JP2013234553A - Elevating scaffold device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely perform brake release operation for lowering a scaffold part.SOLUTION: An elevating scaffold device includes: an elevation part 10 which is installed along a first tower 1 so as to freely rise and fall; a first motor 11 which has a drive mechanism giving a rotational driving force for raising and lowering the elevation part 10 to the elevation part 10 by receiving supply of a power supply voltage, a brake mechanism maintaining rotation by the drive mechanism at a stopped state by stopping the supply of the power supply voltage, and a brake release mechanism for releasing the rotation-stopped state; and a scaffold part 3 which rises and falls in accordance with the rising and falling of the elevation part 10. The elevating scaffold device further includes: an operating lever 32 which is displaceable in a predetermined direction by the operation of a worker; first and second connecting means 33, 34 which are connected to the operating lever 32 and displaceable by the displacement of the operating lever 32; and a first U-shaped member 35 which is connected to these connecting means 33, 34 and acts on the brake mechanism with the displacement of these connecting means 33, 34 to release the rotation-stopped state by the brake mechanism.

Description

  The present invention relates to a lifting and lowering scaffold device that can be used for a temporary scaffolding laid in, for example, a building such as a building, and in particular, a work floor can be moved up and down.

  Conventionally, a temporary scaffold is provided along a building in, for example, a building such as a building, and has a work floor for an operator to perform work. In recent years, an elevating type scaffolding device in which a work floor can be moved up and down in the vertical direction has been proposed (see, for example, Patent Document 1).

Japanese Patent No. 2881677

  Among the above-mentioned lifting-type scaffolding devices, for example, there are two towers, and a scaffolding part having a work floor is connected between these towers, and this scaffolding part moves up and down while maintaining a horizontal state. ing. That is, this lifting type scaffolding device includes, for example, two towers arranged side by side at a predetermined interval on the ground where the building is erected, and each has a lifting unit that can be moved up and down along each tower. It has been. And the scaffold part is connected between both raising / lowering parts.

  Each lifting part is lifted and lowered, for example, by rotationally driving a motor, and each lifting part is lifted and lowered at the same timing, so that the scaffold part is raised and lowered while maintaining almost horizontal. Then, when the scaffold portion is raised to a predetermined height position and stopped, the worker who is on the scaffold portion can perform the height work as it is at the predetermined height position.

  In the lifting / lowering scaffold device, a power supply voltage (for example, AC 200V) is supplied to a motor for moving the scaffolding portion up and down. In this lifting and lowering scaffold device, a power supply cable for supplying a power supply voltage to the motor is laid in a so-called basket system.

  That is, the power supply cable is housed in a basket provided on the ground, for example, in a state of being wound around, and one end of the power supply cable is raised from the basket and connected to the control panel via the air. Then, a power cable is separately laid from the control panel to the motor provided in the elevating unit, whereby a power supply voltage is supplied. Therefore, the power supply cable stored in the basket is pulled out of the basket when the lifting unit is raised, and is dropped and stored in the basket by its own weight when the lifting unit is lowered.

  However, the power supply cable may come into contact with the upper end of the basket, for example, when the scaffolding portion is raised, or may be caught by wind or the like and caught on the housing portion of the lifting / lowering scaffolding device. Therefore, tension is applied to the power supply cable, and the power supply cable may be disconnected.

  When the power supply cable is disconnected, the power supply voltage is not supplied to the motor. In such a case, since the motor is usually provided with a brake mechanism that automatically stops its rotation, the scaffold portion remains stopped at its height position. Therefore, the worker who has been on the scaffold cannot lower the scaffold by driving the motor, and it is difficult to get down to the ground.

  Therefore, for example, it is conceivable to release the rotation scaffolding device by releasing the rotation stop state by the brake mechanism of the motor (hereinafter, releasing the rotation stop state by the brake mechanism is referred to as “releasing the brake”). That is, the motor is provided with a mechanism for manually releasing the brake when the rotation is stopped by the brake mechanism. Specifically, for example, a rotatable knob piece is provided on the outer surface of the motor, and the brake of the motor can be released by rotating the knob piece by a predetermined angle. Therefore, as described above, when the power supply cable is disconnected and the scaffold portion stops at the height position as it is, the brake of the motor is released and the scaffold portion is lowered.

  However, the motor is usually attached to a place that is difficult for the operator to operate, such as below the work floor of the scaffold. Also, when the knob piece is manually rotated, the scaffolding part will continue to descend if it is left as it is, so in order to safely lower the scaffolding part so that it does not collide with the ground, It was necessary to appropriately and repeatedly perform operations such as turning and then returning. As described above, in the conventional lifting and lowering scaffold device, when the knob piece for releasing the brake is rotated, the operability and workability are not always good.

  The present invention has been conceived under the circumstances described above, and provides an elevating scaffold device capable of easily and reliably performing a brake releasing operation for lowering the scaffold portion. Let that be the issue.

  The lifting and lowering scaffold device provided by the present invention includes a tower portion extending in the vertical direction, a lifting and lowering portion provided so as to be movable up and down along the tower portion, and a lifting and lowering of the lifting portion by being supplied with a power supply voltage. A driving mechanism for applying a rotational driving force to the elevating unit, a brake mechanism for maintaining rotation by the driving mechanism by stopping supply of the power supply voltage, and a rotation stopping state by the brake mechanism A lifting and lowering scaffolding device comprising: a motor having a brake releasing mechanism for releasing the lifting mechanism; and a scaffolding portion provided in a lateral direction of the lifting and lowering unit and moving up and down as the lifting and lowering unit moves up and down. An operation means that can be displaced in a predetermined direction by an operation by an operator, and a displacement that is connected to the operation means and that is displaceable in substantially the same direction as the operation means is displaced And link means is characterized by comprising a releasing means for releasing the rotation stop state by the brake mechanism acts on the brake release mechanism by said link means is connected is displaced to the link means.

  In the lifting and lowering scaffold device of the present invention, the brake release mechanism is provided on a circumferential surface of the motor, and is configured by a knob piece that releases a rotation stop state by the brake mechanism by being rotated by a predetermined angle. The releasing means is constituted by a plate member having at least a predetermined length, and one end portion of the plate member is rotatably connected to the link member, while the other end portion is connected to the knob piece, and the link means It is preferable to turn the knob piece by converting a linear motion due to the displacement into a rotational motion.

  In the lifting and lowering scaffold apparatus according to the present invention, the operation means may be constituted by a long member, and may be rotatably supported at one end of the long member at a position near the motor.

  In the lifting and lowering scaffold device according to the present invention, the long member is composed of a long arm part and a cylindrical grip part provided in the arm part so as to be movable forward and backward. It is good to have a latching means which latches in the state which advanced the grip part.

  The lifting and lowering scaffold apparatus according to the present invention further includes an urging unit that urges the operation unit in a direction opposite to the predetermined direction, and the urging unit is not operated by an operator after the operation unit is rotated. And it is good to act so that it may return to the state before operation of the operation means.

  According to the present invention, when the operating means is displaced in a predetermined direction by the operator, the link means is displaced in substantially the same direction, whereby the releasing means acts on the brake releasing mechanism provided in the motor, and the motor The rotation stop state by the brake mechanism provided in is released. Therefore, the releasing operation of the brake mechanism of the motor for lowering the scaffold portion can be performed by an easy operation by the operator. Moreover, according to the operation means, the brake mechanism can be released by a simple operation such as simply displacing in a predetermined direction, so that the scaffold portion can be lowered reliably and safely.

It is a front view which shows the raising / lowering scaffold apparatus which concerns on this invention. The arrangement | positioning relationship of a 1st motor and a 2nd motor, and a pinion is shown, (a) is a side view, (b) is a rear view. It is a perspective view which shows the structure of a brake release mechanism. It is a perspective view of a knob piece, (a) shows a normal state, (b) shows a state when it is rotated. It is a disassembled perspective view of a brake release mechanism. It is a fragmentary perspective view of an operation lever, and shows the state where the lower end part of a grip part is inserted in the upper end part of an arm part. It is a fragmentary perspective view which shows the connection state of a 1st U-shaped member and a knob piece. It is a figure for demonstrating the effect | action of a brake release mechanism, and shows a normal state. It is a figure for demonstrating the effect | action of a brake release mechanism, and shows a state when an operation lever is operated.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

  FIG. 1 is a front view showing an elevating scaffold device (hereinafter simply referred to as “scaffold device”) according to the present invention. This scaffold device is used for, for example, a temporary scaffold for construction work, and is particularly a lifting type in which a work floor is raised and lowered.

  As shown in FIG. 1, the scaffold device includes two towers. The scaffold device includes a first tower 1 having a predetermined height, a second tower 2 arranged in parallel at a predetermined interval, and a scaffold unit 3 that can be moved up and down supported by both towers 1 and 2. I have. The first tower 1 and the second tower 2 have substantially the same configuration. In the following description, members having the same configuration are denoted by the same reference numerals.

  The first and second towers 1 and 2 have base portions 4 for supporting them with respect to the ground G, respectively. The base part 4 is formed in a substantially flat plate shape, and a plurality of jack mechanisms 5 are provided at corners of the base part 4. The jack mechanism 5 maintains the base part 4 in a horizontal state by adjusting the respective heights.

  The first and second towers 1 and 2 are configured such that a plurality of frame-like members 7 whose outer shapes are formed in a substantially rectangular parallelepiped frame shape are connected. Specifically, in the first and second towers 1 and 2, the lowermost frame-like member 7 is attached at the center of the base portion 4, and another frame-like member 7 is stacked above the frame-like member 7. Configured.

  A rack 8 extending in the vertical direction is provided in the internal space of each frame-like member 7 of the first tower 1. The rack 8 is formed in a long shape, and as shown in FIG. 2 (b), a meshing portion 8a is formed on one end face thereof so that a plurality of pinions 9 are engaged. Similarly, a rack 8 extending in the vertical direction is provided in the internal space of each frame-like member 7 of the second tower 2. The pinion 9 is provided on each of rotation shafts 11a and 12a of first and second motors 11 and 12, which will be described later. In FIG. 2, a brake release mechanism 30 described later is omitted.

  The 1st tower 1 is provided with the raising / lowering part 10 which can be raised / lowered up and down along it. The raising / lowering part 10 is formed in the substantially rectangular parallelepiped frame shape extended in the height direction. The elevating part 10 is raised and lowered along the outer surface of the frame-like member 7 via a guide roller (not shown). On the other hand, the second tower 2 is also provided with an elevating unit 10 that can be moved up and down along the second tower 2.

  As shown in FIGS. 1 to 3, a first motor 11 and a second motor 12 for raising and lowering the elevator 10 are attached to the elevator 10 side by side with respect to the gantry 10 a. The first and second motors 11 and 12 are both induction motors and can be rotated by supplying a power supply voltage (for example, AC 200V). As described above, the provision of the two motors allows the other motor to be used when one of the motors breaks down, thereby ensuring safety in an emergency.

  The first and second motors 11 and 12 are each provided with a brake mechanism that maintains its rotation stopped when the supply of the power supply voltage is interrupted. The first and second motors 11 and 12 are provided with a mechanism for releasing the rotation stop state by the brake mechanism, that is, releasing the brake. For example, the circumferential surface of the first motor 11 is provided with a pair of knob pieces 11b protruding from the circumferential surface as shown in FIG. Each knob piece 11b is formed in a cylindrical shape having a groove 11c. By rotating these knob pieces 11b by a predetermined angle (see FIG. 4B), the brake of the first motor 11 is released. A similar pair of knob pieces 12b is also provided on the circumferential surface of the second motor 12 (see FIG. 3).

  The scaffold device is provided with a brake release mechanism 30 that can easily and reliably release the brakes of the first and second motors 11 and 12. Details of the brake release mechanism 30 will be described later.

  The elevating unit 10 is provided with a horizontal moving unit 13 which is disposed so as to cover it and can move horizontally in the front-rear direction (before or in the depth direction in FIG. 1). The horizontal movement part 13 is formed in a substantially rectangular parallelepiped frame shape extending in the front-rear direction. The horizontal moving unit 13 is moved up and down as the lifting unit 10 moves up and down.

  The scaffold part 3 includes an intermediate scaffold part 14 provided between the horizontal movement parts 13 of the first and second towers 1 and 2, and a left side extending in the left direction of the horizontal movement part 13 of the first tower 1. The scaffold portion 15 and the right scaffold portion 16 extending in the right direction of the horizontal moving portion 13 of the second tower 2 are configured. The left scaffolding portion 15 is provided with a leftward advancement / retraction portion 17 that can be advanced and retracted in the left direction. The right scaffolding portion 16 is provided with a rightward advancement / retraction portion 18 that is allowed to advance and retract in the right direction. (FIG. 1 shows a state in which the leftward advance / retreat portion 17 and the rightward advance / retreat portion 18 have advanced).

  Further, the left scaffolding part 15 is rotatable in a fan shape in plan view with the horizontal movement part 13 of the first tower 1 as the center. Further, the right scaffolding portion 16 is rotatable in a fan shape around the horizontal moving portion 13 of the second tower 2.

  The first and second towers 1 and 2 are each provided with a supporting mechanism 19 for supporting and supporting the intermediate scaffold part 14, the left scaffold part 15, and the right scaffold part 16 of the scaffold part 3. The left scaffold portion 15 and the right scaffold portion 16 are respectively supported by the respective supporting mechanisms 19 when they are turned.

  By the said structure, when both the raising / lowering part 10 of the 1st and 2nd towers 1 and 2 raises / lowers, both the horizontal moving parts 13 are raised / lowered, As a result, the scaffold part 3 also raises / lowers. Further, when both the horizontal moving parts 13 are moved in the front-rear direction, the scaffold part 3 is also moved in the front-rear direction.

  In addition, although the scaffold part 3 is classified into the structure of the intermediate | middle scaffold part 14, the left side scaffold part 15, and the right side scaffold part 16 by the difference in an installation site | part, as a common member structure, it forms in the frame shape of a substantially rectangular parallelepiped. A plurality of frame members, a work floor (not shown) which is disposed on the upper surface of each frame member and serves as a stepping floor for the worker, and a plurality of frame members standing on each frame member to prevent the operator from falling And a handrail 20.

  In this scaffold device, an inspection door (not shown) is formed on the upper work floor where the first and second motors 11 and 12 are arranged, and the inspection door is removed as necessary. The second motors 11 and 12 can face the work floor. That is, when using the brake release mechanism 30 of this embodiment, the operator can remove the inspection door and perform the work of releasing the brake.

  The handrail 20 of the intermediate scaffold section 14 includes a first control panel 21 for controlling the first and second motors 11 and 12 of the first tower 1, and the first and second motors 11 and 12 of the second tower 2. And a second control panel 22 for controlling 12 and the like.

  The scaffold device is provided with a power supply cable 23 for supplying a power supply voltage from ground equipment (not shown) to the first control panel 21 (see FIG. 1). The power supply cable 23 is housed in the basket 24 on the ground, and one end of the power supply cable 23 rises from the basket 24 in the air and is disposed in the intermediate scaffold portion 14 via a clamp (not shown) or the like provided in the first tower 1. It is connected to the control panel 21.

  In the intermediate scaffold portion 14, a transition power supply cable 25 for supplying a power supply voltage from the first control panel 21 to the second control panel 22 is laid. Although not shown in the drawings, in this scaffold apparatus, a cable for supplying a power supply voltage from the first control panel 21 to the first and second motors 11 and 12 of the first tower 1 is laid. A cable for supplying a power supply voltage from the second control panel 22 to the first and second motors 11 and 12 of the second tower 2 is laid.

  Here, the brake release mechanism 30 which is a characteristic part of this embodiment will be described.

  The brake release mechanism 30 is for releasing the brakes of the first and second motors 11 and 12. That is, for example, if the power supply cable 23 is disconnected for some reason while the scaffold unit 3 is lifted or lowered, the power source voltage is not supplied to the first and second motors 11 and 12, so that the scaffold unit 3 is connected to the first and second motors 11. , 12 stops at a certain height position. In such a case, it is necessary for the operator to release the brakes of the first and second motors 11 and 12 in order to lower the scaffold part 3. The brake release mechanism 30 can easily release the brakes of the first and second motors 11 and 12 to reliably lower the scaffold part 3.

  As shown in FIGS. 3 and 5, the brake release mechanism 30 includes a support body 31 provided in the vicinity of the first and second motors 11, 12, an operation lever 32 operated by an operator, and an operation lever 32. The first connecting member 33 connected to the first connecting member 33, the second connecting member 34 connected to the first connecting member 33, the first U-shaped member 35 and the second U-shaped connected to the second connecting member 34, respectively. The member 36 is generally constituted.

  The support body 31 is formed in a substantially T-shape, has a long horizontal portion 37 extending in the horizontal direction, and a base end side of the support body 31 is attached to a gantry 10a to which the first and second motors 11 and 12 are attached. It is fixed. At the center of the horizontal portion 37, there is a vertical portion 38 extending downward from a portion near the tip. A hook 39 for hooking one end of an elastic member 45 (described later) is formed at the tip of the horizontal portion 37. Further, a frame 40 for guiding and supporting the operation lever 32 is provided on the upper surface near the center of the horizontal portion 37.

  The operating lever 32 is long and includes a rod-shaped arm portion 41 and a grip portion 42 that can be moved forward and backward with respect to the arm portion 41. The arm portion 41 is formed in a flat plate shape on the lower side, and is formed in a cylindrical shape on the upper side. The lower end of the arm portion 41 is supported at the lower end of the vertical portion 38 of the support body 31 so as to be rotatable in the front-rear direction. The arm portion 41 is formed with a hook 43 for hooking the other end of an elastic member 45 (described later) at the center thereof.

  As shown in FIG. 6, the arm portion 41 is formed with a pair of guide holes 44 for guiding a latch pin 42 a (described later) of the grip portion 42 in the upper cylindrical portion. The guide holes 44 are formed so as to face the inner peripheral surface of the arm portion 41, respectively. A straight portion 44a extending in the longitudinal direction and a tenon 44b extending in an approximately L shape at the upper end thereof are respectively provided. Have.

  On the other hand, the grip part 42 is a member for an operator to directly operate, and is made of a cylindrical member having an open lower end. As shown in FIG. 6, the grip portion 42 is formed with a latch pin 42 a that connects opposing inner surfaces near the lower end in the horizontal direction. The grip portion 42 is fitted and inserted into the cylindrical portion of the arm portion 41 in the stored state, and the latching pin 42 a is loosely fitted in the guide hole 44 of the arm portion 41.

  The grip portion 42 can be moved back and forth with respect to the arm portion 41. That is, when the grip portion 42 is extended, the grip portion 42 moves upward, and the grip portion 42 is rotated from the advanced state, thereby the latch pin 42a. Is moved and latched to the tenon 44b of the cylindrical portion, the advancing state of the grip portion 42 is maintained.

  The operation lever 32 can be rotated in the front-rear direction, but the rotation angle in the front-rear direction is defined by the frame 40 of the support body 31. An elastic member 45 is stretched over the hook 43 of the operation lever 32 and the hook 39 of the support body 31. The elastic member 45 urges the operation lever 32 forward. Therefore, when the operation lever 32 is tilted rearward and the operator then releases the operation lever 32, the operation lever 32 returns to the front side (initial position) by the elastic force of the elastic member 45.

  The first connecting member 33 is a flat plate member whose both ends are formed in a semicircular shape, and connects the arm portion 41 and the second connecting member 34. That is, one end portion of the first connecting member 33 is rotatably supported by the central portion of the arm portion 41, and the other end portion of the first connecting member 33 rotates to the central portion of the second connecting member 34. It is supported freely.

  The second connecting member 34 connects the first connecting member 33 and the first and second U-shaped members 35 and 36. The second connecting member 34 includes a long flat plate member 34a, an upper connection piece 34b extending at the upper end thereof, and a lower connection piece 34c extending at the lower end thereof. The upper connection piece 34b is attached to the flat plate member 34a at an obtuse angle (for example, 126 °) in a sectional view. The lower connection piece 34c is attached to the flat plate member 34a at an acute angle (for example, 54 °) in a cross-sectional view and parallel to the upper connection piece 34b. A first U-shaped member 35 is connected to the upper connecting piece 34b, and a second U-shaped member 36 is connected to the lower connecting piece 34c.

  The first U-shaped member 35 is formed in a substantially U shape in cross-sectional view, and has a long flat plate member 35a and a pair of side pieces 35b extending in the orthogonal direction from both ends of the flat plate member 35a. doing. The side piece 35b corresponds to a “plate member” recited in the claims. The dimension in the longitudinal direction of the flat plate member 35 a is slightly longer than the diameter of the first motor 11. That is, the first U-shaped member 35 is coupled to the first motor 11 so as to be along the circumferential direction of the first motor 11.

  More specifically, as shown in FIG. 7, a protruding portion 35c is formed at the tip of one side piece 35b of the first U-shaped member 35, for example, and this protruding portion 35c is shown in FIG. It is inserted into the groove 11c of the tab piece 11b. A split pin 35d is passed through the protruding portion 35c to prevent the side piece 35a from coming off. The other side piece 35b of the first U-shaped member 35 is connected to the other knob piece 11b of the first motor 11 with the same configuration as the one side piece 35b.

  The second U-shaped member 36 has the same configuration as the first U-shaped member 35, and includes a flat plate member 36a and a pair of side pieces 36b extending in the orthogonal direction from both ends of the flat plate member 36a. Yes. Further, both side pieces 36 b of the second U-shaped member 36 are connected to both knob pieces 12 b of the second motor 12 with the same configuration as the both side pieces 35 a of the first U-shaped member 35.

  The above-described second connecting member 34 is connected to the first U-shaped member 35 by joining the upper connecting piece 34 b to one side piece 35 b of the first U-shaped member 35. More specifically, the upper connection piece 34b is one side piece 35b and is rotatably joined to the vicinity of a bent portion with the flat plate member 35a. That is, the upper connecting piece 34b of the second connecting member 34 is joined to the base end side of the one side piece 35b, and the knob piece 11b of the first motor 11 is connected to the distal end side of the one side piece 35b. .

  Similarly, the lower connecting piece 34c of the second connecting member 34 is joined to one side piece 36b of the second U-shaped member 36 with the same configuration as the upper connecting piece 34b. That is, the lower connecting piece 34c of the second connecting member 34 is joined to the base end side of the one side piece 36b, and the knob piece 12b of the second motor 12 is connected to the distal end side of the one side piece 36b. .

  As illustrated in FIG. 3, a first stopper 47 is provided between the first motor 11 and the first U-shaped member 35, and between the second motor 12 and the second U-shaped member 36. Second stoppers 48 are respectively provided. The first and second stoppers 47 and 48 serve as operation receivers for the first and second U-shaped members 35 and 36, and both are formed in a substantially L shape in a sectional view.

  Next, the operation of the brake release mechanism 30 will be described.

  When the power supply cable 23 is hooked on the housing portion or the like of the scaffolding device while the scaffolding device is lifted up and down, tension is applied to the power supply cable 23 and the power supply cable 23 is disconnected. The power supply voltage is not supplied to. Since the first and second motors 11 and 12 are provided with a brake mechanism, the scaffold unit 3 remains stopped at a height position when the power supply cable 23 is disconnected. In the present embodiment, in such a case, an operator who has been on the scaffold unit 3 can manually lower the scaffold unit 3 by the brake release mechanism 30 and can surely descend the ground. ing.

  That is, the operator removes the inspection door of the scaffold part 3 and makes the brake release mechanism 30 operable from the upper surface of the scaffold part 3. Specifically, the operator pulls the grip portion 42 of the operation lever 32 upward and rotates it counterclockwise at the stop position. That is, the grip part 42 is extended from the arm part 41, and the latch pin 42a of the grip part 42 is latched by the tenon 44b. Thereby, the operation lever 32 is maintained in a state extending to a predetermined length.

  Next, the operator tilts the operation lever 32 backward as shown in FIG. 9 from the initial (normal) state shown in FIG. 8 (see white arrow A). That is, when the operation lever 32 is displaced rearward, the first connection member 33 connected to the operation lever 32 is displaced rearward, and accordingly, the second connection member 34 is also moved rearward while extending in the vertical direction. Displace. When the second connecting member 34 is displaced, the first U-shaped member 35 is tilted rearward (see the white arrow B), and the second U-shaped member 36 is also tilted rearward (see the white arrow C).

  When the first U-shaped member 35 is tilted rearward, both knobs 11b of the first motor 11 are rotated. Accordingly, the brake of the first motor 11 is released. When the second U-shaped member 36 is also tilted rearward, both knobs 12b of the second motor 12 are rotated. Accordingly, the brake of the second motor 12 is released. That is, the first and second U-shaped members 35 and 36 have a function of converting linear motion into rotational motion. When the brakes of the first and second motors 11 and 12 are released, the scaffold part 3 starts to descend because there is nothing to maintain the height position.

  Since the operation lever 32 is biased forward by the elastic member 45, when the operator releases the operation lever 32, the operation lever 32 returns to the original initial position (see FIG. 8). Therefore, the first and second connecting members 33 and 34 and the first and second U-shaped members 35 and 36 also return to the initial state, and the knobs 11b and 12b of the first and second motors 11 and 12 are also in the initial positions. Return to. Therefore, the brake mechanism works again in the first and second motors 11 and 12, and the lowering of the scaffold part 3 is stopped.

  As described above, in the present embodiment, the brakes of the first and second motors 11 and 12 can be easily released simply by tilting (displacement) the operation lever 32 backward. Therefore, the brake releasing operation of the first and second motors 11 and 12 for lowering the scaffold part 3 can be performed by an easy operation by an operator. Therefore, even when the scaffold part 3 stops at the height position due to disconnection of the power supply cable 23 or the like, the scaffold part 3 can be surely lowered without driving the first and second motors 11 and 12.

  In the present embodiment, by rotating the operation lever 32 in the extended state, compared to the case where the knob pieces 11b and 11c of the first and second motors 11 and 12 are directly rotated by hand, for example, one finger Since the knob pieces 11b and 11c can be rotated with a small force by the book, handling of the knob pieces 11b and 11c becomes much easier.

  In this embodiment, since the operation lever 32 can be extended, if the operator removes the inspection door on the work floor, the grip portion 42 of the operation lever 32 can be positioned near the work floor. It is. Therefore, for example, the operator does not reach out to the knob pieces 11b and 12b of the first and second motors 11 and 12 while being hungry on the work floor, and the first and second motors 11 and 11 can be easily operated. Twelve brakes can be released.

  Moreover, in order to descend the scaffold part 3 safely, it is necessary to repeatedly release the brake and then brake. In the present embodiment, the operation lever 32 acts so as to always return to the initial state due to the biasing effect of the elastic member 45, that is, the brake is released unless the operator positively tilts the operation lever 32. Absent. Therefore, the operator can repeatedly release and brake the brake by a simple operation such as tilting the operation lever 32 and then releasing it. Therefore, the scaffold part 3 does not continue to fall down without permission, and the scaffold part 3 can be lowered safely.

  The scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, the number, form, configuration and the like of the members constituting the brake release mechanism 30 in the above embodiment are not limited to those in the above embodiment.

  The configurations of the first and second towers 1 and 2, the scaffold unit 3, the elevating unit 10, and the first and second motors 11 and 12 can be appropriately changed in design. For example, in the above embodiment, the two towers 1 and 2 are provided, but the lifting and lowering scaffolding device may be configured by one or three or more towers. In the above embodiment, the two motors 11 and 12 are provided, but one or three or more motors may be provided.

DESCRIPTION OF SYMBOLS 1 1st tower 2 2nd tower 3 Scaffolding part 10 Lifting part 11 1st motor 11b Knob piece (of 1st motor)
12 Second motor 12b Knob piece (of the second motor)
23 power supply cable 30 brake release mechanism 31 support body 32 operation lever 33 first connecting member 34 second connecting member 34b upper connecting piece 34c lower connecting piece 35 first U-shaped member 35b side piece (first U-shaped member of)
36 2nd U-shaped member 36b Side piece (of 2nd U-shaped member)
41 Arm part 42 Grip part 45 Elastic member

Claims (5)

A tower portion extending vertically, and
An elevating part provided so as to be movable up and down along the tower part;
A drive mechanism that applies a rotational driving force for raising and lowering the elevating part when the power supply voltage is supplied to the elevating part, and the rotation by the drive mechanism is stopped when the supply of the power supply voltage is stopped A motor having a brake mechanism for maintaining, and a brake release mechanism for releasing a rotation stop state by the brake mechanism;
A lifting and lowering scaffolding device provided with a scaffolding part that is provided in a lateral direction of the lifting and lowering part as the lifting and lowering part moves up and down
Operation means that can be displaced in a predetermined direction by an operation by an operator;
Link means connected to the operating means and displaceable in substantially the same direction as the displacement direction when the operating means is displaced;
Release means connected to the link means and acting on the brake release mechanism when the link means is displaced to release the rotation stop state by the brake mechanism;
A lifting and lowering scaffold device comprising: The brake release mechanism is provided on a circumferential surface of the motor, and is configured by a knob piece that releases a rotation stop state by the brake mechanism by rotating a predetermined angle.
The release means is constituted by a plate member having at least a predetermined length, and one end portion of the plate member is rotatably connected to the link member, while the other end portion is connected to the knob piece,
The lifting and lowering scaffold device according to claim 1, wherein the knob piece is rotated by converting a linear motion due to the displacement of the link means into a rotational motion. The operation means is constituted by a long member,
The elevating type scaffolding device according to claim 1 or 2, which is rotatably supported at one end of the elongated member at a position near the motor. The long member is composed of a long arm part and a cylindrical grip part provided in the arm part so as to be able to advance and retreat.
The elevating type scaffolding device according to claim 3, wherein the arm portion includes a hooking means for hooking the grip portion when the grip portion is advanced. Urging means for urging the operating means in a direction opposite to the predetermined direction;
5. The lifting type according to claim 1, wherein the urging unit acts to return to a state before the operation of the operation unit when the operation unit is rotated and is not operated by an operator thereafter. Scaffolding device.

Images