JP2013177783A - Outrigger device for high lift work device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outrigger device to be used for a high lift work device equipped with telescopic columns.SOLUTION: The outrigger device to be mounted on each column (4) of the high lift work device, having a main leg (4a) and a telescopic leg (4b), includes a supporting member (7) to be attached to the column (4), and an auxiliary leg (10) provided on the supporting member via an opening/closing mechanism (9). The auxiliary leg (10) can be freely opened/closed between a leg closing position and a leg opening position by the opening/closing mechanism (9). Between the main leg (4a) of the column (4) and the supporting member (7), a slide guide mechanism (11) is provided in which the supporting member (7) is movably connected to the main leg (4a) in its longitudinal direction and connection means (12) is provided via which the telescopic leg (4b) of the column (4) and the supporting member (7) are connected to each other. When the telescopic leg (4b) is telescopically moved, the supporting member (7) is moved following and accompanying it.

Description

The present invention relates to an outrigger device in an aerial work device such as a stepladder, a ladder, or a work table.

Conventionally, stepladders, ladders, work tables, and other high-altitude work devices (hereinafter simply referred to as “high-high work devices”) are configured so as to be stably installed on the ground. If there is a risk of personal injury if it falls due to the movement of the center of gravity or other causes, it has been proposed that an outrigger device is attached to the support column of an aerial work device.

JP 2004-131971 A Japanese Patent No. 4035486

Such an outrigger device includes an auxiliary leg that can be expanded to the side of a support column of an aerial work device. Therefore, the auxiliary leg can be closed along the support column when not in use, but is used by opening the leg if necessary.

Depending on the site of the high-altitude work, the high-altitude work device has a relatively low-altitude work (hereinafter referred to as “low-high-altitude work”) and a relatively high-altitude work (hereinafter “high-altitude work”). It is convenient that the device can be selected by a single device. For this reason, a support column (hereinafter referred to as “extensible / contractible”) having a main leg and an extendable leg that can be extended and contracted from the lower end of the main leg. There is provided a high-altitude working device provided with a support column.

However, if the outrigger device is attached to the main leg of the telescopic strut in such an altitude working device that can be raised and lowered freely, the auxiliary leg that is opened from the outrigger device is suspended when the telescopic strut is extended at high altitude work. Do not ground. Therefore, like the telescopic strut, the auxiliary leg of the outrigger device needs to have a telescopic structure, which causes a problem of incurring high costs.

In addition, even if the auxiliary legs of the outrigger device have a telescopic structure, it is necessary to extend and retract the auxiliary legs of the outrigger device separately from the operation of expanding and contracting the telescopic support column of the aerial work device at the work site. There is a problem that the installation work of the work equipment is complicated and wastes time and labor.

It is an object of the present invention to provide an outrigger device that can be easily mounted on an altitude working device that can be freely mounted at a high and low level with a telescopic support column. When the strut is extended, the outrigger device follows and moves to the extended position, and when the auxiliary leg is opened in this state, it is possible to contact the ground, and when the telescopic strut is contracted, the outrigger device follows and contracts. It is an object of the present invention to provide a device that can be suitably grounded to the ground when moved to a position and the auxiliary leg is opened in that state.

Another object of the present invention is to have a simple structure for opening and closing the auxiliary leg in the outrigger device, and to lock the auxiliary leg so that it cannot be opened and closed in the open and closed leg states by an easy operation. This is to ensure safety during work.

Therefore, the present invention is configured as a means for solving the above-mentioned problems, in an aerial work apparatus having a main leg and a post provided with a telescopic leg that is extendable from the lower end of the main leg. The outrigger device is provided on a side surface, and the outrigger device includes a support member attached to the support column and an auxiliary leg provided on the support member via an opening / closing mechanism. The auxiliary leg and the support member are mutually connected so that the leg can be opened and closed between a closed leg position along the support member and an open leg position in which the lower end portion of the auxiliary leg is widened to the side of the column. And a slide guide mechanism is provided between the main leg of the support column and the support member so as to be movable in the longitudinal direction of the main leg, and the telescopic leg of the support column and the support member are connected to each other. Connecting means to connect to Lies in comprising configured to move the support member accompany to the expansion and contraction movement of the telescopic leg.

The slide guide mechanism may be provided between a fixing member fixed to the main leg of the support column and the support member, or may be provided between the main leg of the support column and the support member.

In a preferred embodiment of the present invention, the auxiliary leg forms a groove that opens toward the support member, and the opening / closing mechanism is positioned at an upper portion of the outrigger device and rotatably connects the support member and the auxiliary leg. A first arm and a second arm that is positioned below the first arm and pivotally connects the support member and the auxiliary leg are configured such that when the auxiliary leg is closed, both arms are stored in the groove. The first arm is formed shorter than the second arm. One end of the first arm is pivotally connected to the support member by the first pivot and the other end is the auxiliary leg by the second pivot. The second arm has one end pivotally connected to the support member by the first pivot and the other end pivoted to the auxiliary leg by the second pivot. The first arm closes the auxiliary leg. Upwards from the first pivot to the second pivot It is a-energized, when the open leg auxiliary leg is configured to be a flat position from the first pivot by reversing toward the second pivot.

In another preferred embodiment of the present invention, the opening / closing mechanism has at least one end portion pivotally connected to the column side member by the first pivot and the other end portion pivotally connected to the auxiliary leg by the second pivot. The arm is configured such that the longitudinal direction of the arm and the auxiliary leg is positioned in the same axial direction in a state where the auxiliary leg is closed or opened, and the arm supports the second pivot. A pivot movement means extends in the longitudinal direction of the extension, and the pivot movement means has a lock position on the proximal end side and an unlock position on the distal end side of the arm extension section, and the second pivot axis is integrated with the auxiliary leg. And is configured to move between the locked position and the unlocked position, and the locking means is configured by the engaging portion provided in the arm extension portion and the engaged portion provided in the auxiliary leg. The locking means is in an open leg state or When the second pivot is moved to the locked position together with the auxiliary leg in the closed leg state, the rotation is prevented by engaging the engaging part and the engaged part with each other, and the open leg state or the closed leg state When the second pivot is moved to the unlock position together with the auxiliary leg, the engagement portion and the engaged portion are disengaged with respect to the rotation direction of the auxiliary leg around the second pivot. Thus, the rotation is made possible.

The opening / closing mechanism according to the first specific example is configured by at least one arm having one end pivotally connected to the column side member by the first pivot and the other end pivoted to the auxiliary leg by the second pivot. With the auxiliary leg closed or open, the longitudinal direction of the arm and the auxiliary leg is located in the same axial direction, the arm is stored along the groove of the auxiliary leg, and the side of the arm is placed on the side of the groove. The arm is configured to overlap with the groove bottom wall portion, and the arm extends in a longitudinal direction of an arm extension portion that pivotally supports the second pivot shaft, and the pivot movement means is a base of the arm extension portion. The second pivot is configured to move integrally between an auxiliary leg and between the locked position and the unlocked position, and has an arm extension. Engaging part provided on the side of the unlocking position of the part The locking means is constituted by the engaged portion provided on the groove bottom wall portion of the auxiliary leg, and the locking means moves the second pivot together with the auxiliary leg in the locked position in a state where the auxiliary leg is closed or opened. When the movement is performed, the rotation is prevented by causing the engaging portion and the engaged portion to interfere with each other with respect to the rotation direction about the second pivot, and the open leg state or the closed leg state is established. When the second pivot is moved to the unlocked position together with the auxiliary leg, the rotation of the auxiliary leg about the second pivot is canceled by releasing the interference between the engaging part and the engaged part. Configured to allow movement.

The opening / closing mechanism according to the second specific example is configured by at least one arm having one end pivoted to the column side member by the first pivot and the other end pivoted to the auxiliary leg by the second pivot. In a state where the auxiliary leg is closed or opened, the longitudinal direction of the arm and the auxiliary leg is positioned in the same axial direction, and the arm is in the longitudinal direction of the arm extension that pivotally supports the second pivot The pivot movement means is provided with a lock position on the proximal end side of the arm extension portion and an unlock position on the distal end side, and a wide bearing portion provided at the unlock position, and the bearing portion Forming a narrow constriction from the locking position to the locking position, and the second pivot moves integrally with the auxiliary leg between the locking position and the unlocking position, and rotates together with the auxiliary leg. With respect to the cross-sectional shape of the second pivot An engagement part formed by a narrow part of the pivot movement means, comprising a long diameter part that can rotate inside the bearing part and cannot enter the narrow part, and a short diameter part that can enter the narrow part. And an engaged portion formed by the short diameter portion of the second pivot, and the locking means locks the second pivot together with the auxiliary leg in a state where the auxiliary leg is closed or opened. When moved to the position, with respect to the rotation direction around the second pivot, the narrowing portion and the short diameter portion are engaged with each other to prevent the rotation, and the leg is opened or closed. When the second pivot is moved to the unlocked position together with the auxiliary leg, the engagement between the narrowed portion and the short diameter portion is released with respect to the rotation direction of the auxiliary leg around the second pivot, and the second pivot is It is configured to enable the rotation by pivotally supporting the bearing part. That.

According to the opening / closing mechanism of the second specific example, the second pivot is moved to the unlocked position together with the auxiliary leg in the open or closed state, and the second pivot is rotated together with the auxiliary leg inside the bearing portion. When moved, the long diameter portion of the second pivot is made inaccessible into the constricted portion, thereby forming an unlock holding means.

The opening / closing mechanism is provided with a bullet urging means for urging the second pivot toward the locked position so that the second pivot can be moved to the unlock position against the bullet urging means. It is preferable to configure.

At this time, the arm extension portion projects a tongue piece having an arc edge at the tip, and the pivot movement means is constituted by a long hole extending toward the center of the arc edge. It is preferable to pass through the pivot.

According to the first to third aspects of the present invention, when an operator expands and contracts the support column 4 of the height work apparatus 1 in order to cope with low-level and high-level work at a work site, The outrigger device 6 can be automatically moved to a predetermined position simply by expanding and contracting the support column 4, and if the auxiliary leg 10 is opened in that state, the lower end of the auxiliary leg 10 can be suitably grounded. It is safe to work at high places.

According to the fourth aspect of the present invention, the first arm 8a is stored in the groove portion 18a of the auxiliary leg 10 as an upward posture when the auxiliary leg 10 is closed, and is inverted when the auxiliary leg 10 is opened. As a result, it is stored in the groove 18a of the auxiliary leg 10 as a downward posture, so that it has a simple appearance in which the first arm 8a and the auxiliary leg 10 are integrally coupled when the leg is closed or opened. Therefore, it is safe to use the aerial work device 1. When the auxiliary leg 10 is opened, the first arm 8a is reversed, and the posture is downwardly directed from the first pivot 22a pivoted to the support member 7 toward the second pivot 23a pivoted to the auxiliary leg 10. Since the auxiliary leg 10 is opened in the downward movement position together with the second pivot 23a, the function of the outrigger can be exhibited by designing the opening angle of the auxiliary leg 10 large, even when the leg opening angle is increased. It becomes possible to bring the lower end of the auxiliary leg 10 closer to the ground plane.

According to the fifth aspect of the present invention, with respect to at least one arm 8a (8b) constituting the opening / closing mechanism 9, the second pivot 23a together with the auxiliary leg 10 is provided by the pivot moving means 27 formed in the arm extension 24. (23b) is configured to be movable between the locking position M1 and the unlocking position M2, and the engaging portion 25A of the arm extension 24 and the auxiliary leg 10 (the second pivot integrated with the auxiliary leg 10). 23a (including 23b)), the locking means 25 is configured, so that the second pivot 23a (23b) is moved to the locking position M1 together with the closed or opened leg of the auxiliary leg 10. By preventing the auxiliary leg 10 and the first arm 8a from rotating relative to each other and locking the closed leg state or the open leg state with one touch, the aerial work device 1 can be used safely. Then, the auxiliary leg 10 can be closed or opened only by moving the second pivot 23a (23b) to the unlock position M2 together with the auxiliary leg 10 from the locked state. It can be done quickly and easily.

According to the sixth aspect of the present invention, a first specific example of the opening / closing mechanism 9 is configured, and the auxiliary leg 10 is formed with a groove portion 18 a that opens toward the support member 7, and the auxiliary leg 10 is closed. Since the arms 8a and 8b constituting the opening / closing mechanism 9 are configured to be stored along the groove 18a, a compact legged state is possible. The locking means 25 includes an engaging portion 25A formed by the side portion of the arm extension 24 at the unlock position M2 and an engaged portion 25B formed on the groove bottom wall portion 18c of the auxiliary leg 10. Therefore, no special processing or parts are required, and the configuration is extremely simple and can be easily implemented.

According to the seventh and eighth aspects of the present invention, the second specific example of the opening / closing mechanism 9 is configured, and the bearing portion 32 is provided at the unlock position M2 of the pivot movement means 27 and the constriction portion is provided at the lock position M1. 33, and the second pivot 23a is provided with the long diameter portions 30 and 30 and the short diameter portions 31 and 31, and the engagement portion 25A formed in the narrowed portion 33 and the short diameter portions 31 and 31 are formed. Since the locking means 25 is constituted by the engaged portion 25B, it is possible to form the unlock holding means 35 according to claim 4. For this reason, the second pivot 23a is held at the unlock position M2 without moving to the lock position M1 while the auxiliary leg 10 is being rotated in the opening leg direction or the closing leg direction. Easy to open and close.

According to the ninth aspect of the present invention, since the bullet urging means 28 for urging the second pivot 23a toward the lock position M1 is provided, the auxiliary leg is opposed to the bullet urging means 28. 10 and the second pivot 23a can be moved to the unlocked position M2 and the leg can be opened or closed. If the auxiliary leg 10 is released at the opened or closed position, the second pivot 23a is automatically locked. There is an effect that the lock means 25 can be automatically locked by returning to M1 and being held.

It is a front view which shows the state which extended the expansion-contraction support | pillar regarding the aerial work apparatus equipped with the outrigger apparatus which concerns on one Embodiment of this invention. It is a front view which shows the state which contracted the expansion-contraction support | pillar regarding the aerial work apparatus equipped with the outrigger apparatus which concerns on one Embodiment of this invention. It is a perspective view shown in the state which decomposed | disassembled the outrigger apparatus which concerns on one Embodiment of this invention. FIG. 5 is a perspective view showing an outrigger device according to an embodiment of the present invention, with a support member attached to a fixing member fixed to a telescopic column via slide guide means, and an auxiliary leg and arm disassembled. It is a perspective view shown in the state where the outrigger device concerning one embodiment of the present invention was installed in the telescopic support column of an aerial work device, and the auxiliary leg was closed. It is a vertical side view shown in the state where the auxiliary leg was closed about the 1st example of the opening-and-closing mechanism in the outrigger device concerning one embodiment of the present invention. It is a vertical side view shown in the state which opened the auxiliary leg regarding the 1st specific example of an opening-and-closing mechanism. It is a cross-sectional view which shows the closed leg state of the outrigger apparatus which concerns on one Embodiment of this invention, (A) is the sectional view on the AA line of FIG. 6, (B) is the sectional view on the BB line of FIG. C) is a cross-sectional view taken along line CC of FIG. It is a cross-sectional view which shows the closed leg state of the outrigger apparatus which concerns on one Embodiment of this invention, (D) is the DD sectional view taken on the line of FIG. 6, (E) is the EE sectional view taken on the line of FIG. . It is a longitudinal cross-sectional view which shows the relationship between the 1st arm in a closed leg state, an auxiliary leg, and a supporting member regarding the 1st specific example of an opening / closing mechanism. It is a longitudinal cross-sectional view which shows the relationship between the 2nd arm in a closed leg state, an auxiliary leg, and a supporting member regarding the 1st specific example of an opening-and-closing mechanism. It is a longitudinal cross-sectional view which shows the effect | action of the 1st arm at the time of opening an auxiliary leg from a closed leg state regarding the 1st specific example of an opening / closing mechanism. It is a longitudinal cross-sectional view which shows the effect | action of the 1st arm at the time of extending an auxiliary leg to an open leg state regarding the 1st specific example of an opening / closing mechanism. It is the perspective view which shows the 2nd specific example of an opening-and-closing mechanism, and shows an auxiliary leg, a 1st arm, a 2nd axis, and a bullet urging means in an exploded state. The locking means between an auxiliary leg and the 1st arm is shown about the 2nd example of an opening-and-closing mechanism, (A) is a sectional view showing the state where the 2nd axis was moved to the locked position, (B) is the 2nd It is sectional drawing which shows the state which moved the pivot to the unlocking position. The action of the second specific example of the opening and closing mechanism is shown, (A) is a longitudinal sectional view showing the relationship between the first arm, the auxiliary leg and the support member in the closed leg state, and (B) is the pivot movement means for the second pivot together with the auxiliary leg. It is a longitudinal cross-sectional view which shows the state which moved to the unlocking position. It is a longitudinal cross-sectional view which shows the effect | action of the 2nd example of an opening-and-closing mechanism, and shows the effect | action of an unlock holding means at the time of extending an auxiliary leg from a closed leg state. It is a longitudinal cross-sectional view which shows the effect | action of the 2nd example of an opening / closing mechanism, and shows the state which opened the auxiliary leg. 3 shows another embodiment of the slide guide mechanism of the present invention, wherein (A) is a cross-sectional view showing the second embodiment, (B) is a cross-sectional view showing the third embodiment, and (C) is the fourth. It is a cross-sectional view showing an embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIGS. 1 and 2 show a stepladder 1a as an example of an aerial work apparatus 1, and the stepladder 1a includes a ladder-like leg 2 and is omitted from the top plate 3 although not shown. Thus, the pair of legs 2 and 2 are configured to be openable and closable in the approaching / separating direction in a face-to-face state. It is formed in a ladder shape. The support column 4 constitutes an extendable support column that includes a main leg 4a and an extendable leg 4b that is extendable from the lower end of the main leg 4a and can be fixed at the extension position, and is contracted as shown in FIG. Thus, the low-altitude work can be performed, and the high-high work can be performed in the extended state as shown in FIG. In the case of the illustrated example, a telescopic support column of a nested type is configured by slidingly inserting a telescopic leg 4b having a small cross-sectional shape into a main leg 4a having a large cross-sectional shape. However, the present invention is not limited to this.

Therefore, the outrigger device 6 of the present invention is mounted on the outer surface of at least one of the columns 4 and 4. In the case of the illustrated embodiment, the outrigger devices 6 and 6 are attached to both the columns 4 and 4, respectively. Although the drawings illustrate a stepladder 1a as the aerial work device 1, the outrigger device 6 of the present invention is a variety of aerial work devices provided with telescopic columns such as a ladder and a work table in addition to a stepladder. It should be understood that it can be attached arbitrarily.

Further, the outrigger device 6 of the present invention exhibits its original effect by being used by being mounted on the telescopic support column 4 of the aerial work device 1, but the aerial work device that does not change the work height. 1 can be mounted and used as it is on the non-stretchable struts provided in 1. In that sense, an aerial work device that varies the work height and an aerial work device that does not vary the work height. It is versatile.

<First Embodiment>
In the first embodiment shown in FIGS. 1 to 14, the outrigger device 6 includes a support member 7 attached to the support column 4, and a first arm 8 a and a second arm 8 b with respect to the support member 7. And an auxiliary leg 10 that is connected to the opening / closing mechanism 9 through an opening / closing mechanism 9. As shown in the figure, in a posture in which the outrigger device 6 is directed vertically with the support column 4, the first arm 8a is disposed on the upper portion of the outrigger device 6, and the second arm 8b is disposed below the first arm 8a. The closed leg position (shown by a solid line in FIGS. 1 and 2) along which the auxiliary leg 10 is placed along the support member 7, and the open leg position where the lower end of the auxiliary leg 10 is expanded to the side of the column 4 ( 1 and 2 (shown by a chain line). At this time, the first arm 8a is formed shorter than the second arm 8b. Thus, when the leg is opened, the auxiliary leg 10 has the lower end portion in the state where the upper end portion is brought close to the support member 7. It is possible to maintain a greatly expanded inclination posture.

(Slide guide mechanism and connecting means of support member)
Between the main leg 4a of the support column 4 and the support member 7, there is provided a slide guide mechanism 11 for connecting the support member 7 movably in the longitudinal direction of the main leg 4a. Connecting means 12 for connecting the members 7 to each other is provided.

In the case of the first embodiment, the fixing member 13 is fixed to the main leg 4 a of the support column 4, and the slide guide mechanism 11 is provided between the fixing member 13 and the support member 7. The fixing member 13 includes long rail members 14 and 14 that are fixed to both sides of the main leg 4a by fixing means such as bolts, and guide ribs 15 that oppose the rising edges of the rail members 14 and 14 to each other. Is provided. On the other hand, the support member 7 is constituted by a long groove-shaped member having a bottom wall 7a and both side walls 7b, and has guide grooves 16 that open laterally on the back side of both side edges of the bottom wall 7a. Provided. The fixing member 13 and the supporting member 7 having such a shape can be formed of a metal extruded material such as aluminum.

When the fixing member 13 is fixed to the main leg 4a, and the guide groove 16 of the supporting member 7 is slidably fitted to the guide rib 15 of the fixing member 13, the supporting member 7 is movable in the longitudinal direction of the main leg 4a. The slide guide mechanism 11 connected to is constructed.

In the illustrated example, the connecting means 12 is composed of a metal plate piece 17 that is positioned at the lower end of the support member 7 and is fixed to the back side of the bottom wall 7a by fixing means such as bolts. The extended end portion 17 is fixed to the vicinity of the lower end of the telescopic leg 4b by fixing means such as a bolt. As shown by a chain line in FIGS. 1 and 2, the fixing position of the extendable leg 4b and the connecting means 12 is the lower end of the auxiliary leg 10 when the auxiliary leg 10 is opened with the lower end of the extendable leg 4b grounded. Is set to be a position that is expanded at a predetermined height position that can be grounded. However, it is a matter of course that the connecting means 12 is not limited to the configuration shown in the figure. For example, a wall portion formed integrally with the support member 7 without using a separate metal plate piece 17 as shown in the figure. May be connected to the telescopic legs 4b by fixing them with screws or the like.

Therefore, when the telescopic leg 4b is inserted into the main leg 4a in order to contract the support column 4, the support member 7 follows the telescopic leg 4b by the connecting means 12, and the slide guide mechanism 11 is moved as shown in FIG. Then, the support member 7 is moved to the side surface position of the main leg 4a.

On the contrary, when the telescopic leg 4b is pulled out from the main leg 4a in order to extend the support column 4, the support member 7 follows the telescopic leg 4b by the connecting means 12, and as shown in FIG. The support member 7 is moved to the side surface position of the telescopic leg 4b via

Therefore, when the operator expands / contracts the support column 4 of the high-altitude work device 1 in order to cope with the low-altitude work and the high-altitude work at the work site, the outrigger device 6 is automatically extended only by expanding and contracting the support column 4. Can be moved to a predetermined position.

(First specific example of opening / closing mechanism)
10 to 13 show a first specific example of the opening / closing device 9.

As shown in FIGS. 10 and 11, the auxiliary leg 10 forms a groove 18a that opens toward the support member 7, and includes both side walls 18b and 18b of the groove 18a and a groove bottom wall 18c. In a state where the leg is closed at the closed leg position, the support member 7 is covered and the side walls 7b and 7b of the support member 7 are accommodated in the groove portion 18, thereby enabling a compact leg closed state.

The end cap 19 fixed to the upper end of the auxiliary leg 10 forms a groove 20a that communicates with the groove 18a and opens toward the support member 7, and the upper end of the auxiliary leg 10 is inserted into the groove 20a. The top end opening 20b is formed by opening the groove 20a in the top wall of the end cap 19. A grounding end tool 21 is fixed to the lower end of the auxiliary leg 10. Such an auxiliary leg 10 can be formed of a metal extrusion material such as aluminum, and the end cap 19 and the end tool 21 can be formed of a synthetic resin.

Each of the first arm 8a and the second arm 8b constituting the opening / closing mechanism 9 is pivotally connected by a first pivot 22 whose one end is pivotally supported on both side walls 7b, 7b of the support member 7. The other end is pivotally connected by a second pivot 23 pivotally supported on both side walls 18b, 18b of the auxiliary leg 10, and both arms 8a, with the auxiliary leg 10 closed at the closed leg position. 8b is stored between the side walls 7b, 7b of the support member 7 along the groove 18a of the auxiliary leg 10, and the longitudinal directions of both arms 8a, 8b and the auxiliary leg 10 are positioned in the same axial direction. doing. In the drawing, the first pivot axis and the second pivot axis of the first arm 8a are denoted by reference numerals 22a and 23a, respectively, and the first pivot axis and the second pivot axis of the second arm 8b are denoted by numerals 22b and 23b, respectively. In addition, it is preferable that a collar is extrapolated to the first pivot shafts 22a and 22b and the second pivot shafts 23a and 23b as illustrated. Further, as shown in FIGS. 8A and 8C, the second pivot shafts 23a and 23b pivoting the auxiliary leg 10 are provided on the side wall 18b of the groove portion of the auxiliary leg 10 and the side walls of the arms 8a and 8b. It is preferable to interpose a bush.

In the state where the auxiliary leg 10 is closed, the second pivot 23a of the first arm 8a is positioned above the upper ends of the side walls 7b, 7b of the support member 7, as shown in FIG. As shown in FIG. 11, the second pivot 23 b is located so as to cross both side walls 7 b and 7 b of the support member 7. For this reason, notches 7c for receiving the second pivot 23b of the second arm 8b in the closed leg state are formed on both side walls 7b, 7b of the support member 7.

As shown in FIGS. 10 and 11, with the auxiliary leg 10 closed, the first arm 8a and the second arm 8b position the first pivots 22a and 22b on the lower side and the second pivots 23a and 23b. It holds the upward posture positioned on the upper side, and the lock position M1 on the proximal end side of the arm extension portion 24 and the distal end thereof in the longitudinal direction of the arm extension portion 24 that pivotally supports the second pivots 23a and 23b. A pivot movement means 27 having an unlock position M2 on the side is extended.

The second pivots 23a and 23b are pivotally supported by the pivot movement means 27 so as to be movable between the lock position M1 and the unlock position M2 integrally with the auxiliary leg 10. At this time, in the case of the first specific example, the second pivot shafts 23a and 23b may be rotatable or non-rotatable with respect to the auxiliary leg 10.

In the case of the illustrated example, a tongue piece having an arc edge 24a protrudes from the extended end of the arm extension 24, and the pivot movement means 27 is formed by a long hole 26 extending toward the center of the arc edge 24a. By inserting the second pivot shafts 23a and 23b through the elongated holes 26, the second pivot shafts 23a and 23b are pivotally supported so as to be movable between the lock position M1 and the unlock position M2. In the case of the illustrated embodiment, the pivot movement means 27 is constituted by the long hole 26. However, the present invention is not limited to this. For example, the opposed end portions of the second pivots 23a and 23b divided into two are moved. In other words, the second pivot shafts 23a and 23b can be moved between the lock position M1 and the unlock position M2.

Therefore, the arm extension portion 24 is provided with an engaging portion 25A, while the groove bottom wall portion 18c of the auxiliary leg 10 is provided with an engaged portion 25B, and the engaging portion 25A and the engaged portion are provided. The lock means 25 which makes 25B mutually engageable is comprised. In the case of the first embodiment, the engaging portion 25A includes a closed leg engaging portion 25a and an open leg engaging portion 25b formed on both sides of the unlock position M2 of the arm extension portion 24.

As described above, the lock unit 25 preferably includes both the closed leg engaging part 25a and the open leg engaging part 25b, but may include at least one of them. In the illustrated example, the locking means 25 of the first arm 8a is provided with both the closed leg engaging portion 25a and the open leg engaging portion 25b, but the locking means 25 of the second arm 8b is provided with the closed leg engaging portion 25a. Thus, the opening / closing mechanism 9 is configured. However, in the present invention, for example, the opening / closing mechanism 9 may be configured by one second arm 8b, and the upper end of the auxiliary leg 10 may be directly connected to the support member 7 with a pin or the like. On the contrary, the opening / closing mechanism 9 may be constituted by one of the first arms 8a, and the lower part of the auxiliary leg 10 may be connected to the support member 7 by the expansion limiting means made of a flexible wire, belt or the like. .

(Closed leg lock)
In the illustrated embodiment, the auxiliary leg 10 can be locked in the closed state by the locking means 25 of both the first arm 8a and the second arm 8b.

When the auxiliary leg 10 is closed, the arms 8 a and 8 b are stored in the groove portion 18 a of the auxiliary leg 10 and overlapped with the auxiliary leg 10 on the same axis. Accordingly, when the second pivot shafts 23a and 23b are moved to the lock position M1 together with the auxiliary leg 10 with the auxiliary leg 10 closed, as shown in FIGS. 10 and 11, the second pivot shafts 23a and 23b are centered. As for the auxiliary leg 10 to be rotated in the opening direction, the engaging part 25A (closed leg engaging part 25a) of the arm extension 24 and the engaged part 25B (groove bottom wall part 18c) of the auxiliary leg 10 are mutually connected. Engagement, that is, they are caused to interfere with each other with respect to the rotation direction of the opening leg, thereby preventing the opening of the auxiliary leg 10.

From this state, when the second pivots 23a and 23b are moved together with the auxiliary legs 10 to the unlocked position M2, as shown in FIG. 12, the auxiliary legs 10 about the second pivots 23a and 23b are moved in the opening direction. Regarding the rotation, the engagement between the engagement portion 25A (closed leg engagement portion 25a) of the arm extension 24 and the engaged portion 25B (groove bottom wall portion 18c) of the auxiliary leg 10 is released, that is, the opening leg rotation direction. The auxiliary leg 10 can be opened by releasing without interference.

(Open leg lock)
In the illustrated embodiment, the auxiliary leg 10 can be locked in the open state by the locking means 25 of the first arm 8a.

When the auxiliary leg 10 is opened, the first arm 8a is stored in the groove 18a in a state of being turned downward from the first pivot 22a to the second pivot 23a by reversing from the closed leg state. The auxiliary leg 10 is disposed on the same axis. Therefore, when the auxiliary leg 10 is opened and the second pivot 23a is moved together with the auxiliary leg 10 to the lock position M1, the closing direction of the auxiliary leg 10 about the second pivot 23a is as shown in FIG. , The engaging portion 25A (open leg engaging portion 25b) of the arm extension 24 of the first arm 8a and the engaged portion 25B (groove bottom wall portion 18c) of the auxiliary leg 10 are engaged with each other. That is, they are caused to interfere with each other with respect to the closing leg rotation direction, thereby preventing the auxiliary leg 10 from closing.

When the second pivot 23a is moved to the unlock position M2 together with the auxiliary leg 10 from this state, the engaging portion of the arm extension 24 is related to the rotation of the auxiliary leg 10 about the second pivot 23a in the closed leg direction. 25A (open leg engaging portion 25b) and the engaged portion 25B (groove bottom wall portion 18c) of the auxiliary leg 10 are disengaged, that is, released without interfering in the closed leg rotation direction. The leg 10 is configured to be closed.

As described above, according to the configuration of the illustrated embodiment, when the legs are closed, the arms 8a and 8b are stored along the groove portions 18a of the auxiliary legs 10, thereby enabling a compact closed state. Then, when the auxiliary leg 10 is opened, the first arm 8a is inverted, and the first arm 8a is turned downward from the first pivot 22a pivoted to the support member 7 toward the second pivot 23a pivoted to the auxiliary leg 10. Since the auxiliary leg 10 is opened at the downward movement position together with the second pivot 23a, the lower end portion of the auxiliary leg 10 can be brought close to the ground contact surface.

(Effects of closed and open legs)
Preferably, a bullet urging means 28 for urging the second pivot 23a toward the lock position M1 is provided. Therefore, the second pivot 23a applies an external force against the bullet urging means 28. It is configured to move to the unlock position M2 only when given, and to return to and be held at the lock position M1 when released from the external force.

In the case of the illustrated embodiment, the elastic urging means 28 is constituted by a tension spring 29 stretched between the first pivot shaft 22a and the second pivot shaft 23a of the first arm 8a, but is limited to the configuration shown in the figure. Instead, the second pivot 23a may be biased toward the lock position M1 by a spring or the like that biases the auxiliary leg 10 itself.

Therefore, when the auxiliary leg 10 is opened from the closed leg state, the second pivots 23a and 23b are moved from the lock position M1 to the unlock position M2 by moving the auxiliary leg 10 upward against the bullet urging means 28. When the auxiliary leg 10 is moved away from the support member 7 in the state of moving to the first position, as shown in FIGS. 12 and 13, the first arm 8a and the second arm 8b are opened through the opening of the groove portion 18a of the auxiliary leg 10. Rotates, whereby the auxiliary leg 10 can be opened.

When the auxiliary leg 10 and the first arm 8a are rotated relative to each other, the second urging shaft 23a tends to move toward the first fulcrum 22a together with the auxiliary leg 10 by the elastic biasing means 28. When the groove bottom wall portion 18c comes into contact with the arc edge 24a provided on the tongue piece of the arm extension 24, the movement is prevented, so by sliding the groove bottom wall portion 18c along the arc edge 24a, Mutual rotation of the auxiliary leg 10 and the first arm 8a is facilitated.

When the auxiliary leg 10 is opened from the closed leg position to the open leg position, as shown in FIG. 13, the first arm 8a is inverted by entering the top end opening 20b of the end cap 19, and the inverted first arm When 8a is retracted along the groove portion 18a of the auxiliary leg 10, the second pivot 23a is moved to the lock position M1 of the long hole 26 and held by the elastic urging means 28. In this inverted state, the first arm 8a supports the second pivot 23a by the upper end portion (the end portion corresponding to the lock position M1) of the long hole 26 located on the base end side of the arm extension portion 24, so that the auxiliary leg The end tool 21 at the lower end of the auxiliary leg 10 can be grounded in a state where the upward movement of the auxiliary 10 is prevented. Then, the inverted first arm 8a has the engaging portion 25A (closed leg engaging portion 25a) of the arm extension portion 24 turned downward along the engaged portion 25B (groove bottom wall portion 18c) of the auxiliary leg 10. Thus, the auxiliary leg 10 is held in a state in which it cannot rotate in the closed leg direction.

In the open leg state, as shown in FIG. 7, the second arm 8b maintains an upward inclined posture from the first pivot 22b toward the second pivot 23b. At this time, the long hole 26 is at an angle with respect to the horizontal line H. As shown by θ, the posture is downward, and the second pivot 23b is suitably supported by the upward end of the long hole 26 (the end corresponding to the unlock position M2).

When the auxiliary leg 10 is closed from the open leg state shown in FIG. 13, when the auxiliary leg 10 is pulled downward, the second pivot 23a of the first arm 8a corresponds to the lower end portion of the long hole 26 (corresponding to the unlock position M2). The engaging leg 25A (closed leg engaging part 25a) of the arm extension 24 and the auxiliary leg 10 are engaged with respect to the rotation of the auxiliary leg 10 around the second pivot 23a in the closing leg direction. Since the mutual engagement of the joint portion 25B (groove bottom wall portion 18c) is released and released from interference, the auxiliary leg 10 can be closed as shown by a chain line in FIG.

When the leg is closed, the second arm 8b rotates in the standing direction around the first pivot 22b, and retracts along the groove 18a of the auxiliary leg 10 while moving the second pivot 23b along the long hole 26. Is done. At this time, the arc edge 24a of the tongue protruding from the arm extension 24 of the second arm 8b can be slid while being in contact with the groove bottom wall 18c of the auxiliary leg 10, and the second arm 8b can be slid. After the legs 10 are preferably rotated with the second pivot 23b as a fulcrum, the second pivot 23b is moved to the lock position M1 as shown in FIG. Close the leg lock along 18c.

The illustrated locking means 25 is configured to release the open leg lock by pulling the auxiliary leg 10 downward when the auxiliary leg 10 is closed from the open leg state. As shown, the auxiliary leg 10 is formed so that the end tool 21 at the lower end is slightly lifted from the grounding surface in the open leg state. Since this lifting dimension S is actually very small, it does not affect the practical function of the outrigger. The end tool 21 may be configured to project downward from the lower end of the auxiliary leg 10 by a spring or the like.

<Second Specific Example of Opening and Closing Mechanism>
14 to 18 show a second specific example of the opening / closing mechanism 9. The main configuration different from the first specific example described above is that the first specific example is provided with the engaging portion 25A provided on the arm extension 24 of the first arm 8a and the cover provided on the groove bottom wall portion 18c of the auxiliary leg 10. Whereas the locking means 25 is constituted by the engaging portion 25B, in the second specific example, the engaging portion 25A provided in the pivot movement means 27 of the first arm 8a and the second integrated with the auxiliary leg 10 are provided. The locking means 25 is constituted by the engaged portion 25B provided on the pivot 23a. Therefore, the description of the configuration common to the first specific example is omitted, and the configuration of the locking unit 25 different from the first specific example will be described in detail.

As shown in FIGS. 14 and 15, the first arm 8 a is provided with a pivot moving means 27 including a long hole 26 extending in the longitudinal direction of the arm extension 24 that pivotally supports the second pivot 23 a. The moving means 27 includes a lock position M1 on the proximal end side of the arm extension 24 and an unlock position M2 on the distal end side. The pivot movement means 27 is not limited to the long hole 26, and may be, for example, a groove that pivotally supports the opposite end portion of the second pivot shaft 23a divided in two. This is the same as the first specific example.

In the second specific example, the second pivot 23a has circular arc surfaces formed at both ends of the long axis having a width dimension W1 corresponding to the diameter of the virtual circle C with respect to the circular cross section shown as the virtual circle C in FIG. The long diameter portions 30 and 30 are provided, and the short diameter portions 31 and 31 having flat surfaces formed at both ends of the short axis having a width dimension W2 (W2 <W1) orthogonal to the long axis are provided.

On the other hand, the pivot movement means 27 has a wide bearing portion 32 that draws a substantially circular shape that can receive the virtual circle C provided at the unlock position M2, and a peripheral edge of the bearing portion 32 toward the lock position M1. A narrowed narrow portion 33 having an extended width W3 (W2 ≦ W3 <W1) is formed, and a communication port 34 is provided to allow the bearing portion 32 and the narrowed portion 33 to communicate with each other.

The second pivot 23a is inserted into a long hole 26 constituting the pivot movement means 27 of the first arm 8a, and both ends are fixed to the side walls 18b, 18b of the auxiliary leg 10. In the case of the illustrated embodiment, shaft support holes 34 that match the cross-sectional shape of the second pivot shaft 23a are provided at predetermined positions on the side walls 18b, 18b of the auxiliary leg 10, and both end portions of the second pivot shaft 23a are formed in the shaft support hole 34. By fitting, the auxiliary leg 10 and the second pivot 23a are fixed to each other, and are configured to move integrally and rotate integrally. In the case of the illustrated example, as shown by a chain line in FIG. 14, the end cap 19 is covered with the auxiliary leg 10 so as to cover both end portions of the second pivot 23a, thereby preventing the second pivot 23a from being removed. Is formed.

As shown in FIG. 15A, in the state where the first arm 8a is housed in the groove portion 18a of the auxiliary leg 10 and they are overlapped in the same axial direction, the second pivot 23a faces the lock position M1 and pivots. The engagement portion 25B formed by the engagement portion 25A formed on both side edges of the narrowing portion 33 and the short diameter portions 31 and 31 of the second pivot 23a is inserted through the narrowing portion 33 of the moving means 27. The lock means 25 is configured.

In the case of the illustrated example, also in the second specific example, the closed leg engaging portion 25a and the open leg engaging portion 25b described as the locking means of the first specific example are provided in the first arm 8a. According to the lock means 25 of the example, it is not always necessary to provide such a closed leg engaging part 25a and an open leg engaging part 25b.

In this state, the locking means 25 is locked so as to prevent the mutual rotation of the second pivot 23a and the pivot movement means 27, but the second pivot 23a moves between the lock position M1 and the unlock position M2. It is possible. Therefore, when the second pivot 23 a is moved together with the auxiliary leg 10 to the unlock position M 2, the short diameter portions 31, 31 are released from the narrowed portion 33, thereby unlocking the locking means 25. The pivot 23 a is rotatable inside the bearing portion 32.

As shown in FIG. 15B, when the second pivot 23 a is rotated together with the auxiliary leg 10 inside the bearing portion 32, the long diameter portions 30, 30 are rotated along the bearing portion 32 and the short diameter portion 31. , 31 is displaced so as to intersect the communication port 34. Therefore, in this deviated state, the long diameter portion 30 of the second pivot shaft 23a interferes with the communication port 34, and the unlock holding means 35 is configured so that the second pivot shaft 23a cannot enter the narrowed portion 33.

By further rotating the second pivot 23a together with the auxiliary leg 10, the first arm 8a is reversed, and the auxiliary leg 10 and the first arm 8a are arranged so as to extend in the same axial direction (see FIG. 18). 30 faces the communication port 34, and both side edges of the short diameter portions 31, 31 and the narrowed portions 33, 33 are in a parallel state, so that the holding by the unlock holding means 35 is released, and the second pivot 23a is moved. It becomes possible to move from the unlock position M2 to the lock position M1.

(Effects of closed and open legs)
As in the case of the first specific example, a tension spring 29 is stretched between the first pivot shaft 22a and the second pivot shaft 23a of the first arm 8a, thereby bringing the second pivot shaft 23a into the lock position M1. The second pivot 23a moves to the unlock position M2 only when an external force is applied against the bullet urging means 28, and the second fulcrum urging means 28 is urged toward the unlocking position M2. When released, it returns to the lock position M1 and is held.

When the auxiliary leg 10 is in the closed leg state, as shown in FIGS. 15A and 16A, the first arm 8a is stored in the groove 18a of the auxiliary leg 10 and overlaps with each other in the same axial direction. The second pivot 23a attracted by the bullet urging means 28 is held at the unlocked position M2, and the first arm 8a and the auxiliary leg 10 are locked so as not to rotate relative to each other by the locking means 25. Accordingly, when the auxiliary leg 10 is opened from the closed leg state, as shown by an arrow U in FIG. 16B, the auxiliary leg 10 is moved upward against the elastic urging means 28, thereby the second leg. When the pivots 23a and 23b are moved from the lock position M1 to the unlock position M2, the lock means 25 is unlocked, and the auxiliary leg 10 and the first arm 8a can be rotated relative to each other, so that the auxiliary leg 10 is supported. By moving away from the member 7, the auxiliary leg 10 can be opened.

While the auxiliary leg 10 is opened from the closed leg position to the open leg position, as shown in FIGS. 15B and 17, the second holding shaft 23 a cannot enter the narrowed portion 33 by the unlock holding means 35. Held in the bearing portion 32. Therefore, it is not necessary for the user to keep holding the second pivot 23a on the bearing portion 32 against the elastic urging means 28 by manual work, and the user simply needs to open the auxiliary leg 10 to the open leg position. .

When the auxiliary leg 10 is opened to the open position, as shown in FIG. 18, the first arm 8a is reversed with the first pivot 22a as a pivot, and the auxiliary leg 10 and the first arm 8a are in the same axial direction. It is arrange | positioned so that it may extend. In this state, the long diameter portion 30 of the second pivot 23a faces toward the communication port 34 of the pivot movement means 27, and the holding by the unlock holding means 35 is released. Accordingly, the second pivot 23a together with the auxiliary leg 10 is immediately moved from the unlocked position M2 to the locked position M1 by the elastic biasing means 28, and the auxiliary leg 10 and the first arm 8a cannot be rotated relative to each other by the locking means 25. The auxiliary leg 10 is locked and held in an open state in which the auxiliary leg 10 cannot be rotated in the closed leg direction.

In the illustrated embodiment, the locking means 25 of the second specific example is provided in the first arm 8a, but may be provided in the second arm 8b as well, whichever of the first arm 8a and the second arm 8b. Or at least one of them.

Furthermore, the locking means 25 of the second specific example is not limited to the configuration shown in the figure. For example, the long diameter portion 30 and the short diameter portion 31 of the second pivot 23a are elliptical in cross-sectional shape of the second pivot 23a. It may be formed by a shape or a polygon. In short, when the second pivot shaft 23a is moved to the unlock position M2, the bearing portion 32 is rotatable, and when the second pivot shaft 23a is moved to the lock position M1, the constricted portion 33 is formed. What is necessary is just to fix so that rotation is impossible by fitting to.

<Another embodiment of slide guide mechanism>
The slide guide mechanism 11 can have various configurations other than the above-described configuration. In short, when the telescopic leg 4b of the column 4 is expanded and contracted with respect to the main leg 4a, the connecting member 12 supports the support member 7. As long as the support member 7 can be moved with respect to the column 4, the support member 7 may be moved appropriately.

Second Embodiment
FIG. 19A shows a second embodiment of the slide guide mechanism 11. The fixing member 13 is formed of a gate-shaped member fixed to the main leg 4a, and a pair of rail portions 14a and 14a are formed on the surface of the fixing member 13, and the standing edges of the rail portions 14a and 14a are formed. Are provided with guide ribs 15a extending in the opposite direction. On the other hand, the support member 7 is provided with guide grooves 16a that open opposite to each other on the back sides of both side edges of the bottom wall 7a. Therefore, the guide groove 16a of the support member 7 is slidably fitted to the guide rib 15a of the fixing member 13, and thereby the slide guide mechanism 11 for connecting the support member 7 movably in the longitudinal direction of the main leg 4a. It is composed.

In the illustrated example, the guide rib 15a is provided in the rail portion 14a and the guide groove 16a is provided in the support member 7. Conversely, the guide rib 15a is provided in the support member 7 and the guide groove 16a is provided in the rail portion. 14a may be provided.

<Third Embodiment>
FIG. 19B shows a third embodiment of the slide guide mechanism 11, and the slide guide mechanism 11 is provided between the main leg 4 a of the support column 4 and the support member 7. That is, the fixing member 13 as in the first and second embodiments described above is not provided.

The main leg 4a of the support column 4 is integrally formed with a pair of rail portions 14b and 14b on the surface, and guide ribs 15b that are opposed to each other at the rising edges of the rail portions 14b and 14b. On the other hand, the support member 7 is provided with guide grooves 16b that open outwardly on the back side of both side edges of the bottom wall 7a. Therefore, the slide guide mechanism 11 for slidably fitting the guide groove 16b of the support member 7 to the guide rib 15b of the main leg 4a and movably connecting the support member 7 in the longitudinal direction of the main leg 4a is provided. It is composed.

In the illustrated example, the guide rib 15b is provided in the rail portion 14b and the guide groove 16b is provided in the support member 7. Conversely, the guide rib 15b is provided in the support member 7 and the guide groove 16b is provided in the rail portion. 14b may be provided.

<Fourth embodiment>
FIG. 19C shows a fourth embodiment of the slide guide mechanism 11, and the slide guide mechanism 11 is provided between the main leg 4 a of the support column 4 and the support member 7. That is, the fixing member 13 as in the first and second embodiments described above is not provided.

The main leg 4a of the support column 4 is formed with a slit 37 extending in the longitudinal direction in a pedestal portion 36 integrally formed on the surface. On the other hand, the support member 7 forms a slider portion 38 on the bottom wall 7 a, and the slider portion 38 is engaged with the neck portion 38 a slidably inserted into the slit 37 and the inner surface of the pedestal portion 36. A retaining portion 38b is provided. Therefore, the slide guide for slidably fitting the neck portion 38a of the slider portion 38 of the support member 7 to the slit 37 of the main leg 4a, thereby movably connecting the support member 7 in the longitudinal direction of the main leg 4a. A mechanism 11 is configured.

In the example shown in the figure, the slit 37 is provided in the pedestal portion 36 and the slider portion 38 is provided in the support member 7. Conversely, the slit 37 is provided in the support member 7 and the slider portion 38 is provided in the pedestal portion. 36 may be provided.

DESCRIPTION OF SYMBOLS 1 Height work apparatus 1a Stepladder 2 Leg body 3 Top plate 4 (Extension | stretching) support | pillar 4a Main leg 4b Telescopic leg 5 Tread 6 Outrigger device 7 Support member 7a Bottom wall 7b Side wall 7c Notch 8a 1st arm 8b 2nd arm DESCRIPTION OF SYMBOLS 9 Opening / closing mechanism 10 Auxiliary leg 11 Slide guide mechanism 12 Connection fixing means 13 Fixing member 14 Rail member 15 Guide rib 16 Guide groove 17 Metal plate piece 18a (Auxiliary leg) Groove 18b Side wall 18c Groove bottom 19 End cap 20a Groove 20b Top end opening 21 End tool 22 First pivot 23 Second pivot 24 Arm extension 24a Arc edge 25 Locking means 25A Engaging part 25B Engagement part 25a Closed leg engaging part 25b Open leg engaging part 26 Long hole 27 Axis moving means 28 Bounce Energizing means 29 Tension spring 30 Long diameter part 31 Short diameter part 32 Bearing part 33 Narrow part 34 Communication port 35 Unlock holding means 36 Base 3 Slit 38 slider section 38a neck 38b retaining part

Claims (9)

In an aerial work device having a support post (4) provided with a main leg (4a) and an extendable leg (4b) that is extendable from the lower end of the main leg, an outrigger device provided on a side surface of the support post (4) Yes,
The outrigger device (6) comprises a support member (7) attached to the support column, and an auxiliary leg (10) provided on the support member via an opening / closing mechanism (9),
The opening / closing mechanism (9) has a closed leg position in which the auxiliary leg (10) is placed along the support member (7), and a lower end portion of the auxiliary leg (10) is expanded to the side of the column (4). The auxiliary leg (10) and the support member (7) are connected to each other so that they can be opened and closed between the open leg positions.
Between the main leg (4a) of the support column (4) and the support member (7), there is provided a slide guide mechanism (11) for movably connecting the support member in the longitudinal direction of the main leg, and the support column (4 ) And a support means (12) for connecting the support member (7) to each other, and the support member (7) is configured to move along with the extension / contraction movement of the extension / contraction leg (4b). An outrigger device in an aerial work device, characterized by comprising: The slide guide mechanism (11) is provided between a fixing member (13) fixed to a main leg (4a) of a support column (4) and a support member (7). An outrigger device in an aerial work device according to claim 1. The outrigger device in an aerial work device according to claim 1, wherein the slide guide mechanism (11) is provided between the main leg (4a) of the support column (4) and the support member (7). . The auxiliary leg (10) forms a groove (18a) that opens toward the support member (7),
The opening / closing mechanism (9) is positioned above the outrigger device, and is positioned below the first arm, and a first arm (8a) rotatably connecting the support member (7) and the auxiliary leg (10). And the second arm (8b) that rotatably connects the support member (7) and the auxiliary leg (10). When the auxiliary leg (10) is closed, both arms (8a, 8b) (18a) and the first arm (8a) is shorter than the second arm (8b).
The first arm (8a) has one end pivoted to the support member (7) by the first pivot (22a) and the other end pivoted to the auxiliary leg (10) by the second pivot (23a).
The second arm (8b) has one end pivoted to the support member (7) by the first pivot (22b) and the other end pivoted to the auxiliary leg (10) by the second pivot (23b).
When the auxiliary leg (10) is closed, the first arm (8a) is in an upward posture from the first pivot (22a) toward the second pivot (23a), and when the auxiliary leg (10) is opened. The work at a high place according to claim 1, 2 or 3, characterized in that it is configured to be turned downward from the first pivot (22a) to the second pivot (23a) by reversing. Outrigger device in the device. The opening / closing mechanism (9) has one end pivotally connected to the column side member (4P) by the first pivot (22a, 22b) and the other end supported by the second pivot (23a, 23b). The arm (8a, 8b) and the auxiliary leg (10) in the longitudinal direction with at least one arm (8a, 8b) pivotally connected to the auxiliary leg (10). Are arranged in the same axial direction,
The arm (8a, 8b) includes a pivot movement means (27) extending in the longitudinal direction of an arm extension (24) that pivotally supports the second pivot axis (23a, 23b), and the pivot movement means (27) Has a lock position (M1) on the proximal end side of the arm extension (24) and an unlock position (M2) on the distal end side,
The second pivot (23a, 23b) is configured to move between the lock position (M1) and the unlock position (M2) integrally with the auxiliary leg (10),
The locking means (25) is constituted by the engaging part (25A) provided in the arm extension part (24) and the engaged part (25B) provided in the auxiliary leg (10),
When the locking means (25) moves the second pivot (23a, 23b) to the locked position (M1) together with the auxiliary leg (10) in the open leg state or the closed leg state, the second pivot axis (23a, 23b) with respect to the rotation direction, the engagement portion (25A) and the engaged portion (25B) are mutually engaged to prevent the rotation,
When the second pivot shaft (23a, 23b) is moved to the unlocked position (M2) together with the auxiliary leg (10) in the open or closed leg state, the second pivot shaft (23a, 23b) is centered With respect to the rotation direction of the leg (10), the engagement portion (25A) and the engaged portion (25B) are configured to be disengaged to enable the rotation. The outrigger device in an aerial work device according to claim 1, 2, 3, or 4. Auxiliary that can be opened and closed between a closed leg position along the column side member (4P) including the support column (4) of the aerial work device and an open leg position that is widened to the side of the column side member (4P). An outrigger device comprising a leg (10) and an opening / closing mechanism (9) capable of opening and closing the auxiliary leg (10);
The opening / closing mechanism (9) has one end pivotally connected to the column side member (4P) by the first pivot (22a, 22b) and the other end supported by the second pivot (23a, 23b). The arm (8a, 8b) and the auxiliary leg (10) in the longitudinal direction with at least one arm (8a, 8b) pivotally connected to the auxiliary leg (10). Are located in the same axial direction, and the arms (8a, 8b) are stored along the groove portions (18a) of the auxiliary legs (10), and the side portions of the arms (8a, 8b) are inserted into the grooves of the groove portions (18a). Configured to overlap the bottom wall (18c),
The arm (8a, 8b) includes a pivot movement means (27) extending in the longitudinal direction of an arm extension (24) that pivotally supports the second pivot axis (23a, 23b), and the pivot movement means (27) Has a lock position (M1) on the proximal end side of the arm extension (24) and an unlock position (M2) on the distal end side,
The second pivot (23a, 23b) is configured to move between the lock position (M1) and the unlock position (M2) integrally with the auxiliary leg (10),
Engagement portion (25A) provided on the side of unlocking position (M2) of arm extension portion (24) and engaged portion provided on groove bottom wall portion (18c) of auxiliary leg (10) The locking means (25) is constituted by the part (25B),
The locking means (25) is moved when the second pivot (23a, 23b) is moved to the locking position (M1) together with the auxiliary leg (10) with the auxiliary leg (10) closed or opened. With respect to the rotation direction about the two pivots (23a, 23b), the engagement portion (25A) and the engaged portion (25B) interfere with each other to prevent the rotation,
When the second pivot shaft (23a, 23b) is moved to the unlocked position (M2) together with the auxiliary leg (10) in the open or closed leg state, the second pivot shaft (23a, 23b) is centered With respect to the rotation direction of the leg (10), the rotation is made possible by releasing the interference between the engagement portion (25A) and the engaged portion (25B). The outrigger apparatus in the aerial work device according to claim 5. Auxiliary that can be opened and closed between a closed leg position along the column side member (4P) including the support column (4) of the aerial work device and an open leg position that is widened to the side of the column side member (4P). An outrigger device comprising a leg (10) and an opening / closing mechanism (9) capable of opening and closing the auxiliary leg (10);
The opening / closing mechanism (9) has one end pivotally connected to the column side member (4P) by the first pivot (22a, 22b) and the other end supported by the second pivot (23a, 23b). The arm (8a, 8b) and the auxiliary leg (10) in the longitudinal direction with at least one arm (8a, 8b) pivotally connected to the auxiliary leg (10). Are arranged in the same axial direction,
The arm (8a, 8b) includes a pivot movement means (27) extending in the longitudinal direction of an arm extension (24) that pivotally supports the second pivot axis (23a, 23b), and the pivot movement means (27) Is provided with a lock position (M1) on the proximal end side of the arm extension portion (24) and an unlock position (M2) on the distal end side, and a wide bearing portion (32) provided at the unlock position (M2), Form a narrow constriction (33) from the bearing to the lock position (M1),
The second pivot (23a, 23b) moves between the locking position (M1) and the unlocking position (M2) integrally with the auxiliary leg (10) and is integrated with the auxiliary leg (10). A long diameter portion (30) that is rotatable inside the bearing portion (32) and cannot enter the constricted portion (33) with respect to the cross-sectional shape of the second pivot (23a, 23b). ), And a short diameter portion (31) that can enter the narrowed portion (33),
An engaged portion (25A) formed by the narrowed portion (33) of the pivot movement means (27) and an engaged portion (31) formed by the short diameter portion (31) of the second pivot (23a, 23b) 25B) constitutes the locking means (25),
The locking means (25) is moved when the second pivot (23a, 23b) is moved to the locking position (M1) together with the auxiliary leg (10) with the auxiliary leg (10) closed or opened. With respect to the rotation direction around the two pivots (23a, 23b), the rotation is prevented by engaging the narrowed portion (33) and the short diameter portion (31) with each other,
When the second pivot shaft (23a, 23b) is moved to the unlocked position (M2) together with the auxiliary leg (10) in the open or closed leg state, the second pivot shaft (23a, 23b) is centered By releasing the engagement of the narrowed portion (33) and the short diameter portion (31) with respect to the turning direction of the leg (10), the second pivot (23a, 23b) is pivotally supported by the bearing portion (32). 6. The outrigger device in an aerial work device according to claim 5, wherein the outrigger device is configured to enable the rotation. The second pivot (23a, 23b) is moved to the unlocked position (M2) together with the auxiliary leg (10) in the open or closed state, and the second pivot (23a, 23b) is moved together with the auxiliary leg (10). When the bearing portion (32) is rotated, the long diameter portion (30) of the second pivot (23a, 23b) is prevented from entering the constricted portion (33), thereby unlocking holding means (35). The outrigger device in an aerial work device according to claim 7, wherein the outrigger device is configured as described above. A bullet urging means (28) for urging the second pivot (23a) toward the lock position (M1) is provided, and the second pivot (23a) against the bullet urging means (28). ) Is configured to be movable to the unlock position (M2), the outrigger device in an aerial work device according to claim 5, 6, 7 or 8.

Images