JPS60178110A - Belt conveyer device - Google Patents

Abstract

PURPOSE:To provide a belt conveyer device capable of reducing damages of belt teeth, belt tooth bottoms and belt core wires by pressing continuously smoothly the belt teeth with a pressurizing pulley without contacting the belt tooth bottoms on the teeth of the pulley. CONSTITUTION:A pair of toothed belt 1 travelling while sandwiching articles 3 to be transferred between opposed belt backs 12 formed with liear grooves 11 are provided. Also, a plurality of pairs of pressurizing pulleys 2 for sandwiching and pressing the toothed belt 1 from the tooth face side are provided. And the tooth height of said pulley 2 is smaller than that of the toothed belt 1, and the contact portion of the pressurizing pulley 2 with the toothed belt 1 is provided with a proper curvature. Thus, the pressurizing pulleys 2 press smoothly continuously the belt teeth without contacting the tooth bottom of the toothed belt 1 on the tooth end of the pulley. Thus, the damages of the belt teeth, belt tooth bottoms and belt core wires can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a belt conveyor device for pulling or feeding electric wire cables, round bars, pipes, square timbers, etc., and particularly to a belt conveyor device with excellent durability.

PRIOR TECHNOLOGY The work of pulling and feeding out conveyed objects such as electric wire cables, round bars, pipes, and square timbers is carried out by pulling and feeding the conveyed objects 100 from above and below or from the left and right, as shown in FIGS. 1 and 2. This is done by applying pressure in a sandwich shape with the flat belt 102 and utilizing the frictional force generated at that time.

However, in the roller or flat belt system, the speeds of rollers or flat belts that are arranged opposite to each other are inevitably different, which causes friction scratches on the conveyed object. Moreover, in the roller method, each pair of rollers is independent from the other pair of rollers.

Continuous pressure cannot be applied to the transported object, and

Rollers must be placed in all directions.

In the flat belt method, the flat belt easily stretches over time,
Therefore, maintenance must be performed frequently and the maintenance work is complicated. In order to solve this problem, a method using a toothed belt has been proposed. In this toothed belt system.

Because opposing toothed belts run synchronously.

The surface speed of both belts is constant and there is no friction damage to the conveyed object. However, in this method, as shown in FIG.
The tooth top portion 105 of pulley No. 04 strongly presses the belt tooth bottom portion 106. Therefore, the core wire 107, which is disposed closely to the belt tooth bottom portion 106, is severely damaged. The canvas 108 near the belt tooth bottom 106 is also severely damaged.
As a result, the life of the toothed heald 103 is extremely short.

An object of the present invention is to prevent damage to the belt teeth, the belt tooth bottom, and the belt core wire by having the pressure pulley smoothly and continuously press the belt teeth without the teeth coming into contact with the belt tooth bottom. The purpose is to provide a belt conveyor device that can be minimized. Another object of the present invention is to provide a belt conveyor device in which the durability of the toothed belt can be improved by forming the pulley teeth and the bottom of the pulley teeth into a unique shape. Another object of the present invention is to provide a conveyor belt that does not cause frictional scratches on conveyed objects.

Light Plate ■Next Day 1 The belt conveyor device of the present invention consists of a pair of toothed belts that run while sandwiching the conveyed object in a sandwich-like manner on the back surfaces of opposing belts, and a toothed belt that grips the toothed belt from the tooth surface side. a plurality of pairs of pressure pulleys that press while pressing, the height of the teeth of the pulley is lower than the height of the teeth of the belt, and the contact part of the pulley with the belt teeth has an appropriate curvature, In addition, the pulley smoothly and continuously presses the belt teeth without bringing the tooth tips into contact with the bottom of the belt teeth, thereby achieving the above object.

The material and tooth shape of the toothed belt used in the device of the present invention do not need to be special at all. The belt.

For example, highly durable styrene-butadiene rubber (
The back of the belt made of SBR) or chloroprene rubber (CR) is formed in close contact with the core wire, and belt teeth made of the same rubber are integrally formed with the back of the core wire surface. The belt teeth are covered with nylon canvas to reduce wear.

The tooth shape of the heald mainly includes a round shape as shown in FIG. 4 and a trapezoid shape as shown in FIG.

The pressure pulleys that engage and press these toothed belts have a boolean tooth height that is lower than the belt tooth height and 9, as shown, for example, in FIGS. 6 and 7.

Every part of the contact between the pulley and the belt teeth has an appropriate curvature. The following equation (1) holds between the pulley tooth height hp and the belt tooth height hb. If Kh is extremely small, the pulleys will not properly engage the belt teeth and will not function satisfactorily as a conveyor belt device. If Kh is extremely large, the pulley teeth will come into contact with the bottom of the belt teeth, damaging the belt.

hP = hb - Xh - (1) Here, Kh is a numerical value of 0.05 to 0.9.

Pulley tooth bottom diameter 1? D needs to satisfy the following formula (2).

RD= [P-N/π-2(hb+t)] io-+
2) Here, P is the belt tooth pitch (distance between belt teeth).

N is the number of teeth on the pulley.

π is pi.

) Ill is the belt tooth height.

t is from the bottom of the belt tooth to the center of the belt core line distance to the center.

Ko is a value between 0.9 and 1.3.

When the toothed heddle is round, as shown in Fig. 8, the groove bottom radius Rp of the pulley that presses it, ``a radius at the inflection point from the bottom to the tooth side r l r r from the tooth side to the tooth The radius r2 of the curved portion leading to the tip and the radius Ro of the tooth tip have the relationships shown in the following equations (3) to (6).Whether Rp becomes too small or too large, the pulley and belt teeth will not move smoothly and Continuous securing is not possible.If rl and r2 are too small, the belt will be easily damaged.

If it becomes too large, proper engagement between the pulley and belt cannot be achieved.

Rp=I? b-Kb...(3) I here? b is the radius of the belt tooth tip.

Kb is a numerical value of 1.0 to 3.0.

Ro = 0O-Kp - (41 Here, 00 is the outside diameter of the pulley.

Kp8ctO, numerical value of 01-0.5.

rl ” Numerical value from 0.2 to 7 am. -+5)rt=
Values from 0.2 to 71. (6) When the toothed belt is trapezoidal, as shown in Fig. 9, the groove bottom radius Rd of the pulley that presses it, the radius ri at the inflection point from the groove bottom to the tooth side + from the tooth side Radius of the curved part leading to the tooth tip r4 + tooth side extension line at both ends of the groove bottom and radius of the groove bottom R
The distance d between the intersections with d, the tooth tip radius Rs, and the pressure angle θ of the pulley with respect to the belt have the relationships shown in the following equations (7) to (12).

1? If d and θ become too small or too large, smooth and continuous engagement between the pulley and the belt teeth will not be possible. If r and r4 are too small, the belt will be easily damaged; if they are too large, the pulley and belt will not be properly secured.

Rd=RD-Kp...(7) Here, RD is the diameter of the bottom of the pulley tooth.

Kp is a numerical value of 0.01 to 0.5.

d=do-Kd-(81 Here, do is the belt tooth tip width.

Kd is a numerical value of 1.1 to 1.5.

Rs = 0O-Kp +・(91 Here, 00 is the pulley outer diameter.

Kp is a numerical value of 0.01 to 0.5.

, rs=0.2~7■■...(10)r4=
0.2~7 Seal ■... (11) θ-θo -K
d...(12) Here, 00 is the belt pressure angle.

Kd is a numerical value of 1.1 to 2.0.

As the pressure pulley that engages with the trapezoidal toothed belt, the pulley shown in FIG. 10 whose groove bottom has a concave curve can be used instead of the pulley shown in FIG. 9 whose groove bottom has a convex curve. In this case as well, it is necessary to have the relationships expressed by the above equations (7) to (12). The pulley outer diameter OD is the sum of the tooth bottom diameter RD and twice the pulley tooth height hp.

Although the teeth of the toothed belt have been described as round and trapezoidal, the toothed belt is not limited to typical round and trapezoidal teeth. Belts with convex tooth side surfaces Helds with concave tooth side surfaces and belts with linearly sloped tooth side surfaces are also appropriately classified into round and trapezoidal shapes, and the above formula is applied to these belts. Although the shape of the tooth tip may be a horizontal straight line, a convex curve, or a concave curve, the shape of the tooth tip does not greatly affect the purpose and effect of the present invention.

Example The present invention will be described below with reference to Examples.

Toothed heald 11th +al and 11th fb
A belt 1 with round teeth as shown in FIG. 1 was used. This toothed belt 1 was made of chloroprene rubber, had a belt length of 3,500 mm, a belt tooth pinch of 141 mm, a belt width of 85 mm, and a back rubber thickness of 14 fins. A groove 11 is provided on the back surface of each toothed heald.

The groove depth is 101. The groove radius is 17 dragons. The pulley 2 that presses the toothed belt 1 has 18 teeth, and as shown in FIG. 12, the pulley tooth height hp is 3.3.
m, tooth root diameter RD is 69.65 mm, tooth tip radius Ro
is 2.5+u5. The groove bottom part radius Rp is 5N.

As shown in FIG. 13, the heald conveyor device of the present invention includes the above-mentioned pair of opposing toothed healds 1, and the cable 3 is held in a sandwich-like manner by the back surface 12 of each belt.
The durability of the toothed belt is examined by applying pressure and tension using a plurality of the pressure pulleys 2. At this time, the belt speed (1) is 230 m/min, the pressing force W by the pressure pulley 2 is 100 kgf, the cable diameter is 40 m/min, and.

Cable tensile force F was 500 kgf.

As a comparative example, a similar experiment was conducted using a toothed belt 6 and a pressure pulley 7 having a standard shape as shown in FIG. The toothed heald was made of chloroprene rubber, and the back rubber thickness was 4N. There are no grooves on the back.

In the toothed heald in the comparative example, damage was observed in the tooth bottom and the tooth side fabric at 1 & IO hours from the start of the experiment, and damage such as longitudinal tearing of the heald also occurred. On the other hand, in the toothed belt of the apparatus of the present invention, no abnormality was observed in any of the belt teeth, the bottom of the belt teeth, or the belt core even after 200 hours of testing. It has been found that the device of the invention significantly improves the durability of toothed belts. Further, no friction damage was observed on the cable, which was the object to be transported in this example. The device of the present invention was also shown to be effective in ensuring good running of the conveyed object due to the constant speed provided by the stabilization of the toothed belt.

In the belt converter device of the present invention, the pressure pulley smoothly and continuously presses the belt teeth without bringing its teeth into contact with the bottom of the belt teeth, thereby removing the belt teeth, the bottom of the belt teeth, and the bottom of the belt teeth. To minimize damage to belt core cotton. In addition, by forming the pulley teeth and the pulley tooth bottom into a unique shape, the durability of the toothed belt could be significantly improved.

As a result, the constant speed provided by the stabilization of the toothed heald reduces the occurrence of friction scratches on the conveyed object despite being subjected to a large pressurizing load. As described above, according to the present invention, it is possible to provide a belt conveyor device that maintains excellent durability and stability.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views and front views of main parts of a conventional roller type and flat belt type tensioning or feeding device, respectively, and Figure 3 is a front view of the main part of a conventional toothed heddle type tensioning or feeding device. Figures 4 and 5 are side views of essential parts showing an example of a belt having round teeth and trapezoidal teeth that engage with the pulleys of the apparatus of the present invention, and Figures 6 and 7 are respectively of the present invention. FIG. 3 is a side view of a main part showing an example of a state in which the round-toothed and trapezoidal-toothed pulleys of the device are engaged with the belt teeth that engage with the pulleys; Fig. 8 is a side view of essential parts showing an example of a belt with round teeth of the present invention and a pulley fitted thereto, and Fig. 9 shows a heddle with trapezoidal teeth of the present invention with a convex groove bottom. FIG. Fig. 10 is a side view of a main part showing an example of a trapezoidal toothed pulley with a concave groove bottom, Fig. 11fa1 is a perspective view of a main part showing an example of a toothed belt used in the present invention, and Fig. 11f
Figure b1 is a sectional view perpendicular to the longitudinal direction of the heald, and Figure 12 is a side view of essential parts showing an example of the pulley of the present invention. FIG. 13 is a front view showing an example of a heald control device according to the present invention, and FIG. 14 is a side view of essential parts of a hammer-toothed heald and a pulley used as a comparative example of the present invention. 1...Toothed con-hair held, 2...Pressure pulley. 3... Cable, 4... Drive pulley, 5... Prime mover, 6... Standard shape con hair heald, 7... Standard shape pulley, 11... Heald groove, 12... Heald Rear side, 100...To be transported, 101...Roller, 102...Flat heald 103...Mounted heald,
104...Pressure pulley, 105...Pulley tooth top,
106... Heald tooth bottom, 107... Heald core wire,
108... Canvas Figure 1 Figure 27 Figure 3 Figure 4 Figure 5 Figure 8 Figure 9

Claims (1)

[Scope of Claims] 1. A pair of toothed belts that run while sandwiching the conveyed object in a sandwich-like manner between the opposing heald back surfaces, and a plurality of pairs of toothed belts that press the toothed belt while sandwiching it from the tooth side. a pressure pulley, the height of the teeth of the pulley is lower than the height of the teeth of the heald, the contact portion of the pulley with the belt teeth has an appropriate curvature, and the tooth tip of the pulley has a moderate curvature. A belt conveyor device that smoothly and continuously presses the belt teeth without contacting the bottom of the acid heald teeth. 2. The device according to claim 1, wherein the pulley has a pulley tooth height hp and tooth root diameter RD expressed by the following equations (11 and (2); hp = hb - Kn - fl) and hb is the belt tooth height. Kn is a numerical value of 0.05 to 0.9. RD= [P −N/π−2Chb+t) 1 ・KO
...(2) Here, P is the belt tooth pitch. N is the number of teeth on the pulley. π is pi. hb is the belt tooth height. t is the distance from the bottom of the belt tooth to the center of the belt core line. Ko is a value between 0.9 and 1.3. 3. The device according to claim 1 or 2, wherein the teeth of the belt are round. 4. The groove bottom radius Rp of the pulley, the radius rI at the inflection point from the groove bottom to the tooth side + the radius r2+ of the curved part from the tooth side to the tooth tip, and the tooth tip radius Ro are expressed by the following formula (3
) to (6); Rp=Rh −Kb (3) where Rh is the radius of the belt tooth tip. Kb is a numerical value of 1.0 to 3.0. Ro=OD-Kp, -(4) where OD is the pulley outer diameter. Kp is a numerical value of 0.01 to 0.5. r, = 0.2 to 7 u+ value. ...(5) r z
= Numerical value from 0.2 to 7 am. - 1615, the device according to claim 1 or 2, wherein the teeth of the belt are trapezoidal. 6. The groove bottom radius Rd of the pulley, radius r3 at the inflection point from the groove bottom to the tooth side + radius r4 of the curved part from the tooth side to the tooth tip + on the tooth side extension line at both ends of the groove bottom and the groove bottom Intersection distance d with radius Rd. The apparatus according to claim 5, wherein the tooth crest radius Rs and the pressure angle θ of the pulley with respect to the belt have the relationships expressed by linear equations (7) to (12);
(7) Here, RD is the diameter of the bottom of the pulley tooth. Kp is a numerical value of 0.01 to 0.5. d = do-Kd -+81 where do is the belt tooth tip width. Kd is a numerical value of 1.1 to 1.5. Rs=OD-Kp...(9) Here, 00 is the pulley outer diameter. Kp is a numerical value of 0.01 to 0.5. r z -0,2~7 *Cao -(10) r4-0.
2~7IIm... (11) θ=θo -KO...
・(12) Here, 00 is Heald pressure angle. KO is a number between 1.1 and 2.0.