Conveying device

Abstract

To provide a conveying device that is easy to assemble.SOLUTION: A conveying device includes a plurality of conveying rollers 8 and a frame 6 that supports the conveying rollers 8, and a power transmission member 7 is provided between any two of the conveying rollers. The transport roller 8 has a mounting shaft 20, and the frame 6 has a support portion, and the transport roller is mounted on the frame 6 with the mounting shaft 20 disposed on the support portion. The frame 6 has guide portions 40 and 41 connected to the support portion.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a conveying device for conveying an object, and more particularly to a conveying device having a plurality of conveying rollers. [Background technology]

[0002] A conveying device called a roller conveyor is known. A typical roller conveyor has a pair of parallel-arranged left and right frame pieces, between which a plurality of conveying rollers for conveying an object are supported at predetermined intervals in the conveying direction. In roller conveyors, several conveying rollers are often rotated by power to move the conveyed object. In the roller conveyor disclosed in Patent Document 1, one of the transport rollers is a motorized roller that incorporates a drive motor, and the other transport rollers are idling rollers. In the roller conveyor disclosed in Patent Document 1, a power transmission belt is wound between adjacent conveying rollers, and a rotational force is transmitted between the adjacent conveying rollers. In Patent Document 1, all of the conveying rollers are engaged with a power transmission belt, and the rotational force of one motorized roller is transmitted to all of the conveying rollers, causing all of the conveying rollers to rotate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-210100 Summary of the Invention [Problem to be solved by the invention]

[0004] As described above, the conventional conveying device has a power transmission belt (hereinafter simply referred to as the belt) wound between adjacent conveying rollers, transmitting torque between the adjacent conveying rollers. The belt is a frictional transmission, and there is slippage. Therefore, in the relationship between a pair of conveying rollers, a speed difference occurs between the rotation of the driving roller and the rotation of the driven roller. Of course, a speed difference between the conveying rollers is not desirable.

[0005] Generally, when the belt tension is weak, there is a lot of slippage, and when the belt tension is strong, there is little slippage. Therefore, in order to reduce belt slippage, the belt is sometimes wound with high tension. In this case, a belt with a structure that can withstand high tension is selected. For example, round belts do not have a core wire and therefore cannot withstand high tension. In contrast, V-ribbed belts, for example, have a core wire, have a low elongation rate, and can withstand high tension. In other words, V-ribbed belts are less likely to elongate even when subjected to a pulling force. V-ribbed belts can be wound with high tension, resulting in high power transmission efficiency. On the other hand, V-ribbed belts are not easily stretched, making them difficult to wind around pulleys with short center-to-center distances. As a result, conveyor devices that use belts that are not easily stretched are difficult to assemble. SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned problems of the prior art and to provide a conveying device that is easy to assemble. [Means for solving the problem]

[0006] An aspect for solving the above-mentioned problem is a conveying device having a plurality of conveying rollers and a frame supporting the conveying rollers, with a power transmission member provided between any of the conveying rollers, wherein the conveying rollers have mounting shafts, the frame has support parts, and the conveying rollers are attached to the frame with the mounting shafts positioned on the support parts, characterized in that the frame has a guide part connected to the support parts.

[0007] In the conveying device of this aspect, a power transmission member is provided between any of the conveying rollers, and a rotational force is transmitted by the power transmission member. In the conveying device of this aspect, the conveying rollers have mounting shafts, and the frame has support parts. The conveying rollers are mounted to the frame with the mounting shafts engaged with the support parts. That is, in the conveying device of this aspect, the appropriate distance between the conveying rollers is achieved when the mounting shafts of the conveying rollers are positioned in the corresponding support parts of the frame. In the conveying device of this aspect, the frame has guide portions connected to the support portions. Therefore, in the conveying device of this aspect, the mounting shafts of the conveying rollers can be temporarily placed in the guide portions before reaching the corresponding support portions. Then, the mounting shafts of any of the conveying rollers can be engaged with the corresponding support portions to prevent lateral movement of the conveying roller, and the mounting shafts of the other conveying rollers can be pushed into the corresponding support portions.

[0008] In the above aspect, it is desirable that the guide portion is a hole or a groove having a horizontal component.

[0009] According to this aspect, the mounting shaft of the transport roller can be engaged with the guide portion, and the mounting shaft can be moved along the guide portion to be guided to the support portion.

[0010] In each of the above aspects, it is desirable to have a front guide portion provided on one side in the conveying direction with the support portion as the center, and a rear guide portion provided on the other side in the conveying direction.

[0011] According to this aspect, there is a high degree of freedom in temporarily placing the mounting shaft when attaching the transport roller to the frame.

[0012] In each of the above-mentioned aspects, it is desirable that the frame has a through hole that constitutes the guide portion and the support portion, and that the through hole has a horizontal hole portion that has a horizontal component that constitutes the guide portion and extends in the conveying direction, and a vertical hole portion that extends downward from a part of the horizontal hole portion, and that the vertical hole portion functions as the support portion.

[0013] According to this aspect, there is a high degree of freedom in temporarily placing the mounting shaft when attaching the transport roller to the frame.

[0014] In each of the above-described aspects, the power transmission member is preferably a power transmission belt having a core wire.

[0015] Power transmission belts with core wires can withstand high tension, allowing for strong tension and reducing slippage.

[0016] In each of the above-mentioned aspects, the conveying roller has a conveying section that contributes to the conveying of the material to be conveyed and a power transmission area in which a pulley is provided, the power transmission member is a power transmission belt that is wound between the pulleys of one of the conveying rollers, and there is a cover member that covers the power transmission area of ​​the multiple conveying rollers, and the cover member has a top surface portion that covers the top of the power transmission area and a vertical wall portion hanging down from the top surface portion, and it is desirable that the vertical wall portion has a notch that can fit part of the conveying roller.

[0017] The conveying device of this aspect is highly safe, preventing fingers from getting caught in the pulleys and power transmission belts, and is also expected to be effective in preventing the conveying rollers from lifting up. [Effects of the Invention]

[0018] The transport device of the present invention is easy to assemble. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a perspective view of a transport device according to an embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the conveying device of FIG. [Figure 3] (a) is an oblique view of one of the frame pieces observed from the outside, (b) is an oblique view of the frame piece observed from the inside, (c) is a front view of the mounting hole, and (d) is a front view showing the state in which the mounting shaft of the conveying roller is engaged with the mounting hole. [Figure 4] (a) is an oblique view of the other frame piece observed from the outside, (b) is an oblique view of the frame piece observed from the inside, (c) is a front view of the mounting hole, and (d) is a front view showing the state in which the mounting shaft of the conveying roller is engaged with the mounting hole. [Figure 5] 1A is a perspective view of the cover member observed from the outside, and FIG. 1B is a perspective view of the cover member observed from the inside. [Figure 6] 1A is a cross-sectional view of a motorized roller, which is one of the conveying rollers, and a front view of the mounting shaft, and FIG. 1B is a cross-sectional view of an idling roller, which is one of the conveying rollers, and a front view of the mounting shaft. [Figure 7] 1. FIG. 4 is an explanatory view showing the assembly procedure of the conveying device of FIG. 1, illustrating the step of attaching the conveying roller to the frame. [Figure 8] 8 shows a step following FIG. 7 in which the conveying roller is attached to the frame, (a) is a perspective view of the conveying device during this step, and (b) is an explanatory diagram showing the relationship between the mounting holes provided in the frame pieces, the mounting shafts of the conveying rollers, and the power transmission belt during this step. [Figure 9] 9 shows a step following FIG. 8 in which the conveying roller is attached to the frame, (a) is a perspective view of the conveying device during this step, and (b) is an explanatory diagram showing the relationship between the mounting holes provided in the frame pieces, the mounting shafts of the conveying rollers, and the power transmission belt during this step. [Figure 10] 10 shows a step following FIG. 9 in which the conveying roller is attached to the frame, (a) is a perspective view of the conveying device during this step, and (b) is an explanatory diagram showing the relationship between the mounting holes provided in the frame pieces, the mounting shafts of the conveying rollers, and the power transmission belt during this step. [Figure 11] 10 shows a process following that of attaching the conveying roller to the frame, where (a) is a perspective view of the conveying device during this process, and (b) is an explanatory diagram showing the relationship between the mounting holes provided in the frame pieces, the mounting shafts of the conveying rollers, and the power transmission belt during this process. [Figure 12]1. (a) and (b) are explanatory views showing the assembly procedure of the conveying device of FIG. 1, illustrating the step of attaching the cover member to the frame. [Figure 13] 10(a) to 10(f) are front views showing modified examples of the support portion and the guide portion provided on the frame. [Figure 14] 1(a) is an exploded perspective view of a conveying device according to another embodiment of the present invention, and FIG. 1(b) is a side view thereof. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an embodiment of the present invention will be described. The conveying device 1 of this embodiment is a short roller conveyor known as a zone conveyor, and has a frame 6 with a pair of left and right frame pieces 3 and 5 arranged in parallel, with multiple conveying rollers 8 journaled at predetermined intervals between the frame pieces 3 and 5. In the conveying device 1 of this embodiment, a power transmission belt (power transmission member) 7 is wound around adjacent conveying rollers 8. In addition, in the conveying device 1 of this embodiment, a power transmission area 15 of the multiple conveying rollers 8 is covered with a cover member 13. A plurality of conveying devices 1 of this embodiment are connected to form a continuous conveying line. The conveying direction of the conveying device 1 is arbitrary, but for convenience of explanation, it is assumed that the conveying direction is the direction of the arrow in FIG. The following will explain each step in turn.

[0021] The conveying roller 8 has a conveying region 11 formed by a cylindrical roller body 10 and a power transmission region 15 in which a pulley 12 is provided. This embodiment employs a double pulley 12. That is, the pulley 12 has two rows of grooves for winding the power transmission belt 7 (hereinafter simply referred to as the belt 7). The pulley 12 is integrally connected to the roller body 10, and the two rotate integrally. In the conveying device 1 of this embodiment, one of the conveying rollers 8 is a motor-integrated roller incorporating a motor 16 and a reducer 17 as shown in Figure 6(a), and the others are idling rollers as shown in Figure 6(b).

[0022] 6(a) and 6(b), the transport roller 8 has attachment shafts 20 and 21 protruding from both ends. The cross-sectional shape of the attachment shafts 20 and 21 is hexagonal as shown in FIG. In this embodiment, the mounting shaft 20 protruding toward the pulley 12 can move in and out. That is, the mounting shaft 20 on the pulley 12 side is slidably supported by the pulley 12 and the roller body 10. As shown in Figure 6, a spring 23 is provided inside the roller body 10, and the mounting shaft 20 is constantly biased outward by the spring 23. Therefore, the mounting shaft 20 on the pulley 12 side always protrudes from the pulley 12 side, but can be retracted into the pulley 12 by being pushed with a finger or the like.

[0023] As described above, the frame 6 has two frame pieces 3 and 5. The two frame pieces 3 and 5 are arranged in parallel and connected by a connecting member (not shown). One of the frame pieces 3 is a member that supports the mounting shaft 20 on the pulley 12 side of the conveying roller 8, and as shown in Figure 3, a vertical wall portion 22 is provided with a plurality of mounting holes 30 through which the mounting shaft 20 is inserted. All of the mounting holes 30 pass through the vertical wall portion 22.

[0024] The mounting holes 30 are generally "T" shaped except for the two ends. That is, the mounting hole 30 employed in this embodiment has a horizontal hole portion 31 extending in the longitudinal direction of the frame piece 3 and a vertical hole portion 32 extending downward from the center of the horizontal hole portion 31. The shape of the horizontal hole 31 is an elongated hole. That is, both the front and rear ends of the horizontal hole 31 are semicircular, and the shape is such that the semicircular portions are connected by a straight line. The width of the horizontal hole 31 is slightly wider than the width W of the mounting shaft 20. It can be said that the horizontal hole 31 extends in the direction in which the transported object is transported.

[0025] In contrast, the vertical hole portion 32 of the mounting hole 30 has an engagement shape that engages with the mounting shaft 20 so that it cannot rotate. That is, the vertical hole portion 32 has inclined portions 35 and 36 at the bottom corners. The width of the vertical hole portion 32 is also approximately equal to the width W of the mounting shaft 20 shown in Figure 6. Therefore, the mounting shaft 20 engages with the vertical hole portion 32 of the mounting hole 30 and is held in the frame piece 3 so that it cannot rotate. In this embodiment, the lower end region of the vertical hole portion 32 functions as a support portion 33 that supports the mounting shaft 20 of the conveying roller 8.

[0026] In this embodiment, the horizontal hole 31 functions as a guide portion that connects to the support portion 33. In this embodiment, the horizontal hole (guide portion) 31 is linear and has only a horizontal component. Therefore, when the mounting shaft 20 of the conveying roller 8 is inserted into the horizontal hole 31, the mounting shaft 20 has a degree of freedom only in the horizontal direction, and has no degree of freedom in the up-down direction. On the other hand, the vertical hole 32 is linear and has only a vertical component. Therefore, when the mounting shaft 20 of the conveying roller 8 is inserted into the vertical hole 32, the mounting shaft 20 has a degree of freedom only in the up and down direction, and is prevented from moving in the horizontal direction. In this embodiment, the upper end of the vertical hole 32 is located at the longitudinal center of the horizontal hole 31. Therefore, in front of the area where the vertical hole 32 is connected, there is a front guide section 40 formed by the front side of the horizontal hole 31 in the conveying direction. In addition, behind the area where the vertical hole 32 is connected, there is a rear guide section 41 formed by the rear side of the horizontal hole 31 in the conveying direction.

[0027] The mounting hole 30f at one longitudinal end of the frame piece 3 is inverted "L" shape and is composed of a vertical hole portion 32 and a rear guide portion 41. The mounting hole 30e at the other longitudinal end of the frame piece 3 is inverted "L" shape and is composed of a vertical hole portion 32 and a front guide portion 40. In short, the guide portions of the mounting holes 30f, 30e at both ends extend in directions that face each other. The frame piece 3 is provided with an attachment hole 48 for attaching the cover member 13.

[0028] The other frame piece 5 is a member that supports the mounting shaft 21 on the other end side of the conveying roller 8, and as shown in FIG. 4, a plurality of mounting holes 38 through which the mounting shafts 21 are inserted are provided in the vertical wall portion 25. The mounting holes 38 are hexagonal in shape. In this embodiment, the mounting holes 38 function as a support portion that supports the mounting shaft 21 of the conveying roller 8.

[0029] The belt 7 is a V-ribbed belt. A V-ribbed belt is a power transmission belt with multiple continuous ribs in the circumferential direction. Made of rubber or resin, a V-ribbed belt contains a core wire (not shown) made of rope or wire. Because of its core wire, a V-ribbed belt has a low elongation rate and can withstand high tension. In other words, a V-ribbed belt does not easily elongate even when subjected to a pulling force. Because a V-ribbed belt can be wound with high tension, it has high power transmission efficiency. On the other hand, it is not easy to wind a V-ribbed belt around a pulley with a short center distance.

[0030] 5, the cover member 13 has a generally U-shaped cross section and includes an inner vertical wall portion 42, an outer vertical wall portion 43, and a top surface portion 45 connecting the two. The top surface portion 45 of the cover member 13 is a member that covers the top of the power transmission area, and the inner vertical wall portion 42 and the outer vertical wall portion 43 hang down from the top surface portion 45. The inner vertical wall portion 42 is provided with a plurality of large arc-shaped cutouts 46 into which the ends of the roller bodies 10 of the conveying rollers 8 are inserted. The outer vertical wall portion 43 is provided with a plurality of small arc-shaped cutouts 47 into which the mounting shafts 21 of the conveying rollers 8 are inserted. Further, the outer vertical wall portion 43 of the cover member 13 is provided with screw holes 50 for mounting.

[0031] As described above, the conveying device 1 of this embodiment has a plurality of conveying rollers 8 axially supported at predetermined intervals between the frame pieces 3 and 5. That is, the mounting shaft 20 on the pulley 12 side is inserted into the mounting hole 30 of one of the frame pieces 3, and the mounting shaft 20 is further disposed in the vertical hole portion 32 (support portion 33) of the mounting hole 30. The other mounting shaft 21 is inserted into the mounting hole (support portion) 38 of the other frame piece 5, and the mounting shaft 21 is engaged with the mounting hole (support portion) 38. A belt 7 is wound between the pulleys 12 of adjacent conveying rollers 8, and the rotational force of one motor-integrated roller (conveying roller 8) is transmitted to the other idling rollers (conveying rollers 8), causing all (conveying rollers 8) to rotate.

[0032] The cover member 13 is attached to the inside of the frame piece 3 with screws (not shown). The top surface 45 of the cover member 13 covers the pulleys 12 of the conveying rollers 8 and the belt 7 in a transverse direction.

[0033] Next, the assembly procedure of the conveying device 1 will be described with reference to FIGS. As a first step, as shown in Figure 7, the belt 7 is wound between the pulleys 12 of each conveying roller 8. That is, before attaching each conveying roller 8 to the frame 6, the belt 7 is wound between the pulleys 12 of the adjacent conveying rollers 8 on the outside. Of course, no tension is applied to the belt 7. The belt 7 is simply wound between the pulleys 12. That is, the belt 7 is slack. The group of conveying rollers 8 in this state are engaged with the frame piece 5. That is, the mounting shaft 21 of each conveying roller 8 is inserted into the mounting hole (support portion) 38 of the frame piece 5.

[0034] 8, the mounting shaft 20a of one of the conveying rollers 8a and the mounting shaft 20b of the adjacent conveying roller 8b are inserted into the corresponding mounting holes 30a, 30b of the frame piece 3. Note that the conveying roller 8 used in this embodiment has a mounting shaft 20 that can be retracted, so with the mounting shaft 20 retracted into the roller body 10, the pulley 12 side of the conveying roller 8 is inserted inside the frame piece 3, and the mounting shaft 20 is then protruded and inserted into the mounting holes 30a, 30b.

[0035] Even in this state, no tension is applied to the belt 7, and the belt 7 is simply wound around the pulleys 12. That is, the belt 7 is loose, as shown in Figure 8. However, the distance between the conveying rollers 8a and 8b is regulated by the belt 7. Therefore, as shown in Figure 8, the mounting shaft 20a of one of the conveying rollers 8a is located, for example, in the rear guide portion 41 of the mounting hole 30a, and the mounting shaft 20b of the other conveying roller 8b is located, for example, in the front guide portion 40 of the mounting hole 30b. The mounting shaft 20a of the conveying roller 8a and the mounting shaft 20b of the adjacent conveying roller 8b are temporarily placed in the rear guide portion 41 of the mounting hole 30a and the front guide portion 40 of the mounting shaft 20b. As mentioned above, the belt 7 is still loose.

[0036] Here, if the mounting shaft 20a of one conveying roller 8a is engaged with the vertical hole portion 32a (support portion 33) of the mounting hole 30a and the mounting shaft 20b of the other conveying roller 8b is engaged with the vertical hole portion 32b (support portion 33) of the mounting hole 30b, the spacing between adjacent conveying rollers 8a and 8b will be appropriate and the belt 7 will be tensioned. In contrast, when the mounting shafts 20a, 20b of the conveying rollers 8a, 8b are temporarily placed in the horizontal hole portion (guide portion) 31 as shown in Figure 8, the mounting shaft 20a of one of the conveying rollers 8a is in the rear guide portion 41 of the mounting hole 30a, and the mounting shaft 20b of the other conveying roller 8b is in the front guide portion 40 of the mounting hole 30b, so the distance between the axes of the conveying rollers 8a, 8b is shorter than the normal distance and the belt 7 is in a slack state.

[0037] Next, as shown in Fig. 9, the mounting shaft 20a of one of the conveying rollers 8a is pushed into and engaged with the vertical hole portion 32a (support portion 33) of the corresponding mounting hole 30a. Because the mounting shaft 20a of one of the conveying rollers 8a is engaged with the horizontal hole portion (guiding portion) 31, the mounting shaft 20a can be moved along the horizontal hole portion 31 and pushed into the vertical hole portion 32a (support portion 33). At this time, the other conveying roller 8b is connected to one of the conveying rollers 8a by the belt 7, so it is drawn toward the one of the conveying rollers 8a and moves toward the front end of the front guide section 40, as shown in Figure 9. At this time, the distance between the axes of the adjacent conveying rollers 8a and 8b is shorter than the normal distance, and the belt 7 remains loose, as shown in Figure 9.

[0038] Next, as shown in Figure 10, a lateral external force is applied to the other conveying roller 8b, moving it in a direction away from the one conveying roller 8a, and moving the mounting shaft 20b of the other conveying roller 8b to the opening end of the vertical hole portion 32b (support portion 33) of the corresponding mounting hole 30b. At this time, one of the conveying rollers 8a does not move horizontally because the mounting shaft 20a is engaged with the vertical hole portion 32a (support portion 33) of the corresponding mounting hole 30a. Therefore, the worker only needs to push the conveying roller 8b horizontally.

[0039] Since the mounting shaft 20b of the conveying roller 8b is engaged with the front guide portion 40 extending horizontally, the mounting shaft 20b of the conveying roller 8b moves horizontally without moving up and down and reaches the opening end of the vertical hole portion 32b (support portion 33). 11, the other conveying roller 8b is pushed downward, and the mounting shaft 20b of the other conveying roller 8b is pushed into the vertical hole portion 32b (support portion 33) of the corresponding mounting hole 30b. As a result, the distance between the two adjacent conveying rollers 8a and 8b becomes appropriate, and an appropriate tension is applied to the belt 7. In other words, the belt 7 is in a tensioned state.

[0040] This operation is repeated in order, and the mounting shafts 20 of all the conveying rollers 8 are pushed into the vertical hole portions 32 (support portions 33) of the corresponding mounting holes 30. After all the conveying rollers 8 have been attached, the cover member 13 is attached as shown in FIG. In the conveying device 1 of this embodiment, the mounting shaft 20a of one of the conveying rollers 8a is engaged with the vertical hole portion 32a (support portion 33) of the mounting hole 30a to prevent lateral movement, and in this state the mounting shaft 20b of the adjacent conveying roller 8b is moved along the horizontal hole portion (guiding portion) 31, thereby tensioning the belt 7. This makes tensioning the belt 7 easy and assembly is easy.

[0041] In the embodiment described above, the mounting holes 30f and 30e at both ends are shaped like an inverted "L" as shown in Figure 13(a) and all the others are shaped like the letter "T", but all the mounting holes 30 may have the same shape. For example, all the mounting holes 30 may be shaped like the letter "T". Furthermore, the mounting hole 30 is not limited to a "T" shape as long as it has a support portion 33 that supports the mounting shaft so that it does not move in the lateral direction (the conveying direction of the conveyed object) and a guide portion 60 that is connected to the support portion 33. The guide portion 60 is preferably a hole that has a horizontal component. The guide portion 60 may also be an inclined surface as long as it has a horizontal component. For example, the mounting hole 30 may be "Y" shaped as shown in Figure 13(b). The mounting hole 30 may also have an inclined guide portion 60 on only one side of the support portion 33 as shown in Figure 13(c). The mounting hole 30 may also be cross-shaped as shown in Figure 13(d). Furthermore, the mounting hole 30 may be partially open as shown in FIGS. 13(e) and 13(f).

[0042] In the above-described embodiment, a V-ribbed belt is used as a belt having a core wire and having little stretch. Other belts with a core wire and little stretch include toothed belts and V-belts. Toothed belts and V-belts may be used instead of V-ribbed belts. A round belt without a core may also be used.

[0043] The cross-sectional shape of the mounting shafts 20, 21 is arbitrary and is not limited to a hexagon. It is desirable that the mounting shafts 20, 21 have a shape and structure that prevents rotation when mounted on the frame 6.

[0044] In the embodiment described above, both the support portion and the guide portion penetrate the vertical wall portion 22 of the frame piece 3, but the support portion and the guide portion may also be grooves located inside the frame piece 3 and opening toward the opposing frame piece 5.

[0045] In the embodiment described above, the cover member 13 is attached to the frame piece 3. The cover member 13 can cover the pulleys 12 of each conveying roller 8 and the belt 7 across the entire surface, and is effective in preventing accidents in which the user's fingers are pinched between the pulleys 12 and the belt 7. Furthermore, the cover member 13 employed in this embodiment has a plurality of small arc-shaped cutouts 47 formed in the outer vertical wall portion 43. The small cutouts 47 of the cover member 13 are positioned on the mounting shafts 21 of the transport rollers 8, and can prevent the transport rollers 8 from floating up. That is, in this embodiment, the cover member 13 prevents the transport rollers 8 from separating from the frame 6.

[0046] As described above, in this embodiment, the cover member 13 prevents the conveying roller 8 from coming off the frame 6, but other members can also be used to fix the conveying roller 8 to the frame 6. FIG. 14 shows another embodiment of the present invention, in which a separation prevention member 61 is attached to the outer surface of the frame 6 to prevent the conveying roller 8 from separating from the frame 6. The separation prevention member 61 is a flat metal piece, and has a plurality of hexagonal holes 62 into which the mounting shafts 20 of the transport rollers 8 are engaged. The separation prevention member 61 is fixed to the outer surface of the frame piece 3 with a screw 63, with the mounting shaft 20 of the conveying roller 8 inserted into the hole 62. As a result, the mounting shaft 20 of the conveying roller 8 is fixed to the frame piece 3.

[0047] The anti-detachment member 61 shown in Figure 14 has an outer shape of the hole 62 that engages with the mounting shaft 20 of the conveying roller 8, but if the purpose is simply to prevent the conveying roller 8 from detaching from the frame 6, the shape of the hole 62 may be circular. Furthermore, the anti-detachment member 61 does not necessarily have to have a hole; it can prevent the transport roller 8 from detaching from the frame 6 simply by having a portion that abuts against the upper part of the mounting shaft 20 of the transport roller 8. The separation prevention member 61 shown in FIG. 14 may be used in combination with the cover member 13. [Explanation of symbols]

[0048] 1: conveying device, 3: frame piece, 5: frame piece, 6: frame, 7: power transmission belt, 8: conveying roller, 12: pulley, 13: cover member, 15: power transmission area, 20: Mounting shaft, 21: Mounting shaft, 30: Mounting hole, 31: Horizontal hole portion (guiding portion), 32: Vertical hole portion, 33: Support portion, 38: Mounting hole (support portion), 40: Front guide portion, 41: Rear guide part, 42: Inner side vertical wall part, 43: Outer side vertical wall part, 45: Top part, 46: Large notch portion, 60: Guide portion, 61: Separation prevention member

Claims

1. A conveying device having a plurality of conveying rollers and a frame supporting the conveying rollers, with a power transmission member provided between any of the conveying rollers, wherein the conveying rollers have mounting shafts, the frame has support parts, and the conveying rollers are mounted on the frame with the mounting shafts disposed on the support parts; A conveying device characterized in that the frame has a guide portion connected to the support portion.

2. 2. The conveying device according to claim 1, wherein the guide portion is a hole or a groove having a horizontal component.

3. 2. The conveying device according to claim 1, further comprising a front guide portion provided on one side of the support portion in the conveying direction and a rear guide portion provided on the other side of the support portion in the conveying direction.

4. The conveying device described in claim 1, characterized in that the frame has a through hole that constitutes the guide portion and the support portion, and the through hole has a horizontal hole portion that has a horizontal component that constitutes the guide portion and extends in the conveying direction, and a vertical hole portion that extends downward from a part of the horizontal hole portion, and the vertical hole portion functions as the support portion.

5. 2. The conveying device according to claim 1, wherein the power transmission member is a power transmission belt having a core wire.

6. The conveying roller has a conveying section that contributes to conveying the object to be conveyed and a power transmission area in which a pulley is provided, and the power transmission member is a power transmission belt, and the power transmission belt is wound between the pulleys of any of the conveying rollers, The conveying device described in claim 1, characterized in that there is a cover member that covers the power transmission area of ​​multiple conveying rollers, the cover member having a top surface portion that covers above the power transmission area and a vertical wall portion hanging down from the top surface portion, and the vertical wall portion having a notch that can accommodate part of the conveying roller.

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