JP2003266261A - Guide rail processing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain high precision linearity by cutting work to an end surface of a guide part by minimizing effects of weight of a guide rail or its fixation. <P>SOLUTION: A support member 8 to support the guide rail 2 at linear points is provided on a planar table 1. Support pins 9 that are elastically supported in vertical directions and natural clamps comprising electromagnets 7 are provided. The guide rail 2 is thus held and fixed by the support members 8 and the natural clamps to minimize flexure quantity by weight of the guide rail 2. In this state, the end surface of the guide part 2b of the guide rail 2 is cut. After it is released from fixation, restoration of deformation of the guide rail 2 is not to occur. Linearity of the end surface of the guide part 2b is thus maintained after cutting work. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of processing a guide rail for guiding up and down of a cab or a counterweight of an elevator.

[0002]

2. Description of the Related Art An elevator is guided by a guide rail attached to a hoistway when a car room or a counterweight is hoisted in the hoistway. When the elevator guide rail is manufactured by hot rolling, the material is generally bent in the longitudinal direction. In the bent state, the guiding cab or the counterweight moves up and down. At this time, a large vibration is generated, so that the end face of the guide portion with which the guide roller comes into contact is subjected to cutting processing such as milling grinding so as to have linearity.

When cutting the guide rail, the guide rail is held and fixed on the planar table. As the chucking structure at this time, a mechanical clamp structure by hydraulic pressure or the like, or a clamp structure by magnet attraction is generally adopted.

FIG. 6 is a perspective view showing a state where a guide rail is held and fixed by a mechanical clamp structure. The planar table 1 is provided with a plurality of conveyance rollers 3 arranged at intervals along the conveyance direction of the guide rail 2 and a plurality of L-shaped clamps 4 for holding and fixing the guide rail 2 on both sides. Each of them can be moved up and down by hydraulic pressure or the like.

When the guide rail 2 is transported by the transport roller 3 and reaches the position where it abuts the stopper 5 in the raised position, the transport roller 3 descends and is placed on the support member 1a of the planar table 1. Then, the clamps 4 arranged on both sides of the guide rail 2 in the width direction descend and hold down the base portion 2a of the guide rail 2 to hold and fix the guide rail 2.

FIG. 7 is a perspective view showing a state in which the guide rail is held and fixed by a clamp structure by magnet attraction. The planar table 1 is provided with a plurality of conveying rollers 6 arranged at intervals along the conveying direction of the guide rails 2 and capable of moving up and down by hydraulic pressure or the like, and an electromagnetic magnet is provided between the conveying rollers 6. 7 is provided. When the guide rail 2 is conveyed by a plurality of conveying rollers 6 and reaches a position where it abuts the stopper 5 in the raised position, the conveying roller 6 descends and is placed on the electromagnetic magnet 7, and the electromagnetic magnet 7 operates. Then, it is held and fixed by being adsorbed.

In the guide rail 2 held and fixed by these clamp structures, when the guide portion end surface 2b is cut, the gripping by the clamp 3 and the attraction by the electromagnetic magnet 7 are released, and the raised conveying roller 3 or It is carried out by 6.

FIGS. 8 (a) to 8 (d) are schematic process diagrams showing states of the guide rails in the main process when cutting the end face of the guide portion of the guide rail held and fixed by the above-mentioned conventional clamp structure. .

As shown in FIG. 8 (a), if the guide rail 2 before processing has poor linearity, the material shape is bent. Although it is bent in the shape of a mountain in the drawing, in many cases, it is actually bent in a wavy manner. From this state, Fig. 8 (b)
When the guide rail 2 is placed on the planar table 1 as shown in FIG. From this state, as shown in FIG. 8C, when it is forcibly fixed to the surface of the planar table 1 by the mechanical clamp structure or the magnet clamp structure, it is further deformed by α and is held and fixed in a state of being deformed by δ + α. It Even if the end surface of the guide portion 2b of the guide rail 2 is cut to have linearity in this state, when the holding and fixing of the guide rail 2 is released after processing, as shown in FIG. 8 (d). Since the deformation of δ + α tends to return to the original state, the end surface of the guide portion 2b cannot maintain its linearity and is bent.

Therefore, as shown in FIGS. 9 (a) to 9 (d), it is conceivable to hold and fix the guide rails by a natural clamp that does not damage the shape of the material. This holding and fixing is done on the guide rail 2
By a plurality of support pins elastically supported in the vertical direction,
The material is held and supported in its deformed state and is also attracted and fixed by an electromagnetic magnet so that the deformation of α when the guide rail is forcibly fixed is eliminated. In the case of this natural clamp as well, if the linearity of the material shape is poor, as shown in FIG. 9B, when it is placed on the planar table 1, it is deformed by δ due to its own weight. As shown in FIG. 9C in the state of being deformed by δ, when the work is held and fixed by a natural clamp and cutting is performed, the guide portion end surface 2b of the guide rail 2 is processed into a straight line in the state of being held and fixed. However, as shown in FIG. 9 (d), when the holding and fixing of the guide rail 2 is released and returned to a natural state,
Since the deformation of δ tends to return to the original state, the end surface of the guide portion 2b of the guide rail 2 also bends in this case because the linearity cannot be maintained.

[0011]

As described above, in the conventional holding and fixing of the guide rail 2 during cutting, the holding force can be sufficiently maintained and the guide rail 2 can be cut linearly according to the machine accuracy, but on the planar table 1. If the linearity of the material to be placed on is poor, there is a problem that the linearity of the product deteriorates after releasing the holding and fixing after cutting.

The present invention has been made in consideration of the above-mentioned problems, and it is possible to minimize the influence of the weight of the guide rail or the holding and fixing of the guide rail, and to maintain a highly accurate linearity by cutting. An object of the present invention is to provide a rail processing method.

[0013]

According to a first aspect of the present invention, there is provided a method of processing a guide rail end face of a guide rail held and fixed on a planar table, wherein the guide rail has a minimum bending amount due to its own weight. The end face of the guide portion of the guide rail is machined by holding and fixing in this state.

[0014] The invention described in claim 2 is the invention according to claim 1, the bending moment of the fulcrum here When ^{Ms Ms = -w (L-d} ) 2/8 of the guide rail, w: It is characterized in that the guide rail is supported at a nearer point determined by L: longitudinal length of the guide rail 2, d: span, and evenly distributed load per unit length.

It is characterized in that the guide rail is supported at a near-point and is held and fixed by a natural clamp.

According to a third aspect of the present invention, in the invention according to the second aspect, the natural clamp is provided with a plurality of support members for elastically supporting the guide rail in the vertical direction and a gap between the guide rail and the guide member. It is characterized in that it is configured by an electromagnetic magnet that is attracted by a magnetic field.

According to a fourth aspect of the invention, in the second aspect of the invention, the material shape data of the guide rail is fed back to the operation amount of the natural clamp.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. 1 (a) and 1 (b) are a schematic front view and a side view showing a method of processing a guide rail according to an embodiment of the present invention.

In the present embodiment, the planar table 1
In addition, a support member 8 for supporting the guide rail 2 at a near-mentioned point, an electromagnetic magnet 7, and a plurality of support pins 9 are provided.
With the natural clamp consisting of, the guide rail 2 is held and fixed in a state in which the amount of flexure due to its own weight is minimized, and in this state, the end face of the guide portion 2b of the guide rail 2 is linearly cut by the cutting blade 10. is there. In addition,
Although not shown, the guide rail 2 is loaded and unloaded by a vertically moving transport roller.

The support member 8 for supporting the guide rail 2 at the nearer point is constructed to be movable in the vertical direction by hydraulic pressure or the like, and is located at the span d which is the nearer point with respect to the longitudinal dimension L of the guide rail 2. Will be placed.

FIG. 2 is a schematic view showing a state in which the guide rail 2 is supported at the near-point. The neary point can be obtained as follows. In FIG. 2, d that equalizes the bending moments of the center point and the fulcrum of the guide rail 2 is obtained. When a uniformly distributed load per unit length and w, bending moment Ms of ^{fulcrum, Ms = -w (L-d} ) 2/8 bending moment Mm of the middle ^{point, Mm = -wL 2/8 +} wLd / 4 Mm = Ms, d = 0 Mm = -Ms, and the span d is d = (2-√2) L = 0.586L In this way, the nearness point with respect to the guide rail 2 (in the case of a fixed length rail having a length of 5 m, the nearness is Point span d = 270
0 mm) and the support member 8 is installed. The guide rail 2 supported at the near-point has the least amount of deformation under its own weight, and by combining a natural clamp in this state, the guide rail having a high degree of linearity can be cut.

3 and 4 are a perspective view and a side view showing the natural clamp structure. A plurality of support pins 9 that support the guide rail 2 are arranged along the longitudinal direction of the guide rail 2. In this embodiment, a total of 24 pieces are arranged by arranging 2 pieces of 12 pieces arranged at intervals. These support pins 9 have a structure in which a pin body 9a is elastically supported in the vertical direction by springs 9b, and when the guide rail 2 is placed on the upper portion, the support pins 9 descend according to the material shape of the guide rail 2 to support the same. Then, when the guide rail 2 is carried out, it rises and returns to the original position.

The electromagnetic magnet 7 is arranged between the support pins 9. As shown in FIG. 4, the electromagnetic magnet 7 is adapted to be adsorbed and held by the guide rail 2 in a floating state with a gap g between the magnet surface 4a and the guide rail 2.

By combining the support by such a near-line point and the natural clamp, the guide rail 2 is supported while maintaining the deformed state of the material without setting the reference surface, and is also attracted by the electromagnetic magnet 7. It can be held and fixed.

FIGS. 5A to 5D are schematic process diagrams showing the state of the guide rails in the main processes of this embodiment. As shown in FIG. 5 (a), the material of the guide rail 2 before processing is bent if the linearity is poor. From this state, as shown in FIG. When placed on the support member 8, the guide rail 2 is supported by its own weight with almost no deformation. From this state, as shown in FIG. 5 (c), the guide rail 2 is held and fixed in a floating state by a natural clamp including a support pin 9 and the like, and the end face of the guide portion 2b of the guide rail 2 is cut by a cutting blade 10. To have linearity. When the holding and fixing of the guide rail 2 is released after cutting, the deformed shape of the material is maintained and the linearity of the end surface of the guide portion 2b is maintained, as shown in FIG. 5 (d).

In this way, the guide rail 2 is held and fixed in a state in which the amount of flexure due to its own weight is minimized, and one-side processing is performed in which the end face of the guide portion 2b of the guide rail 2 is linearly cut without setting the reference surface. Therefore, since the guide rail 2 is held and fixed without being deformed by its own weight, the linearity of the end surface of the guide portion 2b of the guide rail 2 should be maintained even if the holding and fixing is released after cutting into a highly accurate straight line. You can

In this case, the material shape data of the guide rail 2 is fed back to the operation amount of the natural clamp,
By increasing / decreasing the attraction strength of the electromagnetic magnet 7 and the number of operating support pins 9, it is possible to carry out a high degree of holding and fixing according to the shape of the material and improve the processing accuracy of the guide rail 2.

[0028]

As described above, according to the method of processing a guide rail of the present invention, the guide rail is held and fixed in a state in which the amount of deflection due to its own weight is minimized, and the end face of the guide portion of the guide rail is cut. As a result, it is possible to maintain highly accurate linearity due to the cutting process.

[Brief description of drawings]

1A and 1B are a schematic front view and a side view showing a method of processing a guide rail according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a state in which a guide rail is supported at a nearly point.

FIG. 3 is a perspective view showing a natural clamp structure.

FIG. 4 is a side view showing a natural clamp structure.

5A to 5D are schematic process diagrams showing the state of the guide rail in the main process of the present embodiment.

FIG. 6 is a perspective view showing a state in which a guide rail is held and fixed by a mechanical clamp structure.

FIG. 7 is a perspective view showing a state in which a guide rail is held and fixed by a clamp structure by magnet attraction.

FIG. 8A to FIG. 8D are schematic process diagrams showing states of the guide rails in a main process when the end face of the guide portion of the guide rail held and fixed by the conventional clamp structure is cut.

9 (a) to 9 (d) are schematic process diagrams showing states of the guide rails in main steps when cutting the guide portion end face of the guide rail held and fixed by the natural clamp structure.

[Explanation of symbols]

1 ... planar table 2 ... Guide rail 2a ... base 2b ... Guide section 3, 6 ... Conveyor rollers 4 ... Clamp 5 ... Stopper 7 ... Electromagnetic magnet 8 ... Support member 9 ... Support pin 10 ... Cutting blade

Claims (4)

[Claims] 1. A method of processing a guide rail for processing an end face of a guide portion of a guide rail held and fixed on a planar table, wherein the guide rail is held and fixed in a state in which a bending amount due to its own weight is minimized. A method of processing a guide rail, characterized in that the end face of the guide portion is processed. Here wherein said When the bending moment of the fulcrum of the guide rail and ^{Ms Ms = -w (L-d} ) 2/8, w: uniformly distributed load per unit length, L: guide longitudinal rails 2 The method of processing a guide rail according to claim 1, wherein the guide rail is supported at a nearly point determined by the dimension, d: span, and held and fixed by a natural clamp. 3. The natural clamp is composed of a plurality of support members that elastically support the guide rail in the vertical direction, and an electromagnetic magnet that attracts the guide rail via a gap. Claim 2
Guide rail processing method described in. 4. The method of processing a guide rail according to claim 2, wherein material shape data of the guide rail is fed back to an operation amount of the natural clamp.