JP2014061968A - Fixing device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate attachment of a switch, which detects the operation of a fixing device, in an apparatus including the fixing device which fixes a car to a guide rail when a worker gets on the car and conducts work such as maintenance and inspection.SOLUTION: An engagement plate 9 having engagement holes 10 is provided at a desired position of a guide rail 2. An engagement shaft 16, which may move in a direction that the engagement shaft 16 engages with the engagement hole 10 and may rotate with the engagement shaft 16 movable direction set as an axis, is provided at the car 3. A guide piece 33 is provided at the engagement shaft 16 so as to move relative to the engagement shaft 16. Further, a guide hole 32, which inhibits the guide piece 33 from rotating around the axis of the engagement shaft 16 and allows the guide piece 33 to move in an axial direction, is provided at the car 3. Furthermore, a switch 40 which detects the axial movement of the guide piece 33 is provided.

Description

  The present invention relates to an apparatus for preventing a car from going up and down when an operator works on an elevator car.

  In elevator maintenance / inspection, when a worker rides on a car and performs work, the car may be fixed in the hoistway so that the car does not move up and down. An example of a car fixing device for fixing the car in the hoistway is disclosed in Patent Document 1.

The car fixing device described in Patent Document 1 will be described with reference to FIG.
In the figure, reference numeral 1 denotes an elevator hoistway, and a pair of guide rails 2 and 2 are erected in the hoistway 1, and a car 3 that moves up and down along the guide rails 2 and 2 is installed. Although a counterweight and its guide rail are also installed in the hoistway 1, they are not shown here.

Reference numeral 4 denotes a car frame, and guide shoes 5 are provided at four corners thereof, and these guide shoes 5 are slidably engaged with the guide rail 2. A main rope 6 connects the car frame 4 and the counterweight.
Reference numeral 7 denotes a support plate fixed to the guide rail 2 by a fastener 8 made of bolts and nuts, and a plurality of connecting holes 11 are formed in the vertical direction. 9 is an engagement plate in which a plurality of engagement holes 10 and connection holes 12 are opened in the vertical direction. By connecting the connection holes 11 and 12 with a fastener 13 made of bolts and nuts, On the other hand, the engagement plate 9 can be attached to be adjustable in the vertical direction.

A fixing device 15 is attached to the car frame 4 and has an engaging shaft 16 and an outer case 18. The engagement shaft 16 is formed of a cylindrical round bar member, and is disposed horizontally with the shaft facing the engagement plate 9 and is held by the outer case 18 so that it can advance and retreat in the axial direction and rotate about the axis. Reference numeral 17 denotes an operation projection provided on the engagement shaft 16, which is gripped and used by an operator when the engagement shaft 16 is rotated around the axis and the engagement shaft 16 is moved forward and backward in the axial direction. It is.
Reference numerals 19a and 19b denote engagement grooves formed in the outer case 18, and the operation projection 17 is engaged with any one of the engagement grooves 19a and 19b to fix the position of the engagement shaft 16 in the axial direction. Can do.

In the normal state, as shown in FIGS. 3 and 4, the operation protrusion 17 is engaged with the engagement groove 19 a, the engagement shaft 16 is in the retracted position, and the engagement shaft 16 interferes with the engagement plate 9. There is no.
When the car 3 is fixed in the hoistway 1 for maintenance and inspection, the car 3 is first stopped at a position where the engagement shaft 16 faces any of the engagement holes 10.
Next, an operator who rides on the car 3 rotates the operation protrusion 17 around the axis to release the engagement with the engagement groove 19a. Then, the engagement shaft 16 is moved (moved forward) in the direction of the engagement hole 10, and the tip of the engagement shaft 16 is engaged (inserted) into the engagement hole 10. Further, the engagement shaft 16 is rotated about the axis to engage with the engagement groove 19b.

Thereby, since the state in which the tip end portion of the engagement shaft 16 is engaged with the engagement hole 10 is maintained, the car 3 does not move up and down.
When changing the fixed position of the car 3, the engaging shaft 16 is engaged with the other engaging hole 10. When the fixing position of the car 3 is further changed, the connecting position of the engagement plate 9 to the support plate 7 may be changed.

By the way, when the car 3 is fixed using the above-described device, the car 3 is prevented from moving unexpectedly during the attaching / detaching operation of the car shaft 3 with the engaging hole 10. A switch for detecting movement may be provided.
An example in which this switch is provided will be described with reference to FIG. 5A is a schematic plan view, FIG. 5B is a side view, and the same reference numerals as those in FIGS. 3 and 4 denote the same components.

In the figure, reference numeral 20 denotes a mounting bracket for attaching the fixing device 15 to the car frame 4, and in this example, the fixing device 20 is disposed on the upper side of the car frame 4. Reference numeral 16 a denotes a notch formed on the side of the engagement shaft 16 opposite to the engagement hole 10, and reference numeral 21 denotes a bracket for attaching the switch 22 to the car frame 4. Reference numeral 23 denotes an operation lever having a roller 24 pivotally attached to the tip. When the roller 24 is in contact with the notch 16a, the switch 22 is turned on. When the roller 24 is removed from the notch 16a, the switch 22 is turned off. 3 is turned off.
A two-dot chain line indicates a state in which the operation projection 17 is engaged with the engagement groove 19 b and the engagement shaft 16 is engaged with the engagement hole 10. Since the operation of the switch 22 and the presence / absence of the support plate 7 are not directly related, the support plate 7 is omitted here.

  With this configuration, the switch 22 is turned off when the engagement shaft 16 moves in the direction of the engagement hole 10 (the left direction in FIG. 5A) for a predetermined distance or more, so that the car 3 is prevented from moving unexpectedly. be able to.

JP 2011-51733 A

In the above configuration, the roller 24 is pivotally attached to the operating lever 23 with the paper surface direction of FIG. 5A as an axis, and therefore the engagement shaft 16 moves in the axial direction (left and right direction of FIG. 5A). In this case, the roller 24 rolls on the notch 16a. However, if the engaging shaft 16 is rotated around the axis in order to remove the operation projection 17 from the engaging grooves 19a and 19b, an excessive force is applied to the roller 24. There is a problem that the roller 24 may be damaged.
Further, since the engaging shaft 16 performs a linear motion in the axial direction and a rotational motion around the shaft, it is difficult to mount and adjust the switch 22 at an optimal position. Further, even if the mounting direction of the roller 24 is changed, An excessive force is applied to the roller 24.

  Furthermore, it is conceivable to install a photoelectric device using a light beam instead of the switch 22, but in this case, there is a possibility that an erroneous detection such as the light beam being blocked by an operator or other foreign matter during the work may occur. Is concerned. For this reason, it is not preferable to install the photoelectric device in a place where high safety is required as in the present case.

  The present invention has an engagement portion, and is attached to an engagement body attached to a guide rail standing in an elevator hoistway, and a car that moves up and down along the guide rail, and engages with the engagement portion. An elevator comprising an engaging shaft that is movable to a forward position that moves and a retracted position that does not engage the engaging portion, and that is rotatable about the movable direction as an axis. Is provided with a guide that can move relative to the engagement shaft, and the cage is provided with a guide that prevents the guide from rotating around the axis and allows the guide to move in the axial direction. A detection device for detecting the movement of the guide element in the axial direction is provided.

Further, according to the present invention, the engagement shaft is rotatably held in an exterior case, and the exterior case and the detection device are attached to a guide plate, and the guide element is attached to the guide plate on the shaft. Guide holes are provided for guiding in the direction.
Further, according to the present invention, the engagement shaft is rotatably held by the exterior case, and the engagement shaft is provided with an operation projection, and the exterior case has an engagement groove in which the operation projection can be engaged. Are formed in the axial direction of the engaging shaft, and the engaging shaft is held by engaging the operating projection with the engaging groove.
Furthermore, in the present invention, the guide element is provided with an operation element protruding toward the anti-engagement body, the detection device is provided with a space into which the operation element can be inserted, and the detection device is provided with the operation element. Is an apparatus for detecting whether or not the image exists in the space.

  According to the present invention, since the guide of the engagement shaft does not rotate, the position adjustment of the switch is easy and it is possible to prevent an excessive force from being applied to the switch.

It is the top view and side view which show embodiment of this invention. It is a top view which shows other embodiment of this invention. It is a perspective view which shows the conventional elevator. It is principal part explanatory drawing of FIG. It is a top view which shows the conventional elevator car fixing device.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a state in which a fixing device is attached to a car frame. FIG. 1 (a) is a plan view, and FIG. 1 (b) is a side view. Shows things.

  In the figure, reference numeral 30 denotes a fixing device according to the present embodiment, which is fixed to a side surface of the car frame 4. Engaging grooves 19a, 19b and 19c are formed in the lower part of the outer case 18. Reference numeral 31 is a guide plate fixed to the upper surface of the outer case 18, 32 is a guide hole formed in the guide plate 31, and 33 is a guide element pivotally attached to the anti-engagement hole 10 side of the engagement shaft 16 by a bolt 34. The upper part is inserted into the guide hole 32. An operation element 35 is provided on the guide element 33 so as to protrude toward the counter-engagement hole 10.

  Reference numeral 40 denotes a switch attached to the lower surface of the guide plate 31. The switch 40 has a space 41 in the upper part thereof.

  In a normal state, as indicated by a solid line, the operation protrusion 17 is engaged with the engagement groove 19a, the engagement shaft 16 is in a retracted position separated from the engagement hole 10, and the operation element 35 is connected to the switch 40. Since it is inserted into the space 41, the switch 40 is maintained in the ON state.

  When the car 3 is fixed for maintenance / inspection or the like, an operator riding on the car 3 rotates the operation protrusion 17 around the axis and removes it from the engaging groove 19a. At this time, since the upper portion of the guide element 33 is inserted into the guide hole 32, the guide element 33 does not rotate. When the engagement shaft 16 is moved in the direction of the engagement hole 10 (left direction in FIG. 1), the guide element 33 is also moved leftward along the guide hole 32, and the operation element 35 comes out of the space 41. As a result, the switch 40 is turned OFF. Further, as shown by a two-dot chain line, the engagement shaft 16 maintains the engaged state with the engagement hole 10 by engaging the operation protrusion 17 with the engagement groove 19b or 19c.

  Here, the reason why there are two engagement grooves 19b and 19c depends on the size of the distance between the fixing device 16 and the engagement hole 10 and the size of the space on the back surface (left side in FIG. 1) of the engagement hole 10. This is because the amount of protrusion of the engagement shaft 16 on the engagement hole 10 side can be selected. Therefore, when such a consideration is unnecessary, it is sufficient to provide either one of the engagement grooves 19b or 19c. Conversely, the engagement groove can be increased so that it can be applied to various types of elevators.

With this configuration, the operating element 35 that operates the switch 40 does not rotate, and only approaches and separates from the switch 40, so that the switch is not damaged as in the conventional example.
Since the engaging shaft 16 and the switch 40 are both attached to the guide plate 31 and the movement of the guide 33 is restricted by the guide hole 32 of the guide plate 31, the space between the switch 41 and the space 41 of the switch 40 is preset in the factory. If adjustment with the operating element 35 is performed, there is no need to make another adjustment at the site. Moreover, even if it becomes necessary to make an adjustment on site, the adjustment can be easily performed.

Further, the operation element 35 is configured to be inserted into the space 41, and since the overlap between the operation element 35 and the space 41 in the axial direction (left-right direction in FIG. 1) is relatively large, the engagement shaft 16 and the outer case 18 Even if there is a manufacturing error or an installation error, it can be practically used without any problem, and the position adjustment between the engagement shaft 16 and the switch 40 is not required to be precise.
Furthermore, since the operation element 35 is inserted into the space 41 of the switch 40, there is almost no possibility that the switch 40 will make a false detection during work, and high safety can be ensured.

In the above-described embodiment, the switch 40 is disposed so as to face the counter-engagement hole 10 side of the engagement shaft 16, but may be disposed so as to face the circumferential surface of the engagement shaft 16.
For example, as shown in FIG. 2 corresponding to FIG. 1A, the thickness of the guide 33a in the axial direction (left and right in FIG. 2) is increased, and the roller 51 of the switch 50 is formed on the circumferential surface of the guide 33a. Arrange them so that they touch each other. According to this configuration, since the thickness of the guide 33a is thick, the position adjustment between the switch 50 and the guide 33a does not require precision.

In each of the above-described embodiments, the engagement shaft 16 has a columnar shape, but is not limited to a columnar shape, as long as it can move in the axial direction and rotate around the axis.
Further, the guide element 33 does not need to be pivotally attached to the engagement shaft 16 and may be configured to follow the movement in the axial direction without following the rotation of the engagement shaft 16 around the axis.
Furthermore, the engagement hole 10 is not necessarily limited to a hole, and may have another shape such as a notch as long as the engagement shaft 16 can be prevented from moving up and down.

2 Guide rail 3 Car 4 Car frame 9 Engagement plate (engagement body)
10 Engagement hole (engagement part)
15, 30 Fixing device 16 Engagement shaft 17 Operation protrusion 18 Exterior case 19a, 19b, 19c Engagement groove 22, 40, 50 Switch (detection device)
31 Guide plate 32 Guide hole 33, 33a Guide 34 Bolt 35 Operator 41 Space

Claims (4)

An engagement body having an engagement portion and attached to a guide rail standing in an elevator hoistway;
Attached to a car that moves up and down along the guide rail, is movable to a forward position that engages with the engaging portion and a retracted position that does not engage with the engaging portion, and the movable direction is used as an axis. An elevator comprising a pivotable engagement shaft,
The engaging shaft is provided with a guide that can move relative to the engaging shaft, and the cage prevents the guide from rotating about the shaft and allows the guide to move in the axial direction. An elevator car fixing device, characterized in that a guide is provided, and a detection device for detecting movement of the guide element in the axial direction is provided.   The engaging shaft is rotatably held in an exterior case, and the exterior case and the detection device are attached to a guide plate, and the guide plate guides the guide element in the axial direction. The elevator car fixing device according to claim 1, wherein a hole is provided.   The engagement shaft is rotatably held in the outer case, and the engagement shaft is provided with an operation protrusion, and the outer case has an engagement groove in which the operation protrusion can be engaged. The elevator car according to claim 1 or 2, wherein three or more are formed in an axial direction, and the engagement shaft is held by engaging the operation protrusion with the engagement groove. Fixing device.   The guide element is provided with an operation element that protrudes toward the anti-engagement body, the detection device is provided with a space into which the operation element can be inserted, and the detection device has the operation element in the space. The elevator car fixing device according to any one of claims 1 to 3, wherein the device is a device for detecting whether or not to perform the operation.

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