Indirect work assistance device

Abstract

To provide an indirect work auxiliary device capable of simultaneously performing accurate horizontal movement and vertical movement by using no driving force.SOLUTION: An indirect work auxiliary device 1 is mounted onto a handrail B of a bucket by a handrail mounting unit 4 of a body 2. An operation rod fixing unit 14 having a gripping unit 16 for gripping a remote operation rod is constituted so as to be movable in a horizontal direction and liftable with respect to the body 2. An upper portion of a reference line L2 indicating an elevation direction is inclined to an inside of the bucket with respect to a reference line L1 in a vertical direction of the handrail B of the bucket.SELECTED DRAWING: Figure 1

Description

Technical Field

[0005] ,

[0004] ,

[0001] The present invention relates to an indirect work assistance device for assisting overhead line construction by indirect work using an aerial work vehicle.

Background Art

[0002] In overhead line construction such as wire erection and repair, live work in a powered state is often performed. For this reason, tools for safely performing indirect work have been considered.

[0003] For example, when cutting a wire, a tensioning device with a total weight of several kilograms having a metal wire gripper is used. In such a case, the operator has to install the tensioning device by remote operation using a tip tool attached to a remote control rod and handle the wire. In the case of work on a bucket using an aerial work vehicle, work by about two people is common, and even if the work is shared, the burden on each person is large.

[0004] In order to reduce the burden on each worker and perform work safely, tools and devices for supporting a remote control rod have been considered. FIG. 9 shows a fixing device 100 for a conventional live work tool. The fixing device 100 can be attached to the handrail B of the bucket and can fix the remote control rod S. Since the clamp 101 is provided via the ball joint 102, the direction of the fixed remote control rod S can be freely changed. Such a device is disclosed in Patent Document 1.

[0005] On the other hand, devices equipped with a positioning mechanism using driving force have also been considered. Figure 10 shows a conventional helper 200 for a work tool. Similar to the fixing device 100 in Figure 9, it is attached to the handrail B of the bucket and is equipped with a horizontal drive unit 201 and a vertical drive unit 202. The driving force of the horizontal drive unit 201 allows the movable part 204 to move horizontally, and the driving force of the vertical drive unit 202 causes the support column 205 to extend and retract vertically. The horizontal drive unit 201 and the vertical drive unit 202 are operated by a foot switch 203. Such a device is disclosed in Patent Document 2. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2000-324635 [Patent Document 2] Japanese Patent Publication No. 2017-112813 [Overview of the project] [Problems that the invention aims to solve]

[0007] However, with the fixed device 100 shown in Figure 9, the remote control rod S can only be rotated around the ball joint 102, and in order to adjust the height or horizontal direction, the entire bucket must be moved. However, it is not easy to move the bucket precisely while suppressing the movement of the end due to the recoil, and skilled operation is required to perform it safely.

[0008] Furthermore, with the helper 200 as shown in Figure 10, the maximum load capacity of the bucket is reduced by the weight of the drive mechanism, and the workspace is also constrained. In addition, since the drive operation for vertical and horizontal movement and the position adjustment of the telescopic and rotating mechanisms cannot be performed simultaneously, light and responsive operation that matches the operator's feel is not possible.

[0009] Therefore, in this invention, precise horizontal and vertical movement can be performed simultaneously without using a driving force. The objective is to provide an indirect work assistance device that can perform the following tasks. [Means for solving the problem]

[0010] To achieve the above objective, the present invention provides an indirect work assistance device that is attached to the handrail of a bucket of an aerial work platform and supports a remote control rod in an adjustable position, characterized by comprising: an operating rod fixing part for fixing the remote control rod; a lifting guide part that supports the operating rod fixing part so as to be able to move up and down so as to rise while moving horizontally inward to the bucket; a horizontal guide part that supports the lifting guide part so as to be able to move horizontally along the handrail, and a handrail mounting part that is arranged to hang on the upper end of the handrail and is attached by clamping the vertical portion of the handrail.

[0011] Furthermore, in addition to the above configuration, the indirect work assistance device of the present invention is characterized in that the lifting guide section comprises a biasing means for biasing the operating rod fixing section upward, and a locking means for locking the operating rod fixing section at any lifting position.

[0012] Furthermore, in addition to the above configuration, the indirect work assistance device of the present invention is characterized in that the lifting guide portion comprises a winding member having a fixed end and a free end connected to the operating rod fixing portion side within the lifting guide portion, and a movable pulley around which the winding member is wound and which is biased by the biasing means so as to pull up the operating rod fixing portion.

[0013] Furthermore, in addition to the above configuration, the indirect work assistance device of the present invention is characterized in that the lifting guide portion comprises a second winding member having a second fixed end within the lifting guide portion and a second free end connected to the operating rod fixing portion, and a second movable pulley around which the second winding member is wound such that the second free end is connected to a rotating shaft and the biasing force of the biasing means transmitted via the free end pulls up the operating rod fixing portion. [Effects of the Invention]

[0014] As described above, according to the indirect work assistance device of the present invention, the operating rod fixing part is supported so as to be able to move up and down relative to the lifting guide part, and the lifting guide part is supported so as to be able to move horizontally relative to the horizontal guide part. This makes it possible to perform lifting and horizontal movement operations simultaneously. Furthermore, the lifting guide part guides the lifting and lowering in such a way that it moves horizontally toward the inside of the bucket when rising, rather than in the vertical direction, so that no in-plane force is generated on the vertical portion of the bucket's handrail during either lifting or horizontal movement. In other words, an out-of-plane force is generated on the vertical portion of the bucket's handrail, which increases the clamping pressure between the handrail mounting part and the bucket, thus stabilizing the mounting state to the bucket.

[0015] Furthermore, according to the present invention, in addition to the above effects, the lifting guide section is biased by the biasing means to pull the operating rod fixing section upward, thereby reducing the load on the remote control rod and the like. Also, since the lifting position of the operating rod fixing section can be arbitrarily locked by the locking means, it is easy to switch from combined vertical and horizontal movement to horizontal movement alone, and fine adjustments in the horizontal direction can be made accurately.

[0016] Furthermore, according to the present invention, in addition to the above effects, the lifting guide section is equipped with a movable pulley, the fixed end of which is provided within the lifting guide section, and the winding member wrapped around which the force generated at the free end is transmitted to the operating rod fixing section. The biasing means biases the movable pulley in the direction of lifting the operating rod fixing section. As a result, the operating rod fixing section can be lifted with twice the amount of movement of the movable pulley.

[0017] Furthermore, according to the present invention, in addition to the above effects, the lifting guide section has the second fixed end of the second winding member located within its own lifting guide section, and the force generated at the second free end is transmitted to the operating rod fixing section. It is equipped with a second movable pulley configured to allow movement. Furthermore, the free end of the movable pulley is connected to the rotation axis of the second movable pulley. In this way, a composite pulley is formed by the movable pulley and the second movable pulley, so that the fixing part of the operating rod is indirectly lifted by the free end with a movement amount four times that of the movable pulley alone.

Brief Description of the Drawings

[0018] [Figure 1] This is a front view of the indirect work assisting device of the present invention. [Figure 2] This is a side view of the indirect work assisting device of FIG. 1. [Figure 3] This is a perspective view showing the internal structure of the indirect work assisting device. [Figure 4] This is a perspective view with a partial break of the lifting part and the lifting guide part. [Figure 5] This is a schematic diagram of the lifting part and the lifting guide part. [Figure 6] This is a schematic diagram showing the operation of the lifting part and the lifting guide part. [Figure 7] This is a schematic diagram showing the first modification example of the lifting part and the lifting guide part. [Figure 8] This is a schematic diagram showing the second modification example of the lifting part and the lifting guide part. [Figure 9] This is a view showing the fixing device of the conventional live-line working tool. [Figure 10] This is a view showing the helper of the conventional working tool.

Embodiments of the Invention

[0019] Hereinafter, the indirect work assisting device according to the embodiment of the present invention will be described with reference to the drawings. The same reference numerals will be used for the same structures for description.

[0020] FIG. 1 is a front view of the indirect work assisting device 1 of the present invention. This indirect work assisting device 1 has a structure for fixing a remote control rod upward and is used by being attached to the handrail of the bucket of an aerial work platform. When using the indirect work assisting device 1, in the indirect work of overhead line construction, positioning based on the bucket becomes easy. As a result, the work burden can be reduced and the work time can be shortened.

[0021] Although not shown in FIG. 1, with respect to the indirect work assisting device 1 viewed from the front, the direction in which the handrail of the bucket extends is arranged in the left-right direction.

[0022] The operating rod fixing part 14 shown in Figure 1 is the part that moves in conjunction with the remote control rod. Specifically, the operating rod fixing part 14 has a gripping part 16, a rotating part 18, a forward / backward sliding part 22, and a lifting / lowering part 20.

[0023] The gripping section 16 is provided to fix the remote control rod, and a clamp-type configuration is shown here as an example. The rotating section 18 can rotate the remote control rod in conjunction with the gripping section 16. In the configuration according to this embodiment, a ball joint configuration is used for the rotating section 18. The front and rear sliding section 22 is configured to slide the components above the rotating section 18 in a front and rear direction, with the outside of the bucket facing forward and the inside of the bucket facing backward, relative to the mounting position of the indirect work assistance device 1. The lifting section 20 is configured to move up and down relative to the lifting guide section 8, which is located inside the cover 20d. In Figure 1, the position of the lifting guide section 8 is shown by a dotted line.

[0024] The operating rod fixing section 14 is fitted with a lifting brake 12 having a brake wire 12a and a brake release lever 12b. When the brake release lever 12b is not operated, the lifting brake 12 locks the operating rod fixing section 14 so that it cannot move up or down relative to the lifting guide section 8. Only when the brake release lever 12b is used is the operating rod fixing section 14 able to move up or down.

[0025] The main body 2 has a horizontal guide section 6 that guides the lifting guide section 8 so that it can move horizontally. In other words, the lifting guide section 8 and the operating rod fixing section 14 are integrated and configured to be able to move relative to the horizontal guide section 6 in the horizontal direction. The horizontal guide section 6 has a horizontal guide rail 6a on the upper side and a horizontal guide rail 6b on the lower side, and these two horizontal guide rails 6a and 6b are directly connected to the lifting guide section 8.

[0026] The main body 2 is fixed to the bucket's handrail using two mounting clamps 4a. The main body 2 is also equipped with a lifting bracket 24. This lifting bracket 24 allows the bucket to be transported to the handrail using a crane or similar equipment. Since the lifting bracket 24 does not have a movable mechanism between it and the main body 2, it can be transported stably.

[0027] Figure 2 is a side view of the indirect work assistance device 1 shown in Figure 1. Here, a portion of the bucket's handrail B is shown in cross-sectional view.

[0028] The main body 2 has a handrail mounting portion 4 that is formed in an inverted U shape so that it can be attached to the handrail B from above. The mounting clamp 4a is positioned relative to the handrail mounting portion 4 so as to press against the inner surface of the handrail B of the bucket. The handrail mounting portion 4 is notched outwards to match the cross-sectional shape of the edge portion B1 that protrudes outwards at the upper end of the handrail B. Since the mounting clamp 4a is provided on the inside, when installed, the edge portion B1 of the handrail B fits into the notched recess. This prevents the handrail mounting portion 4 from falling off and ensures a stable installation.

[0029] As described above, the front-to-back sliding section 22 allows the components above the rotating section 18 to move back and forth as a single unit. This front-to-back sliding section 22 extends from the lifting section 20 towards the main body 2. As a result, when slid backward, the remote control rod held by the gripping section 16 can be operated at a position close to the top of the bucket's handrail B.

[0030] In Figure 2, as in Figure 1, the lifting guide section 8 is hidden inside the cover 20d of the lifting section 20, so only the position of the lifting guide section 8 is shown by a dotted line. The direction in which the lifting section 20 moves up and down, guided by this lifting guide section 8, is shown by the reference line L2, which is superimposed on the lifting section 20 in Figure 2. On the other hand, the reference line L1, superimposed on the bucket's handrail B, indicates the direction in which the vertical side wall of the handrail B expands (the in-plane direction of the side wall).

[0031] As can be seen in Figure 2, the operating rod fixing part 14 (see Figure 1) tilts in the direction of movement as it rises, moving closer to the inside of the bucket. In other words, the operating rod fixing part 14 rises diagonally upward while moving horizontally toward the inside of the bucket. In this way, in addition to the mechanism of the front and rear sliding part 22, the direction of movement is tilted, so even if the operating rod fixing part 14 is positioned on the outside of the bucket, the gripping part 16 can be brought closer to the worker on the inside of the bucket for operation. Furthermore, even when raised by the lifting mechanism, it moves horizontally toward the worker, so the center of gravity can be shifted toward the bucket side as the height increases, and the weight balance can be kept in a stable state.

[0032] In addition, the force associated with the lifting and lowering motion acts in a direction along the reference line L2. That is, the force along the reference line L2 is transmitted to the main body 2. This force along the reference line L2 includes not only the in-plane force component parallel to the reference line L1 of the handrail B, but also the out-of-plane force component perpendicular to the side wall of the handrail B. Therefore, during the lifting and lowering motion, a force acts in a direction that increases the clamping pressure of the mounting clamp 4a. In this way, the indirect work assistance device 1 according to this embodiment is configured to prevent "shifting" or "slipping" of the mounting clamp 4a during the lifting and lowering motion.

[0033] Figure 3 is a perspective view showing the internal structure of the indirect work assistance device 1. For ease of explanation, the configuration from the rotating part 18 (see Figure 1) upwards and the cover 20d of the lifting part 20 are removed. It is being done.

[0034] By removing the cover 20d, the configuration of the lifting guide section 8, which guides the lifting section 20 to move up and down, is revealed. The lifting guide section 8 has a plate-shaped base plate 8a, which is mounted to move horizontally relative to the horizontal guide section 6. A mechanism to support the lifting movement is arranged on the base plate 8a. Two horizontal brakes 10 are provided at the upper end of the base plate 8a, which can apply a brake to the horizontal guide rail 6a of the horizontal guide section 6. By using these horizontal brakes 10, the horizontal position can be locked and unlocked independently.

[0035] The lifting section 20 (see Figure 1), which is one of the components of the operating rod fixing section 14, has two sliding support columns 20c that connect the top plate 20a and the bottom plate 20b. These sliding support columns 20c are slidably guided by the four support column guides 8b1 and 8b2 of the lifting guide section 8. A brake mechanism is provided on the lower support column guide 8b2 side of the support column guides 8b1 and 8b2. The wire connecting fitting 12c, which is connected to the brake wire 12a extending from the brake release lever 12b attached to the gripping section 16 (see Figure 1) described above, is configured to be pulled up by the operation of the brake release lever 12b, thereby releasing the locked state of the sliding support column 20c relative to the support column guide 8b2.

[0036] The front and rear sliding section 22, which is provided on the top plate 20a of the lifting section 20, is equipped with front and rear brakes 22c, similar to the horizontal brake 10 described above. The front and rear sliding platform 22a can be slid along the front and rear guide rails 22b, and once a suitable working position is determined, the position can be fixed by turning the knobs of the front and rear brakes 22c.

[0037] Two gas springs 8p are provided within the lifting guide section 8 to bias the lifting section 20 upward. The indirect biasing force of these gas springs 8p reduces the load on the remote control rod and other components during upward movement, enabling smooth operation.

[0038] Next, the arrangement of the components of the lifting guide section 8 will be explained in detail using Figure 4.

[0039] Figure 4 is a perspective view showing the lifting section 20 (see Figure 1) and the lifting guide section 8 (see Figure 1) broken through the central longitudinal section. The fracture surface is indicated by diagonal lines. Also, for the sake of explanation, the structure above the top plate 20a (see Figure 3) and the gas spring 8p are excluded from the illustration.

[0040] A fixed pulley 8i is provided above the base plate 8a. Directly below the fixed pulley 8i is a movable pulley 8c (first movable pulley) connected by a belt 8j. The belt 8j extending from the fixed pulley 8i is wrapped around the lower part of the movable pulley 8c, folded back upwards, and fixed to a belt clamp 8m. The belt clamp 8m forms the fixed end of the movable pulley 8c. The movable pulley 8c is provided to be able to move up and down along a movable pulley guide rail 8f that extends vertically. The belt 8j wrapped around the upper part of the fixed pulley 8i (the free end side of the movable pulley 8c) is fixed to a movable pulley case 8e on the opposite side from the movable pulley 8c. A movable pulley 8d (second movable pulley) is provided inside this movable pulley case 8e. That is, the belt 8j is indirectly connected to the rotation axis 8dA of the movable pulley 8d via the movable pulley case 8e.

[0041] A belt 8k is wrapped around the movable pulley 8d from above, with one end fixed to a belt clamp 8n provided on the lower end of the base plate 8a, forming a fixed end (second fixed end). The other end of the belt 8k, which is the free end of the movable pulley 8d, is fixed to a belt clamp 20e (the target of the second free end) provided on the bottom plate 20b of the lifting section 20. This movable pulley 8d, like the movable pulley 8c, is provided to be able to move up and down along a movable pulley guide rail 8g provided in the vertical direction of the base plate 8a. Next, these lifting mechanisms are shown in a simplified schematic diagram. .

[0042] Figure 5 is a schematic front view of the lifting section 20 and the lifting guide section 8 (see Figure 3). The components shown in Figure 4 are arranged on a rectangular substrate 8a.

[0043] Two fixed pulleys 8i are provided above the center in the horizontal direction, and two movable pulleys 8c and 8d are connected to them by belts 8j wrapped around them from above. A gas spring 8p is positioned between the fixed pulleys 8i and the movable pulleys 8c.

[0044] With this configuration, when a downward force is applied to the lifting section 20, a force is transmitted from the bottom plate 20b through the belt 8k to pull down the movable pulley 8d. This pulls one end of the belt 8j wrapped around the fixed pulley 8i, and the movable pulley 8c is lifted. At this time, the movable pulley 8c is lifted against the biasing force acting in the extension direction by the gas spring 8p (see Figure 3). In other words, the biasing force generated by the gas spring 8p indirectly acts as a force that lifts the lifting section 20.

[0045] As schematically shown in Figure 5, in the configuration according to this embodiment, the gas spring 8p is positioned such that its extension and contraction direction is inclined with respect to the direction in which the movable pulley guide rail 8f extends.

[0046] With this configuration, as the gas spring 8p contracts, the angle of inclination of the gas spring 8p relative to the direction in which the movable pulley guide rail 8f extends increases. As this angle of inclination increases, the force component acting from the gas spring 8p on the movable pulley 8c that is aligned with the movable pulley guide rail 8f decreases. By adopting this configuration, inclined in the direction of expansion and contraction of the gas spring 8p relative to the direction in which the movable pulley guide rail 8f extends, the spring constant can be kept low, enabling smooth operation throughout the entire range of motion.

[0047] As mentioned above, the support column guide 8b2 is equipped with a brake mechanism. By operating the brake release lever 12b attached to the gripping section 16 (see Figure 2) as needed, the operator can easily perform fine positioning. These operations are shown in Figure 6.

[0048] Figure 6 is a schematic diagram showing the operation of the lifting section 20 and the lifting guide section 8 (see Figure 3). Here, the state in which the lifting section 20 has been lowered is shown. The gas spring 8p is compressed as the connected movable pulley 8c rises along the movable pulley guide rail 8f. As the movable pulley 8c rises, the belt 8j is sent towards the fixed pulley 8i by a length twice the distance the movable pulley 8c moves. Then, the belt 8j sent out via the fixed pulley 8i causes the movable pulley 8d, which is provided in another stage, to descend. Similar to the case of the movable pulley 8c, the belt 8k is sent towards the free end side (bottom plate 20b side) by a length twice the distance the movable pulley 8d moves along the movable pulley guide rail 8g.

[0049] In other words, the lifting section 20 is configured to perform a lifting motion with a stroke four times the travel distance of the movable pulley 8c. This configuration allows for a compact design of the biasing mechanism, resulting in a lighter weight. Therefore, sufficient working space can be secured within the limited area inside the bucket.

[0050] <First variation> Figure 7 is a schematic diagram showing a first modified example of the lifting section 20 and the lifting guide section 8.

[0051] The connection configuration of the movable pulley 8c and the fixed pulley 8i is the same as that shown in Figure 5. However, it differs from the configuration in Figure 5 in that the movable pulley 8d is not used, and the movable part consists of only one stage of the movable pulley 8c.

[0052] In the configuration shown in Figure 6, the lifting section 20 had a stroke four times that of the movable pulley 8c via the movable pulleys 8c and 8d. However, in the example shown in Figure 7, where the movable pulley 8c is configured in a single stage, the stroke of the lifting section 20 is limited to twice the amount of movement of the movable pulley 8c.

[0053] When the lifting range is relatively small, the system can be constructed using only one stage of movable pulleys to reduce weight, depending on the application. Here, a belt 8k1 is shown as a member connecting the bottom plate 20b of the lifting section 20 and the fixed pulley 8i. In this first modified example, a configuration equivalent to the movable pulley 8d is not necessary, so a rigid member can be selected as a substitute for the belt 8k1.

[0054] <Second variation> Figure 8 is a schematic diagram showing a second modified example of the lifting section 20 and the lifting guide section 8. This second modified example is similar to the configuration in Figure 5 in that it uses two movable pulleys 8c and 8d in combination, but differs in that the movable pulley 8c1, which corresponds to the movable pulley 8c in Figure 5, is installed upside down, and a fixed pulley 8i is not used.

[0055] In other words, the movable pulley 8c1 in the second modified example is arranged to slide vertically along the movable pulley guide rail 8f1 and is biased upward by a gas spring 8p. With this configuration, two fixed pulleys 8i are unnecessary compared to the configuration in Figure 5, resulting in a lighter design.

[0056] Furthermore, the configuration in which the fixed end of the belt 8j, which is a winding member that is wrapped around the movable pulley 8c1, is provided on the base plate 8a, and the free end is biased by a gas spring 8p to pull up the lifting portion 20 of the operating rod fixing portion 14 (see Figure 1), is the same as the configuration in Figure 5.

[0057] The present invention is not limited to the configurations described above, and also includes the following modifications.

[0058] (1) In the above embodiment, a configuration in which a lifting brake 12 for locking the lifting section 20 of the operating rod fixing section 14 against the lifting guide section 8 is provided for each of the left and right sliding support columns 20c is shown as an example. However, the same effect can be obtained if it is provided on at least one of them. Furthermore, the lifting brake 12 may be provided on a component within the lifting guide section 8 other than the support column guide 8b2, as long as it can be locked against the lifting guide section 8.

[0059] (2) In the above embodiment, a configuration in which the lifting guide section 8 is located on the outside of the bucket was shown as an example. However, if there is sufficient space, the lifting guide section 8 may be located on the inside of the bucket.

[0060] (3) In the above embodiment, a configuration in which the operating rod fixing part 14 includes a gripping part 16, a rotating part 18, and a lifting part 20 was shown as an example. However, it is not necessary to include all of the gripping part 16, rotating part 18, and lifting part 20, as long as it has a structure for fixing the remote control rod and a mechanism that can move up and down relative to the lifting guide part 8. Furthermore, a configuration using a remote control rod fixing means other than a gripping mechanism is also acceptable.

[0061] (4) In the above embodiment, the direction of extension and contraction of the gas spring 8p is slightly inclined with respect to the direction in which the movable pulley guide rail 8f extends, which slidably supports the movable pulley 8c. An example of this configuration is shown. However, it is also acceptable to install them parallel without tilting. As mentioned above, a larger tilt angle can reduce the spring constant, but if a smooth operation can be sufficiently obtained with the characteristics of a gas spring with a relatively small spring constant, the movable pulley guide rail 8f and the gas spring 8p may be arranged to overlap.

[0062] (5) In the above embodiment, a configuration in which the gas spring 8p is arranged to span between the movable pulley 8c and the fixed pulley 8i was shown as an example. However, the fixed pulley 8i may be connected to other configurations as long as it is integrated with the base plate 8a. For example, it may be directly fixed to the base plate 8a. [Explanation of symbols]

[0063] 1 Indirect work aid device 2 Main unit 4. Handrail mounting section 4a Mounting clamp 6 Horizontal guide section 6a, 6b Horizontal guide rails 8 Lifting guide section 8a substrate 8b1, 8b2 Support Guide 8c, 8c1 Moving pulley (1st moving pulley) 8d Moving pulley (2nd moving pulley) 8dA rotation axis 8e Movable Pulley Case 8f, 8f1, 8g Movable Pulley Guide Rail 8h stopper 8i fixed pulley 8j belt (wrapping component) 8k, 8k1 belt (second winding component) 8m Belt Clamp (Fixed End) 8n Belt clamp (second fixed end) 8p Gas spring (biasing means) 10 Horizontal brake 12. Lifting brake 12a Brake cable 12b Brake release lever 12c Wire Connector 14 Operation rod fixing part 16 Gripping part 18 Rotating part 20 Lifting section 20a Top plate 20b bottom plate 20c sliding support 20d cover 20e Belt clamp (for fixing the second free end) 22 Front and rear sliding section 22a Front and rear sliding stand 22b Front and rear guide rails 22c front and rear brakes 24 Hanging hardware 100 Fixation device 101 Clamp 102 Ball joint 200 Helpers 201 Horizontal drive unit 202 Vertical drive unit 203 Footswitch 204 Mobile Unit 205 Support column B Bucket Handrail B1 Edge L1 Handrail reference line L2 Reference line in the upward / downward direction S Remote Control Rod

Claims

1. An indirect work assistance device that is attached to the handrail of the bucket of an aerial work platform and supports a remote control rod in an adjustable position, An operating rod fixing part for fixing the aforementioned remote control rod, A lifting guide section that supports the operating rod fixing section so that it can move up and down so that it rises while moving horizontally inward from the bucket, The main body has a horizontal guide portion that supports the lifting guide portion so as to be movable in the horizontal direction along the handrail, and a handrail mounting portion that is positioned to hang on the upper end of the handrail and is attached by clamping the vertical portion of the handrail. Equipped with, The lifting guide section includes a biasing means for biasing the operating rod fixing section upward, A locking mechanism that can lock the operating rod fixing part at any lifting position, A winding member having a fixed end within the lifting guide section and a free end connected to the operating rod fixing section, A movable pulley around which the winding member is wound, and the free end is biased by the biasing means to pull up the operating rod fixing portion. An indirect work assistance device characterized by being equipped with the following features.

2. The aforementioned lifting guide section is A second winding member having a second fixed end within the lifting guide section and a second free end connected to the operating rod fixing section, The second movable pulley has a free end connected to a rotating shaft, and the second winding member is wrapped around the second free end such that the biasing force of the biasing means transmitted through the free end pulls up the operating rod fixing part. The indirect work assistance device according to claim 1, characterized by comprising the above.

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