JPH0912122A - Wheel unit and conveyor - Google Patents

Abstract

PURPOSE: To miniaturize a device, and to improve the assembling property with the simple structure, and to cope with the carrying of small articles. CONSTITUTION: A wheel unit 11 is formed of a wheel 12 and a wheel frame 13. The wheel 12 has a roller part 14, and each shaft part 15 is projected from both ends of the roller part 14. The wheel frame 13 has a wheel housing recessed part 20, in which the wheel 12 is to be fitted, and the edge of the wheel housing recessed part 20 is provided with a shaft receiving groove 21 for supporting the shaft part 15 of the wheel 12 freely to be turned. A device is thereby miniaturized, and the assembling property thereof is improved with the simple structure, and it can cope with the carrying of small articles.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel unit using a wheel and a conveyor using the wheel unit.

[0002]

2. Description of the Related Art Conventional conveyors include, for example, roller conveyors and wheel conveyors.

In the roller conveyor, the conveyor frames on both sides are connected by a horizontal joint member to be integrated, and a plurality of rollers are rotatably arranged side by side along the conveyor frames.

Further, in the wheel conveyor, the conveyor frames on both sides are connected by a horizontal joint member to be integrated,
A plurality of shafts are arranged in parallel along the conveyor frame, and a plurality of wheels are rotatably supported on each shaft.

[0005]

However, conventional roller conveyors and wheel conveyors have problems that it is difficult to make them small in size, their structure is complicated, and their assemblability is poor.
In addition, in the case of a small conveyed object, the conveyed object is largely dropped between the rollers or between the wheels, so that there is a problem that the conveying is difficult.

The present invention has been made in view of the above circumstances, and provides a wheel unit that can be constructed in a small size and has a simple structure and good assembling property, and a conveyor using the wheel unit that can handle small items. The purpose is to do.

[0007]

According to another aspect of the present invention, there is provided a wheel unit having a roller portion and a wheel having a shaft portion projecting from both ends of the roller portion, the wheel unit being formed in an elongated shape in the longitudinal direction thereof. A plurality of wheel accommodating recesses are formed along which the wheels are rotatably fitted, and a bearing groove for rotatably supporting the shaft of the wheel is formed at an edge of each wheel accommodating recess. And a wheel frame.

According to another aspect of the present invention, a conveyor frame is provided on both sides of the conveyor frame, a plurality of transverse joint members connecting the conveyor frames on both sides, and a plurality of the transverse joint members are arranged in parallel between the conveyor frames on both sides. The wheel unit according to claim 1 attached.

According to a third aspect of the present invention, in the conveyor according to the second aspect, a frame fitting recess into which the wheel frame of the wheel unit is fitted is provided on the upper surface of the conveyor frame.

A conveyor according to a fourth aspect is the conveyor according to the second or third aspect, wherein the wheel is rotatably supported along the longitudinal direction of the wheel frame, and the wheel is in the longitudinal direction of the wheel frame. The wheel unit is rotatably supported in the orthogonal direction.

A conveyor according to a fifth aspect is the conveyor according to any one of the second to fourth aspects, in which a plurality of fitting portions for fitting the horizontal joint members are provided on the wheel frame of the wheel unit, and the plurality of fitting portions are provided inside the conveyor frame. A groove is provided along the longitudinal direction in which the end of the joint member is slidably fitted.

[0012]

In the wheel unit according to the present invention, the wheel is housed in a plurality of wheel housing recesses formed along the longitudinal direction of the wheel frame, and the wheel is installed in the bearing groove formed at the edge of the wheel housing recess. Since the shaft part of is rotatably supported, it has a small size.
It is suitable for small items.

In the conveyor according to the second aspect, since the wheel units according to the first aspect are arranged side by side to form the conveying surface, even small conveyed articles are conveyed.

In the conveyor according to claim 3, in addition to the function of the conveyor according to claim 2, since the wheel unit is fitted and mounted in the frame fitting concave portion of the conveyor frame, the conveyor frame is effectively used as a carrying surface. Used.

In the conveyor according to claim 4, in addition to the function of the conveyor according to claim 2 or 3, a wheel unit in which a wheel is rotatably supported along the longitudinal direction of the wheel frame, and the wheel is a wheel frame. By including a wheel unit that is rotatably supported in a direction orthogonal to the longitudinal direction, the conveyed items can be conveyed in the orthogonal direction, and the conveyed items can be joined and branched.

In addition to the function of the conveyor according to any one of claims 2 to 4, the conveyor according to claim 5 is mounted by fitting the fitting portion of the wheel unit to the transverse joint member on the conveyor frame side, The horizontal joint member is slid along the groove portion of the conveyor frame corresponding to the position of the fitting portion of the wheel unit.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of a wheel unit and a conveyor of the present invention will be described below with reference to the drawings.

First, FIGS. 1 to 7 show a first embodiment.

1 to 3 show a wheel unit 11, which comprises a plurality of wheels 12 and
And a wheel frame 13.

The wheel 12 is made of, for example, synthetic resin and integrally formed, and has a small-diameter roller portion 14 having a diameter of about 12.5 mm and a width of about 10 mm, for example. A shaft portion 15 having a diameter of about 2 mm is provided so as to project, and the ratio of the diameter of the roller portion 14 to the diameter of the shaft portion 15 is 6 times or more.

The wheel frame 13 is made of synthetic resin, for example, and is integrally molded to have a length of about 150 mm and a width of 15 mm.
It is formed in a slender shape of about mm, and a frame frame 18 is formed by the side plate portions 16 on both sides and the end plate portions 17 on both ends, and the inside of the frame frame 18 is formed by a plurality of partition plate portions 19 along the longitudinal direction. It is partitioned to form a plurality of wheel storage recesses 20 in the vertical direction. Wheel storage recess 20
The wheel 12 having a circumferential surface oriented in the longitudinal direction of the wheel frame 13 is rotatably housed.

A bearing groove for rotatably supporting a shaft portion 15 of the wheel 12 is formed in the side plate portions 16 on both sides of each wheel storage recess 20.
21 are formed. The bearing groove 21 has a groove width near the opening of the upper surface narrower than the diameter of the shaft portion 15, and a bearing hole portion 21a into which the shaft portion 15 is rotatably slidably fitted is formed on the lower side thereof. The shaft portion 15 press-fitted into the bearing hole portion 21a from above 21 is retained and retained.

Both side plate portions near both ends of the wheel frame 13
A fitting groove 22 is formed in the 16 as a fitting portion. The fitting groove 22 has a groove width near the opening on the lower surface narrower than the diameters of the lateral joint members 33a and 33b, which will be described later, and the lateral joint member 33 is provided on the upper side thereof.
Fitting holes 22a that fit into a and 33b are formed, and the fitting groove 22 is retained and retained while being pressed into the lateral joint members 33a and 33b. Notches 23 are formed on both sides of the fitting groove 22, respectively, and holding piece portions 24 forming both side edges of the fitting groove 22 are elastically swingable.

A convex portion 25 slightly protruding from the side plate portion 16 is formed on the upper side of the fitting groove 22, and a through hole 26 is formed outside each notch 23 on both sides of the fitting groove 22. It should be noted that the width of the wheel frame 13 is accurate at the positions of the convex portions 25 protruding on both sides of the wheel frame 13.

Then, the wheels 12 are fitted from above the respective wheel storage recesses 20 of the wheel frame 13 to form the wheel 12
The shaft portion 15 is held in the bearing groove 21 by press-fitting the shaft portion 15 into the bearing groove 21. At this time, the ratio of the diameter of the wheel 12 to the diameter of the shaft portion 15 is set to 6 times or more, so that the shaft portion is compared with the contact resistance with the conveyed object added to the peripheral surface of the wheel 12.
The contact resistance between the bearing 15 and the bearing groove 21 can be reduced, and the wheel 12 can be rotatably supported without using a bearing.

The wheel unit 11 is a long wheel unit 11 having a large number of wheels 12 as shown in FIG.
There are two types, a short wheel unit 11 with a small number of wheels 12, and the positions of the wheels 12 of both wheel units 11 are arranged in an alternate manner with the fitting grooves 22 of both wheel units 11 aligned. It has become.

FIGS. 4 to 6 show a conveyor 31 using the wheel unit 11. The conveyor 31 includes conveyor frames 32 on both sides, and the conveyor frames 32 on both sides.
Are connected by a plurality of horizontal joint members 33a and 33b, and a plurality of wheel units 11 are mounted in parallel between the conveyor frames 32 on both sides.

The conveyor frame 32 is made of, for example, aluminum and is formed by extrusion molding. Grooves 34, 35 are formed on the inner side and the outer side facing each other along the longitudinal direction, and a dovetail-shaped groove is formed on the lower surface. A mounting groove 36 is formed. Corresponding to the mounting position of the lateral joint member 33a, the groove portion 34,
A mounting hole 37 that penetrates 35 is formed.

The lateral joint members 33a and 33b are made of aluminum, for example, and are formed in a pipe shape by extrusion molding, as shown in FIG. 7, having a flat detent portion 38 in a part of the peripheral surface. The one lateral joint member 33a is slightly shorter than the other lateral joint member 33a, and the lateral joint members 33a having different lengths corresponding to the longitudinal direction of the wheel unit 11 are formed.
, 33b are used as one set.

Then, in order to assemble the conveyor 31, the transverse joint members 33 are provided in the grooves 34 inside the conveyor frames 32 on both sides.
The ends of a and 33b are fitted together, and the tapping screw 39 is attached from the outside of the conveyor frame 32 through the mounting hole 37 to the horizontal joint member 33a.
And the conveyor frames 32 on both sides are integrally fixed to each other via the horizontal joint member 33a. At this time, the horizontal joint member 33a
, 33b of the detent 38 is the groove 34 of the conveyor frame 32.
And the horizontal joint members 33a and 33b are prevented from rotating.

The short horizontal joint member 33b is not fixed between the conveyor frames 32 on both sides and can move freely in the groove 34, and the conveyor frame 32 on both sides and the horizontal joint member 33b are assembled together. Even afterward, the lateral joint members 33b can be inserted obliquely between the conveyor frames 32 on both sides, and both ends of the lateral joint members 33b can be fitted into the grooves 34 of the conveyor frame 32.

Further, each fitting groove 22 of the wheel unit 11
Align the horizontal joints 33a and 33b on the wheel unit.
11 is pushed in from above to fit each fitting groove 22 into the lateral joint member 33a,
Fit to 33b. As a result, the holding piece portions 24 on both sides of each fitting groove 22 are fitted to the lateral joint members 33a and 33b, and the wheel unit 11 is held by the lateral joint members 33a and 33b.

In this way, the conveyor frames on both sides are
A plurality of wheel units 11 are assembled between 32 and installed side by side.

When the wheel unit 11 is assembled, the horizontal joint member 33b is movable, so that the pitch of the two fitting grooves 22 of the wheel unit 11 and the horizontal joint members 33a, 33b.
Even if the pitch is deviated, it can be dealt with by moving the horizontal joint member 33b. In addition, the lateral joint members 33a, 33b
An error in the pitch of both fitting grooves 22 of each wheel unit 11 assembled to can be dealt with by elastic deformation of the holding piece portion 24.

Further, as shown in FIG. 3, a spring 40 is used. The spring 40 is passed under the lateral joint members 33a, 33b, and both ends of the spring 40 are provided in the through holes 26 on both sides of the fitting groove 22, respectively. The horizontal joint member 33a,
It is possible to prevent the wheel unit 11 from rising and falling off with respect to the 33b.

In the conveyor 31 constructed as above,
As shown in FIG. 6, the conveying surface is constituted by a plurality of wheel units 11 each having a small-diameter wheel 12, so that even if the conveyed object is a small object, it is less likely to fall between the wheels 12 and the small object can be conveyed.

Particularly, in the conveyor 31 shown in FIG. 6, the wheels of the wheel units 11 adjacent to each other in the width direction of the conveyor 31.
The 12 positions are arranged in a staggered manner (so-called staggered arrangement), making it suitable for carrying small items.

As a method of conveying the conveyed article by the conveyor 31, a method of causing the conveyed article to be self-propelled by forming an inclination on the conveyor 31, or a self-propelled article conveyed by inertia emitted from another drive conveyor or chute, etc. There is a way to do it.

Further, the wheel 12 is a wheel frame 13
It can be easily replaced by pushing it up from below. Similarly, the wheel unit 11 includes the lateral joint member 33.
It can be easily replaced by pushing it up from underneath a and 33b.

Further, the wheel unit 11 can arbitrarily set the pitch of the wheels 12 by changing the mounting position of the wheels 12 with respect to the wheel frame 13.

Next, FIG. 8 shows a second embodiment.

In this embodiment, a wheel frame 13 of the same type is used as the wheel unit 11, and every other wheel frame is placed in the wheel storage recess 20 of the wheel frame 13.
Attach 12 When the conveyor 31 is configured by using the wheel units 11, the wheel frames 13 of the plurality of wheel units 11 are arranged in parallel between the conveyor frames 32 on both sides, and the positions of the wheels 12 of the adjacent wheel units 11 are staggered. Are arranged in a so-called staggered arrangement.

In this embodiment, the wheel accommodating recesses 20 of the respective wheel units 11 can be arranged in parallel, and if the wheels 12 are arranged in a staggered manner, it is a little larger than the first embodiment shown in FIG. Suitable for transporting transported objects and also wheels
By reducing the number of the wheels 12, the wheel 12 can be easily assembled and can be constructed at low cost.

Next, FIGS. 9 to 11 show a third embodiment.

The conveyor 31 of this embodiment comprises a plurality of conveyor frames 52 mounted in parallel on a substrate 51,
A plurality of horizontal joint members 53 are provided between the adjacent conveyor frames 52.
And a plurality of wheel units 11 are attached in parallel between adjacent conveyor frames 52, and the wheel units 11 are also attached to the conveyor frame 52 itself.

The conveyor frame 52 is made of, for example, aluminum and is formed by extrusion molding. A frame fitting recess 54 for fitting the wheel unit 11 is formed on the upper surface and a groove 55 is formed on the side surface along the longitudinal direction. A dovetail-shaped mounting groove 56 is formed on the lower surface. Frame fitting recess
Protrusions with a roughly triangular cross section near the upper edges of both inner wall surfaces of 54
57 is formed along the longitudinal direction.

Then, in order to assemble the conveyor 31, the conveyor frames 52 are fixed in parallel on the substrate 51, and the end portions of the transverse joint members 53 are fitted and installed in the groove portions 55 between the adjacent conveyor frames 52. . The conveyor frame 52 is fixed by inserting a nut into the mounting groove 56 of the conveyor frame 52 and screwing the bolt through the board 51 into the nut to fix the conveyor frame 52.

Two types of wheel units 11 are used: a long wheel unit 11 having a large number of wheels 12 and a short wheel unit 11 having a small number of wheels 12. The fitting grooves 22 of these wheel units 11 are aligned with the horizontal joint members 53, and the wheel units 11 are pushed in from above to fit the respective fitting grooves 22 into the horizontal joint members 53. Thereby, the holding piece portions 24 on both sides of each fitting groove 22 are fitted to the lateral joint member 53,
The wheel unit 11 is held by the horizontal joint member 53. In this way, the plurality of wheel units 11 are assembled and arranged side by side between the conveyor frames 52 on both sides.

Since the horizontal joint member 53 is movable when the wheel unit 11 is assembled, even if the pitch of both fitting grooves 22 of the wheel unit 11 and the pitch of the horizontal joint member 53 are deviated, This can be dealt with by moving the member 53. Further, the pitch error of both fitting grooves 22 of each wheel unit 11 assembled to the lateral joint member 53 can be dealt with by elastic deformation of the holding piece portion 24. Further, the spring 40 may be used to hold the wheel unit 11 on the lateral joint member 53.

Further, the wheel frame 13 of the wheel unit 11 is pushed in from above the wheel fitting recess 54 of the conveyor frame 52 to be fitted therein. As a result, as shown in FIG. 11, the projections 25 projecting from two positions on the side surface of the wheel frame 13 are engaged with the projections 57 of the conveyor frame 52, and the wheel unit 11 is retained and locked to the conveyor frame 52. To be done.

Further, a tapping screw may be screwed into the through hole 26 of the wheel frame 13 from the side portion of the conveyor frame 52 to fix the wheel frame 13 to the conveyor frame 52.

In the conveyor 31 constructed as described above,
As shown in FIG. 9 and FIG. 10, since the transport surface is configured by a plurality of wheel units 11 each having a wheel 12 with a small diameter, even if the transported product is a small product, it is less likely to fall between the wheels 12 and can be used for the transportation of a small product. .

Particularly, in this conveyor 31, the positions of the wheels 12 of the wheel units 11 adjacent to each other in the width direction of the conveyor 31 are arranged in a staggered manner (so-called staggered arrangement), which is suitable for carrying small articles. Moreover, since the wheel unit 11 is also mounted on the conveyor frame 52, even if a plurality of conveyor frames 52 are arranged side by side and arranged in multiple rows in the width direction orthogonal to the conveying direction, they are conveyed on the conveyor frame 52. There is no space that cannot be done,
The entire surface can be effectively used as a transport surface.

Next, FIGS. 12 and 13 show a fourth embodiment.

In the conveyor 31 of this embodiment, the wheels 12
Using a wheel unit 11 rotatably supported along the longitudinal direction of the wheel frame 13 and a wheel unit 11a in which the wheel 12 is rotatably supported in a direction orthogonal to the longitudinal direction of the wheel frame 13. There is.

In the wheel unit 11a, a bearing groove 21 is formed in the end plate portion 17 and the partition plate portion 19, and the shaft portion 15 of the wheel 12 is fitted into the bearing groove 21 so that the wheel 12 can move in the longitudinal direction of the wheel frame 13. It is rotatably supported in the direction orthogonal to the direction.

The wheel units 11 are arranged side by side in one widthwise area from the central conveyor frame 52 of the conveyor 31, and the wheel units 11a are arranged in parallel in the other side area.

In the conveyor 31 thus constructed, it is possible to carry in or carry out a conveyed product from a direction orthogonal to the longitudinal direction of the conveyor frame 52 and carry the conveyed product along the longitudinal direction of the conveyor frame 52. . That is, the transported object is placed on the wheel unit 11a on the other side of the conveyor 31, and is loaded onto the wheel unit 11 on one side of the conveyor 31 by the wheel unit 11a. It can be transported along the longitudinal direction. In addition, the object conveyed along the longitudinal direction of the conveyor frame 52 by the wheel unit 11 is transferred from the wheel unit 11 to the wheel unit 11a, and the wheel unit 11a conveys the object.
31 can be paid to the other side.

Next, FIG. 14 shows a fifth embodiment.

In this embodiment, the distance from each end of the wheel frame 13 to the position of each fitting groove 22 is long on one side and short on the other side. When the wheels 12 are arranged in a staggered manner as shown in FIG. 6, the wheels 12 can be arranged in a staggered manner by alternately arranging the wheel frames 13 in opposite directions. In addition, when the wheel storage recesses 20 are arranged in parallel as shown in FIG. 8, the wheel storage recesses 20 can be arranged by arranging the wheel frames 13 so that the directions of both ends thereof are the same.
Can be arranged in parallel.

Next, FIG. 15 shows a sixth embodiment.

In the conveyor 31 of this embodiment, a plurality of substrates are
A plurality of conveyor frames 52 are arranged side by side on a space 51, and the wheel units 11 are attached to the conveyor frames 52.

The conveyor 31 is suitable for carrying pallets, cases, etc., has a simple structure, and can be constructed at low cost.

Next, FIG. 16 shows a seventh embodiment.

The conveyor 31 of this embodiment includes substrates 51 whose both ends are bent obliquely upward by approximately 45 °, conveyor frames 52 are attached to both ends of the substrate 51, and the wheel units 11 are attached to the respective conveyor frames 52. Is attached.

In this conveyor 31, the wheel units 11 on both sides are arranged at an angle of approximately 90 °, and can convey a circular cross section A such as a can as a conveyed product.

Next, FIG. 17 shows an eighth embodiment.

In this embodiment, the wheel unit 11 is used as the side guide of the roller conveyor 61. The roller conveyor 61 includes frames 62 on both sides, and a plurality of rollers 63 are rotatably supported between the frames 62 on both sides. A support plate 64 is erected on the side surface of the frame 62, the conveyor frame 52 is attached to the support plate 64, and the wheel unit 11 is attached to the conveyor frame 52.

Then, the wheel unit 11 can regulate the side surface position of the conveyed object conveyed on the roller 63.

Next, FIG. 18 shows a ninth embodiment.

The conveyor 31 of this embodiment is constructed by combining the wheel frames 13 of the wheel unit 11 into a substantially triangular shape.

Then, for example, the conveyor 31 is disposed between the first conveyor 71 and the second conveyor 72 which joins the side portion of the first conveyor 71, and the first conveyor 71 and the second conveyor 72 are connected to each other. The transfer of the transported object to the conveyor 71 is performed by the conveyor 31. In this way, the conveyor 31 can be used for 45 ° merging or branching.

[0073]

According to the wheel unit of the first aspect of the invention, the wheel is housed in a plurality of wheel housing recesses formed along the longitudinal direction of the wheel frame, and
Since the shaft portion of the wheel is rotatably supported by the bearing groove formed in the edge portion of the wheel accommodating concave portion, it can be constructed in a small size, has a simple structure, and is easy to assemble, and is capable of carrying small objects.

According to the conveyor of the second aspect, the wheel units of the first aspect are arranged side by side to form the conveying surface, so that even small articles can be conveyed.

According to the conveyor of claim 3, in addition to the effect of the conveyor of claim 2, since the wheel unit can be fitted and mounted in the frame fitting recess of the conveyor frame, the conveyor frame is also effective as a carrying surface. Available for

According to the conveyor of claim 4, in addition to the effect of the conveyor of claim 2 or 3, the wheel unit in which the wheel is rotatably supported along the longitudinal direction of the wheel frame, and the wheel are Since the wheel unit is rotatably supported in the direction orthogonal to the longitudinal direction of the wheel frame, the conveyed objects can be conveyed in the orthogonal direction, and the conveyed objects can be joined and branched.

According to the conveyor of claim 5, in addition to the effect of the conveyor according to any one of claims 2 to 4, by fitting the fitting portion of the wheel unit to the transverse joint member on the conveyor frame side, Since the horizontal joint member can be easily attached and can be slid along the groove portion of the conveyor frame, it is possible to cope with the displacement of the fitting portion of the wheel unit.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wheel unit in an exploded state showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing an assembled state of the wheel unit according to the embodiment.

FIG. 3 is a side view of the wheel frame of the above embodiment.

FIG. 4 is a front view of a conveyor using the wheel unit according to the above embodiment.

FIG. 5 is a perspective view showing a disassembled state of the conveyor according to the above embodiment.

FIG. 6 is a perspective view of the assembled state of the conveyor according to the above embodiment.

FIG. 7 is an end view of the lateral joint member according to the above embodiment.

FIG. 8 is a perspective view of a conveyor showing a second embodiment of the present invention.

FIG. 9 is a front view of a conveyor showing a third embodiment of the present invention.

FIG. 10 is a plan view of the conveyor according to the above embodiment.

FIG. 11 is an enlarged front view of the conveyor frame of the conveyor according to the above embodiment.

FIG. 12 is a front view of a conveyor showing a fourth embodiment of the present invention.

FIG. 13 is a plan view of the conveyor according to the above embodiment.

FIG. 14 is a side view of a conveyor unit showing a fifth embodiment of the present invention.

FIG. 15 is a perspective view of a conveyor showing a sixth embodiment of the present invention.

FIG. 16 is a front view of a conveyor showing a seventh embodiment of the present invention.

FIG. 17 is a front view of a conveyor showing an eighth embodiment of the present invention.

FIG. 18 is a perspective view of a conveyor showing a ninth embodiment of the present invention.

[Explanation of symbols]

 11, 11a Wheel unit 12 Wheel 13 Wheel frame 14 Roller part 15 Shaft part 20 Wheel storage recess 21 Bearing groove 22 Fitting groove as fitting part 31 Conveyor 32 Conveyor frames 33a, 33b Horizontal joint member 34 Groove 52 Conveyor frame 54 Wheel Mating recess 55 Groove

Claims (5)

[Claims] 1. A wheel having a roller portion and shaft portions projecting from both ends of the roller portion, and a plurality of wheels formed in an elongated shape, the wheels being rotatably fitted along the longitudinal direction thereof. And a wheel frame in which a bearing groove is formed at the edge of each wheel storage recess, and a bearing groove for rotatably supporting the shaft of the wheel is formed. A wheel unit to do. 2. A conveyor frame on both sides, a plurality of horizontal joint members connecting the conveyor frames on both sides, and a plurality of side-by-side conveyor frames arranged in parallel between the conveyor frames on both sides and mounted on the horizontal joint member. And a wheel unit of. 3. The conveyor according to claim 2, wherein the upper surface of the conveyor frame has a frame fitting recess into which the wheel frame of the wheel unit is fitted. 4. A wheel unit in which a wheel is rotatably supported along the longitudinal direction of a wheel frame, and a wheel unit in which the wheel is rotatably supported in a direction orthogonal to the longitudinal direction of the wheel frame. The conveyor according to claim 2 or 3, characterized in that. 5. A wheel frame of a wheel unit is provided with a plurality of fitting portions for fitting with a lateral joint member, and a groove portion along which the end portion of the lateral joint member is slidably fitted is provided inside the conveyor frame along the longitudinal direction. The conveyor according to any one of claims 2 to 4, characterized in that the conveyor is provided as follows.