阅读说明：本技术 一种自锚式重力加压重复加固的轨道交通铁轨固定支座 (Self-anchored gravity-pressurized repeated-reinforcement rail traffic fixing support ) 是由 汪刚 于 2020-07-29 设计创作，主要内容包括：本发明公开了一种自锚式重力加压重复加固的轨道交通铁轨固定支座,包括轨枕、定位螺栓、轨道本体、压板和气囊,所述轨枕的顶部嵌入式安装有定位套,且轨枕的边缘处上方设置有定位座,所述定位块之间转轴连接有加固筋,且加固筋的端部铰接安装有限位条,所述定位螺栓的下端贯穿定位座设置于定位套的内部,且定位螺栓的上端固定连接有限位螺帽,所述轨道本体设置于定位座的顶部中心处,且轨道本体的中部两侧外壁上螺栓固定有固定件的一端。该自锚式重力加压重复加固的轨道交通铁轨固定支座,减少轨道使用时振动对加固稳定性的不利影响,并且能够在火车行驶时进行持续性的支座加固,提高其加固的便利性,不会造成加固结构的松动掉落。(The invention discloses a self-anchored gravity-pressurized repeatedly-reinforced rail transit rail fixing support which comprises a sleeper, positioning bolts, a rail body, a pressing plate and an air bag, wherein a positioning sleeve is embedded in the top of the sleeper, a positioning seat is arranged above the edge of the sleeper, a reinforcing rib is connected between the positioning blocks through a rotating shaft, a limiting strip is hinged to the end part of the reinforcing rib, the lower end of each positioning bolt penetrates through the positioning seat and is arranged in the positioning sleeve, a limiting nut is fixedly connected to the upper end of each positioning bolt, the rail body is arranged in the center of the top of the positioning seat, and one end of a fixing piece is fixed on the outer wall of the two sides of the middle of the rail body through. This repeated reinforced (rfd) track traffic rail fixing support from anchor formula gravity pressurization reduces the adverse effect of vibration to strengthening stability when the track uses to can carry out the support reinforcement of continuation when the train traveles, improve its reinforced convenience, can not cause reinforced structure's not hard up to drop.)

1. The utility model provides a repeated reinforced (rfd) track traffic rail fixing support from anchor formula gravity pressurization, includes sleeper (1), positioning bolt (7), track body (9), clamp plate (17) and gasbag (25), its characterized in that: the top of the sleeper (1) is embedded with a positioning sleeve (2), a positioning seat (3) is arranged above the edge of the sleeper (1), a positioning block (4) is fixedly connected to the edge of the top of the positioning seat (3), a reinforcing rib (5) is connected between the positioning blocks (4) in a rotating shaft manner, a limiting strip (6) is hinged to the end portion of the reinforcing rib (5), the lower end of a positioning bolt (7) penetrates through the positioning seat (3) and is arranged inside the positioning sleeve (2), a limiting nut (8) is fixedly connected to the upper end of the positioning bolt (7), a track body (9) is arranged at the center of the top of the positioning seat (3), one end of a fixing piece (10) is fixed on the outer walls of two sides of the middle of the track body (9) through a bolt, an inner hollow plate (11) is fixedly arranged at the other end of the fixing piece (10), and a support leg (12, the connecting end of the supporting leg (12) and the inner hollow plate (11) is fixedly connected with one end of a connecting arm (13), a transmission ring (14) is mounted at the other end of the connecting arm (13) through a bearing, and the outer side wall of the limiting nut (8) is sleeved with the transmission ring (14).

2. A self-anchoring gravity-loaded re-reinforcing railroad rail attachment bracket as defined in claim 1, wherein: the middle part of positioning seat (3) sets up to concave structure, and vertical coaxial distribution between positioning seat (3) and track body (9) to the bilateral symmetry of positioning seat (3) distributes and has reinforcement muscle (5) and positioning bolt (7), and positioning bolt (7) and the vertical block setting of reinforcement muscle (5) moreover.

3. A self-anchoring gravity-loaded re-reinforcing railroad rail attachment bracket as defined in claim 1, wherein: all constitute relative rotation structure between reinforcement muscle (5) and spacing (6) and locating piece (4), and spacing (6) set up to "L" style of calligraphy structure to laminating between the bottom edge of "L" interior corner of spacing (6) and track body (9) is connected.

4. A self-anchoring gravity-loaded re-reinforcing railroad rail attachment bracket as defined in claim 1, wherein: the link arm (13) sets up to annular structure with the link of transmission ring (14), and constitutes the revolution mechanic of bearing installation between link arm (13) and transmission ring (14) to run through on the inner wall of transmission ring (14) and install stopper (15), the run through junction of stopper (15) and transmission ring (14) is fixed with first elastic component (16) moreover, and the outer wall of transmission ring (14) sets up to the sawtooth structure of annular distribution simultaneously.

5. A self-anchoring gravity-loaded re-reinforcing railroad rail attachment bracket as defined in claim 4, wherein: stopper (15) are at the inside left and right sides symmetric distribution of driving ring (14), and the inside wall of stopper (15) sets up to "V" style of calligraphy breach column structure to the block is connected between the outer wall of "V" style of calligraphy breach structure and stop nut (8) of stopper (15), is vertical coaxial fixed connection between the upper end of stop nut (8) and positioning bolt (7) moreover.

6. A self-anchoring gravity-loaded re-reinforcing railroad rail attachment bracket as defined in claim 1, wherein: the lower extreme of clamp plate (17) is articulated to be installed in the top edge of interior hollow plate (11), and articulated on the inside wall of clamp plate (17) have the one end of connecting rod (18) to the other end pivot of connecting rod (18) is connected with violently pipe (19), and violently pipe (19) and the inside of interior hollow plate (11) run through the setting in addition, violently pipe (19) simultaneously and lie in the inside one end of interior hollow plate (11) and be fixed with slider (20), fixedly connected with second elastic component (21) between the inner wall of slider (20) and violently pipe (19).

7. A self-anchoring gravity-loaded re-reinforcing railroad rail attachment bracket as defined in claim 6, wherein: slider (20) and the inside of interior vacancy board (11) between for the block sliding connection that runs through, the setting of cavity column structure is in slider (20), and the inside of slider (20) runs through and installs sawtooth block (22), and sawtooth block (22) and slider (20) constitute relative extending structure, and sawtooth block (22) are located the cover on the tip outer wall in slider (20) and are equipped with rubber circle (23) moreover, are fixed with third elastic component (24) between the inside of sawtooth block (22) and slider (20) simultaneously.

8. A self-anchoring gravity-loaded re-reinforcing railroad rail attachment bracket as defined in claim 7, wherein: one side of the sawtooth block (22), which is close to the end part of the transverse pipe (19), is provided with a bevel-shaped structure, the transverse pipe (19) and the slide block (20) are communicated with each other, and the outer wall of the sawtooth end of the sawtooth block (22) is meshed with the outer wall of the transmission ring (14).

9. A self-anchoring gravity-loaded re-reinforcing railroad rail attachment bracket as defined in claim 1, wherein: the air bags (25) are fixedly arranged between the pressing plate (17) and the inner hollow plate (11), the air bags (25) are distributed in a fan-shaped structure, and threaded hoses (26) are connected between the bottoms of the air bags (25) and the outer walls of the end parts of the transverse pipes (19) in a penetrating manner.

Technical Field

The invention relates to the technical field of rail transit, in particular to a self-anchored gravity-loaded repeatedly-reinforced rail transit fixing support.

Background

Modern rail transit construction provides the foundation stone of quick interchange for scientific and technological development and logistics transportation, rail transit's construction, the traffic track of the supplementary location of needs installation, transport and the removal for vehicle provide accurate direction road, for the convenience of the installation location of rail, improve the orbital positional stability of rail, prevent that it from appearing the not hard up that leads to because of vibration and external force factor when using for a long time, need be at orbital and the supplementary centre gripping of handing-over department installation of sleeper and reinforced structure, maintain orbital stability in use and work effect, carry out vehicle's stable direction transport.

However, the prior rail transit rail fixing support has the following problems when in use:

1. the rail is directly clamped and reinforced in a bolt reinforcing mode, and due to the arrangement of the positioning mode, under the vibration effect generated during the operation of the rail in use, the rail is loosened and unstable in positioning, so that the use defect exists, the external force deformation amplitude of the fixed support is large, and the normal use is influenced;

2. the mounting and reinforcing mode of the fixed support is complex, kinetic energy of the rail transit transport means cannot be fully and effectively utilized, after long-term use, artificial reinforcement for supporting is needed, reinforcement omission is easily generated, and the potential safety hazard of use of the rail is large.

Aiming at the problems, innovative design is urgently needed on the basis of the original rail fixing support for the rail transit.

Disclosure of Invention

The invention aims to provide a self-anchored gravity-pressurized repeatedly-reinforced rail transit fixing support, which solves the problems that the prior rail transit fixing support in the background art directly clamps and reinforces a rail in a bolt reinforcing mode, the positioning mode is arranged, the rail is loosened and unstable in positioning under the vibration action generated by the operation of the rail during use, the use defect exists, the external force deformation amplitude of the fixing support is large, the reinforcing mode is complicated, the kinetic energy of a rail transit transport tool cannot be fully and effectively utilized, after the rail transit fixing support is used for a long time, artificial supporting reinforcement is needed, reinforcement omission is easy to generate, and the use potential safety hazard of the rail is large.

In order to achieve the purpose, the invention provides the following technical scheme: a self-anchored gravity-pressurized repeatedly-reinforced rail transit rail fixing support comprises a sleeper, a positioning bolt, a rail body, a pressing plate and an air bag, wherein a positioning sleeve is embedded in the top of the sleeper, a positioning seat is arranged above the edge of the sleeper, a positioning block is fixedly connected to the edge of the top of the positioning seat, a reinforcing rib is connected between the positioning blocks in a rotating shaft mode, a limiting strip is hinged to the end portion of the reinforcing rib, the lower end of the positioning bolt penetrates through the positioning seat and is arranged inside the positioning sleeve, a limiting nut is fixedly connected to the upper end of the positioning bolt, the rail body is arranged in the center of the top of the positioning seat, one end of a fixing piece is fixed to the outer walls of the two sides of the middle of the rail body through bolts, an inner hollow plate is fixedly arranged at the other end of the fixing piece, a supporting leg is fixedly connected to, and the other end bearing of the connecting arm is provided with a transmission ring, and the transmission ring is sleeved on the outer side wall of the limit nut.

Preferably, the middle part of the positioning seat is arranged to be of a concave structure, the positioning seat and the track body are vertically and coaxially distributed, reinforcing ribs and positioning bolts are symmetrically distributed on two sides of the positioning seat, and the positioning bolts and the reinforcing ribs are vertically clamped.

Preferably, all constitute relative revolution mechanic between reinforcement muscle and spacing strip and the locating piece, and spacing strip sets up to "L" style of calligraphy structure to the laminating is connected between the bottom edge of "L" interior corner of spacing strip and track body.

Preferably, the link arm sets up to annular structure with the link of transmission ring, and constitutes the revolution mechanic of bearing installation between link arm and the transmission ring to run through on the inner wall of transmission ring and install the stopper, the run-through connection department of stopper and transmission ring is fixed with first elastic component moreover, and the outer wall of transmission ring sets up to the cockscomb structure that the annular distributes simultaneously.

Preferably, the stopper is in the inside left and right sides symmetric distribution of drive ring, and the inside wall of stopper sets up to "V" style of calligraphy breach column structure to the block is connected between the outer wall of "V" style of calligraphy breach structure and the stop nut of stopper, is vertical coaxial fixed connection between the upper end of stop nut and positioning bolt moreover.

Preferably, the lower extreme of clamp plate is articulated to be installed in the top edge of interior cavity board, and articulated on the inside wall of clamp plate have the one end of connecting rod to the other end pivot of connecting rod is connected with violently the pipe, violently the pipe runs through the setting with the inside of interior cavity board moreover, violently the pipe lies in the inside one end of interior cavity board and is fixed with the slider simultaneously, fixedly connected with second elastic component between the inner wall of slider and violently pipe.

Preferably, the inside of slider and interior cavity board is for the block sliding connection that runs through between, and the cavity column structure setting in the slider, and the inside of slider runs through and installs the sawtooth piece to the sawtooth piece constitutes relative extending structure with the slider, and the sawtooth piece is located the cover and is equipped with the rubber circle on the tip outer wall in the slider moreover, is fixed with the third elastic component between the inside of sawtooth piece and slider simultaneously.

Preferably, one side of the sawtooth block, which is close to the end part of the transverse pipe, is provided with a bevel-shaped structure, the transverse pipe and the sliding block are communicated with each other, and the outer wall of the sawtooth end of the sawtooth block is in meshed connection with the outer wall of the transmission ring.

Preferably, the air bags are fixedly installed between the pressing plate and the inner hollow plate and distributed in a fan-shaped structure, and threaded hoses are connected between the bottoms of the air bags and the outer walls of the end parts of the transverse pipes in a penetrating mode.

Compared with the prior art, the invention has the beneficial effects that: the self-anchored gravity-pressurized repeatedly-reinforced rail transit rail fixing support reduces the adverse effect of vibration on the reinforcing stability when a rail is used, can continuously reinforce the support when a train runs, improves the reinforcing convenience, and cannot cause the loosening and falling of a reinforcing structure;

1. the use and installation angles of the reinforcing ribs and the limiting strips can be conveniently adjusted and changed only through the rotating installation structure action of the reinforcing ribs and the limiting strips, so that the reinforcing ribs and the limiting strips synchronously act to carry out downward pressurization type installation and positioning of the track, the through installation of bolts is utilized, the limiting effect of the reinforcing ribs is achieved, the positioning effect and the clamping effect are improved, the self toughness property of the reinforcing ribs is utilized, the looseness of the fixing structure of the reinforcing ribs caused by the working vibration of the track in long-term use is avoided, the service life of the reinforcing ribs is prolonged, continuous and effective normal work is carried out, and the reinforcing ribs are convenient to disassemble, assemble and replace when the local structure generates damage shadow response;

2. utilize the wheel power of motion of traveling of train, make the clamp plate carry out relative upset motion with interior cavity board, reach the angle modulation of clamp plate and the compression deformation of gasbag, utilize motion between them to make slider and sawtooth piece do the block respectively and slide and concertina movement, reach the meshing transmission that carries out unidirectional motion to the drive ring under synchronization action between them, make the drive ring carry out the rotary motion of single rotation to, stopper and spacing nut block connection effect inside the drive ring, make spacing nut and positioning bolt carry out synchronous revolution, reach the installation reinforcing effect who carries out fixing support, and stopper and the relative extending structure setting of drive ring, can avoid spacing nut and positioning bolt to appear smooth silk phenomenon when rotatory extremely.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of a reinforcing bar mounting structure according to the present invention;

FIG. 3 is a schematic view of the platen and bladder mounting arrangement of the present invention;

FIG. 4 is a schematic view of a mounting structure of the sawtooth block of the present invention;

FIG. 5 is a schematic view of a side view of the installation of the limiting block of the present invention;

FIG. 6 is a schematic view of a top view of the installation of the limiting block of the present invention.

In the figure: 1. a sleeper; 2. a positioning sleeve; 3. positioning seats; 4. positioning blocks; 5. reinforcing ribs; 6. a limiting strip; 7. positioning the bolt; 8. a limit nut; 9. a track body; 10. a fixing member; 11. an inner hollow plate; 12. a support leg; 13. a connecting arm; 14. a drive ring; 15. a limiting block; 16. a first elastic member; 17. pressing a plate; 18. a connecting rod; 19. a transverse tube; 20. a slider; 21. a second elastic member; 22. a sawtooth block; 23. a rubber ring; 24. a third elastic member; 25. an air bag; 26. a threaded hose.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: a self-anchored gravity-loaded repeatedly-reinforced rail transit rail fixing support comprises a sleeper 1, a positioning sleeve 2, a positioning seat 3, a positioning block 4, a reinforcing rib 5, a limiting strip 6, a positioning bolt 7, a limiting nut 8, a rail body 9, a fixing part 10, an inner hollow plate 11, a support leg 12, a connecting arm 13, a transmission ring 14, a limiting block 15, a first elastic part 16, a pressing plate 17, a connecting rod 18, a transverse pipe 19, a sliding block 20, a second elastic part 21, a sawtooth block 22, a rubber ring 23, a third elastic part 24, an air bag 25 and a threaded hose 26, wherein the positioning sleeve 2 is embedded in the top of the sleeper 1, the positioning seat 3 is arranged above the edge of the sleeper 1, the positioning block 4 is fixedly connected to the edge of the top of the positioning seat 3, the reinforcing rib 5 is connected to a rotating shaft between the positioning blocks 4, the limiting strip 6 is hinged to the end of the reinforcing rib 5, the lower end of the positioning, and the upper end fixedly connected with limit nut 8 of positioning bolt 7, track body 9 sets up in the top center department of positioning seat 3, and the bolt fastening has the one end of mounting 10 on the middle part both sides outer wall of track body 9, and the other end fixed mounting of mounting 10 has interior hollow plate 11, and the bottom fixedly connected with stabilizer blade 12 of interior hollow plate 11, the one end of stabilizer blade 12 and the link fixedly connected with linking arm 13 of interior hollow plate 11, and the other end bearing of linking arm 13 installs drive ring 14, and drive ring 14 cover is located on limit nut 8's the lateral wall.

The middle part of positioning seat 3 sets up to concave column structure, and vertical coaxial distribution between positioning seat 3 and the track body 9 to the bilateral symmetry of positioning seat 3 distributes and has reinforcing rib 5 and positioning bolt 7, and positioning bolt 7 sets up with the vertical block of reinforcing rib 5 in addition, makes things convenient for the supplementary installation location of track body 9 to place, and the stable reinforcement of reinforcing rib 5.

All constitute relative revolution mechanic between reinforcement muscle 5 and spacing 6 and locating piece 4, and spacing 6 sets up to "L" style of calligraphy structure to the laminating is connected between the bottom edge of "L" interior turning of spacing 6 and track body 9, conveniently adds reinforcement muscle 5 and spacing 6 above that and carries out the angle rotation adjustment change, makes reinforcement muscle 5 and spacing 6 stabilize effective extrusion pressurization location to the bottom edge of track body 9.

The connecting end of the connecting arm 13 and the transmission ring 14 is set to be an annular structure, a rotating structure for bearing installation is formed between the connecting arm 13 and the transmission ring 14, a limiting block 15 is installed on the inner wall of the transmission ring 14 in a penetrating mode, a first elastic part 16 is fixed at the penetrating connection position of the limiting block 15 and the transmission ring 14, the outer wall of the transmission ring 14 is set to be a saw-toothed structure in annular distribution, the limiting blocks 15 are symmetrically distributed on the left side and the right side of the inner portion of the transmission ring 14, the inner side wall of the limiting block 15 is set to be a V-shaped notch-shaped structure, the V-shaped notch structure of the limiting block 15 is connected with the outer wall of the limiting nut 8 in a clamping mode, the limiting nut 8 is fixedly connected with the upper end of the positioning bolt 7 in a vertical coaxial mode, the limiting nut 8 is conveniently in clamping contact with the limiting nut 8 by utilizing the effects of, after the limit nut 8 and the positioning bolt 7 rotate to the limit point, the limit block 15 makes telescopic movement, and the rotating sliding of the positioning bolt 7 cannot be caused.

The lower extreme of clamp plate 17 articulates and installs in the top edge of interior hollow plate 11, and the articulated one end that has connecting rod 18 on the inside wall of clamp plate 17 to the other end pivot of connecting rod 18 is connected with violently pipe 19, and violently pipe 19 runs through the setting with the inside of interior hollow plate 11 in addition, and the one end that violently pipe 19 lies in interior hollow plate 11 inside is fixed with slider 20 simultaneously, fixedly connected with second elastic component 21 between the inner wall of slider 20 and violently pipe 19.

The sliding block 20 is in through clamping sliding connection with the inside of the inner hollow plate 11, the sliding block 20 is provided with a hollow structure, a sawtooth block 22 is installed in the sliding block 20 in a penetrating mode, the sawtooth block 22 and the sliding block 20 form a relatively telescopic structure, a rubber ring 23 is sleeved on the outer wall of the end portion, located in the sliding block 20, of the sawtooth block 22, a third elastic piece 24 is fixed between the sawtooth block 22 and the inside of the sliding block 20, the sawtooth block 22 is provided with a beveling structure close to one side of the end portion, facing the transverse pipe 19, of the transverse pipe 19, the transverse pipe 19 is communicated with the inside of the sliding block 20, the outer wall of the sawtooth end of the sawtooth block 22 is in meshing connection with the outer wall of the transmission ring 14, the air bag 25 is fixedly installed between the pressing plate 17 and the inner hollow plate 11 and distributed in a sector structure, a threaded hose 26 is connected between the bottom of the air bag 25 and the outer wall of, the position of the sliding block 20 is moved, the sawtooth block 22 on the sliding block 20 is meshed with the outer wall of the transmission ring 14, so that the transmission ring 14 and the limit nut 8 synchronously rotate, the sawtooth block 22 and the sliding block 20 can be synchronously controlled to do relative telescopic motion, the transmission ring 14 is prevented from being meshed and rotated in a reciprocating mode when the sawtooth block 22 continuously protrudes, and the initial state is returned.

The working principle is as follows: when the self-anchored gravity-pressurized repeatedly-reinforced rail transit rail fixing support is used, firstly, as shown in figure 1-2, after a rail body 9 is placed and positioned in a concave structure at the center of the top of a positioning seat 3, the arrangement angles of a reinforcing rib 5 and a limiting strip 6 are changed through the rotary connection between the reinforcing rib 5 and a positioning block 4 and the limiting strip 6, so that the reinforcing rib 5 performs compression-type reinforcing and positioning on the rail body 9 placed on the positioning seat 3 through the limiting strip 6, meanwhile, through connection between a positioning bolt 7 and the positioning seat 3 and the threaded connection between the positioning bolt and a positioning sleeve 2 are utilized, as shown in figure 2, the positioning bolt 7 can apply vertical and downward external force to the reinforcing rib 5, the final fixing effect of the reinforcing rib 5 on the rail body 9 is achieved, the installation of the reinforcing rib 5 and the toughness of the reinforcing rib can perform damping clamping on the rail body 9 in use, the stable effect of the installation and the positioning of the track body 9 is improved, and the clamping looseness caused by vibration is reduced;

according to the figure 1 and the figure 3-6, after the auxiliary installation, clamping and positioning of the track body 9, when the wheel of the train rolls on the top of the track body 9, the wheel can apply a downward pushing force to the pressing plate 17, as shown in the figure 3-4, the pressing plate 17 and the inner hollow plate 11 are connected and relatively overturned due to the connection of the rotating shaft, so that the air bag 25 is deformed, air in the air bag 25 is led into the inside of the sliding block 20 through the threaded hose 26, the internal pressure of the sliding block 20 is increased, the purpose of the relative telescopic movement of the sawtooth block 22 and the sliding block 20 is achieved, the sawtooth side of the sawtooth block 22 is exposed from the inside of the sliding block 20, and at the same time, as shown in the figure 3-6, the pressing plate 17 rotates and pushes the sliding block 20 and the sawtooth block 22 to be clamped with the inner hollow plate 11 through the connecting rod 18 to relatively slide, so as to change the positions of, the sawtooth block 22 is meshed with the outer wall of the transmission ring 14 in the moving process, so that the transmission ring 14 and the connecting arm 13 perform relative rotary motion, the limit block 15 in the transmission ring 14 is clamped with the outer wall of the limit nut 8, the limit nut 8 and the positioning bolt 7 perform synchronous rotary motion, the positioning and reinforcing of the positioning bolt 7 are performed, when the positioning bolt 7 rotates to a limit point, the limit block 15 and the positioning bolt 7 are blocked in clamping collision and relatively extend and retract with the transmission ring 14 under the action of the first elastic part 16, the connection and slipping effect of the limit block 15 and the positioning bolt 7 is achieved, the sliding wire of the mounting and reinforcing of the positioning bolt 7 is avoided, and simultaneously, as shown in figures 3-4, after the train runs, the slide block 20 and the sawtooth block 22 are reset after being mounted under the action of the second elastic part 21 and the third elastic part 24, the sawtooth blocks 22 are prevented from being meshed with the outer wall of the transmission ring 14 again when being protruded and reset, so that the rotation motion reset of the transmission ring 14 is caused, and the reinforcement of the positioning bolt 7 is prevented from being influenced.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.