JP6761689B2 - Operation device of the telescopic lock mechanism in the telescopic leg device - Google Patents

Description

The present invention relates to an operating device for operating a telescopic lock mechanism in a telescopic leg device provided in a stepladder, a workbench, or an aerial work device such as a ladder.

Conventionally, a telescopic landing gear device in a high-place work device such as a stepladder is composed of a main landing gear and a telescopic leg that is slidable along the main landing gear, and a large number of telescopic legs are arranged in a row in the sliding direction. Along with providing rack teeth, a bracket attached to the main landing gear is provided with a locking lever provided with locking teeth that engage and disengage with the rack teeth, thereby forming a telescopic locking mechanism.

Therefore, by releasing the lock of the telescopic lock mechanism and sliding the telescopic legs to lock the telescopic lock device again with the legs set to a predetermined length, the boarding position of the operator can be desired. It is possible to work in high places with the height set.

For example, in the case of a stepladder, it is generally configured as shown in FIGS. 1 and 2, and includes a first leg body 1a and a second leg body 1b arranged on the left and right, and upper ends of both leg bodies 1a and 1b. By pivoting the portions to each other by pivoting means (not shown), the opening / closing device 2 is provided so as to be openable / closable and connected in an open state.

The first leg body 1a and the second leg body 1b are provided with a top plate 3 between a pair of pedestals 1c and 1c, respectively, and a plurality of crosspieces including the lowermost crosspiece member 4a and the upper tread rail 4b are erected. Each pedestal 1c is formed in a ladder shape, and each pedestal 1c constitutes a telescopic leg device including a main leg 5 and a telescopic leg 6 slidably inserted into the main leg 5.

As shown in FIG. 2, the telescopic landing gear 6 is provided with a band-shaped rack 7 having a large number of rack teeth 7a arranged in a row in the sliding direction, and the main landing gear 5 is provided with the main landing gear 5. A locking lever 14 is provided that engages and disengages with the teeth 7a of the rack 7 from the fixing portion 8 fixed near the lower end, whereby the telescopic locking mechanism 9 is configured. The fixing portion 8 is composed of both or one of a lowermost crosspiece member 4a and a lowermost crosspiece bracket 10a for fixing the crosspiece member 4a to the main landing gear 5.

The main landing gear 5, the telescopic landing gear 6, the crosspiece member 4a, and the treadle 4b are each formed of an extruded aluminum material. The main leg 5 is formed of a groove-shaped member having a groove-shaped cross section that opens toward the inside of the pedestal 1c, and a guide cylinder 11 is fixed to the lower end portion. The telescopic leg 4a is the guide cylinder. The body 11 is inserted and slidably fitted into the inside of the main leg 5, and the rack teeth 7a face the groove-shaped opening of the main leg 5.

The crosspiece members 4a and treads 4b are formed in a substantially square tubular shape, and are fixed to both outer surfaces of the main landing gear 5 with both ends facing the grooves of the main landing gear 5. Two ribs 12 parallel to the lower surface are provided. The crosspiece 4a is fixed via the bracket 10a, and the tread 4b is fixed via the bracket 10b.

The telescopic lock mechanism 9 is composed of the rack tooth 7a and a locking lever 14 provided with a locking tooth 16 that engages and disengages with the rack tooth 7a. The locking lever 14 has a pivot 13 attached to the fixing portion 8. A spring 15 is provided which is pivotally supported so as to swing in the forward and reverse rotation directions and elastically urges the locking lever 14 in the forward rotation direction.

The locking lever 14 is provided with the locking teeth 16 on the front surface of an arm extending from a bearing portion pivotally supported by the pivot 13 toward the rack 7, and on the opposite side of the arm to the lower side of the crosspiece member 4a. A tail 17 extending toward the tail 17 is provided.

The spring 15 includes a pair of coil portions located on both sides of the locking lever 14 and externally attached to the pivot 13, an urging portion 18 extending from one end of both coil portions and connected in a portal shape, and the like. A bullet support portion 19 extending from an end portion is provided, the biasing portion 18 is brought into contact with the upper surface of the tail portion 17 of the locking lever 14, and the bullet support portion 19 is attached to a receiving surface 20 formed by the lower surface of the crosspiece member 4a. It is in contact with the bullet.

As a result, as shown in FIG. 2, the locking lever 14 is pushed down by the spring 15 as shown by the arrow D in the drawing, thereby being rotationally urged in the forward rotation direction A1 and racking the locking teeth 16. Locks to the rack teeth 7a of 7. Then, when the operator pushes up the tail portion 17 against the spring with a fingertip or the like as indicated by the arrow U, the locking lever 14 rotates in the reverse direction A2, so that the locking tooth 18 is pushed up by the rack tooth 7a. Withdraw from.

Japanese Unexamined Patent Publication No. 2011-226061

The telescopic landing gear device is provided with a telescopic lock mechanism 9 that engages and disengages the locking teeth 16 with the rack teeth 7a so that the telescopic legs 6 can be expanded and contracted with respect to the main landing gear 5 and a predetermined expansion and contraction. The telescopic leg 6 can be locked at the position. Therefore, the working height position of the aerial work device can be arbitrarily selected, and it is convenient that the telescopic legs can be compactly transported and stored in a state of being retracted and stored in the main landing gear.

By the way, as described above, the telescopic lock mechanism 9 engages and disengages the locking teeth 16 of the locking lever 14 with the rack teeth 7a arranged in a row in the longitudinal direction of the telescopic legs 6. It is configured to fix. Therefore, in order to secure the expansion / contraction stroke of the expansion / contraction leg 6, that is, the locking tooth 16 is configured to be able to engage and disengage from the rack tooth 7a in both the maximum extension state and the minimum contraction state of the expansion / contraction leg 6. For this purpose, it is a necessary condition that the locking lever 14 is provided near the lower end of the main landing gear 5.

However, as a result, the operator needs to operate the locking lever 14 arranged near the lower end of the pedestal 1c when unlocking the telescopic locking mechanism 9 in order to expand and contract the telescopic leg 6. is there. Therefore, each time the operator operates the locking lever 14, he / she is forced to lift the work table at a high place or to take a low posture by himself / herself, and is forced to perform complicated work. Moreover, it is necessary to perform such complicated work for all of the plurality of pedestals 1c.

In this regard, in order to facilitate the engagement / disengagement operation of the telescopic lock mechanism, it is considered to provide an operating device that enables the locking lever 14 to be remotely controlled from the position above the pedestal 1c, but in addition to the telescopic lock mechanism. Therefore, assembling a large number of parts for the operating device increases the burden on the assembly and is not preferable.

In view of the above, the present invention provides an operating device capable of remotely controlling the engagement / disengagement operation of the telescopic lock mechanism arranged at a low position of a high-place workbench at a high position, and expands / contracts such an operating device. The main issue is to provide a device configured so that it can be unitized together with the components of the lock mechanism.

Therefore, in order to solve the above problems, the present invention has been configured as a means in a telescopic leg device in which a slidable telescopic leg is fitted into the main leg of a high-place work device, the telescopic lock mechanism and the telescopic lock. An operation device for operating the mechanism is provided, and the telescopic lock mechanism faces the rack teeth at an operating position facing the lower end of the main leg and a large number of rack teeth provided in the sliding direction of the telescopic leg. It is composed of a locking means provided with locking teeth, and is configured to lock the locking teeth to the rack teeth when the locking means is advanced and to separate the locking teeth from the rack teeth when the locking means is retracted. The operating device is arranged along the main leg, and is composed of an operating body having an upper end portion facing the operating position above the upper end of the telescopic leg from the lower end portion facing the operating position. The locking means is provided at the lower end portion, and the manual operation portion is provided at the upper end portion. The operating body is swingably supported via a pivot axis, and the manual operating portion is separated from the main leg. When the lock means is swung in the locking direction with the direction as the locking direction, the telescopic lock mechanism is locked by advancing the locking means, and the manual operation unit swings in the disengaging direction with the direction toward the main leg as the disengaging direction. The point is that the telescopic lock mechanism is unlocked by retracting the locking means when it is moved.

At this time, it is preferable to provide an urging means for urging the operating body in the locking direction, and further, the manual operating unit engages and disengages the main landing gear at a position where the operating body is swung in the locking direction. It is preferable to provide a safe operation means for freely locking.

In a preferred embodiment, the safety operating means is provided with an operating lever rotatably attached to the upper end portion of the operating body via a shaft portion, and the operating lever is from the shaft portion to the main leg. An engagement / disengagement portion extending toward the facing wall and an operation portion extending on the opposite side of the engagement / disengagement portion are provided, and a spring for rotating and urging the operation lever so that the engagement / disengagement portion faces the facing wall is provided. By contacting the engaging / disengaging portion with the facing wall of the main leg in an opposed posture, the operating body is prevented from swinging in the detaching direction, and the engaging / disengaging portion is displaced from the opposed posture via the operating portion. It is configured to allow the operating body to swing in the detaching direction by rotating it toward the posture.

According to the present invention, since the operation device 39 that enables the engagement / disengagement operation of the telescopic lock mechanism 37 arranged at a low position of the workbench at a high position to be remotely controlled at a high position is provided, the operator can remotely control the telescopic leg 32. When the telescopic lock mechanism 37 is unlocked in order to expand and contract the workbench, it is not necessary to lift the workbench at a high place or to take a low posture, and there is an effect that the work can be performed easily and easily.

Moreover, the operating device 39 can be implemented by axially attaching the operating body 40 to the pivot 42. At this time, the operating device 39 constitutes a unit to which the locking means 38 of the telescopic locking mechanism 37 is assembled. By mounting such a unit on an aerial work device having a telescopic leg device including a telescopic leg 32 having a rack 36 and a main leg 31, a telescopic lock mechanism 37 and an operating device 39 can be provided. It is possible and has the advantage of being versatile.

Then, as described in claim 2, if the operating body 40 is provided with the urging means 49, the telescopic lock mechanism 37 can be automatically locked, and the operating body 40 is manually operated only when the lock is released. The work is easy because the unit 41 may be operated from the operation position P2.

At this time, if the manual operation unit 41 is provided with the safety operation means 51 as described in claims 3 and 4, the operation body 40 is accidentally detached while the telescopic lock mechanism 37 is locked by the lock means 38. It is safe because it swings in the direction M2 and is not unintentionally unlocked.

A stepladder as an example of an aerial work platform is shown, and is a perspective view showing a stepladder provided with a conventional general telescopic leg device and a telescopic lock mechanism. It is sectional drawing which enlarges and shows the part shown by the arrow E of FIG. It is a perspective view which shows the expansion / contraction leg device, the expansion / contraction lock mechanism, and the component parts of the operation device in the disassembled state with respect to one Embodiment of this invention. It is a perspective view which shows the operation device in an enlarged manner. A state in which the telescopic lock mechanism is locked is shown, (A) is a vertical sectional view of the whole, and (B) is a sectional view taken along line AA. An enlarged view of the locked state is shown, (A) is a cross-sectional view showing a safe operating means provided in a manual operation unit of the operating body, and (B) is a cross-sectional view showing a locking means provided in the lower end portion of the operating body. Is. The state in which the telescopic lock mechanism is unlocked is shown, (A) is a vertical cross-sectional view of the entire body, (B) is a cross-sectional view provided on the manual operation unit of the operating body and shows a safe operating means, and (C) is a sectional view of the operating body. It is sectional drawing which shows the locking means provided in the lower end part.

A typical embodiment of the present invention will be described in detail below with reference to the drawings.

(Expandable leg device)
The telescopic leg device provides a pedestal 30 of an aerial work platform such as a stepladder similar to the pedestal 1c shown in FIGS. 1 and 2, and is slidably fitted into the main leg 31 and the main leg 31. It is composed of the telescopic legs 32, and the crosspiece member 34a is fixed to the position near the lower end of the main leg 31 via the bracket 33a, and the tread 34b is fixed to the upper predetermined height position via the bracket 33b. There is.

As shown in the figure, the main landing gear 31 and the telescopic leg 32 are formed of an extruded member such as aluminum, and the main landing gear 31 is composed of a groove-shaped member having a groove-shaped cross section so as to have a groove 35. Is composed of a hollow member that is slidably inserted into the groove 35 of the main landing gear 31.

The telescopic legs 32 are located on the side where the groove 35 of the main landing gear 31 opens, and a large number of rack teeth 36a are provided in the sliding direction of the telescopic legs 32. Specifically, as shown in FIG. 5B, a strip-shaped rack 36 having rack teeth 36a is charged and fixed in the groove-shaped passage of the telescopic legs 32.

Therefore, the telescopic lock mechanism 37 for locking the telescopic legs 32 in a retractable manner is provided with the rack teeth 36a provided on the telescopic legs 32 and the rack teeth 36a at the operating position P1 facing the lower end of the main landing gear 31. It is composed of a locking means 38 provided with locking teeth 38a facing the surface. At this time, the locking means 38 locks the locking teeth 38a to the rack teeth 36a when moving forward as shown by the arrow F1, and locks the locking teeth 38a from the rack teeth 36a when moving backward as shown by the arrow F2. It is configured to leave.

With respect to the operating position P1 which is the low position of the pedestal 30, the operation position P2 is set above the upper end of the telescopic leg 32, and the engagement / disengagement operation of the telescopic lock mechanism 37 can be operated from the operating position P2. An operating device 39 is provided for this purpose.

The operating device 39 is composed of an operating body 40 composed of a long square pipe arranged along the groove 35 of the main landing gear 31, and has an upper end portion facing the operating position P2 from a lower end portion facing the operating position P1. The locking means 38 is provided at the lower end portion, and the manual operation portion 41 is provided at the upper end portion.

The operating body 40 is pivotally supported by a pivot 42 at an intermediate portion in the vertical direction. In the case of the illustrated embodiment, a notch 43 facing the tread 34b is formed in the square pipe forming the operating body 40, and the bracket arm 44 is attached to the operating body 40 via the notch 43, and the bracket arm 44 is pivotally attached to the bracket 33b of the tread 34b via the pivot 42.

Therefore, when the operating body 40 swings by moving the manual operating unit 41 away from the main landing gear 31 (locking direction M1), the locking means 38 is advanced in the F1 direction to lock the telescopic locking mechanism 37. On the contrary, when the manual operation unit 41 is moved in the direction toward the main landing gear 31 (disengagement direction M2) to swing, the locking means 38 is retracted in the F2 direction and the telescopic lock mechanism 37 is unlocked. It is configured.

In the case of the illustrated embodiment, the operation is enabled by axially supporting one operating body 40 with one pivot 42, but the operating body 40 is divided into a plurality of lines and a mutually pivoted link is configured. By doing so, it may be configured to enable the same operation.

The locking means 38 is mounted through a window hole 45 provided at the lower end of the operating body 40, and the locking teeth 38a face the rack 36 of the telescopic legs 32, and the side opposite to the locking teeth 38a. The protrusion 46 provided in the above is projected toward the crosspiece member 34a. A guide shaft portion 47 is projected on both sides of the protrusion 46 by inserting a pin, and the guide shaft portion 47 is inserted into a guide hole 48 provided in the bracket 32a for the crosspiece member 34a. At this time, the guide hole 48 is formed by an elongated hole extending along a locus in which the guide shaft portion 47 moves in an arc when the operating body 40 is swung around the pivot 42 as a fulcrum. As a result, when the operating body 40 is swung, the guide shaft portion 47 is guided to the guide hole 48, so that the locking means 38 is moved back and forth while maintaining the horizontal posture.

Preferably, an urging means 49 for urging the lower end portion of the operating body 40 in the direction F1 for advancing toward the rack 36 of the telescopic legs 32 is provided, and in the case of the illustrated embodiment, the crosspiece member 34a and the bracket 33a are fixed. It is attached by using a shaft member 50 such as a bolt. The urging means 49 is composed of a coil spring or a crane-wound spring, and in the case of the illustrated example, a pair of coil portions externally attached to the shaft member 50 and an attachment extending from one end of both coil portions and connected in a portal shape. A force portion 49a and a bullet support portion 49b extending from the other end are provided, and the bias portion 49a is brought into contact with the lower end portion of the operating body 40 in a state where the bullet support portion is supported by the bracket 33a or the crosspiece member 34a. It is configured.

The manual operation unit 41 provided at the upper end of the operation body 40 is in a state where the operation body 40 is swung in the locking direction M1, that is, the locking teeth 38a of the locking means 38 are engaged with the rack teeth 36a. A safety operating means 51 is provided to prevent the operating body 40 from swinging in the detaching direction M2 in the stopped state.

The safe operating means 51 is composed of an operating lever 53 penetrating through the through window 52 of the operating body 40, and the operating lever 53 has a shaft portion 54 so as to be rotatable inside the through window hole 52. An arm-shaped engaging / disengaging portion 55 extending from the shaft portion 54 toward the facing wall of the main landing gear 31 (in the case of the figure, the bottom wall 35a of the groove portion 35), and the engaging / disengaging portion 55. It includes an operation unit 56 that extends toward the opposite side.

In the illustrated embodiment, when the operating lever 53 is rotated in the counterclockwise direction as shown in FIG. 6 (A), the engaging / disengaging portion 55 is opposed to the bottom wall 35a of the groove portion 35 substantially perpendicularly. The rotation is stopped by contacting and locking the stopper 57 formed at the base of the engaging / disengaging portion 55 with the edge of the through window hole 52. At this time, the engagement / disengagement portion 55 and the operation portion 56 are bent into a substantially “dogleg” shape so that the operation portion 56 is tilted diagonally downward from the shaft portion 54, and the operation lever 53 is formed. A spring 58 is provided to rotate and urge the lever in the counterclockwise direction.

Therefore, the operating lever 53 is urged by the spring 58 so that the engaging / disengaging portion 55 is always attached to the bottom wall 35a with the stopper 57 abutting and locking to the edge of the through window hole 52. The manual operation unit 41 of the operating body 40 is prevented from moving in the detaching direction M2. Therefore, in this state, even when a force in the detaching direction M2 is applied to the manual operation portion 41 of the operating body 40, the engaging / disengaging portion 55 maintains the tension state between the shaft portion 54 and the bottom wall 35a. , The swing in the detachment direction M2 is prevented.

On the other hand, as shown in FIG. 7B, when the operating portion 56 is pressed in the direction of pushing into the through window hole 52 with a fingertip or the like, the operating lever 53 opposes the spring 58 in the direction of the clock hand shown in the drawing. It is rotated, and at the same time, the engaging / disengaging portion 55 is rotated from the facing posture to the deviation posture. As a result, the manual operating portion 41 of the operating body 40 swings in the detaching direction M2. Is allowed. Since the pressing direction of the operation unit 56 by such a fingertip or the like is the same as the detachment direction M2 of the manual operation unit 41, the swing prevention function of the engagement / disengagement unit 55 is released by the one-touch pressing operation. The operating body 40 can be swung in the detaching direction M2 at the same time.

(Action)
5 (A) and 6 (A) and 6 (B) show the locked state of the telescopic lock mechanism 37. In this state, the lower end portion of the operating body 40 is urged in the forward direction F1 by the urging means 49, and by locking the locking teeth 38a of the locking means 38 to the rack teeth 36a, the lower end portion of the operating body 40 is urged with respect to the main landing gear 31. The telescopic landing gear 32 is locked so that it cannot be stretched.

As described above, in the manual operation unit 41 of the operation body 40, the engagement / disengagement portion 55 of the operation lever 53 constituting the safety operation means 51 abuts on the groove bottom wall 35a of the main landing gear 31 in an opposed posture, and moves to the detachment direction M2. The rocking is blocked. Therefore, even if an unintended external force is applied to the operating body 40 during work at a high place, the operating body 40 will not be swung and there is a danger that the locked state of the telescopic lock mechanism 37 will be accidentally released. There is no.

When unlocking the telescopic lock mechanism 37 from this state, the manual operation unit 41 of the operation body 40 arranged at the operation position P2 at the high position may be operated. As shown in FIG. 7, when the operation portion 56 of the operation lever 53 is pressed with a fingertip or the like, the swing prevention function of the engagement / disengagement portion 55 is released and the operation body 40 swings in the detachment direction M2 by a one-touch pressing operation. The movements are simultaneously performed, and the locking means 38 retracts against the urging means 49 as shown by the arrow F2, and the locking teeth 38a are separated from the rack teeth 36a.

As a result, the telescopic landing gear 32 can be expanded and contracted with respect to the main landing gear 31. Therefore, the telescopic legs 32 can be expanded and contracted to an arbitrary length while holding the pressure on the operation portion 56 of the operation lever 53, and then the pressing force on the operation portion 56 is released, and the urging means 49 As a result, the lower end portion of the operating body 40 is automatically returned to the original position while advancing, and the locking tooth 38a is locked to the rack tooth 36a to lock the telescopic locking mechanism 37 again.

At the same time, the operating lever 53 whose pressing force is released is rotated and returned by the spring 58, and as described above, the engaging / disengaging portion 55 comes into contact with the groove bottom wall 35a of the main landing gear 31 in an opposed posture and is released. By preventing the swing in the direction M2, accidental unlocking is prevented.

When the locking means 38 is moved back and forth in the forward direction F1 and the backward direction F2, the guide shaft portion 47 is guided by the guide hole 48 to maintain the horizontal posture, so that the locking teeth 38a and the rack teeth 36a are engaged and disengaged. At that time, distortion such as squeezing does not occur.

As described above, the operating device 39 constitutes a unit in which the bracket arm 44 is attached to the operating body 40, the safe operating means 51 is assembled, and the locking means 38 of the telescopic lock mechanism 37 is further assembled. There is. Therefore, by attaching the unit to the pedestal 30 in the conventional high-altitude work device having the telescopic leg device including the telescopic leg 32 provided with the rack 36 and the main landing gear 31, the telescopic lock mechanism 37 and the operating device Since 39 can be provided, there is an advantage that the versatility is high.

1a 1st main leg 1b 2nd main leg 1c pedestal 2 opening stopper 3 top plate 4a crosspiece member 4b tread rail 5 main leg 6 telescopic leg 7 rack 7a rack tooth 8 fixing part 9 telescopic lock mechanism 10a, 10b bracket 11 guide Cylinder 12 Rib 13 Pivot 14 Locking lever 15 Spring 16 Locking tooth 17 Tail 18 Bouncer 19 Bullet support 20 Receiving surface 30 Leg pillar 31 Main leg 32 Telescopic legs 33a, 33b Bracket 34a Rail member 34b Step 35 Groove 35a Bottom Wall 36 Rack 36a Rack teeth 37 Telescopic lock mechanism 38 Locking means 38a Locking teeth 39 Operating device 40 Operating body 41 Manual operating unit 42 Axis 43 Notch 44 Bracket arm 45 Window hole 46 Protrusion 47 Guide shaft 48 Guide hole 49 Biasing means 49a Biasing part 49b Bullet support part 50 Shaft member 51 Safe operating means 52 Through window 53 Operating lever 54 Shaft part 55 Engagement / disengagement part 56 Operating part 57 Stopper 58 Spring

Claims (4)

A telescopic leg device in which a slidable telescopic leg is fitted into the main landing gear of a high-place work device is provided with a telescopic lock mechanism and an operating device for operating the telescopic lock mechanism.
The telescopic lock mechanism (37) has a large number of rack teeth (36a) provided in the sliding direction of the telescopic leg (32) and an operating position (P1) facing the lower end of the main leg (31). It consists of a locking means (38) provided with locking teeth (38a) facing the rack teeth, and when the locking means is advanced, the locking teeth are locked to the rack teeth, and when the locking teeth are retracted, the locking teeth are locked. Is configured to separate from the rack teeth,
The operating device (39) is arranged along the main landing gear and includes an upper end portion facing the operating position (P2) above the upper end of the telescopic leg from the lower end portion facing the operating position (P1). It is composed of an operating body (40), the locking means (38) is provided at the lower end portion, and the manual operating portion (41) is provided at the upper end portion.
The operating body (40) is oscillatingly supported via a pivot (42), and swings in the locking direction with the direction in which the manual operating unit (41) separates from the main landing gear as the locking direction (M1). When the lock means is moved forward to lock the telescopic lock mechanism, and when the manual operation unit (41) swings in the release direction with the direction toward the main landing gear as the release direction (M2), the lock An operating device for a telescopic lock mechanism in a telescopic landing gear that is configured to unlock the telescopic lock mechanism by retracting the means. The operating device for the telescopic lock mechanism in the telescopic leg device according to claim 1, further comprising an urging means (49) for urging the operating body (40) in the locking direction. The manual operation unit (41) is provided with a safety operation means (51) that engages and disengages the main landing gear at a position where the operation body (40) is swung in the locking direction (M1). The operating device for the telescopic lock mechanism in the telescopic landing gear device according to claim 1 or 2. The safety operating means (51) is provided with an operating lever (53) rotatably attached to the upper end of the operating body (40) via a shaft portion (54). The engaging / disengaging portion (55) extending from the shaft portion (54) toward the facing wall (35a) of the main landing gear and the operating portion (56) extending on the opposite side of the engaging / disengaging portion are provided. ) Is provided with a spring (58) for rotating and urging the operation lever so as to face the facing wall (35a).
By contacting the engaging / disengaging portion (55) with the facing wall (35a) of the main leg in an opposed posture, the operating body is prevented from swinging in the detaching direction (M2), and the operating portion (56) is used to prevent the operating body from swinging. 3. The third aspect of the present invention is that the engaging / disengaging portion (55) is configured to allow swinging of the operating body in the detaching direction (M2) by rotating the engaging / disengaging portion (55) from the facing posture to the deviation posture. The operating device of the telescopic lock mechanism in the telescopic leg device according to the above.

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