JPH03259810A - Belt easy to laterally move carried material - Google Patents

Abstract

PURPOSE:To facilitate the lateral movement of a workpiece by plain-weaving warps in belt advancing direction, and further twill-weaving different wefts with skipping a plurality of warps on the belt surface side followed by impregnation with a resin in a belt for classification line of delivery center. CONSTITUTION:About 100-denier multifilaments are used as warps A, about 0.3-mmphi monofilaments as wefts B, and the warps A are plain-weaved in the advancing direction of a belt. Wefts C consisting of about 150-densier multifilaments are twill-weaved with the plural, for example, five, warps A being skipped on the belt surface to weave a duck of double weave structure. This is impregnated with polyurethane resin to form a belt. According to this constitution, the lateral frictional resistance can be reduced, and the longitudinal frictional resistance can be increased, resulting in the easy lateral movement of a carried material.

Description

Detailed Description of the Invention (Field of Application) The present invention is a belt in which objects to be conveyed do not slide in the direction of movement of the belt, but can easily slide in the lateral direction, and is used in applications such as packing and packaging in distribution centers. It is used in conveyor belts for sorting goods, inspection lines for parts, etc., and conveyor belts for printed matter (1).

(Prior art) Conventionally, this type of belt has a resin layer formed on its surface, but when moving an object in a direction transverse to the traveling direction, the frictional resistance is large and the object is Lateral movement was sometimes difficult.

In recent years, belts have been used that have a canvas-like surface impregnated with resin, which is made of plain-woven canvas with warp threads running in the traveling direction (conveying direction) of the bell 1~ and weft threads running in a direction perpendicular to the warp threads. It's starting to look like this.

Although such a plain-woven canvas belt has a significantly lower coefficient of friction and is more likely to slip than a belt with a cover resin layer formed on its surface, this is still not sufficient and no consideration has been given to side-slipping or the like.

In other words, in such a plain-woven canvas belt, the coefficient of friction in the longitudinal direction and the transverse direction are almost equal, so that the conveyed object does not slide on the belt surface in the longitudinal direction (2). In addition, the coefficient of friction in the lateral direction becomes larger than necessary.

As a result, even with such a plain-woven canvas belt, moving the conveyed object in the lateral direction is like moving it forcibly, and in this case, the conveyed object may fall over or the contents may be damaged. Otherwise, the belt surface will be worn out, resulting in a lack of durability.

(Purpose) The present invention aims to improve such drawbacks, and provides a belt that has a large longitudinal frictional resistance and a relatively small lateral frictional resistance, making it easy to move objects in the lateral direction. The purpose is to provide a belt with

(Structure) The present invention employs the following structure in order to achieve the above objects.

That is, it is a belt (3) for transporting articles and for laterally taking out articles or laterally supplying articles.・A plain weave is formed by warp yarns A running in the traveling direction and weft yarns B running at right angles to the warp yarns, and a twill weave is created by skipping multiple warp yarns A on the front surface side of the belt with weft yarns C. This belt is characterized by a woven canvas impregnated with resin, and allows objects to be transported to move easily in the lateral direction.The most distinctive feature is the use of a special double-woven canvas.

Regarding this point, for example, a plain weave is first formed using a multifilament as the warp thread A and a monofilament as the weft thread B, and then a plurality of warp threads A are formed on the side that will become the surface of the belt using a multifilament as the weft thread C. It has a double weave structure that is twilled while skipping, and the front side of this canvas has a twill weave structure with warp threads A and weft threads C, and the back side has a plain weave structure with warp threads A and weft threads B. It is something that exists.

Furthermore, in such a double weave structure, two weft yarns B and C are used, one of which is a plain weave formation in which the weft yarn B alternately passes through the warp yarn A, and the other (4) weft yarns C are the warp yarn A. The twill weave has a shape in which the warp yarns A are passed through after being skipped over a plurality of yarns.

A belt is formed by impregnating such a double-woven canvas with a suitable resin such as polyurethane.
By making the contact surface with the conveyed object the side where the weft threads C skip the warp threads A, smoothness in the transverse direction is imparted by the weft threads C. On the other hand, the back surface of the belt is smooth in the direction due to its plain weave shape. This is the reason why a belt having a canvas-like surface with almost no elasticity is obtained.

The present invention uses such a special canvas, and can be freely modified and added to the structure as a belt. For example, the belt can be formed with both the weft yarns B and C as monofilaments or multifilaments, and the warp yarns A Conductive fibers may be blended into the weft (in some cases, the weft as well).

When both wefts B and C are monofilaments, the abrasion resistance of monofilaments can be utilized, and relatively hard objects can be transported and sorted (5). On the other hand, if both the wefts B and C are made of multifilament, the belt will have a relatively smooth surface and will be used, for example, for conveying and sorting kutski etc.

In addition, the warp A is usually 500 denier (d/1) to 150 denier
A 0 denier (d/1) multifilament is used. This is appropriately selected according to the purpose of use while considering the strength of the belt.

Furthermore, this special canvas can be used as a basic unit for multi-layer belts with multiple plies; in this case, the special canvas of the present invention is used for the front ply, and ordinary plain-woven canvas is used for the other plies. It doesn't matter if there is.

The impregnated resin may also be polyurethane or polyurethane depending on the purpose of use.
Various materials such as silicone and fluororesin will be used.

(Function) In order to adopt the above-mentioned structure, the present invention makes the slipperiness (6) of the belt surface, which is important for various sorting belts, different in the vertical direction and the horizontal direction, and can be conveyed with relatively little slippage, the conveyed object slides smoothly in the lateral direction, and the conveyed object can be fed from the side in the direction of belt movement.
This makes it easier to carry out the bag, which prevents damage to the baggage inside and increases the durability of the belt.

(Example) FIG. 1 is a schematic diagram showing a canvas having a double weave structure used in the present invention.

The warp A is a multifilament of 1000 denier (d/1) (80 pieces/5 cm), the weft B is 0
．． Monofilament with a diameter of 3 mm (50 threads/5 cm), weft C is 1500 denier (d/1) (
It is a special double-weave canvas that uses multifilament (50 threads/5 cm) and these vertical and horizontal threads are woven together.

In the figure, part a is a part where six threads A, B, and C are woven.
Section b shows the lower layer woven with yarns A and B, excluding the weft C of the upper layer. (7) In the figure, "Country" indicates the warp A and its direction, and "Day" indicates the weft B.
, &'llF gigantic' indicate the weft C and its direction, respectively.

Figure 2 shows part a of Figure 1.
3 is a cross-sectional view of the Roro wire in part a of Figure 1, Figure 4 is a cross-sectional view of the line to the bar in part a of Figure 1, and Figure 5 is part a of Figure 1. FIG. 6 is a sectional view taken along the line 2-2 of FIG. 6, and FIG. 6 is a sectional view of the portion shown in FIG.

In FIGS. 2 to 6, "-Jl or ■T! λJ indicates warp thread A, [i'O,il indicates weft thread B, and 1 piece J indicates weft thread C."

As can be seen from these figures, in the lower layer of the canvas, that is, in the section b in Fig. 1, the warp threads A and the weft threads B alternately intertwine vertically to form a plain weave.

The purpose of this plain weave shape and this structure is that by making it a plain weave, there is no diagonal directionality as a conveyor belt, and when this becomes the bottom surface of the conveyor belt, the straight running property of the belt itself is (8) Furthermore, due to the presence of the weft threads B, the lateral rigidity of the bell 1 is maintained.

In the upper layer of the canvas, that is, in section a in Figure 1, the warp thread A
On the other hand, the weft thread C passes under the next sixth warp thread A after skipping five warp threads A, and the weft thread C in the next row shifts its skip position and passes under the warp thread A. It's also something to pass through.

As a result, a twill weave shape is formed in which the weft yarns C are floating (in a direction perpendicular to the warp yarns A, that is, perpendicular to the traveling direction of the belt).

The purpose of such a shape is that the weft C floats with a certain width, resulting in smoothness and directionality in the horizontal direction, which makes it possible to make the slipperiness in the horizontal direction greater than that in the vertical direction. This has become possible, and this is the greatest feature of the present invention.

The floating width of the weft C of this upper layer of canvas is 3 to 7 as a result of the experiment.
It has been found that a float width of about 1.5 mm is appropriate; if the floating width is narrow, there will be less skidding (and if it is too wide, even if it is impregnated with resin and made into a complete belt, the conveyed object will be damaged). Due to the relationship (9), the weft thread C is damaged and the thread becomes easily separated.

The belt of the present invention is made by impregnating the special double-woven canvas with polyurethane resin, etc.
In FIG. 7, such a belt cross section is shown with the cross section shown in FIG. 3.

In the figure, 1 indicates polyurethane resin.

Conveyance Experiment Here, in order to further demonstrate the features of the present invention, an experiment was conducted to measure the friction coefficient of the belt in the longitudinal and lateral directions and to examine the sorting performance using a cardboard box as the object to be conveyed. The experimental conditions were a friction surface pressure of lOg/crn'' and a belt speed of 2 m/min.

As for the conventional belt used as a comparative example, the warp yarn A of the present invention was used.
A canvas is made by hand-woven with weft yarns B and impregnated with various resins or laminated on the surface.

The results of this experiment are shown in Table 1.

Conventional product A has a polyurethane resin layer laminated on the surface with a thickness of about 012 mm, but the friction coefficient is large in both the vertical and horizontal directions of the belt (10), and the sorting operation is extremely difficult (10).

Conventional product 13 is impregnated with polyurethane resin, and the only difference from the present invention is that it does not use the weft thread C due to the structure of the belt, but the coefficient of friction in the longitudinal direction is slightly inferior, and the coefficient of friction in the transverse direction is slightly lower. The coefficient tends to be a little high. Sorting cardboard boxes is apparently possible.

Conventional product C is impregnated with silicone resin, but its coefficient of friction is too low. For this reason, in addition to the workability of sorting cardboard boxes, the conveyance function of the belt in the direction of movement is poor, and the belt may stop moving forward, making it unsuitable for use as a commercial belt.

On the other hand, as can be seen from the results in the table, the belt of the present invention has a significantly different coefficient of friction in the vertical direction and friction coefficient in the lateral direction, and the desired belt properties can be obtained. It has also been demonstrated that the belt has much better workability than conventional belts.

The belt shown in FIG. 8 is a modified example of the belt of the present invention, and is a belt in which a urethane resin layer 2 of about 0.2 mm is formed on the lower surface of the belt shown in FIG. It is used when driving.

Furthermore, the belt shown in FIG. 9 is a so-called two-ply belt, in which another ply of plain weave canvas is integrated with the lower surface of the belt shown in FIG. 7. 3 in the figure is a polyurethane resin layer of about 02 mm interposed in the middle.

As in this example, the canvas located in the lower layer of the multilayer belt adds other characteristics and functions as a belt in addition to the characteristics of the present invention such as strength, rigidity, running performance, and low noise. . This will depend on the arbitrary selection of the intermediate resin layer, the lower resin layer, material, thickness, surface shape of the negative layer, etc.

In the above, when constructing the belt of the present invention, polyurethane resin has been described as the resin to be impregnated, but the resin to be impregnated can also be selected from various types depending on the purpose.

(13) For example, in some catering lunchbox factories, there is a line that takes out the rice horizontally while it is being transported.

For this purpose, a urethane-impregnated belt is impregnated with silicone resin, which has excellent non-adhesive properties, since rice adheres to the belt and makes it difficult to work with. This makes it possible to move a fixed amount of rice quickly or mechanically laterally, and to pack lunches along the belt. Work becomes easier.

In addition, under high temperature conditions (for example, 150°C or higher), there is a so-called fluorine belt, which is a canvas made of glass fiber or aramid fiber and impregnated with fluorine. This is effective in transporting rubber (mainly tire tread rubber) immediately after extrusion and in moving and taking it out in the lateral direction.

Furthermore, in the proposed belts 1~ impregnated with PVC resin, the belt surface becomes relatively soft 1~, and at the same time, the coefficient of friction is higher (14) than that of belts impregnated with urethane. Using this feature, it is effective for transporting and sorting objects that are extremely slippery, such as polypropylene and polyacetal resin containers.

As yet another example, when sorting electronic components, significant antistatic protection is required. Here, conductive fibers may be insufficient, and the problem can be solved by impregnating the canvas structure of the present proposal with conductive urethane resin mixed with carbon, for example.

In addition, as mentioned above, it goes without saying that the most suitable impregnating resin is selected depending on the object.

(Effects) As explained above, the present invention has a structure that allows objects to be conveyed to easily slide in the lateral direction of the belt, thereby making it possible to provide a belt that has more functionality and durability than conventionally used belts. It is used for various sorting and supply belts and has high utility value.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing a canvas having a double weave structure used in the present invention, Fig. 2 is a cross-sectional view taken along the line a of Fig. 1, 3 is a cross-sectional view of the Rollo line in part a of Figure 1, Figure 4 is a cross-sectional view of the line to the bar in part a of Figure 1, and Figure 5 is a cross-sectional view of line 2-2 in part a of Figure 1. Fig. 6 is a sectional view taken along the Hoch line of the part shown in Fig. 1, and Fig. 7 is a bell of the present invention!・An embodiment of the belt, in which FIG. 3 is a cross-sectional view of a belt similar to that shown in FIG. 3, FIG. 8 is a modified cross-sectional view of the belt of the present invention, and FIG. FIG. 2 is a cross-sectional view of a belt integrated with a plain-woven canvas. A... Warp B, C... Weft 1.2.3... Polyurethane resin

Claims (1)

[Claims] (1) A belt that conveys articles and is used for taking out articles in the lateral direction or for supplying articles from the lateral direction, in which the warp yarn A runs in the direction of movement of the belt, and the weft yarn B runs at right angles thereto. to form a plain weave, and further weft C
A belt capable of easily moving a conveyed object in the lateral direction, characterized in that canvas having a double weave structure is made by skipping a plurality of warp threads A on the front side of the belt and twill weaving, and impregnating a resin with resin.