JP2002087565A - Curved conveyer belt and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curved conveyer belt that can endure tensions both in the running direction and width direction in an outer periphery of a joint part and has no step in a part other than the outer periphery of the joint part. SOLUTION: This curved conveyer belt 1 is used in a curved part of a conveying conveyer and is formed endlessly by inter-joining both ends of a flat belt with a predetermined length. The outer periphery (A zone) of the joint part 30 is joined in a finger lapping method, and the part (B zone) other than the outer periphery is joined in a finger method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor line laid out in an elliptical shape or a U-shape or the like (for example, a curved feeding portion) in a conveyor line for light electric appliances or processed foods. It is an endless belt which is a conveyer belt to be attached (also simply referred to as a conveyor belt), which is formed by joining both ends of a flat belt manufactured to a predetermined length. In addition, since the curved conveyor belt is formed in a ring shape having a fan-shaped flat surface, the outer periphery of the fan shape has a longer running distance and a greater tension applied in the running direction, and the outer periphery is inward. In order to prevent the movement, it is necessary to apply tension also in the belt width direction. Further, the inner peripheral side of the sector has a feature that the traveling distance is short and the tension in the length direction is small.

More specifically, as shown in FIG. 3, a plan view of a conveyer is provided. A fan-shaped conveyor belt 1 is suspended between two tapered rolls 7, 7 '. 5 'is provided to prevent the outer periphery 3 of the conveyor belt 1 from moving inward. As shown in FIG. 4 (a), a partially enlarged view of a section taken along the line YY of FIG. 3, the bending guide means 5 sandwiches the outer periphery 3 of the conveyor belt 1 with guide bearings 6, 6 ', and Outside area 3
Is prevented from moving inward (in the direction of the arrow x). That is, due to the guide bearings 6, 6 ', the conveyor belt 1 receives tension in the width direction as well as in the traveling direction (length direction).

When the load (transportation amount, etc.) of this conveyor line is large, an ear bar 2 is provided at a peripheral portion 3 'of the conveyor belt 1 as shown in a partially enlarged cross section in FIG.
The lower surface of the ear bar 2 is supported by the guide bearing 6, and the inner surface of the ear bar 2 is pressed against the guide bearing 6 ″ to prevent the outer periphery 3 ′ of the conveyor belt 1 from moving inward. .

[0004]

2. Description of the Related Art One of the typical joining structures of a conventional conveyor belt is, as shown in a perspective view in FIG. 5 (a), one joining end 10 and the other joining end 10 'of a flat belt. And
It has a structure in which fingers 15, 16 are formed by cutting into a continuous V-shape (also referred to as a lightning bolt) that can be fitted to each other, and these fingers 15, 16 are abutted and joined via a joining material. In addition to the shape of the joining end portion, in addition to the continuous V-shape as in this example, there is also a structure in which the joining end portion is cut into a substantially trapezoidal shape or a wave-like shape (also referred to as a finger shape) and joined by joining. There is (finger method).

Another joining structure described in Japanese Utility Model Publication No. Sho 62-20763 discloses a joining structure in which one joining end 10 is cut into a finger shape (finger 14) and the other is joined, as shown in a perspective view in FIG. There is a joining structure in which the tip of the joining end 10 ′ is cut substantially linearly in the width direction and both ends are overlapped and joined (also referred to as a finger wrap method).

As shown in the perspective view of FIG. 7A, the joining procedure by the finger wrap method is about half of the upper part of one joining end 10 (the upper core and the cover material of the core woven fabric 20). Is cut out to form a flat cutting end 23, and the tip is cut into a finger shape to form a finger 14, and the other joining end 10 'as shown in a perspective view in FIG. 7 (b). Of the lower core (the lower core of the core fabric 20) is cut to form a flat cut end 22 between the upper core and the cover material. The tip of the cutting end 22 is cut substantially linearly in the width direction. As shown in a longitudinal sectional view of the joint portion in FIG. 7 (c), a flat cutting of the other joining end portion 10 'is performed on the cutting end portion 23 of the one joining end portion 10 with a joining material therebetween. The end portions 22 are overlapped and pressurized and heated to be joined (joining surfaces are indicated by thick lines a).

[0007]

However, the conventional conveyer conveyor belt having the above-mentioned structure and having the above-mentioned structure has the following problems.

[0008] When joined by the finger method, there is a feature that there is no step at the joined portion, and it is flexible, and there is no vibration or noise during traveling. At the portion, a strong tension is applied in the belt width direction together with the traveling direction, and the joining portion may be stretched in the width direction and loosen at this portion. This is because the joining ends are cut into a finger shape and joined by joining with the joining material, so that the fibers in the width direction of the core woven fabric are cut and the tensile strength in the belt width direction is reduced.

In the finger wrapping method, a portion where the core body woven fabric is not cut is provided at the joining portion, and the joint is wrapped and joined via a joining material, so that the tensile strength in the belt width direction can be sufficiently obtained. However, the thickness of the joint may be increased due to the joining material layer and the like, causing vibration during traveling to generate noise, or distortion may occur due to a difference in rigidity between the joint and other portions.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bent conveyor belt having a joint portion having a small difference in thickness with a limited joint portion having a thickness difference, which withstands tension in the running direction and the width direction.

[0011]

According to a first aspect of the present invention, there is provided a music conveyer belt which is used for a music conveyer of a conveyor, and which joins both ends of a flat belt having a predetermined length. An endless bent conveyor belt, wherein the outer peripheral portion of the joined portion of the bent conveyor belt has one joined end portion cut into a finger shape and the other joined end portion cut straight in the width direction. The joining ends are overlapped and joined, and portions other than the outer peripheral portion of the joining portion are cut into a finger shape that can fit the one joining end and the other joining end together. Are fitted and joined.

[0012] Since it is used in the music feeding section of the conveyor,
As described above, a tension in the width direction is applied to the conveyor belt, and a large tension is applied particularly to the outer peripheral portion. Therefore, in the present invention, the outer peripheral portion is configured to withstand particularly the tension in the width direction corresponding to the tension applied to the outer peripheral portion. That is, the outer peripheral portion of the joining portion of the bent conveyor belt has one joining end portion cut into a finger shape,
Overlap and join the other joint end that is cut straight in the width direction (so-called finger wrap joint)
Have been. Thus, the tensile member in the width direction at the other joint end is not cut, so that it can sufficiently withstand the stress in the width direction. It is to be noted that the transported material is rarely transported in the outer peripheral portion, and a slight thickness difference is allowed.

The portion other than the outer peripheral portion of the joining portion is cut into a finger shape that allows one joining end and the other joining end to be fitted to each other, and is fitted and joined (so-called finger joint). Therefore, the thickness of the joining portion becomes uniform, so that even when the transported article is loaded and travels, it does not vibrate and the generation of noise is small. The portion other than the outer peripheral portion is mainly a portion for loading the conveyed material, and the stress applied in the width direction is smaller than that of the outer peripheral portion, but it is required that the vibration during traveling due to the thickness difference is small. .

As described above, the outer peripheral portion of the joint portion employs the finger wrap method having a large tensile strength in the width direction, and portions other than the outer peripheral portion of the joint portion are joined by the finger method having good running stability. I have. In addition, the transport of the transported material is small in the outer peripheral portion, a slight thickness difference is allowed, and the tension in the width direction is small in portions other than the outer peripheral portion, and the finger method can be used.

[0015] The music feeding conveyor belt according to claim 2 is
The outer peripheral portion joined by the finger wrap method is 25 to 40% of the entire width of the belt. If the width of the outer peripheral portion joined by the finger wrap method is less than 25% of the entire width of the belt, the outer peripheral portion is partially stretched due to the tension in the width direction that exceeds 25% and the stable traveling cannot be performed. 40%
When the load exceeds the limit, the area that is joined by the finger method with less vibration is reduced, the range where the load is loaded becomes narrower, and when the load is loaded on this finger wrap jointed part, vibration and noise may occur. is there.

According to a third aspect of the present invention, in the method of manufacturing a bent conveyor belt, the outer peripheral portion of one of the joining ends of the flat belt is cut into a finger shape, and a portion other than the outer peripheral portion is smaller than the outer peripheral portion. Cut into a finger shape with a width, and at the same time, cut the tip of the outer peripheral portion of the other joint end of the flat belt into a straight line, and make a portion other than the outer peripheral portion into a finger shape with a smaller width of the one joint portion After being cut into a finger shape that can be fitted, the outer peripheral portion of the one joint end and the outer peripheral portion of the other joint end are overlapped via a joining material, and at the same time, the outer periphery of the one joint end is A portion other than the peripheral portion and a portion other than the outer peripheral portion of the other joining end are fitted and joined via a joining material.

In this method of manufacturing a bent conveyor belt, both ends of the flat belt are divided into an outer peripheral portion and a portion other than the outer peripheral portion, cut into respective shapes, and then superposed or fitted. Join. According to this manufacturing method, the cutting operation and the joining operation can be performed simultaneously on the outer peripheral portion and other portions.

The width of the finger shape at the outer periphery of the one joint end is formed wider than the width of the finger at portions other than the outer periphery of the joint end. This makes it possible to increase the tensile strength in the width direction while leaving many tensile members in the width direction.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a music feeding conveyor belt according to the present invention will be described with reference to the drawings. FIG. 1 shows a perspective view of a joint portion of the bent conveyor belt of the present invention,
FIG. 2 is a plan view showing a shape obtained by cutting both joining ends of a flat belt in a pre-joining process.

As shown in a perspective view in FIG. 1, a joint portion 30 (the number of fingers is partially omitted) of the conveyer belt 1 is
It is divided into an outer peripheral portion A (a portion near the outer peripheral portion 3) and a portion B other than the outer peripheral portion. The outer peripheral portion A is joined by a finger wrap method, and the portion of the finger 14 of the one joining end 10 of the flat belt is overlapped and joined below the cut joining end 26 of the other joining end 10 '. I have. The part B other than the outer peripheral part is composed of one joint end 10 and the other joint end 1
Fingers 15 and 16 are formed on both of the 0's, and the two are fitted and joined.

FIG. 2 shows a shape of the flat belt having a predetermined length, in which the joining ends 10, 10 'of the flat belt are cut in a step before joining both ends thereof. One of the joining ends 10 and the other joining end 10 'are cut in the width direction into an outer peripheral portion A (also referred to as an A zone) and a portion B (also referred to as a B zone) other than the outer peripheral portion. The A zone of the joint end 10 is cut into relatively wide and short fingers 14,
The B zone is cut into fingers 15 that are longer than fingers 14. The A zone reduces the fiber cut in the width direction to cope with the tension in the width direction, and the B zone maintains the tensile strength (coupling force) in the length direction. The A zone of the other joint end 10 ′ is cut straight at the tip in the width direction, and the B zone is cut into a finger 16 that fits into the formed finger 15 of the joint end 10.

The ratio of the length in the belt width direction between the A zone and the B zone is in the range of A / (A + B) = 0.25 to 0.40, and is designed according to the width of the conveyor belt and the degree to which the traveling direction is curved. Is done. This is because the range of 25 to 40% of the width of the conveyor belt from the outer periphery of the conveyor belt is particularly easy to loosen, and it is necessary to apply tension in the outer peripheral direction.

The shape of the finger 14 in the A zone (width,
The length c) is designed to be wider and shorter than the shapes (width d, length a) of the fingers 15 and 16 in the B zone. This is because, in the A zone, a large tension is applied in the width direction, so that fibers (tensile members) in the width direction are not cut as much as possible. Similarly, since the A zone of the other joint end 10 'is linearly cut at the tip in the width direction, the fibers in the width direction are not cut, and the tensile strength in the width direction does not decrease. In addition, by cutting the A zone of one joint end portion 10 into a finger shape, when overlapping and joining, it is possible to reduce the step of the joint portion by being crushed strongly as far as the tip of the finger. Further, by cutting the linearly cut end of the other joint end 10 'so as to become gradually thinner in the length direction, a step at this portion can be reduced.

As an example, when the width of the flat belt is 280 mm, the width of zone A = 100 mm and the width of zone B = 1.
80 mm, the shape of one joining end 10 of the flat belt is
Assuming that the fingers 14 in the A zone have a length (c) = 30 mm and a width (f) = 15 mm, and the fingers 15 in the B zone have a length (a) = 50 mm and a width (d) = 10 mm, and their tips are in the width direction. It is cut in a straight line. The A zone of the other joining end 10 ′ has its tip cut linearly in the belt width direction, and the B zone has one joining end 10 ′.
A finger 16 having a shape that can be fitted to the shape of the finger 15 is formed. In addition, A of the joint end 10 ′
The tip of the zone is designed to be shorter than the tip of the finger 16 of the B zone. This is because the core body canvas has two layers at the joint portion 30 (see FIG. 1), and the range in which the rigidity in the longitudinal direction is increased is reduced.

For this embodiment, FIG.
The procedure for cutting the 0 and 10 'A zones, overlapping and joining, and the cross section after joining will be described (the core layer is one layer). Since the B zone is joined by the conventional finger joint shown in FIG. 5A, it is omitted, and only the A zone will be described.

FIG. 6A is a perspective view showing a state in which one of the joining ends 10 is cut.
The cover member 35 is laminated on the upper surface of the first member 1. First, the cover material 35 at the joint end 10 is cut off to leave only the core layer 31,
Subsequently, the core layer 31 is cut into a finger shape.

FIG. 6B is a perspective view showing a state in which the other joint end 10 ′ is cut, and the tip 34 is cut straight in the width direction. The cutting surface 32 is cut while being inclined in the length direction. One joint end 10 (FIG. 6)
This is because the step (a) is overlapped and joined so as to alleviate a sudden step at the joint.

FIG. 6C is a sectional view taken along the line XX of FIG. 1 (a sectional view in the longitudinal direction of the zone A), and shows a joined state of the joined conveyer belt 1. The thick solid line a indicates the joining surface, and the joining material is inserted between the cutting surface 33 of the joining end 10 (see FIG. 6A) and the cutting surface 32 of the joining end 10 ′ (see FIG. 6B). They are superposed, interposed, pressurized and heated if necessary for bonding.

Even if the core layer 31 has only one layer, a portion where the core layer 31 has two layers is formed at this joint portion. By cutting the core layer 31 of the part 10 into a finger shape, the total thickness of the joint part gradually changes in the length direction,
Sudden steps are reduced. There is little load in the A zone based on such a finger wrap method, and vibration due to thickness does not cause much problem. In zone B, which mainly transports the conveyed object, the conveyed object is stably conveyed without any change in thickness due to the finger method.

As another embodiment, a case where the number of core layers is two will be described with reference to FIGS. As in the case where the core has a single layer, the B zone is joined by the conventional finger joint shown in FIG. 5A, and the A zone is also joined by the conventional finger joint shown in FIG.
Are joined by a conventional finger wrap joint shown in FIG.

As shown in FIGS. 7 (a) and 7 (b), the zone A is obtained by cutting one layer of the core layer at the joint ends 10, 10 'and cutting each end into a finger shape or a straight line. As shown in a longitudinal sectional view of the joint portion in FIG. 7C, the respective cutting ends 22 and 23 are overlapped via a joining material, and are pressurized and heated to perform finger lap joint. The B zone is, as shown in FIG.
Fingers 15 and 16 fitted to each other are formed at 0 and 10 ', fitted via a bonding material, and pressurized and heated to be bonded.

The zone A at both the joint ends 10, 10 'is a woven fabric having two layers of the core layer of the flat belt, and each joint end is cut one by one. Each of the portions has a feature that the core layer becomes two layers and the step is reduced. In addition, the A zone joined by the finger wrap method is such that at least one core body is left without being cut at any of the joining portions, and can cope with the tension in the width direction of the belt, and is stretched or broken. There is no.

In the case where the music feeding conveyor belt 1 thus joined is incorporated into the music feeding conveyor shown in FIG. 3 and run, the A zone of the music feeding conveyor belt 1 is set to the fan-shaped outer peripheral side, and FIG. As shown in FIG. 3, a sectional view taken along the line YY of FIG.
6 'to prevent the peripheral portion 3 of the music feeding conveyor belt 1 from moving inward.

[0034]

As is apparent from the above description,
The outer peripheral portion of the bent conveyor belt according to claim 1, wherein the outer peripheral portion is joined by a finger wrap method, and a portion other than the outer peripheral portion is joined by a finger method, so that a large tension is applied in the width direction. In the part, since the tensile member in the width direction of the core layer is joined without being cut, it does not loosen (elongate) or break due to the above-mentioned tension in the width direction applied during bending traveling. . In addition, a portion other than the outer peripheral portion for transporting the conveyed article is joined by a finger method, so that the change in thickness is small, the vibration and noise are small, and the convey can be performed stably.

The music conveyor belt according to claim 2 is
By setting the width of the joint portion by the finger wrap method to be in the range of 25 to 40% of the entire width of the belt, a portion of the outer peripheral portion to which the tension in the width direction is applied is reinforced, and the portion other than the outer peripheral portion by the finger method is Can secure a sufficient range for placing and transporting the transported object.

According to a third aspect of the present invention, there is provided a method of manufacturing the bent conveyor belt according to the first or second aspect, wherein one of the joined ends and the other are joined. The part is divided into an outer peripheral part (A zone) and a part other than the outer peripheral part (B zone) and molded and then joined by pressing and heating via joining means. It is possible to simultaneously carry out two types of joining methods, namely a lapping method.

[Brief description of the drawings]

FIG. 1 shows a perspective view of a joining portion 30 of a bent conveyor belt 1 of the present invention.

FIG. 2 is a plan view in which a joining end of a flat belt having a predetermined length is cut as a pre-process for joining the bent conveyor belt 1 of the present invention.

FIG. 3 shows a plan view of a music conveyor in which the music conveyor belt 1 of the present invention is used.

FIG. 4 is a sectional view taken along the line YY of the bending guide means 5 of the music feeding conveyor shown in FIG. 3, and FIG. 4 (a) is a simplified diagram used for the music feeding conveyor belt 1 having a single core layer. FIG. 4 (b) shows a strong bending guide means 5 'used in a bending conveyor belt or the like having two core layers.

FIG. 5 is a perspective view of a joining portion of a conventional bent conveyor belt, FIG. 5 (a) shows a joining portion of a finger type, and FIG. 5 (b) shows a joining portion of a finger wrap type.

FIG. 6 shows a joining procedure by a finger wrap method of an outer peripheral portion (A zone) of a joining portion of a bent conveyor belt having one core layer, and FIG. 6 (a) shows one joining end 10; FIG. 6B is a perspective view showing a cut-off state, FIG. 6B is a perspective view showing a cut-off state of the other joint end 10 ′, and FIG. 6C is a longitudinal sectional view of the joint. .

FIG. 7 shows a joining procedure by a finger method of an outer peripheral portion (A zone) of a joint portion of a bent conveyor belt having two core layers, and FIG. 7 (a) cuts one joint end portion 10; FIG. 7B is a perspective view illustrating a state in which the other joint end 10 ′ is cut, and FIG.
(C) shows a longitudinal sectional view of the joint.

[Explanation of symbols]

 1: Bending conveyor belt 3: Outer periphery 5: Bending guide means 10, 10 ': Joint end of flat belt 14, 15, 16, Finger 30: Joint

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29L 29:00 B29L 29:00 F term (Reference) 3F023 AA03 AB09 AB10 BA02 BB01 BC01 DA03 3F024 AA01 AA04 AA19 CA04 CA08 4F211 AD08 AD18 AD20 AD25 AD27 AG16 TA03 TC09 TD07 TD11 TH02 TH18 TH19 TJ30 TQ01 TQ10

Claims (3)

[Claims] An endless curved conveyor belt which is used in a curved conveyor of a conveyor and is formed by joining both ends of a flat belt of a predetermined length to form an endless belt. An outer peripheral portion is joined by overlapping one joint end portion cut into a finger shape and the other joint end portion cut straight in the width direction, and a portion other than the outer peripheral portion of the joint portion Wherein the one joining end and the other joining end are cut into a finger shape that can be fitted to each other, and these ends are fitted and joined to each other. 2. An outer peripheral portion of the joining portion has a width of 2
The conveyor belt according to claim 1, wherein said belt is 5 to 40%. 3. A method for manufacturing a curved conveyor belt, which is used in a curved conveyor section of a conveyor and has both ends of a flat belt of a predetermined length and is formed into an endless shape, wherein one of the flat belts is joined. The outer peripheral portion of the end portion is cut into a finger shape, and portions other than the outer peripheral portion are cut into a finger shape having a width smaller than the outer peripheral portion, and at the same time, the tip of the outer peripheral portion of the other joining end portion of the flat belt Is cut in a straight line, and the portion other than the outer peripheral portion is cut into a finger shape that can be fitted into the small-width finger shape of the one joint portion, and then the outer peripheral portion of the one joint end portion and the other peripheral portion are cut out. Overlap the outer periphery of the joint end with the joint material,
A bending conveyor belt, wherein a portion other than the outer peripheral portion of the one joining end and a portion other than the outer peripheral portion of the other joining end are fitted and joined via a joining material. Manufacturing method.