JPH083371Y2 - Belt conveyor with guide - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a belt conveyor with a guide, particularly when the conveyor with a guide is used in an automated machine for food processing and distribution terminals equipped with a small pulley diameter. The present invention relates to a belt carrying device with a guide that allows the belt to travel without causing meandering.

[Prior Art] Conventionally, as shown in FIG. 5, a conveyor belt 21 used in a belt conveyor with a guide is formed by attaching a guide portion 25 of, for example, a V shape, a square or a rectangle to the lower surface of a conveyor belt main body 22. It is known that the belt 21 is guided by passing it through a pulley P'having a guide groove 27 that fits with the belt, and the belt 21 is prevented from meandering. However, this structure has a large bending diameter on the pulley and prevents bending compression. Therefore, the guide portion is damaged quickly, and the belt needs to be replaced at an early stage due to the damage of this portion, and therefore, there is a drawback that the entire conveying device must be stopped.

Especially in recent years, this type of conveyor belt with a guide is used for automated machines for food processing and distribution terminals equipped with a small pulley diameter.
When 21 is used, when the guide portion 25 is V-shaped, the bending radius becomes small on the small pulley diameter.
Is compressed and the side faces are swollen as shown by the dotted line to make it difficult to fit in the V groove of the pulley, or the top surface of the belt is dropped due to the compressive deformation of the V guide portion 25.
There is a problem that peeling occurs easily (Fig. 5).

Further, when the guide shape is a square or a rectangle, this phenomenon tends to appear more prominently. In order to improve the above-mentioned drawbacks, the applicant of the present invention, in Japanese Utility Model Laid-Open No. 1-126317, has a V-guide with a vertical groove having a predetermined shape provided in the center of the bottom surface of a V-shaped cross-section guide provided on the lower surface of the belt body. I applied for a conveyor belt.

[Problems to be Solved by the Invention] However, the above V-guide-equipped transport belt having a vertical groove in the center of the bottom surface of the V-shaped guide has the conventional V-shaped, square,
Compared to a rectangular conveyor belt with guides, swelling and detachment of the guide side surface due to bending compression of the belt is greatly improved,
It is effective as a guide to prevent meandering for small pulley diameters, but in order to make it easier to run in small pulley diameters, in order to make the guide thickness thinner, distortion between pulley shafts, variation in tension in the belt width direction, etc. The belt meandering force generated by the above, that is, the guide is easily detached from the guide groove due to the thrust load.

The reason for this will be described with reference to FIG. 6. The conventional thrust load generated when the V-conveyor belt 21 travels is F, the inclined surface of the V guide 25 and the V guide groove 27 is θ, the rigidity E of the belt, and the belt thickness. D, the friction coefficient between the V guide 25 of the belt and the V guide groove 27 of the pulley is μ, and the relational expression of ED ³ ≧ Fcos θ sin θ-μ · F sin θ holds.

In this case, the belt rigidity (ED ³ ) is the total resultant force that the belt tries to detach, that is, the detaching force M (Fcosθsin of the V guide 25.
θ) to the friction resistance between V guide 25 and V guide groove 27 (μ ・
It is considered that desorption does not occur when it is larger than the value obtained by subtracting (Fsinθ).

Therefore, it is effective to increase μ or increase the belt rigidity in order to reduce the total force to be released. If the μ value of the guide side surface is simply increased, the load resistance when the guide side surface and the V guide groove come into contact with each other when the belt is running becomes large and it becomes difficult to run. Also, if the rigidity of the belt is increased, the small pulley diameter It becomes impossible to run. Therefore, a belt that is soft in the running direction and rigid in the width direction is used, and in order to reduce the detaching force of the V-shaped guide, a protrusion is provided on the side surface without increasing the μ value of the V-shaped guide. It has been found that a method of preventing detachment of the V-shaped guide by providing a concave portion that fits with the projection also on the side surface of the guide groove is effective.

The present invention was proposed as a result of intensive studies to eliminate this kind of problem, and by partially modifying the side surfaces of the guide and the guide groove provided on the lower surface of the conveyor belt main body,
An object of the present invention is to provide a belt conveying device with a guide, which can surely prevent the guide from being detached from the guide groove due to the meandering force of the belt, and can further reduce the thickness of the guide, so that the belt can travel with a smaller pulley diameter. It is what

[Means for Solving the Problems] In order to achieve the above-mentioned object, a feature of the present invention is that at least one guide having a predetermined shape is fixed to the lower surface of the belt main body along the longitudinal direction and fitted with the guide. A belt conveyor with a guide including a pulley having a guide groove, wherein the guide and the guide groove are provided with at least one profile that is fitted to both side surfaces of the guide groove so that the guide does not separate from the guide groove. is there.

As for the size of the profile to be fitted together, the profile on the protrusion side is formed smaller than the profile on the recess side.

[Embodiment] Next, a specific embodiment of the belt carrying device with a guide according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view of a guided belt conveyor 10 of the present invention, and FIG. 2 is an enlarged sectional view of a fitting portion between a V guide and a V guide groove of a pulley. 20
It shows a state in which the belt body 2 is fitted to a small pulley P having a diameter of mmφ or less. The belt main body 2 is woven from polyester fibers and other fibers having a small elongation, and is a core impregnated or coated with a thermoplastic resin such as polyurethane or PVC resin. The body canvas layer 3 and a cover layer 4 made of thermoplastic polyurethane, PVC or the like are formed on the core canvas 3 on both sides or one side to form a laminate. A guide portion 5 having a V-shaped cross section is fixed to the central portion of the lower surface of the belt main body 2 along the longitudinal direction of the belt, and the central portion of the bottom surface of the guide portion 5 has a cross-sectional shape of, for example, a semicircle, a V shape, a square shape, or the like. Vertical groove 6 is provided over the entire length of the guide.

At least one profile 8, 9 which is a feature of the present invention is provided on both side surfaces of the V-shaped guide portion 5 and the V-shaped guide groove 7 of the small pulley P which fits with the V-shaped guide.

More specifically, the V-shaped guide 5 is provided with projection profiles 8 having semicircular, semi-elliptical, and triangular cross-sectional shapes on both side surfaces, while the V-shaped guide 5 has projection profiles 8 formed therein.
The V-shaped guide groove 7 of the small pulley P at a position corresponding to the V-shaped guide groove 7 has a cross-sectional shape of a semicircle, a semi-oval, a triangle, or the like.
A recess profile 9 is provided which is larger than the projection 8 of the mold guide.

The projection profile 8 of the V-shaped guide 5 and the recessed profile 9 of the V-shaped guide groove 7 are set to have shapes, dimensions, intervals and the like so as to be fitted to each other, and normally, the V-shaped guide 5 and the V-shaped guide groove 7 have a space between them. It is desirable that the gap is 1 to 2 mm, and the gap between the projection 8 and the recess 9 when the profile is fitted is 0.5 to 1.0 mm.

The material of the guide portion 5 is formed of the same thermoplastic polyurethane or PVC as that of the cover layer 4, and the hardness thereof is preferably in the range of 40 ° to 85 ° at Shore A.

FIG. 3 shows a modified embodiment of the profile provided on both sides of the V-shaped guide 5 and the V-guide groove 7 of the pulley P fitted with the V-shaped guide 5, in which case the recessed profile 9 and the pulley are provided on both sides of the V-shaped guide 5. This is a case where one projection profile 8 is provided on both side surfaces of the V guide groove 7.

The example of the V-shaped guide of the belt and the V-shaped guide groove of the pulley has been described above, but the present invention is not limited to this, and the guide may be V-shaped, rectangular, or V-shaped notch type. Well, the guide groove of one pulley is not particularly limited as long as it fits with the guide shape. Needless to say, when the width of the belt main body is as wide as about 1000 mm or more, guides may be provided on both sides of the lower surface of the belt main body and each guide and the guide groove of the pulley may be provided with a profile.

Next, an example of an experiment conducted to confirm the effect of the present invention will be described.

As shown in FIG. 4, a head length of 1.5 m, a width of 1.0 m, a V-grooved pulley diameter of 20 mmθ, a head pulley 11, a tail pulley 12, a bend pulley 13, a flat pulley diameter of 20 mmθ, a snap pulley 14, a small diameter vent pulley 15, and a V guide. A belt conveyer with a guide including a conveyer belt 1 (21) with a head pulley
The eccentricity of 11 is set to a running state of about 3 ° to create a state in which the guide is easily separated, depending on the presence or absence of the V guide protrusion profile and the V guide groove recessed profile on the side surface of the V guide and the V guide groove that fits with the guide. As a result of running comparison, in the case of no profile, the V guide was separated from the V guide groove after running for about 33 hrs, frictional wear by the pulley of the V guide occurred, and peeling between the V guide and the belt resulted. On the other hand, when the profile was present, although some wear was observed in the V guide portion after running for about 290 hrs, no detachment from the guide groove was observed.

[Effect] As described above, the belt carrying device with a guide according to the present invention is
By providing the guides on the lower surface of the belt main body and the both sides of the guide groove of the pulley, which are fitted to each other,
It is possible to make the guide thinner than before and run it with a small pulley diameter.In that case, it is possible to prevent separation from the guide groove due to thrust load that tends to occur and to surely prevent the belt from meandering. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a fitted state of a belt and a pulley of a guided belt conveyor according to the present invention, and FIG. 2 is an enlarged sectional view of a fitted state of a belt guide portion and a pulley guide groove. 2 is a schematic side view showing the whole of a belt carrying device with a guide, and FIG. 5 is a cross-sectional view of a conventional belt carrying device with a guide. FIG. 6 is an explanatory diagram for explaining the detachment of the belt from the guide groove due to the thrust load when the belt is running. 1 …… Conveyor belt with V guide 2 …… Conveyor belt body 5 …… V guide 6 …… Vertical groove 7 …… V guide groove of pulley 8 …… Protrusion profile 9 …… Concave profile 10 …… Belt conveyor device with guide

Claims (2)

[Scope of utility model registration request] 1. A belt conveyer with a guide, comprising at least one guide having a predetermined shape fixed along the longitudinal direction of the lower surface of a belt body, and comprising a pulley having a guide groove for fitting with the guide, wherein the guide is removed from the guide groove. A belt conveying device with a guide, wherein one or more profiles are provided on both side surfaces of the guide and the guide groove so as not to separate from each other. 2. The belt conveyor with a guide according to claim 1, wherein the size of the profile to be fitted with each other is such that the profile on the projection side is smaller than the profile on the recess side.