JP2003112882A - Moving walkway - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the irregular movement of pallets. SOLUTION: This moving walkway comprises an approximately horizontal moving path 11 having two circular turning parts and a carrying part connecting both turning parts, a number of pallets 3 arranged on the moving path 11 in a forward tilting manner for circulating the moving path 11 in one direction, a turnable screw rod 16 arranged at a portion of the carrying part of the moving path 11 near the downstream side in the moving direction of the pallets 3, thrust transmitting members 18 individually provided on the pallets 3 and engageable with thread grooves of the screw rod 16, string members 22 for connecting the front and rear pallets 3, and a tension adjusting mechanism 40 using a torsion bar for adjusting tension on the string members 22.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving walkway installed in a public facility such as an airport or a station yard, and more particularly to transporting a user in two opposite directions. About moving sidewalks. 2. Description of the Related Art Generally, a moving sidewalk has two rails 11 arranged in an annular shape, as shown in FIGS. A number of pallets 3 that can rotate clockwise, a chain 22 of string-like members connecting the pallets 3 adjacent in front and rear,
And screw rods 16, 19, and 24 that can move the rails in the extension direction of the rail 11. [0003] First, the configuration of the rail 11 and the guide rail 12 attached thereto will be described with reference to FIGS. [0004] The rail 11 includes two linear transport sections 1A and 1B arranged in parallel and horizontally to each other, a semicircular turning section 1C connected to one end of both transport sections 1A and 1B,
A semicircular turning part 1D connected to the other ends of both transport parts 1A and 1B.
The predetermined portion of the rail 11 is
4 is laid on a stand 23 erected at 4. A guide rail 12 bent in a semicircular shape along the rail 11 is provided on the outside of the rail 11 on the outer side in the radial direction of the turning parts 1C and 1D and on the inner side of the rail 11 on the inner side in the radial direction. A predetermined portion of the guide rail 12 is supported from above by a column 13 erected on a base 14. Further, the turning portions 1C, 1 of the rail 11
D and the guide rails 12 are entirely covered from above by platforms 2A and 2B for getting on and off.
Here, in FIGS. 9 and 10, 2C is a fixed step extending from the platform 2A, 2B for getting on and off, and 2D is a movable step extending from the fixed step 2C. Next, the structure of the pallet 3 and the members attached thereto will be described with reference to FIGS. The pallet 3 has a long flat plate-shaped pallet body 3A extending in the moving direction thereof, and is formed on the upper surface of the pallet body 3A from the front end to the rear end in the moving direction and is formed at equal intervals in the width direction. A plurality of lower protruding portions 3b are formed on the lower surface of the pallet body 3A and extend from the front end in the moving direction to a portion near the rear end.
The positions of the upper ridge portion 3a and the lower ridge portion 3b with respect to the pallet body 3A are shifted by a half pitch when viewed from the front and rear in the moving direction. A groove is formed in a rear end portion of the pallet body 3A in the moving direction so as to have a wedge shape so that the thickness of the side surface shape gradually decreases toward the rear side in the moving direction, and is formed between the upper protrusions 3a of the other pallet body 3A. An edge member 3B that can be fitted into 3c is connected. On the other hand, a beam 5 extending in the width direction is fixed to a lower portion of each pallet main body 3A via a bracket 4b attached by an attaching member 4a, and the beam 5 is rearward in the pallet 3 traveling direction. Is provided with running rollers 6 capable of rolling on the upper surface of the rail 11 via downward brackets 7, and an upper bracket attached to a substantially L-shaped arm 8 is provided at both ends of the beam 5. 9 is provided with a roller 10 for correcting the inclination angle, which can roll on the lower surface of the guide rail 12 via the guide rail 12. A traversing regulating roller 21 is provided that can roll the opposing side surfaces of each rail 11 via the bracket 15a directed toward the rail. A moving roller (thrust transmitting member) 18 is pivotally supported at the center of the beam 5 on the rear side of the pallet 3 in the direction of travel of the pallet 3 via a supporting portion 17 which hangs downward. A plate 4d facing rearward in the traveling direction of the pallet 3 is provided at a position, and a pivot 4c of a rotating body facing rearward in the traveling direction of the pallet 3 is provided at a position adjacent to the plate 4d in the beam 5. Further, two arms 4e are formed at the center of the beam 5 on the front side in the traveling direction of the pallet 3 so as to project forward in the moving direction and to be able to fit the pivot 4c of another pallet 3. Next, the screw rods 16, 19, 24
This will be described with reference to FIGS. 9, 14, and 16 to 18. The screw rods 16 are positioned parallel to the turning section 1D of the conveying section 1A of the rail 11 and the turning section 1C of the conveying section 1B of the rail 11 in parallel between the left and right rails 11. The end of the screw rod 16 is connected to the gantry 2 as shown in FIG.
3, and is rotatably supported by a bearing 20 so that torque is transmitted from a motor (not shown). The pitch of the thread groove 16a of the screw rod 16 is set so as to gradually narrow in the order of the high speed range L1, the low speed range M1, and the getting on / off range S1 from the upstream end toward the downstream in the moving direction of the pallet 3. ing. Further, the screw rod 19 is connected to the rail 1
1 transport section 1A, and the transport section 1B of the rail 11
The screw rod 24 is disposed at two places with the middle part of the rail so as to be positioned in parallel between the left and right rails 11.
The rail 11 is disposed so as to be positioned in parallel between the left and right rails 11 at two positions, a portion near the turning portion 1C of the transfer portion 1A and a portion near the turning portion 1D of the transfer portion 1B of the rail 11, Similarly to the screw rod 16, the end of the screw rod 19 and the end of the screw rod 24 are pivotally supported on the gantry 23 via bearings (not shown), and rotational force is supplied from a motor (not shown). To be transmitted. The screw groove 19a of the screw rod 19
Is set equal to the pitch of the thread groove 24a in the high speed range L1 of the screw rod 16, and the pitch of the thread groove 24a of the screw rod 24 is from the upstream end to the downstream end in the pallet 3 moving direction. , The getting-on / off range S1, the low-speed range M1, and the high-speed range L1 are set so as to gradually expand. Next, a tension adjusting mechanism 25 and a swivel mechanism 26 provided at one connecting portion between the pallet 3 and the chain 22 will be described with reference to FIGS. The tension adjusting mechanism 25 has one end opened and an outer cylinder 27 having a spring seat 27a on the inner periphery at the other end, and an outer periphery at one end sandwiching the coil spring 28 between the spring seat 27a of the outer cylinder 27. The inner cylinder 29 is provided with a spring seat 29a and can slide inside the outer cylinder 27. The inner cylinder 29 is fastened to the inner cylinder 29 so as to penetrate the inner cylinder 29 and slidably passes through the spring seat 27a of the outer cylinder 27. And a connecting bolt 30 connected to a chain end 22 a of the chain 22.
The tension generated in the pallet 3 and the chain 22 by being compressed in the pulling direction 2 is buffered. Here, FIG.
Reference numeral 31 denotes a nut for adjusting the compression state of the coil spring 28 by adjusting the screwing state. The swivel mechanism 26 includes a lid-like member 32 fitted to one end of the outer cylinder 27 of the tension adjusting mechanism 25 on the open side, and a fork end 3 pivotally supported by a bracket 33 of the arm 8.
4 and a fork end bolt 36 that penetrates through the bottom of the lid 32 and is fastened by the nut 35 on the tension adjusting mechanism 25 side. Thus, the swivel mechanism 26 is configured to be rotatable between the fork end bolt 36 and the lid-like member 32 or between the fork end bolt 36 and the fork end 34, for example, when the chain 22 is loosened. Also rotate to eliminate the twist. Here, in FIG. 19, reference numeral 37 denotes a spring pin that connects the tension adjusting mechanism 25 and the swivel mechanism 26. On the other hand, the other connecting portion of the pallet 3 and the chain 22 is provided with the chain 2 at the position of the tension adjusting mechanism 25.
2, a substantially similar swivel mechanism 38 provided with an eye bolt (not shown), a clevis (not shown), etc.
Another pallet 3 is connected to the swivel mechanism 38. Thereby, the arm 8 attached to each pallet 3,
The arm 8 attached to another pallet 3 adjacent to the front and rear of the pallet 3 includes a bracket 33 and a tension adjusting mechanism 2.
5. It is connected via the swivel mechanisms 26, 38 and the chain 22. Hereinafter, the operation of the moving sidewalk will be described. When the screw rods 16, 19, and 24 are rotated by a motor (not shown), the screw grooves 16 are rotated.
The transfer roller 18 of the thrust transmitting member engaged with the a, 19a, 24a is sent out in a direction corresponding to the rotation of the screw rods 16, 19, 24. It moves along 1A and 1B. At this time, one transfer section 1A of the rail 11
And the other transport section 1B, the moving direction of the pallet 3 is reversed so that the pallet 3 moves forward and backward, and the front end of the pallet main body 3A of each pallet 3 is positioned in front of the pallet 3. 3 is inserted under the edge member 3B to form a continuous walking surface, and the user is simultaneously transported in two opposing directions by one moving sidewalk. Further, of the pallets 3 located at the transport sections 1A and 1B of the rail 11, the moving rollers 18
a, 19a, and 24a are not engaged with the screw rod 1 at the front of the pallet 3 in the moving direction.
Pallet 3 that moves with the rotation of 6, 19, 24,
It is pulled through the tension adjusting mechanism 25, the swivel mechanisms 26 and 38, and the chain 22. Here, the transport units 1A, 1
B, the moving speed of the pallet 3 is
Becomes higher as the vehicle shifts to the entry / exit range S1, the low-speed range M1, and the high-speed range L1 of the thread groove 24a.
8 decreases as the thread groove 16a transitions to the high-speed range L1, the low-speed range M1, and the entry / exit range S1. On the other hand, before the pallet 3 enters the turning portions 1C and 1D of the rail 11, the pallets 3 adjacent to the front and rear approach to each other, and the pivot 4c and the arm 4e of the bracket 4b are fitted together. Since the inclination angle correcting roller 10 rolls on the lower surface of the guide rail 12, each pallet 3 is inclined forward, and the fitting of the edge member 3B to the groove 3c of the pallet body 3A is released. Next, when the pallet 3 enters the turning parts 1C and 1D of the rail 11, as shown in FIGS.
The pallet 3 is sequentially moved toward the transport units 1A and 1B by the subsequent pallet 3 sequentially fed from the screw rod 16 while pressing the pivot 4c of the pallet 3 and pressing the plate 4d of the pallet main body 3A. Further, when the pallet 3 moves from the intermediate portion between the turning portions 1C and 1D of the rail 11 to the transporting portions 1A and 1B, the pallets 3 adjacent to each other are separated from each other and inclined with respect to the lower surface of the guide rail 12. Since the contact of the angle correcting roller 10 is released, the forward tilt state of each pallet 3 is eliminated, and the edge member 3B is connected to the groove 3 of the subsequent pallet body 3A.
c. However, if the coil spring 28 is used for the tension adjusting mechanism 25 for connecting the pallet 3 and the chain 22 as described above, the amplitude (repulsive force due to expansion and contraction) of the coil spring 28 is large. Therefore, there is a problem that the movement of the pallet 3 becomes irregular. Specifically, if the force acting on the coil spring 28 is constant and the force suddenly drops for some reason, the amplitude of the coil spring 28 causes the pallet 3 to suddenly move forward. The present invention has been made in view of the above circumstances, and has as its object to provide a moving sidewalk that suppresses irregular movement of a pallet. According to the present invention, there is provided a substantially horizontal moving path having two arc-shaped turning parts and a transporting part connecting the two turning parts, and a tiltable forward path on the moving path. A large number of pallets arranged and capable of circling the moving path in one direction, screw rods arranged and rotatable in a portion of the transporting section of the moving path downstream of the pallet moving direction, A movement including a thrust transmitting member engageable with the thread groove, a string-like member connecting the front and rear pallets, and a tension adjusting mechanism adjusting a tension applied to the string-like member by a torsion bar. Sidewalk,
It is related to. When a tension acts on the string-like member as the pallet moves, a torsional force acts on the torsion bar of the tension adjusting mechanism to buffer the tension generated on the pallet or the string-like member. Further, when the torsion force acting on the torsion bar suddenly comes off for some reason, the torsion elasticity of the torsion bar having a small amplitude prevents the pallet from suddenly moving forward. As described above, the tension adjusting mechanism is provided with the torsion bar having a small amplitude due to torsional elasticity, so that when a force acting on the string-like member is buffered, a large repulsive force such as expansion and contraction of a coil spring is eliminated. Can be suppressed from moving irregularly. Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 8 show an embodiment of the present invention. The same reference numerals as in FIGS. 9 to 21 denote the same parts. , The pallet 3, the members attached thereto, and the screw rods 16, 19, and 24 have substantially the same configuration. A tension adjusting mechanism 40 is provided at one connection portion between the pallet 3 and the chain 22. The tension adjusting mechanism 40 includes a cylindrical portion 41 having an upper end opened and a lower end closed, and a cylindrical portion 41 above the cylindrical portion 41. , A lower case 43 including an arm portion 42 extending from both sides is bolted to the arm 8 via a flange 44, and the cylindrical portion 41 of the lower case 43 and the arm portion 42
Between them, a lever 48 composed of a fork portion 46 for attaching the chain 22 of the cord-like member via the pin 45 and a lever body 47 having a predetermined diameter on the axis of the internal space of the cylindrical portion 41 is arranged. The upper case 5 having a cylindrical portion 49 with a closed upper end and an open lower end has a predetermined diameter of the lever body 47.
0 is fitted and fixed so as to be located between the both arm portions 42 of the lower case 43. Here, an upper bush 51 and a lower bush 52 are provided between the upper case 50 and the lower case 43.
Are arranged, and the lower case 43 attached to the arm 8 and the upper case 50 attached to the lever 48 are rotatable. One torsion bar 53 is disposed in the inner space of the lower case 43 and the inner space of the upper case 50, and the lower end 53 a of the torsion bar 53 is fitted to the lower case 43. At the same time, the upper end portion 53b is externally fitted to the upper case 50, thereby completely fixing each of them. Here, the tension adjusting mechanism 40 may include a swivel mechanism 26 as shown in FIG. The operation of the embodiment of the present invention will be described below. When tension is applied to the chain 22 of the string-like members as the pallet 3 moves, the chain 22
By pulling 8, a torsional force acts on the lower end of the torsion bar 53 via the upper case 50 to twist the upper end of the torsion bar 53 in the circumferential direction. Here, FIG. 6 shows a state in which an attachment load is applied to the tension adjustment mechanism 40, FIG. 7 shows a state in which no load is applied to the tension adjustment mechanism 40, and FIG. 8 shows a state in which a maximum load is applied to the tension adjustment mechanism 40. Each is shown. At this time, the torsion bar 53 buffers the tension generated on the pallet 3 and the chain 22 similarly to other elastic members, and when the torsion force acting on the torsion bar 53 suddenly comes off for some reason, the amplitude of the amplitude increases. The torsion elasticity of the small torsion bar 53 prevents the pallet 3 from suddenly moving forward. As described above, since the tension adjusting mechanism 40 is provided with the torsion bar 53 having a small amplitude due to torsional elasticity, when a force acting on the chain 22 is buffered, a large repulsive force such as expansion and contraction of the coil spring 28 is applied. Thus, irregular movement of the pallet 3 can be suppressed. It should be noted that the moving walkway of the present invention is not limited to the above-described embodiment, but may be any as long as it utilizes torsional elasticity in place of the torsion bar. It goes without saying that changes can be made without departing from the spirit of the invention. As described above, according to the moving walkway of the present invention, since the tension adjusting mechanism is provided with the torsion bar having a small amplitude due to the torsional elasticity, the force acting on the string-like member is buffered. At this time, various excellent effects can be achieved such that a large repulsive force such as expansion and contraction of a coil spring can be eliminated and irregular movement of the pallet can be suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing an embodiment of a moving walkway according to the present invention. FIG. 2 is a plan view showing a pallet used for a moving sidewalk according to the present invention. FIG. 3 is a side view showing a tension adjusting mechanism in FIG. 1; FIG. 4 is a vertical sectional side view showing a tension adjusting mechanism in FIG. 3; FIG. 5 is a view in the direction of arrows VV in FIG. 3; 6 is a plan view showing the state when an attachment load is applied to the tension adjusting mechanism, as viewed in the direction of arrows VI-VI in FIG. 3; FIG. 7 is a plan view showing a state when no load is applied to the tension adjusting mechanism, as viewed in the direction of arrows VI-VI in FIG. 3; 8 is a plan view showing the state when a maximum load is applied to the tension adjusting mechanism, as viewed in the direction of arrows VI-VI in FIG. 3; FIG. 9 is an overall plan view showing a rail and a screw rod on a moving sidewalk. FIG. 10 is a side view showing a part of a turning section and a transport section in a moving sidewalk. FIG. 11 is a plan view of FIG. FIG. 12 is a side view showing detailed details of a moving walkway. FIG. 13 is a plan view showing a pallet used for a moving sidewalk. FIG. 14 is a front view showing a pallet used for a moving sidewalk. FIG. 15 is a partial side view showing a fitted state of a pallet main body and another pallet main body. FIG. 16 is a partial side view showing a high speed range of the screw rod. FIG. 17 is a partial side view showing a low speed range of the screw rod. FIG. 18 is a partial side view showing a getting-on / off range of the screw rod. FIG. 19 is a side sectional view showing a tension adjusting mechanism and a swivel mechanism. FIG. 20 is a side view showing a state of the pallet in the turning section. FIG. 21 is a side view showing a state of a pallet in a turning section. [Description of Signs] 1A Conveyor 1B Conveyor 1C Revolving part 1D Revolving part 3 Pallet 11 Rail (moving path) 16 Screw rod 16a Screw groove 18 Moving roller (thrust transmitting member) 19 Screw rod 19a Screw groove 22 Chain (string) 24) Screw rod 24a Screw groove 40 Tension adjustment mechanism 53 Torsion bar

Claims (1)

Claims: 1. A substantially horizontal moving path having two arc-shaped turning parts and a transport part connecting the two turning parts, and a moving path arranged on the moving path so as to be tiltable forward. A plurality of pallets that can rotate in one direction, screw rods arranged and rotatable on the downstream side of the pallet moving direction of the transporting section of the moving path, and provided on each pallet and engaged with screw grooves of the screw rods. A moving sidewalk comprising a possible thrust transmitting member, a string-shaped member connecting front and rear pallets, and a tension adjusting mechanism for adjusting a tension applied to the string-shaped member by a torsion bar.