JP3208322U - Upper obstacle collision prevention member for preventing workers in the basket of an aerial work vehicle from colliding with the upper obstacle - Google Patents

Abstract

An upper obstacle collision preventing member that can prevent a worker from colliding with an upper obstacle with a simple configuration and at a low cost is provided. A sheath tube 2 having a first through hole 3 on a side surface, and a plurality of second through holes 5 inserted in the inside of the sheath tube 2 and provided at substantially equal intervals in the axial direction on the side surface. The intermediate tube 4 includes a plurality of second through holes 5 and a pin 6 inserted into the first through hole 3, and the pin 6 has a pin body having one end and the other end, and is rotatable at one end. The attached pin removal prevention tool, the spring locking portion 9 formed to protrude outwardly on the outer surface of the pin body on the other end side, and the pin removal prevention device installation side of the spring locking portion 9 formed in a spiral shape And a spring provided so as to cover the outer surface of the pin body, and the pin is inserted into the first through hole 3 and the second through hole 5 so that the pin removal prevention tool is in a direction substantially perpendicular to the pin body. In this state, one end of the spring is in contact with the side surface of the sheath tube 2 and the other end is in contact with the side surface of the spring locking portion 9 where the pin removal prevention tool is installed. [Selection] Figure 2

Description

  The present invention relates to an upper obstacle collision preventing member that prevents a worker in a basket of an aerial work vehicle from colliding with an upper obstacle.

  For example, an aerial work vehicle may be used to check railway overheads, highways, bridges, and the like. Since an aerial work platform is provided with a basket that can be raised and lowered, it is possible for a worker to check the elevated railways and the like as described above by getting into the basket and raising the basket.

  In such an aerial work vehicle, the height of the worker is higher than the height of the basket. Therefore, when the basket is raised excessively, the worker may collide with the above-described railway overpass or the like.

  In order to avoid the collision of workers, Patent Document 1 discloses that a proximity sensor is interlocked with an emergency stop switch for raising and lowering a basket (see JP-A-2006-055983).

Japanese Patent Laid-Open No. 2006-055983

  However, since the above-described conventional apparatus uses a complicated device such as a proximity sensor, the configuration of the apparatus is complicated, and the price of the apparatus may increase.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an upper obstacle collision preventing member that can prevent a worker from colliding with an upper obstacle with a simple configuration and at a low cost. And

  In order to solve the above-mentioned problem, an upper obstacle collision preventing member according to an aspect of the present invention is an aerial work vehicle including a basket that can be moved up and down, and an operator in the basket is above the aerial work vehicle. An upper obstacle collision preventing member for preventing collision with an upper obstacle, a sheath tube having a first through-hole on a side surface, inserted into the inside of the sheath tube, and substantially equal in the axial direction on the side surface An intermediate tube having a plurality of second through holes provided at intervals; a pin inserted into any one of the plurality of second through holes and the first through hole; Is a pin body having one end and the other end, a pin drop prevention device rotatably attached to the one end, and a spring latch formed to project outward on the outer surface of the pin body on the other end side And the pin omission of the spring locking portion formed in a spiral shape A spring provided on the stopper installation side so as to cover the outer surface of the pin body, and the pin is inserted into the first through hole and the second through hole, so that the pin removal prevention tool is One end of the spring is in contact with the side surface of the sheath tube, and the other end is in contact with the side surface of the spring retaining portion where the pin drop-off prevention device is installed in a state of being oriented in a direction substantially perpendicular to the pin body. It is characterized by.

  The above-described upper obstacle collision preventing member is composed of a sheath tube, a middle tube, and a pin for positioning these, which have an inexpensive and simple configuration, so that the upper obstacle can be easily and easily configured by an operator. Can be prevented.

The sheath tube and the middle tube or any one of them may be made of an insulating material. Thus, by configuring the sheath tube and the middle tube or any one of them with an insulating material, for example, even if this member comes into contact with the wiring provided in the lower part of the railway overpass, the short circuit of the wiring can be suppressed. it can.

  The insulating material may be fiber reinforced plastic. Thus, by selecting the fiber reinforced plastic as the insulating material, the above-described short circuit can be more effectively suppressed, and the collision of the worker can be more effectively suppressed due to the strength of the material. .

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress that the worker in the basket of an aerial work vehicle collides with the upper obstruction above the said aerial work vehicle with simple structure and cheaply.

FIG. 1 is a schematic view of the upper obstacle collision preventing member according to the first embodiment of the present invention in a retracted and retracted state. FIG. 2 is a schematic view of the upper obstacle collision preventing member according to the first embodiment of the present invention in an extended state. FIG. 3 is a schematic view showing a usage state of the upper obstacle collision preventing member according to the first embodiment of the present invention. FIG. 4 is a schematic view of a sheath tube constituting the upper obstacle collision preventing member according to the first embodiment of the present invention. FIG. 5 is a schematic view of a middle tube constituting the upper obstacle collision preventing member according to the first embodiment of the present invention. 6A is a schematic view showing a state in which the pin of the upper obstacle collision preventing member according to the first embodiment of the present invention is inserted, FIG. 6B is an enlarged view of the inserted pin, FIG. (C) is a top view of a pin.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present embodiment is intended to facilitate understanding of the present invention and is not intended to limit the present invention. In the following explanation, terms indicating specific directions and positions (for example, terms including “up” and “down”) are used as necessary, but the use of the terms facilitates understanding of the device with reference to the drawings. Therefore, the technical scope of the present invention is not limited by the meaning of these terms.

<First embodiment>
FIG. 1 is a schematic view of the upper obstacle collision preventing member according to the first embodiment of the present invention in a retracted and retracted state, FIG. 2 is a schematic view in the extended state, and FIG. 3 shows a use state thereof. FIG. The upper obstacle collision preventing member 1 according to the first embodiment is such that an operator in the basket 20 collides with an upper obstacle 22 above the aerial work vehicle in the aerial work vehicle including the basket 20 that can be moved up and down. As shown in FIGS. 1 and 2, the sheath tube 2 having the first through-hole 3 on the side surface and the inside of the sheath tube 2 are inserted, and the side surface is substantially in the axial direction. A middle tube 4 having a plurality of second through holes 5 provided at equal intervals, a pin 6 inserted into any one of the plurality of second through holes 5 and the first through hole 3, The pin 6 includes a pin main body 7 having one end 11 and the other end 12, a pin removal prevention tool 8 rotatably attached to the one end 11, and an outward direction on the outer surface of the pin main body 7 on the other end 12 side. The spring locking part 9 is formed so as to protrude from the pin, and the pin of the spring locking part 9 formed in a spiral shape is prevented from coming off. A spring 10 provided so as to cover the outer surface of the pin body 7 on the tool 8 installation side, and the pin 6 is inserted into the first through hole 3 and the second through hole 5 so that the pin drop prevention tool 8 is provided. In a state in which the spring 10 is oriented in a direction substantially perpendicular to the pin body 7, one end 15 of the spring 10 is on the side surface of the sheath tube 2, and the other end 16 is on the side surface of the spring locking portion 9 where the pin removal prevention tool 8 is installed. It is in contact. If the basket 20 rises excessively, the worker 21 in the basket 20 may collide with the upper obstacle 22. As shown in FIG. 3, the upper obstacle collision preventing member 1 according to the first embodiment is installed such that its axial direction substantially coincides with the upward and downward direction of the basket 20 and protrudes upward from the basket 20. By doing so, the upper end of the upper obstacle collision preventing member 1 comes into contact with the upper obstacle 22, thereby preventing further raising of the basket 20 and avoiding the collision of the worker 21 with the upper obstacle 22. can do. Hereinafter, each component of the upper obstacle collision preventing member 1 will be described in detail.

(Sheath tube)
FIG. 4 is a schematic view of the sheath tube 2. The sheath tube 2 is formed in a tubular shape, and has a first through hole 3 above the side surface thereof as shown in FIG. A pair of the first through holes 3 may be formed at positions facing the sheath tube 2. Thus, by providing a pair of first through holes 3 at opposing positions, one pin 6 can be inserted into the pair of first through holes 3, and the sheath tube 2 and the middle tube 4 are more stable. And can be fixed.

  The cross-sectional shape of the sheath tube 2 is not particularly limited as long as the strength can be sufficiently ensured, and an arbitrary shape can be selected. For example, a circular shape, a rectangular shape, an elliptical shape, or the like can be adopted. From the viewpoint of production cost, the cross-sectional shape of the sheath tube 2 is preferably circular.

  The length of the sheath tube 2 is not particularly limited, but may be a length that substantially matches the height of the basket 20, for example. By making the length of the sheath tube 2 substantially coincide with the height of the basket 20, the upper obstacle collision preventing member 1 installed in the basket 20 in the state where the middle tube 4 is completely accommodated in the sheath tube 2 is Does not interfere with the work of aerial work platforms. As a minimum of the length of sheath tube 2, 700 mm is preferred, 800 mm is more preferred, and 850 mm is still more preferred. On the other hand, the upper limit of the length of the sheath tube 2 is preferably 1,100 mm, more preferably 1,000 mm, and further preferably 950 mm. If the length of the sheath tube 2 is smaller than the lower limit, the middle tube 4 may not be accommodated. On the other hand, if the length is larger than the upper limit, the upper obstacle collision preventing member 1 may interfere with the traveling of the aerial work vehicle.

  The average length of the width | variety of the sheath pipe 2 is not specifically limited, As long as the space of the worker 21 can be ensured enough, it can be selected arbitrarily. As a minimum of the average length of the width of sheath tube 2, 35 mm is preferred, 40 mm is more preferred, and 45 mm is still more preferred. On the other hand, the upper limit of the average length of the width of the sheath tube 2 is preferably 60 mm, more preferably 55 mm, and even more preferably 50 mm. If the average length of the width of the sheath tube 2 is smaller than the lower limit, the sheath tube 2 may not be able to ensure sufficient strength. On the other hand, if the average length of the width of the sheath tube 2 is larger than the above upper limit, the work space of the worker 21 becomes narrow, and the work efficiency of the worker 21 may be reduced.

  The average thickness of the sheath tube 2 is not particularly limited, and can be arbitrarily selected as long as the strength of the sheath tube 2 can be sufficiently ensured. As a minimum of average thickness of sheath tube 2, 1.5 mm is preferred, 1.75 mm is more preferred, and 2.0 mm is still more preferred. On the other hand, the upper limit of the average thickness of the sheath tube 2 is preferably 3.0 mm, more preferably 2.75 mm, and even more preferably 2.5 mm. If the average thickness of the sheath tube 2 is smaller than the above lower limit, the sheath tube 2 may not be able to ensure sufficient strength. On the other hand, when the average thickness of the sheath tube 2 is larger than the above upper limit, the width of the sheath tube 2 is also increased, the work space of the worker 21 is narrowed, and the work efficiency may be lowered.

  The sheath tube 2 has an upper end and a lower end, and the first through-hole 3 is preferably provided at a predetermined distance from the upper end. As a minimum of the above-mentioned distance, 85 mm is preferred, 90 mm is more preferred, and 95 mm is still more preferred. On the other hand, the upper limit of the distance is preferably 115 mm, more preferably 110 mm, and even more preferably 105 mm. If the distance is smaller than the lower limit, the distance from the first through hole 3 to the upper end of the sheath tube 2 cannot be secured, and the strength therebetween may be reduced. On the other hand, if the distance is larger than the upper limit, the distance from the first through hole 3 to the upper end thereof becomes large, and the length of the upper obstacle collision preventing member 1 in the extended state may not be sufficient.

  As a minimum of the maximum diameter of the 1st penetration hole 3, 5 mm is preferred, 7 mm is more preferred, and 9 mm is still more preferred. On the other hand, the upper limit of the maximum diameter is preferably 15 mm, more preferably 13 mm, and even more preferably 11 mm. When the maximum diameter is smaller than the lower limit, it is difficult to pass the pin 6 through the first through hole 3 and the work efficiency of the worker 21 may be reduced. On the other hand, if the maximum diameter is larger than the upper limit, the mechanical strength around the first through hole 3 may be reduced.

  The material constituting the sheath tube 2 is not limited as long as the sheath tube 2 can ensure sufficient strength, and can be arbitrarily selected. For example, a metal such as stainless steel, brass, copper, iron, steel, etc. Examples thereof include materials, ceramic materials, and fiber reinforced plastics (FRP). Of these, FRP is particularly preferred. Since the FRP does not have conductivity, even if the upper obstacle collision preventing member 1 comes into contact with the wiring under the railway overhead, it is possible to suppress the short circuit of the wiring. Moreover, since FRP can ensure sufficient intensity | strength, it can suppress damage to the member 1 for upper obstacle collision prevention.

(Middle pipe)
FIG. 5 is a schematic view of the middle tube 4. The middle tube 4 is inserted through the inside of the sheath tube 2 and has a plurality of second through holes 5 provided at substantially equal intervals in the axial direction (that is, the direction from one end of the middle tube 4 to the other end) on the side surface. .

  The cross-sectional shape of the intermediate tube 4 is not particularly limited as long as the strength can be sufficiently ensured, and for example, a circular shape, a rectangular shape, an elliptical shape, or the like can be adopted as the shape of the sheath tube 2. From the viewpoint of production cost, the cross-sectional shape of the sheath tube 2 is preferably circular. The cross-sectional shape of the middle tube 4 may be the same as the shape of the sheath tube 2. In particular, the cross-sectional shape of the middle tube 4 is circular, and the cross-sectional shape of the sheath tube 2 is preferably circular. Thus, by making the cross-sectional shape of the intermediate tube 4 and the cross-sectional shape of the sheath tube 2 coincide with each other, the wobble of the intermediate tube 4 with respect to the sheath tube 2 can be suppressed.

  The lower limit of the difference between the maximum diameter of the sheath tube 2 and the maximum diameter of the middle tube 4 is preferably 0 mm, more preferably 5 mm, and even more preferably 10 mm. On the other hand, the upper limit of the difference between the maximum diameter of the sheath tube 2 and the maximum diameter of the middle tube 4 is preferably 25 mm, more preferably 20 mm, and even more preferably 15 mm. If the difference between the maximum diameter of the sheath tube 2 and the maximum diameter of the middle tube 4 is smaller than the lower limit, the middle tube 4 may be difficult to slide with respect to the sheath tube 2. On the other hand, if the difference is larger than the upper limit, the middle tube 4 may easily wobble with respect to the sheath tube 2.

  The length of the middle tube 4 is not particularly limited, but may be substantially the same as the length of the sheath tube 2, for example. By making the length of the middle tube 4 substantially coincide with the length of the sheath tube 2, the upper obstacle collision preventing member 1 is mounted on the aerial work vehicle in a state where the middle tube 4 is completely accommodated in the sheath tube 2. Does not interfere with driving. As a minimum of the length of middle tube 4, 750 mm is preferred, 850 mm is more preferred, and 900 mm is still more preferred. On the other hand, the upper limit of the length of the intermediate tube 4 is preferably 1,150 mm, more preferably 1,050 mm, and even more preferably 1,000 mm. If the length of the middle tube 4 is smaller than the above lower limit, the length of the upper obstacle collision preventing member 1 in the stretched state may not be sufficient. On the other hand, if the length is larger than the upper limit, the upper obstacle collision preventing member 1 may interfere with the traveling of the aerial work vehicle.

  The average length of the width of the middle tube 4 is not particularly limited, and can be arbitrarily set as long as the middle tube 4 can slide with respect to the sheath tube 2. As a minimum of the average length of the width of middle tube 4, 25 mm is preferred, 30 mm is more preferred, and 35 mm is still more preferred. On the other hand, the upper limit of the average length of the width of the middle tube 4 is preferably 50 mm, more preferably 45 mm, and even more preferably 40 mm. If the average length of the width of the intermediate tube 4 is smaller than the above lower limit, the intermediate tube 4 may not be able to ensure sufficient strength. On the other hand, if the average length of the width of the middle tube 4 is larger than the above upper limit, the width of the sheath tube 2 is also increased, and the work space for the worker 21 may be reduced. Thereby, there exists a possibility that the working efficiency of the worker 21 may fall.

  The average thickness of the intermediate tube 4 is not particularly limited, and can be arbitrarily set as long as the strength of the intermediate tube 4 can be sufficiently ensured. As a minimum of average thickness of middle tube 4, 1.5 mm is preferred, 1.75 mm is more preferred, and 2.0 mm is still more preferred. On the other hand, the upper limit of the average thickness of the middle tube 4 is preferably 3.0 mm, more preferably 2.75 mm, and even more preferably 2.5 mm. If the average thickness of the intermediate tube 4 is smaller than the lower limit, the intermediate tube 4 may not be able to ensure sufficient strength. On the other hand, when the average thickness of the middle tube 4 is larger than the above upper limit, the width of the sheath tube 2 is also increased, and the work space for the worker 21 may be reduced. Thereby, there exists a possibility that the working efficiency of the worker 21 may fall.

  The middle tube 4 has an upper end and a lower end, and the second through hole 5 closest to the lower end among the plurality of second through holes 5 is preferably provided at a position at a predetermined distance from the lower end. As the lower limit of the distance, 85 mm is preferable, 90 mm is more preferable, and 95 mm is more preferable, as in the case of the first through-hole 3. On the other hand, the upper limit of the distance is preferably 115 mm, more preferably 110 mm, and even more preferably 105 mm. If the distance is smaller than the lower limit, the distance from the second through hole 5 close to the lower end to the lower end cannot be secured, and the strength therebetween may be reduced. On the other hand, if the distance is larger than the upper limit, the distance from the second through hole 5 to the lower end is increased, and the length of the upper obstacle collision preventing member 1 in the extended state may not be sufficient.

  The lower limit of the distance between adjacent ones of the plurality of second through holes 5 is preferably 50 mm, more preferably 70 mm, and still more preferably 90 mm. On the other hand, the upper limit of the interval is preferably 150 mm, more preferably 130 mm, and even more preferably 110 mm. If the interval is smaller than the lower limit, the number of second through holes 5 provided in the intermediate tube 4 increases, and the strength of the intermediate tube 4 may be reduced. On the other hand, if the interval is larger than the upper limit, it may be difficult to adjust the length of the upper obstacle collision preventing member 1 in multiple stages.

  As a minimum of the maximum diameter of the 2nd penetration hole 5, 5 mm is preferred, 7 mm is more preferred, and 9 mm is still more preferred. On the other hand, the upper limit of the maximum diameter is preferably 15 mm, more preferably 13 mm, and even more preferably 11 mm. When the maximum diameter is smaller than the lower limit, it is difficult to pass the pin 6 through the second through hole 5 and the work efficiency may be reduced. On the other hand, if the maximum diameter is larger than the upper limit, the mechanical strength around the second through hole 5 may be reduced.

  The material constituting the intermediate tube 4 is not limited as long as the intermediate tube 4 can ensure sufficient strength, and can be arbitrarily selected. For example, the same material as that of the sheath tube 2 is used. Can do.

  As shown in FIG. 5, the middle tube 4 may have a rubber cap 30 at its upper end. Since the middle tube 4 has the rubber cap 30 at its upper end, the upper obstacle collision preventing member 1 can be prevented from damaging the upper obstacle 22.

(pin)
FIG. 6A is a schematic view showing a state in which the pin of the upper obstacle collision preventing member according to the first embodiment of the present invention is inserted, and FIG. 6B is an enlarged view of the inserted pin portion. 6 (c) is a top view of the pin. As shown in FIGS. 6B and 6C, the pin 6 has a pin body 7 and is inserted into any one of the plurality of second through holes 5 and the first through hole 3. The middle tube 4 can be fixed to the sheath tube 2.

  The pin body 7 includes, at one end 11, a pin drop prevention tool accommodation space 13 in which the pin drop prevention tool 8 is accommodated. The pin dropout prevention device accommodating space 13 is formed from one end 11 of the pin body 7 to a midway position between the one end 11 and the other end 12, and a foot portion 14 for holding the pin dropout prevention device 8 is located on both sides thereof. It is formed one by one. Holes (not shown) are formed at opposite positions inside the two feet 14, respectively, while through holes (not shown) are formed in the pin drop prevention tool 8. By inserting the needle-like body through these holes and through-holes, the pin drop prevention tool 8 is attached to the foot 14 in a rotatable state. The pin removal prevention device accommodating space 13 opens from one side to the other side in a direction perpendicular to both the direction of the needle-like body and the direction connecting the one end 11 and the other end 12 (hereinafter referred to as “direction A”). It is good to have. By opening from one side to the other side of the pin drop-out prevention device accommodating space 13, the pin drop-out prevention device 8 can be rotated without contacting the pin main body 7.

  The shape of the pin drop prevention tool 8 is not particularly limited as long as it can pass through the first through hole 3 and the second through hole 5. For example, an elongated plate-like body, an elongated rod-like body, etc. Can be mentioned. As the shape, an elongated plate-like body is particularly preferable. By making the said shape into an elongate plate-shaped body, manufacture can be made easy and stability of rotation of the pin omission prevention tool 8 can be improved.

  The shape when the through hole of the pin drop prevention tool 8 is viewed from above is not particularly limited as long as the rotation of the pin drop prevention tool 8 is not suppressed, and examples thereof include a circle and an ellipse. As the shape, an elliptical shape is particularly preferable. In particular, the direction of the major axis of the ellipse is preferably substantially coincident with the longitudinal axis of the pin drop prevention tool 8. In the state where the pin omission prevention device 8 is arranged perpendicularly to the pin body 7 by making the above shape an oval and making the direction of the major axis of the oval substantially coincide with the longitudinal axis of the pin omission prevention device 8 The pin drop prevention tool 8 can be moved in the above-described direction A, and the pin drop prevention tool 8 can be arranged at a desired position.

  At the other end 12 of the pin body 7, a spring locking portion 9 is formed on the outer surface of the pin body 7 so as to protrude outward. The spring 10 has a spiral shape and is disposed on the one end 11 side of the spring locking portion 9 so as to cover the outer surface of the pin body 7. In a state where the pin 6 is inserted into the first through hole 3 and the second through hole 5 and the pin removal preventing tool 8 is oriented in a direction substantially perpendicular to the pin body 7, one end 15 of the spring 10 is The other end 16 of the spring 10 is in contact with the spring locking portion 9 on the side surface of the sheath tube 2, and the spring 10 is separated from the sheath tube 2 by the spring 10 (hereinafter referred to as “direction B”). Upon receiving the force, the pin drop prevention tool 8 oriented in the direction perpendicular to the pin body 7 tries to move in the direction B. The pin drop prevention tool 8 abuts against the opposite side surface of the sheath tube 2, so that the pin 6 is stably held without dropping from the first through hole 3 and the second through hole 5.

  The length of the spring 10 is not particularly limited as long as it can be pressed so that the spring locking portion 9 moves away from the sheath tube 2. As a minimum of the length of spring 10, 50 mm is preferred, 60 mm is more preferred, and 70 mm is still more preferred. On the other hand, the upper limit of the length of the spring 10 is preferably 100 mm, more preferably 90 mm, and even more preferably 80 mm. If the length is smaller than the lower limit, the strength of the spring 10 may be relatively lowered. On the other hand, if the length is larger than the upper limit, the length that the pin 6 protrudes from the sheath tube 2 becomes excessive, and the pin 6 may interfere with the work of the worker 21.

  The spring constant of the spring 10 is not particularly limited as long as it can be pressed moderately, and can be arbitrarily set. The lower limit of the spring constant is preferably 1,000 N / m, more preferably 1,200 N / m, still more preferably 1,400 N / m. On the other hand, the upper limit of the spring constant is preferably 2,000 N / m, more preferably 1,800 N / m, and still more preferably 1,600 N / m. By setting the spring constant within the above range, the pin 6 can be prevented from falling off and the pin 6 can be handled easily.

<Other embodiments>
The upper obstacle collision preventing member may be used by directly attaching to the basket of the aerial work vehicle with a fixture, or a plate member is attached to the lower end of the upper obstacle collision preventing member, and the plate member is the floor of the basket. The upper obstacle collision preventing member may be placed so as to protrude upward from the plate member. One or a plurality of upper obstacle collision preventing members may be attached to the plate member. With this configuration, it is possible to prevent a worker in the basket of the aerial work vehicle from colliding with an upper obstacle above the aerial work vehicle with a simple configuration and at a low cost.

  As described above, the upper obstacle collision preventing member according to the present invention has a simple structure and is inexpensive and allows an operator in the basket of an aerial work vehicle to collide with an upper obstacle above the aerial work vehicle. Therefore, it can be used widely and suitably for preventing collision of workers in the basket of an aerial work vehicle.

DESCRIPTION OF SYMBOLS 1 Upper obstacle collision prevention member 2 Sheath pipe 3 1st through-hole 4 Middle pipe 5 2nd through-hole 6 Pin 7 Pin main body 8 Pin removal prevention tool 9 Spring latching part 10 Spring 11 One end 12 Other end 13 Pin Detachment prevention device storage space 14 Foot 15 One end 16 Other end 20 Basket 21 Worker 22 Upper obstacle

Claims (3)

An upper obstacle collision preventing member for preventing an operator in the basket from colliding with an upper obstacle above the aerial work vehicle in an aerial work vehicle including a basket that can be raised and lowered,
A sheath tube having a first through hole on a side surface;
An inner tube that is inserted into the inside of the sheath tube and has a plurality of second through holes provided on the side surface at substantially equal intervals in the axial direction;
Including any one of the plurality of second through holes and a pin inserted into the first through hole,
The pin includes a pin body having one end and the other end, a pin drop prevention device rotatably attached to the one end, and a spring formed to project outward on the outer surface of the pin body on the other end side A locking portion, and a spring formed in a spiral shape on the side of the pin locking prevention device of the spring locking portion so as to cover the outer surface of the pin body,
In a state where the pin is inserted into the first through hole and the second through hole and the pin removal prevention tool is oriented in a direction substantially perpendicular to the pin body, one end of the spring is the sheath A member for preventing collision of an upper obstacle, the other end of which is in contact with the side surface of the pin of the spring locking portion on the side surface of the tube.   The upper obstacle collision preventing member according to claim 1, wherein the sheath tube and the middle tube or any one of them is made of an insulating material.   The upper obstacle collision preventing member according to claim 2, wherein the insulating material is a fiber reinforced plastic.

Images