JP6716843B2 - Elevator roller guide device - Google Patents

Description

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

The elevator car is configured to move up and down by being guided by the guide rails in the hoistway, but the guide mechanism for the guide rails is a relatively simple sliding type that uses a shoe that makes sliding contact with 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.

Generally, a roller guide device is provided with a swingable arm via a bracket on a base plate attached to a car, as disclosed in Patent Document 1, Patent Document 2, etc. The roller shaft is supported in a cantilever manner. The disc-shaped guide roller is rotatably supported by the roller shaft, and the outer peripheral portion made of rubber or the like is arranged so as to face the surface of the guide rail. An urging mechanism using a coil spring is provided so that the guide roller can be pressed against the guide rail with an appropriate urging force. As this urging mechanism, a spring support bolt is provided so as to penetrate the arm along the swing 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 at the end of the spring support bolt and the arm. That is, the coil spring is arranged such that the central axis of the coil spring is parallel to the diameter line of the disk-shaped guide roller and is orthogonal to the longitudinal direction of the guide rail.

Tokuyo 2001-525307 JP, 2005-82264, A

In the conventional roller guide device as described above, since the coil springs extending orthogonally to the longitudinal direction of the guide rail are positioned in parallel with the disk-shaped guide roller, the outer dimensions of the entire roller guide device, particularly the guide rail The projected area becomes large when viewed along the longitudinal direction. Moreover, since the mounting hole for mounting the base plate on the car needs to be arranged while avoiding interference with the coil spring and the arm, the outer shape of the base plate becomes large.

In addition, since 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, the center of rotation of the guide roller (that is, the roller shaft) must be located relatively far from the guide rail. Therefore, the diameter of the guide roller is inevitably increased. That is, it is difficult to reduce the diameter of the guide roller in order to downsize the roller guide device.

An object of the present invention is to provide a roller guide device which has a simple structure and can be downsized.

The present invention is a roller guide device for an elevator including 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 steel plate is press-molded so that a pair of support pieces stand up from both sides of the bottom wall to form a substantially U shape , and the bottom wall is fixed to the base plate by a bolt located in the bottom wall. Bracket and
A swing shaft whose both ends are supported by the pair of support pieces of the fixed bracket,
A steel plate is press-molded so that a pair of support pieces stand up from both sides of the bottom wall to form a substantially U shape, and the pair of support pieces are swingably supported by the fixed bracket via the swing shaft. and the movable bracket,
A roller shaft having both ends supported by the pair of support pieces of the movable bracket,
A guide roller rotatably supported via the roller shaft,
A coil spring arranged in a compressed state between the bottom wall of the fixed bracket and the bottom wall of the movable bracket, and urging the movable bracket along the swing direction in which the guide roller approaches the guide rail,
Is equipped with.

That is, in the roller guide according to the present invention, a movable bracket having a substantially U shape is combined with an inner side of a fixed bracket having a substantially U shape, and the guide roller is arranged inside the movable bracket having a substantially U shape. It is composed. The movable bracket is swingably supported by a swing shaft whose both ends are supported by a fixed bracket, and the guide roller is rotatably supported by a roller shaft whose both ends are supported by the movable bracket. There is. Further, since the coil spring is arranged between the bottom wall of the fixed bracket and the bottom wall of the movable bracket, the central axis of the coil spring is in a direction substantially orthogonal to the surface of the base plate, and the fixed bracket and the movable bracket. The coil spring and the coil spring are arranged so as to overlap each other. Therefore, the projected area when viewed along the direction orthogonal to the surface of the base plate can be reduced.

Further, it becomes possible to support the roller shaft relatively close to the guide rail, and the diameter of the guide roller can be reduced accordingly.

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

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

Further, 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 to a tip end portion of the bolt penetrating the bottom wall of the movable bracket, and the bolt is inserted into an inner circumference of the coil spring. Therefore, the bolt serves both as a support or guide for the coil spring and as a stopper for restricting the maximum extension position of the coil spring (that is, the maximum swing position of the movable bracket).

Further, in a preferred aspect of the present invention, the swing shaft is arranged at one end of the fixing bracket near the guide rail, and the coil spring is arranged at the other end, and the roller shaft is It is located between the swing shaft and the coil spring when projected vertically on the base plate.

Further, in a preferred aspect of the present invention, the movable bracket includes a stopper support portion projecting outward from a support piece of the fixed bracket, and a tip portion of the stopper support portion faces the base plate. A rod-shaped stopper is attached. When the guide roller is pushed by the guide rail due to the swing of the car, the stopper comes into contact with the base plate at a predetermined swing position of the movable bracket and suppresses excessive swing of the movable bracket.

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

Further, since both the swing shaft and the roller shaft support both ends, it is possible to secure the support strength of the guide roller without excessively increasing the size of the fixed bracket, the movable bracket, etc. It is possible to reduce the size and weight of the roller guide device while suppressing such problems.

Further, since the coil springs are arranged between the bottom walls of both brackets, the structure is simpler than the conventional structure.

1 is a perspective view of an elevator car including a roller guide device. The perspective view which shows the 1st Example of a roller guide apparatus. The exploded perspective view of one roller guide. FIG. 3 is a perspective view showing a state where one roller guide is mounted on a base plate. The perspective view of the roller guide apparatus of 2nd Example. The exploded perspective view of one roller guide in a 2nd example. FIG. 9 is a perspective view showing a state in which one roller guide in the second embodiment is mounted on a base plate.

An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an elevator car 2 having a roller guide device 1 according to the present invention. The car 2 that moves up and down in the hoistway (not shown) includes a car frame 3 having a rectangular shape and a car chamber 4 supported by the car frame 3, and is provided on the left and right of the hoistway. With respect to the pair of guide rails 5, the roller guide devices 1 are provided at two places on the left and right of the car frame 3 (four places in total). 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, showing the roller guide device 1 attached to the upper surface of the car frame 3 in FIG. The guide rail 5 is a general T-shaped guide rail in which the mounting portion 6 and the rail portion 7 are integrated so as to form a T-shaped cross section, as shown in the figure. The roller guide device 1 includes a base plate 11 having a notch 12 (see FIGS. 3 and 4) into which the rail portion 7 of the guide rail 5 is inserted, in the center of the front edge 11 a, and a base plate 11 provided on the base plate 11. One roller guide 13, specifically, a pair of side surface roller guides 13A, 13B facing the side surfaces 7a, 7b of the rail portion 7 and one top surface roller guide 13C facing the top surface 7c of the rail portion 7. I have it. These three roller guides 13 are arranged so as to surround the cutout portion 12 of the base plate 11. The three roller guides 13 have basically the same configuration, and more specifically, the two side surface roller guides 13A and 13B are configured to be symmetrical with each other with the rail portion 7 interposed therebetween. The top roller guide 13C has the same structure as one of the side roller guides 13A and 13B, for example, the side roller guide 13A.

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

The roller guide 13 includes a fixed bracket 21 attached to the base plate 11, a swing shaft 22 supported at both ends by the fixed bracket 21, and a movable bracket swingably supported by the fixed bracket 21 via the swing shaft 22. The bracket 23, the roller shaft 24 supported at both ends by the movable bracket 23, the disc-shaped guide roller 25 rotatably supported by 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 swing direction so that the movable bracket 23 is pressed by an urging force, and, on the contrary, excessive displacement of the guide roller 25 when the guide roller 25 is pushed by the guide rail 5. And a stopper 27 that regulates.

The fixing bracket 21 is made of a press-formed product of a steel plate, and has a substantially U shape in which a pair of support pieces 21b stand upright from both sides of a substantially rectangular bottom wall 21a. The fixing bracket 21 is arranged 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 21a is fixed to the base plate 11 with a plurality of (for example, two) bolts 31. A circular bearing hole 32 is formed at the end of each support piece 21b on the notch 12 side (that is, near the guide rail 5). Metal bushes 33 serving as bearing members are fitted in the bearing holes 32, and both ends of the swing shaft 22 are rotatably supported through the metal bushes 33. The base plate 11 is made of a relatively thick steel plate, and a screw hole 31a is formed in advance at a position where the bolt 31 is screwed. Further, the swing shaft 22 is adapted to be prevented from coming off by a bolt 22a with a flange that is screwed into a screw hole at the tip.

The movable bracket 23 is made of a press-formed product of a steel plate like the fixed bracket 21, and has a substantially U-shape in which a pair of support pieces 23b stand up from both sides of a substantially rectangular bottom wall 23a. Here, each of the support pieces 21b has a substantially triangular shape having an apex angle approximate to an isosceles triangle having a smaller apex angle than the other two corners, and a part of a portion corresponding to the bottom side is a side edge of the bottom wall 23a. In succession. Further, a circular bearing hole 35 is formed at an end portion 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 that serves as a bearing member.

Note that the bottom wall 23a does not exist at the end portion on the side where the bearing hole 35 is provided, and the bottom wall 23a is notched so as to open downward.

A circular bearing hole 37 is also formed at a portion corresponding to the apex angle of the pair of support pieces 23b forming the 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 adapted to be prevented from coming off by a bolt 24a with a flange that is screwed into a screw hole at the tip.

The disc-shaped guide roller 25 has 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. Contact. The guide roller 25 is provided with a rolling bearing (not shown) composed of a ball bearing or a needle bearing at the center thereof, and is rotatably supported by the roller shaft 24 via the rolling bearing. Therefore, the guide roller 25 is arranged so as to be 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 fixed bracket is provided at the end opposite to the swing shaft 22. The bottom wall 23a of the movable bracket 23 overlaps with the bottom wall 21a of 21. The coil spring 26 is arranged in a compressed state between the bottom wall 21a of the fixed bracket 21 and the bottom wall 23a of the movable bracket 23 which overlap each other in this way.

Specifically, a spring support bolt 41 penetrating the bottom wall 21a of the fixing bracket 21 and screwed into a screw hole 41a of the base plate 11 is provided upright from the bottom wall 21a so as to be perpendicular to the surface of the base plate 11, The coil spring 26 is fitted around the spring support bolt 41. In other words, the spring support bolt 41 is inserted through the inner circumference of the coil spring 26. Therefore, the coil spring 26 is in a posture in which its central axis is orthogonal to the surface of the base plate 11. A disc-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 fixed bracket 21 and is attached to the spring support bolt 41. By tightening the screwed nut 43 from above the shim 42, the spring support bolt 41 is prevented from loosening.

The tip end portion of the spring support bolt 41 penetrates a circular hole 45 formed in the bottom wall 23a of the movable bracket 23, and a pair of nuts 46 are attached to the circular hole 45 in the form of a so-called double nut. When the movable bracket 23 swings by the urging force of the coil spring 26, the nut 46 contacts the bottom wall 23 a of the movable bracket 23 and restricts the swing of the movable bracket 23. That is, the maximum swing position of the movable bracket 23 in the 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 both as a support or guide for the coil spring 26 and as a stopper for restricting the maximum extension position of the coil spring 26 (that is, the maximum swing position of the movable bracket 23). There is.

In addition, in the first embodiment shown in FIGS. 2 to 4, a stopper support piece 23c, which is continuous with the bottom wall 23a of the movable bracket 23 and extends in a trapezoidal shape outward of one support piece 21b of the fixed bracket 21, is provided. It is formed integrally. A screw hole 48 is formed in the stopper support piece 23c serving as a stopper support portion, and a rod-shaped stopper 27 is attached to the screw hole 48. Specifically, the stopper 27 is a bolt-shaped stem 27a having a thread to be screwed into the screw hole 48, and a substantially cylindrical stopper portion made of an elastic material such as rubber or urethane provided at the lower end of the head. 27b, and the mounting position on 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. Then, the nut 49 that is screwed onto the stem 27a is tightened toward the stopper support piece 23c to prevent the stem 27a from loosening. 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 shaking of the elevator car 2 or the like, the stopper portion 27b having elasticity causes the stopper 27b of the base plate 11 to move. The movable bracket 23 is brought into contact with the surface and regulates excessive swing of the movable bracket 23 and thus excessive displacement of the car 2.

In the reference state in which the guide rail 5 is in contact with the guide rail 5, as shown in FIG. 4, the bottom wall 21a of the fixed bracket 21 and the bottom wall 23a of the movable bracket 23 are substantially parallel to each other. .. Therefore, 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 vertically projected on the base plate 11, the roller shaft 24 is located between the swing shaft 22 and the coil spring 26. That is, the disc-shaped guide roller 25 is arranged almost directly above the fixed bracket 21.

Further, in the illustrated example, the distance from the center of the swing shaft 22, which is the swing center of the movable bracket 23, to the center of the roller shaft 24, and the point of action of the spring force of the coil spring 26 from the center of the swing shaft 22 as well. And the distance to the center of the hole 45 are set to be equal to each other. That is, the arm length of the rotation moment input by the spring force and the arm length of the rotation moment given to the guide roller 25 are equal to each other as the rotation moment through the swing of the movable bracket 23. This facilitates setting or adjustment of the load of the coil spring 26.

The individual roller guides 13 are configured as described above, and as described above, the three roller guides 13 (the side surface roller guides 13A and 13B and the top surface roller guide 13C) are mounted on the base plate 11. Has been. The base plate 11 is provided with a plurality of (for example, four) mounting holes 50 for mounting to the car frame 3 at positions not covered by these three roller guides 13. As shown in FIG. 2, the pair of side surface roller guides 13</b>A and 13</b>B are arranged on both sides of the cutout portion 12 so that the respective fixing brackets 21 are along the front edge 11 a of the base plate 11. The stoppers 27 are arranged so as to be on the opposite side of the front edge 11a. In the top roller guide 13C, which side the stopper 27 is arranged on is arbitrary, but in the illustrated example, it is the same as 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 rollers 25 on both sides, and therefore the configuration is simple. At the same time, the outer dimensions of the individual roller guides 13 and thus the entire roller guide device 1 are reduced. In particular, the coil spring 26 is arranged 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. 26 and 26 are arranged so as to overlap each other, it is possible to reduce the projected area when viewed along the direction orthogonal to the surface of the base plate 11. 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 by the projection surface of the guide roller 25. In other words, the coil spring 26 does not substantially project outside the three guide rollers 25, resulting in a compact structure.

Further, as compared with the case where the coil spring is arranged along the diametrical direction of the guide roller as in the related art, it is possible to bring the roller shaft 24 closer to and support the guide rail 5, and thus the guide roller 25 has a smaller diameter. Is possible. By reducing the diameter of the guide rollers 25, the individual roller guides 13 and thus the roller guide device 1 as a whole are further miniaturized.

Since the structure of the roller guide 13 arranged on the base plate 11 is small and simple, the mounting hole 50 formed on the base plate 11 can be arranged relatively close to the guide rail 5, and by extension, The size of the base plate 11 can be reduced.

Further, since both the swing shaft 22 and the roller shaft 24 support both ends, the support strength of the guide roller 25 is ensured without excessively increasing the size of the fixed bracket 21, the movable bracket 23, or the like and making them thick. It will be easy. Further, by supporting both ends, when the guide roller 25 receives a load, it becomes difficult for the guide roller 25 to tilt, and it is possible to reduce the size and weight of the roller guide device 1 while suppressing the vibration and the like due to the tilt of the guide roller 25. Is.

In addition, since the stopper 27 is configured to directly contact the base plate 11, the configuration is simpler than the configuration in which the load of the stopper is received via another bracket or the like.

The roller guide device 1 having such a small size and a simple structure is suitable for use in a newly manufactured elevator, for example, at the time of maintenance of an existing elevator using a sliding guide shoe device. It is also possible to replace the sliding guide shoe device and apply it. That is, according to the present invention, the roller guide device 1 can be miniaturized to the extent that it can be arranged in the space of the existing sliding guide shoe device.

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 component different from the movable bracket 23 as the stopper support portion. A stopper support bracket 52 is attached to the outer surface of one support piece 23b of the movable bracket 23 via a plurality of bolts 53. The bolt 53 is screwed into a screw hole 53a provided in the support piece 23b of the movable bracket 23. The stopper support bracket 52 has a screw hole 48 into which the stem 27a of the stopper 27 is screwed, similarly to the stopper support piece 23c of the first embodiment described above, 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 the parts, and the stopper support bracket 52 is selectively attached to either of the support pieces 23b. It is configured to be attached to.

DESCRIPTION OF SYMBOLS 1... Roller guide device 2... Basket 5... Guide rail 11... Base plate 13, 13A, 13B, 13C... Roller guide 21... Fixed bracket 21a... Bottom wall 21b... Support piece 22... Oscillating 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 an ascending/descending car; and a roller guide arranged on the base plate,
The roller guide is
A steel plate is press-molded so that a pair of supporting pieces stand up from both sides of the bottom wall to form a substantially U shape , and the bottom wall is fixed to the base plate with a bolt located in the bottom wall. Bracket and
A swing shaft whose both ends are supported by the pair of support pieces of the fixed bracket,
A steel plate is press-molded so that a pair of support pieces rise from both sides of the bottom wall to form a substantially U shape, and the pair of support pieces are swingably supported by the fixed bracket via the swing shaft. and the movable bracket,
A roller shaft having both ends supported by the pair of support pieces of the movable bracket,
A guide roller rotatably supported via the roller shaft,
A coil spring arranged in a compressed state between the bottom wall of the fixed bracket and the bottom wall of the movable bracket, and urging the movable bracket along the swinging direction in which the guide roller approaches the guide rail,
Elevator roller guide device equipped with. The roller guide device for an elevator according to claim 1, wherein three roller guides are provided on the base plate corresponding to the T-shaped guide rails. 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 restrict the maximum swing position of the movable bracket in the swing direction in which the guide roller approaches the guide rail. With a nut screwed to the tip of
The roller guide device for an elevator according to claim 1 or 2, wherein the bolt is inserted into an inner circumference of the coil spring. The swing shaft is arranged at one end of the fixed bracket near the guide rail, and the coil spring is arranged at the other end.
The roller guide for an elevator according to claim 1, wherein the roller shaft is located between the swing shaft and the coil spring when projected vertically on the base plate. apparatus. The movable bracket is provided with a stopper support portion projecting outward from the support piece of the fixed bracket, and a rod-shaped stopper having a tip end facing the base plate is attached to the stopper support portion. The roller guide device for an elevator according to claim 1, wherein the roller guide device is an elevator roller guide device. The elevator roller according to any one of claims 1 to 5, wherein, when the guide roller is vertically projected on the base plate, at least a part of the coil spring overlaps a projection surface of the guide roller. Guide device.

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