JP3175931B2 - Falling object capture device 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 a fallen object catching device which can be universally or interchangeably retrofitted to buckets of various sizes in an aerial work vehicle.

[0002]

2. Description of the Related Art In general, an aerial work vehicle used for electrical work or communication line work, suspends equipment storage bags such as necessary parts and tools around the bucket, but these are not accessible to workers. There is a danger of falling due to caution or boom recoil, which could lead to personal injury or traffic obstacles. Therefore, as a safety measure, the two applicants proposed Japanese Patent Application Laid-Open No. Hei 10-280988, Was able to achieve the results.

[0003]

However, as a result of intensive studies, it has been found that the above-mentioned known invention still has the following problems to be improved.

That is, according to the configuration of the above-mentioned known invention, the net supporting frame (F) is composed of the vertical pipe (31) and the horizontal pipe (32), the inclined pipe (33), and the operating rope (3).
4) a lashing belt (13) and a belt fixing bracket (A) for fixing the vertical pipe holder (25) of the net support frame (F) to the bucket (B);
Lock pin (P) for connecting and fixing the top cover (36) of the vertical pipe (31) and the hanger hook (42), a cover fork (53), an inclined pipe holder (58), a receiving clip (63) and the like. Requires
Since the number of assembled parts is very large, the manufacturing cost becomes considerably high.

[0005] Further, when attaching to the bucket (B) of the aerial work vehicle (V), the vertical pipe holder (25) is inserted into the lashing belt (13) and the lashing belt (13) is tensioned. The top cover (36) and the hanger hook (4) by the lock pin (P)
2) connection and fixing, assembling of the net support frame (F),
The nets (N1), (N2), and (N3) for catching falling objects must be attached to the net support frame (F) in order, and the work is extremely complicated.
It is not possible for one person to perform quick and accurate mounting work.

In addition, when the bucket (B) of the aerial work vehicle (V) is moved from the ground to a higher position, the above-mentioned mounting operation can no longer be performed from the bucket (B). With the bucket (B) on the ground,
It is necessary to carry out the work of attaching to the bucket (B) and the work of hanging the falling object catching nets (N1), (N2) and (N3).

Further, in the above-mentioned known invention, the net supporting frame (F) on which the falling object catching nets (N1), (N2) and (N3) are attached can be kept in a folded state as shown in FIG. However, since these are exposed around the bucket (B) even if they are provisionally folded, communication is required when the aerial work vehicle (V) moves toward the construction site or when the telescopic boom (10) turns. It becomes an obstacle that easily interferes with the line and other objects, resulting in poor safety.

[0008]

SUMMARY OF THE INVENTION The present invention intends to further improve such a problem, and as a fallen object catching device for an aerial work vehicle useful for this purpose, a telescopic boom of an aerial work vehicle is provided. A hanger hook that is detachably engaged and fixed to the opening edge of the bucket as a substantially inverted U-shaped or J-shaped side view that straddles the opening edge of the equipped bucket,

An arm holder fitted with the hanger hook itself as a slide guide rail so as to be able to slide in and out of the bucket;

A support arm for hanging a falling object catching net, which is pivotally attached to the arm holder so as to be able to undulate around a horizontal axis,

When the arm holder is slid to the outside of the bucket along the hanger hook, the support arm that projects from the bucket is
While being received from below by the arm holder, it is maintained at a fixed angle of rising and inclined installation state,

[0012] Similarly, when the arm holder is slid into the bucket along the hanger hook when not in use, the support arm is set to hang down from the arm holder into the bucket by itself. It is.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an aerial work vehicle (V) used for electric work and communication line work, etc. An operator stands on the bucket (B) provided at the tip of the telescopic boom (10) and performs necessary work.

The above-mentioned bucket (B) is a well-known product made of fiber reinforced plastic (FRP) or other electrically insulating material. The front and back (11a) (11b) and the left and right sides (11
c) It is formed in a substantially rectangular shape in plan view having (11d) and a bottom surface (11e), and a reinforcing flange (12) is continuously projected from the opening edge thereof, and the above-mentioned structure is formed on the back surface (11b). It is a common practice that the telescopic boom (10) is pivotally connected to the distal end of the telescopic boom (10) so as to be pivotable.

The fallen object catching device of the present invention can be universally or interchangeably retrofitted to buckets (B) of various sizes, and all of its components are made of an electrically insulating material. While being attached to (B), it is easy to store it in the bucket (B), change the attachment position to the bucket (B), and remove and store it from the bucket (B). You can do it.

That is, in FIGS. 1 to 20 showing the attached state of the fallen object catching device according to the present invention and the components thereof,
(H) is a hanger hook bent from a fiber reinforced plastic (FRP) or an ABS resin into a substantially inverted U-shape or J-shape in a side view that straddles the opening edge of the bucket (B). It has an E-shaped cross section or a rail type that can function as a slide guide rail of an arm holder described later.

The hanger hook (H), which is bent into a substantially inverted U-shape or J-shape when viewed from the side, has a narrow (W1) protruding corner edge (13) and a wide (W2) protruding corner edge (14). Are cut out as a pair of left and right slide guide concave grooves (15) that open sideways as shown in FIGS. 10 to 12 to form a cross-section E-shaped or rail-shaped.

(16), (17) and (18) are scattered distributions on the groove bottom surfaces of both the slide guide concave grooves (15) and on the left and right side surfaces of the above-mentioned outer corner (13) and the inner corner (14). A large number of recesses for preventing distortion given to the state absorb not only the deformation of deformation that tends to occur when the hanger hook (H) is formed, but also contribute to the weight reduction of the hanger hook (H).

The hanger hook (H) is substantially U-shaped or J-shaped in a side view, straddling the opening edge of the bucket (B).
Since it is bent in the shape of a letter, the bucket (B)
The upper end of the hanger hook (H) is attached to the bucket (B) as shown in FIGS. The positional relationship is such that the other end of the lower portion faces the inside of the bucket (B) outwardly.

(19) and (20) detent stoppers provided at one lower end and the other lower end of the hanger hook (H), respectively.
By closing the corresponding lower end and lower end of 5), the slide piece of the arm holder described later is prevented from coming off.

In this case, the stopper (2) at the lower end of the lower end which faces the inside of the bucket (B) in the illustrated example.
Is separately formed from the same synthetic resin as the hanger hook (H), and is detachably attached and fixed to the hanger hook (H) with a polycarbonate resin screw (21) or the like. It may be formed integrally with (H).

On the other hand, the stopper (19) at the lower end, which faces the outside of the bucket (B), is formed integrally with the hanger hook (H) as a particularly rigid block type. Moreover, here, a horizontal screw hole (2) orthogonal to the opening direction of the slide guide groove (15) is provided.
2) is engraved in a penetrating state.

Reference numeral 23 denotes a screw rod for fixing the hanger hook, which is screwed into the screw hole 22 so as to be able to advance and retreat from the outside, and is made of polycarbonate resin. Rotary operation knob (24)
And a pressure seat (25) having a large diameter at the tip end.

In other words, when the screw rod (23) is screwed from the outside toward the bucket (B), the bucket (B) is shifted from the bucket (B) in the hanger hook (H) as shown in FIG. The lower end, which faces inward, is pressed by the pressing seat (25) of the screw rod (23), and the hanger hook (H) is pressed against the bucket (B).
Are locked and fixed in a stretched state.

Conversely, the screw rod (23) is screwed outward to release the hanger hook (H) from the bucket (B) and release the hanger hook (H). It goes without saying that the bucket (B) can be pulled out upward from the opening edge. In that sense, the buckets (B) of various sizes can be conveniently and retrofitably used universally or interchangeably. (26) is the above screw rod (23)
Of the lock nut, from now on the rotation operation lever (2
It is desirable to overhang 7).

(A) is an arm holder fitted with the above-mentioned hanger hook (H) as a slide guide rail so as to be slidable inward and outward of the bucket (B). Figures 13-1
8 and a pair of left and right side plates (28) and a partition reinforcing plate (29) therein are integrally formed in a substantially H-shape.

In this case, the constant width (W3) of the arm holder (A) is set to be approximately the same as that of the corner (14) of the above-mentioned hanger hook (H). The base end also surrounds a particularly narrow width (W1) protruding corner edge (13) of the hanger hook (H) and both of the slide guide grooves (15).

Numeral (30) is a pair of left and right slide pieces projecting inward from the base ends of the two-sided fork-shaped side plates (28) of the arm holder (A). ) Is fitted with the slide guide groove (15). Therefore, the arm holder (A) can slide inward and outward of the bucket (B) via the slide piece (30).

In this regard, in the illustrated example, a pair of left and right slide pieces (30) are separately formed from the same synthetic resin as the arm holder (A), and a plurality of polycarbonates are attached to both side plates (28) of the arm holder (A). Resin screw (31)
Is attached and fixed detachably through the slide guide groove (15) of the hanger hook (H).
If the slide pieces (30) can be inserted from the other end of the lower part, even if both slide pieces (30) protrude inward and integrally from both side plates (28) of the arm holder (A), they can be used.

In any case, both slide pieces (30)
5 and 6, the surface (floor surface) of the hanger hook (H) that contacts the corner (14) of the hanger hook (H) that defines the slide guide groove (15) has a smooth surface (figure 5). In 30a), it is preferable that the surface (ceiling surface) that is also in contact with the protruding corner edge (13) of the hanger hook (H) is formed as a convex curved surface (30b). Then, both slide pieces (30) slide more and more smoothly in the slide guide grooves (15) of the hanger hook (H) bent in an inverted U-shape or J-shape in side view. Because you will get it.

The front end of the arm holder (A) from the partition reinforcing plate (29) has a substantially U-shape including a forked or bottom plate (32) facing both side plates (28). The base end portion of the support arm (P) for hanging the falling object catching net into the inside can be received and clamped.

The support arm (P) for hanging the fallen object catching net is configured to be extendable and retractable, and when the length thereof is shortened, the support arm (P) is stored in the bucket (B) without any trouble. Is available.

That is, the support arm (P) is made of a glass fiber (GFRP) thick basic pipe (33) having a fixed length (L) that fits inside the bucket (B),
The same or shorter glass fiber thin extension pipe (34) and its thick base pipe (3
3) and a cover base (35) made of ABS resin, which is inserted into the base end of (3) and integrated therewith.
3) and the extension pipe (34) are adjacent to each other as shown in FIG.
They are connected in a slide-fitted state such as 9 and 20, which can be extended and contracted.

In both figures, (36) is a male screw carved at the tip of a thick basic pipe (33), and (37) is a split piece attached to the base end of a thin extension pipe (34). ,
Numeral (38) is a cap nut screwed and fastened to the male screw (36) so as to surround the split piece (37). When the nut is turned in the tightening direction, the split piece (37) is rotated.
Can be contracted and deformed to fix the inserted connection state between the extension pipe (34) and the basic pipe (33), and if the cap nut (38) is turned in the reverse direction to loosen the cap nut (38), the split piece (37) ) Is restored and expanded so that the two pipes (33) and (34) can be expanded and contracted.

However, the structure for making the support arm (P) extendable and contractible is not limited to those shown in FIGS. 19 and 20, and other appropriate structures can be selected. or,
When the size of the bucket (B) is relatively large, it may be possible to employ a single non-stretchable support arm (P) from which the extension pipe (34) is omitted.

Then, a cover base (35) forming the base end of such a support arm (P) extends horizontally through both side plates (28) of the arm holder (A). 39), the arm holder (A) is pivotally connected to the tip of the arm holder (A) so as to be undulating and rotatable.

For this reason, a hanger hook (see FIG. 4) which is substantially inverted U-shaped or J-shaped as viewed from the side and straddles the opening edge of the bucket (B) and is fixedly attached to the opening edge of the bucket (B). When the arm holder (A) is slid out of the bucket (B) along H), the support arm (P) projects outward from the bucket (B) as shown in FIGS. State.

In this case, the arm holder (A) is also provided with a support arm receiving stopper (40) which crosses the both side plates (28) at the tip end, so that the support arm (P) can be moved from below. The support arm (P) is stably received and can be maintained in a state where the support arm (P) in use is inclined upward at a constant angle (α) as shown in FIGS.

On the other hand, when the arm holder (A) is slid inward of the bucket (B) along the hanger hook (H), the arm holder (A) is moved as shown in FIG.
8, the support arm (P) hangs down into the bucket (B) by itself.

As a result, by shortening the length of the support arm (P) prior to the inward sliding operation, the support arm (P) is kept in an unused state accommodated in the bucket (B). In a state where the bucket (B) is not exposed at all, the movement of the aerial work vehicle (V) toward the construction site or the turning of the telescopic boom (10) can be performed without danger of interfering with other objects. I can do it.

FIGS. 2 and 3 show plan views of the bucket (B).
This shows the use state in which the support arm (P) projects outward from the outside. In order to secure a space for lifting and lowering equipment storage bags for parts and tools necessary for construction, the total amount of the fallen object catching device according to the present invention is shown. Four sets are the front (11a) of the bucket (B)
And one of the left and right sides (11c).

(N1) is the front (1) of the bucket (B).
1a) A first rectangular net for catching a falling object, which is attached to both support arms (P) so as to shield an adjacent plane space between the support arms (P) projecting outward from (1a), (N2) Is also one side of the bucket (B) (11
(N3) A second rectangular net for catching a falling object, which is attached to both support arms (P) so as to shield an adjacent mutual plane space between the support arms (P) projecting outward from c). Shields the corner plane space adjacent to the support arm (P) projecting outward from the front surface (11a) of the bucket (B) and the support arm (P) projecting outward from the one side surface (11c). Thus, a triangular net for catching a falling object attached to both support arms (P), each of which is made of synthetic fiber such as polyester or nylon.

In this state, the edges of the first and second quadrangular nets (N1) and (N2) and the triangular net (N3) are fixed and maintained to the support arm (P) by means such as binding or penetrating. Good.

In this regard, in the illustrated example, the first and second square nets (N1) are provided in order to facilitate the work of attaching to the support arm (P) and to facilitate the undulating rotation.
(N2) and a triangular net (N3) are prepared and prepared separately, and a hook and a binding string (not shown) are provided between adjacent ones.
Although it is connected and integrated by such means, it is acceptable to adopt a single continuous net as a whole.

Particularly, the first and second square nets (N1)
(N2) is prepared and prepared as substantially the same area that can also be used for each other, and next to the hanger hook (H) which is locked and fixed as a pair to each of the front surface (11a) and one side surface (11c) of the bucket (B). Matching mutual spacing (D1) (D
2) is positioned at approximately the same size, and the front (11) is positioned.
a) and the first and second square nets (N1) (N) are respectively attached to the support arms (P) projecting outward from one side surface (11c).
If 2) is used, the fallen object catching device of the present invention should be interchangeably and conveniently transferred to the other side (11d) as shown by the chain line in FIG. 2 according to the situation at the construction site. This has the effect of maintaining the symmetrical use state.

The cover base (35), which is inserted into and integrated with the base end of the support arm (P),
As an elbow tube form that refracts in a substantially elliptical shape in plan view such as 8, 18, a longitudinal center line (Y) of the support arm (P) is provided.
-Y) is preferably directed so as to intersect with the fixed angle (β).

Then, when a total of four sets of the fallen object catching device according to the present invention are attached to the substantially rectangular bucket (B) in plan view in the arrangement state as shown in FIGS. Each pair of support arms (P) projecting outward from the front surface (11a) and the one side surface (11c) of the bucket (B) is kept in a pair of two in a plan view. And the front (1) of the bucket (B)
The fallen object catching area by the nets (N1), (N2), and (N3) at 1a), the one side surface (11c) and the corners is set to a large area by a fixed angle (β) of the cover base (35). This effect can be attained in the same manner even when relocated to the other side (11d).

However, the cover base (35) is formed as a straight straight pipe in plan view extending along the longitudinal center line (YY) of the support arm (P), and the front face of the bucket (B) is formed. (11a) and two pairs of support arms (P) that protrude outward from one side surface (11c) may be kept adjacent to each other in a parallel state.

When attaching the fallen object catching device of the present invention to the bucket (B) of the aerial work vehicle (V), FIGS.
Of the bucket (B) like the front (11a) and one side (1
Assuming that a total of two surfaces 1c) are selected for use in the construction, first, a total of four hanger hooks (H) are attached to the opening edges of the total two surfaces from above as shown in FIGS. Each of them is locked in a straddling state, and the screw rod (2
By the screwing operation of 3), the entire position is fixed to the bucket (B).

Next, the arm holder (A) attached to each of the hanger hooks (H) is slid inward of the bucket (B), and the support arm () which hangs inside the bucket (B). P), the first and second square nets (N1) and (N2) for catching falling objects and the triangular net (N
Stick 3).

The work of attaching and fixing each hanger hook (H) to the bucket (B), the sliding operation of the arm holder (A) using each hanger hook (H) as a slide guide rail, and the above-mentioned support arm The work for hanging the net on (P) is the bucket (B)
Can be performed safely, quickly, and simply by one of the workers standing on the vehicle.

When electric work or communication line work is performed on site, each arm holder (A) is placed along the hanger hook (H) from above the bucket (B) as shown by a chain line in FIG. The sliding operation to the outside of the bucket (B) is performed, and in the process, each supporting arm (P) is extended and extended, so that each supporting arm (P) is moved to the bucket (B) as shown in FIGS. ) To the outside, and furthermore, the first and second quadrangular nets (N1) (N2) and the triangular net which are developed along with the first and second quadrangular nets (N1) and the triangular nets are kept at a fixed angle (α) in a state of rising and tilting. By (N3), a fallen object can be reliably captured.

When the aerial work vehicle (V) is moving toward the construction site, when the telescopic boom (10) is telescopically operated or turned, the support arm (P) is shortened. The arm holder (A) is slid inward of the bucket (B), so that the support arm (P) falls down into the bucket (B) by itself as shown in FIGS. 1, 2 square net (N1) (N
2) and the triangular net (N3) are also stored inside the bucket (B).

Since these are not exposed at all around the bucket (B), there is no risk of becoming an obstacle, and the aerial work vehicle (V) moves toward the construction site and the telescopic boom (1).
The turning of 0) can be performed safely.

[0055]

As described above, the fallen object capturing device for an aerial work vehicle according to the present invention provides an opening edge of a bucket (B) mounted on a telescopic boom (10) of an aerial work vehicle (V). A hanger hook (H), which is substantially inverted U-shaped or J-shaped when viewed from the side and straddles and is fixed to the opening edge of the bucket (B) so as to be freely detachable;

An arm holder (A) fitted with the hanger hook (H) itself as a slide guide rail so as to be able to slide in and out of the bucket (B).

And a support arm (P) for hanging a falling object catching net, which is pivotally attached to the arm holder (A) so as to be able to move up and down around a horizontal axis.

When the arm holder (A) is slid out of the bucket (B) along the hanger hook (H), the support arm (P) projecting from the bucket (B) is used. Is received from below by the arm holder (A) and has a fixed angle (α).
While it is kept in a state of rising slope

Similarly, when the arm holder (A) is not operated by sliding the arm holder (A) along the hanger hook (H) into the bucket (B), the support arm (P) is moved from the arm holder (A) to the bucket (B). ) Is set so as to hang down by itself, so that the problems of the prior art described at the beginning can be completely improved.

That is, according to the above configuration of the present invention, the fallen object catching device merely comprises the hanger hook (H), the arm holder (A) and the support arm (P), and the number of assembly parts is very small. Simplification,
Mass production effects can be maximized.

Further, when attaching to the bucket (B) of the aerial work vehicle (V), it is sufficient to lock and fix the bucket (B) so as to straddle the hanger hook (H) to the opening edge of the bucket (B). Not only the mounting operation, but also the sliding operation of the arm holder (A) along the hanger hook (H),
The work of attaching the net to the support arm (P) can be easily performed by one of the workers standing on the bucket (B), and therefore, the workability is remarkably excellent.

In particular, the hanger hook (H) is substantially inverted U-shaped or J-shaped in a side view straddling the opening edge of the bucket (B), and is freely detachable from the opening edge of the bucket (B). The hanger hook (H) itself is used as a slide guide rail.
Along with this, the arm holder (A) is fitted so as to be slidable in and out of the bucket (B), so that the falling object catching net supporting arm (P) is further attached to the arm holder (A). ) Is pivotally mounted about a horizontal axis so that the arm holder (A) can be slid from above the bucket (B).
The use state and the non-use state of the support arm (P) can be conveniently converted.

When the arm holder (A) is slid inward of the bucket (B) along the hanger hook (H), the arm holder (A) is turned upside down, and the supporting arm ( P) hangs down into the bucket (B) by itself, and the fallen object catching nets (N1), (N2), and (N3) attached to the bucket (B).
Are stored in the bucket (B), so that when the aerial work vehicle (V) moves toward the construction site, or when the telescopic boom (10) turns, etc. There is no risk of becoming an obstacle that interferes with other objects.

If the structure of claim 2 is adopted, the fallen object catching net attaching support arm (P) is stably and firmly maintained at a fixed angle (α) with a rising slope, so that the fallen object is removed. It can be captured more and more reliably and helps to improve its safety.

If the configuration of claim 3 is adopted, the fallen object catching device of the present invention can be used without restriction even for a relatively small bucket (B), and its versatility or Not only does the compatibility increase, but the supporting arm (P) is shortened from above the bucket (B), so that the supporting arm (P) and the falling object catching nets (N1) (N2) (N3) are bucketed. There is also an effect that it can be kept in an unused state, which is stored without any trouble inside (B).

If the configuration of claim 4 is adopted, the hanger hook (H) itself can be integrally formed as a reasonable slide guide rail, and the slide guide of the hanger hook (H) can be integrally formed. Groove (15)
And the male / female fitting of the arm holder (A) with the slide piece (30) can keep the arm holder (A) in a stable assembled state with the hanger hook (H).

In particular, if the configuration of claim 5 is adopted,
The high rigidity stopper stopper (19) of the slide piece (30) is also used, and the screw rod (23) for fixing the hanger hook tension can be stably screwed to the slide piece (30). It can be said that

If the structure of claim 6 is adopted, the slide piece (30) of the arm holder (A) is inserted into the slide guide groove (15) of the hanger hook (H) even from the middle thereof and fitted. In addition to this, there is an effect that the sliding action of the slide piece (30) along the slide guide groove (15) can be performed more smoothly.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a high-altitude working state by using the present invention.

FIG. 2 is a plan view showing an attachment state of the present invention to a bucket of an aerial work vehicle.

FIG. 3 is a plan view showing a state where a fallen object catching net is attached to FIG. 2;

FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 2;

FIG. 5 is an enlarged view showing a part of FIG.

FIG. 6 is a sectional view taken along line 6-6 in FIG. 5;

7 is a cross-sectional view corresponding to FIG. 4 in a state where the present invention is housed in a bucket of an aerial work vehicle.

FIG. 8 is a rear view of FIG. 7;

FIG. 9 is a plan view of FIG. 7;

FIG. 10 is a side view showing a hanger hook extracted.

FIG. 11 is a rear view of FIG. 10;

FIG. 12 is a sectional view taken along line 12-12 of FIG. 10;

FIG. 13 is a plan view showing an extracted arm holder.

FIG. 14 is a side view of FIG.

FIG. 15 is a front view of FIG.

FIG. 16 is a sectional view taken along line 16-16 of FIG. 13;

FIG. 17 is a sectional view taken along line 17-17 of FIG. 13;

FIG. 18 is a sectional view taken along line 18-18 of FIG. 17;

FIG. 19 is a partially cutaway side view showing extracted and expanded portions of the support arm for hanging the net.

FIG. 20 is a sectional view taken along line 20-20 of FIG. 19;

[Explanation of symbols]

(10)-Telescopic boom (13)-Outer corner (12)-Reinforcement flange (14)-Inner edge (15)-Sliding guide groove (19) (20)-Slide piece stopper (23)・ Screw rod for hanger hook tension fixing (25) ・ Press seat (26) ・ Lock nut (30) ・ Slide piece (30a) ・ Smooth surface (30b) ・ Convex curved surface (33) ・ Basic pipe (34) ・ Extension pipe (35) · Cover base (39) · Support pin (40) · Stopper stopper (A) · Arm holder (B) · Bucket (H) · Hanger hook (N1) · First square net (N2) · Second square Net (N3), Triangle net (P), Support arm for hanging the net (V), Aerial work vehicle (L), Basic pipe length (α), Constant angle (β), Constant angle

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-154964 (JP, A) JP-A-9-310504 (JP, A) JP-A-10-6275 (JP, A) JP-A-10- 280698 (JP, A) Japanese Utility Model Hei 7-6398 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H02G 1/02 E04G 21/32

Claims (6)

(57) [Claims] 1. A bucket (B) mounted on a telescopic boom (10) of an aerial work vehicle (V) and having a substantially inverted U-shape or J-shape in a side view that straddles an opening edge of the bucket (B). ) And a hanger hook (H) that is removably locked and fixed to the opening edge of the bucket, and the hanger hook (H) itself can be used as a slide guide rail to slide the bucket (B) inward and outward. An arm holder (A) fitted as described above, and a support arm (P) for hanging a falling object catching net, which is pivotally attached to the arm holder (A) so as to be able to undulate around a horizontal axis. When the device (A) is used by sliding the bucket (B) out of the bucket (B) along the hanger hook (H), the support arm (P) projecting from the bucket (B) is attached to the arm holder (A). The arm holder (A) was received from below and maintained in a state of rising at a certain angle (α) while the arm holder (A) was also slid inward of the bucket (B) along the hanger hook (H). A fallen object catching device for an aerial work vehicle, wherein the supporting arm (P) is set so as to hang down from the arm holder (A) into the bucket (B) when not in use. 2. A base end of the support arm (P) inserted into the arm holder (A), which is formed as a fork-shaped fork capable of holding the support arm (P) for hanging a falling object net on the tip end of the arm holder (A). A stopper (40) for pivotally connecting the part by a horizontal fulcrum pin (39) so as to be undulating and rotatable, and keeping the support arm (P) in a state of being inclined upward at a constant angle (α) during use. To
The fallen object catching device for an aerial work vehicle according to claim 1, wherein the fallen object is traversed inside the forked arm holder (A). 3. A large basic pipe (33) having a length (L) for accommodating a support arm (P) for hanging a fallen object catching net in a bucket (B), and having a length equal to or shorter than this. The fallen object catching device for an aerial work vehicle according to claim 1, wherein the fallen object catching device is connected to a thin extension pipe (34) so as to be extendable and contractible. 4. A cross section of a slide guide groove (15), which is opened laterally, is cut out between a protruding corner edge (13) and an entering corner edge (14) of a hanger hook (H). From the base end of the arm holder (A) surrounding the hanger hook (H) as a U-shaped or rail-shaped
A pair of left and right slide pieces (30) that fit into the hanger hook (H) are projected inward, and one end of a lower portion of the hanger hook (H) that faces outward from the bucket (B), and the bucket (B).
2. A stopper for an aerial work vehicle according to claim 1, wherein stoppers (19) and (20) for retaining the slide piece (30) are respectively installed at the other end of the lower portion facing the inside of the vehicle. Falling object capture device. 5. A lower end of the hanger hook (H), which faces the outside of the bucket (B), is integrally formed as a stopper (19) for retaining the slide piece (30) in a block shape. Together with the lower end of the hanger hook (H) which faces the inside of the bucket (B), the screw rod (23) for fixing the hanger hook to clamp the bucket (B) is connected to the above-mentioned block. The fallen object catching device for an aerial work vehicle according to claim 4, characterized in that the fallen object catching device (10) is screwed and fastened to a stopper (19) for retaining the mold so as to be able to move forward and backward from outside. 6. A separate slide piece (30) that fits into the slide guide groove (15) of the hanger hook (H).
Is fixed to the base end of the arm holder (A) so as to be detachable, and the surface where the slide piece (30) comes into contact with the corner (14) of the hanger hook (H) is smoothed (30a). The work piece for an aerial work platform according to claim 4, wherein the slide piece (30) is formed into a convex curved surface (30b) so that the slide piece (30) comes into contact with the protruding edge (13) of the hanger hook (H). Falling object capture device.