CN210286393U

CN210286393U - Inclined light unilateral linear elevator

Info

Publication number: CN210286393U
Application number: CN201921146296.2U
Authority: CN
Inventors: 农东宝
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-04-10
Anticipated expiration: 2029-07-19

Abstract

The utility model discloses an inclined light unilateral linear elevator, which comprises a track mechanism made of channel steel, a pulley mechanism, a power mechanism, a winding wheel, a connecting steel wire, a manned mechanism detachably connected with the pulley mechanism, a power line and a power switch, wherein the part of the pulley mechanism is positioned inside the track mechanism; the track mechanism is consistent with the inclination angle of the stairs, the track mechanism is fixed on the wall surface adjacent to the stairs, the winding wheel is positioned at the top end of the track mechanism, the upper end of the connecting steel wire is wound on the winding wheel, the lower end of the connecting steel wire is connected with the pulley mechanism, and the pulley mechanism slides along the track mechanism under the driving of the power mechanism through the connecting steel wire to drive the manned mechanism to lift along the track mechanism. Compared with an external elevator, the elevator mounting device is safer, simple in structure, convenient to use, small in occupied space, low in mounting cost, economical and practical, free of setting on all floors as required, and suitable for flexible mounting and use in low-floor communities.

Description

Inclined light unilateral linear elevator

Technical Field

The utility model belongs to the technical field of the elevator, especially, relate to the light-duty unilateral linear elevator of tilting.

Background

With the increasing aging population, the life and health problems of the elderly are increasingly emphasized. Generally, after the aged people get 60 years old, due to the aging of human biological organisms, the immune function is continuously reduced, and the health degree of the body is linearly reduced, so the aged people are often suffered from poor physical strength, various diseases and hypomnesis.

At present, the old often uses crutches or armchairs to support walking, but the crutches or armchairs are usually passive and inconvenient to use when climbing stairs; when the old person climbs a building, great strength needs to be consumed, the old person with weak physical strength can fall down easily, and the fatality rate of the old person falling down is very high.

Newly-built high-rise building in the residential building all can be equipped with the elevator, however because the infrastructure is imperfect before in the old-fashioned residential building, the configuration of elevator is mostly not had in the residential building of 6 floors height. Many old buildings employ an extra-building mounted elevator solution, however the implementation of this solution presents a number of problems: 1. the contradiction between high and low floors is difficult to reconcile, the external elevator is really good for residents on high floors, but for residents on the first floor, the second floor and the low floors, the inconvenience brought by the additional installation of the elevator exceeds the convenience of using the elevator, in addition, the cost problem of the additional installation of the elevator is solved, because the use and the loss of the elevator by the residents on the low floors are lower, the cost cannot be accepted in an evenly sharing mode, and some communities need to subsidize the residents on the low floors; 2. the external elevator brings many problems, such as high cost, occupation of the air space, sunlight shielding, noise pollution and the like, and troubles are brought to the life of residents. Therefore, many solutions for installing elevators in buildings have been developed. The patent application 'corridor walking machine' (application number: CN201620717625.4) provides an auxiliary device for going upstairs and downstairs, which comprises a slide bar and a screw rod parallel to the stair surface, wherein a slide block is arranged on the slide bar, a seat is arranged on the slide block, and a motor is arranged at one end of the screw rod. The device simple structure, occupation space are little, however, according to the feedback of machinery field personnel, owing to adopt the screw rod as power transmission mechanism, the usable length scope of screw rod is 2 ~ 3 meters at least, and the screw rod of nevertheless long-term unsettled placing is crooked because of self gravity problem easily, and this scheme is long-term to be used not practical.

Therefore, at present, no elevator which has a simple structure, occupies a small space and is low in cost and capable of solving the problem that the old people go upstairs still exists.

SUMMERY OF THE UTILITY MODEL

For solving the above defect of prior art, the utility model provides a following technical scheme:

the inclined light unilateral linear elevator comprises a track mechanism made of channel steel, a pulley mechanism, a power mechanism, a winding wheel, a connecting steel wire, a manned mechanism detachably connected with the pulley mechanism, a power line and a power switch, wherein the pulley mechanism is partially positioned in the track mechanism; the track mechanism is consistent with the inclination angle of the stairs, the track mechanism is fixed on the wall surface adjacent to the stairs, the winding wheel is positioned at the top end of the track mechanism, the upper end of the connecting steel wire is wound on the winding wheel, the lower end of the connecting steel wire is connected with the pulley mechanism, and the pulley mechanism slides along the track mechanism under the driving of the power mechanism through the connecting steel wire to drive the manned mechanism to lift along the track mechanism.

Preferably, the track mechanism includes the channel-section steel track, channel-section steel track opening part wall dorsad, coaster mechanism includes coaster board and gyro wheel, the gyro wheel distributes in the last face and the lower face of coaster board.

In order to further guarantee the stability of the pulley plate of the pulley mechanism in the channel steel rail, the upper plate rollers are distributed on four corners of the upper plate of the pulley plate, the direction of the upper plate rollers is parallel to the direction of the channel steel rail, and the positions of the lower plate rollers of the pulley plate are symmetrically arranged with the upper plate.

A total of eight rollers firmly limit the pulley mechanism in the channel steel rail, so that the pulley mechanism can only slide along the channel steel rail stably and linearly.

The top end and the bottom end of the channel steel track are sealed, so that the pulley plate is prevented from sliding out.

Preferably, the manned mechanism comprises an inverted L-shaped connecting rod connected with the pulley mechanism and a pedal arranged at the other end of the L-shaped connecting rod, and a holding rod is fixed on the pedal; the inverted L-shaped connecting rod comprises a cross rod and a vertical rod, a through hole in the shape of a cylindrical cavity is formed in the pulley plate perpendicular to the wall surface, the cross rod of the L-shaped connecting rod penetrates through the pulley mechanism through the through hole, the L-shaped connecting rod is rotatably fixed on the pulley structure, and the pedal is separated from the stair surface by a certain distance.

Preferably, the through hole is internally provided with a bearing, the pulley plate is an upper part and a lower part which are combined together after the bearing is added, and the cross rod of the L-shaped connecting rod can smoothly rotate in the pulley plate due to the design of the bearing.

Preferably, the channel steel track is fixed on the adjacent wall surface through a bolt structure, the bolt structure comprises a welding rod and an expansion bolt which are connected with the channel steel track and distributed on the upper side and the lower side of the channel steel track, and a connecting line of the expansion bolt is parallel to the direction of the channel steel track.

Preferably, the power mechanism comprises a motor and a gear transmission mechanism which are positioned at the top end of the track mechanism, and the motor is fixed on the track mechanism and the adjacent wall surface through a motor base; the gear transmission mechanism comprises a small bevel gear connected with the motor and a large bevel gear vertically matched with the small bevel gear, the number of teeth of the small bevel gear is less than the number of teeth of the large bevel gear, the large bevel gear is connected to the winding wheel through a gear shaft, the large bevel gear and the gear shaft are coaxial and relatively static, and the bottom end of the gear shaft is rotatably fixed on the channel steel track through a bearing to allow the gear shaft to smoothly rotate.

Preferably, the motor is a speed reduction motor or a tubular motor, the transmission ratio between a large gear and a small gear in the gear transmission mechanism is 4:1, the rotation speed of the motor is reduced through the gear transmission mechanism, and the ascending linear speed of the pulley mechanism is about 3 m/min.

In order to ensure the safety of users and the running of the mechanism, outer housings are arranged outside the motor, the gear transmission mechanism and the winding wheel, so that the children or personnel are prevented from being touched by mistake.

The power cord is connected motor and switch, and the power cord distributes in the inboard intermediate layer of channel-section steel track, prevents and is connected steel wire and coaster mechanism winding.

Preferably, a nut with internal threads is arranged on the cross rod of the L-shaped connecting rod, the nut can rotate on the cross rod in situ, and a matching bolt with external threads is fixedly arranged at a position where the L-shaped connecting rod on the side edge of the pulley mechanism penetrates through; after the cross rod of the L-shaped connecting rod penetrates through the side edge of the pulley mechanism, the nut and the matched bolt are screwed tightly, and the L-shaped connecting rod is further fixed on the pulley mechanism to prevent the L-shaped connecting rod from slipping.

The pedal is rotatably connected with the vertical rod of the L-shaped connecting rod through the hinge, and the pedal can rotate upwards to be parallel to the vertical rod of the L-shaped connecting rod but cannot rotate downwards.

Preferably, the hinge is a 90-degree self-locking folding hinge and is made of high-strength steel, so that a passenger with the weight of below 200 kilograms can be loaded.

The pedal is connected with the holding rod through a bolt mechanism, specifically, a screw hole is formed in the pedal, the screw hole can be formed in the outer side edge of the pedal or in any position perpendicular to the two side edges of the wall surface, or a plurality of screw holes are formed in the pedal and used as required, the bottom of the holding rod is provided with a screw, and the holding rod is screwed on the pedal during use. The purpose of this design lies in, combines the footboard of one section of the aforesaid can rotate to vertical direction, when not using this elevator, will hold up the pole and pull down, and the footboard rotates to vertical direction, does not occupy the space of stair, reduces the influence about normal stair are gone up and down.

Preferably, in order to deposit the holding rod, a fixing device is additionally arranged on the vertical rod of the L-shaped connecting rod, and the holding rod can be arranged on the vertical rod after being detached and can slide up and down along with the L-shaped connecting rod and the pulley mechanism.

Preferably, the fixing device can adopt an omega-shaped structure made of plastic, the omega-shaped fixing device is fixed on a vertical rod of the L-shaped connecting rod, the opening is used for fixing the holding rod, the mode that a plastic broom commonly used in life is fixed on a dustpan is similar, and the structure is simple and practical.

Preferably, the power switch is a single-switch double-control switch, and comprises a first switch and a second switch which are respectively arranged at the bottom end and the top end of the channel steel track.

Because coaster mechanism drives manned mechanism and rises slowly, like the speed of automatic escalator in the market, even the old person is in coaster mechanism and is marchd the supplementary footboard of getting up the pole down of in-process on stair railing and footboard and can not produce very big potential safety hazard yet.

The design of the inclined light unilateral linear elevator provided by the utility model aims at saving labor and safely going upstairs for the old, the linear elevator is fixed on a side wall surface, the pedals and the holding rods can be retracted or disassembled, the occupied space of the stairs is small, and the stairs going upstairs for other people are hardly influenced; the height of the pedal is slightly higher than that of the stairs, so that the old can safely and easily get on the pedal; eight rollers are arranged on the pulley mechanism to stably limit the pulley plate in the channel steel rail, and the pedal is further and firmly fixed on the pulley mechanism through a bolt structure on the L-shaped connecting rod, so that the safety is improved. Compared with an external elevator, the elevator has the advantages of simple structure, convenience in use, small occupied space, low installation cost, economy and practicability, and is suitable for flexible installation and use in low-floor communities without being arranged on all floors as required.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.

Fig. 1 is a front view of a tilting light unilateral linear elevator structure provided by the utility model;

FIG. 2 is a first detailed view of a tilted light unilateral linear elevator pulley plate structure provided by the present invention;

FIG. 3 is a detailed view of the inclined light unilateral linear elevator pedal structure provided by the present invention;

fig. 4 is a detailed view of a pulley plate structure in the inclined light unilateral linear elevator pulley plate provided by the utility model;

fig. 5 is a detailed view of the top structure of the inclined light single-side linear elevator channel steel rail provided by the utility model;

fig. 6 is a right side view of the inclined light single-sided linear elevator structure provided by the present invention;

fig. 7 is a structural plan view of the inclined light single-sided linear elevator provided by the present invention;

fig. 8 is the utility model provides a light-duty unilateral linear elevator overall structure chart of tilting.

The system comprises a steel channel track 1, a pulley mechanism 2, a manned mechanism 3, a power mechanism 4, a winding wheel 5, a connecting steel wire 6, a power line 7, a single-switch double-control switch 8, a stair 9 and a wall surface 10;

11-welding rod, 12-expansion bolt, 21-scooter plate, 22-upper plate roller, 23-lower plate roller, 31-L-shaped connecting rod, 32-pedal, 33-holding rod, 34-through hole, 311-cross rod, 312-vertical rod, 313-hinge, 41-motor, 411-motor base, 42-bevel pinion, 43-bevel gear, 3111-nut, 3121-holding rod fixing device, 81-switch I, and 82-switch II.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

An inclined light unilateral linear elevator is shown in figure 1 and comprises a track mechanism made of channel steel, a pulley mechanism 2, a power mechanism 4, a winding wheel 5, a connecting steel wire 6, a manned mechanism 3 detachably connected with the pulley mechanism, a power wire 7 and a power switch, wherein the pulley mechanism is partially positioned in the track mechanism; the track mechanism is consistent with an inclination angle of a stair 9, the track mechanism is fixed on a wall surface adjacent to the stair, the winding wheel 5 is located at the top end of the track mechanism, the upper end of the connecting steel wire 6 is wound on the winding wheel 5, the lower end of the connecting steel wire 6 is connected with the pulley mechanism 2, the pulley mechanism 2 slides along the track mechanism under the driving of the power mechanism 4 through the connecting steel wire 6, and the manned mechanism is driven to lift along the track mechanism.

As shown in fig. 1, 2 and 8, the track mechanism includes a channel steel track 1, an opening portion of the channel steel track 1 faces away from a wall surface 10, and the pulley mechanism 2 includes a pulley plate 21 and rollers, and the rollers are distributed on an upper plate surface and a lower plate surface of the pulley plate.

In order to further ensure the stability of the pulley plate 21 of the pulley mechanism 2 in the channel steel rail 1, the upper plate rollers 22 are distributed on four corners of the upper plate of the pulley plate 21, the direction of the upper plate rollers is parallel to the direction of the channel steel rail 1, and the positions of the lower plate rollers 23 of the pulley plate are symmetrically arranged with the upper plate. A total of eight rollers firmly restrain the carriage mechanism in the channel rail so that the carriage mechanism 2 can only slide linearly along the channel rail 1.

The top end and the bottom end of the channel steel track 1 are closed, and the skid-proof vehicle plate 21 is prevented from sliding out.

As shown in fig. 3, the people carrying mechanism 3 comprises an inverted L-shaped connecting rod 31 connected with the tackle mechanism 2 and a pedal 32 arranged at the other end of the L-shaped connecting rod, wherein a holding rod 33 is fixed on the pedal; the inverted L-shaped connecting rod 31 comprises a cross rod 311 and a vertical rod 312, a cylindrical cavity through hole 34 is formed in the direction perpendicular to the wall surface on the pulley plate 21, the cross rod 311 of the L-shaped connecting rod penetrates through the pulley mechanism through the through hole 34, the L-shaped connecting rod is fixedly and rotatably fixed on the pulley structure, and the pedal is separated from the stair surface by a certain distance.

As shown in fig. 4, as a typical embodiment, a bearing is provided in the through hole 34, and the pulley plate 21 is combined with the upper and lower parts of the bearing, and the bearing is designed to allow the cross bar 311 of the L-shaped link to rotate relatively smoothly in the pulley plate 21.

The channel steel track 1 is fixed on an adjacent wall surface through a bolt structure, as a typical embodiment, as shown in fig. 1, the bolt structure includes a welding rod 11 and an expansion bolt 12 which are connected with the channel steel track and distributed on the upper side and the lower side of the channel steel track, and a connection line of the expansion bolt 12 is parallel to the direction of the channel steel track 1.

As shown in fig. 5, the power mechanism 4 includes a motor 41 and a gear transmission mechanism located at the top end of the track mechanism, the motor is fixed on the track mechanism and the adjacent wall surface through a motor seat 411, and the fixing mode may be bolt fixing and welding fixing; the gear transmission mechanism comprises a small bevel gear 42 connected with the motor 41 and a large bevel gear 43 vertically matched with the small bevel gear, the number of teeth of the small bevel gear 42 is less than that of the large bevel gear 43, the large bevel gear is connected to the winding reel through a gear shaft, the large bevel gear and the gear shaft are coaxial and relatively static, and the bottom end of the gear shaft is rotatably fixed on the channel steel track 1 through a bearing to allow the gear shaft to smoothly rotate.

As a typical embodiment, the motor is a speed reducing motor, the total transmission ratio between a large gear and a small gear in the gear transmission mechanism is 4:1, the rotation speed of the motor is reduced through the gear transmission mechanism, and the ascending linear speed of the pulley mechanism is about 3 m/min.

In another exemplary embodiment, the motor is a sunflower tubular motor, available from Ningbo Duya electromechanics, Inc. under the Dooya family of sunflower motors, model number DM 59M-120/9.

In order to ensure the safety of users and the operation of the mechanism, outer housings are arranged outside the motor 41, the gear transmission mechanism and the winding wheel 5, so that the accidental touch of children or personnel is avoided.

As shown in fig. 6, the power line 7 is connected with the motor and the power switch, and the power line 7 is distributed in an interlayer at the inner side of the channel steel track 8 to prevent from being wound with the connecting steel wire and the pulley mechanism.

Preferably, a nut 3111 with internal threads is arranged on the cross bar 311 of the L-shaped connecting rod, the nut can rotate in situ on the cross bar, and a matching bolt with external threads is fixedly arranged at a position where the L-shaped connecting rod on the side of the pulley mechanism passes through; after the cross rod 311 of the L-shaped connecting rod passes through the side edge of the pulley mechanism, the nut 3111 and the matching bolt are screwed tightly, and the L-shaped connecting rod is further fixed on the pulley mechanism to prevent the L-shaped connecting rod 31 from slipping.

The pedal 32 is rotatably connected to the vertical bar 312 of the L-shaped link by a hinge 313, and the pedal can be rotated upwards parallel to the vertical bar of the L-shaped link but cannot be rotated downwards.

As a typical example, the hinge is a 90 degree self-locking folding hinge available from online stores, and the product model is a D15 folding hinge, made of high-strength steel, and capable of loading passengers with a weight of less than 100 kg.

In order to store the holding rod, as shown in fig. 7, a fixing device 3121 is additionally installed on the vertical rod of the L-shaped connecting rod, and the holding rod can be placed on the vertical rod after being detached and can slide up and down along with the L-shaped connecting rod and the pulley mechanism.

As an exemplary embodiment, the fixing device may be an omega-shaped structure made of plastic, the omega-shaped fixing device is fixed on the vertical rod 312 of the L-shaped connecting rod, and the opening is used for fixing the handrail 33, similar to the way that a plastic broom commonly used in life is fixed on a dustpan, and the structure is simple and practical.

As a typical embodiment, the power switch is a single-on double-control switch 8, which includes a first switch 81 and a second switch 82, respectively disposed at the bottom end and the top end of the channel steel rail 1.

The utility model provides a light-duty unilateral sharp elevator of tilting's use does, when going up stairs, revolve footboard 32 to the level, will hold up pole 33 and pull down from holding up pole fixing device 3121, screw on footboard 32, take advantage of terraced personnel's foot and go up footboard 32, open the first 81 of switch that is located channel-section steel track 1 bottom, motor 41 work drives the take-up reel 5 rotatory, it shortens to connect steel wire 6, it rises to the stair top slowly to follow stair on coaster mechanism 2 intercommunication people carrying mechanism 3, take advantage of terraced personnel and walk down footboard 32, close two 82 of switch on channel-section steel track 1 top, the motor outage, coaster mechanism slowly slides to channel-section steel track 1 bottom under the effect of self gravity, follow-up personnel of going up stairs can continue to use or will hold up pole 33 and pull down and settle.

Because coaster mechanism drives manned mechanism and rises slowly, like the speed of automatic escalator in the market, even the old person is in coaster mechanism and is marchd the supplementary footboard of descending of pole of holding up on stair railing and the footboard and also can not produce the potential safety hazard.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The inclined light unilateral linear elevator is characterized by comprising a track mechanism made of channel steel, a pulley mechanism, a power mechanism, a winding wheel, a connecting steel wire, a manned mechanism detachably connected with the pulley mechanism, a power line and a power switch, wherein part of the pulley mechanism is positioned in the track mechanism; the track mechanism is consistent with the inclination angle of the stairs, the track mechanism is fixed on the wall surface adjacent to the stairs, the winding wheel is positioned at the top end of the track mechanism, the upper end of the connecting steel wire is wound on the winding wheel, the lower end of the connecting steel wire is connected with the pulley mechanism, and the pulley mechanism slides along the track mechanism under the driving of the power mechanism through the connecting steel wire to drive the manned mechanism to lift along the track mechanism.

2. The inclined light-duty unilateral linear elevator according to claim 1, wherein the rail mechanism comprises a channel rail, an opening portion of the channel rail faces away from a wall surface, and the trolley mechanism comprises a trolley plate and rollers, and the rollers are distributed on an upper plate surface and a lower plate surface of the trolley plate.

3. The inclined light single-sided linear elevator as claimed in claim 2, wherein the upper plate rollers are distributed on four corners of the upper plate of the pulley plate, the direction of the upper plate rollers is parallel to the direction of the channel steel rails, and the positions of the lower plate rollers of the pulley plate are symmetrically arranged with respect to the upper plate.

4. The inclined light-weight one-sided linear elevator as claimed in claim 1, wherein the man-carrying mechanism comprises an inverted L-shaped link connected to the tackle mechanism and a step plate provided at the other end of the L-shaped link, the step plate having a rest bar fixed thereto; the inverted L-shaped connecting rod comprises a cross rod and a vertical rod, a cylindrical cavity-shaped through hole is formed in the direction perpendicular to the wall surface on the pulley plate, the cross rod of the L-shaped connecting rod penetrates through the pulley mechanism through the through hole, and the pedal is separated from the stair surface by a certain distance.

5. The inclined light unilateral linear elevator according to claim 2, wherein the channel rails are fixed to adjacent wall surfaces by a bolt structure, the bolt structure comprises a welding rod and expansion bolts, the welding rod and the expansion bolts are connected with the channel rails and distributed on the upper side and the lower side of the channel rails, and connecting lines of the expansion bolts are parallel to the direction of the channel rails.

6. The inclined light-duty single-sided linear elevator as claimed in claim 1, wherein said power mechanism comprises a motor and a gear transmission mechanism at the top end of the track mechanism, said motor being fixed to the track mechanism and the adjacent wall surface by means of a motor mount; the gear transmission mechanism comprises a small bevel gear connected with the motor and a large bevel gear vertically matched with the small bevel gear, the number of teeth of the small bevel gear is less than the number of teeth of the large bevel gear, the large bevel gear is connected to the winding wheel through a gear shaft, the large bevel gear and the gear shaft are coaxial and relatively static, and the bottom end of the gear shaft is rotatably fixed on the channel steel track through a bearing to allow the gear shaft to smoothly rotate.

7. The inclined light-weight one-sided linear elevator as claimed in claim 6, wherein the motor is a speed reduction motor or a tubular motor, the gear ratio between the large and small gears in the gear transmission mechanism is 4:1, and the linear speed of ascent of the pulley mechanism is 3 m/min.

8. The inclined light-weight single-sided linear elevator as defined in claim 4, wherein the step plate and the vertical rod of the L-shaped link are rotatably connected by a hinge, the step plate being rotatable upward in parallel with the vertical rod of the L-shaped link but not rotatable downward; the hinge is a 90-degree self-locking folding hinge.

9. The inclined light single-sided linear elevator as claimed in claim 4, wherein a fixing device is additionally mounted on the vertical rod of the L-shaped connecting rod, the fixing device is of an omega-shaped structure made of plastic, the omega-shaped fixing device is fixed on the vertical rod of the L-shaped connecting rod, and the opening is used for fixing the handrail.

10. The inclined light single-side linear elevator as claimed in claim 2, wherein the power switch is a single-switch double-control switch, and comprises a first switch and a second switch, which are respectively arranged at the bottom end and the top end of the channel steel track.