JPH10147412A - Covered chain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a covered chain made of steel or stainless steel, fitted with cover pieces at each pitch of the chain very easily, and allowing the cover pieces to be manufactured as common components. SOLUTION: Both end sections 7a, 7a of each pin 7 of this chain 1 are extended and protruded to both sides by the prescribed length. Each cover piece 9 constituting a cover is provided with pin engaging holes 12 at both side cover sections 11. Pin end guide grooves 13 inclined with bottom faces are provided on the inner faces of both side cover sections 11. When both protruded end sections 7a of the pin 7 of the chain 1 are guided into the guide grooves 13 through the tip opening sections 13 a of the guide grooves 13, both protruded end sections 7a of the pin 7 are engaged in the holes 12 via the outward elastic warp deformation and elastic recovery of both side cover sections 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain with a cover used as a conveyor chain or the like, and more particularly to a chain with a cover made of a steel or stainless steel chain.

[0002]

2. Description of the Related Art In a chain conveyor using a roller chain (51) as shown in FIG.
A chain cover must be attached to the chain (51) to prevent the exposed part from being exposed and to make the appearance beautiful, or to prevent the conveyed product from being damaged by direct contact with the chain (51). There is. This chain cover usually comprises a large number of cover pieces, and these cover pieces are arranged in a line in the longitudinal direction of the chain, individually attached to the chain (51), and the chain (51) is flexibly covered. Done.

[0003] Each cover piece constituting the chain cover is a channel-shaped one provided with a top cover portion that covers the outer periphery when the chain is bent, and a pair of side cover portions that cover both side surfaces of the chain. In the longitudinal direction of the roller chain (51), at the ratio of one cover piece to one outer link plate (52), that is, in units of two pitches (one pitch between adjacent pins (53) and (53)). The chain (51) is configured to be locked and attached to the non-corresponding link plate (52) of the chain (51).

However, in the structure in which the cover piece is attached to the chain (51) in units of two pitches as described above, the attachment of the cover piece restricts the bending of the chain (51) at every other pin position in the longitudinal direction. Therefore, bending is allowed only at every other pin position. For this reason, the allowable maximum radius of curvature of the bent portion when the chain (51) is bent is increased, and there is a disadvantage that the sprocket becomes larger. Further, when the chain with a cover is bent, the bent portion has a polygonal shape and is not bent in a smooth curved shape.

Therefore, recently, a cover piece is attached to the chain (51) by locking it to the outer link plate (52) in units of one pitch so that the chain can be bent at all pin positions. A chain cover has been proposed (Japanese Unexamined Patent Publication No. Hei 8-231017). This chain cover has two different types of cover pieces. The first cover piece has, on the inner surface of the side cover portion, a semi-circular locking inwardly projecting portion opened to one side in the chain longitudinal direction, and the semi-circular locking inwardly projecting portion. One half in the longitudinal direction of the outer link plate (52) of the chain (51) is fitted and locked in the part. Further, the second cover piece has a semi-arc-shaped locking inward projection which is opened on the other side in the chain longitudinal direction on the inner surface of the side cover portion, and the chain has The other half in the longitudinal direction of the outer link plate (52) of (51) is fitted and locked. And these first and second two types of cover pieces are
A number of them are alternately arranged along the chain (51), and two cover pieces are provided for one outer link plate.
That is, it is configured to be attached to the chain (51) in units of one pitch.

[0006] Although not a type in which a cover is attached to a chain, in an offset link type chain, an engineering plastic offset link having a flat top portion integrally formed is used as an offset link. There is also provided one in which the plastic offset link is connected by a metal pin. The plastic chain itself has a beautiful appearance that is comparable to a cover attached to the chain, does not damage the conveyed object, and allows bending of the chain at all pin positions.

[0007]

However, first of all,
The above-mentioned chain cover has a drawback that the work of attaching the cover piece is very troublesome and time-consuming. That is,
As with both the first and second cover pieces,
When one half in the longitudinal direction of the outer link plate (52) of the chain (51) is fitted into the semicircular arc-shaped inward projection for locking of the cover piece, it is positioned adjacent to the outer link plate (52). The outer link plate (52) prevents the fitting. Therefore, the cover piece is mounted while repeating the "wisdom ring" mounting operation of bending the chain (51), fitting the cover piece, and then returning the chain (51) straight to each pin position. This makes the installation of the cover piece very cumbersome and time-consuming.

In addition, the chain cover includes a first cover piece fitted and locked on one side in the longitudinal direction of the outer link plate (52) of the chain (51), and an outer link plate (52). And a second cover piece that is fitted and locked to the other side in the longitudinal direction, and is composed of a combination of two types of cover pieces having different structures.
The first and second cover pieces must be separately manufactured and prepared, and there is a disadvantage that the cost is high.

[0009] The above-mentioned plastic chain, while having the above-mentioned advantages, has a drawback that both the tensile breaking strength and the allowable tension are much lower than those of a steel chain. Therefore, the machine length cannot be increased for chain strength reasons.To increase the transport distance, it is necessary to arrange plastic chain conveyors in the longitudinal direction. Required, resulting in high equipment costs.

[0010] In view of the above-mentioned conventional problems, the present invention uses a steel or stainless steel chain having much higher tensile strength than that of plastic, and attaches a chain cover piece to the chain by one pitch. It is intended for a chain with a cover that can be attached in units. In such a chain with a cover, it is very easy to attach the cover piece to the chain, and the installation work can be greatly reduced. It is an object of the present invention to provide a cover-equipped chain having a structure capable of achieving commonality of parts of each cover piece and cost reduction.

[0011]

In order to solve the above-mentioned problem, the present inventor has proposed that the conventional standard chain has a structure in which the locking portion of the cover piece is structurally provided only on the outer link plate (52) as shown in FIG. The structure cannot be secured, that is, the end of the pin (53) connecting the link plates is not protruded to the side so that the cover piece can be attached using this end. Focusing on the fact that the structure has a primary cause of the above problems,
The present invention has been completed.

That is, an object of the present invention is to provide a chain with a cover provided with a steel or stainless steel chain formed by connecting links with pins, and a chain cover for flexibly covering the chain. The chain cover is made up of a number of cover pieces that cover the chain in units of one pitch, and each cover piece covers a side that is an outer periphery when the chain is bent,
A pair of side cover portions that cover both side surfaces of the chain, and both end portions of each pin of the chain are extended sideways by a predetermined length and protruded, respectively, between the inner surface portions of both side cover portions of the cover piece. The spacing distance is set smaller than the length of the pins of the chain, and both side covers are provided with pin fitting holes for fitting the projecting ends of the pins of the chains, respectively. Each has a pin end guide groove extending from the pin fitting hole toward the tip of the side cover portion and opened at the tip of the side cover portion, and both pin end guide grooves are provided at their tip openings. The distance between the bottom portions is set to be equal to or longer than the length of the pins of the chain, and the distance between the bottom portions of the pins of the chain is adjusted toward the pin fitting hole. The bottom is inclined to make it smaller than the length, and both protruding ends of the pins of the chain are introduced into the grooves through the tip openings of the pin end introduction guide grooves on the inner surfaces of both side covers. The side cover portion is elastically deformed outward and elastically returned to the both side cover portions so that both protruding ends of the pins are fitted into the pin fitting holes, and each cover piece is attached to the chain. The problem is solved by a chain with a cover, which is characterized in that:

[0013] In this chain with a cover, in a chain with a cover composed of a large number of cover pieces in which the chain cover covers the chain in units of one pitch, both ends of each pin of the chain extend a predetermined length laterally. Protruding. The distance between the inner surfaces of both side cover portions of the cover piece is set to be smaller than the length of the chain pin, and the two side cover portions are each fitted with a projecting end of the chain pin. A fitting hole is provided, and both protruding ends of the pins of the chain are fitted into the pin fitting holes of both side covers of the cover piece to hold the cover piece on the chain. Therefore, the cover piece alone is firmly held on the chain without unintentionally falling off.

Each of the inner surfaces of both side cover portions of the cover piece is provided with a pin end guide groove extending from the pin fitting hole toward the tip of the side cover portion and opened at the tip of the side cover portion. I have. The distance between the bottom surfaces of the two pin end guide grooves is set to be equal to or longer than the length of the pin of the chain at the front end opening, and the distance between the bottom surfaces of the guide grooves toward the pin fitting hole is reduced. The bottom surface is inclined so that the interval distance between them becomes smaller than the length of the pins of the chain. Therefore,
To attach the cover piece, for example, with the chain extended straight, insert both protruding ends of the pins of the chain into the pin end guide grooves through the tip openings of the pin end guide grooves on the inner surfaces of both side covers of the cover piece. All you have to do is to force the cover piece into the pin side of the chain. By this pushing, the protruding end of the pin of the chain goes to the pin fitting hole while being guided by the pin end introduction guide groove of the cover piece side cover, and in the process, both side covers are elastically bent outward. When the pin protruding end of the chain reaches the pin fitting hole, both side covers resiliently return, and both protruding ends of the chain pin are fitted into the pin fitting holes of the cover piece. The installation of the cover piece is achieved.

Furthermore, in the cover structure in units of one pitch, each cover piece is attached by utilizing the above-mentioned projecting end portions of each pin of the chain, so that the pin fitting of each cover piece is achieved. The part structure is shared, and therefore, the parts of the cover pieces constituting the chain cover can be shared.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. The chain with a cover shown in FIG. 5 is used for a chain conveyor as a transport chain. (1) is a chain, and (2) is a chain cover.

As shown in FIG. 7, the chain (1) is formed by connecting link plates (3) and (6) with pins (7). A pair of inner link plates (3) and (3) are bushes (4)
(4), a roller link in which a roller (5) is rotatably fitted on the outer peripheral side of the bush (4), and a pair of outer link plates (6), (6) with pins (7), (7). A single row roller chain is used to connect the linked pin links alternately by connecting the pins (7) through the bushes (4). The chain (1) is made of a steel or stainless steel chain capable of exhibiting a much higher tensile strength than a plastic chain so that a single conveyor can realize a long conveyor machine length.

In this chain (1), a pin (7)
As shown in FIGS. 7 (b) and (c), both ends (7a)
(7a) is extended from the outer surface of the outer link plate (6) to the side of a predetermined length larger than the pin (53) of the standard roller chain (51) shown in FIG. Note that the outer link plate (6) and the pin (7) are integrated by pressing the pin (7) into a pin insertion hole (6a) provided in the outer link plate (6).

On the other hand, as shown in FIG. 5, the chain cover (2) is composed of a large number of cover pieces (9) which cover the chain (1) in units of one pitch.

Each of the cover pieces (9) is made of an integrated plastic material so as to give a soft feeling of resin to a steel or stainless steel chain having a large allowable tension.
As shown in FIGS. 3 and 4, a top cover (10) that covers the outer periphery of the chain (1) when it is bent, and a pair of side covers (11) (1) that cover both sides of the chain (1).
1) is a channel-shaped member provided with: The cover piece may be made of metal such as aluminum.

In each cover piece (9), the distance between the inner surfaces of both side cover portions (11) and (11) is set smaller than the length of the pin (7) of the chain (1). Right and left circular pin fitting holes (12) (12) for fitting the protruding ends (7a) (7a) of the pins (7) of the chain (1) are respectively formed on the cover portions (11) and (11). It is provided axially. The protruding ends (7a) and (7a) of the pins (7) of the chain (1) are fitted and arranged in the pin fitting holes (12) and (12), so that the cover piece (9) is attached to the chain (1). Is attached.

As described above, the cover piece (9) is brought into contact with the outer peripheral surface of the pin (7) of the chain (1) and the peripheral wall surface in the pin fitting hole (12) of the cover piece side cover (11). The structure of holding the cover piece in contact with the outer peripheral portion of the outer link plate (52) (see FIG. 8) as in the prior art makes the contact portion a chain ( 1) The pin can be arranged close to the center of the pin axis, which is the center of bending, the contact area for holding the cover piece (9) on the chain (1) can be reduced, and the chain to which the cover piece (9) is attached. The increase in the bending resistance of (1) can be suppressed low. Moreover, the cover pieces (9) are assumed to cover the chain (1) in units of one pitch, and the projecting ends (7a) (7a) of the pins (7) of the chain (1) are Since it is configured to be attached to the chain (1) by utilizing, the pin fitting portion structure of each cover piece (9) can be shared and one type of each cover piece (9)... Constituting the chain cover (2) can be used. Can be done.

By the way, as described above, both projecting ends (7a) and (7a) of the chain pin (7) are connected to the cover piece (9).
In such a structure in which the two pins are fitted and held in the pin fitting holes (12), how to perform this mounting poses a problem. That is, the most commonly considered mounting method is that both side cover portions (11) and (11) of the cover piece (9) are elastically bent and deformed outward by hand, and then assembled to the chain (1). , And both side cover parts (11)
This is a method in which (11) is elastically restored, and the protruding ends (7a) (7a) of the pin (7) are fitted into the pin fitting holes (12) (12). However, such a method not only involves the trouble of manually opening the side cover portions (11) and (11), but also the protruding end of the pin (7) in the pin fitting holes (12) and (12). There is also difficulty in fitting (7a) without removing the target, and efficient mounting of the cover piece cannot be realized at all. In particular, in the case of the channel-shaped cover piece (2) described above, the side cover portions (11) (1)
Opening 1) is very difficult.

In order to facilitate this, the covered chain of the present invention is provided with the following additional means. That is, as shown in FIG. 4, the inner surfaces of both side cover portions (11) of the cover piece (9) are respectively provided.
A pin end guide groove (13) is provided extending from the pin fitting hole (12) toward the tip of the side cover part (11) and opening (13a) at the tip of the side cover part (11). I have. And both pin end introduction guide grooves (13) (13)
In the front end openings (13a) and (13a), the distance between the bottom surfaces is set to be equal to or longer than the length of the pin (7) of the chain (1), and the pin fitting holes (12) ( The bottom surface (13a) is inclined so that the distance between the bottom portions is smaller than the length of the pin (7) of the chain (1) toward (12).

By employing such means, the attachment of the cover piece (9) to the chain (1) can be achieved extremely easily and efficiently as follows. That is, FIG.
(B) As shown in (b) and FIGS. 2 (a) and (b), the pin end introduction guide grooves (13) (13) on the inner surface of both side cover portions (11) (11) of the cover piece (9). The tip opening of (13
a) Through (13a), insert both protruding ends (7a) and (7a) of the pin (7) of the chain (1) into the pin end guide groove (13).
(13), and the cover piece (9) is forcibly pushed into the pin (7) side of the chain (1) as it is. By this pushing, as shown in FIGS. 1 (b) and (c) and FIGS. 2 (b) and (c), the projecting ends (7a) and (7a) of the pins (7) of the chain (1) are Pin end guide groove (13) (1
While being guided by 3), it goes to the pin fitting holes (12) and (12), and in the process, the pin (7) is moved to both side cover parts (11).
(11) elastically bends and deforms outward. When the pin protruding ends (7a) (7a) of the chain (1) reach the pin fitting holes (12) (12), both side cover portions (11)
(11) is elastically restored, and both protruding ends (7a) (7a) of the pin (7) of the chain (1) are fitted into the pin fitting holes (12) (12) of the cover piece (9). The attachment of the cover piece (9) is achieved. Thus, the cover piece (9)
It is not necessary to forcibly open both side cover portions (11) and (11) of the chain (1) manually and in consideration of difficulties. The protruding ends (7a) (7a) can be securely and easily fitted into the pin fitting holes (12) (12) without deviating from the target.

In the chain with cover of the present embodiment, as shown in FIGS. 1 (c) and 4 (a) (b), the inner surface of the top cover (10) of the cover piece (9)
Positioning projections (14) are provided between the left and right inner link plates (3) and (3) so as to be slidably projected. When the projections (14) are attached to the chain (1), the projections (14) are provided.
Is projected between the left and right inner link plates (3), (3),
The rattle of the cover piece (9) to the side is restricted. The distance between the inner surfaces of the side cover portions (11) and (11) of the cover piece (9) is slightly larger than the distance between the outer surfaces of the left and right outer link plates (3) of the chain (1). The side cover (11) is set by the positioning action of the protrusion (14).
(11) and the outer link plate (6) are kept out of contact with each other or, if they come into contact with the outer link plate (6), they are held in such a degree that they come in slight contact with each other, and the frictional resistance between the cover piece (9) and the chain (1) is reduced. The bending of 1) is performed with less mechanical resistance.

Further, as shown in FIG. 4B, each cover piece (9) in the present embodiment has one end (11) of the side cover portions (11) and (11) in the chain longitudinal direction.
a) is formed in a convex arc shape centered on the axis of the pin fitting hole (12), and the other end (11b) in the chain longitudinal direction corresponds to the convex arc end (11a). As shown in FIG. 2, the cover pieces (9) adjacent in the front-rear direction are formed into a concave circular arc shape, and these concave and convex circular arc edge portions (11a) are formed.
) (11b) is fitted to the chain (1) by fitting the chain (1) into a straight line as shown in FIG. 5, or when the sprocket rotates as shown in FIG. The chain (1) is configured not to be exposed from between the side cover portions (11) and (11) of the cover piece (9) even if it is bent as described above. Moreover, the outer surface of the top cover portion (10) of the cover piece (9) is formed flat, and in a straight chain state, the outer surfaces of the top cover portions (10) of the adjacent cover pieces (9) are used as load receiving surfaces in the front-rear direction. The top cover (10) has one side in the chain longitudinal direction, that is, the side cover (11) has a protruding arc-shaped edge (11a) side. A thin blindfold extension plate (15) protruding from the inner surface side of the top cover (10) of the adjacent cover piece is integrally connected to the chain (1) as shown in FIG. Even when is bent, the concealing action of the blind extension plate portion (15) prevents the chain (1) from being exposed from between the top cover portions (10) of the adjacent cover pieces. With such a chain exposure prevention mechanism, it is possible to improve the safety, improve the appearance, and prevent the entry of dust and the like.

In the chain with cover (1) adopting the above-described chain exposure preventing mechanism, in this embodiment, FIGS. 2 and 4 show that the cover pieces (9) can be easily attached. As described above, the concave arc-shaped edge portion (11b) of the side cover portion (11) of the cover piece (9) is removed (16) at the tip end side, and the side cover portion (11) of the adjacent cover piece (9) is removed. 11) Convex arc edge (11a
) Side so that it does not go deeply. Moreover,
The leading end opening (13a) of the pin end guide groove (13) is formed wider than the diameter of the pin fitting hole (12).
In addition, the blindfold extension plate (15) is connected to the top cover (10).
Are connected on the side of the convex arc-shaped end portion (11a) of the side cover portion (11) in the longitudinal direction of the chain. Thus, as shown in FIG. 2, the cover piece (9) is attached to the chain (1) after the first cover piece (9) is attached to the chain (1), and then the cover piece (9) is blindfolded. Attach the next cover piece (9) to the next pin (7) located on the side where the extension plate part (15) and the convex arc-shaped end part (11a) are present without attaching the chain (1) to the chain. By repeating the operation of moving the cover piece (9), the attachment of the cover piece (9) to the chain (1) is performed efficiently without difficulty.

Further, in this embodiment, both side cover portions (11) and (11) of the cover piece (9) are in the state where the cover piece (9) is attached to the chain (1).
The tip of the side cover is designed to protrude from the chain (1), and the chain (1) can be supported by slidingly supporting the tip of the side cover (11). Therefore, noise, vibration, and the like caused by directly supporting the chain (1) can be suppressed.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, the chain with a cover according to the present invention is not limited to a conveyor such as a chain conveyor, but may be applied to a lifting chain or various power transmission chains. Further, the chain is not limited to a single-row roller chain, but may be a plurality of rows, and may be various chains such as a bushed chain, a leaf chain, and a silent chain. In short, any structure may be used as long as the links are connected by pins.

[0031]

As described above, the chain with a cover according to the present invention uses a steel or stainless steel chain as the chain, and the steel or stainless steel chain is composed of a large number of cover pieces. Since it is flexibly covered with a cover, it can exhibit a much higher tensile strength than a plastic chain. Therefore, when it is used as a conveyor chain, one drive unit requires a long conveyor machine length. And the chain is covered with the cover and is not exposed in a bare state, so that the chain has a beautiful appearance.

Further, since the chain cover is composed of a large number of cover pieces that cover the chain in units of one pitch, the chain is allowed to bend at all the pin positions, and the chain is bent when the chain is bent. Can reduce the allowable maximum radius of curvature of the bent portion. Accordingly, it is possible to reduce the size of the sprocket for orbiting the chain, and it is possible to form a smooth curved shape when the chain is bent.

Further, in such a chain with a cover, both ends of each pin of the chain are extended sideways by a predetermined length and projected. The distance between the inner surfaces of both side cover portions of the cover piece is set to be smaller than the length of the chain pin, and the two side cover portions are each fitted with a projecting end of the chain pin. A fitting hole is provided, and both protruding ends of the pins of the chain are fitted into the pin fitting holes of both side covers of the cover piece to hold the cover piece on the chain. Therefore, each cover piece can be securely attached to the chain without being unintentionally dropped.

Also, the pins of the chain are fitted into the pin fitting holes of both side covers of the cover piece to hold the cover piece to the chain. Since the piece side cover portion is held by contact with the peripheral wall surface in the pin fitting hole of the piece side cover portion, this contact portion is arranged close to the pin shaft center position, which is the bending center of the chain, and the cover piece is attached to the chain. The contact area for holding the cover piece can be reduced, and the increase in the bending resistance of the chain to which the cover piece is attached can be suppressed lower than that of the conventional outer link plate with the outer peripheral portion fitted and locked.

Further, a pin end guide groove extending from the pin fitting hole toward the tip of the side cover portion and opened at the tip of the side cover portion is provided on each of the inner surfaces of both side cover portions of the cover piece. The distance between the bottom surfaces of the two pin end introduction guide grooves is set to be equal to or longer than the length of the pin of the chain at the distal end opening, and the bottom surface of the bottom surface of the guide groove is directed toward the pin fitting hole. Since the bottom surface is inclined so that the distance between them is smaller than the length of the pins of the chain, the cover piece can be mounted while the chain is straightened, for example, by holding the pins on the inner surface of both side covers of the cover piece. Through the leading end opening of the end introduction guide groove, both projecting ends of the pins of the chain are left in the pin end introduction guide groove, and
It is only necessary to repeat the extremely simple mounting operation of forcibly pushing the cover piece into the chain pin side as it is, so that the chain is bent one by one in the "wisdom ring" type in the conventional mounting work of the cover piece It is not necessary to repeat the process, the attachment of the cover piece to the chain is very easily achieved,
The work of attaching the cover piece can be greatly reduced.

Further, the cover piece includes one chain.
Each of the pins of the chain is extended by a predetermined length and protruded to the side, and each cover piece is attached using the protruding end of the pin. As a result, the structure of the pin fitting portion of each cover piece can be shared, the parts of each cover piece constituting the chain cover can be shared, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 shows an embodiment, and FIG. 1 (a) to FIG. 1 (b)
FIG. 4 is a front sectional view sequentially showing a method of attaching a cover piece to a chain.

FIGS. 2A to 2B are side views respectively.

FIG. 3 shows the cover piece, wherein FIG. 1A is a side view, FIG. 3B is a plan view, FIG. 3C is a bottom view, and FIG.
Is a front view, and FIG.

FIG. 4 shows the same cover piece, and FIG.
FIG. 2A is a cross-sectional view taken along the line II, and FIG.
It is II sectional drawing.

5 (a) is a side view, FIG. 5 (b) is a plan view, and FIG. 5 (c) is a front view, showing how the cover piece is attached to the chain.

FIG. 6 is a side sectional view showing a bent state of the chain cover when the chain is bent.

7A and 7B show a chain used in the present invention, wherein FIG. 7A is a side view, FIG. 7B is a plan view, and FIG. 7C is a front view.

8 (a) is a side view, FIG. 8 (b) is a plan view, and FIG. 8 (c) is a front view showing a conventional standard chain.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Chain 2 ... Chain cover 7 ... Pin 7a ... Protrusion end part 9 ... Cover piece 10 ... Top cover part 11 ... Side cover part 12 ... Pin fitting hole 13 ... Pin end introduction guide groove 13a ... Opening part 13b ... Bottom

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[Procedure amendment]

[Submission date] January 16, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 shows one embodiment of the present invention, in which FIG.
(C) is a front sectional view sequentially showing a method of attaching the cover piece to the chain.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2 is a diagram (a) to FIG. (C) is a side view thereof, respectively.

Claims (1)

[Claims] 1. A cover-equipped chain comprising: a steel or stainless steel chain formed by connecting links with pins; and a chain cover for flexibly covering the chain. The chain cover is composed of a large number of cover pieces that cover the chain in units of one pitch. Each cover piece has a top cover portion that covers the outer periphery when the chain is bent, and a pair of side covers that cover both side surfaces of the chain. A cover portion, and both ends of each pin of the chain are extended laterally by a predetermined length and protruded, and a distance between inner surfaces of both side cover portions of the cover piece is a length of the chain pin. In addition, both side covers are provided with pin fitting holes for fitting the protruding ends of the pins of the chain, respectively. Each of the inner surfaces of the portions is provided with a pin end guide groove extending from the pin fitting hole toward the tip of the side cover portion and opened at the tip of the side cover portion. In the part, the distance between the bottoms is set equal to or longer than the length of the pin of the chain, and the distance between the bottoms toward the pin fitting hole is set to be longer than the length of the pin of the chain. The bottom surface is inclined to make it smaller, and both projecting ends of the pins of the chain are introduced into the groove through the tip openings of the pin end introduction guide grooves on the inner surface of both side cover parts, so that both side cover parts Is elastically deformed outwardly, and both protruding ends of the pins are fitted into the pin fitting holes by elastic return of both side covers, and each cover piece is attached to the chain. Covered chain, characterized by being made as adult.