Outrigger device for use with high-altitude work device

Abstract

To provide an outrigger device for use with a high-altitude work device.SOLUTION: In a structure configured such that an auxiliary leg (9) is pivotally supported on a housing (8) that extends in the vertical direction while attached to the side of a support column of a high-altitude work device and an arm (12) is provided to connect the auxiliary leg and the housing, a pivot (13) of the auxiliary leg (9) is held so as to be freely movable up and down by guide holding means (14) provided on the housing and a locking member (18) that moves in conjunction with the pivot (13) is connected to the pivot (13), providing a locking pin (19) that is inserted from the outside of the housing (8) to the inside so as to be freely movable back and forth makes it possible for the locking pin (19) to lock the closed leg locking portion (21) and the open leg locking portion (20) of the locking member (18) that moves in conjunction with the pivot, when the auxiliary leg (9) is set to the closed leg position (P1) or the open leg position (P2).SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an outrigger device for aerial work equipment such as a stepladder, a ladder, a work platform, etc. [Background technology]

[0002] Conventionally, stepladders, ladders, work platforms, and other high-altitude work equipment (hereinafter collectively referred to as "high-altitude work equipment") have been constructed so that they can be stably placed on the ground. However, if they fall over due to uneven ground, a shift in the worker's center of gravity, or other reasons, there is a risk of personal injury. Therefore, it has been proposed to attach outrigger devices to the supports of high-altitude work equipment. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5852473 [Patent Document 2] Patent No. 5916519 [Patent Document 3] Patent No. 5975677 Summary of the Invention [Problem to be solved by the invention]

[0004] Such outrigger devices are equipped with auxiliary legs that can be opened by spreading them out to the sides of the support posts of the aerial work device. That is, the auxiliary legs can be folded along the support posts when not in use, and can be opened when needed.

[0005] The outrigger device is preferably made into a unit, and in that case, it is preferable that it be configured with a housing extending in the vertical direction, auxiliary legs pivotally attached to the housing, and arms rotatably connected to the housing at intermediate longitudinal portions of the auxiliary legs. This is desirable as an outrigger because, when the lower ends of the auxiliary legs are in a spread-leg position with their lower ends spread out laterally from the housing, the auxiliary legs are supported from below by the housing via the arms.

[0006] In this case, the auxiliary legs in the open position are supported by a three-point pivot support, with the tip ends of the arms pivoted to the middle parts of the auxiliary legs and the base ends of the auxiliary legs and the arms pivoted to the upper and lower parts of the housing. For this reason, in order to fold the auxiliary legs and arms and store them in the housing when closing the auxiliary legs, it is necessary to configure the structure so that one of the pivot points can move.

[0007] However, providing a movable pivot point must be avoided because it reduces the support performance of the auxiliary legs when the legs are in a spread position, thereby reducing the safety of the outriggers.

[0008] Furthermore, it is necessary to provide a locking mechanism that prevents the auxiliary legs from opening or closing when they are in the open or closed position. In this regard, there are unresolved issues regarding how each component of the unitized outrigger device and the locking mechanism should be configured.

[0009] An object of the present invention is to provide an outrigger device that solves the above problems. [Means for solving the problem]

[0010] Therefore, what the present invention provides as means is an outrigger device that is provided on the side of a support column of a high-altitude work device, and comprises a housing that is attached to the support column and extends in the vertical direction, auxiliary legs that are provided on the housing, an opening / closing mechanism that allows the auxiliary legs to be opened and closed between a closed leg position along the housing and an open leg position in which the lower ends are spread out laterally from the housing, and a locking mechanism that allows the auxiliary legs to be locked in a closed leg position and an open leg position in which they cannot be opened or closed when in the closed leg position and the open leg position, respectively, and both ends of the opening / closing mechanism are rotatably connected to the longitudinal intermediate portion of the auxiliary legs and the housing. the locking mechanism is composed of a connected arm, a pivot that pivots the upper end of the auxiliary leg to the housing so that it can rotate freely, and a guide holding means that holds the pivot so that it can move freely along the housing, the locking mechanism is composed of a locking member connected to the pivot so that it moves together with the pivot, and a locking pin that is inserted at a predetermined position of the housing so that it can move back and forth from the outside to the inside, and the locking member is provided with an open-leg locking portion that is fixed by the locking pin when the auxiliary leg is in the open-leg position, and a closed-leg locking portion that is fixed by the locking pin when the auxiliary leg is in the closed-leg position.

[0011] In an embodiment of the present invention, the housing is formed by a grooved member that stores the auxiliary leg and the arm when the auxiliary leg is in a closed leg position, and the guide holding means is constituted by a first guide groove and a second guide groove that are formed opposite each other along a first side wall and a second side wall that constitute both side walls of the grooved member, and both ends of the pivot shaft are slidably fitted into the first guide groove and the second guide groove.

[0012] In this case, the housing forms a rail portion with a guide passage located outside the first guide groove and communicating with the groove, the locking member is slidably inserted into the guide passage, and the extension end of the end of the pivot inserted into the first guide groove is connected to the locking member inside the guide passage.

[0013] The lock pin is inserted through a pin hole opened at a predetermined position in the rail portion and through the guide passage toward the first guide groove so as to be movable back and forth, the pivot has an axial hole and opens the axial hole at its tip by passing the extended end through and connecting to the leg-open lock portion of the locking member, and the locking member has a closed-leg lock hole constituting the closed-leg lock portion in its extended portion extending inside the guide passage. Thus, when the auxiliary leg is in the open-leg position, the pivot faces the pin hole and the leg-open lock state is achieved by inserting the insertion portion of the lock pin into the axial hole, and when the auxiliary leg is in the closed-leg position, the closed-leg lock hole faces the pin hole and the leg-close lock state is achieved by inserting the insertion portion of the lock pin into the closed-leg lock hole.

[0014] Preferably, the lock pin includes a base shaft portion that penetrates the first side wall and the second side wall of the housing, an operating portion that is bent from the base shaft portion on the outside of the first side wall, and an insertion portion that is bent from the operating portion and extends toward the inside of the first side wall, and the insertion portion is urged by a spring provided on the base shaft portion so as to advance toward the inside of the first side wall. As a result, when the auxiliary legs are placed in the closed position and the open position, the insertion portion of the lock pin advanced by the spring fixes the closed leg lock portion and the open leg lock portion, respectively, thereby locking them. Then, the insertion portion of the lock pin retracted against the spring is disengaged from the closed leg lock portion and the open leg lock portion, thereby releasing the lock. [Effects of the Invention]

[0015] According to the present invention, an opening / closing mechanism 10 is configured by providing an arm 12 that connects the longitudinal middle portion of the auxiliary leg 9 to the housing 8, and in a configuration that stably supports the auxiliary leg 9 in the open leg position P2, the pivot 13 of the auxiliary leg 9 is held movably by the guide holding means 14 of the housing 8, so that the opening and closing operation between the closed leg position P1 and the open leg position P2 can be performed smoothly.

[0016] The locking mechanism 11 is made up of a locking member 18 connected to the pivot 13 so as to move together with the pivot 13, and a locking pin 19 inserted into the housing 8 so as to be able to move back and forth from the outside to the inside, which has the advantages of allowing for great freedom in design, a simple mechanism and no risk of malfunction or breakdown. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a front view showing a state in which the telescopic struts are contracted in relation to a high-altitude work apparatus equipped with outrigger devices according to an embodiment of the present invention. [Figure 2] 1A is a perspective view showing the outrigger device in a state where the legs are closed when the telescopic struts are retracted, and FIG. 1B is a perspective view showing the outrigger device in a state where the legs are spread. [Figure 3] FIG. 3 is a front view showing the aerial work apparatus with the telescopic column extended. [Figure 4] 1A is a perspective view showing the outrigger device in a closed leg position when the telescopic strut is extended, and FIG. 1B is a perspective view showing the outrigger device in a spread leg position when the telescopic strut is extended. [Figure 5] FIG. 1 is a perspective view showing a support column of an aerial work apparatus and a unit of an outrigger device in a spread leg position in a separated state according to an embodiment of the present invention. [Figure 6] 1A and 1B show cross sections of a housing that constitutes an outrigger device, where (A) is a cross section showing the relationship between the housing and the support pillar of the aerial work device, (B) is a cross section showing the housing and the pivot and locking member of the auxiliary leg, (C) is a cross section showing the state in which the locking pin is advanced with respect to the housing and locking pin, and (D) is a cross section showing the state in which the locking pin is retracted. [Figure 7] 1A is a perspective view showing the opening / closing mechanism and the locking mechanism when the auxiliary legs are in the open leg position, FIG. 1B is a cross-sectional view showing the open leg locked state by the locking mechanism, and FIG. 1C is a cross-sectional view showing the state when the lock is released from the open leg locked state. [Figure 8]1A is a perspective view showing the opening / closing mechanism and the locking mechanism when the auxiliary leg is in the closed leg position, FIG. 1B is a cross-sectional view showing the closed leg locked state by the locking mechanism, and FIG. 1C is a cross-sectional view showing the state when the lock is released from the closed leg locked state. DETAILED DESCRIPTION OF THE INVENTION

[0018] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0019] 1 to 4 show a stepladder 1a as an example of aerial work equipment 1. Stepladder 1a has ladder-like legs 2. Although not shown, a pair of legs 2, 2 are arranged facing each other on a top plate 3 at the top, and can be opened and closed in a direction toward or away from each other. Each leg 2 is formed like a ladder, with rungs 5 ​​attached to a pair of support posts 4, 4 arranged side by side in a generally V-shape. Support post 4 constitutes a telescopic support post with a main leg 4a and a telescopic leg 4b that can be extended and retracted from the lower end of main leg 4a and can be fixed in the extended position. When retracted as shown in FIGS. 1 and 2, it enables work at relatively low heights, and when extended as shown in FIGS. 3 and 4, it enables work at relatively high heights. In the illustrated example, a telescopic support post is formed by slidably inserting a telescopic leg 4b with a smaller cross-sectional shape into a main leg 4a with a larger cross-sectional shape. However, this is not limited to this.

[0020] Therefore, the outrigger device 6 of the present invention is attached to the outer surface of at least one of the supports 4, 4. In the illustrated embodiment, an outrigger device 6, 6 is attached to each of the supports 4, 4. Although the drawings show a stepladder 1a as an example of the aerial work apparatus 1, it should be understood that the outrigger device 6 of the present invention can be attached to any of various aerial work apparatuses equipped with telescopic supports, such as ladders, work platforms, etc., in addition to stepladders.

[0021] Furthermore, the outrigger device 6 of the present invention exerts its original function and effect when attached to the telescopic support 4 of the high-altitude work equipment 1 and used, but it can also be attached and used as is to the non-telescopic support provided on the high-altitude work equipment 1 that does not have an adjustable working height, and in that sense it has versatility between high-altitude work equipment that has an adjustable working height and high-altitude work equipment that does not have an adjustable working height.

[0022] When the outrigger unit 6 is attached to the telescopic column 4 of the aerial work device 1 for use, a slide holding member 7 is fixed to the vicinity of the lower end of the main leg 4a, and the outrigger unit 6 is slidably held by the slide holding member 7. In this case, the lower end of the outrigger unit 6 is fixed to the lower end of the telescopic leg 4b, and when the telescopic leg 4b is retracted as shown in Figures 1 and 2, the outrigger unit 6 is positioned along the side of the main leg 4a, and when the telescopic leg 4b is extended as shown in Figures 3 and 4, the outrigger unit 6 extends downward from the slide holding member 7 and is positioned along the side of the telescopic leg 4b.

[0023] For this reason, the outrigger device 6 forms a unit with a housing 8 extending in the vertical direction, and a slide holding mechanism is formed between the housing 8 and the slide holding member 7, and the lower end of the housing 8 is fixed to the lower end of the telescopic leg 4b via a bolt (not shown).

[0024] (Overall configuration of outrigger device) As shown in Figures 5 and 6, the outrigger device 6 comprises the housing 8 and auxiliary legs 9 attached to the housing 8, and is provided with an opening / closing mechanism 10 that allows the auxiliary legs 9 to be freely opened and closed between a closed leg position P1 along the housing 8 and an open leg position P2 in which the lower ends are spread out laterally from the housing 8, and further includes a locking mechanism 11 that sets the auxiliary legs 9 in a closed leg locked state and an open leg locked state in which they cannot be opened or closed when they are in the closed leg position P1 or the open leg position P2, respectively.

[0025] (Opening and closing mechanism) The opening / closing mechanism 10 is composed of an arm 12 whose two ends are rotatably connected via pivots 12a, 12b to the longitudinal intermediate portion of the auxiliary leg 9 and the portion near the lower end of the housing 8, a pivot 13 that rotatably supports the upper end of the auxiliary leg 9 to the housing 8, and a guide / holding means 14 that holds the pivot 13 movably along the housing 8. An end fitting 9a is provided at the lower end of the auxiliary leg 9, which comes into contact with the ground when the auxiliary leg is in the leg-open position P2.

[0026] 6(A), the housing 8 is formed of a channel member 15 extruded from a metal such as aluminum, and is configured to store the auxiliary leg 9 and the arm 12 when the auxiliary leg 9 is in the closed leg position P1, and is slidably held by fitting slide pieces 15a, 15a protruding on both sides from the bottom wall of the channel member 15 into slide grooves 7a, 7a of the slide holding member 7. As mentioned above, the portion of the bottom wall of the channel member 15 near the lower end is fixed with a bolt or the like to the lower end of the telescopic leg 4b, for example, to a grounding end fitting attached to the lower end.

[0027] The pivot 13 passes through the auxiliary leg 9 laterally to rotatably support the auxiliary leg 9, and as shown in Figure 6(B), it is formed from a cylindrical member and has an axial hole 13a, and is movably held by a guide holding means 14 extended in the longitudinal direction of the housing 8.

[0028] In the illustrated embodiment, a first side wall 16a and a second side wall 16b are formed by both side walls of a groove-shaped member 15 that constitutes the housing 8, and a first guide groove 17a and a second guide groove 17b that open to the inside of each side wall and face each other are provided, and both ends of the pivot 13 are slidably fitted into these grooves to form the guide and holding means 14.

[0029] (locking mechanism) The locking mechanism 11 is composed of a locking member 18 connected to the pivot 13 so as to move together with the pivot 13, and a locking pin 19 inserted at a predetermined position in the housing 8 so as to be able to move back and forth from the outside to the inside.

[0030] The locking member 18 is provided with a leg-open locking portion 20 and a leg-closed locking portion 21 that are fixed by the locking pin 19 when the auxiliary leg 9 is in the leg-open position P2 or the leg-closed position P1. The locking member 19 is formed from a strip-shaped metal plate that extends parallel to the first guide groove 17a of the housing 8, and the leg-open locking portion 20 and the leg-closed locking portion 21 can each be configured as a hole or the like into which the locking pin 19 is inserted so as to be engageable and detachable.

[0031] In the illustrated embodiment, a rail portion 23 is integrally formed, which is located outside the first guide groove 17a of the housing 8 and has a guide passage 22 that communicates with the groove, and a locking member 18 made of a strip-shaped metal plate is slidably inserted into this guide passage 22.

[0032] Therefore, the pivot 13 of the auxiliary leg 9 fitted into the first guide groove 17a forms an extension end 13b that extends from the shaft end toward the inside of the guide passage 22, and the extension end 13b is passed through and connected to the leg opening lock portion 20 of the locking member 18, with the shaft hole 13a opening at the tip.

[0033] As a result, when the auxiliary leg 9 opens and closes between the open leg position P2 and the closed leg position P1, the pivot 13 moves up and down along the first guide groove 17a and the second guide groove 17b (guide and holding means 14). At this time, the locking member 18 moves up and down inside the guide passage 22 together with the pivot 13.

[0034] In contrast, the lock pin 19 has an insertion portion 19a that is inserted through a pin hole 24 opened at a predetermined position on the rail portion 23 and is capable of moving back and forth toward the guide passage 22 and the first guide groove 17a.

[0035] In the illustrated embodiment, the lock pin 19 has a base shaft portion 19b that penetrates the first side wall 16a and the second side wall 16b of the housing 8, and an operating portion 19c that is bent from the base shaft portion 19b to the outside of the first side wall 16a, and the insertion portion 19a is formed by the portion that is bent from the operating portion 19c toward the inside of the first side wall 16a.

[0036] At this time, a spring 25 is provided on the base shaft portion 19b, and this urges the lock pin 19 so that the insertion portion 19a advances toward the inside of the first side wall 16a.

[0037] (Leg-locked position) 7 shows a leg-locked state in which the auxiliary leg 9 in the leg-open position P2 is locked by the lock mechanism 11. At this time, the pivot 13 of the auxiliary leg 9, which has moved along the guide holding means 14 (guide grooves 17a, 17b), faces the pin hole 24, and the insertion portion 19a of the lock pin 19 is inserted into the shaft hole 13a. In the illustrated embodiment, in this state, the leg-open lock portion 20 of the locking member 18 is indirectly fixed by the lock pin 19 via the pivot 13. However, it is also possible to change the positional relationship between the pivot 13 and the lock pin 19 when the auxiliary leg 9 is in the leg-open position P2 and configure the insertion portion 19a of the lock pin 19 to be inserted into a hole provided in the locking member 18, so that the locking member 18 is directly fixed by the lock pin 19.

[0038] When releasing the leg-spread lock state, as shown in Figure 7(C), by pinching the operating part 19c with the fingertips, the lock pin 19 is moved against the spring 25, and the insertion part 19a retracts and comes out of the axial hole 13a of the pivot 13, allowing the lock member 18 to move up and down together with the pivot 13.

[0039] At this time, if the insertion portion 19a that has come out of the shaft hole 13a is configured to stop inside the pin hole 24 at a position where the compressed spring 25 prevents the lock pin 19 from moving backward, as shown in the figure, then when the auxiliary leg 9 is rotated toward the closed leg position P1 in this state, the side of the lock member 18 (the plate surface of the extension portion 18a extending downward from the leg-open lock portion 20) will face the tip of the insertion portion 19a. Therefore, while the lock pin 19 is biased in the forward direction by the spring 25, the tip of the insertion portion 19a can be moved while rubbing against the plate surface of the lock member 18, thereby allowing the auxiliary leg 9 to rotate.

[0040] Therefore, when rotating the auxiliary leg 9 between the open leg position P2 and the closed leg position P1, the operator simply moves the insertion section 19a backward via the operation section 19c to release the lock, rotates the auxiliary leg 9, and then releases the operation section 19c to perform the work. When the auxiliary leg 9 is set to the open leg position P2 or the closed leg position P1, the open leg lock section 20 or the closed leg lock section 21 of the locking member 18 faces the tip of the insertion section 19a, so that the insertion section 19a moves forward due to the biasing force of the spring 25, and is automatically locked.

[0041] (Leg closed lock state) 8 shows a closed-leg locked state in which the auxiliary leg 9, which is in the closed-leg position P1, is locked by the lock mechanism 11. As shown in the figure, when the auxiliary leg 9 is rotated from the open-leg position P2 to the closed-leg position P1, the auxiliary leg 9 stands up while moving the pivot 13 upward, and the arm 12 is folded so that it overlaps the auxiliary leg 9. At this time, the lock member 18, which is pulled by the pivot 13 and moved along the guide path 22, has a closed-leg lock portion 21 formed by a closed-leg lock hole 21a provided in an extension portion 18a extending downward from the open-leg lock portion 20, facing the pin hole 24, and the insertion portion 19a of the lock pin 19 is inserted into the closed-leg lock portion 21.

[0042] In the illustrated embodiment, a locking hole 26 facing the pin hole 24 is also provided on the side of the auxiliary leg 9, and the insertion portion 19a is configured to be inserted into the locking hole 26, but this is not a required configuration.

[0043] As in the case described above, when releasing the closed leg lock state, as shown in Figure 8 (C), by pinching the operating portion 19c with the fingertips, the lock pin 19 is moved against the spring 25, and the insertion portion 19a retracts and disengages from the engagement hole 26 and the closed leg lock portion 21, allowing the lock member 18 to move up and down and the auxiliary leg 9 to rotate.

[0044] (action) As described above, the outrigger device 6 has an advantage in that the opening and closing mechanism 10 is configured by providing the arm 12 that connects the housing 8 to the longitudinal middle portion of the auxiliary leg 9, which is rotatably supported on the housing 8, so that the auxiliary leg 9 in the open leg position P2 is stably supported. In this case, when the auxiliary leg 9 is opened or closed between the closed leg position P1 and the open leg position P2, the pivot 13 is configured to move while being held by the guide holding means 14 of the housing 8, so that the opening and closing operation can be performed smoothly.

[0045] The locking mechanism 11 is configured by a locking member 18 connected to the pivot 13 so as to move together with the pivot 13, and a locking pin 19 inserted through the housing 8 so as to be movable back and forth from the outside to the inside, and the locking pin 19 fixes the closed-leg locking section 21 and the open-leg locking section 20 provided on the locking member 18 when the auxiliary leg 9 is in the closed-leg position P1 or the open-leg position P2, which has the advantage of allowing for a high degree of freedom in design. That is, the locking member 18, which moves together with the pivot 13, can be formed into a long shape using a strip-shaped metal plate or the like, so that it is sufficient to select positions corresponding to the closed-leg lock state and the open-leg lock state and then provide the closed-leg locking section 21 and the open-leg locking section 20 formed from holes or the like at those positions, and no other complex configuration is required, resulting in a simple mechanism and no risk of malfunction or failure. [Explanation of symbols]

[0046] 1. Aerial work equipment 1a Stepladder bipedal body 3. Top plate 4 (Telescopic) struts 4a Main landing gear 4b telescopic legs 5. Stepping Rail 6 Outrigger device 7 Slide holding member 7a Slide groove 8. Housing 9 Auxiliary legs 9a End fitting P1 Legs closed P2 Open leg posture 10 Opening and closing mechanism 11 Locking mechanism 12 Arm 12a, 12b Axis 13 Axis 13a Shaft hole 13b Extension end 14 Guidance and retention means 15 Channel members 15a Slide piece 16a 1st side wall 16b 2nd side wall 17a First guide groove 17b Second guide groove 18 Locking member 18a Extension 19 Lock pin 19a Insertion part 19b Base part 19c Operation section 20 Leg Lock 21 Closing leg lock 21a Closure lock hole 22 Guide passage 23 Rail section 24 pin holes 25 Spring 26 Locking hole

Claims

1. The outrigger device is provided on the side of a support pillar of a work platform, and comprises a housing (8) attached to the support pillar and extending in the vertical direction, auxiliary legs (9) provided on the housing, an opening / closing mechanism (10) that allows the auxiliary legs (9) to be opened and closed between a closed leg position (P1) along the housing and an open leg position (P2) in which the lower ends of the auxiliary legs (9) are spread out laterally from the housing, and a locking mechanism (11) that sets the auxiliary legs (9) in a closed leg lock state and an open leg lock state in which they cannot be opened or closed when the auxiliary legs (9) are in the closed leg position (P1) and the open leg position (P2), respectively. The opening / closing mechanism (10) is composed of an arm (12) whose both ends are rotatably connected to the longitudinal intermediate portion of the auxiliary leg (9) and the housing (8), a pivot (13) that pivotally supports the upper end of the auxiliary leg (9) to the housing (8), and a guide / holding means (14) that holds the pivot (13) movably along the housing, The lock mechanism (11) is composed of a lock member (18) connected to the pivot (13) so as to move together with the pivot (13), and a lock pin (19) inserted at a predetermined position of the housing (8) so as to be movable back and forth from the outside to the inside, The locking member (18) is provided with a leg-open locking portion (20) that is fixed by the locking pin (19) when the auxiliary leg is in the leg-open position (P2), and a leg-closed locking portion (21) that is fixed by the locking pin (19) when the auxiliary leg is in the leg-closed position (P1).

2. 2. The outrigger device for aerial work equipment according to claim 1, wherein the housing (8) is formed by a groove-shaped member (15) that stores the auxiliary leg (9) and the arm (12) when the auxiliary leg is in the closed leg position (P1), and the guide holding means (14) is formed by a first guide groove (17a) and a second guide groove (17b) that are opposed to each other and formed along a first side wall (16a) and a second side wall (16b) that constitute both side walls of the groove-shaped member, and both ends of the pivot shaft (13) are slidably fitted into the first guide groove (17a) and the second guide groove (17b).

3. 3. An outrigger device for aerial work equipment as described in claim 2, characterized in that the housing (8) forms a rail portion (23) with a guide passage (22) located outside the first guide groove (17a) and communicating with the groove, the locking member (18) is slidably inserted into the guide passage (22), and the extension end (13b) of the end of the pivot (13) fitted into the first guide groove (17a) is connected to the locking member (18) inside the guide passage (22).

4. The lock pin (19) is inserted through a pin hole (24) formed at a predetermined position of the rail portion (23) and through the guide passage (22) toward the first guide groove (17a) so as to be movable back and forth. The pivot (13) has a shaft hole (13a), and the extension end (13b) is passed through and connected to the leg-opening lock portion (20) of the locking member (18), thereby opening the shaft hole (13a) at the tip, The locking member (18) has an extension (18a) extending inside the guide passage (22) and provided with a closing leg lock hole (21a) constituting the closing leg lock portion (21), When the auxiliary leg (9) is in the leg-open position (P2), the pivot (13) faces the pin hole (24), and the insertion portion (19a) of the lock pin (19) is inserted into the shaft hole (13a), thereby establishing a leg-open locked state; 4. An outrigger device for a high-altitude work device according to claim 3, characterized in that, when the auxiliary leg (9) is in the closed leg position (P1), the closed leg lock hole (21a) faces the pin hole (24), and the insertion portion (19a) of the lock pin (19) is inserted into the closed leg lock hole (21a) to establish a closed leg locked state.

5. The lock pin (19) includes a base shaft portion (19b) that penetrates the first side wall (16a) and the second side wall (16b) of the housing (8), an operating portion (19c) that is bent from the base shaft portion outside the first side wall (16a), and an insertion portion (19a) that is bent from the operating portion and extends toward the inside of the first side wall (16a), and a spring (25) provided on the base shaft portion (19b) biases the insertion portion (19a) so as to move forward toward the inside of the first side wall (16a).

5. An outrigger device for aerial work equipment according to claim 2, 3 or 4, characterized in that, when the auxiliary leg (9) is in the closed leg position (P1) or the open leg position (P2), the closed leg lock section (21) and the open leg lock section (20) are fixed by the insertion section (19a) of the lock pin (19) advanced by the spring (25), respectively, to lock the same, and the lock is released by disengaging the insertion section (19a) of the lock pin (19) from the closed leg lock section (21) and the open leg lock section (20), which are retracted against the spring (25).

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