JP2016008617A - Processing method for conveying structure and guide rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carrier structure that can be applied to a guide rail capable of reversing an object to be transferred between the short distances and a processing method for a guide rail for its manufacture of the guide rail.SOLUTION: Three bearings 14, 15 and 16 are attached to the lower surface side of a carriage plate 12 capable of mounting an object to be transferred. More practically, a pair of first bearings 14, 15 are arranged in such a way that they can be rotated while being contacted with one surface of a linear guide rail 20 and the second one bearing 16 is arranged to be rotatable while sandwiching the linear guide rail 20 with respect to the pair of first bearings 14, 15 and being contacted with the other surface of the linear guide rail 20. The linear guide rail 20 is formed into a twisted shape.

Description

  The present invention relates to a transport structure capable of mounting an object to be transported and stably moving on a twisted guide rail, and a guide rail processing method for manufacturing the twisted guide rail. Are suitable for sequentially transporting workpieces such as work-in-process, intermediate products, and finished products between the processes.

  It has been common in the factory to process products in order to make finished products, but there are many cases in which it is necessary to sequentially carry in-process products, intermediate products, finished products, etc. between each process. For this reason, various conveying means such as a conveyor for connecting them have been used. For example, a driving system of a HEPCO track system is known, and there are several types of driving systems such as a belt driving system, a feed screw driving system, and a disk driving system.

  Among these, especially with regard to the feed screw drive system, a carriage that is a base material of the same size with respect to a guide rail for conveyance such as a circular shape, an elliptical shape, and a track shape that connects two semicircular shapes with a straight line Plates are continuously arranged and processed while being transported with work pieces such as work-in-process and intermediate products on the carriage plate. And finished product.

In the case of this conveyance, the necessity to test | inspect not only the surface side of a to-be-conveyed object but the back side may arise from the necessity to test | inspect a to-be-conveyed object from various aspects. For this reason, even when two cameras are arranged next to each other or inspected by an inspector, it is convenient if the object to be conveyed can be reversed within a short distance. On the other hand, it is necessary to discharge, for example, a solution required for the conveyed object from the guide rail after the filling process. At this time, it is convenient if the conveyed object can be reversed and discharged by its own weight.
On the other hand, the following Patent Documents 1 to 3 each disclose a technique in which an object to be conveyed moves on a guide rail.

Japanese Utility Model Publication No. 5-96547 JP 2001-263348 A JP 2010-255725 A

However, none of the techniques disclosed in any of the patent documents exist that can reverse the conveyed object at a short distance when the conveyed object moves on the guide rail.
SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and a transport structure that can be applied to a guide rail that can reverse a transported object within a short distance, and a guide rail processing method for manufacturing such a guide rail. The purpose is to provide.

The invention according to claim 1, which has solved the above problem, is a pair of first bearings that can rotate in contact with a twisted guide rail;
A second bearing that can rotate in contact with the guide rail while sandwiching the guide rail between the pair of first bearings;
A base material on which the pair of first bearings and one second bearing are mounted, and on which an object to be conveyed can be mounted,
It is a conveyance structure containing.

  According to the transport structure of the first aspect, the pair of first bearings and one second bearing are respectively attached to the base material on which the object to be transported can be mounted. However, the guide rail has a twisted shape, and the pair of first bearing and one second bearing are in contact with the guide rail and face each other while sandwiching the twisted guide rail. It is attached to the material.

  Therefore, according to the transport structure of the present invention, the guide rail has a twisted shape, so that the base material and the object to be transported mounted on the base material are transported while turning. On the other hand, it is conceivable to arrange the guide rail between four normal two bearings in total. However, in this case, if the guide rail and the bearing are engaged with each other or the clearance between the guide rail and the bearing is increased due to the relationship with the guide rail that is twisted and changes three-dimensionally (three-dimensionally). As a result, rattling occurs, making it difficult to stably transport the base material.

  For this reason, in order to be able to cope with the twist of the guide rail, in this claim, the guide rail is sandwiched between a total of three bearings, that is, a pair of first bearings and one second bearing. As a result, even if the guide rail is twisted, the base material can be stably moved, and even if it is necessary to reverse the object to be conveyed at a short distance, it can be reversed while being reliably conveyed.

  According to the second aspect of the present invention, V-shaped convex portions are formed on both sides of the guide rail in the width direction, and the V-shaped concave portion into which the convex portions are fitted has a pair of first bearing and one second bearing, respectively. The transport structure according to claim 1. That is, according to this claim, since the V-shaped convex portion is fitted into the V-shaped concave portion of each bearing, the base material can be conveyed more stably even when the guide rail is twisted. It becomes possible.

  According to a third aspect of the present invention, a guide member is disposed on the outer surface of the base material on the side to which the pair of first bearings are attached, and a conveying force from an external drive source is transmitted to the base material via the guide member. It is a conveyance structure of Claim 1 or 2. In other words, if the conveying force is transmitted to the base material on the side where the second bearing is present, the conveyance may become unstable because there is only one bearing, but according to this claim, the pair of first bearings Since the base material is pulled on the side where the material exists, the base material can be transported more stably.

The invention according to claim 4 is to form a guide rail material having V-shaped convex portions at both ends in the width direction, while making the dimension in the transport direction longer than the width dimension and the thickness dimension.
Furthermore, this guide rail material is hardened,
After quenching treatment, the V-shaped convex part is polished to make the guide rail material a guide rail,
Next, there is a guide rail processing method in which the guide rail can be twisted around the conveying direction in the quenching state to obtain a twisted guide rail.

  According to the guide rail processing method of the fourth aspect, the V-shaped convex portions are formed at both ends in the width direction of the guide rail material in which the dimension in the conveyance direction is longer than the width dimension and the thickness dimension, and then the firing is performed. Process. After this quenching treatment, the V-shaped convex portions at both ends in the width direction of this guide rail material are polished to form guide rails, and then the guide rails are twisted around the conveying direction in the quenching treatment state. To do.

  As a result, by twisting the guide rail after quenching and polishing, it is not necessary to quench or polish after twisting, and a twisted guide rail can be easily obtained. Accordingly, even when it is necessary to reverse the object to be conveyed at a short distance, by using this guide rail, the object to be conveyed can be reliably reversed while being conveyed on the guide rail.

  The invention according to claim 5 is the guide rail processing method according to claim 4, wherein the quenching treatment of the guide rail material is induction hardening. In other words, induction hardening is a method of heat treatment in which electromagnetic induction by high frequency electromagnetic waves is caused to metal and the metal surface is overheated and hardened, but only the metal surface is hardened to increase the hardness, Can maintain toughness. For this reason, by adopting this induction hardening, it becomes easy to twist the guide rail after this hardening.

  The invention according to claim 6 is the guide rail processing method according to claim 4 or 5, wherein the hardness of the V-shaped convex portion is quenched to HRC58-60 during the quenching treatment of the guide rail material. . In other words, the V-shaped convex portion is hardened so that the hardness is the highest HRC60, which not only makes it easy to twist the guide rail after the hardening treatment, but also the hardness is the lowest HRC58. By performing the quenching process as described above, it was possible to obtain a hardness that can maintain the wear resistance of the portion that is inherently easily worn. Accordingly, the hardness of the V-shaped convex portion needs to be in the range of HRC58-60.

  According to the present invention, it is possible to provide a transport structure that can be applied to a guide rail capable of reversing an object to be transported over a short distance, and a guide rail processing method for manufacturing such a guide rail. There is an effect.

It is a perspective view of a conveyance system to which an embodiment of the present invention is applied. It is a side view of the conveyance structure concerning one embodiment of the present invention. It is a top view of the conveyance structure which concerns on one embodiment of this invention. It is the perspective view seen from the bottom showing the conveyance structure on the straight guide rail which concerns on one embodiment of this invention. It is explanatory drawing showing conveyance of the conveyance structure on the linear guide rail which concerns on one embodiment of this invention. It is a perspective view which expands and shows the drive part of the conveyance system with which one embodiment of this invention is applied. It is a perspective view of the linear guide rail with which one embodiment of the present invention is applied. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure showing the linear guide rail with which one embodiment of this invention is applied, (A) is sectional drawing, (B) is a top view. It is explanatory drawing showing the processing method of the linear guide rail which concerns on one embodiment of this invention.

An embodiment in which a method for processing a transport structure and a guide rail according to the present invention is applied to a transport system will be described below with reference to the drawings.
As shown in FIGS. 1 to 5, a carriage plate 12, which is a base material made of metal and formed in a substantially square shape, constitutes the main body portion of the transport structure 10 according to the present embodiment. Three bearings 14, 15, 16 that can rotate smoothly in the arrangement of isosceles triangles on the lower surface side of the carriage plate 12 on which an object can be mounted are attached by screwing by fastening nuts 18. .

  Specifically, as shown in FIG. 4, the pair of first bearings 14 and 15 are arranged so as to be able to rotate while being in contact with one surface side of the guide rails 20 and 21. In addition, one second bearing 16 is arranged so as to be able to rotate in contact with the other surface side of the guide rails 20 and 21 while sandwiching the guide rails 20 and 21 with respect to the pair of first bearings 14 and 15. . However, in the present embodiment, the second bearing 16 constitutes the apex of an isosceles triangle.

  Therefore, the guide rails 20 and 21 (only the guide rail 20 is shown in the figure) are arranged so as to pass through the central portions of the bearings 14, 15 and 16 which are the three roller-shaped guides in the left and right directions of FIGS. In this embodiment, the carriage plate 12 can move on the guide rails 20 and 21 while the guide rails 20 and 21 are sandwiched between these three bearings 14, 15 and 16. These guide rails 20 and 21 are composed of a linear guide rail 20 extending in a straight line and a semicircular guide rail 21 extending in a rotating manner by a half circumference.

  4, 7, and 8, V-shaped convex portions 22 are provided at both ends in the width direction of the guide rails 20, 21, so that they protrude in a mountain shape on both sides in the width direction. These guide rails 20 and 21 are also formed in a hexagonal cross-sectional shape having a sliding portion. Correspondingly, a V-shaped concave portion 17 into which the convex portion 22 is fitted is provided in the middle in the vertical direction of the three bearings 14, 15, 16 so that the bearing 14 can be easily moved from the guide rails 20, 21. Is not to come off.

  In the transport system 40 shown in FIG. 1 of the present embodiment, the above-described linear guide rails 20 that are two linear portions positioned above and below, and between the ends of the linear guide rails 20 that are respectively disposed on both sides thereof. The guide rails 20 and 21 have the above-described semicircular guide rails 21 that are two semicircular portions that connect the two. In the transport system 40, the linear guide rail 20 and the semicircular guide rail 21 are connected in an annular shape up and down.

  However, as shown in FIGS. 1 and 5, the two linear guide rails 20 are formed in a twisted shape, and the two linear guide rails 20 have a relationship of 180 ° rotation between both ends in the conveying direction H. ing. For this reason, the carriage plate 12 entering the upper linear guide rail 20 facing upward from one end side exits facing downward on the other end side. Then, by turning again with the lower straight guide rail 20, the carriage plate 12 similarly enters the one end side of the upper straight guide rail 20 facing upward.

  The conveyance system 40 shown in FIGS. 1 and 6 of the present embodiment has not only the linear guide rail 20 and the semicircular guide rail 21 fixed to a support frame 24 that is a frame of a housing, but also a drive source. A motor 26 is also attached. Further, a power transmission member 28 that is cylindrical and has a guide groove 28 </ b> A formed in a spiral shape is rotatably arranged in a positional relationship parallel to the lower straight guide rail 20. Accordingly, a timing belt 27 is wound between the motor 26 and the power transmission member 28, and the driving rotation of the motor 26 is transmitted to the power transmission member 28 via the timing belt 27. The transmission member 28 rotates.

  As shown in FIGS. 2 and 3, a guide member 30 that is a roller-shaped guide is disposed on the outer surface 12A of the carriage plate 12 on the side where the pair of first bearings 14 and 15 are attached. Since the guide member 30 is engaged with the guide groove 28A of the power transmission member 28, the conveyance force is transmitted to the carriage plate 12 through the guide member 30 as the power transmission member 28 rotates. Yes. Further, at the front and rear ends of the carriage plate 12 in the conveying direction, one end of a connection arm 32 for connection is supported rotatably around a support shaft 31 fixed to the carriage plate 12. By connecting the carriage plates 12, the plurality of carriage plates 12 are transported in conjunction with each other. However, the shaft member 32 </ b> A on which the male screw forming the connection arm 32 is actually divided into two, and these shaft members 32 </ b> A are connected by the adjusting nut 34.

Next, a guide rail processing method according to the present embodiment will be described below.
First, a guide rail material 20A is produced by cutting or cutting a steel material such as bearing steel (high carbon chrome bearing steel). At this time, the conveyance direction dimension L is made longer than the width dimension D and the thickness dimension T as shown in FIG. 9, and V-shaped convex portions 22 are provided at both ends in the width direction. Then, a plurality of holes 23 for fixing to the support frame 24 of the transport system 40 are machined into the guide rail material 20A at equal intervals.

  Thereafter, the guide rail material 20A is subjected to induction hardening so that the sliding portion A of the V-shaped convex portion 22 shown in FIG. 8 has a hardness of about HRC58-60, which is Rockwell hardness. Quench processing. In order to maintain a very strong and stable state after performing bending correction processing such as press processing for correcting distortion and deformation caused by the quenching process, the guide rail material 20A A black dyeing process is performed to form an oxide film that is an iron oxide film on the surface.

  Next, after the convex portion polishing process for polishing the V-shaped convex portions 22 is performed on both sides in the width direction of the guide rail material to form the linear guide rail 20, the linear guide rail 20 is left in the quenched state. The straight guide rail 20 is twisted 180 ° around the conveying direction H while holding both ends with a jig or the like. As a result, the twisted linear guide rail 20 shown in FIGS. 7 to 9 is completed.

  In addition, by completing another straight guide rail 20 having a twisted shape in the same manner, two straight guide rails 20 are manufactured, and two semicircular guide rails 21 that have been manufactured separately are supported. The conveyance system 40 is completed by assembling the frame 24, the motor 26, and the like. Then, while connecting the plurality of transfer structures 10 by the connecting arm 32, the transfer structures 10 are installed by meshing the three bearings 14, 15, 16 with the linear guide rails 20 and the semicircular guide rails 21, respectively. A member capable of mounting a product or the like (not shown) to be transported is attached to the carriage plate 12 of each transport structure 10 as necessary. Further, an inspection camera and a control device (not shown) are attached to the support frame 24, and the transport system 40 is finally completed.

Next, the operation of the transport structure 10 according to the present embodiment will be described below.
According to the transport structure 10 according to the present embodiment, a pair of first bearings 14 and 15 and one second bearing 16 are attached to a carriage plate 12 on which a transported object can be mounted so as to rotate. Yes. However, the linear guide rail 20 has a twisted shape, and the pair of first bearings 14 and 15 and one second bearing 16 face each other with the twisted linear guide rail 20 interposed therebetween. The linear guide rail 20 comes into contact with the carriage plate 12.

  Further, V-shaped convex portions 22 are formed on both sides of the linear guide rail 20 in the width direction, and these three bearings 14, 15, 16 are respectively formed in the V-shaped concave portions 17 into which the convex portions 22 are fitted. Have. Furthermore, each carriage plate 12 is connected by a connecting arm 32 and is driven by a motor 26 via a guide member 30 disposed on the outer surface 12A of the carriage plate 12 on the side where the pair of first bearings 14 and 15 are attached. When the conveying force is transmitted to the carriage plate 12, the carriage plate 12 moves on the linear guide rail 20.

  Therefore, according to the transport structure 10 of the present embodiment, since the linear guide rail 20 has a twisted shape, the carriage plate 12 and the transported object mounted on the carriage plate 12 are transported while turning. Will be. On the other hand, when the linear guide rail 20 is arranged so as to be sandwiched between four ordinary two bearings in total, the relationship with the linear guide rail 20 having a structure that is twisted and changes three-dimensionally (three-dimensionally). Thus, it becomes difficult to stably convey the carriage plate 12. For this reason, in this embodiment, in order to be able to cope with the twist of the linear guide rail 20, the linear guide rail is composed of a total of three bearings 14, 15, 16 including a pair of first bearings 14, 15 and one second bearing 16. 20 was sandwiched. As a result, according to the present embodiment, the carriage plate 12 can be stably moved even if the linear guide rail 20 is twisted, and even if the object to be transported needs to be reversed over a short distance, it can be reliably conveyed. However, it can be reversed.

  At this time, a V-shaped convex portion 22 is provided on the linear guide rail 20, and a V-shaped concave portion 17 is provided on each of the three bearings 14, 15, 16, and the convex portion 22 is fitted into the concave portion 17. Therefore, even if the linear guide rail 20 is twisted, the carriage plate 12 can be transported more stably.

  Further, the conveying force by the motor 26 is transmitted to the carriage plate 12 through the guide member 30 disposed on the outer surface 12A of the carriage plate 12 on the side where the pair of first bearings 14 and 15 are attached. For this reason, since the carriage plate 12 is pulled on the side where the pair of first bearings 14 and 15 exists, this also enables more stable conveyance.

  In the above embodiment, the guide rails 20 and 21 are made of steel such as bearing steel, and the carriage plate 12 and the support frame 24 are made of metal. Or made of stainless steel, or other metal such as aluminum. Furthermore, in the above embodiment, the linear guide rail 20 is twisted at an angle of 180 degrees, but instead, it may be twisted at another angle such as an angle of 90 degrees. Further, the guide rail employs a combination of the straight guide rail 20 and the semicircular guide rail 21, but a guide rail formed in a curved shape may be combined instead of the semicircular guide rail 21. Power transmission from the motor as a drive source may be a chain or the like instead of the timing belt.

  The embodiments according to the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  The present invention can be applied not only to sequentially transfer a work to be transferred such as work-in-process, intermediate product, and finished product in each factory, but also to transfer in various applications.

10 Continuous transport structure 12 Carriage plate (base material)
14 1st bearing 15 1st bearing 16 2nd bearing 17 Concave part 20 Straight guide rail 20A Guide rail material 21 Semicircular guide rail 22 Convex part 26 Motor (drive source)
30 Guide member 40 Transport system

Claims (6)

A pair of first bearings capable of rotating in contact with a twisted guide rail;
A second bearing that can rotate in contact with the guide rail while sandwiching the guide rail between the pair of first bearings;
A base material on which the pair of first bearings and one second bearing are mounted, and on which an object to be conveyed can be mounted,
Conveying structure including   2. A pair of first bearing and one second bearing each have a V-shaped convex part formed on each side in the width direction of the guide rail, and a V-shaped concave part into which the convex part is fitted. Transport structure.   The guide member is arrange | positioned on the outer surface of the base material near the side where a pair of 1st bearing was attached, The conveyance force by an external drive source is transmitted to a base material via this guide member. Transport structure. While making the dimension in the conveyance direction longer than the width dimension and the thickness dimension, forming a guide rail material having V-shaped convex portions at both ends in the width direction,
Furthermore, this guide rail material is hardened,
After quenching treatment, the V-shaped convex part is polished to make the guide rail material a guide rail,
Next, a guide rail processing method in which the guide rail can be twisted around the conveying direction in the quenching state to obtain a twisted guide rail.   The guide rail processing method according to claim 4, wherein the hardening treatment of the guide rail material is induction hardening.   The guide rail processing method according to claim 4 or 5, wherein the hardness of the V-shaped convex portion is quenched to HRC58-60 during the quenching treatment of the guide rail material.

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