown in FIGS. 5 and 9, the support body 41 includes a guide hole 45 formed in a long hole shape that is long in the vehicle body vertical direction on the upper end side of the support body 41, and a guide hole just below the guide hole 45. 45 and a circular contact avoidance hole 46 provided a little apart from each other.

  The stand rod 42 is connected to a bracket 47 attached to the inside of the rear end side of the bonnet 14 by a connecting shaft 42 a provided on the base end side of the stand rod 42. The connecting shaft 42a is rotatably connected to the bracket 47, and the stand rod 42 is connected to the bonnet 14 so as to be swingable around the vehicle body lateral axis of the connecting shaft 42a. The connecting shaft 42 a is configured by a bent portion of the stand rod 42 provided at the base end portion of the stand rod 42. The stand rod 42 is urged to swing downward with respect to the bonnet 14 by a spring 48 attached to the connecting shaft 42a.

  Free end of the stand rod 42 is slidably inserted in the longitudinal direction of the stand rod 42 in the guide hole 45 of the support 41, the stand rod 42, when the bonnet 14 is operated to position the opening increases, When the bonnet 14 is brought into a standing posture by being erected by the guide hole 45, the bonnet 14 is lowered to the lying posture by the guide hole 45.

  That is, FIG. 3 shows the standing posture of the stand rod 42. As shown in FIG. 5 and FIG. 5, when the bonnet 14 is operated in the ascending open position, the bonnet 14 pulls up the base end side of the stand rod 42, and the guide hole 45 moves the stand rod 42 to the stand rod of the bonnet 14. An amount corresponding to the amount of movement of the bracket 47 is slid on the side where the bracket 47 as a connection point is slid, and the stand rod 42 is supported by the guide hole 45 and the bracket 47 raised relative thereto. It becomes a standing posture.

  FIG. 2 shows the lying posture of the stand rod 42. As shown in this figure, when the bonnet 14 is operated in the lowered and closed position, the bonnet 14 is operated to push down the proximal end side of the stand rod 42, and the guide hole 45 positions the stand rod 42 and the bracket 47 of the bonnet 14 is positioned. An amount corresponding to the amount of movement of the bracket 47 is slid on the opposite side to the side to be supported, and the stand rod 42 is supported by the guide hole 45 and the bracket 47 lowered with respect thereto, and is in a lying posture. become.

  FIG. 9B is a side view showing the free end portion of the stand rod 42. As shown in this figure, the stand rod 42 includes a locking portion 51 and a retaining portion 52 provided on the free end side of the stand rod 42. The locking part 51 includes an engaging recess 53 that opens downward in the vehicle body.

  FIG. 6A is a perspective view showing the operating state of the locking portion 51 of the stand rod 42. FIG. 6B is a side view showing the operating state of the locking portion 51 of the stand rod 42. As shown in figure Korare, turned attitude bonnet 14 is opened increases, if the stand rod 42 is turned upright posture, the wall portion 41a located around the lower end portion 45a of the guide hole 45 of the support 41 is By engaging with the engaging recess 53, the locking portion 51 engages with the lower end portion 45 a of the guide hole 45. At this time, the contact avoidance hole 46 of the support body 41 allows the front end portion 52a of the retaining portion 52 to enter the side surface 41b of the support body 41 so as not to contact the lower end portion 45a of the guide hole 45 of the locking portion 51. Enables engagement to. Locking portion 51 engaged with the lower end portion 45a of the guide hole 45 is supported received by the lower end portion 45a of the guide hole 45 to hold the stand rod 42 in the upright position against the load of the hood 14.

  FIG. 7A is a perspective view showing a state in which the locking portion 51 of the stand rod 42 is released. FIG. 7B is a side view showing a released state of the locking portion 51 of the stand rod 42. As shown in these drawings, the locking portion 51 of the stand rod 42 is separated from the lower end 45a of the guide hole 45 by slightly lifting the tip end portion of the stand rod 42 by hand. Allows change to a lying posture.

  FIG. 9C is a side view showing the operating state of the retaining portion 52 of the stand rod 42. As shown in this figure, the stopper portion 52 coming off the stand rod 42, the locking portion 51 regardless of the upright of the stand rod 42 due to the opening operation of the bonnet 14 is not well engaged to the lower end portion 45a of the guide hole 45 In this case, the stand rod 42 is prevented from coming out of the guide hole 45 by abutting on the side surface 41 b of the support body 41.

  FIG. 3 is a side view showing a locked state of the release lock device 40. FIG. 5 is a front view showing a locked state of the opening lock device 40. As shown in these drawings, the opening lock device 40, when the bonnet 14 is operated to open position increases, stand pulling up and stand rod 42 by the bonnet 14, by the standing operation of the stand rod 42 by the guide hole 45 When the rod is switched to the standing posture and the stand rod 42 is in the standing posture, the locking portion 51 of the stand rod 42 is engaged with the lower end portion 45a of the guide hole 45 to be received and supported, whereby the stand rod 42 is raised. The bonnet 14 is stretched and supported by the stand rod 42 held in an upright position.

  When the bonnet 14 is opened and operated, the bonnet 14 is opened with force, and the leading end 52a of the retaining portion 52 does not enter the contact avoidance hole 46 due to inertia of the bonnet 14 or distortion of the stand rod 42. , the locking portion 51 of the stand rod 42 is also a situation that does not successfully engage the lower end portion 45a of the guide hole 45 is generated, stop portion 52 coming off the stand rod 42 acts retained in contact with the support 41 This prevents the stand rod 42 from coming out of the guide hole 45.

  As shown in FIG. 2, when the bonnet 14 is closed from the lifted open position, the release lock device 40 is operated so that the locking portion 51 is disengaged from the lower end 45 a of the guide hole 45 and the bonnet 14 is lowered. Accordingly, the stand rod 42 can be switched to the lying down position by switching the stand rod 42 to the lowered position by the depression operation of the stand rod 42 by the bonnet 14 and the lowering operation of the stand rod 42 by the guide hole 45. To do.

  FIG. 9A is a perspective view showing the upper part of the support body 41. As shown in FIG. 8 and FIG. 8A, the support body 41 includes a notch 55 provided on the upper end portion of the support body 41 so as to be disposed on the lateral side of the guide hole 45. The notch 55 opens toward the lateral outer side of the support body 41 and communicates with the upper end of the guide hole 45, and a passage 56 for incorporating the stand rod 42 into the guide hole 45 from the lateral side of the support body 41. Is forming.

  That is, although the stand rod 42 is provided with the retaining portion 52, the stand rod 42 is connected to the bonnet 14 before being assembled to the support frame 21, and the bonnet 14 is connected to the stand rod 42. An assembling method for assembling the support frame 21 in a state can be employed.

  That is, when assembling the bonnet 14 in a state in which the stand rod 42 is connected to the support frame 21, leave posture open raised bonnet 14, through the passageway 56 of the free end from the side outside of the support member 41 of the stand rod 42 The guide hole 45 is assembled.

  FIG. 9B is a side view showing the free end portion of the stand rod 42. As shown in this figure, a hook-shaped bent portion 50 having a recessed portion that opens downward is provided at the free end portion of the stand rod 42, and the bent portion 50 prevents the locking portion 51 and the retaining rod 51 of the stand rod 42 from coming off. A portion 52 is formed. The recessed portion of the bent portion 50 is an engaging recessed portion 53 of the locking portion 51.

  That is, FIG. 9 (a), (b), as shown in (c), the size in the vertical direction of the bent portion 50 in a state in which the stand rod 42 is turned upright posture is a posture bonnet 14 is opened increases Is H1. Assuming that the substantial size of the guide hole 45 in the vertical direction is H2, the size H1 of the bent portion 50 in the vertical direction is set larger than the substantial size H2 of the guide hole 45 in the vertical direction. . As a result, the bent portion 50 becomes the retaining portion 51, and comes into contact with the side surface 41 b of the support body 41 to prevent the stand rod 42 from coming off.

  The size H1 in the vertical direction of the bent portion 50 is not set to be larger than the size H in the actual vertical direction of the guide hole 45, and is larger than the size H2 in the substantial vertical direction of the guide hole 45. The reason for setting a large value is as follows.

  As shown in FIG. 9A, the guide hole 45 includes a bottom hole B so as to have a support point that slidably supports the stand rod 42 in a state where it floats from the bottom of the guide hole 45. It is. The bottom hole portion B is configured to have a radius smaller than the radius of the stand rod 42 and is a portion where the bent portion 50 cannot be inserted. Accordingly, the size of the portion of the guide hole 45 excluding the bottom hole portion B in the vertical direction is slightly smaller by the bottom hole portion B than the size H of the guide hole 45 in the actual vertical direction. The size is set to a size H2 in the substantial vertical direction of the guide hole 45, and the size H1 in the vertical direction of the bent portion 50 (the retaining portion 52) is set larger than the size H2.

  As shown in FIG. 9 (b), the size in the vertical direction at the bent portion K where the bent portion 50 of the stand rod 42 starts when the bonnet 14 is in the ascending open position and the stand rod 42 is in the upright position. H3 is smaller than the size H4 of the straight portion of the stand rod 42 in the vertical direction. As shown in FIG. 9A, the width W in the vertical direction of the passage 56 is larger than the size H3 in the vertical direction at the bent portion K of the stand rod 42, and the straight portion of the stand rod 42 Is set to a width that is smaller than the size H4 in the vertical direction.

  That is, as shown in FIGS. 8A and 8B, when the stand rod 42 is assembled from the passage 56 to the guide hole 45 in the upwardly opened posture of the bonnet 14, the bent portion K of the stand rod 42 has the passage 56. Even if it can be passed, the straight portion of the stand rod 42 cannot pass through the passage 56.

  When this configuration is adopted, when the bonnet 14 is opened and closed, the straight portion of the stand rod 42 is positioned in the guide hole 45, so that the guide rod 42 can be prevented from entering the passage 56 from the guide hole 45, and the stand rod 42. Detachment from the guide hole 45 can be prevented.

  Note that the size H5 of the bent portion 50 of the stand rod 42 shown in FIG. 9B is the size of the bent portion 50 as viewed in the direction along the axis of the straight portion of the stand rod 42. The size H5 is smaller than the size H1 of the bent portion 50. Even if the stand rod 42 is pulled out from the guide hole 42 to the proximal end side of the stand rod 42 in a state where the straight portion of the stand rod 42 is in a horizontal posture, both lateral portions of the distal end portion of the bent portion 50 are guided. The portion that protrudes from the hole 42 to the side of the bottom hole B contacts the side surface 41 b of the support 41, and the stand rod 42 does not come out of the guide hole 42.

  As shown in FIG. 9A, the lower end of the guide hole 45 where the stand rod 42 is actually inserted is defined as the substantial lower end S of the guide hole 45, and the passage is more than the substantial lower end S of the guide hole 45. The lower end 55 a of the notch 55 is arranged at a higher arrangement height than the substantial lower end S of the guide hole 45 so that the lower end of 56 is positioned at a higher position.

  That is, the stand rod 42 is not easily lifted upward from the lower end side of the guide hole 45 due to the downward biasing by the spring 48, and even if the stand rod 42 is lifted from the lower end side of the guide hole 45, Due to the difference in arrangement height between the substantial lower end S and the lower end of the passage 56, it is difficult to enter the passage 56, so that it is easy to avoid the stand rod 42 coming off the guide hole 45 laterally.

[Another embodiment]
Instead of providing a bent portion 50 at the free end portion of the stand rod 42 and forming the retaining portion 52 by the bent portion 50, the free end portion of the stand rod 42 is subjected to pressure processing to project a protrusion, A configuration in which the retaining portion is formed by the protrusion or a configuration in which a pin is provided through the free end portion of the stand rod 42 and the pin is used as the retaining portion may be employed.

  The bonnet opening lock device according to the present invention can be used for various vehicles such as rice transplanters and transport vehicles in addition to tractors. Further, it can be used for a bonnet provided in a trunk part in addition to a bonnet provided in a driving part.

14 bonnet 41 support body 42 stand rod 45 guide hole 45a lower end portion of guide hole 50 bent portion 51 locking portion 52 retaining portion 55 notch 55a lower end of notch 56 passage H1 size of bent portion in vertical direction H2 guide Size of the hole in the vertical direction S Lower end of the guide hole

Claims (4)

A stand rod swingably connected to a bonnet swingable up and down, and a support body having a guide hole through which the stand rod is slidably inserted in the longitudinal direction of the stand rod;
As the bonnet is opened and swung, the guide hole raises the stand rod, and the locking portion located on the free end side of the stand rod engages with the lower end of the guide hole. The stand rod is supported in an upright position to support the bonnet in an open position, and the guide hole causes the stand rod to fall down as the bonnet is closed and swung. A bonnet opening lock device configured as follows:
Provided on the free end side of the stand rod is a retaining portion that contacts the support so as to prevent the stand rod from coming off from the guide hole due to the swinging of the bonnet,
A bonnet opening lock device provided in the support body in a state where a notch forming a passage for incorporating the stand rod into the guide hole is opened toward the lateral outer side of the support body and communicated with the guide hole. .   The bonnet opening lock device according to claim 1, wherein a lower end of the notch is arranged at a higher arrangement height than a lower end of the guide hole.   3. The bonnet opening lock device according to claim 1, wherein the free end portion of the stand rod is provided with a hook-shaped bent portion that forms the locking portion and the retaining portion.   4. The bent portion is configured such that, in a state where the bonnet is in an open posture, the size of the bent portion in the vertical direction is larger than the size of the guide hole in the vertical direction. Bonnet opening lock device.

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