JP2020073387A - Tractor - Google Patents

Abstract

To provide a tractor structured for an operator to release locking of an engine hood in a natural posture while preventing another person from easily releasing locking of the engine hood.SOLUTION: The tractor includes an engine hood 7, an engine frame, a lock part 60, an operation wire 41 and a cover member 42. The lock part 60 locks opening of the engine hood 7. The operation wire 41 is connected with the lock part 60. By performing a releasing operation of moving an operated position 41b, locking of the lock part 60 can be released. The operated position 41b is arranged at a position which is outside the engine frame in the horizontal direction and is exposed to the outside. The cover member 42 is structured to cover the operation wire 41 so that the operation wire 41 cannot be operated by hand and can be operated at least using a predetermined releasing tool 100, and is formed with an opening part 42a having such a shape as to meet a traveling locus of the operated position 41b of the operation wire 41.SELECTED DRAWING: Figure 4

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a tractor having a structure that prevents a lock for opening a bonnet from being easily released.

  Conventionally, a tractor has been provided with a lock portion for locking the opening of the hood and a release operation portion for releasing the lock of the lock portion. Patent documents 1 and 2 disclose tractors of this type.

  The tractor of Patent Document 1 is provided with an operation unit (release operation unit) below the bonnet. When the operator pulls this operation portion by hand, the lock for opening the bonnet is released.

  The tractor of Patent Document 2 is provided with a release rod (release operation portion) inside the bonnet. The operator inserts the release member from below the bonnet and operates the release rod to unlock the opening of the bonnet.

JP, 2011-255695, A Japanese Patent No. 5536696

  However, with the tractor of Patent Document 1, the bonnet can be unlocked simply by operating it by hand, so that another person can easily open the bonnet. Further, the tractor of Patent Document 2 has a configuration in which a lock is released by inserting a release member inside the bonnet from below. Therefore, the operator has to perform the unlocking work of the bonnet in a posture in which the load is applied.

  The present invention has been made in view of the above circumstances, and the main purpose thereof is to prevent the lock of the bonnet from being easily unlocked by another person, while the operator unlocks the bonnet in a comfortable posture. It is to provide a tractor with a possible configuration.

Means and effects for solving the problems

  The problem to be solved by the present invention is as described above. Next, means for solving the problem and its effect will be described.

  According to the viewpoint of the present invention, a tractor having the following configuration is provided. That is, this tractor includes a bonnet, an engine frame, a lock portion, a release operation portion, and a cover member. The engine is arranged inside the bonnet. The engine frames are provided in a left-right pair and are arranged so that their longitudinal directions coincide with the front-rear direction, and support the engine. The lock portion locks the opening of the bonnet. The release operation part is connected to the lock part, and the lock of the lock part can be released by performing an operation of moving the operated part, and the operated part is an outer side in the left-right direction of the engine frame. And, it is arranged at a position exposed to the outside. The cover member covers the release operation part so that the release operation part cannot be operated by hand and can be operated by using at least a predetermined release tool, and a movement locus of an operated portion of the release operation part. An opening having a shape along the line is formed.

  Accordingly, since the release operation portion is covered with the cover member, it is possible to prevent the lock of the bonnet from being easily released by another person. Further, since the release operation portion is arranged outside and outside the engine frame, the operator can release the lock of the bonnet using the release tool in a comfortable posture.

  In the above-mentioned tractor, it is preferable that the cover member is configured to include two sheet metal members arranged with a space therebetween, and the release operation part is arranged between the two sheet metal members. ..

  Accordingly, the cover member can be made inexpensive and lightweight by using the sheet metal member.

  In the above-mentioned tractor, it is preferable that the two sheet metal members be formed with elongated holes as the openings at positions corresponding to each other.

  Accordingly, the release tool can be passed through so as to pass through both the long holes of the two sheet metal members, so that the operator can easily apply force. Therefore, the lock of the bonnet can be released more easily by using the release tool.

  The tractor preferably has the following configuration. That is, the release operation is an operation of moving the operated portion of the release operation portion in the release direction. The release operation portion is formed of a rod-shaped member, and is bent so that at least the release direction side is closed to form an operated portion.

  Accordingly, since the operation of unlocking the lock portion is a simple operation, various tools can be used as the release tool as long as they can be inserted into the opening portion, so that convenience can be improved.

  The tractor preferably has the following configuration. That is, this tractor includes a mounting plate to which the cover member is detachably mounted using a fixture. The space above the mounting plate is covered with the bonnet. The fixture can be removed by operating from the inner surface of the bonnet of the mounting plate, and cannot be removed by operating only from the outer surface of the mounting plate.

  Thus, by removing the cover member, the bonnet can be unlocked with a hand. Therefore, at the time of maintenance, the work of opening the bonnet becomes simple. Further, since the cover member cannot be removed from the outer surface, it is possible to prevent the bonnet from being easily unlocked when the tractor is placed outdoors, for example.

The side view which shows the structure of the tractor which concerns on one Embodiment of this invention. The front perspective view which shows the structure inside a bonnet. The perspective view which shows the structure of a lock release part and a lock part. The perspective view which shows a bonnet and a bonnet frame. The front view which shows the structure of a lock release part and a lock part. The exploded perspective view of a cover member. The perspective view which shows a mode that a cover member is covered on an operation wire. The perspective view which shows a mode that a cover member is attached to an attachment plate.

  Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a configuration of a tractor 1 according to an embodiment of the present invention. FIG. 2 is a front perspective view showing the internal structure of the hood 7. In addition, in the following description, when describing as "left", "right", etc., it means left and right toward the direction in which the tractor 1 advances.

  The tractor 1 shown in FIG. 1 is configured so that various working machines such as plows, harrows, and loaders can be mounted as necessary to perform various types of work. A front wheel 4 is arranged at the front part of the tractor 1, and a rear wheel 5 is arranged at the rear part.

  A hood 7 is arranged in the front part of the tractor 1, and an engine room is formed inside the hood 7. The opening of the bonnet 7 is locked by a lock portion 60 arranged inside. Below the front part of the bonnet 7, a lock release part 40 is arranged. The lock of the lock unit 60 can be released by operating the lock release unit 40 (details will be described later). By releasing the lock of the lock portion 60, the bonnet 7 can be opened and closed by rotating with the rear upper end portion as a rotation fulcrum (see the chain line in FIG. 1). By opening the bonnet 7, the operator can access the engine room and perform maintenance or the like.

  As shown in FIG. 1, a cabin 6 for an operator to board is disposed behind the bonnet 7, and an operation unit 25 and a seat 26 for performing various operations are provided inside the cabin 6. Has been. The operator of the tractor 1 can perform traveling operation and the like of the tractor 1 via the operation unit 25.

  As shown in FIG. 2, the body of the tractor 1 is configured to include an engine frame 2 arranged in a pair on the left and right, and a mission case 21 fixed to a rear portion of the engine frame 2. The engine frame 2 is arranged so that its longitudinal direction coincides with the front-rear direction. Further, the front parts of the pair of left and right engine frames 2 are connected. The engine frame 2 supports the engine 3 directly or via a vibration isolating member or the like. The engine 3 is a common rail type diesel engine having a plurality of cylinders.

  Further, the engine frame 2 is provided with a pair of left and right plate-shaped mounting plate support portions 2a that are arranged so as to face upward (the thickness direction is the vertical direction). Further, a mounting hole (not shown) is formed in the mounting plate support portion 2a. The mounting plate 10 is mounted on the upper surface of the mounting plate support portion 2a by using the mounting holes and fixing tools such as bolts and nuts. In this way, the engine frame 2 (mounting plate support portion 2a) supports the mounting plate 10. Further, the mounting plate 10 is mounted in front of the portion supporting the engine 3. The fan shroud 12, the radiator 13, the battery 14, the engine controller 15, the air cleaner 16, and the lock portion 60 are arranged on the mounting plate 10 directly or via another member.

  A front axle case 22 is attached to the lower side of the engine frame 2. The front wheel 4 is attached to the front axle case 22 via the front axle 4a. The rear wheel 5 is attached to the mission case 21 via the rear axle 5a. The upper portions of the left and right rear wheels 5 are covered by the left and right rear fenders 23.

  The mission case 21 decelerates the power from the engine 3 and transmits the power to the front axle case 22 and the rear axle 5a. The operator can change the gear ratio in the transmission case 21 and adjust the traveling speed of the tractor 1 by operating the shift lever of the gear shift operating device (not shown).

  A part of the driving force of the engine 3 is transmitted to the PTO shaft (not shown) protruding from the rear end of the transmission case 21. The tractor 1 is configured so that the working machine described above can be mounted on the rear end thereof. The PTO shaft can drive the work machine via a universal joint or the like (not shown).

  The tractor 1 configured in this way can perform various operations such as plowing, sowing, and harvesting while traveling in the field.

  Next, configurations of the unlocking unit 40 and the locking unit 60 will be described with reference to FIGS. 2 to 5. FIG. 3 is a perspective view showing the configurations of the lock release unit 40 and the lock unit 60. FIG. 4 is a perspective view showing the bonnet 7 and the bonnet frame 7a. FIG. 5 is a front view showing the configurations of the lock release section 40 and the lock section 60.

  As shown in FIGS. 1 and 3, a bonnet frame 7 a is arranged inside and in the front part of the bonnet 7. The bonnet frame 7a is a member that extends in the vertical direction, and the fixing portion 7c is connected to the upper portion. The bonnet frame 7a is fixed to the inner wall surface on the front side of the bonnet 7 by a fixing tool such as a bolt using a mounting hole (not shown) formed in the fixing portion 7c. Therefore, the bonnet frame 7a rotates integrally with the bonnet 7. A lock bar 7b is formed below the bonnet frame 7a. The lock portion 60 locks the opening of the bonnet 7 by holding the lock bar 7b. The lock portion 60 is arranged in front of the fan shroud 12 to the engine controller 15 and below the air cleaner 16.

  First, the configuration of the lock unit 60 will be described. As shown in FIGS. 3 and 5, the lock portion 60 includes a base plate 61, a first lock plate 62, a second lock plate 63, a stopper 64, a rotating pin 65, a biasing spring 66, Equipped with.

  The base plate 61 is attached to the upper surface (inside the bonnet 7) of the attachment plate 10 by a fixture such as a bolt and a nut. The first lock plate 62 is attached to the base plate 61 with a fixture such as a bolt and a nut. The first lock plate 62 is formed with a notch 62a that is open upward. When the lock portion 60 locks the opening of the bonnet 7, the lock bar 7b is inserted in the notch 62a. The second lock plate 63 is rotatably attached to the first lock plate 62 by a rotation pin 65. The second lock plate 63 is formed with a closing portion 63a that closes the upper portion of the notch 62a. Further, the first lock plate 62 and the second lock plate 63 are biased by a biasing spring 66 in a direction in which the closing portion 63a closes the upper portion of the notch 62a.

  With this configuration, when the external force is not applied, the notch 62a and the closing portion 63a hold the lock bar 7b, so that the opening of the bonnet 7 is locked. Further, a mounting hole is formed in the second lock plate 63, and the operation wire 41 (specifically, the engaging portion 41a) is engaged with the mounting hole. When the operation wire 41 is pulled, the closing portion 63a rotates in the direction away from the notch 62a (see the chain line in FIG. 5). As a result, the lock bar 7b is no longer held, and the lock of the lock portion 60 is released. The second lock plate 63 comes into contact with the stopper 64 when the second lock plate 63 rotates a predetermined amount or more. As a result, excessive rotation of the second lock plate 63 can be prevented.

  In the state where the lock of the lock portion 60 is released, the operator can lift the bonnet 7 by hand. Here, inside the bonnet 7, a plurality of gas dampers that connect a member that rotates with the rotation of the bonnet 7 and a member that does not rotate even when the bonnet 7 rotates are arranged. As a result, the operator can smoothly open and close the bonnet 7 when the lock portion 60 is unlocked.

  Next, the configuration of the unlocking unit 40 will be described. As shown in FIGS. 3 and 5, the lock release section 40 includes an operation wire (release operation section) 41 and a cover member 42.

  The operation wire 41 is a rod-shaped member, and connects the lock release portion 40 to the lock portion 60. The operation wire 41 is arranged so as to pass through the insertion hole 10a which is a through hole formed in the mounting plate 10. In other words, a part of the operation wire 41 is arranged inside the bonnet 7, and a remaining part of the operation wire 41 is arranged outside the bonnet 7. Further, the longitudinal direction of the operating wire 41 and the operating direction of the operating wire 41 are obliquely downward right.

  A hook-shaped engaging portion 41a is formed by bending at one end of the operation wire 41 (the end located on the inside of the bonnet 7). The engagement portion 41a is engaged with the second lock plate 63 as described above. An annular operated portion 41b is formed by bending at the other end of the operating wire 41 (the end located on the outside of the bonnet 7). The operated portion 41b is a portion that is operated to unlock the lock portion 60. In the present embodiment, the locked portion 60 is unlocked by moving the operated portion 41b to one side (outside) in the longitudinal direction of the operation wire 41. Hereinafter, this operation is referred to as a release operation. The longitudinal direction of the operation wire 41 and the direction in which the operated portion 41b is moved need not be exactly the same. Further, hereinafter, the direction in which the operated portion 41b is moved during the releasing operation is referred to as the releasing direction.

  It is assumed that the releasing operation is performed using the releasing tool 100 instead of the hand. As shown in FIG. 3, the releasing tool 100 has an elongated cylindrical portion for operating the operation wire 41, and a hole portion for attaching to a key holder or the like. The operator releases the lock of the lock portion 60 by inserting the columnar portion of the release tool 100 into the operated portion 41b and moving it in the release direction. The operated portion 41b is arranged outside the engine frame 2 (specifically, further to the right of the right engine frame 2) and exposed to the outside. Therefore, since the operator can easily confirm the position of the operated portion 41b, the operator can easily unlock the lock portion 60 by using the unlocking tool 100. Further, since the operator does not need to insert the release tool 100 into the hood 7, the lock of the lock portion 60 can be released in a comfortable posture.

  In addition, in the present embodiment, it is possible to reduce the trouble when the release tool 100 is lost and prevent another person from easily opening the hood 7. That is, it is preferable to use a dedicated release tool (cylinder key or the like) in order to more reliably prevent others from opening the bonnet 7. However, with this configuration, if the dedicated releasing tool is lost or is forgotten in another place, the bonnet 7 cannot be opened. In this respect, in the present embodiment, the lock of the bonnet 7 can be released even by using a member (for example, a screwdriver) that can be inserted into the opening 42a and has a certain degree of strength, instead of a dedicated release tool. .. Thereby, even if the release tool 100 is lost or forgotten, the hood 7 can be opened.

  Further, since the operated portion 41b has an annular shape, the release direction side is closed, and a force is easily applied in the release direction. In order to make it easier to apply a force in the release direction, it is sufficient if the release direction side is closed. Further, since the operation wire 41 is biased to the opposite side in the releasing direction by the rotating pin 65, it is not necessary to move the operated portion 41b to the opposite side in the releasing direction even when the bonnet 7 is locked. There is (the lock is automatically applied by closing the hood 7). Therefore, the operated portion 41b may have a U shape (specifically, a U shape in which the diagonally lower right side which is the releasing direction side is closed), like the engaging portion 41a.

  The cover member 42 is attached to the lower surface of the attachment plate 10 (outside the hood 7). Therefore, the cover member 42 is arranged below the mounting plate 10 (that is, outside the bonnet 7). The cover member 42 is configured to cover the operated portion 41b. Further, the cover member 42 is formed with an opening 42a which is a through hole. The opening 42a is a portion into which the release tool 100 is inserted to perform a release operation. The opening 42a has a shape that follows the movement trajectory of the operated portion 41b during the release operation. Specifically, the opening 42a is a long hole, and its longitudinal direction and the above-described releasing direction substantially coincide with each other. Thereby, the cover member 42 also has a function as a guide for moving the operation wire 41 in an appropriate direction.

  The cover member 42 is a member for preventing the operation wire 41 from being easily operated by another person. Specifically, it is a member for preventing others from easily opening the bonnet 7. Therefore, the cover member 42 is configured such that the operation wire 41 cannot be operated by hand and the operation wire 41 can be operated by the release tool 100. Specifically, the diameter of the cylindrical portion of the release tool 100 is smaller than the size of a typical finger. The openings 42a of the cover member 42 are spaced so that a finger cannot enter them. Further, although a gap 42b is formed at the lower end of the cover member 42 in the releasing direction, the gap 42b is also large enough to prevent a finger from entering. That is, all the gaps formed in the cover member 42 (the gaps that allow access to the operated portion 41b) are all smaller than the size of a typical finger. Further, the cover member 42 is arranged at a position where the operation wire 41 (particularly the engaging portion 41 a) does not protrude from the cover member 42.

  Next, a manufacturing method and a specific configuration of the cover member 42, and a mounting method of the cover member 42 will be described. FIG. 6 is an exploded perspective view of the cover member 42. FIG. 7 is a perspective view showing how the operation wire 41 is covered with the cover member 42. FIG. 8 is a perspective view showing how the cover member 42 is attached to the attachment plate 10.

  As shown in FIG. 6, the cover member 42 is configured by joining the first sheet metal member 70 and the second sheet metal member 80 by welding.

  The first sheet metal member 70 has a main body 71, a mounting portion 72, and a connecting portion 73. The main body portion 71 is an elongated portion formed along the longitudinal direction of the operation wire 41. A long hole 71a is formed in the main body 71. The long hole 71a is a part of the opening 42a, and the long hole 71a and the long hole 81a (described later) form the opening 42a. The mounting portion 72 is a portion formed by bending so as to be substantially parallel to the mounting plate 10. A mounting hole 72 a for mounting on the mounting plate 10 is formed in the mounting portion 72. A bolt 75 is joined to the lower surface of the mounting portion 72 by welding. Specifically, as shown in FIG. 7, the bolt 75 is inserted from the lower surface of the mounting plate 10 (the outer surface of the bonnet 7) into the mounting hole 72a so that the head portion is on the lower side. It is welded to the lower surface of the mounting plate 10. The connecting portion 73 is a portion substantially perpendicular to the main body portion 71, and is a portion for joining to the second sheet metal member 80, as shown in FIG.

  A main body portion 81 and a connecting portion 82 are formed on the second sheet metal member 80. The main body 81 is an elongated portion formed along the longitudinal direction of the operation wire 41. The body portion 81 is formed with a long hole 81a and a protruding portion 81b. As described above, the long hole 71a and the long hole 81a form the opening 42a that is a through hole. The protruding portion 81b is a portion protruding from the main body portion 81 toward the mounting plate 10 side. The protruding portion 81b is inserted into the insertion hole 10a through which the operation wire 41 is inserted. The connecting portion 82 is a portion substantially perpendicular to the main body portion 81, and is a portion for joining with the first sheet metal member 70, as shown in FIG. 6.

  As described above, by welding the connecting portion 73 of the first sheet metal member 70 to the main body portion 81 and the connecting portion 82 of the second sheet metal member 80 to the first sheet metal member 70, the substantially box-shaped cover member 42. Is formed. As a result, the main body 71 and the main body 81 are welded so that they are substantially parallel to each other and the positions of the long holes 71a and the long holes 81a correspond to each other.

  Next, the cover member 42 is attached to the attachment plate 10. Specifically, as shown in FIG. 7, the cover member 42 is set so that the operation wire 41 is located in the internal space of the cover member 42. Then, as shown in FIG. 8, the mounting holes 10b formed in the mounting plate 10 are aligned with the bolts 75 protruding upward from the mounting holes 72a of the first sheet metal member 70. Then, the bolts 75 protruding upward from the mounting holes 10b are fastened by the nuts 44. As a result, the cover member 42 is attached to the attachment plate 10.

  As described above, since the cover member 42 is attached by the bolt 75 and the nut 44, the cover member 42 can be removed by removing the nut 44. Therefore, it is not necessary to use the release tool 100 every time the bonnet 7 is opened by removing the cover member 42 at the time of inspection before repair of the tractor 1 and at the time of repair, etc. (the lock can be released by hand).

  Further, since the nut 44 is arranged inside the bonnet 7 and the bolt 75 is joined by welding, the nut 44 cannot be removed unless the lock portion 60 is unlocked to open the bonnet 7. .. In other words, the cover member 42 is made detachable to improve the handleability at the time of inspection and the like, and since the cover member 42 cannot be removed by another person, it is possible to prevent the crime prevention from being lowered. The bolt 75 is a low head bolt, but other bolts may be used. Further, the bolt 75 may not be welded to the mounting plate 10.

  The members arranged around the nut 44 will be specifically described. The bonnet 7 is arranged on the front side, the upper side, and the left and right sides of the nut 44. Further, the mounting plate 10 is arranged below the nut 44. As shown in FIG. 2, the fan shroud 12 to the battery 14 are arranged behind the nut 44. Thus, the nut 44 cannot be accessed without opening the bonnet 7.

  As described above, the tractor 1 of the present embodiment includes the bonnet 7, the engine frame 2, the lock portion 60, the operation wire 41, and the cover member 42. The engine 3 is arranged inside the bonnet 7. The engine frames 2 are provided in a pair of left and right, are arranged such that their longitudinal directions coincide with the front-rear direction, and support the engine 3. The lock portion 60 locks the opening of the bonnet 7. The operation wire 41 is connected to the lock portion 60, and the lock of the lock portion 60 can be released by performing a release operation of moving the operated portion 41b. The operated portion 41b is arranged outside the engine frame 2 in the left-right direction and at a position exposed to the outside. The cover member 42 covers the operation wire 41 so that the operation wire 41 cannot be operated by hand and can be operated by using at least a predetermined release tool 100, and the operated portion 41b of the operation wire 41 is moved. An opening 42a having a shape along the locus is formed.

  Accordingly, since the operation wire 41 is covered with the cover member 42, it is possible to prevent the lock of the bonnet 7 from being easily released by another person. Further, since the operation wire 41 is arranged outside and outside the engine frame 2, the operator can unlock the hood 7 with the unlocking tool 100 in a comfortable posture.

  Further, in the tractor 1 of the present embodiment, the cover member 42 is configured to include the first sheet metal member 70 and the second sheet metal member 80 that are arranged with a space therebetween, and the first sheet metal member 70 and the second sheet metal. The operation wire 41 is arranged between the members 80.

  As a result, the cover member 42 can be made inexpensive and lightweight by using the sheet metal member.

  Further, in the tractor 1 of the present embodiment, the first sheet metal member 70 and the second sheet metal member 80 are formed with elongated holes 71a and 81a as openings 42a at positions corresponding to each other.

  This allows the release tool 100 to pass through the elongated holes 71a and 81a of both the first sheet metal member 70 and the second sheet metal member 80, so that the operator can easily apply force. Therefore, the lock of the bonnet 7 can be released more easily by using the release tool 100.

  Further, in the tractor 1 of the present embodiment, the releasing operation is an operation of moving the operated portion 41b of the operating wire 41 in the releasing direction. The operation wire 41 is composed of a rod-shaped member, and is bent so that at least the release direction side is closed to form an operated portion 41b.

  Accordingly, since the operation of unlocking the lock portion 60 is a simple operation, various tools can be used as the release tool as long as they can be inserted into the opening 42a, so that convenience can be improved.

  Further, the tractor 1 of the present embodiment includes the mounting plate 10 to which the cover member 42 is detachably mounted using the nut 44. The space above the mounting plate 10 is covered by the bonnet 7. The nut 44 can be removed by operating from the surface of the mounting plate 10 on the inner side of the hood 7, and cannot be removed even by operating only from the outer surface of the mounting plate 10.

  Accordingly, by removing the cover member 42, the lock of the bonnet 7 can be released by using the hand. Therefore, at the time of maintenance, the work of opening the bonnet 7 is simplified. Further, since the cover member 42 cannot be removed from the outer surface, it is possible to prevent the lock of the hood 7 from being easily released when the tractor 1 is placed outdoors, for example.

  Although the preferred embodiment of the present invention has been described above, the above configuration can be modified as follows, for example.

  In the above-described embodiment, the lock release part 40 is attached to the surface on the opposite side of the attachment plate 10 to which the lock part 60 is attached, but if it is connected by the operation wire 41 or the like, another member (the lock part 60). Member different from the mounting destination).

  In the above embodiment, the lock releasing portion 40 is configured to be removable, but it may be non-removable by being joined to the mounting plate 10 or the like by welding or the like.

  In the above embodiment, the release operation is an operation of moving (pulling) the operated portion 41b in a direction away from the lock portion 60 (bonnet 7), but moving the operated portion 41b in a direction of approaching the lock portion 60 (pressing). Operation). Further, the release operation is not limited to the operation of moving in one direction, and may be an operation of moving in the first direction and then in the second direction different from the first direction. In this case, the opening of the cover member is also configured to include a portion along the first direction and a portion along the second direction.

  In the above embodiment, the lock portion 60 is arranged near the front end of the bonnet 7, but it may be arranged at another position (for example, near the upper end of the bonnet 7).

  The tractor 1 of the above-described embodiment is a type in which the operating portion 25 and the seat 26 are covered by the cabin 6, but a tractor in which the operating portion and the seat are not covered by the cabin (exposed to the outside) is also used. The present invention can be applied.

1 tractor 2 engine frame 3 engine 5 rear wheel 40 lock release section 41 operation wire (release operation section)
42 cover member 75 bolt 44 nut (fixture)
60 Lock part

According to the viewpoint of the present invention, a tractor having the following configuration is provided. That is, the tractor is provided with a bonnet, and the lock portion, and the releasing operation portion. The engine is arranged inside the bonnet . Before Symbol lock unit is configured to lock the opening of the hood. The release operation unit, to release the lock of the lock portion. The release operation unit is arranged at a position exposed to the outside of the body of the tractor. A cover member is provided to cover the release operation unit.

Accordingly, since the release operation portion is covered with the cover member, it is possible to prevent the lock of the bonnet from being easily released by another person .

In the above-mentioned tractor, it is preferable that the cover member is formed with an opening having a shape along a movement locus of the operated portion of the release operation portion .

In the tractor, it is preferable that the opening is formed in a long hole shape.

Claims (5)

The hood where the engine is placed inside,
An engine frame that is provided in a pair of left and right, is arranged so that the longitudinal direction thereof coincides with the front-rear direction, and supports the engine,
A lock portion that locks the opening of the bonnet,
It is connected to the lock part, and the lock of the lock part can be released by performing an operation of moving the operated part, and the operated part is outside in the left-right direction of the engine frame and With the release operation part that is arranged at the exposed position,
In order to prevent the release operation part from being operated by hand, and to cover the release operation part so that it can be operated using at least a predetermined release tool, a shape along the movement trajectory of the operated portion of the release operation part A cover member having an opening,
A tractor comprising: The tractor according to claim 1, wherein
The tractor characterized in that the cover member is configured to include two sheet metal members that are arranged at intervals, and that the release operation portion is arranged between the two sheet metal members. The tractor according to claim 2, wherein
A tractor characterized in that long holes as the openings are formed at positions corresponding to each other on the two sheet metal members. The tractor according to any one of claims 1 to 3,
The operation of releasing the lock of the lock portion is an operation of moving the operated portion of the release operation portion in the release direction,
The tractor is characterized in that the release operation part is composed of a rod-like member, and an operated portion is formed by bending the release operation part so that at least the release direction side is closed. The tractor according to any one of claims 1 to 4,
The cover member includes a mounting plate detachably mounted using a fixture,
The space above the mounting plate is covered by the bonnet,
The fixing device is removable by operating from a surface of the mounting plate on the inner side of the bonnet, and is not removable even by operating only from an outer surface of the mounting plate. A tractor to do.

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