JP2014111882A - Electric pole support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric pole support device capable of lifting an electric pole upright while keeping the position of a boom head at a low position when lifting the electric pole.SOLUTION: An electric pole support device 40 is provided on a boom head 20, and supports an upper part of an electric pole lifted using a wire 17 drooping through a sheave provided rotatably on the boom head 20. The electric pole support device 40 has a main body frame 41 which is fitted to the boom head 20 swingably substantially coaxially with the sheave pin, and has a housing space 47 capable of housing an upper part of an electric pole, and the main body frame 41 has its gravity center position set so as to swing as a boom rises and falls and to be substantially horizontal.

Description

  The present invention relates to a utility pole support device that is provided at the tip of a boom and supports an upper portion of a utility pole suspended from the tip of the boom.

  As a work vehicle on which such a power pole support device is mounted, for example, a digging construction column car disclosed in Patent Document 1 is known. FIG. 16 shows a state in which a conventional digging column car 100 is viewed from the rear, and the digging column car 100 includes a boom 110 that can freely turn, undulate, and expand and contract on the vehicle body. An earth auger 120 is attached to the boom 110, so that a pillar hole for installing a utility pole can be excavated. A boom head 130 is provided at the tip of the boom 110, and a wire (not shown) fed out from the winch 140 hangs downward via a sheave (not shown) attached to the boom head 130. It has become. The boom head 130 is provided with a contact support plate 150 for pressing and supporting the upper portion of the utility pole for stable support during the lifting work of the utility pole.

  In general building column work performed by the digging column car 100, first, a building column hole is excavated using the earth auger 120. Subsequently, the hook 160 at the lower end of the wire is hooked on the rope attached to the electric pole, and the wire is wound up by the winch 140. By doing so, the utility pole is lifted with its lower end grounded, and an operator on the ground operates the lower end of the utility pole, thereby bringing the upper portion of the utility pole into contact with the contact support plate 150 and supporting it. In this state, the boom 110 is appropriately operated so that the lower end portion of the utility pole is positioned on the building pole hole, and the boom 110 is collapsed and contracted to build the utility pole in the building pole hole.

  Conventionally, the utility pole is long in the axial direction and heavy in accordance with it, so that it is difficult to handle the utility pole, and in particular, the work load at the time of carrying work is large. Therefore, in recent years, in order to facilitate the handling of the utility pole, the utility pole is divided into two in the axial direction, and connected to the lower pillar LD built in the construction pole hole H and the upper end portion LF of this lower pillar LD as shown in FIG. A divided column D composed of an upper column UD has been developed, and the use of the divided column D is progressing. In the construction work of the divided pillar D, first, after installing the lower pillar LD in the construction pillar hole H, the upper pillar UD is lifted above the lower pillar LD and boarded on the work platform of the aerial work vehicle. The operator who has done this aligns the upper end portion LF of the lower pillar LD and the lower end portion UF of the upper pillar UD and connects them.

JP-A-10-331488

  For this reason, in order to easily align the upper end portion LF of the lower column LD and the lower end portion UF of the upper column UD in the construction work of the divided column D, the upper column UD is lifted as upright as possible. desired. Therefore, when a lifting rope is attached to the upper column UD, for example, a method of attaching the rope to the center of gravity UG as far as possible is conceivable. However, when this method is adopted, there is a problem that the position of the boom head 130 becomes high when the upper column UD is lifted according to the position where the rope is fastened, and the boom head 130 contacts the electric wire L. . Note that if the lifting rope is lifted by being attached to the lower side of the upper column UD, the boom head 130 can be held at a low position, but there is a problem that the upper column UD is easily lifted.

  This invention is made in view of such a subject, and it aims at providing the utility pole support apparatus which can lift a utility pole in an upright state, restraining the position of the boom head when raising a utility pole low. To do.

  In order to achieve such an object, the utility pole support device according to the present invention is provided at least at the tip of the boom that can freely move up and down (for example, the boom head 20 in the embodiment), and is freely rotatable at the tip of the boom. A power pole support device for supporting an upper portion of a power pole that is suspended by using a wire or the like suspended through a provided sheave, the rotation axis of the sheave (for example, the sheave pin 24 in the embodiment) being substantially the same axis The main body member (for example, the main body frame 41 in the embodiment) having a housing space that can be swung freely attached to the tip of the boom and can accommodate the upper part of the utility pole. The center of gravity position is set so that the main body member is substantially horizontal.

  In the above-described utility pole support device, it is preferable that the main body member has an opening in one of the side, the front, and the rear of the tip of the boom.

  The main body member preferably includes an opening / closing member (for example, the opening / closing arm 50 in the embodiment) that is movable between an open position that opens the opening and a closed position that closes the opening. .

  Further, at least one of the main body member and the opening / closing member is provided so as to face the housing space, and is rotatable about a rotating shaft that is substantially orthogonal to the axial direction of the power pole that is housed and supported in the housing space. A configuration provided with various roller members (for example, the frame side roller 46 and the arm side roller 54 in the embodiment) is preferable.

  The main body member is positioned on one side of the tip of the boom and attached to the tip, and on the other side of the boom tip and on the tip. A configuration in which it is selectively and detachably attached to the attachment side on the other side is preferable.

  The utility pole support device according to the present invention is configured such that the position of the center of gravity is set so that the main body member swingably attached to the tip of the boom is substantially horizontal. For this reason, the hoisting rope is attached to the lower side of the utility pole, and the height of the boom tip when the utility pole is lifted is kept low, while the upper part of the raised utility pole is accommodated in the accommodation space. Regardless of the undulation movement, the pole can be held in an upright state to suppress the inclination.

  In the above-described utility pole support device, it is preferable that the main body member has an opening in one of the side, the front, and the rear of the tip of the boom. In the case of this configuration, for example, if the operator operates the lower part of the suspended utility pole, the upper part of the utility pole can be accommodated in the accommodation space and supported by the utility pole support device.

  The main body member preferably includes an opening / closing member that is movable between an open position for opening the opening and a closed position for closing the opening. By providing the opening / closing member in this manner, it is possible to achieve both a configuration that can easily accommodate the utility pole in the accommodation space and a configuration that can reliably support the utility pole accommodated in the accommodation space.

  In the above-described power pole support device, it is preferable that at least one of the main body member and the opening / closing member includes a roller member that is rotatably provided facing the accommodation space. With this configuration, when the wire is fed and wound while the utility pole is supported in the accommodation space, the utility pole that moves up and down with respect to the tip of the boom comes into contact with the rotatable roller member. The electric pole can be smoothly moved up and down.

  The main body member is configured to be selectively and detachably attached to one side mounting position located on one side of the tip of the boom and the other side mounting position located on the other side of the tip of the boom. Is preferred. If comprised in this way, since the attachment position of a main body member (electric pole support apparatus) can be selected from one side attachment position and the other side attachment position, for example according to the overhead state of an electric wire, etc., a utility pole support apparatus This makes it easier to lift the utility pole by avoiding contact with the electric wire.

It is a side view (state which excavates a building pillar hole) of a digging construction column car to which the present invention is applied. It is a side view (state which puts a lower pillar in a construction pillar hole) of the above-mentioned digging construction pillar car. It is a perspective view which shows the boom head vicinity. It is a side view which shows the boom head vicinity. It is a top view which shows a boom head vicinity, Comprising: (a) shows the state by which the open / close arm was rock | fluctuated to the closed position, (b) shows the state by which the open / close arm was rock | fluctuated to the open position, respectively. It is a figure which shows the state which lifts an upper pillar and connects with a lower pillar. (A) is a top view which shows the modification of a utility pole support apparatus, (b) is a perspective view which shows the ball caster used for the modification. It is a perspective view which shows the main body frame which concerns on another modification. It is a perspective view which shows the holding | grip arm attached to the main body frame of FIG. It is a perspective view which shows a utility pole support apparatus (state in which the holding arm is located in the open position). It is a top view which shows a utility pole support apparatus (state in which the holding arm was located in the open position). It is a perspective view which shows a utility pole support apparatus (state in which the holding arm is located at the closed position). It is an enlarged view of the arm locking device vicinity in FIG. It is a top view which shows a utility pole support apparatus (state in which the holding arm was located in the closed position). It is a front view of the utility pole support apparatus which concerns on another modification. It is a figure which shows the state which lifts an upper pillar and connects with a lower pillar with the conventional digging pillar car.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a digging column car 1 equipped with a utility pole support device 40 according to the present invention will be described. First, the structure of this digging pillar car 1 is demonstrated, referring FIGS.

  1 and 2 show a state in which the digging column 1 is viewed from the left side. As can be seen from these drawings, the digging column 1 has tire wheels 2 on the front, rear, left and right. The vehicle is configured based on a truck vehicle that can run and has a driving cab 3 at the front. On the vehicle body 4 of the truck vehicle, there is disposed a turntable 12 that is driven by a turn motor (hydraulic motor) (not shown) so as to be able to turn horizontally around the vertical axis. A base 13 is pivotally connected to the swivel base 12 and a boom 13 is attached. The boom 13 is moved up and down by a hoisting cylinder (not shown). The boom 13 is configured such that a proximal boom 13a, an intermediate boom 13b, and a distal boom 13c are combined in a telescopic manner, and can be expanded and contracted by a built-in telescopic cylinder (not shown).

  An auger support 14 is attached to the boom 13 so as to be slidable in the longitudinal direction. An earth auger 15 that is rotationally driven by an auger motor (hydraulic motor) (not shown) is swingable below the auger support 14. Is attached. The auger support 14 is configured to be selectively connectable to the boom head 20 and the distal end portion of the proximal boom 13a. As shown in FIG. 1, the auger support 14 is connected to the boom head 20 to perform excavation work by the earth auger 15, while the auger support 14 is connected to the distal end of the proximal boom 13a as shown in FIG. The earth auger 15 is stored. A winch 16 that feeds and winds the wire 17 disposed along the axial direction of the boom 13 is provided at the upper portion on the proximal end side of the proximal boom 13a.

  3 and 4 show the tip of the tip boom 13c. As can be seen from these drawings, a boom head 20 is attached to the tip of the tip boom 13c. The boom head 20 has a pair of left and right side plates 21 and is formed in a box shape. As shown in FIG. 4, sheaves 22 and 23 are rotatably mounted inside the boom head 20. The wire 17 drawn out from the winch 16 hangs downward through the sheaves 22 and 23. The wire 17 that hangs downward through the sheave 23 is wound around a movable pulley of the hook 18, and the tip thereof is fixed in the boom head 20. Therefore, the hook 17 can be pulled up and down by feeding and winding the wire 17 by the winch 16.

  As shown in FIG. 3, a flat contact support plate 30 is attached to the tip of the boom head 20. An abutting tip contact portion 31 that is recessed in an R shape is formed on the distal side surface of the contact support plate 30, while a lateral contact portion 32 that is recessed in an R shape is formed on the left and right side surfaces of the contact support plate 30. Has been. For this reason, when the utility pole is lifted using the wire 17, the utility pole can be stably supported by bringing the upper portion of the utility pole into contact with the tip contact portion 31 or the side contact portion 32. . In addition, the curvature of the front-end | tip contact part 31 and the side contact part 32 is comparable as or more than the curvature of the outer periphery of a utility pole.

  As shown in FIG. 3, a utility pole support device 40 is attached to the side of the boom head 20 to support the upper part of the utility pole when the utility pole is lifted. The utility pole support device 40 includes a main body frame 41 attached to the boom head 20 having an accommodation space 47 capable of accommodating an upper portion of the utility pole on the inside, and a pair of opening / closing arms swingably provided on the main body frame 41. 50 and a swing cylinder 60 that is pivoted across a pair of opening / closing arms 50.

  The main body frame 41 includes a base portion 42 formed by bending a plate-like member at two locations, a cylindrical connecting portion 43 formed to project from the central portion of the base portion 42 toward the boom head 20, and a base portion 42. Between the pair of pivot portions 44 formed at both ends of the pair, the pair of roller support portions 45 erected from the central portion of the base portion 42 toward the accommodating space 47, and the pair of roller support portions 45. And a frame-side roller 46 that is provided so as to be rotatable about a rotation axis formed by connecting the two.

  The open / close arm 50 has a base portion 51 formed in a flat plate shape, a swinging shaft portion 52 erected on an end portion of the base portion 51, and a cross-section substantially formed by bending from the swinging shaft portion 52. A circular arm-shaped support portion 53 and an arm-side roller 54 provided at the tip of the arm-shaped support portion 53 so as to be rotatable around the arm-shaped support portion 53 are configured. The open / close arm 50 is swingable about the swing shaft portion 52 with the swing shaft portion 52 being pivotally connected to the pivot portion 44 of the main body frame 41 (in the direction of arrow A shown in FIG. 3). ).

  The swing cylinder 60 is configured to be extendable and contractable using, for example, a hydraulic cylinder. FIG. 5 shows a plan view of the boom head 20 and the utility pole support device 40. As can be seen from FIG. 5, the swing cylinder 60 has a bottom end and a rod end at the base of the open / close arm 50, respectively. It is pivoted to part 51. For this reason, when the swing cylinder 60 is extended, as shown in FIG. 5A, the arm-shaped support portion 53 swings so that the tips of the support portions 53 approach each other, thereby supporting the utility pole stored in the storage space 47. It can be located in a possible closed position. On the other hand, when the oscillating cylinder 60 is moved in a contracted manner, as shown in FIG. The electric pole can be positioned in an open position where it can be inserted.

  As shown in FIG. 5, the sheave 23 is rotatable around a sheave pin 24 that protrudes toward the utility pole support device 40. The connecting portion 43 of the main body frame 41 is inserted into the protruding portion of the sheave pin 24 so that the main body frame 41 (electric pole support device 40) can swing around the sheave pin 24 (in the direction of arrow B shown in FIG. 3). ). Further, the center of gravity position of the utility pole support device 40 (main body frame 41) is set so that the accommodation space 47 is located at the swinging position extending in the vertical direction regardless of the up-and-down movement of the boom 13. The connecting portion 43 (electric pole support device 40) is detachably attached to the sheave pin 24 using bolts, pins, or the like.

  As shown in FIG. 1 and FIG. 2, outriggers 5 that are extendable downward are provided at four front, rear, left, and right positions of the vehicle body 4, and when performing excavation work for pole posts or pole works for utility poles, The vehicle body 4 can be lifted and supported by projecting downward. Further, an operating device 6 is provided on the vehicle body 4, and by operating this operating device 6, the turning motion of the swivel base 12, the raising and lowering motion of the boom 13, the rotational motion of the earth auger 15, and the winch. 16 can be rotated and the open / close arm 50 can be swung.

  Heretofore, the configuration of the digging column car 1 has been described. In the following, the operation of the digging column car 1 will be described by exemplifying the work of excavating the building column hole H and building the divided columns D (the lower column LD and the upper column UD) in the building column hole H. . Here, a case will be described in which, when the lower pillar LD and the upper pillar UD are lifted, the upper portions of the lower pillar LD and the upper pillar UD are supported using the utility pole support device 40.

  First, as shown in FIG. 1, a building column hole H is excavated using an earth auger 15 at a place where a divided column D (lower column LD) is to be built. At this time, the auger support 14 is connected to the boom head 20, and the earth auger 15 is swung so as to be in an upright state. In this state, the boom 13 is fallen down and contracted while the earth auger 15 is rotated, and the building column hole H for installing the divided column D is excavated. In FIG. 1, the boom 13 in a state of excavating the building pillar hole H and the boom 13 in a state of being stored on the vehicle body 4 are shown.

  Next, the work of building the lower pillar LD in the pillar hole H is performed. In this operation, first, as shown in FIG. 2, a hook 18 is hung on the rope 7 fastened to the lower pillar LD, the wire 17 is wound up by the winch 16, the boom 13 is raised and lowered, and the lower end is separated from the ground. Lift up the lower pillar LD. Here, the rope 7 is attached to a position shifted from the center of gravity to the tip side so that the lower column LD is slightly inclined from the upright position in the suspended state. Subsequently, the operating device 6 is operated to reduce the swing cylinder 60, and the open / close arm 50 is swinged to the open position (see FIG. 5B). The lower column LD is swung with the portion where the rope 7 is attached as a fulcrum, and the upper portion of the lower column LD is accommodated in the accommodating space 47 of the utility pole support device 40. When the upper part of the lower pillar LD is accommodated in the accommodation space 47 of the utility pole support device 40, the lower pillar LD may be placed in a state where the lower end is in contact with the ground.

  When the upper portion of the lower pole LD is accommodated in the accommodation space 47, the operating device 6 is operated to swing the open / close arm 50 to the closed position (see FIG. 5A). Support the top of the LD. In this state, the boom 13 is raised and lowered so that the lower end of the lower pillar LD is positioned on the building pillar hole H, and then the boom 13 is lowered and contracted to install the lower pillar LD in the building pillar hole H. Thereafter, the operating device 6 is operated to swing the open / close arm 50 to the open position, and in this state, the boom 13 is operated to separate the boom 13 and the lower pillar LD. In FIG. 2, the boom 13 in a state in which the lower pillar LD is installed in the building pillar hole H and the boom 13 in a state of being stored on the vehicle body 4 are shown.

  Here, as described above, the utility pole support device 40 is swingable around the sheave pin 24. Therefore, even if the boom 13 is raised and lowered while the upper portion of the lower pole LD is supported by the utility pole support device 40, the utility pole support device 40 holds the sheave pin 24 so that the lower pole LD maintains an upright state in a side view. Swings to the center. Therefore, the upright state in the side view of the lower pillar LD can be maintained regardless of the up-and-down movement of the boom 13, and the work of positioning the lower end of the lower pillar LD on the building pillar hole H is facilitated. Also, as shown in FIG. 4, since the hook 18 includes a moving pulley, the center of the hook 18 (rotating shaft of the moving pulley) and the sheave pin 24 (the swinging shaft of the utility pole support device 40) are substantially vertical. Match. For this reason, by accommodating the upper part of the lower pillar LD in the accommodation space 47 of the utility pole support device 40, the lower pillar LD can be supported in an upright state in a side view. After the lower pillar LD is installed in the building pillar hole H, the inclination is adjusted so that the lower pillar LD is in an upright state. It is done in contact.

  After the work of building the lower pillar LD in the building pillar hole H is completed in this way, the work of connecting the upper pillar UD to the upper part of the lower pillar LD is performed next. As shown in FIG. 6, the hook 8 is hung on the rope 8 that is fastened to the upper column UD, the wire 17 is wound up by the winch 16, the boom 13 is raised and lowered, and the lower end is separated from the ground. It is performed by lifting the upper column UD. Here, as shown in FIG. 6, in order to avoid the boom head 20 from coming into contact with the electric wire L when the upper column UD is lifted above the lower column LD, the rope 8 is positioned at the center of gravity UG of the upper column UD. It is difficult to get close to the vicinity (a position slightly shifted to the tip side from the center of gravity position UG). After the upper column UD is lifted away from the ground, the rope 8 is pulled by pushing or pulling the lower part of the upper column UD by an operator on the ground while the open / close arm 50 is swung to the open position. The upper column UD is swung with the attached portion as a fulcrum, and the upper portion of the upper column UD is accommodated in the accommodation space 47 of the utility pole support device 40. In addition, when the upper part of the upper column UD is accommodated in the accommodation space 47 of the utility pole support device 40, the upper column UD may be performed in a state where the lower end of the upper column UD is in contact with the ground.

  When the upper part of the upper pole UD is accommodated in the accommodation space 47, the operating device 6 is operated to extend the swing cylinder 60 and swing the open / close arm 50 to the closed position. Support the upper part of the UD. In this state, the boom 13 is swung, raised and lowered so that the upper column flange portion UF provided at the lower end of the upper column UD is positioned opposite to the lower column flange portion provided at the upper end of the lower column LD. The telescopic movement and the rotational movement of the winch 16 are performed. Further, along with these operations, a worker who has boarded a work platform of an aerial work vehicle (not shown) operates the lower end of the upper column UD to perform fine adjustment for alignment.

  At this time, since the utility pole support device 40 is swingable about the sheave pin 24, the upright state in the side view of the upper pole UD can be maintained regardless of the up and down movement of the boom 13, and the above-described alignment can be performed. Work becomes easier. Moreover, when the rope 8 is lifted by being attached to the vicinity of the center of gravity UG of the upper column UD, the upper column UD that can keep the position of the boom head 20 low is easily inclined. Since the upper part of the upper pole UD is supported by the utility pole support device 40, the upright state in the side view is maintained. Further, when the above alignment is performed, the winch 16 may be rotated and the wire 17 may be fed and wound. However, the utility pole support device 40 is provided with a frame side roller 46 and an arm side roller 54. Therefore, the upper column UD can be smoothly moved up and down while supporting the upper portion of the upper column UD. In order to smoothly perform the tilt adjustment operation of the upper column UD by an operator who has boarded the work table, a gap is provided between the upper column UD and the arm side roller 54 as shown in FIG. It is preferable to swing the open / close arm 50 as described above.

  After the upper column flange portion UF and the lower column flange portion LF are aligned as described above, the upper column flange portion UF and the lower column flange portion using bolts or the like by an operator on the work table. Are connected, and the work of building the divided pillar D in the building pillar hole H is completed.

  In the above-described embodiment, the operation of supporting the upper part of the lower pillar LD using the utility pole support device 40 when lifting the lower pillar LD is described as an example, but instead, the upper part of the lower pillar LD is applied. The lower pillar LD may be lifted while being in contact with the contact support plate 30.

  In the above-described embodiment, the configuration example in which the pair (two) of the opening / closing arms 50 is swung to open and close the accommodation space 47 has been described, but the present invention is not limited to this configuration. For example, the utility pole support device may be configured using one open / close arm, and the single open / close arm may be swung to open and close the accommodation space 47.

  In the above-described embodiment, the configuration in which the rollers (the frame-side roller 46 and the arm-side roller 54) are provided in each of the main body frame 41 and the opening / closing arm 50 has been described as an example. A configuration in which a roller is provided on either side is also possible.

  In the above-described embodiment, the configuration example in which the utility pole support device 40 is attached to the right side of the boom head 20 in FIG. 3 has been described, but the utility pole support device 40 is also attached to the left side of the boom head 20 using the sheave pin 24. A configuration that can be used is preferable. If comprised in this way, for example, according to the overhead state of an electric wire, etc., the electric pole support apparatus 40 can be selectively attached and positioned on the right side and the left side of the boom head 20, so the electric pole support apparatus 40 and the electric wire This makes it easier to carry out the work of lifting the utility poles.

  In the above-described embodiment, the utility pole support device 40 configured using the hydraulic swing cylinder 60 has been described. However, for example, the utility pole support device may be configured using an electrical swing cylinder. .

  In the above-described embodiment, the example in which the utility pole support device 40 according to the present invention is applied to a digging column car equipped with the earth auger 15 has been described. It is possible to apply the utility pole support device 40 according to the above.

  In the above-described embodiment, the utility pole support device 40 (main body frame 41) including the accommodation space 47 opened toward the side of the boom head 20 has been described as an example. A configuration in which the accommodation space 47 is opened toward the front or rear of the head 20 (upward or downward in the drawing in FIG. 3) may be employed.

  In the above-described embodiment, as illustrated in FIG. 2, the example in which the operator M operates the lower part of the utility pole when lifting the utility pole (upper pole UD or lower pole LD) has been described. It is not always necessary, and the utility pole can be lifted by the operator M without operating the lower part of the utility pole.

  The utility pole support device 40 described in the above embodiment may be configured as a utility pole support device 70 shown in FIG. The utility pole support device 70 is configured by replacing the frame side roller 46 and the arm side roller 54 of the utility pole support device 40 with a ball caster 80 shown in FIG. 7B. In the ball caster 80, a ball 82 is rotatably supported at the tip of the base portion 81 and exposed. Therefore, according to the utility pole support device 70, the utility pole can be supported so as to be movable in the vertical direction and rotatable.

  Instead of the utility pole support devices 40 and 70 described so far, a utility pole support device 240 (see FIG. 10) including the main body frame 241 shown in FIG. 8 and the grip arm 270 shown in FIG. 9 can be used. It is. Hereinafter, the utility pole support device 240 will be described. First, the configuration of the utility pole support device 240 will be described. In addition, below, the same number is attached | subjected to the component same as the utility pole support apparatus 40, and description here is abbreviate | omitted.

  The utility pole support device 240 is formed by bending a plate material into a substantially U shape in a plan view, and has a main body frame 241 having an accommodation space 247 capable of accommodating a utility pole inside, and a gripping swingably attached to the main body frame 241. And an arm 270. As shown in FIG. 8, the main body frame 241 is formed in a flat plate shape and is opposed to the guide side frame portion 242 that extends in the axial direction of the sheave pin 24, and is opposed to the guide side frame portion 242 with a space that can accommodate the power pole. The arm side frame portion 244 is connected to the guide side frame portion 242 and the base end portion of the arm side frame portion 244, and the base frame portion 243 is attached to the connecting portion 43. A guide end 242a that is bent obliquely in the opposite direction to the arm side frame 244 is formed at the tip of the guide side frame 242. The guide end 242a smoothly accommodates the utility pole. It can be accommodated in the space 247. The guide side frame portion 242 is attached to the inner surface (the surface facing the arm side frame portion 244) with support plates 252 and 252 formed in a plate shape from a resin material side by side.

  The arm side frame portion 244 is mounted on the inner surface (the surface facing the guide side frame portion 242) with support plates 254 and 254 formed in a plate shape from a resin material side by side (see also FIG. 11). . The arm side frame portion 244 includes a pair of upper and lower shaft support portions 244a protruding outward on the outer surface thereof, and an arm shaft member 255 is rotatably attached to the shaft support portions 244a and 244a. An arm locking portion 244b bent outward is formed at the distal end of the arm side frame portion 244, and a locking groove 244c is formed above the arm locking portion 244b.

  An arm lock device 260 is attached between the shaft support portion 244a and the arm locking portion 244b on the outer surface of the arm side frame portion 244. The arm lock device 260 is moved upward from the device main body 261 by the elastic force of the device main body 261 attached to the outer surface of the arm side frame 244 and a compression spring (not shown) provided in the device main body 261. The lock piece 262 protrudes and the lock release piece 263 is provided to extend downward from the apparatus main body 261. The arm lock device 260 is attached to the arm side frame portion 244 so that the tip position of the lock piece 262 is aligned with the position where the locking groove 244c is formed in the vertical direction.

  The base frame portion 243 has a support plate 253 formed in a plate shape made of a resin material on the inner surface (the surface forming the accommodation space 247) (see FIG. 10). A connecting portion 43 inserted through the sheave pin 24 is attached to the outer surface of the base frame portion 243.

  As shown in FIG. 9, the gripping arm 270 includes a distal end side arm portion 271 formed in a substantially L shape in plan view, and a proximal end side arm portion extending from the proximal end portion of the distal end side arm portion 271 to the proximal end side. 280.

  The distal arm portion 271 includes upper and lower arms 272 and 272 that are vertically opposed to each other with a predetermined interval, and an intermediate arm 273 that is disposed between and connects the upper and lower arms 272 and 272. The intermediate arm 273 includes a first intermediate arm 273a that connects the distal ends of the upper and lower arms 272, 272, a second intermediate arm 273b that is located on the proximal side of the first intermediate arm 273a, and a second intermediate arm 273b. And the third intermediate arm 273c located on the base end side. A roller shaft member 275 is attached to the upper portion of the first intermediate arm 273a so as to extend in a substantially horizontal direction, and a support roller 276 is rotatably attached to the roller shaft member 275. An arm lock portion 274 is attached between the second intermediate arm 273b and the third intermediate arm 273c so as to extend in a substantially horizontal direction. Shaft insertion holes 277 and 277 penetrating vertically are formed at the base ends of the upper and lower arms 272 and 272, respectively. Note that it is preferable that the support roller 276 be formed of a material softer than the utility pole, for example, a resin material.

  Of the pair of upper and lower upper and lower arms 271 and 271, the base end side arm portion 280 includes a first pressing arm 282 extending from the base end portion of the upper and lower upper arm 271 to the base end side, and the first pressing arm 282. It is comprised from the 2nd press arm 283 extended in the axial direction of the roller shaft member 275 in planar view from a base end part (refer also FIG. 11). A shaft insertion hole 281 penetrating in the vertical direction and communicating with the shaft insertion hole 277 is formed at the distal end portion of the first pressing arm 282 (the portion overlapping the base end portion of the upper and lower arms 271 vertically).

  Next, an assembly configuration of the utility pole support device 240 will be described.

  First, the grip arm 270 shown in FIG. 9 is attached to the main body frame 241 shown in FIG. Specifically, the base end portions of the upper and lower arms 271 and 271 are vertically stacked on the shaft support portion 244a of the arm side frame portion 244, and a hole portion (not shown) formed in the shaft support portion 244a and a shaft insertion hole. 277 (shaft insertion hole 281) is aligned. In this state of alignment, the arm shaft member 255 is inserted vertically into the shaft insertion hole 277 (shaft insertion hole 281), and the gripping arm 270 is swingable about the arm shaft member 255 to the main body frame 241. Install. At this time, by attaching the torsion spring 256 to the arm shaft member 255, the torsion spring 256 allows the grip arm 270 to move the distal end side arm portion 271 out of the accommodating space 247 as shown in FIGS. And the base end side arm portion 280 is elastically held at the open position located in the accommodation space 247. In this open position, when a clockwise force is applied to the gripping arm 270, the gripping arm 270 can be swung clockwise against the elastic force of the torsion spring 256. The utility pole support device 240 assembled in this way is attached to the boom head 20 so that the connecting portion 43 of the main body frame 241 is inserted into the sheave pin 24 and swings around the sheave pin 24.

  Next, the operation | movement of the utility pole support apparatus 240 is demonstrated with reference to FIGS.

  In a state where the utility pole (lower pole LD or upper pole UD) is not accommodated in the accommodation space 247, the grip arm 270 is held in the open position by the torsion spring 256 as shown in FIGS. 10 and 11. In this open state, as shown in FIG. 11, when the utility pole is inserted in the direction of arrow E toward the accommodation space 247, the utility pole twists the proximal-side arm portion 280 located in the accommodation space 247 of the torsion spring 256. The gripping arm 270 is pressed in the direction of arrow E against the elastic force, and is held in the receiving space 247 while swinging the gripping arm 270 in the direction of arrow F (clockwise). When the gripping arm 270 is swung by being pressed by the power pole in this way, the arm lock portion 274 of the gripping arm 270 enters while being guided by the locking groove 244c of the arm locking portion 244b as shown in FIG. .

  Then, as shown in FIGS. 12 and 14, when the utility pole is inserted to a position where it comes into contact with the support plate 253, and the base end side arm portion 280 is swung to a position aligned with the base frame portion 243 in plan view, The distal end of the distal arm 271 is swung to a position facing the support plate 253 with the electric pole in between (hereinafter, this swung position is referred to as a “closed position”). When the gripping arm 270 is swung to the closed position, as shown in FIG. 13, the arm locking portion 274 pushes down the locking piece 262 of the arm locking device 260 while being guided by the locking groove 244c. It automatically enters between the side frame portion 244. Thus, in a state where the arm lock portion 274 is positioned between the lock piece 262 and the arm side frame portion 244, the arm lock portion 274 contacts the lock piece 262 and the gripping arm 270 swings counterclockwise. Be regulated.

  In this closed position, the distal end portion (support roller 276) of the distal end side arm portion 271 faces the support plate 253 with the electrical pole in between, so that the electrical pole can be reliably held in the accommodation space 247. When releasing the swing lock of the gripping arm 270 located at the closed position, if the lock release piece 263 is pulled downward and the lock piece 262 is pushed downward, the contact of the arm lock portion 274 with the lock piece 262 is released. Then, the gripping arm 270 is returned to the open position by the elastic force of the torsion spring 256. If one end of a wire is attached to the unlocking piece 263 and the other end of the wire is hung on the ground, an operator located on the ground can use this wire to return the gripping arm 270 to the open position. It can be carried out.

  As described above, the utility pole support device 240 is configured to automatically lock the gripping arm 270 in the closed position after the gripping arm 270 is swung to the closed position by the stored power pole. There is no need for an oscillating actuator, and it is simple, lightweight and reliable in operation. Further, when the utility pole is accommodated in the accommodation space 247, the gripping arm 270 is automatically swung and held in the closed position by using the movement of the utility pole, so that the utility pole gripping operation is simplified, and the building pole Work can be performed efficiently. Furthermore, since the utility pole support device 240 is provided with the support plates 252, 253, and 254 made of a resin material in a portion that comes into contact with the utility pole accommodated in the accommodation space 247, the surface of the utility pole accommodated and held can be damaged. Absent.

  By the way, when the gripping arm 270 is swung by the electric pole inserted into the accommodation space 247, the arm lock portion 274 enters the locking groove 244c and is guided in the vertical direction, and is also guided by the locking groove 244c. Then, the lock piece 262 is pushed down to move to the back side of the lock piece 262, and the lock state (the holding arm 270 is held in the closed position) is obtained. In this locked state, the arm lock portion 274 enters the locking groove 244c and is restricted from moving up and down. Therefore, even when a vertical force is applied to the grip arm 270, the arm lock portion 274 is Moving over the lock piece 262 and moving to the near side, that is, the locked state can be reliably prevented from being arbitrarily released. In the locked state, when a vertical force or a twisting force about the arm shaft member 255 acts on the gripping arm 270, this force is received by the arm lock portion 274 (the locking groove 244 c) and the arm shaft member 255. Therefore, excessive force does not act on the arm shaft member 255, and the arm shaft member 255 can be prevented from being damaged.

  Although the utility pole support device 240 has been described so far, the utility pole support device 340 shown in FIG. 15 can be used instead of the utility pole support devices 40, 70, 240. FIG. 15 shows a front view of a state in which the hook 18 is hung on the rope 8 tied to the upper pole UD, the upper pole UD is lifted, and the upper pole UD is supported by the utility pole support device 340. The utility pole support device 340 is attached to the side of the boom head 20 via the sheave pin 24 in the same manner as the utility pole support device 40 described above.

  The utility pole support device 340 is configured by attaching an outer support member 341 and an inner support member 342 to a body frame (not shown). The support members 341 and 342 are attached to the main body frame so that the attachment interval between the outer support member 341 and the inner support member 342 in the left-right direction in FIG. 15 is slightly larger than the diameter of the upper column UD. The inner support member 342 is attached to the main body frame so as to be positioned below the outer support member 341.

  For this reason, in the utility pole support device 340, when the upper pole UD is supported so as to be sandwiched between the outer support member 341 and the inner support member 342, the counterclockwise rotation centering on the outer support member 341 of the upper pole UD is provided. Since the inclination is regulated by the inner support member 342, the upper column UD can be lifted up in a substantially vertical direction. Therefore, when the upper pole UD is supported by the utility pole support device 340, it becomes easy to align the flange portion of the upper pole UD and the flange portion of the lower pole LD, and the connection work between the upper pole UD and the lower pillar LD is efficient. Can be done well. In addition, if the space | interval of the outer side support member 341 and the inner side support member 342 in the left-right direction of FIG. 15 is enlarged, or if the vertical space | interval of the outer side support member 341 and the inner side support member 342 is enlarged, these support members 341 and 342 will be shown. It is possible to reduce the required strength. 15 illustrates a configuration in which one inner support member 342 is provided for one outer support member 341, but the number of outer support members and inner support members takes into account the strength of the support members and the like. Therefore, it can be changed as appropriate.

13 Boom 17 Wire 20 Boom head (tip)
23 Sheave 24 Sheave pin (Rotating shaft of sheave)
40 Telephone pole support device 41 Body frame (main body member)
46 Frame side roller (roller member)
47 Storage space 50 Opening / closing arm (opening / closing member)
54 Arm side roller (roller member)
D Split pillar

Claims (5)

A power pole support device that supports at least the upper part of a power pole that is hung using a wire or the like that is hung through a sheave that is rotatably provided at the tip of the boom. There,
A main body member provided with an accommodation space capable of accommodating the upper part of the utility pole, attached to the tip of the boom so as to be swingable about the same axis as the rotation axis of the sheave;
The body member swings according to the boom movement of the boom,
A power pole support device, wherein a position of a center of gravity is set so that the main body member is substantially horizontal.   2. The utility pole support device according to claim 1, wherein the main body member has an opening in one of a side, a front, and a rear of the tip of the boom.   3. The utility pole support device according to claim 2, wherein the main body member includes an opening / closing member that is movable between an open position that opens the opening and a closed position that closes the opening.   At least one of the main body member and the opening / closing member is a roller that is provided to face the accommodation space and is rotatable about a rotation axis that is substantially orthogonal to the axial direction of the utility pole accommodated and supported in the accommodation space. The utility pole support device according to claim 3, further comprising a member.   The main body member is located on one side of the tip of the boom and attached to the tip, and is attached to the tip of the boom on the other side of the boom tip. The utility pole support device according to any one of claims 1 to 4, wherein the utility pole support device is selectively and detachably attached to the other side attachment position.

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