Electric balancer device

Abstract

To improve the stability of a conventional electric balancer device.SOLUTION: An electric balancer device of the present invention comprises: a base; a support pole suspended from the base; a horizontal arm attached to the top of the support pole; and an electric balancer that suspends a load by winding it up with an electric motor using a rope guided by the horizontal arm, and controls the electric motor to balance the weight of the suspended load. The electric balancer is fixed to the top of the support pole or to the base of the horizontal arm. The horizontal arm is folded in half, and is provided with a rope length adjustment unit that adjusts the length of the rope guided by the horizontal arm as the horizontal arm bends.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to an electric balancing device, and more particularly to an electric balancing device of the rope winding type that uses, for example, a bifold-type horizontal arm. [Background technology]

[0002] Conventionally, in order to reduce the burden on workers when manufacturing, assembling, or transporting goods, there has been an electric balancer device that controls an electric motor for winding up a rope to balance the weight of the load and suspend the load, thereby allowing the load to be lifted, lowered, or moved with only a small operating force when, for example, lifting, lowering, or moving a heavy load.

[0003] The above-mentioned rope includes all flexible long bodies such as chains and strings.

[0004] FIG. 15 shows a conventional electric balancer device, in which 1 is a base placed on the ground or fixedly installed, 2 is a support pole installed vertically on the base 1, 3 is a horizontal arm fixed to the upper end of the support pole 2 or installed so that it can tilt freely within a horizontal plane, and 4 is an electric balancer installed so that it can move freely along the horizontal arm 3.

[0005] In the conventional electric balancer device, the hanging rope 4a of the electric balancer 4 is unwound downward, and a heavy load 5 is hung from a hanging hook 4b attached to the end of the rope 4a, and the electric motor (not shown) of the electric balancer 4 controls the winding force of the hanging rope 4a to balance (equalize) the weight of the heavy load 5 with the upward pulling force of the electric motor of the electric balancer 4.

[0006] This allows the heavy load 5 to be suspended in a balanced state at a predetermined height, and the worker can move the heavy load 5 along the horizontal arm 3 with little force, and also tilt the horizontal arm 3 in a horizontal plane to move the heavy load 5 to a predetermined location, thereby reducing the burden on the worker.

[0007] For example, Patent Document 1 discloses an electric balancer device. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] International Publication No. 2004 / 056689 Summary of the Invention [Problem to be solved by the invention]

[0009] However, since the electric balancer 4 of the above-mentioned conventional electric balancing device has a horizontal arm 3 that is slidable, it is not possible to install a heavy electric balancer 4 due to the strength and balance of the horizontal arm 3, and as a result, there are cases where it is not possible to hang a heavy load.

[0010] The present invention is intended to eliminate the above drawbacks. [Means for solving the problem]

[0011] The electric balancer device of the present invention comprises a base, a support pillar suspended from the base, a horizontal arm extending horizontally at the top of the support pillar, and an electric balancer that suspends a load by winding it up with an electric motor using a rope guided by the horizontal arm, and controls the electric motor to balance the weight of the suspended load and suspend it, and is characterized in that the electric balancer is fixed to the top of the support pillar.

[0012] The electric balancer is fixed to the tip of an arm portion provided on the upper part of the support pillar and extending in the opposite direction to the extension direction of the horizontal arm.

[0013] The electric balancer device of the present invention comprises a base, a support pillar suspended from the base, a horizontal arm extending horizontally from the top of the support pillar, and an electric balancer that suspends a load by winding it up with an electric motor using a rope guided by the horizontal arm, and controls the electric motor to balance the weight of the suspended load and suspend it, and is characterized in that the electric balancer is provided at the base of the horizontal arm.

[0014] The electric balancer is fixed to the tip of an arm portion provided at the base of the horizontal arm and extending in the opposite direction to the extension direction of the horizontal arm.

[0015] In addition, the electric balancer device of the present invention is characterized in that the horizontal arm is divided into a plurality of horizontal arm sections, and each of the adjacent horizontal arm sections includes a first horizontal arm section on the base side of the horizontal arm of the adjacent horizontal arm section, and a second horizontal arm section on the tip side of the horizontal arm, the base of which is provided at the tip of the first horizontal arm section so as to be able to tilt freely via a pivot shaft, and the first horizontal arm section has a guide section that guides a suspension rope of the electric balancer, extending from the base of the first horizontal arm section to the tip of the second horizontal arm section along the first horizontal arm section and the second horizontal arm section, and the electric balancer device is further characterized in that the electric balancer device is provided with a rope length adjustment section that adjusts the length of the suspension rope guided by the guide section in accordance with changes in the distance from the base of the first horizontal arm section, via the guide section, to the tip of the second horizontal arm section when the second horizontal arm section is tilted relative to the first horizontal arm section from a predetermined angle at which it can be opened to a predetermined angle in a predetermined rotational direction.

[0016] Further, the guide section comprises a base-side guide section provided at the base of the first horizontal arm section, a bending-side guide section provided at the tip of the first horizontal arm section or at the base of the second horizontal arm section, and a tip-side guide section provided at the tip of the second horizontal arm section, the bending-side guide section being provided at a predetermined distance from the pivot shaft in the tip direction of the first horizontal guide section, and being provided at a predetermined distance from an axis connecting the base-side guide section, the pivot shaft, and the tip-side guide section in a direction opposite to the tilting direction of the second horizontal arm section when the second horizontal arm section is in a state of being maximally opened and at a desired angle with respect to the first horizontal arm section, The lobe length adjustment unit comprises a sheave piece of a predetermined length that is provided at the base of the second horizontal arm in the direction in which the second horizontal arm tilts and that crosses the line connecting the pivot shaft and the tip side guide unit, and a sheave side guide unit provided at the tip of the sheave piece, and is characterized in that the rope is guided from the base side guide unit to the bending side guide unit via the sheave side guide unit, and the sheave side guide unit is moved toward or away from the line connecting the base side guide unit and the pivot shaft in accordance with the tilt of the second horizontal arm unit 8b, thereby adjusting the length of the rope guided between the base side guide unit and the bending side guide unit 10c.

[0017] The platform is also characterized by having a foldable outrigger device that secures the platform to the platform surface.

[0018] The outrigger device also comprises a pair of one outrigger element and the other outrigger element, and each of the outrigger elements comprises a support portion fixed on the base, a first support arm portion having a base portion tiltably attached to the support portion, and a second support arm portion having a base portion tiltably attached to the tip of the first support arm portion, and is characterized in that it comprises a fixing means for fixing the first support arm portion and the second support arm portion together in a first position in which the first support arm portion and the second support arm portion are folded upright, and a fixing means for fixing the first support arm portion and the second support arm portion together in a second position in which the first support arm portion tilts horizontally and the second support arm portion is perpendicular to the first support arm portion, with the lower end of the second support arm portion placed on the ground. [Effects of the Invention]

[0019] According to the present invention, the electric balancer device can be used stably. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 2 is a side view for explaining the electric balancer device of the present invention. [Figure 2] 10 is a reference photograph showing the state of use of the electric balancer device of the present invention. [Figure 3] FIG. 2 is a plan view for explaining a linear horizontal arm of the electric balancer device of the present invention. [Figure 4] FIG. 2 is a plan view illustrating the horizontal arm of the electric balancer device of the present invention in a bent state. [Figure 5] 5A to 5C are explanatory diagrams illustrating the operation of the electric balancer device of the present invention. [Figure 6] FIG. 2 is a plan view for explaining a linear horizontal arm of the electric balancer device of the present invention. [Figure 7] FIG. 2 is a plan view illustrating the horizontal arm of the electric balancer device of the present invention in a bent state. [Figure 8] FIG. 2 is a plan view illustrating the horizontal arm of the electric balancer device of the present invention in a maximally bent state. [Figure 9] FIG. 10 is an image diagram of the winding length of the suspension rope of the electric balancer device of the present invention. [Figure 10] 10A and 10B are diagrams showing fluctuations in rope length when the electric balancing device of the present invention has a rope length adjustment unit and when it does not have one. [Figure 11] 10 is a reference photograph showing a base of the electric balancer device of the present invention. [Figure 12] FIG. 2 is an explanatory side view showing the electric balancer device of the present invention in a folded state. [Figure 13] FIG. 2 is an explanatory side view showing a state in which the electric balancer device of the present invention is in the middle of being opened. [Figure 14] FIG. 2 is an explanatory side view showing the electric balancer device of the present invention in an opened and installed state. [Figure 15] FIG. 10 is an explanatory side view of a conventional electric balancer device. DETAILED DESCRIPTION OF THE INVENTION

[0021] Examples of modes for carrying out the present invention are given below. [Example]

[0022] A first embodiment of the present invention will be described with reference to FIGS.

[0023] (1. Overall explanation of the electric balancer device)

[0024] As shown in FIG. 1, the electric balancer device of the present invention comprises a platform 6 that can be moved freely on the ground (including all surfaces on which a platform can be placed, such as floors, truck beds, other vehicles, mobile objects, etc.) by means of wheels (not shown) attached to the bottom end, a support pillar 7 suspended from the platform 6, a horizontal arm 8 attached to the top of the support pillar 7, an electric balancer 9 attached to the top of the support pillar 7, a suspension rope 9a that is reeled out (pulled out) from the electric balancer 9, a rope guide unit 10 that guides the suspension rope 9a reeled out from the electric balancer 9 from the base to the tip of the horizontal arm 8, and a hanging guide unit 10a that causes the rope 9a, guided by the rope guide unit 10 to hang down to the tip of the horizontal arm 8.

[0025] Furthermore, as will be described later, if necessary, a rope length adjustment section 11 may be provided to adjust the length of the suspension rope 9a guided by the rope guide section 10 in accordance with changes in the distance from the base to the tip of the horizontal arm 8 via the rope guide section 10 by bending the horizontal arm in half.

[0026] In addition, when the horizontal arm 8 can be folded into three or more parts, the rope length adjustment part 11 may be provided on each of the adjacent horizontal arm parts.

[0027] (Explanation of horizontal arm 8)

[0028] As shown in Figures 1 to 5, the horizontal arm 8 comprises, for example, a first horizontal arm portion 8a having a base fixed or tiltable (rotatable) in a horizontal plane at the top of the support 7, and a second horizontal arm portion 8b having a base tiltable in a horizontal plane at the tip of the first horizontal arm portion 8a.

[0029] In addition, reference numeral 13 in FIG. 5 denotes a pivot shaft that pivotally supports the tip end of the first horizontal arm portion 8a and the base end of the second horizontal arm portion 8b so that they can tilt freely.

[0030] In addition, when the first horizontal arm portion 8a is tiltable (rotatable) relative to the support column 7, the first horizontal arm portion 8a is arranged so as to be tiltable (rotatable) freely around the support column 7 in a horizontal plane, for example, within a range of 0 degrees to 360 degrees.

[0031] Furthermore, the second horizontal arm portion 8b is tiltable relative to the first horizontal arm portion 8a within a range from a position where the second horizontal arm portion 8b has a rotation angle of 0 degrees relative to the first horizontal arm portion 8a, based on the position where the first horizontal arm portion 8a and the second horizontal arm portion 8b are in a straight line with a maximum open angle of, for example, 180 degrees, as shown in Figure 3, to a position where the first horizontal arm portion 8a and the second horizontal arm portion 8b are folded, for example, at a rotation angle of 160 degrees, as shown in Figure 4.

[0032] The second horizontal arm portion 8b is formed so that it can tilt only within a range in one direction of rotation, for example, based on a position where it is in a straight line 180 degrees apart from the first horizontal arm portion 8a, and will not tilt in the opposite direction from the straight line position.

[0033] Furthermore, even if the first horizontal arm portion 8a and the second horizontal arm portion 8b do not open to, for example, 180 degrees and the maximum open angle is a predetermined angle less than 180 degrees, they may be formed so that, similarly to the above, they tilt only within a range on one rotational direction side of the folding side from the predetermined angle, using the position at the maximum open angle as a reference, and do not tilt in the opposite direction from the predetermined maximum open angle.

[0034] The rotation angle of the second horizontal arm portion 8b may be varied depending on the electric balancer device.

[0035] In the above example, the horizontal arm 8 is a two-fold horizontal arm consisting of a first horizontal arm portion 8a and a second horizontal arm portion 8b, but the first horizontal arm portion 8a and the second horizontal arm portion 8b may each be further divided into multiple horizontal arm portions, and the horizontal arm 8 may be a multi-stage folded horizontal arm having three or more stages.

[0036] In this case, each adjacent horizontal arm portion is formed so that it can tilt only within a range on one side of the rotation direction, using a position that is, for example, 180 degrees apart as a reference, in a straight line, and cannot tilt in the opposite direction, as described above.

[0037] (Explanation of Electric Balancer 9)

[0038] The electric balancer 9 is a winding-type electric balancer that winds up a suspending rope 9a using an electric motor, and is configured to balance the weight of the suspended heavy object using a tensile force control device or the like.

[0039] The electric balancer 9 is hung from the tip of an arm 12 attached to the support 7, for example.

[0040] Furthermore, by providing the arm portion 12 on the support 7 on the opposite side of the support 7 from the side on which the horizontal arm 8 is provided, and by providing the electric balancer 9 at a position a predetermined distance away from the support 7, the weight of the support 7 can be balanced by the horizontal arm 8 and the electric balancer 9 provided on either side of the support 7.

[0041] In addition, in the case where the horizontal arm 8 is capable of tilting freely relative to the support 7, instead of attaching the arm portion 12 to the support 7, it may be fixed to the base of the horizontal arm 8 in the direction opposite to the extension direction of the horizontal arm 8 so that it can tilt together with the horizontal arm 8.

[0042] At the tip of the rope 9a, for example, a hook 9b for hanging is provided.

[0043] (Explanation of rope guide part 10)

[0044] As shown in Figures 1 to 4, the rope guide portion 10 consists of a tip side guide portion 10b provided at the tip of the second horizontal arm portion 8b, a bent portion side guide portion 10c provided at the tip of the first horizontal arm portion 8a, and a base side guide portion 10d provided at the base of the first horizontal arm portion 8a.

[0045] In addition, when the horizontal arm 8 is divided into three or more parts, in each adjacent horizontal arm section, the horizontal arm section on the support 7 side corresponds to the first horizontal arm section 8a, and the horizontal arm section on the tip side of the horizontal arm 8 corresponds to the second horizontal arm section 8b.

[0046] The rope 9a is guided along the first horizontal arm portion 8a by the base side guide portion 10d and the bent portion side guide portion 10c, and the rope 9a is guided along the second horizontal arm portion 8b by the bent portion side guide portion 10c and the tip side guide portion 10b.

[0047] The hanging-side guide portion 10a is made up of, for example, a hanging-side rotating roller for extending horizontal rope 9a downward, which extends along horizontal arm 8. A non-rotating shaft may be used as the hanging-side guide portion 10a, instead of using the hanging-side rotating roller. The shaft is also installed horizontally.

[0048] It is also possible to omit the hanging-side guide portion 10a and have the rope 9a hang down while being guided along the second horizontal arm by the tip-end-side guide portion 10b.

[0049] The tip-side guide portion 10b is, for example, arranged to sandwich the hanging rope 9a from both sides and is composed of a pair of tip-side rotating rollers spaced a predetermined distance apart in the longitudinal direction of the second horizontal arm 8b. Instead of using the tip-side rotating rollers, a non-rotating shaft may be used as the tip-side guide portion 10b. The shaft is also arranged vertically.

[0050] The pair of tip-side rotating rollers are formed so that, together with the bent-side guide portion 10c, the rope 9a is guided along the second horizontal arm portion 8b, and the direction of the hanging rope 9a extending from the tip-side guide portion 10b to the hanging-side guide portion 10a is always constant, allowing the rope 9a to hang down stably from the hanging-side guide portion 10a.

[0051] 3 to 5, the bending portion-side guide portion 10c is, for example, a bending portion-side rotating roller. The bending portion-side rotating rotor is, for example, as shown in FIG. 3, provided at a predetermined distance from an axis A formed by a first line a1 connecting the base-side guide portion 10d of the horizontal arm 8 and the pivot shaft 13, which are aligned in a straight line (or at a desired maximum open angle), and a second line a2 connecting the pivot shaft 13 and the tip-side guide portion 10b, in the direction opposite to the folding direction of the horizontal arm, and is also provided at a predetermined distance from the pivot shaft 13 toward the tip side of the first horizontal arm portion 8a. Note that the bending portion-side guide portion 10c may be provided with a non-rotating shaft instead of the bending portion-side rotating roller. The shaft is provided in a vertical direction.

[0052] The bending section side rotating roller shifts the direction of the rope 9a from the axis A, so that tension is also generated in the short direction of the rope 9a, thereby preventing the hanging rope 9a from coming off from each of the guide sections.

[0053] The base-side guide portion 10d is, for example, configured to sandwich the hanging rope 9a from both sides and is composed of a pair of base-side rotating rollers spaced a predetermined distance apart in the longitudinal direction. Instead of using the base-side rotating rollers, a non-rotating shaft may be provided as the base-side guide portion 10d. The shaft is also configured in the vertical direction.

[0054] The pair of rotating rollers causes the direction of the rope 9a extending from the base side guide portion 10d to the bent portion side guide portion 10c to deviate from the axis A, so that tension is also generated in the short direction of the rope 9a, thereby preventing the rope 9a from coming off each rotating roller.

[0055] (Explanation of rope length adjustment part 11)

[0056] When the guide portion 10 supports the hanging rope 9a, as shown in FIG. 5, the position of the bent side guide portion 10c, which is the turning point, is located outside the pivot shaft 13 in the folding direction.

[0057] Therefore, when the second horizontal arm portion 8b is aligned with the first horizontal arm portion 8a in a straight line (or at the desired maximum open angle) as shown in Figure 3, the length from the base side rotating roller 10d, via the bent side guide portion 10c, to the tip side guide portion 10b is longer by an extra length α as shown in Figure 5 compared to the length when folded as shown in Figure 4.Therefore, when the horizontal arm 8 is folded, the rope 9a guided by the guide portion 10 is shorter by the extra length α.

[0058] For this reason, as shown in Figure 3, even if a load is lifted when the second horizontal arm portion 8b is in a straight line and an operator attempts to bend the second horizontal arm portion 8b to the state shown in Figure 4, because the electric balancer 9 always pulls the rope with a constant force, a force greater than that of the electric balancer 9 is required to pull out the rope by the excess length α, and the second horizontal arm portion 8b cannot be bent by human power.

[0059] Furthermore, as shown in FIG. 4, when the second horizontal arm portion 8b is bent and a load is to be suspended, the rope length is extended by the amount of bending of the second horizontal arm portion 8b. However, when the electric balancer 9 tries to pull the load by the amount of extension, there is no reaction force to hold it in place, so when the load is suspended, the second horizontal arm portion 8b may open on its own, causing unintended behavior of the second horizontal arm portion 8b.

[0060] Therefore, in the present invention, a rope length adjustment section 11 is provided for the first horizontal arm section 8a to adjust (supplement) the excess length of the rope 9a that occurs when the second horizontal arm section 8b tilts.

[0061] That is, the rope length adjustment unit 11 adjusts the distance from the base of the first horizontal arm unit 8a, where the suspension lobe 9a is guided by the rope guide unit 10, via the bent portion side guide unit 10d, to the tip of the second horizontal arm unit when the first horizontal arm unit 8a and the second horizontal arm unit 8b are in a straight line (or at the desired maximum open angle), so that as the second horizontal arm unit 8b tilts in the closing direction relative to the first horizontal arm unit 8a, the distance from the base of the first horizontal arm unit 8a, through which the suspension lobe 9a passes, via the bent portion side guide unit 10c, to the tip of the second horizontal arm unit 8b is the same.

[0062] The above-mentioned distances are, for example, the lengths from the base-side guide portion 10d to the tip-side guide portion 10b via the bent-side guide portion 10c.

[0063] That is, the rope length adjustment section 11, for example, as shown in Figures 6 to 8, comprises a rectangular plate-shaped sheave piece 14 whose base is fixed to the base of the second horizontal arm section 8b and which tilts together with the second horizontal arm 8b in order to detour the rope 9a between the base side guide section 10d and the bent section side guide section 10c, and a sheave side guide section 15 provided at the tip of the sheave piece 14.

[0064] The sheave piece 14 is arranged, for example, to extend in a direction that tilts the second horizontal arm portion 8b relative to the second line a2 connecting the pivot shaft 13 and the tip end of the second horizontal arm portion 8b.

[0065] That is, for example, it is preferable that the sheave piece 14 is arranged to extend in a direction perpendicular to the direction of the line a2 extending along the second horizontal arm portion 8b, or in a direction that intersects with the line a2 at an angle inclined toward the rotation direction of the second horizontal arm portion from the perpendicular direction.

[0066] Furthermore, the sheave side guide portion 15, which moves in an arc as the sheave piece 14 tilts, gradually approaches a third line a3 (see, for example, Figure 3) connecting the base side guide portion 10d and the bent portion side guide portion 10c as the second horizontal arm portion 8b tilts from the time when the first horizontal arm portion 8a and the second horizontal arm portion 8b are in a straight line (or in a state where they are opened to the maximum desired angle) to the time when the first horizontal arm portion 8a and the second horizontal arm portion 8b are folded to the maximum, and is arranged so as to be just before, on, or beyond the line, as necessary.

[0067] The sheave side guide portion 15 is formed by, for example, a sheave side rotating roller. Instead of using a sheave side rotating roller, a non-rotating shaft may be used as the sheave side guide portion 15. The shaft is also provided in the vertical direction.

[0068] The rope 9a extending from the base side guide portion 10d is arranged to extend to the bending side guide portion 10c, passing through the outside (the folding direction side) of the sheave side guide portion 15 of the sheave piece 14, when the horizontal arm 8 is straight (or in the state of being opened to the maximum desired angle), and the bending side guide portion 10c is then formed to extend to the tip side guide portion 10b, passing through the outside (the side opposite to the folding direction).

[0069] The rope 9a guided between the base side guide portion 10d and the bending side guide portion 10c is passed through the sheave side guide portion 15, and this sheave side guide portion 15 is moved toward and away from the first line a1 in accordance with the tilting of the second horizontal arm portion 8b, thereby adjusting the length of the rope 9a between the base side guide portion 10d and the bending side guide portion 10c.

[0070] The sheave pieces 14 are arranged so as to be substantially perpendicular (intersect) with the line a2.

[0071] In addition, when the rope length adjustment unit 11 is not present, the positions of the sheave piece 14 and the sheave side guide portion 15 are set so that the maximum reserve length α from when the second horizontal arm portion 8b is in a straight line with respect to the first horizontal arm portion 8a (or in a state of being opened to the maximum desired angle) to when it is tilted to the maximum is the same as the difference in distance when the sheave piece 14 passes through the sheave side guide portion 15 and when it does not pass through when the second horizontal arm portion 8b is in a straight line with respect to the first horizontal arm portion 8a.

[0072] For example, Figure 6 shows the case where the first horizontal arm portion 8a and the second horizontal arm portion 8b are arranged in a straight line (rotation angle 0).In this case, because the rope length adjustment portion 11 is provided, the rope 9a extends by the maximum pre-length α between the base side sheave portion, the sheave portion and the bending side guide portion, compared to when it is not provided.

[0073] In this state, when the rope is rotated by an angle θ as shown in Figure 7, the winding length from the bending point of the second horizontal arm portion 8b gradually increases as shown in Figure 9, but the length of the rope diverted by the sheave side guide portion 15 gradually decreases due to the tilting of the sheave piece 14, and therefore the length of the rope 9a from the base side guide portion 10d to the tip side guide portion 10b remains almost constant.

[0074] FIG. 9 shows a diagram illustrating that the winding length increases according to the turning angle θ when a sheave is provided.

[0075] Then, as shown in Figure 8, the second horizontal arm portion 8b is bent to its maximum (for example, a rotation angle θ = 156 degrees), so that the rope from the base side guide portion 10d to the bent side guide portion 10c becomes approximately straight, and the length of the rope 9a from the base side guide portion 10d to the tip side guide portion 10b is kept approximately constant.

[0076] FIG. 10 is a diagram showing the change in rope length from the base side guide portion 10d to the tip side guide portion 10b when the rope length adjustment portion 11 is present and absent when the rotation angle is rotated from 0 degrees to 156 degrees.

[0077] As can be seen from FIG. 10 above, when there is no rope length adjustment unit 11, the fluctuation in rope length is large, but when there is a rope length adjustment unit 11, the fluctuation can be reduced.

[0078] Therefore, by providing the rope length adjusting section 11, the electric balancer device becomes easier to handle.

[0079] (Description of the stand)

[0080] The platform 6 may be provided with wheels (not shown) on the underside to make it movable. However, it is not necessary to provide wheels to make it movable.

[0081] The platform 6 may also be a vehicle or a moving object itself.

[0082] Furthermore, the platform 6 may be formed to a size that can be placed on the bed of a truck or the like, so that the electric balancing device of the present invention can be easily transported by truck. Also, the electric balancing device may be used while remaining on the truck.

[0083] In addition, in order to stably place the platform 6 on a support surface such as the ground, in the present invention, a foldable outrigger device 16 is provided on the platform, and when the electric balancer device is installed, the outrigger device 16 allows the platform 6 to be fixed on a support surface such as the ground or a loading platform.

[0084] It should be noted that the electric balancer device may be fixed by other means without using the outrigger device 16.

[0085] As shown in Figures 12 to 14, the outrigger device 16 of the present invention has a pair of outrigger elements 16a and 16b provided on one side of the platform 6 and the other side opposite to the one side.

[0086] Each of the outrigger elements 16a, 16b comprises a support portion 17 fixed on the base 6, a first support arm portion 18 having a base that is tiltable and attached to the support portion 17, a second support arm portion 19 having a base that is tiltable and attached to the upper portion of the first support arm portion 18, a mounting plate 20 attached to the tip of the second support arm portion 19, and fixing means (not shown) for fixing the first support arm portion 18 and the second support arm portion 19 at predetermined angles between a first position and a second position described below.

[0087] The outrigger elements 16a, 16b are fixed by the fixing means in a first position in which they are folded upright as shown in Figure 12, and in a second position in which, as shown in Figure 14, each support arm is bent 90 degrees from that position, the first support arm portion 18 tilts horizontally, the second support arm portion 19 is perpendicular to the first support arm portion 18, and the mounting plate 20 of the support arm portion 19 is placed on the ground, allowing the platform 6 to be supported on the ground.

[0088] Furthermore, by arranging the longitudinal direction of the first support arm portion 18 of one outrigger element 16a and the longitudinal direction of the first support arm portion 18 of the other outrigger element 16b to be in the same direction, the platform can be stably fixed to a support surface such as the ground.

[0089] It should be noted that a plurality of outrigger devices 16 may be provided.

[0090] By using the outrigger device of the present invention, the electric balancer device can be stably fixed to the ground or the like. [Explanation of symbols]

[0091] 1 unit 2 pillars 3 horizontal arm 4 Electric balancer 4a Rope 4b Hanging hook 5 Heavy objects 6 units 7 pillars 8 horizontal arm 8a First horizontal arm 8b Second horizontal arm section 9 Electric Balancer 9a Hanging rope 9b hook 10 Rope guide section 10a Hanging side guide 10b Tip side guide 10c Bending section side guide section 10d Base side guide 11 Rope length adjustment section 12 Arm 13 Pivot axis 14 Sheave piece 15 Sheave side guide 16 Outrigger device 16a One outrigger element 16b Other outrigger element 17 Support part 18 First support arm part 19 Second support arm part 20. Loading plate

Claims

1. A stand and A support pillar suspended on the platform; a horizontal arm provided on an upper portion of the support column and extending in a horizontal direction; The load is suspended by being wound up by an electric motor using a rope guided by the horizontal arm, and the electric balancer controls the electric motor to balance the weight of the suspended load and suspend it. The electric balancer device is characterized in that the electric balancer is fixed to the upper part of the support pillar.

2. 2. The electric balancer device according to claim 1, wherein the electric balancer is fixed to a tip of an arm portion provided on the upper part of the support pillar and extending in a direction opposite to the direction in which the horizontal arm extends.

3. A stand and A support pillar suspended on the platform; a horizontal arm provided on an upper portion of the support column and extending in a horizontal direction; The load is suspended by being wound up by an electric motor using a rope guided by the horizontal arm, and the electric balancer controls the electric motor to balance the weight of the suspended load, The electric balancer device is characterized in that the electric balancer is provided at the base of the horizontal arm.

4. 4. The electric balancer device according to claim 3, wherein the electric balancer is fixed to a tip of an arm portion provided at a base of the horizontal arm and extending in a direction opposite to the extension direction of the horizontal arm.

5. The horizontal arm is divided into a plurality of horizontal arm portions, a first horizontal arm portion on the base side of the horizontal arm of the adjacent horizontal arm portion; and a second horizontal arm portion on the tip side of the horizontal arm, the base of which is provided at the tip of the first horizontal arm portion so as to be tiltable via a pivot shaft, a guide portion that guides a hanging lobe of the electric balancer, the guide portion extending along the first horizontal arm portion and the second horizontal arm portion from a base portion of the first horizontal arm portion to a tip portion of the second horizontal arm portion; 4. The electric balancer device according to claim 1, further comprising a rope length adjustment unit that adjusts the length of the suspension rope guided by the guide unit in accordance with changes in the distance from the base of the first horizontal arm unit, via the guide unit, to the tip of the second horizontal arm unit when the second horizontal arm unit is tilted relative to the first horizontal arm unit from a predetermined angle at which it can be opened to a predetermined angle in a predetermined rotational direction.

6. The horizontal arm is divided into a plurality of horizontal arm portions, a first horizontal arm portion on the base side of the horizontal arm of the adjacent horizontal arm portion; and a second horizontal arm portion on the tip side of the horizontal arm, the base of which is provided at the tip of the first horizontal arm portion so as to be tiltable via a pivot shaft, a guide portion that guides a hanging lobe of the electric balancer, the guide portion extending along the first horizontal arm portion and the second horizontal arm portion from a base portion of the first horizontal arm portion to a tip portion of the second horizontal arm portion; a rope length adjustment unit is provided that adjusts the length of the suspension rope guided by the guide unit in accordance with a change in the distance from the base of the first horizontal arm unit via the guide unit to the tip of the second horizontal arm unit when the second horizontal arm unit is tilted relative to the first horizontal arm unit from a predetermined angle at which it can be opened to a predetermined angle in a predetermined rotational direction, the guide section comprises a base-side guide section provided at the base of the first horizontal arm section, a bending-side guide section provided at the tip of the first horizontal arm section or at the base of the second horizontal arm section, and a tip-side guide section provided at the tip of the second horizontal arm section, The bending-side guide portion is provided in a tip direction of the first horizontal guide portion at a predetermined distance from the pivot shaft, the pivot shaft is provided at a predetermined distance in a direction opposite to a tilting direction of the second horizontal arm portion from an axis connecting the base guide portion, the pivot shaft, and the tip guide portion when the second horizontal arm portion is in a state of being opened to a desired angle at the maximum relative to the first horizontal arm portion, the lobe length adjustment portion is provided at a base of the second horizontal arm portion in a direction in which the second horizontal arm portion tilts, and comprises a sheave piece of a predetermined length that intersects a line connecting the pivot shaft and the tip-side guide portion, and a sheave-side guide portion provided at the tip of the sheave piece, An electric balancer device as described in claim 1 or 3, characterized in that the rope is guided from the base side guide section to the bending side guide section via the sheave side guide section, and the length of the rope guided between the base side guide section and the bending side guide section 10c is adjusted by moving the sheave side guide section toward or away from the line connecting the base side guide section and the pivot axis in accordance with the tilting of the second horizontal arm section 8b.

7. 2. The electric balancer apparatus according to claim 1, wherein the platform has a foldable outrigger device for fixing the platform to a mounting surface of the platform.

8. The outrigger device comprises a pair of one outrigger element and the other outrigger element, Each of the outrigger elements comprises a support portion fixed on the platform, a first support arm portion having a base portion tiltably mounted on the support portion, and a second support arm portion having a base portion tiltably mounted on a tip end of the first support arm portion, a fixing means for fixing the first support arm portion and the second support arm portion at a first position where the first support arm portion and the second support arm portion are folded in an upright state; 8. The electric balancer device according to claim 7, further comprising fixing means for fixing the first support arm portion and the second support arm portion at a second position where the first support arm portion tilts horizontally and the second support arm portion is perpendicular to the first support arm portion and a lower end of the second support arm portion is placed on the ground.

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