Passenger conveyor

Abstract

To provide a passenger conveyor capable of reducing unnecessary operation of an inlet safety device.SOLUTION: The inlet safety device includes an operating body loosely fitted to the handrail such that a distal end side of the operating body protrudes outward from the inlet, a movable body 62 supporting the operating body, a base 64 supporting the movable body 62 so as to be movable in a moving direction of the handrail, a safety switch 65 operated by being contacted and pressed by a contact portion 62d of the movable body 62 when the operating body is pushed into the inlet portion and the movable body 62 moves in the moving direction of the handrail, and a resilient force applying portion 70 applying a resilient force to the movable body 62 in a direction opposite to the moving direction of the movable body 62, wherein the resilient force applying portion 70 includes a first resilient body 71A and a second resilient body 71B arranged in series.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a passenger conveyor equipped with an inlet safety device in an inlet section having an inlet which is the entrance to the return section of a handrail. [Background technology]

[0002] Passenger conveyors such as escalators and moving walkways are equipped with handrails. The handrails change direction at the exit side and move toward the inlet section of the handrail. The inlet section is equipped with an inlet safety device to prevent entrapment and pinching. The inlet safety device includes an actuator and a safety switch. The actuator is loosely fitted into the handrail so that its tip protrudes outward from the inlet of the inlet section. When the inlet safety device comes into contact with a passenger's body or belongings and is pushed into the inlet section, the safety switch is activated, and a safety process is executed, such as emitting a warning sound from a speaker installed near the inlet section or automatically stopping the escalator (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-175588 Summary of the Invention [Problem to be solved by the invention]

[0004] This type of inlet safety device is designed to activate when the actuator is pushed in a few millimeters, so there are cases where the inlet safety device is instantly activated even when it is not needed, such as when a child plays with the device or when the device is only momentarily touched.

[0005] The present invention has been made in view of the above circumstances, and has as its object to provide a passenger conveyor that can reduce unnecessary operation of the inlet safety device. [Means for solving the problem]

[0006] The passenger conveyor according to the present invention comprises: As an inlet safety device provided in an inlet section having an inlet which is the entrance to the return section of a handrail, an actuator loosely fitted to the handrail so that its tip end protrudes outward from the inlet; a safety switch that is activated by contact and pressure when an actuator is pushed into the inlet and moves in the direction of movement of the handrail; an elastic force applying unit that applies an elastic force to the operating body directly or indirectly in a direction opposite to the moving direction of the operating body, The elastic force applying portion includes a first elastic body and a second elastic body arranged in series. It is a passenger conveyor.

[0007] As one aspect of the passenger conveyor according to the present invention, As an inlet safety device, a movable body supporting the actuator; a base that supports the movable body so that the movable body can move in the moving direction of the handrail, The safety switch is activated when the actuator is pushed into the inlet and the movable body moves in the direction of movement of the handrail, and is contacted and pressed by the contact part of the movable body. The elastic force applying portion applies an elastic force to the movable body in a direction opposite to the direction of movement of the movable body. The above configuration can be adopted.

[0008] As one aspect of the passenger conveyor according to the present invention, the movable body and the base each have a mounting portion, and the two mounting portions face each other with a predetermined gap between them; The elastic force applying portion further includes: an intermediate body disposed between the two mounting portions so as to be movable in the moving direction of the movable body; a locking body that comes into contact with the intermediate body moving in the moving direction of the movable body and locks the intermediate body, thereby restricting further movement of the intermediate body; the first elastic body is disposed between the mounting portion of the movable body and the intermediate body, and the second elastic body is disposed between the intermediate body and the mounting portion of the base; The locking body is provided so as to abut against the intermediate body before the contact portion of the movable body comes into contact with the safety switch or at the same time as the contact portion of the movable body comes into contact with the safety switch. The above configuration can be adopted.

[0009] As one aspect of the passenger conveyor according to the present invention, When the elastic constant of the first elastic body is k1, the elastic constant of the second elastic body is k2, the distance between the contact part of the movable body and the safety switch in the moving direction of the movable body is L1, and the distance between the intermediate body and the locking body in the moving direction of the movable body is L2, the following conditional formula is satisfied. L1 ≥ [(k1 + k2) / k1]L2 The above configuration can be adopted.

[0010] As one aspect of the passenger conveyor according to the present invention, When the elastic constant of the first elastic body is k1 and the elastic constant of the second elastic body is k2, the following conditional expression is satisfied: k1>k2 The above configuration can be adopted. [Effects of the Invention]

[0011] In order to reduce unnecessary actuation of the inlet safety device, there are generally two approaches: i) employing an elastic body with a larger elastic constant; or ii) employing an elastic body with a smaller elastic constant and a longer length as the elastic body provided in the elastic force applying portion. However, in the case of i), there is a problem that the adjustment range of the elastic force is narrowed, making it difficult to adjust the elastic force. In the case of ii), there is a problem that the linearity of the elastic body is reduced, causing a deviation in the elastic force vector, again making it difficult to adjust the elastic force. In contrast, according to the present invention, the elastic body is composed of two elastic bodies, a first elastic body and a second elastic body, arranged in series. Therefore, according to the present invention, it is possible to simultaneously solve both the problems of the cases i) and ii), while reducing unnecessary actuation of the inlet safety device. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of the exterior of an escalator. [Figure 2] FIG. 2 is a front view of the inlet portion. [Figure 3] Figure 3(a) is a front view of the inlet safety device, and Figure 3(b) is a front view of the inlet safety device with the actuator removed. [Figure 4] Figure 4(a) is a plan view of the inlet safety device, and Figure 4(b) is a side view of the inlet safety device. [Figure 5] Figure 5(a) is a partially enlarged plan view of the inlet safety device, and Figure 5(b) is a partially enlarged side view of the inlet safety device. [Figure 6] 6(a) and (b) are explanatory diagrams relating to the operation of the inlet safety device. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an escalator equipped with an inlet safety device will be described as an embodiment of the present invention.

[0014] As shown in FIG. 1, escalator 1 comprises a truss (not shown), a boarding / alighting entrance 3, a conveying section 4, and a handrail section 5. The truss is a structure that supports the weight of escalator 1 and its load. The boarding / alighting entrance 3 is provided at the top of both ends of the truss and is located at the end (starting end, terminal end) of the aisle. The conveying section 4 is supported by the truss, and its tread moves along the aisle, transporting passengers while keeping them standing in that position without making them walk. The handrail sections 5 are also supported by the truss and are provided along the aisle on both sides.

[0015] The boarding / alighting entrance 3 (boarding entrance 3A and disembarking entrance 3B) is provided at the top of the horizontal end of the truss. The boarding / alighting entrance 3 is equipped with a floor plate 30. The floor plate 30 forms the floor of the boarding / alighting entrance 3 and is installed at the end (starting end, ending end) of the passage. The tip of the floor plate 30 marks the boundary between the boarding / alighting entrance 3 and the conveying section 4.

[0016] The conveying section 4 includes an endless conveying body 40. The endless conveying body 40 is formed by connecting a plurality of steps 41, etc. in an endless manner. The endless conveying body 40 is arranged within the truss so as to be able to move in a circular manner along the longitudinal direction of the truss. The endless conveying body 40 moves in a circular manner in one direction or the other by being driven by a drive motor (not shown).

[0017] The handrail section 5 comprises a handrail 50 and a balustrade 51. The handrail 50 is also called a moving handrail and is flexible and endless. The handrail 50 moves in a circular manner in conjunction with the endless transport body 40. The balustrade 51 is arranged on the side of the endless transport body 40 along the longitudinal direction of the endless transport body 40. The lower side of the balustrade 51 is supported by a truss, and supports the handrail 50 so that it can move in a circular manner. A pair of handrails 50 and balustrades 51 is provided along the passage on both sides of the passage.

[0018] The balustrade 51 comprises a balustrade panel 52, a skirt guard 54, an exterior material 55, a deck cover 56, and an inlet guard 57. The balustrade panel 52 has its lower edge supported by a truss and is disposed vertically between the outbound portion, which is the upper edge of the handrail 50, and the inbound portion, which is the lower edge. The skirt guard 54 is disposed inside the balustrade panel 52. The exterior material 55 is disposed outside the balustrade panel 52. The deck cover 56 is disposed so as to close the upper opening between the skirt guard 54 and the exterior material 55. The inlet guard 57 is disposed so as to cover both longitudinal ends (portions where the inbound portion of the handrail 50 enters and exits). In this way, the balustrade 51 has an internal space surrounded by the skirt guard 54, the exterior material 55, the deck cover 56, and the inlet guard 57, and shields the inbound portion of the handrail 50 from the outside.

[0019] As shown in FIG. 2, the inlet guard 57 is composed of a cover 58 that can be separated into left and right halves from the center. The cover 58 includes an inner cover 58A and an outer cover 58B. The inner cover 58A is curved or bent at its middle, with one end abutting against one end of the outer cover 58B and the other end abutting against the end of the skirt guard 54. The outer cover 58B is curved or bent at its middle, with one end abutting against one end of the inner cover 58A and the other end abutting against the end of the exterior material 55. The front portion of the cover 58 serves as the inlet portion 59. The cover 58 is also referred to as a newel cover, and the area where the cover 58 is disposed is also referred to as a newel portion. As an example, the cover 58 is a resin molded product.

[0020] The inner cover 58A and the outer cover 58B each have a notch 58a that opens at the butted ends. When the inner cover 58A and the outer cover 58B are combined, the two notches 58a, 58a combine to form a single horizontally elongated hole, which serves as an inlet (entrance / exit) 59a for the handrail 50 in the inlet section 59. In other words, the inlet 59a is formed across the division line of the cover 58, which can be divided into left and right halves. As an example, the notch 58a is rectangular, and the inlet 59a is horizontally elongated rectangular.

[0021] 3 and 4, the inlet portion 59 is provided with an inlet safety device 60 for the purpose of preventing entanglement or pinching. The inlet safety device 60 includes an actuator 61, a movable body 62, a base 64, and a safety switch 65.

[0022] The actuator 61 has a handrail insertion hole 61a that is partially open, and is loosely fitted into the handrail 50, with its tip end protruding from the inlet 59a. The actuator 61 is a member made of a material such as rubber or hard resin that is capable of deforming to a certain extent, and is also called inlet rubber.

[0023] Actuating body 61 includes a flange portion 61b. Flange portion 61b protrudes outward from the base end portion of actuating body 61, is larger than the outer shape of inlet 59a, and has an outer shape that can abut against the inner surface of cover 58. When flange portion 61b abuts against the inner surface of cover 58, the amount of protrusion of the tip side of actuating body 61 is set to specified value P, and further protrusion of the tip side of actuating body 61 is restricted.

[0024] The movable body 62 is attached to the base 64 so as to be movable in the movement direction X (meaning one direction, not two directions; the same applies hereinafter) of the handrail 50. The movable body 62 is supported on the base 64 so as to be slidable in a straight line while being guided in the movement direction X of the handrail 50 by a guide portion.

[0025] The movable body 62 has an attachment portion 62a. The attachment portion 62a is plate-shaped and arranged along a direction perpendicular to the movement direction X of the movable body 62 (meaning one direction, not two directions; the same applies hereinafter). The attachment portion 62a is a portion to which the actuating body 61 (the flange portion 61b thereof) is attached. The attachment surface of the attachment portion 62a has screw holes 62b at appropriate locations. The screw holes 62b are holes for screws 63 used to fix the actuating body 61 to the attachment portion 62a. The attachment portion 62a has a handrail insertion hole 62c that is partially open so that the handrail 50 can be inserted therethrough. As an example, the main body and attachment portion 62a of the movable body 62 are formed by bending a metal plate material.

[0026] The movable body 62 has a contact portion 62d. The contact portion 62d faces an actuator 65a of the safety switch 65 in the movement direction X of the movable body 62. When the movable body 62 moves in the movement direction X of the handrail 50, the contact portion 62d comes into contact with and presses the actuator 65a, thereby activating the safety switch 65.

[0027] The base 64 includes a fixed portion 64a and an attachment portion 64b. The base 64 is attached and fixed to a frame 20 that is part of a truss (not shown) or to a frame 20 that is attached to a truss via the fixed portion 64a. The attachment portion 64b is plate-shaped and disposed along a direction perpendicular to the movement direction X of the movable body 62. The attachment portion 64b faces the attachment portion 62a of the movable body 62 in a parallel state with a predetermined gap therebetween. As an example, the main body portion, fixed portion 64a, and attachment portion 64b of the base 64 are formed by bending a metal plate material.

[0028] The safety switch 65 is attached to the base 64. The safety switch 65 is also called an inlet switch, and is a component of the safety circuit in the escalator 1. The safety switch 65 can employ various known actuator types, such as lever types such as roller lever types and rod lever types, and plunger types such as roller plunger types and push plunger types. As an example, the safety switch 65 is a limit switch equipped with a roller plunger type actuator 65a.

[0029] 5, the inlet safety device 60 includes an elastic force applying unit 70. The elastic force applying unit 70 is a mechanical unit that applies (biases) an elastic force to the movable body 62 in a direction opposite to the moving direction X of the movable body 62, thereby causing the protrusion amount on the tip side of the actuating body 61 to become a specified value P. The elastic force applying unit 70 includes a compression spring 71 as an elastic body, an intermediate body 72, and a locking body 73.

[0030] The compression spring 71 is disposed between the mounting portion 62a of the movable body 62 and the mounting portion 64b of the base 64. The compression spring 71 is composed of two springs, a first compression spring 71A and a second compression spring 71B. The first compression spring 71A and the second compression spring 71B are disposed in series so that their center lines are coaxial and parallel to the movement direction X of the movable body 62, i.e., perpendicular to the two opposing surfaces of the mounting portion 62a of the movable body 62 and the mounting portion 64b of the base 64. As an example, the first compression spring 71A and the second compression spring 71B are coil springs.

[0031] The first compression spring 71A is disposed between the mounting portion 62a of the movable body 62 and the intermediate body 72. One end of the first compression spring 71A abuts against the inner surface of the mounting portion 62a of the movable body 62. The other end of the first compression spring 71A abuts against one outer surface of the intermediate body 72.

[0032] The second compression spring 71B is disposed between the intermediate body 72 and the mounting portion 64b of the base 64. One end of the second compression spring 71B abuts against the other outer surface of the intermediate body 72. The other end of the second compression spring 71B abuts against the inner surface of the mounting portion 64b of the base 64.

[0033] If the spring constant (elastic constant) of the first compression spring 71A is k1 [N / mm] and the spring constant (elastic constant) of the second compression spring 71B is k2 [N / mm], then: k1>k2 (1) is. or, k1=k2 (2) may be. or, k1 <k2 (3) may be.

[0034] To maintain the first compression spring 71A and the second compression spring 71B in series, a core body 74 is inserted through the mounting portion 62a of the movable body 62, the first compression spring 71A, the intermediate body 72, the second compression spring 71B, and the mounting portion 64b of the base 64. As an example, the core body 74 is a fastener that combines a headed bolt such as a flat head bolt and a double nut. Insertion holes are formed in the mounting portion 62a of the movable body 62, the intermediate body 72, and the mounting portion 64b of the base 64. By rotating the nut to change the position where it is threaded onto the bolt, the elastic force of the first compression spring 71A and the second compression spring 71B can be adjusted.

[0035] The intermediate body 72 is plate-shaped and disposed along a direction perpendicular to the movement direction X of the movable body 62. As an example, the intermediate body 72 is a metal plate. The intermediate body 72 includes a pair of guide bodies 75, 75 at positions sandwiching the compression spring 71. The guide body 75 is attached to the other outer surface of the intermediate body 72 so as to be parallel to the movement direction X of the movable body 62, i.e., so as to be perpendicular to the other outer surface of the intermediate body 72. An insertion hole is formed in the mounting portion 64b of the base 64, and the guide body 75 is slidably inserted into the insertion hole. This allows the intermediate body 72 to move in the movement direction X of the movable body 62 without rotating around the movement direction X of the movable body 62 and while maintaining a parallel state with the mounting portion 62a of the movable body 62 and the mounting portion 64b of the base 64.

[0036] The locking body 73 is a stopper that faces the intermediate body 72 in the movement direction X of the movable body 62 (which is also the movement direction X of the intermediate body 72, the same applies below), abuts against the moving intermediate body 72, and locks the intermediate body 72. When the intermediate body 72 abuts against the locking body 73, further movement of the intermediate body 72 is restricted. The locking body 73 is attached to the inner surface of the mounting portion 64b of the base 64 so as to be parallel to the movement direction X of the movable body 62, i.e., so as to be perpendicular to the inner surface of the mounting portion 64b of the base 64. As an example, the locking body 73 is a fixing device that combines a headed bolt, a nut joined to the outer surface of the mounting portion 64b of the base 64 by welding or the like, and another nut. An insertion hole is formed in the mounting portion 64b of the base 64.

[0037] A pair of locking bodies 73 are provided at positions sandwiching the compression spring 71. In this case, each locking body 73 abuts against each end of the intermediate body 72 and locks each end of the intermediate body 72. However, only one of the locking bodies 73 may be provided.

[0038] The locking body 73 is provided so that its position in the movement direction X of the movable body 62 can be changed. As an example, the locking body 73 is provided so that its position in the movement direction X of the movable body 62 can be changed by rotating a headed bolt to change the position at which it is threaded with a nut. This makes it possible to change the distance (spacing) L2 [mm] between (the other outer surface of) the intermediate body 72 and (the tip surface of) the locking body 73 in the movement direction X of the movable body 62 in the initial state in which the movable body 62 is not moving in the movement direction X of the movable body 62.

[0039] L2 is set so that the relationship between the distance (spacing) L1 [mm] between (the contact surface of) the contact portion 62d of the movable body 62 in the movement direction X of the movable body 62 and (the contact point of) the actuator 65a of the safety switch 65 in the movement direction X of the movable body 62 in the initial state when the movable body 62 is not moving in the movement direction X of the movable body 62 satisfies the following conditional expression (4). L1≧[(k1+k2) / k1]L2 (4)

[0040] This is a conditional equation for realizing a two-stage operation in the safety process in which i) the operating body 61 comes into contact with the passenger's body or belongings and is pushed into the inlet 59, and an external force greater than the elastic force of the compression spring 71 is applied to the movable body 62, ii) the movable body 62 and the intermediate body 72 move against the elastic force, and iii) the safety switch 65 is activated, emitting a warning sound from a speaker (not shown) provided near the inlet 59 and automatically stopping the escalator 1, a) as shown in Figure 6(a), after the intermediate body 72 abuts against the locking body 73 and is locked by the locking body 73, or at the same time as the intermediate body 72 abuts against the locking body 73 and is locked by the locking body 73, b) as shown in Figure 6(b), the contact portion 62d of the movable body 62 comes into contact with and presses the actuator 65a of the safety switch 65, thereby activating the safety switch 65.

[0041] That is, if the external force required for the intermediate body 72 to come into contact with the locking body 73 from the initial state is F' [N], the amount of movement (displacement) of the movable body 62 from its initial position in the movement direction X of the movable body 62 is x1 [mm], and the amount of movement (displacement) of the intermediate body 72 from its initial position in the movement direction X of the movable body 62 is x2 [mm], then: x1=F' / k1+F' / k2=[(k1+k2) / k1k2]F' (5) x2=F' / k2 (6) is. Furthermore, from the above conditions a) and b), When x2=L2, x1≦L1 (7) is. Therefore, based on the expressions (5) to (7), the conditional expression (4) is derived.

[0042] Let F [N] be the external force required from the initial state until the contact portion 62d of the movable body 62 contacts the actuator 65a of the safety switch 65, Fα [N] be the external force required from the time when the intermediate body 72 contacts the locking body 73 until the contact portion 62d of the movable body 62 contacts the actuator 65a of the safety switch 65, L1' [mm] be the amount of movement of the contact portion 62d of the movable body 62 at the time when the intermediate body 72 contacts the locking body 73, and α [mm] be the gap between the contact portion 62d of the movable body 62 and the actuator 65a of the safety switch 65 in the movement direction X of the movable body 62 at the time when the intermediate body 72 contacts the locking body 73. L1=L1'+α (8) F=F'+Fα (9) Fα=k1α (10) and Furthermore, from equations (5) and (6), L1'=[(k1+k2) / k1k2]F' (11) L2=F' / k2 (12) is. where k2=Nk1 (13) Then, the following equations (14) to (16) are derived from equations (9) to (13). L1'=(N+1)L2 (14) k1=[1 / (NL2+α)]F (15) k2=[N / (NL2+α)]F (16) In actual design, the consideration is how many times larger L1' should be than L2. For example, if you want to make L1' 1.5 times larger than L2, then N = 0.5 and k2 = 0.5k1. Also, if the specified value P of the protrusion amount on the tip side of the actuator 61 is, for example, 25 mm, then L1 needs to be less than 25 mm. And suppose you want to operate the safety switch 65 when the external force is within the range of 29N to 78N. Under these conditions, For example, if the external force is 29N, L1'=7.5mm, L1=8.5mm (gap 1.0mm), L2=5.0mm, k1=8.29N / mm, k2=4.14N / mm is. For example, if the external force is 78N, L1'=7.5mm, L1=8.5mm (gap 1.0mm), L2=5.0mm, k1=22.29N / mm, k2=11.14N / mm is.

[0043] As described above, the inlet safety device 60 according to this embodiment can reduce unnecessary actuation of the inlet safety device 60. To be more specific, there are generally two approaches to reducing unnecessary actuation of the inlet safety device: i) using a compression spring with a larger spring constant; or ii) using a compression spring with a smaller spring constant and a longer length. However, option i) presents a problem in that the adjustment range of the elastic force is narrowed, making it difficult to adjust the elastic force. In option ii), the linearity of the compression spring is reduced, causing a deviation in the vector of the elastic force, again making it difficult to adjust the elastic force. In contrast, according to the inlet safety device 60 according to this embodiment, the compression spring 71 is composed of two compression springs, a first compression spring 71A and a second compression spring 71B, which are arranged in series. Therefore, the inlet safety device 60 according to this embodiment can simultaneously solve both the problems of option i) and option ii) while reducing unnecessary actuation of the inlet safety device 60.

[0044] According to the inlet safety device 60 of this embodiment, the intermediate body 72 comes into contact with the locking body 73 before the contact portion 62d of the movable body 62 comes into contact with (the actuator 65a of) the safety switch 65. As a result, when the spring constant k1 of the first compression spring 71A is greater than the spring constant k2 of the second compression spring 71B, the operating body 61 moves with a light force until the intermediate body 72 comes into contact with the locking body 73, and then moves with a heavy force after the intermediate body 72 comes into contact with the locking body 73. Therefore, by employing a first compression spring 71A having a spring constant k1 that is approximately the same as the spring constant of a spring in a conventional inlet safety device, the elastic force can be adjusted with a feel similar to that of the conventional method.

[0045] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention.

[0046] In the above embodiment, a compression coil spring is used as the elastic body. However, the present invention is not limited to this. The elastic body may be any other type of spring, such as a leaf spring, or any other elastic body, such as rubber.

[0047] In the above embodiment, the actuating body 61, the movable body 62, and the intermediate body 72 move in exactly the same direction as the movement direction X of the handrail 50. However, the movement direction of the handrail 50 also includes the movement directions of the actuating body 61, the movable body 62, and the intermediate body 72 being inclined within a predetermined angle range with respect to the movement direction X of the handrail 50.

[0048] In the above embodiment, the guide body 75 is provided integrally with the intermediate body 72 as a means for allowing the intermediate body 72 to move parallel to the moving direction without rotating around the moving direction. However, the present invention is not limited to this. The guide body 75 may be provided integrally with the mounting portion 62a of the movable body 62 or the mounting portion 64b of the base 64, and an insertion hole for inserting the guide body 75 may be formed in the intermediate body 72.

[0049] In the above embodiment, the passenger conveyor is an escalator. However, it goes without saying that the present invention can also be applied to a moving walkway. Note that there are moving walkways that have either a step-type endless conveyor or a belt-type endless conveyor (endless belt-like conveyor). [Explanation of symbols]

[0050] 1...escalator, 20...frame, 3...boarding / exiting door, 3A...boarding door, 3B...exiting door, 30...floor plate, 4...conveying part, 40...endless conveying body, 41...step, 5...handrail part, 50...handrail, 51...balustrade, 52...balustrade panel, 53...handrail guide, 54...skirt guard, 55...exterior material, 56...deck cover, 57...inlet guard, 58...cover, 58a...notch, 58A...inner cover, 58B...outer cover, 59...inlet part, 59a...inlet, 60...inlet Safety device, 61...actuating body, 61a...handrail insertion hole, 61b...flange portion, 62...movable body, 62a...mounting portion, 62b...screw hole, 62c...handrail insertion hole, 62d...contact portion, 63...screw, 64...base, 64a...fixing portion, 64b...mounting portion, 65...safety switch, 65a...actuator, 70...elastic force applying portion, 71...compression spring (elastic body), 71A...first compression spring (first elastic body), 71B...second compression spring (second elastic body), 72...intermediate body, 73...locking body, 74...core body, 75...guide body

Claims

1. As an inlet safety device provided in an inlet section having an inlet which is the entrance to the return section of a handrail, an actuator loosely fitted to the handrail so that its tip end protrudes outward from the inlet; a safety switch that is activated by contact and pressure when an actuator is pushed into the inlet and moves in the direction of movement of the handrail; an elastic force applying unit that applies an elastic force to the operating body directly or indirectly in a direction opposite to the moving direction of the operating body, The elastic force applying portion includes a first elastic body and a second elastic body arranged in series. Passenger conveyor.

2. As an inlet safety device, a movable body supporting the actuator; a base that supports the movable body so that the movable body can move in the moving direction of the handrail, The safety switch is activated when the actuator is pushed into the inlet and the movable body moves in the direction of movement of the handrail, and is contacted and pressed by the contact part of the movable body. The elastic force applying portion applies an elastic force to the movable body in a direction opposite to the direction of movement of the movable body.

2. A passenger conveyor according to claim 1.

3. the movable body and the base each have a mounting portion, and the two mounting portions face each other with a predetermined gap between them; The elastic force applying portion further includes: an intermediate body disposed between the two mounting portions so as to be movable in the moving direction of the movable body; a locking body that comes into contact with the intermediate body moving in the moving direction of the movable body and locks the intermediate body, thereby restricting further movement of the intermediate body; the first elastic body is disposed between the mounting portion of the movable body and the intermediate body, and the second elastic body is disposed between the intermediate body and the mounting portion of the base; The locking body is provided so as to abut against the intermediate body before the contact portion of the movable body comes into contact with the safety switch or at the same time as the contact portion of the movable body comes into contact with the safety switch.

3. A passenger conveyor according to claim 2.

4. When the elastic constant of the first elastic body is k1, the elastic constant of the second elastic body is k2, the distance between the contact portion of the movable body and the safety switch in the moving direction of the movable body is L1, and the distance between the intermediate body and the locking body in the moving direction of the movable body is L2, the following conditional expression is satisfied: L1≧[(k1+k2) / k1]L2 4. A passenger conveyor according to claim 3.

5. When the elastic constant of the first elastic body is k1 and the elastic constant of the second elastic body is k2, the following conditional expression is satisfied: k1>k2 A passenger conveyor according to any one of claims 1 to 4.

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