JP2017218253A - Roller guide device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a roller guide device 1 into a small and simple structure.SOLUTION: A roller guide device 1 includes three roller guides 13 disposed on a base plate 11. Each roller guide 13 includes: a fixed bracket 21 forming a substantially U shape; a movable bracket 23 supported by the fixed bracket 21 through a swing shaft 22 and forming a substantially U shape; and a guide roller 25 which is rotatably supported by the movable bracket 23 through a roller shaft 24 and has a disk-like shape. A coil spring 26 is disposed in a compression state between a bottom wall 21a of the fixed bracket 21 and a bottom wall 23a of the movable bracket 23. A stopper 27 which restricts excessive displacement of the guide roller 25 is provided on a side surface of the movable bracket 23.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a roller guide device for guiding an elevator car along a guide rail.

  The elevator car is guided by the guide rails in the hoistway and moves up and down, but the guide mechanism for the guide rails is a relatively simple sliding type that uses a shoe that slides on the guide rails. A guide shoe device and a roller guide device using a guide roller that rolls while being pressed against a guide rail are known.

  In general, as disclosed in Patent Document 1, Patent Document 2, and the like, a roller guide device is provided with an arm on a base plate attached to a cage so as to be swingable via a bracket, and a so-called tip is provided at the tip of the arm. The roller shaft is supported in a cantilever manner. The disk-shaped guide roller is rotatably supported by the roller shaft, and an outer peripheral portion made of rubber or the like is disposed to face the surface of the guide rail. An urging mechanism using a coil spring is provided so that the guide roller is pressed against the guide rail with an appropriate urging force. The urging mechanism includes a spring support bolt provided so as to penetrate the arm along the swinging direction of the arm, and a coil spring is fitted to and supported by the spring support bolt. The coil spring is disposed in a compressed state between the nut and the arm at the end of the spring support bolt. That is, the coil spring is disposed so that the central axis of the coil spring is parallel to the diameter line of the disk-shaped guide roller and perpendicular to the longitudinal direction of the guide rail.

JP 2001-525307 A JP 2005-82264 A

  In the conventional roller guide device as described above, the coil spring extending perpendicular to the longitudinal direction of the guide rail is positioned in parallel with the disc-shaped guide roller. The projected area when viewed along the longitudinal direction is increased. In addition, since the mounting holes for mounting the base plate to the car need to be arranged while avoiding interference with the coil spring and the arm, the outer shape of the base plate is increased in size.

  In addition, the bracket that supports the base end of the spring support bolt is required closer to the guide rail than the center of rotation of the guide roller. Inevitably, the diameter of the guide roller increases. That is, it has been difficult to reduce the diameter of the guide roller in order to reduce the size of the roller guide device.

  An object of the present invention is to provide a roller guide device that has a simple configuration and can be miniaturized.

The present invention is a roller guide device for an elevator comprising a base plate attached to an elevator car and a roller guide disposed on the base plate,
The roller guide is
A fixed bracket that is attached to the base plate and has a substantially U-shape with a pair of support pieces rising from the bottom wall;
A swing shaft supported at both ends by a pair of support pieces of the fixed bracket;
A movable bracket which is supported by the fixed bracket via the swing shaft so as to be swingable, and has a substantially U shape in which a pair of support pieces rises from both sides of the bottom wall;
A roller shaft supported at both ends by a pair of support pieces of the movable bracket;
A guide roller rotatably supported via the roller shaft;
A coil spring disposed in a compressed state between the bottom wall of the fixed bracket and the bottom wall of the movable bracket, and biasing the movable bracket along a swinging direction in which the guide roller approaches the guide rail;
It has.

  That is, the roller guide according to the present invention is configured such that a substantially U-shaped movable bracket is combined with a substantially U-shaped fixed bracket, and a guide roller is disposed inside the substantially U-shaped movable bracket. It has a configuration. The movable bracket is swingably supported via a swing shaft supported at both ends by a fixed bracket, and the guide roller is rotatably supported by a roller shaft supported at both ends by the movable bracket. Yes. Since the coil spring is disposed between the bottom wall of the fixed bracket and the bottom wall of the movable bracket, the central axis of the coil spring is substantially perpendicular to the surface of the base plate, and the fixed bracket and the movable bracket. The coil spring and the coil spring overlap each other. Therefore, the projected area when viewed along a direction orthogonal to the surface of the base plate can be reduced.

  In addition, the roller shaft can be supported relatively close to the guide rail, and the guide roller can be reduced in diameter accordingly.

  In a preferred aspect of the present invention, when the guide roller is vertically projected onto the base plate, at least a part of the coil spring overlaps the projection surface of the guide roller.

  In the present invention, the number of roller guides is not necessarily limited, and is appropriately provided according to the shape or configuration of the target guide rail. In one aspect of the present invention, three roller guides are disposed on the base plate corresponding to a typical T-shaped guide rail.

  In a preferred aspect of the present invention, a bolt rising from the bottom wall of the fixed bracket so as to regulate the maximum swing position of the movable bracket in the swing direction in which the guide roller approaches the guide rail; And a nut screwed into the tip of the bolt passing through the bottom wall of the movable bracket, and the bolt is inserted through the inner periphery of the coil spring. Therefore, the bolt serves as a support or guide for the coil spring and a stopper for restricting the maximum extension position of the coil spring (that is, the maximum swinging position of the movable bracket).

  In a preferred aspect of the present invention, the swing shaft is disposed at one end of the fixed bracket near the guide rail, the coil spring is disposed at the other end, and the roller shaft is When projected perpendicularly on the base plate, it is located between the swing shaft and the coil spring.

  Furthermore, in one preferable aspect of the present invention, the movable bracket includes a stopper support portion that protrudes outward from the support piece of the fixed bracket, and a distal end portion of the stopper bracket faces the base plate. A rod-shaped stopper is attached. The stopper abuts against the base plate at a predetermined swing position of the movable bracket when the guide roller is pushed by the guide rail due to the swing of the car or the like, and suppresses excessive swing of the movable bracket.

  According to the present invention, the outer dimensions of the entire roller guide device, in particular, the projected area when viewed along the direction orthogonal to the surface of the base plate can be reduced, and the roller shaft is disposed close to the guide rail. The diameter of the guide roller can be reduced.

  In addition, since both the swing shaft and the roller shaft are supported at both ends, the support strength of the guide roller can be ensured without excessively increasing the size of the fixed bracket, movable bracket, etc. It is possible to reduce the size and weight of the roller guide device while suppressing the above.

  Further, since the coil spring is disposed between the bottom walls of both brackets, the configuration is simpler than the conventional configuration.

The perspective view of the cage | basket | car of an elevator provided with the roller guide apparatus. The perspective view which shows 1st Example of a roller guide apparatus. The disassembled perspective view of one roller guide. The perspective view of the state which attached the one roller guide on the baseplate. The perspective view of the roller guide apparatus of 2nd Example. The exploded perspective view of one roller guide in the 2nd example. The perspective view of the state which attached the one roller guide in 2nd Example on the baseplate.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an elevator car 2 provided with a roller guide device 1 according to the present invention. A car 2 that moves up and down in a hoistway (not shown) is composed of a car frame 3 configured in a rectangular shape and a car room 4 supported by the car frame 3, and is provided on the left and right sides of the hoistway. With respect to the pair of guide rails 5, roller guide devices 1 are provided at two places (four places in total) on the left and right sides of the car frame 3. These four roller guide devices 1 have basically the same configuration.

  FIG. 2 is a perspective view showing a first embodiment of the roller guide device 1 according to the present invention. For example, the roller guide device 1 attached to the upper surface of the car frame 3 in FIG. 1 is shown. As shown in the figure, the guide rail 5 is a general T-shaped guide rail in which the attachment portion 6 and the rail portion 7 are integrated so as to form a T-shaped cross section. The roller guide device 1 includes a base plate 11 having a notch portion 12 (see FIGS. 3 and 4) into which the rail portion 7 of the guide rail 5 enters, in the center of the front edge 11 a, and 3 disposed on the base plate 11. One roller guide 13, specifically, a pair of side roller guides 13A, 13B facing the side surfaces 7a, 7b of the rail portion 7 and one top roller guide 13C facing the top surface 7c of the rail portion 7. I have. These three roller guides 13 are disposed so as to surround the notch 12 of the base plate 11. The three roller guides 13 basically have the same configuration, and more specifically, the two side roller guides 13A and 13B are configured to be symmetric with respect to the rail portion 7, The top roller guide 13C has the same configuration as one of the side roller guides 13A and 13B, for example, the side roller guide 13A.

  Hereinafter, the configuration of each roller guide 13 will be described in detail by taking the side roller guide 13A as an example. 3 is an exploded perspective view of the roller guide 13 (side roller guide 13A), and FIG. 4 shows a state in which only this one roller guide 13 is assembled on the base plate 11. As shown in FIG.

  The roller guide 13 includes a fixed bracket 21 attached to the base plate 11, a swing shaft 22 supported on both ends of the fixed bracket 21, and a movable supported swingably on the fixed bracket 21 via the swing shaft 22. A bracket 23, a roller shaft 24 supported on both ends of the movable bracket 23, a disk-shaped guide roller 25 rotatably supported via the roller shaft 24, and the guide roller 25 are appropriately attached to the guide rail 5. A coil spring 26 that urges the movable bracket 23 along a predetermined swinging direction so as to come into pressure contact with an urging force, and conversely, an excessive displacement of the guide roller 25 when the guide roller 25 is pushed by the guide rail 5. And a stopper 27 for restricting the movement.

  The fixed bracket 21 is formed of a press-formed product of a steel plate and has a substantially U shape in which a pair of support pieces 21b rises at right angles from both sides of a substantially rectangular bottom wall 21a. The fixing bracket 21 is disposed on the base plate 11 in such a posture that the longitudinal direction of the bottom wall 21a is orthogonal to the corresponding surface of the rail portion 7 (that is, the side surface 7a of the rail portion 7 in the case of the side roller guide 13A). The bottom wall 21 a is fixed to the base plate 11 with a plurality of (for example, two) bolts 31. And the circular bearing hole 32 is each formed in the edge part which becomes the notch part 12 side (namely, guide rail 5 side) of each support piece 21b. A metal bush 33 serving as a bearing member is fitted in the bearing hole 32, and both ends of the swing shaft 22 are rotatably supported via the metal bush 33. The base plate 11 is made of a relatively thick steel plate, and a screw hole 31a is processed in advance at a position where the bolt 31 is screwed. Further, the swing shaft 22 is prevented from coming off by a flanged bolt 22a that is screwed into a screw hole at the tip.

  Similar to the fixed bracket 21, the movable bracket 23 is made of a press-formed product of a steel plate, and has a substantially U shape in which a pair of support pieces 23b rises at right angles from both sides of a substantially rectangular bottom wall 23a. Here, each of the support pieces 21b has a substantially triangular shape that approximates an isosceles triangle whose apex angle is smaller than the other two angles, and a part of the portion corresponding to the bottom side is a side edge of the bottom wall 23a. It is continuous. A circular bearing hole 35 is formed at an end corresponding to one corner on the bottom side, and the bearing hole 35 is rotatably fitted to the swing shaft 22. Specifically, the bearing hole 35 is fitted to the outer peripheral surface of the metal bush 33 serving as a bearing member.

  In addition, in the edge part by the side in which the bearing hole 35 is provided, the bottom wall 23a does not exist, but is in the state cut out so that it may open toward the downward direction.

  A circular bearing hole 37 is also formed at a portion corresponding to the apex angle of the pair of support pieces 23b that form a substantially isosceles triangle, and the pair of bearing holes 37 allows the roller shaft 24 of the guide roller 25 to move. Both ends are supported. The roller shaft 24 is prevented from coming off by a flanged bolt 24a that is screwed into a screw hole at the tip.

  The disc-shaped guide roller 25 includes an annular elastic body portion 39 made of an elastic material such as rubber or elastomer on the outer peripheral surface, and this elastic body portion 39 is provided on the surface (side surface 7a, etc.) of the guide rail 5. Touch. The guide roller 25 is provided with a rolling bearing (not shown) formed of a ball bearing or a needle bearing at the center, and is rotatably supported by the roller shaft 24 via the rolling bearing. Therefore, the guide roller 25 is disposed in a shape sandwiched between the pair of support pieces 23b of the movable bracket 23, and is supported by the support pieces 23b on both sides.

  As described above, one end of the movable bracket 23 is swingably connected to one end of the fixed bracket 21 via the swing shaft 22, and the end of the movable bracket 23 opposite to the swing shaft 22 is fixed bracket. The bottom wall 23a of the movable bracket 23 is overlaid on the bottom wall 21a. A coil spring 26 is disposed in a compressed state between the bottom wall 21a of the fixed bracket 21 and the bottom wall 23a of the movable bracket 23 that overlap each other in this manner.

  Specifically, a spring support bolt 41 that passes through the bottom wall 21a of the fixing bracket 21 and is screwed into the screw hole 41a of the base plate 11 is erected from the bottom wall 21a so as to be perpendicular to the surface of the base plate 11. A coil spring 26 is fitted around the spring support bolt 41. In other words, the spring support bolt 41 is inserted through the inner periphery of the coil spring 26. Therefore, the coil spring 26 has a posture in which the central axis is orthogonal to the surface of the base plate 11. A disk-shaped shim 42 for adjusting the spring force of the coil spring 26 is interposed between the end of the coil spring 26 and the bottom wall 21 a of the fixing bracket 21, and is attached to the spring support bolt 41. The nut 43 to be screwed is tightened from above the shim 42 to prevent the spring support bolt 41 from loosening.

  The tip of the spring support bolt 41 passes through a circular hole 45 formed in the bottom wall 23a of the movable bracket 23, and a pair of nuts 46 are attached in the form of a so-called double nut. The nut 46 abuts against the bottom wall 23a of the movable bracket 23 when the movable bracket 23 swings with the urging force of the coil spring 26, and regulates the swing of the movable bracket 23. That is, the maximum swing position of the movable bracket 23 in a state where the guide roller 25 is not in contact with the guide rail 5 is adjusted by the mounting position of the nut 46. Therefore, the spring support bolt 41 serves as a support or guide for the coil spring 26 and a stopper for restricting the maximum extension position of the coil spring 26 (that is, the maximum swinging position of the movable bracket 23). Yes.

  Moreover, in the first embodiment shown in FIGS. 2 to 4, the stopper support piece 23 c, which is continuous with the bottom wall 23 a of the movable bracket 23 and protrudes in a trapezoidal shape outward from the one support piece 21 b of the fixed bracket 21, is provided. It is integrally formed. A screw hole 48 is formed in the stopper support piece 23 c serving as a stopper support portion, and a rod-like stopper 27 is attached to the screw hole 48. Specifically, the stopper 27 is a substantially cylindrical stopper portion made of an elastic material such as a rubber or urethane provided on a head at the lower end of the bolt-shaped stem 27a having a thread that is screwed into the screw hole 48. 27b, and the mounting position of the stopper support piece 23c is adjusted so that the spherical end surface of the stopper portion 27b faces the surface of the base plate 11 with a predetermined gap. The stem 27a is prevented from loosening by tightening a nut 49 screwed to the stem 27a toward the stopper support piece 23c. The stopper 27 is usually separated from the surface of the base plate 11, but when the guide roller 25 is largely pushed by the guide rail 5 due to the swing of the elevator car 2, the stopper portion 27 b having elasticity is formed on the base plate 11. It abuts against the surface and restricts excessive swinging of the movable bracket 23 and thus excessive displacement of the car 2.

  In the reference state where the guide rail 5 is in contact with the guide rail 5, the bottom wall 21a of the fixed bracket 21 and the bottom wall 23a of the movable bracket 23 are substantially parallel as shown in FIG. . Accordingly, the stopper 27 is basically in a posture perpendicular to the surface of the base plate 11, and the stopper 27 and the central axis of the coil spring 26 are parallel to each other.

  Further, when the roller shaft 24 is projected perpendicularly to the base plate 11, the roller shaft 24 is located between the swing shaft 22 and the coil spring 26. That is, the disk-shaped guide roller 25 is disposed almost directly above the fixed bracket 21.

  Further, in the illustrated example, the distance from the center of the swing shaft 22 that is the swing center of the movable bracket 23 to the center of the roller shaft 24, and the point of application of the spring force of the coil spring 26 from the center of the swing shaft 22. The distance to the center of the hole 45 is set to be equal to each other. That is, as the rotational moment via the swing of the movable bracket 23, the length of the arm of the rotational moment input by the spring force and the length of the arm of the rotational moment applied to the guide roller 25 are equal to each other. Thereby, setting or adjustment of the load of the coil spring 26 is facilitated.

  The individual roller guides 13 are configured as described above. As described above, the three roller guides 13 (the side roller guides 13A and 13B and the top roller guide 13C) are mounted on the base plate 11. It has been. The base plate 11 is provided with a plurality of mounting holes 50 (for example, four) for mounting on the car frame 3 at positions not covered by the three roller guides 13. As shown in FIG. 2, the pair of side roller guides 13 </ b> A and 13 </ b> B are disposed on both sides of the notch 12 so that the fixing brackets 21 are along the front edge 11 a of the base plate 11. And the stopper 27 is each arrange | positioned so that it may become the opposite side to the front edge 11a. In the top roller guide 13C, it is arbitrary on which side the stopper 27 is arranged, but in the illustrated example, the arrangement is the same as that of the side roller guide 13A.

  In the roller guide device 1 configured as described above, the fixed bracket 21 and the movable bracket 23 each having a substantially U-shape are combined to support the guide roller 25 on both sides, so that the configuration is simple. At the same time, the outer dimensions of the individual roller guides 13 and the entire roller guide device 1 are reduced. In particular, the coil spring 26 is disposed between the bottom wall 21a of the fixed bracket 21 and the bottom wall 23a of the movable bracket 23 so as to be perpendicular to the base plate 11, and the fixed bracket 21, the movable bracket 23, and the coil spring are arranged. Therefore, the projected area when viewed along the direction perpendicular to the surface of the base plate 11 can be reduced. In the illustrated example, when the disk-shaped guide roller 25 is vertically projected onto the base plate 11, almost the entire coil spring 26 is covered with the projection surface of the guide roller 25. In other words, the coil spring 26 hardly protrudes outward from the three guide rollers 25, so that the configuration is small.

  Further, as compared with the case where the coil spring is disposed along the diameter direction of the guide roller as in the prior art, the roller shaft 24 can be supported close to the guide rail 5, and the smaller diameter of the guide roller 25 is accordingly increased. Is possible. By reducing the diameter of the guide roller 25, the individual roller guides 13 and the roller guide device 1 as a whole are further reduced in size.

  Since the configuration of the roller guide 13 disposed on the base plate 11 is small and simple, the mounting hole 50 formed in the base plate 11 can be disposed relatively close to the guide rail 5. The base plate 11 can be downsized.

  Further, since both the swing shaft 22 and the roller shaft 24 are supported at both ends, the support strength of the guide roller 25 is ensured without excessively increasing the size of the fixed bracket 21 and the movable bracket 23 or increasing the thickness thereof. It becomes easy. Also, by supporting both ends, the guide roller 25 is less likely to tilt when the guide roller 25 receives a load, and the roller guide device 1 can be reduced in size and weight while suppressing vibration due to the tilt of the guide roller 25. It is.

  In addition, since the stopper 27 is in direct contact with the base plate 11, the configuration is simple compared to a configuration in which the stopper load is received via another bracket or the like.

  The roller guide device 1 having such a small and simple configuration is suitable for use in a newly manufactured elevator, for example, during maintenance of an existing elevator using a sliding guide shoe device. It is also possible to replace the sliding type shoe shoe device. That is, according to this invention, the roller guide apparatus 1 can be reduced in size to such an extent that it can be arrange | positioned in the space of the existing sliding guide shoe apparatus.

  Next, FIGS. 5 to 7 show a second embodiment of the present invention in which the configuration of the stopper support portion provided on the movable bracket 23 is changed. In the second embodiment, a stopper support bracket 52 formed by bending a steel plate into an L shape is configured as a separate part from the movable bracket 23 as a stopper support portion. A stopper support bracket 52 is attached to the outer surface of one support piece 23 b of the movable bracket 23 via a plurality of bolts 53. The bolt 53 is screwed into a screw hole 53 a provided in the support piece 23 b of the movable bracket 23. Similar to the stopper support piece 23c of the first embodiment described above, the stopper support bracket 52 includes a screw hole 48 into which the stem 27a of the stopper 27 is screwed, and the stopper 27 is attached thereto.

  In the illustrated example, the movable bracket 23 is provided with screw holes 53a in both of the pair of support pieces 23b in order to share parts, and the stopper support bracket 52 is selectively used as one of the support pieces 23b. It is configured to be attached to.

DESCRIPTION OF SYMBOLS 1 ... Roller guide apparatus 2 ... Car 5 ... Guide rail 11 ... Base plate 13, 13A, 13B, 13C ... Roller guide 21 ... Fixed bracket 21a ... Bottom wall 21b ... Supporting piece 22 ... Swing shaft 23 ... Movable bracket 23a ... Bottom wall 23b ... support piece 23c ... stopper support piece 24 ... roller shaft 25 ... guide roller 26 ... coil spring 27 ... stopper 41 ... spring support bolt 52 ... stopper support bracket

Claims (6)

A roller guide device for an elevator comprising a base plate attached to a car that moves up and down, and a roller guide disposed on the base plate,
The roller guide is
A fixed bracket that is attached to the base plate and has a substantially U-shape with a pair of support pieces rising from the bottom wall;
A swing shaft supported at both ends by a pair of support pieces of the fixed bracket;
A movable bracket which is supported by the fixed bracket via the swing shaft so as to be swingable, and has a substantially U shape in which a pair of support pieces rises from both sides of the bottom wall;
A roller shaft supported at both ends by a pair of support pieces of the movable bracket;
A guide roller rotatably supported via the roller shaft;
A coil spring disposed in a compressed state between the bottom wall of the fixed bracket and the bottom wall of the movable bracket, and biasing the movable bracket along a swinging direction in which the guide roller approaches the guide rail;
Elevator roller guide device.   The roller guide device for an elevator according to claim 1, wherein three roller guides are disposed on the base plate in correspondence with the T-shaped guide rail. The bolt rising from the bottom wall of the fixed bracket and the bolt penetrating the bottom wall of the movable bracket so as to regulate the maximum swing position of the movable bracket in the swing direction in which the guide roller approaches the guide rail A nut screwed to the tip of the
The roller guide device for an elevator according to claim 1 or 2, wherein the bolt is inserted through an inner periphery of the coil spring. The swing shaft is disposed at one end of the fixed bracket near the guide rail, and the coil spring is disposed at the other end.
The roller guide for an elevator according to any one of claims 1 to 3, wherein the roller shaft is positioned between the swing shaft and the coil spring when vertically projected onto the base plate. apparatus.   The movable bracket includes a stopper support portion that projects outward from the support piece of the fixed bracket, and a rod-like stopper whose tip is opposed to the base plate is attached to the stopper support portion. The roller guide device for an elevator according to any one of claims 1 to 4.   The elevator roller according to any one of claims 1 to 5, wherein when the guide roller is vertically projected onto the base plate, at least a part of the coil spring overlaps with a projection surface of the guide roller. Guide device.

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