JP4945435B2 - Wheel conveyor device - Google Patents

Description

  The present invention relates to a wheel conveyor device used for transferring articles.

  The conventional wheel conveyor apparatus used for transferring articles has a configuration in which wheel conveyor units as shown in FIGS. Here, FIGS. 7A, B, and C are a plan view, a front view, and a side view, respectively, showing the main part of the wheel conveyor unit. Each wheel conveyor unit is arranged in the transfer direction at predetermined intervals with two long plate-like members that face each other and extend in the transfer direction, or a frame 50 as a U-shaped long member that extends in the transfer direction. And a plurality of wheels 52 attached to the frame 50, each wheel 52 being between two long plate-like members as the frame 50 or a long plate-like member having a U-shaped cross section. And is attached to the frame 50 so as to be rotatable. There is also a wheel conveyor unit in which a large number of wheels are rotatably attached to a frame as one long plate-like member at a predetermined interval (for example, Japanese Patent Laid-Open No. 8-2624).

According to such a wheel conveyor device, various articles can be placed on the wheel conveyor device and transferred by a predetermined drive source, gravity or manually in the extending direction of the wheel conveyor unit.
Japanese Unexamined Patent Publication No. 8-2624 Japanese Unexamined Patent Publication No. 2003-54721

  However, many conventional wheel conveyor devices are intended for transfer of relatively light (for example, 500 to 600 kg or less) articles, and are used for transferring heavy (for example, 1 to 2 t) articles. Was complicated and expensive.

  Then, an object of this invention is to provide the wheel conveyor apparatus which can endure a big load with simple structure.

A first aspect of the present invention is a wheel conveyor device for transferring an article to be placed in a predetermined direction,
A cross-section inverted T-shaped frame member having a vertical wall extending in the predetermined direction;
A plurality of wheel mechanisms arranged at predetermined intervals apart from the frame member;
Each wheel mechanism
A rod-shaped member penetrating the vertical wall;
Look including a pair of wheels mounted so as to sandwich the rotatable and the vertical wall around said rod-like member,
The rod-shaped member is a bolt,
Each wheel
An inner annular member through which the rod-shaped member passes,
Including an outer annular member that rotatably fits with the inner annular member via a rolling element,
Each wheel mechanism includes an inner annular member of the pair of wheels sandwiching the vertical wall and an inner end of the pair of wheels by being screwed into an end of a bolt as the rod-shaped member penetrating the vertical wall. A nut as a fastening member for fixing the annular member to the vertical wall;
One of the pair of wheels in each wheel mechanism is configured by overlapping a predetermined number of bearings including an inner ring corresponding to the inner annular member and an outer ring corresponding to the outer annular member, and the other is the bearing. And a predetermined number of the same type of bearings .

According to a second aspect of the present invention, in the first aspect of the present invention,
The frame member is made of two angle steels,
The two angle steels are characterized in that long plate-like portions are overlapped back to back, and the plate-like portions are arranged so as to form the vertical wall.

According to a third aspect of the present invention, in the first or second aspect of the present invention,
A plurality of the frame members to which the plurality of wheel mechanisms are attached;
The plurality of frame members may be arranged in parallel with each other with a predetermined distance therebetween.

According to the first aspect of the present invention, the two wheels included in each wheel mechanism form a pair, and are attached to the vertical wall of the frame so as to sandwich the vertical wall via a rod-like member that passes through them. Therefore, the load of the article is applied in a balanced manner to each of the wheel pairs that contact the article to be transferred, and these loads are supported by the vertical walls sandwiched between the wheel pairs. Accordingly, the load of the article to be transferred is applied substantially in parallel to the vertical wall of the frame, and the frame is not easily deformed by the load, so that it can withstand a large load.
In addition, each wheel can be configured using a bearing as a general-purpose part, and is attached by screwing a nut into a bolt as a rod-shaped member. Therefore, a wheel conveyor device that can withstand a large load with a simple configuration is provided. It can be realized at low cost.
In addition, since each wheel pair in each wheel mechanism is configured by overlapping the same number of bearings of the same type, the transfer of the articles is stabilized, and each of the wheel pairs in contact with the articles to be transferred is associated with the articles. Load is applied in a more balanced manner, and deformation of the frame due to the load of the article is less likely to occur. Further, since the wheel pairs are attached by screwing nuts to bolts as fixed shafts, the number of bearings constituting each wheel pair can be easily increased or decreased as necessary.

  According to the second aspect of the present invention, the vertical wall (of the frame) that supports each wheel pair via the rod-like member is formed by putting two angled steel plate-like portions as general-purpose parts back to back. And has high rigidity. Therefore, by using a highly rigid member as the rod-shaped member, a wheel conveyor device that can withstand a large load with a simple configuration can be realized at low cost.

According to the third aspect of the present invention, since the frame members to which the plurality of wheel mechanisms are attached are arranged in parallel with each other at a predetermined distance, a wide article (for example, a plurality of articles are placed). Pallets etc.) can be transported easily.

It is a perspective view which shows the wheel conveyor apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the pallet mounted in the wheel conveyor apparatus which concerns on the said 1st Embodiment. It is a top view which shows the principal part of the wheel conveyor apparatus which concerns on the said 1st Embodiment. It is a front view which shows the principal part of the wheel conveyor apparatus which concerns on the said 1st Embodiment. It is a right view which shows the principal part of the wheel conveyor apparatus which concerns on the said 1st Embodiment. It is a left view which shows the principal part of the wheel conveyor apparatus which concerns on the said 1st Embodiment. It is a top view which shows the structure of the principal part of the conventional wheel conveyor apparatus. It is a front view which shows the structure of the principal part of the conventional wheel conveyor apparatus. It is a side view which shows the structure of the principal part of the conventional wheel conveyor apparatus. It is a top view which shows the principal part of the wheel conveyor apparatus of an example different from the said 1st Embodiment. It is a perspective view which shows the wheel conveyor apparatus which concerns on the 2nd Embodiment of this invention. It is a top view which shows the principal part of the wheel conveyor apparatus which concerns on the said 2nd Embodiment. It is a front view which shows the principal part of the wheel conveyor apparatus which concerns on the said 2nd Embodiment. It is a front view which shows the principal part of the wheel conveyor apparatus which concerns on the modification of the said 2nd Embodiment.

Explanation of symbols

10 ... Frame 10a, 10b, 60a, 60b ... Angle iron
11, 61a, 61b ... bolt (bar-shaped member)
12a, 12b, 62a, 62b ... Wheels 12a1, 12a2, 12b1, 12b2 ... Bearings 14, 66a, 66b ... Nuts (fastening members)
20, 65a, 65b ... vertical wall 30, 90 ... wheel mechanism 80 ... pipe 121 ... inner ring member (inner ring)
122 ... Outer ring member (outer ring)
100a to 100c, 101 ... wheel conveyor units 102a to 102d ... wheel conveyor subunits 200a to 200e ... connecting members

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
<1. First Embodiment>
<1.1 Overall configuration>
FIG. 1 is a perspective view showing a wheel conveyor device according to a first embodiment of the present invention. The wheel conveyor device includes three wheel conveyor units 100a, 100b, and 100c extending in a direction in which an article placed on the wheel conveyor device is to be transferred (hereinafter simply referred to as “transfer direction”), and the three wheel conveyor units 100a. , 100b, 100c are separated by a predetermined distance L1 and are connected so as to be arranged parallel to each other. Here, the predetermined distance L1 is determined according to the width of the article to be transferred.

  Each of the wheel conveyor units 100a to 100c includes a frame 10 made of a long rigid member having an inverted T-shaped cross section, and a number of wheels rotatably attached to the frame 10 so as to be aligned in the transfer direction at a predetermined interval L2. It has a pair 12a, 12b. The wheel conveyor device is placed on a horizontal plane or an inclined plane, on which an article to be transferred is placed. For example, as shown in FIG. 2, a pallet 300 can be placed on the wheel conveyor device, and a plurality of articles (not shown) can be loaded on the pallet 300 and transferred.

<1.2 Main components>
Next, the structure of the principal part of the wheel conveyor apparatus which concerns on this embodiment is explained in full detail with reference to FIGS. 3, 4, 5, and 6 are a plan view, a front view, a right side view, and a left side view, respectively, showing the main part of the wheel conveyor device. However, in FIG. 3 and FIG. 4, for the sake of convenience, the distance L1 between adjacent wheel conveyor units among the three wheel conveyor units 100a to 100c is shortened, and the connecting members 200a to 200d are omitted. Has been.

  As described above, each of the wheel conveyor units 100a to 100c includes a frame 10 made of a long rigid member having an inverted T-shaped cross section, and a number of wheel mechanisms attached to the frame 10 so as to be aligned in the transfer direction. 30. The frame 10 includes two angle steels (angles) (for example, angle steels having a thickness of 5 mm and a cross section of 40 mm × 40 mm) 10a and 10b. The two angle steels 10a and 10b have long plate-like portions back to back. Are formed into a long member having a reverse T-shaped cross section. And two plate-shaped parts which faced back to back among these two angle steels 10a and 10b form the vertical wall (wall surface parallel to a vertical line) 20 extended in a transfer direction. The multiple wheel mechanisms 30 are attached to the vertical wall 20 with a predetermined interval L2 (for example, 40 mm).

  Each wheel mechanism 30 includes a pair of the wheels 12a and 12b, and the pair of wheels 12a and 12b are attached to the frame 10 so as to sandwich the vertical wall 20 and to be rotatable. Specifically, each wheel mechanism 30 is attached to the frame 10 as follows. That is, the vertical wall 20 of the frame 10 is provided with through holes at the predetermined interval L2 (one for each wheel mechanism), and the rigidity as a fixed shaft that becomes the rotation center of each wheel 12a, 12b. The rod-shaped member 11 is penetrated. In the present embodiment, a bolt (for example, a M10 × 65 mm hexagon bolt) is used as the rod-like member 11, and one of the wheel pairs 12 a and 12 b in advance of one wheel 12 b and Corresponding washers 13b are fitted into the bolts 11 in order. When the bolt 11 fitted with the one wheel 12b and the washer 13b passes through the vertical wall 20, the other washer 13a and the wheel 13a are fitted in turn, and a nut (for example, a hexagon nut) 14 as a fastening member is attached to the bolt 11. The wheel mechanism 30 is attached to the frame by screwing. The wheels 12a and 12b in the present embodiment include an outer annular member and an inner annular member as will be described later. When the wheel mechanism 30 is attached to the frame 10 as described above, the bolt 11 as a fixed shaft is provided. When the nut 14 is screwed into the bolt 11 as described above, the inner annular member in the wheel pair 12a, 12b sandwiches the vertical wall 20 via the washers 13a, 13b. Thus, the bolt head 11b and the nut 14 are fastened and fixed to the frame 10.

  As shown in FIGS. 5 and 6, each wheel 12a, 12b is rotatable via an inner annular member 121 through which the bolt 11 as a fixed shaft passes and a rolling element (that is, rotated by a bearing mechanism). It consists of the outer annular member 122 fitted to the inner annular member 121. Here, the pair of wheels 12a and 12b are components having substantially the same shape and structure (or a structure having a symmetric shape and structure with respect to the vertical wall 20 when they are attached to the frame 10). In this embodiment, two bearings (for example, a deep groove ball bearing of a product number 6300ZZ having an outer diameter of 35 mm) are overlapped in the axial direction two by two as a part composed of an inner ring and an outer ring rotatably fitted to the inner ring. Each wheel 12a, 12b is configured. That is, as shown in FIG. 4, the wheel 12a is composed of two bearings 12a1 and 12a2, and the wheel 12b is composed of two bearings 12b1 and 12b2. The inner and outer rings of the bearings 12a1 and 12a2 correspond to the inner annular member 121 and the outer annular member 122 of the wheel 12a, respectively. The inner and outer rings of the bearings 12b1 and 12b2 correspond to the inner annular member 121 and the outer circle of the wheel 12b. Each corresponds to the annular member 122.

  A through-hole (in the vertical wall 20 of the frame 10) through which the bolt 11 as a fixed shaft serving as the center of rotation of each wheel 12a, 12b is inserted, so that the wheel 12a, 12b is mounted when the wheel mechanism 30 is attached to the vertical wall 20. The upper end of the frame 10 is provided at a position slightly higher than the upper end of the vertical wall 20 of the frame 10. For example, when the outer diameter of each wheel 12a, 12b is 35 mm and one side of the cross section of the angle steels 10a, 10b constituting the frame 10 is 40 mm, the through hole in the vertical wall 20 from the installation surface 500 of the wheel conveyor device The height H1 to the center is about 30 mm (see FIG. 4). In this case, the height from the installation surface 500 to the upper end of the vertical wall 20 of the frame 10 is 40 mm, whereas the height H2 from the upper end of each wheel 12a, 12b is 47.5 mm. Thus, since the upper end of each wheel 12a, 12b becomes higher than the upper end of the vertical wall 20, the articles placed on the wheel conveyor device contact the wheels 12a, 12b without contacting the vertical wall 20, Smooth transfer of the article becomes possible.

<1.3 Action and effect>
According to the present embodiment as described above, the article to be transferred abuts on the wheels 12a and 12b of the multiple wheel mechanisms 30 attached to each frame 10, and the load of the article is applied to the wheels 12a and 12b. The wheels 12a and 12b included in each wheel mechanism 30 form a pair, and are attached to the vertical wall 20 of the frame 10 via a bolt 11 as a single fixed shaft that passes through them. 12 a and 12 b have symmetrical shapes and structures with respect to the vertical wall 20. For this reason, the load of the article is applied to each of the wheel pairs 12a and 12b in contact with the article to be transferred in a well-balanced manner (approximately the same amount), and these loads are supported by the vertical wall 20 corresponding to the symmetry plane. Therefore, the load of the article to be transferred is applied almost in parallel to the vertical wall 20 of the frame 10 due to such symmetry, and the frame 10 is not easily deformed by the load. And the said vertical wall 20 is formed by making the plate-shaped part of the two angle steels 10a and 10b back to back, and has high rigidity. Therefore, by using a highly rigid member as the bolt (rod-like member) 11 that passes through the wheel pair 12a, 12b and the vertical wall 20 and is supported by the vertical wall 20, it can withstand a large load (for example, about 2t or more). Can do. In this way, a wheel conveyor device that can withstand a large load with a simple configuration can be realized at low cost by using angle steel, a bearing, or the like as a general-purpose component.

  Each of the pair of wheels 12a and 12b is composed of two bearings (the bearings 12a1 and 12a2 constituting the wheel 12a or the bearings 12b1 and 12b2 constituting the wheel 12b). If so, each wheel may be composed of one or three or more bearings. And the stability in the conveyance of articles | goods can be improved by increasing the number of the bearings which comprise each wheel. According to the above-described embodiment, the inner annular member 121 of the wheel pair 12a, 12b is fixed to the frame 10 by screwing the nut 14 to the bolt 11 as a fixed shaft that passes through each bearing constituting the wheel pair 12a, 12b. (The vertical wall 20), the number of bearings constituting each wheel 12a, 12b can be easily increased or decreased as necessary.

  Note that in the conventional configuration (FIGS. 7A to 7C) in which the wheel is supported by the two plate-like members constituting the frame, the manufacturing difficulty increases when the article is transferred along the curved path. In the embodiment, the pair of wheels 12a and 12b are supported by the single vertical wall 20 in the frame 10 via the bolt 11 as a fixed shaft. Therefore, when the article is transferred along a curved path. Manufacture is facilitated as compared to the conventional configuration.

<1.4 Modification>
In the above embodiment, the frame 10 constituting each of the wheel conveyor units 100a to 100c is composed of two angle steels 10a and 10b back to back, but is not limited to this, for example, a cross-section inverted T-shaped as a single unit A long rigid member (for example, a steel member) may be used. However, from the viewpoint of realizing a wheel conveyor device capable of withstanding a large load at low cost, it is preferable to use angle steel as a general-purpose part.

  In addition, as a component of the wheel conveyor device (the frame 10, the wheels 12a and 12b, the bolt 11 as a fixed shaft, etc.), a member made of a material having high rigidity such as steel is used from the viewpoint of load resistance. Although it is preferable, members of other materials such as other metals (for example, aluminum) or synthetic resins may be used in consideration of cost, weight and the like according to the type and application of the article to be transferred.

<1.5 Others>
Although the configuration is different from that of the above-described embodiment, a wheel conveyor device that can withstand a large load can be realized at a low cost even by the configuration shown in FIG. FIG. 8 is a plan view of the wheel conveyor device. About a side view, it is the same as that of the side view of the conventional wheel conveyor apparatus shown to FIG. 7C. This wheel conveyor device includes two angle steels 40a, 40b whose vertical walls 45a, 45b are arranged to face each other, a wheel 42 arranged between the two angle steels 40a, 40b, and a wheel 42. It comprises a bolt 41, washer 43a, 43b, and a nut 44 for supporting between the two angle steels 40a, 40b. Through holes are provided in the vertical walls 45a and 45b of the two angle steels 40a and 40b that support the wheel 42, and a bolt 41 as a fixed shaft serving as a rotation center of the wheel 42 passes through the through holes. . A nut 44 is screwed into the bolt 41 that has passed through the through hole. Washers 43a and 43b are fitted between the wheel 42 and the vertical walls 45a and 45b.

  As shown in FIG. 8, each wheel 42 disposed between the vertical wall 45a and the vertical wall 45b is composed of five bearings, thereby improving the stability of article transfer. Further, since the bolt 41 and the nut 44 are used to support the wheel 42, the number of bearings constituting each wheel 42 can be easily adjusted.

<2. Second Embodiment>
<2.1 Overall configuration>
FIG. 9 is a perspective view showing a wheel conveyor device according to the second embodiment of the present invention. The wheel conveyor device includes a wheel conveyor unit 101 including two wheel conveyor subunits 102a and 102b extending in a transfer direction of an article placed thereon, and the two wheel conveyor subunits 102a and 102b by a predetermined distance L6. And a rigid connecting member 200e that is connected so as to be spaced apart from each other in parallel. Here, the predetermined distance L6 is determined according to the width of the article to be transferred.

  Each wheel conveyor subunit 102a, 102b has angle irons 60a, 60b as frames which are long rigid members having an L-shaped cross section, and angle steel 60a so as to align with the transfer direction at a predetermined interval L7. , 60b, and wheels 62a, 62b rotatably attached thereto. A pipe 80 as a cylindrical member that covers the outer peripheral surfaces of the wheels 62a and 62b is provided between the wheel conveyor subunits 102a and 102b. The wheel conveyor device is placed on a horizontal plane or an inclined plane, on which an article to be transferred is placed. For example, a plurality of articles can be loaded on a pallet and transferred.

  In the present embodiment, an example in which angle steel, which is a long rigid member having an L-shaped cross section, is applied to the frame is described. However, the present invention is not limited to this, and for example, a cross section An inverted T-shaped long rigid member can also be applied to the frame.

<2.2 Main configuration>
Next, the structure of the principal part of the wheel conveyor apparatus which concerns on this embodiment is explained in full detail with reference to FIG. 10 and FIG. FIG. 10 is a plan view showing a main part of the wheel conveyor device. FIG. 11 is a front view showing a main part of the wheel conveyor device. However, in FIG. 10 and FIG. 11, for the sake of convenience, the distance L6 between the wheel conveyor subunits is shortened, and the connecting member 200e is omitted.

  The wheel conveyor unit 101 includes a pair of angle steels 60a and 60b, which are long rigid members having an L-shaped cross section, and a plurality of angle steels 60a and 60b arranged in alignment with the transfer direction. And a wheel mechanism 90. One surface of the angle steels 60 a and 60 b is arranged on the installation surface 500, and the other surface forms vertical walls 65 a and 65 b perpendicular to the installation surface 500. Hereinafter, the angle steel 60a side of the angle steels 60a and 60b that support the wheel mechanism 90 will be described. In addition, it becomes the same structure also about the angle iron 60b side.

  A wheel 62 a is included on the angle steel 60 a side of the wheel mechanism 90. The wheel 62a is rotatably attached to the angle steel 60a so that the rotation surface thereof and the vertical wall 65a are parallel to each other. Specifically, the wheel 62a is attached to the angle steel 60a as follows. That is, the vertical wall 65a of the angle steel 60a is provided with through holes at the predetermined interval L7 (one for each wheel 62a), and has a rigidity as a fixed shaft serving as the rotation center of each wheel 62a. A rod-shaped member (shaft) is passed through. In this embodiment, a bolt (for example, a bolt having a diameter of 15 mm) 61a is used as the rod-like member, and the washer 63a is fitted into the bolt 61a in advance when penetrating the vertical wall 65a. When the bolt 61a passes through the vertical wall 65a, the washer 64a and the wheel 62a are fitted in order, and a nut (for example, a hexagonal nut) 66a as a fastening member is screwed into the bolt 61a, so that the wheel 62a is engaged with the angle steel 60a. It is attached. As a result, an inner annular member to be described later in the wheel 62a is fastened by the bolt head 71a and the nut 66a and fixed to the angle steel 60a so that the rotating surface of the wheel 62a is parallel to the vertical wall 65a via the washer 64a. The

  As in the first embodiment, the wheel 62a is configured by an inner annular member through which the bolt 61a passes and an outer annular member that is rotatably fitted to the inner annular member. For example, the wheel 62a is realized by a bearing as a component including an inner ring and an outer ring that is rotatably fitted to the inner ring. Here, the number of bearings constituting each wheel may be one or two or more as long as the number of bearings constituting each of the wheels 62a and 62b is the same. By increasing the number of bearings constituting each wheel, it is possible to improve the stability in transferring articles.

  The wheel conveyor subunits 102a and 102b are arranged such that their vertical walls 65a and 65b face each other. At this time, in order to enhance the stability when the article is transferred, the surface of each of the angle steels 60 a and 60 b that is in contact with the installation surface 500 is disposed so as to face the inside of the wheel mechanism 90. Further, the wheel conveyor subunits 102a and 102b are arranged such that the outer peripheral surface of the wheel 62a is covered with one end 67 of the inner peripheral surface of the pipe 80 and the outer peripheral surface of the wheel 62b is covered with the other end 68 of the inner peripheral surface of the pipe 80. A pipe 80 is disposed therebetween. As described above, the wheel mechanism 90 is formed between the wheel conveyor subunits 102a and 102b.

  The through hole through which the bolt 61a serving as a fixed shaft serving as the rotation center of the wheel 62a is provided is provided at a position where the upper end of the pipe 80 is slightly higher than the upper end of the vertical wall 65a of the angle steel 60a. For example, when the outer diameter of the pipe 80 is 35 mm and one side of the cross section of the angle steel 60a is 40 mm, the height H6 from the installation surface 500 of the wheel conveyor device to the center of the through hole in the vertical wall 65a is about 30 mm. (See FIG. 11). In this case, the height from the installation surface 500 to the upper end of the vertical wall 65a of the angle steel 60a is 40 mm, whereas the height H7 to the upper end of the pipe 80 is 47.5 mm. Thus, since the upper end of the pipe 80 becomes higher than the upper end of the vertical wall 65a, the article placed on the wheel conveyor device does not contact the vertical wall 65a but abuts on the pipe 80, so that the article is smooth. Transfer is possible.

<2.3 Action and effect>
According to the present embodiment as described above, the article to be transferred comes into contact with the pipes 80 of the multiple wheel mechanisms 90 disposed between the angle steels 60a and 60b as the frames. The pipe 80 has a cylindrical shape, and is provided so as to cover the wheel 62a at one end and the wheel 62b at the other end. For this reason, the load of the article on the pipe 80 is applied to the wheels 62 a and 62 b through the pipe 80. Here, in each wheel mechanism 30, the shape and structure of the wheel conveyor subunits 102 a and 102 b are symmetrical when viewed from the center of the pipe 80. For this reason, the load of the article to be transferred is applied to each of the wheels 62a and 62b in a balanced manner (approximately the same amount), and these loads are supported by the vertical walls 65a and 65b facing each other. Therefore, due to such symmetry, the load of the article to be transferred is not applied to only one of the vertical walls 65a and 65b, and the angle steels 60a and 60b are not easily deformed by the load. Therefore, a large load (for example, about 2 t) can be obtained by using highly rigid members as bolts (rod-like members) 61a and 61b that pass through the wheels 62a and 62b and the vertical walls 65a and 65b and are supported by the vertical walls 65a and 65b. Can withstand the above). In this way, a wheel conveyor device that can withstand a large load with a simple configuration can be realized at low cost by using angle steel, a bearing, or the like as a general-purpose component. Further, according to the present embodiment, the article (or the pallet on which the article is loaded) is transferred on the pipe 90. That is, the article is transferred on the planar conveyance path. For this reason, it is possible to transfer even a small article by this apparatus. Further, since the wheels 62a and 62b are covered with the pipe 80, the wheels 62a and 62b do not fit into the holes provided on the back surface of the pallet. Further, since no load is directly applied to the wheels 62a and 62b, for example, when the cardboard box is transported, the bottom surface of the corrugated cardboard box is not damaged.

<2.4 Modification>
In the above embodiment, the wheel conveyor device is realized by one wheel conveyor unit 101 including a pair of wheel conveyor subunits 102a and 102b, but the present invention is not limited to this. For example, as shown in FIG. 12, a wheel conveyor unit 101a composed of wheel conveyor subunits 102a and 102b and a wheel conveyor unit 101b composed of wheel conveyor subunits 102c and 102d, that is, two wheel conveyor units It can also be set as the structure by which a conveyor apparatus is implement | achieved. In this case, in the adjacent portions of the wheel conveyor units adjacent to each other, as in the first embodiment, the long plate-shaped portions of the angle steel are abutted back to back to each other so that the cross section is inverted T-shaped. What is necessary is just to comprise a elongate member.

According to this modification, since a wheel conveyor device is realized by a plurality of wheel conveyor units, a larger article can be conveyed. Moreover, since the vertical wall is formed in the part which the adjacent wheel conveyor subunits couple | bond together, the plate-shaped part of angle iron is made back-to-back, it has high rigidity. For this reason, the wheel conveyor apparatus which can endure a bigger load is implement | achieved.

Claims (3)

A wheel conveyor device for transferring an article to be placed in a predetermined direction,
A cross-section inverted T-shaped frame member having a vertical wall extending in the predetermined direction;
A plurality of wheel mechanisms arranged at predetermined intervals apart from the frame member;
Each wheel mechanism
A rod-shaped member penetrating the vertical wall;
Look including a pair of wheels mounted so as to sandwich the rotatable and the vertical wall around said rod-like member,
The rod-shaped member is a bolt,
Each wheel
An inner annular member through which the rod-shaped member passes,
Including an outer annular member that rotatably fits with the inner annular member via a rolling element,
Each wheel mechanism includes an inner annular member of the pair of wheels sandwiching the vertical wall and an inner end of the pair of wheels by being screwed into an end of a bolt as the rod-shaped member penetrating the vertical wall. A nut as a fastening member for fixing the annular member to the vertical wall;
One of the pair of wheels in each wheel mechanism is configured by overlapping a predetermined number of bearings including an inner ring corresponding to the inner annular member and an outer ring corresponding to the outer annular member, and the other is the bearing. A wheel conveyor device, wherein the predetermined number of bearings of the same type are stacked . The frame member is made of two angle steels,
2. The wheel according to claim 1, wherein the two angle steels are arranged such that long plate-like portions overlap each other back to back, and the plate-like portions form the vertical wall. Conveyor device. A plurality of the frame members to which the plurality of wheel mechanisms are attached;
The wheel conveyor apparatus according to claim 1, wherein the plurality of frame members are arranged in parallel with each other with a predetermined distance therebetween.

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