JP2014234066A - Roof structure of canopy - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof construction of a canopy which suppresses running drop of the water accumulated over a roof from the lateral side of the roof in the working machine provided with the canopy.SOLUTION: In the canopy of a work machine, support posts are erected near the driver's seat, and a roof 21 which covers the driver's seat is attached at the top of the support posts. Recesses 21d are formed on the roof 21 along the front end thereof. On the right and left sides of the recesses 21d, main damming plates 23 extending in a longitudinal direction are erected along the roof lateral edges. An auxiliary damming plates 24 is placed so as to intersect a path toward the roof rear end side further than the rear end of the main damming plates 23 from the recesses 21d at a right-left direction inside position than the roof lateral edges, in order to dam the water which is forced to run down to the roof lateral side from the roof rear end side further than the rear end of the main damming plate 23. The rear end part of the auxiliary damming plate 24 is positioned within the longitudinal length domain of the main damming plate 23.

Description

  The present invention relates to a work machine such as a hydraulic excavator, and more particularly to a canopy roof structure.

  In a working machine such as a hydraulic excavator, there is a model provided with a canopy in which a support is installed in the vicinity of a driver's seat and a canopy (roof) is attached to the upper end of the support to cover the driver's seat. In order to prevent rainwater from dripping to the front side of the canopy when it rains, a canopy of a canopy formed by extending a protrusion step for rainwater weir in the front side on the top side of the canopy in the left and right direction. A canopy structure has been proposed (see, for example, Patent Document 1).

Japanese Utility Model Application Publication No. 3-26614

  However, if the machine body is turned with rainwater collected on the top of the top of the canopy, centrifugal force or inertia force is generated when turning or when turning is stopped, and the accumulated rainwater flows down from the side of the roof. Workers and cabs may get wet.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a canopy roof structure that suppresses the water accumulated on the roof from flowing down from the side of the roof in a working machine equipped with a canopy.

  In order to achieve the above object, the present invention provides a canopy for a work machine in which a support column is installed in the vicinity of a driver's seat and a roof that covers the driver's seat is attached to the upper end of the support column. A dent is formed along one end of the main dam, and a main dam plate extending in the front-rear direction is erected along the roof side edge at least on the entrance side of the left and right sides of the dent. Water that has one end located on one end side of the roof and the other end located on the other end side of the roof, and is about to flow further down from the other end of the roof to the roof side than the other end of the main damming plate. An auxiliary damming plate for damming the dam is provided to cross the path from the recess to the other end of the main damming plate at a position on the inner side in the left-right direction from the roof side edge. Auxiliary damming plate End of the roof at one end has provided a roof structure of the canopy located within the longitudinal length of the main blocking plate.

  Here, the end of the auxiliary damming plate on the other end side of the roof is preferably positioned on the other end side of the roof with respect to the other end of the main damming plate.

  Moreover, it is preferable that the main damming plate and the auxiliary damming plate are provided separately.

  Moreover, it is preferable that a gap is formed between the main damming plate and the auxiliary damming plate when viewed from the front-rear direction.

  Furthermore, it is preferable that the auxiliary damming plate is provided in the vicinity of the recessed portion so that the highest portion thereof has a height equal to or lower than the highest portion of the roof.

  The main damming plates are provided on both the left and right sides of the recess, and the auxiliary damming plates are provided on the left and right sides corresponding to the main damming plates on the left and right sides. A space is formed between the left and right auxiliary damming plates. The end of the auxiliary damming plate on the other end side of the roof is preferably located on the one end side of the roof with respect to the turning center of the machine body on which the canopy is mounted.

  Furthermore, it is preferable that the space between the left and right auxiliary damming plates is wider on one end of the roof than on the other end of the roof.

  According to the canopy roof structure of claim 1, the auxiliary damming plate is further provided on the canopy roof from the recess to the other end of the main damming plate at a position on the inner side in the left-right direction with respect to the roof side edge. It is provided so as to cross the path toward the other end of the roof, and the end of the auxiliary dam plate on the one end side of the roof is located within the longitudinal range of the main dam plate. Therefore, it is possible to prevent the water accumulated in the recess on one end of the roof from flowing down from the other end of the roof further to the side of the roof than the other end of the main damming plate due to the force acting when turning or stopping turning. can do.

  According to the canopy roof structure of the second aspect, the end portion on the other end side of the roof of the auxiliary damming plate is located on the other end side of the roof with respect to the other end of the main damming plate. Therefore, water that is about to flow from the other end of the roof to the side of the roof further than the other end of the main damming plate can be dammed by the auxiliary damming plate.

  According to the canopy roof structure of the third aspect, the main damming plate and the auxiliary damming plate are provided separately. For this reason, it is possible to arrange the main damming plate and the auxiliary damming plate at a position that efficiently suppresses the water from flowing out without increasing the size more than necessary.

  According to the canopy roof structure of the fourth aspect, a gap is formed between the main damming plate and the auxiliary damming plate when viewed from the front-rear direction. For this reason, the water on the side of the roof can flow to the support through the gap between the main damming plate and the auxiliary damming plate.

  According to the canopy roof structure of the fifth aspect, the auxiliary damming plate is provided in the vicinity of the recess so that the highest portion thereof is equal to or lower than the height of the highest portion of the roof. For this reason, the auxiliary damming plate does not affect the overall height of the work machine excluding the attachment.

  According to the canopy roof structure of claim 6, the main damming plates are provided on both the left and right sides of the recess, and the auxiliary damming plates are provided on the left and right corresponding to the main damming plates on the left and right sides. A space is formed between the left and right auxiliary damming plates, and the end of the auxiliary damming plate on the other end side of the roof is located on the one end side of the roof with respect to the turning center of the machine body on which the canopy is mounted. In the vicinity of the side of the turning center, an inertial force acting forward or backward acts depending on the direction of the turning when the turning is stopped. Therefore, when the auxiliary damming plate is not on the side of the turning center but on one end side of the turning center, the effect of blocking water that is about to flow out to the roof side is greater.

  According to the canopy roof structure of the seventh aspect, the space between the left and right auxiliary damming plates is wider on the one end side of the roof than on the other end side of the roof. It is possible to efficiently dam the water toward the end side.

The side view which shows the working machine by embodiment of this invention. The perspective view which shows the machine main body of the working machine of FIG. The top view which shows the roof structure of the canopy by this embodiment. The side view which shows the roof structure of a canopy. The front view which shows the roof structure of a canopy. Sectional drawing which shows the dent part formed in the boundary vicinity of a roof and a rising part. Explanatory drawing which shows the flow of the water on a roof. The top view which shows the roof structure of the canopy by a modification.

  A canopy roof structure of a working machine according to an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 shows a hydraulic excavator 1 (an example of a work machine) to which the present invention is applied. In the hydraulic excavator 1, an upper swing body 3 (machine main body) is rotatably provided on a crawler type lower traveling body 2. The upper swing body 3 is provided with an attachment 5, a machine room 6, a driver's seat 7, a canopy 8, and the like.

  In the following description, when directions such as front and rear, right and left, and up and down are indicated, the description will be made with reference to the excavator 1 in FIG. 1 for convenience. Specifically, the left side of FIG. 1 is the front, the right side of FIG. 1 is the rear, the upper side of FIG. 1 is the upper side, the lower side of FIG. 1 is the lower side, the front side of FIG.

  The attachment 5 includes a boom 5a, an arm 5b, a bucket 5c, and the like. In the case of this model, the attachment 5 is provided at a substantially central portion on the front side of the base 3a in the upper swing body 3 so as to be able to undulate and swing left and right. A counterweight 9 is disposed at the rear of the upper swing body 3 in order to maintain a front-rear balance with the attachment 5.

  As shown in FIG. 2, the machine room 6 is mainly disposed on a portion extending from the right side portion to the rear portion of the base portion 3a. An engine, a hydraulic pump, and the like are accommodated inside the machine room 6.

  The driver's seat 7 on which the operator is seated is disposed in the left portion of the central portion of the upper swing body 3. An entrance 13 (FIG. 2) for an operator to enter and exit the operation space 10 is secured at the front portion on the left side of the upper swing body 3. The upper part of the operation space 10 including the driver's seat 7 is covered with a roof 21 described later.

  The canopy 8 has a basic structure including a roof 21 and a support column that supports the roof 21. The strut is composed of a pair of left and right struts including a right strut 31 and a left strut 32 and is erected on the upper swing body 3. The support columns 31 and 32 are respectively disposed on both sides of the driver's seat 7. Each of the columns 31 and 32 is formed by bending a metal tube in an arch shape.

  Specifically, the right column 31 includes a right column front portion 31A that is positioned right in front of the driver seat 7 and extends in the vertical direction, a right column column rear portion 31B that is positioned right rear of the driver seat 7 and extends in the vertical direction, A right column upper part 31C extending in the front-rear direction is connected to the upper end of the column front part 31A and the upper end of the right column rear part 31B.

  Similarly, the left strut 32 is positioned at the left front of the driver seat 7 and extends in the up-down direction, and the left strut front portion 32A is positioned at the left rear of the driver seat 7 and extends in the up-down direction (see FIG. 4). ), And a left column upper part 32C extending in the front-rear direction and connected to the upper end of the left column front part 32A and the upper end of the left column rear part 32B. Note that the right column upper part 31C and the left column upper part 32C are inclined so as to slightly fall forward.

    The canopy roof structure according to the present embodiment will be described in detail.

  The roof 21 is formed in a rectangular plate shape as a whole. The roof 21 is arranged between the right column upper part 31C and the left column upper part 32C, and is fixed to these. Accordingly, the roof 21 is inclined so as to be lowered forward as a whole.

  At the front end portion of the roof 21, a rising portion 22 </ b> A is provided along the left-right direction for preventing rain water on the roof 21 from flowing down from the front end of the roof and obstructing the operator's view. The raised portion 22A is configured by bending the front end portion of the roof 21 so as to incline forward. Side plate portions 22B are provided at both left and right ends of the raised portion 22A, and the both side plate portions 22B are fixed to the right column upper portion 31C and the left column upper portion 32C, respectively.

  As described above, since the roof 21 is inclined forward and the raised portion 22A is inclined forward, a recessed portion 21d is formed in the vicinity of the boundary between the roof 21 and the raised portion 22A. The recessed portion 21d is a region surrounded by a dotted line in FIG. 3 (see also FIG. 6).

  Main damming plates 23 are provided on the left and right sides of the recess 21d. The left and right main damming plates 23 are erected on the left column upper part 32C and the right column upper part 31C, respectively, and in the vicinity of the left column front part 32A and the right column front part 31A along the roof side edge (that is, the left column upper part). 32C and the left strut front portion 32A, and the right strut upper portion 31C and the right strut front portion 31A).

  As shown in FIG. 3, each main damming plate 23 is bent at a substantially right angle toward the inner side in the left-right direction at the first damming portion 23A extending in the front-rear direction and the rear end of the first damming portion 23A. A second damming portion 23B. That is, each main damming plate 23 is configured in an elongated L shape in plan view.

  Further, an auxiliary damming plate 24 is provided in the vicinity of the recessed portion 21d on the roof 21 to dam water that is about to flow from the rear end side of the roof further to the roof side than the rear end of the main damming plate 23. It has been. Each auxiliary damming plate 24 is fixed on the roof 21 by joining one surface of an L-shaped member to the upper surface of the roof 21.

  The left and right auxiliary damming plates 24 are provided separately from the main damming plate 23, are arranged at an angle of about 45 degrees with respect to the front-rear direction, and spread in a C shape toward the front side. It is a configuration.

  Each auxiliary damming plate 24 is located on the inner side in the left-right direction with respect to the roof side edge, and is provided so as to cross (obstruct) a path from the recess 21d toward the roof rear end side further than the rear end of the main damming plate 23. It has been. Further, each auxiliary damming plate 24 is disposed so as to face the recessed portion 21d.

  More specifically, as shown in FIG. 3, if the positions at which the left and right lengths of the recessed portion 21d are equally divided into P1 to P5 from the left end, the auxiliary damming plate 24 is located at the center of the recessed portion 21d. It is provided so as to cross a path (dotted arrow Y3) from the position P3 toward the roof rear end side further than the rear end of the main damming plate 23. Further, the auxiliary damming plate 24 crosses a path (dotted arrow Y2) from the position P2 which is ¼ from the left end of the recessed portion 21d toward the roof rear end side further than the rear end of the main damming plate 23. Is provided. Note that there is no problem with water near the left end position P1 of the recess 21d because the water is blocked by the main blocking plate 23. The same applies to the positions P4 and P5.

  The position of the auxiliary damming plate 24 will be described further. The front end portion of the auxiliary damming plate 24 is located within the longitudinal range of the main damming plate 23. Further, the rear end portion of the auxiliary damming plate 24 is located on the rear side of the rear end portion of the main damming plate 23 and on the front side of the turning center C of the upper turning body 3.

  As shown in FIG. 3, a gap S <b> 1 is formed between the main damming plate 23 and the auxiliary damming plate 24 when viewed from the front-rear direction. Further, a drain outlet S2 is formed between the main damming plate 23 and the rising portion 22A (side plate portion 22B).

  The auxiliary damming plate 24 is divided into left and right, and a space S <b> 3 is formed between the left and right auxiliary damming plates 24. As described above, since the left and right auxiliary damming plates 24 are opened in a C shape toward the front side, the space S3 is wider on the front side than on the rear side.

  Further, the auxiliary damming plate 24 is provided in the vicinity of the recessed portion 21d, and the highest portion 24H of the auxiliary damming plate 24 is equal to or lower than the height of the highest portion 21H of the roof 21 (FIG. 5). For this reason, the auxiliary damming plate 24 does not affect the overall height of the work machine 1 excluding the attachment 5.

  Next, the flow of water on the roof 21 will be described with reference to FIG.

  In a state where centrifugal force or inertia force is not applied, such as when the upper swing body 3 is not turning, water near the center of the roof 21 flows forward due to the inclination of the roof 21 as indicated by the arrow F2. It collects in the dent part 21d. The water accumulated in the dent portion 21d flows to the drainage port S2 formed between the left and right main damming plates 23 and the side plate portions 22B, and is discharged downward through the left strut front portion 32A and the right strut front portion 31A. Is done. Further, the water near the side edge of the roof 21 is guided to the drain outlet S2 through the gap S1 (FIG. 3) between the main damming plate 23 and the auxiliary damming plate 24 as indicated by an arrow F3. It is discharged downward through the left strut front part 32A and the right strut front part 31A.

  However, since it takes a certain amount of time for the water accumulated in the recess 21d to be discharged through the left strut front part 32A and the right strut front part 31A as described above, the water accumulated in the recess 21d is discharged. The remaining state occurs.

  Then, when the upper swing body 3 starts the swing operation (when the swing starts), when the upper swing body 3 is performing the swing operation (at the time of swing), when the upper swing body 3 that is turning tries to stop the swing operation (turning stop) ), The inertial force (circumferential direction around the turning center C) due to inertia acts on the water on the roof 21 in addition to the centrifugal force (force directed radially outward from the turning center C). . Accordingly, when the upper swing body 3 is turned, for example, a force K indicated by a dotted arrow in FIG. 7 acts on the water accumulated in the recessed portion 21d.

  Therefore, the water accumulated in the recess 21d hits the auxiliary damming plate 24 and is dammed up and down as indicated by the arrow F1. And the water which turned to the rear side of the two arrows F1 returns to the recessed part 21d in the vicinity of the center in the left-right direction as indicated by the arrow F2. Further, the water that has flowed to the front side passes through the drainage port S2 and flows down the left column front part 32a.

  Thus, according to the canopy roof structure according to the present embodiment, the auxiliary damming plate 24 is configured, so that the water accumulated in the recessed portion 21d is caused by the force acting at the time of turning, turning stop, etc. It is possible to suppress the flow down to the roof side through the rear side of the main damming plate 23.

  Further, since the front end portion of the auxiliary damming plate 24 is located within the longitudinal range of the main damming plate 23, the water accumulated in the recess 21 d is between the main damming plate 23 and the auxiliary damming plate 24. It can suppress flowing down to the side of the roof through.

  Further, the rear end portion of the auxiliary damming plate 24 is located on the rear side of the rear end portion of the main damming plate 23. Therefore, the auxiliary dam plate 24 can dam the water that is about to flow down from the rear side of the main dam plate 23 to the roof side.

  Further, since the gap S1 is formed between the main damming plate 23 and the auxiliary damming plate 24 when viewed from the front-rear direction, water near the roof side edge passes through the gap S1 and the columns 31, 32. Can flow into.

  A space S <b> 3 is formed between the left and right auxiliary damming plates 24, and the rear end portion of the auxiliary damming plate 24 is located in front of the turning center C of the upper swing body 3. On the side of the turning center C (mainly on the left side of the turning center C in the present embodiment), an inertial force acting forward or backward acts according to the direction in which the vehicle is turning when turning is stopped. Therefore, since the auxiliary damming plate 24 is not on the side of the turning center C but on the front side of the turning center C, the effect of blocking water that is about to flow out to the roof side is great.

  Further, since the space S3 between the left and right auxiliary damming plates 24 is wider on the front side than on the rear side, the water from the recess 21d toward the rear side of the main damming plate 23 is efficiently dammed. Can be stopped.

  Further, the main damming plate 23 and the auxiliary damming plate 24 are provided not separately but separately. For this reason, it is possible to arrange the main damming plate 23 and the auxiliary damming plate 24 at a position where the water can be efficiently suppressed without being made larger than necessary.

<Modification>
The roof structure of the canopy according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims.

  In the above-described embodiment, the auxiliary damming plate 24 opened in a C shape toward the front side has been described. The configuration of the auxiliary damming plate is not limited to such a shape. For example, as shown in FIG. 8, the left and right auxiliary damming plates 124 may each be configured in an L shape. Even in such a configuration, the gap S13 between the left and right auxiliary damming plates 124 is wider on the front side than on the rear side, and therefore water flowing from the recessed portion 21d toward the rear side of the main damming plate 23. Can be efficiently dammed up.

  In the embodiment described above, the recessed portion 21d is formed in the vicinity of the boundary between the roof 21 and the raised portion 22A as a whole, that is, at the front end portion of the roof. On the other hand, for example, the roof may be inclined rearward and the recess may be formed at the rear end of the roof. Alternatively, the roof may be formed in a gentle arch shape that is highest near the center in the front-rear direction and is inclined forward and rearward, and a recess is formed at the front end or the rear end of the roof. Further, the rising portion does not face obliquely upward as in the above-described embodiment, and may be vertically upward.

  In the above-described embodiment, the main damming plate 23 and the auxiliary damming plate 24 are arranged on the left and right sides of the recess 21d. However, the main damming plate 23 and the auxiliary damming plate 24 may be provided only on the entrance / exit side.

  In the above-described embodiment, the main damming plate 23 and the auxiliary damming plate 24 are provided separately. However, the main damming plate 23 and the auxiliary damming plate 24 may be integrally (continuously) configured.

  Furthermore, in the above-described embodiment, the auxiliary damming plate 24 is divided into left and right parts. However, the auxiliary damming plate 24 may be connected at the center in the left-right direction without being divided into left and right. That is, the auxiliary damming plate 24 may be integrally formed without being divided into left and right.

  In the above-described embodiment, the highest portion 24H of the auxiliary damming plate 24 is equal to or lower than the height of the highest portion 21H of the roof 21. However, depending on the case, the highest portion 24H of the auxiliary damming plate 24 may be at a position exceeding the height of the highest portion 21H of the roof 21.

  As described above, the canopy roof structure according to the present invention is useful as a canopy roof structure provided in a work machine such as a hydraulic excavator.

1 Hydraulic excavator, 2 Lower traveling body, 3 Upper swing body, 5 Attachment,
6 machine room, 7 driver's seat, 8 canopy, 9 counterweight,
10 operation space, 13 entrance / exit, 21 roof, 21d dent,
21H The highest part of the roof, 22A Lifting part, 22B Side plate part,
23 main damming plate, 23A first damming portion, 23B second damming portion,
24 Auxiliary damming plate, 24H The highest part of the auxiliary damming plate,
31 Right strut, 31A Right strut front, 31B Right strut rear,
31C Right strut top, 32 Left strut, 32A Left strut front,
32B Rear left column, 32C Upper left column.

Claims (7)

In the canopy of a work machine where a prop is installed near the driver's seat and a roof covering the driver's seat is attached to the upper end of the prop,
The roof is formed with a recess along one end of the front end or the rear end,
A main dam plate extending in the front-rear direction is erected along the roof side edge at least on the entrance side of the left and right sides of the recess, and the main dam plate is one end located on one end side of the roof. And the other end located on the other end side of the roof,
An auxiliary damming plate for damming water that is about to flow down from the other end of the roof to the roof side further than the other end of the main damming plate is located at the inner side in the left-right direction from the roof side edge. Is provided so as to cross the path from the portion toward the other end of the roof further than the other end of the main damming plate,
The canopy roof structure is characterized in that an end portion of the auxiliary damming plate on one end side of the roof is located within a longitudinal range of the main damming plate.   2. The canopy roof structure according to claim 1, wherein an end of the auxiliary damming plate on the other end side of the roof is positioned on the other end side of the roof with respect to the other end of the main damming plate.   The canopy roof structure according to claim 1 or 2, wherein the main damming plate and the auxiliary damming plate are provided separately.   4. The canopy roof structure according to claim 3, wherein a gap is formed between the main damming plate and the auxiliary damming plate when viewed from the front-rear direction.   5. The auxiliary damming plate is provided in the vicinity of the recess so that the highest portion thereof is equal to or less than the height of the highest portion of the roof. The described canopy roof structure. The main damming plate is provided on both left and right sides of the recessed portion,
The auxiliary damming plates are provided on the left and right corresponding to the main damming plates on the left and right sides,
A space is formed between the left and right auxiliary damming plates,
The end portion on the other end side of the roof of the auxiliary damming plate is located on the one end side of the roof with respect to the turning center of the machine main body on which the canopy is mounted. Canopy roof structure. 7. The canopy roof structure according to claim 6, wherein a space between the left and right auxiliary damming plates is wider on one end of the roof than on the other end of the roof.

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