TWI570337B - Conveyor chain - Google Patents

Description

Conveyor chain

The present invention relates to a conveyor chain formed by sealing lubricating oil into a peripheral region of a plurality of rollers disposed between the sleeve and the roller at intervals, in particular, for loading coils and billets in the field of iron making. The conveyor chain that is equal to the weight and conveyed.

Conventionally, as a conveyor chain for transporting weights such as coils and billets in the field of steel making, the lubricating oil is sealed in a peripheral region of a plurality of rollers disposed between the sleeve and the roller at intervals. The conveyor chain is widely used.

The prior conveyor chain comprises: an inner connecting rod plate which is arranged with a pair of left and right sides; a sleeve which is press-fitted into a sleeve hole of the inner connecting rod plate; and a roller which is rotatably and externally embedded a peripheral side of the sleeve; a connecting pin inserted through the inner peripheral side of the sleeve; and a left and right outer link plate press-fitted to the both ends of the connecting pin to extend the inner link plate to the chain length The directions are connected to each other; a plurality of rollers are disposed at intervals between the outer circumferential surface of the sleeve and the inner circumferential surface of the roller; and a pair of right and left annular thrust bearing members are press-fitted into the outer circumference of the sleeve The surface is disposed between the inner side surface of the inner link plate and the end surface of the roller, and the lubricating oil is sealed in the peripheral region of the roller (see, for example, Patent Document 1).

Further, as shown in Fig. 9, the transport chain 500 of the other conventional example is provided with an annular thrust bearing member 570 at both end portions of the roller 530, and an outer peripheral surface of the inner peripheral surface 530a of the roller 530 and the annular thrust bearing member 570. 570a formed separately The groove having a semi-circular cross section, the groove of the roller 530 and the groove of the annular thrust bearing member 570 are aligned up and down to form a gap having a circular cross section, and a seal having a circular cross section is disposed substantially without a gap in the gap. Circle 580 (for example, refer to Patent Document 2).

[Previous Technical Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent No. 3719963 (Application Patent Range, Fig. 1)

[Patent Document 2] Japanese Patent No. 3563354 (Application Patent Range, Fig. 4)

However, the conventional conveyor chain described in Patent Document 1 of the former has a problem in that there is a gap between the sleeve and the annular thrust bearing member that is slidably fitted to the sleeve, so that it is sealed around the roller. Lubricating oil in the area leaks from the gap to the outside or dust or the like invades from the outside.

Further, the transport chain 500 described in the latter Patent Document 2 has a problem in that since the inner diameter of the seal ring 580 is formed to be smaller than the outer diameter of the annular thrust bearing member 570, it is necessary to elastically expand the seal ring 580 side. One side is inserted into the annular thrust bearing member 570, and the mounting load of the seal ring 580 is increased.

Further, when the sealing ring 580 made of synthetic resin is reduced in diameter due to an increase in temperature, there is a problem in that a gap is formed between the inner circumferential surface 530a of the roller 530 and the outer circumferential surface 580a of the sealing ring 580, so that lubricating oil is present. Since The gap leaks to the outside.

Further, there is a problem in that the gap between the roller 530 and the annular thrust bearing member 570 is formed on the lower side in the vertical direction, so that it is in sliding contact with the groove of the roller 530 provided with the seal ring 580 substantially without a gap, and the seal ring When the inner circumferential surface 530a of the pair of rollers 530 is worn, the lubricating oil leaks from the roller 530 and the annular thrust bearing member 570 to the outside without any hindrance, so that the oil is broken at an early stage.

The present invention is directed to solving the problems of the prior art described above, that is, an object of the present invention is to provide a conveyor chain in which an annular sealing member suppresses leakage of oil to the outside of a lubricating oil in a peripheral region of the roller and prevents it from being externally The foreign matter is invaded into the peripheral region of the roller, and lubricating oil is secured for a long period of time, and the annular seal member is easily attached to the annular thrust bearing member.

The invention of claim 1 solves the above problems by the following technique, which is a conveyor chain comprising: an inner link plate which is arranged in a pair of left and right sides; a sleeve which is press-fitted into the same a sleeve hole of the inner connecting rod; a roller rotatably slidably fitted to the outer peripheral side of the sleeve; a connecting pin inserted through the inner peripheral side of the sleeve; and a left and right outer connecting rod plate, respectively Pressing and fitting the two ends of the connecting pin to connect the inner link plates to each other in the longitudinal direction of the chain; a plurality of rollers are disposed at intervals between the outer circumferential surface of the sleeve and the inner circumferential surface of the roller And a pair of right and left annular thrust bearing members, which are press-fitted into the outer peripheral surface of the sleeve and spaced between the inner side surface of the inner link plate and the end surface of the roller at intervals; and the above-mentioned conveyor chain is lubricated Oil seal In the peripheral region of the roller, an annular sealing member that is in close contact with the outer circumferential surface of the annular thrust bearing member and seals the lubricating oil is provided on the inner circumferential surface of the roller and the outer circumference of the annular thrust bearing member. An annular seal cap that is placed adjacent to the outer side in the chain width direction of the annular seal member is press-fitted into the inner circumferential surface of the roller.

Further, the annular thrust bearing member is press-fitted into the outer circumferential surface of the sleeve at a nip position allowing the fine movement of the roller in the chain width direction, and the roller includes the roller being sandwiched in the chain width direction. The inner peripheral side flange portion that is slightly moved and that is capable of positioning the annular sealing member in a frustoscopic width direction.

The invention of claim 2 solves the above problems by the following technique. In addition to the configuration of the invention of claim 1, the outer side wall surface of the inner peripheral side flange portion of the roller and the inner side wall surface of the annular seal cover are formed. An annular groove forming portion that engages with the outer peripheral side portion of the annular seal member.

The invention of claim 3 solves the above problems by the following technique, wherein the annular sealing member is smaller than the bottom diameter of the annular groove forming portion and larger than the inside of the roller, in addition to the configuration of the invention of claim 2 The outer diameter of the diameter is formed.

The invention of claim 4 solves the above problems by the following technique. In addition to the constitution of the invention of any one of claims 1 to 3, the outer side of the annular seal cover is formed by the inner peripheral edge of the roller. The part is pressed and the claws are engaged.

The invention of claim 5 solves the above problems by the following technique, except for the constitution of the invention of any one of claims 1 to 4, the above ring The sealing member is disposed opposite to the end surface of the roller with a gap therebetween.

The invention of claim 6 solves the above problems by the following technique. The annular sealing member is a uniform and non-cracked annular body in all weeks except for the configuration of any one of claims 1 to 5. Formed.

The invention of claim 7 solves the above problems by the following technique, except that the casing of any one of claims 1 to 6 includes the lubricating oil in the connecting pin toward the periphery of the roller. The oil supply hole supplied in the area.

The conveying chain of the present invention comprises: an inner connecting rod plate which is arranged with a pair of left and right sides; a sleeve which is press-fitted into a sleeve hole of the inner connecting rod plate; and a roller which is slidably fitted to the roller The outer side of the sleeve; the connecting pin is inserted into the inner peripheral side of the sleeve; the left and right outer connecting rod plates are respectively press-fitted into the two ends of the connecting pin to extend the inner connecting rod to the chain length The directions are connected to each other; a plurality of rollers are disposed between the outer circumferential surface of the sleeve and the inner circumferential surface of the roller at intervals; and a pair of left and right annular thrust bearing members are press-fitted into the outer circumference of the sleeve The surface is spaced between the inner side surface of the inner connecting rod plate and the end surface of the roller; and by enclosing the lubricating oil in the peripheral region of the roller, the peripheral portion of the roller is filled with the lubricating oil. Therefore, the roller can be smoothly rotated by a plurality of rollers, and a unique effect can be exerted in the present invention as follows.

In other words, according to the transport chain of the invention of claim 1, the annular seal member that is in close contact with the outer peripheral surface of the annular thrust bearing member and seals the lubricating oil is disposed between the inner circumferential surface of the roller and the outer circumferential surface of the annular thrust bearing member. With this, The inner diameter of the annular sealing member is formed to be substantially the same size with respect to the outer diameter of the annular thrust bearing member. Therefore, it is possible to avoid the elastic expansion of the annular sealing member when the annular sealing member is embedded in the annular thrust bearing member. Work hard to easily install the annular seal member.

Moreover, the annular seal cover which is adjacent to the outer side in the chain width direction of the annular seal member is press-fitted into the inner circumferential surface of the roller, whereby the inner circumferential surface of the roller and the outer circumferential surface of the annular seal cover are interposed therebetween. When the annular seal member is reduced in diameter due to an increase in temperature and a gap is formed between the inner circumferential surface of the roller and the outer circumferential surface of the annular seal member, the annular seal member is abutted and looped. The sealing cover can also seal the lubricating oil that is to be leaked from the gap to the outside.

Further, an annular sealing member that is in close contact with the outer circumferential surface of the annular thrust bearing member and seals the lubricating oil is provided between the inner circumferential surface of the roller and the outer circumferential surface of the annular thrust bearing member, and the chain width of the annular sealing member. The annular seal cap that is adjacent to the outer side of the direction is press-fitted into the inner circumferential surface of the roller, whereby the annular seal member does not wear the outer circumferential surface of the annular thrust bearing member, and the annular seal member and the ring The sealing cover reliably closes between the inner circumferential surface of the roller and the outer circumferential surface of the annular thrust bearing member, thereby suppressing leakage of oil to the outside of the lubricating oil in the peripheral region of the roller, and preventing from the outside The foreign matter in the peripheral region of the roller is invaded, and even when the lubricating oil is to be oozing out to the outside, lubricating oil remains from the inner peripheral surface of the roller to the inner peripheral surface of the annular sealing member on the lower side in the vertical direction. Therefore, it is also possible to maintain lubricating oil for a long time.

Moreover, the annular thrust bearing member is adapted to allow the roller width direction of the roller The pinching position of the micro-motion is press-fitted into the outer peripheral surface of the sleeve, and the roller includes clamping the roller so that the roller width direction is frettable and the annular sealing member is vertically movable in the chain width direction. The circumferential side flange portion, whereby the pair of right and left inner circumferential side flange portions and the pair of left and right annular thrust bearing members allow the roller to be slightly moved in the chain width direction, so that the lubricating oil sealed in the peripheral region of the roller is not The distribution is uneven throughout, so that the rolling of the sleeve and the roller and the rolling of the roller and the roller can be smoothly achieved.

Further, in the transport chain according to the invention of claim 2, in addition to the effect of the transport chain of the invention of claim 1, the outer side wall surface of the inner peripheral side flange portion of the roller and the inner side wall surface of the annular seal cover are formed and formed. The annular groove forming portion that is engaged with the outer circumferential side portion of the annular sealing member, whereby the outer circumferential surface portion of the annular sealing member and the groove wall surface formed on the annular groove forming portion form a concave-convex engaging structure, and a so-called labyrinth is formed. The structure can prevent the external leakage of the lubricating oil which is easily generated between the annular sealing member and the roller, and the annular sealing member is relatively freely displaced in the radial direction with respect to the roller and the annular sealing cover in the annular groove forming portion. Therefore, when the conveyance drive is performed, even if the roller is eccentrically rotated in the radial direction with respect to the sleeve, the annular seal member does not contact the inner circumferential surface of the roller and is subjected to the load to avoid the annular thrust bearing. The wear of the outer peripheral surface of the member can suppress the external leakage of the lubricating oil which is easily generated between the annular thrust bearing member and the annular sealing member.

According to the transport chain of the invention of claim 3, in addition to the effect exerted by the transport chain of the invention of claim 2, the annular seal member is formed with an outer diameter smaller than the bottom diameter of the annular groove forming portion and larger than the inner diameter of the roller. Therefore, the annular sealing member is always engaged in the annular groove forming portion, and therefore, the conveying drive When the roller is eccentrically rotated in the radial direction with respect to the sleeve or the roller or the roller is rotated in a skewed state with respect to the sleeve, the annular sealing member can be prevented from the annular groove. The formation part is inadvertently detached.

According to the transport chain of the invention of claim 4, in addition to the effect of the transport chain of the invention of any one of claims 1 to 3, the outer side of the annular seal cover is pressed by the inner peripheral edge of the roller. Since the locking claw is engaged with the locking claw, even if the annular sealing cover is relatively moved in the chain width direction with respect to the roller, since the locking claw restricts the movement of the annular sealing cover, it can be reliably prevented. The annular sealing cover is detached.

According to the transport chain of the invention of claim 5, in addition to the effect of the transport chain of the invention of any one of claims 1 to 4, the annular seal member and the end surface of the roller are arranged to face each other with a gap therebetween, whereby The lubricating oil stored in the oil storage region between the end surface of the roller and the annular sealing member is supplied to the end surface of the roller depending on the amount of oil on the end surface of the roller, thereby greatly reducing the end face of the roller and the annular thrust The contact resistance between the inner side faces of the bearing members in the chain width direction and the so-called thrust direction.

According to the transport chain of the invention of claim 6, in addition to the effect of the transport chain of the invention of any one of claims 1 to 5, the annular seal member is formed by an annular body having a uniform circumference and no cracks. Since the annular sealing member blocks the passage of the lubricating oil over the entire outer circumference of the annular thrust bearing member, it is possible to reliably prevent the external leakage of the lubricating oil and the intrusion of foreign matter from the outside.

According to the transport chain of the invention of claim 7, in addition to the effect of the transport chain of the invention of any one of claims 1 to 6, the sleeve includes The lubricating oil in the connecting pin is supplied to the oil introducing hole in the peripheral region of the roller, whereby the lubricating oil retained in the connecting pin supplies oil to the peripheral region of the roller through the oil introducing hole, so that maintenance is not required. The rolling of the sleeve and the roller and the rolling of the roller and the sleeve can be maintained for a long time.

The present invention may be any one of the specific embodiments, which is a conveyor chain, comprising: an inner connecting rod plate which is arranged with a pair of left and right sides; a sleeve, which is press-fitted a sleeve hole of the inner connecting rod; a roller rotatably slidably fitted to the outer circumference side of the sleeve; a connecting pin inserted through the inner circumferential side of the sleeve; and a left and right outer connecting rod plate Pressing and fitting the two ends of the connecting pin to connect the inner link plates to each other in the longitudinal direction of the chain; a plurality of rollers are disposed at intervals on the outer circumferential surface of the sleeve and the inner circumferential surface of the roller And a pair of right and left annular thrust bearing members press-fitted into the outer peripheral surface of the sleeve and spaced between the inner side surface of the inner link plate and the end surface of the roller at intervals; and the above-mentioned conveyor chain system The lubricating oil is sealed in the peripheral region of the roller, and the annular sealing member that is in close contact with the outer peripheral surface of the annular thrust bearing member and seals the lubricating oil is provided on the inner circumferential surface of the roller and the outer circumferential surface of the annular thrust bearing member. Between the outer side of the chain width direction of the annular sealing member The annular seal cap is press-fitted into the inner peripheral surface of the roller, whereby the annular seal member prevents oil from leaking to the outside of the lubricating oil in the peripheral region of the roller and prevents the outer periphery from the roller. The foreign matter in the area intrudes, and the lubricating oil is ensured for a long period of time, and the annular seal member is easily attached to the annular thrust bearing member.

That is, the annular sealing member used in the conveying chain of the present invention The specific cross-sectional shape may be such that the annular sealing member is in close contact with the outer circumferential surface of the annular thrust bearing member, and is disposed between the inner circumferential surface of the roller and the outer circumferential surface of the annular thrust bearing member, even if it includes a circular shape. Any one of a cross section, an elliptical cross section, and a rectangular cross section may be used. In the case of an annular sealing member including a rectangular cross section, the outer wall surface of the roller forming the annular groove forming portion and the inner side wall surface of the annular sealing cover are respectively surfaced. The contact state, thus further suppressing the leakage of the outside of the lubricating oil.

Further, the specific material of the annular sealing member used in the conveyor chain of the present invention may be any material, for example, if the annular sealing member is in close contact with the outer circumferential surface of the annular thrust bearing member. When the annular sealing member is formed of an elastic body composed of a synthetic resin, the annular sealing member exhibits self-lubricating properties, so that abrasion of the outer circumferential surface of the annular thrust bearing member can be avoided, and the ring can be suppressed for a long period of time. The externally generated lubricating oil between the thrust bearing member and the annular sealing member leaks out.

Moreover, the specific form of the bushing used in the conveyor chain of the present invention is not limited to any form as long as the roller is rotated and the annular thrust bearing member and the inner link plate are press-fitted into the outer peripheral portion. Alternatively, the annular thrust bearing member may be press-fitted into a uniform outer diameter in the width direction of the chain, or a large-diameter outer peripheral portion that rotates the roller, and disposed on both sides of the outer peripheral portion of the large diameter. In the case of the latter, in the case of the latter, the annular thrust bearing member can be positioned at the boundary between the outer peripheral portion of the large diameter and the outer peripheral portion of the small diameter, thereby achieving a simple assembly load and high assembly accuracy. .

Furthermore, regarding the above-mentioned uniform outer diameter in the width direction of the chain The specific casing may also be a longitudinally wrapped coil casing, a forged casing, or a molded oil-impregnated casing.

Further, the specific form of the connecting pin used in the conveying chain of the present invention may be any one of the forms of the connecting rod in the insertion sleeve and the both ends of the connecting rod. When the oil supply means for supplying the lubricating oil is provided, the oil can be continuously supplied to the peripheral portion of the roller, so that the rolling of the sleeve and the roller and the roller can be maintained for a long period of time without maintenance. The rolling of the rollers between each other.

[Examples]

Hereinafter, a conveyor chain according to an embodiment of the present invention will be described based on the drawings.

1 is a plan view showing a part of the conveyor chain of the present invention, FIG. 2 is a plan view of the conveyor chain shown in FIG. 1, and FIG. 3 is a sectional view of the conveyor chain shown in FIG. 2 is a side view of the conveyor chain shown in FIG. 5, FIG. 5 is an enlarged cross-sectional view of the main part of the conveyor chain shown in FIG. 3 from the XX line, and FIG. 6 is a view showing a state in which the roller of FIG. 5 is biased toward the thrust direction, Fig. 7 is an enlarged cross-sectional view showing a portion of the conveyor chain shown in Fig. 3 as viewed from line YY, and Fig. 8 is a view showing a state in which the roller of Fig. 7 is biased in the radial direction.

First, the conveyor chain 100 of an embodiment of the present invention is particularly suitable for loading weights of coils, billets, and the like in the iron field, as shown in FIGS. 1 to 3, including: inner link plates 110, 110, The sleeves 120 are arranged to be spaced apart from each other; the sleeve 120 is press-fitted into the sleeve hole 112 of the inner link plate 110; the roller 130 is slidably fitted outside the sleeve 120 a peripheral pin; a connecting pin 140 inserted into the inner peripheral side of the sleeve 120; and a pair of left and right outer link plates 150, 150 respectively press-fitted to the opposite ends of the connecting pin 140 to connect the inner link plate 110 The plurality of rollers 160 are disposed at intervals between the outer circumferential surface 120a of the sleeve 120 and the inner circumferential surface 130a of the roller 130; and a pair of right and left annular thrust bearing members 170, 170 is press-fitted into the outer peripheral surface 120a of the sleeve 120 and spaced between the inner side surface 110a of the inner link plate 110 and the end surface 160a of the roller 160.

Further, the conveying chain 100 encloses the lubricating oil in the peripheral region R of the above-described roller 160.

In addition, the annular thrust bearing member 170 is formed using a material such as a synthetic resin such as a fluororesin or a polyamide resin, or an oil-containing sintered metal or ceramic which is low in friction and excellent in wear resistance.

As shown in FIG. 2 and FIG. 3, the connecting pin 140 is formed therein to form an oil reservoir 142 for storing lubricating oil, and one end of the oil reservoir 142 is closed by the cover 144, so that the oil reservoir 142 passes through the oil passage. 146 supplies lubricating oil between the inner circumferential surface of the sleeve 120 and the outer circumferential surface of the connecting pin 140.

Further, as shown in FIGS. 2 and 3, the sleeve 120 is provided with an oil introduction hole 122 for supplying oil from the connection pin 140 to the peripheral space R of the roller 160 in the vicinity of the center in the longitudinal direction of the sleeve.

Thereby, the lubricating oil held in the connecting pin 140 is supplied with oil into the peripheral region R in which the plurality of rollers 160 are arranged at intervals via the oil introduction hole 122.

Next, the specific aspects of the annular sealing member 180 and the annular sealing cover 190 which are the greatest features of the conveying chain as an embodiment of the present invention are detailed in detail. Be explained.

First, as shown in FIG. 2 and FIG. 3, the annular seal member 180 which is in close contact with the outer peripheral surface 170a of the annular thrust bearing member 170 and seals the lubricating oil is provided on the inner circumferential surface 130a of the roller 130 and the annular thrust bearing member. 170 is between the outer peripheral surface 170a.

Thereby, the inner diameter of the annular seal member 180 is formed to be substantially the same size with respect to the outer diameter of the annular thrust bearing member 170.

Further, in the present embodiment, the annular sealing member 180 is made of an elastomer made of synthetic resin. However, any other material may be used as long as the lubricating oil is sealed in the peripheral region R of the roller 160.

In addition, as shown in FIG. 2 and FIG. 3, the annular seal cover 190 which is adjacent to the outer side in the chain width direction of the annular seal member 180 is press-fitted into the inner peripheral surface 130a of the roll 130.

Thereby, the inner circumferential surface 130a of the roller 130 is closed between the outer circumferential surface 190a of the annular seal cover 190, and the annular seal member 180 does not cause wear on the outer circumferential surface 170a of the annular thrust bearing member 170, and the annular seal The member 180 and the annular seal cover 190 reliably close the inner circumferential surface 130a of the roller 130 and the outer circumferential surface 170a of the annular thrust bearing member 170, and further, even when the lubricating oil is to be oozing out to the outside, the vertical direction Lubricating oil remains on the lower side from the inner circumferential surface 130a of the roller 130 to the inner circumferential surface 180a of the annular seal member 180.

Further, as shown in FIG. 3, the annular thrust bearing member 170 is press-fitted into the outer peripheral surface 120a of the sleeve 120 at a holding position of the roller 160 in the direction of the chain width of the roller 160, as shown in FIG. 130 contains the roller 160 The inner peripheral side flange portion 132 that is movable in the width direction of the chain and that allows the annular seal member 180 to be slightly moved in the chain width direction is sandwiched.

Thereby, the pair of left and right inner peripheral side flange portions 132 and 132 and the pair of left and right annular thrust bearing members 170 and 170 allow the roller 160 to be slightly moved in the chain width direction to be sealed in the peripheral region R of the roller 160. Lubricating oil is not distributed unevenly throughout.

Further, as shown in FIG. 5, the outer peripheral side surface 132a of the inner peripheral side flange portion 132 and the inner side wall surface 190b of the annular seal cover 190 are interposed between the groove wall surface 130b of the roller 130 and the outer peripheral surface 180a of the annular seal cover 180. An annular groove forming portion D that engages with the outer peripheral side portion 180b of the annular seal member 180 is formed in a state of being separated from the gap.

At this time, the roller 130 and the annular seal cover 190 are displaceable in the radial direction in a state in which the annular seal member 180 is sandwiched.

Thereby, the outer peripheral surface portion 180b of the annular seal member 180 and the groove wall surface 130b formed at the bottom of the annular groove forming portion D form a concave-convex engaging structure, and a so-called labyrinth structure is formed, and the outer peripheral side of the annular seal member 180 is formed. The portion 180b is relatively displaceable in the radial direction with respect to the roller 130 and the annular seal cap 190 in the annular groove forming portion D.

Further, as shown in FIG. 5, the annular seal member 180 is formed to have an outer diameter smaller than the bottom diameter of the annular groove forming portion D and larger than the inner diameter of the roller 130.

Thereby, even in the case of the conveyance drive, even if the roller 130 is eccentrically rotated in the radial direction with respect to the sleeve 120, or the roller 130 or the roller 160 is rotated in a skewed state with respect to the sleeve 120, The annular seal member 180 is also always engaged in the annular groove forming portion D to prevent the annular seal member 180 Inadvertently falling off.

As shown in FIG. 5, the annular seal member 180 is disposed to face the end surface 160a of the roller 160 with a gap therebetween.

Thereby, the lubricating oil stored in the oil storage region S between the end surface 160a of the roller 160 and the annular seal member 180 is supplied to the end surface 160a of the roller 160 depending on the amount of oil of the end surface 160a of the roller 160, and is greatly reduced. The contact resistance between the end face 160a of the roller 160 and the inner side surface 170b of the annular thrust bearing member 170 in the thrust direction.

Further, the annular seal member 180 is formed of an annular body which is uniform throughout the circumference and free from cracks.

Thereby, the annular seal member 180 blocks the passage of the lubricating oil over the entire outer circumference of the annular thrust bearing member 170, and reliably prevents the external leakage of the lubricating oil and the intrusion of foreign matter from the outside.

Further, as shown in FIG. 4, the outer surface 190c of the annular seal cover 190 is engaged by the four locking claws 134 of the inner peripheral edge portion 130c of the pressure roller 130.

Thereby, even when the annular seal cover 190 is to be relatively moved with respect to the roller 130 toward the outer side in the chain width direction, the locking claw 134 restricts the movement of the annular seal cover 190, and the annular seal cover 190 is surely prevented. Fall off.

Next, an operation of moving the roller 130 in the thrust direction will be described in detail based on FIGS. 5 and 6 .

First, the roller 130 is moved to the right side of the sheet of Fig. 6 by a force acting in the direction of the arrow of Fig. 6.

Next, the inner flange portion of the roller 130 formed on the left side of the paper surface of Fig. 6 132 abuts against the end face 160a of the roller 160 on the left side of the paper of Fig. 6, and pushes the roller 160 toward the right side of the sheet of Fig. 6.

Thereafter, the end surface 160a of the roller 160 on the right side of the paper surface of Fig. 6 abuts against the inner circumferential surface 170b of the annular thrust bearing member 170, and the movement of the roller 130 and the roller 160 in the thrust direction is completed.

When the series of operations described above are performed, the annular sealing member 180 sandwiched between the roller 130 and the annular seal cover 190 moves to the right side of the paper surface of FIG. 6 in response to the movement of the roller 130, and the inner circumferential surface 180a of the annular seal member 180 The outer circumferential surface 170a of the annular thrust bearing member 170 is not deformed, and the sliding contact state without load is always maintained, and the zero contact state is maintained.

Further, when the counter roller 130 acts in a direction opposite to the direction of the arrow in Fig. 6, the roller 130 and the roller 160 move in a bilaterally symmetrical manner with the above-described series of operations.

Next, an operation of moving the roller 130 in the radial direction based on FIGS. 7 and 8 will be described in detail.

First, the roller 130 is moved to the lower side of the paper surface of Fig. 8 by a force acting in the direction of the arrow of Fig. 8.

At this time, the roller 130 and the annular seal cap 190 are eccentrically moved to the lower side of the paper surface of FIG. 8 with respect to the central axis of the annular thrust bearing member 170 in a state in which the annular seal member 180 is sandwiched.

Then, when the outer circumferential surface 160b of any of the rollers 160 abuts against the outer circumferential surface 120a of the sleeve 120 and the inner circumferential surface 130a of the roller 130, the movement of the roller 130 and the roller 160 in the radial direction ends.

When the series of actions described above are performed, the inside of the annular sealing member 180 The side surface 180c is in sliding contact with the outer side wall surface 132a of the inner circumferential side flange portion 132, and the outer side surface 180d of the annular seal member 180 is in sliding contact with the inner side wall surface 190b of the annular seal cover 190. Further, when the opposing roller 130 acts in a direction opposite to the direction of the arrow in Fig. 8, the roller 130 moves in a vertically symmetrical manner with the above-described series of operations.

The transport chain 100 of the present embodiment thus obtained is provided with an annular seal member 180 that seals the lubricating oil by the outer peripheral surface 170a of the annular thrust bearing member 170, and is disposed on the inner circumferential surface 130a of the roller 130 and the annular thrust bearing. The outer peripheral surface 170a of the member 170 avoids the burden of elastically expanding the annular seal member 180 when the annular seal member 180 is fitted into the annular thrust bearing member 170, so that the annular seal member 180 can be easily attached.

In addition, the annular seal cap 190 which is covered by the outer side of the annular seal member 180 in the width direction of the chain is press-fitted into the inner peripheral surface 130a of the roller 130, even if the annular seal member 180 is contracted due to temperature rise. When a gap is formed between the inner circumferential surface 130a of the roller 130 and the outer circumferential surface 180a of the annular sealing member 180, the annular sealing cover 190 disposed adjacent to the roller 130 may also be self-rolling through the gap 130. The lubricating oil leaking to the outside between the inner circumferential surface 130a and the outer circumferential surface 180a of the annular sealing member 180 is sealed, and further, the annular sealing member 180 can suppress the lubricating oil supplied to the peripheral region R of the roller 160. The external leakage can prevent foreign matter from entering the peripheral region R of the roller 160 from the outside, and the lubricating oil can be retained for a long period of time.

Further, the annular thrust bearing member 170 is press-fitted into the outer peripheral surface of the sleeve 120 at a holding position that allows the micro-motion of the roller 160 in the chain width direction. 120a, the roller 130 includes an inner peripheral side flange portion 132 that sandwiches the roller 160 so as to be frettable in the chain width direction and allows the annular sealing member 180 to be slightly movable in the chain width direction, thereby smoothly The rolling of the sleeve 120 and the roller 160 and the rolling of the roller 130 and the roller 160 are achieved.

Further, the outer wall surface 132a formed on the inner peripheral side flange portion 132 of the roller 130 and the inner side wall surface 190b of the annular seal cover 190 form an annular groove forming portion D that engages with the outer peripheral side portion 180b of the annular seal member 180, Thereby, the external leakage of the lubricating oil which is likely to occur between the roller 130 and the annular sealing member 180 can be suppressed, and even when the roller 130 is eccentrically rotated in the radial direction with respect to the sleeve 120 during the conveyance driving, At this time, the annular seal member 180 does not contact the inner circumferential surface 130a of the roller 130, is subjected to load to avoid abrasion of the outer circumferential surface 170a of the annular thrust bearing member 170, and can suppress the annular thrust bearing member 170 and the annular seal member 180. The external leakage of the easily generated lubricating oil is very effective.

100, 500‧‧‧ conveyor chain

110, 510‧‧‧ inner connecting rod plate

110a, 170b, 180c‧‧‧ inside

112, 512‧‧‧ casing holes

120, 520‧‧‧ casing

120a, 160b, 170a, 190a, 570a‧‧‧ outer perimeter

122‧‧‧ oil introduction hole

130, 530‧‧‧ Roll

130a, 180a, 530a‧‧‧ inner circumference

130b‧‧‧ slot wall

130c‧‧‧ inner peripheral edge

132‧‧‧Inside flange

132a‧‧‧Outer side wall

134‧‧‧Card claws

140, 540‧‧‧ Connection pins

142‧‧‧Oil Storage Department

144‧‧‧ cover

146‧‧‧ oil path

150, 550‧‧‧ outer connecting rod

160, 560‧‧ ‧rollers

160a, 560a‧‧‧ end face

170‧‧‧Ringed thrust bearing components

180‧‧‧Aperture sealing member

180b‧‧‧ peripheral part

180d, 190c‧‧‧ outside

190‧‧‧Aperture seal cap

190b‧‧‧ inner side wall

D‧‧‧ annular groove forming part

R‧‧‧ surrounding area

S‧‧‧ oil storage area

570‧‧‧ thrust bearing plate

580‧‧‧ sealing ring

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall schematic view showing a partial cut of a conveyor chain according to an embodiment of the present invention.

Figure 2 is a plan view of the conveyor chain shown in Figure 1.

Figure 3 is a cross-sectional view of the conveyor chain shown in Figure 2.

Figure 4 is a side elevational view of the conveyor chain of Figure 2.

Fig. 5 is an enlarged cross-sectional view showing the main part of the conveyor chain shown in Fig. 3 as viewed from the X-X line.

Fig. 6 is a view showing a state in which the roller of Fig. 5 is biased toward the thrust direction.

Fig. 7 is an enlarged cross-sectional view showing the main part of the conveyor chain shown in Fig. 3 as viewed from the Y-Y line.

Fig. 8 is a view showing a state in which the roller of Fig. 7 is biased in the radial direction.

Figure 9 is a cross-sectional view showing a prior art conveyor chain.

100‧‧‧Transport chain

110‧‧‧Internal link plate

120‧‧‧ casing

130‧‧‧roll

140‧‧‧Card claws

150‧‧‧Outer link plate

160‧‧‧Roller

170‧‧‧Ringed thrust bearing components

180‧‧‧Aperture sealing member

190‧‧‧Aperture seal cap

Claims (7)

A conveyor chain comprising: an inner connecting rod plate which is arranged with a pair of left and right sides; a sleeve which is press-fitted into a sleeve hole of the inner connecting rod plate; and a roller which is slidably fitted and slidably a peripheral side of the sleeve; a connecting pin inserted through the inner peripheral side of the sleeve; and a left and right outer connecting rod plate respectively press-fitted to the both ends of the connecting pin and the inner connecting rod is arranged on the chain The longitudinal direction is connected to each other; a plurality of rollers are disposed between the outer circumferential surface of the sleeve and the inner circumferential surface of the roller at intervals; and a pair of right and left annular thrust bearing members are press-fitted into the above The outer circumferential surface of the sleeve is spaced between the inner side surface of the inner link plate and the end surface of the roller; and the conveying chain is formed by sealing the lubricating oil in a peripheral region of the roller, and the conveying chain is An annular sealing member that is in close contact with the outer circumferential surface of the annular thrust bearing member and seals the lubricating oil is provided between the inner circumferential surface of the roller and the outer circumferential surface of the annular thrust bearing member, and the annular seal The outer side of the chain width direction of the member is abutted and covered The annular seal cap is press-fitted into the inner circumferential surface of the roller, and the annular thrust bearing member is press-fitted into the outer circumferential surface of the sleeve at a clamping position that allows the roller to be slightly moved in the chain width direction. Further, the roller includes an inner circumferential side flange portion that sandwiches the roller so as to be frettable in the chain width direction and to position the annular sealing member in a frusable manner in the chain width direction. The conveyor chain of claim 1, wherein the outer side wall surface formed on the inner flange portion of the roller and the inner side wall surface of the annular seal cover form an annular groove that engages with the outer peripheral side portion of the annular seal member. unit. The transport chain of claim 2, wherein the annular seal member is formed by an outer diameter smaller than a bottom diameter of the annular groove forming portion and larger than an inner diameter of the roller. The transport chain according to any one of claims 1 to 3, wherein the outer side surface of the annular seal cover is engaged by a locking claw that presses an inner peripheral edge portion of the roller. The conveyor chain of claim 1, wherein the annular sealing member is disposed opposite to the end surface of the roller. The conveyor chain of claim 1, wherein the annular sealing member is formed of an annular body that is uniform throughout the circumference and free of cracks. The conveyor chain of claim 1, wherein the sleeve comprises an oil introduction hole for supplying the lubricating oil in the connecting pin to a peripheral region of the roller.