JP2019132368A - Roller device with free high load specification - Google Patents

Abstract

To provide an improved structural down-sized and simplified roller device in which a direction changing operation for a desired direction can be carried out within a space saving range even under a high load.SOLUTION: Radial bearings 4 are arranged in each of main bodies of rollers 2, 3 in which their large diameter sides are oppositely arranged while being spaced apart by a predetermined clearance in such a way that rollers 2, 3 can be rotated in respect to the radial bearings and also thrust bearings 5 adjacent to the radial bearings 4 are oppositely arranged in such a way that the rollers 2, 3 can be rotated in respect to the thrust bearings, each of these thrust bearings 5 is abutted against a core metal part 7 of a fixing bracket 6 and this is arranged at the predetermined clearance position. Both radial bearings 4 and the thrust bearings 5 are rotatably supported by a hollow cylindrical shaft fitted to the center of the core metal part 7 and further a connecting rod 9 is inserted and passed in the hollow cylindrical shaft so as to rotate the rollers 2, 3 integrally. In this case, a core metal supporting part 8 for the fixing bracket 6 is arranged at the core metal part 7 in such a way that the core metal supporting part 8 shows 45 degrees in respect to the hollow cylindrical shaft.SELECTED DRAWING: Figure 3

Description

  The present invention is a roller device used in place of a roller of a conveyor, a wheel of a carriage, etc. For example, by using a plurality of these roller devices arranged in an appropriate manner, the direction changing operation in the front-back, left-right, and diagonal directions can be freely performed The present invention relates to a roller device that can be used.

For example, there is a conventional structure of rollers arranged on the conveyor as shown in FIG. 12 (Non-Patent Document 1).
The conveyor 100 in FIG. 12 has a U-shaped configuration in a plan view, and is typically a product (not shown) that is manually loaded from, for example, the direction of the arrow A1, is U-turned, and is transported in the direction of the arrow B1. It is. The conveyor 100 has a plurality of straight rollers 101 whose outer shape forms a cylindrical shape at the straight portion of the conveyor 100, and a plurality of taper rollers whose outer shape forms a substantially truncated cone shape at the semicircular portion 100a. 102 are arranged at equal intervals, and in this example, the conveyor 100 is composed of rollers having different shapes of the straight roller 101 and the tapered roller 102.

  However, in the conveyor 100 of the type described above, the semi-circular portion 100a described above must be created on the conveyor itself so as to make U-turns when loading and unloading items. It is necessary to attach a tapered roller 102 having a different shape.

  Also, depending on the size of the product, the conveyor 100 of the type described above is generally large in size and unsuitable for installation in a small space. Has a problem that it cannot withstand the strength and the operation on the straight roller 101 and the taper roller 102 cannot be performed smoothly.

Central Conveyor Co., Ltd., product information, drive conveyor, taper curve MTR type, [searched on January 20, 2018], Internet <URL: http://www.centralcv.co.jp/products>

  The problem to be solved is that when used in a conveyor, a carriage, etc., for example, if the rollers are arranged while paying attention to the mounting position without being troubled by the shape of the conveyor, the direction in the desired direction even under high load The roller device is capable of changing operation in a space-saving range and is downsized and simplified in structure.

  Further, for example, when used for a carriage, by attaching rollers to a plurality of cored bar portions integrally formed on the wheel constituting the wheel, it is possible to provide a roller apparatus that is excellent in workability and reduces the manufacturing cost of the carriage. .

The high-load specification universal roller device according to claim 1 of the present invention is a mode in which the large-diameter surface side of the rollers face each other with a predetermined gap between a pair of rollers whose rolling surfaces are linear or drum-shaped tapered. And arranged so that it can rotate as a unit,
A radial bearing is disposed in the main body of the roller so that the roller is rotatable relative to a cylindrical roller of the radial bearing, and the large bearing of the main body adjacent to the position of the radial bearing is disposed. Thrust bearings are respectively disposed in the concave grooves opened on the radial side so that the rollers can rotate relative to the thrust bearings,
These thrust bearings are respectively brought into contact with both side surfaces of the metal core portion of the mounting bracket so that the metal core portion is disposed at the predetermined gap position, and the hollow cylindrical shaft fitted in the center of the metal core portion is connected to the hollow cylinder. Arranged so that the cylindrical roller of the radial bearing and the thrust bearing are rotatably supported by a shaft,
The metal core support part of the mounting bracket is provided on the metal core part so that the metal core support part forms a predetermined angle with respect to the hollow cylindrical shaft. As long as the position of the roller device of the present application is installed and arranged appropriately, the direction change operation in the desired direction is not only possible in a space-saving range, but also the radial load applied to the roller during the direction change operation The bearings corresponding to the thrust load are arranged respectively. Especially, the radial roller bearings have a structure in which the cylindrical roller is rotatably supported by the hollow cylindrical shaft. The direction changing operation in a desired direction is possible even under a high load.

  In the high-load specifiable roller device according to claim 2 and claim 4 of the present invention, connecting rods that pass through the hollow cylindrical shaft and extend to the small-diameter side of the roller are arranged to integrate the rollers. In this way, a specific configuration for integrating a pair of rollers is shown.

The high-load specification universal roller device according to claim 3 of the present invention is a mode in which the large-diameter surface sides of the rollers face each other with a predetermined gap between a pair of rollers whose rolling surfaces are linear or drum-shaped tapered. And arranged so that it can rotate as a unit,
A radial bearing is disposed in the main body of the roller so that the roller is rotatable relative to a cylindrical roller of the radial bearing, and the large bearing of the main body adjacent to the position of the radial bearing is disposed. Thrust bearings are respectively disposed in the concave grooves opened on the radial side so that the rollers can rotate relative to the thrust bearings,
The thrust bearings are respectively brought into contact with both side surfaces of the cored bar portion so that the cored bar portion is disposed at the predetermined gap position, and the hollow cylindrical shaft fitted in the center of the cored bar portion is Arranged so that the cylindrical roller of the radial bearing and the thrust bearing are rotatably supported,
The cored bar portion is erected integrally with the peripheral surface of the wheel, which is a predetermined regular rectangular body, and is provided so as to form a fixed angle with respect to the rotation axis of the wheel, so that workability is excellent. It is possible to provide a roller device that reduces the manufacturing cost of the carriage.

  According to claim 5 of the present invention, in the high-load specification adjustable roller device, the wheel which is a predetermined regular faceted body has seven cored bar portions standing on a regular heptagonal wheel, and each cored bar portion has a predetermined angle. A pair of rollers is attached.

  The high-load specification roller apparatus according to the present invention can be used for a conveyor, a carriage, or the like, for example, if the rollers are arranged while paying attention to the mounting position without being troubled by the shape of the conveyor. There is an advantage that the operation of changing the direction can be reduced in a space-saving range, and the structure can be reduced in size and simplified. Moreover, when using for a trolley | bogie, workability | operativity is excellent and the manufacturing cost of a trolley | bogie can be reduced by attaching a roller to the some metal core part integrally formed in the wheel which comprises a wheel.

It is a use condition figure of the high load specification universal roller device concerning a 1st embodiment of the present invention. It is an external appearance perspective view of a high load specification universal roller apparatus. It is a disassembled perspective view of a high load specification universal roller apparatus. It is sectional drawing of the roller of a high load specification universal roller apparatus. It is a perspective view of the attachment bracket of a high load specification universal roller apparatus. It is sectional drawing of the metal core part of a mounting bracket. It is a use condition figure of the high load specification universal roller apparatus concerning a 2nd embodiment of the present invention. It is a figure which shows the structure of the wheel which is the main components of the wheel which uses a high load specification universal roller apparatus. It is a figure which shows the state which inserted the hollow cylindrical shaft in the insertion hole of a metal core part. It is a figure explaining the attachment method of the roller to the metal core part of integral construction with a wheel. It is a figure which shows the state which attached the roller to the metal core part of integral construction with a wheel. It is explanatory drawing of the conventional conveyor.

(First embodiment)
About the case where the high-load specification universal roller apparatus which concerns on the 1st Embodiment of this invention is used for a conveyor, the usage is demonstrated with reference to FIGS.
As shown in FIG. 1 (A), the conveyor C in a form that forms the carry-in part C ₁ , the carry-out part C ₂ , and the connection part C ₃ with only a straight part, for example, manually supplies goods (not shown). carried from the direction of arrow a, but is intended for unloading in the direction of arrow B via connection C _3, 2 types of rollers instead of straight rollers 101 and the tapered roller 102, in the conventional conveyor 100 described above, i.e., roller If the apparatus 1a and the roller apparatus 1b are arranged in consideration of the mounting position on the conveyor C constituted by only a straight portion, as shown in FIG. 1A, the direction changing operation in a desired direction is a space saving range. Is possible. FIG. 1B is an enlarged perspective view of the roller device 1a shown in FIG.

By the way, the roller device 1a (referred to as the 45-degree tilt roller device on the left) and the roller device 1b (referred to as the 45-degree tilt roller device on the right) refer to the core metal support portion 8 in the mounting bracket 6 as described later. when allowed affixed to 7, or the concentric axis by insertion hole 8b ₁ provided in each of the flanges 8b of the core support part 8 is a component of 45 degrees to the left inclined to the hollow cylinder axis 7d of the core portion 7, Or it differs only in the point which makes 45 degree right inclination, and a substantial structure does not differ.

Therefore, before describing the operation on the conveyor C, the roller device 1a will be described with reference to FIGS.
As shown in FIG. 2, the roller device 1a has a large diameter surface 2a, 3a (FIG. 3, FIG. 3) of a pair of rollers 2, 3 whose rolling surfaces form a drum-shaped taper in this embodiment. 4 side) are arranged so as to face each other with a predetermined gap therebetween, and are arranged so as to be rotatable as a unit.

  In this manner, for example, the roller 2 (the same applies to the roller 3), the R groove 2b, the large-diameter groove 2c, and the small-diameter groove 2d are arranged in a stepped manner from the large-diameter surface 2a in the main body. An insertion hole 2e that is provided and communicates with the small-diameter concave groove 2d is provided in such a manner as to communicate with the small-diameter hole 2g on the small-diameter surface 2f side (see FIG. 4). As shown in FIG. 3, in this embodiment, the outer race 4a of the radial bearing 4 is press-fitted into the small-diameter groove 2d of the roller 2, and a cylindrical roller 4b (provided that the outer race 4a is guided) The cylindrical roller 4b is held by a cage (not shown)), and the roller 2 is disposed so as to be rotatable relative to the cylindrical roller 4b. It is planned. In addition, in this large diameter concave groove 2c (the concave groove opened on the large diameter side of the main body adjacent to the position where these cylindrical rollers are disposed), the roller 2 is rotated so that the thrust bearing 5 is opposed to the thrust bearing 5. Arranged to be movable. By the way, the thrust bearing 5 includes a pair of guide races 5a and 5b and a roller with a cage guided by the guide races 5a and 5b as shown in FIG.

Next, the mounting bracket 6 disposed in the predetermined gap when the large-diameter surfaces 2a and 3a of the rollers 2 and 3 are opposed to each other will be described with reference to FIGS.
The mounting bracket 6 is composed of a cored bar part 7 and a cored bar support part 8 fixed to the cored bar part 7, and the cored bar part 7 is a cross-section in which a fitting hole is provided in the center part. A disc-shaped base 7a forming a substantially I-shaped material, an intermediate ring 7b forming a substantially ring-shaped cross-sectional material fixed in a projecting manner at the outer peripheral center of the base 7a, and an outer peripheral center of the intermediate ring 7b And an upper ring 7c having a substantially ring-shaped cross section fixed in a projecting manner, and a relatively long hollow cylindrical shaft 7d inserted into the insertion hole of the base 7a (see FIG. 6).

For example, when the mounting bracket 6 is disposed opposite to the large-diameter surface 2a side of the roller 2, the base 7a of the cored bar portion 7 of the thrust bearing 5 incorporated in the roller 2, for example, the guide race 5a. as a side portion 7a ₁ abut, and as its relative R grooves 2b outer peripheral edge 7a ₂ of the base 7a abuts, and, the side end portion 7b ₁ of the middle ring 7b for large diameter surface 2a The hollow cylindrical shaft 7d of the base 7a is disposed so as to abut, and the cylindrical roller 4b of the radial bearing 4 and the thrust bearing 5 described above are rotatably supported by the hollow cylindrical shaft 7d. To place. At this time, the connecting rod 9 for integrating the rollers 2 and 3 extends through the hollow cylindrical shaft 7d to the small diameter surfaces 2f and 3f of the rollers 2 and 3 (the small diameter surface 3f is not shown). Then, the rollers 2 and 3 are arranged so as to be fitted into the fitting holes 2e and 3e (the fitting hole 3e is not shown) (see also FIG. 3).

Further, as shown in FIG. 5, the metal core support portion 8 of the mounting bracket 6 includes a rectangular pedestal 8a and a pair of flanges 8b erected along the edges of both short sides of the pedestal 8a. configured, in the approximate center of the flanges 8b, an insertion hole 8b ₁ having a concentric axis are respectively provided in the longitudinal direction. Bolts 11 and the like are inserted into these insertion holes 8b ₁ in order to fix the roller device 1a to the mounting base 10 of the conveyor C in this embodiment.

Then, in the pedestal 8a, the surface opposite to the side where the flange 8b is erected with respect to the concentric axis of these insertion holes 8b _1, In the roller device 1a, left 45 degrees (a predetermined angle) inclined while ribs 8c is erected on a line position that forms a free end curved portion 8c ₁ of the rib 8c is formed in a substantially semicircular arc, such core metal support 8 has its free end curved portion By fixing 8 c ₁ to an appropriate substantially semicircular arc position of the upper ring 7 c of the core metal part 7, the state is fixed to the core metal part 7. Therefore, when the metal core support portion 8 is fixed to the metal core portion 7, the metal core support portion 8 is more specifically, the concentric axis line by the two insertion holes 8 b ₁ of the metal core support portion 8 is the core metal portion. 7 so as to be inclined 45 degrees to the left with respect to the hollow cylindrical shaft 7d.

As shown in FIG. 1 (B), such a roller device 1a is attached to the mounting base 10 having a U-shaped section material of the conveyor C in such a manner as to be sandwiched between both flanges 8b of the cored bar support 8 and described above. In this manner, the nut 12 is screwed and fixed to the bolt 11 inserted into the insertion hole 8b ₁ of the core metal support portion 8 (the same applies to the roller device 1b). At this time, if the roller devices 1a and 1b are arranged as shown in FIG. 1 (A) while paying attention to the attachment position on the conveyor C composed of only the straight portions, the desired direction can be obtained even under high load. The direction change operation is possible in a space-saving range.

Also, carry-in section C _1, unloading portion C _2, and the time of loading, etc. of goods in these connections C _3, among the component force resulting roller apparatus 1a, in 1b, acts in the direction of falling from the conveyor C min Since the force is canceled out, it is naturally centered and can be transported smoothly.
By the way, in the present embodiment, the left 45-degree tilt roller apparatus 1a and the right 45-degree tilt roller apparatus 1b are illustrated, but it is needless to say that such an inclination angle can be appropriately selected.

(Second Embodiment)
Next, an example in which the high load specification universal roller device according to the second embodiment of the present invention is used for a carriage will be described.
FIG. 7 is a diagram illustrating an example in which the roller devices 1 a and 1 b of the present embodiment are used as the wheels 14 of the carriage 13. In addition, although the four wheels 14 are provided in the trolley | bogie 13, in the figure, only one wheel 14 of them is shown as a representative. Therefore, the other three wheels 14 not specifically shown have the same configuration. However, the two wheels on the X side and the two wheels on the Y side shown in the figure have different attachment angles of the rollers 2 and 3 with respect to the rotation shaft of the wheel 15 as will be described later.

  As shown in the figure, in this example, the roller device 1a (the roller device 1b is not shown) is attached to a cored bar portion integrally formed with the wheel 15, and seven roller devices 1a are attached to the regular heptagon wheel 15. It has been. Since the roller devices 1a and 1b used in this example have the same structure as the roller device described in the first embodiment, the same numbers as those used in the first embodiment are used in the description of the constituent members. Use numbers to explain.

  FIG. 8 is a diagram showing the structure of the wheel 15 which is a main component of the wheel 14 used in this example. The wheel 15 used in this example is integrally formed with a core metal part 17 and a rib 18 for attaching the metal core part 17 to the wheel 15, and on the seven peripheral surfaces 15 a formed on the regular heptagon wheel 15. A cored bar portion 17 with ribs 18 interposed is erected. The wheel 15 is a component constituting the main part of the wheel 14 and is a relatively thin plate-like member. It is a molded part.

  An insertion hole 15c having a key groove 15b is provided at the center of the wheel 15, and is attached to an axle (not shown) that rotates the carriage 13. The core metal part 17 is disposed so as to be inclined 45 degrees to the left with respect to the axle. That is, each cored bar part 17 (each rib 18) of the seven peripheral surfaces 15a of the wheel 15 is erected so as to be inclined 45 degrees to the left with respect to the axle. This core metal part 17 is attached to the X-side wheel 15 shown in FIG. 7, and the roller device 1 a attached to the core metal part 17 is respectively connected to the axle of the wheel 15. It is arranged so as to incline 45 degrees to the right.

  On the other hand, the attachment of the core part 17 to the Y-side wheel 15 shown in FIG. 7 is different from the above in that the seven peripheral surfaces 15a of the wheel 15 are inclined 45 degrees to the right with respect to the axle. The gold part 17 (each rib 18) is erected. In this way, by attaching the metal core part 17 (rib 18) to the Y-side wheel 15 so as to be inclined 45 degrees to the right as opposed to the X side, the roller attached to the Y-side metal core part 17 is attached. The devices 1b are arranged so as to be inclined 45 degrees to the left with respect to the axle of the wheel 15, respectively.

  The cored bar portion 17 used in this example is formed integrally with the wheel 15 unlike the cored bar portion 7 described in the first embodiment, but except for this point, it is the same as in the previous embodiment. It is a simple configuration. Accordingly, the base 17a is formed of a disk-shaped base 17a having a substantially I-shaped section, and an intermediate ring 17b is formed at the center of the outer periphery of the base 17a. At the center of the outer periphery, an upper ring (not shown) is formed that has a projecting substantially ring-shaped mold. Further, when the rollers 2 and 3 are attached to the core metal part 17, the hollow cylindrical shaft 19 is inserted into the insertion hole 17d of the base 17a. FIG. 9 is a view showing a state in which the hollow cylindrical shaft 19 is inserted into the insertion hole 17d of the base 17a.

Next, FIG. 10 is a view showing a state in which the pair of rollers 2 and 3 are attached to the cored bar portion 17 formed integrally with the wheel 15.
As shown in the figure, the rollers 2 and 3 used in this example are also a pair of rollers having a drum-shaped taper as in the first embodiment, and the large-diameter surfaces of the rollers 2 and 3. It arrange | positions so that it may become the aspect which 2a, 3a side opposes via a predetermined clearance gap. Moreover, the cross-sectional structure of the rollers 2 and 3 is the large diameter surface 2a and the R groove 2b, the large diameter concave groove 2c, and the diameter that are provided in a stepped manner from the large diameter surface 2a, as described with reference to FIG. Small recesses 2d are sequentially formed, and a fitting hole 2e communicating with the small-diameter groove 2d communicates with a small through-hole 2g on the small-diameter surface 2f side.

  Further, as shown in FIG. 10, the outer race 4a of the radial bearing 4 is press-fitted into the small-diameter groove 2d of the rollers 2 and 3, and the cylindrical roller 4b guided by the outer race 4a is relative to the cylindrical roller 4b. Accordingly, the corresponding rollers 2 and 3 are arranged so as to be rotatable. A thrust bearing 5 is provided in the large-diameter groove 2c, and the rollers 2 and 3 corresponding to the thrust bearing 5 are disposed so as to be rotatable.

  Then, the rollers 2 and 3 are attached to the core metal part 17 so that, for example, the side surface part of the base 17a of the metal core part 17 contacts the guide race 5a of the thrust bearing 5 incorporated in the rollers 2 and 3. It is arranged so that the outer peripheral end of the base 17a abuts against the R groove 2b, and the side end of the middle ring 17b abuts against the large diameter surface 2a, and the base 17a The hollow cylindrical shaft 19 is arranged such that the cylindrical roller 4b of the radial bearing 4 and the thrust bearing 5 described above are rotatably supported by the hollow cylindrical shaft 19. Then, the connecting rod 20 for integrating the rollers 2 and 3 is inserted through the hollow cylindrical shaft 19 and extended toward the small diameter surfaces 2f and 3f of the rollers 2 and 3, respectively. 3e to be fitted.

FIG. 11 is a view showing a state in which the rollers 2 and 3 are attached to a cored bar portion 17 integrally formed with the wheel 15. FIG. 11 shows a state in which the rollers 2 and 3 are attached to one core metal part 17, and the same method is applied to the core metal part 17 integrally formed at the other six locations of the wheel 15. Then, the rollers 2 and 3 are attached in sequence.
In this way, by using the present embodiment in which the seven metal core portions 17 are integrally formed on the wheel 15, the metal core portions independently attached to the brackets are individually attached to the wheel 15 with bolts one by one. Compared to the case, work efficiency can be improved. Further, by integrally forming the metal core 17 on the wheel 15, the cost can be reduced.

The wheel 15 to which the rollers 2 and 3 are attached is finally attached to the carriage 13 through an axle shaft (not shown) in an insertion hole 15c having a key groove 15b. As described above, for the wheel on the opposite side to the wheel 14 on the X side (the wheel on the Y side in FIG. 7), the roller device 1 b inclined in a different direction with respect to the axle of the wheel 15 is of course used. It is.
By configuring as described above, the roller devices 1a and 1b using the wheel-integrated cored bar portion of this example are excellent in workability and are extremely effective as means for reducing the cost.

  In the description of the above embodiment, the rollers 2 and 3 are attached to the seven cored bar portions 17 formed integrally with the regular heptagon wheel 15, but other angles such as a regular hexagon or a regular octagon. It is good also as a structure which attaches the number of rollers 2 and 3 corresponding to the metal core part integrally formed in the wheel provided. Further, as in the first embodiment described above, the left 45-degree tilt roller apparatus 1a and the right 45-degree tilt roller apparatus 1b are also illustrated in this embodiment. However, such an inclination angle can be appropriately selected. Of course, it is possible.

1a, 1b ·· Roller device 2, 3 · · Roller 2a, 3a · · Large diameter surface 2b · · R groove 2c · · Large diameter concave groove 2d · · Small diameter concave groove 2e · · Insertion hole 2f · · Small diameter surface 2g ··· Small through hole 4 · · · Radial bearing 4b · · · Cylindrical roller 5 · · · Thrust bearing 5a, 5b · · · Guide race 6 · · Bracket 7 · · · Metal core 7a · · · Base 7b · · 7c ··· Upper ring 7d · · · Hollow cylindrical shaft 8 · · · Core support portion 8a · · Base 8b · · Flange 8c · · Rib 9 · · · Connecting rod 11 · · Bolt 12 · · Nut 13 · · · Carriage 14 · · Wheel 15 · · Wheel 15a · · Circumferential surface 15b · · Key groove 15c · · Insertion hole 17 · Metal core 17d · · Hollow cylindrical shaft 18 · · Rib 19 · · Hollow cylindrical shaft 20 · · Connecting rod

Claims (5)

About a pair of rollers whose rolling surfaces are linear or drum-shaped taper, the large-diameter surfaces of these rollers are arranged so as to face each other with a predetermined gap, and arranged so as to be rotatable as a unit. This is a roller device that can be freely set to change direction.
A radial bearing is disposed in the main body of the roller so that the roller is rotatable relative to a cylindrical roller of the radial bearing, and the large bearing of the main body adjacent to the position of the radial bearing is disposed. Thrust bearings are disposed in the concave grooves opened on the radial side, respectively, so that the rollers can rotate relative to the thrust bearings,
These thrust bearings are respectively brought into contact with both side surfaces of the metal core portion of the mounting bracket so that the metal core portion is disposed at the predetermined gap position, and the hollow cylindrical shaft fitted in the center of the metal core portion is connected to the hollow cylinder. Arranged so that the cylindrical roller of the radial bearing and the thrust bearing are rotatably supported by a shaft,
A high-load specification universal roller apparatus, wherein the core metal support portion of the mounting bracket is provided on the core metal portion, and the core metal support portion is provided at a predetermined angle with respect to the hollow cylindrical shaft.   The high-load specification universal roller device according to claim 1, wherein a connecting rod that is inserted through the hollow cylindrical shaft and extends to the small diameter side of the roller is arranged to integrate the roller. About a pair of rollers whose rolling surfaces are linear or drum-shaped taper, the large-diameter surfaces of these rollers are arranged so as to face each other with a predetermined gap, and arranged so as to be rotatable as a unit. This is a roller device that can be freely set to change direction.
A radial bearing is disposed in the main body of the roller so that the roller is rotatable relative to a cylindrical roller of the radial bearing, and the large bearing of the main body adjacent to the position of the radial bearing is disposed. Thrust bearings are disposed in the concave grooves opened on the radial side, respectively, so that the rollers can rotate relative to the thrust bearings,
The thrust bearings are respectively brought into contact with both side surfaces of the cored bar portion so that the cored bar portion is disposed at the predetermined gap position, and the hollow cylindrical shaft fitted in the center of the cored bar portion is Arranged so that the cylindrical roller of the radial bearing and the thrust bearing are rotatably supported,
The high load is characterized in that the metal core portion is integrally provided on a peripheral surface of a wheel which is a predetermined regular rectangular body and is provided so as to form a certain angle with respect to a rotation axis of the wheel. Specification free roller device.   4. The high-load specification universal roller device according to claim 3, wherein connecting rods that pass through the hollow cylindrical shaft and extend to the small diameter side of the roller are arranged to integrate the rollers.   5. The high-load specification universal roller device according to claim 3, wherein the wheel that is the predetermined regular faceted body is a regular heptagonal wheel.

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