JP2020079140A - Indirect live line tool support device for high-place work vehicle - Google Patents

Abstract

To provide an indirect live line tool support device for a high-place work vehicle, which can improve work efficiency of indirect live line work.SOLUTION: A hot stick support device 100 grips a handle 204 of a hot stick 200 between a fixed side gripping tool 175 and a movable side gripping tool 177 in a state where a spacer 178 is set to a storage attitude when the diameter of the handle 204 of the hot stick 200 is a relatively large first diameter, and grips the handle 204 of the hot stick 200 with the spacer 178 being placed between the fixed side gripping tool 175 and the movable side gripping tool 177 in a state where the spacer 178 is set to a development attitude when the diameter of the handle 204 of the hot stick 200 is a second diameter smaller than the first diameter.SELECTED DRAWING: Figure 15

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indirect hot-line tool supporting device for an aerial work vehicle that supports a tool for indirect live-wiring such as a hot stick.

  An aerial work vehicle is generally constructed by having a work platform for a worker on the tip of a telescopic boom provided on a vehicle body based on a truck vehicle so as to be able to move up and down, extend and retract, and turn. By operating an operating device provided on the workbench, an operator on the workbench can operate the telescopic boom to move the workbench to a desired high position to perform work. It is widely used for indirect live construction of overhead lines.

  In indirect live work, wires are generally operated in an uninterrupted state (live line), so an attachment such as a wire gripping tool is attached to the tip to perform the work indirectly (remotely). An indirect hot-line tool called a hot stick is used. An operator who carries out indirect live work on a workbench directly touches a live wire by performing work such as stripping the wire sheath and cutting or connecting the wire using this hot stick. You can work without it. However, in the work using this hot stick, the labor of the worker who works while supporting the hot stick is large and the workability is poor. For this reason, a hot stick support device for detachably supporting the hot stick is installed on the workbench of the aerial work vehicle, and the hot stick supported by the hot stick support device is operated by the worker to indirectly perform the operation. A construction method for performing line work has been proposed (for example, see Patent Document 1).

JP, 10-218588, A

  However, in the above-mentioned conventional hot stick supporting device, since the hot stick holder has to be manufactured according to the diameter of the handle portion of the hot stick, different kinds of hot sticks (hot sticks having different handle diameters) are used. In this case, the hot stick holder has to be replaced, and since the upper and lower gripping members of the hot stick holder are fixed with screws, there is a problem that the workability of attaching and detaching the hot stick is poor.

  The present invention has been made in view of such a problem, and accurately grasps regardless of the size of the gripped portion of the indirect live-wire tool, and improves the workability of attaching and detaching the indirect live-wire tool. It is an object of the present invention to provide an indirect live-line tool support device for an aerial work vehicle that can be used.

In order to solve the above problems, an indirect live-line tool supporting device for an aerial work vehicle according to the present invention includes a boom provided at least in a vehicle body so that it can be moved up and down, and a work platform provided at the tip of the boom. In an aerial work vehicle equipped with the work table, a base member provided at an upper edge portion of the work table, an arm member swingably provided on the base member, and an indirect live line provided at a tip end portion of the arm member. A gripping device for gripping a tool, wherein the gripping device includes a holder base fixed to a tip end portion of the arm member, a first support member provided on the holder base and having a first gripping portion, A second supporting member having a second gripping part for gripping the indirect live-power tool with the first gripping part, and between the first gripping part and the second gripping part provided on the first supporting member. An indirect hot-line tool, comprising a spacer member that changes its posture between a deployed posture in which it enters and a retracted posture that retracts from between the first grip portion and the second grip portion and is stored in the first support member. When the diameter of the gripped portion is the first diameter, the spacer member is placed in the retracted posture to grip the gripped portion of the indirect live-wire tool between the first gripping portion and the second gripping portion, When the diameter of the gripped portion of the indirect hot-line tool is the second diameter smaller than the first diameter, the spacer member is placed in the unfolded position and the space between the first gripping portion and the second gripping portion is set. It is characterized in that the portion to be grasped of the indirect hot-line tool is grasped with the spacer member interposed.

  In addition, in the indirect live-wire tool supporting device for an aerial work vehicle configured as described above, the spacer member is a spacer body that is interposed between the first grip portion and the second grip portion, and is integrated with the spacer body. It is preferable that it is configured to include a connecting portion formed and connected to the first supporting member.

  According to the indirect live wire tool supporting device for an aerial work vehicle according to the present invention, the predetermined thickness connected to the first supporting member of the gripping device is determined according to the diameter of the gripped portion of the indirect live wire tool (hot stick). By selectively using the above spacer member, the gap (grasping interval) between the first gripping portion and the second gripping portion is always substantially constant regardless of the diameter of the gripped portion of the indirect hot-line tool. , For example, it is possible to easily and firmly fix the gripped part of the indirect hot-line tool by using a tool-less lock mechanism such as a patch lock or snap lock, and it is possible to improve the operability of attaching and detaching the indirect live-line tool. Becomes

It is a side view of an aerial work vehicle according to the present embodiment. It is a block diagram which shows the operating mechanism in an aerial work vehicle. It is the perspective view which looked at the worktable to which the hot stick support device was attached from the left. It is the perspective view which looked at the worktable to which the hot stick support device was attached from the right side. It is a perspective view which shows the work stand to which the gantry unit was attached. It is sectional drawing which shows the work stand to which the gantry unit was attached. It is a side view of a gantry unit. It is a perspective view showing a slide turning mechanism of the arm unit. It is a rear view showing a slide turning mechanism of the arm unit. It is sectional drawing which shows the slide turning mechanism of an arm unit. It is a side view which shows the slide turning mechanism of an arm unit. It is a perspective view which shows a movable arm. It is a perspective view which shows the holder member of a movable arm. It is a rear view which shows the state which hold|gripped the hot stick with the holding tool of a holder member. It is a rear view which shows the state which hold|maintained the hot stick by interposing a spacer in the holding tool of a holder member. It is sectional drawing which shows an upper part brake device. It is a side view which shows the internal structure of an upper brake device. It is a side view which shows the external structure of an upper brake device.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. An aerial work vehicle 1 according to this embodiment is shown in FIG. 1. First, the overall configuration of the aerial work vehicle 1 will be described with reference to these drawings.

  The aerial work vehicle 1 has a driving cab 7 in the front part of the vehicle body 2, and is constructed on the basis of a truck-type vehicle that can travel by a pair of left and right front wheels 5f and rear wheels 5r arranged in front of and behind the vehicle body 2. There is. The vehicle body 2 is configured to include a vehicle body frame including a chassis frame on which front wheels 5f and rear wheels 5r are arranged, and a subframe mounted on the chassis frame.

  Jack devices 10 for raising and supporting the vehicle body 2 during high-altitude work are provided on the front, rear, left and right sides of the vehicle body 2. The jack device 10 includes a pair of left and right front jacks 10f arranged behind the front wheels 5f and a pair of left and right rear jacks 10r arranged behind the rear wheels 5r. Each of the jacks 10f and 10r drives the jack cylinder 11 provided therein to extend downward to lift and support the vehicle body 2, thereby stabilizing the entire vehicle. The vehicle body 2 is provided with a jack operating device 15 (see FIG. 2) for operating the jacks 10f and 10r.

  In a bodywork area behind the driving cab 7 of the vehicle body 2, a revolving base 20 is provided which is driven by a revolving motor 24 and is horizontally rotatable about a vertical axis. A base end portion of a boom 30 is attached to a column 21 extending upward from the swivel base 20 via a foot pin 22 so as to be swingable in an up-and-down direction (movable up and down). Further, on the left and right of the bodywork area of the vehicle body 2, there are provided tool boxes 26 for storing work tools and work equipment.

  The boom 30 has a configuration in which a base end boom 30a, an intermediate boom 30b, and a tip boom 30c are combined in a nesting manner in this order from the swivel base 20 side, and the telescopic cylinder 31 provided inside the boom 30 telescopically drives the boom 30 to extend and retract. The boom 30 can be expanded and contracted in the axial direction (longitudinal direction). A hoisting cylinder 23 is laid between the base boom 30a and the column 21, and the hoisting cylinder 23 is driven to expand and contract to hoist the entire boom 30 in a vertical plane. be able to.

  A vertical post (not shown) is swingably supported in the vertical direction at the tip of the tip boom 30c. The vertical post is swing-controlled by a leveling device (not shown) provided between the vertical post and the tip boom 30c, and the vertical post is always held in a vertical posture regardless of the ups and downs of the boom 30. It is configured to. A workbench 40 for mounting a worker is attached to the vertical post via a workbench bracket (not shown). A swinging motor 41 (see FIG. 2) is provided inside the worktable bracket. By driving the swinging motor 41, the entire workbench 40 swings around a vertical post (horizontal swinging). Can be moved. Here, since the vertical post is always kept in the vertical posture as described above, as a result, the floor surface of the workbench 40 is always kept horizontal regardless of the hoisting angle of the boom 30.

  The workbench 40 is provided with a work operation device (upper operation device) 45 including various operation means such as an operation lever, an operation switch, and an operation dial operated by an operator on the workbench 40. Therefore, the operator who has boarded the workbench 40 operates the work operation device 45 to rotate the swivel base 20 (rotate the swivel motor 24) and lift the boom 30 (expand and retract the cylinder 23). It is possible to perform various operation operations such as expansion/contraction operation of the boom 30 (expansion/contraction operation of the expansion/contraction cylinder 31) and swinging operation of the work table 40 (rotating operation of the swinging motor 41). Although not shown, the vehicle body 2 is also provided with a work operation device (lower operation device) so that an operator on the ground or on the vehicle body 2 can perform the above-described operation operation. Further, a hot stick support device 100 that supports an indirect hot-line tool (hot stick 200) is detachably attached to the workbench 40 (see FIG. 3 and the like).

A jack device 10 and an aerial work device provided on the vehicle body 2 (the swivel base 20, the boom 3 described above).
2, the operating mechanism of the workbench 40, etc., as shown in FIG. 23, a telescopic cylinder 31, a swinging motor 41 (hereinafter, collectively referred to as "hydraulic actuator 55"), a hydraulic unit 60 for supplying hydraulic oil, and a working battery 65 for storing DC power. Is configured.

  The hydraulic unit 60 includes a pump drive motor 61 that receives electric power (AC power) supplied from the work battery 65 via the inverter 64 and drives the hydraulic unit 60, and a hydraulic pump that is driven by the pump drive motor 61 to discharge hydraulic oil. 62, a control valve 63 provided corresponding to each of the hydraulic actuators 55, and an oil tank T that stores hydraulic oil. The hydraulic oil stored in the oil tank T is sucked up by the hydraulic pump 62 and supplied to the control valve 63. The control valve 63 supplies hydraulic fluid supplied from the hydraulic pump 62 to each hydraulic actuator 55 in response to a control signal from the controller 50 (a control signal corresponding to an operation signal from the jack operating device 15 and the work operating device 45). The direction and the supply amount are controlled, and the operation direction and the operation speed of each hydraulic actuator 55 are controlled (the operation direction and the operation speed of the jack device 10 and the aerial work device are controlled).

  Next, the hot stick support device 100 to which the indirect live-wire tool support device according to the present embodiment is applied will be described with reference to FIGS. 3 to 18. The hot stick support device 100 includes a gantry unit 110 as a base member that is detachably attached to the workbench 40, and an arm unit 140 that is attached to the gantry unit 110 and supports the hot stick 200. Note that, for convenience of description, the front-rear, left-right, and up-down arrow directions shown in the drawing are referred to as front-rear direction, left-right direction, and up-down direction with reference to the arrangement posture of the hot stick support device 100 shown in FIGS. The name will be described.

  As shown in FIGS. 3 to 6, the workbench 40 includes a workbench main body 42 formed in a bottomed container shape, and a liner 43 that covers the inside of the workbench main body 42 and is internally provided. Has been done. The worktable body 42 and the liner 43 are both made of an insulating material. The workbench main body 42 and the liner 43 have side wall portions 42a and 43a surrounding the four sides thereof, and upper ends of the side wall portions 42a and 43a are flange portions 42b and 43b that open outward and extend in the horizontal direction. There is. A liner protector 44 having a semi-cylindrical cross section is attached to the collar portion 43b of the liner 43.

  The gantry unit 110 is configured to include a support frame 111 that is provided to extend inside and outside the work table 40, and a gantry rail 130 that is fixed to an upper portion of the support frame 111 and holds the arm unit 140.

  The support frame 111 is provided with a pair of main frames 112 that are bent and formed in a vertically long U-shape, a pair of subframes 113 that connect the pair of main frames 112, and a gantry unit that is provided in each main frame 112. An attachment/detachment device 120 for fixing 110 to the workbench 40 is provided.

  The main frame 112 includes an outer frame portion 112a arranged outside the workbench 40 and extending in the up-down direction, an inner frame portion 112b arranged inside the workbench 40 and extending in the up-down direction, an outer frame portion 112a and an inner frame. The upper part of the part 112b is connected to the upper part of the liner protector 44 and the intermediate frame part 112c is provided. A fixing piece 112d having a U-shaped cross section is provided below the outer frame portion 112a. A stud bolt 114 extending in the front-rear direction is fastened to the fixing piece 112d, and a synthetic rubber pressing pad 116 abutting the outer peripheral surface of the workbench 40 (side wall portion 42a) is attached to the tip end of the stud bolt 114. Is attached.

  The attachment/detachment device 120 includes four toggle clamp mechanisms 121 attached to the inner frame portion 112b. In the four toggle clamp mechanisms 121, the upper two toggle clamp mechanisms 121 and the lower two toggle clamp mechanisms 121 are attached in the upside down orientation (upside-down postures).

  As shown in FIG. 7, the toggle clamp mechanism 121 includes a stay 122 fixed to the bracket plate 112e of the inner frame portion 112b, a clamp arm 123 pivotally connected to one end of the stay 122, and the other end of the stay 122. The auxiliary link 124 pivotally connected to the clamp arm 123, the clamp arm 123 and the clamp lever 125 pivotally connected to the auxiliary link 124 to operate the clamp arm 123, and the stopper arm 126 for locking the clamp lever 125 to the stay 122. And is configured. Since such a toggle clamp mechanism 121 is a known clamp device using a toggle mechanism (power boosting function), detailed description of the structure will be omitted except for special cases. A rod 127 extending in a direction substantially orthogonal to the clamp arm 123 is screwed to the tip of the clamp arm 123, and a clamp pad 128 made of synthetic rubber is attached to the tip of the rod 127.

  The gantry rail 130 is formed in a horizontally long rectangular box shape extending in the left-right direction, is joined to the upper ends of the pair of main frames 112, and is horizontally disposed above the liner protector 44. The gantry rail 130 includes a bottom plate portion 131 extending in a horizontal plane, a pair of side plate portions 132 extending upward from front and rear edges of the bottom plate portion 131, and a pair of inwardly projecting ends of the side plate portions 132. And a folded-back plate portion 133, and a rail groove 134 having a rectangular cross section that is surrounded by these and extends along the longitudinal direction (left-right direction) of the gantry rail 130 is defined. A slider 141, which will be described later, is attached to the rail groove 134 so as to be capable of reciprocating (sliding). An upper surface opening 134a of the rail groove 134 is formed between the pair of folding plate portions 133. Further, elongated plate-shaped cap plates 135 are detachably attached to the left and right open ends 134b of the rail groove 134. The cap plate 135 closes the left and right open ends 134b of the rail groove 135, and functions as a stopper to prevent the slider 141 from falling off from the open ends 134b.

  In the gantry unit 110 having such a configuration, when the clamp lever 124 of the toggle clamp mechanism 120 is pushed down, the clamp arm 123 swings in the locking direction and the clamp pad 128 abuts the inner surface of the workbench 40 (side wall portion 43a). By pressing with pressing, the entire gantry unit 110 is locked and fixed to the workbench 40 with the side wall portions 42a and 43a sandwiched between the clamp pad 128 and the pressing pad 116. On the other hand, by pushing up the clamp lever 124 of the toggle clamp mechanism 120, the clamp arm 123 swings in the unlocking direction and the clamp pad 128 separates from the side wall portion 43a, so that the pedestal unit 110 is unlocked. ..

  The arm unit 140 includes a slider 141 mounted in the rail groove 134 of the gantry rail 130, a swing plate 147 horizontally swingably mounted on the slider 141, and a column 148 standing on the swing plate 147 and extending vertically. And a movable arm 160 that is attached to the upper end of the column 148 and supports the hot stick 200.

The slider 141 is formed of a flat metal plate in the shape of a rectangular box with an open upper surface, and is accommodated slidably left and right along the rail groove 134 of the gantry rail 130. A total of four slide rollers 142 are mounted on both side surfaces 141a of the slider 141 so as to be rotatable about a horizontal axis. The slide rollers 142 roll on the bottom surface of the rail groove 134, so that the slider 141 moves to the left and right. It is designed to slide in the direction. On the bottom surface portion 141b of the slider 141, an arcuate groove 141c in the shape of a long hole, through which clamp pads 158 and 159 to be described later can be inserted, is vertically formed. The arcuate groove 141c is bent and formed along the turning locus of the clamp pads 158 and 159, and the clamp pads 158 and 159 can be vertically inserted regardless of the turning positions of the clamp pads 158 and 159. Further, on the bottom surface portion 141b of the slider 141, a swivel support member 143 that supports the swivel plate 147 so that it can horizontally swivel is attached.

  The swivel support member 143 includes a lower support plate 144 mounted on the bottom surface 141b of the slider 141, and a pair of upper support plates 145 mounted on the upper surface of the lower support plate 144. , 145 are vertically stacked and fastened and fixed to the slider 141 by a plurality of bolts 146a and nuts 146b. The lower support plate 144 has a circular cross section, which is formed in a circular shape and guides the swivel motion of the swivel plate 147, and a pair of circular guide sections which are continuously provided below the swivel guide groove 144a and have an arcuate cross section. The escape groove 144b is formed so as to penetrate vertically. The pair of upper support plates 145 are formed in a substantially semicircular arc shape, and are arranged so as to face each other so that inner peripheral surfaces thereof are combined to form a circumferential surface. An insertion space 145a having a substantially circular cross section is formed between the pair of upper support plates 145, and the lower part of the support column 148 is inserted therethrough. The upper support plate 145 functions as a retainer for the swivel plate 147 fitted into the swivel guide groove 144a of the lower support plate 146.

  Of the outer peripheral surface of the swirl plate 147, both side surfaces in one direction are formed into flat surfaces, and both side surfaces in the other direction are formed into an arcuate surface substantially aligned with the inner peripheral surface of the swivel guide groove 144a. It is formed in an oval shape. The swivel plate 147 is horizontally rotatably mounted in the swivel guide groove 144a while being sandwiched between the support plates 144 and 145. The arcuate surface portions (both side surfaces in the other direction) of the swivel plate 147 are always fitted to the inner peripheral surface of the swirl guide groove 144a in a slidable state without rattling. The turning movement of 147 is smoothly guided along the inner peripheral surface of the turning guide groove 144a.

  The column 148 is vertically fixed to the upper surface of the swivel plate 147 and is configured to be horizontally swivel integrally with the swivel plate 147. The pillar 148 includes a cylindrical pillar main body 148a extending in the vertical direction, and an arm base 148b provided at the upper end of the pillar main body 148a. A lower brake device 150 that brakes the sliding operation of the slider 141 and the horizontal turning operation of the turning plate 147 at substantially the same time is attached to the column main body 148a. The arm base portion 148b is formed in a substantially cylindrical shape, and a first swing shaft 149 (see FIG. 8 and the like) that swingably supports the movable arm 160 (first arm 161) at the axial center position thereof. Are extended and fixed in the horizontal direction.

  The lower brake device 150 is provided with a toggle clamp mechanism 151 attached to the support column 148, a connecting plate 156 that moves up and down in conjunction with the toggle clamp mechanism 151, and is provided at both ends of the connecting plate 156 and moves up and down together with the connecting plate 156. It is configured to include a pair of clamp pads 158 and 159.

The toggle clamp mechanism 151 includes a pair of stays 152 having an L-shaped cross section, which are fastened to a bracket plate 148c joined to a side surface of the column main body 148a by bolts 152a and nuts 152b, and a clamp arm 153 which holds a connecting plate 156. A clamp lever 154 pivotally connected to the stay 152 and a link mechanism 155 that swings the clamp arm 153 according to an operation of the clamp lever 154 are configured. As shown in FIG. 11, the link mechanism 155 includes a first link 155a and a second link 155b. One end in the longitudinal direction of the first link 155a is pivotally connected to the stay 152, and the other end in the longitudinal direction is pivotally connected to the clamp lever 154. The second link 155b has one longitudinal end pivotally connected to the clamp arm 153 and the other longitudinal end pivotally connected to the clamp lever 154. The lower end of the first link 155a and the upper end of the second link 155b are connected to each other via the pivotal connection point with the clamp lever 154 (a pin inserted into an elongated hole of the clamp lever 154) so as to be relatively swingable. . A flat plate-like connecting plate 156 is attached to the tip of the clamp arm 153. Since such a toggle clamp mechanism 151 is a known clamp device using a toggle mechanism (power boosting function), detailed description of the structure will be omitted except for special cases.

  A first clamp pad 158 and a second clamp pad 159 made of synthetic rubber are provided at both ends of the connecting plate 156 via a pair of vertically extending adjustment screws 157. The first clamp pad 158 is arranged on one side in the lateral direction of the swivel plate 147 in a plan view, and the second clamp pad 159 is arranged on the other side in the lateral direction of the swivel plate 147 in a plan view. The clamp pads 158 and 159 are fixed to the lower ends of the adjustment screws 157. The vertical position of the clamp pads 158 and 159 can be arbitrarily adjusted by adjusting the protruding length of the adjusting screw 157 with respect to the connecting plate 156. The clamp pads 158 and 159 can be vertically inserted into the swivel guide groove 144a, the escape groove 144b, and the circular arc groove 141c of the slider 141 of the swivel support member 143.

  In such a lower brake device 150, when the clamp lever 154 of the toggle clamp mechanism 151 is pushed up, the link plate 156 moves downward due to the extension operation of the link mechanism 155, and the pair of clamp pads 158 and 159 cause the pedestal rail 130 to move. The bottom plate portion 131 is pressed and abutted. As a result, the slider 141 is pushed up, and each slide roller 142 is pressed against the upper end surface (folding plate portion 133) of the gantry rail 130, whereby the rolling of the slide roller 142 is regulated and the sliding movement of the slider 141 is performed. Is braked. Further, the clamp pads 158 and 159 are respectively arranged near both sides in the lateral direction of the swivel plate 147 (disposed on the swirl locus of the swivel plate 147), so that the swivel plate 147 brakes the horizontal swivel in both directions. .. At this time, since the pivotal connection points (three pivotal connection points) of the links 155a and 155b are aligned on a substantially straight line, even if a force acts in the direction of pushing the clamp pads 158 and 159 (lock release direction), the locked state Is maintained. On the other hand, when the clamp lever 154 of the toggle clamp mechanism 151 is pushed down, the link plate 156 moves upward due to the bending operation of the link mechanism 155, and the pair of clamp pads 158 and 159 separate from the bottom plate portion 131 of the gantry rail 130. Thus, the locked state of the slider 141 and the swivel plate 147 is released.

  As shown in FIG. 12, the movable arm 160 includes a first arm 161 swingably provided on an upper end portion of a column 148, a second arm 162 swingably provided on the first arm 161, and a second arm 162. A two-arm 162 is provided with a holder (hot stick holder) 170 that is swingably provided, and these holders have three axes of a first joint K1, a second joint K2, and a third joint K3, which are sequentially connected in series. It constitutes an articulated arm mechanism. In the following description, the ends of the arms 161, 162 on the side closer to the workbench 40 with respect to the longitudinal direction are referred to as “proximal ends”, and the workbench with respect to the longitudinal direction of the arms 161 and 162. The end farthest from 40 is called the "tip".

  The first arm 161 is formed on a first arm body 161a having a long shape, a first arm base end portion 161b formed on the base end side of the first arm body 161a, and a tip end side of the first arm body 161a. And a first arm tip portion 161c. The first arm base end portion 161b is pivotally connected to the first swing shaft 149 of the arm base portion 148b provided at the upper end portion of the support column 148, and the first arm base end portion 161b and the first swing shaft 161b. The first joint K1 of the movable arm 160 is constituted by 149. Accordingly, the first arm 161 is configured to be vertically swingable about the first joint K1 (first swing shaft 149). An upper brake device 190 that brakes the swing of the first arm 161 is attached to the right side surface of the first arm base end portion 161b.

The second arm 162 includes a second arm body 162a having an elongated shape and a second arm body 162a.
A second arm base end portion 162b formed on the base end side and a second arm tip end portion 162c formed on the front end side of the second arm body 162a. A second swing shaft 163 (see FIG. 16) extending in the horizontal direction is fixed to the second arm base end portion 162b. A first arm tip portion 161c is pivotally connected to the second swing shaft 163, and the first arm tip portion 161c and the second swing shaft 163 form a second joint K2 of the movable arm 160. ing. Thereby, the second arm 162 is configured to be vertically swingable about the second joint K2 (second swing shaft 163). An upper brake device 190 that brakes the swing of the second arm 162 is attached to the right side surface of the second arm base end portion 162b.

  As shown in FIGS. 13 to 16, the holder 170 is a vertical plate-shaped holder base 171 that is swingably connected to the second arm tip portion 162c, and is fixed to the upper end portion of the holder base 171 to be the hot stick 200. The holder main body member 173 that holds the hot stick 200 and the spacer 178 that is attached to the holder main body member 173 and is used as an auxiliary when holding the hot stick 200 are configured.

  As shown in FIGS. 3 and 4, the hot stick 200 includes a long insulating rod (also referred to as “insulation operating rod”) 201 and an object such as an electric wire which is provided at the tip of the insulating rod 201. A gripping claw 202 for gripping and an operating lever 203 provided at an intermediate portion of the insulating rod 201 for opening and closing the gripping claw 202 are configured. On the base end side of the insulating rod 201, a handle portion 204 that is a portion to be gripped by the holder 170 of the movable arm 160 is provided. The hot stick 200 can open and close the grip claws 202 to grip an object by swinging an operation lever 203 provided below the insulating rod 201 in the vertical direction.

  The holder base 171 is formed to extend in a vertical plane, and a third swing shaft 172 extending in the horizontal direction is fixed to the substantially center thereof. A second arm tip portion 162c is pivotally connected to the third swing shaft 172 of the holder base 171, and the third joint K3 of the movable arm 160 is formed by the second arm tip portion 162c and the third swing shaft 172. Is configured. Accordingly, the holder 170 is configured to be vertically swingable about the third joint K3 (third swing shaft 172). A lower brake device 190 that brakes the swing of the holder 170 is attached to the right side surface of the second arm tip portion 162c.

  The holder main body member 173 has a fixed support plate 174 having a U-shaped cross section joined to the upper end portion of the holder base 171, and an L-shaped cross section connected to the fixed support plate 174 so as to be vertically swingable (openable and closable). And a movable support plate 176 having a shape of a circle. A fixed-side gripping tool 175 having a V-shaped groove 175a that expands outward is fixed to the fixed support plate 174. To the movable support plate 176, a movable-side gripping tool 177 having a V-shaped groove 177a that expands outward is fixed. The movable support plate 176 closes the upper end opening of the fixed support plate 174 via a hinge mechanism 173a that is provided so as to extend between the movable support plate 174 and the fixed support plate 174, and the V-shaped grooves 175a and 177a of the grippers 175 and 177. A holding position where the hot stick 200 is held by vertically facing each other, and a non-holding position where the hot stick 200 is attached and detached by opening the upper end opening of the fixed support plate 174 to separate the holding tools 175 and 177. It is attached so that it can be swung and displaced (openable and closable). A lock mechanism (turn catch clip) 173b for locking the movable support plate 176 to the fixed support plate 174 detachably is attached to the left side surfaces of both the support plates 174 and 176.

The spacer 178 is formed of an elastic member (plate rubber) having a predetermined thickness. The spacer 178 has a spacer main body 178a that can be inserted between the grips 175 and 177, and a pair of connecting arm portions 178b that protrudes rightward from the end of the spacer main body 178a. The spacer body 178a is inserted between the fixed-side gripping tool 175 and the movable-side gripping tool 177 according to the diameter of the handle portion 204 of the hot stick 200, and the space between the V-shaped grooves 175a and 177a is increased by the thickness thereof. It functions as a spacer that reduces (absorbs) the gap. Each connecting arm portion 178b is inserted into a rectangular hole 174a penetrating the right side wall of the fixed support plate 174, and is movable along this insertion direction (left-right direction). A locking portion 178c (see FIG. 12) for retaining is integrally formed at the end of each connecting arm portion 178b.

  The spacer 178 has a deployed posture in which the spacer 178 is displaced to the left so that the spacer body 178a is inserted between the grippers 175 and 177, and the spacer 178 is displaced to the right so that the spacer body 178a is The posture can be changed between the storage postures stored outside the grippers 175 and 177. The spacer 178 is selectively (auxiliarily) used according to the diameter of the handle portion 204 of the hot stick 200 used for the indirect live work. Specifically, as shown in FIG. 14, when the diameter of the handle portion 204 is the first diameter (for example, 32 mm), the handle portion 204 is held between the gripping portions 175, 177 with the spacer 178 in the retracted posture. Hold it. On the other hand, as shown in FIG. 15, in the case where the diameter of the handle portion 204 is the second diameter (for example, 26 mm), the spacer 178 is in the unfolded position and the spacer 178 is interposed between the grip portions 175 and 177. The handle portion 204 is gripped with. When the spacer 178 is in the retracted posture, the spacer body 178a is stored in the storage space 173c formed between the grippers 175, 177 and the fixed support plate 174.

  As shown in FIGS. 13 to 15, on the right side surface of the fixed support plate 174, as an operation mechanism of the upper brake device 190, a brake lever 181 extending forward, and a brake lever 181 corresponding to the operation of the brake lever 181 are operated. A wire case 185 that movably supports the three brake wires 188 is attached. The brake lever 181 is pivotally connected to a bracket 182 provided on the right side surface of the fixed support plate 174 and is configured to be swingable in a horizontal direction (substantially right and left direction). The brake lever 181 is always biased by a coil spring (not shown) and is held at a position where it is rocked and displaced to the right (direction in which the brake is applied). A round bar-shaped grip portion 183 (see FIG. 13) extending in parallel with the longitudinal direction of the hot stick 200 is joined to the left side surface of the fixed support plate 174. The grip portion 183 and the brake lever 181 are arranged so as to face each other in the left-right direction (spaced so that they can be gripped with one hand), and an operator grips the grip portion 183 together with the brake lever 181 so that the brake lever 181 can be easily operated. The rocking operation (pushing operation to the left) can be performed. Further, the brake lever 181 is provided at a position deviated from the operation lever 203 of the hot stick 200 by 90 degrees in the circumferential direction (around the axis of the hot stick 200). That is, the brake lever 181 is arranged to the right of the insulating rod 201, and the operation lever 203 is arranged below the insulating rod 201. The operation direction of the brake lever 181 is set to be a direction orthogonal to the operation direction of the operation lever 203 of the hot stick 200. Therefore, the brake lever 181 and the operation lever 203 do not interfere with each other to hinder the operation of each lever.

The wire case 185 is formed in a hollow rectangular box shape, and a wire connecting mechanism (not shown) to which one ends of the three brake wires 188 are connected is provided inside the wire case 185. The wire connecting mechanism is connected to the brake lever 181 via a single operation wire 186 so as to be interlocked with the brake lever 181. This wire connecting mechanism operates in a direction of pulling each brake wire 188 (direction of releasing the brake) by swinging the brake lever 181 to the left, and releasing the operation of the brake lever 181 causes the wire A coil spring (not shown) provided in the case 185 operates in a direction in which each brake wire 188 is loosened (a direction in which a brake is applied). On the other hand, the other end of each brake wire 188 is connected to each upper brake device 190 of the first joint K1 to the third joint K3. That is, each brake wire 188 and each upper brake device 190 are connected in a one-to-one relationship. Each brake wire 188 is covered with a wire tube 189 made of synthetic resin except both ends in the axial direction, and is slidably inserted along the inner surface of the brake tube 189. One end of each wire tube 189 is connected to the side surface of the wire case 185 by a fixing fitting 185a, and the other end is connected to each upper brake device 190.

  Subsequently, the upper brake device 190 provided in each of the joints K1 to K3 will be described. Since each of the upper brake devices 190 has the same structure, the upper brake device 190 provided in the second joint K2 will be described below as an example. Here, FIG. 16 is a sectional view of the upper brake device 190 for the second indirect K2, FIG. 17 is a side view showing the internal structure of the upper brake device 190 for the second indirect K2, and FIG. 18 is a second indirect K2. FIG. 3 is a side view showing an external structure of an upper brake device 190 for a vehicle.

  As shown in FIGS. 16 to 18, the upper brake device 190 includes an outer ring 191 fixed to the first arm tip portion 161c and an inner ring fixed to the second rotating shaft 163 and accommodated in the outer ring 191. 192, a plurality of pairs of rollers 194 and 195 arranged between the outer ring 191 and the inner ring 192, a coil spring 196 supported between the pair of rollers 194 and 195, and a pair of rollers 194 and 195. And a drive mechanism 197 for relatively moving the two in a direction of approaching each other and a direction of separating them from each other.

  The outer ring 191 is formed in a hollow cylindrical shape having a substantially square internal space. The inner ring 192 is formed in a substantially cylindrical shape and is coaxially arranged in the inner space of the outer ring 191. A wedge-shaped space 193 that accommodates and holds the plurality of rollers 194 and 195 is formed between the inner peripheral surface of the outer ring 191 and the outer peripheral surface of the inner ring 192. In this wedge-shaped space 193, the inner peripheral surface of the outer ring 191 serves as a circumferential surface and is formed to have a wide width in the radial direction (a wider space than the diameter of the rollers 194 and 195) and the inner ring of the outer ring 191. A space portion (a space portion having a width narrower than the diameter of the rollers 194, 195) is formed in which the circumferential surface serves as a cam surface and becomes narrower in the radial direction toward one side in the circumferential direction.

  The pair of rollers 194, 195 includes a first roller 194 and a second roller 195, each of which is formed of a cylindrical body having the same shape. The coil spring 196 is disposed between the first roller 194 and the second roller 195, and always biases the rollers 194 and 195 in a direction in which they are separated from each other (a direction in which the wedge-shaped space 193 becomes narrower).

  The drive mechanism 197 is configured to have a first lever member 198 and a second lever member 199 formed in a substantially disc shape, and these are arranged in a state where they are laterally overlapped. A first pin 198a extending in the wedge-shaped space 193 and arranged near the first roller 194 is fixed to the left side surface of the first lever member 198. A second pin 199a, which extends into the wedge-shaped space 193 and is arranged near the second roller 195, is fixed to the left side surface of the second lever member 199. The ends of the second rotary shaft 163 are inserted in the left-right direction at the centers of the lever members 198 and 199, and the lever members 198 and 199 are prevented from coming off from the ends of the second rotary shaft 163. The end plate 163a is fastened and fixed by a bolt 163b. The first lever member 198 and the second lever member 199 are held so as to be relatively rotatable around the second rotation shaft 163. Since the second lever member 199 is disposed inside the first lever member 198, the second lever member 199 has an arc shape for inserting the first pin 198a extending from the first lever member 198. A long hole (not shown) is opened.

The lever members 198 and 199 are respectively formed with protruding wire holding protrusions 198b and 199b that protrude outward. The other end of the brake wire 188 is connected to the wire holding protrusion 198b of the first lever member 198. The other end of the wire tube 189 is connected to the wire holding protrusion 199b of the second lever member 199. A coil spring 197a is arranged between the wire holding protrusions 198b and 199b to bias the wire holding protrusions 198b and 199b in a direction in which they are separated from each other.

  In such an upper brake device 190, when the brake lever 181 is not operated, the pair of rollers 194 and 195 are separated from each other by the elastic force of the coil spring 196 in the wedge-shaped space 193 (the direction in which the wedge-shaped space 193 becomes narrower). ), each roller 194, 195 is in a state of being caught (sandwiched) between the inner peripheral surface of the outer ring 191 and the outer peripheral surface of the inner ring 192. As a result, the relative rotation between the outer ring 191 and the inner ring 192 is regulated (as a result, the swing of the second arm 162 with respect to the first arm 161 is brought into a locked state in which the swing is damped).

  On the other hand, when the brake lever 181 is operated, the brake wire 188 is pulled, and the wire holding protrusions 198b and 199b move toward each other against the elastic force of the coil spring 197a (the lever members 198). , 199 relatively rotate), the first roller 194 and the second roller 195 move in the wedge-shaped space 193 in a direction in which they approach each other by the pins 198a and 199a (a direction in which the wedge-shaped space 193 becomes wider), The rollers 194, 195 are released from the inner peripheral surface of the outer ring 191 and the outer peripheral surface of the inner ring 192, and are in a released state, so that the outer ring 191 and the inner ring 192 can rotate relative to each other (as a result, the first ring). (The lock release state in which the swing of the second arm 162 with respect to the arm 161 is allowed) is obtained.

  Next, as a characteristic operation of the hot stick support device 100 according to the present embodiment, a procedure for attaching the hot stick support device 100 to the workbench 40 will be described.

  First, in order to perform a predetermined indirect hot-line work, an operator who has boarded the workbench 40 moves the workbench 40 to a desired high position and then attaches the gantry unit 110 to the workbench 40. At this time, the operator selects the side wall portions 42a and 43a of the four side wall portions 42a and 43a provided on the workbench 40 at positions suitable for the indirect hot line work this time (however, the work operation device 45 is installed). The side wall portions 42a and 43a that have been formed can be selected) and the gantry unit 110 can be attached. Specifically, by inserting the U-shaped spaces of both main frames 112 through the side wall portions 42a and 43a and placing the intermediate frame portion 112c on the upper end of the liner protector 44, the outer frame portion 112a is placed on the workbench. 40, and the inner frame portion 112b is placed inside the workbench 40 in a temporary placement state. At this time, each main frame 112 is finely adjusted back and forth to bring the pressing pad 116 into contact with the outer surface of the side wall portion 42a of the workbench 40. Then, the four clamp levers 126 are pushed down to press each clamp pad 128 against the inner surface of the side wall portion 43a of the workbench 40, so that the collar portion 43b is formed between the outer arm portion 112a and the upper clamp pad 128. It is possible to fix the gantry unit 110 to the workbench 40 by sandwiching the side wall portions 42a and 43a between the pressing pad 116 and the lower clamp pad 128. Thereby, the gantry rail 130 is fixedly held at the upper end position of the work table 40 along the extending direction of the liner protector 44. Subsequently, the entire arm unit 140 is lifted, and the slider 141 of this arm unit 140 is inserted into the rail groove 134 of the gantry rail 130. Thereby, the arm unit 140 is attached to the gantry unit 110 (the gantry rail 130), and the hot stick support device 100 is assembled. By closing the left and right open ends 134b of the rail groove 134 with the cap 135, the slider 141 is in a state in which it does not come off from the rail groove 134.

  Next, a procedure for attaching the hot stick 200 to the hot stick supporting device 100 thus installed on the workbench 40 will be described.

First, the lock mechanism (turn catch clip) 173b of the holder 170 is released, and the movable support plate 176 is opened with respect to the fixed support plate 174. As a result, the fixed-side grasping tool 175 and the movable-side grasping tool 177 are separated from each other, and the handle portion 204 of the hot stick 200 can be attached between them. At this time, if the diameter of the handle portion 204 of the hot stick 200 is the relatively large first diameter (32 mm), the handle portion 204 of the hot stick 200 is held in the retracted posture and the handle portion 204 of the hot stick 200 is held on the fixed side gripping tool. The handle 204 of the hot stick 200 is gripped between the fixed-side gripping tool 175 and the movable-side gripping tool 177 by placing it on the 175 and closing the movable-side support plate 176. On the other hand, when the diameter of the handle portion 204 of the hot stick 200 is the second diameter (26 mm) which is relatively small, the spacer 178 is pulled out onto the fixed-side grasping tool 175 to be in the deployed posture, and By placing the handle 204 on the spacer 178 and then closing the movable support plate 176, the handle of the hot stick 200 with the spacer 178 interposed between the fixed-side gripping tool 175 and the movable-side gripping tool 177. Hold 204. Then, after the movable support plate 176 is closed with respect to the fixed support plate 174 as described above, the movable support plate 176 is locked and fixed to the fixed support plate 174 by using the lock mechanism 173b provided between the movable support plate 176 and the fixed support plate 174. As a result, the hot stick 200 is firmly held without falling off from the holder 170.

  Next, a procedure for using the hot stick support device 100 will be described. In this hot stick support device 100, the operator can manually slide, rotate and swing the movable arm 160.

  First, the clamp lever 154 is pushed down to retreat the pair of clamp pads 158 and 159 of the lower brake device 150 upward, thereby releasing the braking of the slider 141 and the swing plate 147 at the same time. Then, the slider 141 is slid leftward and rightward along the rail groove 134, and the swivel plate 147 is horizontally swung to displace the entire movable arm 160 to a desired slide position and swivel position. In addition, the brake lever 181 is operated to pull each brake wire 188 toward the brake lever 181 side, and the rollers 194 and 195 of each upper brake device 190 are released in the wedge-shaped space 193. , 162 and the holder 170 are released from braking. Next, the arms 161 and 162 and the holder 170 are swung around the indirect arms K1, K2, and K3 to change the position and direction of the hot stick 200, and the entire movable arm 160 is brought into a desired swing posture. As a result, the hot stick 200 gripped by the tip of the movable arm 160 can be positioned in the vertical, horizontal, and front-rear directions to have a posture suitable for work. Then, by pushing up the clamp lever 154 and moving the pair of clamp pads 158 and 159 downward, the slider 141 and the swivel plate 147 can be simultaneously braked, and the operation of the brake lever 181 is released. , The arms 161 and 162 and the holder 170 can be simultaneously braked, whereby the hot stick 200 can be fixed at a desired position or posture.

  As described above, the movable arm 160 as a whole is slid, swung, and swung to change or fix the position or posture of the hot stick 200, and the operation lever 203 of the hot stick 200 is operated to perform a required indirect live-line work. You can

  As described above, according to the hot stick support device 100 of the present embodiment, the first arm 161, the second arm 162, and the holder 170 are configured to be mutually positionable in parallel planes that are offset in the horizontal direction. The arms can cooperate with each other to perform a fine swinging operation over a wide range of work, and instead of limiting the degree of freedom of movement of the movable arm 160 to some extent as compared with the case where a ball joint is used for each joint. Since the movable arm 160 does not move in an unintended direction, the difficulty of the positioning operation can be reduced, and the movable arm 160 can be accurately and easily moved to a desired position. It is possible to improve the work efficiency of live work.

  Further, according to the hot stick support device 100 of the present embodiment, the first arm 161, the second arm 162, and the holder 170 are integrally swingable, slidable, and horizontally rotatable, so that the work site Since the position and the posture of the hot stick 200 can be freely adjusted without being restricted by the work range and the like in FIG. 3, it is possible to improve the workability of the indirect live work.

  Further, according to the hot stick support device 100 of the present embodiment, since the lower braking device 150 and the upper braking device 190 are configured to be independently operable, the orientation with respect to the object (electric wire) of the indirect hot-wiring work. According to the distance, the working method, or the like, one of the swing mechanism and the slide swing mechanism of the movable arm 160 is freely moved while the other is being braked, and the swing posture and the slide swing position of the movable arm 160 are set. Since the hot sticks 200 can be individually and independently adjusted, the position and the posture of the hot stick 200 can be easily adjusted, and the work efficiency of the indirect hot-line work can be improved with a simple configuration.

  Further, according to the hot stick support device 100 of the present embodiment, the clamp lever 126 of the attachment/detachment device 120 of the gantry unit 110 is arranged inside the work table 40, so that the worker who has boarded the work table 40 can mount the gantry unit 110. Since the work stick 40 can be attached and detached from the inside of the workbench 40, it becomes possible to easily and safely change the mounting position of the hot stick support device 100 at the high position without once returning to the ground. It is possible to further improve the work efficiency of the work.

  Further, according to the hot stick support device 100 of the present embodiment, the slider 141 and the swivel plate 147 can be simultaneously braked by one operation by one clamp lever 154, and one hand shakes the movable arm 160. Even if it is blocked by the dynamic operation, the braking operation of the slider 141 and the swivel plate 147 can be performed simultaneously with only the other hand (one hand), so that the operability in such a composite operation is improved. It becomes possible.

  Further, according to the hot stick support device 100 of the present embodiment, the brake lever 181 is arranged at a position shifted by approximately 90 degrees with respect to the operation lever 203 of the hot stick 200, and the operation direction of the brake lever 181 and the operation lever 203 are changed. Since the operation direction is set to be orthogonal to each other, the brake lever 181 and the operation lever 203 do not interfere with each other to hinder the operation of each of them, regardless of the swinging posture of the movable arm 160 or the hot stick 200. Instead, each lever can be operated reliably.

  Further, according to the hot stick support device 100 of the present embodiment, the hot stick 200 is selectively used in accordance with the diameter of the handle portion 204 of the hot stick 200, so that the hot stick can be used. Since the gap (grip interval) between the fixed-side grip 175 and the movable-side grip 177 is always substantially constant irrespective of the diameter of the handle 204 of the 200, for example, a tool-free lock such as a patch lock or a snap lock. The handle 204 of the hot stick 200 can be easily and firmly fixed using the mechanism, and the operability of attaching and detaching the hot stick 200 can be improved.

  The present invention is not limited to the above-described embodiment, and can be appropriately improved within the scope of the present invention.

For example, in the above-described embodiment, as an aerial work vehicle according to the present invention, a telescopic boom-type aerial work vehicle has been described as an example, but the invention is not limited to this, and for example, a bending/bending boom-type work vehicle The present invention can be applied to any aerial work vehicle, which may be a work vehicle or the like, and has a configuration in which a work platform for the operator to board is provided at the tip of the boom. Further, in the above-described embodiment, the electric drive type (battery drive type) aerial work vehicle is described as an example, but the present invention is not limited to this, and the power of the engine is controlled by the PTO mechanism (power take-off mechanism). It may be a PTO-driven aerial work vehicle that takes out and drives the hydraulic pump, or a hybrid-type aerial work vehicle that includes both of them and that selectively switches the power source.

1 aerial work vehicle 2 vehicle body 7 driving cab 20 swivel base 30 boom 40 work platform 45 work control device 100 hot stick support device (indirect live wire tool support device)
110 Stand unit (base member)
111 Support frame 112 Main frame 112a Outer frame part 112b Inner frame part 112c Intermediate frame part 113 Sub frame 116 Holding pad 120 Attachment/detachment device 126 Clamp lever 128 Clamp pad 130 Frame rail 140 Arm unit 141 Slider 142 Slide roller 143 Swivel support member 147 Swivel Plate 148 Support 149 First swing shaft 150 Lower brake device 154 Clamp lever 156 Connection plate 158 First clamp pad 159 Second clamp pad 160 Movable arm 161 First arm (arm member)
162 second arm (arm member)
163 Second swing shaft 170 Holder (grasping device)
171 Holder base 172 Third swing shaft 174 Fixed support plate (first support member)
175 Fixed side grip (first grip)
176 Movable support plate (second support member)
177 Movable grip (second grip)
178 Spacer (spacer member)
178a Spacer body 178b Connection arm part (connection part)
181 Brake lever 190 Upper brake device 200 Hot stick (indirect live wire tool)
201 Insulating Rod 202 Gripping Claw 203 Operation Lever 204 Handle (Grip Target)
K1 1st joint K2 2nd joint K3 3rd joint

Claims (2)

In an aerial work vehicle including a boom provided at least on the vehicle body so as to be able to move up and down, and a work platform provided at the tip of the boom,
A base member provided on the upper edge of the workbench,
An arm member swingably provided on the base member,
A gripping device that is provided at the tip of the arm member and grips an indirect hot-line tool,
The gripping device includes an indirect live line between a holder base fixed to a tip portion of the arm member, a first support member provided on the holder base and having a first gripping portion, and the first gripping portion. A second support member having a second grip portion for gripping a tool, a deployment posture provided on the first support member and entering between the first grip portion and the second grip portion, and the first grip portion And a spacer member that retreats from the second grip portion and changes its posture between the retracted posture stored in the first support member and the storage posture.
When the diameter of the grasped portion of the indirect hot-line tool is the first diameter, the held portion of the indirect live-action tool is placed between the first grasping portion and the second grasping portion with the spacer member in the retracted posture. Hold the
When the diameter of the gripped portion of the indirect hot-line tool is the second diameter smaller than the first diameter, the spacer member is placed in the unfolded posture, and the space between the first grip portion and the second grip portion An indirect live-wire tool support device for an aerial work vehicle, characterized in that it grips a gripped portion of the indirect live-wire tool with a spacer member interposed. The spacer member includes a spacer body inserted between the first grip portion and the second grip portion, and a connecting portion integrally formed with the spacer body and connected to the first support member. The indirect live wire tool supporting device for an aerial work vehicle according to claim 1, wherein the device is configured.

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