JP5743030B2 - Passenger conveyor safety device - Google Patents

Description

  The present invention relates to a safety device for passenger conveyors.

  In the safety device for passenger conveyors, the switch is pushed in when the door of the inspection opening is open. In this case, the passenger conveyor is stopped. On the other hand, when the door of the inspection opening is closed, the push of the switch is released. In this case, the passenger conveyor is ready for operation. According to the safety device, the passenger conveyor can be maintained in a stopped state even when the switch is stuck in a pressed state (see, for example, Patent Document 1).

Japanese Utility Model Publication 1-94381

  However, in the thing of patent document 1, even if a door becomes an open state, a switch may not be pushed in. In this case, the passenger conveyor is operable when the door is open.

  This invention was made in order to solve the above-mentioned subject, The objective is to provide the safety device of a passenger conveyor which can make a passenger conveyor a stop state reliably when a door is an open state. It is.

  The passenger conveyor safety device according to the present invention includes a switch provided near the inside of the inspection opening of the passenger conveyor, and a lever provided on the back surface of the door that opens and closes the inspection opening near the switch. , Provided between the switch and the lever, when the door is in a closed state, the rear surface of the door is contacted to release the switch from being pushed, and the door is opened from the closed state And an operating piece that is arranged so as to move by pushing the switch by contacting the lever from the opposite side of the door.

  According to this invention, when a door is an open state, a passenger conveyor can be reliably made into a stop state.

It is a side view of the principal part of the safety device of a passenger conveyor in Embodiment 1 of this invention. It is a side view of the principal part of the safety device of a passenger conveyor in Embodiment 1 of this invention. It is a perspective view of the mechanism part of the safety device of a passenger conveyor in Embodiment 1 of this invention. It is a side view of the operation piece of the safety device of a passenger conveyor in Embodiment 1 of this invention. It is a side view of the principal part of the safety device of a passenger conveyor in Embodiment 1 of this invention. It is a side view for demonstrating operation | movement when the door of the safety device of the passenger conveyor in Embodiment 1 of this invention changes from an open state to a closed state. It is a side view for demonstrating operation | movement when the door of the safety device of the passenger conveyor in Embodiment 1 of this invention changes from a closed state to an open state. It is a side view for demonstrating the operation mode of the safety device of the passenger conveyor in Embodiment 1 of this invention. It is a side view of the operation piece of the safety device of a passenger conveyor in Embodiment 2 of this invention. It is a perspective view of the operation piece of the safety device of the passenger conveyor in Embodiment 2 of this invention. It is a side view for demonstrating operation | movement when the door of the safety device of the passenger conveyor in Embodiment 2 of this invention changes from an open state to a closed state. It is a side view for demonstrating the operation | movement at the time of the door of the safety device of the passenger conveyor in Embodiment 2 of this invention changing from a closed state to an open state. It is a side view for demonstrating the operation mode of the safety apparatus of the passenger conveyor in Embodiment 2 of this invention.

  A mode for carrying out the invention will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
1 and 2 are side views of a main part of a passenger conveyor safety device according to Embodiment 1 of the present invention.

  In FIG. 1, the door 1 is provided so that the opening part for an inspection formed in the outer panel of a passenger conveyor or a landing floor board may be opened and closed. The door 1 is opened as necessary at the time of maintenance and inspection. Inside the passenger conveyor, a switch 2 is provided in the vicinity of one edge of the inspection opening. The switch 2 is provided with a plunger 3. The plunger 3 is provided so as to protrude in the horizontal direction from the switch 2 toward the inspection opening. The plunger 3 is set so as to stop the passenger conveyor when it is pushed to the switch 2 side, and to make the passenger conveyor operable when released from being pushed to the switch 2 side.

  The lever 4 is disposed closer to the center of the inspection opening than the tip of the plunger 3. The lever 4 is provided so as to protrude downward from the lower surface of the door 1. The tip of the lever 4 is formed to be bent vertically to the switch 2 side. A mechanism unit 5 is provided between the plunger 3 and the lever 4. The mechanism unit 5 has a function of mechanically determining whether the door 1 is opened or closed.

  As shown in FIG. 2, the mechanism unit 5 is formed so as to be in a state (state A) in which the plunger 3 is pushed toward the switch 2 when the door 1 is in the open state. As shown in FIG. 1, when the door 1 is in the closed state, the mechanism unit 5 comes into contact with the back surface of the door 1 so that the plunger 3 is released from being pushed into the switch 2 (state B). It is formed.

Next, the mechanism unit 5 will be described with reference to FIG.
FIG. 3 is a perspective view of the mechanism portion of the safety device for passenger conveyors according to Embodiment 1 of the present invention.

As shown in FIG. 3, the mechanism unit 5 includes a frame 5a, a shaft 5b, an operating piece 5c, and a restoring means (restoring body) 5d. The frame 5a is composed of two plates. The two plates are arranged in parallel so that the perpendicular line is in the horizontal direction. The shaft 5b is provided so as to be sandwiched between the upper portions of the two plates. Operation piece 5c is the axis 5b, is supported for rotation via a bearing only the like. The restoring means 5d is composed of a torsion spring or the like. The restoring means 5d is fitted into the shaft 5b on one side of the operating piece 5c. The restoring means 5d keeps the operating piece 5c at a predetermined angle so that the operating piece 5c is in the state A in the natural state. The restoring means 5d generates a restoring force for the operating piece 5c in accordance with a bidirectional angle change of the operating piece 5c.

Next, the operation piece 5c will be described with reference to FIG.
FIG. 4 is a side view of the operating piece 5c of the safety device for passenger conveyor in the first embodiment of the present invention.

  As shown in FIG. 4, the operating piece 5c is composed of one plate cam. That is, the operating piece 5c is formed such that the distance from the shaft 5b to the outer periphery changes according to the rotation angle. Specifically, a pressing portion 6a, a recess 6b, a contact portion 6c, and an operation portion 6d are formed on the outer peripheral surface of the operation piece 5c. The pushing portion 6a, the recessed portion 6b, the contact portion 6c, and the operation portion 6d are formed in the same cross section perpendicular to the shaft 5b.

  The pushing portion 6 a is formed so as to push the tip of the plunger 3 toward the switch 2 when facing the plunger 3. The recess 6b is formed at the center of the pushing portion 6a so that the pushing of the plunger 3 to the switch 2 side is released when facing the plunger 3. The contact portion 6c is formed so that the tip of the lever 4 contacts from the door 1 side when the door 1 is changed from the open state to the closed state, and contacts the back surface of the door 1 when the door 1 is closed. The operation part 6d is formed so that the tip of the lever 4 contacts from the side opposite to the door when the door 1 changes from the closed state to the open state.

Next, the operating range of the operating piece 5c will be described with reference to FIG.
FIG. 5 is a side view of the main part of the safety device for passenger conveyors according to Embodiment 1 of the present invention.

  As shown in FIG. 5, when the door 1 is completely closed, a space in which the operating piece 5 c can rotate is required between the back surface of the door 1 and the top end surface of the lever 4. The position and shape of the lever 4 are determined so as to secure the space.

Next, the operation when the door 1 is changed from the open state to the closed state will be described with reference to FIG.
FIG. 6 is a side view for explaining the operation when the door of the safety device for passenger conveyor according to Embodiment 1 of the present invention is changed from the open state to the closed state.

  As shown in the upper part of FIG. 6, when the door 1 is in the open state, the restoring means 5d is in a natural state. For this reason, the operation piece 5c is in the state A. In this case, the contact portion 6c of the operating piece 5c protrudes into the space where the door 1 was. The pushing portion 6a of the operating piece 5c pushes the plunger 3 toward the switch 2 side. As a result, the passenger conveyor is stopped. That is, the stopped passenger conveyor does not start operation. On the other hand, the passenger conveyor in operation stops.

  6, when the door 1 is moved downward, the tip of the lever 4 comes into contact with the contact portion 6c of the operating piece 5c from the door 1 side. By maintaining the contact, the operating piece 5c rotates by a predetermined angle. By the rotation, after the concave portion 6b of the operating piece 5c faces the plunger 3, the pushing portion 6a of the operating piece 5c faces the plunger 3.

  As shown in the lower part of FIG. 6, when the restoring force by the restoring means 5 d is normally applied, when the door 1 is completely closed, the contact portion 6 c of the operating piece 5 c is pushed against the back surface of the door 1. As a result, the operation piece 5c rotates. In this case, the operation piece 5c maintains the state B. At this time, the tip of the plunger 3 is fitted into the recess 6b of the operating piece 5c. For this reason, the plunger 3 is released from being pushed into the switch 2 side. As a result, the passenger conveyor is ready for operation.

Next, the operation when the door 1 is changed from the closed state to the open state will be described with reference to FIG.
FIG. 7 is a side view for explaining the operation when the door of the safety device for passenger conveyor according to Embodiment 1 of the present invention is changed from the closed state to the open state.

  As shown in the upper part of FIG. 7, when the door 1 is in the closed state, the operation piece 5 c maintains the state B. As a result, the passenger conveyor remains operable.

  As shown in the middle part of FIG. 7, when the door 1 is moved upward, the tip of the lever 4 comes into contact with the operation portion 6 d of the operating piece 5 c from the side opposite to the door 1. By maintaining the contact, the operating piece 5c rotates by a predetermined angle. The pushing portion 6a of the operating piece 5c faces the plunger 3 by the rotation.

  As shown in the lower part of FIG. 7, when the restoring force by the restoring means 5 d is normally applied, when the door 1 is completely opened, the operation portion 6 d of the operating piece 5 c is released from contact with the lever 4. . As a result, the operation piece 5c is in the state A. That is, the plunger 3 is pushed to the switch 2 side by the pushing portion 6a of the operating piece 5c. As a result, the passenger conveyor is stopped.

  Next, the operation when the door 1 is changed from the open state to the closed state when the restoring means 5d is damaged and the restoring force does not operate normally will be described using the middle part of FIG.

  In this case, even if the door 1 is completely closed, the operation piece 5c maintains the middle state of FIG. That is, the plunger 3 is maintained in a state of being pushed toward the switch 2 by the pushing portion 6a of the operating piece 5c. As a result, the passenger conveyor remains stopped.

  Even if the door 1 is opened from this state, the operation portion 6 d of the operating piece 5 c does not contact the tip of the lever 4. For this reason, the operation piece 5c maintains the middle state of FIG. That is, the plunger 3 is maintained in a state of being pushed toward the switch 2 by the pushing portion 6a of the operating piece 5c. As a result, the passenger conveyor remains stopped.

  Even if the door 1 is closed again from this state, the operation piece 5c maintains the middle state of FIG. That is, the plunger 3 is maintained in a state of being pushed toward the switch 2 by the pushing portion 6a of the operating piece 5c. As a result, the passenger conveyor remains stopped.

  Next, the operation when the door 1 is changed from the closed state to the open state when the restoring force by the restoring means 5d does not operate normally will be described using the middle part of FIG.

  In this case, even when the door 1 is completely opened, the operation piece 5c maintains the middle state of FIG. That is, the plunger 3 is maintained in a state of being pushed toward the switch 2 by the pushing portion 6a of the operating piece 5c. As a result, the passenger conveyor remains stopped.

  When the operating piece 5c is fixed in this state, the contact portion 6c of the operating piece 5c does not contact the tip of the lever 4 when the door 1 is closed again. In this case, the back surface of the door 1 directly presses the contact portion 6c of the operating piece 5c. As a result, the operation piece 5c is in a state B or a state exceeding the state B. When the operation piece 5c is in the state B, the passenger conveyor is in an operable state. When the operating piece 5c exceeds the state B, the passenger conveyor is stopped.

Next, the operation modes of the operation piece 5c are organized using FIG.
FIG. 8 is a side view for explaining an operation mode of the passenger conveyor safety device according to Embodiment 1 of the present invention.

  As shown in FIG. 8, the operation mode of the operation piece 5c changes according to the failure status of the restoring means 5d. Specifically, when the door 1 is closed, the state of the switch 2 changes according to the failure state of the restoring means 5d. As a result, whether or not the passenger conveyor is ready for operation changes. On the other hand, when the door 1 is in the open state, the switch 2 is turned off regardless of the failure status of the restoring means 5d. For this reason, when the door 1 is in the open state, the passenger conveyor is always stopped.

  According to the first embodiment described above, the opening / closing of the door 1 is determined by the mechanical operation of the mechanism unit 5. At this time, the passenger conveyor can be surely brought into a stopped state when the door 1 is in an open state, regardless of the failure state of the restoring means 5d. Moreover, it is not necessary to use a proximity sensor or the like for self-diagnosis of the failure. For this reason, even if lubricating oil or dust is scattered inside the passenger conveyor (especially inside the floorboard), or when water or detergent enters the passenger conveyor during rainy weather or cleaning, the passenger conveyor is reliably stopped. can do. As a result, the reliability of the safety device can be further increased.

Embodiment 2. FIG.
FIG. 9 is a side view of the operating piece of the passenger conveyor safety device according to Embodiment 2 of the present invention. FIG. 10 is a perspective view of the operating piece of the passenger conveyor safety device according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent, and description is abbreviate | omitted.

  The operating piece 5c of the first embodiment is formed by a single plate cam. On the other hand, the operating piece 5 c of the second embodiment is formed by the plate cam 7 and the flat plate component 8. The plate cam 7 includes a pushing portion 7a and a concave portion 7b. Specifically, the plate cam 7 has a concentric outer periphery as a pushing portion 7a, and only the concave portion 7b is removed. The flat plate-shaped part 8 serves as both the contact part 8a and the operation part 8b. The plate cam 7 and the flat plate-like component 8 are provided on different cross sections with respect to the shaft 5b. The plate cam 7 and the flat plate-like component 8 are provided so as to be able to rotate in synchronization with the shaft 5b as a center.

Next, the operation when the door 1 is changed from the open state to the closed state will be described with reference to FIG.
FIG. 11: is a side view for demonstrating operation | movement when the door of the safety device of a passenger conveyor in Embodiment 2 of this invention changes from an open state to a closed state.

  As shown in FIG. 11, the operation when the door 1 is changed from the open state to the closed state is the same as that in FIG. 6 of the first embodiment.

Next, the operation when the door 1 changes from the closed state to the open state will be described with reference to FIG.
FIG. 12 is a side view for explaining an operation when the door of the safety device for a passenger conveyor according to Embodiment 2 of the present invention changes from the closed state to the open state.

  As shown in FIG. 12, the operation when the door 1 is changed from the closed state to the open state is the same as that in FIG. 7 of the first embodiment.

Next, the operation mode of the operation piece 5c will be described with reference to FIG.
FIG. 13 is a side view for explaining an operation mode of the passenger conveyor safety device according to Embodiment 2 of the present invention.

  As shown in FIG. 13, the operation mode of the operation piece 5c is the same as that in FIG. 8 of the first embodiment. That is, when the restoring force by the restoring means 5d is normally applied, when the door 1 is opened, the operating piece 5c is in a state C corresponding to the state A of the first embodiment. When the restoring force by the restoring means 5d is normally applied, when the door 1 is in the closed state, the operation piece 5c is in the state D corresponding to the state B in the first embodiment. Even when the restoring force by the restoring means 5d does not act normally, when the door 1 is opened, the passenger conveyor is stopped.

  According to the second embodiment described above, the plate cam 7 can be manufactured only by removing the recess 6b from the existing concentric circular material. For this reason, the operating piece 5c can be manufactured more easily than in the first embodiment.

  As described above, the passenger conveyor safety device according to the present invention can be used for a passenger conveyor that can reliably stop the passenger conveyor when the door is open.

  DESCRIPTION OF SYMBOLS 1 Door, 2 Switch, 3 Plunger, 4 Lever, 5 Mechanism part, 5a Frame, 5b Shaft, 5c Operation piece, 5d Restoring means, 6a Pushing part, 6b Recessed part, 6c Contact part, 6d Operation part, 7 Plate cam, 7a Push-in part, 7b Recessed part, 8 Flat part, 8a Contact part, 8b Operation part

Claims (5)

A switch provided near the inside of the inspection conveyor opening,
In the vicinity of the switch, a lever provided on the back surface of the door that opens and closes the inspection opening,
It is provided between the switch and the lever, and when the door is closed, it comes into contact with the back surface of the door to release the switch from being pushed in, and when the door is opened from the closed state. An operation piece that is arranged to push the switch by moving when the lever contacts from the opposite side of the door;
A safety device for a passenger conveyor, comprising: A shaft that supports the operating piece so that the operating piece can rotate;
A restoring body that causes the operation piece to push the switch into a natural state, and generates a restoring force to the operation piece in accordance with a bidirectional angle change of the operation piece with respect to the axis;
The safety device for a passenger conveyor according to claim 1, comprising: The operating piece is
A push-in portion that pushes in the switch when facing the switch;
A depression formed in the center of the pushing portion so that the pushing of the switch is released when facing the switch;
A contact portion that contacts the lever from the door side when the door is closed from the open state, and a contact portion that contacts the back surface of the door so that the recess faces the switch when the door is closed; ,
An operation unit in which the lever contacts from the side opposite to the door so that the pushing portion faces the switch when the door is opened from the closed state;
The safety device for a passenger conveyor according to claim 2, comprising:   4. The passenger conveyor safety device according to claim 3, wherein the pushing portion, the concave portion, the contact portion, and the operation portion are arranged in the same cross section perpendicular to the axis. The operating piece is
A plate cam in which a circumferential outer periphery is the pushing portion, and the depression is formed in the pushing portion;
A flat plate which is formed in a cross section different from the plate cam with respect to the shaft, and which serves as the contact portion and the operation portion;
The safety device for a passenger conveyor according to claim 3, further comprising:

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