JP2017114571A - Conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the safety of a conveyor device.SOLUTION: A conveyor device 1 of the invention includes: a roller 20; an endless rotating body 30 having a transport part 33 forming a workpiece transport path and having a rotary part 31 formed by being held on an outer periphery of the roller 20; and a cover 60 which covers the rotary part 31 of the endless rotating body 30. The roller 20 is movable for tension adjustment of the endless rotating body 30, and the cover 60 is configured to move integrally with the roller 20.SELECTED DRAWING: Figure 1B

Description

  The present invention relates to a conveyor device, and more particularly to a conveyor device that allows a roller such as a sprocket to move in order to adjust the tension of an endless rotating body such as an endless chain.

  In this type of conveyor apparatus, as shown in FIG. 10, a sprocket 120 as a roller used for conveying a workpiece is provided at the end of the conveyance path in the conveyor apparatus 101 and held on the outer periphery of the sprocket 120. In some cases, a rotating portion 131 of an endless chain 130 serving as an endless rotating body is covered with a cover 160. The cover 160 is attached to a bracket 140 that holds the center shaft 121 of the sprocket 120, and prevents an operator or the like from accidentally touching the endless chain 130 to be injured. Is provided. Moreover, the conveyor apparatus of patent document 1 is comprised so that a cover may be removed with the pressing force from a foreign material, when a foreign material is wound between a cover and a sprocket.

Japanese Patent No. 5316900

  However, in the conventional conveyor apparatus 101, when the sprocket 120 is moved in a direction parallel to the workpiece conveyance direction in order to adjust the tension of the endless chain 130, the cover 160 attached to the bracket 140 does not move. FIG. 11 shows a case where the sprocket 120 is moved away from the cover 160 from the state of FIG. 10 in order to reduce the tension of the endless chain 130. As shown in FIGS. 10 and 11, the movement of the sprocket 120 changes the size of the space S <b> 1 between the rotating part 131 of the endless chain 130 and the cover 160. As shown in FIG. 11, when the space S1 between the rotating part 131 and the cover 160 is large, a foreign object is caught in the space S1, or an operator or the like accidentally puts a finger, and the conveyor There was a problem with the safety of the device. The conveyor device described in Patent Document 1 has the same problem. Then, an object of this invention is to improve the safety | security of a conveyor apparatus.

The conveyor apparatus according to claim 1 of the present invention has an endless rotating body having a roller and a transport section that forms a transport path of the workpiece, and a rotating section formed by being held on the outer periphery of the roller. And a cover that covers the rotating portion of the endless rotating body, wherein the roller is movable for adjusting the tension of the endless rotating body, and the cover moves integrally with the roller. It is characterized by being configured.
With this configuration, since the cover moves integrally with the roller, the space between the rotating portion of the endless rotating body and the cover can be made constant.

The conveyor device according to a second aspect of the present invention further includes a bracket that holds the roller and the cover in a state where the movement for adjusting the tension is possible, and the bracket includes the rotation of the endless rotating body. It is formed so as to cover the moving part.
With this configuration, the bracket can be moved while holding the roller and the cover, and a portion of the rotating portion that cannot be covered only by the cover can be covered by the bracket.

In the conveyor device according to a third aspect of the present invention, the bracket supports the central axis of the roller, a bearing is provided between the central axis and the roller, and the cover extends the bearing in the thrust direction. It is characterized by having a bearing presser that is pressed and positioned.
With this configuration, the cover can also serve as a bearing retainer, and the number of parts can be reduced.

According to a fourth aspect of the present invention, in the conveyor device according to the present invention, the cover is formed by a pair of cover pieces provided at symmetrical positions sandwiching the roller, and the cover piece is a central axis of the roller. It is characterized in that it is formed symmetrically with respect to a horizontal plane passing through.
With this configuration, the cover can be formed by using the same component with the roller interposed therebetween, and the number of components can be reduced.

The conveyor apparatus according to claim 5 of the present invention is a chain conveyor in which the roller is a sprocket and the endless rotating body is an endless chain, and the cover is a chain support portion that supports a conveying portion of the endless rotating body. It is characterized by having.
With this configuration, there is no need to separately provide parts for preventing the endless chain from being forced into the sprocket, and the number of parts can be reduced.

  According to the conveyor apparatus of the present invention, since the cover and the roller move integrally, the space between the cover and the roller can be made constant. Thereby, since the space between a roller and a cover does not open greatly and it can prevent that a foreign material and a finger are caught in the space, the safety | security of a conveyor apparatus can be improved.

It is a disassembled perspective view which shows the principal part of the conveyor apparatus which concerns on embodiment of this invention. It is a perspective view which shows the principal part of the conveyor apparatus. It is a front view of the conveyor apparatus. It is the principal part front view of the conveyor apparatus, Comprising: It is the figure which drew the bracket with the dashed-two dotted line. It is a principal part front view of the conveyor apparatus. It is a principal part top view of the conveyor apparatus. It is a figure which shows the principal part of the conveyor apparatus, Comprising: It is AAAA sectional drawing in FIG. It is a perspective view which shows the cover and sprocket of the conveyor apparatus. It is a perspective view of the conveyor apparatus. It is a perspective view of the conveyor apparatus. It is a perspective view of the conventional conveyor apparatus. It is a perspective view of the conventional conveyor apparatus.

  As shown in FIGS. 1A and 1B, the conveyor device 1 according to the embodiment of the present invention enables the driven sprocket 20 as a roller to move in order to adjust the tension of the endless chain 30 as an endless rotating body. It is. At this time, the cover 60 covering the rotating portion 31 wound around the driven sprocket 20 in the endless chain 30 also moves integrally with the driven sprocket 20. Specifically, the driven sprocket 20 is configured to be movable in a direction parallel to the transport direction X with respect to the bracket 40 provided at the end of the conveyor device 1, and the cover 60 is also transported with respect to the bracket 40. It is configured to be movable in a direction parallel to the direction X. In FIG. 1B, the bracket 40 is indicated by a two-dot chain line. Hereinafter, each structure of the conveyor apparatus 1 is demonstrated concretely.

  FIG. 2 is a front view showing the entire conveyor apparatus 1. The conveyor device 1 is used to transport the workpiece W in the transport direction X or in the opposite direction. The conveyor device 1 includes a drive sprocket 10 as a roller, a driven sprocket 20 as a roller, an endless chain 30 as an endless rotating body, a bracket 40, a frame 50, and a cover 60 (FIGS. 1A, 1B and 3-8). Reference). These members are each arranged in two or more rows in the depth direction Z to constitute a chain conveyor. The workpiece W is, for example, a conveyed object such as a pallet that is transferred onto the endless chain 30 by a forklift. In addition, the code | symbol Y in drawing shows a height direction.

  The drive sprocket 10 has a drive shaft 12 connected to the drive source 11, and rotates around the drive shaft 12 by the drive source 11. The driven sprocket 20 is connected to the central shaft 21 via a bearing 22 (see FIGS. 5 and 6). The bearing 22 is provided so as to surround the periphery of the central shaft 21, whereby the driven sprocket 20 is rotatable around the central shaft 21. The endless chain 30 is held at a predetermined tension by the drive sprocket 10 and the driven sprocket 20. The endless chain 30 includes rotating parts 31 and 32 and a conveying part 33. The rotating part 31 is a part along the outer periphery of the driven sprocket 20, and the rotating part 32 is a part along the outer periphery of the drive sprocket 10. The conveyance unit 33 is a part that forms a conveyance path for the workpiece W between the two rotation units 31 and 32. The frame 50 supports and holds the transport unit 33 from below so that the endless chain 30 advances straight. A drive sprocket 10 is provided at one end in the transport direction X of the frame 50, and a driven sprocket 20 is provided at the other end in the transport direction X. When the drive sprocket 10 rotates, the endless chain 30 travels along with the rotation, and the driven sprocket 20 also rotates around the central axis 21. As a result, the workpiece W placed on the endless chain 30 can be transported in the transport direction X or in the opposite direction.

  Next, the structure of the cover 60 is demonstrated in detail, referring FIG. 1A, 1B, 3, 5-7. The cover 60 is formed of a plate-like member and covers the rotating part 31 of the endless chain 30, and an operator or the like accidentally puts a finger between the rotating part 31 of the endless chain 30 and the bracket 40 or the like. It is provided in order to prevent injuries such as by putting it in. Here, “covering the rotating part 31” does not cover the entire rotating part 31, but does not cover the upper part of the rotating part 31 of the endless chain 30 to such an extent that the cover 60 does not interfere with workpiece transfer. , Refers to the shape of the notch.

  Further, as shown in FIGS. 5 and 6, the cover 60 is formed by a pair of cover pieces 60 a and 60 b provided at symmetrical positions with the driven sprocket 20 interposed therebetween. That is, the cover piece 60a and the cover piece 60b are formed symmetrically with respect to the driven sprocket 20 in FIG. As shown in FIGS. 3 and 6, the cover pieces 60 a and 60 b are formed vertically symmetrical, that is, symmetrical with respect to a horizontal plane H (XZ plane) passing through the central axis 21. Each of the cover pieces 60a and 60b has a main surface portion 61, a side surface portion 62, a bearing retainer 63 (see FIGS. 6 and 7), and a chain support portion 64.

  The main surface portion 61 of the cover pieces 60a and 60b is a surface perpendicular to the depth direction Z, and a through hole 61a (see FIGS. 1A, 1B, and 7) through which the center shaft 21 of the driven sprocket 20 passes, and the conveyance direction X And a long hole 61b extending. Further, the height of the main surface portion 61 is designed so that the conveyance path of the endless chain 30 is exposed and the main surface portion 61 is located on the inner peripheral side of the endless chain 30.

  The side surface portion 62 of the cover pieces 60a and 60b is a portion formed by bending the main surface portion 61 by 90 degrees on the side where the driven sprocket 20 is positioned in the depth direction Z on the end side of the conveyor device 1 in the transport direction X. . Hereinafter, the side where the driven sprocket 20 is located in the depth direction Z is simply referred to as the inner side. On the contrary, the side opposite to the position of the driven sprocket 20 in the depth direction Z is simply referred to as the outside. The pair of cover pieces 60a and 60b are configured to cover the rotating portion 31 of the endless chain 30 when the end surfaces of the side surface portions 62 come into contact with each other. As described above, the cover pieces 60a and 60b do not cover the upper portion of the rotating portion 31 to the extent that it does not interfere with the conveyance of the workpiece and are formed vertically symmetrical. The upper part and the lower part of 31 are not covered, but the part between the upper part and the lower part of the rotation part 31 in the height direction Y will be covered.

  As shown in FIG. 7, the bearing retainers 63 of the cover pieces 60 a and 60 b are formed so as to rise inward around the through hole 61 a of the main surface portion 61. As shown in FIGS. 5 and 6, the chain support portion 64 of the cover pieces 60 a and 60 b is formed by bending the upper end and the lower end of the main surface portion 61 inward. The chain support part 64 supports the transport part 33 of the endless chain 30 in order to prevent the endless chain 30 from biting into the driven sprocket 20.

  Next, the structure of the bracket 40 will be described with reference to FIGS. 1A and 4 to 7. A pair of brackets 40 are provided at symmetrical positions across the driven sprocket 20 and the pair of cover pieces 60a and 60b. Each bracket 40 is formed of a plate material, and includes a main surface portion 41, an end side edge portion 42, a center side edge portion 43, a side surface portion 44, and a joint portion 45.

  The main surface portion 41 of the bracket 40 has a long hole 41 a (see FIG. 4) that is a surface perpendicular to the depth direction Z and extends in a direction parallel to the transport direction X. By passing the central shaft 21 of the driven sprocket 20 through the elongated hole 41a, the driven sprocket 20 is held in a state of being movable in a direction parallel to the transport direction X. Here, the central shaft 21 has a notch 21b (see FIG. 6) in the radial direction. When the long hole 41a of the bracket 40 is engaged with the notch 21b, the driven sprocket 20 is restricted from moving in the depth direction Z. The height of the main surface portion 41 is designed such that the conveyance path of the endless chain 30 is exposed and the main surface portion 41 is positioned at the conveyance portion 33 of the endless chain 30.

  Further, a projection 41b that engages with a long hole 61b formed in the main surface portion 61 of the cover pieces 60a and 60b is provided inside the main surface portion 41 of the bracket 40. The protrusions 41b of the bracket 40 slide relative to the inside of the long holes 61b of the cover pieces 60a and 60b, so that the cover 60 can move relative to the bracket 40. The long holes 61b of the cover pieces 60, 60b may be provided anywhere on the main surface portion 61, but it is preferable that one is provided near the upper end and the lower end of the main surface portion 61 as shown in FIG. This is because the cover 60 can be easily moved in a direction parallel to the transport direction X. In addition, the dashed-two dotted line part in FIG. 7 shows the state which moved the cover piece 60b to the center side of the conveyor apparatus.

  Further, as shown in FIG. 7, a plurality of through holes 41 c are provided in the main surface portion 41 of the bracket 40. As shown in FIGS. 4 and 5, a pair of brackets 40 are joined to each other by fastening bolts 41d with nuts 41e into any of the through holes 41c. The through hole 41 c is formed below the driven sprocket 20 in the height direction Y. Therefore, even if the bolt 41d is passed through the through hole 41c, the bolt 41d and the driven sprocket 20 do not interfere with each other. Then, the pair of brackets 40 press the pair of cover pieces 60a and 60b from the outside in the depth direction Z, and the bearing holder 63 of the cover pieces 60a and 60b presses the bearing 22 of the driven sprocket 20 in the thrust direction. The driven sprocket 20 and the bearing 22 can be positioned.

  The end portion side edge portion 42 of the bracket 40 is a portion formed by bending the main surface portion 41 outward by 90 degrees on the end portion side of the conveyor device 1 in the transport direction X. The end side edge portion 42 is provided with a through hole 42 a (see FIG. 1A) at the same height as the long hole 41 a of the main surface portion 41. The bolt 42b passes through the through hole 42a of the end side edge 42, and a nut 42c is provided on the opposite side of the head of the bolt 42b across the through hole 42a. Then, the bolt 42 b is inserted into an inner screw hole 21 a (see FIGS. 1B and 6) formed in the central shaft 21 of the driven sprocket 20. By rotating the bolt 42b by loosening the nut 42c, the center shaft 21 of the driven sprocket 20 slides inside the long hole 41a provided in the main surface portion 41 of the bracket 40, and the driven sprocket 20 is moved in the conveying direction X. It can be moved in parallel directions. Thereby, the tension of the endless chain 30 can be adjusted. After completing the tension adjustment, the rotation of the bolt 42b can be restricted by tightening the nut 42c, and the position of the driven sprocket 20 can be fixed. Here, a circular hole 41 f is connected to the long hole 41 a of the bracket 40. When moving the driven sprocket 20 in a direction parallel to the depth direction Z, such as when removing the driven sprocket 20, the center shaft 21 of the driven sprocket 20 is slid to the circular hole 41f. The diameter of the circular hole 41f is formed larger than the diameter of the central shaft 21. Therefore, by sliding the central shaft 21 into the circular hole 41f, the notch 21b of the central shaft 21 and the long hole 41a are disengaged, and the sprocket 20 can be moved in a direction parallel to the depth direction Z. It becomes.

  The central edge portion 43 of the bracket 40 is a portion formed by bending the main surface portion 41 outward or inward by 90 degrees on the central side of the conveyor apparatus 1 in the transport direction X. A plurality of central side edge portions 43 are formed for each bracket 40, and each of the central side edge portions 43 is formed so as to contact the frame 50.

  The side surface portion 44 of the bracket 40 is a portion formed by bending the main surface portion 41 inward by 90 degrees on the end portion side of the conveyor device 1 in the transport direction X. The side surface portion 44 is formed below the end side edge portion 42. In addition, the pair of brackets 40 are configured to cover the lower portion of the rotating portion 31 of the endless chain 30 by joining the side surface portions 44 to each other.

  The joint portion 45 of the bracket 40 is a portion formed so as to protrude from the main surface portion 41 toward the center side of the conveyor device 1 in the transport direction X. The joint portion 45 is provided with two through holes 45b (see FIG. 1A) through which the screws 45a are passed, and the joint portion 45 and the frame 50 are joined to each other by the screws 45a. Thereby, the bracket 40 can be attached to the frame 50. The joint portion 45 is provided between the plurality of center side edge portions 43 in the height direction Y.

  According to the conveyor apparatus 1 which concerns on embodiment of this invention, the through-hole 61a which lets the center axis | shaft 21 of the driven sprocket 20 pass in the cover 60 which covers the rotation part 31 of the endless chain 30 is formed. Therefore, the driven sprocket 40 and the cover 60 are both supported by the central shaft 21. As a result, when the driven sprocket 20 is translated in the transport direction X in order to adjust the tension of the endless chain 30, the cover 60 also moves integrally with the driven sprocket 20. Thereby, the safety | security of a conveyor apparatus can be improved. Details will be described below.

  In the conventional conveyor apparatus 101 shown in FIG. 10, when the sprocket 120 is moved in order to adjust the tension of the endless chain 130, the cover 160 attached to the bracket 140 does not move. Therefore, the movement of the sprocket 120 changes the size of the space S1 between the rotating part 131 of the endless chain 130 and the cover 160. FIG. 11 shows a state in which the sprocket 120 is moved away from the cover 160 from the state of FIG. As shown in FIG. 11, when the space S1 between the rotating part 131 and the cover 160 is large, a foreign object is caught in the space S1, or an operator or the like accidentally puts a finger, and the conveyor There was a problem with the safety of the device. On the other hand, in the conveyor apparatus 1 according to the embodiment of the present invention, as shown in FIGS. 8 and 9, when the driven sprocket 20 is moved to adjust the tension of the endless chain 30, the cover 60 is connected to the driven sprocket 20. Move together. FIG. 9 shows a state where the driven sprocket 20 is moved from the state of FIG. 8 to the center side of the conveyor device. Therefore, the space between the rotation part 31 and the cover 60 can be made constant. Thereby, it can prevent reliably that a foreign material and a finger are caught in the space between the rotation part 31 and the cover 60, and can improve the safety | security of a conveyor apparatus.

  Further, in the conveyor device 1 according to the present embodiment, the cover 60 has the bearing retainer 63. That is, the cover 60 also serves as a bearing retainer. Thereby, it is not necessary to separately provide a bearing retainer for positioning the bearing 22 in the thrust direction, the number of parts of the conveyor device can be reduced, and the manufacturing cost can be reduced.

  Further, the cover 60 has a chain support portion 64 that supports the transport portion 33 of the endless chain 30. That is, the cover 60 can also be used as a component that prevents the endless chain 30 from biting into the driven sprocket 20. Therefore, it is not necessary to separately provide a part for preventing the endless chain 30 from being caught, and the number of parts can be reduced to reduce the manufacturing cost. Further, since the chain support portion 64 is provided on the cover 60, it moves integrally with the driven sprocket 20 in the same manner as the cover 60. As a result, the chain support portion 64 can stably prevent the endless chain 30 from biting without depending on the position of the driven sprocket 20. For example, if the driven sprocket 20 moves in a direction away from the chain support portion 64, there is a problem that the possibility that the endless chain 30 bites into the driven sprocket 20 increases. On the other hand, when the chain support part 64 moves integrally with the driven sprocket 20 to support the transport part 33 of the endless chain 30, there is no such problem, and the endless chain 30 can be prevented from being caught stably. Can do.

  Furthermore, the cover 60 is formed by a pair of cover pieces 60a and 60b provided at symmetrical positions with the driven sprocket 20 interposed therebetween, and the cover pieces 60a and 60b are formed symmetrically in the vertical direction. Therefore, the number of parts can be reduced and the manufacturing cost can be reduced. If the cover pieces 60a and 60b are not symmetrically formed in the vertical direction, the cover pieces 60a and 60b are arranged in front of the driven sprocket 20 and the driven sprocket 20 in the depth direction Z. Different parts must be prepared for the cover piece 60b arranged on the back side. On the other hand, when the cover pieces 60a and 60b are formed symmetrically in the vertical direction, when the cover piece 60a arranged on the front side of the driven sprocket 20 is turned over, the cover piece 60b arranged on the back side of the driven sprocket 20 is provided. Will match. Therefore, the cover 60 can be formed using the same cover piece on the front side and the back side of the driven sprocket 20. Thereby, the number of parts can be reduced and the manufacturing cost can be reduced.

  On the other hand, as described above, the cover 60 does not cover the upper portion of the rotating portion 31 of the endless chain 30 so as not to disturb the workpiece conveyance. Therefore, if the cover 60 is formed vertically symmetrical, the cover 60 does not cover the lower part of the rotating portion 31 of the endless chain 30. In this respect, according to the conveyor device 1 according to the present embodiment, the bracket 40 has the side surface portion 44, and the side surface portion 44 covers the lower portion of the rotating portion 31 of the endless chain 30. Thereby, the rotation part 31 of the endless chain 30 is not exposed, the danger that a foreign object or a finger is caught in the lower part of the rotation part 31 can be reduced, and the safety of the conveyor apparatus can be improved. . In addition, since the bracket 40 does not want to move integrally with the driven sprocket 20, the space between the bracket 40 and the lower part of the rotating part 31 will change. However, regarding the lower part of the rotating part 31, even if the space between the bracket 40 changes, it is almost impossible to assume that a foreign object or a finger enters the space.

  Moreover, in the conveyor apparatus 1 which concerns on this Embodiment, since the bracket 40 has the center side edge part 43 and the surface of this center side edge part 43 contact | abuts the flame | frame 50, it is a conveyor apparatus. Safety can be improved. For example, in the conventional conveyor apparatus 101 as shown in FIGS. 10 and 11, the bracket 140 is not provided with a central side edge. In this case, when the sprocket 120 moves to adjust the tension of the endless chain 130, the size of the space S2 between the sprocket 120 and the frame 150 changes. As shown in FIG. 10, when the space S2 between the sprocket 120 and the frame 150 is large, there is a possibility that foreign matter or the like is caught in the space S2. On the other hand, in the conveyor device 1 according to the present embodiment, since the surface of the central side edge 43 of the bracket 40 is in contact with the frame 50, the space between the driven sprocket 20 and the frame 50 is defined by the bracket 40. Covered and not exposed. Therefore, it is possible to reliably prevent foreign matter and the like from being caught between the driven sprocket 20 and the frame 50, and to improve the safety of the conveyor device.

  Furthermore, since the height of the cover 60 and the bracket 40 is designed so that the conveyance path of the endless chain 30 is exposed and the driven sprocket 20 is not exposed, the safety of the conveyor device can be improved. . For example, in the conventional conveyor apparatus 101 shown in FIGS. 10 and 11, the height of the cover 160 and the bracket 140 is designed to be a height at which the sprocket 140 is exposed. Therefore, there is a portion where the sprocket 120 is exposed above the bracket 140, and there is a possibility that foreign matter or the like may be caught in the portion. On the other hand, in the conveyor apparatus 1 according to the present embodiment, the height of the main surface portion 41 of the bracket 40 and the main surface portion 61 of the cover 60 is such that the conveying path of the endless chain 30 is exposed and the main surface portion of the bracket 40 is exposed. The surface portion 41 and the main surface portion 61 of the cover 60 are designed to be located on the inner peripheral side of the endless chain 30. As a result, the driven sprocket 20 is covered with the endless chain 30, the bracket 40 and the cover 60 as viewed from the depth direction Z. Therefore, there is no portion where the driven sprocket 20 is exposed above the bracket 40 and the cover 60, and foreign matter or the like is not caught in that portion. Therefore, it is possible to prevent a situation in which a foreign object or a finger is caught in the rotation of the driven sprocket 20 and improve the safety of the conveyor device.

  In the conveyor apparatus 1 according to the present embodiment, the mode in which the cover 60 moves integrally with the driven sprocket 20 by passing the central shaft 21 of the driven sprocket 20 through the through hole 61a of the cover 60 has been described. Not limited. Even if the cover 60 is not formed with a through hole, the cover 60 can be moved integrally with the driven sprocket 20 even if the cover 60 is attached to the central shaft 21 of the driven sprocket 20 by, for example, bolts or screws. This can solve the problems of the present invention.

  Moreover, although the side part 44 of the bracket 40 described the aspect which covers the lower part of the rotation part 31 of the endless chain 30, it was not restricted to this. For example, the side surface portion 62 of the cover pieces 60 a and 60 b may cover the lower portion of the rotating portion 31 of the endless chain 30. In this case, the cover pieces 60a and 60b are not formed symmetrically in the vertical direction, but even if the bracket 40 does not have the side surface portion 44, the lower portion of the rotating portion 31 of the endless chain 30 is not exposed, and the conveyor device It becomes possible to maintain the safety of.

  Further, the cover 60 is described as being formed by the pair of cover pieces 60a and 60b coming into contact with each other with the driven sprocket 20 interposed therebetween. However, the present invention is not limited to this, and the cover 60 is formed of a single component. The problem of the present invention can be solved by covering the transport portion 33 of the endless chain 30. Further, the cover pieces 60a and 60b may not contact each other completely, and a gap of about 2 mm or less may be provided between the side surface parts 62. If the cover pieces 60a and 60b are completely in contact with each other without providing a gap between the side surface portions 62, the contact portions obstruct the bearing retainer 63 from pressing the bearing 22 in the thrust direction. There is a fear. On the other hand, if it is designed so that a gap is formed between the side surfaces 62, the bearing retainer 63 can reliably retain the bearing 22 in the thrust direction. In addition, if the gap is about 2 mm or less, it is almost impossible to assume a situation in which a foreign object or a finger enters through the gap, so that there is no particular problem.

  Further, in the conveyor device 1 according to the present embodiment, it has been described that the driven sprocket 20 is moved for adjusting the tension of the endless chain 30, but the present invention is not limited to this, and instead of the driven sprocket 20, the drive sprocket 10 is used. It is good also as moving.

  Furthermore, although the conveyor apparatus 1 which concerns on this Embodiment described the aspect which is a chain conveyor which has the drive sprocket 10, the driven sprocket 20, and the endless chain 30, it is not restricted to this, Rollers other than a sprocket, An endless rotating body other than the endless chain may be used. For example, even a belt conveyor that uses a pulley as a roller other than a sprocket and uses an endless belt as an endless rotating body other than an endless chain can solve the problems of the present invention.

DESCRIPTION OF SYMBOLS 1 Conveyor apparatus 10 Drive sprocket 20 Driven sprocket 21 Center shaft 22 Bearing 30 Endless chain 31, 32 Rotating part 33 Conveying part 40 Bracket 41 Main surface part 42 End side edge part 43 Central side edge part 44 Side part 50 Frame 60 Cover 61 Main surface portion 62 Side surface portion 63 Bearing retainer 64 Chain support portion

Claims (5)

Laura,
An endless rotating body having a conveying portion that forms a conveying path of the workpiece and having a rotating portion formed by being held on the outer periphery of the roller;
A cover that covers the rotating portion of the endless rotating body,
The roller is movable for adjusting the tension of the endless rotating body,
The conveyor is configured to move integrally with the roller. A bracket for holding the roller and the cover in a state in which the movement for adjusting the tension is possible;
The said bracket is formed so that the said rotation part of the said endless rotation body may be covered. The conveyor apparatus of Claim 1 characterized by the above-mentioned. The bracket supports a central axis of the roller;
A bearing is provided between the central shaft and the roller;
The conveyor device according to claim 2, wherein the cover has a bearing retainer that positions the bearing by thrusting in the thrust direction. The cover is formed by a pair of cover pieces provided at symmetrical positions across the roller,
The conveyor device according to any one of claims 1 to 3, wherein the cover piece is formed symmetrically with respect to a horizontal plane passing through a central axis of the roller. The roller is a sprocket, and the endless rotating body is a chain conveyor having an endless chain,
The said cover has a chain support part which supports the conveyance part of the said endless rotation body. The conveyor apparatus in any one of Claims 1-4 characterized by the above-mentioned.

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