JP7339487B2 - chain sprocket wheel - Google Patents

Description

TECHNICAL FIELD The present invention relates to a chain sprocket wheel for moving a chain stretched around its circumference in the length direction.

A chain sprocket wheel of a general chain mechanism is arranged in plural and a chain is stretched around the outer periphery, and at least one chain sprocket wheel is rotated by a driving device, and the rotational force is transmitted to the chain to extend in the length direction. It is designed to be moved.
Since the chain engages some of the teeth of the chain sprocket wheel, the teeth are subject to high loads and are prone to breakage and wear. In particular, in a chain conveyor for transporting heavy objects or in a chain mechanism of a sludge scraping device, the teeth are severely damaged, so the frequency of replacement of the chain sprocket wheel becomes high. At this time, replacing the entire large chain sprocket wheel not only required a great deal of manpower and work time, but also was 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 body and a fixed plate for mounting and fixing the wheel body, and in which the wheel body is formed in a replaceable split type.
If the teeth of such a split chain sprocket wheel become unusable due to partial loss of teeth or wear, the split pieces of the wheel body can be partially removed while the chain is suspended. It can be repaired by simply replacing it.

JP-A-2002-356217

However, in the chain sprocket wheel as described in Patent Document 1, the split pieces of the wheel body and the stationary plate are attached and fixed only with bolts and nuts. could rattle against the fixed plate, resulting in insufficient power transmission between the chain and the chain.
The problem to be solved by the present invention is to provide a chain sprocket wheel in which only a part of the partial wheel can be replaced without removing the chain, and the partial wheel is less likely to rattle with respect to the stationary platen. .

The invention according to claim 1 is a chain sprocket wheel for entraining a chain around the outer circumference, comprising a wheel portion having a large number of teeth with which the chain is engaged, and a stationary platen, wherein the wheel portion has a plurality of teeth in the circumferential direction. Each partial wheel is detachably attached to the stationary platen by a fastener, and a convex portion is formed along the entire outer peripheral edge of the stationary platen among the joint surfaces of the stationary platen and the partial wheel. and a chain sprocket wheel, wherein a concave portion is formed in the partial wheel, and the convex portion and the concave portion are engaged with each other.
In the invention according to claim 2, there are a plurality of fasteners for detachably attaching the partial wheel to the stationary platen, and the plurality of fasteners are composed of a first fastener and the first fastener. and a second fastener arranged rearward in the rotational direction of the partial wheel, wherein the distance from the center of rotation of the wheel portion where the first fastener is arranged and the wheel where the second fastener is arranged 2. The chain sprocket wheel according to claim 1, wherein the distance from the center of rotation of the portion is different.
According to a third aspect of the present invention, there is provided a chain sprocket wheel for entraining a chain on the outer circumference, comprising a wheel portion having a large number of teeth with which the chain is engaged, and a stationary platen, wherein the wheel portion has a plurality of teeth in the circumferential direction. Each partial wheel is detachably attached to the stationary platen by a fastener, and one of the joint surfaces of the stationary platen and the partial wheel is formed with a convex portion and the other is formed with a concave portion. a plurality of fasteners for detachably attaching the partial wheel to the stationary platen, the plurality of fasteners being a first fastener; a second fastener arranged behind the first fastener in the rotation direction of the partial wheel, the distance from the center of rotation of the wheel portion where the first fastener is arranged; The chain sprocket wheel is characterized in that the distance from the center of rotation of the wheel portion where the fastener is arranged is different.
In the invention according to claim 4, the chain sprocket wheel is a drive chain sprocket wheel, and the distance from the center of rotation of the wheel portion where the first fixing device is arranged is 4. The chain sprocket wheel according to claim 2 or 3, wherein the distance from the center of rotation of the wheel portion is longer than the distance from the center of rotation of the wheel portion.
In the invention according to claim 5, the chain sprocket wheel is a driven chain sprocket wheel, and the distance from the center of rotation of the wheel portion where the first fixing device is arranged is 4. The chain sprocket wheel according to claim 2 or 3, wherein the distance from the center of rotation of the wheel portion is shorter than the distance from the center of rotation of the wheel portion.
The invention according to claim 6 is the chain sprocket wheel according to any one of claims 1 to 5, characterized in that a gap is formed between the adjacent partial wheels. .
The invention according to claim 7 is the chain sprocket according to any one of claims 1 to 6, wherein the wheel portion is divided in the circumferential direction through the tooth troughs. Wheel.
Further, as another invention, the following may be used.
Means 1 is a chain sprocket wheel for entraining a chain around its outer periphery, comprising a wheel portion having a large number of teeth with which the chain engages, and a stationary platen, the wheel portion circumferentially extending over a plurality of partial wheels. Each partial wheel is detachably attached to the stationary platen by a fastener, and a convex portion is formed on one of the joint surfaces of the stationary platen and the partial wheel, and a concave portion is formed on the other, The chain sprocket wheel is characterized in that the convex portion and the concave portion are engaged with each other.

Means 2 has a plurality of fasteners for detachably attaching the partial wheel to the stationary platen, and the plurality of fasteners are a first fastener and the rotation of the partial wheel is greater than the first fastener. a distance from the center of rotation of the wheel portion at which the first fastener is arranged; and the center of rotation of the wheel portion at which the second fastener is arranged. A chain sprocket wheel according to claim 1, characterized in that the distances from are different.

Means 3 is that the chain sprocket wheel is a drive chain sprocket wheel, and the distance from the center of rotation of the wheel portion on which the first fastener is arranged is the distance from the wheel portion on which the second fastener is arranged. is longer than the distance from the center of rotation of the chain sprocket wheel according to means 2 .

Means 4 is that the chain sprocket wheel is a driven chain sprocket wheel, and the distance from the center of rotation of the wheel portion on which the first fastener is arranged is the distance from the wheel portion on which the second fastener is arranged. The chain sprocket wheel according to means 2, characterized in that the distance from the center of rotation of the

Means 5 is the chain sprocket wheel according to any one of Means 1 to 4, characterized in that a gap is formed between the adjacent partial wheels.

Means 6 is a chain sprocket wheel according to any one of means 1 to 5, characterized in that said wheel portion is divided circumferentially through said tooth roots.

According to the present invention, if any partial wheel 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. It is possible to greatly reduce the labor and cost required for replacement.
In addition, 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 stationary platen, the partial wheel is fixed even if a large force is applied to a part of the teeth. It is possible to prevent rattling with respect to the board.

In addition, a plurality of fasteners for detachably attaching the partial wheel to the stationary platen are at least a first fastener and a second fastener arranged behind the partial wheel in the rotational direction thereof, and the first fastener is By making the distance from the center of rotation of the wheel portion on which the second fixture is arranged different from the distance from the center of rotation of the wheel portion on which the second fixture is arranged, a large force is applied to the teeth in the moving direction of the chain. Also, it is possible to further prevent the partial wheel from rattling with respect to the stationary platen.

In addition, when the chain sprocket wheel is a drive chain sprocket wheel, the distance from the center of rotation of the wheel portion where the first fixture is arranged is set to the second fixture arranged behind the first fixture in the rotational direction of the wheel. By increasing the distance from the center of rotation of the wheel portion of the fastener, it is possible to increase the resistance to the rotational moment acting on the opposite side of the partial wheel from the chain caused by the rotation of the drive chain sprocket wheel.

In addition, when the chain sprocket wheel is a driven chain sprocket wheel, the distance from the center of rotation of the wheel portion where the first fixing device is arranged is set to the second fixing device which is arranged behind the first fixing device in the rotational direction of the wheel. By shortening the distance from the center of rotation of the wheel portion of the fixture, it is possible to increase the resistance against the rotational moment acting in the direction of rotation of the partial wheel from the chain caused by the movement of the chain.

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

In addition, by dividing the wheel portion in the circumferential direction through the troughs of the teeth, compared to the division between the peaks, the contact surface is reduced and attachment and detachment are facilitated.

1 is a front view of a chain sprocket wheel showing a first embodiment of the present invention; FIG. 1 is a cross-sectional view of a chain sprocket wheel showing a first embodiment of the present invention; FIG. 1 is a front view of a stationary platen according to a first embodiment of the present invention; FIG. 1 is a rear view of a partial wheel according to a first embodiment of the invention; FIG. The front view of the chain sprocket wheel showing the second embodiment of the present invention. The front view of the chain sprocket wheel showing the third embodiment of the present invention. The figure explaining the effect in 3rd Embodiment. The front view of the chain sprocket wheel showing the fourth embodiment of the present invention. The front view of the stationary platen which concerns on the 4th Embodiment of this invention. FIG. 11 is a rear view of a partial wheel according to a fifth embodiment of the invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, it cannot be overemphasized that this invention is not limited to embodiment.

[First Embodiment]
A first embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG.
FIG. 1 is a front view of the chain sprocket wheel showing the first embodiment, FIG. 2 is a cross-sectional view of the chain sprocket wheel showing the first embodiment, and FIG. 3 is a stationary platen according to the first embodiment. 4 is a front view of the partial wheel according to the first embodiment; FIG.

In the first embodiment, the chain sprocket wheel 1 is a drive chain sprocket wheel that allows a chain (not shown) stretched around its outer circumference to move 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 stationary platen 3 .
The wheel portion 2 has a large number of teeth 4 with which the chain engages on its outer circumference, and the teeth 4 are provided with peaks 41 and valleys 42 .

The wheel portion 2 is divided into a plurality of (eight in this embodiment) partial wheels 5 at equal intervals in the circumferential direction. The number of divisions may be set so that at least one partial wheel 5 that is not engaged with the chain exists even when the chain is stretched in a U-turn.
The wheel portion 2 is divided along a dividing line extending radially through the ridges 41 of the teeth 4 and is formed into a disk shape as a whole by combining all the partial wheels 5 in the circumferential direction. A small gap 7 is also formed between adjacent partial wheels 5 when all partial wheels 5 are combined.

The partial wheel 5 is independently detachably fixed to one surface of the stationary platen 3 by bolts 8 inserted through the bolt holes 9 (see FIG. 3) of the stationary platen 3 and the bolt holes 10 (see FIG. 4) of the partial wheel 5. be.
Two bolts 8 are provided for one partial wheel 5, a first bolt 8a and a second bolt arranged behind the first bolt 8a in the direction of rotation of the partial wheel 5. 8b. The bolt 8, the first bolt 8a, and the second bolt 8b correspond to the fastener, first fastener, and second fastener of the present invention, respectively.

The distance from the rotation center of the wheel portion 2 where the first bolt 8a is arranged differs from the distance from the rotation center of the wheel portion 2 where the second bolt 8b is arranged.
By arranging in this way, even if a large force is applied to the tooth 4 in the moving direction of the chain, the partial wheel 5 can be prevented from rattling with respect to the stationary platen 3 more effectively.

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. .
As a result, since it is a drive chain sprocket wheel, it is possible to increase the resistance 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, and to prevent rattling. can be done.

As shown in FIGS. 2 and 3, the stationary platen 3 includes a cylindrical portion 30 for passing a shaft (not shown) and a circular brim-shaped wheel fixing portion 31 for attaching the wheel portion 2 .
A fixing flange 32 is formed along the inner peripheral edge of one surface of the wheel fixing portion 31 (the surface to which the wheel portion 2 is joined), and the inner peripheral surface of the fixing flange 32 is welded to the outer peripheral surface of the cylindrical portion 30. is fixed by

As shown in FIGS. 2 and 3, on one surface of the wheel fixing portion 31, a circular protrusion 11 is formed along the entire outer peripheral edge, and as shown in FIG. Concave portions 12 that engage with the convex portions 11 of the stationary platen 3 are formed along the circumferential direction on the surface to be joined.
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 fixed platen 3 are positioned in the radial direction, and the protrusion 11 and the recess 12 can be easily engaged. The bolt holes 9, 10 are also easy to align.

Since the circular convex portion 11 is formed along the entire outer peripheral edge of the wheel fixing portion 31, the convex portion 11 can be easily processed.
When the chain sprocket wheel 1 is rotated to drive the chain, uneven forces are applied to the teeth 4 of the partial wheel 5, and the partial wheel 5 tries to rattle against the stationary platen 3, but extends in the circumferential direction. The convex portion 11 of the stationary platen 3 and the concave portion 12 of the partial wheel 5 are engaged to suppress rattling.

If any of the partial wheels 5 is worn or damaged, move the partial wheel 5 to a position where it does not engage with the chain without removing the chain from the chain sprocket wheel 1, and tighten the first bolt 8a and the second bolt 8b. The partial wheel 5 that has been pulled out, worn and damaged is removed and a new partial wheel 5 is installed.
A gap 7 is then formed between the partial wheels 5 which are arranged next to each other. Since the gap 7 is formed in this way, the partial wheel 5 can be easily removed without the adjacent partial wheel 5 competing with the removed partial wheel 5 and without being disturbed by the adjacent partial wheel 5.例文帳に追加In addition, the mounting work can be performed without being disturbed by the adjacent partial wheel 5. - 特許庁

[Second embodiment]
A second embodiment according to the present invention will be described below with reference to FIG. The description of the same parts as in the first embodiment will be omitted, and mainly the different parts will be described.

A chain sprocket wheel 1 in the second embodiment is a driven chain sprocket wheel, and rotates as a chain (not shown) stretched around the outer circumference moves.
Chain sprocket wheel 1 rotates in the direction of the arrow shown in FIG. 5 as the chain moves. Therefore, the partial wheel 5 is subjected to a rotational moment in the rotational direction of the partial wheel from the chain caused by the movement of the chain.

Correspondingly, the distance from the rotation center of the wheel portion 2 where the first bolt 8a is arranged is set to The bolt 8 is arranged so as to be shorter than the distance from the center of rotation. In this way, it is possible to increase the resistance against the torque acting on the part wheel 5 from the chain in the direction of rotation caused by the movement of the chain.

[Third embodiment]
A third embodiment according to the present invention will be described below with reference to FIGS. 6 and 7. FIG. The description of the same parts as in the first and second embodiments will be omitted, and mainly the different parts will be described.

In a third embodiment, the wheel portion 2 is divided into a plurality of partial wheels 5 along dividing lines extending radially through the valleys 42 of the teeth 4 .
When the wheel portion 2 is divided by the trough portions 42 of the teeth 4 in this way, the strength is slightly lower than when the wheel portion 2 is divided by the peak portions 41, and the partial wheels 5 are more likely to open. Since the portion that can come into contact with the partial wheels 5 arranged side by side is reduced, the partial wheels 5 arranged next to each other do not get in the way, and attachment and detachment are facilitated. In addition, compared to the one divided by the ridges 41, there are fewer parts that can come into contact with the adjacently arranged partial wheels 5 during attachment and detachment, so the possibility of fingers being caught is reduced and attachment and detachment work can be performed safely. be able to.

The attached eight 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. may occur. Even in such a case, if a plurality of partial wheels 5 are divided along a dividing line extending radially through the troughs 42 of the teeth 4, the influence of the existence of the steps on the movement of the chain is reduced. It can be made smaller and contributes to the smooth movement of the chain. This effect will be specifically described with reference to FIG.
7A and 7B are diagrams for explaining this effect, and FIG. 7A is an enlarged plan view of a portion obtained by dividing the wheel portion 2 by the crest portions 41 of the teeth 4 (a diagram viewed from the direction A in FIG. 5). ), and FIG. 7(b) shows a third embodiment, which is an enlarged plan view of a portion obtained by dividing the wheel portion 2 by the valley portions 42 of the teeth 4 (viewed from the direction B in FIG. 6). is.

Regarding the distance of the divided ridges 41 with respect to the level difference Z when the adjacent partial wheels 5, 5 are arranged with the gap 7 interposed therebetween, the distance between the divided ridges 41 with respect to the level difference Z is as shown in FIG. In the case of division by 41 , the distance between the divided peaks 41 is L 1 of the gap 7 . On the other hand, in the case where the tooth 4 is divided by the valley portion 42 as shown in FIG. In the case of division by 42, the distance over which the same level difference Z of the peak portion 41 occurs becomes longer.
For this reason, the influence of the steps of the ridges 41 on the chain is relatively small in the case divided by the troughs 42 in FIG. 7(b). Moreover, in the case of division by the ridges 41 in FIG. 7(a), a step Z occurs between the ridges 41 that engage with one hole of the chain, but division by the troughs 42 in FIG. 7(b) occurs. In this case, a step Z is generated between the ridges 41 that engage with the two holes of the chain, and the effect of the step on the chain is reduced.

[Fourth Embodiment]
A fourth embodiment according to the present invention will be described with reference to FIGS. 8 and 9. FIG. Note that the description of the same parts as any of the first to third embodiments will be omitted, and mainly the different parts will be described.

As shown in FIGS. 8 and 9, the outer shape of the fixed platen 3 is a regular polygon (regular octagon in this embodiment) having the same number of sides as the partial wheels 5, and along the outer peripheral edge of the fixed platen 3 A regular polygonal convex portion 11 is formed.
As shown in FIG. 8, the concave portion 12 provided on the joint surface of the partial wheel 5 is formed in a shape that is bent according to the shape of the convex portion 11 at each vertex of the regular octagon of the stationary platen 3. 5 are attached to the positions of the vertices of the regular octagon of the stationary platen 3 .
With this configuration, the protrusions 11 and the recesses 12 are provided so as to include a straight line parallel to the tangent line of a circle concentric with the fixed platen 3, so that the partial wheel 5 can move radially and circumferentially with respect to the fixed platen 3. , the partial wheel 5 can be more reliably prevented from rattling, and the bolt holes 9 and 10 can be more easily aligned.

[Fifth Embodiment]
A fifth embodiment according to the present invention will be described with reference to FIG. The description of the same parts as any of the first to fourth embodiments will be omitted, and mainly the different parts will be described.

5th Embodiment attaches the partial wheel 5 to the position of each side of a regular octagon to the stationary platen 3 of 4th Embodiment.
As shown in FIG. 10 , the surface of the partial wheel 5 that is joined to the stationary platen 3 is formed with a concave portion 12 that engages with the convex portion 11 of the stationary platen 3 . The concave portions 12 are provided in a straight line according to the shape of the convex portions 11 on each side of the regular octagon of the stationary platen 3 , and the partial wheels 6 are attached to the positions of the respective sides of the regular octagon of the stationary platen 3 . can be done.
With this configuration, the convex portion 11 and the concave portion 12 are provided so as to include a straight line parallel to the tangent line of a circle concentric with the stationary platen 3, so that the partial wheel 5 is positioned radially and circumferentially with respect to the stationary platen 3. Therefore, rattling of the partial wheel 5 can be more reliably suppressed, and the alignment of the bolt holes 9 and 10 is further facilitated.

[Other Modifications]
The present invention is not limited to the above embodiments. Examples include:

In this 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 engages, and the like.

In this embodiment, the fixed platen is formed with the convex portion and the partial wheel is formed with the concave portion, but of course, the fixed platen may be formed with the concave portion and the partial wheel may be formed with the convex portion.

In the present embodiment, the circular convex portion 11 is formed along the entire outer peripheral edge of the wheel fixing portion 31, but it is not limited to this. It may be intermittently provided instead of along the entire outer peripheral edge. Also, the protrusion 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 either. In this embodiment, it is provided so as to be curved in the circumferential direction or provided in a polygonal shape, but it may be provided so as to be long in the radial direction. In that case, it is needless to say that the engaging concave portion is also formed in a corresponding position shape.

In this embodiment, each partial wheel is attached to the stationary platen with two bolts, the first bolt and the second bolt, but it is not limited to this and may be attached to the stationary platen with one bolt.

In this embodiment, each partial wheel is attached to the stationary platen with two bolts, 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.

It is good also as an example by applying each technical matter in any embodiment to other embodiments.

REFERENCE SIGNS LIST 1 chain sprocket wheel 2 wheel portion 3 stationary platen 4 tooth 5 partial wheel 7 gap 8 bolt 8a first bolt 8b second bolt 9, 10 bolt hole 30 cylindrical portion 31 wheel fixing portion 32 fixing flange

Claims (7)

A chain sprocket wheel that spans a chain around its circumference,
a wheel portion having a number of teeth for engagement by the chain; and a stationary platen;
The wheel portion is circumferentially divided into a plurality of partial wheels, and each partial wheel is detachably attached to the stationary platen by a fastener,
Among joint surfaces of the fixed platen and the partial wheel, a convex portion is formed along the entire outer peripheral edge of the fixed platen , and a concave portion is formed in the partial wheel ,
A chain sprocket wheel, wherein the convex portion and the concave portion are engaged with each other. a plurality of fasteners for detachably attaching the partial wheels to the stationary platen,
The plurality of fasteners has a first fastener and a second fastener disposed behind the first fastener in the rotational direction of the partial wheel,
2. The distance from the center of rotation of the wheel portion where the first fastener is arranged is different from the distance from the center of rotation of the wheel portion where the second fastener is arranged. Chain sprocket wheel as described. A chain sprocket wheel that spans a chain around its circumference,
a wheel portion having a number of teeth for engagement by the chain; and a stationary platen;
The wheel portion is circumferentially divided into a plurality of partial wheels, and each partial wheel is detachably attached to the stationary platen by a fastener,
one of the joint surfaces of the stationary platen and the partial wheel is formed with a convex portion and the other is formed with a concave portion,
the protrusion and the recess are engaged,
a plurality of fasteners for detachably attaching the partial wheels to the stationary platen,
The plurality of fasteners has a first fastener and a second fastener disposed behind the first fastener in the rotational direction of the partial wheel,
The distance from the center of rotation of the wheel portion where the first fastener is arranged differs from the distance from the center of rotation of the wheel portion where the second fastener is arranged.
A chain sprocket wheel characterized by: The chain sprocket wheel is a drive chain sprocket wheel,
The distance from the center of rotation of the wheel portion where the first fastener is arranged is longer than the distance from the center of rotation of the wheel portion where the second fastener is arranged. Item 4. A chain sprocket wheel according to item 3 . The chain sprocket wheel is a driven chain sprocket wheel,
The distance from the center of rotation of the wheel portion where the first fastener is arranged is shorter than the distance from the center of rotation of the wheel portion where the second fastener is arranged. Item 4. A chain sprocket wheel according to item 3 . 6. A chain sprocket wheel according to any one of claims 1 to 5 , characterized in that a gap is formed between adjacent partial wheels. 7. A chain sprocket wheel according to any one of claims 1 to 6 , wherein the wheel portion is divided circumferentially through the tooth troughs.

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