JP2013019195A - Brake equipment for scaffold lift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake equipment capable of remarkably improving safety by braking a lifting load-carrying platform at two locations even when a chain or wire of lifting means of the lifting load-carrying platform cuts off.SOLUTION: A hanging metal fitting 110 to which a lower end of a chain of a chain block is fixed is attached to an upper part of a lifting load-carrying platform 10 such that the hanging metal fitting can be lifted and lowered freely within a range of a predetermined dimension with respect to the lifting load-carrying platform 10; a brake metal fitting 106 is fitted to each of a pair of guide rails 5, the brake metal fitting 106 having a rail insertion hole 106a of an inner shape having a predetermined minute clearance with respect to an outer shape of the guide rail 5; and when the chain is unexpectedly cut off and the hanging metal fitting 110 is lowered with respect to the lifting load-carrying platform 10, the brake metal fitting 106 turns from a horizontal position to an inclined position and thereby bites the outer periphery of the guide rail 5 to stop the lifting load-carrying platform 10.

Description

  The present invention relates to a braking device for a scaffolding elevator that is attached to a building site or a scaffolding that is installed at the time of repairing an existing building, and that loads and unloads materials necessary for construction, scaffolding construction members, and the like. .

  When building or repairing a building, a scaffold including a floor board and a handrail is temporarily installed so that an operator can safely work or move at a high place.

  When raising and lowering materials and scaffold construction members between the upper layer of the scaffold and the ground, personnel were placed on each layer of the ground and the scaffold, and the materials and members were loaded and unloaded by hand. However, this requires a large number of personnel for the work of loading and unloading, and it takes a long time, and there is a high risk that a material failure will result in a serious accident if the delivery fails. In addition, the work cost is high because a lot of personnel and time are required.

  In order to improve such human tactical work, materials and members are also lifted and hung using pulleys and ropes, but the weight at one time is limited to 20 kg. It ’s impossible to work for a long time because your hands are tired. In addition, since the materials and members are bundled with a rope, if the bundle is removed, the materials and members fall and it is dangerous.

  Although it is conceivable to use a heavy machine such as a crane to raise and lower materials and parts, there are places where it is difficult for the crane to enter, and the introduction cost and rental cost of heavy equipment are also high.

  In order to solve such a problem, Patent Document 1 discloses a scaffold in which a framework is formed by a pipe for scaffolding, a space for lifting a platform that is opened vertically to a part of the scaffold, and a space for lifting a platform. A pair of guide rails fixed vertically to the scaffolding pipes on both sides, a cage type lifting platform placed in the platform lifting space, and a pair of guides provided at the upper and lower positions on both sides of the lifting platform A guide roller that rotates so as to travel on the rail and regulates the horizontal position of the lifting platform, a chain block that is installed at the top of the loading platform lifting space and winds up a chain fixed to the upper portion of the lifting platform, A scaffold work lift is disclosed that includes a lift drop safety device (safety block) that operates when a lifting platform is dropped at a predetermined speed or more to stop the lifting platform.

  Patent Document 2 discloses a guide rail fixed to a temporary structure, a lifting member that can be moved up and down along the guide rail, and a lifting member that is attached to the upper end of the guide rail to move the lifting member up and down. And a load mounting member attached to the horizontal portion of the elevating member so as to be pivotable, and the lock mechanism for fixing the load mounting member to the elevating member on the load mounting member and the elevating member In the apparatus for lifting a temporary structure provided with a load, the load placing member is supported by an arc-shaped rail provided on the horizontal portion of the elevating member, and the load placing member is positioned at the center of the arc-shaped rail on one side of the guide rail. An apparatus for lifting a temporary structure in which a lock mechanism is attached to a vertical fulcrum shaft provided on the elevating member so that the load mounting member is fixed to the arc-shaped rail is disclosed. The That.

Japanese Patent No. 4397431 JP 2002-81205 A

  As described above, in a lift for lift work (elevator) installed at a construction site or when repairing an existing building, the lifting platform (elevating member) is raised and lowered by lifting means such as a chain block. A safety block and a lock mechanism are provided to prevent the lifting platform from falling when the chain or wire is cut.

  However, since the conventional safety block and the lock mechanism support the lifting platform at one means or at one place, if they break down, it becomes impossible to stop the lifting platform from falling, which may lead to an accident.

  In particular, the number of high-rise buildings has increased in recent years. For example, in a high-rise building of 30 m or more, the size of the lifting platform is increased in order to reduce the number of times of lifting, and the weight is also increased. For this reason, it is required to reliably brake and lift the lifting platform in case the lifting platform is dropped.

  Therefore, an object of the present invention is to provide a braking device that can significantly improve safety by braking the lifting platform in two places even if the chain or wire of the lifting means of the lifting platform is cut.

In order to solve the above problems, the present invention provides a scaffold in which a framework is formed by a pipe for scaffolding, a space for lifting the platform vertically opened to a part of the scaffold, and a scaffold on both sides of the space for lifting the platform. A pair of guide rails fixed to the pipe and installed vertically, a cage-type lifting platform placed in the platform lifting space, and provided at the vertical positions on both sides of the lifting platform, the pair of guide rails A guide roller that rotates to travel and regulates the horizontal position of the lifting platform, and a chain block that is installed at the top of the loading platform lifting space and winds up a chain fixed to the upper portion of the lifting platform. A lifting device for a lift for a scaffold,
At the upper part of the lifting platform, a hanging bracket to which the lower end of the chain of the chain block is fixed is attached to the lifting platform so that it can be raised and lowered by a predetermined dimension,
Each of the pair of guide rails is fitted with a brake fitting having an inner rail insertion hole having a predetermined minute clearance with respect to the outer shape of the guide rail, and the outer shape of the guide rail is The brake bracket is attached to the upper part of the lifting platform so as to be rotatable from a horizontal position where a minute clearance is maintained to an inclined position where the insertion hole is pressed against the outer shape of the guide rail,
Interlocking means for interlocking the brake bracket with the suspension bracket so that the brake bracket is in a horizontal position at the raised position of the suspension bracket and the brake bracket is at an inclined position at the lowered position of the suspension bracket. It is provided.

  In the present invention, the suspension bracket that is suspended by the chain of the chain block in a normal state is in a state of being pulled upward by the chain at the upper part of the lifting platform, so the brake bracket that is interlocked with the suspension bracket is Therefore, the brake fitting is in a state where a predetermined minute clearance is held with respect to the guide rail. Therefore, the lifting platform is driven up and down without any trouble with respect to the guide rail.

  In the unlikely event that the chain of the chain block is cut and the lifting platform is about to fall, the suspension metal fitting is lowered relative to the lifting platform because there is no force to be pulled up against the lifting platform. Then, the brake fitting is rotated from the horizontal position to the inclined position by the interlocking means. As a result, the rail layer through-hole of the brake fitting comes into pressure contact with the outer periphery of the guide rail, and the lifting platform is stopped by the frictional force. Since the brake brackets are respectively fitted to a pair of guide rails, the brake bracket stops reliably, and even if one of the brake brackets does not rotate well to the inclined position, or between the inclined brake bracket and the guide rail, Even if the frictional force between them does not reach a prescribed magnitude, the lifting platform is stopped by the operation of the other brake fitting.

  In the present invention, it is preferable to provide a biasing means, for example, a spring, between the lifting platform and the brake fitting so that the brake fitting is forced to the inclined position at the lowered position of the suspension fitting. Thereby, operation | movement of a brake metal fitting can be ensured.

  According to the present invention, the hanging bracket to which the lower end of the chain of the chain block is fixed is attached to the upper part of the lifting platform so that it can be moved up and down by a predetermined dimension with respect to the lifting platform. The outer shape of the guide rail from a horizontal position in which the brake fitting having an inner rail insertion hole having a predetermined minute clearance is fitted to the outer shape of the guide rail and the minute clearance is retained with respect to the outer shape of the guide rail. Attach the brake bracket to the upper part of the lifting platform so that it can rotate to the inclined position where the insertion hole is pressed against the mounting hole.When the lifting bracket is in the raised position, the brake bracket is in the horizontal position. By providing interlocking means for linking the brake bracket to the suspension bracket so that the brake bracket is in the inclined position, Even if the chain or wire is cut, it is possible to remarkably improve safety by braking the elevator loading platform in two places.

It is a top view which shows a part of scaffolding which installed the elevator for scaffolding which concerns on embodiment of this invention. It is a front view which shows a part of upper part of the scaffold which installed the elevator for scaffolding which concerns on embodiment of this invention. The detail of the guide roller unit in the lifting machine for scaffolds concerning embodiment of this invention is shown, (a) is a principal part front view, (b) is a principal part top view. It is an upper part front view of the lifting platform which concerns on embodiment of this invention. It is an upper side view of the lifting platform according to the embodiment of the present invention. It is a top view of the lifting platform according to the embodiment of the present invention. It is a principal part enlarged front view of the braking device concerning an embodiment of the invention. It is a principal part enlarged plan view of the braking device concerning an embodiment of the invention.

Embodiments of the present invention will be specifically described below with reference to the drawings.
As shown in FIG. 1 and FIG. 2, the scaffold elevator according to the embodiment of the present invention is a scaffold A assembled along the wall surface of the building B to be built or the building B to be repaired. It is installed so as to be able to move up and down in a loading platform lifting space C formed by opening the part in the vertical direction. The scaffold A is assembled by using the vertical pipe 1 and the horizontal pipe 2 and the like, and is constructed by attaching a tread board 4, a handrail, a bracket, a diagonal member, a jack, and the like thereto.

  A pair of guide rails 5 are vertically fixed by rail fixing brackets 6 on the opposing vertical pipes 1 on both sides of the platform C lifting space C of the scaffold A. Guide roller units 11 attached to both sides of a rectangular parallelepiped cage lifting platform 10 are mounted on the pair of guide rails 5 so that the lifting platform 10 can be moved up and down in the vertical direction. The left and right horizontal positions are regulated.

  The lifting / lowering platform 10 is lifted and lowered by an electric chain block 13 (for example, ED240 manufactured by KITO Corporation) suspended by a lifting platform suspension bracket 12 at the top of the platform lifting space C of the scaffold A. . That is, the hook 15 at the lower end of the chain 14 that is driven up and down by the electric chain block 13 is hung on the fitting hole 110a of the hanging metal fitting 110 that is attached to the upper part of the upper frame 101 of the lifting platform 10 so as to be movable up and down by a predetermined dimension. Yes. The other end of the chain 14 wound up by the electric chain block 13 is housed in a chain bag 16 so as not to hang downward.

  Details of the above-described guide roller unit 11 are shown in FIG. The guide roller unit 11 is attached to the four surfaces of the guide rail 5 by attaching rollers 119 to each of the fixed plates 118 fixed by welding, bolting, etc. at an angular interval of 90 degrees between the upper and lower C-shaped roller mounting plates 117. An abutting roller 119 can be attached. The base of the C-shaped roller mounting plate 117 is fixed to two surfaces of the mounting member 120 having an L-shaped cross section fixed to the side plate 109 of the lifting platform 10 by bolting or welding. Each roller 119 is attached with a slight clearance with respect to the four surfaces of the guide rail 5 so that the straightness when the guide rails 5 are extended to a predetermined height and the lifting platform 10 is attached. Even if the degree of parallelism with the material 120 does not appear to some extent, the error is absorbed so that it can be raised and lowered smoothly.

  Next, a braking device according to an embodiment of the present invention will be described with reference to FIGS. At both sides of the upper frame 101 of the lifting platform 10, mounting brackets 111 provided with elongated holes 111a for allowing the lifting bracket 110 provided with fitting holes 110a for hooking hooks 15 to be raised and lowered by a predetermined dimension are fixed. A bolt 110b provided on the metal fitting 110 is fitted into the elongated hole 111a. Therefore, the hanging metal fitting 110 is movable up and down by the length obtained by subtracting the diameter of the bolt 110b from the length of the long hole 111a. A lifting bracket 102 is connected to the front of the hanging bracket 110 by welding or the like, and on both sides of the lifting bracket 102, a receiving bracket 103 provided with a long hole 103 a is fixed to the upper frame 101, and a bolt provided on the lifting bracket 102. 102b is fitted into the long hole 103a.

  Both sides of the elevating metal fitting 102 are inclined, and a cam plate 104 whose end face 104b is in contact with the inclined surface 102c is rotatably attached to the support metal fitting 105 by a bolt 104a. A brake fitting 106 having an inner rail insertion hole 106a having a predetermined minute clearance than the outer shape of the guide rail 5 is firmly fixed to the cam plate 104 by welding or the like. A tension spring 108 is attached between a convex portion 104 c on the cam plate 104 and a convex portion 102 d on the upper part of the lifting / lowering bracket 102 via a spring mounting bracket 107.

  In a state where the hanging metal fitting 110 is suspended by the hook 15 at the lower end of the chain 14 and is raised with respect to the upper frame 101 of the lifting platform 10, the inclined surface 102 c on the side of the lifting metal fitting 102 is formed by the inclined end surface 104 b of the cam plate 104. In the pressed position, the brake fitting 106 is in a horizontal state indicated by a solid line in FIG. In this state, there is an appropriate clearance between the rail insertion hole 106a of the brake metal fitting 106 and the outer shape of the guide rail 5, and the non-contact state exists. Therefore, the chain 14 wound up and down by the electric chain block 13 is used. The raising / lowering of the lifting platform 10 that is suspended is performed without resistance.

  If the chain 14 that suspends the lifting platform 10 is cut, the lifting bracket 102 that has been lifted by the chain 14 loses the lifting force and descends with respect to the upper frame 101 of the lifting platform 10. Then, the cam plate 104 that has been prevented from rotating by the end surfaces 104b coming into contact with the inclined surfaces 102c on both sides of the lifting bracket 102 is located between the convex portion 104c of the cam plate 104 and the convex portion 102d of the lifting bracket 102. The brake metal fitting 106 fixed to the cam plate 104 is rotated as indicated by a two-dot chain line in FIG. As a result, the rail insertion hole 106a on the inner periphery of the brake fitting 106 fitted with a clearance on the outer periphery of the guide rail 5 bites in after contacting the outer periphery of the guide rail 5, and the lifting platform 10 stops. Since the brake fitting 106 is provided on each of the pair of guide rails 5, the lifting platform 10 is stopped by the guide rail 5 and the brake fitting 106 on both sides.

  The present invention relates to a construction site of a newly built building as a braking device that can significantly improve safety by braking the lifting platform in two places even if the chain or wire of the lifting means of the lifting platform is cut. It can be suitably used at the construction site when repairing a building.

A scaffold B building C loading platform lifting space 1 vertical pipe 2 horizontal pipe 4 tread plate 5 guide rail 6 rail fixing bracket 10 lifting loading platform 11 guide roller unit 12 lifting loading platform suspension bracket 13 electric chain block 14 chain 15 hook 16 chain bag 101 upper part Frame 102 Elevating metal fitting 102a Engagement hole 102b Bolt 102c Inclined surface 102d Protruding part 103 Receiving metal part 103a Long hole 104 Cam plate 104a Bolt 104b End face 104c Protruding part 105 Support metal fitting 106 Brake metal fitting 106a Rail insertion hole 107 Spring mounting metal 108 Tensile spring 109 Side plate 110 Suspension bracket 110a Fitting hole 110b Bolt 111 Mounting bracket 111a Long hole 117 C-shaped roller mounting plate 118 Fixing plate 119 Roller 120 Mounting material

Claims (2)

A pair of scaffolds in which a framework is formed by a scaffolding pipe, a loading platform lifting space that is open vertically to a part of the scaffolding, and a vertical installation that is fixed to the scaffolding pipes on both sides of the lifting platform lifting space Guide rails, a cage-type lifting platform placed in the loading platform lifting space, and a vertical position on both sides of the lifting platform, and rotate so as to travel on a pair of guide rails. A scaffolding elevator braking device comprising: a guide roller that regulates a position in a horizontal direction; and a chain block that is installed at an uppermost portion of a loading platform lifting space and winds up a chain that is fixed to an upper portion of the lifting platform.
At the upper part of the lifting platform, a hanging bracket to which the lower end of the chain of the chain block is fixed is attached to the lifting platform so that it can be raised and lowered by a predetermined dimension,
Each of the pair of guide rails is fitted with a brake fitting having an inner rail insertion hole having a predetermined minute clearance with respect to the outer shape of the guide rail, and the outer shape of the guide rail is The brake bracket is attached to the upper part of the lifting platform so as to be rotatable from a horizontal position where a minute clearance is maintained to an inclined position where the insertion hole is pressed against the outer shape of the guide rail,
Interlocking means for interlocking the brake bracket with the suspension bracket so that the brake bracket is in a horizontal position at the raised position of the suspension bracket and the brake bracket is at an inclined position at the lowered position of the suspension bracket. A scaffolding elevator braking device, characterized in that it is provided.   The scaffolding elevator braking device according to claim 1, wherein an urging means is provided between the lifting platform and the brake bracket so that the brake bracket is forcedly inclined when the suspension bracket is lowered.

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