JP2022101848A - Chain sprocket wheel and chain movable device - Google Patents

Abstract

To provide a chain sprocket wheel which is capable of exchanging only a part of a partial wheel without stopping drive, and in which backlash of the partial wheel to a stationary platen hardly occurs.SOLUTION: The present invention relates to a chain sprocket wheel 1 in which a chain is laid over an outer periphery. The chain sprocket wheel comprises a wheel part 2 including a number of teeth 4 to which the chain is engaged, and a stationary platen 3. The wheel part 2 is divided into a plurality of partial wheels 5 in a circumferential direction. Each of partial wheels 5 is mounted onto the stationary platen 3 in a removable manner by a bolt 8 disposed in a circumferential direction. A projection 11 is formed in any one of composition planes of the stationary platen 3 and the partial wheel 5, and a recess 12a is formed in the other. The projection 11 and the recess 12 are engaged and in the partial wheel 5, the projection 11 or the recess 12b is formed on the composition plane with the stationary platen 3 and on an opposite side of the composition plane and even if the partial wheel 5 is inverted, the same can be mounted onto the stationary platen 3.SELECTED DRAWING: Figure 9

Description

The present invention relates to a chain sprocket wheel and a chain movable device that move a chain hung on the outer circumference in the length direction.

A plurality of chain sprocket wheels of a chain mechanism used in a general chain movable device are arranged, a chain is hung on the outer periphery thereof, and at least one chain sprocket wheel is rotated by a drive device, and the rotational force is transmitted to the chain. It is designed to move in the length direction.
Since the chain is engaged with a part of the teeth of the chain sprocket wheel, a large load is applied to these teeth, which is liable to be damaged or worn. In particular, in a chain conveyor for transporting heavy objects and a chain mechanism of a sludge scraping device, the chain sprocket wheel is frequently replaced because the teeth are severely damaged. At this time, replacing the entire large chain sprocket wheel not only required a large amount of labor and working time, but was also very costly.
The same applies to the driven chain sprocket wheel.

Therefore, conventionally, Patent Document 1 discloses a chain sprocket wheel which is composed of a wheel main body and a fixed plate on which the wheel main body is attached and fixed, and the wheel main body is formed in a replaceable split type.
Such a split-type chain sprocket wheel can be used with a part of the split piece of the wheel body while the chain is hung when the tooth is partially damaged or worn out and cannot be used. It can be repaired just by replacing it.

Japanese Unexamined Patent Publication No. 2002-356217

However, in a chain sprocket wheel as described in Patent Document 1, since the split piece of the wheel body and the fixing plate are attached and fixed only by bolts and nuts, when a large force is applied to a part of the tooth, the split piece is applied. There was a risk that the wheel would rattle against the fixed plate and the force would not be sufficiently transmitted to and from the chain.
For this reason, in addition to fixing bolts and nuts, it is also conceivable to provide a convex portion on one of the split piece and the fixing plate and a concave portion on the other to engage both of them to prevent rattling. ..
On the other hand, the teeth of the chain sprocket wheel may be unevenly worn in one direction in the rotation direction.
The problem to be solved by the present invention is that only a part of the partial wheel can be replaced without removing the chain, the partial wheel is less likely to rattle against the fixed plate, and it is efficient even when uneven wear occurs. The purpose is to provide a chain sprocket wheel that can be used in various ways.

The invention according to claim 1 of the present application is a chain sprocket wheel for hanging a chain on the outer periphery, comprising a wheel portion having a large number of teeth on which the chain engages, and a fixing plate, and the wheel portion is provided in the circumferential direction. It is divided into a plurality of partial wheels, and each partial wheel is detachably attached to the fixed plate by a fastener arranged in the circumferential direction, and a convex portion is provided on either one of the joint surfaces of the fixed plate and the partial wheel. However, a concave portion is formed on the other side, and the convex portion and the concave portion are engaged with each other. It is a chain sprocket wheel that is formed and can be attached to the fixed plate even if the partial wheel is inverted.

The invention according to claim 2 of the present application has a plurality of fasteners, the distance between the fasteners in one partial wheel in the circumferential direction, and the other adjacent partial wheels of the fasteners in the one partial wheel. The first aspect of claim 1, wherein the distance between the fastener located on the side and the fastener located on the one partial wheel side of the fasteners in the other partial wheel is the same in the circumferential direction. It is a chain sprocket wheel.

The invention according to claim 3 of the present application is the chain sprocket wheel according to claim 1 or 2, wherein a gap is formed between the adjacent partial wheels.

The invention according to claim 4 of the present application is the chain sprocket wheel according to any one of claims 1 to 3, wherein the wheel portion is divided in the circumferential direction through the valley portion of the tooth. ..

The invention according to claim 5 of the present application is a chain movable device including a drive chain sprocket wheel, a driven chain sprocket wheel, and a chain spanned around the outer periphery of the drive chain sprocket wheel and the precursor driven chain sprocket wheel. The drive chain sprocket wheel and the driven chain sprocket wheel each include a wheel portion having a large number of teeth to which the chain engages and a fixing plate, and the wheel portion is divided into a plurality of partial wheels in the circumferential direction. Each partial wheel is detachably attached to the fixed plate by a plurality of fasteners arranged in the circumferential direction, and a convex portion is formed on one of the joint surfaces of the fixed plate and the partial wheel, and a concave portion is formed on the other. At the same time, the convex portion and the concave portion are engaged with each other, and the convex portion or the concave portion is formed on the joint surface with the fixing plate and the opposite surface of the joint surface on the partial wheel, and the partial wheel is formed. It can be attached to the fixed plate even if it is inverted, and the distance between the fasteners in the partial wheel of the drive chain sprocket wheel in the circumferential direction and the circumference between the fasteners in the partial wheel of the driven chain sprocket wheel. The distance in the direction is the same, and the plurality of fasteners arranged on the partial wheels are the first fastener and the second anchor arranged behind the first fastener in the rotational direction of the partial wheel. The drive chain sprocket wheel has a fastener, and the distance from the rotation center of the wheel portion on which the first fastener is arranged is the rotation center of the wheel portion on which the second fastener is arranged. The driven chain sprocket wheel is longer than the distance from, and the distance from the rotation center of the wheel portion on which the first fastener is arranged is from the rotation center of the wheel portion on which the second fastener is arranged. The distance from the center of rotation of the wheel portion of the drive chain sprocket wheel on which the first fastener is arranged, and the rotation of the wheel portion of the driven chain sprocket wheel on which the second fastener is arranged. The distance from the center is the same, the distance from the rotation center of the wheel portion where the second fastener in the drive chain sprocket wheel is arranged, and the first fastener in the driven chain sprocket wheel are arranged. The distance from the center of rotation of the wheel portion is the same, and the drive chain sp. It is a chain movable device characterized in that it is possible to invert the partial wheel of either the rocket wheel or the driven chain sprocket wheel and attach it to the fixed plate of the other.

According to the present invention, if any of the partial wheels fails, the partial wheel is moved to a position where it does not engage with the chain, and only the worn or damaged partial wheel can be easily replaced without removing the chain. This makes it possible to significantly reduce the labor and cost required for replacement.
Further, since the partial wheel attached by the fastener is engaged with the concave portion and the convex portion formed on the joint surface with the fixing plate, the partial wheel is fixed even if a large force is applied to a part of the tooth. It is possible to prevent rattling on the board.
Further, the partial wheel has a convex portion or a concave portion formed on the joint surface with the fixed plate and the opposite surface of the joint surface, and even if the partial wheel is inverted, it can be mounted by being fitted with the fixed plate in an uneven manner. It has become. With such a configuration, when uneven wear (one-sided reduction) occurs in the partial wheel, the partial wheel can be inverted and attached to the fixed plate, and the running cost can be significantly reduced. Further, the drive chain sprocket wheel and the driven chain sprocket wheel can share the partial wheel, and the manufacturing cost of the partial wheel can be suppressed.

In addition, the distance between the fasteners in one partial wheel and the fasteners located on the side of the other adjacent partial wheels of the fasteners in one partial wheel and one of the fasteners in the other partial wheel. By keeping the distance from the fastener located on the side the same, when assembling the chain sprocket wheel for the first time, the partial wheel can be easily attached to the fixing plate, and the assembling work can be performed efficiently. Is possible.

In addition, by forming a gap between the partially arranged partial wheels, it is possible to prevent the partial holes from competing with each other and facilitate the attachment and detachment of the partial wheels.

In addition, since the wheel portion is divided in the circumferential direction through the valley portion of the tooth, the contact surface is reduced and the attachment / detachment becomes easier as compared with the division between the mountain portions.

The front view of the chain sprocket wheel which concerns on 1st Embodiment of this invention. Sectional drawing of the chain sprocket wheel which concerns on 1st Embodiment of this invention. The front view of the fixed plate which concerns on 1st Embodiment of this invention. The front view of the partial wheel which concerns on 1st Embodiment of this invention. The front view of the chain movable device which concerns on 2nd Embodiment of this invention. FIG. 3 is a sectional view of a drive chain sprocket wheel according to a second embodiment of the present invention. The front view of the fixed plate which concerns on 2nd Embodiment of this invention. The front view of the partial wheel which concerns on the 2nd Embodiment of this invention. Explanatory drawing which shows attachment / detachment of a partial wheel which concerns on 2nd Embodiment of this invention. Explanatory drawing which shows attachment / detachment of a partial wheel which concerns on 2nd Embodiment of this invention. Explanatory drawing which shows attachment / detachment of a partial wheel which concerns on 2nd Embodiment of this invention. Explanatory drawing which shows attachment / detachment of a partial wheel which concerns on 2nd Embodiment of this invention. The front view of the chain sprocket wheel which concerns on the 3rd Embodiment of this invention. The figure explaining the effect in 3rd Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Needless to say, the present invention is not limited to the embodiments.

[First Embodiment]
Hereinafter, the first embodiment of the present invention will be described together with FIGS. 1 to 4.
FIG. 1 is a front view of the chain sprocket wheel according to the first embodiment, FIG. 2 is a sectional view of the chain sprocket wheel according to the first embodiment, and FIG. 3 is a fixed plate according to the first embodiment. FIG. 4 is a front view of the partial wheel according to the first embodiment.

In the first embodiment, the chain sprocket wheel 1 is a drive chain sprocket wheel that moves a chain (not shown) hung on the outer periphery in the length direction.
As shown in FIGS. 1 and 2, the chain sprocket wheel 1 includes a wheel portion 2 and a disk-shaped fixing plate 3.
The wheel portion 2 has a large number of teeth 4 on the outer periphery thereof to which a chain is engaged, and the teeth 4 include a ridge portion 41 and a valley portion 42.

The wheel portion 2 is divided into a plurality of (8 in this embodiment) partial wheels 5 at equal intervals in the circumferential direction. This number of divisions may be set as the number of divisions so that at least one partial wheel 5 with which the chain does not engage exists even when the chain is hung in a U-turn shape.
The wheel portion 2 is divided along a dividing line extending in the radial direction through the mountain portion 41 of the tooth 4, and is formed in a disk shape as a whole by combining all the partial wheels 5 in the circumferential direction. Further, when all the partial wheels 5 are combined, a slight gap 7 is formed between the adjacent partial wheels 5.

The partial wheel 5 is independently detachably fixed to one surface of the fixing plate 3 by a bolt 8 inserted into a bolt hole 9 (see FIG. 3) of the fixing plate 3 and a bolt hole 10 (see FIG. 4) of the partial wheel 5. The wheel.
Two bolts 8 are provided for one partial wheel 5, and these bolts are a first bolt 8a and a second bolt arranged behind the first bolt 8a in the rotational direction of the partial wheel 5. It is composed of 8b. The bolt 8, the first bolt 8a, and the second bolt 8b correspond to the fastener, the first fastener, and the second fastener of the present invention, respectively.

As shown in FIG. 1 and the like, the first bolt 8a (first fastener) and the second bolt 8b (second fastener) for fixing the partial wheel 5 are arranged concentrically with the rotation center of the wheel portion 2, respectively. ing. That is, the distance from the rotation center of the wheel portion 2 where the first bolt 8a is arranged and the distance from the rotation center of the wheel portion 2 where the second bolt 8b is arranged are the same.

As shown in FIGS. 2 and 3, the fixing plate 3 includes a cylindrical portion 30 for passing a shaft (not shown) and a circular crossguard-shaped wheel fixing portion 31 for attaching the wheel portion 2.
A fixing flange 32 is formed along the inner peripheral edge on one surface of the wheel fixing portion 31 (the surface on the front side to which the wheel portion 2 is joined), and the inner peripheral surface of the fixing flange 32 is the outer peripheral surface of the tubular portion 30. It is fixed to the wheel by welding or the like.

As shown in FIGS. 2 and 3, a circular convex portion 11 is formed on one surface of the wheel fixing portion 31 along the entire outer peripheral edge.
As shown in FIGS. 2 and 4, recesses 12a and 12b that engage with the convex portion 11 of the fixing plate 3 are formed along the circumferential direction on the surface of the partial wheel 5 that is joined to the fixing plate 3. Specifically, the concave portion 12b is formed on the front surface, and the concave portion 12a is formed on the back surface that is currently engaged with the convex portion 11.
When the inner peripheral surface of the partial wheel 5 is brought into contact with the outer peripheral surface of the fixing flange 32, the partial wheel 5 and the fixing plate 3 are positioned in the radial direction, and the convex portion 11 and the concave portion 12a or the concave portion 12b are easily engaged with each other. At the same time, the bolt holes 9 and 10 can be easily aligned.

Since the circular convex portion 11 is formed along the entire outer peripheral edge of the wheel fixing portion 31, it is easy to process the convex portion 11.
When the chain sprocket wheel 1 is rotated to drive the chain, an uneven force is applied to the teeth 4 of the partial wheel 5, and the partial wheel 5 tries to rattle against the fixed plate 3 but extends in the circumferential direction. The convex portion 11 of the fixing plate 3 and the concave portion 12a or the concave portion 12b of the partial wheel 5 engage with each other to suppress rattling.

If uneven wear (one-sided reduction) occurs on the partial wheel 5, loosen and remove the bolt 8 to disengage the concave portion 12a on the back side of the partial wheel 5 and the convex portion 11 and invert it to the front side. The concave portion 12b is engaged with the convex portion 11, that is, the partial wheel 5 is attached with the back surface facing the front side. By doing so, it is possible to cope with uneven wear without replacing the new partial wheel, and it is possible to significantly reduce the running cost. Further, if the target partial wheel 5 is positioned on the portion where the chain is not laid and then the work is performed, the work can be performed without removing the chain.
Further, if the partial wheel 5 can be shared between the drive chain sprocket wheel and the driven chain sprocket wheel, they can be exchanged with each other and the cost can be similarly suppressed.

If any of the partial wheels 5 is worn or damaged, the partial wheels 5 are moved to a position where they do not engage with the chain without removing the chain from the chain sprocket wheel 1, and the first bolt 8a and the second bolt 8b are moved. It is also possible to remove the removed, worn / damaged partial wheel 5 and install a new partial wheel 5.

A gap 7 is formed between the partial wheels 5 arranged adjacent to each other. Since the gap 7 is formed in this way, when the partial wheel 5 is attached or detached, the adjacent partial wheel 5 and the partial wheel 5 to be removed do not compete with each other, and the partial wheel 5 is not disturbed by the adjacent partial wheel 5, and the partial wheel can be easily attached. 5 can be removed. Further, even in the mounting, the work can be performed without being disturbed by the adjacent partial wheel 5.

In the present embodiment, the distance between the bolts in one partial wheel 5 in the circumferential direction (distance indicated by a in FIG. 1) and the other adjacent partial wheel 5 of the bolts fixing the one partial wheel 5 Since the distance in the circumferential direction (distance shown by b in FIG. 1) between the bolt located on the side and the bolt located on the partial wheel side of one of the bolts fixing the other partial wheel 5 is different, The partial wheel had to be mounted where it is shown in FIG. 1a. However, even if the bolt holes 9 and 10 are arranged so that the distance indicated by a and the distance indicated by b in FIG. 1 are the same distance, that is, all the bolts 8 are arranged at equal intervals in the circumferential direction. good. With such a configuration, for example, when assembling the wheel portion 2 of the chain sprocket wheel 1 for the first time, the partial wheel 5 can be easily attached from any position on the wheel fixing portion 31, and the assembling work is efficient. It becomes possible to do it in a targeted manner.

[Second Embodiment]
Hereinafter, the second embodiment according to the present invention will be described together with FIGS. 5 to 12. The same parts as in the first embodiment will be omitted, and different parts will be mainly described.

5 is a front view of the chain movable device according to the second embodiment, FIG. 6 is a sectional view of the drive chain sprocket wheel according to the second embodiment, and FIG. 7 is a fixed view according to the second embodiment. It is a front view of a board, FIG. 8 is a front view of a partial wheel according to a second embodiment, and FIGS. 9 to 12 are explanatory views showing attachment / detachment of a partial wheel according to a second embodiment.

FIG. 5 shows a chain movable device. The upper chain sprocket wheel 1 is a drive chain sprocket wheel, the lower chain sprocket wheel 1 is a driven chain sprocket wheel, the chain hung is not shown, and the arrow indicates each chain sprocket wheel. Indicates the direction of rotation of the wheel and the direction of movement of the chain.

The upper chain sprocket wheel 1 on the drive side is the same as in the first embodiment, but the mounting positions of the first bolt 8a and the second bolt 8b from the rotation center of the wheel portion 2 are different. .. That is, the distance from the rotation center of the wheel portion 2 where the first bolt 8a is arranged and the distance from the rotation center of the wheel portion 2 where the second bolt 8b is arranged are different.
By arranging in this way, even if a large force is applied to the teeth 4 in the movable direction of the chain, the partial wheel 5 can further prevent rattling with respect to the fixed plate 3.

Specifically, the distance from the rotation center of the wheel portion 2 where the first bolt 8a is arranged is set to be longer than the distance from the rotation center of the wheel portion 2 where the second bolt 8b is arranged. (Figs. 5 and 6). Further, for that purpose, bolt holes 9 and 10 provided in the fixing plate and the partial wheel 5 are also arranged (FIGS. 7 and 8).
As a result, since it is a drive chain sprocket wheel, it is possible to increase the yield strength against the rotational moment acting on the opposite side of the rotation direction of the partial wheel 5 from the chain caused by the rotation of the chain sprocket wheel 1 to prevent rattling. Can be done.

The lower chain sprocket wheel 1 on the driven side is the same as the upper chain sprocket wheel, but the mounting positions of the first bolt 8a and the second bolt 8b are different. Specifically, the distance from the rotation center of the wheel portion 2 where the first bolt 8a is arranged is the rotation of the wheel portion 2 of the second bolt 8b arranged behind the first bolt 8a in the rotation direction. The bolt 8 is arranged shorter than the distance from the center.

Since the lower chain sprocket wheel 1 on the driven side rotates in the direction of the arrow as the chain (not shown) hung on the outer circumference moves, the partial wheel 5 of the chain sprocket wheel 1 has a movable chain. The rotational moment in the direction of rotation of the partial wheel from the chain generated by this will act.
Correspondingly, by arranging the first bolt 8a and the second bolt 8b as described above, it is possible to increase the yield strength against the rotational moment acting in the rotational direction of the partial wheel 5 from the chain caused by the movement of the chain. can.

The distance from the center of rotation of the wheel portion 2 where the first bolt 8a of the upper chain sprocket wheel 1 is arranged and the center of rotation of the wheel portion 2 where the second bolt 8b of the lower chain sprocket wheel 1 is arranged. The distance is the same, the distance from the rotation center of the wheel portion 2 where the second bolt 8b is arranged in the upper chain sprocket wheel 1 and the wheel where the first bolt 8a in the lower chain sprocket wheel 1 is arranged. The distance from the center of rotation of the part 2 is the same.

The circumferential distance between the bolts in the partial wheel 5 of the upper chain sprocket wheel 1 (distance indicated by a in FIG. 5) and the circumferential distance between the bolts in the partial wheel 5 of the lower chain sprocket wheel 1. It is the same as the distance (distance shown by a in FIG. 5).

Further, of the bolts for fixing one partial wheel 5 of the upper chain sprocket wheel 1, the bolt located on the adjacent other partial wheel 5 side and the one partial wheel side of the bolts for fixing the other partial wheel 5. Circumferential distance between the bolts located at (the distance shown by b in FIG. 5) and the other adjacent partial wheel 5 of the bolts that secure one partial wheel 5 of the lower chain sprocket wheel 1. The distance in the circumferential direction (distance shown by b in FIG. 5) between the bolt located on the side and the bolt located on the partial wheel side of one of the bolts fixing the other partial wheel 5 is the same. ..

The correspondence when uneven wear occurs in the partial wheel 5 will be described together with FIGS. 9 to 12.
In FIGS. 9 to 12, the lower two partial wheels 5a and 5b of the upper chain sprocket wheel 1 and the upper two partial wheels 5c and 5d of the lower chain sprocket wheel 1 have chains (not shown). The partial wheel 5 at a position where it is not engaged.

As shown in FIG. 9, the left partial wheel 5a of the lower two partial wheels of the upper chain sprocket wheel 1 and the right partial wheel 5c of the upper two partial wheels of the lower chain sprocket wheel 1 Is removed from the fixing plate 3. The method of removal is the same as that of the first embodiment.

Next, as shown in FIG. 10, the removed partial wheels 5a and 5c are inverted, replaced, and attached to the fixed plate 3. Specifically, with the back side of the partial wheels 5a and 5c facing the front side, the recesses 12b formed on the front side are engaged with the convex portions 11 of the fixing plate 3 to be replaced, and the bolt holes 9, 10 Are combined and connected with bolts (not shown).
In this way, the partial wheels 5a and 5c of the upper chain sprocket wheel 1 on the drive side and the lower chain sprocket wheel 1 on the driven side can be inverted and attached to the other fixed plate 3.

Next, as shown in FIG. 11, of the lower two partial wheels of the upper chain sprocket wheel 1, the right partial wheel 5b and the left side of the upper two partial wheels of the lower chain sprocket wheel 1. The partial wheel 5d is removed from the fixing plate 3.

Next, as shown in FIG. 12, the removed partial wheels 5b and 5d are inverted, replaced, and attached to the fixed plate 3. Specifically, with the back side of the partial wheels 5b and 5d facing the front side, the recesses 12b formed on the front side are engaged with the convex portions 11 of the fixing plate 3 to be replaced, and the bolt holes 9, 10 Are combined and connected with bolts (not shown).
In this way, the partial wheels 5b and 5d of the upper chain sprocket wheel 1 on the drive side and the lower chain sprocket wheel 1 on the driven side can be inverted and attached to the other fixed plate 3.

Then, the chain sprocket wheel is rotated, and the partial wheel to be replaced next is moved to a position where the chain does not engage, and the same work as described above is performed.

[Third Embodiment]
Hereinafter, a third embodiment according to the present invention will be described together with FIGS. 13 and 14. The same parts as those of the first and second embodiments will be omitted, and different parts will be mainly described. FIG. 13 is a front view of the chain sprocket wheel 1 according to the third embodiment, showing the drive chain sprocket wheel 1.

In the third embodiment, the wheel portion 2 is divided into a plurality of partial wheels 5 along a dividing line extending in the radial direction through the valley portion 42 of the tooth 4.
When the wheel portion 2 is divided by the valley portion 42 of the teeth 4 in this way, the strength is slightly lower than that divided by the mountain portion 41, and the space between the partial wheels 5 is easily opened. Since the portion that can come into contact with the partially arranged partial wheels 5 is reduced, the adjacently arranged partial wheels 5 do not get in the way and can be easily attached and detached. In addition, compared to the one divided by the mountain portion 41, there are fewer parts that can come into contact with the adjacent partial wheels 5 when attaching and detaching, so the possibility of pinching fingers is reduced and safe attachment and detachment work is performed. be able to.

The eight attached partial wheels 5 are provided so as to pass through the joint surface of the wheel fixing portion 31 so as to be flush with each other, but there is a step between the adjacent partial wheels 5 when attaching and detaching. May occur. Even in such a case, if the plurality of partial wheels 5 are divided along the dividing line extending in the radial direction through the valley portion 42 of the tooth 4, the presence of the step on the movement of the chain has an influence. It can be made smaller and contributes to the smooth movement of the chain. This effect will be specifically described with reference to FIG.
14A and 14B are views for explaining this effect, and FIG. 14A is an enlarged plan view of a portion of the wheel portion 2 divided by the mountain portion 41 of the tooth 4 (viewed from the direction A in FIG. 5). ), FIG. 14 (b) shows a third embodiment, and is an enlarged plan view of a portion of the wheel portion 2 divided by the valley portion 42 of the tooth 4 (viewed from the direction B in FIG. 13). Is.

Regarding the distance of the divided mountain portion 41 with respect to the step Z when the adjacent partial wheels 5 and 5 arranged through the gap 7 have a step Z, the mountain portion of the tooth 4 is as shown in FIG. 14 (a). In the case of being divided by 41, the distance of the divided mountain portions 41 is L1 of the gap 7. On the other hand, in the case where the teeth 4 are divided by the valley 42 as shown in FIG. 14 (b), the distance between the divided peaks 41 is L2, which is larger than the gap 7 by the valleys 42 and 42 minutes. In the case of being divided by 42, the distance at which the same step Z of the mountain portion 41 occurs becomes long.
From this, the influence of the step of the mountain portion 41 on the chain is relatively smaller in the case of being divided by the valley portion 42 in FIG. 14 (b). Moreover, in the case of being divided by the mountain portion 41 of FIG. 14 (a), a step Z is generated between the mountain portions 41 engaged with one hole of the chain, but the step Z is divided by the valley portion 42 of FIG. 14 (b). In this case, a step Z is generated between the mountain portions 41 that engage with the two holes of the chain, and the influence of the step on the chain is reduced.

[Other variants]
The present invention is not limited to the above embodiment. For example, the following are also included.

In the present embodiment, the wheel portion is divided into eight partial wheels, but the number of divisions can be appropriately changed depending on the size of the chain sprocket wheel, the angle at which the chain is engaged, and the like.

In the present embodiment, a convex portion is formed on the fixed plate and a concave portion is formed on the partial wheel, but of course, a concave portion may be formed on the fixed plate and a convex portion may be formed on the partial wheel.

In the present embodiment, the circular convex portion 11 is formed along the entire outer peripheral edge of the wheel fixing portion 31, but the present invention is not limited to this. It may be provided intermittently rather than along the entire outer peripheral edge. Further, a convex portion may be formed on the inner joint surface instead of the outer peripheral edge. The shape of the convex portion is not limited to the embodiment. In the present embodiment, it is provided so as to be curved in the circumferential direction, but it may be provided in a polygonal shape or long in the radial direction as long as it can be inverted and attached to and detached from the fixed plate.

In the present embodiment, each partial wheel is attached to the fixing plate with two bolts, the first bolt and the second bolt, but the present invention is not limited to this, and one bolt may be attached to the fixing plate.

In the present embodiment, each partial wheel is attached to the fixing board with two bolts of the first bolt and the second bolt, but it may be attached with three or more bolts depending on the size of the partial wheel.

In the present embodiment, the work of attaching / detaching the partial wheel corresponding to uneven wear has been described with the chain attached, but the chain may be removed. In this case, the wheel portion can be attached / detached to / from the partial wheel at an arbitrary position without rotating the wheel portion.

Each technical matter in any embodiment may be applied to other embodiments as examples.

1 Chain sprocket wheel 2 Wheel part 3 Fixing board 4 Teeth 5 Partial wheel 7 Gap 8 Bolt 8a First bolt (first fastener)
8b Second bolt (second fastener)
9, 10 Bolt holes 11 Convex parts 12a, 12b Concave parts 30 Cylindrical parts 31 Wheel fixing parts 32 Fixing flanges

Claims (5)

A chain sprocket wheel that hangs the chain around the circumference.
A wheel portion having a large number of teeth to which the chain is engaged, a fixing plate, and the like are provided.
The wheel portion is divided into a plurality of partial wheels in the circumferential direction, and each partial wheel is detachably attached to the fixing plate by a fastener arranged in the circumferential direction.
A convex portion is formed on one of the joint surfaces of the fixed plate and the partial wheel, and a concave portion is formed on the other, and the convex portion and the concave portion are engaged with each other.
The partial wheel is formed with the convex portion or the concave portion on the joint surface with the fixed plate and the opposite surface of the joint surface, and can be attached to the fixed plate even if the partial wheel is inverted. A chain sprocket wheel featuring. There are multiple fasteners,
Of the fasteners in the circumferential direction between the fasteners in one said partial wheel, the fasteners located on the adjacent other partial wheel side of the fasteners in the one partial wheel, and the fasteners in the other partial wheel. The chain sprocket wheel according to claim 1, wherein the distance to the fastener located on the one partial wheel side in the circumferential direction is the same. The chain sprocket wheel according to claim 1 or 2, wherein a gap is formed between the adjacent partial wheels. The chain sprocket wheel according to any one of claims 1 to 3, wherein the wheel portion is divided in the circumferential direction through the valley portion of the tooth. A chain movable device comprising a drive chain sprocket wheel, a driven chain sprocket wheel, and a chain spanned around the outer periphery of the drive chain sprocket wheel and the precursor driven chain sprocket wheel.
The drive chain sprocket wheel and the driven chain sprocket wheel each include a wheel portion having a large number of teeth to which the chain engages and a fixing plate.
The wheel portion is divided into a plurality of partial wheels in the circumferential direction, and each partial wheel is detachably attached to the fixing plate by a plurality of fasteners arranged in the circumferential direction.
A convex portion is formed on one of the joint surfaces of the fixed plate and the partial wheel, and a concave portion is formed on the other, and the convex portion and the concave portion are engaged with each other.
The partial wheel is formed with the convex portion or the concave portion on the joint surface with the fixed plate and the opposite surface of the joint surface, and can be attached to the fixed plate even if the partial wheel is inverted.
The distance in the circumferential direction between the fasteners in the partial wheel of the drive chain sprocket wheel is the same as the distance in the circumferential direction between the fasteners in the partial wheel of the driven chain sprocket wheel.
The plurality of fasteners arranged on each partial wheel have a first fastener and a second fastener arranged behind the first fastener in the rotational direction of the partial wheel.
In the drive chain sprocket wheel, the distance from the rotation center of the wheel portion on which the first fastener is arranged is longer than the distance from the rotation center of the wheel portion on which the second fastener is arranged.
In the driven chain sprocket wheel, the distance from the rotation center of the wheel portion on which the first fastener is arranged is shorter than the distance from the rotation center of the wheel portion on which the second fastener is arranged.
The distance from the rotation center of the wheel portion where the first fastener is arranged in the drive chain sprocket wheel and the distance from the rotation center of the wheel portion where the second fastener is arranged in the driven chain sprocket wheel. Is the same as
The distance from the rotation center of the wheel portion where the second fastener is arranged in the drive chain sprocket wheel and the distance from the rotation center of the wheel portion where the first fastener is arranged in the driven chain sprocket wheel. Is the same as
A chain movable device, characterized in that the partial wheels of either the drive chain sprocket wheel or the driven chain sprocket wheel can be inverted from each other and attached to the other fixed plate.

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