JP2005162374A - Elevator braking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator braking device for braking vertical movement of am elevating element to a guiding rail raised on a hoistway by a simple mechanism. <P>SOLUTION: A friction plate 11 provided on a frame element 10 is pressed on the guiding rail 2 by a pressing element. The frame element 10 is disposed at a position separated to an end portion of the hoistway in regard to a position where the elevating element stops at a terminated position of a hoisting stroke. Therefore, when the elevating element excessively ascends over the terminated position of the hoisting stroke, the frame element 10 held by friction force of the friction plate 11 to the guiding rail 2 is crushed by the elevating element. At that time, in a state that the elevating element excessively ascend, a calculated distance to a rising jump distance can be shortened, and a top portion clearance distance of the hoistway is shortened. Furthermore, the total height of the hoistway can be decreased, so that a construction cost of the hoistway is reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a braking device for an elevator that brakes the vertical movement of a lifting body that is guided up and down by a guide rail standing on a hoistway with respect to the guide rail.

  In the conventional elevator, a car shock absorber facing the car and a counterweight shock absorber facing the counterweight are erected on the bottom surface of the pit of the hoistway. And the top gap distance of the hoistway set by the stroke distance of the counterweight shock absorber + the descent margin distance of the counterweight + the upward jump distance of the car + other margin allowance distance is provided. In addition, a shock absorber stand having a required height is provided in the pit of the hoistway between the car and car shock absorbers, and between the counterweights and the counterweight shock absorbers, in order to secure a required descent margin. . (For example, refer to Patent Document 1).

  Also, a balance rope is provided between the car and the balance weight, and a balance wheel is provided to apply tension to the balance rope. In this case (see, for example, Patent Document 2), there is a case where the balancer is equipped with a damping device composed of a large oil-filled damper in order to attenuate the vertical vibration. The damping device is attached to a mounting beam installed in the pit of the hoistway.

JP 2001-187679 A (2nd page, FIG. 6)

JP-A-8-67454 (summary)

  In conventional elevators, the lift gap at the top of the hoistway becomes longer to take into account the upward jump distance of the car, increasing the overall height of the hoistway and increasing the construction cost of the hoistway, and the shock absorber stand in the pit of the hoistway However, there is a problem that the cost is increased. In addition, there is a problem in that a damping device composed of an oil-filled damper and a mounting beam for the damping device are required for balancing the balancing rope, which increases costs.

  The present invention has been made to solve such problems, and an object of the present invention is to provide an elevator braking device that brakes the vertical movement of the lifting body with respect to the guide rail standing on the hoistway by a simple mechanism. And

  The first means in the elevator braking apparatus according to the present invention includes a guide rail that is erected on a hoistway and movably engaged with a hoisting body that moves up and down the hoisting stroke set in the hoistway, and a horizontal projection surface In the groove shape, the guide rail guide portion is disposed in a fitted state and is opposed to the lifting body, and is located closer to the end of the hoistway than the end position of the lifting stroke. Body, a friction plate provided in the groove shape of the frame body and disposed on both sides of the guide portion of the guide rail, and one side held by the groove-shaped side wall of the frame body and pressing the friction plate by the other side The pressing body is provided, and the frame body is pushed and moved by the lifting body that moves up and down excessively.

  Further, the second means in the elevator braking device according to the present invention includes a guide rail that is erected on the hoistway and that is vertically engaged in the hoistway, and a groove in the horizontal projection plane. The guide body of the guide rail is arranged in a fitting shape in the groove shape and is mounted on the lifting body, and the frame is provided on the both sides of the guide rail guide portion. Each of the friction plates and a pressing body that is held on one side by the groove-shaped side wall of the frame and presses the friction plate by the other side are provided, and the vertical displacement of the lifting body is braked by the pressed friction plate. To do.

  In the elevator braking apparatus according to the first means of the present invention, the friction plate provided on the frame is pressed against the guide rail by the pressing body. And a frame is arrange | positioned in the position which left | separated near the edge part of the hoistway with respect to the position which a raising / lowering body stops in the terminal position in the raising / lowering process. As a result, when the lifting / lowering body over-lifts beyond the end position of the lifting / lowering stroke, the frame body held by the frictional force by the friction plate pressed by the guide rail is pushed by the lifting / lowering body. At this time, the calculation distance corresponding to the rising jump distance can be shortened in a situation where the lifting body is excessively raised, and the top gap distance of the hoistway can be shortened.

  Therefore, the overall height of the hoistway can be reduced, and the construction cost of the hoistway can be reduced. Moreover, the excessive raising / lowering operation | movement of the raising / lowering body with respect to the guide rail standingly arranged in the hoistway can be braked with the simple mechanism which uses a frame, a friction board, and a press body as the principal part. Thereby, there is no need to provide a shock absorber corresponding to the lifting body in the pit of the hoistway, and there is an effect of reducing the cost of installing the shock absorber base.

  In the elevator braking device according to the second means of the present invention, the vertical displacement of the lifting body is braked by the braking means provided on the lifting body pressing the guide rail. As a result, the vertical vibration generated in the balance wheel, that is, the lifting body can be damped, so that it is not necessary to provide a large damping device composed of an oil-filled damper, and the installation of the beam for mounting the damping device can be omitted. . For this reason, the means for damping the vertical vibration can be reduced in size and weight and can be easily installed, and the manufacturing cost and installation cost are reduced.

Embodiment 1 FIG.
1 to 3 are views showing an embodiment of the present invention. FIG. 1 is a front view conceptually showing a main part of an elevator hoistway. FIG. 2 is a plan view of a portion indicated by an arrow A in FIG. FIG. 3 is a sectional view taken along line BB in FIG. 2. In the figure, guide rails 2 are erected apart from each other in the hoistway 1, and an elevating body 3 made up of a car that moves up and down the hoisting path in the hoistway 1 is movably engaged. In addition, the raising / lowering body 3 is suspended by the main rope 4 driven by a hoisting machine (not shown).

  Further, the lifting body 3 is mounted on the four corners of the car frame 7 and the car room 7 placed in the car frame 5 via the anti-vibration rubber 6 in the car frame 5 to guide the guide rail 2. A guide 9 that is slidably engaged with 8 is configured as a main member. Further, the frame body 10 formed in a groove shape on the horizontal projection surface has the guide portion 8 of the guide rail 2 fitted in the groove shape so as to face the upper surface or the lower surface of the lifting body 3. The frame body 10 is disposed closer to the end of the hoistway 1 than the end position above or below the ascending / descending stroke of the elevating body 3.

  And the friction plate 11 is provided in the groove shape of the frame 10, and is arrange | positioned at the both sides of the guide part 8 of the guide rail 2, respectively. Further, the bolt 12 is inserted into one side of the groove-shaped side wall 13 in the frame body 10, the head portion is arranged to face the friction plate 11, and the nuts 14 screwed into the bolt 12 are arranged on both sides of the side wall 13. Is done. And the press body 15 which consists of compression coil springs is provided, the one side of the press body 15 is hold | maintained at the head of the volt | bolt 12, and the friction plate 11 is pressed by the other side. The bolt 12 and the nut 14 constitute a screw mechanism 121.

  In the elevator braking apparatus configured as described above, the friction plate 11 provided in the groove of the frame body 10 is pressed by the pressing body 15 via the screw mechanism 121 to rub the guide portion 8 of the guide rail 2. The plate 11 is clamped and the frame 10 is held on the guide rail 2. Then, the nut 14 is rotated to change the position of the bolt 12 with respect to the friction plate 11, and the pressing force of the friction plate 11 by the pressing body 15 is appropriately set so as to obtain a required braking force described later.

  Further, the frame body 10 is disposed at a position away from the end of the hoistway 1 by a distance C shown in FIG. And when the raising / lowering body 3 over-lifts beyond the end position of the raising / lowering stroke, the braking distance by which the frame body 10 hold | maintained by the frictional force by the guide part 8 of the guide rail 2 is pushed by the raising / lowering body 3 is made. Let L be. At this time, in a situation where the lifting body 3 is excessively raised, the top gap distance of the hoistway 1 corresponding to [climbing jump distance− (C + L)] can be shortened.

  Therefore, the overall height of the hoistway 1 can be lowered, and the construction cost of the hoistway 1 can be reduced. With such a configuration, the lifting / lowering operation of the lifting / lowering body 1 with respect to the guide rail 2 erected on the hoistway 1 can be braked by a simple mechanism including the frame body 10, the friction plate 11, and the pressing body 15. it can. Thereby, it is not necessary to provide a shock absorber (not shown) corresponding to the lifting body 3 in the pit of the hoistway 1, and the cost for installing the shock absorber stand can be reduced.

Embodiment 2. FIG.
4 and 5 are diagrams showing another embodiment of the present invention. FIG. 4 is a view corresponding to FIG. 2 described above, and FIG. 5 is a cross-sectional view taken along the line DD of FIG. In the figure, the same reference numerals as in FIGS. 1 to 3 indicate the corresponding parts, and a pressing body 16 made of a rubber piece is provided so that one side of the pressing body 16 is held on the head of the bolt 12. The friction plate 11 is pressed by the side.

  Also in the elevator braking device configured as described above, the friction plate 11 provided in the groove of the frame body 10 is pressed by the pressing body 16 via the screw mechanism 121, and the guide portion 8 of the guide rail 2 is moved. The frame 10 is held on the guide rail 2 by clamping. And the frame body 10 is arrange | positioned in the position left | separated by the distance C shown in above-mentioned FIG. 1 near the edge part of the hoistway 1 with respect to the position where the raising / lowering body 3 stops in the end position in the raising / lowering stroke.

  Therefore, although the detailed description is omitted, the same operation as the embodiment of FIGS. 1 to 3 can be obtained also in the embodiment of FIGS. Further, since the pressing body 16 is made of rubber, the shape of the pressing body 16 can be freely selected, and the structure including the frame body 10, the friction plate 11, and the pressing body 16 as main parts can be reduced in size and easily. Can be equipped on the guide rail 2.

Embodiment 3 FIG.
FIG. 6 is also a view showing another embodiment of the present invention, and is a front view conceptually showing the lower part of the elevator hoistway. In the figure, the same reference numerals as those in FIGS. 1 to 3 indicate the corresponding parts, and the car rails 17 are erected away from the hoistway 1 so that the car 18 is movably engaged. Further, the counterweight rails 19 are erected apart from each other in the hoistway 1 so that the counterweight 20 is movably engaged.

  Then, both ends of the balancing rope 21 are connected to the car 18 and the counterweight 20, respectively, and suspended from the hoistway 1 to form a curved portion at the bottom. Further, the guide rails 22 are erected apart from each other in the hoistway 1 and are arranged at positions corresponding to the curved portions of the counter rope 21. And the raising / lowering body 23 which consists of a balance wheel which provides tension | tensile_strength to the balance rope 21 is provided in the straddle state in the curved part of the balance rope 21. FIG. Although not shown, a guide is provided on the frame of the lifting body 23 and the lifting body 23 is movably engaged with the guide rail 22.

  In addition, the frame of the elevating body 23 is provided with a braking means 24 configured mainly with the frame body 10, the friction plate 11, and the pressing body 15 as shown in FIG. 2 and FIG. Then, the friction plate 11 is pressed against the guide portion of the guide rail 22 by the pressing body 15, and the braking means 24 holds the frame body 10 on the guide rail 22. Thereby, the vertical movement of the lifting body 23 is braked with respect to the guide rail 22 by the braking means 24.

  In the elevator braking apparatus configured as described above, the vertical displacement of the lifting body 23 is braked by the braking means 24 provided on the lifting body 23 pressing the guide rail 22. As a result, the vertical vibration generated in the balance wheel, that is, the lifting / lowering body 23 can be damped, so that it is not necessary to provide a large damping device composed of an oil-filled damper, and the installation of the beam for mounting the damping device is omitted. it can. For this reason, the means for damping the vertical vibration can be reduced in size and weight and can be easily installed, and the manufacturing cost and installation cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Embodiment 1 of this invention, and is a front view which shows notionally the principal part of an elevator hoistway. The top view of the arrow A location in FIG. BB sectional drawing of FIG. FIG. 3 is a diagram showing a second embodiment of the present invention and corresponding to FIG. 2 described above. The DD sectional view taken on the line of FIG. It is a figure which shows Embodiment 3 of this invention, and is a front view which shows notionally the lower part of an elevator hoistway.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Hoistway, 2 Guide rail, 3 Elevator, 8 Guide part, 10 Frame, 11 Friction plate, 121 Screw mechanism, 13 Side wall, 15 Press body, 16 Press body, 22 Guide rail, 23 Elevator, 24 Braking means 24.

Claims (5)

  A guide rail that is erected on the hoistway and that is movably engaged with an elevating body that moves up and down the hoisting stroke set in the hoistway; and a guide rail that is formed in a groove shape on a horizontal projection plane and is in the groove shape The guide portion is disposed in a fitted state and is opposed to the lift body, and is disposed closer to the end of the hoistway than the end position of the lift stroke, and the groove shape of the frame body A friction plate disposed on both sides of the guide portion of the guide rail, and a pressing body that is held on one side by the groove-shaped side wall of the frame and presses the friction plate by the other side. A braking device for an elevator in which the frame body is pushed and moved by the elevating body that excessively moves up and down.   A guide rail that is erected on a hoistway and that is vertically engaged in a hoistway that moves up and down in the hoistway is formed, and a guide portion of the guide rail is formed in a groove shape on the horizontal projection plane. A frame body that is disposed in a fitted state and mounted on the lifting body, a friction plate that is provided in a groove shape of the frame body and that is disposed on each side of the guide portion of the guide rail, and the frame body An elevator braking device comprising: a pressing body that is held on one side by a groove-shaped side wall and presses the friction plate by the other side, and brakes the vertical displacement of the lifting body.   The elevator braking device according to claim 1, further comprising a screw mechanism that compresses the pressing body.   The elevator braking device according to any one of claims 1 to 3, wherein the pressing body is made of a compression coil spring.   The elevator braking device according to any one of claims 1 to 3, wherein the pressing body is made of a rubber piece.

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