CN220113107U - Fixing tool for stair chain of escalator - Google Patents

Abstract

The utility model discloses a fixing tool for an escalator step chain, which comprises the following components: a vertical fixing member which is arranged between the rollers of the step chain and is fixed on the step guide rail, and a pressing assembly for pressing the chain plate of the step chain is arranged on the vertical fixing member; the horizontal fixing piece is fixed on the step guide rail between rollers of the step chain and comprises a first fixing piece and a second fixing piece, wherein a first limiting groove is formed in the first fixing piece and is fixedly clamped with one roller of the step chain, a second limiting groove is formed in the second fixing piece and is fixedly clamped with the other roller of the step chain, and notch directions of the first limiting groove and the second limiting groove are respectively formed in the moving direction of the step chain and are opposite in direction so as to limit the rollers of the step chain to be close to each other. The combination of horizontal mounting and vertical mounting can reach the degree of freedom of multi-angle restriction step chain, and only need alternate in the chain can realize the degree of freedom of multi-angle restriction step chain, and the installation is simple and convenient.

Description

Fixing tool for stair chain of escalator

Technical Field

The utility model relates to the technical field of escalator, in particular to a fixing tool for an escalator step chain.

Background

The escalator used at present is long in whole and limited by the size of a vehicle, and is usually assembled by firstly completing part of the escalator, then transporting the escalator to the site in sections and then integrally assembling the escalator. In order to prevent the installed step chain from slipping off the conveyor belt during transportation, the step chain needs to be fixed.

The prior proposal is shown in figure 1, and is in a form that step chains of an upper rail and a lower rail are fixed together, a fixed fixture is formed by a hook, a sleeve rope and a steel wire rope, the hook and the sleeve rope are respectively arranged at two ends of the steel wire rope, the hook and the sleeve rope respectively pull a roller on the step chain of the upper rail and a roller on the step chain of the lower rail, and then the steel wire rope bypasses a truss to pull the roller of the step chains of the upper rail and the lower rail. However, in view of the limited freedom limited by the fixing mode, the steel wire rope is likely to fall off from the truss during jolting in transportation, so that the step chain cannot be fixed; and the fixing mode is complicated, and the steel wire rope is required to be tensioned, so that the hook and the sleeve rope are used for hanging the roller, and the operation is difficult.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art.

Therefore, the utility model provides a fixing tool for an escalator step chain, which is suitable for pressing rollers on a step guide rail through the step chain, and comprises the following steps: the vertical fixing piece is arranged between the rollers of the step chain and fixed on the step guide rail, and a pressing assembly for pressing the chain plate of the step chain is arranged on the vertical fixing piece; the horizontal fixing piece is arranged between rollers of the step chain and fixed on the step guide rail, the horizontal fixing piece comprises a first fixing piece and a second fixing piece, a first limiting groove is formed in the first fixing piece and is fixedly clamped with one roller of the step chain, a second limiting groove is formed in the second fixing piece and is fixedly clamped with the other roller of the step chain, and the notch directions of the first limiting groove and the second limiting groove are all set in the movement direction of the step chain and are opposite in directions so as to limit the rollers of the step chain to be close to each other.

According to the fixing tool disclosed by the utility model, the combination of the horizontal fixing piece and the vertical fixing piece can achieve the multi-angle limitation of the freedom degree of the step chain, the horizontal fixing piece formed by the first fixing piece and the second fixing piece passes through the chain of the step chain and is clamped on different rollers to limit the step chain to move in the moving direction of the step chain, meanwhile, the pressing component on the vertical fixing piece is matched, and the chain plate can be prevented from jumping in the moving direction perpendicular to the step chain by pressing the chain plate by the pressing component; and because the horizontal fixing piece and the vertical fixing piece are independent parts capable of realizing the fixing effect, the limiting effect of the step chain degree of freedom can be realized only by inserting the parts into the chain, and the installation is simple and convenient.

Further, the compaction force of the compaction assembly is adjustable.

Further, the vertical fixture includes: a first horizontal segment, at least a portion of which is attached to the step rail and secured thereto by a fastener; the vertical section of first, vertical section sets up between the roller of step chain, the top of vertical section of first is seted up along perpendicular to the ascending regulation recess of motion direction of step chain, compress tightly the subassembly optionally and be in the regulation recess is internal to adjust the packing force.

Further, the compression assembly includes: the pressing block is arranged on one side of the first vertical section and is suitable for pressing a chain plate of the step chain; screw rod and bolt, the bolt sets up the opposite side of first vertical section, the screw rod runs through the regulation recess, the briquetting with the bolt sets up respectively the both ends of screw rod, the briquetting with the diameter of bolt is all greater than the distance between the cell wall in the regulation recess.

Further, a width of a portion of the first vertical segment is less than or equal to a distance between rollers of adjacent two of the step chain, and a length of a portion of the first vertical segment is greater than or equal to a roller diameter of the step chain.

Further, the first horizontal segment and the first vertical segment are symmetrically arranged with respect to a first straight line, the adjusting groove is arranged on the first straight line, and the first straight line is perpendicular to the movement direction of the step chain.

Further, the first fixing piece and the second fixing piece are arranged in a mirror image mode.

Further, the first fixing member and the second fixing member each include: the second horizontal section is at least partially attached to the step guide rail and is fixed on the step guide rail through a fastener; the second vertical section is arranged between the rollers of the step chain, and the first limit groove or the second limit groove is arranged on the second vertical section.

Further, a width of a portion of the second vertical segment is less than or equal to a distance between rollers of adjacent two of the step chain, and a length of a portion of the second vertical segment is greater than or equal to a roller diameter of the step chain, the first limit groove or the second limit groove being disposed on a portion of the second vertical segment.

Further, the notch directions of the first limiting groove and the second limiting groove are arranged away from each other.

Further, the vertical fixing member is installed between the first fixing member and the second fixing member.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Other objects and advantages of the present disclosure will become apparent from the following description of the present disclosure with reference to the accompanying drawings, and may assist in a comprehensive understanding of the present disclosure.

FIG. 1 is a schematic illustration of a prior art segmented fixed step chain;

FIG. 2a is a front view of a vertical mount according to an embodiment of the present utility model;

FIG. 2b is a side view of a vertical mount in an embodiment according to the utility model;

FIG. 3 is a front view of a horizontal fixture in accordance with an embodiment of the present utility model;

FIG. 4 is a side view of a securing tool mated with a step chain in accordance with an embodiment of the present utility model;

fig. 5 is a front view of a fixture engaging a step chain according to an embodiment of the present utility model.

It is noted that the dimensions of structures or regions may be exaggerated or reduced in the drawings for describing embodiments of the present disclosure for clarity, i.e., the drawings are not drawn to actual scale.

Reference numerals:

the fixture 100 is fixed such that,

the roller wheel 200 is provided with a pair of rollers,

the step chain 300, rollers 310, link plates 320,

the step rail 400 is configured to move,

the truss 500 is configured such that,

vertical fixing member 10, adjusting groove 101, first horizontal section 11, first vertical section 12, pressing assembly 13, press block 131, screw 132, bolt 133,

the first fixing member 20, the first limiting groove 201, the transition section 21,

the second fixing member 30, the second limiting groove 301,

the fastener 40 is provided with a fastener which,

a spacer 50.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.

Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items.

In this document, unless specifically stated otherwise, directional terms such as "upper," "lower," "left," "right," "inner," "outer," and the like are used to denote orientations or positional relationships shown based on the drawings, and are merely used to facilitate the description of the present disclosure, rather than to indicate or imply that the devices, elements, or components referred to must have a particular orientation, be configured or operated in a particular orientation. It should be understood that when the absolute positions of the described objects are changed, the relative positional relationship they represent may also be changed accordingly. Accordingly, these directional terms should not be construed to limit the present disclosure.

An escalator is generally used in places with large traffic volume, such as airports, malls, stations, etc., and is connected between two floors to transport passengers up and down the stairs. The escalator used at present is long in whole and limited by the size of a vehicle, and is usually assembled by firstly completing part of the escalator, then transporting the escalator to the site in sections and then integrally assembling the escalator. In order to prevent the installed step chain from slipping off the conveyor belt during transportation, the step chain needs to be fixed.

The prior proposal is shown in figure 1, and is in a form that step chains of an upper rail and a lower rail are fixed together, a fixed fixture is formed by a hook, a sleeve rope and a steel wire rope, the hook and the sleeve rope are respectively arranged at two ends of the steel wire rope, the hook and the sleeve rope respectively pull a roller on the step chain of the upper rail and a roller on the step chain of the lower rail, and then the steel wire rope bypasses a truss to pull the roller of the step chains of the upper rail and the lower rail. However, in view of the limited freedom limited by the fixing mode, the steel wire rope is likely to fall off from the truss during jolting in transportation, so that the step chain cannot be fixed; and the fixing mode is complicated, and the steel wire rope is required to be tensioned, so that the hook and the sleeve rope are used for hanging the roller, and the operation is difficult.

The fixing tool for fixing the step chain provided by the utility model can complete the limiting effect on multiple degrees of freedom of the step chain only by being inserted into the middle of the chain of the step chain, reduces the installation time and can also ensure the reliability in the transportation process of the escalator.

The fixing tool 100 for an escalator step chain of the present utility model is described below with reference to fig. 2a to 5, the fixing tool 100 being adapted to press the rollers 200 against the step rail 400 by means of the step chain 300.

It should be understood that the step chain 300 is a chain that includes the link plate 320 and the roller 310, and in one chain, the link plate 320 includes an inside link plate and an outside link plate, the inside link plate is disposed outside the inside link plate and closer to the truss 500, and the inside link plate is adjacent to the roller 200 and the step rail 400. There is a gap between the inside and outside link plates, and the rollers 310 are disposed between, i.e., within, the inside and outside link plates. The fixing tool 100 of the utility model penetrates into a gap between the inner chain plate and the outer chain plate, then the horizontal fixing piece is clamped with the roller 310, and the vertical fixing piece 10 is pressed against the inner chain plate or the outer chain plate, so that the limiting effect of multiple degrees of freedom is realized.

Specifically, the fixing tool 100 includes: vertical fixtures 10 and horizontal fixtures. The vertical fixture 10 is adapted to limit the step chain 300 from jumping in the up and down direction as shown, and the horizontal fixture is adapted to limit the step chain 300 from moving in the left and right direction as shown.

Wherein, the vertical fixing member 10 is disposed between the rollers 310 of the step chain 300 and fixed on the step guide rail 400, and the pressing assembly 13 for pressing the link plate 320 of the step chain 300 is disposed on the vertical fixing member 10, and the jump of the link plate 320 in the direction perpendicular to the movement direction of the step chain 300 can be restricted by the pressing of the link plate 320 by the pressing assembly 13. That is, as shown in fig. 5, the pressing assembly 13 presses the link plate 320 downward after the vertical fixing member 10 is fixed.

The horizontal fixing piece is arranged between the rollers 310 of the step chain and is fixed on the step guide rail 400, the horizontal fixing piece comprises a first fixing piece 20 and a second fixing piece 30, the first fixing piece 20 is provided with a first limit groove 201, the first limit groove 201 is clamped and fixed with one roller 310 of the step chain, the second fixing piece 30 is provided with a second limit groove 301, the second limit groove 301 is clamped and fixed with the other roller 310 of the step chain, and notch directions of the first limit groove 201 and the second limit groove 301 are respectively arranged in the movement direction of the step chain 300 and are opposite in direction so as to limit the rollers 310 of the step chain to be close to each other.

It will be appreciated that a chain includes a plurality of rollers 310, with the first securing member 20 being snap-fitted to one roller 310 of the plurality and the second securing member 30 being snap-fitted to another roller 310 of the plurality. The notch direction of the first limiting groove 201 is opposite to the notch direction of the second limiting groove 301, and may be disposed towards each other or disposed away from each other. It should be clear that the opening sizes of the notch of the first limit groove 201 and the notch of the second limit groove 301 are not particularly limited in the present utility model. Under the action of the first and second limit grooves 201 and 301, the step chain 300 can be prevented from moving in the moving direction, i.e., as shown in fig. 5, the horizontal fixing member composed of the first and second fixing members 20 and 30 passes through the chain of the step chain 300 and is caught on the different rollers 310, limiting the movement of the step chain 300 in the moving direction thereof.

It can be appreciated that the step rail 400 includes an upper rail and a lower rail, and the fixing tool 100 of the present utility model can be used on the upper rail and the lower rail respectively, and because the horizontal fixing member and the vertical fixing member 10 are independent parts capable of realizing the fixing function, the upper rail and the lower rail can have different numbers of the vertical fixing member 10 and/or the horizontal fixing member, i.e. the number of the vertical fixing member 10 and the horizontal fixing member in the upper rail is different from the number of the vertical fixing member 10 and the horizontal fixing member in the lower rail, so that the number of the vertical fixing member 10 and the horizontal fixing member can be adjusted according to the actual situation, thereby achieving the effects of firmness and safety.

In addition, because the horizontal fixing piece and the vertical fixing piece 10 are independent parts capable of realizing the fixing function, the limiting function of the freedom degree of the step chain 300 can be realized only by being inserted into the chain, and the installation is simple and convenient.

According to one embodiment of the utility model, the pressing force of the pressing assembly 13 is adjustable.

Considering that the currently used step chain 300 has chains of different specifications, the heights of the link plates 320 are different. To expand the scope of the present utility model, the compression assembly 13 is designed as an adjustable structure that can adjust the compression force against the link plate 320.

According to one embodiment of the utility model, the vertical fixture 10 comprises: a first horizontal section 11 and a first vertical section 12. At least a portion of the first horizontal segment 11 is attached to the step rail 400 and secured to the step rail 400 by fasteners 40 and the first vertical segment 12 is disposed between the rollers 310 of the step chain. Wherein, the top of the first vertical section 12 is provided with an adjusting groove 101 along a direction perpendicular to the movement direction of the step chain 300, and the pressing assembly 13 is selectively slid in the adjusting groove 101 to adjust the pressing force.

By way of example, referring to fig. 2a, 2b and 4, the vertical fixture 10 is configured in an L-shape, the first horizontal section 11 is connected below the first vertical section 12, and the compression assembly 13 is disposed on the same side as the first horizontal section 11, i.e. the compression assembly 13 is located directly above the first horizontal section 11. When the vertical fastener 40 is used, the first vertical section 12 is inserted into the gap of the chain, the first horizontal section 11 is attached to the lower surface of the step guide 400, the first vertical section 11 is fixed by the fastener 40, and after the first horizontal section 11 at the bottom is fixed, the pressing assembly 13 at the top is adjusted, so that the pressing assembly 13 presses the link plate 320. In this embodiment, the adjustment recess 101 is opened upward, and the pressing link plate 320 is realized by the upward and downward movement (movement perpendicular to the movement direction of the step chain 300) of the pressing assembly 13.

It should be noted that, there are various unlocking modes and locking modes of the pressing component 13 in the adjusting groove 101, for example, the pressing component may be set to be a multi-gear clamping connection, and may also be set to press two sides of the first vertical section 12, and the utility model is not limited to the matching modes of the two. In addition, in this embodiment, the pressing assembly 13 moves up and down relative to the first vertical section 12, so that the pressing assembly 13 is integrally moved, in other embodiments, only part of the parts on the pressing assembly 13 may move, so that the pressing effect on the link plate 320 is achieved, for example, a pressing head in contact with the link plate 320 is configured to be capable of moving up and down, and the pressing of the link plate 320 is achieved only by means of the upward and downward movement of the pressing head.

In one embodiment, a spacer 50 is also provided between the fastener 40 and the first horizontal segment 11 to increase the contact area, reduce the pressure of the fastener 40 on the first horizontal segment 11, prevent damage to the first horizontal segment 11 due to overpressure, and prevent loosening.

According to one embodiment of the utility model, the compression assembly 13 comprises: a press block 131, a screw 132 and a bolt 133. The briquetting 131 sets up in the one side of first vertical section 12, is suitable for compressing tightly the link joint 320 of step chain, and bolt 133 sets up in the opposite side of first vertical section 12, and screw rod 132 runs through adjusting groove 101, and briquetting 131 and bolt 133 set up respectively at screw rod 132's both ends, and briquetting 131 and bolt 133's diameter is all greater than the distance between the inside slot wall of adjusting groove 101.

Referring to fig. 2b, the pressing blocks 131 and the bolts 133 are respectively provided at both sides of the first vertical section 12, and after the bolts 133 are tightened, the pressing blocks 131 and the bolts 133 are simultaneously pressed against both surfaces of the first vertical section 12, thereby achieving the fixation of the current position of the pressing assembly 13. During adjustment, the screw 132 can move up and down in the adjustment groove 101 by screwing the bolt 133. The pressing block 131 may be fixed at one end of the screw 132, or inserted into one end of the screw 132, and the utility model is not limited to the fixing form of the two.

It should be noted that in some embodiments, the length of the first vertical section 12 must be greater than the width of the link plate 320, i.e., the hold-down assembly 13 disposed on top of the first vertical section 12 may be located above the link plate 320 after the first vertical section 12 passes through the chain.

According to one embodiment of the utility model, a width of a portion of the first vertical section 12 is less than or equal to a distance between adjacent two rollers 310 of the step chain 300, and a length of a portion of the first vertical section 12 is greater than or equal to a diameter of a roller 310 of the step chain.

The width of the portion of the first vertical segment 12 facing the rollers 310 is less than or equal to the distance between two adjacent rollers 310 in the step chain 300 so that the first vertical segment 12 can be smoothly inserted between two adjacent rollers 310.

Illustratively, when the width of a portion of the first vertical segment 12 facing the rollers 310 is equal to the distance between two adjacent rollers 310 in the step chain 300, the first vertical segment 12 is directly captured between two adjacent rollers 310, and after the first horizontal segment 11 is secured, a horizontal securing member may be assisted to limit the rollers 310 from approaching each other to limit the freedom of the step chain 300.

The portion of the first vertical section 12 facing the rollers 310 needs to have a length greater than or equal to the diameter of the rollers 310 of the step chain, which is more reasonably designed to cooperate with the horizontal fasteners to limit the freedom of the step chain 300.

In the present utility model, "the width of the first vertical section 12" refers to the length of the step chain 300 in the moving direction, and "the length of the first vertical section 12" refers to the length perpendicular to the moving direction of the step chain 300.

According to one embodiment of the present utility model, the first horizontal segment 11 and the first vertical segment 12 are each symmetrically disposed about a first straight line on which the adjustment groove 101 is disposed, the first straight line being perpendicular to the direction of movement of the step chain 300.

It will be appreciated that the vertical fixing member 10 is a part symmetrical about a first straight line, which is the symmetry axis, and the adjustment groove 101 is provided on the symmetry axis, which facilitates the application of the pressing force to the link plate 320.

In some embodiments of the present utility model, the first mount 20 and the second mount 30 are mirror images.

In one embodiment, the first mount 20 and the second mount 30 each comprise: a second horizontal section and a second vertical section. At least a portion of the second horizontal segment is attached to the step rail 400 and is secured to the step rail 400 by the fastener 40, the second vertical segment is disposed between the rollers 310 of the step chain 300, and the second vertical segment is provided with either the first limit slot 201 or the second limit slot 301.

It will be appreciated that the second horizontal section of the first fixing member 20 and the second horizontal section of the second fixing member 30, which are mirror images, each extend in one direction, and the opening direction of the first limit slot 201 or the notch of the two limit slots is opposite.

Illustratively, referring to fig. 3, the horizontal fixture is also configured in an L-shape with a second horizontal section connected below the second vertical section and conforming to the step rail 400. When the horizontal fastener 40 is used, the second vertical section is inserted into the gap of the chain, the second horizontal section is attached to the lower surface of the step guide 400, the position of the first limit groove 201 or the second limit groove 301 is adjusted, the roller 310 is clamped into the first limit groove 201 or the second limit groove 301, and then the second horizontal section is fixed by the fastener 40.

It will be appreciated that the vertical fixing member 10 and the horizontal fixing member may be integrally formed or assembled, and thus, although the vertical fixing member 10 and the horizontal fixing member are shown as being L-shaped in the drawings, they may be in other shapes in practice.

In one embodiment, a spacer 50 is also provided between the fastener 40 and the second horizontal section to increase the contact area, reduce the pressure of the fastener 40 against the second horizontal section, prevent damage to the second horizontal section due to overpressure, and prevent loosening.

According to one embodiment of the utility model, a width of a portion of the second vertical segment is less than or equal to a distance between adjacent two rollers 310 of the step chain 300, and a length of a portion of the second vertical segment is greater than or equal to a diameter of the rollers 310 of the step chain, the first limit groove 201 or the second limit groove 301 being disposed on a portion of the second vertical segment.

The width of the portion of the second vertical segment that faces the rollers 310 is less than or equal to the distance between two adjacent rollers 310 in the step chain 300 so that the second vertical segment can be smoothly inserted between two adjacent rollers 310.

Since the first limit groove 201 or the second limit groove 301 needs to be formed on a portion of the first vertical section 12 opposite to the roller 310, the length of the first limit groove needs to be greater than or equal to the diameter of the roller 310 of the step chain. Further, the notches of the first limit groove 201 and the second limit groove 301 are each provided with a smooth transition section 21 connected with another part of the first vertical section 12. In combination with the schematic cooperation between the horizontal fixing member and the roller 310 in fig. 3 and 5, the notch of the first limiting groove 201 has a guiding function, and the smooth transition section 21 of the roller 310 Yi Shun slides into the notch of the first limiting groove 201 and is engaged with the roller 310.

According to one embodiment of the present utility model, the notch directions of the first and second limiting grooves 201 and 301 are disposed away from each other.

Preferably, the vertical fixing member 10 is installed between the first fixing member 20 and the second fixing member 30. When the vertical fixing member 10 is installed between the first fixing member 20 and the second fixing member 30, there is a good fixing effect on the step chain 300, i.e., the pressing assembly 13 has a certain friction force to the link plate 320 in the opposite direction to the movement of the step chain 300 while preventing the link plate 320 from jumping up and down after pressing the link plate 320. However, since the friction force is too small to overcome the sliding of the step chain 300, the friction force cooperates with the first fixing member 20 and the second fixing member 30 located at both sides of the vertical fixing member 10, and even if the movement of the step chain 300 occurs, the horizontal fixing member notches at both sides are disposed away from each other, so that the roller 310 on the step chain 300 is limited, and thus the step chain 300 is prevented from sliding.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims (11)

1. A fixed tooling for an escalator step chain adapted to compress rollers against a step rail by the step chain, comprising:

the vertical fixing piece is arranged between the rollers of the step chain and fixed on the step guide rail, and a pressing assembly for pressing the chain plate of the step chain is arranged on the vertical fixing piece;

a horizontal fixing member disposed between the rollers of the step chain and fixed to the step rail,

the horizontal fixing piece comprises a first fixing piece and a second fixing piece, a first limit groove is arranged on the first fixing piece, the first limit groove is clamped and fixed with one roller of the step chain, a second limit groove is arranged on the second fixing piece, the second limit groove is clamped and fixed with the other roller of the step chain,

the notch directions of the first limiting groove and the second limiting groove are both arranged in the movement direction of the step chain and face opposite directions, so that rollers of the step chain are limited to be close to each other.

2. The fixture of claim 1, wherein the compression force of the compression assembly is adjustable.

3. The fixture of claim 2, wherein the vertical fixture comprises:

a first horizontal segment, at least a portion of which is attached to the step rail and secured thereto by a fastener;

the vertical section of first, vertical section sets up between the roller of step chain, the top of vertical section of first is seted up along perpendicular to the ascending regulation recess of motion direction of step chain, compress tightly the subassembly optionally and be in the regulation recess is internal to adjust the packing force.

4. A fixture according to claim 3, wherein the compression assembly comprises:

the pressing block is arranged on one side of the first vertical section and is suitable for pressing a chain plate of the step chain;

the screw rod and the bolt are arranged on the other side of the first vertical section, the screw rod penetrates through the adjusting groove, the pressing block and the bolt are respectively arranged at two ends of the screw rod,

the diameters of the pressing block and the bolt are larger than the distance between the inner groove walls of the adjusting groove.

5. The fixture of claim 3, wherein a width of a portion of the first vertical segment is less than or equal to a distance between rollers of adjacent two of the step chain, and a length of a portion of the first vertical segment is greater than or equal to a roller diameter of the step chain.

6. The fixture of claim 3, wherein the first horizontal segment and the first vertical segment are each symmetrically disposed about a first line, the adjustment groove is disposed on the first line, and the first line is perpendicular to a direction of movement of the step chain.

7. The fixture of any one of claims 1-6, wherein the first fixture and the second fixture are mirror images.

8. The fixture of claim 7, wherein the first fixture and the second fixture each comprise:

the second horizontal section is at least partially attached to the step guide rail and is fixed on the step guide rail through a fastener;

the second vertical section is arranged between the rollers of the step chain, and the first limit groove or the second limit groove is arranged on the second vertical section.

9. The fixture of claim 8, wherein a width of a portion of the second vertical segment is less than or equal to a distance between adjacent two rollers of the step chain, and a length of a portion of the second vertical segment is greater than or equal to a roller diameter of the step chain,

the first limit groove or the second limit groove is provided on a portion of the second vertical section.

10. The fixture of claim 1, wherein the notch directions of the first and second limiting grooves are set away from each other.

11. The fixture of claim 10, wherein the vertical fixture is mounted between the first fixture and the second fixture.