Auxiliary brake for passenger conveyor

Abstract

Provided is an auxiliary brake for a passenger conveyor that can be easily released. The auxiliary brake for a passenger conveyor is provided with a brake wheel that has a groove on one side and is arranged to rotate in synchronization with a main shaft of a sprocket of the passenger conveyor, the groove being recessed in the direction of the rotation axis and having a face parallel to the rotation axis at one end, and a lever that has a rod-like shape, is arranged to be freely movable in the direction of the rotation axis of the brake wheel, and is displaced between a first position in contact with any face of the groove and a second position not in contact with any face of the groove.

Description

Technical Field

[0001] This invention relates to an auxiliary brake for passenger conveyors. Background Technology

[0002] Patent Document 1 discloses an auxiliary brake for a passenger conveyor. This allows the steps to stop even if the main brake of the passenger conveyor malfunctions.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2013-163558 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, the auxiliary brake of the passenger conveyor described in Patent Document 1 requires an operator to confirm the action of the auxiliary brake before releasing it after braking. Therefore, the auxiliary brake cannot be easily released.

[0008] This invention was made to solve the aforementioned problems. The object of this invention is to provide an auxiliary brake for a passenger conveyor that can be easily released.

[0009] Methods for solving problems

[0010] The auxiliary brake of the passenger conveyor of the present invention comprises: a brake wheel having a groove on one side and configured to rotate synchronously with the main shaft of the sprocket of the passenger conveyor, the groove being recessed in the direction of the rotation axis and having a surface parallel to the rotation axis at one end; and a rod having a rod-like shape, configured to be movable freely in the direction of the rotation axis of the brake wheel and to shift between a first position in contact with any surface of the groove and a second position not in contact with any surface of the groove.

[0011] Invention Effects

[0012] According to the present invention, the auxiliary brake of the passenger conveyor includes a lever that is freely movable in the direction of the rotation axis of the brake wheel. Therefore, the auxiliary brake can be easily released. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the passenger conveyor in Implementation Method 1.

[0014] Figure 2 This is a diagram showing the auxiliary brake of the passenger conveyor according to Embodiment 1.

[0015] Figure 3 This is a diagram showing the auxiliary brake of the passenger conveyor according to Embodiment 1.

[0016] Figure 4 This is a diagram showing the brake wheel of the passenger conveyor in Embodiment 1. Detailed Implementation

[0017] The embodiments for carrying out the invention will be described with reference to the accompanying drawings. Furthermore, in the drawings, identical or equivalent parts are labeled with the same reference numerals. Repetitive descriptions of these parts are appropriately simplified or omitted.

[0018] Implementation method 1.

[0019] Figure 1 This is a structural diagram of the passenger conveyor in Implementation Method 1. Figure 1 (B) is Figure 1 The X-direction view of (A).

[0020] exist Figure 1 In the middle, passenger conveyor 1 is an escalator.

[0021] The passenger conveyor 1 has a first entrance / exit 2a, a second entrance / exit 2b, multiple steps 3, a main frame 4, a pair of step sprockets 5, a pair of step chains 6, a main shaft 7, a drive sprocket 8, a motor 9, a reducer 10, a drive chain 11, an auxiliary brake 20, and a control panel (not shown).

[0022] Passenger conveyor 1 is installed between the upper and lower floors of a building (not shown). Passenger conveyor 1 transports passengers between the upper and lower floors.

[0023] Entrance 2a is located on the upper floor of the building. Users access passenger conveyor 1 through entrance 2a. Entrance 2b is located on the lower floor of the building. Users access passenger conveyor 1 through entrance 2b.

[0024] Multiple steps 3 are connected in a ring. Multiple steps 3 are located between the first entrance / exit 2a and the second entrance / exit 2b.

[0025] The main frame 4 has an upper computer room 4a and a lower computer room 4b. The main frame 4 is located between the first entrance / exit 2a and the second entrance / exit 2b.

[0026] The upper computer room 4a is located at the upper end of the main frame 4. The upper computer room 4a is located below the first entrance / exit 2a. The lower computer room 4b is located at the lower end of the main frame 4. The lower computer room 4b is located below the second entrance / exit 2b.

[0027] For example, a pair of ladder sprockets 5 are respectively installed in the upper machine room 4a.

[0028] The pair of step chains 6 are both loop chains. For example, the pair of step chains 6 are both roller chains. One of the pair of step chains 6 connects one side of each of the multiple steps 3. The other of the pair of step chains 6 connects the other side of each of the multiple steps 3. The pair of step chains 6 are wound around the pair of step sprockets 5 in a manner that allows them to move in accordance with the rotation of each of the pair of step sprockets 5.

[0029] For example, the main shaft 7 is located in the upper machine room 4a. The main shaft 7 is connected to a pair of stepped sprockets 5 in a manner that enables synchronous rotation.

[0030] The drive sprocket 8 is connected to the main shaft 7 in a manner that enables synchronous rotation.

[0031] The motor 9 has a drive pulley 9a. For example, the motor 9 is installed in the upper machine room 4a. The motor 9 is a device that generates a driving force to rotate the drive pulley 9a.

[0032] The reducer 10 includes a driven pulley 10a, an output shaft 10b, and a main brake 10c. The reducer 10 is disposed adjacent to the motor 9. The reducer 10 is a device that transmits the rotation of the driven pulley 10a to the output shaft 10b.

[0033] For example, the driven pulley 10a is connected to the drive pulley 9a via an annular belt. The annular belt transmits the rotational driving force of the drive pulley 9a to the driven pulley 10a as a rotational driving force.

[0034] The main brake 10c brakes the rotation of the output shaft 10b.

[0035] The drive chain 11 is a loop chain. For example, the drive chain 11 is a roller chain. One side of the drive chain 11 is wound around the output shaft 10b in a manner that allows it to move in response to the rotation of the output shaft 10b. The other side of the drive chain 11 is wound around the drive sprocket 8 in a manner that allows it to transmit the rotational driving force of the output shaft 10b.

[0036] The auxiliary brake 20 includes a brake wheel 30 and a brake 40.

[0037] For example, the brake wheel 30 has a disc shape. The brake wheel 30 has multiple grooves 31 on one side. For example, the brake wheel 30 has four grooves 31. The brake wheel 30 is disposed on one side of one of a pair of stepped sprockets 5. The brake wheel 30 is positioned so that its other side faces one side of one of the pair of stepped sprockets 5. The brake wheel 30 is connected to the main shaft 7 in a manner that allows for synchronous rotation.

[0038] The plurality of grooves 31 have a shape that is recessed from one side surface of the brake wheel 30 in the direction of rotation axis of the brake wheel 30. Each of the plurality of grooves 31 has a stop portion 31a at one end. For example, the plurality of grooves 31 each have an arc shape with one end provided near the circumference of the brake wheel 30 and the other end provided near the center of the brake wheel 30 as the two ends.

[0039] For example, the stop part 31a has a stop surface that is parallel to the rotation axis of the brake wheel 30 between the bottom surface of the groove 31 and one side surface of the brake wheel 30.

[0040] The brake 40 includes a lever 41. For example, the brake 40 is located on one side of the brake wheel 30.

[0041] The brake 40 displaces the position of the lever 41. The brake 40 displaces the lever 41 to a first position near one side of the brake wheel 30. The brake 40 displaces the lever 41 to a second position further away from the brake wheel 30 than the first position.

[0042] For example, rod 41 has a rod-like shape. Rod 41 has protrusions 42.

[0043] The lever 41 is configured to move freely in the direction of the rotation axis of the brake wheel 30. The lever 41 is configured such that the protrusion 42 faces one side of the brake wheel 30. The lever 41 is configured such that, in the first position, the protrusion 42 can contact the surface of any one of the plurality of grooves 31. When the lever 41 is in the first position, the protrusion 42 is tightly fitted against one side surface of the brake wheel 30.

[0044] For example, the protrusion 42 has a cylindrical shape. When the rod 41 is in the first position, the protrusion 42 is in either a state of being in close contact with one side surface of the brake wheel 30, or a state of being in contact with the surface of any one of the plurality of grooves 31. When the rod 41 is in the second position, the protrusion 42 is not in contact with the brake wheel 30.

[0045] For example, a control panel (not shown) is located in the upper machine room 4a. The control panel controls the operation of the motor 9. For example, the control panel controls the operation of the main brake 10c. For example, the control panel controls the operation of the auxiliary brake 20.

[0046] For example, when multiple moving steps 3 need to be stopped during stable operation, the main brake 10c stops the multiple steps 3 by braking the rotation of the main shaft 7.

[0047] For example, in passenger conveyor 1, abnormal situations may occur such as drive chain 11 breaking, running speed or direction not following control panel control, and power outages preventing power supply. For example, in the event of an abnormal situation, auxiliary brake 20 stops multiple steps 3 by braking the rotation of main shaft 7. For example, in the event of an abnormal situation, auxiliary brake 20 stops multiple steps 3 by braking the rotation of main shaft 7 together with main brake 10c. In this case, to prevent sudden deceleration of multiple steps 3, auxiliary brake 20 initiates braking of main shaft 7 rotation only after a certain period of time has elapsed following the braking action of main brake 10c.

[0048] In the event of an abnormal condition, the auxiliary brake 20 is activated. With the auxiliary brake 20 activated, the brake 40 moves the lever 41 from the second position to the first position.

[0049] Then, for example, the protrusion 42 is in close contact with one side surface of the brake wheel 30. As the brake wheel 30 rotates, the position in which the protrusion 42 is in close contact with the brake wheel 30 changes. When the position in which the protrusion 42 is in close contact with the brake wheel 30 coincides with any one of the plurality of grooves 31, the protrusion 42 contacts any surface of that groove 31.

[0050] Then, by rotating the brake wheel 30, the protrusion 42 moves within the inner region of the groove 31. The protrusion 42 moves within the inner region of the groove 31 until it contacts the stop surface.

[0051] When the protrusion 42 contacts the stop surface, the stop surface of the brake wheel 30 is engaged with the protrusion 42, thereby braking the rotation of the brake wheel 30 by the brake 40. The brake wheel 30 brakes the rotation of the main shaft 7.

[0052] After a certain adjustment time has elapsed since the auxiliary brake 20 was activated, the rotation of the main shaft 7 is braked. The length of this adjustment time varies depending on the shape of the multiple slots 31.

[0053] Then, the brake 40 changes the lever 41 from the first position to the second position, thereby releasing the brakes of the auxiliary brake 20.

[0054] Next, use Figure 2 and Figure 3 The structure of the auxiliary brake 20 will be described.

[0055] Figure 2 This is a diagram showing the auxiliary brake of the passenger conveyor according to Embodiment 1. Figure 3 This is a diagram showing the brake of the passenger conveyor according to Embodiment 1. Figure 2 (B) is Figure 2The Y-direction view of (A).

[0056] like Figure 2 and Figure 3 As shown, the brake 40 includes a rod 41, a protrusion 42, a displacement component 43, and an electromagnet 50.

[0057] For example, the shifting component 43 includes a first support component 44a, a second support component 44b, a rod rotation shaft 45, and a plurality of helical springs 46. The shifting component 43 is connected to the rod 41.

[0058] The shifting component 43 applies an external force to the rod 41 in the direction of moving to the first position.

[0059] For example, the first support member 44a has a plate-like shape. For example, the first support member 44a has a circular hole in the center. The first support member 44a is disposed above the brake wheel 30. The central axis of the circular hole in the first support member 44a is arranged to be parallel to the rotation axis of the brake wheel 30. One side of the first support member 44a and one side of the brake wheel 30 exist on the same plane.

[0060] For example, the second support member 44b has a plate-like shape. For example, the second support member 44b has a circular hole in the center. The second support member 44b is disposed on one side of the first support member 44a. The central axis of the circular hole in the second support member 44b is coaxial with the hole in the first support member 44a.

[0061] For example, the rod rotation axis 45 has a cylindrical shape. The rod rotation axis 45 is connected to the rod 41. For example, the rod rotation axis 45 is configured such that its length direction is perpendicular to the length direction of the rod 41.

[0062] The rod rotation shaft 45 is inserted into the holes of the first support member 44a and the second support member 44b. The rod rotation shaft 45 is supported by the first support member 44a and the second support member 44b to allow for free rotation.

[0063] Multiple helical springs 46 are elastic. For example, multiple helical springs 46 are disposed between rod 41 and second support member 44b. For example, one end of multiple helical springs 46 is connected to rod 41. For example, the other end of multiple helical springs 46 is opposite to second support member 44b. For example, multiple helical springs 46 apply an external force to rod 41 in the direction of movement toward first position using elastic force.

[0064] The electromagnet 50 has a movable shaft 50a. For example, the electromagnet 50 is located on the other side of the second support member 44b. The electromagnet 50 is connected to a power source (not shown).

[0065] The electromagnet 50 uses electromagnetic force to apply an external force to the movable shaft 50a. For example, when current flows through it, the electromagnet 50 applies an external force in one direction to the movable shaft 50a. When no current flows through it, the electromagnet 50 does not apply an external force to the movable shaft 50a.

[0066] For example, the movable shaft 50a has a cylindrical shape. The movable shaft 50a is connected to the rod rotation shaft 45. For example, the movable shaft 50a is configured such that its central axis is coaxial with the rotation axis of the rod rotation shaft 45.

[0067] The brake 40 uses a shifting component 43 and an electromagnet 50 to shift the position of the rod 41.

[0068] The shifting component 43 always applies an external force to the rod 41 in the direction of moving to the first position.

[0069] When current flows through electromagnet 50, electromagnet 50 applies an external force to rod 41 via rod rotation axis 45 in the direction of displacement to the second position. Rod 41 is held in the second position by electromagnet 50. The second position is the position where the external force on rod 41 from displacement member 43 is balanced with the external force from electromagnet 50.

[0070] When no current flows through the electromagnet 50, the electromagnet 50 does not apply any external force to the rod 41. The rod 41 is held in the first position by the displacement member 43. For example, the first position is the position where the rod 41 contacts the first support member 44a.

[0071] Next, use Figure 4 The inclination of the multiple slots 31 is explained.

[0072] Figure 4 This is a diagram showing the brake wheel of the passenger conveyor in Embodiment 1. Figure 4 The ZZ section of the brake wheel 30 is shown in the figure.

[0073] exist Figure 4 In the diagram, the upward direction is a clockwise rotation centered on the main axis 7. The downward direction is a counter-clockwise rotation centered on the main axis 7.

[0074] like Figure 4 As shown, each of the multiple slots 31 has an inclined surface 32.

[0075] An inclined surface 32 is disposed between the bottom surface of each of the plurality of grooves 31 and one side surface of the brake wheel 30. For example, the inclined surface 32 smoothly connects the bottom surface of each of the plurality of grooves 31 to one side surface of the brake wheel 30. For example, the inclined surface 32 is disposed at the other end of each of the plurality of grooves 31.

[0076] When the brake wheel 30 is rotating in the upward direction, Figure 4When the protrusion 42 (not shown) comes into contact with the surface of any of the multiple grooves 31, the position of the protrusion 42 moves from the bottom surface of that groove 31 to the inclined surface 32. Then, the position of the protrusion 42 moves from the inclined surface 32 to one side surface of the brake wheel 30. The auxiliary brake 20 does not brake the rotation of the main shaft 7.

[0077] When the brake wheel 30 is rotating in the downward direction, Figure 4 When the protrusion 42 (not shown) comes into contact with the surface of any one of the multiple slots 31, the protrusion 42 stops at the stop portion 31a of that slot 31. The protrusion 42 stops at the stop portion 31a. The auxiliary brake 20 brakes the rotation of the main shaft 7.

[0078] According to Embodiment 1 described above, the auxiliary brake 20 includes a brake wheel 30 and a rod 41. The brake wheel 30 has a plurality of grooves 31 recessed in the direction of the rotation axis on one side. Each of the grooves 31 has a surface parallel to the rotation axis at one end. The brake wheel 30 is disposed to the side of one of a pair of step sprockets 5 of the passenger conveyor 1. The brake wheel 30 is configured to rotate synchronously with the main shaft 7. The rod 41 has a rod-like shape. The rod 41 has a protrusion 42 opposite to one side of the brake wheel 30. The rod 41 is configured to be freely movable in the direction of the rotation axis of the brake wheel 30. The rod 41 is configured to shift between a first position and a second position. In the first position, the rod 41 contacts the surface of any one of the grooves 31 via the protrusion 42. In the second position, the rod 41 does not contact the surface of any of the grooves 31 via the protrusion 42. Therefore, the auxiliary brake 20 can be released by moving the lever 41 from the first position to the second position. The auxiliary brake 20 can be released regardless of the rotational state of the brake wheel 30. As a result, the auxiliary brake 20 can be easily released.

[0079] Furthermore, the brake wheel 30 has a plurality of grooves 31 in a continuous shape extending from the circumferential side to the center side of the brake wheel 30. Therefore, for example, the protrusion 42 always contacts each groove 31 first at its respective other end. The time from the protrusion 42 contacting the surface of any one of the grooves 31 until the protrusion 42 stops at the stop portion 31a can always be the same length. As a result, by changing the shape of the plurality of grooves 31, the time from the activation of the auxiliary brake 20 until braking the rotation of the main shaft 7 can be changed.

[0080] Furthermore, the auxiliary brake 20 includes a shifting member 43 and an electromagnet 50. The shifting member 43 applies an external force to the lever 41 in the direction of shifting to a first position. An external force is applied to the lever 41 in the direction of shifting to a second position by allowing current to flow through the electromagnet 50. Therefore, depending on whether the electromagnet 50 is energized, the auxiliary brake 20 can be switched between braking and brake release. As a result, the auxiliary brake 20 can be used in the event of a power outage. Furthermore, the auxiliary brake 20 can be automatically released without the need for an operator.

[0081] Furthermore, the brake wheel 30 has an inclined surface 32 disposed between the bottom surface of each of the plurality of grooves 31 and one side surface of the brake wheel 30. Therefore, when the brake wheel 30 rotates in the upward direction, the auxiliary brake 20 does not brake the main shaft 7. As a result, the braking action can be limited to only one direction.

[0082] Alternatively, if braking is achieved by shifting the lever 41 along the rotation axis of the brake wheel 30, it may not need to be located on one side of the brake wheel 30. For example, the lever 41 can be located on the other side of the brake wheel 30. In this case, multiple slots 31 are provided on the other side of the brake wheel 30. The shifting member 43 applies an external force to the lever 41 in one direction. The electromagnet 50 applies an external force to the lever 41 in another direction.

[0083] Furthermore, the rotation direction of the brake wheel 30, which is capable of braking the main shaft 7 by the auxiliary brake 20, is not limited to the downward direction. The rotation direction in which the auxiliary brake 20 brakes the main shaft 7 can be changed by altering the shape of the plurality of grooves 31. For example, each of the plurality of grooves 31 has a stop portion 31a at one end and the other end. In this case, the auxiliary brake 20 brakes the main shaft 7 regardless of the rotation direction of the brake wheel 30.

[0084] Industrial availability

[0085] As described above, the auxiliary brake of the passenger conveyor of the present invention can be used in a passenger conveyor.

[0086] Label Explanation

[0087] 1: Passenger conveyor; 2a: First entrance / exit; 2b: Second entrance / exit; 3: Step; 4: Main frame; 4a: Upper machine room; 4b: Lower machine room; 5: Step sprocket; 6: Step chain; 7: Main shaft; 8: Drive sprocket; 9: Motor; 9a: Drive pulley; 10: Reducer; 10a: Driven pulley; 10b: Output shaft; 10c: Main brake; 11: Drive chain; 20: Auxiliary brake; 30: Brake wheel; 31: Groove; 31a: Stop part; 32: Inclined surface; 40: Brake; 41: Rod; 42: Protrusion; 43: Displacement component; 44a: First support component; 44b: Second support component; 45: Rod rotation shaft; 46: Helical spring; 50: Electromagnet; 50a: Movable shaft.

Claims

1. An auxiliary brake of a passenger conveyor, comprising: a brake wheel provided with a groove on one side and configured to rotate in synchronization with a main shaft of a chain wheel of the passenger conveyor, the groove being recessed in a direction of an axis of rotation and having a face parallel to the axis of rotation at one end; a rod having a bar shape and configured to be movable in the direction of the axis of rotation of the brake wheel and to be displaced between a first position in contact with any face of the groove and a second position not in contact with any face of the groove; a pair of support members having circular holes with a center axis parallel to the axis of rotation of the brake wheel; and a rod rotation shaft having a cylindrical shape, inserted into the holes of the pair of support members, and supported so as to be rotatable, wherein the groove has a circular arc shape with one end provided near a circumference of the brake wheel and the other end provided near a center of the brake wheel as both end portions, wherein one end in a length direction of the rod has a protruding body configured to be opposed to one side of the brake wheel and in contact with any face of the groove at the first position, wherein the other end in the length direction of the rod is connected to the rod rotation shaft in a manner that a length direction thereof is perpendicular to a length direction of the rod rotation shaft, and wherein the brake wheel is provided with an inclined face provided between a bottom face of the groove and one side of the brake wheel.

2. The auxiliary brake of the passenger conveyor according to claim 1, wherein the brake wheel is provided with the groove having a shape continuous from a circumferential side to a central side.

3. The auxiliary brake of the passenger conveyor according to claim 1 or 2, comprising: a displacement member configured to apply an external force in a direction to displace the rod to the first position to the rod; and an electromagnet configured to apply an external force in a direction to displace the rod to the second position to the rod by causing a current to flow in the electromagnet. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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