JP5024627B2 - Drive shaft cover device - Google Patents

Description

  The present invention relates to a drive shaft cover device installed around a drive shaft of a conveyor.

A roller conveyor in which a plurality of rollers parallel to each other in a horizontal direction are supported by a frame is disclosed in the following patent document. A drive shaft extending along the frame is provided below the plurality of rollers so as to transmit a rotational force based on the output of a motor or the like from the drive shaft to each roller via an endless transmission member. Yes. In addition, the drive shaft is covered with a cover member to prevent a worker standing in the vicinity of the roller conveyor from touching the drive shaft accidentally, but the cover member must be removed when the transmission member is replaced. There must be.
JP 2006-044854 A

  By adding a cover member to the above roller conveyor, it is not desirable to increase the cost of the roller conveyor. Therefore, if a flexible material having elasticity and elasticity such as rubber or soft plastic is bent into a groove shape and installed around the drive shaft, the above material can be used as a cover member at low cost. . However, the work of tightening or loosening the bolts on the roller conveyor frame with the above materials must be done by the operator bending his waist and reaching out to the lower side of the frame. Force posture. This problem becomes more serious as the position where the frame is installed is lower.

  An object of the present invention is to provide a drive shaft cover device that can be easily attached to and detached from the conveyor without increasing the manufacturing cost of the conveyor.

  In the drive shaft cover device according to the present invention, a drive shaft extending along the frame is disposed below the plurality of rollers supported by the frame, and a rotational force is transmitted from the drive shaft to the plurality of rollers via transmission members, respectively. And a groove-shaped cover member having an outer surface projecting downwardly, and the groove-shaped cover member being inserted into both sides extending in the axial direction of the drive shaft, and the groove-shaped cover member A latch member that latches one of the two sides from the inside, and a clamp that is fixed to the frame of the conveyor and faces the latch member with one side of the channel cover member interposed therebetween. A support member that supports an outer surface of the groove-shaped cover member, and a retaining member that is detachably attached to the clamping member; Fastening means to tighten and Characterized in that it comprises.

Furthermore, in the drive shaft cover device according to the present invention, the groove-shaped cover member has a mesh-shaped hole, and the hooking member projects a claw that hooks into the hole. The groove-shaped cover member may be a molded product of synthetic resin. The support member may extend to just below the channel cover member.

  According to the drive shaft cover device of the present invention, the latch member latches one side of the groove-shaped cover member from the inside, and the support member supports the outer surface of the groove-shaped cover member at a position below this. The moment when the groove-shaped cover member tries to rotate in the direction in which the other side part of the two side parts descends with the center of gravity located between the two side parts as the force point, is counteracted by the reaction of the latching member and the support member. One side of the channel cover member can be held between the member and the support member. For this reason, regardless of the force with which the fastening means fastens the latching member to the clamping member, the groove-shaped cover member maintains the posture in which the drive shaft has entered the inner sides of both sides, and does not fall off the conveyor.

  For example, when a bolt that penetrates the clamping member from the front of the conveyor frame and is screwed into the latching member is applied as a fastening means, the bolt is loosened in advance and a grooved cover is provided between the latching member and the support member. If one side of the member is inserted, the channel-shaped cover member can be temporarily fixed at a desired position on the conveyor. In addition, the bolt as the fastening means can be fastened from the front of the conveyor frame, and the trouble of holding the groove-shaped cover member during the fastening of the bolt can be omitted. The effect described here is the same also about the operation | work which loosens the volt | bolt which is a fastening means. Therefore, the operator can easily attach or remove the groove-shaped cover member from the conveyor.

  Further, according to the drive shaft cover device according to the present invention, the hook-shaped cover member is hooked to the hooking member by hooking the hook of the hooking member into the mesh-shaped hole of the groove-shaped cover member in the temporary fixing stage. Can be prevented from slipping. For this reason, in the process of tightening the bolt as the fastening means, it is possible to obtain an advantage that the position of the groove-shaped cover member does not change with respect to the frame of the conveyor.

  Furthermore, when a synthetic resin molding is applied as the groove-shaped cover member, the groove-shaped cover member can be reduced in weight, the unit price of the groove-shaped cover member can be reduced, and the manufacturing cost of the drive shaft cover device can be reduced. In addition, since the groove-shaped cover member only needs to have a substantially groove-shaped cross section and appropriate rigidity, the groove-shaped cover member can be easily obtained and manufactured. Further, it is easy to cut the groove-shaped cover member into a desired shape or size.

  1 and 2 show a drive shaft cover device 3 attached to the frame 2 of the conveyor 1. The frame 2 is mainly composed of a lightweight steel having a horizontal posture in which the end portion of the roller 4 is supported by the web 21 and a flange 22 is projected from the front surface of the conveyor 1. As described above, the plurality of rollers 4 are arranged in parallel, and the rotational force of the drive shaft 5 is transmitted to the individual rollers 4 via the transmission member 6. Reference numerals 23 and 24 respectively denote a horizontal frame member that connects the frame 2 to a frame provided outside the figure, and a bearing that supports the drive shaft 5. Reference numeral 25 indicates a leg portion of the conveyor 1.

  The drive shaft cover device 3 includes a groove-shaped cover member 7, a latching member 8, a clamping member 9, a support member 10, and fastening means 11. The drive shaft cover device 3 will be described in detail below. The drawings refer to FIGS. 1 to 3 unless otherwise specified.

  The elements of the drive shaft cover device 3 are shown one by one in the drawing, but a plurality of elements other than the groove-shaped cover member 7 are arranged at an appropriate interval in the arrow S direction. . An arrow S indicates the axial direction of the drive shaft 5. The groove-shaped cover member 7 has both side portions 71 and 72 extending in the arrow S direction, and an outer surface 73 protruding downward from one side portion 71. It is preferable to apply a synthetic resin molding as the groove-shaped cover member 7. It is more preferable if it is a molded article having a mesh-like hole. The space | interval of the both sides 71 and 72 should just have the width which can make the drive shaft 5 approach with the latching member 8 inside it.

  The groove-shaped cover member 7 only needs to have a rigidity that does not bend due to its own weight because of its groove-shaped cross section. For example, a synthetic resin pipe-shaped net material that is divided into a circular arc shape may be used as the groove-shaped cover member 7. In this case, the groove-shaped cover member 7 can be reduced in weight, the unit price of the groove-shaped cover member 7 can be reduced, and the manufacturing cost of the drive shaft cover apparatus 3 can be reduced. In addition, since it is easy to cut the synthetic resin into a desired shape or size, there is an advantage that the specifications of the groove-shaped cover member 7 can be freely changed at the site where the conveyor 1 is installed.

  A ridge 70 is provided on the outer surface 73 of the groove-shaped cover member 7. That is, in order to further reinforce the pipe-shaped net member, a synthetic resin spiral tube is fused in advance to the outer peripheral surface thereof. This spiral tube corresponds to the ridge 70. The ridge 70 is a part of the outer surface 73 of the groove-shaped cover member 7, but is not an essential element for the groove-shaped cover member 7. Regardless of the presence or absence of the ridge portion 70, the groove-shaped cover member 7 can sufficiently satisfy the above-described rigidity. Therefore, when the groove-shaped cover member 7 is provided with the ridge portion 70, the rigidity of the groove-shaped cover member 7 is further improved. . Further, the size or shape of the mesh of the groove-shaped cover member 7 is not limited at all.

  The retaining member 8 is formed by bending a steel plate into a substantially U shape, and includes a spacer piece 81, an upright piece 82, and an inclined piece 83. Further, a female screw 84 is formed on the standing piece 82, and a plurality of saw blade-like claws 85 are formed on the lower end of the inclined piece 83. The sandwiching member 9 and the support member 10 are an integrated body formed by bending a steel plate into a substantially square shape. The material of the latch member 8, the sandwiching member 9, and the support member 10 is not limited to steel, and may be a light alloy such as aluminum or a non-metal such as a synthetic resin.

  The sandwiching member 9 includes a fixing piece 91 extending along the lower surface of the flange 22 of the frame 2, a sandwiching piece 92 facing the claw 85 of the hooking member 8 with the one side portion 71 of the groove-shaped cover member 7 interposed therebetween, And an upper flange 93 overlapping above the spacer piece 81 of the latching member 8. The fixing bolt 12 penetrating the flange 22 of the frame 2 passes through the insertion hole 94 drilled in the fixing piece 91, and the nut 13 is fastened to the fixing bolt 12 below the fixing piece 91. Accordingly, the sandwiching member 9 and the support member 10 are fixed to the frame 2, and the entire drive shaft cover device 30 is positioned on the frame 2.

  The support member 10 is a part that plays the role of supporting the outer surface 73 of the groove-shaped cover member 7 below the position where the claw 85 of the hooking member 8 latches the groove-shaped cover member 7. As the fastening means 11, the head portion 14 is directed to the front surface of the conveyor 1, the shaft portion 15 passes through the insertion hole 95 drilled in the sandwiching piece 92 of the sandwiching member 9 from the front surface of the conveyor 1, and the shaft portion 15 further extends. A bolt that is fastened to the female screw 84 of the latch member 8 is applied. In addition, a band, a wire, a clamp, or the like may be applied as the fastening means 11 as long as the latching member 8 can be detachably fastened to the clamping member 9. Hereinafter, it is assumed that the fastening means 11 is a bolt.

  In order to remove the groove-shaped cover member 7 from the conveyor 1, first, an operator loosens the bolt 11, and one of the groove-shaped cover members 7 is interposed between the claw 85 of the hooking member 8 and the sandwiching piece 92 of the sandwiching member 9. Open the side part 71 of the. In this state, the moment when the groove-shaped cover member 7 tries to rotate in the direction in which the other side portion 72 descends with the center of gravity located between the both side portions 71, 72 as a power point, is applied to the latch member 8 and the support member 10. It can cancel by reaction and can hold | maintain the one side part 71 of the groove-shaped cover member 7 between the latching member 8 and the supporting member 10. FIG. For this reason, the groove-shaped cover member 7 does not fall off from the conveyor 1.

  Subsequently, when the operator pulls out one side 71 from between the retaining member 8 and the sandwiching member 9 by grasping the other side 72 of the grooved cover member 7 or the like, the grooved cover is provided. The member 7 can be easily removed from the conveyor 1. Further, the operator does not need to loosen the bolt 11 until the shaft portion 15 of the bolt 11 is detached from the female screw 84 of the latching member 8 in the step of loosening the bolt 11.

  On the other hand, when attaching the groove-shaped cover member 7 to the conveyor 1, the operator holds the groove-shaped cover member 7 and holds one side portion 71 between the claw 85 of the latching member 8 and the sandwiching member 9. Insert between the piece 92. At this time, the latching member 8 latches one side portion 71 of the groove-shaped cover member 7 from the inside, and the support member 10 supports the outer surface 73 of the groove-shaped cover member 7 at a position below this. The moment generated in the shape cover member 7 is canceled out. For this reason, the groove-shaped cover member 7 maintains a posture in which the drive shaft 5 is made to enter inside the both side portions 71 and 72 and does not fall off the conveyor 1. Therefore, the groove-shaped cover member 7 is temporarily fixed at an appropriate position on the conveyor 1.

  Subsequently, the operator removes his / her hand from the groove-shaped cover member 7 and tightens the bolt 11. The side portion 71 is firmly clamped, and the mounting of the groove-shaped cover member 7 is completed. The distance between the standing piece 82 of the latching member 8 and the sandwiching piece 92 of the clamping member 9 is defined by the spacer piece 81 of the latching member 8. When the operator rotates the bolt 11, even if the latching member 8 tries to rotate together with the bolt 11, the spacer piece 81 abuts against the upper flange 93 of the clamping member 9, so that the latching member 8 rotates unnecessarily. There is no.

  According to the drive shaft cover device 3 described above, the operator can perform the operation of tightening and loosening the bolt 11 on the front side of the frame 2 of the conveyor 1, and while performing these operations, A person does not need to perform the miscellaneous operation of holding the groove-shaped cover member 7 by hand. Therefore, it is easy to attach the groove-shaped cover member 7 to the conveyor 1 and to remove it from the conveyor 1. Furthermore, the hook-shaped cover member 7 can be prevented from slipping with respect to the hooking member 8 by hooking the claws 85 of the hooking member 8 into the mesh-like holes of the groove-shaped cover member 7 at the stage of temporary fixing. For this reason, the position of the groove-shaped cover member 7 does not go wrong with respect to the frame 2 of the conveyor 1 in the process in which the bolt 11 is tightened.

  As shown in FIGS. 4A and 4B, the cross section of the groove-shaped cover member 7 does not necessarily have an arc shape. The support member 10 may be extended to directly below the groove-shaped cover member 7. Further, the hooking member 8 may be suspended from the upper flange 93 of the sandwiching member 9. In addition, the groove-shaped cover member 7 may be made of a hard rubber, a light alloy sash bar, a punching metal, an expanded metal, or a wire mesh.

  It should be noted that the present invention can be implemented in variously modified, modified, or modified forms based on the knowledge of those skilled in the art without departing from the spirit of the present invention. FIG. 5A shows a drive shaft cover device 30 according to a further embodiment of the present invention. Next, differences from the above embodiment will be described. The same designations will continue to be used for the elements already described.

  The latching member 8 and the support member 10 are an integral body formed by bending a steel plate. The latching member 8 is fixed to the flange 22 using the fixing bolt 12 and the nut 13 shown in FIG. Thereby, the clamping member 9 is indirectly fixed to the frame 2, and the entire drive shaft cover device 30 is positioned on the frame 2. The sandwiching member 9 includes a sandwiching piece 92 and a spacer piece 96 that are opposed to the claw 85 of the latching member 8 with the one side portion 71 of the groove-shaped cover member 7 sandwiched therebetween. Further, the bolt 11 may play a role played by the sandwiching member 9. In this case, as shown in FIG. 4B, a through hole 74 or a notch for passing the bolt 11 is formed in one side 71 of the groove-shaped cover member 7, and the bolt 11 directly The side portion 71 is fastened to the hooking member 8.

  The present invention is not limited to the drive shaft of a roller conveyor, but is a technique useful for covering parts that operate with a shaft that is rotated by a motor or the like.

The front view of the conveyor which attached the drive shaft cover apparatus which concerns on embodiment of this invention. AA sectional view taken on the line AA of FIG. The disassembled perspective view of the drive-shaft cover apparatus which concerns on embodiment of this invention. (A) is sectional drawing which shows one modification of the drive-shaft cover apparatus which concerns on embodiment of this invention, (b) is sectional drawing which shows another modification. (A) is sectional drawing which shows one modification of the drive-shaft cover apparatus which concerns on further embodiment of this invention, (b) is sectional drawing which shows the modification.

Explanation of symbols

1: Conveyor 2: Frame 3: Drive shaft cover device 4: Roller 5: Drive shaft 6: Transmission member 7: Groove-shaped cover member 8: Holding member 9: Clamping member 10: Support member 11: Fastening means 71, 72 : Side part 73: Outer surface 85: Nail

Claims (4)

A drive shaft extending along the frame is disposed below a plurality of rollers supported by the frame, and the drive shaft is attached to a conveyor from which rotational force is transmitted to the plurality of rollers via a transmission member. A cover device,
A groove-shaped cover member that allows the drive shaft to enter inside both side portions extending in the axial direction of the drive shaft, and projects the outer surface downward;
A latching member that latches one side of both sides of the groove-shaped cover member from the inside thereof;
A clamping member fixed to the frame of the conveyor and facing the hooking member across one side of the groove-shaped cover member;
A supporting member that supports an outer surface of the groove-shaped cover member below a position where the hooking member latches the groove-shaped cover member;
A drive shaft cover device comprising fastening means for detachably fastening the latch member to the clamping member.   The drive shaft cover device according to claim 1, wherein the groove-shaped cover member has a mesh-shaped hole, and the hooking member protrudes a claw that hooks into the hole.   The drive shaft cover device according to claim 1, wherein the groove-shaped cover member is a synthetic resin molding. The drive shaft cover device according to any one of claims 1 to 3, wherein the support member extends to a position directly below the groove-shaped cover member.

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