JPH0136815Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement of a cylindrical belt conveyor. A cylindrical belt conveyor is a conveyor that transforms an endless belt stretched between a head pulley and a tail pulley into a cylindrical shape for conveying transported goods.It is an innovative conveyor that can reduce spillage and scattering of transported goods. In recent years, it has been attracting attention as a conveyor. The cylindrical belt conveyor of the present invention can handle, for example, coal and pellets. It can be used to transport materials such as lime, alumina, grain, and salt.

[Prior Art] Conventional cylindrical belt conveyors are roughly divided into a type exclusively for joining hands (Japanese Unexamined Patent Publication No. 1981-81009) and a type exclusively for spiraling. As shown in FIG.
Belt 1 is provided with ears 102 inclined at a certain angle on the neck 105 at both ends of the belt 1.
00 is deformed into a cylindrical shape, the belt 100 is bent at the neck 105, and the ears 102 are brought into contact with a pair of ear guide rollers 104 to seal. On the other hand, the spiral-only type has a structure in which the belt 106 is rolled into a spiral shape by a circular guide roller 103, and both ends are overlapped and sealed, as shown in FIG. 7 showing the outbound side.

These cylindrical belt conveyors have the following advantages and disadvantages. In other words, in the case of a spiral-only type, rolling (swinging from side to side) is likely to occur when the conveyor runs around a curve, and especially when rolling occurs on the outbound side, the position of the overlapping part, which is the sealing part, may change. It has the disadvantage of moving downwards. When the overlapping portion moves downward in this manner, the transported object falls.

On the other hand, in the case of the type that is exclusively used for hands in prayer, since the ears 102 are restricted by the ear guide rollers 104 for hands in prayer, rolling does not occur on both the outward and return journeys, and therefore there is no risk of the transported object falling due to rolling. It has some advantages.

In addition, on the return trip side, the configuration shown in FIG. 6 and the configuration shown in FIG. 7 are upside down for both the type dedicated to palms and the type dedicated to spiral movement. For this reason, in the case of the type exclusively for praying in prayer, the ear portion 102 on the return side receives the weight of the belt 100, so abnormal wear is likely to occur in the ear portion 102 during driving. Therefore, as shown in FIG.
2 has to be made considerably thicker than the conveying section 101 of the belt.
It was not possible to use a flat belt whose wall thickness was approximately equal to that of 01. However, if the wall thickness of the ear portion 102 is increased,
When the belt is wound and reversed by the head pulley or tail pulley, a large strain is applied to the lug 102, which tends to damage the lug 102, which has the disadvantage of shortening the life of the belt.

On the other hand, in the case of the spiral-only type, a normal flat belt can be used as there is no problem of abnormal wear, and unlike the case of the gassho-only type, there is no force on the belt when it is turned around by the head pulley or tail pulley. It has the advantage that no force is applied and the life of the belt can be maintained for a long time.

[Problems to be solved by the invention] This invention was made to solve the above-mentioned problems, and the purpose of the invention is to make the outward journey a gassho type and the return journey a spiral type. It is an object of the present invention to provide a cylindrical belt conveyor that can prevent transported objects from falling from the belt and can also prevent abnormal wear of the ears on the return trip.

[Means for solving the problem] The present invention makes the thickness of the ear part almost equal to the thickness of the transport part, and makes the neck part smaller in elastic modulus in the transverse direction than the transport part and the ear part, so that the neck part is elastically deformed. By using an endless belt that is easy to bend, the belt can be shaped into a palm-lap shape, and the belt can be easily transformed into a spiral shape, and when the belt is shaped into a spiral shape, the ears do not get in the way. It is something.

That is, the cylindrical belt conveyor of the present invention includes a base, a head pulley and a tail pulley that are pivotally supported by the base, a conveying section that is stretched between the head pulley and the tail pulley, and corresponds to the central part in the transverse direction; Endless consisting of a neck connected to both sides of the conveying part and ear parts connected to both sides of the neck, the thickness of the ears is almost equal to the thickness of the conveying part, and the neck has the smallest modulus of elasticity in the transverse direction. The endless belt is held by the base and comes into contact with the surface of the endless belt extending from the tail pulley to the head pulley, and deforms the endless belt into a cross-sectional shape in which both ends are overlapped, and the center part is in a cylindrical shape. an outbound guide member that is held by the base and comes into contact with a surface of the endless belt extending from the head pulley to the tail pulley, and guides the endless belt by deforming it into a spiral shape in cross section. It is characterized in that it is composed of members.

Hereinafter, the cylindrical belt conveyor of the present invention will be further explained in terms of its constituent elements.

The base, which is a component of the present invention, is a member that holds the pulleys, outbound guide member, and return guide member of the cylindrical belt conveyor, and the framework used in conventional cylindrical belt conveyors can be used as is.

The head pulley and tail pulley, which are the constituent elements of the present invention, are rotating bodies rotatably supported on a base, and those used in conventional cylindrical belt conveyors can be used as they are. For example, it can be configured to be rotationally driven by a motor or the like. Note that the tail pulley is generally provided on the side that loads the transported items, and the head pulley is provided on the side that discharges the transported items.

An endless belt, which is one of the components that characterizes the present invention, is stretched between a head pulley and a tail pulley. The endless belt is composed of a conveyance section corresponding to the central portion in the transverse direction, a neck section connected to both sides of the conveyance section, and ear sections connected to both sides of the neck section. Here, the conveyance section is a section on which the object to be transported is placed and conveyed, and when the endless belt takes on a clasped palm shape or a spiral shape, it is deformed into a cylindrical shape. The neck is located on the outside of the conveyor in the transverse direction. This neck portion corresponds to the opening portion of the conveyance section that is bent into a cylindrical shape. The ears are portions that come into contact with each other when the conveyance section is deformed into a cylindrical shape, and close and seal the opening of the cylindrical conveyance section. In this endless belt, the thickness of the ear portion is approximately equal to the thickness of the conveying portion, and the elastic modulus in the transverse direction is the smallest at the neck portion. Therefore, the neck is the most elastically deformable of the endless belts. Examples of structures that can reduce the elastic modulus of the neck include increasing or decreasing the number of reinforcing layers embedded in the endless belt, or combining reinforcing layers with high rigidity and reinforcing layers with low rigidity and embedding them in the endless belt. can give. Note that, in order to maintain the integrity of the endless belt in the transverse direction, it is preferable that the reinforcing layer embedded in the conveyance section reaches the neck and ears. As the endless belt, a flat belt can be used in which the upper surface of the conveying part and the upper surface of the ear part are the same, and the lower surface of the conveying part and the lower surface of the ear part are the same.

The width of the neck and ears is determined by the overall size of the endless belt, the size of the object to be transported, etc.
The length of the conveyor section, which is generally cylindrical, in the transverse direction.
When it is 100, the appropriate width of the neck is about 0.5 to 10, and the appropriate width of the ears is about 2 to 10.

The outbound guide member, which is a component of the present invention, is a member that guides the endless belt by forming it in the shape of palms together, and comes into contact with and engages with the surface of the endless belt from the tail pulley to the head pulley. The outward path guide member may be one that has been used in a conventional cylindrical belt conveyor of the type exclusively used for clasped hands. For example, the outward guide member may include a main outward roller unit formed by a circular guide roller, a pair of ear guide rollers, and an end guide roller. Here, the circular guide roller refers to a roller that deforms and guides the conveying portion, which is the central portion of the endless belt, into a cylindrical cross section. The term "edge guide roller" refers to a roller that deforms and guides both end portions of the endless belt in the transverse direction into a clasped shape. The term "end guide roller" refers to a roller that guides the end of the endless belt in the transverse direction.

The return guide member, which is a component of the present invention, is a member that deforms and guides the endless belt into a spiral shape, and comes into contact with the surface of the endless belt from the head pulley to the tail pulley. As the return path guide member, those used in conventional cylindrical belt conveyors of the spiral-only type can be used.

[Operation] In the cylindrical belt conveyor configured as described above, when the head pulley and the like are rotated by a drive motor or the like, the endless belt is rotationally driven from the tail pulley to the head pulley. During rotational driving, the conveyor belt near the tail pulley and the head pulley is in the form of a flat belt as in the prior art.

The object to be transported is usually placed near the tail pulley, and the endless belt carrying the object moves toward the head pulley. During the movement, the endless belt gradually changes its shape to a clasped palms shape, similar to the conventional type dedicated to clasped hands, by the outgoing guide member. Therefore, the conveying section of the endless belt has a cylindrical shape, and the ears on both sides of the conveying section have a shape in which the palms are in contact with each other. At this time, since the neck has a small elastic modulus and is most likely to be elastically deformed, the ears easily come into contact with the palms together.

In the case of the outward journey as described above, the neck and ears of the endless belt are in close contact and sealed by the outward journey guide member, which prevents spillage and scattering of the transported items, similar to the conventional gassho-only type. I can do it.

When the transported object on the endless belt is conveyed near the destination, for example near the head pulley, the ear part of the endless belt is The neck gradually opens and the endless belt becomes a flat belt. Therefore, at the destination, the transported object is ejected from the endless belt by gravity or the like.

When the direction of the endless belt is changed by the head pulley, the endless belt moves on its return path. On the way to the tail pulley, the endless belt is deformed into a spiral shape by the return guide member, similar to the conventional spiral type. At this time, since the elastic modulus of the neck portion is set to be smaller than that of the conveying portion and the neck portion and is easily elastically deformed, the belt easily takes a spiral shape. Moreover, since the thickness of the ear part and the thickness of the conveying part are almost equal, the ear part does not get in the way like the conventional spiral type.

Furthermore, when the endless belt approaches the tail pulley, the endless belt gradually deforms into a flat belt shape due to the restoring force of the belt's elasticity. When the return path is completed in this manner, the direction of the endless belt is changed by the tail pulley and the endless belt moves to the outward path again, and the shape of the endless belt continues to change.

By the way, when the conveying portion of the endless belt is deformed into a nearly perfect cylindrical shape on the outward and return trips, the largest bending strain among the endless belts is applied to the neck portion. In this regard, in the present invention, the elastic modulus of the neck of the endless belt in the transverse direction is set to be the smallest, so that the neck can be easily bent and deformed, and thus the conveying section can be deformed into a shape close to a perfect circle on the outward and return trips. .

[Effects of the Invention] As described above, the cylindrical belt conveyor of the present invention uses an endless belt in which the thickness of the conveying part and the thickness of the ear part are substantially constant, and the elastic modulus of the neck part is the smallest. For this reason, on the outward journey, the endless belt can be made into a cylindrical shape that does not cause rolling and does not have to worry about the transported object falling, similar to the conventional type dedicated to palms in prayer. or,
On the return trip, the endless belt can be made into a spiral cylindrical shape that is free from abnormal wear of the ears, similar to the conventional spiral type belt. As a result, it is possible to solve the problem of falling and scattering of transported objects on the outward journey, which occurs with the spiral-only type, and also eliminates the problem of distortion of the ears, which occurs with the gassho-only type (Japanese Patent Application Laid-Open No. 57-81009). Solvable.

[Example] The drawings show an embodiment of the invention.

(Configuration of Example) The base 1 of this example includes a driving head pulley 11.
and a driven tail pulley 12 are respectively connected to the support shaft 1.
It is rotatably supported by 1a and 12a. An endless belt 2 is rotatably stretched between both pulleys 11 and 12. In order to apply tension to the belt 2, a snap pulley 13, bend pulleys 14 and 15, and a take-up pulley 1 are used.
An auxiliary pulley such as No. 6 is in contact with and engaged with the endless belt 2 on the return side.

FIG. 4 is a diagram schematically showing an endless belt. As shown in FIG. 4, this endless belt 2 includes a conveyance section 20 corresponding to the center of the endless belt 2 in the transverse direction (direction of arrow X in FIG. 4), and a neck section 21 connected to both sides of the conveyance section 20. Neck 21
and ears 22 connected to both sides.
The endless belt 20 has a flat belt shape with a thickness of about 20 mm in all parts, and as shown in FIG. It is buried. Note that the number of laminated reinforcing layers 23 is the smallest in the neck portion 21. Therefore, the elastic modulus of the belt 20 in the transverse direction is the smallest at the neck portion 21. Therefore, the neck portion 21 is more easily elastically deformed than the conveying portion 20 and the ear portions 22.

The outward path guide member 3 is a member held on the base 1 in order to make the endless belt 2 into a cylindrical shape with palms together. This outgoing path guide member 3 includes an outgoing path leading roller unit 30 shown in FIG. 2A, an outgoing path intermediate roller unit 40 shown in FIG. 2B, and an outgoing path main roller unit 50 shown in FIGS. It is.

Here, the outgoing advance roller unit 30 has rollers 31, 32, and 33, as shown in FIG. It is composed of. Note that the rollers 31 and 33 at both ends are arranged so as to be inclined upward as they go outward.

Also, the forward intermediate roller unit 40 is as follows. As shown in Figure 2B, rollers 41, 42, 43, 44, 4
5, 46, 47, each of these rollers 41
47 are arranged in a substantially U-shape with an opening at the upper end in the direction across the endless belt 2.

The outgoing main roller unit 50 includes a plurality of circular guide rollers 51 arranged in the circumferential direction in order to guide the endless belt 2 by deforming the center part into a cylindrical cross-section, as shown in FIGS. 2C and 2D. 52,5
3, 54, 55, 56, 57, and a pair of edge guide rollers 60, 61 that deform and guide both ends of the endless belt 2 in the transverse direction into a clasped palm shape.
It is formed by an end guide roller 63 that guides the end of the endless belt 2.

The return path guide member 7 is a member held on the base 1 in order to make the endless belt 2 into a spiral cylinder. The return guide member 7 includes a return main roller unit 80 shown in FIG. 3D, a return intermediate roller unit 90 shown in FIG. 3C, and a return lead roller unit 100 shown in FIG. 3B.

Here, the return main roller unit 80 includes rollers 81, 82, 83, 84,
85, 86, 87, and 88, and each of these rollers 81 to 87 is arranged in a circle in a direction across the endless belt 2.

Further, the return intermediate roller unit 90 includes rollers 91, 92, 93, 94,
95, 96, 97, each of these rollers 91
97 are arranged in a spiral shape in a direction across the endless belt 2.

The return advance roller unit 100 includes rollers 101, 102, 103, 1
04, and these rollers 101 to 104 are arranged in a substantially U-shape in the direction across the endless belt 2.

Here, from the tail pulley 12 to the head pulley 1
On the outbound trip toward No. 1, the arrangement of the roller units is the same as that of the conventional type shown in FIG. Further, on the return journey from the head pulley 11 to the tail pulley 12, the arrangement of the roller units is similar to that of the conventional spiral type shown in FIG.

That is, from the tail pulley 12 to the head pulley 11
On the outbound trip toward the destination, the outbound leading roller unit 30 and the outbound intermediate roller unit 40 are moved from the tail pulley 12 side, as shown by A, B, C, N... D, C, B, A from the tail pulley 12 side in FIG. , an outgoing main roller unit 50, .

In addition, on the return trip from the head pulley 11 to the tail pulley 12, from the head pulley 11 to the snap pulley 13, bend pulley 14, take-up pulley 16, etc. in FIG.
As shown in D, C, B, and A, the return path leading roller unit 100, the return path intermediate roller unit 90, and the return path main roller unit 80 are arranged in this order.
Further toward the tail pulley 12, the return main roller unit 80 and the return intermediate roller unit 9
0, return advance roller unit 100, and so on.

(Operation of the embodiment) Next, a change in the shape of the endless belt 2 when the cylindrical belt conveyor of this embodiment is driven will be explained.

First, from the tail pulley 12 to the head pulley 11
To explain on the outbound journey in the direction of arrow A,
At the position A in FIG. 1, the endless belt 2 assumes a substantially horizontal shape (a substantially upwardly curved shape) as shown in FIG. It is held at 32 and 33. 1st
At position B on the outward path in the figure, the conveying section 20 of the endless belt 2 has a plurality of rollers 41, 42, 43,
44, 45, 46, and 47, and thus the endless belt 2 is deformed into a substantially U-shape.
At position C on the outward path in FIG.
3, 54, 55, 56, 57, the endless belt 2 has a circular shape, and the ears 2
The ears 22 come into contact with their palms together by the ear guide rollers 60 and 61, and the ends of the ears 22 are regulated by the edge guide rollers 63, resulting in a perfect palm-joint shape. Furthermore, in the position D of FIG. 1, the endless belt 2 is in the same palm-clasped state as in the case C. In this way, the belt 2 moves for a predetermined distance L (as shown in FIG. 1) while keeping its palms together. When the endless belt 2 further moves along the direction of arrow A,
The endless belt 2 expands in the order of C, B, and A in FIG. It is discharged into a hopper (not shown) or the like.

In this way, the endless belt 2 reversed by the head pulley 11 reaches the return path. On the return trip in Figure 1,
After passing through the snap pulley 13, bend pulley 14, etc., proceed in the direction of arrow B, and proceed to A, B, H, N...
Go through d, c, b, and a in order. That is, in the return path A of FIG. 1, the endless belt 2 is substantially flat, although it is slightly curved downward as shown in FIG. 3A. When the endless belt 2 further advances in the direction of arrow B and reaches the position B on the return path in FIG.
2, 103, and 104, so that the endless belt 2 has a substantially U-shaped shape. (in this case,
The guide roller 101 is placed at a position to hold down the ear portion 22 as a step before winding the endless belt 2 into a spiral shape. ) When the endless belt 2 further advances and reaches the position C on the return path in FIG. 1, as shown in FIG.
2, 93, 94, 95, 96, and 97, it is transformed into a spiral cylinder. When the endless belt 2 further advances and reaches the position d in FIG. 1, the rollers 81, 82, 83, 84, 8
5, 86, 87, and 88, the cylindrical shape of the endless belt 2 becomes closer to a perfect circle, and the pair of ears 22 overlap each other as in the conventional spiral type. In this state, the belt 2
travels a predetermined distance L (as shown in FIG. 1). Furthermore, when the endless belt 2 moves toward the tail pulley 12,
The endless belt 2 expands in the order of D, C, B, and A in FIG. 3, and becomes a flat belt one after another. Then, the endless belt 2, which has become a flat belt, is reversed by the tail pulley 12 and moves in the direction of arrow A again.

(Effects of the Embodiment) As described above, when deforming the conveying section 20 of the endless belt 2 into a shape close to a perfect circle on the outward and return trips, the largest bending strain acts on the neck section 21. In this regard, in this example, the elastic modulus of the neck portion 21 of the endless belt 2 in the transverse direction is set to be the smallest, so that the neck portion 21 can be easily bent and deformed. Therefore, on the outward journey, the neck portion 21, which can be easily bent and deformed, makes it easy to bring the pair of ears 22 into contact with each other as shown by D in FIG. Therefore, in this example, the outward path can be made into a cylindrical shape with palms joined together, which does not cause rolling and does not cause the problem of the transported objects falling.

In addition, on the return trip, the neck part 2, which can be easily bent and deformed,
1 makes it easy to overlap the pair of ears 22 with each other as shown in FIG. 3D. Moreover, since the thickness of the ear portion 22 and the thickness of the conveying portion 20 are approximately equal, the ear portion 22 does not become an obstacle. Therefore, in this example, on the return trip, the ear portion 22 can be formed into a spiral cylindrical shape without the problem of abnormal wear.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention. Figure 1 is a simplified side view of the entire cylindrical belt conveyor, Figure 2
D is a schematic cross-sectional view at each position A to D on the outbound trip in FIG. 1, and FIG. FIG. 4 is a schematic cross-sectional view of the essential parts of the endless belt cut in the transverse direction. FIG. 5 is a sectional view at position D in FIG. 1. 6 and 7 are explanatory diagrams showing a conventional cylindrical belt conveyor. In the figure, 1 is the base, 2 is the endless belt, 20
21 is a neck part, 22 is an ear part, 3 is an outgoing path guide member, 30 is an outgoing path leading roller unit, 40 is an outgoing intermediate roller unit, 50 is an outgoing main roller unit, 51 to 57 are circular guide rollers, 60, 6
1 is a pair of ear guide rollers, 63 is an end guide roller, 80 is the main roller unit for the return trip, 90 is the intermediate roller unit for the return trip, and 1 is the leading roller unit for the return trip.
00 is shown respectively.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A base, a head pulley and a tail pulley that are pivotally supported by the base, a conveying part that is stretched between the head pulley and the tail pulley, and corresponds to the central part in the transverse direction; Endless consisting of a neck connected to both sides of the conveying part and ear parts connected to both sides of the neck, the thickness of the ears is almost equal to the thickness of the conveying part, and the neck has the smallest modulus of elasticity in the transverse direction. The endless belt is held by the base and comes into contact with the surface of the endless belt extending from the tail pulley to the head pulley, so that the endless belt has a cross-sectional shape in which both ends overlap and the center part has a cylindrical shape. an outbound guide member that is held by the base and comes into contact with a surface of the endless belt extending from the head pulley to the tail pulley, and guides the endless belt by deforming it into a spiral shape in cross section; A cylindrical belt conveyor characterized by comprising a return path guide member. (2) The outbound guide member includes a plurality of circular guide rollers that are arranged in the circumferential direction and guide the endless belt by deforming the center part into a cylindrical cross-section, and a plurality of circular guide rollers which deform the endless belt into a cylindrical shape in cross section, and a plurality of circular guide rollers which deform the endless belt into a cylindrical shape in cross section. A cylindrical belt according to claim 1, which includes an outgoing main roller unit formed by a pair of edge guide rollers that guide the endless belt, and an end guide roller that guides the end of the endless belt. conveyor. (3) The cylindrical belt according to claim 2, wherein the outward guide member includes an outward leading roller unit disposed in front of the outward main roller unit in a direction transverse to the endless belt and in a substantially horizontal direction. conveyor. (4) The outward guide member is approximately U-shaped with an opening at the upper end in the direction across the endless belt, and includes an outward intermediate roller unit disposed between the outward leading roller unit and the outward main roller unit. The cylindrical belt conveyor according to clause 3. (5) The cylindrical belt conveyor according to claim 1, wherein the return guide member includes a return main roller unit arranged in a circle in a direction transverse to the endless belt. (6) The cylindrical belt conveyor according to claim 5, wherein the return guide member includes a return intermediate roller unit disposed spirally in a direction across the endless belt in front of the return main roller unit. (7) The cylindrical belt according to claim 6, wherein the return path guide member includes a return path leading roller unit arranged in a substantially oval shape in a direction across the endless belt in front of the return path intermediate roller unit. conveyor.