WO2018207946A1

WO2018207946A1 - Chain-driven conveyor

Info

Publication number: WO2018207946A1
Application number: PCT/JP2018/018502
Authority: WO
Inventors: 順香ノ木; 賢二伊藤; 洋一辻本
Original assignee: 川崎重工業株式会社
Priority date: 2017-05-12
Filing date: 2018-05-14
Publication date: 2018-11-15
Also published as: JP2018193139A

Abstract

A chain-driven conveyor having a drive chain revolving along a rail installed on the body frame of a boom extending in the conveyance direction of stocked articles, wherein the affixing member for installing the rail on the body frame is affixed via a cushioning material and has no contact with the body frame. As a result, transmission from the affixing member to the body frame of the vibration and noise of the drive chain revolving along the rail is checked, enabling a reduction in vibration and noise.

Description

Chain-driven conveyor

The present invention relates to a chain drive type conveyor.

Conventionally, for example, a chain drive type conveyor such as a scraper type reclaimer has been used for dispensing piled storage materials such as coal and iron ore. Hereinafter, a scraper type reclaimer will be described as an example of a chain drive type conveyor.

The scraper-type reclaimer circulates a drive chain with a scraper fixed along a rail provided on the main body frame, and pays out in a circumferential direction so as to scrape the surface of the stored material with this scraper. The stock dispensed by the scraper is transported to a desired place by another transport conveyor or the like.

As this type of prior art, for example, the angle of the boom (main body frame) is adjusted to the stacking surface of the stored item, and a substantially flat rake provided around the entire circumference of the boom is rotated by a rolling roller. There is one in which stored items are scraped downward and delivered to a conveyor (for example, see Patent Document 1).

Japanese Utility Model Publication No. 6-33845

By the way, in a chain drive type conveyor such as a scraper type reclaimer, the drive chain circulates along a rail provided on the main body frame, so that vibration and noise are generated by contact between the drive chain and the rail. Although there are places where this vibration and noise do not become a problem depending on the installation location of the chain drive conveyor and the surrounding environment, there is a demand to reduce depending on the installation location and the surrounding environment. In Patent Document 1, measures against vibration and noise are not taken.

Therefore, the present inventor has intensively studied the cause of the occurrence in order to reduce vibration and noise in the chain drive type conveyor. FIG. 6 is an enlarged sectional view showing a structure for attaching a rail to a main body frame in a conventional chain drive type conveyor. The rail 120 is attached to the main body frame 110 by fixing bolts 141 and nuts 143 provided at predetermined intervals, with a rubber plate 122 interposed between the rail 120 and the main body frame 110. In this example, a plain washer 144 and a spring washer 145 are provided and fixed between the nut 143 and the main body frame 110. The inventor has intensively studied the cause of vibration and noise in such a structure, and the cause of vibration and noise is that vibration and noise are generated between the drive chain 126 and the rail 120 that circulates. The vibration and noise were transmitted from the fixing bolt 141 to the main body frame 110 via the nut 143, and it was determined that the main body frame 110 was generating vibration and noise.

That is, the present inventor has conventionally thought that the vibration and noise of the rail 120 can be reduced by interposing the rubber plate material 122 between the rail 120 and the main body frame 110, but the rail 120 is attached to the main body frame 110. In the fixed portion, the rail 120 is directly connected to the main body frame 110 via the fixing bolt 141, the nut 143, the spring washer 145, and the flat washer 144, so that the drive chain 126 passes over the fixing bolt 141. The vibration and noise generated in the rail 120 are transmitted from the fixing bolt 141 to the main body frame 110 through the nut 143, the spring washer 145, and the flat washer 144, and it has been found that the main body frame 110 generates a large vibration and noise. .

The present invention is a chain-driven conveyor that can reduce this vibration and noise, and the structure thereof is a chain-driven conveyor that circulates a drive chain along a rail attached to a body frame of a boom that extends in the direction of transfer of stored items. And the fixing member which attaches the said rail to the said main body frame is attached via the shock absorbing material, without contacting the said main body frame. The “buffer material” in the document of this specification and the claims includes materials that can suppress vibration transmission, such as an elastic member, a flexible member, and a sound absorbing member.

With this configuration, the fixing member for attaching the rail to the main body frame is attached via the cushioning material, so that vibration and noise from the rail are prevented from being transmitted to the main body frame via the fixing member, and the main body frame is vibrated. Noise generation can be reduced.

Further, a plate-shaped cushioning material is interposed between the rail and the body frame, the cushioning material has a hollow portion into which the fixing member is inserted, and the body frame for attaching the rail to the body frame A holding member that is inserted between the fixing member and the cushioning material and that presses the cushioning material toward the body frame with a predetermined force.

If comprised in this way, a rail is a main body with the fixing member inserted in the hollow part of the buffer material inserted in the through-hole of the main body frame in the state by which the plate-shaped buffer material was interposed between the main body frames. Attached to the frame. For this reason, vibrations and noises generated by the drive chain that circulates along the rails are suppressed from being transmitted to the main body frame by these cushioning materials, and the main body frame can be reduced from generating vibrations and noises.

In addition, the buffer material includes an insertion portion that is inserted through the through hole of the main body frame, and a buffer portion that is in contact with a surface opposite to the rail placement surface of the main body frame, and the holding member is the buffer portion A pressing portion that presses the main body frame, and a pressing amount adjusting portion that contacts the rail in a state where the buffer portion is pressed by a predetermined amount. The “pressing amount adjusting portion” in the specification and claims refers to a portion that determines the pressing amount of the buffer portion.

If comprised in this way, the buffer part of a buffer material will be pressed toward a main body frame with the press part of a holding member, and the pressing amount adjustment part of a holding member will be contacted to a rail, and the press of a press part by a holding member will be carried out. The amount is determined. As a result, the pressing amount by which the buffer member is pressed against the main body frame by the fixing member via the pressing portion of the holding member becomes constant, and the buffer member is fixed to the predetermined pressing amount defined by the size of the pressing amount adjusting unit. The rail can be attached to the main body frame while being pressed by pressure. In addition, the necessary tightening torque can be maintained regardless of dimensional changes due to vibration of the cushioning material.

Further, the insertion portion is formed in a cylindrical shape having the hollow portion, the buffer portion is formed in a disk shape larger than the diameter of the insertion portion at an end portion of the insertion portion, and the pressing amount adjustment portion is The pressing portion is formed in a disc shape that presses the disc-shaped buffer portion, and the fixing member is inserted in the hollow portion of the pressing amount adjusting portion. The bolt member may be configured.

If constituted in this way, by inserting a cylindrical pressing amount adjusting part into the hollow part in the insertion part of the cushioning material, inserting a bolt member into the hollow part of the pressing amount adjusting part, and attaching the rail to the main body frame, The rail can be attached without the bolt member coming into contact with the main body frame in a state where the buffer portion formed in the disk shape of the cushioning material is uniformly pressed against the main body frame by the pressing portion formed in the disk shape of the holding member. it can.

The buffer material may be an elastic member, a plastic member that absorbs vibration, a sound absorbing member, or a combination of the elastic member and the plastic member or the sound absorbing member.

With such a configuration, even when large vibrations and noises are received, the vibrations and noises can be reduced by greatly attenuating the transmission to the main body frame by the cushioning material.

According to the present invention, it is possible to suppress the vibration of the rail in contact with the drive chain from being transmitted from the fixed member portion to the main body frame, and to reduce the vibration and noise in the chain drive conveyor.

FIG. 1 is a side view of a scraper type reclaimer which is an embodiment of a chain drive type conveyor according to the present invention. FIG. 2 is an enlarged sectional view taken along the line II-II shown in FIG. FIG. 3 is an enlarged cross-sectional view taken along the line III shown in FIG. FIG. 4 is an enlarged cross-sectional view taken along arrows IV-IV shown in FIG. FIG. 5 is an enlarged cross-sectional view of a different example in the same cross section as FIG. FIG. 6 is an enlarged sectional view showing a structure for attaching a rail to a main body frame in a conventional chain drive type conveyor.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Also in the following embodiments, the scraper type reclaimer 1 will be described as an example. The concept of the front-rear direction in the document of this specification and the claims is the front-rear direction shown in FIG. 1, and the concept of the left-right direction is the left-right direction shown in FIG.

(Configuration of scraper type reclaimer)
FIG. 1 is a side view of a scraper type reclaimer 1 which is an embodiment of a chain drive type conveyor. FIG. 2 is an enlarged sectional view taken along the line II-II shown in FIG. As shown in FIG. 1, the scraper type reclaimer 1 of this embodiment includes a traveling machine body 2 having a traveling roller 3 that travels on a traveling rail (not shown), and a scraping direction (transfer) of the stored item 100 from the upper part of the traveling machine body 2. A support arm 4 extending in the direction), and a boom 5 extending from the traveling machine body 2 in the direction of the stored item 100. A boom hanger 6 provided at the front end is suspended from a boom 5 by a suspension wire 7 suspended from a support arm 4. The boom 5 is supported by the traveling machine body 2 at the rear end, and by adjusting the length of the suspension wire 7, the front end can be lifted up and down with the rear end as a fulcrum. Thereby, the angle of the boom 5 can be adjusted so that the stacking angle of the stored item 100 may be met.

The boom 5 includes a main body frame 10 having a truss-structured frame material 9. The main body frame 10 has a plurality of scrapers 28 that are circulated around by a drive chain (FIG. 2). The plurality of scrapers 28 are attached to the drive chain 26 at a predetermined interval, and are stored by rotating the drive chain 26 along the main body frame 10 by a drive motor (not shown) provided at the rear end of the main body frame 10. The object 100 is paid out in the direction of the arrow (from the front to the rear of the boom 5).

As shown in FIG. 2, the main body frame 10 is provided with

chain running portions

11 and 12 around which the drive chain 26 circulates at the upper part and the lower part. These

chain running portions

11 and 12 are connected by a frame material 9.

Rails

20 and 21 are attached to the

chain travel portions

11 and 12 where the drive chain 26 (shown in the figure shows the chain roller 27 of the drive chain 26) travels. In this example, rails 20 and 21 are attached to the upper and lower portions of the

chain running portions

11 and 12, respectively. The scraper 28 is fixed to a support bracket 29 provided from the axial center portion of the chain roller 27 of the drive chain 26 toward the outside of the main body frame 10. The

rails

20 and 21 may be metal rails or surface-treated rails, and the material is not limited.

According to such a scraper type reclaimer 1, as shown in FIG. 1, the angle of the boom 5 is adjusted to the stacking angle of the stored item 100, and the drive chain 26 circulates along the main body frame 10. As a result, the plurality of scrapers 28 are caused to circulate along the

chain travel portions

11 and 12, and the stored items 100 can be scraped off in the direction of the traveling machine body 2 by the scrapers 28. Then, the scraped stored material 100 is delivered to a conveyor 60 provided in the vicinity of the traveling machine body 2, and is transported to a desired place by the conveyor 60.

(Rail mounting structure)
FIG. 3 is an enlarged cross-sectional view taken along the line III shown in FIG. FIG. 4 is an enlarged cross-sectional view taken along arrows IV-IV shown in FIG. Based on these drawings, the chain traveling portion 11 on the lower left side in FIG. 2 will be described in detail. As shown in FIG. 3, rails 20 and 21 are respectively attached to the chain traveling portion 11 of the main body frame 10 at the upper and lower portions of the portion of the drive chain 26 where the chain roller 27 travels. The upper rail 21 comes into contact with the drive chain 26 when an upward force is applied to the drive chain 26 by the force when scraping the stored item 100 with the scraper 28. The lower rail 20 contacts the drive chain 26 when a downward force such as the weight of the drive chain 26 is applied. Both rails 20 and 21 are provided with

rubber plate materials

22 and 23, which are plate-like cushioning materials, between the chain running portion 11 and the rail running portions 11, respectively.

The chain travel part 11 is provided with a through-hole 13 having a predetermined size in a portion through which a bolt member 40 as a fixing member for attaching the

rails

20 and 21 is inserted. The diameter of the through hole 13 is the same as the diameter of the insertion portion 31 of the cushioning material 30 to be described later, and is a size that allows the insertion portion 31 to be inserted. The

rubber plate members

22 and 23 are provided with through holes 25 larger than the through holes 13 at portions where the bolt members 40 for fixing the

rails

20 and 21 are inserted.

And as shown also in FIG. 4, the shock absorbing material 30 is provided in the part of the bolt member 40 which attaches these

rails

20 and 21 to the chain running part (main body frame 10) 11. As shown in FIG. The chain travel part 11 of the main body frame 10 is provided with a through hole 13 through which the insertion part 31 of the cushioning material 30 is inserted. The cushioning material 30 includes an insertion portion 31 formed to have an outer diameter that is inserted into the through hole 13 of the chain traveling portion 11, and a cushioning portion 32 that contacts the surface opposite to the rail arrangement surface of the chain traveling portion 11. Yes. The insertion portion 31 is formed in a cylindrical shape having a hollow portion 33. The outer diameter of the insertion portion 31 is formed to be an outer diameter that can be inserted into the through hole 13 of the chain running portion 11. The inner diameter of the insertion portion 31 is formed to be an inner diameter into which the pressing amount adjusting portion 52 of the collar 50 as a holding member is inserted. The buffer portion 32 is formed in a disc shape larger than the diameter of the insertion portion 31 at the end of the insertion portion 31. The buffer material 30 of this embodiment can be formed of, for example, natural rubber or synthetic rubber. The buffer material 30 may be any material that can suppress vibration transmission, and may be an elastic member, a plastic member that absorbs vibration, a sound absorbing member, or a combination of these elastic member, plastic member, and sound absorbing member. . By using the combined cushioning material 30, even if large vibrations or noises are transmitted to the main body frame 10, it can be greatly attenuated.

Between the cushioning material 30 and the bolt member 40, a collar 50 is provided as a holding member that presses the cushioning material 30 toward the chain running portion 11 with the bolt member 40 with a predetermined force. The collar 50 includes a disk-shaped pressing portion 51 that presses the buffer portion 32 of the buffer material 30 toward the chain travel portion 11, and a cylindrical shape that is inserted into a hollow portion 33 formed in the insertion portion 31 of the buffer material 30. And a pressing amount adjusting unit 52. The cylindrical pressing amount adjusting unit 52 is set to a dimension H that abuts against the

rails

20 and 21 in a state where the buffering unit 32 of the buffering material 30 is pressed by a predetermined amount against the chain traveling unit 11. By setting the dimension H to the pressing amount adjusting portion 52, the tightening amount of the bolt member 40 is made constant, and the pressing force (compression amount) by the buffer portion 32 of the buffer material 30 is made constant. A through hole 53 through which the bolt member 40 is inserted is provided at the center of the collar 50 from the pressing portion 51 to the pressing amount adjusting portion 52. The collar (holding member) 50 may be formed integrally with the disk-shaped pressing portion 51 and the cylindrical pressing amount adjusting portion 52 as in this embodiment, or may be configured separately. .

The bolt member 40 includes a countersunk bolt 41 inserted into the through hole 53 of the collar 50 from the bolt hole (sink hole) 24 of the

rails

20 and 21 and a locking nut 43 that is screwed into the threaded portion 42 of the countersunk bolt 41. It is configured. The locking nut 43 in this example is a double nut. The locking method may be a combination with a normal spring washer or the like, and is not particularly limited. By this bolt member 40, the cost of the structure which attaches the

rails

20 and 21 to the chain running part 11 (10) in many places (for example, several hundred places) can be held down. Moreover, the mounting work of the

rails

20 and 21 can be efficiently performed with a general tool. The

rails

20 and 21 attached to the upper and lower portions of the

chain running portions

11 and 12 at the left and right positions are similarly attached. As the locking nut 43, for example, a U-nut (registered trademark), a hard lock (registered trademark) nut, or the like can be used.

As described above, the cushioning material 30 has the insertion portion 31 inserted into the through hole 13 of the chain traveling portion 11 and the pressing amount of the collar 50 in a state where the cushioning portion 32 is in contact with the chain traveling portion 11 (main body frame 10). The adjustment portion 52 is inserted into the hollow portion 33 of the insertion portion 31 of the cushioning material 30. Then, the countersunk bolt 41 is inserted from the bolt hole 24 of the

rails

20 and 21 into the cylindrical portion of the pressing amount adjusting unit 52 of the collar 50 in a state where the pressing unit 51 is in contact with the buffering unit 32 of the buffering material 30. Thereafter, the locking nut 43 is screwed in until the pressing amount adjusting portion 52 contacts the

rails

20 and 21, and the rail 20 is attached to the chain running portion (main body frame 10) 11. Thereby, the rail 20 (21) can be attached to the main body frame 10 in a state where the chain running portion (main body frame 10) 11 is pressed evenly by the buffer portion 32 of the buffer material 30.

According to the rail 20 (21) attached in this manner, the main body frame 10 is located at the portion of the flat bolt 41 that is a fixing member attached to the main body frame 10 with the rubber plate material 22 interposed between the main body frame 10 and the rail 20 (21). It is attached via a collar 50 as a holding member between the cushioning material 30 as a cushioning material inserted into the through hole 13. Therefore, the bolt member 40 in contact with the rail 20 is in contact with the collar 50 inserted into the insertion portion 31 of the cushioning material 30, but the cushioning material in contact with the chain running portion 11 of the main body frame 10 is in contact with the pressing portion 51 of the collar 50. It is attached via 30 buffer parts 32. At this time, since the bolt member 40 is tightened with respect to the collar 50, the tightening margin is constant regardless of the deformation of the cushioning material 30. Therefore, since the bolt member 40 is appropriately fixed with a necessary tightening torque regardless of the deformation of the cushioning material 30, the rail 20 is fixed to the main body frame 10 without loosening while having a motion allowance. Even if the drive chain 26 that circulates along the rail 20 abuts on the rail 20 to generate vibration and noise, the vibration and noise are not transmitted from the bolt member 40 to the main body frame 10. The vibration and noise generated by the main body frame 10 can be reduced through the buffer portion 32, the insertion portion 31, and the like. In particular, vibration and noise generated in the metal rail 20 can be reduced. Therefore, vibration and noise in the scraper type reclaimer (chain drive conveyor) 1 can be reduced. At the same time, the bolt member 40 is not loosened by the deformation of the cushioning material 30, so that the bolt member 40 is unlikely to come off and it is not necessary to use an expensive loosening stopper. In addition, although FIG. 4 demonstrated the left lower part of the chain running part 11 as an example, the other parts of the

chain running parts

11 and 12 are the same.

(Different rail mounting structure)
FIG. 5 is an enlarged cross-sectional view of a different example in the same cross section as FIG. In this example, a buffer material 35 different from the buffer material 30 of FIG. 4 is used. The same components as those in FIG. 4 are denoted by the same reference numerals, and detailed description thereof is omitted. The cushioning material 35 of this example is provided with a sandwiching portion 37 that sandwiches the portion of the through hole 13 of the chain running portion 11 (main body frame 10) with the cushioning portion 32 in the insertion portion 36. According to the cushioning material 35, the insertion portion 36 is inserted into the through hole 13 of the chain traveling portion 11, so that the chain traveling portion 11 (main body frame 10) is sandwiched between the buffer portion 32 and the clamping portion 37. Can do. Therefore, the position of the cushioning material 35 can be maintained by inserting the insertion portion 36 into the through hole 13. Since the other structure and operation of the buffer material 35 are the same as those of the buffer material 30, description thereof is omitted. Also in this example, the rail 20 is attached with the rubber plate material 22 interposed between the chain traveling portion 11 and the rail 20. In FIG. 5, the lower left side of the chain traveling portion 11 has been described as an example, but the other portions of the

chain traveling portions

11 and 12 are the same.

The rail 20 attached in this way also has the rubber plate material 22 interposed between the rail 20 and the main body frame 10, and in the portion of the flat bolt 41 of the bolt member 40 attached to the main body frame 10, the through hole 13 of the main body frame 10 is provided. It is attached via a collar 50 between the cushioning material 30 inserted into the. Accordingly, the countersunk bolt 41 in contact with the rail 20 is in contact with the collar 50 inserted into the insertion portion 36 of the cushioning material 35, but the cushioning material in contact with the chain running portion 11 of the main body frame 10 is in contact with the pressing portion 51 of the collar 50. It is attached via 30 buffer parts 32. For this reason, even if the drive chain 26 that circulates along the rail 20 abuts on the rail 20 and generates vibration, it is possible to prevent the vibration from being transmitted from the bolt member 40 to the main body frame 10, and the vibration generated by the main body frame 10. Noise can be reduced. Therefore, vibration and noise in the scraper type reclaimer (chain drive conveyor) 1 can be reduced.

(Modification)
The buffer materials 30 to 37 described above are examples, and the material and shape of the buffer material are not limited to the above-described embodiment. For example, in addition to an elastic member such as a rubber plate having an appropriate hardness, vibration of the

rails

20 and 21 such as a plastic member that absorbs vibration, a sound absorbing member, a combination thereof, a soft resin, a non-woven fabric, etc. What suppresses noise generation at 9 can be used.

The bolt member 40 as the fixing member described above is also an example, and is not limited to the countersunk bolt 41, and may be any configuration as long as the

rails

20 and 21 can be attached so as not to prevent the drive chain 26 from turning around. . The double nut of the locking nut 43 is also an example, and may have any similar function, and is not limited to the above embodiment.

Furthermore, the above-described scraper type reclaimer 1 shows one embodiment, and any other type such as a chain driven type reclaimer can be applied as long as it is a chain driven type conveyor. The present invention is not limited to the scraper type reclaimer 1. .

DESCRIPTION OF SYMBOLS 1 Scraper type reclaimer 2 Traveling machine body 4 Support arm 5 Boom 9 Frame material 10

Main body frame

11, 12 Chain traveling part 13 Through

hole

20, 21

Rail

22, 23 Rubber plate material 24 Bolt hole 25 Through hole 26 Drive chain 27 Chain roller 28 Scraper 29 Support bracket 30 Buffer material 31 Insertion portion 32 Buffer portion 33 Hollow portion 35 Buffer material 36 Insertion portion 37 Holding portion 40 Bolt member (fixing member)
41 Countersunk bolt 43 Locking nut 50 Collar 51 Pressing part 52 Pressing amount adjusting part 53 Through hole 100 Stored item

Claims

A chain-driven conveyor that circulates a drive chain along rails attached to a boom body frame extending in the direction of storage transfer,
The fixing member for attaching the rail to the main body frame is attached via a cushioning material without contacting the main body frame,
A chain-driven conveyor characterized by that.
A plate-shaped cushioning material is interposed between the rail and the main body frame,
The cushioning material has a hollow portion into which the fixing member is inserted, and is inserted into a through hole of the main body frame for attaching the rail to the main body frame,
A holding member that is disposed between the fixing member and the cushioning material and presses the cushioning material toward the main body frame with a predetermined force;
The chain-driven conveyor according to claim 1.
The cushioning material has an insertion portion that is inserted through the through hole of the body frame, and a cushioning portion that is in contact with the surface opposite to the rail placement surface of the body frame,
The holding member includes a pressing portion that presses the buffer portion against the main body frame, and a pressing amount adjusting portion that contacts the rail while pressing the buffer portion by a predetermined amount.
The chain drive type conveyor according to claim 2.
The insertion portion is formed in a cylindrical shape having the hollow portion,
The buffer portion is formed in a disk shape larger than the diameter of the insertion portion at the end of the insertion portion,
The pressing amount adjusting portion is formed in a cylindrical shape inserted into the hollow portion,
The pressing portion is formed in a disc shape that presses the disc-shaped buffer portion,
The fixing member is composed of a bolt member that is inserted into a hollow portion of the pressing amount adjusting unit.
The chain drive type conveyor according to claim 3.
The buffer material is an elastic member, a plastic member that absorbs vibration, a sound absorbing member, or a combination of the elastic member and the plastic member or the sound absorbing member.
The chain-driven conveyor according to any one of claims 1 to 4.