JPH0749355B2 - Lifting device by setting the screw fitting shape of the bearing and the band rail. - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is, so to speak, an idea of rotating and raising and lowering a bolt in a screw-fitting state of a bolt and a nut to form an elevator mechanism, in which friction loss of the screw-fitting portion is reduced. Although it is an essential condition, therefore, a male and female screw structure is enlarged to an appropriate size as it is, that is, a rail that is curved in a circular shape like a male screw on a short cylinder, and a bearing with an internally threaded arrangement that matches it on the inner surface of the outer shell. The present invention relates to an elevator that is unitized by a structure in which a short cylinder is rotatably supported by a frame and is rotated in conjunction with a motor shaft attached to the frame to elevate and lower the frame, and its application and development.

[0002]

2. Description of the Related Art Conventionally, a sliding device called a ball screw is known as a so-called smooth linear slide having the least frictional resistance. For example, it has a wide range of uses such as an XY recorder in a measuring machine and a machine tool feeding device, but it is almost impossible to immediately use it for an elevating device. That is, the structure is such that the lubricating oil used to lubricate the rotating ball and the screw shaft is indispensable for the entire sliding distance of the screw shaft portion. Therefore, the cover for protecting this and dustproof is made by the expandable bellows. Even if it is covered with a firm nesting cover like a bamboo shoot,
A long length like an elevator is impossible at all.

Further, the shaft is usually rotated to drive it, but if it becomes long, the runout due to its manufacturing precision will not be able to increase the number of revolutions, and if a motor is mounted on the nut side. However, there is a limit to the production of the long shaft side, and the technology of connecting a plurality of short ones has not been realized due to lack of capability at present due to its accuracy. Needless to say, if the screw method used in a tensile tester (Amsler) is used, a large-capacity motor must be adopted because of the long stroke and frequent use. However, wear at high rotation and frequent maintenance and maintenance of dust-proof lubrication However, it is impossible to realize in an elevator environment that is not in the test room environment.

[0004]

DISCLOSURE OF THE INVENTION The present invention envisions an outer shell of a proper large-diameter cylinder, and installs a shield bearing arranged along its inner surface in the shape of a female screw with an appropriate screw pitch and an appropriate lead angle. Insert a short cylinder in a nesting shape, and wrap or cut a male screw-shaped banded rail with the same pitch and the same lead angle around the outer circumference to make a pair of male and female screw fitting state, and rotate the internal short cylinder. However, the problem in that case is that instead of the conventional winch type gear reduction mechanism, the friction coefficient of the rolling bearing and its dust-proof lubrication because of the transmission mechanism expanded to the circumference Furthermore, since there is no central rotation axis, measures to prevent center runout and vertical runout (dancing) and proper selection of the reduction ratio for the motor speed specified by the bearing diameter, screw pitch width and screw lead angle are available. A point.

By further developing this concept, by mounting rails and bearings on the inner and outer circumferences of a plurality of short cylinders with a bottom plate in the order of large and small diameters, respectively, and inserting them one after another in a multiple screw shape, that is, in a nested manner, the initial stage is Although it is a multiple short cylinder, the present invention includes the concept of using it as a step for moving by extending it like a bamboo shoot until the end of the upper screw end of each cylinder.
Again, this is simply a male-screw female-screw structure, but it cannot be implemented unless the above problems are solved. It can be configured in the same way as an elevator, but in this case it does not require an entrance and exit unlike the elevator, so it is possible to reverse the relationship of the male and female screws, and the bearing is supported by pillars with a cover that easily opens the outer shell of the elevator. Since it is made of a rigid cylinder,
It can also be carried out in a strut form with a small-diameter bearing mounted horizontally. Of course, when the pillar method is used to reduce the weight, the same method can be used.

[0006]

[Means for Solving the Problems] The above dust prevention problem can be solved by protection by a semi-permanent oil-free shield bearing developed for automobile wheels in the last few years. For the prevention of run-out of the core, which has no other similar examples and has no central axis, is an engaging iron plate provided on the short cylindrical holding frame from both sides with a slight gap on the side of the shielded bearing. With the sandwiched structure, one direction of the bearing closely contacts the engaging iron plate during rotation and holds it from the XY direction, which is almost solved. At the same time, the engaging iron plate is extended to the vertical effective length and the rotation of Z Can be prevented. In that case, in order to obtain stability at higher speeds in the elevator,
The bearings can rotate and rotate if the contact positions of the side surfaces of the bearing are shifted to two or more, and the opposite side surfaces of the bearings are alternately brought into close contact with each other by adjusting the sheet metal and a proper gap is naturally provided on the opposite side surfaces. It is also possible to increase the shake prevention accuracy. In any case, the proper extension of the engaging iron plate also serves to prevent the dance including swinging in the elevator axial direction, that is, tilting of the elevation. In the case of an elevator, the elevator cage is provided by being connected to the upper (or lower) frame of the short cylinder, but the short cylinder and outer shell have a small diameter,
The stay may be projected to the outside from the frame and coupled to the tip of the stay. It can also be used as a simple ladder, and it is also possible to use this as a high-rise building escape device exclusively for descending, which has the concept of simultaneously descending a large number of simple rotating bodies without a motor.

The center holding mechanism of the multi-screw mechanism may be provided with an engaging iron plate at the tip of the rotatable cross frame attached to the outer center of the bottom of each short cylinder. It is possible to use a tensioning method with a small diameter bearing along the minimum radial 3 direction line provided along with, and the rotation increasing mechanism will have the function of each retaining pin of each rotation stop of the cover that expands and contracts like a bamboo. The sliding frictional resistance in this case is considered to be a little, but it is not twisted because it is not in the shaft center part. However, in this case as well, it must be taken into consideration that, in the case of a cylinder with the smallest diameter, the bearing outer diameter must be within the rail pitch and the rising torque cannot be obtained unless the bearing is designed to have a large diameter to meet an appropriate lead angle.

[0008]

[Operation] Maintenance is not required due to the shield bearing and the diameter of the screw structure is increased to easily achieve a conventional speed reduction mechanism such as a wire suspension system, and it can be stopped immediately by frictionally pressing the outer circumference of the rotating body with a slight force. In spite of this, the vertical lifting force is large and it is ideal for safety as an elevator. An ordinary elevator stops after a few shifts by an inverter to prevent positional deviation, but it can be said that this mechanism has almost no stopping positional deviation and can be simplified mechanically and electrically. It should be noted that the vertical guide rail is comparatively negerer than the friction resistance of the screw contact surface, but the present invention is realized because the engaging iron plate also serves as this and the friction resistance element including that is eliminated as much as possible. With the white metal method instead of the roller bearing, the friction coefficient is about 10 times (white metal friction coefficient 0.01-
0.02 is 0.001-0.00 for roller bearings
2) From the viewpoint of wear and wear, it is not enough to simply increase the capacity of the motor. Although there is some resistance in the detent mechanism of the extension mechanism of multiple cylinders, the guide system of this elevator can be adopted as another method, and those of the same mechanism are juxtaposed side by side and the rotation of the smallest cylinder part is geared at the top of the cylinder. 2 together 1
It can also be solved as a pair of steps. In that case, the motor is attached to the gear case at the interlocking gear position outside the middle and moves up and down with it.

Further, in this mechanism, originally, two bearings should be provided in a double row in a single screw pitch so that the bearings should be stretched up and down to prevent sway. Even when the weight is provided, a slightly downward load is left and it is covered by an appropriate effective length (up and down with a short cylinder sandwiched in the embodiment) to the vertical surface of the engaging iron plate. Of course, it is also possible to provide a rotatable cross-shaped frame on the outside of the bottom of each of the multiple cylinders and attach an engaging iron plate to the tip of the multiple frames to form a pillar-type outer shell and use the same lifting mechanism as the elevator.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS In order to describe the invention in more detail, it is illustrated by the accompanying drawings. Fig. 1 shows the proper pitch perpendicular to the inscribed circumferential position in each of the four columns 2 and 2 (a minimum of three is possible) built along the circumference inside the outer shell cylinder 1. , The shield bearings 3 ... are arranged and mounted in a screw shape in the circumferential direction, and the short cylinder 5 having a structure in which the band rail 4 is curved and wound around the outer periphery so as to be screw-fitted into this is screwed in. Set the frame 6 so that it is supported by thrust bearings at the upper and lower central positions, but at each of the four pillar positions, allow each bearing to have a slight gap from both sides on one side of the bearing. By providing the engaging iron plates 7, 7 ... With an appropriate length to be sandwiched, it is possible to keep the short cylinder 5 in the center from the XYZ directions, prevent the short cylinder 5 from rolling and dancing, and set it on the frame. 8 times attached as a unit Also it serves the role of free detent frictional resistance of the frame due to the reaction force of the rotation of the short cylinder 5 by a motor 9 for driving.
A pinion gear 10 is attached to the shaft of the motor 9 and a large gear 11 is attached to the short cylinder 5 to transmit the rotation of the motor. An outer door is provided between the columns 2 and 2 of the outer shell cylinder 1 at a corresponding position on the door 12 provided on the elevator basket 8 to serve as an entrance / exit.

FIG. 3 shows a gradual nesting of large and small cylinders based on the concept of FIGS. 1 and 2 so that they can be projected like bamboo shoots by fitting multiple screws. The small inner diameter bearings B, B are horizontally provided at appropriate positions between the mounting positions so that the inner circumference of the corresponding cylinder is stretched. A rotary drive motor 9'is mounted inside the central small diameter cylinder, and its rotation is fixed by fixing the upper surface of the small diameter cylinder to the uppermost part of the nesting cover cylinder ZZ (in this case, three steps) to form slit grooves HHH. Lock pin P ・ P ・ P
2 illustrates a mechanism that extends at the same time and serves as a detent and a detent. It is a lift that can be moved by attaching casters, etc., and is based on the extension concept described. In order to prevent the reaction force from rotating due to motor rotation, bamboo shoots of the same mechanism are installed in parallel, and the smallest cylinders of each are connected to the outside in a gear-linked manner and transmitted by an external motor attached to the gear box. May be. In addition, this mechanism may rotate the outermost cylinder or the outermost cylinder, and if the example shown in the figure that follows the motor ascending and descending the cylinder is inverted upside down, the motor is on the ground and only the cylinder moves up and down. This is also possible immediately, and instead of the cylindrical cover, two or three telescopic telescopic steel pipes may be fixed to the outermost cylindrical circumference. However, if the right and left screws of the rail plate are alternated and the engaging iron plate is extended to the cylinder height, the intermediate cylinder can be used as a power source, and it can be used as an extension step up to three steps or an entry stop sign.

[0012]

At the beginning of the invention, a screw-fitting type coupling was proposed in which the bearing was introduced into the nepitch, including a system in which the rail was fixed and the bearing was rotated, but this was corrected and deleted. That is, in this case, if the vertical swing is performed during the rotation of the short cylinder, the bearings hit the upper and lower male screw rails in the pitch each time, and the forward and reverse rotations are repeated, which serves as a brake. Furthermore, there is no way to hold the center of rotation more easily than the outer circumference, and it is difficult to attach the motor frame detent because the outer side is a rail, and there is no freedom of entrance and exit.
Male and female are reversed to eliminate all, and the remaining wear resistance and dust-proof lubrication are covered by shield bearings, and the dancing due to gaps in the pitch is an engaging iron plate extended to an appropriate length instead of bearing double installation etc. In this embodiment, the length of the short cylinder sandwiched from above and below can absorb the dance due to a slight pitch error at the time of installation, and the transmission mechanism is covered in the circumference and the maintenance-free shield bearing is installed in the screw. It was possible to achieve a stop accuracy, safety performance, and simplification of construction that can be added as needed. In addition, the problem of multi-threaded screws with a short-stroke extension structure can also be solved and it can be implemented.

[Brief description of drawings]

FIG. 1 Partial cutout of a structure in which four pillars are provided on the inner surface of an outer shell cylinder, a bearing is mounted in a screw shape on the inner surface, and a short cylinder in which a rail of a band is wound in a male screw shape is provided inside the pillar. It is a top view.

FIG. 2 is a side view of the above-described partial cutout.

FIG. 3 is a partially cutaway perspective view of a multi-screw type of the present invention.

[Explanation of symbols]

 1 Outer Shell Cylinder 2 Pillar 3, Shield Bearing 4, Wing Plate Rail 5 Short Cylinder 6 Frame 7 Engaging Iron Plate 8, Elevating Basket 9, 9'Motor 10 Pinion Gear 11 Large Gear 12 Door B Small Diameter Bearing Z Cover Cylindrical H Slot Groove P lock pin

Claims (2)

[Claims] 1. Vertically built 4 along the inner circumference of the outer shell cylinder.
Attach a shield bearing in the shape of a female screw with the same proper pitch vertically to the pillar of the book and with a proper lead angle on the circumference.
It is set by screwing in a short cylinder of appropriate large diameter that has a wavy plate rail curved in the shape of a male screw that fits with this screw, and is used as a detent for the cross-shaped frame that holds the forward / reverse rotation center of the short cylinder. , The vertical and vertical shielded bearings are sandwiched from both sides with a certain gap left between them, and an engaging iron plate with an effective length in the vertical direction is attached to the tip of the cross. Lifting device by. 2. A short cylinder having an appropriate small diameter of substantially the same length and the same specifications is provided inside a short cylinder having a bottom plate, and further a short cylinder having the same specifications is further provided inside thereof. It is set in multiple nesting, and the inner circumference of each of the outer and inner cylinders
A shield bearing and a right-handed or left-handed strip-shaped plate rail are set on the outer periphery in a screw-fitting state, and the rotation of the cylinder is interlocked by a motor with a rotation stop from the outside to rotate the cylinder sequentially. When expanding and lifting in the shape of a bamboo shoot, each short cylindrical bearing should have a proper number of small diameter bearings at appropriate positions on the bearing setting circumferential line, and at least three steps on the radial line, one step outside of the inner surface of the cylinder or one step outside of the outer surface. Lifting device by setting the screw fitting shape of the bearing and the band rail set with positioning to hold the rotation center in a stretched form.