JP2005126238A - Dust scatter preventing device for hoisting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust scatter preventing device for a hoisting device easily installed at an elevated spot and having a small dead space in expansion. <P>SOLUTION: The dust scatter preventing device for the hoisting device is provided with an expansive covering body 9 for covering a load chain 4, between a body frame of a winder for the load chain 4, and a lower frame 11 provided at the base part of a lower hook 7 installed at the lower end of the load chain 4. The expansive covering body 9 is constituted to install the upper part at an upper frame 10 and the lower part at the lower frame 11 beforehand and to integrally connect the upper frame 10 as a unit to a bracket fixedly mounted to a hoisting device body frame. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a dust scattering prevention device for an overhead traveling crane installed in a clean room or the like.

In recent years, manufacturing equipment for various products typified by semiconductor manufacturing equipment, liquid crystal manufacturing equipment, and food manufacturing and processing equipment has been equipped with clean rooms, transporting parts and products in the clean rooms, and maintenance of equipment. A crane is installed. However, overhead traveling cranes may generate dust due to wear of hoisting machine load chains, wire ropes, drums, etc., and when installing overhead traveling cranes in a clean room, means to prevent dust scattering Has been taken. (For example, see Patent Document 1)
Hereinafter, a dust scattering prevention device in a conventional overhead traveling crane will be described with reference to FIG. The overhead traveling crane shown in FIG. 7 is used for hoisting that hangs down through the opening 33 of the frame 32 at the lower part of the frame 32 of the traversing trolley that supports the hoisting machine 31 provided with the winding drum 40. A stretchable covering tube 35 surrounding the wire rope 34 is provided, and an upper end portion of the stretchable covering tube 35 is fixed around the opening 33 in the frame 32, and a lower lid 36 attached to the lower end portion of the stretchable covering tube 35. Further, the shaft portion of the suspension hook 37 supported by the wire rope 34 is inserted, and the stretchable covering cylinder 35 prevents scattering of dust generated on the wire rope 34, the winding drum 40, and the like. This anti-scattering device allows dust to fall into and accommodates the expansion coating cylinder 35 to prevent scattering, but the expansion coating cylinder 35 is directly attached to the frame 32 of the trolley as shown in FIG. Therefore, when mounting at a high place or the like, the number of man-hours for modification is increased. On the other hand, in order to prevent contact with the wire rope 34, a bellows body having a large number of annular metal wires 38 for retaining the shape, so-called protective rings, is provided. Therefore, the expansion / contraction rate of the expansion / contraction covering cylinder 35 decreases, and the dead space at the time of winding increases.
Japanese Utility Model Publication No. 61-160185 (p. 3-5, FIG. 5)

  As described above, the conventional dust scatter prevention device for a traveling crane installed in a clean room is provided with a mounting bracket at the upper end portion of the stretchable covering cylinder 35, and the mounting bracket is provided around the opening 33 of the trolley frame 32. Installation of the stretchable covering cylinder 35 to the frame 32 has been performed. For this reason, when installing the expansion / contraction covering cylinder 35 in a hoisting device that does not include the tangled expansion / contraction covering cylinder 35, it is necessary to perform a process for installing the mounting bracket on the frame 32, and it is installed at a high place. In order to install the mounting bracket on a hoisting device such as a hoist, it is necessary to lower the hoist from a high place to the floor and process the main body frame, resulting in increased man-hours and cost increase Had. Moreover, it has the subject that it interferes with a no-load chain storage bucket at the time of expansion-contraction operation | movement of an expansion-contraction covering body, and obstructs expansion-contraction operation | movement. Further, since the protective ring of the annular metal wire is provided at a narrow pitch in the stretchable coated cylinder, the stretch rate is poor, and there is a problem that the dead space becomes large at the time of shrinkage. In addition, when the load chain is inclined, there is a problem that the stretch-coated tube comes into contact with the load chain and the base of the stretch-coated tube is damaged.

  In order to solve the above-mentioned problem, the dust scattering preventing device in the hoisting device of the present invention is provided between the main body of the hoisting device for hoisting and lowering the load chain and the lower hook base portion provided at the lower end of the load chain. In the dust scattering prevention device in the hoisting device provided with the stretchable covering for covering the upper part, the upper part of the stretchable covering is attached to the upper frame, the lower part is attached to the lower frame, and the upper frame is attached to the mounting frame attached to the hoisting apparatus main body. Provided is a dust scattering prevention device in a hoisting device characterized in that an integral stretch covering unit is provided.

  Further, the mounting frame is a box-shaped dust receiver that is open at the top, and is further provided between the stretchable sheath and the load chain, and is a linear guide body that guides the stretchable sheath. The winding device is integrally attached to the mounting frame as a unit, and the winding device is provided so as to rotate in the horizontal direction.

  In addition, a no-load chain storage bucket with a wide upper part and a narrow lower part is attached to the mounting frame in close proximity to the elastic cover and does not interfere with the elastic cover when the elastic cover is moved up and down. It is characterized by that.

  According to the present invention, the stretchable covering is attached to the upper frame with the upper part attached to the lower frame, and the upper frame is attached to the attachment frame attached to the hoisting device body to form an integral stretchable covering unit. In addition, the mounting frame is installed between the stretch jacket and the load chain, and the guide body winding device for guiding the stretch jacket is integrally attached as a unit and unitized as a stretch jacket. For example, a frame can be attached to the hoisting device body by simply tightening it together with the motor mounting bolts, greatly reducing the number of man-hours and costs for remodeling, and making it easy to prevent dust scattering from existing hoists. In addition, the upper frame can be installed on the lower part of the box-shaped dust collector that is installed on the hoisting device body and the upper part is opened. Is installed on the lower hook base so that dust generated when the hoisting machine is driven can be collected by the dust receiver, so that a hoisting machine suitable for a clean room can be provided, and the dust cover can be expanded and contracted. Since the is directly attached, the number of parts can be reduced. Furthermore, since the upper part of the dust receiver is opened, the winding device can be easily seen and the presence or absence of a failure can be easily found. Furthermore, by integrating the dust prevention device including the dust receiver and the stretchable covering body, the dust prevention device having the dust scattering prevention device can be easily attached to the existing hoisting device. Furthermore, since the no-load chain bucket does not interfere with the expansion / contraction operation of the expansion / contraction covering body, the expansion / contraction operation of the expansion / contraction covering body can be performed reliably, and a compact hoisting device in which the chain bucket does not become a dead space can be provided. In addition, the elastic covering is stretched in a bellows shape between the lowered position and the raised position of the lower hook in the state of covering the load chain in conjunction with the vertical movement of the load chain, and expands and contracts with the load chain during the expansion and contraction operation. Between the coverings, the lower part is engaged with the lower frame, and there are provided a plurality of guide bodies that move up and down in conjunction with the movement of the load chain. Even if it contacts, since it does not contact a load chain, damage to an expansion-contraction covering body can be prevented.

(Example 1)
Hereinafter, with reference to FIGS. 1-6, Example 1 of the dust scattering prevention apparatus in the winding apparatus of this invention is demonstrated. 1 is a front view of a dust scattering prevention apparatus according to a first embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a front view showing an extendable covering unit, FIG. 4 is a side view of FIG. FIG. 6 is a side view showing the lower hook mounting portion, and FIG. 6 is a side view showing the chain storage bucket.

  In the figure, 1 is a rail, 2 is a trolley that travels on rail 1, 3 is a hoist that mounts a load sheave for hoisting a load chain, 4 is a load chain, 5 is a trolley traveling motor, and 6 is a hoist drive motor. is there. The load chain 4 has a lower hook 7 fixed to the lower end thereof, and is wound around a load sheave 8 provided on the hoist 3. Reference numeral 9 is provided at the lower part of the hoist 3, and is a covering body that covers the load chain 4 and extends and contracts in a bellows shape between the bases of the hoist 3 and the lower hook 7. The upper part is an upper frame 10 and the lower part is a lower frame 11. The upper frame 10 is attached to the attachment frame 13 attached to the hoisting device main body to constitute an integral stretch covering unit. Reference numeral 12a denotes a winding device that is integrally provided on the mounting frame 13 and winds a linear guide 14 that guides the stretchable covering body 9 so as not to contact the load chain. The upper frame 10 is provided with an opening (not shown) through which the load chain 4 and the guide body 14 pass. Further, as described above, the upper frame 10 is attached with the upper end of the elastic covering 9 that is the covering of the load chain 4 in close contact, and the lower end of the elastic covering 9 is the upper base of the lower hook 7. It is attached in close contact with the outer side of the lower frame 11 attached to the lower bracket 15 fixed to the base plate. The stretchable covering 9 covers the entire suspended portion of the load chain 4 outside the load chain 4. The lower frame 11 is provided with a locking portion 16 for locking the lower end of the linear guide body 14. The stretchable covering body 9 is made of a thin material and stretches and contracts in a substantially bellows shape. Reference numeral 17 denotes a lower hook mounting bracket, and the upper end of the lower hook 7 and the lower inner surface of the mounting bracket 17 are rotatably connected by being concavo-convexly fitted, and the lower end of the load chain 4 is connected to the upper portion of the lower hook mounting bracket 17. By fastening the mounting bolt 18 and fastening the mounting bolt 18, the lower hook 7 is connected to the lower hook 7 and the load chain is connected to the upper end of the lower hook mounting bracket 17. By fastening the lower bracket 15 together, the lower bracket 15 is also integrally connected to the lower hook mounting bracket 17.

  3 and 4, the winding device 12a includes at least a pair of left and right winding rollers for winding the guide body 14, and at least left and right for guiding the guide 14 delivered from the winding device 12a. A pair of guide rollers 19 are provided in the vicinity, and these are accommodated in the mounting frame 13. The upper portion of the mounting frame 13 is fixed to the lower surface of the mounting bracket 20, and the lower portion is fixed to the upper surface of the upper frame 10.

  In the above embodiment, the winding device 12a for the guide body is provided. However, when there is no contact between the stretchable covering body and the load chain, there is no need to provide the winding device 12a or the guide body 14. In this case, the upper frame 10 is directly attached to the mounting bracket 20.

  In addition, as shown in FIG. 2, an unloaded chain storage bucket 21 is provided in the vicinity of the stretchable covering body 9, the upper portion being wide and the lower portion being narrow. By doing in this way, the said no-load chain storage bucket 21 can be prevented from interfering with the expansion-contraction covering body 9 at the time of the vertical expansion-contraction operation | movement of the expansion-contraction covering body 9. FIG. Also, as shown in FIG. 6, the upper end of the chain storage bucket is attached to a bucket mounting bracket 22 having an extending portion that extends from the side of the upper end portion toward the hoisting device main body, and the extending portion is the mounting bracket. 20 is fixed. Further, several guide bodies 14 are provided between the load chain 4 and the stretchable covering body 9, and preferably four guide bodies 14 are synchronized with the winding / lowering operation of the load chain 4 by the winding roller which is the winding device 12 a. Thus, tension is always applied in the winding direction by the winding device 12a so as to automatically move up and down. The stretchable covering body 9 expands and contracts in a bellows shape between the lowered position and the raised position of the lower hook 7 by the hoisting and lowering operation of the load chain 4. The elastic covering 9 is prevented from contacting the load chain 4 by the guide action of the guide 14 provided between the load chain 4 and the elastic covering 9 during the up-and-down extending operation. In addition, since the base material of the stretch covering 9 can be made of a thin cloth, the stretch rate of the stretch covering 9 can be increased, and the dead dimension of the lower hook 7 when the stretch covering 9 is contracted can be increased. Can be small. Moreover, since the guide body 14 is always tensioned in the winding direction by the winding device 12, the guide body 14 is always in tension, and the contact between the load chain 4 and the stretchable covering body 9 can be reliably prevented. Further, it is possible to prevent damage to the stretch covering 9.

  As described above, according to the present embodiment, the stretchable covering body 9 is integrally attached to the attachment frame that is attached to the upper frame with the upper part attached to the upper frame and the lower part attached to the lower frame. Further, as a unit, the winding device for the guide body that guides the stretchable covering body is integrally attached as a unit between the upper frame and the mounting frame to form the unit of the stretchable covering body 9. For example, by simply tightening together with the mounting bolt of the hoist drive motor, the telescopic covering unit can be installed on the hoisting device body, so the modification man-hours and cost can be greatly reduced, and the existing hoist can be easily and easily installed. A dust scattering prevention device that can be installed at low cost can be provided. Furthermore, since the chain storage bucket does not interfere with the expansion / contraction covering 9 during the expansion / contraction operation of the expansion / contraction covering 9, the expansion / contraction operation of the expansion / contraction covering 9 can be performed reliably and the chain storage bucket 2 does not become a dead space. A compact hoisting device can be provided. Furthermore, since the lower part of the expansion-contraction covering body 9 can be easily attached to the lower bracket 15, modification cost can be reduced. Further, the stretchable covering body 9 expands and contracts in a substantially bellows shape between the lowered position and the raised position of the lower hook 7 in a state of covering the load chain 4 in conjunction with the vertical movement of the load chain 4. Sometimes, between the load chain 4 and the stretchable covering body 9, the lower part is engaged with the lower frame 11 and a plurality of guide bodies 14 that move up and down in conjunction with the load chain 4 are provided. Since the body 9 does not come into contact with the load chain 4 even when it contacts the guide body 14 during the expansion / contraction operation, it is possible to prevent the expansion covering body 9 from being damaged.

(Example 2)
Hereinafter, with reference to FIGS. 7-10, Example 2 of the dust scattering prevention apparatus in the winding apparatus of this invention is demonstrated.

  7 is a front view of the dust scattering prevention device of the second embodiment of the present invention, FIG. 8 is a side view of FIG. 7, FIG. 9 is a plan view of a dust receiving portion, and FIG. 10 is a front view showing an installation state of a winding roller. It is. In the figure, the configurations shown in 1 to 8 are the same as those in the first embodiment, and a description thereof will be omitted. A cover 9 is provided at the lower part of the main body of the hoist 3 and covers the load chain 4 between the hoist and the base of the lower hook 7 and expands and contracts in a bellows shape. The upper part of the covering body 9 is attached to the upper frame 10 and the lower part is attached to the lower frame 11, and the upper frame 10 is attached to the lower part of the chile receiver 23 attached to the hoisting device main body to constitute an integral covering body unit. . 12b is a winding device that is supported by a support bracket 24 mounted on a dust receiver 23 described later, and winds a linear guide body 14 that guides the stretchable covering body 9 so as not to contact the load chain. The upper frame 10 is provided with an opening (not shown) through which the load chain 4 and the guide body 14 pass. Further, as described above, the upper frame 10 is attached with the upper end of the elastic covering 9 that is the covering of the load chain 4 in close contact, and the lower end of the elastic covering 9 is the upper base of the lower hook 7. It is attached in close contact with the outer side of the lower frame 11 attached to the lower bracket 15 fixed to the base plate. The stretchable covering 9 covers the entire suspended portion of the load chain 4 outside the load chain 4. Reference numeral 17 denotes a lower hook mounting bracket, and the upper end of the lower hook 7 and the lower inner surface of the mounting bracket 17 are rotatably connected by being unevenly fitted so that the load chain 4 can pass through the lower hook mounting bracket 17. The lower hook 7 is connected to the lower end of the lower hook mounting bracket 17 and the load chain is connected to the upper end by fastening the mounting bolt 18 supported by a sheave or the like. By fastening the lower bracket 15 together, the lower bracket 15 is also integrally connected to the lower hook mounting bracket 17.

  As shown in FIGS. 7 and 8, the winding device 12 a is supported by a support bracket 24 provided on the dust receiver 23 and includes at least a pair of right and left winding rollers that wind the guide body 14. Further, as shown in FIG. 10, the guide body 14 can be wound up by a winding roller 12c that is turned sideways and rotated in the horizontal direction.

  As described above, the guide roller 12c, which is a winding device, is arranged in the dust receiver 23 so as to rotate horizontally, so that the dust receiver 23 can be provided close to the winding device body, and therefore the lower hook is wound. It is possible to increase the limit position to be raised, and there is an effect that the dead space in the vertical direction of the entire hoisting device can be reduced.

  In FIG. 9, reference numeral 23a denotes a reinforcing rib for reinforcing the dust receiver, 24 denotes a support bracket for the winding roller 12a, and in this embodiment, four winding rollers 12a are provided. Reference numeral 25 denotes an opening through which the load chain 4 and the guide body 14 pass. Reference numeral 26 denotes an attachment bracket for attaching the chile receiver 23 to the hoisting device main body. The mounting bracket 26 is fixed to both side portions of the dust receiver 23 and has a mounting portion 26 a extending upward in an L shape from both side portions. The mounting portion 26 a is shared with mounting bolts of the motor cover 28 and the electrical component cover 27. By tightening and attaching to the hoisting device main body, the dust receiver 23 can be easily attached to the hoisting device main body.

  Further, as shown in FIG. 8, the second embodiment is similar to the first embodiment, in the vicinity of the stretchable covering 9, the no-load chain storage bucket 21 having a wide upper portion and a narrow lower portion on the dust receiver 23. Is provided. By doing in this way, the said no-load chain storage bucket 21 can be prevented from interfering with the expansion-contraction covering body 9 at the time of the vertical expansion-contraction operation | movement of the expansion-contraction covering body 9. FIG. Further, as shown in FIG. 6, the bucket 21 is attached to the dust receiver 23 by attaching the upper part of the chain storage bucket to the bucket mounting bracket 22 and fixing the bracket 22 to the dust receiver 23. Several guide bodies 14 are provided between the load chain 4 and the stretchable covering body 9, and are automatically moved up and down in synchronism with the winding and lowering operation of the load chain 4 by the winding rollers 12b and 12c provided in the winding device 12. A tension is always applied in the winding direction by the winding device 12 so as to move. It is preferable to provide four guide bodies 14. The stretchable covering body 9 expands and contracts in a bellows shape between the lowered position and the raised position of the lower hook 7 by the hoisting and lowering operation of the load chain 4. The elastic covering 9 is prevented from contacting the load chain 4 by the guide action of the guide 14 provided between the load chain 4 and the elastic covering 9 during the up-and-down extending operation. Can be prevented. Further, according to the present embodiment, dust scattering prevention in the hoisting device provided with the stretchable covering for covering the load chain between the main body of the hoisting device of the load chain and the lower hook base installed at the lower end of the load chain. In the device, the upper part of the stretchable covering is attached to the upper frame 10 and the lower part is attached to the lower frame 11, and the upper frame is attached to the lower part of the box-shaped body that is attached to the hoisting device body and the upper part is open. In addition to the effects of the first embodiment, dust and the like generated when the hoisting machine is driven are collected by the dust receiver, since the integral stretch covering unit is formed and the lower frame is mounted on the lower hook base. Therefore, it is possible to provide a hoisting machine suitable for a clean room, and to attach a stretch coating to the dust receiver and to integrate the dust prevention device consisting of the dust receiver and the stretch coating into a unit. The dust prevention device with dust scattering prevention device can be easily attached to the existing hoisting device, the number of parts can be reduced, and the upper part of the dust receiver is opened, so the winding device can be easily visually observed It is possible to provide a dust scattering prevention device that can easily detect the presence or absence of a failure.

  In addition, in the second embodiment, a box-shaped dust receiver that is open at the top is adopted. However, if the upper end portion of the dust receiver is provided in close contact with the hoisting device body, further dust scattering can be prevented. Moreover, it is more preferable as a dust scattering prevention device to use a high-performance exhaust filter (hepa filter) for a part or all of the stretchable covering, or to attach a dust collector to the inside of the chain storage bucket or the dust receiver.

  The dust scattering prevention device in the hoisting device of the present invention comprises an expansion covering body covering the load chain between the main body of the hoisting device for hoisting and lowering the load chain and the lower hook base portion installed at the lower end of the load chain. In the dust scattering prevention device in the installed hoisting device, the upper part of the expansion / contraction covering is attached to the upper frame, the lower part is attached to the lower frame, and the upper frame is attached to the attachment frame attached to the hoisting device body, so Since it is continuously provided as a covering unit and easy to attach to the hoisting device, it is advantageous in attaching to the hoisting device at a high place.

The front view of the winding apparatus of Example 1 of this invention. The side view of FIG. The front view which shows an expansion-contraction covering body unit. FIG. 4 is a side view of FIG. 3. The side view which shows a lower hook attaching part. The side view which shows a chain storage bucket. The front view of the winding apparatus of Example 2 of this invention. The side view of FIG. The top view of the dust receiving part of FIG. The front view which shows the other form of a winding roller. The enlarged front view which shows a prior art example.

Explanation of symbols

1 rail 2 trolley 3 hoist 4 load chain 5 trolley motor 6 hoist drive motor 7 lower hook 8 load sheave 9 telescopic covering 10 upper frame 11 lower frame 12a, 12b, 12c take-up device 13 mounting frame 14 guide body 15 lower part Bracket 16 Locking portion 17 Mounting bracket 18 Mounting bolt 19 Guide roller 19a Guide roller 20 Mounting bracket 21 Unloaded chain storage bucket 21a Chain bucket edge 21b Chain bucket mounting portion 22 Bucket mounting bracket 23 Chile receiver 23a Rib 24 Support bracket 25 Opening portion 26 Mounting bracket 26a Mounting portion 27 Electrical component cover 28 Motor cover

Claims (5)

  In a dust scattering prevention device in a hoisting device provided with an elastic covering covering the load chain between the main body of the hoisting device for hoisting and lowering the load chain and the lower hook base installed at the lower end of the load chain, The upper part of the covering body is attached to the upper frame, the lower part is attached to the lower frame, and the upper frame is attached to the attachment frame attached to the hoisting device main body to form an integral stretch covering body unit. Dust scattering prevention device in equipment.   2. The dust scattering prevention device for a hoisting device according to claim 1, wherein the mounting frame is a box-shaped dust receiver having an open top.   The linear guide body winding device provided between the stretchable covering body and the load chain and guiding the stretchable covering body is integrally installed on the mounting frame as a unit. Dust scattering prevention device in the hoisting device.   4. The dust scattering prevention device for a hoisting device according to claim 3, wherein the winding device is provided so as to rotate in a horizontal direction.   An unloaded chain storage bucket with a wide upper part and a narrow lower part was installed on the mounting frame in close proximity to the elastic sheath and without interfering with the elastic sheath when the elastic sheath was moved up and down. The dust scattering prevention apparatus in the winding apparatus of Claims 1-4 characterized by these.

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