JP4344705B2 - Conveying device and flat belt - Google Patents

Description

  The present invention relates to a conveyance device in which a protrusion for preventing a positional deviation of a conveyed product, that is, a slip on a belt conveyance surface, is provided on the conveyance surface.

2. Description of the Related Art Conventionally, OA equipment or the like is known that includes a transport device that uses an endless flat belt to transport paper sheets. When transporting relatively light transported items such as paper sheets, the friction coefficient of the transported surface that contacts the transported product must be controlled to prevent the transported product from being displaced on the transported surface of the belt. (Patent Document 1).
JP-A-6-183591

  The coefficient of friction changes due to various influences exerted between the conveyed object and the conveying surface, and has a very unstable element. In order to cope with this, it is conceivable to provide a protrusion for engaging the conveyed product on the conveying surface to prevent the positional deviation of the conveyed item.

  However, in the case of a flat belt provided with protrusions, at the end of the conveying device where the flat belt curves in a semicircular shape, there is a gap more than the height of the protrusion between the equipment adjacent to the conveying device, There is a risk that the transported object falls from the gap. In order to prevent this, it is possible to provide an actuator that displaces an adjacent device so that it does not interfere with the protrusion every time the protrusion comes to the end of the transport device. However, there is a problem that the configuration becomes complicated. .

  INDUSTRIAL APPLICABILITY The present invention is used in a transport device that can transport a transported object without causing a positional shift and can be disposed without substantially providing a gap between adjacent devices, and the transport device. The purpose is to provide a flat belt.

  The conveying device according to the present invention includes an endless flat belt, a first and second belt support mechanism in which a concave support portion is provided between two coaxial pulleys, and the flat belt is wound around. A plurality of protrusions formed at predetermined intervals along the longitudinal direction of the flat belt, provided at portions corresponding to the concave support portions on the belt conveyance surface, and the first and second belt support mechanisms The flat belt is formed with a certain length of deformed portion extending in the longitudinal direction of the flat belt on both sides of the protrusion, which is arranged at intervals so as to apply tension to the flat belt, and the protrusion passes through the concave support portion. In this case, the deformed portion is deformed by being pulled toward the shaft side of the pulley, and is recessed from the surface of the flat belt engaged with the pulley.

  The recessed support portion is, for example, a movable ring that is rotatably fitted to a shaft formed between two pulleys. The outer diameter of the movable ring may be the same as the outer diameter of the pulley. Further, the movable ring is preferably molded from a synthetic resin, and when it is not a synthetic resin, a bearing is preferably provided between the movable ring and the shaft.

  A plurality of protrusions may be formed at predetermined intervals along the longitudinal direction of the flat belt. In this case, the size of the interval between the protrusions is longer than, for example, half of the outer peripheral length of the pulley and longer than the length of the deformed portion.

  A plurality of rows formed of a plurality of protrusions arranged along the longitudinal direction of the flat belt may be provided on the transport surface.

  The length of the deformed portion is preferably longer than half of the outer peripheral length of the pulley, for example.

  The deformation part is, for example, a cut formed in a flat belt. The deformation portion may be made of a highly stretchable material that is thinner than the main body of the flat belt.

  The flat belt is attached to the first and second belt support mechanisms in a state where the flat belt is extended by 0.2 to 10% with respect to the length in the no-load state.

  The flat belt according to the present invention includes an endless belt main body formed of a stretchable material and protrusions formed on the conveying surface, and has a fixed length extending in the longitudinal direction of the belt main body on both sides of the protrusion. In the state where the deformed part is formed and tension is applied to the belt body, the protrusion is relatively recessed by pressing the opposite side of the deformed part with respect to the protrusion in the direction in which the conveying surface protrudes. It is characterized by.

  According to the present invention, it is possible to reliably convey a conveyed product without causing a positional shift, and it is possible to arrange a conveying device without providing a gap between adjacent devices.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a main part of a conveying apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a main part of a belt support mechanism.

  The belt body of the flat belt 10 is endless, and its layer structure is well known in the art. That is, the outer conveying surface 11 is a rubber layer, and the inner pulley surface 12 is a woven fabric layer made of synthetic fibers and the like, and is stretchable in the longitudinal direction. A plurality of protrusions 13 are formed on the transport surface 11 at a predetermined interval d along the longitudinal direction of the flat belt 10. In this embodiment, the number of rows of the plurality of protrusions 13 arranged along the longitudinal direction of the flat belt 10 is two.

  The protrusion 13 extends in the width direction of the flat belt 10, and the cross-sectional shape when cut along a plane along the length direction of the flat belt 10 is a triangle. Next to each protrusion 13 (in the width direction of the flat belt 10), protrusions 13 in other rows are formed. Therefore, the conveyed product (not shown) can be engaged with the four protrusions 13 and is held between these protrusions 13.

  On both sides of each protrusion 13, a deformed portion or notch 14 having a certain length e extending in the longitudinal direction of the flat belt 10 is formed. The cut 14 is formed by cutting the flat belt 10 in the thickness direction with a cutter, for example, and reaches the back surface of the flat belt 10, that is, the pulley surface 12.

  The flat belt 10 is wound around pulleys 21, 22, and 23 and movable rings (concave support portions) 24 and 25 of a belt support mechanism. The pulleys 21, 22, and 23 are engaged with the back surface of the flat portion 10a where the protrusion 14 of the flat belt 10 is not provided, and the movable rings 24 and 25 are engaged with the back surface of the protrusion arrangement portion 10b between the flat portions 10a. Match. The pulleys 21, 22, and 23 are fixed to the shaft 26, are coaxial, and have the same outer diameter. The movable rings 24 and 25 are loosely fitted to the shaft 26 and have substantially the same outer diameter as the pulleys 21, 22, and 23. That is, the inner diameters of the movable rings 24 and 25 are larger than that of the shaft 26. In FIG. 2, the movable rings 24 and 25 are shown shifted upward so that the pulleys 21, 22, and 23 are aligned with the upper end surface and the lower end surface. (The same state as FIG. 4).

  3 and 4 are cross-sectional views showing the belt support mechanism 20. FIG. 3 shows a state where the flat belt 10 is not attached. FIG. 4 shows a state when the flat belt 10 is attached, but the flat belt 10 is omitted. Further, the flat belt 10 is wound around the first and second belt support mechanisms, but only the first belt support mechanism 20 is illustrated, and the second support mechanism is omitted because it has the same configuration.

  The support plates 31 and 32 of the belt support mechanism 20 are fixed to the edge of the pedestal 33. Ball bearings 34 and 35 are fitted into openings formed in the support plates 31 and 32. The shaft 26 has a small-diameter portion 26a, a medium-diameter portion 26b, and a large-diameter portion 26c. The shaft 26 is rotatably supported by ball bearings 31 and 32 at small-diameter portions 26a formed at both ends. The pulleys 21 and 23 are fitted to the medium diameter part 26b, and the pulley 22 is fitted to the large diameter part 26c. The movable ring 24 is fitted to the large diameter portion 26 c and is sandwiched between the pulleys 21 and 22. The movable ring 25 is fitted into the large diameter portion 26 c and is sandwiched between the pulleys 22 and 23.

  The movable rings 24 and 25 are cylindrical collars and are molded from synthetic resin. The pulleys 21, 22, and 23 have a substantially cylindrical shape, but the outer peripheral surface has a crown shape. That is, on the outer peripheral surfaces of the pulleys 21, 22, and 23, the diameter increases as it approaches the central portion in the axial direction.

  The plate | board thickness of the movable rings 24 and 25 is thinner than the pulley 22, Therefore, in the state in which the flat belt 10 is not attached, as shown in FIG. 3, the upper surface of the movable rings 24 and 25 and the upper surface of the pulleys 21, 22, and 23 There is a step between them. On the other hand, in the state where the flat belt 10 is attached, as shown in FIG. 4, there is substantially no step between the upper surfaces of the movable rings 24 and 25 and the upper surfaces of the pulleys 21, 22, and 23. The outer peripheral surfaces of the movable rings 24 and 25 substantially coincide with the largest diameter portions of the pulleys 21, 22 and 23.

  Please refer to FIG. 1 and FIG. The length of the protrusion 13 along the width direction of the flat belt 10 is substantially equal to the length of the movable rings 24 and 25 in the axial direction. The notch 14 extends perpendicularly to the protrusion 13 on both sides of the protrusion 13, and the protrusion 13 is positioned substantially at the center of the notch 14. The length e of the cut 14 is at least half of the outer peripheral length of the pulleys 21, 22, and 23 (that is, the length in the circumferential direction). On the other hand, the distance d between the protrusions 13 is not less than half the outer peripheral length of the pulleys 21, 22, and 23 and is longer than the length e of the notches 14. Accordingly, with respect to two adjacent protrusions 13 in the same row, the end portion 14a of the cut 14 is separated by the difference between the distance d and the length e.

  The first and second belt support mechanisms 20 to which the flat belt 10 is attached are arranged at intervals so as to apply tension to the flat belt 10. That is, the flat belt 10 is attached to the first and second belt support mechanisms 10 in a state where the flat belt 10 is extended by 0.2 to 10% with respect to the length in the no-load state. In the mounted state, the flat portion 10a is relatively strongly stretched by the pulleys 21, 22, and 23, whereas the protrusion placement portion 10b is relatively loosely stretched by the displacement of the movable rings 24 and 25. Therefore, when the projection 13 passes through the movable rings 24 and 25, the notch 14 is released by being pulled toward the shaft 26 or the shafts 21, 22, 23, thereby engaging the pulleys 21, 22, 23. It is recessed more than the flat part 10a to join.

Next, the operation of this embodiment will be described with reference to FIG.
In the first state (A), the protrusion 13 and the notch 14 do not reach the movable ring 24. Therefore, the outermost end of the flat belt 10 does not press the movable ring 24 in the horizontal direction or presses it with a relatively small pressing force. When the protrusion 13 and the notch 14 are close to the portion of the movable ring 24 and are in the second state (B) or the third state (C), the portion in front of the protrusion 13 of the notch 14 is opened, and the protrusion arrangement portion Part of 10 b is recessed toward the movable ring 24.

  Further, when the flat belt 10 is rotated and the protrusion 13 comes to the outermost end and enters the fourth state (D), the portion of the notch 14 of the protrusion disposition portion 10b comes into close contact with the outer peripheral surface of the movable ring 24, and the protrusion 13 is recessed more than the flat part 10a. In this state, the tip of the protrusion 13 is inside the surface of the flat portion 10a. That is, the step between the upper surfaces of the movable rings 24 and 25 and the upper surfaces of the pulleys 21, 22, and 23 shown in FIG.

  In the first state (A) of the illustrated example, the protrusion arrangement portion 10a of the flat belt 10 is not in contact with the movable ring 24 at the outermost end portion and is curved with the same curvature as the flat portion 10a. Depending on the material of the flat belt 10 or the tension applied by the flat belt 10, the movable ring 24 is pressed and displaced in the horizontal direction, and is recessed from the flat portion 10a.

  As described above, in this embodiment, the flat belt 10 is a portion on the opposite side of the protrusion 13 with the notch 14 in a state where tension is applied to the belt body, that is, in a state where the flat belt 10 is attached to the first and second support mechanisms. That is, the flat portion 10a is pressed in the direction in which the transport surface 11 protrudes, so that the cut 14 is opened and the protrusion 13 is relatively recessed. That is, in the first and second support mechanisms 20, the flat portion 10a of the flat belt 10 is pressed by the pulleys 21, 22, and 23, and the protrusion 13 is recessed from the flat portion 10a.

  Therefore, the conveyed product is reliably conveyed without causing a positional deviation by engaging with the protrusion 13, and a gap is not substantially formed between the devices adjacent to the conveying device. The transported object can be reliably delivered without providing a special mechanism.

  In the said embodiment, the outer peripheral surface of the pulleys 21, 22, and 23 is shape | molded by the crown shape. Therefore, the running direction of the flat belt 10 is prevented from being shifted with respect to the pulleys 21, 22, and 23, and it is not necessary to provide guide members that engage with both edges of the flat belt 10.

  The movable rings 24 and 25 may be made of metal. In this case, in order to suppress friction with the shaft 26 as much as possible, it is preferable to provide a bearing such as a ball bearing between the shaft 26.

  Further, in order to prevent stress concentration at the end portion 14 a of the cut 14, a hole having a diameter larger than the width of the cut 14 may be formed in the end portion 14 a.

  Further, the cut 14, that is, the deformed portion does not necessarily have to penetrate the flat belt 10 in the thickness direction, and may be formed only on the conveying surface 11 side of the flat belt 10. Moreover, it can replace with the notch | incision 14, and it can also comprise this part with a highly elastic material thinner than a belt main body, and when a belt main body is formed with a highly elastic material, it is not necessary to make a deformation | transformation part thin.

  Further, the movable rings 24 and 25 can be omitted when a laterally rigid core is used as the core of the flat belt 10. In this case, the shaft 26 is a concave support portion provided between two pulleys.

  Although two rows of protrusions 13 are provided in the above embodiment, the number thereof can be changed according to the purpose. Moreover, the cross-sectional shape of the protrusion 13 is not limited to a triangle, and can be appropriately selected according to the purpose.

It is a perspective view which shows the principal part of the conveying apparatus which is one Embodiment of this invention. It is a perspective view which shows the principal part of a belt support mechanism. It is sectional drawing which shows a belt support mechanism and the state which cannot attach a flat belt. It is sectional drawing which shows a belt support mechanism and a state when a flat belt is attached. It is a figure which shows the effect | action of a conveying apparatus.

Explanation of symbols

10 Flat belt 11 Conveying surface 13 Protrusion 14 Cutting (deformation part)
20 Belt support mechanism 21, 22, 23 Pulley 24, 25 Movable ring (concave support)
26 Shaft

Claims (10)

An endless flat belt,
A first and second belt support mechanism provided with a concave support portion between two coaxial pulleys, on which the flat belt is wound;
A protrusion provided at a portion corresponding to the recessed support portion on the conveying surface of the flat belt,
The concave support portion is a movable ring that is rotatably fitted to a shaft formed between the two pulleys and has an inner diameter larger than an outer diameter of the shaft;
The first and second belt support mechanisms are arranged at intervals so as to apply tension to the flat belt, and the flat belt is provided with the protrusion and is provided with a protrusion arrangement portion that engages with the recess support portion; The projection is not provided and has a flat portion that engages with the pulley, and a cut portion having a fixed length extending in the longitudinal direction of the flat belt or a deformable portion made of a highly stretchable material is formed on both sides of the projection. When the projection passes through the recessed support portion, the deformed portion is deformed by pressing the flat portion against the pulley, and the protrusion is recessed from the flat portion. Conveying device to do. The conveying device according to claim 1 , wherein an outer diameter of the movable ring is the same as an outer diameter of the pulley. The conveyance device according to claim 1 , wherein a bearing is provided between the movable ring and the shaft.   The conveying device according to claim 1, wherein a plurality of the protrusions are formed at predetermined intervals along the longitudinal direction of the flat belt. The conveying apparatus according to claim 4 , wherein the interval between the plurality of protrusions is longer than half of the outer peripheral length of the pulley. The transport apparatus according to claim 4 , wherein an interval between the protrusions is longer than a length of the deforming portion. The transport apparatus according to claim 4 , wherein a plurality of rows made of the plurality of protrusions arranged along the longitudinal direction of the flat belt are provided on the transport surface.   The conveying device according to claim 1, wherein the length of the deforming portion is longer than half of the outer peripheral length of the pulley.   The flat belt is attached to the first and second belt support mechanisms in a state where the flat belt is extended by 0.2 to 10% with respect to a length in an unloaded state. Transport device. An endless belt body formed of a stretchable material;
A protrusion formed on the conveying surface,
The belt main body has the protrusions, the protrusion arrangement portions extending in the longitudinal direction of the belt main body, and the flat portions provided on both sides of the protrusion arrangement portion and extending in the longitudinal direction of the belt main body,
On both sides of the protrusion, a fixed length cut or a deformable portion made of a highly stretchable material extending in the longitudinal direction of the belt body is formed, and in a state where tension is applied to the belt body, the flat portion is A flat belt, wherein the protrusion is relatively recessed by being pressed in a direction in which tension is applied.

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