JPH09110335A - Alignment device of guide rail of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To align a guide rail with precision in a short time without depending on a degree of skill of a worker. SOLUTION: Elongation contact devices 331, 332 having elongation members 33a, 33b which come into contact with two opposing side faces of a lift passage wall by applying propping force are provided 111 a base member 30. Grip devices 45a, 45b are provided in the base member 30 through a first position adjusting device 42 and second position adjusting devices 481, 482. The grip devices 45a, 45b grip rail members 4a, 4b in a condition in which they are supported by the elongation contact devices 331, 332 and a degree of verticality is held, and the rail members 4a, 4b are displaced by operating the first position adjusting device 42 and the second position adjusting devices 481, 482 to perform alignment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator guide rail centering device.

[0002]

2. Description of the Related Art As a conventional centering device for a guide rail of an elevator, a device described in Japanese Patent Laid-Open No. 61-127583 is known.
This will be described with reference to FIG.

First, as shown in FIGS. 11 and 13, a pair of piano wires 1a and 1b are stretched in the hoistway 3, and a plurality of rail members 4a on the same side with one piano wire 1a as a reference.
4n are sequentially erected over the entire length of the hoistway 3 and are connected to each other to form an integrated guide rail 4, and similarly, a plurality of rail members 5a on the other side with the other piano wire 1b as a reference. 5b are sequentially erected over the entire length of the hoistway 3, and the guide rails 5 are connected to each other to form an integrated guide rail 5.

The standing work of the guide rails 4 and 5 is performed according to the flow chart shown in FIG. 12. First, in step S1, a pair of piano wires 1a and 1b are removed from the machine room 2 with reference to a predetermined position of a building (not shown). The lowermost rail member 4n is centered on the lower part of the hoistway 3 while being hung in the hoistway 3 and using the piano wire 1a as a reference in step S2, and in that state, the lowermost rail member 4n is passed through a rail bracket (not shown). Fix it.

Similarly, the lowermost rail member of the other guide rail 5 is erected and centered and fixed with the piano wire 1b as a reference. Then, in step S3, as shown in FIG. 11, the rail member 4a is lifted by driving the winch 6, and another rail member 4 is attached to the lower end of the rail member 4a.
The upper and lower ends of b are connected, the connected rail members 4a and 4b are suspended, and the lower end of the rail member 4b is connected to the upper ends of other rail members 4c.
After sequentially connecting the rail members over the entire length of, the lower ends of the rail members connected in step S4 are connected to the lowermost rail member 4.
The guide rail 4 is connected to the upper end of n to form an integrated guide rail 4, and the upper end of the guide rail 4 integrated in step S5, that is, the upper end of the rail member 4a is held on the floor 2a of the machine room 2.

Similarly, the rail member on the other side is also made into an integrated guide rail 5, and its upper end is held on the floor 2a of the machine room 2.

Then, in step S6, the guide rail 4
Of the lowermost rail member 4n and the lowermost rail member 5n of the guide rail 5 to raise the car frame 7 and the working floor 8 by driving a hoist (not shown) in the machine room 2, and at step S7, the working floor 8 An operator riding on the center of the guide rail 4 and the guide rail 5 fixes the guide rail 4 and the guide rail 5.

In the actual centering operation, the centering device 9 shown in FIG. 14 which is an enlarged plan view showing the main part of FIG. 13 is used. The centering device 9 is a rod-shaped base 10 installed on the work floor 8 and extending in the horizontal direction, and a gripping device 11 and a reference part 1 provided at one end of the base 10.
2 and a gripping device 13 and a reference portion 14 provided at the other end of the base portion 10.

The gripping device 11 has a fixed member 11a and a movable member 1 which sandwich a rail member 4a constituting the guide rail 4.
1b and a bolt 11c that clamps the rail member 4a by tightening them, and the reference portion 12 has a reference surface 12a formed at one end thereof in the X direction which is the left-right direction of FIG. 14 has a reference line 12b in the Y direction which is the vertical direction in FIG.
Similarly, the gripping device 13 and the reference portion 14 also include a fixed member 13a and a movable member 13b that sandwich the rail member 5a that constitutes the guide rail 5, and a bolt 13c that clamps the fixed member 13a and the movable member 13b to grip the rail member 5a. Part 1
14 has a reference surface 14a formed on one end thereof in the X direction which is the left-right direction of FIG.
The Y direction reference line 14b, which is the vertical direction of, is attached.

The centering and fixing work of the rail members 4a, 5a using the centering device 9 is performed as follows. First, the guide portion 41a of the rail member 4a is attached to the gripping device 1
1 and then, in this state, the fixing portion 4 of the rail member 4a.
2a is temporarily fixed to the car side bracket 15b by the rail clip 15a. The rail clip 15a is connected to a car side bracket 15b, and the car side bracket 15b is bolted to a hoistway bracket 15c fixed to the hoistway wall 16 by an anchor bolt (not shown).

Similarly, the guide portion 51a of the rail member 5a is gripped by the gripping device 13, and in this state, the rail member 5a is held.
By temporarily fixing the fixing portion 52a of the rail member 5a with the rail clip 16a, the rail member 5a is attached to the hoistway wall 17 via the car side bracket 16b and the hoistway side bracket 16c.
Is temporarily fixed. After that, the operator moves the rail member 4a in the X direction while hitting the cage bracket 15b with a hammer (not shown) so that the distance from the piano wire 1a to the reference surface 12a of the reference portion 12 becomes a predetermined dimension. The rail member 4a is moved in the Y direction while hitting the hoistway bracket 15c with a hammer (not shown) so that the distance from the piano wire 1a to the reference line 12b of the reference portion 12 becomes a predetermined dimension.

Similarly to this work, the operator moves the rail member 5a in the X direction while striking the cage bracket 16b with a hammer (not shown) to move from the piano wire 1b to the reference portion 1.
The distance to the reference plane 14a of No. 4 is set to a predetermined dimension, and the rail member 5a is moved in the Y direction while hitting the hoistway bracket 16c with a hammer to move the piano wire 1
The distance from b to the reference line 14b of the reference portion 14 is set to a predetermined dimension. After centering the rail members 4a, 5a in this way, the car-side rail brackets 15b, 16
b and hoistway side brackets 15c and 16c are fully tightened to fix the rail members 4a and 5a to the hoistway wall 16,
Fix it to 17.

[0013]

However, the conventional elevator guide rail centering device grips the rail members 4a and 5a with the rail clips 15a and 16a,
After being temporarily fixed to the hoistway side brackets 15c and 16c through the car side brackets 15b and 16b, the piano wire 1
While striking the car-side brackets 15b and 16b and the hoistway-side brackets 15c and 16c so that the reference portions 12 and 14 are arranged at predetermined positions with respect to a and 1b, the rail members 4a and 5a are respectively moved in the X and Y directions. Since it is necessary to move and center it and then permanently fix it, it takes a lot of time to adjust its position, which deteriorates the work efficiency. Further, the operator visually confirms the distance from the piano wire 1a to the reference surface 12a and the reference line 12b, and the distance from the piano wire 1b to the reference surface 14a and the reference line 14b, while checking the cage side brackets 15b and 16b.
Since the position adjustment is performed by hitting the hoistway side brackets 15c and 16c, it is a delicate adjustment work, and there is a concern that the centering accuracy may decrease depending on the skill level of the operator and the centering accuracy may decrease.

An object of the present invention is to provide an elevator guide rail centering device capable of accurately centering the guide rail in a short time without depending on the skill of the operator.

[0015]

In order to achieve the above-mentioned object, the present invention has a guide rail core of an elevator for centering a rail member at a predetermined position in a hoistway with a piano wire hanging down in the hoistway as a reference. In the feeding device, an extension contact device that extends and contacts the hoistway wall and detachably fixes the base member between the hoistway walls; and a position adjustment in the extension direction of the extension contact device supported by the base member A first position adjusting device, a second position adjusting device supported by the base member and capable of position adjustment in a direction orthogonal to the extension direction of the extension contact device in the same plane, and the first and second While being supported by the base member via the position adjusting device of
The gripping device has a moving piece that comes into contact with the back surface of the rail member and retracts, and a fixed piece that faces the moving piece and is located above and below the moving piece, and moves according to the movement of the moving piece. A reference member capable of gripping the rail member is provided between the piece and the fixed piece.

The elevator guide rail centering device according to the present invention detachably fixes the base member to the hoistway wall by extending the extension contact device as described above, and the base member is fixed to the fixed base member. For example, since a gripping device that grips the rail member via the first and second position adjusting devices so as to be positionally adjustable in the X direction and the Y direction is provided, in a state where the entire device is stably held on the hoistway wall, Since the position adjusting device can be operated to change the gripping device and the rail member can be centered, the centering of the rail member can be performed easily and in a short time regardless of the skill of the operator. This makes it unnecessary to perform centering work while hitting the car side bracket and hoistway side bracket with the rail members temporarily fixed as in the past, and the work efficiency of centering and fixing work is increased. It is possible to improve on.

Further, since the gripping device is formed of the moving piece and the fixed pieces located on the upper and lower parts of the moving piece, and the range for holding the rail member is wide in the vertical direction, the verticality thereof is increased. The rail member can be held and held.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an elevator guide rail centering device according to an embodiment of the present invention.
FIG. 4 is a plan view showing a state in which a guide rail centering device for an elevator is arranged on a handrail of a work floor.

At both ends of the cylindrical base member 30, extension contact devices 33 which can extend in the axial direction of the base member 30 are provided.
1, 332 are configured respectively. One of the extension contact devices 331 is an extension member 33 attached to the base member 30 so as to be slidable in the axial direction as shown in FIG.
a and an abutting body 31a provided at the tip of the extension member 33a and made of an elastic body such as rubber that abuts the hoistway wall 3a.
And a releasable holding mechanism for fixing the extension member 33a to the base member 30 when the contact body 31a contacts the hoistway wall 3a. This holding mechanism is represented by the lever 32a. ing.

The extension contact device 332 provided on the other side of the base member 30 has a base member 3 as shown in FIG.
0, and an abutting member 3 made of an elastic material such as rubber that abuts on the hoistway wall 3b provided at the tip of the extending member 33b.
1b and a releasable holding mechanism for fixing the extension member 33b to the base member 30 when the abutment body 31b comes into contact with the hoistway wall 3b. Extrusion Clamp 35 Connected to 33b
A lever 35a for applying a pushing force to the pushing clamp 35, a base plate 34 to which the pushing clamp 35 and the lever 35a are attached, and the base plate 3
4 is fixed to the base member 30 and a lever 32b.

On the sides of the extension contact devices 331, 332,
There is a gauge member 38 movably inserted and juxtaposed in the guide member 18 fixed to an appropriate position of the base member 30, so that the gauge member 38 is axially moved and adjusted by the first position adjusting device 42. Is configured.

The first position adjusting device 42 connects the female screw portion 36 that is coupled to the base member 30 and the X-direction adjusting screw portion 37 that is screwed to the female screw portion 36.
b, and by being attached to the X-direction adjusting screw portion 37 and rotating, the gauge member 38 is displaced via the connecting member 42b in the axial direction thereof, that is, in the X-direction which is the direction in which the extension contact devices 331, 332 slide. Dial section 42
a and a holding portion 38a, 38b respectively connected to both ends of the gauge member 38. The holding portion 38a, 38b is displaceable in the Y direction which is a direction perpendicular to the X direction described above. Second position adjusting devices 481 and 482, respectively. The second position adjusting device 481 includes a connecting portion 72a fixed to the holding portion 38a, a Y-direction adjusting screw portion 47a extending in the Y direction and fitted in the connecting portion 72a as shown in FIG. 1, and a Y-direction adjusting device. Dial part 48 connected to the front end of the screw part 47a
a, a female screw portion 46a screwed on the other end of the Y-direction position adjusting screw portion 47a, and a base plate 71a which is coupled to a lower portion of the female screw portion 46a and is slidably supported with respect to the holding portion 38a. By rotating the dial portion 48a, the base plate 71a can be displaced in the Y direction which is a direction perpendicular to the direction in which the extension contact devices 331 and 332 slide.

The second position adjusting device 482 includes a connecting portion 72b fixed to the holding portion 38b, and a Y direction adjusting screw portion 47b extending in the Y direction and fitted into the connecting portion 72b as shown in FIG. The dial portion 48b coupled to the front end of the Y-direction adjusting screw portion 47b, the female screw portion 46b screwed at the other end of the Y-direction adjusting screw portion 47b, and the lower portion of the female screw portion 46b. And a base plate 71b slidably supported with respect to the holding portion 38b. By rotating the dial portion 48b, the base plate 71b can be displaced in the Y direction.

On these base plates 71a, 71b, gripping devices 45a, 45b for gripping the rail members 4a, 4b in a releasable manner are formed. The gripping devices 45a and 45b come into contact with the back surfaces of the rail members 4a and 4b, and come into contact with the back surface contact portions 39a and 39b, which are moving pieces for retracting the rail members 4a and 4b, and the guide surfaces of the rail members 4a and 4b. The guide surface contact portions 40a, 40b and the tension clamps 44a, 44b for holding the rail members 4a, 4b under pressure are provided.
a, 39b, guide surface abutting portions 40a, 40b, and reference surfaces 41a, 410a, 40 that are fixed pieces that face the moving piece and are positioned so as to sandwich the moving piece in the vertical direction.
rail members 4a, 4 in the area surrounded by b, 410b.
b is arranged and the rail clamps 4a and 4b are clamped when the pull clamps 44a and 44b are operated. The reference surfaces 41a, 410a, 41b, 4
As shown in FIG. 9 which is an enlarged view of portion A of FIG. 1 and FIG. 10 which is a cross-sectional view thereof, the rear contact portions 39a and 39b are provided.
Since it is mounted on the mounting plates 91a and 91b so as to sandwich the back contact portion between the upper and lower parts facing b, it is possible to hold the rail members 4a and 4b while maintaining their verticality. . Reference members 411 and 412 are fixedly coupled to the upper portions of the base plates 71a and 71b, respectively, and the reference members 411 and 412 are fixed to the gripping device 45.
Reference planes 41a, 410a, 41b, 410b for holding the rail members 4a, 4b between a and 45b, and the hanging positions of the piano wires 1a, 1b hanging in the hoistway and the centering of the elevator guide rails. It is composed of reference plates 43a and 43b which serve as a reference for the relative position to the device.

Next, the centering work of the rail members 4a and 4b will be described using the centering device for the elevator guide rails described above.

When centering the rail members 4a and 4b, first, as shown in FIG. 2, the base member 30 is placed on the handrail 50 of the work floor 8 provided on the car.
The contact extension devices 331, 332 are installed in the retracted state by retracting the contact extension devices 331, 332 to the innermost position. Not
Leave open as shown.

In this state, the car is moved and stopped so that the work floor 8 comes to the predetermined installation and fixed position of the rail members 4a and 4b. While the car is moving, the reference members 411 and 412 and the rails are moved. In order to prevent the members 4a and 4b from coming into contact with each other and causing the elevator guide rail centering device as a whole to lose balance, the holding portions 38a and 38b are provided with balance plates 51a and 51b, respectively. It is engaged on the slide 50.

Further, the balance plates 51a, 51
Since b is engaged with the holding portions 38a, 38b so as to be vertically displaceable, the vertical position adjustment of the entire centering device can be performed here.

Next, when the car is moved to the centering position of the rail members 4a and 4b, as shown in the plan view of FIG. 3, the contact body 31b provided at the end of the extension contact device 332 is removed. The extension member 33b is slid until it abuts on the hoistway wall 3b, and then the lever 32b is rotated to the position shown in FIG. 3 to suppress the extension member 33b from sliding and to be fixed to the base member 30. Next, as shown in the plan view of FIG. 4, the extension member 33a is slid until the contact body 31a provided at the end of the extension contact device 331 contacts the opposite hoistway wall 3a, and then the lever By rotating 32a to the position shown in FIG. 4, the extension member 33a is prevented from sliding and is fixed to the base member 30. That is, in the state of FIG. 4, each extension contact device 331,
332 is fixed to the base member 30 and is held in contact with the hoistway walls 3a and 3b in an integrated state. Next, as shown in the front view of FIG.
When the pushing force in the direction of the arrow 52 is applied to the contact body 31b through the push-out clamp 35 and the extension member 33b by tilting in the direction of, the extension contact in the state of being held integrally with the extension contact device 332 is performed. A reaction force is also generated in the contact device 331 in the direction of the arrow 53, and the contact bodies 31a and 31b made of an elastic body such as rubber come into contact with the hoistway walls 3a and 3b and bend, so that they extend with the base member 30. The contact devices 331 and 332 are
The hoistway walls 3a and 3b are firmly held by a constant tension force.

When the centering device for the guide rails of the elevator is thus held by the constant tension force on the hoistway walls 3a, 3b, then the gripping devices 45a, 45b as shown in the plan view of FIG. Although the rail members 4a and 4b are held under pressure by means of the above, at present, they are in an open state as shown in the plan view of FIG. Therefore, when the lever portion 55a of the pulling clamp 44a of the gripping device 45a is pulled, as shown in FIG.
As shown in the plan view of FIG. 3, the rail member 4a is pulled in by the back surface abutting portion 39a, and the back surface abutting portion 39a and the guide surface abutting portion 4a.
0a and the reference surface 41a of the reference member 411, the rail member 4a is clamped and held. At the time of this withdrawal, the rail member 4a is tilted or the pull clamp 44
The rail member 4a is moved in the direction of the arrow 56, that is, the position of the center of gravity 57 of the rail member 4a so as not to apply an unreasonable force to a.
Pulling clamp 4 so that pulling force is applied in the direction of
The angle of 4a is set. Further, the gripping device 45b is also configured in the same manner, and holds the rail member 4b under pressure.

Next, the position adjusting work for the centering position of the rail members 4a and 4b, which are indirectly fixed to the hoistway walls 3a and 3b, will be described.

First, the dial portion 42a of the first position adjusting device 42 attached to the gauge member 38 shown in FIG. 1 is rotated to displace the gauge member 38 in the X direction, and the both ends of the gauge member 38 are joined. Holding members 38a, 38
Displace b in the X direction. The holding members 38a, 38b
Since gripping devices 45a and 45b for gripping the rail members 4a and 4b are provided on the upper part of the rail member 4a,
The positions of a and 4b are also displaced by the rotation of the dial portion 42a of the first position adjusting device 42, and the distance between the piano wires 1a and 1b and the reference plates 43a and 43b, that is, the X dimension shown in FIG. You can For this reason, the rail members 4a and 4b are held in a state where the core at the position in the X direction in the hoistway is extended.

Next, the second position adjusting devices 481 and 48
The second dial portions 48a and 48b are rotated to displace the base plates 71a and 71b in the Y direction. Above the base plates 71a, 71b are rail members 4a,
Since the gripping devices 45a and 45b that grip the 4b are supported, the rail members 4a and 4b are also displaced as they are. While displacing the rail members 4a and 4b in the Y direction, the distance between the piano wires 1a and 1b and the marking lines 58a and 58b attached to the reference plates 43a and 43b, that is, Y in FIG.
Dial parts 48a, 4 so that the dimensions are within the allowable value
When the operation of 8b is stopped, the rail members 4a and 4b are held in a state where the center of the position in the Y direction in the hoistway is extended. In this way, when the predetermined centering position to which the rail members 4a and 4b should be attached is determined, the rail members 4a,
4b, the rail bracket is assembled and the rail members 4a and 4b are permanently fixed to the hoistway walls 3a and 3b.
In this work, the temporary fixing work of the rail member, which was necessary in the conventional example, can be omitted, and the position adjusting work can be performed easily and accurately.

After that, when the main fixing of the rail members 4a, 4b is completed, the pull clamps 44a, 44b are returned, and the rail members 4a, 4b by the gripping devices 45a, 45b.
The holding of b is released, and the lever 35 of the extrusion clamp 35 is released.
a in the opposite direction of arrow 51, and levers 32a, 3
2b is returned to the original position, and the extension members 33a and 33b are pulled inward to obtain the state shown in FIG. 2 before the start of work. The elevator car can then be moved to the next working position. In this way, the rail members 4a, 4
The work of gripping and releasing b can be easily performed by operating the pull clamps 44a and 44b provided on the gripping devices 45a and 45b.

As described above, according to this embodiment, the centering device for the guide rails of the elevator is used as the extension contact device 33.
1, 332 and holding devices 63a, 63b and the like are releasably supported on the hoistway wall, and the guide members 4a, 4b are provided so that their positions can be adjusted. It is not necessary to temporarily fix 4b to support the whole, and it is not necessary to perform a position adjusting work with a hammer or the like for temporarily fixing the first position adjusting device to the base member 30 supported on the hoistway wall. The guide members 4a and 4b can be displaced while operating the 42 and the second position adjusting devices 481 and 482 to easily perform centering.

The elevator guide rail centering device of the above-described embodiment is supported by the extension contact devices 331 and 332 and the holding devices 63a and 63b so as to be entirely releasable between the hoistway walls. It may be releasably supported on the hoistway wall by a supporting and fixing device having another structure such as a combination of a contacting device and a holding device, and the holding devices 45a and 45b for holding the guide members 4a and 4b and the holding device 45a,
The position adjusting devices 42, 481 and 482 for adjusting the position of the 45b in the X direction and the Y direction may have other configurations.

Further, the rear abutting portions 39a, 3a for drawing the rail members 4a, 4b into 41a, 410a, 41b, 410b serving as reference surfaces when gripping the rail members 4a, 4b.
Since the rail members 4a and 4b are arranged so as to face each other and be sandwiched in the vertical direction, the rail members 4a and 4b can be held while holding the verticality.

[0039]

As described above, the elevator guide rail centering device of the present invention is supported on the hoistway wall by the supporting and fixing device provided on the base member, and is guided to this base member via the position adjusting device. Since the gripping device for gripping the member is provided, it is not necessary to temporarily fix the guide member to support the whole as in the conventional case, and it is not necessary to perform position adjustment work with a hammer or the like after the temporary fixing. It is possible to perform accurate centering in a short time by displacing the guide member while operating the position adjusting device with respect to the base member supported on the hoistway wall, without being influenced by.

Since the reference surfaces are provided on the upper and lower portions of the moving piece, the rail member can be gripped in a wide range in the longitudinal direction, and the accuracy of verticality can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a guide rail centering device for an elevator according to an embodiment of the present invention.

2 is a plan view showing a state in which the centering device for the guide rails of the elevator shown in FIG. 1 is arranged on a work floor.

3 is a plan view showing a mounted state of the centering device for the guide rails of the elevator shown in FIG. 1. FIG.

4 is a plan view showing another mounting state of the centering device for the guide rails of the elevator shown in FIG. 1. FIG.

5 is a plan view showing a completed installation state of the centering device for the guide rails of the elevator shown in FIG. 1. FIG.

6 is a plan view of a centering device for the guide rails of the elevator shown in FIG.

FIG. 7 is an enlarged plan view of a main part of the centering device for the guide rails of the elevator shown in FIG.

FIG. 8 is an enlarged plan view of a main part of the centering device for the guide rail of the elevator shown in FIG.

9 is an enlarged perspective view of a portion A of the elevator guide rail centering device shown in FIG. 1. FIG.

FIG. 10 is a cross-sectional view of the positional relationship between the moving piece and the fixed piece of the elevator guide rail centering device according to the embodiment of the present invention.

FIG. 11 is a cross-sectional view of a hoistway at the time of centering a guide rail of a conventional elevator.

FIG. 12 is a flowchart showing a procedure of centering work for a conventional elevator guide rail.

FIG. 13 is a perspective view showing an enlarged main part of the hoistway shown in FIG.

FIG. 14 is a plan view of a conventional centering device for a guide rail of an elevator.

[Explanation of symbols]

 1a, 1b Piano wire 3 Hoistway 3a, 3b Hoistway wall 4a, 4b Rail member 31a, 31b Abutment body 33a, 33b Extending member 42 First position adjusting device 44a, 44b Pulling clamp 45a, 45b Grasping device 63a, 63b Holding device 331, 332 Extension contact device 481, 482 Second position adjusting device 39a, 39b Back contact part 41a, 410a, 41b, 410b Reference surface 411, 412 Reference member

Claims (1)

[Claims] 1. An elevator guide rail centering device for centering a rail member at a predetermined position in a hoistway with a piano wire hanging down in the hoistway as a reference, which extends to come into contact with a hoistway wall to form a base member. An extension contacting device for removably fixing the space between the hoistway walls, a first position adjusting device supported by the base member and capable of adjusting the position in the extension direction of the extension contacting device, and supported by the base member. A second position adjusting device capable of position adjustment in a direction orthogonal to the extension direction of the extension abutting device, and supported by the base member via the first and second position adjusting devices. A gripping device having a moving piece that comes into contact with the back surface of the rail member and retracts, and a fixed piece that faces the moving piece and is located above and below the moving piece. Moving piece and the solid A guide rail centering device for an elevator, comprising a reference member capable of gripping the rail member between the fixed piece and the fixed piece.