JP3535130B2 - Conveyor chain - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport chain used for transporting bottles, cans, foods, foods, pharmaceuticals, and other articles in food, drug-related industries, general industries, etc. When links are provided with a top plate for loading objects and are formed into a chain,
The present invention relates to a transport chain that has good bending performance at a connecting portion between links.

[0002]

2. Description of the Related Art Conventionally, a top plate for receiving an object to be conveyed and a link body provided on the lower surface of the top plate form a link (made of plastic), and these links are formed by connecting them with a metal connecting pin. A transport chain is known (Japanese Patent Laid-Open No. 2001-139121).

FIG. 16A shows the back surface of a link that constitutes a conventional conveying chain, and FIG. 16B shows the bearing body. The link 2 includes a top plate 3 and a link body 4 provided on the lower surface of the top plate 3, and the link body 4 has a cylindrical hole 5a in which a bearing body is mounted.
And a pair of leg portions 6 and 7 extending in the chain longitudinal direction on the head portion 5. The leg portions 6 and 7 are provided with pin holes 6a and 7a, respectively. Has been formed. Further, the head 5 is provided with a long hole 5b for a pin.

A relatively short, substantially cylindrical bearing body (made of plastic) having a through hole into which the connecting pin 9 is loosely fitted is mounted in the cylindrical hole 5a of the head portion 5. A bearing portion of the connecting pin 9 is formed by the head portion 5 and the bearing body. Further, the bearing body has teeth ST on one side of one shaft end so that the bearings satisfactorily engage and mesh with the teeth ST of the drive sprocket S (see FIG. 1).
And a flat vertical surface that is continuous with the curved surface.

When linking the links 2 to form a transport chain, the linking pin 9 is arranged so that the head 5 of one link 2 is located between the pair of legs 6, 7 of the other link 2 adjacent to each other. Connect with.

Further, as a conventional conveying chain 1 ', there is also a type that does not have the cylindrical head as described above, as shown in FIG. That is, the link 2'constituting the transport chain 1'is the top plate 3 '.
And a link body 4 ′ provided on the lower surface of the top plate 3 ′. The link body 4'has a pin through hole 5 '.
a cylindrical bearing portion 5'having a, and a pin hole 6'a, which extends in the chain longitudinal direction on the bearing portion 5 ',
It consists of a pair of legs 6 ', 7'having 7'a.

The transport chain 1'includes one link 2 '
The bearing portion 5'is formed by connecting the pair of leg portions 6 ', 7'of the other adjacent link 2'by connecting pins 9'.

[0008]

A conventional transport chain is, for example, when a user changes the length of the chain.
The link is pulled out or a new link is added to connect, but as shown in FIG. 17A, the connecting pin 9 is inserted from the pin hole 6a of the leg portion 6 and hammered in to connect.

However, since a knurl 9a is formed on the rear end side of the connecting pin 9 to prevent the connecting pin 9 from slipping out of the pin hole, the connecting pin 9 is tapped into the pin hole 6a with a hammer as described above. When press-fitting, as shown in FIG. 17 (B), the legs 6 are tilted inward, the interval L1 between the legs is narrowed, and L2 <L1.

Then, the legs 6 and 7 become the head 5 of the bearing.
Since it is compressed and sandwiched or sandwiched, there is a problem that the bending performance of the transport chain is deteriorated and bending failure occurs. This problem is the same in the transport chain 1'as shown in FIG. 18 as well, because when the connecting pin 9'is pressed into the pin hole 6 ', the cylindrical bearing portion 5'is compressed and held. This is a problem that arises.

In view of the above, the present invention solves the problems of the prior art as described above, and the head portion constituting the bearing portion of one link is arranged between the pair of leg portions of the other adjacent link. In the state, in the transport chain in which the links are connected endlessly by the connecting pin, the bearing body can be always mounted in the correct direction on the cylindrical portion of the head.
When connecting the link by inserting the connecting pin into the leg of the link, the narrowing between the legs can be prevented, and the compression of the bearing can be pinched,
Another object of the present invention is to provide a transport chain that can prevent the bending performance of the transport chain from being deteriorated due to the pinching and the bending failure.

[0012]

In order to achieve the above-mentioned object, the present invention according to claim 1 is a head comprising a substantially cylindrical tubular portion having a long hole for a pin through which a connecting pin penetrates. And a pair of legs extending in the longitudinal direction of the chain on the head, a link body is provided on the lower surface of the top plate to form a link, and a pin through hole is formed in the tubular portion. With a substantially cylindrical bearing body mounted rotatably to form a bearing portion, and the head formed on one link is arranged between a pair of leg portions of the other adjacent link. By the connecting pin penetrating the bearing portion, the both ends of which are inserted into the pin holes formed in the pair of leg portions, respectively,
In a transport chain in which links are connected endlessly, a cutout portion into which a tooth of a sprocket is inserted is formed in a cylindrical portion of the head portion, and a convex portion and a concave portion are formed on a bottom surface of the cylindrical portion. Is formed, and at one end of the bearing body,
A curved surface that engages with the tooth surface of the sprocket that has entered from the cutout portion is formed, and a concave portion and a convex portion are formed at the other end, and the concave portion of the bearing body mounted on the cylindrical portion of the head portion. The convex portion formed on the bottom surface of the tubular portion is inserted into the cylindrical portion, and the long hole for the pin of the head forming the bearing portion and the through hole for the pin of the bearing body penetrate to insert the connecting pin, and the inserted The connecting pin has its tip inserted into the pin hole of one leg portion, abuts on the receiving projection formed in the pin hole, and the other end is inserted into the pin hole of the other leg portion. At the same time, the locking projection formed on the connecting pin abuts the edge of the pin hole inside the leg, and the interval between the pair of legs is maintained. It was done. According to a second aspect of the present invention, there is provided a head portion including a substantially cylindrical tubular portion having a long hole for a pin through which a connecting pin penetrates, and a pair of head portions extending in the chain longitudinal direction. A link body including a leg portion is provided on the lower surface of the top plate to form a link, and a substantially cylindrical bearing body having a pin through hole formed in the tubular portion is rotatably attached to the bearing. Part is formed, and the head formed on one link is arranged between a pair of leg parts of the other adjacent link, and penetrates the bearing part, and both ends thereof form a pair of leg parts. In a transport chain in which links are connected endlessly by connecting pins inserted in the formed pin holes, a cutout portion into which a tooth of a sprocket is inserted is formed in a cylindrical portion of the head portion. And a convex portion and a concave portion are formed on the bottom surface of the tubular portion,
A curved surface that engages with the tooth surface of the sprocket that has entered from the cutout portion is formed at one end of the bearing body, and a concave portion and a convex portion are formed at the other end, and the cylinder of the head portion. The convex portion formed on the bottom surface of the cylindrical portion is inserted into the concave portion of the bearing body mounted on the cylindrical portion, and the long hole for the pin of the head and the through hole for the pin of the bearing body which form the bearing portion penetrate through the convex portion. The connecting pin is inserted, the tip of the inserted connecting pin is inserted into the pin hole of one leg, and the connecting pin abuts on the receiving projection formed in the pin hole, and the other end is the other end. Is inserted into the pin hole of the leg portion of the pair of legs, and the engaging groove formed in the connecting pin is fitted and fixed to the engaging protrusion formed on the inner peripheral edge of the pin hole to form a pair of legs. The transport chain has a structure in which the intervals between the parts are maintained.

[0013]

In the carrying chain of the present invention, the cylindrical portion of the head portion is formed with the notch portion into which the teeth of the sprocket are inserted, and the convex portion and the concave portion are formed on the bottom surface of the cylindrical portion. A curved surface that engages with the tooth surface of the sprocket that has entered from the notch is formed at one tip of the body, and a concave portion and a convex portion are formed at the other tip, and the tubular portion of the head portion is formed. The convex portion formed on the bottom surface of the cylindrical portion is inserted into the concave portion of the bearing body mounted on the connecting body, and the elongated hole for the pin of the head and the through hole for the pin of the bearing body that penetrate the bearing portion penetrate to form the connecting pin When the bearing body is mounted in the cylindrical part in the opposite direction to the normal direction, the convex part of the bearing part and the convex part formed on the bottom surface of the cylindrical part come into contact with each other. Since the pin and the through hole for the pin are misaligned, the connecting pin cannot be inserted into the bearing, and as a result, the bearing body is always correct. It is attached to a tree. The tip of the connecting pin inserted into the bearing portion is inserted into the pin hole of one leg portion, and abuts on the receiving projection formed in the pin hole, and the other end has the other leg portion. Is inserted into the pin hole of the connecting portion, and the locking projection formed on the connecting pin abuts the edge of the pin hole inside the leg portion to maintain the distance between the pair of leg portions. Prevents the stenosis between the legs,
The bearing part is prevented from being pinched by compression and pinched, so that the bending performance of the transport chain is lowered and the bending failure is prevented. The connecting pin inserted into the bearing portion has its tip inserted into the pin hole of one leg portion, and abuts on the receiving projection formed in the pin hole, and the other end of the connecting pin of the other leg portion. While being inserted into the pin hole, the engaging groove portion formed in the connecting pin is fitted and fixed to the engaging protrusion formed on the inner peripheral edge of the pin hole,
When the distance between the pair of legs is maintained, narrowing between the legs is prevented, compression pinching and pinching of the bearing part are prevented, and the bending performance of the transport chain is reduced and the bending failure is prevented.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 which is an embodiment of the present invention
Will be described with reference to FIGS. FIG. 1 shows that the carrier chain 11 of the embodiment of the present invention has teeth ST of a sprocket S,
It is explanatory drawing which shows the state which the bearing body 18 mentioned later has meshed well. As shown in FIG. 2, the transport chain 11 is composed of links 12 connected by connecting pins 19 to be described later, and is a universal type that can run while bending along a running line such as a straight line direction, and vertical and horizontal directions. It is a transport chain.

A link 12 which constitutes a transport chain 11.
As shown in FIG. 3 (A) and FIGS. 4 to 6, is composed of a top plate 13 on which a conveyed product is placed, and a link body 14 provided on the lower surface of the top plate 13. Both side surfaces are chamfered 13a (FIG. 4), and the tip side is formed as a curved surface 13b (FIG. 4).
Further, as shown in FIGS. 2 and 6, a curved surface 13c continuous with the lower link body 14 is formed on a part of the lower surface of the side edge of the top plate 13. The chamfer 13a prevents the top plate 13 from edging due to wear of the top plate 13. Since the curved surface 13c of the top plate covers the leg portion of the adjacent link during lateral bending (left and right bending),
The gap between the links when bent is closed. And
The link 12 is integrally molded of synthetic resin.

The link body 14 has a substantially cylindrical head portion 15 having a bearing body cylindrical hole 15a in which the bearing body 18 is mounted.
In addition, the head portion 15 is provided with a pair of leg portions 16 and 17 extending in the chain longitudinal direction. As shown in FIG. 7, concave and convex portions 15c and 15d are formed on the bottom surface of the cylindrical hole 15a (the back surface of the top plate 13) by a concave portion 15c and a convex portion 15d with both sides cut out.

Further, a long hole 15b for a pin through which the connecting pin 19 penetrates is formed in a cylindrical portion around the cylindrical hole 15a of the head portion 15. The head 15 has a substantially cylindrical shape,
As shown in FIG. 6, the extending portions of the legs 16 and 17 are notches 15e, and the teeth ST of the sprocket are inserted into the notches 15e, and the curved surface 18b of the bearing body 18 to be described later is formed. It is designed to engage.

A connecting pin 1 is provided on each of the legs 16 and 17.
Pin holes 16a and 17a into which 9 is inserted are formed. The pin hole 16a of the leg portion 16 is a substantially D-shaped fitting hole, and the pin hole 17a on the side receiving the tip of the connecting pin 19 is
A chamfer 17b is formed so that the tip of the connecting pin 19 can be easily inserted, and in order to prevent the leg from coming out of the leg portion and to prevent narrowing between the leg portions 16 and 17, a ring-shaped receiving projection portion. It is a substantially D-shaped fitting hole having 17c (see FIGS. 6 and 9).

In the cylindrical hole 15a of the head portion 15, the link 12
A relatively short, generally cylindrical bearing body 18 for connecting the two is inserted, and the bearing body 18 is mounted so as to freely rotate about the central axis. In this way, the bearing 18 mounted in the cylindrical hole 15a of the head and the head 1
The bearing portion 20 is composed of 5 and 5.

As shown in FIG. 3B, the bearing body 18 has a circular pin through hole 18 into which a connecting pin 19 is loosely fitted.
a is formed. Further, one end of the bearing body 18 is formed with a curved surface 18b which is lowered on one side shoulder so as to favorably engage with the tooth surface ST of the driving sprocket S, and a vertical surface continuous with the curved surface 18b. 18e is formed. In addition, the concave portion 18 is provided at the other end of the bearing body 18.
Concavo-convex portions 18c and 18d formed by c and the convex portion 18d are formed.

As shown in FIGS. 8A and 8B, the connecting pin 19 has a substantially D-shaped cross section in which a flat surface is formed on a circular pin, and the flat surface prevents the pin from coming off. At the same time, a locking projection 19a for preventing a narrowing between the legs 16 and 17 is formed.

When linking the links 12 to form the transport chain 11, the cylindrical hole 1 of the head 15 of each link 12 is formed.
The bearing body 18 is mounted in the 5a, but in this case, as shown in FIG. 7, the bearing body 18 needs to be mounted in the cylindrical hole 15a of the head portion 15 in the correct orientation.

The correct orientation is the orientation in which the vertical surface 18e of the bearing body 18 and the notch 15e of the head portion 15 face each other, and the tooth ST of the sprocket and the curved surface 18b come into engagement with each other. In this case, the convex portion 18d of the bearing body 18 enters the concave portion 15c of the cylindrical hole 15a, and the pin long hole 15b of the head portion 15 and the pin through hole 18a of the bearing body 18 penetrate.

However, when the bearing body 18 is mounted in the opposite direction, the convex portion 15d of the cylindrical hole 15a is fitted into the convex portion 18d of the bearing body 18.
Abut, the bearing body 18 is slightly lifted, and the head 15
Long hole 15b for pins and through hole 18a for pins of the bearing body 18
The position of shifts vertically and the connecting pin 19 cannot be inserted.

When linking the links 12 having the above structure to form the transport chain 11, first, each link 1
The bearing body 18 is mounted in the cylindrical hole 15a of the second head portion 15, and then the head portion 15 of the one link 12 is positioned between the pair of leg portions 16 and 17 of the other adjacent link 12. The links 12 are connected endlessly by the connecting pin 19 provided between the legs.

In this case, in the first embodiment, as shown in FIG.
As shown in (A), (B), and (C), since the connecting pin 19 is formed with the locking projection 19a, the leg 16 is formed.
When the connecting pin 19 is inserted and driven through the pin hole 16a, the tip of the connecting pin 19 is inserted into the pin hole 17a of the leg portion 17 by the ring-shaped receiving projection 17c so as not to come off. The portion 19a passes through the pin hole 16a and enters the inside of the leg portion 16.

As a result, as shown in FIG. 9, the connecting pin 1
When 9 is mounted between the leg portions 16 and 17, the locking projection 19a on the rear end side of the connecting pin 19 abuts on the edge of the pin hole 16a, and the tip is formed in the pin hole 17a. Since it is inserted into the pin hole 17a so as to come into contact with the projecting portion 17c, the tip of the connecting pin 19 and the receiving projecting portion 17c.
a protrusion 1 for contact with c and the other end of the connecting pin 19
9a and the edge of the pin hole 16a come into contact with each other, so that the legs 16, 1
The space between the legs is maintained to prevent stenosis between the legs,
It is possible to prevent the head portion 15 of the bearing portion 20 from being compressed and pinched, and it is possible to prevent deterioration of the bending performance of the transport chain and bending failure. In addition, the bearing body 18 is attached to the head 15
If it is attached to the tubular portion of the bearing in a direction opposite to the normal orientation, the positions of the pin elongated hole 15b and the pin through hole 18a of the bearing body 18 are vertically displaced, and the connecting pin 19 cannot be inserted into the bearing portion 20, As a result, the bearing body 18 can always be mounted in the correct orientation.

The second embodiment of the present invention will be described with reference to FIGS. The transport chain of the second embodiment differs from the transport chain of the first embodiment only in the shape of the connecting pins and the pin holes of the legs, and the main structure of the transport chain is the same. Hereinafter, the same members as those in the first embodiment will be described by appropriately assigning the same reference numerals.

10A and 10B, the connecting pin 29 is shown.
Is shown in a side view and a front view, and the connecting pin 29 has a circular cross section, and has a ring-shaped locking projection 29a on the rear end side.
Are formed.

FIG. 11 shows an explanatory view when the connecting pin 29 is mounted between the leg portions 26 and 27, and here, it is shown as a front view of the link in which the bearing body 18 is omitted. . The leg portion 26 is provided with a circular pin hole 26a into which the connecting pin 29 is inserted, and the leg portion 27 is provided with a circular pin hole 27a.
In order to prevent the tip of the connecting pin 29 from coming out of the leg portion and to prevent the narrowing between the leg portions 26 and 27,
It is a circular fitting hole having a ring-shaped receiving projection 27c.

When linking the links 22 to form a transport chain, as in the first embodiment, first, the bearing body 18 is mounted in the cylindrical hole 15a of the head 15 of each link 22, and then the bearing body 18 is mounted. , The head 15 of one of the links 22 is positioned between the pair of legs 26, 27 of the other adjacent link 22, and the links 22 are connected by the connecting pin 29 provided between the legs. Connect endlessly.

In this case, as shown in FIGS.
Since the connecting pin 29 is formed with the locking projection 29a, when the connecting pin 29 is inserted and driven through the pin hole 26a of the leg portion 26, the tip thereof is ring-shaped in the pin hole 27a of the leg portion 27. Is inserted so as to abut on the receiving projection 27c, and the locking projection 29a passes through the pin hole 26a and enters the inside of the leg 26 to abut and lock the edge of the pin hole 26a. .

As a result, the connecting pin 29 causes the legs 26, 27 to
When provided over the space, the locking projection 29a on the rear end side of the connecting pin 29 is brought into contact with and locked by the edge of the pin hole 26a, and the tip end is in the receiving projection 27c of the pin hole 27a. Since it is inserted and fitted into the pin hole 27a so as to abut, the tip of the connecting pin 29 and the receiving projection 27c abut, and the locking projection 29a at the other end of the connecting pin and the edge of the pin hole 27a. The contact between the legs keeps the distance between the legs, prevents narrowing between the legs, and prevents the head portion 15 of the bearing portion from being compressed and pinched, thereby lowering the bending performance of the transport chain. Bending failure can be prevented.

The third embodiment of the present invention will be described with reference to FIGS. The transport chain of the third embodiment is different from the transport chain of the first embodiment only in the shape of the connecting pin and the shape of the pin hole of the leg portion, and the main configuration of the transport chain does not change. Hereinafter, the same members as those in the first embodiment will be described by appropriately assigning the same reference numerals.

A connecting pin 39 is shown in FIG. 12. The connecting pin 39 has a circular cross section, and has a ring-shaped locking groove 39a formed on the rear end side.

FIG. 13 is an explanatory view in the case where the connecting pin 39 is provided between the leg portions 36 and 37, and is shown here as a front view of the link in which the bearing body 18 is omitted. . The leg portion 36 is provided with a circular pin hole 36a into which the connecting pin 39 is inserted, and a ring-shaped locking protrusion 36b is formed on the inner peripheral edge of the pin hole 36a. In addition, the leg portion 37 is provided with a circular pin hole 37a. The pin hole 37a prevents the tip of the connecting pin 39 from coming out of the leg portion, and the leg portions 36, 37.
In order to prevent the narrowing of the space, a ring-shaped receiving projection 3
It is a circular fitting hole having 7c.

When linking the links 32 to form a carrying chain, first, as in the first embodiment, the bearing body 18 is mounted in the cylindrical hole 15a of the head 15 of each link 32, and then the bearing body 18 is mounted. , The head 15 of one of the links 32 is positioned between the pair of legs 36, 37 of the other adjacent link 32, and the connecting pin 39 is attached between the legs to connect the links 32 endlessly. Connect in a shape.

In this case, as shown in FIG. 12 and FIG.
Since the connecting pin 39 has a recessed groove 39a for locking, when the connecting pin 39 is inserted through the pin hole 36a of the leg portion 36 and driven in, the tip end thereof is ring-shaped in the pin hole 37a of the leg portion 37. Of the pin hole 36a, and the locking projection 36b of the pin hole 36a fits into the locking groove 39a of the connecting pin 39.

As a result, the connecting pin 39 is connected to the legs 36, 37.
When provided over the space, the locking concave groove 39a on the rear end side of the connecting pin 39 is fitted and fixed to the ring-shaped locking projection 36b of the pin hole 36a, and the tip end thereof is the pin hole 37a.
The pin hole 37a so as to come into contact with the receiving projection 37c of
The projection 3 for receiving at the tip of the connecting pin 39
7c, and the concave groove portion 39a and the protruding portion 36b at the rear end.
By fitting and fixing the above, the space between the leg portions is maintained, the narrowing between the leg portions is prevented, and the compression and pinching of the head portion 15 of the bearing portion can be prevented, and the bending performance of the transport chain can be improved. It is possible to prevent deterioration and poor bending.

As described above, as the first to third embodiments, the link constituting the transport chain has the top plate and the link body having substantially the same shape. The top plate is shown in FIGS. 14 and 15. As described above, the top plates 13 ′ and 13 ″ that are larger than the width of the link body may be used, and the shape thereof is a crescent-shaped top plate (not shown).
It doesn't matter.

[0041]

According to the first aspect of the present invention, in the carrying chain, the cylindrical portion of the head portion is formed with the notch portion into which the teeth of the sprocket are inserted, and the bottom surface of the cylindrical portion. A convex portion and a concave portion are formed, and a curved surface that engages with a tooth surface of a sprocket that has entered from the cutout portion is formed at one end of the bearing body, and a concave portion and a convex portion are formed at the other end. The convex portion formed on the bottom surface of the tubular portion enters the concave portion of the bearing body that is formed and is mounted on the tubular portion of the head portion, and the long hole for the pin of the head portion that constitutes the bearing portion and the pin of the bearing body Since the connecting pin is inserted through the through hole for use, when the chain is assembled or when the chain is cut and attached, if the bearing body is installed in the cylindrical part in the opposite direction to the normal direction, The long hole for the pin and the long hole for the pin Will not be able to insert the connecting pin to the bearing part is deviated and a through hole, as a result, it is possible to always mount the bearing body in the correct orientation.

Further, the connecting pin inserted into the bearing portion has its tip inserted into the pin hole of one leg portion, and abuts on the receiving projection formed in the pin hole, and the other end thereof. While being fitted into the pin hole of the other leg portion, the locking projection formed on the connecting pin abuts the edge of the pin hole inside the leg portion, so that the distance between the pair of leg portions is increased. Since it is held, it is possible to prevent the leg portions from being narrowed, to prevent the bearing portion from being compressed and pinched, and to prevent the bending performance of the transport chain from being deteriorated and the bending failure to be prevented.

According to the present invention of claim 2, as in the case of the present invention of claim 1, when the bearing body is mounted in the cylindrical portion in a direction opposite to the normal direction, the bearing body has convex portions. Since the convex portion formed on the bottom surface of the tubular portion contacts, it becomes impossible to insert the connecting pin into the bearing portion, and as a result, the bearing body can always be mounted in the correct orientation. The tip of the connecting pin inserted into the bearing portion is inserted into the pin hole of one leg portion, and abuts on the receiving projection formed in the pin hole, and the other end has the other leg portion. Is inserted into the pin hole of the connecting portion, and the engaging groove portion formed in the connecting pin is fitted and fixed to the engaging protrusion formed on the inner peripheral edge of the pin hole, so that a pair of leg portions Since the space is maintained, the constriction between the leg portions is prevented, compression of the bearing portion is prevented, and the bearing portion is prevented from being pinched, so that the bending performance of the transport chain and the bending failure can be prevented.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a state in which a carrying chain is properly meshed with teeth of a sprocket in a first embodiment of the present invention.

FIG. 2 is an explanatory diagram when the transport chain bends and travels as above.

FIG. 3 shows an exploded view of the transport chain, as shown in FIG.
Is a perspective view of a link, (B) is a perspective view of a bearing body, and (C) is a perspective view of a connecting pin.

FIG. 4 is a plan view of the link surface side, same as above.

FIG. 5 is a side view of the same as above.

FIG. 6 is a plan view of the back side of the link.

FIG. 7 is an explanatory diagram when the bearing body is mounted in the same direction as above.

FIG. 8 shows a connecting pin, (A) is a plan view,
(B) is a front view and (C) is a side view.

FIG. 9 is an explanatory view showing a mounting state of the connecting pin of the above.

FIG. 10 shows a connecting pin in Embodiment 2 of the present invention,
(A) is a plan view and (B) is a front view.

FIG. 11 is an explanatory view showing a mounted state of the connecting pin.

FIG. 12 shows a connecting pin in Embodiment 3 of the present invention,
(A) is a plan view and (B) is a front view.

FIG. 13 is an explanatory diagram showing a mounting state of the connecting pin of the above.

FIG. 14 is a plan view of a link which is a modified example of each embodiment of the present invention.

FIG. 15 is a plan view of a link which is a modified example of each embodiment of the present invention.

FIG. 16 shows a link and a bearing body in a conventional transport chain, (A) is a plan view of the back side of the link, (B)
[Fig. 3] is a perspective view of a bearing body.

FIG. 17 is the same as above, showing a mounting state of the connecting pin, FIG. 17A is an explanatory diagram when the connecting pin is inserted, and FIG.

FIG. 18 is a plan view of the back side of another conventional transport chain.

[Explanation of symbols]

11 Transport chain 12, 22, 32 links 13 Top plate 13a Chamfer 13b Curved surface 13c curved surface 14 link body 15 head 15a tube hole 15b Pin long hole 15c Recess 15d convex portion 15e notch portion 16 legs 16a pin hole 17 Leg 17a Pin hole 17b Chamfer 17c Receiving projection 18 Bearing body 18a Pin through hole 18b Curved surface 18c Recess 18d convex portion 18e vertical surface 19 Connecting pin 19a Locking protrusion 20 Bearing 26 legs 26a pin hole 27 leg 27a pin hole 27c Receiving projection 29 connecting pin 29a locking protrusion 36 leg 36a pin hole 36b Locking protrusion 37 Leg 37a Pin hole 37c Receiving projection 39 connection pin 39a locking groove S Sprocket ST Teeth

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 2001-139121 (JP, A) JP 63-258306 (JP, A) JP 45-21059 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B65G 17/08 B65G 17/38

Claims (2)

(57) [Claims] 1. A head portion comprising a substantially cylindrical tubular portion formed with a long hole for a pin through which a connecting pin passes, and a pair of leg portions extending in the chain longitudinal direction on the head portion. A link main body is provided on the lower surface of the top plate to form a link, and a substantially cylindrical bearing body having a pin through hole formed in the tubular portion is rotatably mounted to form a bearing portion. , A state in which a head formed on one link is disposed between a pair of leg portions of the other adjacent link, the bearing portion is penetrated, and both ends thereof are formed on the pair of leg portions, respectively. In a transport chain in which links are connected endlessly by a connecting pin inserted in a pin hole, a notch portion into which a tooth of a sprocket is inserted is formed in a tubular portion of the head portion, and A convex portion and a concave portion are formed on the bottom surface of the cylindrical portion, A curved surface that engages with the tooth surface of the sprocket that has entered from the notch is formed at the other end, and a concave portion and a convex portion are formed at the other end, and the curved surface is attached to the cylindrical portion of the head. The convex portion formed on the bottom surface of the cylindrical portion enters the concave portion of the bearing body, and the connecting pin is inserted through the long hole for the pin of the head forming the bearing portion and the through hole for the pin of the bearing body. The tip of the inserted connecting pin is inserted into the pin hole of one leg portion, and abuts on the receiving projection formed in the pin hole, and the other end of the connecting pin is attached to the other leg portion. While being fitted into the pin hole, the locking projection formed on the connecting pin abuts the edge of the pin hole inside the leg portion to maintain the distance between the pair of leg portions. A transport chain characterized by. 2. A head portion formed of a substantially cylindrical tubular portion formed with a long hole for a pin through which a connecting pin penetrates, and a pair of leg portions extending in the chain longitudinal direction on the head portion. A link main body is provided on the lower surface of the top plate to form a link, and a substantially cylindrical bearing body having a pin through hole formed in the tubular portion is rotatably mounted to form a bearing portion. , A state in which a head formed on one link is disposed between a pair of leg portions of the other adjacent link, the bearing portion is penetrated, and both ends thereof are formed on the pair of leg portions, respectively. In a transport chain in which links are connected endlessly by a connecting pin inserted in a pin hole, a notch portion into which a tooth of a sprocket is inserted is formed in a tubular portion of the head portion, and A convex portion and a concave portion are formed on the bottom surface of the cylindrical portion, A curved surface that engages with the tooth surface of the sprocket that has entered from the notch is formed at the other end, and a concave portion and a convex portion are formed at the other end, and the curved surface is attached to the cylindrical portion of the head. The convex portion formed on the bottom surface of the cylindrical portion enters the concave portion of the bearing body, and the connecting pin is inserted through the long hole for the pin of the head forming the bearing portion and the through hole for the pin of the bearing body. The tip of the inserted connecting pin is inserted into the pin hole of one leg portion, and abuts on the receiving projection formed in the pin hole, and the other end of the connecting pin is attached to the other leg portion. While being inserted into the pin hole, the engaging groove formed in the connecting pin is fitted and fixed in the engaging protrusion formed on the inner peripheral edge of the pin hole, and the gap between the pair of legs is increased. A carrying chain characterized by being held.