JPH11299323A - Conveyor belt - Google Patents

Abstract

(57) [Summary] [Problem] Two transport belts 1 and 2 having the same sectional structure
Is wound around the pulleys 11 and 12 so that the parallel portions 1a and 2a that are partially parallel to the mating belts 2 and 1 and that are in contact with the outer surface are formed, and the two belts 1 and 2 are the same in opposite directions. A transport device A that travels at a speed and pulls out and transports the plant P from the ground while holding the plant P between the parallel portions 1a and 2a.
In the above, when the plant body P is pulled out, the cushion body 5 joined to the belt main body 3 of each of the belts 1 and 2 is prevented from being damaged by interference with surrounding parts when the cushion body 5 is deformed in the belt width direction by the force from the plant P. Prevents the belts 1 and 2 from being damaged prematurely. SOLUTION: In a state in which a plant P is not sandwiched, both side surfaces 5a, 5b in the belt width direction of the cushion body 5 are shifted toward the center side in the belt width direction from both side surfaces 3a, 3b of the belt body 3 in the belt width direction. The widthwise side surfaces 5a and 5b of the cushion body 5 deformed in the width direction are prevented from protruding from the belt body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport belt for transporting a conveyed object such as a plant between its outer surfaces with a counterpart belt traveling at the same speed and in the same direction.
In particular, it belongs to the technical field for preventing early breakage of the cushion body on the outer surface side.

[0002]

2. Description of the Related Art Conventionally, as a transporting device using a transporting belt of this kind, for example, as shown in Japanese Patent Publication Nos. 59-21299 and 3-100208, Japanese Utility Model Publication No. 2. Description of the Related Art There is known an apparatus mounted on a plant harvester for harvesting plants to automate the harvesting operation. In this apparatus, two conveyor belts having the same cross-sectional structure are wound around a pulley so as to be partially parallel to a counterpart belt and to form a parallel portion that is in contact with the outer surface. Are run in opposite directions at the same speed, the moving direction and the moving speed of the parallel portions of both belts are the same, and plants (conveyances) such as rushes are taken in between these parallel portions, and the belt is run. Plants are pulled out of the ground and transported.

[0003]

The above-mentioned conveyor belt has a belt body whose inner surface is wound around a pulley, and a cushion body joined to the outer surface of the belt body and whose outer surface comes into contact with plants. . Normally, the side surfaces of the cushion body and the belt body in the belt width direction are formed of planes substantially parallel to the belt thickness direction, and the side surfaces of the cushion body and the belt body in the belt width direction are formed flush with each other. Have been.

However, in this structure, when the plant is sandwiched between the outer surfaces of the cushions of the two belts and pulled, the cushion is conversely pulled from the plant and deformed, and the side in the belt width direction is the belt width of the belt body. It may protrude from the side surface in the direction (see the phantom line in FIG. 2). In particular, when the cushion body is a soft sponge, the amount of protrusion due to its deformation is large. A cushion body projecting from the belt main body is provided with a flange for preventing belt slippage or meandering, which is circumferentially or wholly or partially provided on both sides in the belt width direction of the outer peripheral surface of the conveyance pulley, or a belt outer surface (cushion). The outer surface of the body) and the guide pulley, which guides the outer surface of the body and guides the same, or the machine frame around the belt, which is likely to be damaged, and damage to the cushion body may cause early damage of the belt. there were.

For this reason, it is necessary to set the height of the belt for preventing the belt from coming off or meandering in the conveying pulley to be equal to or less than the thickness of the belt main body. There is also a problem that the effect cannot be obtained well.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to improve the structure of a cushion body in the above-mentioned conveyor belt so that the cushion body is subjected to force from a conveyed object such as a plant. Even if deformed, the belt width direction side surface does not protrude from the same side surface of the belt body, thereby preventing damage to the cushion body due to interference with other parts of the belt and preventing early damage of the belt. is there.

[0007]

In order to achieve the above object, according to the present invention, a side surface in a belt width direction of a cushion body in a conveyor belt is shifted to a center side in a belt width direction of a belt body. , On the inclined surface inclined toward the center in the belt width direction.

More specifically, according to the first aspect of the present invention, the inner surface of each of the pair of conveying belts wound around the conveying pulley is partially parallel to the mating belt and is in contact with the outer surface of the pair of conveying belts. A parallel part running at the same speed in the direction is provided,
A belt body whose inner surface is wound around a transport pulley, as the transport belt used for a transport device for transporting a transported object such as a plant between the parallel portions,
A cushion body joined to an outer surface of the belt body, the outer surface of which comes into contact with a conveyed object; at least one of the side surfaces in the belt width direction of the cushion body is closer to the center in the belt width direction than the corresponding side surface of the belt body in the belt width direction. The configuration is shifted to

With the above construction, the side of the cushion body in the belt width direction is shifted to the center side in the belt width direction from the corresponding side surface of the belt body, so that the cushion body is acted on by the force of the conveyed object such as plants. Even if it is deformed in the belt width direction, the side surface in the belt width direction does not protrude from the belt body, and the cushion body can be prevented from interfering with members around the belt and being damaged, and early damage of the belt can be prevented. Can be prevented. For this reason, the height of the belt for preventing belt slippage or meandering in the transport pulley can be set to be larger than the thickness of the belt main body, and the belt slippage preventing effect and the meandering preventing effect by the flange can be obtained satisfactorily.

[0010] In the second aspect of the present invention, the amount of deviation between the side surface in the belt width direction of the cushion body and the side surface in the belt width direction of the belt body in the conveyor belt is 0.5 to 5 mm.
In this case, a desired range of the amount of displacement between the side surfaces of the cushion body and the belt body in the belt width direction can be obtained. That is, if the displacement amount is less than 0.5 mm, the effect of preventing damage caused by the interference of the cushion body becomes insufficient. On the other hand, if the displacement amount exceeds 5 mm, the effect of holding and transporting the conveyed article by the cushion body is good. 0.5
A range of ５5 mm is desirable.

According to a third aspect of the present invention, as a transport belt used in the transport apparatus similar to the first aspect of the present invention, a belt body whose inner surface is wound around a transport pulley, and which is joined to an outer surface of the belt body, A cushion body having an outer surface in contact with a conveyed object, wherein at least one of the side faces in the belt width direction of the cushion body is formed of an inclined surface inclined toward the outside of the belt toward the center in the belt width direction. And

In the present invention, even if the cushion body is deformed by the force of the conveyed object, the side surface in the width direction of the belt formed by the inclined surface does not protrude from the belt main body, thereby preventing early damage of the belt and conveying the belt. By increasing the height of the flange of the pulley, a belt separation preventing effect and a meandering preventing effect can be obtained satisfactorily.

According to a fourth aspect of the present invention, at least one of the side faces in the belt width direction of the cushion body in the transport belt of the third aspect is shifted toward the center in the belt width direction from the corresponding side face in the belt width direction of the belt body. Configuration. This makes it more difficult for the side surface in the belt width direction of the cushion body to protrude further from the belt main body, and it is possible to more effectively obtain the effect of preventing the belt from being damaged early and the effect of preventing the belt from coming off and meandering due to the flange of the transport pulley. .

According to the fifth aspect of the present invention, the third or fourth aspect is provided.
When the side of the cushion body in the belt width direction is inclined, the inclination angle of the side of the cushion body in the belt width direction with respect to the belt thickness direction is 10 to 30 °.
And In this case, a desirable range of the inclination angle of the side surface in the belt width direction of the cushion body can be obtained. That is, when the inclination angle is smaller than 10 °, the effect of suppressing the protrusion from the belt body due to the deformation of the cushion body is small. On the other hand, when the inclination angle exceeds 30 °, the effect of holding and transporting the conveyed object by the holding of the cushion body is insufficient. The inclination angle is set to 10 to 30 °.

According to a sixth aspect of the present invention, in the conveying belt of the first aspect, at least one of the side surfaces of the cushion body in the belt width direction, which is connected to the belt main body, has a belt width that is closer to the belt main body. It is configured such that an arc-shaped surface having an arc-shaped cross section that curves outward in the direction is formed.

According to this configuration, when a conveyed object is conveyed between cushion bodies in parallel portions of both belts, even if the cushion bodies of the respective belts are deformed in the belt width direction, the belts on the side surfaces in the belt width direction are formed. By preventing stress concentration on the joint part side with the main body, the cushion body can be hardly peeled off from the belt main body, large deformation of the cushion body due to this peeling is suppressed, and the belt's ability to clamp the transported object is kept large, In addition, breakage of the cushion body can be prevented.

In the invention according to claim 7, the cushion body of the conveyor belt is made of foamed sponge. In this case,
A desirable embodiment of the cushion body is obtained.

According to an eighth aspect of the present invention, in the transport belt according to the seventh aspect, the cushion body and the belt body have a structure in which a sponge is integrally vulcanized and joined to an unvulcanized belt body. . As a result, the sponge itself is slightly deteriorated by the heat at the time of vulcanization. Adhesion is also stable. In addition, the adhesive portion cannot be determined from the outside, and the appearance of the belt can be improved.

According to the ninth aspect of the present invention, the above-mentioned claim 7 or 8 is provided.
A skin layer is provided on the outer surface of the cushion body in the conveyor belt of (1). Thus, the wear resistance of the outer surface of the cushion body made of sponge can be improved.

[0020]

(Embodiment 1) FIG. 3 schematically shows a transfer apparatus A according to Embodiment 1 of the present invention when viewed from above. As shown in FIG. 2, the transport device A is a plant harvester (a plant harvester for extracting and automatically harvesting plants P (transported materials) such as ginseng, radish, burdock, potatoes, etc. planted on the ground. (The whole is not shown).
Two belts 1 running on a stalk P1 on the surface of
The plant P is pulled out by being pinched and pulled between the two.

The transfer device A includes a left transfer belt 1 (a left transfer belt 1 shown in FIG. 3) wound around first to third three left transfer pulleys 11, 11,... Having a substantially vertical axis. ) And the first to fourth four right-side transport pulleys 12, 12,... Having a substantially vertical axis and located to the right of the left-side transport pulleys 11, 11,. The belts 1 and 2 have a right side conveying belt 2 (the right side belt in FIG. 3). 3 and the right belt 2 at the same speed in the counterclockwise direction.

Further, the three left conveying pulleys 11, 1
A left guide pulley 16 is provided between the first and third two left transport pulleys 11 located at the front end (the upper end in FIG. 3) and the left end of the right transport pulley 1.
A right guide pulley 17 is disposed between the first and fourth right transport pulleys 12 located at the front end and the right end of the guide pulleys 1, 2,.
The belts 6 and 17 guide the respective belts 1 and 2 by contacting the outer surface (transport surface) thereof.

.. Between the right and left outer pulleys 11, 11,... Disposed on the right side of the first and second two leftward pulleys 11, 11,. , ..., which is located on the left
The planes passing through the left outer peripheral edges of the second two right conveying pulleys 12 and 12 are arranged so as to be close to and parallel to each other. The front-rear distance between the first and second left transfer pulleys 11, 11 is greater than the front-rear distance between the first and second right transfer pulleys 12, 12.
Further, the first left transport pulley 11 and the first right transport pulley 12 are arranged corresponding to left and right. The pair of transport belts 1 and 2 include a portion located between the first and second left transport pulleys 11 and 11 and the first and second right transport pulleys 12 and 12, Parallel portions 1a, 2a are provided which are partially parallel to the mating belts 2, 1 and contact the mating belts 2, 1 on the outer surface and run in the same direction and at the same speed.
The stem P1 of the plant P is taken in between the two parallel portions 1a, 2a from the position between the first left conveying pulley 11 and the first right conveying pulley 12, and is pinched. The plant P is pulled out of the ground by being conveyed to the rear side by synchronous rotation.

Each of the transport pulleys 11 and 12 has the same structure except that the pulley diameters are different. As shown in FIG. 4, a substantially V-shaped section having a predetermined depth is provided at the center of the outer peripheral surface in the pulley width direction (the center in the vertical direction). A guide groove 13 is formed continuously over the entire circumference of the pulley, and a pair of upper and lower flanges 14 and 14 having a predetermined height for preventing the belt from coming off or meandering are provided at both ends in the width direction of the pulley. The projection is partially provided (or may be the entire circumference). In addition, each guide pulley 16, 17
As shown in FIG. 5, a pair of upper and lower flanges 18 and 18 for preventing the belt from coming off or meandering at a predetermined height are provided at both ends in the pulley width direction on the outer peripheral surface, as shown in FIG. Flanges 14 and 1 of each of the transport pulleys 11 and 12
4 and the flange 1 of each guide pulley 16, 17
The distance between the belts 8 and 18 is the same, and is set to the width of the belts 1 and 2 (the belt body 3 described later in detail).

The left and right conveyor belts 1 and 2 have the same structure except that the belt lengths are different.
As shown in enlarged detail in FIG.
And a cushion body 5 that is joined to the outer surface of the belt body 3 so that the center of the belt body 3 in the width direction of the belt is aligned, and the outer surface contacts the stem P1 of the plant P (conveyed material). And a jacket 6 joined to the inner surface of the belt body 3. The belt body 3 is, for example, C
It is made of R rubber (chloroprene rubber), and its width is the same as each dimension between the flanges 14 and 14 of the transport pulleys 11 and 12 and between the flanges 18 and 18 of the guide pulleys 16 and 17. Inside the belt main body 3, a plurality of (for example, two to three) layers of a slender layer 7 made of nylon, PET, or the like are formed. A substantially V-shaped ridge 4 made of NR rubber (natural rubber) extending in the belt length direction over the entire length direction of the belts 1 and 2 is integrally formed at the center of the inner surface of the belt body 3 in the belt width direction. The protrusions 4 are formed in the guide grooves 13 on the outer periphery of each of the transport pulleys 11 and 12.
Each of the conveyor belts 1 and 2 is transported by
It runs around 1,12.

On the other hand, the cushion body 5 is made of a foamed sponge having a substantially rectangular cross section having bubbles (closed cells or open cells), and the outer corners are arc-shaped. As the cushion body 5, for example, a sponge hardness meter based on SRISO0101 having a hardness of 13 to 50 ° is used. When the plant P is transported, the cushion body 5 comes into contact with the outer surface of the cushion body 5 of the partner belts 2 and 1 without any gap. The stem P1 of the plant P is sandwiched between the cushion bodies 5 and 5 so as not to be damaged. The cushion body 5 and the belt main body 3 are joined by integrally vulcanizing the sponge with the unvulcanized belt main body 3.

Both side surfaces 3a and 3b of the belt body 3 in the belt width direction and both side surfaces 5a and 5b of the cushion body 5 in the belt width direction are planes parallel to the belt thickness direction. It is constituted by a plane substantially perpendicular to the outer surface. Then, in a state where the belts 1 and 2 do not hold the plant P (conveyed material), the belt width L2 of the cushion body 5 is smaller than the belt width L1 of the belt body 3 (L2 <L1). As a result, both side surfaces 5a and 5b of the cushion body 5 in the belt width direction are shifted toward the center side in the belt width direction from the corresponding both side surfaces 3a and 3b of the belt body 3 in the belt width direction. The shift amount t between the side surfaces 5a and 5b and the side surfaces 3a and 3b in the belt width direction of the belt body 3 is set to t = 0.5 to 5 mm. In other words, if the displacement amount t is less than 0.5 mm, the effect of preventing damage to the cushion body 5 described below will be insufficient, while if it exceeds 5 mm, the effect of pulling out the plant P by the cushion body 5 will be favorably obtained. Disappears, so t =
It is set in the range of 0.5 to 5 mm.

Therefore, in this embodiment, when the plant P is harvested by the plant harvester, the left conveyor belt 1 of the conveyor A is moved between the left conveyor pulleys 11, 11,.
In addition, the right conveying belt 2 is connected to the right conveying pulleys 12, 12,.
.. Between the belts 1, 2 while being guided by guide pulleys 16 and 17, respectively.
In 2a, the vehicle travels backward in the same direction and at the same speed as the partner belts 2, 1. Then, as shown in FIG. 2, the position between the first left transport pulley 11 and the first right transport pulley 12 between the cushion bodies 5 and 5 in the parallel portions 1a and 2a of the belts 1 and 2 is shown. The stem P1 of the plant P is sandwiched and conveyed, whereby the plant P is pulled upward and backward and pulled out from the ground.

In this case, when the stem P1 of the plant P is sandwiched between the cushions 5 and 5 of the left and right belts 1 and 2, the cushions 5 are deformed downward in the belt width direction by resistance from the plant P. I do. However, in this embodiment, both side surfaces 5a and 5b in the belt width direction of the cushion members 5 are shifted toward the center in the belt width direction with respect to the side surfaces 3a and 3b of the belt body 3, so that the cushion members 5 are formed as described above. Even if the belt 5 is deformed to the lower side in the belt width direction, the lower side surface 5a in the belt width direction does not protrude downward beyond the lower side surface 3a of the belt body 3 (the phantom line in FIG. This shows a conventional example in which the side surface in the belt width direction of the body is flush with the same side surface of the belt body). For this reason, the deformed cushion body 5 is provided with upper and lower flanges 14, 14 for preventing the belt from coming off or meandering in the transport pulleys 11, 12.
The belts 1 and 2 are not damaged by interference with members around the belts 1 and 2 (for example, the case of the transporting device A), thereby preventing the belts 1 and 2 from being damaged early.

Since the side surfaces 5a and 5b in the belt width direction of the cushion body 5 do not protrude outward in the belt width direction from the side surfaces 3a and 3b of the belt body 3, the transport pulley 1
The height of the upper and lower flanges 14, 14 may be set higher than the thickness of the belt body 3. As a result, the belt pull-off preventing effect or the meandering preventing effect by the flanges 14 of the transport pulleys 11 and 12 can be favorably obtained.

Further, as shown in FIG.
Is also guided by the guide pulleys 16 and 17 respectively, the cushion body 5 of each belt 1 and 2 is compressed from the guide pulleys 16 and 17 and deformed. But,
Even if the cushion body 5 is deformed by being pressed by the guide pulleys 16 and 17 in this manner, the side surfaces 5a and 5b in the belt width direction of the cushion body 5 are the same side surfaces 3a and 3b of the belt body 3 for the same reason as described above. Of the guide pulleys 16 and 17 does not come into contact with the upper and lower flanges 18 and 18 for preventing the belt from coming off or meandering.

In particular, when the deviation t between the side surface 5a (or 5b) of the cushion body 5 in the belt width direction and the side surface 3a (or 3b) of the belt body 3 in the belt width direction is t = 0. 5 to 5 mm, the deviation amount t
Is obtained.

The cushion 5 of each of the transport belts 1 and 2 is made of foamed sponge.
And the belt body 3 are formed by integrally vulcanizing the sponge to the unvulcanized belt body 3, so that the sponge itself is slightly deteriorated by the heat at the time of vulcanization, but the surface of the sponge is slightly deteriorated by the vulcanization. Crushed and the surface rubber layer becomes thicker,
The abrasion resistance against surface scratches and the like of the cushion body 5 is improved, and the adhesiveness of the sponge is also stabilized, and the adhesive portion cannot be distinguished from the outside, so that the appearance of the belts 1 and 2 can be improved.

(Embodiment 2) FIGS. 6 and 7 show Embodiment 2 of the present invention (in the following embodiments, the same parts as those in FIGS. Detailed description is omitted). That is, in this embodiment, in the configuration of the first embodiment, the outer surface of the cushion body 5 of each of the transport belts 1 and 2 is formed in a step shape (the outer surface of the cushion body 5 of the mating belt 2 also has the same shape. ), The contact portions between the outer surfaces of the cushion bodies 5 and 5 of the belts 1 and 2 are formed in a stepped shape, so that the resistance of the plant P sandwiched between the cushion bodies 5 and 5 is increased and the plant P is easily pulled out. ing.

Further, on both side surfaces 5a and 5b in the width direction of the cushion body 5 of each of the conveying belts 1 and 2, the outer side in the width direction of the belt as the belt body 3 is approached. The arc surface 8 having an arc-shaped cross section is formed so as to be curved toward. The radius of curvature R of the arc surface 8 is preferably, for example, in the range of R = 1 to 8 mm.

According to this embodiment, the plant P is placed between the cushion bodies 5 and 5 in the parallel portions 1a and 2a of the belts 1 and 2.
When the cushion body 5 of each of the belts 1 and 2 is deformed downward in the belt width direction, stress concentration on the side of the side surfaces 5a and 5b in the belt width direction of the belt body 3 is prevented. Can be. Therefore, the cushion body 5 can be hardly peeled off from the belt main body 3, and the large deformation of the cushion body 5 due to the peeling can be suppressed, so that the ability of the belts 1 and 2 to hold the conveyed goods is large, and The breakage of the cushion body 5 can be prevented.

(Embodiment 3) FIG. 8 shows Embodiment 3.
In the configuration of the second embodiment (see FIGS. 6 and 7),
Each of the belts 1 and 2 is provided with a skin layer 9 on the outer surface of the cushion body 5. The skin layer 9 is, for example, a cushion body 5.
Is made of a soft rubber sheet such as neoprene integrally joined to the outer surface of the rubber sheet. The hardness of the rubber sheet is JIS-
A type hardness meter in the range of 20 to 90 ° is selected and used for each application. The thickness of the rubber sheet is 5m
m or less, and preferably 1 mm or less in order to transport a thick and irregularly shaped plant P. The skin layer 9 is integrated with the outer surface of the cushion body 5 by vulcanizing the outer surface of the cushion body 5 by covering the outer surface of the cushion body 5 with the rubber sheet or the like.
The skin layer 9 can be provided by coating the outer surface of the cushion body 5 with rubber paste and vulcanizing the same. According to this embodiment, there is an advantage that the wear resistance of the outer surface of the cushion body 5 can be improved.

(Embodiment 4) FIG. 9 shows Embodiment 4.
In the first embodiment, both side surfaces 5a and 5b of the cushion body 5 in the belts 1 and 2 in the belt width direction are shifted from the same side surfaces 3a and 3b of the belt main body 3. On the other hand, both side surfaces of the cushion body 5 in the belt width direction. 5a and 5b are inclined surfaces.

That is, in this embodiment, the outer surfaces of the cushion members 5 of the respective belts 1 and 2 are formed in a wave shape (the outer surfaces of the cushion members 5 of the mating belts 2 and 1 have the same shape). The removal resistance of the plant P held between the bodies 5 and 5 is increased.

Further, both side surfaces 3a, 3b of the belt body 3 in the belt width direction in each of the belts 1, 2 are the same as those in the first embodiment.
As in the case of the first embodiment, the cushion body 5 is formed of a plane substantially parallel to the belt thickness direction.
Is constituted by an inclined surface that is inclined toward the center of the belt width direction toward the outside of the belts 1 and 2 without holding the plant P. The inclination angle θ of the side surfaces 5a and 5b (inclined surfaces) in the belt width direction of the cushion body 5 with respect to the plane in the belt thickness direction is desirably θ = 10 to 30 °. That is, when the inclination angle θ is θ <10 °, the effect of suppressing the protrusion from the belt body 3 due to the deformation of the cushion body 5 is reduced, while when θ> 30 °, the cushion body 5
Since the effect of pulling out the plant P by the pinching is insufficient and the plant P cannot be pulled out satisfactorily, the inclination angle θ of the side surfaces 5a and 5b in the belt width direction of the cushion body 5 is θ = 1.
0 to 30 °.

Therefore, also in this embodiment, when the plant P is sandwiched between the parallel portions 1a and 2a of the two belts 1 and 2 and is pulled upward, the cushion body of each belt 1 and 2 is pulled by the force from the plant P. Even if 5 is deformed downward, the lower surface 5 a in the belt width direction formed of the inclined surface does not protrude downward from the belt main body 3. Therefore, as in the first embodiment, the belts 1 and 2 can be prevented from being damaged at an early stage, and the height of the flanges 14 of the transport pulleys 11 and 12 can be increased to obtain a belt separation preventing or meandering preventing effect. .

In the fourth embodiment, similarly to the first embodiment, the cushion members 5 on the belts 1 and 2 are used.
May be shifted toward the center in the belt width direction from the corresponding belt width direction side surfaces 3a, 3b of the belt body 3. In this way, even if the cushion body 5 is deformed, the side surfaces 5a and 5b in the belt width direction become more difficult to protrude from the belt main body 3, and the effect of preventing the belts 1 and 2 from being damaged early and the flanges 14 of the transport pulleys 11 and 12 are used. The belt separation preventing effect and the meandering preventing effect can be obtained even more effectively.

(Fifth Embodiment) FIG. 10 shows a fifth embodiment in which a skin layer 9 is provided on the outer surfaces of the cushion members 5 of the belts 1 and 2 in the structure of the fourth embodiment (see FIG. 9). Also in this embodiment, there is an advantage that the wear resistance of the outer surface of the cushion body 5 can be improved.

In the first to third embodiments, the belt 1,
2 both side surfaces 5 of the cushion body 5 in the belt width direction
Although a and 5b are shifted toward the center in the belt width direction with respect to the side surfaces 3a and 3b of the belt main body 3, only one of the side surfaces 5a (or 5b) may be shifted. That is, for example, as described above, when the stem P1 of the plant P is sandwiched between the belts 1 and 2 and pulled upward, the cushion body 5 is pulled downward by the reaction force from the plant P and deformed downward. Only the side 5a on the lower side in the belt width direction is the upper side,
In other words, it is only necessary to shift to the center side in the belt width direction, and there is no possibility that the opposite upper side surface 5b protrudes from the side surface 3b of the belt main body 3, so that it is not always necessary to shift.

In each of the above embodiments, the belts 1, 2
Although the cushion body 5 is made of foamed sponge, a material such as solid rubber can be used instead of sponge.

Further, in each of the embodiments described above, the transport device A provided in the plant harvester for extracting the plant P is described, but the present invention can be applied to a transport device for other uses. .

[0047]

As described above, according to the first aspect of the present invention, the pair of conveying belts wound around the conveying pulleys are partially parallel to the mating belt and contact the outer surface in the same direction. A parallel unit that travels at the same speed is provided, and in a transport device that transports a conveyed object such as a plant between the parallel portions, the transport belt, a belt body whose inner surface is wound around a transport pulley, A cushion body joined to the outer surface of the belt body, the outer surface of which comes into contact with the conveyed object, and at least one of the side surfaces in the belt width direction of the cushion body in a state where the conveyed object is not sandwiched, the belt width of the belt body. It was shifted to the center side in the belt width direction from the side surface in the direction. In the invention of claim 3, at least one of the side surfaces in the belt width direction of the cushion body in the conveyor belt is inclined toward the center of the belt in the belt width direction toward the outer side in a state where the conveyed object is not sandwiched. It consisted of. Further, in the invention of claim 4, at least one of the side faces in the belt width direction of the cushion body in the transport belt of the above-mentioned claim 3 is shifted toward the center side in the belt width direction from the side face in the belt width direction of the belt body. Therefore, according to these inventions, the cushion body deformed in the belt width direction by the force from the conveyed object is prevented from being damaged by the protrusion of the cushion body from the belt main body on the side in the belt width direction, thereby preventing early damage of the belt. In addition to this, the height of the flange of the transport pulley is set to be high, so that the effect of preventing the belt from coming off and meandering can be favorably maintained by the flange.

According to the second aspect of the present invention, the amount of deviation between the side surface of the cushion body in the belt width direction and the side surface of the belt body in the belt width direction is set to 0.5 to 5 mm. The amount of displacement between the side surfaces in the belt width direction can be optimized.

According to the fifth aspect of the present invention, in the conveying belt according to the third or fourth aspect, when the side surface in the belt width direction of the cushion body is inclined, the inclination angle of the side surface in the belt width direction of the cushion body is set to 10 to 10. By setting the angle to 30 °, a suitable range of the inclination angle of the side surface in the belt width direction of the cushion body can be obtained.

According to a sixth aspect of the present invention, at least one of the side surfaces in the belt width direction of the cushion body in the conveying belt according to the first aspect is provided at a joint side with the belt body.
By providing an arc-shaped surface with an arc-shaped cross section that curves outward toward the belt width direction as it approaches the belt body, it is difficult for the cushion body deformed in the belt width direction to peel off from the belt body at the time of transporting a conveyed object. In addition, it is possible to suppress the large deformation of the cushion body, maintain the increased capacity of the belt for holding the conveyed object, and prevent the belt from being damaged early due to the damage of the cushion body.

According to the seventh aspect of the present invention, since the cushion body of the belt is formed of foamed sponge, a desirable specific example of the cushion body can be obtained.

According to the invention of claim 8, the sponge and the belt body are joined together by integrally vulcanizing the sponge to the unvulcanized belt body, so that the surface of the sponge is vulcanized. By increasing the thickness of the rubber layer, the abrasion resistance against surface scratches and the like can be improved, and the sponge adhesion can be maintained stably and the appearance of the belt can be improved.

According to the ninth aspect of the present invention, by providing a skin layer on the outer surface of the cushion body, it is possible to improve the wear resistance of the outer surface of the cushion body.

[Brief description of the drawings]

FIG. 1 is a sectional view of a transport belt according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which vegetables are pulled out from the ground with a conveyor belt interposed therebetween.

FIG. 3 is a plan view showing a transport device in the plant harvester.

FIG. 4 is a cross-sectional view illustrating a state where the belt is wound around a transport pulley.

FIG. 5 is a cross-sectional view showing a state where the belt is wound around a guide pulley.

FIG. 6 is a diagram corresponding to FIG. 1, showing a second embodiment of the present invention.

FIG. 7 is an enlarged cross-sectional view illustrating a main part of a belt according to a second embodiment.

FIG. 8 is a view corresponding to FIG. 1 showing a third embodiment of the present invention.

FIG. 9 is a diagram corresponding to FIG. 1, showing a fourth embodiment of the present invention.

FIG. 10 is a view corresponding to FIG. 1, showing a fifth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS A Conveying device 1, 2 Conveying belt 1a, 2a Parallel part 3 Belt main body 3a, 3b Belt width direction side surface 5 Cushion body 5a, 5b Belt width direction side surface 8 Arc surface 9 Skin layer 11, 12 Transport pulley 14 Flange 16, 17 Guide pulley 18 Flange P Plant (conveyance)

Claims (9)

[Claims] 1. A pair of transport belts, each of which has an inner surface wound around a transport pulley, has a parallel portion which is partially parallel to a counterpart belt and travels in the same direction at the same speed while being in contact with the outer surface. The transport belt in a transport device provided for transporting a transported object such as a plant between the parallel portions, wherein the belt body has an inner surface wound around a transport pulley, and an outer surface of the belt body. And a cushion body whose outer surface is in contact with the conveyed object, and at least one of the side faces in the belt width direction of the cushion body is shifted to the center side in the belt width direction from the corresponding side face in the belt width direction of the belt body. A conveyor belt characterized by the following. 2. The conveying belt according to claim 1, wherein the amount of deviation between the side surface in the belt width direction of the cushion body and the side surface in the belt width direction of the belt body is 0.5 to 5 mm. 3. A pair of transport belts, each of which has an inner surface wound around a transport pulley, has a parallel portion which is partially parallel to a counterpart belt and travels in the same direction at the same speed in contact with the outer surface. A belt body provided in a transport device for transporting the article by pulling the article from the ground in a state where the article is sandwiched between the parallel portions, wherein a belt body having an inner surface wound around a transport pulley; A cushion body joined to the outer surface, the outer surface of the cushion body being in contact with the conveyed object, and at least one of the side surfaces in the belt width direction of the cushion body is an inclined surface inclined toward the belt outer side toward the center in the belt width direction. A transport belt, which is constituted. 4. The conveying belt according to claim 3, wherein at least one of the side surfaces in the belt width direction of the cushion body is shifted toward the center in the belt width direction from the corresponding side surface in the belt width direction of the belt body. Conveyor belt. 5. The conveying belt according to claim 3, wherein an inclination angle of a side surface of the cushion body in a belt width direction with respect to a belt thickness direction is 10 to 30 °. 6. The conveying belt according to claim 1, wherein the cushion body is curved on at least one of the side surfaces in the width direction of the cushion body and the joining side with the belt body so as to approach outwardly in the belt width direction as approaching the belt body. A transport belt, wherein an arc surface having an arc cross section is formed. 7. The conveyor belt according to claim 1, wherein the cushion body is made of foamed sponge. 8. The conveyor belt according to claim 7, wherein the cushion body and the belt main body are integrally vulcanized with the sponge and joined to the unvulcanized belt main body. 9. The conveyor belt according to claim 7, wherein a skin layer is provided on an outer surface of the cushion body.