JP2569848Y2 - Head guard mounting structure for aerial work vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerial work vehicle having a bucket mounted at the end of a boom for a worker, and more particularly, to guard the overhead of a bucket occupant in such an aerial work vehicle. And a head guard mounting structure.

[0002]

2. Description of the Related Art When an aerial work vehicle is mounted on a bucket to perform an aerial work, if there is an obstacle above the bucket, the bucket occupant is required to raise or extend the boom. There is a danger of contact with obstacles.

As shown in FIGS. 8 and 9, a conventional bucket for a worker on an aerial work vehicle may be provided with a head guard 110 for guarding the head of a bucket occupant. The conventional head guard 110 shown in FIGS. 8 and 9 is made of, for example, a metal pipe and has four legs 111, 111.
The overhead guard members 112, 112 are integrally assembled on the upper part of the first. On the other hand, four legs 1 of the head guard 110
Four cylindrical support portions 113, 113,... Into which 11, 11,. The head guard 110 has the legs 111, 111,.
13 can be set to the use position by fitting it into the hole at a predetermined depth, and can be separated from the bucket 103 by removing each leg 111, 111... From the hole of the cylindrical support 113, 113. I am getting sick.

[0004]

However, in the conventional head guard mounting structure shown in FIGS. 8 and 9, when the head guard 110 is mounted on the bucket 103, two workers each have two legs. Hold the portions 111, 111 by hand, and attach the legs to the cylindrical support portions 113, 113,.
Need to be inserted almost simultaneously into the holes, two workers are required for the mounting work, and the positioning work between each leg and the cylindrical support portion is troublesome, and the weight of the entire head guard 110 ( (10 kg or more) must be carried out while being supported manually, which causes a problem that the arm is tired. In a work site where a head guard is not required, work is performed by removing the head guard 110 from the bucket 103 (since the head guard hinders the work if the head guard is attached), Since it has a considerable size, there is a problem that it is difficult to store the removed head guard (a large occupied space for storage is required in a warehouse or the like).
Further, even at the same work site, the head guard 110
There is a case where there is a work requiring the head guard 110 and a case where the head guard 110 is unnecessary. For example, the used head guard 110 is removed from the bucket 103 (placed on the ground) and the next work is performed. When moving the aerial work vehicle, there is also a problem that the head guard 110 may be left behind at the work site and returned.

In view of the above-mentioned problems of the conventional head guard mounting structure, the present invention enables the operation of changing the head guard between the used state and the non-used state to be performed easily and lightly, and furthermore, the head guard is not used. To propose a head guard mounting structure for aerial work vehicles that eliminates the need for a storage place such as a warehouse during use and solves the problem of leaving the head guard at the work site and returning home. It is intended for.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided an aerial vehicle having a boom provided on a vehicle, and a bucket for a worker to be mounted at a tip end of the boom. An overhead guard member capable of guarding the overhead of the bucket worker is provided on the distal end side to form a head guard, and the base end side of the arm member of the head guard is shifted toward the upper part of the bucket and the overhead guard member is positioned above the bucket at a suitable position near the top of the bucket. Pivotally pivotably between a guarded use position and a retracted position stored along the outer surface of the bucket, and furthermore, the headguard is non-pivotally fixed between the bucket and the headguard in the use position. The fixing means is provided.

[0007]

In the head guard mounting structure according to the present invention, the base end of the arm member of the head guard is pivotally mounted at a suitable position near the top of the bucket. And the storage position stored along the outer surface of the bucket, so that the head guard can be displaced between the use position and the storage position by using a proper position of the head guard (for example, an arm). It can be done simply by holding and rotating the member. At this time, since the base end side of the arm member is pivotally fixed at the fixed position, most of the weight of the head guard is supported by the pivoted portion, and the weight burden on the head guard by hand is reduced.

Further, since the head guard can be fixed by the fixing means so as not to be able to pivot at the use position, the head guard is fixed by the fixing means when the swiveling base is turned or the boom is expanded or contracted. In any case, even if the head guard comes into contact with the obstacle from any direction, the head guard does not displace with respect to the bucket.

Further, in the storage position of the head guard, since the overhead guard member is along the outer surface of the bucket, the head guard does not hinder the work of the bucket occupant, and the overhead guard member is moved along the bucket. The bucket outer surface is protected by the overhead guard member.

[0010]

[Effect of the Invention] The head guard mounting structure of the present invention has the following effects.

(1) The base end side of the arm member of the head guard is pivotally mounted at a suitable position above the bucket, and by pivoting the head guard, the use position where the overhead guard member is located above the bucket is determined. Since the head guard can be displaced between the retracted position and the retracted position along the outer surface of the bucket, the operation of operating the head guard to the use position or the retracted position can be easily performed, and the rotation operation of the head guard can be performed by one worker. And can be performed with relatively light work.

(2) In a state where the head guard is fixed by the fixing means at the use position, the head guard is attached to the bucket even when the head guard comes into contact with an obstacle at the time of turning operation of the swivel base or operation of extending and retracting the boom. Since the head guard is not displaced, the stability of the head guard is improved. In particular, if the head guard is fixed at the use position,
When the bucket is moved, for example, even if the head guard contacts an obstacle from the side where the head guard can pivot, the head guard is not displaced, so that the occupant of the bucket can be protected from contact with the obstacle. .

(3) In the retracted state of the head guard, since the overhead guard member is stored along the outer surface of the bucket, even if the head guard is kept mounted on the bucket, the head guard can be held by the bucket occupant. It does not get in the way and therefore does not require a special storage area for storing the head guard.

(4) In the retracted state of the head guard, since the overhead guard member is located along the outer surface of the bucket, the outer surface of the bucket where the overhead guard member is located can be guarded (protected) by the overhead guard member.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 7, a head guard mounting structure for an aerial work vehicle according to an embodiment of the present invention will be described. FIGS. 1 to 3 show a first embodiment of the present invention and FIGS. 7 to 9 show second to fifth embodiments of the present invention, respectively.

The head guard mounting structure of each of the first to fifth embodiments is applied to an aerial work vehicle shown in FIG. FIG.
The aerial work vehicle shown in FIG. 1 is provided with a boom (telescopic boom) 2 that can move up and down on a vehicle 1, and a bucket 3 for boarding an operator is provided at the tip of the boom 2. Bucket 3
In each of the embodiments, a box type is adopted. or,
The bucket 3 has one side surface (the left side surface in FIG. 2) parallel to the boom length direction connected to the boom tip via a bucket support device 4.

The head guard 10 of the first embodiment shown in FIGS. 1 to 3 is integrally formed with an overhead guard member 12, 12 interposed between the distal ends of a pair of front and rear arm members 11, 11. I have.

In the first embodiment, each of the arm members 11, 11 is an elongated plate, as shown in FIGS.
An arm piece 14 having an appropriate length, and a laterally bent piece 15 extending from one end side (tip end) of the arm piece 14 in a direction bent at an angle of about 65 ° to 70 ° with respect to the arm piece 14; A leg 16 extending in a direction bent at an angle of about 90 ° from the distal end side of the laterally bent piece 15 toward the base end side of the arm piece 14 is integrally and continuously formed. Arm 14 is 1000-12
The lateral bending piece 15 has a length substantially equal to the lateral width of the front and rear side walls 31 of the bucket 3 (for example, about 700 to 800 mm), and the leg piece 16 has a length of about 900 to 1000 mm. Have. The arm piece 14 has a length such that the overhead guard members 12, 12 do not contact the lower corner 3a of the bucket 3 when the head guard 10 rotates downward.

In this embodiment, the overhead guard member 12
An elongated plate of books is used. Each overhead guard member 1
2 and 12 are formed to have substantially the same length (for example, about 1500 to 1600 mm) as the width of the bucket 3 in the front-rear direction, and are interposed and fixed between the laterally bent pieces 15 of the both arm members 11. Have been.

Each of the arm members 11, 11 is parallel to each other, so that each of the arm pieces 14, 1 of the both arm members 11, 11 is provided.
The inner surface interval between the four is substantially equal to the outer surface interval of the front and rear side walls 31, 31 of the bucket 3.

The head guard 10 is configured such that the base end sides of the arm members 11, 11 (the base end sides of the arm pieces 14) are located near the upper portions of the front and rear side walls 31, 31 of the bucket 3, respectively, at the outer surfaces at the left and right centers. The head guard 10 is mounted so as to be pivotable up and down with respect to the bucket 3. In addition, the head guard pivot (axis 13)
Are located on the vertical extension line of the horizontal bent piece 15 from the midpoint of the total length of the horizontal bent piece 15 at the use position and the storage position of the head guard. The head guard 10 is pivoted upward as indicated by an arrow A in FIG. 2 so that the overhead guard members 12, 12 can guard the overhead of the bucket occupant (indicated by solid lines) and an arrow B. And pivot it downwards so that the overhead guard member 12,
12 can rotate in an arc within a range of 180 ° with respect to a storage position (position indicated by reference numeral 10 ') stored along the lower surface of the bucket 3. The head guard 10
Are in the use position shown by the solid line and the storage position shown by the dashed line, so that the laterally bent pieces 15, 15 do not protrude outward from the left and right side surfaces of the bucket 3.

When the head guard 10 is in the use position shown by the solid line, the leg 16 of the head guard 10 faces downward and the tip (lower end) of the leg 16 is
The outer surface of the upper edge portion is appropriately overlapped with a small dimension. When the head guard 10 is in the retracted position shown by a chain line, the leg 16 of the head guard 10 is directed upward, and the tip (upper end) of the leg 16 is substantially flush with the upper edge of the bucket 3. It is set to be.

Further, in the head guard mounting structure of this embodiment, fixing means 20 for fixing the head guard 10 at the use position and the storage position are provided. In the fixing means 20 of the first embodiment, a pin hole 21 is provided at the tip end of the leg 16, while a position corresponding to the pin hole 21 of the leg 16 at the head guard use position in each of the front and rear side walls 31, 31 of the bucket. In addition, at the head guard storage position, pin holes 32 and 33 are provided at positions corresponding to the pin holes 21 of the leg pieces 16 respectively.
1 and one of the pin holes (32
Or 33), the head guard 10 can be fixed at the upper use position and the lower storage position, respectively.

In the head guard mounting structure of the first embodiment, if the pin 22 of the fixing means 20 is pulled out, the head guard 10 can be turned up and down about its pivotal portion (the shaft 13). become able to. At this time, since the base end of the head guard 10 is pivotally mounted on the shafts 13, 13, most of the total weight of the head guard 10 is supported by the pivot, and the head guard 10 is supported by the pivot. Rotation operation can be performed by one worker, and the rotation operation can be performed with relatively light work. When the head guard 10 is pinned by the fixing means 20 in a state where the head guard 10 is located at the use position or the storage position, the head guard 10 can be fixed at the use position or the storage position, respectively.

In the state where the head guard 10 is located at the use position (the state shown by the solid lines in FIGS. 1 to 3), the two arm members 1
The upper and lower guard members 12 and 12 guard the upper part of the bucket occupant, respectively, while the upper and lower parts guard the upper and lower parts of the bucket 3. Also, head guard 10
When the bucket 3 is moved and operated while the head guard 10 is fixed at the use position, even if the head guard 10 comes into contact with an obstacle from the pivotable direction of the head guard (left-right direction in FIG. 2), the head guard 10 There is no displacement with respect to the bucket 3, and the safety of the bucket occupant is ensured. In the state where the head guard 10 is located at the storage position (the state shown by the dashed line 10 'in FIGS. 1 to 3), the arm members 11, 11 are respectively moved to the buckets 3 as shown by the dashed lines 11', 11 '. The front and rear side walls 31, 31 are guarded from the outer surface side, and the overhead guard members 12, 12 are dashed lines 12 ', 1
As shown by 2 ', the bottom wall of the bucket 3 is guarded from the lower surface side. Further, in the retracted state of the head guard 10, the arm members 11 'and 11' and the overhead guard member 1
Since the head guards 2 'and 12' are located along the lower surface of the bucket and the outer front and rear surfaces of the bucket, the head guard 10 does not hinder the work of the bucket occupant even when the head guard 10 is in the retracted state. Therefore, when the head guard 10 is not used, a special storage space for storing the head guard is not required. Further, since the head guard 10 is mounted on the bucket 3 even when the head guard 10 is not used, there is no problem of leaving the head guard 10 at the work site and returning.

In the head guard mounting structure of the second embodiment shown in FIG. 4, each arm member 11 (only one is shown) of the head guard 10 is composed of an arm piece 14 and a laterally bent piece 15. . The fixing means 20 for fixing the head guard 10 at the use position and the storage position uses a connecting member 23. The connecting member 23 has its one end 23a pivotally connected to the upper part of each of the front and rear side walls 31 of the bucket 3 near the left and right ends (near the right end in FIG. 4) by means of a shaft 24. It is possible to rotate between the positions. Also, a pin hole 25 is provided at the other end of the connecting member 23.
Are formed. On the other hand, pin holes 26 and 27 are formed at the base end (corner with the arm piece 14) and the tip end of the laterally bent piece 15 of the arm member 11, respectively. These pin holes 26, 2
Reference numeral 7 denotes a pivotal connection between the arm member 11 and the bucket 3 (axis 13).
It is located equidistant from. When the connecting member 23 is raised upward when the head guard 10 is at the upper use position (the position shown by the solid line), the connecting member 23 is formed with the pin hole 25 of the other end 23b of the connecting member and the laterally bent piece. 15 base end side pin holes 2
6, the head guard 10 can be fixed at the use position by inserting the pin 28 into both pin holes 25 and 26, and the head guard 10 can be fixed at the lower storage position (the position indicated by the chain line 10 '). ), When the connecting member 23 is laid down as shown by the chain line 23 ', the pin hole 25 of the other end 23b of the connecting member and the pin hole 27 on the tip end side of the laterally bent piece 15 coincide with each other. By inserting the pins 28 into the two pin holes 25 and 27, the head guard 10 can be fixed at the storage position. The other configuration of the second embodiment is the same as that of the first embodiment.
In the head guard mounting structure of the second embodiment, the first
Functions similarly to those of the embodiment.

The head guard mounting structure of the third embodiment shown in FIG. 5 uses the connecting member 23 of the second embodiment (FIG.
It is attached to the side. That is, in the case of the third embodiment, one end 23b of the connecting member 23 is pivotally connected to the base end of the laterally bent piece 15 by the shaft 24. On the other hand, pin holes 32 and 33 are formed near the left and right ends near the upper part of the front and rear side walls 31 of the bucket 3, respectively. And the connecting member 23
If the connecting member 23 is lowered downward when the head guard 10 is in the upper use position (the position shown by the solid line), the pin hole 25 in the other end portion 23a of the connecting member and the pin hole on the upper right side of the bucket side wall 31 are formed. 33 and both pin holes 25, 3
By inserting the pin 28 into the
Can be fixed in the use position, and the head guard 10 can be fixed.
When the connecting member 23 is raised upward as shown by a dashed line 23 'when is in the lower storage position (the position shown by the dashed line 10'), the pin hole 25 of the other end 23a 'of the connecting material and the bucket side wall are formed. The head guard 10 can be fixed at the retracted position by inserting the pins 28 into the pin holes 32 on the upper left side of the upper part 31 and inserting the pins 28 into the two pin holes 25 and 32.

In the head guard mounting structure of the fourth embodiment shown in FIG. 6, each arm member 11 (only one is shown) of the head guard 10 is formed in a trapezoidal shape. That is, the arm member 11 has arms 14, 14 of appropriate lengths respectively extending to the left and right ends of the base piece 18 having substantially the same width as the width of the front and rear side walls 31 of the bucket 3. 14,14
Are formed with a laterally bent piece 15 interposed between the respective end portions.
The longitudinal center point of the base piece 18 is pivotally connected to the upper center of the front and rear side walls 31 of the bucket 3 with the shaft 13 so that the head guard 10 can rotate up and down. The fixing means 20 for fixing the head guard 10 forms a pin hole 29 at one end (the right end in the illustrated example) of the base piece 18, and has pins near the left and right ends near the upper portion of the bucket side wall 31, respectively. Holes 32 and 33 are formed. And
When the head guard 10 is in the upper use position,
8 and the right side pin hole 33 of the side wall 31 of the bucket coincide with each other, and by inserting the pin 28 into both pin holes 29 and 33, the head guard 10 can be fixed at the use position. When the pin 10 is in the lower storage position (the position indicated by the dashed line 10 '),
The head guard 10 can be fixed in the retracted position by inserting the pins 28 into the pin holes 29 on the upper left side of the bucket side wall 31 and the pin holes 32 on the upper side of the bucket side wall 31.

In the head guard mounting structure of the fifth embodiment shown in FIG. 7, each arm member 11 (only one is shown) of the head guard 10 is an arm piece of the arm member 11 of the first to third embodiments. Using an arm piece 14 slightly longer than the arm piece 14,
A bent piece 19 that extends in a direction bent by an angle of 45 ° is integrally formed at the tip of No. 4. Front and rear arm members 11
Two overhead guard members 12, 12 are interposed between the respective arm pieces 14. The head guard 10 is configured such that the base end side of the arm piece 14 of the arm member 11 is
1 at the position near the upper left end (the bucket supporting device 4 side) by a shaft 13 so that the overhead guard members 12, 12 are located at the upper position, and the overhead guard members 12, 12 are chained lines 12 ', 12 ', the right side wall 3 of the bucket 3
4 can be rotated within a range of 90 ° with respect to the storage position. The fixing means 20 for fixing the head guard 10 uses a connecting member 23, and the connecting member 23
Of the shaft 1 on the front and rear side walls 31 of the bucket 3
3 while being pivotally attached to a position (in the illustrated example, a position closer to the right end) away from the shaft 13 at the same height position as the connecting member 2.
A pin hole 25 is formed at the other end of 3. On the other hand, arm piece 1
A pin hole 30 is also formed in the middle part in the length direction of the pin 4. When the connecting member 23 is tilted upward toward the arm piece 14 when the head guard 10 is at the upper use position (the position shown by the solid line), the pin hole 25 of the connecting member 23 and the pin on the arm piece 14 side are provided. The head guard 10 can be fixed at the use position by inserting the pins 28 into the two pin holes 25 and 30 so that the head guard 10 is in the lower storage position (indicated by a chain line 10 '). When the connecting member 23 is tilted downward as shown by a chain line 23 'at the position (2), the pin hole 25 of the connecting member 23 and the pin hole 30 on the arm piece 14 side are formed.
The head guard 10 can be fixed at the retracted position by inserting the pin 28 into the two pin holes 25 and 30. In the head guard mounting structure of the fifth embodiment, the head guard 10 is set at an angle of 90 degrees.
By rotating the head guard 10 in the range of
Can be displaced between the use position and the storage position. In the fifth embodiment, the head guard 10
, The right side wall 34 of the bucket 3 is guarded by the overhead guard members 12 ', 12'.

[Brief description of the drawings]

FIG. 1 is a side view of an aerial work vehicle equipped with a head guard mounting structure according to a first embodiment of the present invention.

FIG. 2 is an enlarged view taken along the line II-II of FIG.

FIG. 3 is a perspective view of the head guard mounting structure of FIG. 1;

FIG. 4 is a diagram corresponding to FIG. 2 of a head guard mounting structure according to a second embodiment of the present invention.

FIG. 5 is a diagram corresponding to FIG. 2 of a head guard mounting structure according to a third embodiment of the present invention.

FIG. 6 is a diagram corresponding to FIG. 2 of a head guard mounting structure according to a fourth embodiment of the present invention.

FIG. 7 is a diagram corresponding to FIG. 2 of a head guard mounting structure according to a fifth embodiment of the present invention.

FIG. 8 is a side view of an aerial work vehicle equipped with a conventional head guard mounting structure.

FIG. 9 is a perspective view showing the head guard mounting structure of FIG.

[Explanation of symbols]

1 is a vehicle, 2 is a boom, 3 is a bucket, 10 is a head guard, 11 is an arm member, 12 is an overhead guard member, 13 is a shaft (pivot part), and 20 is fixing means.

Claims (1)

(57) [Scope of request for utility model registration] An aerial vehicle in which a boom (2) is provided on a vehicle (1), and a bucket (3) for an operator is provided at the tip of the boom (2). A head guard (10) is provided by providing an overhead guard member (12) capable of guarding the overhead of the bucket worker on the tip side of the arm member (11) having the arm member (11). The proximal end,
The overhead guard member (12) pivots between a use position where the overhead guard member (12) guards above the bucket (3) and a storage position where it is stored along the outer surface of the bucket (3) at a suitable position near the top of the bucket (3). Between the bucket (3) and the head guard (10).
A head guard mounting structure for an aerial work vehicle, comprising: fixing means (20) for fixing the head guard (10) so that it cannot pivot in the use position.