JPH0731719U - Wide Toothed Belt for Transport - Google Patents

Abstract

(57) [Summary] [Purpose] Even for small items, the shape, size,
The weight is diversified, and the belt for conveying these articles is required to have a wide conveyer belt in comparison with the length thereof, which meets the requirements of this era and is easy to manufacture and the belt itself meanders. The purpose is to provide a thin belt with wide teeth for conveyance that is less tough and has high toughness. [Structure] A wide canvas is used as the tensile body (2),
On the back surface of the tensile body (2), there is provided a thermoplastic resin band tooth-shaped member (5) in which a group of tooth-shaped tooth portions (3) extending in the width direction of the tensile body are integrally connected by a thin bridge (4). A structure in which a wide toothed belt (1) attached is basically used, and if necessary, another canvas tension member is laminated on the surface of a canvas tension member located on the belt surface via an elastic layer made of resin. Consists of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a wide-width toothed belt for conveyance, and more specifically, it is characterized by a belt body having an extremely wide width in comparison with the circumferential length of the belt, and a belt-shaped tooth group extending on the back side of the belt in the belt width direction. The present invention relates to a relatively thin belt with wide teeth for transporting small articles, which is effective for equalizing the belt tension in various places of the belt and suppressing the meandering running of the belt.

[0002]

[Prior art]

 Conventionally, a toothed belt (11) that synchronously conveys small articles has a cord tension member (13) made of steel cord or aramid fiber cord as shown in FIG. 8 and a pair of upper and lower elastic body layers (14). ) (15) to form a belt main body (12), and belt-shaped tooth portions (16) extending in the belt width direction that mesh with the toothed pulley are arranged on the back surface of the belt main body (12) at a constant pitch. There is one with a built structure. The endless work of this belt is generally carried out by nesting the cord tension members (13) exposed at both ends of the belt and embedding the cord combination portion in the elastic layer.

In recent years, along with the diversification and size increase of conveyed goods and the increase in conveying amount, the field of use of toothed belts has expanded, and further widening of belts has been required. Parallel embedding work for accuracy in the width direction involves many difficulties, and the number of embedding cords in the belt is naturally limited. As one of the countermeasures for this, as shown in FIG. 9, by multiplying a plurality of toothed belts (11) between a pair of long toothed pulleys (P 1) (P), , To meet the demand for wide belts.

[0004]

[Problems to be solved by the device]

 When joining both ends by heat fusion for endless toothed belts using cord tension bodies, the cord tension bodies tend to be disturbed at the joints, and the tension of each cord tension body Due to the non-uniformity, meandering was likely to occur when the belt was running, and it could be a major cause of belt damage. In addition, in the case of multiple belts shown in Fig. 9 intended to widen the belts, due to uneven belt tension between the belts, abnormal tension partially acts on each belt. , It was a cause of early damage to the belt.

Further, when the conveyed product is unevenly placed on a part of the toothed belt, a tension imbalance occurs between the place where the conveyed product is placed and the place where the conveyed product is not placed, and the belt meanders. Driving will occur. For this reason as well, it is required that the conveyed product be placed uniformly over the entire width of the belt, which appears as a major bottleneck in terms of work efficiency. Moreover, in the worst case, when the conveyed object was caught between the belt and the pulley, many problems such as penetration damage and vertical tear damage occurred on the belt.

This invention uses a wide canvas as a tensile member of a wide belt, and can greatly remedy the above-mentioned problems inherent in a toothed belt using a parallel cord group as a tensile member. It is intended to provide a toothed belt.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the wide toothed belt for conveyance in which the present invention is implemented adopts a structure like a hook. That is, in the wide belt for conveying according to the present invention, the tensile body is composed of a wide canvas, and the rear surface of the tensile body extends in the width direction of the tensile body and has a predetermined pitch. It is characterized in that a strip-shaped thermoplastic tooth-shaped member, in which strip-shaped tooth groups arranged in a row are connected by a thin bridge, is attached.

This invention further uses the above-mentioned wide toothed belt as a base member, and attaches a laminate having an elastic layer made of a thermoplastic resin attached to the back surface of a wide canvas tension member on the front surface side thereof. The characteristic feature is a wide toothed belt that has two canvas tension members via an elastic layer.

Further, a laminate composed of the wide canvas tension body and the elastic body layer is attached to the surface of the wide belt for carrying toothed belt having the two canvas tension bodies, and two layers of elasticity are attached. The characteristic is a wide toothed belt having three canvas tension members through the body layers.

In the belt with wide teeth for conveyance having each of the above-mentioned configurations, in the case where the canvas tension member is exposed on the belt surface side, the exposed fabric tension member is subjected to a Dip treatment in which RFL liquid is applied. Or the surface of the canvas tension member located at the outermost surface is covered with a thermoplastic resin cover.

[0011]

【Example】

 Next, a specific embodiment of the wide belt for carrying a tooth according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a part of a wide belt for carrying a tooth according to the present invention, and FIG. 2 is an enlarged end view of a part of FIG. The conveyor wide belt (1) forms a tensile body (2a) with a single piece of wide canvas, and the rear surface of the tensile body (2a) is arranged in the width direction of the tensile body (2a). The extending strip-shaped tooth portions (3) are arranged at a predetermined pitch, and the strip-shaped tooth portion (3) group includes a thermoplastic resin strip-shaped tooth-shaped member (5) integrally connected by a thin bridge (4). It consists of affixed components.

FIG. 3 is a view corresponding to FIG. 2 showing another embodiment, and a canvas tension member (2a) exposed on the surface of the wide toothed belt having the basic shape shown in FIGS. 1 and 2. ) Is covered with an elastic cover (7a) made of a thermoplastic resin.

FIG. 4 is also a view corresponding to FIG. 2 showing another embodiment of the canvas tension member exposed type. FIG. 4 is a canvas forming a wide toothed belt having the basic shape shown in FIGS. 1 and 2. On the front surface side of the tensile body (2a), a laminated body in which the elastic layer (6b) made of a thermoplastic resin is pasted on the back surface of the second canvas tensile body (2b) is integrally attached.

FIG. 5 is a view corresponding to FIG. 3 showing another embodiment of the elastic cover covering type, and the second canvas tension member (2b) exposed on the surface of the wide toothed belt shown in FIG. Is covered with an elastic cover (7b) made of a thermoplastic resin.

FIG. 6 is a view corresponding to FIG. 2 showing another embodiment of the canvas tension member exposed type, and the surface of the second canvas tension member (2b) of the wide toothed belt shown in FIG. On the side, a laminated body in which an elastic layer (6c) made of a thermoplastic resin is attached to the back surface of the third canvas tension member (2c) is attached and integrated.

FIG. 7 is a view corresponding to FIG. 3 showing another embodiment of the elastic cover-covering type, and the third canvas tension member (2c) exposed on the surface of the wide toothed belt shown in FIG. Is covered with a thermoplastic resin elastic cover (7c).

Each of the canvas tension members exposed on the surface of the wide toothed belt shown in FIGS. 1, 2, 4 and 6, and the surface of the wide toothed belt shown in FIGS. 3, 5 and 7. A profile is attached to the surface of each elastic cover layer as required.

The endless work of the belt according to the present invention is carried out by connecting the canvas tension members (2) exposed at both ends of the belt by using a lightning method or a butt method, and connecting the connecting portions with a thermoplastic material. It is embedded in a resin elastic body.

As described above, the canvas tension member forming each wide toothed belt according to the present invention uses a plain weave, a twill weave, or a satin weave, using a multifilament yarn or a monofilament yarn made of polyester, aromatic polyamide, or glass fiber. It is woven by weaving. As the woven yarn for this folding, a warp yarn of 500 to 1500 denier (d) and a weft yarn of 300 to 1500 denier (d) are used, and the width of the canvas is appropriately selected from a wide range of 200 to 600 mm. To be done.

Further, each member of the resin tooth profile member, the elastic material layer and the elastic cover constituting the wide toothed belt is composed of a thermoplastic resin such as polyurethane or polyvinyl chloride resin, The elastic layer constituting a part thereof is set to have a thickness of 0.3 mm, and the elastic cover is set to 0.1 to 1.0 mm.

Each constituent member forming the wide toothed belt is firmly bonded with a urethane adhesive, and the creep elongation under the maximum tension when the wide toothed belt is used is set to 0.5% or less. The hardness of the band-shaped teeth is JIS. A, the friction coefficient at the time of meshing between the metal toothed pulley and the wide toothed belt is set to 85 to 95 °, and the friction coefficient is 0. It is set in the range of 15 to 0.30. Further, in the wide toothed belt, when the canvas tension body is entirely exposed on the belt surface side as shown in FIGS. 1, 2, 4 and 6, the canvas tension surface is exposed to the RFL liquid. Dip processing has been performed.

Next, the running conditions of the belts in the running test of the conventional wide toothed belt using the cord tension member and the wide toothed belt using the wide canvas tension member according to the present invention are comparatively examined. First, in a wide toothed belt using a conventional cord tensile body, a cord made of an aromatic polyamide fiber of 1,000 denier was embedded in a polyurethane elastic layer at a cord pitch of 2.5 mm. The distance from the center of the cord tension member to the root portion of the cord, which is composed of a belt main body and a toothed member made of polyurethane provided on the back surface of the belt main body. L. D. It is a T10 type belt with a value set to 1.00 mm. On the other hand, a wide toothed belt using a wide canvas tension member has a two-layer weaving with polyester fiber yarn of 1000 denier warp and 600 denier weft. On the belt main body with the polyurethane elastic body layer interposed between them, the polyurethane tooth profile member is provided on the back side of the belt, and the distance from the center to the root of the two layers of canvas tension body, P, ． L. It is a T10 type belt with a D value set to 1.00 mm.

For both T10 type, both belts having a belt width of 350 mm are mounted between a pulley having 14 teeth and a pulley having driven teeth, and the belt is kept at room temperature and under no load. A running test was performed under running conditions of a speed of 60 m / min. As a result, in the conventional wide toothed belt using the cord tension body, the belt meandered by bending and running 160,000 times, the belt climbed onto the pulley flange and the belt was cut. On the other hand, the wide toothed belt using the canvas tension body according to the present invention could withstand severe running more than 2 million times. As described above, it was confirmed that the canvas stretchable wide toothed belt according to the present invention has 10 times or more durability of the cord stretchable wide toothed belt.

[0024]

[Effect of device]

 The wide toothed belt for conveyance according to the present invention is made of a wide canvas as a tensile member, so that the belt is sufficiently wide, but its manufacture is easy, and the rigidity in the belt width direction is further increased. In particular, by stacking a plurality of canvas tension members, the rigidity in the belt width direction is further enhanced, and the same effect of suppressing elongation in the belt longitudinal direction as that of the cord tension member can be expected.

Further, even when a bite phenomenon occurs between the belt and the pulley of the conveyed product, it is possible to prevent the belt from piercing or vertically tearing evenly at various places.

In addition, when the both ends of the belt are joined by heat fusion for endlessness of the wide toothed belt, there is no disturbance of the tension body like the cord tension body, and each canvas tension body is a belt. Since the canvas tension members can be joined on substantially the same horizontal plane, it is possible to secure a substantially uniform strength in each part of the belt including the joint part of the belt.Belt meandering running caused by the existence of locally weakened parts of the belt, etc. Can be reliably prevented.

Further, by ensuring the homogeneity and strength of each part of the belt, it is possible to sufficiently cope with the change in size and weight of the conveyed product, and it is no longer subject to great restrictions for each conveyed product.

Further, by exposing the entire surface of the canvas tension member to the belt surface and subjecting the surface to a dip (Dip) treatment, it is possible to ensure durability and prevent the conveyed product itself from slipping easily on the belt surface. (Sliding use) It is also possible to find that the conveyed product does not easily stick on the belt (unattached use). Further, by covering the belt surface with an elastic cover layer, the abrasion resistance and durability of the belt can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a portion of a conveyor wide toothed belt according to the present invention.

FIG. 2 is an enlarged end view of a portion of FIG.

FIG. 3 is a diagram corresponding to FIG. 2 showing another embodiment.

FIG. 4 is a view corresponding to FIG. 2 showing another embodiment of the canvas tension member exposed type.

FIG. 5 is a view corresponding to FIG. 3 showing another embodiment of the belt surface elastic cover coating type.

FIG. 6 is a view corresponding to FIG. 2 showing still another example of the canvas tension member exposed type.

FIG. 7 is a view corresponding to FIG. 3 showing still another embodiment of the belt surface elastic cover coating type.

FIG. 8 is a perspective view of a part of a conventional toothed belt using a rope tension member.

FIG. 9 is a plan view of an article conveying apparatus including a plurality of conveying belts shown in FIG.

[Explanation of symbols]

 1: Belt with wide tooth for conveyance 2 (2a) (2b) (2c): Canvas tension member 3: Belt-shaped tooth portion 4: Thin bridge 5: Belt-shaped tooth-shaped member 6: Resin elastic body layer 7 (7a, 7b) , 7c): Elastic cover

Claims (5)

[Scope of utility model registration request] 1. A tensile body composed of a wide canvas,
On the back surface of the tensile body, a strip-shaped toothed member made of a thermoplastic resin was attached, in which strip-shaped tooth portions extending in the width direction of the tensile body and arranged at a predetermined pitch were integrally connected by a thin bridge. A wide-toothed belt for transportation characterized in that 2. At least a laminate in which a canvas tension member having a wider width and a thermoplastic resin elastic layer attached to the back surface thereof are attached to the surface of the canvas tension member of the wide toothed belt according to claim 1. A wide toothed belt for transportation, characterized in that one is attached. 3. The wide-toothed conveyor belt according to claim 1, wherein the surface of the canvas tension member located on the belt surface is covered with an elastic cover made of a thermoplastic resin. 4. The canvas tension member exposed on the belt surface is D
3. The wide-toothed conveyor belt according to claim 1, which has been subjected to ip treatment. 5. The wide-toothed conveyor belt according to claim 1, wherein the surface of the canvas tension member or the surface of the elastic cover located on the surface of the belt is provided with a profile.