JP6818856B1 - Emergency braking device for passenger conveyors - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an emergency braking device for a passenger conveyor having a new configuration capable of adjusting the posture and position of a contact body while holding the position of a claw member while suppressing the complexity of an arm. An emergency braking device for a passenger conveyor according to an embodiment includes a first connecting shaft, a ratchet wheel, a claw member, an arm, a contact body, and a connecting portion. The connecting portion connects the tip end portion of the arm and the contact body. The contact body is provided with a hole. The connecting portion includes a second connecting shaft provided at the tip portion and inserted into the hole so as to be movable relative to the contact body and rotatable relative to the contact body in a direction intersecting the axial direction of the first connecting shaft. It has a fixing portion for fixing the position of the second connecting shaft with respect to the hole so that the relative position between the hole and the second connecting shaft in the direction intersecting the axial direction of the connecting shaft 1 can be adjusted. [Selection diagram] Fig. 2

Description

An embodiment of the present invention relates to an emergency braking device for a passenger conveyor.

Conventionally, the passenger conveyor is provided with an emergency braking device for the passenger conveyor that prevents the sprocket around which the drive chain is wound from rotating when the drive chain spanned between the two sprockets is slackened. As an emergency braking device for a passenger conveyor of this type, for example, a ratchet wheel fixed to a rotating shaft of a sprocket, a claw member that prevents the ratchet wheel from rotating, and an arm that is connected to the claw member via a connecting shaft. Some are provided with a contact body provided at the tip of the arm and mounted on a drive chain.

Japanese Unexamined Patent Publication No. 2008-21408

In the emergency braking device for passenger conveyors, for example, when the trajectory of the drive chain is changed due to a change in the sprocket or the like, it is necessary to adjust the posture and position of the contact body while maintaining the position of the claw member. In the conventional emergency braking device for a passenger conveyor, since the arm is provided with a structure for adjusting the posture and position of the contact body, there is a problem that the arm becomes complicated. Therefore, it would be beneficial to obtain a new configuration that can adjust the posture and position of the contact body while holding the position of the claw member while suppressing the complication of the arm.

The emergency braking device for a passenger conveyor according to the embodiment includes a first sprocket that is rotated by power from a drive source, a second sprocket that is provided apart from the first sprocket and drives a step, and the first sprocket. It is provided on a passenger conveyor provided with a drive chain spanning the sprocket and the second sprocket. The passenger conveyor emergency braking device includes a first connecting shaft, a ratchet wheel, a claw member, an arm, a contact body, and a connecting portion. The first connecting shaft is provided along the axial direction of the rotation shaft of the second sprocket and is rotatable. The ratchet wheel is fixed to the rotating shaft. The claw member is fixed to the first connecting shaft, rotates integrally with the first connecting shaft from a state separated from the ratchet wheel, and is hooked on the ratchet wheel to prevent the ratchet wheel from rotating. .. The arm extends from the first connecting shaft and rotates integrally with the first connecting shaft. The contact body is mounted on the drive chain. The connecting portion connects the tip end portion of the arm and the contact body. The contact body is provided with a hole. A second connecting portion is provided at the tip portion and is inserted into the hole so as to be movable relative to the contact body and rotatable relative to the contact body in a direction intersecting the axial direction of the first connecting shaft. The position of the second connecting shaft with respect to the hole can be adjusted so that the relative position between the connecting shaft and the hole and the second connecting shaft in the direction intersecting the axial direction of the first connecting shaft can be adjusted. It has a fixing portion for fixing.

FIG. 1 is a diagram showing a schematic configuration example of an escalator to which the emergency braking device for a passenger conveyor according to the embodiment is applied. FIG. 2 is a side view of the emergency braking device for a passenger conveyor according to the embodiment. FIG. 3 is a front view of a part of the emergency braking device for a passenger conveyor according to the embodiment. FIG. 4 is a front view of a detection unit in the emergency braking device for a passenger conveyor according to the embodiment. FIG. 5 is a side view of a part of the detection unit in the emergency braking device for a passenger conveyor according to the embodiment. FIG. 6 is a side view of a contact body in the emergency braking device for a passenger conveyor according to the embodiment. FIG. 7 is a side view of a base and a bearing of a fixed portion in the emergency braking device for a passenger conveyor according to the embodiment. FIG. 8 is a side view of a bearing of a fixed portion in the emergency braking device for a passenger conveyor according to the embodiment.

Hereinafter, the present invention will be described in detail with reference to the drawings. The following embodiments are examples, and the scope of the invention is not limited thereto. In addition, the components in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

In the present embodiment, the escalator 100 will be described as an example of a passenger conveyor that operates by rotating (circulating) a plurality of steps connected in an endless manner. The emergency braking device 1 of the escalator according to the embodiment is installed on the escalator 100 as shown in FIG. The escalator 100 is installed in a building (also referred to as a building), and the first floor of this building (hereinafter referred to as the lower floor) and the other floors above the lower floor (hereinafter referred to as the upper floor). ) And carry passengers. The emergency braking device 1 is an example of an emergency braking device for a passenger conveyor.

The escalator 100 mainly includes a truss structure frame 110, a plurality of steps 120, and a balustrade 130. Inside the truss structure frame 110, a frame (not shown) and a drive mechanism for the escalator 100 are arranged.

The drive mechanism 100a of the escalator 100 mainly includes a motor 105 as a drive source, a speed reducer 106, a drive chain 112, a drive wheel 113, a trailing wheel 114, and a step chain 115. The motor 105 is provided on the upper floor side. A speed reducer 106 is attached to the output shaft of the motor 105. The drive chain 112 is formed in an endless shape and is hung over the small sprocket 111 of the speed reducer 106 and the large sprocket 116 of the drive wheels 113. The drive chain 112 rotates the drive wheels 113 by circulating around the drive wheels 113 and the small sprocket 111 of the reduction gear 106 by the driving force of the motor 105 transmitted via the speed reducer 106. That is, the drive chain 112 transmits the driving force of the motor 105 transmitted via the speed reducer 106 to the drive wheels 113. The rotating shaft 117 (FIG. 2) of the small sprocket 111 and the rotating shaft 118 (FIG. 2) of the large sprocket 116 are parallel to each other. Further, the diameter of the large sprocket 116 is larger than the diameter of the small sprocket 111, and the number of teeth of the large sprocket 116 is larger than the number of teeth of the small sprocket 111. The small sprocket 111 is an example of the first sprocket, and the large sprocket 116 is an example of the second sprocket.

The escalator 100 operates by driving a step chain 115 spanned between the drive wheel 113 and the driven wheel 114 to orbit a plurality of step 120s connected in an endless manner.

When the escalator 100 operates in the downward direction, at the upper entrance (upper floor side entrance / exit 101), the adjacent steps 120 in the traveling direction among the plurality of steps 120 are horizontal and inside the truss structure frame 110. Will advance from. Then, in the upper transition curve, the step between the adjacent steps 120 is enlarged, and the plurality of steps 120 are transitioned in a step shape. Then, in the intermediate tilting portion, the plurality of steps 120 are lowered in a staircase pattern. Then, in the lower transition curve, the step between the adjacent steps 120 is reduced, and the plurality of steps 120 are changed horizontally. Then, at the lower exit (lower floor side entrance / exit 102), the plurality of steps 120 become horizontal again and enter the truss structure frame 110. Then, the plurality of steps 120 are inverted upward after entering the truss structure frame 110, and are raised horizontally on the return path side. Then, the plurality of steps 120 are inverted again, and are advanced from within the truss structure frame 110 at the entrance / exit 101 on the upper floor side. In the escalator 100 that operates in the ascending direction, the above operation is reversed. As described above, at the upper floor side entrance / exit 101 and the lower floor side entrance / exit 102, the step 120 advances from the inside of the truss structure frame 110 with the tread surface on the upper surface on which the user is placed horizontal, or the truss structure frame 110. Enter inside.

The escalator 100 includes a pair of balustrades 130 on both sides in the traveling direction of the plurality of steps 120. The balustrade 130 is mainly composed of a skirt guard panel (not shown), an inner deck 131, a glass 132, and a handrail belt 133. The skirt guard panels are close to each other on both sides in a direction (width direction) orthogonal to the traveling direction (downward direction and ascending direction in which the escalator 100 operates) of the plurality of steps 120, and are close to the upper floor side entrance / exit 101. It is provided between the entrance and exit 102 on the lower floor side. An inner deck 131 is attached to the upper side of the skirt guard panel. A glass 132 is attached to the upper side of the inner deck 131. A handrail belt 133 is movably fitted to a handrail rail (not shown) attached to the outer circumference of the glass 132. The escalator 100 is configured such that the handrail belt 133 of the balustrade 130 orbits by a handrail belt drive chain (not shown) in accordance with the progress and the direction of travel of the plurality of steps 120.

The emergency braking device 1 is provided in the drive mechanism 100a of the escalator 100, and prevents the rotation of the drive wheels 113, for example, when the drive chain 112 extends by a predetermined amount or more, that is, when the drive chain 112 becomes loose. As a result, the orbital movement of the step 120 is prevented. The emergency braking device 1 will be described in detail below.

FIG. 2 is a side view of the emergency braking device for a passenger conveyor according to the embodiment. FIG. 3 is a front view of a part of the emergency braking device for a passenger conveyor according to the embodiment. FIG. 4 is a front view of a detection unit in the emergency braking device for a passenger conveyor according to the embodiment. FIG. 5 is a side view of a part of the detection unit in the emergency braking device for a passenger conveyor according to the embodiment. FIG. 6 is a side view of a contact body in the emergency braking device for a passenger conveyor according to the embodiment. FIG. 7 is a side view of a base and a bearing of a fixed portion in the emergency braking device for a passenger conveyor according to the embodiment. FIG. 8 is a side view of a bearing of a fixed portion in the emergency braking device for a passenger conveyor according to the embodiment.

As shown in FIG. 2, the emergency braking device 1 includes a ratchet wheel 11, a claw member 12, a detection unit 13, and a connecting shaft 14.

The connecting shaft 14 is provided along the axial direction of the rotating shaft 118 of the large sprocket 116. In other words, the connecting shaft 14 is provided parallel to the rotating shaft 118 of the large sprocket 116. The connecting shaft 14 is rotatably supported by a pair of beam members 141 of the truss structure frame 110 via a support member 142. The connecting shaft 14 is an example of the first connecting shaft.

The ratchet wheel 11 is fixed to the rotation shaft 118 of the large sprocket 116 and rotates integrally with the large sprocket 116. The ratchet wheel 11 is spaced apart from the large sprocket 116.

The claw member 12 is fixed to a portion of the connecting shaft 14 facing the ratchet wheel 11. The claw member 12 extends from the connecting shaft 14 in the radial direction of the connecting shaft 14. The claw member 12 is provided in a state of being separated from the ratchet wheel 11. The claw member 12 rotates in the direction toward the ratchet wheel 11 integrally with the connecting shaft 14 from a state separated from the ratchet wheel 11 (standby position, initial position) and is caught by the ratchet wheel 11 to prevent the ratchet wheel 11 from rotating. To do. This prevents the large sprocket 116 from rotating.

As shown in FIGS. 2 and 3, the detection unit 13 includes an arm 15, a contact body 16, and a connecting unit 17. The detection unit 13 is provided at a portion of the connecting shaft 14 facing the drive chain 112.

The arm 15 is fixed to a portion of the connecting shaft 14 facing the drive chain 112. That is, the arm 15 is fixed to the connecting shaft 14 at a distance from the claw member 12. The arm 15 extends from the connecting shaft 14 in the radial direction of the connecting shaft 14. A contact body 16 is connected to the tip end portion 15a of the arm 15 via a connecting portion 17. The arm 15 rotates integrally with the connecting shaft 14. The arm 15 is composed of a single component (member).

The contact body 16 is mounted on the drive chain 112. The contact body 16 pushes the drive chain 112 downward by its own weight. The drive chain 112 slides with respect to the contact body 16. The contact body 16 also serves as a steady rest member that stops (suppresses) the runout of the drive chain 112. The contact body 16 is also referred to as a runout suppressing member or a shoe.

As shown in FIGS. 4 to 6, in detail, the contact body 16 has a base member 20 and a contact member 21. The base member 20 has walls 20a and 20b. The wall 20a extends in a direction orthogonal to the axial direction of the connecting shaft 14. The wall 20b extends in the axial direction of the connecting shaft 14 from the end of the wall 20a on the drive chain 112 side and is located above the drive chain 112. The base member 20 is made of, for example, a metal material.

The contact member 21 is fixed to the lower surface of the wall 20b and mounted on the outer peripheral portion of the drive chain 112. That is, the contact member 21 is in contact with the outer peripheral portion of the drive chain 112.

Further, as shown in FIG. 6, the contact body 16 is provided with a hole 16c. Specifically, the wall 20a is provided with a hole 16c. The hole 16c penetrates the wall 20a in the thickness direction of the wall 20a, that is, in the axial direction of the connecting shaft 14. Further, the hole 16c is an arc-shaped elongated hole that is convex in the direction away from the connecting shaft 14. The hole 16c has an arc shape around the center C3. That is, the center C3 is the center of the arc. The longitudinal direction of the hole 16c intersects (as an example, orthogonal) the axial direction of the connecting shaft 14. The distance between the center 16ca of the hole 16c and the center C3 is the same as the distance between the rotation center C1 of the connecting shaft 14 and the rotation center C2 of the connecting shaft 18 at the connecting portion 17. The contact body 16 can be attached to the arm 15 so that the center C3 and the rotation center C1 coincide with each other. In this case, the hole 16c can be said to have an arc shape centered on the rotation center C1. The rotation centers C1 and C2 are also referred to as center lines. The shape of the hole 16c is not limited to the above. For example, the hole 16c may be a linear elongated hole or the like.

Further, the contact body 16 is provided with two female screw portions 16b. Specifically, two female screw portions 16b are provided on the wall 20a. A hole 16c is located between the two female threads 16b.

As shown in FIGS. 4 and 5, the connecting portion 17 connects the tip portion 15a of the arm 15 and the contact body 16. The connecting portion 17 has a connecting shaft 18 and a fixing portion 19. The connecting shaft 18 is an example of the second connecting shaft.

As shown in FIG. 4, the connecting shaft 18 is provided at the tip end portion 15a of the arm 15. The connecting shaft 18 is inserted into the hole 16c so as to be movable relative to the contact body 16 and to be rotatable relative to the contact body 16. Specifically, the connecting shaft 18 is inserted into the hole 16c so as to be movable relative to the contact body 16 in a direction intersecting the axial direction of the connecting shaft 14. Specifically, the connecting shaft 18 is inserted into the hole 16c so as to be relatively movable with the contact body 16 along the longitudinal direction of the hole 16c (the direction along the arc shape of the hole 16c).

The fixing portion 19 fixes the position of the connecting shaft 18 with respect to the hole 16c so that the relative position between the hole 16c and the connecting shaft 18 can be adjusted. Specifically, the fixing portion 19 fixes the position of the connecting shaft 18 with respect to the hole 16c so that the relative position of the hole 16c and the connecting shaft 18 in the direction intersecting the axial direction of the connecting shaft 14 can be adjusted. Specifically, the fixing portion 19 fixes the position of the connecting shaft 18 with respect to the hole 16c in the longitudinal direction of the hole 16c so that the relative position of the hole 16c and the connecting shaft 18 in the longitudinal direction of the hole 16c can be adjusted. ..

As shown in FIGS. 4 and 5, in detail, the fixing portion 19 has a plate-shaped base 31, a bearing 32, and two fittings 33.

As shown in FIG. 7, the base 31 is provided with a hole 31a for the bearing 32 and two holes 31b for the fitting 33. The hole 31a penetrates the base 31 in the thickness direction of the base 31, that is, in the axial direction of the connecting shaft 14. A bearing 32 is inserted in the hole 31a. The hole 31b penetrates the base 31 in the thickness direction of the base 31, that is, in the axial direction of the connecting shaft 14. The hole 31b is formed in an arc shape (arc shape) along the hole 16c. The hole 31a is located between the two holes 31bc. A binder 33 is inserted in the hole 31b.

In the coupling tool 33 shown in FIG. 5, the coupling tool 33 is a male screw member such as a bolt or a screw. The binder 33 is coupled to the female screw portion 16b of the contact body 16 in a state of being inserted into the hole 31b of the base 31. As a result, the base 31 and the contact body 16 are fixed by the two binders 33 in a state where the base 31 and the wall 20a of the contact body 16 are overlapped with each other. Further, the coupling tool 33 can move relative to the base 31 along the longitudinal direction of the hole 31b (the direction along the arc shape of the hole 16c) in a state where the coupling tool 33 is not connected to the female screw portion 16b.

As shown in FIG. 8, the bearing 32 has a tubular portion 32a and a flange portion 32b protruding from an end portion of the tubular portion 32a. A connecting shaft 18 is inserted in the tubular portion 32a. The tubular portion 32a supports the connecting shaft 18 so as to be rotatable relative to the base 31. The bearing 32 is attached to the base 31 in a state where the tubular portion 32a is inserted into the hole 31a of the base 31 and the flange portion 32b is overlapped with the base 31. The bearing 32 is, for example, an OILES bearing. The bearing 32 may be another type of bearing.

In the emergency braking device 1 having the above configuration, when the drive chain 112 extends from the initial state, the contact body 16 moves downward while pushing the drive chain 112. As a result, the arm 15 rotates in one direction (clockwise in FIG. 2) about the connecting shaft 14. As a result, the claw member 12 rotates in one direction integrally with the arm 15 and approaches the ratchet wheel 11. That is, the detection unit 13 detects the elongation of the drive chain 112. Then, when the drive chain 112 extends by a predetermined amount or more, that is, when the detection unit 13 detects looseness (abnormality) of the drive chain 112, the claw member 12 is caught by the ratchet wheel 11 to prevent the ratchet wheel 11 from rotating. To do. As a result, the rotation of the large sprocket 116 is blocked, and by extension, the orbital movement of the step 120 is blocked.

Here, the specifications of the drive mechanism 100a may be changed, for example. For example, the small sprocket 111 or the large sprocket 116 may be replaced with one having a different diameter. In this case, since the trajectory of the drive chain 112 changes, it is necessary to adjust the posture and position of the contact body 16 with respect to the connecting shaft 14 so that the contact body 16 of the emergency braking device 1 makes proper contact with the drive chain 112. is there. At this time, by holding the position of the claw member 12 with respect to the ratchet wheel 11, a predetermined responsiveness of the emergency braking device 1 is ensured. Therefore, the contact is made while holding the position (standby position) of the claw member 12. It is necessary to adjust the posture and position of the body 16.

In adjusting the posture and position of the contact body 16, the worker first removes the fitting 33 from the female screw portion 16b. Next, the worker adjusts the posture and position of the contact body 16 with respect to the connecting shaft 14 so that the contact body 16 properly contacts the drive chain 112. At this time, the connecting shaft 18 can be moved relative to the hole 16c. Then, the worker connects the coupling tool 33 to the female screw portion 16b. At this time, since the hole 31b is an arc-shaped elongated hole, the relative posture of the base 31 (connecting shaft 18) and the contact body 16 can be adjusted.

As described above, in the present embodiment, the emergency braking device 1 is provided apart from the small sprocket 111 (first sprocket) and the small sprocket 111, which are rotated by the power from the motor 105 (drive source), and the step 120. The escalator 100 (passenger conveyor) is provided with a large sprocket 116 (second sprocket) for driving the sprocket and a drive chain 112 spanned between the small sprocket 111 (first sprocket) and the large sprocket 116. .. The emergency braking device 1 is provided along the axial direction of the rotating shaft 118 of the large sprocket 116, and is connected to the rotatable connecting shaft 14 (first connecting shaft) and the ratchet wheel 1111 fixed to the rotating shaft 118. A claw member 12 that is fixed to the shaft 14 and rotates integrally with the connecting shaft 14 from a state separated from the ratchet wheel 11 to prevent the ratchet wheel 11 from rotating by being hooked on the ratchet wheel 11, and extends from the connecting shaft 14 to be connected. An arm 15 that rotates integrally with the shaft 14, a contact body 16 mounted on the drive chain 112, and a connecting portion 17 that connects the tip portion 15a of the arm 15 and the contact body 16 are provided. The contact body 16 is provided with a hole 16c. The connecting portion 17 is provided at the tip portion 15a and is inserted into the hole 16c so as to be relatively movable with the contact body 16 and relatively rotatable with the contact body 16 in a direction intersecting the axial direction of the connecting shaft 14 (longitudinal direction of the hole 16c). The relative positions of the connecting shaft 18 (second connecting shaft) and the connecting shaft 18 in the direction intersecting the axial direction of the connecting shaft 14 (longitudinal direction of the hole 16c) can be adjusted with respect to the hole 16c. It has a fixing portion 19 for fixing the position of the connecting shaft 18.

According to such a configuration, since it is not necessary to divide the arm 15 into a plurality of (for example, two) parts (members), the arm 15 is not complicated, and the claw member 12 is contacted while maintaining the position. The posture and position of the body 16 can be adjusted. Further, in the present embodiment, it is not necessary to increase the thickness of the arm 15 (thickness along the axial direction of the connecting shaft 14).

Here, the emergency braking device 1 is required to improve the detection accuracy of the detection unit 13. The detection accuracy of the detection unit 13 tends to improve as the rotational moment around the connecting shaft 14 acting on the tip portion 15a of the arm 15 increases. On the other hand, in the present embodiment, since the connecting portion 17 (fixing portion 19) as a structure for adjusting the posture and position of the contact body 16 is provided at the tip end portion of the arm 15, the sliding portion 17 is provided in the middle portion of the arm. The detection accuracy of the detection unit 13 can be improved as compared with the configuration provided with the structure for adjusting the posture and position of the moving body.

Further, in the present embodiment, the hole 16c has an arc shape that is convex in the direction away from the connecting shaft 14.

According to such a configuration, the contact body 16 and the connecting shaft 18 can be relatively moved along the longitudinal direction of the hole 16c.

Further, in the present embodiment, the connecting portion 17 has a bearing 32 that rotatably supports the connecting shaft 18.

According to such a configuration, wear of the connecting shaft 18 can be suppressed.

According to the above embodiment, it is possible to obtain a new configuration capable of adjusting the posture and position of the contact body 16 while holding the position of the claw member 12 while suppressing the complexity of the arm 15.

In the above embodiment, the escalator 100 has been described as an example of a passenger conveyor that operates so that a plurality of step 120s connected in an endless manner move around, but the present embodiment is not limited to the escalator 100 and moves. The same can be applied to other types of passenger conveyors such as walkways.

Although some embodiments and modifications of the present invention have been described, these embodiments and modifications are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention as well as the invention described in the claims and the equivalent scope thereof.

1 ... Emergency braking device (emergency braking device for passenger conveyor), 11 ... Ratchet wheel, 12 ... Claw member, 14 ... Connecting shaft (first connecting shaft), 15 ... Arm, 15a ... Tip, 16 ... Contact body, 16c ... hole, 17 ... connecting part, 18 ... connecting shaft (second connecting shaft), 19 ... fixed part, 32 ... bearing, 105 ... motor (drive source), 111 ... small sprocket (first sprocket), 112 ... drive chain, 116 ... large sprocket (second sprocket), 118 ... rotating shaft.

Claims (3)

A first sprocket that is rotated by power from a drive source, a second sprocket that is provided apart from the first sprocket and drives a step, and is hung on the first sprocket and the second sprocket. An emergency braking device for a sprocket provided on a sprocket with a sprocket.
A rotatable first connecting shaft provided along the axial direction of the rotation shaft of the second sprocket,
The ratchet wheel fixed to the rotating shaft and
A claw member that is fixed to the first connecting shaft, rotates integrally with the first connecting shaft from a state separated from the ratchet wheel, and is hooked on the ratchet wheel to prevent the ratchet wheel from rotating.
An arm that extends from the first connecting shaft and rotates integrally with the first connecting shaft.
With the contact body mounted on the drive chain,
A connecting portion that connects the tip end portion of the arm and the contact body,
With
The contact body is provided with a hole.
A second connecting portion is provided at the tip portion and is inserted into the hole so as to be movable relative to the contact body and rotatable relative to the contact body in a direction intersecting the axial direction of the first connecting shaft. The position of the second connecting shaft with respect to the hole can be adjusted so that the relative position between the connecting shaft and the hole in the direction intersecting the axial direction of the first connecting shaft and the second connecting shaft can be adjusted. An emergency braking device for a passenger conveyor, which has a fixing portion for fixing. The emergency braking device for a passenger conveyor according to claim 1, wherein the hole has an arc shape that is convex in a direction away from the first connecting shaft. The emergency braking device for a passenger conveyor according to claim 1 or 2, wherein the connecting portion has a bearing that rotatably supports the second connecting shaft.

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