JP4746415B2 - Opening and closing structure of bonnet in rolling compaction vehicle - Google Patents

Description

  The present invention relates to a rolling vehicle used for compacting a ground or a road surface, such as a rolling roller, and more specifically to a bonnet opening / closing structure.

  FIG. 6A is a side view showing an example of an iron wheel type rolling roller. In the rolling roller R, a front vehicle body 3 that pivotally supports the front roll 1 and a rear vehicle body 4 that pivotally supports the rear roll 2 are connected to each other in an articulated manner by a connecting portion 5. A driver's seat 6 is formed on the upper portion of the front vehicle body 3. The rear vehicle body 4 is mainly formed as a casing constituting an engine room. Inside the rear vehicle body 4 is an engine E which is a travel drive source, and is driven by the engine E, and is mounted on the front roll 1 and the rear roll 2. A hydraulic pump (not shown) for supplying pressure oil to a hydraulic motor (not shown), a pressure oil storage tank T, a battery B, and the like are mounted. A pivotable bonnet 7 is attached to the upper part of the rear vehicle body 4 so as to maintain an open state at a predetermined position (hereinafter, this position is referred to as an open fixed position).

  When the engine E is inspected at the start of work, as shown in FIG. 6B, the operator holds the tip of the bonnet 7 and rotates it upward to the open fixed position. Here, a rolling vehicle such as the rolling roller R is generally a large vehicle, so that the mounting position of the bonnet 7 from the ground tends to be high. Therefore, in consideration of convenience, when the open fixing position of the bonnet 7 is limited to a range that can be reached by the worker, the position of the bonnet 7 when closed is originally high, so that the opening area when opened is small. There is a problem that it is easy.

  Conventionally, for a relatively light work such as a start-up inspection of the engine E, the bonnet 7 is used for a maintenance work with a certain amount of labor, such as a battery B replacement work, although this limited opening area has not been a problem. There was a tendency to get in the way. In addition, each device mounted in the rear vehicle body 4 is laid out on the condition that maintenance work can be performed even in a limited opening area, and there is a problem that the layout design of each device is easily restricted. is there.

On the other hand, in order to secure a large opening area, a conventional rolling vehicle has a type in which the bonnet is not slid upward but is slid horizontally. Patent Document 1 discloses a technique in which an auxiliary inspection door is separately provided on the upper surface of a bonnet that opens and closes in order to increase the efficiency of maintenance work.
Utility Model Registration No. 2567711

  In the case of the former structure in which the bonnet is slid sideways, there is a problem that the opening / closing mechanism tends to be complicated, so that the assembling property is poor and the manufacturing cost tends to be high. Further, in the technique of providing the latter auxiliary inspection door on the upper surface of the bonnet, it is necessary to attach a lifting step to the vehicle body so that an operator can face the auxiliary inspection door, so that the production cost is likely to increase. There is also a problem, and since the worker needs to perform maintenance work with this foot on, there is also a problem that the working posture tends to become unstable.

  The present invention was devised to solve the above-described problems, and in a compaction vehicle that can reduce the manufacturing cost with a simple structure and can easily perform maintenance work of an apparatus mounted in a bonnet. The object is to provide a hood opening and closing structure.

  In order to solve the above-mentioned problems, the present invention relates to an opening / closing structure of a bonnet that rotates about a support shaft in a compaction vehicle, and a first connection in which one end side is rotatably connected around a vehicle body connection shaft provided on the vehicle body side. A second end of the first connecting member is rotatably connected to the other end of the first connecting member via a link connecting shaft. One end of the member is rotatably connected to a bonnet connecting shaft provided on the bonnet side. A stopper capable of contacting the other connecting member is formed on one of the two connecting members, and the position of the bonnet connecting shaft relative to the vehicle body connecting shaft is limited when the bonnet is opened. When the hand is released from the bonnet when the point is reached, the link connecting shaft is displaced in one direction due to the weight of both connecting members, and the stopper comes into contact with the other connecting member to rotate both connecting members. A bonnet opening / closing structure that is regulated and maintains the open and fixed position of the bonnet, wherein the vehicle body connecting shaft is configured to be linearly movable with the position when the bonnet is closed as a base point position. In the process of opening and closing the bonnet in the closed state to the first opening and fixing position, the vehicle body connecting shaft is positioned at the base position, and the first opening and fixing position is provided. In the process of further opening the bonnet, the vehicle body connecting shaft moves linearly and is positioned by the positioning means at a predetermined movement position, so that the bonnet has a second degree of opening larger than the first opening fixing position. A bonnet opening / closing structure in a rolling compact vehicle characterized by being maintained in an open fixed position.

  According to this opening / closing structure, for example, the first open fixing position is set within a range where the hand of an operator standing on the ground can reach the tip of the bonnet, and the second open fixing position is set within a range out of reach of the hand, In other words, it can be set at a position having a large opening area. Therefore, the bonnet is set to the first open and fixed position for daily work such as engine start inspection, and the bonnet is set to the second open and fixed position for infrequent maintenance work such as battery replacement. Just do it. Even when the battery is replaced, the bonnet is wide open so that it does not interfere with the work. Further, since the bonnet opens widely, the layout design of the internal device considering the maintenance work is not easily restricted. Furthermore, since the opening and fixing position of the bonnet can be set in two stages with a simple structure, the manufacturing cost of the opening / closing mechanism can be suppressed.

  According to the present invention, the positioning means has a configuration in which the first connecting member is fixed to the vehicle body side via an engaging / disengaging engagement pin. did.

  According to this opening / closing structure, a positioning means having a simple structure and excellent operability can be realized.

  Further, the present invention is provided with a support bracket that is fixed to the vehicle body side, has a long hole that guides the linear movement of the vehicle body connecting shaft, and has an engagement hole that engages with the engagement pin. A bonnet opening and closing structure in a rolling compact vehicle characterized by this.

  According to this opening / closing structure, the bonnet opening / closing structure has a small number of parts and is excellent in assembling. Further, when the vehicle body connecting shaft is positioned at the end of the long hole, for example, the engaging pin hole provided on the first connecting member side and the engaging hole formed in the support bracket are overlapped. The engaging pins can be easily inserted into these holes.

  According to the present invention, a bonnet opening / closing structure that has a simple structure, can be manufactured at a low cost, and can easily perform maintenance work and the like of an apparatus mounted in the bonnet.

  Hereinafter, the case where the present invention is applied to the bonnet 7 of the rolling roller R shown in FIG. 6 will be described. 1 and 2 are a side view and a perspective view of the rear vehicle body 4, respectively. As described above, the rear vehicle body 4 is formed as a casing that constitutes the engine room. As shown in FIG. 2, the rear vehicle body 4 stores pressure oil that serves as hydraulic oil for the engine E and a hydraulic motor (not shown). A tank T, a battery B, an air cleaner F, a radiator RA, and the like are mounted. A bonnet 7 is attached to the upper portion of the rear vehicle body 4 so as to be rotatable around a support shaft 11 (FIG. 1) whose axial direction is the horizontal direction (vehicle width direction). Equipment with high inspection frequency such as engine E and radiator RA is laid out on the side close to the operator when the hood 7 is opened, and the storage tank T, battery B, etc. on the side far from the operator (side near the support shaft 11) A device with a low inspection frequency is laid out. In addition, a gas damper (not shown) is appropriately attached to the bonnet 7 in order to reduce labor when lifting and opening.

  A vehicle body connecting shaft 12 that is parallel to the axial direction of the support shaft 11 (FIG. 1) is provided in the vicinity of the inner upper portion of one side plate 4a in the rear vehicle body 4, and the vehicle body connecting shaft 12 includes a first connecting member. One end side of the member 13 is coupled to be rotatable around the vehicle body coupling shaft 12. A bracket (not shown) is attached to the inside of one side plate 7a of the bonnet 7, and a bonnet connecting shaft 14 parallel to the axial direction of the support shaft 11 (FIG. 1) is provided on this bracket. One end side of the second connecting member 15 is connected to the bonnet connecting shaft 14 so as to be rotatable around the bonnet connecting shaft 14. The other end side of the second connecting member 15 is connected to the other end side of the first connecting member 13 via a link connecting shaft 16 parallel to the axial direction of the support shaft 11 so as to be relatively rotatable.

  FIG. 3 is an exploded perspective view showing the structure around the first connecting member 13 and the second connecting member 15. Both the 1st connection member 13 and the 2nd connection member 15 consist of a flat plate member extended linearly. The other end side of the first connecting member 13 is bent, and a columnar shape that can come into contact with the edge of the second connecting member 15 on the side of the bent portion 13a facing the second connecting member 15. The stopper 17 is formed. Although the action of the stopper 17 will be described in detail later, when the operator opens the bonnet 7 (FIG. 1) to a predetermined position and releases his hand, the link connecting shaft is caused by the weight of the first connecting member 13 and the second connecting member 15. 16 is displaced in one direction, and the stopper 17 comes into contact with the upper edge of the second connecting member 15 so that the open fixing position of the bonnet 7 (FIG. 1) is maintained.

  The main feature of the present invention is that, as shown in FIG. 1, the vehicle body connecting shaft 12 is configured to be linearly movable with the position when the bonnet 7 is closed as a base point position Q1, and the vehicle body connecting shaft 12 is set to a predetermined position. In the process of opening the bonnet 7 in the closed state to the first open fixing position P1, the vehicle body connecting shaft 12 is located at the base position Q1, In the process of further opening the hood 7 from the open fixing position P1, the vehicle body connecting shaft 12 moves linearly and is positioned by the positioning means 18 at the predetermined moving position Q2, so that the bonnet 7 is in the first open fixing position P1. In other words, the second open fixed position P2 having a larger open degree is maintained.

  In the present embodiment, the positioning means 18 is configured to fix the first connecting member 13 to the rear vehicle body 4 via a detachable engaging pin 19. Further, as shown in FIG. 3, a support bracket 20 is provided as a structure around the vehicle body connecting shaft 12. The support bracket 20 is formed with an elongated hole 20a for guiding the linear movement of the vehicle body connecting shaft 12 and an engagement hole 20b with which the engagement pin 19 is engaged. The support bracket 20 is a member fixed to the rear vehicle body 4 (FIG. 1), and is fixed to the side plate 4a side in this embodiment. Specifically, the support bracket 20 is an elongate member having an L-shaped cross section, and an end on one side of the support bracket 20 is fixed to the side plate 4a side by welding or the like along the longitudinal direction of the vehicle. A long hole 20a and an engagement hole 20b shown in FIG. 3 are formed on the side.

  In FIG. 3, the first connecting member 13 has an engagement hole 13 b that engages with the engagement pin 19. Further, a vehicle body connection shaft hole 13c is formed on one end side of the first connection member 13, and the vehicle body connection shaft hole 13c and the long hole 20a of the support bracket 20 are overlapped, and the bolt 21 is inserted. Thus, the nut 22 for preventing the slipping is attached. That is, the bolt 21 is configured as the vehicle body connecting shaft 12 that linearly moves in the long hole 20a. For example, a locking nut is used as the nut 22. For example, after the engaging pin 19 is inserted into the engaging hole 13b and the engaging hole 20b, the retaining pin 19a is inserted into the pin hole 19b. The retaining pin 19a is a known snap pin or the like. The support bracket 20 is formed with an arc-shaped long hole 20c centered on the base point position Q1 (FIG. 1). The engagement pin 19 is also inserted into the long hole 20c.

  As described above, with the structure in which the movement of the vehicle body connecting shaft 12 is guided to the long hole 20a, the engagement pin 19 can be easily inserted into the engagement hole 20b or the long hole 20c. That is, assuming that the vehicle body connecting shaft 12 is not guided in the long hole 20a, when the engaging pin 19 is removed, the first connecting member 13 and the second connecting member 15 are not restrained at all in the vertical direction. When trying to insert the engagement pin 19 again, it is difficult to overlap the engagement hole 13b of the first connecting member 13 with the engagement hole 20b or the long hole 20c, as in this embodiment. In the structure in which the movement of the vehicle body connecting shaft 12 is guided to the long hole 20a, as long as the vehicle body connecting shaft 12 is located at one end of the long hole 20a (base point position Q1, predetermined moving position Q2). The position is a position where the engagement hole 13b of the first connecting member 13 overlaps the engagement hole 20b or the long hole 20c, so that the operator can easily insert the engagement pin 19 without using any nerve. .

  The effect | action of this invention is demonstrated with reference to FIG. 4 and FIG. FIG. 4 is a side action explanatory view showing a process of opening the hood 7 in the closed state to the first open fixing position P1, and FIG. 5 is a side action explanatory view showing a process of further opening the bonnet 7 to the second open fixing position P2. It is.

  4A shows a state where the hood 7 is closed. At this time, the vehicle body connecting shaft 12 is located at one end of the long hole 20a. This position is the base position Q1. The engagement pin 19 is engaged with the engagement hole 13 b of the first connecting member 13 and the long hole 20 c of the support bracket 20.

  In the process of opening the hood 7 by the operator, the bonnet connecting shaft 14 rotates around the support shaft 11 and the link connecting shaft 16 rotates around the vehicle body connecting shaft 12 positioned at the base position Q1, as shown in FIG. Move to rotate. The rotational movement of the engagement pin 19 around the vehicle body connecting shaft 12 is permitted by a long hole 20c formed in an arc shape. When the bonnet 7 is further opened, the first connecting member 13 and the second connecting member 15 are linearly positioned as shown in FIG. This state is “a state where the movement position of the bonnet coupling shaft 14 relative to the vehicle body coupling shaft 12 has reached a limit point”. In the state (c), the stopper 17 has not yet contacted the second connecting member 15.

  When the operator removes his / her hand from the hood 7 in the state (c), the link connecting shaft 16 is moved by the weight of the first connecting member 13 and the second connecting member 15 as shown in FIG. With respect to the line segment connecting the hood and the bonnet connecting shaft 14, it is slightly displaced in one direction (downward in this embodiment), and the stopper 17 contacts the second connecting member 15. Thereby, rotation of the 1st connection member 13 and the 2nd connection member 15 is controlled, and the 1st open fixed position P1 of the bonnet 7 is maintained.

  As shown in FIG. 1, the first open fixing position P <b> 1 is set in a range where an operator standing on the ground can reach around the tip of the hood 7. Routine operations such as the start-up inspection of the engine E are performed in a state where the bonnet 7 is in the first open fixed position P1. When closing the bonnet 7, in FIG. 4, the operator lifts the tip of the bonnet 7 with one hand and maintains the state of (c), and the first connection member 13 or the second connection member 15 with the other hand. The link connecting shaft 16 is slightly displaced in the other direction (upward in this embodiment) with respect to the line segment connecting the vehicle body connecting shaft 12 and the bonnet connecting shaft 14. Thereby, the bonnet 7 is closed through the state of (b).

  It should be noted that the presence or absence of the engagement pin 19 is not questioned in positioning the vehicle body connecting shaft 12 at the base position Q1 in the entire process of FIGS. This is because even if the engagement pin 19 is not provided, the vehicle body connection shaft 12 is pressed against the inner peripheral wall on one end side (the front end side in this embodiment) of the long hole 20a by the weight of the first connection member 13 or the like. Because it can. However, considering the point of smooth opening and closing with little backlash, the engaging pin 19 is connected to the engaging hole 13b of the first connecting member 13 and the arc-shaped long hole 20c of the support bracket 20 as in this embodiment. It is desirable that the vehicle body connecting shaft 12 be positioned at the base point position Q1 by engaging with each other. Further, in the present embodiment, the engagement pin 19 is a member used for positioning at the second open fixing position P2 (FIG. 1), and therefore from the viewpoint of a storage place when the bonnet 7 is closed. It is desirable to engage with the engaging hole 13b of the first connecting member 13 and the arcuate long hole 20c of the support bracket 20 in advance.

  Next, the case where the bonnet 7 is further opened to the second open fixing position P2 will be described. 4B to 4D, after removing the engagement pin 19 engaged with the engagement hole 13b of the first connecting member 13 and the long hole 20c of the support bracket 20. When the bonnet 7 is further lifted from the state shown in FIG. 4 (c), as shown in FIG. 5 (a), as the bonnet connecting shaft 14 rotates, the vehicle body connection at the base position Q1 (FIG. 4) is obtained. The shaft 12 is guided by the long hole 20a so as to be drawn toward the support shaft 11 and linearly moves backward.

  As shown in FIG. 5B, when the vehicle body connecting shaft 12 reaches the other end side (the rear end side in the present embodiment) of the long hole 20a, the operator connects the engaging pin 19 to the first connection. The engagement hole 13b of the member 13 and the engagement hole 20b of the support bracket 20 are engaged. Thereby, the vehicle body connecting shaft 12 is positioned at the predetermined movement position Q2. 5 (a) and 5 (b) is a state where the first connecting member 13 and the second connecting member 15 are positioned linearly, and “the movement position of the bonnet connecting shaft 14 with respect to the vehicle body connecting shaft 12”. Is the state where the limit point has been reached.

  In the state of FIG. 5 (b), the stopper 17 is not in contact with the second connecting member 15, and when the operator releases his hand from the hood 7 in the state of FIG. 5 (b), the stopper 17 is shown in FIG. 5 (c). As described above, the link connecting shaft 16 is unidirectional with respect to the line segment connecting the vehicle body connecting shaft 12 and the bonnet connecting shaft 14 by the weights of the first connecting member 13 and the second connecting member 15 (rearward in this embodiment). The stopper 17 comes into contact with the second connecting member 15. Thereby, rotation of the 1st connection member 13 and the 2nd connection member 15 is controlled, and the 2nd open fixed position P2 of the bonnet 7 is maintained.

  In the present embodiment, in order to increase the opening area, the second open fixing position P2 is basically a range where an operator standing on the ground cannot reach around the tip of the bonnet 7 as can be seen from FIG. It is set to the position where the hand reaches around the tip of the bonnet 7 when the operator is placed on the connecting portion 5 (FIG. 6) or a dedicated stand. Infrequent maintenance work such as oil replenishment of the storage tank T and replacement of the battery B is performed in a state where the bonnet 7 is in the second open fixed position P2.

  When the bonnet 7 is closed, in FIG. 5, the operator removes the engaging pin 19 to release the positioning of the vehicle body connecting shaft 12, and slightly lifts the tip of the bonnet 7 with one hand, as shown in FIG. The link connecting shaft 16 is moved away from the line connecting the vehicle body connecting shaft 12 and the bonnet connecting shaft 14 by pushing the first connecting member 13 or the second connecting member 15 forward with the other hand. It is slightly displaced in the direction (forward direction in this embodiment). As a result, the bonnet 7 is closed through the state of FIG. 5 (a) → FIG. 4 (c) → FIG. 4 (b) → FIG. 4 (a). In the middle of the process of FIG. 4 (c) → FIG. 4 (b) → FIG. 4 (a), the operator inserts the engagement pin 19 into the arc shape of the engagement hole 13 b of the first connecting member 13 and the support bracket 20. It is made to engage with the long hole 20c.

  As described above, one end side rotates around the bonnet connecting shaft 14 provided on the bonnet 7 side and the first connecting member 13 that is rotatably connected around the vehicle body connecting shaft 12 provided on the rear vehicle body 4 side. A second connecting member 15 connected to the other end side of the first connecting member 13 via the link connecting shaft 16 so as to be rotatable relative to the other end side. When either one of the connecting members 15 is provided with a stopper 17 capable of contacting the other connecting member, when the bonnet 7 is opened, the movement position of the bonnet connecting shaft 14 with respect to the vehicle body connecting shaft 12 reaches a limit point. When the hand is released from the bonnet 7, the link connecting shaft 16 is displaced in one direction due to the weight of the first connecting member 13 and the second connecting member 15, and the stopper 17 comes into contact with the other connecting member, thereby causing the first connecting member to move. With the structure in which the rotation of the member 13 and the second connecting member 15 is restricted and the open and fixed position of the bonnet 7 is maintained, the vehicle body connecting shaft 12 is straightened with the position when the bonnet 7 is closed as the base position Q1. In the process of opening the bonnet 7 in the closed state to the first open fixing position P1, it is configured to be movable, and includes a positioning means 18 for positioning and fixing the vehicle body connecting shaft 12 at a predetermined movement position Q2. The vehicle body connecting shaft 12 is located at the base position Q1, and in the process of further opening the bonnet 7 from the first open fixing position P1, the vehicle body connecting shaft 12 moves linearly and is positioned by the positioning means 18 at the predetermined moving position Q2. As a result, the bonnet 7 is maintained at the second opening and fixing position P2 having a larger opening degree than the first opening and fixing position P1. If formed, following effects are achieved.

  (1) By setting the opening and fixing position of the bonnet 7 in two stages, for example, the first opening and fixing position P1 is set within a range in which the hand of an operator standing on the ground reaches the tip of the bonnet 7, 2 open fixing positions P2 can be set within a reachable range, that is, a position having a large opening area. Therefore, for daily work such as start-up inspection of the engine E, the bonnet 7 is set to the first open and fixed position P1, and maintenance work that is infrequent such as oil replenishment of the storage tank T and replacement of the battery B is performed. The bonnet 7 may be moved to the second open fixing position P2. When the battery B is replaced, the bonnet 7 is wide open so that the work is not disturbed. In addition, since the bonnet 7 opens widely, the layout design of the internal device considering the maintenance work is not easily restricted. Since the daily work may be performed at the first opening and fixing position P1 that can be easily reached, the usability of the opening and closing operation of the bonnet 7 is not deteriorated.

  (2) The vehicle body connecting shaft 12 is configured to be linearly movable with the position when the bonnet 7 is closed as a base point position Q1, and includes positioning means 18 for positioning and fixing the vehicle body connecting shaft 12 at a predetermined moving position Q2. With this configuration, the opening and fixing position of the bonnet 7 can be set in two stages with a simple structure, and the manufacturing cost of the opening / closing mechanism can be reduced.

  (3) The member for connecting the bonnet 7 side and the rear vehicle body 4 side is not configured as a single member but is divided into the first connecting member 13 and the second connecting member 15, thereby providing the vehicle body connecting shaft 12. The linear movement stroke can be shortened. Therefore, it is possible to easily cope with a limited space inside the vehicle body. In addition, by providing the stopper 17, the relative rotation between the first connecting member 13 and the second connecting member 15 can be easily regulated.

  Further, as in the present embodiment, if the first connecting member 13 is fixed to the rear vehicle body 4 side as the positioning means 18 via the detachable engaging pin 19, the operability can be improved with a simple structure. The positioning means 18 is excellent.

  A support bracket 20 is provided which is fixed to the rear vehicle body 4 side, has a long hole 20a for guiding the linear movement of the vehicle body connecting shaft 12, and has an engagement hole 20b with which the engagement pin 19 engages. With this configuration, the bonnet 7 can be opened and closed more simply by reducing the number of parts.

  The preferred embodiments of the present invention have been described above. The open and fixed position of the bonnet 7 can be set in three or more stages, and even in this case, any of the two stages satisfying the configuration of the present invention is included in the present invention. Further, the structure of the engagement pin 19 is not limited to that shown in the drawings. The stopper 17 may be provided on the second connecting member 15 side.

It is side surface explanatory drawing of the rear part vehicle body of a rolling roller. It is an external appearance perspective view of the rear vehicle body of a rolling roller. It is a disassembled perspective view which shows the structure around a 1st connection member and a 2nd connection member. It is side action explanatory drawing which shows the process which opens the bonnet in a closed state to the 1st open fixing position. It is side action explanatory drawing which shows the process in which a bonnet is opened to the 2nd open fixing position. It is a side view which shows an example of a rolling roller.

Explanation of symbols

4 Rear body (body)
7 Bonnet 11 Support shaft 12 Car body connecting shaft 13 First connecting member 14 Bonnet connecting shaft 15 Second connecting member 16 Link connecting shaft 17 Stopper 18 Positioning means 19 Engaging pin 20 Support bracket 20a Long hole 20b Engaging hole R Rolling roller (Rolling vehicle)
P1 First open fixed position P2 Second open fixed position Q1 Base point position Q2 Predetermined moving position

Claims (3)

In relation to the opening and closing structure of the bonnet that rotates around the support shaft in a rolling vehicle,
A first connecting member that is rotatably connected at one end side around a vehicle body connecting shaft provided on the vehicle body side, a one end side is rotatably connected around a bonnet connecting shaft provided at the bonnet side, and the other end side is a link connecting shaft And a second connecting member connected to the other end side of the first connecting member via the first connecting member so as to be rotatable relative to the other connecting member, and one of the two connecting members can be brought into contact with the other connecting member. Formed,
When the bonnet is opened, when the movement position of the bonnet connection shaft relative to the vehicle body connection shaft reaches the limit point, when the hand is released from the bonnet, the link connection shaft is displaced in one direction by the weight of both connection members, and the stopper is A bonnet opening and closing structure in which the rotation of both connecting members is restricted by contacting the other connecting member and the open and fixed position of the bonnet is maintained,
The vehicle body connecting shaft is configured to be linearly movable with the position when the bonnet is closed as a base position, and includes a positioning means for positioning and fixing the vehicle body connecting shaft at a predetermined movement position,
In the process of opening the closed bonnet to the first open fixed position, the vehicle body connecting shaft is located at the base position,
In the process of further opening the bonnet from the first open fixed position, the vehicle body connecting shaft moves linearly and is positioned by the positioning means at a predetermined movement position, so that the bonnet is opened from the first open fixed position. A bonnet opening / closing structure in a compaction vehicle, wherein the bonnet is maintained at a second open fixed position having a high degree.   2. The hood opening and closing structure for a compaction vehicle according to claim 1, wherein the positioning means is configured such that the first connecting member is fixed to a vehicle body side via an engagement pin that is detachable.   A support bracket fixed to the vehicle body side and formed with an elongated hole for guiding the linear movement of the vehicle body connecting shaft and having an engagement hole with which the engagement pin is engaged is provided. Item 3. A bonnet opening / closing structure for a compaction vehicle according to Item 2.

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