JP2016089372A - Hood opening and closing mechanism of rolling compaction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hood opening and closing mechanism of a rolling compaction machine capable of downsizing a guide plate with a guide groove by shortening a slide stroke of a slide pin of a stay along with opening and closing of a hood, thereby improving a degree of freedom when apparatuses are installed in a machine room, such as an engine room.SOLUTION: An engine hood 17, which can open and close around a hinge 20 at a rear end, is disposed on an engine room and a base end of the stay 27 is pivotally supported on the left side of the engine hood. A guide plate 22 is fixed on the left side of the engine room. A slide pin 27b on a tip of the stay is engaged in a guide groove 25 of the guide plate so as to slide the guide plate along with opening and closing of the engine hood. The engine hood is kept to open by restricting the sliding of the guide plate by a hook part 25b at the rear end of the guide groove. A front end of the guide groove is positioned on a bisector in an angle area where a pivotally supporting section 27a on the base end of the stay moves around the hinge along with opening and closing of the engine hood.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a hood opening / closing mechanism of a rolling machine, and more particularly to a hood opening / closing mechanism provided in a machine room such as an engine room that opens upward.

  For example, an engine room of a rolling machine is defined so as to open upward, and the opening is closed by an openable / closable hood in order to protect equipment such as an engine mounted therein (for example, Patent Document 1). When performing maintenance of an engine or the like, since it is necessary to hold the hood in an open state, a hood opening / closing mechanism for that purpose is used (for example, see Patent Document 2).

  In the hood opening / closing mechanism described in Patent Document 1, the base end of the stay is pivotally supported on either the left or right side portion of the hood that can be opened and closed by the hinge mechanism, and the slide pin at the tip of the stay is connected to the engine. It fits in the guide groove of the guide plate disposed on the side of the room. As the hood pivots around the hinge mechanism, the guide pin slides the slide pin in the front-rear direction, and at the open position of the hood, the leaf spring restricts the slide pin in the front-rear direction. Holds the hood in the open position.

JP 2000-336609 A JP-A-4-265384

  As described above, the guide plate is disposed on the side portion in the engine room, and the slide pin of the stay slides back and forth in the guide groove of the guide plate as the hood is opened and closed. For this reason, the equipment in the engine room is installed avoiding the sliding stroke area of the guide plate and the slide pin. To increase the degree of freedom when installing equipment around the hood opening / closing mechanism, it is necessary to shorten the sliding stroke of the slide pin. If the sliding stroke is shortened, the length of the guide groove is shortened and the guide groove is shortened. The plate can be downsized.

  However, in the hood opening / closing mechanism of Patent Document 1, since the slide pin slides with a large stroke in the front-rear direction at the side in the engine room, the guide plate is inevitably formed by forming a guide groove corresponding to the stroke. There is a problem that the installation of peripheral equipment is hindered.

  The present invention has been made to solve such problems, and the object of the present invention is to reduce the sliding stroke of the slide pin of the stay accompanying opening and closing of the hood, thereby forming a guide groove. It is an object of the present invention to provide a hood opening / closing mechanism for a rolling compaction machine that can reduce the size of a guide plate and improve the degree of freedom when installing equipment in a machine room such as an engine room.

  In order to achieve the above object, a hood opening / closing mechanism of a rolling machine according to the present invention is connected to a machine room defined so as to open upward in a vehicle body and a side edge of the machine room via a hinge mechanism. A hood that can be rotated between an open position that opens the machine room around the hinge mechanism and a closed position that closes the machine room; And at least one of both side edges sandwiching one side edge of the machine room is formed so as to extend in a substantially horizontal direction, and a slide pin of the stay is fitted, and one end of the hood rotates with the rotation of the hood. A rolling press machine having a guide rail that guides while sliding the slide pin between the other end and restricts sliding of the slide pin reaching the one end at the open position of the hood and holds the hood at the open position In the hood opening and closing mechanism, The other end of the rail is positioned on the bisector of the angular area where the pivot point of the base end of the stay moves around the hinge mechanism when the hood rotates between the open position and the closed position It is characterized by.

According to the hood opening / closing mechanism of the rolling machine of the present invention, the other end of the guide rail is on the bisector of the angular region where the shaft support portion of the base end of the stay moves around the hinge mechanism as the hood opens and closes. Position is set.
For this reason, during the opening and closing of the hood, the slide pin has the other end of the guide rail as a stroke end, and the slide pin slides on the guide rail toward one end regardless of whether the hood is opened or closed from the stroke end. That is, with the stroke end at the other end as the turning point, the slide pin slides in the opposite direction along the common path for both opening and closing of the hood, so that the sliding stroke can be shortened. As a result, the length of the guide rail can be shortened, so that the degree of freedom in installing the devices in the engine room can be improved.

It is a side view which shows the Macadam roller of an embodiment. It is a side view which shows the periphery of an engine hood when it exists in a closed position. It is a front view which shows the periphery of an engine hood when it exists in an open position. It is a side view which shows the periphery of an engine hood when it exists in an open position. It is explanatory drawing which shows the relationship between the movement locus | trajectory of the axial support location of the base end of a stay, and a guide groove. It is a side view which shows the periphery of an engine hood when a slide pin exists in the stroke end of the front side.

Hereinafter, an embodiment in which the present invention is embodied in a hood opening / closing mechanism of a Macadam roller will be described.
FIG. 1 is a side view showing the Macadam roller of this embodiment. In the following description, the front-rear direction and the left-right direction are expressed with reference to the vehicle.

  The body of the Macadam roller 1 (hereinafter also referred to as a vehicle) is composed of a front vehicle body 4 (vehicle body) provided with a front roller wheel 2 and a rear vehicle body 5 provided with a rear roller wheel 3. Yes. The front vehicle body 4 and the rear vehicle body 5 are connected to each other through an articulating mechanism 6, and the front and the center of the articulating mechanism 6 are driven by driving a steering cylinder (not shown) provided in the front vehicle body 4. The vehicle 1 turns as the rear vehicle bodies 4 and 5 bend in the horizontal direction.

  The front rolling wheel 2 is composed of a pair of metal drums and is rotatably supported on the left and right of the front vehicle body 4. The rear rolling wheel 3 is composed of a single metal drum and is rotatably supported by the rear vehicle body 5. The front rolling wheel 2 is driven by a built-in traveling hydraulic motor 7, and the rear rolling wheel 3 is driven by a built-in traveling hydraulic motor 8, whereby the vehicle 1 travels.

  An operation console 11 having a steering 10 is installed on the front vehicle body 4, and a driver's seat 12 is installed on the rear side of the operation console 11 corresponding to the steering 10. Although not shown in the drawing, a pair of left and right steering wheels 10 and a driver's seat 12 are provided so that the operator can easily visually recognize the right and left rolling during the compacting operation. An operator who rides on the Macadam roller 1 and sits on one of the driver's seats 12 operates the steering 10 and the forward / reverse lever 13 of the operation table 11, a brake pedal (not shown) under the foot, etc. Driving and steering are performed.

  A water storage tank 15 for storing water is installed on the rear vehicle body 5. The water storage tank 15 is connected to a pressure roller sprinkling nozzle (not shown) disposed near the front and rear pressure wheels 2 and 3 via a pipe and a water pump. At the time of compaction work, water in the water storage tank 15 is supplied to each watering nozzle by a watering pump in order to prevent the pavement material from adhering to the front and rear pressure wheels 2, 3. , 3 is sprinkled.

  2 is a side view showing the periphery of the engine hood when in the closed position, FIG. 3 is a front view showing the periphery of the engine hood when in the open position, and FIG. 4 is a view showing the periphery of the engine hood when in the open position. FIG.

  As shown in FIGS. 2 and 3, the front vehicle body 4 is composed of left and right side walls 4a and 4b, a rear wall 4c, and a front wall (not shown), and an engine room 18 (machine room) is opened upward in the interior thereof. Is defined. In the engine room 18, an engine 19 (shown in phantom lines in FIG. 3) and devices (not shown) related to the HST using the engine 19 as a power source are mounted.

  An engine hood 17 is disposed on the engine room 18, and the rear end of the engine hood 17 is connected to the front surface (one side edge of the machine room) of the operation table 11 by a pair of hinges 20 (hinge mechanism). . As a result, the engine hood 17 rotates around the hinge 20 between an open position for opening the engine room 18 shown in FIG. 4 and a closed position for closing the engine room 18 shown in FIG. It is supposed to be.

  A guide plate 22 having a substantially triangular shape that is long in the front-rear direction is provided on the left side in the engine room 18 (at least one of both side edges sandwiching one side edge of the machine room). As shown in FIG. 3, the guide plate 22 is disposed on the inner surface of the left side wall 4 a defining the engine room 18, and is fixed to the left side wall 4 a by a pair of front and rear bolts 24 via a spacer 23 at this position. Has been. The guide plate 22 is formed with a guide groove 25 (guide rail) extending in the front-rear direction (substantially horizontal direction) from the rear end (one end) to the front end (other end). An insertion / removal portion 25a bulging upward is formed slightly behind the front end of the guide groove 25, and a latching portion 25b is formed at the rear end of the guide groove 25 so as to bulge downward.

A bracket 26 (shown in FIG. 3) is welded to the left side of the engine hood 17 in the vicinity of the above-described hinge 20, and a base end of a rod-like stay 27 is bent to the left side and rotated. It is pivotally supported (this portion is hereinafter referred to as a pivot support portion 27a). The tip of the stay 27 is bent to the left to form a slide pin 27b. The slide pin 27b is provided with a collar 27c.
In the present embodiment, the snap ring is fitted into the annular groove formed in the slide pin 27b to function as the collar 27c. However, the present invention is not limited to this. For example, the collar 27c may be integrally formed at the tip of the stay 27. Good.

The outer diameter of the flange 27c of the slide pin 27b is set to be slightly larger than the vertical width of the guide groove 25 formed in the guide plate 22 and can be inserted into and removed from the insertion / removal portion 25a including the guide groove 25. Is set to The slide pin 27b is fitted into the insertion / removal portion 25a of the guide groove 25 from the right side, so that the flange 27c together with the slide pin 27b is positioned on the left side of the guide plate 22 through the insertion / removal portion 25a. The slide pin 27b is prevented from detaching from. In this state, the slide pin 27b can slide in the front-rear direction while being guided by the guide groove 25.
In order to separate the stay 27 from the guide plate 22, the tip of the stay 27 is slid to the position of the insertion / removal portion 25 a of the guide groove 25 and then lifted slightly to release the collar 27 c from the insertion / removal portion 25 a. Good.

  Then, as the engine hood 17 is opened and closed, the slide pin 27b of the stay 27 slides in the front and rear direction in the guide groove 25 of the guide plate 22. When the engine hood 17 is in the open position, the slide pin 27b is located behind the guide groove 25. It reaches the end and falls into the latching portion 25b. Therefore, sliding of the slide pin 27b is restricted, the engine hood 17 is held in the open position, and maintenance in the engine room 18 can be performed. In order to open the engine hood 17, the stay 27 may be lifted and the slide pin 27b may be detached upward from the hooking portion 25b.

  By the way, as described in [Problems to be Solved by the Invention], in the hood opening / closing mechanism of Patent Document 1, since the sliding stroke of the slide pin is long, devices installed around the hood opening / closing mechanism, for example, FIG. There is a problem that the degree of freedom of the fuel filter 31, the oil filter 32, the radiator 33, and the like shown in 3 and 4 is limited. The present inventor has found that the cause is that the slide pin is always slid in a direction interlocked with the opening / closing direction of the hood.

Specifically, when the hood in the closed position rotates to the open position, the slide pin slides from the front stroke end to the rear stroke end in the guide groove, and the hood rotates in the opposite direction. Sometimes, the slide pin slides from the rear stroke end to the front stroke end. That is, the displacement of the slide pin created with the opening and closing of the engine hood becomes the sliding stroke as it is, so the slide pin slides with a large stroke in the front-rear direction at the side in the engine room. In addition, the guide plate is enlarged due to the formation of the guide groove corresponding to the stroke.
Therefore, in consideration of this point, in the present embodiment, the relationship between the movement locus of the shaft support portion 27a at the base end of the stay 27 and the guide groove 25 is set as follows to solve the problem.

FIG. 5 is an explanatory view showing the relationship between the movement locus of the shaft support portion 27a at the base end of the stay 27 and the guide groove 25, and FIG. 6 shows the periphery of the engine hood 17 when the slide pin 27b is at the front stroke end. It is a side view.
As described above, the engine hood 17 rotates between the open position and the closed position with the hinge 20 as the center, and at this time, the pivotal support portion 27a at the base end of the stay 27 is centered on the hinge 20, as shown in FIG. Move the arc path. Both ends of the arc path are determined corresponding to the open position and the closed position of the engine hood 17, and the bisector L1 of the angle area centering on the hinge 20 defined by the arc path (a straight line that bisects the angle area). ) Can be specified.

  On the other hand, as indicated by a virtual line L2 in the figure, the optimum height at which the guide groove 25 should be formed on the left side of the engine room 18 has been found in advance, and the bisector L1 is at any point in the front-rear direction. At A crosses the imaginary line L2. This intersection A means a stroke end where the slide pin 27b of the stay 27 slides most forward in the guide groove 25 as the engine hood 17 is opened and closed. As shown in FIG. Is in the middle of opening and closing (middle point between the open position and the closed position).

  In any case where the engine hood 17 is opened or closed from the stroke end, the slide pin 27b slides backward in the guide groove 25. After sliding backward, for example, FIG. When the engine hood 17 shown in FIG. 2 is opened, the engine hood 17 falls into the latching portion 25b, and at the closed position shown in FIG. 2, the engine hood 17 stops at a point before the latching portion 25b. Therefore, the stroke end on the front side of the slide pin 27b is set as the front end of the guide groove 25, and corresponds to the open position of the engine hood 17 (specifically, the position of the pivot support 27a at the base end of the stay 27 in the open position). Thus, the rear end (the latching portion 25b) of the guide groove 25 is naturally determined.

As described above, according to the hood opening / closing mechanism of the embodiment, the position displacement of the slide pin 27b created in accordance with the opening / closing of the engine hood 17 is not directly used as the sliding stroke as in the technique of Patent Document 1, but the front side The slide pin 27b is slid in the reverse direction along a common path when the engine hood 17 is opened or closed with the stroke end as the turning point.
For this reason, the sliding stroke of the slide pin 27b can be shortened to about half, and the length of the guide groove 25 determined based on the sliding stroke of the slide pin 27b as described above can be greatly shortened. Therefore, the guide plate 22 in which the guide groove 25 is formed can be reduced in size, so that the degree of freedom when installing the equipment such as the fuel filter 31, the oil filter 32, and the radiator 33 in the engine room 18 can be improved. .

This is the end of the description of the embodiment, but the aspect of the present invention is not limited to this embodiment. For example, in the above-described embodiment, the engine hood 17 opening / closing mechanism for opening / closing the engine room 18 of the Macadam roller 1 is embodied. However, the present invention is not limited to this, and for example, equipment other than the engine provided in other rolling compaction vehicles. The present invention may be applied to a hood opening / closing mechanism that is intended for a machine room that houses the hood.
Moreover, in the said embodiment, although the guide groove 25 was formed in the guide plate 22 as a guide rail and the sliding of the slide pin 27b of the stay 27 was controlled by the latching | locking part 25b, it is not restricted to this. For example, the guide groove 25 or other guide mechanism may be formed directly on the left side wall 4a of the front vehicle body 4 as a guide rail. Further, instead of the latching portion 25b, sliding of the slide pin 27b may be regulated by a leaf spring as in the technique of Patent Document 1.
Moreover, in the said embodiment, although the hood opening / closing mechanism was provided in the left side wall 4a of the front vehicle body 4, it replaces with this and a hood opening / closing mechanism is provided in the right side wall 4b, or each is provided in the right-and-left both side walls 4a and 4b. Also good.

4 Front car body
17 Engine hood (hood)
18 Engine room (machine room)
20 Hinge (hinge mechanism)
22 Guide plate 25 Guide groove (guide rail)
27 Stay 27a Shaft support 27b Slide pin

Claims (2)

A machine room defined to open upward in the vehicle body;
A hood connected to one side edge of the machine room via a hinge mechanism and rotatable between an open position for opening the machine room and a closed position for closing the machine room with the hinge mechanism as a center;
A stay that is pivotally supported by the hood so that the base end is pivotable and a slide pin is provided at the tip;
A slide pin of the stay is fitted in at least one of both side edges sandwiching one side edge of the machine room, and the stay slide pin is fitted. A rolling guide provided with a guide rail that guides the slide pins while sliding between them and regulates sliding of the slide pins that reach the one end at the open position of the hood and holds the hood at the open position In the hood opening and closing mechanism of the machine,
The other end of the guide rail is on a bisector of an angular region in which the shaft support portion of the base end of the stay moves around the hinge mechanism when the hood is rotated between an open position and a closed position. The hood opening and closing mechanism of the compaction machine, characterized in that the position is set to A guide plate disposed on at least one of both side edges sandwiching one side edge of the machine room;
The hood opening / closing mechanism of the rolling machine according to claim 1, wherein the guide rail is formed as a guide groove in the guide plate, and the slide pin is fitted therein.

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