JP2012055156A - Crane device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crane device capable of hoisting electrical equipment to a sufficient height near an electrical equipment fitting body, even if the electrical equipment fitting body is fixed to a portion in the vicinity of an upper end of a pole, when the electrical equipment which is a heavy object is mounted to the electrical equipment fitting body, such as a crossarm, fixed on the pole or a building frame of a building.SOLUTION: The crane device A1 assists work for hoisting the electrical equipment 8 when the electrical equipment 8 is mounted to the crossarms 90, 91 fixed on the pole. The crane device A1 includes: a beam member 1 having an eye bolt 10; a front support leg 2 and a rear support leg 4 which support the beam member 1; and attachment members 5, 5a mounting the front support leg 2, the rear support leg 4 and the beam member 1 to the crossarms 90, 91. A height of a pulley 6 mounted to the eye bolt 10 when the front support leg 2 and the beam member 1 are mounted to the crossarms 90, 91 is set to be a height capable of hoisting the electrical equipment 8 to the height of the crossarms 90, 91 by a wire rope 7.

Description

  The present invention relates to a lifting device. More specifically, when attaching heavy electrical equipment such as switches and transformers mainly to the armrests etc. on the power pole, even if the armrest is fixed near the upper end of the power pole, the electrical equipment is close to the armrest. The present invention relates to a lifting device that can be lifted to a sufficient height and performs a lifting operation.

  Electric devices such as switches and transformers mounted on the power pole are regularly replaced. Normally, an aerial work vehicle with a gondola is used for this replacement work. However, if there is an obstacle nearby and the high work vehicle cannot be entered, the worker goes up to the utility pole and replaces it. Doing work. As described above, as an apparatus for assisting an operator in handling an electric device that is a heavy object on an electric pole, for example, there is a pole mounting lifting apparatus described in Patent Document 1.

  This pole-mounted lifting device includes a pole mounting member that is attached to a power pole, an arm member that is attached to the pole mounting member, and a guide rail that is provided on the arm member and that is inclined toward the distal end side of the arm member. And a support member that is movably guided along the guide rail. The support member is provided with a suspension portion for suspending lifting means for lifting the device. A tensioning means is interposed between the bases, and the support member can be moved in a direction along the guide rail by operating the tensioning means in a state where the device is lifted by the lifting means. Thus, an electric device such as a transformer installed on the utility pole can be lifted so that its position can be freely adjusted.

JP2007-202339

However, the conventional columnar hoisting apparatus has the following problems.
In other words, many of the electric devices are attached to a brace that is fixed to the utility pole. In many cases, the brace is fixed near the upper end of the utility pole.
When attaching an electric device to the armrest, if the armrest is fixed near the upper end of the utility pole, there is no space for attaching the arm member above the armrest of the utility pole, and a pole mounted lifting device was used. The lifting work could not be performed.

Also, if the arm metal is fixed near the upper end of the utility pole, even if the arm member can be attached above the arm metal of the utility pole, the arm member and arm metal are too close, so Coupled with the fact that the device is designed to suspend lifting means such as a pulley and an electric hoist on an arm member, it has been difficult to suspend an electric device to a sufficient height close to a brace.
For this reason, when attaching a lifted electrical device to a brace, it is necessary for the operator to lift it up to the installation height, so the burden on the operator on the utility pole is extremely high, and there is a problem in work safety. . This also has the same problem as described above when not only the utility pole but also the brace and the angle member are attached to the housing of the building.

(Object of the present invention)
In the present invention, when an electric device that is a heavy object such as a switch or a transformer is attached to an electric device mounting body such as a metal brace fixed on a power pole or a housing of a building, the electric device mounting body is near the upper end of the electric pole. Even if it is fixed to the electrical equipment, the electrical equipment can be lifted to a sufficient height close to the electrical equipment mounting body, and the worker on the power pole can easily fix the lifted electrical equipment to the electrical equipment mounting body. An object of the present invention is to provide a lifting device that reduces the burden on the vehicle and improves the safety of work.

Means taken by the present invention to solve the above problems are as follows.
(1) The present invention
A lifting device that is installed on an electric equipment mounting body provided on a utility pole or a building and used for the work of lifting or hanging electric equipment,
A beam member having a required length;
A pulley element provided at or near the tip of the beam member;
One or more support members for supporting the beam member from below;
A mounting means provided at a lower end of the support member, for mounting on the electric equipment mounting body;
With
When installed on the electrical equipment mounting body, the pulley element is located above the electrical equipment mounting body,
It is a lifting device.

(2) The present invention
The support member includes a first support member provided on the front end side in the longitudinal direction of the beam member and a second support member provided on the rear end side, and the first support member and the second support member The lower end has a shaft element arranged in the vertical direction, and the attachment means provided at the lower ends of the first support member and the second support member rotate in the horizontal direction around the shaft element. Installed so that it can
It is a lifting apparatus of said (1).

(3) The present invention
The support member includes a first support member provided on the front end side in the longitudinal direction of the beam member, and a second support member provided on the rear end side, and the lower end of the second support member has a vertical position. An attachment means having a shaft element arranged in a direction and provided at a lower end of the second support member is attached so as to be able to rotate in a horizontal direction around the shaft element.
It is a lifting apparatus of said (1).

(4) The present invention
The first support member is formed longer than the second support member so that the front end side of the beam member is positioned higher than the rear end side.
The lifting device according to any one of (1) to (3).

(5) The present invention
The first support member is attached so that it can be folded along the beam member via a hinge element.
It is a lifting apparatus of said (4).

(6) The present invention
The second support member includes a bottom wall and a pair of side walls that are erected from both ends of the bottom wall and confront each other across the bottom wall, and are a space surrounded by the pair of side walls and the bottom wall The beam member is accommodated in the shaft element, and is attached through the side wall and the beam member by the shaft element.
The lifting device according to any one of (2) to (5).

The term “electric equipment mounting body” in the present specification and claims refers to a member assembled with an angle member attached to a housing of a building, in addition to a brace attached to a utility pole. Used to include.
In addition, the term “pulley element” in the present specification and claims is intended to include various known means that can lift and suspend heavy objects such as pulleys, electric hoists, chain blocks, and the like. I use it.

(Function)
The operation of the lifting device according to the present invention will be described.
An operator lifts the lifting device on the electric pole, and attaches the supporting member to the electric equipment mounting body such as a brace fixed to the upper portion of the electric pole by the attaching means, so that the lifting device is Install on the body.
When the lifting device is mounted, the beam member is above the electric equipment mounting body, and the beam member is supported by the support member, so that the pulley element provided on the beam member is positioned higher than the electric equipment mounting body. is there.

  The worker on the utility pole works with the worker on the ground to lift an electrical device such as a switch using a pulley element. In the lifting device, since the pulley element provided on the beam member is located at a sufficiently high position from the electric equipment mounting body, the electric equipment is at the height of the electric equipment mounting body (for example, on the lower surface of the electric equipment mounting body, The height can be lifted up to or near the top.

  From this state, the worker on the utility pole performs the work of mounting the electric device on the electric device mounting body using a mounting bracket or the like. At this time, the worker attaches the heavy electric device to the conventional device. It is not necessary to lift up to the height of the electrical equipment mounting body like this, and it is only necessary to adjust the horizontal position by pushing and pulling horizontally while maintaining the height, reducing the physical burden on the operator Is done.

  The support member includes a first support member provided on the front end side in the longitudinal direction of the beam member and a second support member provided on the rear end side, and the first support member and the second support member The lower end has a shaft element arranged in the vertical direction, and the attachment means provided at the lower ends of the first support member and the second support member rotate in the horizontal direction around the shaft element. The thing attached so that it can do can adjust the attachment position of the attachment means with respect to an electric equipment mounting body. As a result, for example, even if there is a difference in the length of the electric equipment mounting body fixed on the utility pole, it can flexibly respond to each condition, and the lifting device can be attached in a stable state. it can.

  In the case where the first support member is formed longer than the second support member and the front end side of the beam member is positioned higher than the rear end side, the height of the pulley element provided at or near the front end portion of the beam member is increased. It can be set to a sufficient height that makes lifting work easier.

  The first support member attached so that it can be folded along the beam member via the hinge element can be folded and the outer shape of the lifting device can be reduced, so that it is easy to carry and store and easy to handle. Excellent.

  In the present invention, for example, when an electric device that is a heavy object such as a switch or a transformer is attached to a brace fixed on a power pole, the electric device can be connected even if the brace is fixed near the upper end of the power pole. Since it can be lifted up to the height of the armrest or a sufficient height in the vicinity, the work of fixing the lifted electrical equipment to the armrest can be easily performed, reducing the burden on the operator on the utility pole. A lifting device capable of improving work safety can be provided.

The perspective view which shows 1st Embodiment of the lifting apparatus which concerns on this invention. Explanatory drawing which shows the use condition of the lifting apparatus shown in FIG. The perspective view which shows 2nd Embodiment of the lifting apparatus which concerns on this invention. The perspective view which shows 3rd Embodiment of the lifting apparatus which concerns on this invention. Explanatory drawing which shows the use condition of the lifting apparatus shown in FIG. Explanatory drawing which shows the attachment structure of the supporting leg member with respect to a brace. Explanatory drawing which shows the state which folded the lifting apparatus.

The present invention will be described in detail based on the embodiments shown in the drawings.
Please refer to FIG.

  For example, the lifting device A1 is fixed to an upper end portion of a utility pole 9 (see FIG. 2 to be described later), and is attached to braces 90 and 91 which are electrical equipment mounting bodies for attaching electrical equipment such as a switch and a transformer. used. Note that the number of braces fixed at one place is not limited to two, and may be one.

  The lifting device A1 is provided with a beam member (beam) 1 made of wood and having a quadrangular prism shape. The beam member 1 is preferably formed of an insulator and may be made of plastic. The front end portion (left end portion in FIG. 1) of the beam member 1 is formed at a right angle to the longitudinal direction of the beam member 1, and the rear end portion is formed at an angle of 45 ° with respect to the longitudinal direction. A mounting hole 14 is formed near the rear end of the beam member 1 so as to penetrate between both side surfaces in a direction perpendicular to the side surface.

  An eyebolt 10 that is a hanging tool is fixed to the front end portion of the beam member 1. The eyebolt 10 inserts a bolt portion 100 from the lower surface side to the upper surface side in an attachment hole 11 provided through the upper and lower surfaces of the beam member 1, and projects a lower end ring 101 to the lower surface side of the beam member 1. A nut 102 is fastened and fixed to the upper end portion of the bolt portion 100. The attachment angle of the eyebolt 10 is set to 45 ° with respect to the longitudinal direction of the beam member 1, and when the beam member 1 is fixed at an angle of 45 ° with respect to the braces 90 and 91 fixed horizontally, The eyebolt 10 is in the vertical direction.

  On the lower surface side near the front portion of the beam member 1, an engagement recess 15 is formed so that the top surface is parallel to the longitudinal direction of the beam member 1. On the slightly lower side of the engaging recess 15, an attachment hole 12 is provided so as to penetrate between the upper and lower surfaces of the beam member 1. The mounting hole 12 is formed at an angle of 45 ° with respect to the longitudinal direction of the beam member 1, and is horizontal when the beam member 1 is fixed at an angle of 45 ° with respect to the braces 90 and 91 fixed horizontally. It is in the direction.

  In the vicinity of the engagement recess 15 on the lower surface side of the beam member 1, a front support leg 2 as a support member is attached. The front support leg 2 constitutes a first support member together with a front support 3 described later. The front support leg 2 is formed of a metal square tube. The front support leg 2 may be made of wood or plastic. The upper end portion of the front support leg 2 is formed at an angle of 45 ° with respect to the longitudinal direction. A mounting hole 20 is formed near the upper end of the front support leg 2 in a direction perpendicular to the longitudinal direction. The lower end portion of the front support leg 2 is formed in a direction perpendicular to the longitudinal direction. Further, a mounting hole 21 is formed near the lower portion of the front support leg 2 in a direction perpendicular to the longitudinal direction.

  The front support leg 2 first inserts the bolt 130 of the coupler 13 into the mounting hole 12 of the beam member 1 from the upper surface side of the beam member 1 and protrudes from the mounting hole 12 to the lower surface side of the beam member 1. The mounting hole 20 is fitted in the part, and the upper end of the front support leg 2 is further fitted, and the nut 131 is fastened and fixed to the bolt 130. Thereby, the front support leg 2 is configured to be in the vertical direction when the beam member 1 is fixed at an angle of 45 ° with respect to the arm brackets 90 and 91 fixed horizontally. In addition, the insertion direction of the bolt 130 of the connector 13 may be opposite to the above.

A front support 3 as a support member is attached to the lower part of the front support leg 2. The front support 3 has a shape obtained by bending a metal elongated rectangular plate into a U shape, and constitutes a movable member together with the rear support 4 described later. A through hole (reference numeral omitted) is formed in the front support 3 near the tip of the side plates 30 and 31 parallel to each other, and a through hole (reference numeral omitted) is also formed in the bottom plate 32.
The front support 3 is fitted so that the front support legs 2 are sandwiched between the side plates 30 and 31, and the connection tool made up of bolts and nuts in the mounting holes 21 of the front support legs 2 and the through holes of the side plates 30 and 31. 33, and is attached so as to be rotatable around the connector 33. The front support 3 is configured such that the upper surface of the bottom plate 32 does not hit the lower end of the front support leg 2 when rotating.

An attachment member 5 as attachment means is attached to the lower part of the front support 3. The attachment member 5 has a shape obtained by bending a metal elongated rectangular plate into a U-shape, and a through hole 55 (upper and lower through holes are visible in FIG. 1) near the distal ends of the side plates 50 and 51 parallel to each other. Is not formed) and is formed at six locations, and the top plate 52 is also formed with through holes (reference numerals omitted).
The attachment member 5 passes through the through hole of the top plate 52 and the through hole of the bottom plate 32 of the front support member 3 through the connecting member 53 that is a shaft element composed of a bolt and a nut, and the axis of the bolt of the connecting member 53 is the center. It is attached so as to be rotatable in the direction of rotation.

  The upper and lower through holes 55 of the through holes 55 of the side plates 50 and 51 are each provided with a total of four fasteners 54 including bolts and nuts as shown in FIG. The interval between the side plates 50 and 51 is slightly wider than the lateral width of the arm brackets 90 and 91 to which the lifting device A1 is attached, and the interval between the fasteners 54 attached to the upper and lower through holes 55 is the arm bracket. It is formed to be slightly wider than the vertical width of 90, 91.

Near the rear end of the beam member 1, a rear support 4 as a second support member is attached. The rear support 4 has a shape obtained by bending a metal elongated rectangular plate wider than the front support 3 into a U shape. A through hole (reference numeral omitted) is formed in the rear support 4 near the tip of the side plates 40 and 41 parallel to each other, and a through hole (reference numeral omitted) is also formed in the bottom plate 42.
The rear support 4 is fitted so that the beam member 1 is sandwiched between the side plates 40 and 41, and the connecting member 43 which is a shaft element composed of a bolt and a nut in the mounting hole 14 of the beam member 1 and the through hole of the side plates 40 and 41. And is attached so as to be rotatable around the connector 43.

An attachment member 5 a having the same structure as that of the attachment member 5 is attached to the lower part of the rear support 4. The attachment member 5a has a shape obtained by bending a metal elongated rectangular plate into a U-shape, and through holes 55a are formed at six locations near the tip portions of the side plates 50a and 51a parallel to each other. In addition, through holes (reference numerals omitted) are also formed in the top plate 52a.
The attachment member 5a passes through the through hole of the top plate 52a and the through hole of the bottom plate 42 of the rear support 4 through the connecting member 53a which is a shaft element composed of a bolt and a nut, and rotates around the axis of the bolt of the connecting member 53a. It is attached so as to be rotatable in the direction.

  Of the through holes 55a of the side plates 50a, 51a, the upper and lower through holes 55a are attached with a total of four fasteners 54a made of bolts and nuts. The intervals between the side plates 50a and 51a are slightly wider than the lateral widths of the braces 90 and 91 to which the lifting device A1 is attached, and the intervals between the fasteners 54a attached to the upper and lower through holes 55a are as follows. It is formed to be slightly wider than the vertical width of 90, 91.

  The attachment members 5 and 5a are inserted into the braces 90 and 91 in the spaces formed inside the four fasteners 54 and 54a and slid to an appropriate position. It can be attached to the braces 90 and 91 by tightening as necessary. Further, among the through holes 55, 55a of the attachment members 5, 5a, the through hole 55a in the middle in the vertical direction is an angle with a smaller thickness or width than the member for attaching the lifting device A1, not a general arm metal, etc. In this case, the upper side fasteners 54, 54a are replaced and used.

  If the mounting holes are formed in advance on the upper and lower surfaces of the arm brackets 90 and 91, the attachment members 5 and 5a are not used, and the front support member 3 and the rear support member 4 are connected to the connection members 53 and 53a. Then, it can be directly fixed to the arm brackets 90 and 91. Further, since the attachment members 5 and 5a are rotatable in the direction of turning around the axis of the bolts of the coupling members 53 and 53a, when the lifting device A1 is attached to the braces 90 and 91 as will be described later. In addition, it is possible to make the direction in the plan view of the beam member 1 with respect to the arm brackets 90 and 91 slant without trouble.

  Further, since the front support 3 can rotate freely with the connecting tool 33 as an axis and the angle can be changed similarly, the rear support 4 can change the angle with the connecting tool 43 as an axis. When the lifting device A1 is attached to the braces 90, 91, the distance between the attachment members 5, 5a can be finely adjusted, and there is an advantage that the attaching operation is easy.

(Function)
With reference to FIG.1 and FIG.2, the effect | action of the lifting apparatus A1 is demonstrated in the case where the switch 8 is newly attached on a utility pole. In FIG. 2, the worker is not shown.

  First, an operator lifts the lifting device A1 onto the electric pole and attaches it to the upper and lower arm 90, 91 fixed to the upper part of the electric pole 9 at the same height. As shown in FIG. 2, the lifting device A <b> 1 attaches the attachment member 5 on the front support leg 2 side to one arm 90 and attaches the attachment member 5 a on the rear side of the beam member 1 to the other arm 91. Attached to the brace 90 and 91.

  In this attachment position, for example, when the lifting work is difficult due to obstacles such as house eaves and tree branches around the utility pole, the attachment position of the attachment members 5 and 5a is set to the brace 90, for example. , 91, or attached to only one arm 90 or 91 to change the lifting position to avoid obstacles.

  Since the interval at which the attachment members 5 and 5a of the beam member 1 are provided is wider than the interval at which the arm members 90 and 91 are provided, the attachment position of the attachment member 5 is closer to the tip of the arm member 90, The attachment position of the attachment member 5a is closer to the middle of the arm bracket 91. As a result, the hanging position by the eyebolt 10 is in the vicinity of the tip of the brace 90, and it is easy to suspend the column after the electric device is lifted or removed.

  Further, in a state where the lifting device A1 is attached to the arm metal 90, 91, the beam member 1 is above the arm metal 90, 91, and the beam member 1 is supported by the front support leg 2. Thus, the beam member 1 is inclined so that the eyebolt 10 side becomes higher, and the eyebolt 10 is at a relatively high position.

  A pulley 6 as a pulley element is attached to the ring 101 of the eyebolt 10. The lifting device A1 previously attached with the pulley 6 also constitutes the lifting device (not shown) of the present invention. A wire rope 7 is hung on the pulley 6, and a worker on the utility pole and a worker on the ground cooperate to lift the switch 8, which is an electrical device, with the wire rope 7. The lifting position of the switch 8 (the hanging position of the wire rope 7 on the mounting side with respect to the switch 8) is a position slightly forward and outward from the tip of the arm 90.

  In the lifting device A1, the pulley 6 suspended from the ring 101 of the eyebolt 10 of the beam member 1 is at a sufficiently high position from the arm brackets 90 and 91. 80 can be lifted up to a height that is substantially in contact with the lower surfaces of the braces 90 and 91. In FIG. 2, for convenience, the height of the switch 8 is shown at a position slightly lower than the lower surfaces of the arm brackets 90 and 91.

The worker on the utility pole performs the work of attaching the switch 8 to the arm 90 using the fixture 92 from the state where the switch 8 is lifted to the height. The fixture 92 is composed of four J-shaped suspension bolts 920 and two suspension plates 921. Each suspension bolt 920 is attached in advance to the hanging bracket 80 of the switch 8, and each suspension plate 921 has a notch portion. The hole on the side without a gap is fitted into the threaded portion of the two suspension bolts 920, and the nut is screwed and temporarily fixed.
Then, when attaching to the arm metal 90, each suspension plate 921 is opened and the arm metal 90 is passed through, and then each suspension plate 921 is closed, and the hole on the side having the notch portion is threaded portion of the other suspension bolt 920. And is fixed to the brace 90 by tightening with a nut.

  At that time, it is not necessary for the operator on the utility pole to lift the heavy load switch 8 and the horizontal direction is maintained while maintaining the height when the switch is lifted (in FIG. 2, the middle portion of the arm 90). To the desired position and fixed as described above. Therefore, it is possible to reduce the burden on the operator and to perform the work safely without requiring much force for the work of fixing the switch 8 to the arm metal 90 after lifting.

  In addition, if the lifting apparatus A1 is used, the switch 8 can be suspended by a procedure generally reverse to the case where the switch 8 is lifted as mentioned above. Therefore, when replacing an electrical device such as the switch 8, first, the old electrical device is first removed from the arm bracket 90, the electrical device is hung using the lifting device A 1, and then new as described above. The lifting work and the mounting work of electrical equipment such as the switch 8 will be performed.

Please refer to FIG.
In FIG. 3, the same or equivalent portions as those of the lifting device A <b> 1 are denoted by the same reference numerals, and redundant description of the structure is omitted.
The lifting device A2 includes a front support leg 2a. The front support leg 2 a has a structure in which the base portion is cut and the leg members 22 and 23 are connected by a hinge 24.

  The front support legs 2a are used by straightening the leg members 22 and 23 as in the case of FIG. Further, when transporting or storing, the movable leg member 23 of the leg members 22 and 23 can be fixed to the beam member 1 by tilting it toward the beam member 1 and tightening it with a band (not shown). it can. Thereby, since the lifting apparatus A2 can be folded and the outer shape can be gathered small, it is easy to carry and store and is excellent in handleability.

Please refer to FIG. 4 to FIG.
The lifting device A3 includes a beam member 1b formed of a metal square tube. The front end portion (left end portion in FIG. 4) of the beam member 1b is closed by the cover plate 16, and the rear end portion is opened.

  A hanging tool 17 formed of a metal rod-like body is fixed to the front end portion of the beam member 1b. The hanger 17 is an annular body having a lower end formed in an arc shape, and is fixed by welding, for example, at an angle of 45 ° with the axial direction of the beam member 1b. In addition, the hanging tool 17 is not limited to the said shape, For example, it can also be made into the structure which interrupted the upper part side and bent so that both the front-end | tips of a rod-shaped body might be hung on the upper surface of the beam member 1b.

  According to this structure, when the lifting apparatus A3 is used (see FIG. 5), the beam member 1b is inclined at an angle of about 45 ° with respect to the braces 90 and 91. As a result, the suspension 17 is vertically Direction. A pulley 6 is attached to the hanging tool 17. Further, the pulley 6 may not be attached in advance to the hanging tool 17 and may be separately procured and attached at the time of work.

  A front support leg 2b, which is a first support member, is attached to the lower surface side of the beam member 1b near the front. The front support leg 2b has a leg main body 22 formed of a metal square tube having a required length. A square end plate 23 is fixed to an end of the leg main body 22 on the attachment side (upper end in FIG. 4) so as to close the opening of the tubular body at an angle of 45 ° with respect to the longitudinal direction of the leg main body 22. ing.

  In addition, a square end plate 24 is fixed to the distal end portion (lower end portion) of the leg main body 22 so as to close the opening at an angle of 90 ° with respect to the longitudinal direction of the leg main body 22. A through hole 240 (see FIG. 6) is provided in the center of the end plate 24, and a fixing bolt 25 having a required length is passed through the through hole 240. The fixing bolt 25 is configured such that the head portion 250 is accommodated inside the end plate 24 so as not to come out, and a nut 252 is screwed to the screw portion 251. Further, a stopper (not shown) that prevents the fixing bolt 25 from entering the inside of the leg body 22 more than necessary is provided inside the leg body 22.

  The front support leg 2 b is attached to the lower surface of the beam member 1 b via a hinge 26 at the obtuse angle side (right side in FIG. 4) of the end plate 23 with respect to the leg body 22. As an alternative to the hinge 26, other known means for connecting the front support legs 2b so that they can rotate may be employed. Thereby, the front support leg 2b can be rotated within a range of about 45 ° around the axis of the hinge 26. Further, a magnetically bonded body 18 having a structure in which a permanent magnet is incorporated in a metal fitting is fixed to the lower surface side near the rear portion of the beam member 1b.

  The front support leg 2b can be set at an angle of about 45 ° with respect to the beam member 1b by raising the end plate 23 until it contacts the lower surface of the beam member 1b (see FIGS. 4 and 5). Further, the front support leg 2b can be rotated in the opposite direction to be magnetically attached to the magnetic body 18 on the front side, and can be folded so as to be substantially parallel to the beam member 1b. The beam member 1b and the front support leg 2b can be folded together with the band 27 (see FIG. 7).

  An attachment hole 19 penetrating in the lateral direction is provided on the side surface near the rear end of the beam member 1b, and a rear support 4b as a second support member is attached to the attachment hole 19. The rear support 4b has a shape obtained by bending a metal rectangular plate into a U shape, and constitutes a movable member. A through hole (reference number omitted) is formed near the tip (upper end) of the side plates 40 and 41 parallel to each other of the rear support 4b, and a through hole (reference number omitted) is also formed in the bottom plate 42. ing.

  The rear support 4b is fitted so that the beam member 1b is sandwiched between the side plates 40 and 41, and the mounting element 19 provided in the beam member 1b and the shaft element including bolts and nuts in the through holes of the side plates 40 and 41 are provided. The connecting tool 43 is passed through the connecting tool 43 so as to be rotatable about the connecting tool 43. When the rear support 4b rotates, the tip on the upper surface side of the beam member 1b hits a connecting member 53 described later, and stops the rotation of the beam member 1b in the upper surface direction at a required position. ing.

  An attachment member 5b is attached to the lower side of the rear support 4b. The attachment member 5b is formed by bending a metal rectangular plate into a U-shape, and a pair of through holes (not shown) are provided near the distal end portions (lower end portions) of the side plates 50 and 51 that are parallel to each other. The through hole (reference numeral omitted) is formed in the top plate 52.

  As shown in FIG. 4, a fastener 54 made of a bolt and a nut is passed through each side hole of the side plates 50 and 51. In addition, the space | interval of the side plates 50 and 51 is formed a little wider than the lateral width of the braces 90 and 91 to which the lifting apparatus A3 is attached. The attachment member 5b passes through a through hole of the top plate 52 and a through hole of the bottom plate 42 of the rear support member 4b through a connecting member 53 that is a shaft element made of a bolt and a nut, and the connecting member 53 is connected to the rear support member 4b. It is attached so as to be rotatable in the direction of turning about the axis of the bolt.

(Function)
The operation of the lifting device A3 will be described with reference to FIGS.
Moreover, in FIG. 5 which shows the state which installed the lifting apparatus A3 in the braces 90 and 91, illustration of the switch 8 and the wire rope 7 is abbreviate | omitted.
The usage method and operation after the lifting device A3 is installed on the arm 90, 91 are substantially the same as those of the lifting device A1, so the description thereof will be omitted, and the lifting device A3 is mainly used as the arm 90. , 91 will be described.

  First, the operator ascends on the utility pole with the lifting device A3, and attaches the lifting device A3 to the braces 90 and 91 that are fixed to the upper part of the utility pole 9 in parallel at the same height. In the lifting device A3, as shown in FIG. 5, the fixing bolt 25 on the front support leg 2b side is attached to one arm 90, and the attachment member 5b on the rear side of the beam member 1b is attached to the other arm 91. Attached to the brace 90 and 91.

  Specifically, as shown in FIG. 6, the fixing bolt 25 on the front support leg 2 b side is passed from the upper side to the mounting hole 93 penetrating in the vertical direction on the tip side of one arm 90, and the lower mounting hole A nut 252 is screwed onto a screw portion 251 protruding downward from 93 and is appropriately tightened and fixed. Further, the attachment member 5b of the beam member 1b is fitted into the arm metal 91 so that the arm metal 91 passes through the space above the fastener 54, and the attachment member 5b is stopped at an appropriate position. Tighten the nut 54 and fix it. The lifting device A3 can be installed more quickly because the fixing bolt 25 can be easily fixed.

  Note that the terms and expressions used in this specification are merely explanatory and are not limiting at all, and terms and expressions equivalent to the features described in this specification and parts thereof. There is no intention to exclude. Further, it goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

A1 Lifting device 1 Beam member 10 Eye bolt 100 Bolt portion 101 Ring 102 Nut 11 Mounting hole 12 Mounting hole 13 Connecting tool 130 Bolt 131 Nut 14 Mounting hole 15 Engaging recess
2 Front support leg 20 Mounting hole 21 Mounting hole 3 Front support tool 30, 31 Side plate 32 Bottom plate 33 Connection tool 4 Rear support tool 40, 41 Side plate 42 Bottom plate 43 Connection tool 5, 5a Attachment member 50, 51 Side plate 52 Top Plate 53 Connector 54 Fastening tool 55 Through hole 6 Pulley 7 Wire rope 8 Switch 80 Hanger A2 Lifting device 2a Front support leg 22, 23 Leg member 24 Hinge A3 Lifting device 1b Beam member 16 Cover plate 17 Hanging Lower tool 18 Magnetic body 19 Mounting hole 2b Front support leg 22 Leg body
23 End plate 24 End plate 240 Through hole 25 Fixing bolt 250 Head portion 251 Screw portion 252 Nut 26 Hinge 27 Band 4b Rear support 5b Mounting member 9 Electric pole 90, 91 Arm bracket 92 Fixing tool 920 Suspension bolt 921 Suspension plate 93 Mounting hole

Claims (6)

A lifting device that is installed on an electric equipment mounting body provided on a utility pole or a building and used for the work of lifting or hanging electric equipment,
A beam member having a required length;
A pulley element provided at or near the tip of the beam member;
One or more support members for supporting the beam member from below;
A mounting means provided at a lower end of the support member, for mounting on the electric equipment mounting body;
With
When installed on the electrical equipment mounting body, the pulley element is located above the electrical equipment mounting body,
Lifting equipment. The support member includes a first support member provided on the front end side in the longitudinal direction of the beam member and a second support member provided on the rear end side, and the first support member and the second support member The lower end has a shaft element arranged in the vertical direction, and the attachment means provided at the lower ends of the first support member and the second support member rotate in the horizontal direction around the shaft element. Installed so that it can
The lifting device according to claim 1. The support member includes a first support member provided on the front end side in the longitudinal direction of the beam member, and a second support member provided on the rear end side, and the lower end of the second support member has a vertical position. An attachment means having a shaft element arranged in a direction and provided at a lower end of the second support member is attached so as to be able to rotate in a horizontal direction around the shaft element.
The lifting device according to claim 1. The first support member is formed longer than the second support member so that the front end side of the beam member is positioned higher than the rear end side.
The lifting device according to any one of claims 1 to 3. The first support member is attached so that it can be folded along the beam member via a hinge element.
The lifting device according to claim 4. The second support member includes a bottom wall and a pair of side walls that are erected from both ends of the bottom wall and confront each other across the bottom wall, and are a space surrounded by the pair of side walls and the bottom wall The beam member is accommodated in the shaft element, and is attached through the side wall and the beam member by the shaft element.
The lifting device according to any one of claims 2 to 5.

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