WO2014156413A1 - Chain - Google Patents

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Publication number
WO2014156413A1
WO2014156413A1 PCT/JP2014/054294 JP2014054294W WO2014156413A1 WO 2014156413 A1 WO2014156413 A1 WO 2014156413A1 JP 2014054294 W JP2014054294 W JP 2014054294W WO 2014156413 A1 WO2014156413 A1 WO 2014156413A1
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WO
WIPO (PCT)
Prior art keywords
chain
link
link plate
longitudinal direction
intermediate portion
Prior art date
Application number
PCT/JP2014/054294
Other languages
French (fr)
Japanese (ja)
Inventor
裕樹 石田
健太郎 山根
勇志 阿部
Original Assignee
株式会社椿本チエイン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社椿本チエイン filed Critical 株式会社椿本チエイン
Priority to CN201480015393.1A priority Critical patent/CN105051412B/en
Priority to KR1020157027278A priority patent/KR101777492B1/en
Publication of WO2014156413A1 publication Critical patent/WO2014156413A1/en
Priority to HK16102979.3A priority patent/HK1215062A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G13/00—Chains
    • F16G13/02—Driving-chains
    • F16G13/06—Driving-chains with links connected by parallel driving-pins with or without rollers so called open links
    • F16G13/07—Driving-chains with links connected by parallel driving-pins with or without rollers so called open links the links being of identical shape, e.g. cranked
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
    • B65G17/30—Details; Auxiliary devices
    • B65G17/38—Chains or like traction elements; Connections between traction elements and load-carriers

Definitions

  • the present invention relates to a chain used for conveying articles and transmitting power.
  • This type of chain is constructed by connecting a plurality of links consisting of a pair of link plates in series. Of the adjacent links, the front end of one link is rotatably connected to the rear end of the other link. The chain travels in one direction by being pulled in the longitudinal direction of the chain.
  • Patent Document 1 discloses an offset chain constituted by one type of link in which the distance between link plates is different between the front end and the rear end of the link. According to this type of chain, one link of adjacent links is inserted with the end with the smaller interval between the link plates inserted into the end with the larger interval between the link plates of the other link. , Connected to the other link.
  • each link plate has an intermediate portion extending obliquely with respect to the longitudinal direction of the chain between the front end and the rear end of the link plate. Due to such a configuration, when the chain is pulled in the longitudinal direction, stress concentrates in the intermediate part of each link plate, and the intermediate part may be deformed.
  • An object of the present invention is to provide a chain that can suppress deformation of the link plate.
  • a chain configured by connecting a plurality of links formed of a pair of link plates in series.
  • the front end of one link is rotatably connected to the rear end of the other link.
  • the chain travels in one direction by being pulled in the longitudinal direction of the chain.
  • the link plate has a first end, a second end located on the opposite side of the first end, and an intermediate portion provided between the first end and the second end.
  • the first end and the second end each extend in the longitudinal direction of the chain, and the intermediate portion intersects the longitudinal direction of the chain.
  • the thickness of the intermediate part is larger than the thickness of the first end part and the second end part.
  • the link plate When the chain is running, the link plate is pulled in the longitudinal direction of the chain. In this case, the stress tends to concentrate on an intermediate portion extending obliquely with respect to the longitudinal direction of the chain. Therefore, there is a possibility that the intermediate portion is deformed.
  • the thickness of the intermediate portion of the link plate is larger than the thickness of the first end portion and the second end portion of the link plate. For this reason, the intensity
  • the intermediate portion includes a first intersecting portion and a second intersecting portion, the first intersecting portion intersects at a first angle with respect to the longitudinal direction of the chain, and the second intersecting portion is the longitudinal direction of the chain.
  • the first intersection intersects with a second angle smaller than the first angle, and the thickness of the first intersection is greater than the thickness of the second intersection.
  • the intermediate portion includes the first intersection and the second intersection.
  • the intersection angle of the first intersection with respect to the longitudinal direction is larger than the intersection angle of the second intersection.
  • the thickness of the first intersection is greater than the thickness of the second intersection. Accordingly, even when the link plate is pulled in the longitudinal direction of the chain and stress is concentrated on the intermediate portion, deformation of the first intersecting portion and the second intersecting portion can be suppressed.
  • the crossing angle of the intermediate part with respect to the first end part and the crossing angle of the intermediate part with respect to the second end part are both obtuse.
  • the link plate is pulled in the longitudinal direction of the chain as compared to the configuration in which the connection portion of the first end portion and the intermediate portion and the connection portion of the second end portion and the intermediate portion are bent. Can be prevented from being deformed.
  • a through hole is formed in the first end portion of the link plate, an annular convex portion is formed in the periphery of the through hole in the first end portion, and the convex portion has a thickness from the link plate. It is preferable to protrude in the direction.
  • the convex portion functions as a reinforcing rib by forming the annular convex portion at the periphery of the hole at the first end portion of the link plate. Thereby, the strength at the first end of the link plate can be maintained.
  • the thickness of the intermediate portion is made larger than that of the first end portion and the second end portion, and the hole is formed in the intermediate portion. For this reason, it is possible to reduce the weight of the link plate while suppressing the link plate from being pulled and deformed in the moving direction of the chain.
  • the disassembled perspective view which shows one Embodiment which actualized the chain of this invention.
  • the partially broken top view of a chain The partial schematic diagram which shows the assembly method of a chain.
  • the perspective view of the link plate which comprises a chain.
  • the chain 11 is configured by connecting a plurality of links 13 including a pair of link plates 12 in series. Of the adjacent links 13, the front end of one link 13 is rotatably connected to the rear end of the other link 13.
  • the chain 11 includes a plurality of links 13, a cylindrical bush 14, and a columnar pin 15.
  • the bush 14 is assembled to the pair of link plates 12 so as to maintain a distance between the link plates 12.
  • the pin 15 is inserted through the bush 14 so as to rotatably connect the adjacent links 13.
  • one link 13 is inserted in a state where an end portion with a smaller interval between the link plates 12 is inserted into an end portion with a larger interval between the link plates 12 of the other link 13. Adjacent to the link 13.
  • the pins 15 are inserted into the bushes 14 so that the links 13 are sequentially connected in the longitudinal direction X of the chain 11.
  • the chain 11 is used for conveying articles and transmitting power, for example. In this case, the chain 11 travels in one direction by being pulled in the longitudinal direction X of the chain 11.
  • the longitudinal direction X of the chain 11 coincides with the moving direction of the chain 11.
  • the link plate 12 is made of steel or the like and is formed in a substantially rectangular shape by forging. Both ends of the link plate 12 are portions connected to the link plate 12 of the other links 13 and are rounded.
  • the link plate 12 includes a first end portion 20 and a second end portion 21 that extend in the longitudinal direction X, and an intermediate portion 22 that is provided between the first end portion 20 and the second end portion 21 and intersects the longitudinal direction X. And have.
  • the first end 20 of the intermediate part 22 is bent inward from the second end 21. Therefore, the interval between the first ends 20 of both link plates 12 is narrower than the interval between the second ends 21 of both link plates 12.
  • the link plate 12 functions as a link plate for the inner link of the flat type chain near the first end portion 20. Moreover, the link plate 12 functions as a link plate for the outer link of the flat type chain in the vicinity of the second end portion 21.
  • the chain 11 can be said to be an offset type chain in which the distance between the link plates 12 is different between the front end and the rear end of the link 13.
  • the thickness of the intermediate portion 22 is larger than the thickness of the first end portion 20 and the second end portion 21.
  • the thickness of the first end 20 is the same as the thickness of the second end 21.
  • the intermediate portion 22 includes a first intersecting portion 22a and a second intersecting portion 22b.
  • the first intersection 22a intersects the first end 20 at a first angle.
  • the second intersecting portion 22b intersects the second end portion 21 at a second angle smaller than the first angle.
  • the thickness of the first intersecting portion 22a is larger than the thickness of the second intersecting portion 22b.
  • the crossing angle of the intermediate part 22 with respect to the first end part 20 and the crossing angle of the intermediate part 22 with respect to the second end part 21 are both obtuse angles. That is, the first intersecting portion 22 a intersects the first end portion 20 and the second end portion 21 at an obtuse angle.
  • the second intersecting portion 22b also intersects the first end portion 20 and the second end portion 21 at an obtuse angle.
  • a circular bush insertion hole 23 into which the bush 14 shown in FIG. 1 is fitted is formed in the first end 20 of the link plate 12.
  • the bush insertion hole 23 penetrates the link plate 12 in the thickness direction.
  • an annular annular convex portion 24 surrounding the bush insertion hole 23 is formed at the first end portion 20 of the link plate 12.
  • the annular protrusion 24 protrudes outward from the outer surface 20 a of the link plate 12.
  • a pin insertion hole 25 into which the pin 15 shown in FIG. 1 is fitted is formed in the second end portion 21 of the link plate 12.
  • the pin insertion hole 25 penetrates the link plate 12 in the thickness direction.
  • the diameter of the pin insertion hole 25 is smaller than the diameter of the bush insertion hole 23.
  • a substantially rectangular hole 26 is formed in the intermediate portion 22.
  • the link plate 12 has a step portion 21 b having a semicircular arc shape on the inner surface 21 a of the second end portion 21.
  • the outer diameter of both end portions 14a of the bush 14 is smaller than the outer diameter of the intermediate portion 14b.
  • the outer diameter of both end portions 14 a of the bush 14 is set so as to be fitted into the bush insertion hole 23.
  • the outer diameter of both end portions 14 a of the bush 14 is slightly smaller than the inner diameter of the annular convex portion 24.
  • the outer diameter of the intermediate portion 14 b of the bush 14 is slightly larger than the inner diameter of the bush insertion hole 23.
  • the pin 15 has a proximal end portion 15a, an intermediate portion 15c, and a distal end portion 15b arranged on the same axis.
  • the outer diameter of the base end portion 15a is larger than the outer diameter of the distal end portion 15b.
  • the outer diameter of the intermediate portion 15c is smaller than the outer diameter of the base end portion 15a and larger than the outer diameter of the distal end portion 15b.
  • the outer diameter of the intermediate portion 15 c is set so that it can be inserted into the pin insertion hole 25.
  • the outer diameter of the base end portion 15 a is slightly larger than the diameter of the pin insertion hole 25.
  • the inner diameter of the bush 14 is slightly larger than the inner diameter of the pin insertion hole 25.
  • the pin insertion hole 25 has substantially the same diameter as the intermediate portion 15 c of the pin 15, the inner diameter of the bush 14 is larger than that of the intermediate portion 15 c to keep lubricating oil between the bush 14 and the pin 15. This is because it needs to be slightly increased.
  • the first end portion 20 of the pair of link plates 12 constituting the first link 13 is replaced with the second end of the pair of link plates 12 constituting the second link 13. Insert between the end portions 21.
  • the position of the first link 13 is determined by bringing the seal ring 32 of the first link 13 into contact with the stepped portion 21 b of the link plate 12 constituting the second link 13.
  • the base end portion 15 a of the pin 15 is brought into contact with the outer surface of one link plate 12 constituting the second link 13. Further, the tip portion 15 b of the pin 15 protrudes outward from the outer surface of the other link plate 12 constituting the second link 13. Thereafter, the tip 15b of the pin 15 is caulked in order to prevent the pin 15 from being removed from the pin insertion hole 25 of the link plate 12.
  • the pin 15 is rotatably held with respect to both the bush 14 attached to the first link 13 and the pin insertion hole 25 of the second link 13.
  • the first link 13 is rotatably connected to the second link 13 via the pin 15.
  • the chain 11 is completed by connecting the plurality of links 13 in series.
  • the chain 11 is formed in an annular shape and used by being wound around a sprocket (not shown). For this reason, when the sprocket rotates, the chain 11 is pulled in the longitudinal direction X of the chain 11 and travels in one direction. For example, if a plurality of buckets (not shown) are attached to the chain 11 at equal intervals, they can be used for unloading articles such as coal and iron ore loaded on a tanker.
  • the thickness of the intermediate portion 22 of the link plate 12 is larger than the thickness of the first end portion 20 and the second end portion 21.
  • the strength of the intermediate portion 22 of the link plate 12 is higher than the strength of the first end portion 20 and the second end portion 21. Therefore, even if stress concentrates on the intermediate portion 22 of the link plate 12, the deformation of the intermediate portion 2 is suppressed, and the deformation of the link plate 12 is suppressed. Therefore, since the deformation of the chain 11 is suppressed, the durability of the chain 11 is improved.
  • the thickness of the link plate 12 When the thickness of the link plate 12 is increased, the strength of the link plate 12 is improved. However, since the weight of the link plate 12 increases, the traveling speed of the chain 11 becomes slow.
  • only the thickness of the intermediate portion 22 is made larger than that of the first end portion 20 and the second end portion 21, and the hole 26 is formed in the intermediate portion 22. Thereby, weight reduction of the link plate 12 can be achieved, maintaining the intensity
  • the bush insertion hole 23 formed in the first end 20 of the link plate 12 is larger than the pin insertion hole 25 formed in the second end 21. For this reason, the rigidity at the first end 20 may be lower than the rigidity at the second end 21.
  • the annular convex portion 24 is formed on the periphery of the bush insertion hole 23 of the first end portion 20. Since the annular convex portion 24 functions as a reinforcing rib, a decrease in rigidity at the first end portion 20 is suppressed.
  • the link plate 12 When the chain 11 travels, the link plate 12 is pulled in the longitudinal direction X, which is the direction of circular movement of the chain 11. In this case, the stress tends to concentrate on the intermediate portion 22 of the link plate 12 extending obliquely with respect to the longitudinal direction X. Therefore, there exists a possibility that the intermediate part 22 may deform
  • the thickness of the intermediate portion 22 of the link plate 12 is larger than the thickness of the first end portion 20 and the second end portion 21. For this reason, the strength of the intermediate portion 22 of the link plate 12 can be made higher than the strength of the first end portion 20 and the second end portion 21. Therefore, even if stress concentrates on the intermediate portion 22 of the link plate 12, deformation of the intermediate portion 22 and the link plate 12 can be suppressed.
  • the intermediate portion 22 includes the first intersecting portion 22a and the second intersecting portion 22b. Further, the intersection angle of the first intersection 22a with respect to the longitudinal direction X of the chain 11 is larger than the intersection angle of the second intersection 22b. Furthermore, the thickness of the first intersection 22a is larger than the thickness of the second intersection 22b. Accordingly, even when the link plate 12 is pulled in the longitudinal direction X of the chain 11 and stress is concentrated on the intermediate portion 22, deformation of the first intersecting portion 22a and the second intersecting portion 22b can be suppressed.
  • intersection angle of the intermediate portion 22 with respect to the first end portion 20 and the intersection angle of the intermediate portion 22 with respect to the second end portion 21 are both obtuse angles. Therefore, when the link plate 12 is pulled in the longitudinal direction X as compared with the configuration in which the connection portion of the first end portion 20 and the intermediate portion 22 and the connection portion of the second end portion 21 and the intermediate portion 22 are bent. It is possible to suppress the intermediate portion 22 from being deformed.
  • the first end portion 20 of the link plate 12 is formed with an annular annular convex portion 24 surrounding the bush insertion hole 23.
  • the annular protrusion 24 is provided at the periphery of the bush insertion hole 23 and protrudes outward from the outer surface 20 a of the link plate 12.
  • the annular convex portion 24 functions as a reinforcing rib, the strength of the first end portion 20 of the link plate 12 can be maintained. In other words, the strength reduction of the link plate 12 due to the bush insertion hole 23 can be reinforced by the annular protrusion 24.
  • the hole 26 may be omitted from the link plate 12.
  • the position of the hole 26 formed in the link plate 12 may be near the first end 20 or the second end 21 in addition to the intermediate portion 22. Moreover, you may change suitably the magnitude
  • the annular protrusion 24 may be omitted from the link plate 12.
  • either one of the first intersection 22a and the second intersection 22b may be omitted from the intermediate portion 22 of the link plate 12.
  • the intermediate part 22 of the link plate 12 may be curved from the first end part 20 to the second end part 21.
  • the intermediate portion 22 may be formed so that the thickness of the intermediate portion 22 decreases as the first end portion 20 approaches the second end portion 21.
  • the intermediate part 22 of the link plate 12 may be formed so as to extend in a direction orthogonal to the longitudinal direction X. That is, the link plate 12 may be formed in a crank shape so that the intermediate portion 22 is orthogonal to the first end portion 20 and the second end portion 21.
  • the crossing angle of the intermediate portion 22 with respect to the first end portion 20 and the crossing angle of the intermediate portion 22 with respect to the second end portion 21 may each be an acute angle.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chain Conveyers (AREA)
  • Transmission Devices (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Abstract

A chain (11) is formed by serially connecting links (13) each composed of a pair of link plates (12). The front end of one link (13) of adjacent links (13) is pivotally connected to the rear end of the other link (13). The chain (11) travels in one direction by being pulled in the longitudinal direction of the chain (11). Each of the link plates (12) has: a first end section (20) and a second end section (21), which extend in the longitudinal direction (X) of the chain (11); and an intermediate section (22) which is provided between the first end section (20) and the second end section (21) and which intersects the longitudinal direction (X). The thickness of the intermediate section (22) is greater than the thickness of both the first end section (20) and the second end section (21).

Description

チェーンchain
　本発明は、物品の搬送や動力の伝達に用いられるチェーンに関する。 The present invention relates to a chain used for conveying articles and transmitting power.
　この種のチェーンは、一対のリンクプレートからなる複数のリンクを直列に連結して構成されている。隣接するリンクのうち一方のリンクの前端は、他方のリンクの後端に対して回動可能に連結されている。チェーンは、チェーンの長手方向に引っ張られることで、一方向に走行する。 This type of chain is constructed by connecting a plurality of links consisting of a pair of link plates in series. Of the adjacent links, the front end of one link is rotatably connected to the rear end of the other link. The chain travels in one direction by being pulled in the longitudinal direction of the chain.
　例えば、リンクの前端と後端とでリンクプレート間の間隔が一定であるフラットタイプのチェーンが挙げられる。フラットタイプのチェーンでは、リンクプレート間の間隔が相対的に狭い内リンクと、リンクプレート間の間隔が相対的に広い外リンクといった２種類のリンクを用意する必要がある。 For example, there is a flat type chain in which the distance between the link plates is constant at the front end and the rear end of the link. In a flat type chain, it is necessary to prepare two types of links, an inner link having a relatively narrow interval between link plates and an outer link having a relatively wide interval between link plates.
　特許文献１は、リンクの前端と後端とでリンクプレート間の間隔が異なる１種類のリンクにより構成したオフセットチェーンを開示する。この種のチェーンによれば、隣接するリンクのうち一方のリンクは、リンクプレート間の間隔の狭い方の端部を他方のリンクのリンクプレート間の間隔の広い方の端部に挿入した状態で、他方のリンクに連結されている。 Patent Document 1 discloses an offset chain constituted by one type of link in which the distance between link plates is different between the front end and the rear end of the link. According to this type of chain, one link of adjacent links is inserted with the end with the smaller interval between the link plates inserted into the end with the larger interval between the link plates of the other link. , Connected to the other link.
　しかしながら、オフセットタイプのチェーンでは、リンクの前端と後端とでリンクプレート間の間隔を異ならせる必要がある。このため、各リンクプレートは、リンクプレートの前端と後端との間に、チェーンの長手方向に対して斜めに延びる中間部を有している。このような構成のため、チェーンがその長手方向に引っ張られると、各リンクプレートの中間部に応力が集中し、中間部が変形する虞がある。 However, in the offset type chain, it is necessary to make the interval between the link plates different between the front end and the rear end of the link. For this reason, each link plate has an intermediate portion extending obliquely with respect to the longitudinal direction of the chain between the front end and the rear end of the link plate. Due to such a configuration, when the chain is pulled in the longitudinal direction, stress concentrates in the intermediate part of each link plate, and the intermediate part may be deformed.
特開昭６２－５６６４７号公報JP 62-56647 A
　本発明の目的は、リンクプレートの変形を抑制することのできるチェーンを提供することにある。 An object of the present invention is to provide a chain that can suppress deformation of the link plate.
　上記課題を解決するため、本発明の第一の態様によれば、一対のリンクプレートからなる複数のリンクを直列に連結して構成されたチェーンが提供される。隣接するリンクのうち一方のリンクの前端は、他方のリンクの後端に対して回動自在に連結されている。チェーンは、チェーンの長手方向に引っ張られることで、一方向に走行する。リンクプレートは、第１端部と、第１端部と反対側に位置する第２端部と、第１端部及び第２端部間に設けられる中間部とを有している。第１端部及び第２端部は、チェーンの長手方向にそれぞれ延び、中間部は、チェーンの長手方向に対して交差している。中間部の厚さは、第１端部及び第２端部の厚さよりも大きい。 In order to solve the above-mentioned problem, according to the first aspect of the present invention, there is provided a chain configured by connecting a plurality of links formed of a pair of link plates in series. Among the adjacent links, the front end of one link is rotatably connected to the rear end of the other link. The chain travels in one direction by being pulled in the longitudinal direction of the chain. The link plate has a first end, a second end located on the opposite side of the first end, and an intermediate portion provided between the first end and the second end. The first end and the second end each extend in the longitudinal direction of the chain, and the intermediate portion intersects the longitudinal direction of the chain. The thickness of the intermediate part is larger than the thickness of the first end part and the second end part.
　チェーンの走行時、リンクプレートは、チェーンの長手方向に引っ張られる。この場合、応力が、チェーンの長手方向に対して斜めに延びる中間部に集中し易い。よって、中間部が変形する虞がある。この点、この構成によれば、リンクプレートの中間部の厚さは、リンクプレートの第１端部及び第２端部の厚さよりも大きい。このため、中間部の強度を、第１端部及び第２端部の強度よりも高くすることができる。よって、リンクプレートの中間部に応力が集中しても、中間部及びリンクプレートの変形を抑制することができる。 When the chain is running, the link plate is pulled in the longitudinal direction of the chain. In this case, the stress tends to concentrate on an intermediate portion extending obliquely with respect to the longitudinal direction of the chain. Therefore, there is a possibility that the intermediate portion is deformed. In this regard, according to this configuration, the thickness of the intermediate portion of the link plate is larger than the thickness of the first end portion and the second end portion of the link plate. For this reason, the intensity | strength of an intermediate part can be made higher than the intensity | strength of a 1st edge part and a 2nd edge part. Therefore, even if stress concentrates on the middle part of the link plate, deformation of the middle part and the link plate can be suppressed.
　上記チェーンにおいて、中間部は、第１交差部及び第２交差部を備え、第１交差部は、チェーンの長手方向に対して第１角度で交差し、第２交差部は、チェーンの長手方向に対して第１角度よりも小さい第２角度で交差し、第１交差部の厚さは、第２交差部の厚さよりも大きいことが好ましい。 In the chain, the intermediate portion includes a first intersecting portion and a second intersecting portion, the first intersecting portion intersects at a first angle with respect to the longitudinal direction of the chain, and the second intersecting portion is the longitudinal direction of the chain. However, it is preferable that the first intersection intersects with a second angle smaller than the first angle, and the thickness of the first intersection is greater than the thickness of the second intersection.
　リンクプレートがチェーンの長手方向に引っ張られる場合、長手方向に対する交差角度が大きい部位ほど、応力が集中し易い。この点、この構成によれば、中間部は、第１交差部及び第２交差部を備えている。また、長手方向に対する第１交差部の交差角度は、第２交差部の交差角度よりも大きい。更に、第１交差部の厚さは、第２交差部の厚さよりも大きい。これらにより、リンクプレートがチェーンの長手方向に引っ張られて中間部に応力が集中しても、第１交差部及び第２交差部の変形を抑制することができる。 When the link plate is pulled in the longitudinal direction of the chain, the stress is more likely to be concentrated at the portion where the crossing angle with respect to the longitudinal direction is larger. In this regard, according to this configuration, the intermediate portion includes the first intersection and the second intersection. The intersection angle of the first intersection with respect to the longitudinal direction is larger than the intersection angle of the second intersection. Further, the thickness of the first intersection is greater than the thickness of the second intersection. Accordingly, even when the link plate is pulled in the longitudinal direction of the chain and stress is concentrated on the intermediate portion, deformation of the first intersecting portion and the second intersecting portion can be suppressed.
　上記チェーンにおいて、第１端部に対する中間部の交差角度、及び第２端部に対する中間部の交差角度はいずれも鈍角であることが好ましい。 In the chain, it is preferable that the crossing angle of the intermediate part with respect to the first end part and the crossing angle of the intermediate part with respect to the second end part are both obtuse.
　この構成によれば、第１端部及び中間部の接続部分と第２端部及び中間部の接続部分とが屈曲した構成と比較して、リンクプレートがチェーンの長手方向に引っ張られて中間部が変形することを抑制できる。 According to this configuration, the link plate is pulled in the longitudinal direction of the chain as compared to the configuration in which the connection portion of the first end portion and the intermediate portion and the connection portion of the second end portion and the intermediate portion are bent. Can be prevented from being deformed.
　上記チェーンにおいて、リンクプレートの第１端部には、貫通孔が形成され、第１端部において貫通孔の周縁には、環状の凸部が形成され、凸部は、リンクプレートからその厚さ方向に突出していることが好ましい。 In the chain, a through hole is formed in the first end portion of the link plate, an annular convex portion is formed in the periphery of the through hole in the first end portion, and the convex portion has a thickness from the link plate. It is preferable to protrude in the direction.
　この構成によれば、リンクプレートの第１端部において、孔の周縁に環状の凸部を形成することで、凸部が補強リブとして機能する。これにより、リンクプレートの第１端部での強度を維持することができる。 According to this configuration, the convex portion functions as a reinforcing rib by forming the annular convex portion at the periphery of the hole at the first end portion of the link plate. Thereby, the strength at the first end of the link plate can be maintained.
　上記チェーンにおいて、中間部には、孔が形成されていることが好ましい。 In the above chain, it is preferable that a hole is formed in the middle part.
　この構成によれば、中間部の厚さを第１端部及び第２端部よりも大きくすると共に、孔が中間部に形成されている。このため、リンクプレートがチェーンの移動方向に引っ張られて変形することを抑制しつつ、リンクプレートの軽量化を図ることもできる。 According to this configuration, the thickness of the intermediate portion is made larger than that of the first end portion and the second end portion, and the hole is formed in the intermediate portion. For this reason, it is possible to reduce the weight of the link plate while suppressing the link plate from being pulled and deformed in the moving direction of the chain.
本発明のチェーンを具体化した一実施形態を示す分解斜視図。The disassembled perspective view which shows one Embodiment which actualized the chain of this invention. チェーンの部分破断平面図。The partially broken top view of a chain. チェーンの組み立て方法を示す部分模式図。The partial schematic diagram which shows the assembly method of a chain. チェーンを構成するリンクプレートの斜視図。The perspective view of the link plate which comprises a chain. リンクプレートの平面図。The top view of a link plate.
　以下、本発明のチェーンを具体化した一実施形態を図面に基づいて説明する。尚、チェーンを説明するに際し、チェーンの長手方向Ｘ、幅方向Ｙをそれぞれ、図１に示すように定義する。一対のリンクプレート１２からリンク１３を構成した場合、チェーンの内側、外側をそれぞれ、図２及び図５に示すように定義する。 Hereinafter, an embodiment embodying the chain of the present invention will be described with reference to the drawings. In describing the chain, the longitudinal direction X and the width direction Y of the chain are defined as shown in FIG. When the link 13 is constituted by a pair of link plates 12, the inside and the outside of the chain are defined as shown in FIGS. 2 and 5, respectively.
　図１に示すように、チェーン１１は、一対のリンクプレート１２からなる複数のリンク１３を直列に連結して構成されている。隣接するリンク１３のうち一方のリンク１３の前端が、他方のリンク１３の後端に対して回動可能に連結されている。チェーン１１は、複数のリンク１３、円筒状のブシュ１４、円柱状のピン１５を備えている。ブシュ１４は、一対のリンクプレート１２に対して、両リンクプレート１２間の距離を保つように組み付けられている。ピン１５は、ブシュ１４に挿通されることで、隣接するリンク１３を回動自在に連結する。 As shown in FIG. 1, the chain 11 is configured by connecting a plurality of links 13 including a pair of link plates 12 in series. Of the adjacent links 13, the front end of one link 13 is rotatably connected to the rear end of the other link 13. The chain 11 includes a plurality of links 13, a cylindrical bush 14, and a columnar pin 15. The bush 14 is assembled to the pair of link plates 12 so as to maintain a distance between the link plates 12. The pin 15 is inserted through the bush 14 so as to rotatably connect the adjacent links 13.
　図３に示すように、一方のリンク１３は、リンクプレート１２間の間隔の狭い方の端部を他方のリンク１３のリンクプレート１２間の間隔の広い方の端部に挿入した状態で、他方のリンク１３に隣接している。この状態で、ブシュ１４にピン１５が挿入されることで、複数のリンク１３が、チェーン１１の長手方向Ｘに順次連結されている。チェーン１１は、例えば、物品の搬送や動力の伝達に用いられる。この場合、チェーン１１は、チェーン１１の長手方向Ｘに引っ張られることで、一方向に走行する。チェーン１１の長手方向Ｘは、チェーン１１の移動方向と一致する。 As shown in FIG. 3, one link 13 is inserted in a state where an end portion with a smaller interval between the link plates 12 is inserted into an end portion with a larger interval between the link plates 12 of the other link 13. Adjacent to the link 13. In this state, the pins 15 are inserted into the bushes 14 so that the links 13 are sequentially connected in the longitudinal direction X of the chain 11. The chain 11 is used for conveying articles and transmitting power, for example. In this case, the chain 11 travels in one direction by being pulled in the longitudinal direction X of the chain 11. The longitudinal direction X of the chain 11 coincides with the moving direction of the chain 11.
　図４及び図５に示すように、リンクプレート１２は、鋼材等からなり、鍛造によって略矩形状に形成されている。リンクプレート１２の両端は、他のリンク１３のリンクプレート１２に連結される部分であり、丸みを帯びている。リンクプレート１２は、長手方向Ｘに延びる第１端部２０及び第２端部２１と、第１端部２０及び第２端部２１間に設けられると共に長手方向Ｘに対して交差する中間部２２とを有している。 As shown in FIGS. 4 and 5, the link plate 12 is made of steel or the like and is formed in a substantially rectangular shape by forging. Both ends of the link plate 12 are portions connected to the link plate 12 of the other links 13 and are rounded. The link plate 12 includes a first end portion 20 and a second end portion 21 that extend in the longitudinal direction X, and an intermediate portion 22 that is provided between the first end portion 20 and the second end portion 21 and intersects the longitudinal direction X. And have.
　中間部２２の第１端部２０は、第２端部２１よりも内側に曲げ形成されている。そのため、両リンクプレート１２の第１端部２０間の間隔は、両リンクプレート１２の第２端部２１間の間隔よりも狭い。 The first end 20 of the intermediate part 22 is bent inward from the second end 21. Therefore, the interval between the first ends 20 of both link plates 12 is narrower than the interval between the second ends 21 of both link plates 12.
　つまり、リンクプレート１２は、第１端部２０付近でフラットタイプチェーンの内リンクのリンクプレートとして機能する。また、リンクプレート１２は、第２端部２１付近でフラットタイプチェーンの外リンクのリンクプレートとして機能する。この点で、チェーン１１は、リンク１３の前端と後端とでリンクプレート１２間の間隔が異なるオフセットタイプチェーンともいえる。 That is, the link plate 12 functions as a link plate for the inner link of the flat type chain near the first end portion 20. Moreover, the link plate 12 functions as a link plate for the outer link of the flat type chain in the vicinity of the second end portion 21. In this respect, the chain 11 can be said to be an offset type chain in which the distance between the link plates 12 is different between the front end and the rear end of the link 13.
　図４及び図５に示すように、中間部２２の厚さは、第１端部２０及び第２端部２１の厚さよりも大きい。第１端部２０の厚さは、第２端部２１の厚さと同じである。中間部２２は、第１交差部２２ａ及び第２交差部２２ｂを備えている。第１交差部２２ａは、第１端部２０に対して第１角度で交差する。第２交差部２２ｂは、第２端部２１に対して第１角度よりも小さい第２角度で交差する。第１交差部２２ａの厚さは、第２交差部２２ｂの厚さよりも大きい。 As shown in FIGS. 4 and 5, the thickness of the intermediate portion 22 is larger than the thickness of the first end portion 20 and the second end portion 21. The thickness of the first end 20 is the same as the thickness of the second end 21. The intermediate portion 22 includes a first intersecting portion 22a and a second intersecting portion 22b. The first intersection 22a intersects the first end 20 at a first angle. The second intersecting portion 22b intersects the second end portion 21 at a second angle smaller than the first angle. The thickness of the first intersecting portion 22a is larger than the thickness of the second intersecting portion 22b.
　第１端部２０に対する中間部２２の交差角度、及び第２端部２１に対する中間部２２の交差角はいずれも鈍角である。すなわち、第１交差部２２ａは、第１端部２０及び第２端部２１に対してそれぞれ鈍角に交差する。また、第２交差部２２ｂも、第１端部２０及び第２端部２１に対してそれぞれ鈍角に交差する。 The crossing angle of the intermediate part 22 with respect to the first end part 20 and the crossing angle of the intermediate part 22 with respect to the second end part 21 are both obtuse angles. That is, the first intersecting portion 22 a intersects the first end portion 20 and the second end portion 21 at an obtuse angle. The second intersecting portion 22b also intersects the first end portion 20 and the second end portion 21 at an obtuse angle.
　リンクプレート１２の第１端部２０には、図１に示すブシュ１４が嵌合される円形のブシュ挿入孔２３が形成されている。ブシュ挿入孔２３は、リンクプレート１２をその厚さ方向に貫通する。リンクプレート１２の第１端部２０には、ブシュ挿入孔２３を囲む円環状の環状凸部２４が形成されている。環状凸部２４は、リンクプレート１２の外側面２０ａから外側に突出している。 A circular bush insertion hole 23 into which the bush 14 shown in FIG. 1 is fitted is formed in the first end 20 of the link plate 12. The bush insertion hole 23 penetrates the link plate 12 in the thickness direction. At the first end portion 20 of the link plate 12, an annular annular convex portion 24 surrounding the bush insertion hole 23 is formed. The annular protrusion 24 protrudes outward from the outer surface 20 a of the link plate 12.
　リンクプレート１２の第２端部２１には、図１に示すピン１５が嵌合されるピン挿入孔２５が形成されている。ピン挿入孔２５は、リンクプレート１２をその厚さ方向に貫通する。ピン挿入孔２５の径は、ブシュ挿入孔２３の径よりも小さい。中間部２２には、略矩形状の孔２６が形成されている。リンクプレート１２は、第２端部２１の内側面２１ａに、半円弧状の段差部２１ｂを有している。 A pin insertion hole 25 into which the pin 15 shown in FIG. 1 is fitted is formed in the second end portion 21 of the link plate 12. The pin insertion hole 25 penetrates the link plate 12 in the thickness direction. The diameter of the pin insertion hole 25 is smaller than the diameter of the bush insertion hole 23. A substantially rectangular hole 26 is formed in the intermediate portion 22. The link plate 12 has a step portion 21 b having a semicircular arc shape on the inner surface 21 a of the second end portion 21.
　図１及び図２に示すように、ブシュ１４の両端部１４ａの外径は、中間部１４ｂの外径よりも小さい。この場合、ブシュ１４の両端部１４ａの外径は、ブシュ挿入孔２３に嵌合されるよう設定されている。ブシュ１４の両端部１４ａの外径は、環状凸部２４の内径よりも若干小さい。ブシュ１４の中間部１４ｂの外径は、ブシュ挿入孔２３の内径よりも若干大きい。 As shown in FIG. 1 and FIG. 2, the outer diameter of both end portions 14a of the bush 14 is smaller than the outer diameter of the intermediate portion 14b. In this case, the outer diameter of both end portions 14 a of the bush 14 is set so as to be fitted into the bush insertion hole 23. The outer diameter of both end portions 14 a of the bush 14 is slightly smaller than the inner diameter of the annular convex portion 24. The outer diameter of the intermediate portion 14 b of the bush 14 is slightly larger than the inner diameter of the bush insertion hole 23.
　ピン１５は、同軸上に配置される基端部１５ａ、中間部１５ｃ及び先端部１５ｂを有している。基端部１５ａの外径は、先端部１５ｂの外径よりも大きい。中間部１５ｃの外径は、基端部１５ａの外径よりも小さくかつ先端部１５ｂの外径よりも大きい。中間部１５ｃの外径は、ピン挿入孔２５に挿通可能に設定されている。基端部１５ａの外径は、ピン挿入孔２５の径よりも若干大きい。ブシュ１４の内径は、ピン挿入孔２５の内径よりも若干大きい。その理由は、ピン挿入孔２５は、ピン１５の中間部１５ｃと略同径を有するものの、ブシュ１４の内径は、ブッシュ１４とピン１５との間に潤滑油を保つのに中間部１５ｃよりも若干大きくする必要があるためである。 The pin 15 has a proximal end portion 15a, an intermediate portion 15c, and a distal end portion 15b arranged on the same axis. The outer diameter of the base end portion 15a is larger than the outer diameter of the distal end portion 15b. The outer diameter of the intermediate portion 15c is smaller than the outer diameter of the base end portion 15a and larger than the outer diameter of the distal end portion 15b. The outer diameter of the intermediate portion 15 c is set so that it can be inserted into the pin insertion hole 25. The outer diameter of the base end portion 15 a is slightly larger than the diameter of the pin insertion hole 25. The inner diameter of the bush 14 is slightly larger than the inner diameter of the pin insertion hole 25. The reason is that although the pin insertion hole 25 has substantially the same diameter as the intermediate portion 15 c of the pin 15, the inner diameter of the bush 14 is larger than that of the intermediate portion 15 c to keep lubricating oil between the bush 14 and the pin 15. This is because it needs to be slightly increased.
　次に、チェーン１１の組み立て方法について説明する。 Next, a method for assembling the chain 11 will be described.
　図１及び図２に示すように、チェーン１１を組み立てる場合、第１のリンク１３を構成するため、２つのリンクプレート１２を平行に配置し、両リンクプレート１２のブシュ挿入孔２３にブシュ１４を挿通する。このとき、ブシュ１４の両端部１４ａの先端面は、環状凸部２４の先端面とほぼ面一に配置される。次に、円環状のオイルシール３０を、環状凸部２４とブシュ１４の両端部１４ａとの間に嵌め込む。次に、環状凸部２４の外周面にＯリング３１を嵌めた後、更にＯリング３１を外側から覆うように円環状のシールリング３２を嵌める。 As shown in FIGS. 1 and 2, when the chain 11 is assembled, in order to form the first link 13, the two link plates 12 are arranged in parallel, and the bushes 14 are inserted into the bush insertion holes 23 of both link plates 12. Insert. At this time, the distal end surfaces of the both end portions 14 a of the bush 14 are arranged substantially flush with the distal end surface of the annular convex portion 24. Next, the annular oil seal 30 is fitted between the annular convex portion 24 and both end portions 14 a of the bush 14. Next, an O-ring 31 is fitted on the outer peripheral surface of the annular convex portion 24, and then an annular seal ring 32 is fitted so as to cover the O-ring 31 from the outside.
　続いて、図２及び図３に示すように、第１のリンク１３を構成する一対のリンクプレート１２の第１端部２０を、第２のリンク１３を構成する一対のリンクプレート１２の第２端部２１間に挿入する。このとき、第２のリンク１３を構成するリンクプレート１２の段差部２１ｂに第１のリンク１３のシールリング３２が当接されることで、第１のリンク１３の位置が決められる。 Subsequently, as shown in FIGS. 2 and 3, the first end portion 20 of the pair of link plates 12 constituting the first link 13 is replaced with the second end of the pair of link plates 12 constituting the second link 13. Insert between the end portions 21. At this time, the position of the first link 13 is determined by bringing the seal ring 32 of the first link 13 into contact with the stepped portion 21 b of the link plate 12 constituting the second link 13.
　この状態で、第１のリンク１３のブシュ１４の中心と第２のリンク１３のピン挿入孔２５の中心とが一致する。続いて、第２のリンク１３のピン挿入孔２５と第１のリンク１３のブシュ１４とに、ピン１５を挿入する。このとき、ピン１５は、先端部１５ｂからピン挿入孔２５及びブシュ１４に挿入される。 In this state, the center of the bush 14 of the first link 13 and the center of the pin insertion hole 25 of the second link 13 coincide. Subsequently, the pin 15 is inserted into the pin insertion hole 25 of the second link 13 and the bush 14 of the first link 13. At this time, the pin 15 is inserted into the pin insertion hole 25 and the bush 14 from the distal end portion 15b.
　ピン１５の基端部１５ａは、第２のリンク１３を構成する一方のリンクプレート１２の外側面に当接される。また、ピン１５の先端部１５ｂは、第２のリンク１３を構成する他方のリンクプレート１２の外側面よりも外側へ突出する。その後、リンクプレート１２のピン挿入孔２５からピン１５が抜けないようにするため、ピン１５の先端部１５ｂをかしめる。 The base end portion 15 a of the pin 15 is brought into contact with the outer surface of one link plate 12 constituting the second link 13. Further, the tip portion 15 b of the pin 15 protrudes outward from the outer surface of the other link plate 12 constituting the second link 13. Thereafter, the tip 15b of the pin 15 is caulked in order to prevent the pin 15 from being removed from the pin insertion hole 25 of the link plate 12.
　このとき、ピン１５は、第１のリンク１３に取着されたブシュ１４及び第２のリンク１３のピン挿入孔２５の両方に対して回動自在に保持されている。これにより、第１のリンク１３は、ピン１５を介し第２のリンク１３に対して回動自在に連結される。こうして、複数のリンク１３を直列に連結することで、チェーン１１が完成する。 At this time, the pin 15 is rotatably held with respect to both the bush 14 attached to the first link 13 and the pin insertion hole 25 of the second link 13. As a result, the first link 13 is rotatably connected to the second link 13 via the pin 15. Thus, the chain 11 is completed by connecting the plurality of links 13 in series.
　次に、上記のチェーン１１の作用について説明する。 Next, the operation of the chain 11 will be described.
　チェーン１１は、環状に形成されると共に、図示しないスプロケットに巻き掛けられて使用される。このため、スプロケットが回転すると、チェーン１１は、チェーン１１の長手方向Ｘに引っ張られて、一方向に走行する。例えば、チェーン１１に図示しない複数のバケットを等間隔で取り付ければ、タンカーに積載された石炭や鉄鉱石等の物品の荷揚げに使用することができる。 The chain 11 is formed in an annular shape and used by being wound around a sprocket (not shown). For this reason, when the sprocket rotates, the chain 11 is pulled in the longitudinal direction X of the chain 11 and travels in one direction. For example, if a plurality of buckets (not shown) are attached to the chain 11 at equal intervals, they can be used for unloading articles such as coal and iron ore loaded on a tanker.
　このような用途でオフセットタイプのチェーン１１を使用した場合、チェーン１１には、大きな引っ張り力が加えられる。この場合、リンク１３を構成するリンクプレート１２の中間部２２が長手方向Ｘに対して斜めに延びているため、応力が、リンクプレート１２の中間部２２に集中し易くなっている。 When the offset type chain 11 is used for such purposes, a large tensile force is applied to the chain 11. In this case, since the intermediate portion 22 of the link plate 12 constituting the link 13 extends obliquely with respect to the longitudinal direction X, the stress is easily concentrated on the intermediate portion 22 of the link plate 12.
　この点、本実施形態によれば、リンクプレート１２の中間部２２の厚さは、第１端部２０及び第２端部２１の厚さよりも大きい。このため、リンクプレート１２の中間部２２の強度は、第１端部２０及び第２端部２１の強度に比べて高い。よって、リンクプレート１２の中間部２２に応力が集中しても、中間部２の変形が抑制されて、リンクプレート１２の変形が抑制される。従って、チェーン１１の変形が抑制されるため、チェーン１１の耐久性が向上する。 In this regard, according to the present embodiment, the thickness of the intermediate portion 22 of the link plate 12 is larger than the thickness of the first end portion 20 and the second end portion 21. For this reason, the strength of the intermediate portion 22 of the link plate 12 is higher than the strength of the first end portion 20 and the second end portion 21. Therefore, even if stress concentrates on the intermediate portion 22 of the link plate 12, the deformation of the intermediate portion 2 is suppressed, and the deformation of the link plate 12 is suppressed. Therefore, since the deformation of the chain 11 is suppressed, the durability of the chain 11 is improved.
　リンクプレート１２の厚さを大きくすると、リンクプレート１２の強度は向上する。しかしながら、リンクプレート１２の重量が増加するため、チェーン１１の走行速度は遅くなる。この点、本実施形態によれば、中間部２２の厚さのみを第１端部２０及び第２端部２１よりも大きくすると共に、孔２６が中間部２２に形成されている。これにより、中間部２２の強度を維持しつつリンクプレート１２の軽量化を図ることができる。よって、チェーン１１の軽量化と強度維持とを両立することができる。 When the thickness of the link plate 12 is increased, the strength of the link plate 12 is improved. However, since the weight of the link plate 12 increases, the traveling speed of the chain 11 becomes slow. In this regard, according to the present embodiment, only the thickness of the intermediate portion 22 is made larger than that of the first end portion 20 and the second end portion 21, and the hole 26 is formed in the intermediate portion 22. Thereby, weight reduction of the link plate 12 can be achieved, maintaining the intensity | strength of the intermediate part 22. FIG. Therefore, it is possible to achieve both weight reduction and strength maintenance of the chain 11.
　リンクプレート１２の第１端部２０に形成されるブシュ挿入孔２３は、第２端部２１に形成されるピン挿入孔２５よりも大きい。このため、第１端部２０での剛性が、第２端部２１での剛性よりも低くなる虞がある。この点、本実施形態によれば、第１端部２０のブシュ挿入孔２３の周縁には、環状凸部２４が形成されている。環状凸部２４が補強リブとして機能することで、第１端部２０での剛性の低下が抑制される。 The bush insertion hole 23 formed in the first end 20 of the link plate 12 is larger than the pin insertion hole 25 formed in the second end 21. For this reason, the rigidity at the first end 20 may be lower than the rigidity at the second end 21. In this regard, according to the present embodiment, the annular convex portion 24 is formed on the periphery of the bush insertion hole 23 of the first end portion 20. Since the annular convex portion 24 functions as a reinforcing rib, a decrease in rigidity at the first end portion 20 is suppressed.
　以上、本実施形態によれば、以下の効果を奏することができる。 As described above, according to this embodiment, the following effects can be obtained.
　（１）チェーン１１の走行時、リンクプレート１２は、チェーン１１の周回移動方向である長手方向Ｘに引っ張られる。この場合、応力が、長手方向Ｘに対して斜めに延びるリンクプレート１２の中間部２２に集中し易い。よって、中間部２２が変形する虞がある。この点、本実施形態によれば、リンクプレート１２の中間部２２の厚さは、第１端部２０及び第２端部２１の厚さよりも大きい。このため、リンクプレート１２の中間部２２の強度を、第１端部２０及び第２端部２１の強度よりも高くすることができる。よって、リンクプレート１２の中間部２２に応力が集中しても、中間部２２及びリンクプレート１２の変形を抑制することができる。 (1) When the chain 11 travels, the link plate 12 is pulled in the longitudinal direction X, which is the direction of circular movement of the chain 11. In this case, the stress tends to concentrate on the intermediate portion 22 of the link plate 12 extending obliquely with respect to the longitudinal direction X. Therefore, there exists a possibility that the intermediate part 22 may deform | transform. In this regard, according to the present embodiment, the thickness of the intermediate portion 22 of the link plate 12 is larger than the thickness of the first end portion 20 and the second end portion 21. For this reason, the strength of the intermediate portion 22 of the link plate 12 can be made higher than the strength of the first end portion 20 and the second end portion 21. Therefore, even if stress concentrates on the intermediate portion 22 of the link plate 12, deformation of the intermediate portion 22 and the link plate 12 can be suppressed.
　（２）リンクプレート１２がチェーン１１の長手方向Ｘに引っ張られる場合、長手方向Ｘに対する交差角度が大きい部位ほど、応力が集中し易い。この点、本実施形態によれば、中間部２２は、第１交差部２２ａ及び第２交差部２２ｂを備えている。また、チェーン１１の長手方向Ｘに対する第１交差部２２ａの交差角度は、第２交差部２２ｂの交差角度よりも大きい。更に、第１交差部２２ａの厚さは、第２交差部２２ｂの厚さよりも大きい。これらにより、リンクプレート１２がチェーン１１の長手方向Ｘに引っ張られて中間部２２に応力が集中しても、第１交差部２２ａ及び第２交差部２２ｂの変形を抑制することができる。 (2) When the link plate 12 is pulled in the longitudinal direction X of the chain 11, the stress is more likely to be concentrated at a portion where the crossing angle with respect to the longitudinal direction X is larger. In this regard, according to the present embodiment, the intermediate portion 22 includes the first intersecting portion 22a and the second intersecting portion 22b. Further, the intersection angle of the first intersection 22a with respect to the longitudinal direction X of the chain 11 is larger than the intersection angle of the second intersection 22b. Furthermore, the thickness of the first intersection 22a is larger than the thickness of the second intersection 22b. Accordingly, even when the link plate 12 is pulled in the longitudinal direction X of the chain 11 and stress is concentrated on the intermediate portion 22, deformation of the first intersecting portion 22a and the second intersecting portion 22b can be suppressed.
　（３）第１端部２０に対する中間部２２の交差角度、及び第２端部２１に対する中間部２２の交差角はいずれも鈍角である。このため、第１端部２０及び中間部２２の接続部分と第２端部２１及び中間部２２の接続部分とが屈曲した構成と比較して、リンクプレート１２が長手方向Ｘに引っ張られた場合に中間部２２が変形することを抑制できる。 (3) The intersection angle of the intermediate portion 22 with respect to the first end portion 20 and the intersection angle of the intermediate portion 22 with respect to the second end portion 21 are both obtuse angles. Therefore, when the link plate 12 is pulled in the longitudinal direction X as compared with the configuration in which the connection portion of the first end portion 20 and the intermediate portion 22 and the connection portion of the second end portion 21 and the intermediate portion 22 are bent. It is possible to suppress the intermediate portion 22 from being deformed.
　（４）リンクプレート１２の第１端部２０には、ブシュ挿入孔２３を囲む円環状の環状凸部２４が形成されている。環状凸部２４は、ブシュ挿入孔２３の周縁に設けられると共に、リンクプレート１２の外側面２０ａから外側に突出している。この場合、環状凸部２４が補強リブとして機能するため、リンクプレート１２の第１端部２０の強度を維持することができる。つまり、ブシュ挿入孔２３によるリンクプレート１２の強度低下を、環状凸部２４によって補強することができる。 (4) The first end portion 20 of the link plate 12 is formed with an annular annular convex portion 24 surrounding the bush insertion hole 23. The annular protrusion 24 is provided at the periphery of the bush insertion hole 23 and protrudes outward from the outer surface 20 a of the link plate 12. In this case, since the annular convex portion 24 functions as a reinforcing rib, the strength of the first end portion 20 of the link plate 12 can be maintained. In other words, the strength reduction of the link plate 12 due to the bush insertion hole 23 can be reinforced by the annular protrusion 24.
　（５）中間部２２の厚さのみを第１端部２０及び第２端部２１よりも大きくすると共に、孔２６が中間部２２に形成されている。この構成によれば、リンクプレート１２が長手方向Ｘに引っ張られて変形することを抑制しつつ、リンクプレート１２の軽量化を図ることもできる。 (5) Only the thickness of the intermediate portion 22 is made larger than that of the first end portion 20 and the second end portion 21, and the hole 26 is formed in the intermediate portion 22. According to this configuration, it is possible to reduce the weight of the link plate 12 while suppressing the link plate 12 from being pulled and deformed in the longitudinal direction X.
　上記実施形態は、以下のように変更してもよい。 The above embodiment may be modified as follows.
　・リンクプレート１２から孔２６を省略してもよい。 · The hole 26 may be omitted from the link plate 12.
　・リンクプレート１２に形成される孔２６の位置は、中間部２２以外に、第１端部２０付近や第２端部２１付近であってもよい。また、孔２６の大きさや形状を、適宜変更してもよい。 The position of the hole 26 formed in the link plate 12 may be near the first end 20 or the second end 21 in addition to the intermediate portion 22. Moreover, you may change suitably the magnitude | size and shape of the hole 26. FIG.
　・リンクプレート１２から環状凸部２４を省略してもよい。 · The annular protrusion 24 may be omitted from the link plate 12.
　・リンクプレート１２の中間部２２から、第１交差部２２ａ及び第２交差部２２ｂのうちいずれか一方を省略してもよい。 -Either one of the first intersection 22a and the second intersection 22b may be omitted from the intermediate portion 22 of the link plate 12.
　・リンクプレート１２の中間部２２を、第１端部２０から第２端部２１にかけて湾曲させてもよい。この場合、第１端部２０から第２端部２１に接近するに従い中間部２２の厚さが小さくなるように、中間部２２を形成してもよい。 The intermediate part 22 of the link plate 12 may be curved from the first end part 20 to the second end part 21. In this case, the intermediate portion 22 may be formed so that the thickness of the intermediate portion 22 decreases as the first end portion 20 approaches the second end portion 21.
　・リンクプレート１２の中間部２２を、長手方向Ｘと直交する方向に延びるように形成してもよい。つまり、リンクプレート１２を、中間部２２が第１端部２０と第２端部２１とに対して直交するようクランク状に形成してもよい。 The intermediate part 22 of the link plate 12 may be formed so as to extend in a direction orthogonal to the longitudinal direction X. That is, the link plate 12 may be formed in a crank shape so that the intermediate portion 22 is orthogonal to the first end portion 20 and the second end portion 21.
　・第１端部２０に対する中間部２２の交差角度、及び第２端部２１に対する中間部２２の交差角度をそれぞれ鋭角にしてもよい。 The crossing angle of the intermediate portion 22 with respect to the first end portion 20 and the crossing angle of the intermediate portion 22 with respect to the second end portion 21 may each be an acute angle.

Claims (5)

  1. 一対のリンクプレートからなる複数のリンクを直列に連結して構成されたチェーンであって、隣接するリンクのうち一方のリンクの前端が他方のリンクの後端に対して回動自在に連結され、前記チェーンの長手方向に引っ張られることで一方向に走行するチェーンにおいて、
    　前記リンクプレートは、第１端部と、前記第１端部と反対側に位置する第２端部と、前記第１端部及び第２端部間に設けられる中間部とを有し、
    　前記第１端部及び第２端部は、前記チェーンの長手方向にそれぞれ延び、
    　前記中間部は、前記チェーンの長手方向に対して交差し、
    　前記中間部の厚さは、前記第１端部及び第２端部の厚さよりも大きいことを特徴とするチェーン。     A chain configured by connecting a plurality of links formed of a pair of link plates in series, and the front end of one link among adjacent links is rotatably connected to the rear end of the other link, In a chain that travels in one direction by being pulled in the longitudinal direction of the chain,
    The link plate has a first end, a second end located on the opposite side of the first end, and an intermediate portion provided between the first end and the second end,
    The first end and the second end extend in the longitudinal direction of the chain,
    The intermediate portion intersects the longitudinal direction of the chain,
    The chain characterized in that a thickness of the intermediate portion is larger than thicknesses of the first end portion and the second end portion.
  2. 請求項１記載のチェーンにおいて、
    　前記中間部は、第１交差部及び第２交差部を備え、
    　前記第１交差部は、前記チェーンの長手方向に対して第１角度で交差し、
    　前記第２交差部は、前記チェーンの長手方向に対して前記第１角度よりも小さい第２角度で交差し、
    　前記第１交差部の厚さは、前記第２交差部の厚さよりも大きいことを特徴とするチェーン。     The chain according to claim 1, wherein
    The intermediate portion includes a first intersection and a second intersection,
    The first intersection intersects the longitudinal direction of the chain at a first angle;
    The second intersecting portion intersects the longitudinal direction of the chain at a second angle smaller than the first angle;
    The chain characterized in that the thickness of the first intersection is greater than the thickness of the second intersection.
  3. 請求項１又は２記載のチェーンにおいて、
    　前記第１端部に対する前記中間部の交差角度、及び前記第２端部に対する前記中間部の交差角度はいずれも鈍角であることを特徴とするチェーン。     The chain according to claim 1 or 2,
    The crossing angle of the intermediate part with respect to the first end part and the crossing angle of the intermediate part with respect to the second end part are both obtuse angles.
  4. 請求項１～３のうちいずれか一項に記載のチェーンにおいて、
    　前記リンクプレートの第１端部には、貫通孔が形成され、
    　前記第１端部において前記貫通孔の周縁には、環状の凸部が形成され、
    　前記凸部は、前記リンクプレートからその厚さ方向に突出していることを特徴とするチェーン。     In the chain according to any one of claims 1 to 3,
    A through hole is formed in the first end of the link plate,
    An annular convex portion is formed on the periphery of the through hole in the first end portion,
    The chain, wherein the convex portion protrudes in the thickness direction from the link plate.
  5. 請求項１～４のうちいずれか一項に記載のチェーンにおいて、
    　前記中間部には、孔が形成されていることを特徴とするチェーン。     In the chain according to any one of claims 1 to 4,
    A chain characterized in that a hole is formed in the intermediate portion.
PCT/JP2014/054294 2013-03-27 2014-02-24 Chain WO2014156413A1 (en)

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CN105051412A (en) 2015-11-11
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KR101777492B1 (en) 2017-09-11
JP6359803B2 (en) 2018-07-18
JP2014190441A (en) 2014-10-06

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