JP2554421Y2 - Lifting equipment for construction work - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a carrier equipment for a construction elevator, which is provided with a step plate which can be automatically raised and lowered in conjunction with the movement of a handrail attached to the carrier equipment and opened and closed. About.

[0002]

2. Description of the Related Art Conventionally, a lift in a construction site, such as a lift, an elevator, or the like, which is used at a construction site, is placed on a required floor, and is then moved between a carrier bed side and a work floor on the work floor. In order to cover the generated gap temporarily and to allow people to get on and off and to load and unload equipment and the like safely, a tread is attached to the elevator and the tread is passed from the transporter side to the work floor. About such a structure, for example,
These are known from JP-A-6-29350 and JP-B-54-19026.

[0003] In the apparatus disclosed in Japanese Utility Model Publication No. 56-29350, a handrail is provided on the carrier so as to be vertically slidable, and one end is pivotally supported by a side edge of the carrier to be vertically pivotable. When a footboard operating leg piece that is turned downward by its own weight and spans between the loading platform and the work floor on the building side and is provided at the lower end of the handrail to project downward is located on the loading platform. Is designed so that the tread plate is kept in an upright state, and when the handrail is raised, the tread plate is cut off from contact with the pivot-side end of the tread plate and the tread plate falls down. One roller is attached to one end of the tread plate operating leg, and the roller rolls when contacting the tread plate so that the tread plate can be turned upside down.

[0004]

In the prior art as described above, in the configuration for attaching the loading platform to the lifting and lowering of the handrail and for raising and lowering the tread, it is provided at the lower end of the handrail. Since only one roller is attached to one end of the tread plate operating leg, in such an elevator, if the landing is repeatedly repeated, the handrail is opened and closed each time. Then the treadle is also turned upside down. As shown in FIG. 7, the roller 5 attached to the lower end of the tread plate operation leg 4 pivots the base of the bed 1 by the bracket 6 on the outer surface of the beam member 2 of the bed 1 and in front thereof. The tread plate 8 is inserted between the tread plate 8 and the surface of the tread plate 8 pivotally supported by the attachment pins 7 to erect the tread plate 8. When the handrail 3 rises, the roller 5 of the tread plate operation leg piece 4 rises above the pivot point of the tread plate 8. As shown by the two-dot chain line a, the tread plate 8 repeats the operation of tilting toward the work floor side and gradually falling down as shown by the two-dot chain line a.

The handrail 3 is guided up and down by guide rails (not shown) provided on both sides at both ends. The guide rail and the handrail end have a combined structure having relatively large play. Therefore, the roller 5 is pushed toward the beam member 2 side of the carrier 1 by the reaction force against the roller 5 caused by the rotation of the tread plate 8. Then, although the roller 5 is in contact with the surface of the tread plate 8 and is in contact with the beam member 2 in spite of rolling, the roller 5 cannot perform a smooth rotation and has a wedge-like action. Become. Therefore, the roller 5 moves by rubbing the outer surface of the beam member 2. In particular, the steps 5
The horizontal acting force on the roller 5 is large between the time when the user intends to stand up and the position indicated by a in the drawing, so that the upper part of the outer side surface of the beam member 2 of the carrier 1 is significantly scratched. . Naturally, there is a problem that the load acting on the roller 5 becomes large and the handrail 3 cannot be lifted and lowered and the treadle cannot be moved up and down smoothly.

In the construction disclosed in Japanese Utility Model Publication No. 54-19026, a guide corresponding to a so-called cam for raising and lowering a tread plate is provided at each stop floor on the support tower side of the hoistway, and a transporter is provided. It is necessary to attach an automatic return type lever device operated by the guide to the loading platform, which not only makes the entire structure complicated and expensive,
As a temporary device requires maintenance work such as adjustment, it is not effective.

Further, in a construction elevator equipped with a long carrier, the stepping plate can be opened and closed in an equilibrium state so as not to be tilted left and right other than the configuration in which the raising and lowering of the tread plate is linked to the raising and lowering of the handrail. It is necessary to achieve this, as a means for raising and lowering the handrail, a method of raising and lowering by meshing drive by two driving machines on both the left and right sides, or a method of driving a lifting cable by two winches and raising and lowering it. A method is adopted in which two suspending lines suspending both ends of a handrail with a winch are simultaneously driven to move up and down.
However, any of these methods has a problem that the structure becomes complicated and the production cost increases.

In view of the above, the present invention provides an elevator for construction work equipped with an auto-elevating tread plate which can safely and effectively get on and off the stop floor with a simple structure without complicating the structure of the carrier bed. The purpose is to provide a loading device.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a carrier equipment for a construction elevator, wherein a base portion is pivotally supported by a side edge of the carrier and can be vertically rotated. A tread plate that can be rotated downward by its own weight and spans between the loading platform and the work floor on the building side is attached to the outside of the handrail, and the handrail is provided to be vertically movable above the loading platform. At the lower end of the handrail, a pair of a roller that contacts the base end of the tread plate and rotates the tread plate and a roller that contacts the front edge of the loading platform and retains the horizontal force when the tread plate is raised and lowered are formed as a set. This is a configuration in which a plurality of tread plate operation mechanisms supported by a bracket are provided.

The present invention also relates to a lift for construction work, in which a handrail is moved up and down along a support provided with a pair of guide rails erected at both ends of a side edge of a long carrier. This handrail is connected to the lower end of a hanging chain that hangs around a sprocket attached to each top of each of the two columns, and the other end of one of the hanging chains of each of the hanging chains is The other end of the other suspension chain is connected to a drive rope wound on a winch mounted on the carrier, and the other end of the suspension chain is wrapped around a guide sheave arranged at the lower part of the carrier, at the connection side between the one suspension chain and the handrail. The handrail is connected to a driven rope connected to the lower end of the handrail so that the handrail can be suspended horizontally by driving the winch. Hand Ri is a configuration in which the interlocking footplate is provided so as to be erected at once lowered the handrail lower end.

[0011]

In the present invention thus constructed, the handrail is located at the edge of the loading platform when the carrier is lifted and lowered, so that the footboard is operated by the footboard operating mechanism attached to the lower end of the handrail. The proximal end is depressed and held upright. When the carriage is raised and lowered to reach the stop floor and raises the handrail, the treadle operation mechanism attached to the handrail also rises, and the treadle that has been erected up to that point is urged to the base end by its own weight. As the pressing force decreases, the vehicle turns and falls, and a tread plate is suspended between the carrier of the carrier and the work floor on the building side. When the stepping plate is raised and lowered, one of the rollers of the stepping plate operation mechanism is in contact with only the base end portion of the stepping plate, and the other roller is only in contact with the front edge of the loading platform. The rollers are also brought into rolling contact with each other, and the horizontal acting force is shared by the rollers, so that a smooth operation is performed. Therefore, no damage occurs at the portion.

When the handrail is lifted and lowered, the suspension drive on both sides is connected to the suspension chain such that one drive side of the handrail is connected to the other driven side so that power can be transmitted to both at the same time. The handrail is connected with a rope, and the handrail is suspended and lifted by a hanging chain meshed with and wound around a sprocket at the top of the column, so that the left and right sides are always driven synchronously, and thus the handrail is inclined. Do not go up and down. Naturally, smooth lifting operation can be performed.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a construction carrier apparatus for a construction elevator according to the present invention. FIG.
FIG. 2 is a front view of a specific example in which a part of the carrier bed device of the present invention is omitted, FIG. 2 is an enlarged longitudinal sectional view showing a main part, and FIG. FIG. 4 is an enlarged front view of the mechanism, and FIG. 4 is a plan sectional view taken along line IV-IV of FIG. FIG. 5 is a schematic view showing the handrail lifting drive means, and FIG. 6 is a view showing an example of a buffer mechanism incorporated in the handrail lifting drive means.

In these figures, the transporter 10 of the present invention comprises:
A long loading platform type that can be moved up and down by a meshing drive along a guide rail provided on one side of each of a pair of towers (not shown) supported and erected along the building.
Handrail attached to at least the side edge of the work floor
However, the opening and closing operation can be performed on the upper side of the upper surface of the carrier 11.

The handrail 20 is provided with handrail guide rails 14 and 14 attached to columns 13 and 13 symmetrically provided at both ends of the loading platform 11.
Guide rails 22 are provided at both ends of the handrail frame 21 and are vertically movable so that the guide rollers 22 can be raised to a predetermined height above the loading floor 12. Two suspension chains (hereinafter referred to as roller chains) 31, 3 suspended from the tops of the columns 13, 13 as lifting and lowering drive means 30 for the handrail 20.
1 'are respectively connected to upper end edges of both ends of the handrail frame 21 via a buffer mechanism 36, and the roller chains 31, 31' are connected via a drive rope 33 drawn out from a driving winch 32 and the handrail frame 21. Is connected to a driven rope 34 arranged in a horizontal direction, and is driven up and down in synchronism with the left and right.

In the lifting drive means 30 of the handrail 20, a roller chain is wound around and suspended from sprockets 35, 35 'supported by brackets 15 provided symmetrically at the tops of the columns 13, 13, respectively. A buffer mechanism 36 is provided at the lower end of the handrail frame 21 of the handrail 20 at the lower end.
Of the handrail frame 21 (see FIG. 5). These two roller chains 31, 31 'are connected to the other end of one roller chain 31 via a turnbuckle 37 at the end of a drive rope 33 drawn out from a drum of a winch 32 mounted inside the carrier 11. The other end of the roller chain 31 'is connected at one end to the lower end of the handrail frame 21 to which the roller chain 31 on the driving side is connected. The tip of the driven rope 34 stretched upward along the
Connected via 37. Each of the turnbuckles 37,
37 is a roller chain 31, 31 'and a drive rope 33,
It is provided for adjusting the length of the driven rope 34.

With this configuration, when the transporter 10 moves up and down to the required floor and opens the handrail 20 after stopping, when the winch 32 is driven and the drive rope 33 is wound on the drum,
One roller chain 31 connected to this drive rope 33
Handrail 20 is pulled up. Then, the handrail 20 is connected to the driven rope 34 because the driven rope 34 having one end connected to the lower edge of the handrail frame 21 is simultaneously pulled on the roller chain 31 side connected to the drive rope 33. The other roller chain 31 'operates at the same time, so that the handrail 20 is raised synchronously at both ends. Also, at this time, the handrail 20 is
31 'is the sprocket 35,35'
Therefore, even if the long handrail 20 is long, the roller chains 31, 31 'can be moved up and down smoothly without being inclined and twisted. In order to close the opened handrail 20, the winch 32 is driven to rotate in the reverse direction, whereby the driving rope 33 and the driven rope 34 and the roller chains 31, 31 'operate in the reverse manner, and the handrail 20 is properly lowered. It is.

Further, when the handrail 20 is opened and closed as described above, the suspension roller chains 31, 31 'are connected via a buffer mechanism 36. As shown in FIG. 6, the roller chain
Movable rod with joint 36b to be connected to 31, 31 'respectively
36a penetrates the upper cross member of the handrail frame 21, and the other end of the coil spring 36c and the washer 36, one end of which abuts against the lower surface of the handrail frame 21.
d and a nut 36e. Since the suspension roller chains 31, 31 'are connected to the handrail 20 with such a buffer mechanism 36 interposed therebetween, at the time of starting lifting or immediately after the end of lowering, the buffer mechanism 36
There is an advantage that the drive section of the lifting drive means 30 is buffered by the action of the above, so that the start and stop can be performed without receiving an unreasonable external force.

Next, outside the handrail 20, the handrail
The tread plate 40 corresponds to the opening / closing section 20 and the loading platform at the time of landing of the transporter 10.
Brackets 15 are provided in such a manner that they are divided into a plurality according to the length of the loading platform 11 so as to be bridged between the loading platform 11 and a work floor (not shown) on the building side, and each of the brackets 15 protrudes from the front edge of the loading platform 11.
The base is pivotally connected by a pivot pin 16 and is provided so as to be vertically rotatable. The tread plate 40 can be rotated by its own weight in a range from the standing state to being received on the work floor.

The handrail 20 is provided with respect to such a step plate 40.
At the bottom edge of the handrail frame 21, the treadle operation mechanism
A plurality of 45 are attached downward. This treadle operation mechanism
2 to 4, two rollers 47a and 47 are provided by a bracket 46 fixed to the lower surface of the handrail frame 21, as shown in FIGS.
b are rotatably supported by the eccentric shafts 47, respectively, and the handrail 20 is inserted into a gap formed between the front side of the platform and the pivotal support of the tread plate 40 with the handrail 20 lowered onto the platform 11. It is arranged as follows. Therefore, the rollers 47a and 47b of the step board operating mechanism 45 have one roller 47a abutting against the backing plate 17 attached to the upper front edge of the loading platform, and the other roller 47b against the base end surface 42 of the step board 40. By contact, the tread plate 40 is held upright with the pivot pin 16 as a fulcrum.

At a position slightly above the lower end of the handrail frame 21, a stepping plate pressing means 50 is provided so as to face the stepping plate 40. As shown in FIG. 2, the stepping plate pressing means 50 has a rear end held by a fixed plate 52, and a rear end held by a fixed body 52, which is incorporated into the vertical member 23 of the handrail frame 21 or attached to the side of the vertical member. The thrust is urged by the coil spring 53 toward the stepping plate 40 side, and the roller 56 is provided with a holder 55 provided with the tip of a rod 54 which penetrates through the fixed plate 52 and is locked so as not to protrude behind the fixed plate 52. Is held. When the tread plate pressing means 50 is not necessarily rotated by its own weight during the period from when the tread plate 40 is tilted down to a standing state (which is held upright and slightly tilted to the falling side), the stepping plate pressing means 50 is surely used for the tilting operation. As done, treads
It has a function to apply a pressing force to the surface of the forty. Reference numeral 44 in the figure denotes a stopper that regulates the lower limit of the tread plate 40 when it falls down. The stopper 44 is provided so as to be in contact with the front end of the bracket 15 for pivoting the tread plate.

In the configuration in which the tread plate 40 is raised and lowered in conjunction with the vertical movement of the handrail 20, the one roller 47a of the tread plate operation mechanism 45 is turned on while the handrail 20 is being lowered onto the carrier 11. Abutting against the base end surface 42 of the tread plate 40 and standing up,
The other roller 47b has a horizontal component force of the reaction force caused by the standing of the tread plate 40 abutting against the abutment plate 17 on the loading platform 11 side, and the external force is individually shared. Therefore, when the handrail 20 is raised, the rollers 47a and 47b can be individually rotated on the same axis (the eccentric shaft 47), so that the rollers 47a and 47b are rolled and raised without any trouble. As the rollers 47a and 47b move closer to the pivot point of the tread plate 40, the pressing force applied to the base end surface 42 is removed, so that the tread plate 40 is tilted in the falling direction by its own weight.

Here, even if the tread plate 40 is not positively tilted by its own weight, the tread plate pressing means 50 attached to the handrail frame 21 will not be used.
By the roller 56 supported by the holder 55, which has been compressed and pushed by the coil spring 53 by 40, the stepping plate 40 is pushed forward by the accumulating force of the coil spring 53, and as a result, the stepping plate 40 can be positively tilted. it can.

Therefore, as the handrail 20 is lifted, the force for restricting the tilt of the tread plate 40 by the tread plate operating mechanism 45 is removed, and at the same time, the tread plate 40 is simultaneously lowered, so that the gap between the loading platform 11 and a work floor (not shown) is formed. , And the crossing of the tread plate 40 allows the vehicle 10 and the building to get on and off safely.

When the handrail 20 is lowered to move the transporter 10, the falling stepboard 40 is brought into contact with the base end surface 42 by the rollers 47a, 47b of the stepboard operating mechanism 45 attached to the lower part of the handrail 20. Then, the handrail 20 is added with its own weight, so that the handrail 20 is turned in the rising direction with the pivot pin 16 as a base point. And when the rollers 47a and 47b pass the pivot point,
One roller 47a is in contact with the base end surface 42 of the tread plate 40 and rolls, and the other roller 47b is
The rollers 47a, 47b are lowered as they are to raise the tread plate 40 to a predetermined position, and are maintained in a state that does not hinder the lifting and lowering of the transporter 10. At this time, as described above, the stepping plate operation mechanism 45 includes two rollers 47a and 47b in which the eccentric shaft
Since the rollers 47a and 47b can be freely rotated and moved on each other, they can be operated without difficulty, and there is no hindrance in the portions where the rollers 47a and 47b move.

In the above embodiment of the present invention, the pair of rollers 47a and 47b in the stepping plate operation mechanism 45 are described as being supported on one eccentric shaft 47. However, these rollers are separately provided. It can be made to be supported by a shaft. In addition, if a safety device is provided along with the buffer mechanism 36 in the hanging portion of the handrail 20 in case of an accidental breakage in the hanging drive unit, the handrail 20 can be lifted during work. Safety can be maintained. In this safety device, a locking piece supported in the form of a lever link utilizing the up and down movement of a movable rod 36a in the buffer mechanism 36 engages with an emergency guide rail and is guided by a guide roller and a locking piece. It is preferable to use a known means for clamping and locking a part of the rail. In addition, when the handrail lifting safety device is installed, it is preferable that the tops of both columns are connected to each other by a cross beam member so that the columns are stabilized.

[0027]

According to the present invention, the tread plate operating mechanism of the tread plate which is raised and lowered in conjunction with the opening and closing of the handrail of the transporter shares the load with the roller abutting on the side of the loading platform and the roller directly operating the tread plate. In addition, since the rollers are always configured to be able to roll, no excessive load is applied to the operation part, and therefore, a step plate pressing means for enduring long-term use and positively tilting the step plate should be provided. Thus, the tread can be reliably moved up and down. In addition, the vertical movement of the handrail can be driven in a simple configuration and synchronized left and right, so that even a long handrail can be smoothly moved up and down without any trouble.

[Brief description of the drawings]

FIG. 1 is a front view of a specific example in which a part of a carrier loading device of the present invention is omitted.

FIG. 2 is an enlarged longitudinal sectional view showing a main part.

FIG. 3 is an enlarged front view of a tread plate operating mechanism.

FIG. 4 is a plan sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a schematic diagram showing a handrail lifting / lowering drive unit.

FIG. 6 is a diagram showing an example of a buffer mechanism incorporated in a handrail lifting drive unit.

FIG. 7 is a view showing a main part of a tread plate operation mechanism which can be turned up and down in conjunction with a handrail in a conventional carrier bed device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Carriage 11 Carrier 12 Carrier floor 13 Prop 14 Handrail guide rail 15 Bracket for mounting a footboard 16 Footboard support pin 17 Support plate 20 Handrail 21 Handrail frame 22 Handrail guide roller 23 Vertical member of handrail frame 30 Handrail lifting drive means 31, 31 'Suspended roller chain (suspended chain) 32 Winch 33 Drive rope 34 Followed rope 35, 35' Sprocket 36 Buffer mechanism 36a Movable rod 36b Joint 36c Coil spring 37 Turnbuckle 38, 38 '' Guide sheave 40 tread plate 42 base end surface of tread plate 45 tread plate operation mechanism 47 eccentric shafts 47 a, 47 b roller 50 tread plate pressing means 51 capsule 53 coil spring 54 rod 55 holder 56 roller

Claims (4)

(57) [Scope of request for utility model registration] 1. A carrier loading device for a construction elevator, wherein a base is pivotally supported by a side edge portion of the loading platform and is vertically rotatable and can be rotated downward by its own weight. A treadle spanned between is attached to the outside of the handrail, the handrail is provided so as to be able to move up and down on the upper side of the loading platform, and a lower end of the handrail is in contact with a base end of the treadle. A plurality of tread plate operating mechanisms supported by a bracket are provided as a set of a roller for rotating the tread plate and a roller in contact with the front side edge of the loading platform to hold the horizontal force when the tread plate is lowered. Carrier equipment for elevators for construction work. 2. The carrier bed device for a lift for construction work according to claim 1, wherein in the step board operating mechanism, two rollers are supported by an eccentric support shaft on the bracket. 3. A stepping plate pressing means for urging a thrust in a falling direction at an initial stage of downward rotation of a stepping plate in an upright state, above a mounting portion of the stepping plate operation mechanism in the handrail. 2. The carrier bed device of the lift for construction work according to 1. 4. A handrail device for a construction elevator, wherein a handrail is provided along a column having a pair of guide rails erected at both ends of a side edge of a long carrier so as to be vertically movable on the carrier. The handrail is connected to a lower end of a hanging chain that hangs around a sprocket attached to each of the tops of the both columns, and the other end of one of the hanging chains is a carrier. The other end of the other suspension chain is wrapped around a guide sheave arranged at the lower part of the loading platform, and the other end of the other suspension chain is connected to the one suspension chain and the handrail at the connection side. The handrail is connected to a driven rope connected to the lower end of the handrail, so that the handrail is suspended in synchronization with the left and right sides by driving the winch. Handrail A stepper plate interlockingly provided so as to be raised at the lower end of the handrail when the handrail is lowered, is a carrier bed device of a lift for construction work.