JP4583962B2 - Protruded belt and method of manufacturing the same - Google Patents

Description

  The present invention relates to a belt with protrusions in which protrusions are integrally provided and a method for manufacturing the same.

The toothed belt 2 is formed by an inner peripheral side tooth portion 12 provided with a plurality of teeth 11 at predetermined intervals in the belt longitudinal direction, and an outer peripheral side back portion 14 in which a core wire 13 is embedded. Such a toothed belt 2 is driven to run by being suspended on a toothed pulley. When this belt 2 is used for transporting a card or paper, the card or paper is locked. Protruding bodies 4 for feeding are formed on the back surface of the belt 2 by molding with resin.

FIG. 10 shows an example of a belt with protrusions formed by resin-molding the protrusions 4 on the back surface of the belt 2. The belt 2 is formed by molding the teeth 12 and the back 14 with an elastomer such as polyurethane. The support protrusion 1 is integrally protruded from the back portion 14 of the belt 2. The protrusion 4 can be formed by setting the belt 2 produced by projecting the support protrusion 1 to the back surface in a molding die for injection molding and performing injection molding. The body 4 is outsert-molded with a pair of bifurcated joints 5 formed at its base sandwiching both sides of the support protrusion 1 in the belt longitudinal direction.

When the protrusion 4 is outsert-molded on the support protrusion 1 in this way and the support protrusion 1 is sandwiched by the joint 5 at the base, the protrusion 4 is provided on the back surface of the belt 2. If the adhesiveness of the resin is low as in the case where 2 is made of polyurethane and the protrusion 4 is made of polyacetal, the mounting strength of the protrusion 4 is extremely low. Therefore, a through hole 6 is provided in the support protrusion 1, and a pair of joints 5 at the base of the protrusion 4 are connected by a through connection part 7 formed by filling the through hole 6 with resin during outsert molding. Thus, the protrusion 4 is integrated with the support protrusion 1 so that the attachment strength of the protrusion 4 to the support protrusion 1 can be increased (see, for example, Patent Document 1).
JP 2001-341157 A

  As described above, by connecting the joint portion 5 of the base portion of the projection body 4 with the through connection portion 7 through the through hole 6 provided in the support projection portion 1, the projection body 4 is prevented from being detached from the support projection portion 1. However, when stress is applied to the protrusion 4 in the width direction of the belt 2, there is a problem that the protrusion 4 may fall in the belt width direction.

  FIG. 11 shows a result of observing a phenomenon in which the protrusion 4 falls when stress is applied to the protrusion 4 in the width direction of the belt 2. FIG. 11A shows an initial state before the stress is applied. is there. When the stress F acts on the protrusion 4 in the belt width direction as shown in FIG. 11B, the support protrusion 1 of the belt 2 formed of an elastic resin such as polyurethane is bent and deformed, and the support protrusion The protrusion 4 tilts as the part 1 bends, but the upper surface of the support protrusion 1 is in contact with the protrusion 4 at the initial stage of bending. However, if the stress continues to act on the protrusion 4, the support protrusion 1 starts to recover in the direction of arrow a as shown in FIG. 11C due to the elastic restoring force of the support protrusion 1. The upper surface of the support protrusion 1 slips as indicated by the arrow b in 11 (d). Further, as shown in FIG. 11 (e), the deformation of the through-hole 6 creates a gap between the through-connecting portion 7 and the inner periphery of the through-hole 6, and slip easily occurs. ), The support protrusion 1 is restored from the bent state to the original state while the protrusion 4 is tilted, and the protrusion 4 remains tilted and tilted even after the action of the stress F is released. Is. This phenomenon is more likely to occur when the cross-sectional shape of the through hole 6 is circular, since the support protrusion 1 is easily elastically restored with the through hole 6 as a rotation center.

  The present invention has been made in view of the above points, and it is an object of the present invention to provide a belt with a protrusion that can reliably prevent the protrusion from falling when stress is applied to the protrusion. is there.

  The present invention provides a protrusion provided on a support protrusion protruding from the back surface of the belt with the protrusions standing on the back surface of the belt in a state where both surfaces of the support protrusion are sandwiched between a pair of joints at the base of the protrusion. And a pair of joints connected by a through connecting portion filled in a through hole provided in the support protrusion, and at least a part of the upper surface or side surface of the protrusion, or at least one of the upper surface and the side surface. The part is provided with a groove, and the protrusion is prevented from rotating by filling the groove.

  According to a second aspect of the present invention, in the first aspect, the groove has a semicircular or polygonal cross section.

  According to a third aspect of the present invention, in the first or second aspect, the through hole provided in the support protrusion is elliptical.

  According to a fourth aspect of the present invention, the protrusion is erected on the back surface of the belt with the support protrusion projecting on the back surface of the belt being sandwiched between the pair of joints of the base portion of the protrusion. A method of manufacturing a belt with protrusions, wherein a support protrusion having a through hole and having a groove on the upper surface or a part of the side surface or at least a part of the upper surface and the side surface is integrally provided on the back surface of the belt. Forming the belt body, covering the support protrusions with molten thermoplastic resin so that the through holes and grooves of the support protrusions are filled, and solidifying the thermoplastic resin to form the protrusions. It is a feature.

  The invention of claim 5 is characterized in that, in claim 4, the method for producing a belt with protrusions, wherein the groove has a semicircular or polygonal cross section.

  According to a sixth aspect of the present invention, there is provided a method for manufacturing a belt with a protrusion according to the fourth or fifth aspect, wherein the through-hole provided in the support protrusion is elliptical.

  According to the present invention, the protrusion is raised on the back surface of the belt with the support protrusion protruding from the back surface of the belt sandwiched between the pair of joints at the base of the protrusion. A belt with a protrusion, which connects a pair of joints with a through-connecting portion filled in a through-hole provided in the support protrusion, and at least a part of the upper surface or side surface of the protrusion, or at least the upper surface and the side surface. A groove is provided in a part, and by filling the groove, it is a belt with a protrusion, which is a protrusion prevention part of the protrusion. Since the protrusions fill the grooves provided in at least a part of the upper surface or the side surface of the support portion or at least a part of the upper surface and the side surface, the rotation of the protrusion can be prevented.

Hereinafter, the best mode for carrying out the present invention will be described.
FIG. 1 shows an example of an embodiment of the present invention. A belt 2 includes an inner peripheral tooth portion 12 provided with a plurality of teeth 11 at predetermined intervals in the belt longitudinal direction (traveling direction of the belt 2). The tooth portion 12 and the back portion 14 are formed of an elastomer having elasticity such as polyurethane. Further, support protrusions 1 are integrally provided on the back portion 14 of the belt 2 at four locations along the belt longitudinal direction. The support protrusion 1 includes a hook support protrusion 1a in which one side of the both sides in the belt longitudinal direction is an inclined surface perpendicular to the back surface of the belt 2 and the other side is inclined, and both surfaces in the belt longitudinal direction. Is composed of two types of tower support protrusions 1b perpendicular to the back surface of the belt 2, and the hook support protrusions 1a and the tower support protrusions 1b are paired. The hook support protrusions 1a and the tower support protrusions 1b are respectively provided with through holes 6 penetrating so as to open on both sides in the belt longitudinal direction. Of course, the support protrusion 1 is not limited to such a form.

  The belt 2 formed as described above is set in a molding die 3 and injection molded, and the protrusion 4 is outsert-molded on the support protrusion 1 so that the protrusion 4 is erected on the back surface of the belt 2. It can be provided in the state. The protrusion 4 can be formed of a hard thermoplastic resin such as polyacetal. The protrusion 4 is outsert-molded such that a pair of bifurcated joints 5 at the base sandwich both surfaces of the support protrusion 1 in the belt longitudinal direction, and a part of the resin is supported during the molding. A through-connecting portion 7 that flows into the through-hole 6 of the projection 1 and is molded by resin flowing into the through-hole 6 is integrated with each of the pair of joint portions 5. Thus, the pair of joints 5 at the base of the protrusion 4 is outsert-molded so as to sandwich both surfaces of the support protrusion 1 in the longitudinal direction of the belt. The through-connecting portions 7 that flow into the through-holes 6 of the portion 1 and the resin flows into the through-holes 6 and are molded are respectively integrated with the pair of joint portions 5. Thus, since the pair of joints 5 at the base of the protrusion 4 are connected through the through-hole 6 of the support protrusion 1, the protrusion 4 is not detached from the support protrusion 1, and the support protrusion 1 is connected to the support protrusion 1. The attachment strength of the protrusions 4 can be obtained high (see FIG. 10 described above).

The belt body 2 is made of a polyurethane composition, and belt teeth 10, 10,... Are provided on the inner surface at a predetermined pitch. Further, along the bottom of each belt tooth 10, a core wire 3 made of one of aramid fiber, steel cord, polyester fiber, etc. as a tensile body is embedded in a spiral shape with a pitch formed in the belt width direction. Has been.

  The plate-like support protrusion 1 is a rectangle whose plate surface faces the belt running direction, and one through hole 6 having a circular outer shape is provided at the center. Further, a groove 7 is provided on at least a part of the upper surface or side surface of the plate-like support protrusion 1. The groove 7 may have a semicircular cross section, a trapezoidal shape, a triangular shape, a quadrangular shape, or a polygonal shape such as a pentagon or more. In order to prevent the protrusion 4 from rotating, It is more preferable that the shape is trapezoidal and the width becomes narrower toward the upper part of the groove 7. If the groove 7 is provided on at least a part of the upper surface or side surface of the plate-like support protrusion 1, the protrusion 4 can be prevented from rotating, but on the upper surface or side surface of the plate-like support protrusion 1. More preferably, the groove 7 is formed on the upper surface or the entire side surface along the longitudinal direction of the belt. Further, in order to reliably prevent the protrusion 4 from rotating, it is preferable that the groove 7 is provided on both the upper surface and the side surface of the support protrusion 1 and the groove 7 is filled with resin.

  Even though the through hole 6 formed in the support protrusion 1 has a circular cross-sectional shape, a groove is provided on at least a part of the upper surface or the side surface of the support protrusion, and the groove is formed into a protrusion. As the protrusion 4 is filled, the support protrusion 1 is not elastically restored around the through hole 6 while the protrusion 4 is tilted, and the effect of preventing the protrusion 4 from falling is lost. There is nothing.

  The protrusion 4 is a plate made of acetal resin (POM), and is provided with a pair of leg portions 4 a and 4 a that sandwich the plate-like support protrusion 1, and penetrates the plate-like support protrusion 1. A leg connecting portion 6b that fills the hole 6 and connects both the leg portions 4a and 4a is integrally provided. Further, a protrusion regulating portion 4c for restricting the protrusion of the conveyed product is provided at the upper end of the protrusion 4 so as to protrude in the belt length direction.

  That is, the protrusion 4 sandwiches the plate-like support protrusion 1 between the pair of leg portions 4a and 4a, and the leg connection portion 4b passes through the through hole 6 and is coupled to both the leg portions 4a and 4a. Furthermore, the leg crotch portion 8 of the protrusion 4 is fixed to the plate-like support protrusion 1 by filling the groove 7 with the leg crotch portion 8. Note that the bottom of the protrusion 4 is only in contact with the back surface of the belt, so that when the belt is wound around the pulley, the contact between the protrusion 4 and the back surface of the belt is released and the belt is properly moved along the pulley. It will be wrapped around.

  In another embodiment, the protrusion 4 sandwiches the plate-like support protrusion 1 between the pair of leg portions 4 a and 4 a, and the leg connection portion 4 b is formed on the side surface of the through-hole 5 and the support protrusion 1. It is fixed to the plate-like support protrusion 1 by filling the groove 9 and connecting it to both legs 4a and 4a.

  And this belt with a protrusion is used for pressing and horizontally transporting a conveyed object such as a paper sheet by a protrusion 4 provided on the back surface of the belt, or for supporting the conveyed object by the protrusion 4 and vertically conveying it. It is what is done.

  According to the belt with protrusions having the above-described configuration, the leg connecting portion 4b provided integrally with the protrusion 4 is filled in the through-hole 6 provided in the support protrusion 1, and further passes through the leg connecting portion 4b. Since the crotch portion 8 fills the groove 7, the projection body 4 does not fall off the plate-like support projection portion 1 unless the plate-like support projection portion 1 or the projection body 4 is damaged. The state of fixing to the support protrusion 1 is extremely strong.

Next, a method for manufacturing the belt will be described. The urethane prepolymer composition is poured into a casting mold having a cavity in which a toothed belt body having a plate-like support portion standing on the back surface of the belt is molded, and is cured by heating. As a result, a belt body corresponding to the cavity shape is formed. Note that the core wire is set in a tensioned state in advance in the casting mold before the composition is injected, and the core wire is embedded in the belt.

Next, a through hole having a circular or oval outer shape is provided at the center of the plate-like support protrusion.

  Only the plate-like support protrusion provided with a through hole in the injection mold for forming the protrusion is inserted and set at a predetermined position.

  A molten acetal resin (POM) is injected into the injection mold. At this time, molten resin is inflow-filled into the through-hole, and a protrusion is formed.

  Next, the protrusion attached to the belt is taken out from the injection mold.

  According to the above method for manufacturing a belt with protrusions, the plate-like support protrusions are covered with the protrusions formed of the thermoplastic resin, and the through-holes provided in the plate-like support protrusions have no protrusions. The groove provided on the upper surface of the plate-like support protrusion is filled with the leg crotch at the base of the both legs of the projection member. Moreover, the groove | channel provided in the side surface of a plate-shaped support protrusion is filled with the said leg part connection part.

Examples 1 and 2
FIG. 2 shows a belt according to the first embodiment. FIG. 3 shows a belt according to a second embodiment. The plate-like support protrusion 1 is a rectangle whose plate surface faces the belt running direction, and one through hole 6 having a circular outer shape is provided at the center. Further, a groove 7 is provided on at least a part of the upper surface of the plate-like support protrusion 1. The groove 7 may be semicircular or trapezoidal in cross section. However, in order to prevent the protrusion 4 from rotating, the groove 7 is trapezoidal so long as it is at the top of the groove 7. It is more preferable that the width becomes narrower. If the groove 7 is provided on at least a part of the upper surface of the plate-like support protrusion 1, the protrusion 4 can be prevented from rotating. It is more preferable that the groove 7 is engraved on the entire upper surface along.

Example 3
FIG. 4 shows a belt with a conveyance protrusion according to a third embodiment of the present invention. In addition, the same part as Example 1 is shown with the same code | symbol.

  In this belt with conveyance protrusions, the outer shape of the through hole 6 provided in the plate-like support protrusion 1 is an ellipse, and the protrusion is provided with a leg connecting part 4b that fills the through hole 6 and communicates therewith. Is provided.

  Other configurations are the same as those of the first embodiment. Moreover, the cross-sectional shape of the groove 7 provided on the upper surface of the plate-like support protrusion may be semicircular.

Examples 4 and 5
FIG. 5 shows a belt with a conveyance protrusion according to Example 4 of the present invention, and FIG. 6 shows a belt with a conveyance protrusion according to Example 5 of the present invention. In addition, the same part as Example 1 is shown with the same code | symbol.

  In this belt with conveyance protrusions, the outer shape of the through hole 6 provided in the plate-like support protrusion 1 is an ellipse, and the protrusion is provided with a leg connecting part 4b that fills the through hole 6 and communicates therewith. Is provided. A single groove 9 is provided on the side surface of the support protrusion 1. The cross-sectional shape of the groove 9 is semicircular in Example 4 and triangular in Example 5.

Examples 6 and 7
FIG. 7 shows a belt with a conveying projection according to a sixth embodiment of the present invention, and FIG. 8 shows a seventh embodiment of the present invention. In addition, the same part as Example 1 is shown with the same code | symbol.

  In this belt with a protrusion for conveyance, the outer shape of the through hole 6 provided in the plate-like support protrusion 1 is circular, and the protrusion is provided with a leg connecting portion 4b that fills and communicates with the through hole 6. It has been. Further, one groove 9 is provided on each side surface of the support protrusion 1. The cross-sectional shape of the groove 9 is semicircular in Example 6 and quadrangular in Example 7.

Example 7
FIG. 9 shows a belt with a conveying protrusion according to an eighth embodiment of the present invention. In addition, the same part as Example 1 is shown with the same code | symbol.

  In this belt with conveyance protrusions, the outer shape of the through hole 6 provided in the plate-like support protrusion 1 is an ellipse that is vertically long in the longitudinal direction of the protrusion, and the protrusion is filled with the through hole 6. A leg connecting portion 4b that communicates therewith is provided. Further, one groove 9 is provided on each side surface of the support protrusion 1. The cross-sectional shape of the groove 9 is a semicircular shape.

  In the first to seventh embodiments, the belt body 1 is a toothed belt body. However, the belt body 1 is not limited to this and may be a flat belt, a V belt, or the like.

In Examples 1 to 7, the belt body 2 is formed of thermosetting polyurethane. However, the belt body 2 is not limited to this, and may be formed of rubber.

In Examples 1 to 7, the protrusions 4 are made of acetal resin (POM). However, the invention is not limited to this, and the protrusions 4 are made of polyamide resin (PA), polycarbonate resin (PC), acrylonitrile- It may be made of butadiene-styrene resin (ABS) or the like.

BRIEF DESCRIPTION OF THE DRAWINGS It shows an example of embodiment of this invention, (a) is a whole front view, (b) is sectional drawing of a II line part, (c) is sectional drawing of a ROLL line part. . It is the (a) front view and (b) side view of the belt with a protrusion concerning Example 1. FIG. It is the (a) front view and (b) side view of the belt with a protrusion concerning Example 2 of the present invention. It is (a) front view and (b) side view of the belt with a protrusion concerning Example 3 of the present invention. It is (a) front view and (b) side view of the belt with a protrusion concerning Example 4 of the present invention. It is (a) front view and (b) side view of the belt with a protrusion concerning Example 5 of the present invention. It is the (a) front view and (b) side view of the belt with a protrusion concerning Example 6 of the present invention. It is (a) front view and (b) side view of the belt with a protrusion concerning Example 7 of the present invention. It is (a) front view and (b) side view of the belt with a protrusion concerning the example of the present invention. It is a partial sectional view of a conventional example. It is sectional drawing of the knee line | wire part of FIG. 10, (a) thru | or (f) show the phenomenon of the protrusion of a protrusion.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Support protrusion 2 Belt 4 Protrusion body 4a Leg part 4b Leg part connection part 4c Overflow restricting part 5 Joint part 6 Through-hole
7 groove 8 leg crotch 9 groove

Claims (6)

  This is a belt with protrusions that is provided with the protrusion protruding from the back of the belt with the support protrusion protruding from the back of the belt sandwiched between the pair of joints at the base of the protrusion. The pair of joints are connected by a through connecting portion filled in a through hole provided in the support protrusion, and at least a part of the upper surface or the side surface of the support protrusion, or at least a part of the upper surface and the side surface. A belt with a protrusion, characterized in that a groove is provided and the protrusion is prevented from rotating by filling the groove.   The belt with protrusions according to claim 1, wherein the groove has a semicircular or polygonal cross section.   The belt with protrusions according to claim 1 or 2, wherein the through-hole provided in the support protrusion is elliptical.   A method of manufacturing a belt with protrusions, wherein a protrusion is raised on a back surface of a belt in a state where both sides of the support protrusion are sandwiched between a pair of joints at a base portion of the protrusion on a support protrusion protruding from the back surface of the belt And forming a belt body having a through-hole, and a support protrusion having a groove on the upper surface or a part of the side surface, or a groove on at least a part of the upper surface and the side surface. Production of a belt with protrusions, wherein the support protrusions are covered with molten thermoplastic resin so that the through holes and grooves of the support protrusions are filled, and the protrusions are formed by solidifying the thermoplastic resin. Method.   The method for manufacturing a belt with protrusions according to claim 4, wherein the groove has a semicircular or polygonal cross section. The manufacturing method of the belt with a protrusion according to claim 4 or 5, wherein the through hole provided in the support protrusion is elliptical.

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