JPH04127797U - Aerial work trolley - Google Patents

Abstract

(57) [Summary] (with amendments) [Purpose] To increase work efficiency by increasing the swing range of the boom as much as possible without compromising the stability of the vehicle body. [Structure] A boom 3 that can move up and down is pivoted to the upper part of the vehicle body that can move forward and backward so that it can turn left and right via a pivot shaft 24, and a work cage 4 is installed at the tip of the boom 3. In the work trolley, the pivot shaft 24 is disposed on one side of the vehicle body in the left-right direction, and a swinging rod 31 having a counterweight 30 at the tip is pivotally pivoted on the other side of the vehicle body in the same direction so as to be freely pivotable left and right. and the counterweight when the boom 3 swings.
30 in the direction opposite to the direction of rotation of the boom 3.
The boom 3 and the swinging rod 31 are connected by a double rod type actuator 33.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an elevated work platform.

0002

[Conventional technology]

For example, high places used for harvesting, chemical spraying, pruning, etc. in orchards. As a work trolley, it has a pair of front and left wheels for running on the front and rear sides of the vehicle body, and a work area at the tip. In addition, there is a boom that can move up and down and has a work cage that serves as an operation box for the vehicle body, etc. Pivotally attached to the upper part of the vehicle body via a pivot axis located in the center of the vehicle body in the left and right direction. There are things that have been done.

0003 The platform used for aerial work such as fruit tree harvesting is sloped. This poses a problem in preventing the vehicle from overturning, but in the past, the boom pivot point A cover that swivels synchronously with the boom from the rear (to the side opposite to where the work cage is). A counterweight is integrated, and this counterweight balances the weight with the boom. (For example, the applicant's U.S. Patent Application 1983- 130746).

0004

[Problem that the idea aims to solve]

However, in the above conventional technology, the pivot shaft that supports the boom is located on the left and right sides of the vehicle body. The counterweight is simply integrated at the rear of the boom. Because it was only attached to Even if the However, if the working position changed slightly, the entire vehicle body had to be moved, resulting in poor work efficiency.

[0005] In view of these circumstances, the present invention aims to increase work efficiency by increasing the swing range of the boom as much as possible. The aim is to improve the rate.

[0006]

[Means to solve the problem]

In order to achieve the above purpose, the technical measures taken by the present invention are as follows: A boom 3 that can move vertically is pivoted to the top of the boom 2 via a pivot shaft 24 so as to be able to swing left and right. In an aerial work platform with a work cage 4 installed at the tip of the boom 3, The pivot shaft 24 is arranged on one side of the vehicle body 2 in the left-right direction, and From the other side, a swinging rod 31 having a counterweight 30 at the tip can be pivoted to the left and right. When the boom 3 is rotated, the counterweight 30 is moved in the opposite direction to the direction of the boom 3. A double rod type actuator is connected between the boom 3 and the swinging rod 31 in order to displace the boom 3 in the direction. It is located at the points connected by 33.

[0007]

[Effect]

In the present invention, the boom 3 and the swinging rod 31 supporting the counterweight 30 are The body 2 is placed separately on one side and the other side in the left and right direction, and the boom 3 rotates. Even in the neutral state (solid line position in Figure 1), the stability of the vehicle body 2 in the lateral direction is better than before. It has been improved.

[0008] Also, the boom 3 and the swinging rod 31 are connected by a double rod type actuator 33. For example, as shown in FIG. When swiveled to the side (right side), that same actuator 33 engages the counterweight 30 Since the boom 3 is moved to the other side (left side), even if the boom 3 is turned significantly to one side, the vehicle body 2 Sufficient weight balance in the left and right direction can be ensured.

[0009]

【Example】

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. In Figures 1 and 2, 1 indicates high-altitude crops used for harvesting, chemical application, pruning, etc. A commercial trolley with a boom that is pivotally attached to the top of the car body 2 and can be raised, lowered, and rotated. 3 and a work cage 4 provided at the tip of the boom 3.

0010 The vehicle body 2 includes a main frame 6 made of pipe material, and a rear part erected at the rear end of the main frame 6. It has a frame 7 and a pair of left and right reinforcing rods 8 that connect the front ends of the rear frame 7 and the main frame 6. Ru. At the front of the main frame 6, a pair of left and right front wheels 10 are supported on the outside. Further, a pair of left and right rear wheels 11 as driven wheels are supported at the rear. Furthermore, on the rear wheel 11 It uses caster wheels that can be moved freely in either direction.

[0011] 14 is an engine, which is mounted on the rear of the vehicle body 2, and is connected to a relay shaft 16 via a belt 15. A pair of left and right forward belts 17 and a reverse belt are connected from both left and right ends of this relay shaft 16. The power is transmitted to the left and right front wheels 10 via the rotor 18, gear mechanism 19, chain 20, etc. The sea urchin is turning. The forward belt 17 and the reverse belt 18 are connected to a tension type forward clutch 21 and Reverse clutches 22 are each provided, and each clutch 21, 22 is turned on and off. By doing so, the left and right front wheels 10 rotate forward or reverse simultaneously or independently, and the front wheels of the vehicle body 2 rotate. It is now possible to move forward, turn, and go backwards.

0012 Reference numeral 23 denotes a mounting frame that is U-shaped when viewed from the front and rear directions, and a pivot shaft 24 is protruded downward from this mounting frame 23. The pivot shaft 24 is spline-fitted to the rear frame 7 and the main frame 6, respectively. It is supported via bearings 25,26. This pivot shaft 24 is connected to the vehicle body as shown in FIG. 2 (from the right side in this example). Therefore, the mounting frame 23 is arranged at one corner of the rear frame 7.

[0013] The base of the boom 3 is pivotally attached to the mounting frame 23 via a horizontal shaft, and is rotatable. A support bracket 27 provided at the lower end of the shaft 24 and a lower bracket provided at the bottom center of the boom 3. A cylinder 29 for raising and lowering the boom is interposed between the boom and the cut 28. And then boom In the lowered position 3, the work cage 4 is now located near the front of the front wheel 10. ing.

[0014] 30 is particularly designed to balance the weight of the vehicle body 2 with the boom 3 in the left and right direction. 31 has its counterweight 30 at the tip and It is a supporting swinging rod. This swinging rod 31 has its base end on the other side (left side) of the rear frame 7. side) By being attached to the vertical shaft 32 fixed to the rear corner, it is possible to It is pivotally mounted to the right.

[0015] 33 is a double-rod type and double-acting hydraulic cylinder (actuator) fixed to the upper part of the rear frame 7. tuator) is interposed between the mounting frame 23 of the boom 3 and the swinging rod 31. That is, , this hydraulic cylinder 33 has rods 34 and 35 at both ends in the axial direction that move in and out simultaneously. In this embodiment, the tip of one rod 34 is located on the left side of the mounting frame 23 and is located on the pivot axis. It is pivotally connected to a bracket 36 that protrudes rearward than 24, and the tip of the other rod 35 is pivotally attached to the midway portion of the swinging rod 31 (the portion in front of the vertical axis) via the elongated hole 37. As a result, the mounting frame 23 and the swinging rod 31 are directly connected by this hydraulic cylinder 32. ing.

[0016] The hydraulic cylinder 33 for boom rotation and the cylinder 28 for lifting the boom are , operated by one pedal 40 provided on the work cage 4. ing. Further, the work cage 4 is provided with a pair of left and right travel control levers 38, 38. The left travel control lever 38 corresponds to the left front wheel 10, and the right travel control lever 38 corresponds to the left front wheel 10. 38 corresponds to front wheel 10 on the right side.

[0017] Furthermore, 39 is a hydraulic pump that converts the drive of the engine 14 into hydraulic pressure, and an oil pump (not shown) Pressure oil sent from this hydraulic pump 39 via a pressure hose causes the hydraulic cylinder to 33 and boom lifting cylinder 28 are activated. Reference numeral 41 indicates a shock absorber employed in the rear wheel 11 in this embodiment. This buffer device 41 is As shown in FIG. 3, there is a central pipe 42 that is a component of the main frame 6, and a The caster arm 43 is attached to be able to swing downward and the mounting fixed to the central pipe 42. The plate spring 45 is fixed to the lower surface of the attached bracket 44. This leaf spring 45 is It is located between the mounting bracket 44 and the caster arm 43, and is provided in a shape that extends from left to right. , are arranged so that both ends press the left and right sides of the caster arm 43, respectively. ing. Therefore, in this embodiment, for example, when driving on rough terrain as shown in FIG. Even in such a case, the caster arm 43 swings against the leaf spring 45, Make sure that both the left and right rear wheels 11, 11 are firmly in contact with the ground to ensure the stability of the vehicle body 2. It has become.

[0018] According to this embodiment having the above configuration, the boom 3 and the swinging rod 31 are arranged on both left and right sides of the vehicle body 2. Even when boom 3 is in the neutral state (solid line position) shown in Figure 1, Vehicle body 2: The lateral stability has been improved compared to the previous model, and the hydraulic cylinder When rods 34 and 35 of 33 are displaced to the left, when boom 3 is turned to the right, At the same time, the swinging rod 31 is turned to the left, so even if the boom 3 is turned to the right Sufficient weight balance of the vehicle body 2 can be ensured, which in turn maximizes the swing range of the boom 3. can be increased.

[0019] Further, according to this embodiment, a double rod type oil is installed between the mounting frame 23 of the boom 3 and the swinging rod 31. Since they are connected using a pressure cylinder 33, the structure is extremely simple and can be manufactured at low cost. There is also the advantage of being able to Although one embodiment of the present invention has been described above, the present invention is not limited to this. There isn't.

[0020] In other words, regarding the connection between the mounting frame 3 of the boom 3 and the swinging rod 31, the point is that the boom 3 swings. oil so as to displace the counterweight 30 in the direction opposite to the direction of rotation of the boom 3. It is sufficient to connect both rods 34 and 35 of the pressure cylinder 33, for example, as shown in FIG. As shown, the front end of the swinging rod 31 that supports the counterweight 30 at the rear end and the mounting frame 23 You may decide to connect it with the front side part.

[0021] In addition, the shock absorber 41 is not limited to the above-mentioned plate spring 45. For example, as shown in Fig. 6, the caster arms 47 are independently pivoted from the left and right sides of the main frame 6. , a buffer cylinder 48 is interposed between the caster arm 47 and the main frame 6. You can do it like this. In addition, an electric actuator will be used instead of the hydraulic cylinder 33 mentioned above. You may.

[0022]

[Effect of the idea]

As explained above, according to the present invention, the boom 3 and the cover are installed on both sides of the vehicle body 2 in the left and right direction. The counterweights 30 are placed separately so that when the boom 3 swings to one side, the counterweights 30 Since the eight 30 is displaced to the other side, even if the boom 3 is turned a lot, the vehicle body 2 will not move to the left or right. Ensuring sufficient weight balance in both directions and increasing the swing range of boom 3 as much as possible. Therefore, work efficiency can be improved.

[Brief explanation of drawings]

FIG. 1 is a plan view of an elevated work platform showing an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front view of the shock absorber.

FIG. 4 is a front view of the same.

FIG. 5 is a plan view of an elevated work platform showing a modified example.

FIG. 6 is a front view of another shock absorber.

[Explanation of symbols]

1 Aerial work trolley 2 car body 3 boom 4 working cage 24 Pivot axis 30 Counterweight 31 Swinging rod 33 Hydraulic cylinder (actuator)

Claims (1)

[Scope of utility model registration request] [Claim 1] A boom (3) that is vertically movable is pivotally attached to the upper part of a vehicle body (2) that can move forward and backward so as to be able to swing left and right via a pivot shaft (24). Working cage at the tip
(4) In the aerial work platform equipped with
4) is placed on one side of the vehicle body (2) in the left and right direction, and a swinging rod (31) having a counterweight (30) at the tip is swiveled left and right from the other side of the vehicle body (2) in the same direction. The counterweight (30) can be freely pivoted to the boom (3) when the boom (3) is turned.
(3) In order to displace the boom in a direction opposite to the turning direction,
(3) A double rod type actuator (33) is connected between the swinging rod (31) and the swinging rod (31).
A high-altitude working trolley characterized by being connected by.