JP6854176B2 - Belt with profile - Google Patents

Description

The present invention relates to a belt with a profile. More specifically, while strengthening the mounting strength of the profile, the profile mounting portion and the core wire layer of the belt body are prematurely damaged when the profile is wound around a pulley or when a workpiece is transported. Regarding belts with profiles that have been prevented.

By fusing and attaching profiles (attachments, protrusions, protrusions) of various shapes to a timing belt equipped with a belt body having multiple teeth on the running surface, fields such as transport devices, maneuvering or operating devices, etc. In, the timing belt is made to have multi-functionality. For example, an article can be conveyed by a protrusion provided on the back surface of the belt, and if the protrusion is detected by a sensor, it can function as a maneuvering or operating device.

Patent Document 1 discloses a technique of forming a taper for relaxing stress concentration at a fusion site where the side surface of the protrusion intersects the back surface of the belt to prevent the fusion site from coming off or breaking.

JP-A-2009-190240

By forming a taper to relax the stress concentration as in Patent Document 1, it certainly contributes to the relaxation of the stress concentration at the fusion site. However, a timing belt having a taper on a protrusion cannot function as a transport device unless the article to be transported matches the tapered shape. Therefore, it has been an obstacle to giving the timing belt multifunctionality.

Therefore, an object of the present invention is to provide a belt with a profile, which can freely design the shape of the profile, is not limited to the shape of the object to be conveyed, and can give the timing belt multifunctionality.

Other problems of the present invention will be clarified by the following description.

The above problems are solved by the following inventions.

(Claim 1)
Equipped with a belt body with multiple teeth on the running surface,
At the upper part of the tooth portion, inside the belt body, a core wire layer composed of a plurality of core wires embedded in parallel in the width direction along the longitudinal direction is formed.
Profiles are provided on the back surface of the belt body at predetermined intervals along the longitudinal direction.
A belt with a profile, which is located on the lower surface of the profile or in the vicinity of the lower surface, and which reduces the density of core wires in the core wire layer.
(Claim 2)
The belt with a profile according to claim 1, wherein the core wire reduces the core wire density in the core wire layer so as to avoid a position corresponding to both side portions or the vicinity of both side portions of the lower surface surface of the profile.
(Claim 3)
The belt with a profile according to claim 2, wherein the core wire reduces the core wire density in the core wire layer so as to avoid a position corresponding to the central portion of the lower surface of the profile.
(Claim 4)
The profiled belt according to claim 1, wherein the core wire reduces the core wire density in the core wire layer so as to avoid a position corresponding to the entire lower surface surface of the profile.
(Claim 5)
The belt with a profile according to claim 1, wherein the distance between the core wires in the core wire layer located on the lower surface of the profile is evenly widened to reduce the core wire density in the core wire layer.

According to the present invention, it is possible to provide a belt with a profile that can freely design the shape of the profile, is not limited to the shape of the object to be conveyed, and can give the timing belt multifunctionality.

A perspective view showing a partially cutaway belt with a profile according to the first embodiment of the present invention. A perspective view showing a partially cutaway belt with a profile according to another embodiment of the present invention. Graph showing stress distribution at the joint of profiled belt Schematic perspective view of the main part of the profiled belt according to the first embodiment of the present invention. (A) Plan view of the main part of the profiled belt according to the second embodiment of the present invention, (b) Side view of the main part of the profiled belt according to the second embodiment of the present invention. (A) Plan view of the main part of the profiled belt according to the third embodiment of the present invention, (b) Side view of the main part of the profiled belt according to the third embodiment of the present invention. (A) Plan view of the main part of the profiled belt according to the fourth embodiment of the present invention, (b) Side view of the main part of the profiled belt according to the fourth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First, an example of a toothed belt to which the profiled belt according to the present invention can be applied will be described with reference to the drawings.
FIG. 1 is a partially cutaway perspective view showing an example of a toothed belt to which the profiled belt according to the present invention can be applied, and FIG. 2 is another example of a toothed belt to which the profiled belt according to the present invention can be applied. It is a partial notched perspective view which shows.

<Example shown in FIG. 1>
This form shows an example of a flex belt.
In the endless belt shown in FIG. 1, a plurality of tooth portions 5 are formed on the traveling surface 1a of the belt main body 1.
The traveling surface 1a of the belt body 1 is an inner peripheral surface of the belt body 1 and is a surface in contact with the pulley.
Since the toothed belt on which the plurality of tooth portions 5 are formed meshes with the teeth of the pulley and transmits the transmission, accurate synchronous transmission can be performed like a chain or a gear, and the belt functions as a timing belt.
Each tooth portion 5 is configured to have a trapezoidal cross section, for example, but is not particularly limited. It is also preferable that the surface of the pulley in contact with the teeth is an involute curved surface. The tooth bottom surface 6 is between the two adjacent tooth portions 5 and 5.

In the belt main body 1, a plurality of core wires 2, 2 ... A core wire layer consisting of is formed.
In the belt body 1, the back surface (outer peripheral surface) 1b to the plurality of tooth portions 5 on the traveling surface 1a are integrated including the core wire 2.

For the core wire 2, a fine wire made of a metal material such as steel or stainless steel, or a fine wire made of a fiber material such as an aramid fiber, a glass fiber, a carbon fiber, a polyamide fiber, a polyester fiber, or a PBO (polyparaphenylene benzoxazole) fiber can be used. it can.
Further, as the core wire 2, a stranded wire obtained by twisting a material obtained by combining any of the fine wire of the metal material and the fine wire of the fiber material can also be used.

In this form, one core wire 2 is spirally wound and embedded so as to be continuous over the entire circumference of the belt main body 1. As shown in FIG. 1, the flex belt is characterized in that one core wire 2 is spirally wound and embedded in the core wire layer.

<Example shown in FIG. 2>
This form shows an example of a joint belt.
The endless belt shown in FIG. 2 has a plurality of tooth portions 5 formed on the traveling surface 1a of the belt body 1, and functions as a timing belt in the same manner as the flex belt shown in FIG. In the joint belt, a plurality of core wires 2, 2, ... In the belt body 1 are not continuous over the entire circumference of the belt body 1, and fragmentary core wires 2 having a start end and an end end are core wire layers. It is characterized by being buried inside.

As the material of the core wire 2, the fine wire of the fiber material mentioned in the flex belt can be used.

The flex belt shown in FIG. 1 has a higher allowable tension strength than the joint belt shown in FIG. 2 under the same conditions.
When applying the above belt to the profiled belt according to the present invention, a flex belt can be selected and applied if strength is required, and if strength is not so required, a joint belt or linear belt can be applied. The belt may be selected and applied.

Next, an embodiment of the profiled belt according to the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 3 is a schematic perspective view of a main part of the profiled belt according to the first embodiment of the present invention.
In FIG. 3, a plurality of core wires 2 and 2 embedded in the belt main body 1 in the upper part of the tooth portion 5 and inside the belt main body 1 in parallel in the width direction along the longitudinal direction (in the direction of arrow R in FIG. 1). ... The core wire layer 20 is formed.
The profile 3 is formed on the upper part of the core wire layer 20 in which the core wire 2 is embedded.

In this embodiment, the number of core wires in the core wire layer 20 located on the lower surface of the profile 3 is thinned out. Specifically, the core wires 2, 2, ... In the core wire layer 20 are buried, and among them, the density of the number of core wires 2b in the core wire layer 20 located on the lower surface (hereinafter, necessary). Correspondingly, the core line density) is lowered.

That is, among the predetermined number of core wires 2 and 2b to be embedded according to the size of the belt main body 1, the core wires 2b in the core wire layer 20 located on the lower surface of the profile 3 are not buried. By doing so, the density of the core wire is reduced.

The core wire 2b is not limited to the lower surface of the profile 3, and may be near the lower surface. This is because the stress applied to the profile can be alleviated by lowering the core line density of the core wire located on the lower surface or the vicinity of the lower surface, and cracks or breakage of the joint portion 3a can be prevented. Details will be described later.

The method for reducing the core wire density in the core wire layer 20 located on the lower surface or the vicinity of the lower surface of the profile 3 is not particularly limited, but the core wire spacing in the belt width direction is not limited to any type of flex belt, joint belt, or linear belt. Should be different. The width direction of this belt is a direction orthogonal to the longitudinal direction of the belt (the traveling direction of the belt), which is the direction toward which the core wire is directed.

In the embodiment shown in FIG. 3, the core wire 2 is embedded so as to avoid positions corresponding to the central portion 3b and the side portions 4a and 4b of the profile 3 and the vicinity of both side portions thereof where the stress becomes high. That is, the core wire 2 is not embedded in the central portion 3b of the profile 3, the side portions 4a and 4b, and the positions corresponding to the vicinity of both side portions thereof.

In this embodiment, the present inventor investigated the stress distribution at the junction (fused portion) of the profile when determining the site for reducing the core line density. The result is shown in FIG. FIG. 4 is a graph showing the stress distribution at the joint portion (fused portion) of the profile.

The graph shown in FIG. 4 is larger in the width direction (left side portion, center portion, right side portion) of the belt body in both side portions 4a and 4b (positions of "-5" and "5") of the profile 3. It is also larger in the central part (position of "0"). This graph shows the stress change at the joint 3a due to the bending of the belt body or the lateral load on the profile 3.

Since the core wire 2 is not embedded at a position corresponding to both side portions 4a and 4b, which is a mode for lowering the core wire density, even if stress is concentrated at this position, the belt body 1 stays at the core wire 2 at this position. Since the belt body 1 is not restrained by the belt body 1, the belt body 1 is easily deformed, the stress is dispersed, and the joint portion 3a is not cracked or broken.

Since there is no core wire 2 at this position, such deformation of the belt body 1 does not cause distortion in the back surface portion 1b of the belt body 1 and does not cause peeling in the core wire layer 20.

Further, in this profiled belt, even if the width of the joint portion 3a is widened with respect to the pulley diameter, the bending stress from the root portion of the joint portion 3a toward the core wire layer 20 is dispersed, and cracks in the joint portion 3a occur. No damage will occur.

In a flex belt in which the core wire 2 has a spiral shape, the core wire 2 is deviated to a desired position in the width direction of the belt body 1 when it is spirally wound during manufacturing of a belt with a profile. be able to. Therefore, the core wire 2 can be embedded in a spiral shape while avoiding the positions corresponding to the side portions 4a and 4b of the profile 3 and the vicinity of both side portions thereof.

Further, in the joint belt in which the core wire 2 is intermittently embedded, the core wire 2 is embedded in the belt main body 1 at the time of manufacturing the belt with profile, in the width direction and the longitudinal direction of the belt main body 1 (FIG. 2 It can be buried only at a desired position in the direction of the middle arrow R). Therefore, the core wire 2 can be embedded in the belt main body 1 while avoiding the positions corresponding to the side portions 4a and 4b of the profile 3 and the vicinity of both side portions thereof.

In the present embodiment, as a mode for lowering the core wire density, the core wire 2 is embedded while avoiding a position corresponding to the central portion 3b (the central portion in the width direction of the belt body 1) of the profile 3 where the stress becomes high.

Since the core wire 2 is not embedded at the position corresponding to the central portion 3b of the profile 3, even if the stress at this position becomes high, the belt body 1 is not restrained by the core wire 2 at this position, so that the belt The main body 1 is easily deformed, and the joint portion 3a is not cracked or damaged.

Since there is no core wire 2 at this position, such deformation of the belt body 1 does not cause distortion in the back surface portion 1b of the belt body 1 and does not cause peeling in the core wire layer 20.

It is possible to not embed the core wire 2 at the position corresponding to the central portion 3b of the profile 3 in either the flex belt or the joint belt, as in the case of the both side portions 4a and 4b described above.

In the embodiment shown in FIG. 3, the profile 3 is a protrusion, an attachment, or a protrusion, and can be used for transportation, maneuvering, and the like. The profile 3 can be formed into a rectangular parallelepiped shape or various other shapes depending on the shape of the work to be transported or steered and the content (direction) of the transport or maneuvering.

The profile 3 is preferably fused and fixed to the belt body 1, for example. The profile 3 may be adhesively fixed to the belt body 1 instead of being fused and fixed.

Further, the profile 3 may be a thick portion integrally formed with the belt body 1. Further, the back surface portion 1b of the thickly formed belt body 1 may be cut to a predetermined thickness to leave a thick portion as a part, and this thick portion may be used as the profile 3.

[Second Embodiment]
5A and 5B are views showing a profiled belt according to a second embodiment of the present invention, FIG. 5A is a plan view of a main part of a profiled belt according to a second embodiment of the present invention, and FIG. It is a main part side view of the belt with a profile of the 2nd Embodiment of this invention.

As for the profiled belt of the second embodiment, the description is incorporated for the part having the same configuration as that of the first embodiment, and the description is omitted.

Examples of the mode for reducing the core wire density in the profiled belt include the mode shown in FIG. In the embodiment shown in FIG. 5, the core wire 2 is embedded while avoiding the entire joint portion 3a (lower surface) of the profile 3 to reduce the core wire density. That is, in this embodiment, the core line density of the core wire layer located on the entire lower surface of the profile is reduced.

In this belt with a profile, when the profile 3 has flexibility, it is possible to prevent the core wire 2 from impairing the flexibility of the profile 3. That is, the flexibility of the profile 3 is sufficiently exhibited by the deformation of the belt body 1 together with the profile 3.

[Third Embodiment]
6A and 6B are views showing a profiled belt according to a third embodiment of the present invention, FIG. 6A is a plan view of a main part of a profiled belt according to a third embodiment of the present invention, and FIG. It is a main part side view of the belt with a profile of the 3rd Embodiment of this invention.

As for the profiled belt of the third embodiment, the description thereof is incorporated for the part having the same configuration as that of the first embodiment, and the description is omitted.

As shown in FIG. 6, this profiled belt can be configured by embedding a core wire 2 while avoiding a position corresponding to the shape of the profile 3 when the profile 3 has a special shape. As a special shape of the profile 3, it is conceivable that the thickness distribution is peculiar, or that the profile 3 is formed by slitting or pasting.

The position where the core wire 2 is embedded can be appropriately set according to the belt type, the number of pulley teeth, the joining position and the number of profile 3s, and the like.

In the example shown in FIG. 6, the profile 3 has an "H" shape including two rectangular parallelepiped portions extending in the longitudinal direction of the belt body 1 and a reinforcing portion connecting the central portions of these rectangular parallelepiped portions. Is formed in.

In the profiled belt having the profile 3, avoid the positions corresponding to the joint portion (lower surface) and the vicinity of the joint portion (lower surface) of the two rectangular parallelepiped portions extending in the longitudinal direction of the belt body 1 other than the reinforcing portion. The core wire 2 is buried. That is, in this embodiment, the core line density of the core line layer located at the center portion of the profile, the joint portion, and the vicinity of the joint portion is reduced.
This makes it possible to prevent the profile 3 from hindering the flexibility of the belt body 1 when the belt body 1 is bent, including when the belt body 1 is wound around the pulley.

[Fourth Embodiment]
7A and 7B are views showing a profiled belt according to a fourth embodiment of the present invention, FIG. 7A is a plan view of a main part of a profiled belt according to a fourth embodiment of the present invention, and FIG. 7B is a book. It is a main part side view of the belt with a profile of the 4th embodiment of the invention.

As for the profiled belt of the fourth embodiment, the description thereof is incorporated for the part having the same configuration as that of the first embodiment, and the description is omitted.

As shown in FIG. 7, this profiled belt has a plurality of profile 3s, and each profile 3 covers the entire width of the belt body 1. Further, each of the plurality of profiles 3 is provided corresponding to each tooth portion 5.

In this case, the core wire density (the number of core wires 2 per constant width) of the core wires 2 is reduced over the entire width of the belt body 1. That is, in this embodiment, the core line density of the core wire layer located on the entire lower surface of the profile is reduced.
This makes it possible to prevent the profile 3 from hindering the flexibility of the belt body 1 when the belt body 1 is bent, including when the belt body 1 is wound around the pulley.

In each of the above-described embodiments, the endless belt having no end has been described, but the profiled belt according to the present invention is not limited to this, and may be configured as an endd belt having an end.

In a belt with a profile, stress is concentrated and cracks progress due to the tension between the external force applied to the profile and the core wire (tensile tension) of the belt body. As a result, there is a risk of damage on the profile fusion surface or peeling of the core wire in the core wire layer.

In the case of the form shown in FIG. 5 in which the dimension of the fusion width of the profile 3 is longer than the length of the tooth portion, since the core wire does not completely exist on the joint surface of the profile 3, the core wire (tensile tension) of the belt body. ), Stress concentration does not occur and cracks do not progress.

The form shown in FIG. 6 also has a form in which the dimension of the fusion width of the profile 3 is longer than the length of the tooth portion, but since the ratio of the core wire present on the joint surface of the profile 3 is extremely small, the belt main body. Due to the tension of the core wires (tensile tension), stress is concentrated and cracks do not progress.

1: Belt body 1a: Running surface 1b: Back part 2: Core wire 3: Profile 3a: Joint part 3b: Central part 4a, 4b: Both sides 5: Tooth part 6: Tooth bottom

Claims (5)

Equipped with a belt body with multiple teeth on the running surface,
At the upper part of the tooth portion, inside the belt body, a core wire layer composed of a plurality of core wires embedded in parallel in the width direction along the longitudinal direction is formed.
Profiles are provided on the back surface of the belt body at predetermined intervals along the longitudinal direction.
A belt with a profile, which is characterized by lowering the core line density in the core wire layer located on the lower surface of the profile and in the vicinity of the lower surface. The belt with a profile according to claim 1, wherein the core wire reduces the core wire density in the core wire layer so as to avoid positions corresponding to both side portions and the vicinity of both side portions of the lower surface surface of the profile. The belt with a profile according to claim 2, wherein the core wire reduces the core wire density in the core wire layer so as to avoid a position corresponding to the central portion of the lower surface of the profile. The profiled belt according to claim 1, wherein the core wire reduces the core wire density in the core wire layer so as to avoid a position corresponding to the entire lower surface surface of the profile. The belt with a profile according to claim 1, wherein the distance between the core wires in the core wire layer located on the lower surface of the profile is evenly widened to reduce the core wire density in the core wire layer.

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