JP6238270B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus in which a handrail device is provided on an upper surface of a car.

  In the conventional elevator apparatus, a pair of side handrails and a rear handrail are provided on the upper surface of the car. The side handrail and the back handrail can be displaced between a state of being laid on a car and a state of being stood (see, for example, Patent Document 1).

Japanese Patent No. 4220464

  In the conventional elevator apparatus as described above, an operator gets on the car and raises the side rails and the rear rails, but when the gap between the car and the hoistway wall is large (for example, 300 mm or more). May be required to keep the handrail constantly so that the operator does not fall into the hoistway from the gap. Further, when the horizontal distance from the handrail to the hoistway wall is large (for example, 500 mm or more), it is required to increase the height of the handrail (for example, 1100 mm or more) so that an operator does not accidentally get over the handrail. May be.

  On the other hand, at the top of the hoistway, in order to prevent the handrail from colliding with the hoistway ceiling even if the car runs away upward and the counterweight collides with the shock absorber of the hoistway pit A margin dimension, that is, an overhead dimension is secured. On the other hand, for example, when a handrail with a height of 1100 mm is permanently installed on the car, it is not preferable because the overhead dimension needs to be increased by 400 mm as compared with a case where a handrail with a height of 700 mm is permanently installed.

  In addition, there is a method of installing a fall prevention plate on the hoistway wall so as to reduce the horizontal distance from the handrail to the hoistway wall, but the equipment cost and the installation cost are increased.

  The present invention has been made to solve the above-described problems, and provides an elevator apparatus that can secure the necessary height dimension of a handrail apparatus while suppressing an increase in overhead dimension and an increase in cost. For the purpose.

  An elevator apparatus according to the present invention has a car upper surface, and includes a car that moves up and down in a hoistway, a handrail base fixed to the car upper surface, and a handrail movable part connected to the handrail base. The handrail movable portion is movable up and down relative to the handrail base between a normal position protruding upward from the handrail base and a lowered position that is a position lowered from the normal position. A holding mechanism that mechanically holds the handrail moving portion in a normal position is provided between the base and the handrail moving portion, and the holding mechanism is a release for releasing the holding of the handrail moving portion by the holding mechanism. A lever is provided above the top floor landing floor in the hoistway. When the car rises beyond the normal range of movement, it moves against the release lever and displaces the release lever. Maintenance of moving parts of handrail Actuating member is provided for lowering the lowered position the handrail moving part is released.

  In the elevator apparatus according to the present invention, when the car rises beyond the normal movement range, the operating member hits the release lever and displaces the release lever, thereby releasing the holding of the handrail movable portion by the holding mechanism. Since it is lowered from the normal position to the lowered position, the necessary height dimension of the handrail device can be ensured while suppressing an increase in overhead dimension and an increase in cost.

It is a front view which shows the principal part of the elevator apparatus by Embodiment 1 of this invention. It is a top view which shows the elevator apparatus of FIG. It is a front view which shows the state which the handrail movable part of FIG. 1 displaced to the descending position. It is a front view which shows a part of handrail apparatus of FIG. FIG. 5 is a left side view of FIG. 4. It is a front view which shows the state which the handrail movable part of FIG. 4 displaced to the descending position. FIG. 7 is a left side view of FIG. 6. It is a top view which shows the holding mechanism of FIG. It is sectional drawing which follows the IX-IX line of FIG. FIG. 10 is a cross-sectional view showing a state when the release lever of FIG. 9 is rotated by hitting a cam. It is a front view which shows a part of handrail apparatus of the elevator apparatus by Embodiment 2 of this invention. It is a left view of FIG. It is a front view which shows the state which the handrail movable part of FIG. 11 displaced to the descending position. FIG. 14 is a left side view of FIG. 13. It is a front view which shows the structure which abbreviate | omitted the tension spring of FIG. It is a top view which shows the 1st modification of a holding mechanism. It is a side view which shows the 2nd modification of a holding mechanism. It is a side view which shows the 3rd modification of a holding mechanism. It is a side view which shows a state when the handrail movable part of FIG. 18 is displaced to a lowered position.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a front view showing a main part of an elevator apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a plan view showing the elevator apparatus of FIG. In the figure, a car 1 and a counterweight 2 are suspended in a hoistway 3 by a suspension (not shown), and are moved up and down in the hoistway 3 by a driving force of a hoisting machine (not shown). .

  As the suspension body, a plurality of ropes or a plurality of belts are used. The hoisting machine has a drive sheave, a hoisting machine motor that rotates the driving sheave, and a hoisting machine brake that brakes the rotation of the driving sheave. The suspension is wound around the drive sheave.

  In the hoistway 3, a pair of car guide rails 4 a and 4 b that guide the raising and lowering of the car 1 and a pair of counterweight guide rails 5 a and 5 b that guide the raising and lowering of the counterweight 2 are installed.

  The car 1 has a horizontal car upper surface 1a. A handrail device 6 is provided on the upper surface 1a of the car. In this example, the handrail device 6 is erected along the left and right edges and the rear edge of the car upper surface 1a.

  The handrail device 6 includes a handrail base (lower handrail) 7 fixed to the car upper surface 1 a and a handrail movable part (upper handrail) 8 connected to the handrail base 7. The handrail movable portion 8 can move up and down with respect to the handrail base portion 7 between a normal position protruding upward from the handrail base portion 7 and a lowered position that is a position lowered from the normal position.

  FIG. 1 shows a state where the handrail movable portion 8 is located at the normal position, and FIG. 3 shows a state where the handrail movable portion 8 is displaced (dropped) to the lowered position. The overall height of the handrail device 6 is variable by moving the handrail movable portion 8 up and down. That is, the height dimension of the handrail device 6 as a whole can be reduced by displacing the handrail movable portion 8 from the normal position to the lowered position.

  In the state where the handrail movable portion 8 is located at the normal position, the height dimension of the handrail device 6 is such that the operator does not accidentally get over the handrail device 6 and move to the outside of the handrail device 6 (for example, 1100 mm or more). ). Further, in the state where the handrail movable portion 8 is displaced to the lowered position, the height dimension of the handrail device 6 is kept smaller than when the handrail movable portion 8 is located at the normal position (for example, 700 mm or less).

  Between the handrail base portion 7 and the handrail movable portion 8, a plurality of (in this example, a pair of left and right) holding mechanisms 9 that mechanically hold the handrail movable portion 8 at a normal position are provided. Each holding mechanism 9 is provided with a release lever 10 for releasing the holding of the handrail movable portion 8 by the holding mechanism 9.

  When the handrail movable portion 8 is located at the normal position, the release lever 10 projects horizontally from the handrail base portion 7 to the outside of the handrail device 6. Further, the release lever 10 protrudes to the outside of the car 1 when viewed from directly above. When the tip of the release lever 10 is pushed down from this state and the release lever 10 rotates (displaces), the holding mechanism 9 releases the holding of the handrail movable portion 8.

  A plurality of cams 11 (a pair in this example) as operating members are provided above the uppermost landing floor in the hoistway 3. The cam 11 is configured to release the holding of the handrail movable portion 8 by the holding mechanism 9 by rotating the release lever 10 when it hits the corresponding release lever 10 when the car 1 rises beyond the normal movement range. 8 is lowered to the lowered position.

  The position of the car 1 when the cam 11 hits the release lever 10 is, for example, the position where the uppermost floor landing position has passed upward by a set distance (for example, 50 mm), or the top of the hoistway and the upper end of the handrail device 6 (handrail movable part) 8 can be set at a position where the gap between the upper end 8 and the upper end 8 in a state where it is positioned at the normal position becomes a set dimension (for example, 300 mm).

  Further, as shown in FIG. 2, the cam 11 is attached to the car guide rails 4a and 4b via support members 12, respectively. Each support member 12 is disposed horizontally and parallel to the front-rear direction of the car 1 (the vertical direction in FIG. 2). As a result, the cam 11 is disposed behind the car guide rails 4 a and 4 b in the front-rear direction of the car 1.

  At a position corresponding to the uppermost floor in the hoistway 3, a fall prevention plate (screen) 13 that prevents the operator from dropping from the car upper surface 1 a into the hoistway 3 is provided. The fall prevention plate 13 faces the hoistway 3 so as to oppose at least one of the car 1 and the handrail device 6 when the car 1 is stopped at a position where the car 1 can be boarded from the top floor landing. It is partially provided inside.

  4 is a front view showing a part of the handrail device 6 of FIG. 1, FIG. 5 is a left side view of FIG. 4, and FIG. 6 is a front view showing a state in which the handrail movable portion 8 of FIG. 7 is a left side view of FIG. The handrail base 7 has a plurality of lower columns 7a that are vertically set on the upper surface 1a of the car. The handrail movable portion 8 has a plurality of upper struts 8a connected to the corresponding lower struts 7a.

  The lower end portion of the upper column 8a is inserted into the lower column 7a. When the handrail movable portion 8 is displaced from the normal position to the lowered position, the upper column 8a is lowered along the lower column 7a, and the amount of insertion of the upper column 8a into the lower column 7a is increased. That is, the lower support column 7 a functions as a guide unit that guides the vertical movement of the handrail movable unit 8.

  Between the handrail base portion 7 and the handrail movable portion 8, a plurality of (only one is shown in the drawing) tension springs 14 that pull the handrail movable portion 8 toward the lowered position side are provided. When the holding of the handrail movable portion 8 by all the holding mechanisms 9 is released, the handrail movable portion 8 is displaced to the lowered position by its own weight and the restoring force of the tension spring 14.

  The handrail base portion 7 is provided with a detection switch 15 that detects that the handrail movable portion 8 is located at the lowered position. The detection switch 15 is directly mechanically operated by the handrail moving portion 8 when the handrail moving portion 8 is displaced to the lowered position. When the detection switch 15 is operated, normal operation (automatic operation) of the car 1 becomes impossible.

  8 is a plan view showing the holding mechanism 9 of FIG. 1, FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 8, and FIG. 10 is a cross-sectional view showing a state when the release lever 10 of FIG. FIG. The holding mechanism 9 includes a frame 21, a latch bar 22 as a latch member, a push spring 23, a lever shaft 24, a pin 25, and a release lever 10.

  The frame 21 is fixed to the corresponding lower column 7a. The latch bar 22 is supported by the frame 21 so as to be slidable in the horizontal direction. The leading end of the latch bar 22 protrudes from the frame 21.

  The lower support column 7a is provided with a hole into which the tip of the latch bar 22 is inserted. At the normal time, the tip of the latch bar 22 is inserted into the lower column 7a. When the handrail movable portion 8 is located at the normal position, the corresponding upper column 8 a is supported on the tip of the latch bar 22. That is, the latch bar 22 prevents the handrail movable portion 8 from being displaced to the lowered position.

  The push spring 23 is interposed between the frame 21 and the latch bar 22 and presses the latch bar 22 in a direction to be inserted into the lower column 7a. The lever shaft 24 is rotatably supported by the frame 21. The release lever 10 is fixed to one end of the lever shaft 24 and rotates integrally with the lever shaft 24.

  The lever shaft 24 is provided with a pair of protrusions 24a and 24b protruding outward in the radial direction. The pin 25 is fixed between the protrusions 24a and 24b. Further, an intermediate portion of the pin 25 passes through the latch bar 22.

  When the tip of the release lever 10 is pushed down by the cam 11, the lever shaft 24 rotates counterclockwise in FIG. 9, and the latch rod 22 moves to the left in FIG. 9 while compressing the push spring 23. Thereby, the protruding amount of the latch bar 22 from the frame 21 is reduced, and the latch bar 22 is pulled out from the lower column 7a, that is, pulled out from under the lower column 7a, and the displacement of the handrail movable portion 8 to the lowered position is prevented. Is released.

  In such an elevator apparatus, if the car 1 is positioned within the normal movement range, the handrail movable portion 8 is positioned at the normal position, and the height of the handrail apparatus 6 is determined by the operator by mistake. The size can be such that it does not get over the device 6 and move to the outside of the handrail device 6. Therefore, even when the horizontal distance from the handrail device 6 to the hoistway wall is large, it is not necessary to install a fall prevention plate on almost the entire hoistway wall, and an increase in cost can be suppressed.

  Further, when the car 1 rises beyond the normal movement range, the handrail movable portion 8 is displaced to the lowered position, and the height dimension of the handrail device 6 is lowered, so that an increase in overhead dimension can be suppressed. , Space can be saved.

  Thus, according to the elevator apparatus of Embodiment 1, it is possible to secure the necessary height dimension of the handrail device 6 during maintenance work on the car upper surface 1a while suppressing an increase in overhead dimension and an increase in cost. it can.

  When the car 1 rises beyond the normal movement range and the handrail movable part 8 is displaced to the lowered position, the operator manually lowers the car 1 and gets into the car upper surface 1a from the top floor landing. And the handrail movable part 8 is pulled up to a normal position. At this time, in a state where the car 1 is stopped at a position where the car can enter the car upper surface 1a from the landing on the top floor, the fall prevention plate 13 is disposed between the car 1 and the hoistway wall. Even when the horizontal distance between the device 6 and the hoistway wall is large (for example, 500 mm or more), the operator is prevented from falling into the hoistway 3.

  Furthermore, the increase in cost can be suppressed by limiting the installation range of the fall prevention plate 13 to only the portion corresponding to the landing on the top floor.

Embodiment 2. FIG.
11 is a front view showing a part of a handrail device of an elevator apparatus according to Embodiment 2 of the present invention, and FIG. 12 is a left side view of FIG. The handrail device according to the second embodiment includes a plurality of handrail bases (lower struts) 31 standing vertically on a car upper surface 1a, and a plurality (only one is shown) of flat plates connected to the handrail base 31. And a handrail movable portion (upper handrail) 32 in the form of a hand.

  The upper end portion of the handrail movable portion 32 is bent at a right angle to the side opposite to the edge portion of the car upper surface 1a. The lower end portion of the handrail movable portion 32 is bent at a right angle toward the edge portion of the car upper surface 1a. The handrail movable portion 32 is provided with a pair of guide holes 32a that are long in the vertical direction. A plurality of guide pins 33 inserted into the corresponding guide holes 32a are fixed to each handrail base 31.

  The handrail movable portion 32 is guided by the guide pin 33 and can move up and down relative to the handrail base portion 31 between a normal position protruding upward from the handrail base portion 31 and a lowered position which is a position lowered from the normal position. It has become. 11 and 12 show a state where the handrail movable portion 32 is located at the normal position, and FIGS. 13 and 14 show a state where the handrail movable portion 32 is displaced to the lowered position. The overall height of the handrail device is variable as in the first embodiment by moving the handrail movable portion 32 up and down.

  Between the handrail base portion 31 and the handrail movable portion 32, a plurality (only one is shown) holding mechanisms 34 that mechanically hold the handrail movable portion 32 at a normal position are provided. Each holding mechanism 34 includes a support portion 35 fixed to the corresponding handrail base portion 31 and a release lever 36 that is rotatably provided on the support portion 35.

  The release lever 36 has a first end 36a and a second end 36b. When the handrail movable portion 32 is located at the normal position, the first end portion 36a protrudes horizontally from the handrail base portion 31 to the outside of the handrail device. Further, the first end portion 36a protrudes to the outside of the car 1 when viewed from directly above. Further, when the handrail movable portion 32 is located at the normal position, the lower end portion of the handrail movable portion 32 is supported on the second end portion 36b.

  From this state, when the tip of the release lever 36 is pushed downward by the cam 11 and the release lever 36 rotates (displaces) counterclockwise in FIG. 13, the second end portion 36 b is pulled out from under the handrail movable portion 32. The holding of the handrail movable part 32 by the holding mechanism 34 is released.

  A plurality of (only one is shown in the figure) tension springs 37 are provided between the lower end of the handrail movable portion 32 and the car upper surface 1a to pull the handrail movable portion 32 toward the lowered position. When the holding of the handrail movable portion 32 by all the holding mechanisms 34 is released, the handrail movable portion 32 is displaced to the lowered position by its own weight and the restoring force of the tension spring 37.

  The handrail base 31 is provided with the same detection switch 15 as in the first embodiment. The detection switch 15 is mechanically directly operated by the upper end portion of the handrail movable portion 32 when the handrail movable portion 32 is displaced to the lowered position. Other configurations and operations are the same as those in the first embodiment.

  As described above, even in the handrail device using the flat handrail movable portion 32, the same effect as in the first embodiment can be obtained.

In the first and second embodiments, the handrail movable parts 8 and 32 are lowered to the lowered position by the pulling springs 14 and 37. However, when the displacement to the lowered position is sufficiently possible only by the weight of the handrail movable part, for example, As shown in FIG. 15, the tension springs 14 and 37 may be omitted.
Further, a weight may be added to the handrail movable portions 8 and 32 in place of or in addition to the tension springs 14 and 37.

  Furthermore, the specific configuration of the holding mechanism is not limited to the first and second embodiments. For example, FIG. 16 is a plan view showing a first modification of the holding mechanism. In this example, the lever shaft 24 and the release lever 10 of the two sets of holding mechanisms 9 are shared, and the two latch rods 22 slide simultaneously (two-point operation) by the displacement of one release lever 10. Yes.

  FIG. 17 is a side view showing a second modification of the holding mechanism, and shows a state when the handrail movable portion 8 is displaced to the lowered position. The holding mechanism 41 in FIG. 17 includes a support portion 42, a release lever 43, a roller 44, and a latch pin 45 as a latch member. The support part 42 is fixed to the corresponding lower column 7a.

  The release lever 43 includes a linear first portion 43a and a linear second portion 43b that forms an obtuse angle with respect to the first portion 43a. Further, the release lever 43 is rotatably connected to the support portion 42 at a connecting portion between the first portion 43a and the second portion 43b.

  The roller 44 is rotatably provided at the lower end portion of the release lever 43 (the end portion of the first portion 43a opposite to the second portion 43b). The latch pin 45 is connected to the upper end portion of the release lever 43 (the end portion of the second portion 43b opposite to the first portion 43a).

  The lower support column 7a is provided with a hole into which the latch pin 45 is inserted. Normally, the latch pin 45 is inserted into the lower support column 7a. When the handrail movable portion 8 is located at the normal position, the corresponding upper column 8 a is supported on the tip of the latch pin 45.

  When the roller 44 hits the cam 11, the lower end portion of the release lever 10 is pushed down by the cam 11, and the release lever 43 rotates counterclockwise in FIG. Thereby, the latch pin 45 is pulled out from the lower column 7a, and the prevention of the displacement of the handrail movable portion 8 to the lowered position is released.

  FIG. 18 is a side view showing a third modification of the holding mechanism, and FIG. 19 is a side view showing a state when the handrail movable portion of FIG. 18 is displaced to the lowered position. In this example, the release lever 10 of the first embodiment includes an upper lever 10a provided on the handrail device 6 above the car upper surface 1a, and a lower lever provided on the car 1 below the car upper surface 1a. It is divided into 10b. The upper lever 10a and the lower lever 10b are connected by a connecting member 46. The connecting member 46 displaces the upper lever 10a in conjunction with the displacement of the lower lever 10b. As the connection member 46, a link rod or a wire is used.

  When the car 1 rises beyond the normal movement range, the upper lever 10a does not hit the cam 11 and the lower lever 10b hits the cam 11 and rotates. At this time, the upper lever 10a rotates together with the lower lever 10b.

  With such a configuration, the installation position of the cam 11 can be made lower than that in the first embodiment, and the degree of freedom in layout is improved. Further, the configuration in which the release lever is divided into upper and lower parts in this way can be applied to the holding mechanisms 34 and 41.

In the above example, the handrail device is erected across the left and right edges and the rear edge of the car upper surface 1a. However, the position where the handrail device is erected is not limited to this. For example, when the gap between the back surface of the car 1 and the hoistway wall is sufficiently small, the rear handrail device can be omitted.
Moreover, the height dimension does not necessarily need to be variable throughout the handrail device. For example, when the horizontal distance from the rear handrail device to the hoistway wall is small, the height dimension of the rear handrail device may be kept low instead of being variable.
Furthermore, in the above example, a configuration in which the handrail movable portion slides in the vertical direction is shown, but a configuration in which the handrail movable portion rotates (bends and extends) with respect to the handrail base portion and moves up and down may be employed.
Furthermore, for example, when the worker does not move on the car upper surface 1a and the handrail movable part can be returned to the normal position from the landing, it is not necessary to install a fall prevention plate in the hoistway.
Further, the operating member is not limited to a cam.
Furthermore, the present invention can be applied to various types of elevator apparatuses. For example, the present invention includes a 1: 1 roping elevator device, a 2: 1 roping elevator device, an elevator device having a machine room above the hoistway, a multi-car elevator device, or a double deck elevator device. Etc.

Claims (5)

A handrail device having a car upper surface, a car that moves up and down in a hoistway, a handrail base fixed to the car upper surface, and a handrail movable part connected to the handrail base,
The handrail movable portion is movable up and down relative to the handrail base between a normal position protruding upward from the handrail base and a lowered position that is a position lowered from the normal position,
Between the handrail base portion and the handrail movable portion, a holding mechanism for mechanically holding the handrail movable portion at the normal position is provided,
The holding mechanism is provided with a release lever for releasing the holding of the handrail movable part by the holding mechanism,
Above the uppermost landing floor in the hoistway, when the car rises beyond the normal movement range, the handrail by the holding mechanism is displaced by hitting the release lever and displacing the release lever. An elevator apparatus provided with an operating member for releasing the holding of the movable part and lowering the handrail movable part to the lowered position. The holding mechanism has a latch member that is inserted into the handrail base and supports the handrail movable portion located at a normal position;
The elevator apparatus according to claim 1, wherein the latch member is pulled out from below the handrail movable portion when the release member is displaced when the operating member hits the release lever. The release lever has a first end and a second end,
When the handrail movable portion is located at the normal position, the first end portion protrudes from the handrail base portion to the outside of the handrail device, and the handrail movable portion is supported on the second end portion. And
The elevator apparatus according to claim 1, wherein when the operating member hits the release lever, the release lever rotates and the second end portion is pulled out from under the handrail movable portion. A fall prevention plate provided in the hoistway to prevent the operator from falling from the upper surface of the car into the hoistway;
The fall prevention plate is disposed in the hoistway so as to face at least one of the car and the handrail device when the car is stopped at a position where the car can be entered from the landing on the top floor to the car upper surface. The elevator apparatus according to any one of claims 1 to 3, wherein the elevator apparatus is partially provided on the elevator. The handrail base is provided with a detection switch for detecting that the handrail movable part is located at the lowered position,
The elevator apparatus according to any one of claims 1 to 4, wherein when the detection switch is operated, normal operation of the car is disabled.

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