JPH043788A - Manufacture of guide rail for elevator and manufacturing device - Google Patents

Abstract

PURPOSE:To obtain a guide rail with sufficient strength and improve productivity by guiding a raw material manufactured by hot rolling with a guiding tool, performing cold extrusion, detecting the bending of the guide rail, and extruding the guide rail with an adjusting tool. CONSTITUTION:When a raw material 1 manufactured by hot rolling is mounted on a carry-in device 9, the raw material 1 is carried into a cold extruding device 10 it is pushed into an extruding die 5 while being guided by upper and lower guide rolls 6a and right and left guide rolls 6b, and the raw material 1 is molded into a guide rail 4. The bending of the guide rail 4 is corrected by upper and lower adjustment rolls 6a and right and left adjustment rolls 7b at the outlet side of the extruding die 5, and it is guided into a correcting device 11 to obtain high straightness. It is then guided into a cutting device 12 to be cut to about 5m. It is guided into an end face machining device 13, fitting holes 4a and end section notches 4g are provided by press machining, and a guide projection 4c and a guide groove (not shown in the figure) to be coupled with the guide projection 4c are provided by milling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for manufacturing guide rails for elevators.

[Conventional technology]

As a conventional guide rail for elevators, JP-A-56
There are those shown in Japanese Patent Application Laid-open No. 145084 and Japanese Patent Application Laid-Open No. 116647/1983.

Conventionally, in order to manufacture an elevator guide rail as shown in FIG. 6, it is formed using a roll, cut into a length of about 5 m, and then provided with holes 2a for mounting.

In this method of manufacturing guide rails for elevators,
The forming speed by the rolls is about 30 m/min,
Processing speed is fast.

Conventionally, in order to manufacture an elevator guide rail as shown in FIG. After planarizing the bottom surface 3e and the guide portion 3b, providing a step 3f on the bottom surface 3e by milling, and providing a guide protrusion 3c or a guide groove (not shown) to engage with the guide protrusion 3c on the end surface, Mounting hole 3
A is provided.

In this method of manufacturing guide rails for elevators,
Since the guide portion 3b of the guide rail 3 has a solid cross-sectional shape, the guide rail 3 has sufficient strength against the lateral force P generated during an emergency stop of the elevator.

[Problems to be Solved by the Invention] However, in the method of manufacturing an elevator guide rail as shown in FIG.
Since b has a hollow structure, the guide rail 2 has a lateral force P
The strength against is small.

Further, in the method of manufacturing a kite rail for an elevator as shown in FIG. 7, it is necessary to perform planar processing, and the processing speed of planar processing is slow, resulting in poor productivity.

This invention was made to solve the above-mentioned problems, and includes a method for manufacturing an elevator guide rail that can obtain a guide rail with sufficient strength and excellent productivity, and a method for implementing the manufacturing method. The purpose is to provide manufacturing equipment.

[Means for Solving the Problems] In order to achieve this object, in the present invention, a material produced by hot rolling is subjected to cold extrusion processing.

In this case, the above-mentioned cold extrusion processing is performed while the above-mentioned material is guided by a guide tool, and after the above-mentioned cold extrusion processing is performed, the above-mentioned guide rail is pressed with an adjustment tool while detecting the bending of the guide rail. is preferred.

At this time, it is preferable to use a guide roll as the guide tool and to use an adjustment roll as the adjustment tool.

Further, it is preferable to perform the cold extrusion process and provide an end notch at the end of the guide rail by punching, and then provide a guide protrusion and a guide groove at the end of the guide rail.

Furthermore, in this invention, a cold extrusion device and a carry-in device for carrying the material into the cold extrusion device are provided.

In this case, a guide for guiding the material is provided on the inlet side of the extrusion die of the cold extrusion device, and a bending detector for detecting bending of the material and adjusting the bending of the material are provided on the exit side of the extrusion die. Preferably, an adjustment device is provided.

[Effect]

In the second method and apparatus for manufacturing an elevator guide rail, the cross-sectional shape of the guide portion of the guide rail has a solid structure, and the dimensional accuracy of the guide rail is high, so there is no need for cutting with a planar processing machine.

In addition, cold extrusion is performed while the material is guided by a guide tool, and after cold extrusion, the bending of the guide rail is detected and the guide rail is pressed by an adjustment tool, or cold extrusion is performed while the material is being guided by a guide tool. If a guide tool to guide the material is installed on the inlet side of the extrusion die of the device, and a bend detector to detect the bending of the material and an adjustment tool to adjust the bending of the material are installed at the outlet side of the pressing die, the seat of the material can be adjusted. It is possible to prevent the guide rail from bending and to correct the bending of the guide rail.

Furthermore, if a guide protrusion and a guide groove are provided at the end of the guide rail after performing cold extrusion processing and forming an end notch at the end of the guide rail by punching, the guide protrusion and guide groove can be provided at the end of the guide rail.
The amount of cutting required for providing the guide groove is reduced.

[Example] Fig. 1 shows an elevator guide rail manufacturing apparatus according to the present invention, and Figs. 2 and 3 each show a part of the elevator guide rail manufacturing apparatus shown in Fig. 1. It is a diagram. In the figure, 9 is a loading device, 10 is a cold extrusion device, 5 is an extrusion die of the cold extrusion device 10, and 6a
6b is a vertical guide roll provided on the entrance side of the extrusion die 5, and 6b is a left and right guide roll provided on the entrance side of the extrusion die 5. A plurality of sets of the vertical guide roll 6a and left and right guide rolls 6b are provided. And the upper and lower guide rolls 6a,
The distance between the left and right guide rolls 6b is determined by the cross-sectional shape of the material 1, particularly the moment of inertia of the material. For example, 8
In the case of kilorail (weight per 1m length is 8 KgfO guide rail), the interval between the upper and lower guide rolls 6a is set to 1.
．． The distance may be 3 m or less, and the distance between the left and right guide rolls 6b may be 1.4 m or less. 7a is extrusion die 5
7b is a horizontal adjustment roll provided on the exit side of the extrusion die 5; 8 is a bending detector for detecting the amount of bending of the guide rail 4; The positions of the vertical adjustment roll 7a and the left and right adjustment rolls 7b are controlled. 11 is a correction device,
As the straightening device 11, a roller leveler, a press straightening machine, or a combination of both is used. 12 is a cutting device, 13 is an end face processing device, 14 is a carry-out device, and 15 is a stocker.

Next, the operation of this elevator guide rail manufacturing apparatus, that is, the elevator guide rail manufacturing method according to the present invention will be described. First, when the material 1 manufactured by hot rolling is placed on the carry-in device 9, the material 1 is carried into the cold extrusion device 10, and is pushed into the extrusion die 5 while being guided by the upper and lower guide rolls 6a and the left and right guide rolls 6b. Then, the material 1 is formed into the guide rail 4. Next, on the exit side of the extrusion die 5, a vertical adjustment roll 7a
, the bending of the guide rail 4 is corrected by the left and right adjustment rolls 7b. Next, the guide rail 4 is connected to the orthodontic device 1
1, and the straightness of the guide rail 4 becomes high. Next, the guide rail 4 is introduced into the cutting device 12, and the guide rail 4 is cut into approximately 5 m. Next, the guide rail 4 is introduced into the end face processing device 13, and after the mounting holes 4a and the end notches 4g are formed by press working, the guide grooves (to be engaged with the guide protrusions 4C1 and 4c) are milled by milling. (not shown) is provided.

Next, the guide rail 4 is placed on the stocker 15 by the unloading device 14.

In this method and apparatus for manufacturing an elevator guide rail, the guide portion 4b of the guide rail 4 has a solid cross-sectional shape, so the guide rail 4 has sufficient strength against the lateral force P.

Further, since the guide rail 4 is formed by cold extrusion processing by the cold extrusion device 10, the upper surface 4d, the bottom surface 40
Because the dimensional accuracy of the dimension between them, that is, the height dimension, and the dimension between the guide parts 4b, that is, the width dimension, is high, the top surface 4d and the bottom surface 4
There is no need to cut the e and guide portions 4b with a planar processing machine, and the processing speed of cold extrusion processing is 5 to 10 times the processing speed of planar processing. In extrusion processing, no chips are generated, so the yield of the material is greatly improved. Furthermore, since the material 1 is pushed into the extrusion die 5 while being guided by the upper and lower guide rolls 6a and the left and right guide rolls 6b, it is possible to prevent the material 1 from buckling, so that the guide rail 4 can be manufactured reliably. can do.

Moreover, since the bending of the guide rail 4 can be corrected by the bending detector 8, the vertical adjustment roll 7a, and the horizontal adjustment roll 7b, it is possible to manufacture a guide rail 4 of good quality. Furthermore, after providing an end notch 4g by pressing, a guide protrusion 4c is formed by milling.
Since the guide groove is provided, the amount of cutting by milling becomes small, so that milling can be carried out in a short time. In addition, Figure 5 shows the area reduction rate R during cold extrusion processing.
It is a graph showing the relationship between and tensile strength σB.

As is clear from this graph, as the area reduction rate R increases, the tensile strength σB increases. For example, the tensile strength σB of material 1, that is, the tensile strength σB when the area reduction rate R is 0%, is 440 MPa, whereas the tensile strength σB when the area reduction rate R is 0% is 500 MPa. rise to Therefore, the strength of the guide rail 4 is greater when the guide rail 4 is formed by cold extrusion than when it is formed by planar processing.

In the above-mentioned embodiment, the vertical guide roll 6a and the left and right guide rolls 6b were used as the guide tools, and the vertical adjustment roll 7a and the left and right adjustment rolls 7b were used as the adjustment tools, but other guide tools and adjustment tools could be used. May be used.

〔Effect of the invention〕

As explained above, in the method and apparatus for manufacturing an elevator guide rail according to the present invention, since the cross-sectional shape of the guide portion of the guide rail has a solid structure, it is possible to obtain a guide rail with sufficient strength. Also, since there is no need for cutting with a planar processing machine, productivity is excellent.

In addition, cold extrusion processing is performed while guiding the material with a guide tool, and after cold extrusion processing, the guide rail is pressed with an adjustment tool while detecting the bending of the guide rail, or the cold extrusion device By installing a guide to guide the material on the inlet side of the extrusion die, and providing a bending detector to detect the bending of the material and an adjustment tool to adjust the bending of the material on the exit side of the extrusion die, buckling of the material can be prevented. Since this can be prevented, kite rails can be manufactured reliably, and since bends in the guide rail can be corrected, high-quality guide rails can be manufactured.

Furthermore, if a guide protrusion and a guide groove are provided at the end of the guide rail after performing cold extrusion processing and forming an end notch at the end of the guide rail by punching, the guide protrusion and guide groove can be provided at the end of the guide rail.
Since the amount of cutting required for providing the guide groove is reduced, the cutting can be performed in a short time.

As described above, the effects of this invention are remarkable.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an elevator guide rail manufacturing apparatus according to the present invention, FIGS. 2 and 3 are views showing a part of the elevator guide rail manufacturing apparatus shown in FIG. 1, and FIG. The figure is a perspective view showing a part of a guide rail manufactured by the elevator guide rail manufacturing apparatus shown in Figure 1, and Figure 5 shows the relationship between the area reduction rate R and tensile strength σB during cold extrusion. Graphs showing the relationship, and FIGS. 6 and 7 are perspective views showing conventional elevator guide rails, respectively. 1... Material 4... Guide rail 4c... Guide projection 4g... End notch 5... Extrusion die 6a... Vertical guide roll 6b... Left and right guide roll 7a... Vertical adjustment Roll 7b...Left and right adjustment roll 8...Bending detector 9...Carrying device 1o...Cold extrusion device

Claims (1)

[Claims] 1. A method for manufacturing an elevator guide rail, which comprises cold extruding a material manufactured by hot rolling. 2. Performing the cold extrusion while guiding the material with a guide tool, and after performing the cold extrusion, pressing the guide rail with an adjustment tool while detecting bending of the guide rail. A method for manufacturing an elevator guide rail according to claim 1. 3. The method for manufacturing an elevator guide rail according to claim 2, wherein the guide tool is a guide roll, and the adjustment tool is an adjustment roll. 4. After performing the cold extrusion process and forming an end notch at the end of the guide rail by punching, a guide protrusion and a guide groove are provided at the end of the guide rail. A method for manufacturing an elevator guide rail according to item 1. 5. An elevator guide rail manufacturing device comprising a cold extrusion device and a loading device for loading a material into the cold extrusion device. 6. A guide for guiding the material is provided on the inlet side of the extrusion die of the cold extrusion device, and a bending detector for detecting the bending of the material and an adjustment for adjusting the bending of the material are provided on the exit side of the extrusion die. 6. The elevator guide rail manufacturing apparatus according to claim 5, further comprising a tool.