JP2002114352A - Belt conveyor device and carrier belt replacing device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a belt conveyor device capable of reducing work labor when replacing a carrier belt and carrier belt replacing device and method. SOLUTION: One side plate 254 of the belt conveyor device 250 is formed into a size allowing attachment/detachment of the carrier belt 276. An outer end of each one of a pair of a driving side pulley shaft 264 and a driven side pulley shaft is extended to form a connecting part 294. The carrier belt replacing device 252 is provided with a shaft extension rod 282 and a support rod 284. Therefore, the side plate 254 is floated from the frame 258 when the shaft extension rod 282 is inserted into the connecting part 294 and the support rod 284 is raised and thereby the worn carrier belt 276 can be replaced with a new one.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor device, a transfer belt replacement device, and a transfer belt replacement method capable of reducing the labor required for replacing a transfer belt.

[0002]

2. Description of the Related Art In recent years,
2. Description of the Related Art Raising seedlings of crops such as paddy rice in a nursery is performed. There have been times when soil cultivation was used as the bed soil for such nurseries, but there were disadvantages such as good quality (homogeneous) soil cultivation being relatively expensive and difficult to obtain. As a prior art document in which this point is improved, there is a technique disclosed in Japanese Patent Publication No. 56-18165, in which a hydrophilic urethane prepolymer is used as a binder, and a plant soil material (such as bark, pulp chips, sawdust, etc.) is composted. Bark compost, etc.) is consolidated and then dried. Incidentally, polyvinyl alcohol or starch may be used as the binder in some cases. This kind of medium for raising seedlings has an advantage that so-called industrial waste such as bark and pulp chips can be effectively used as a cultivation material, and that a plant cultivation material is relatively inexpensive.

However, even with the medium for raising seedlings disclosed in the above-mentioned publication, it takes a long time (for example, about 1 to 3 hours) to bind the soil culture material (consolidation and drying using the bonding material), and mass production is not possible. Difficult and consequently high cost.Also, although the embankment material itself is relatively inexpensive, the binder material such as a hydrophilic urethane prepolymer is expensive, so that the overall result is expensive. And other issues remained.

Therefore, the applicant has agitated and mixed a group of crushed rice husks obtained by crushing rice hulls with a binder or the like to form a cultivation soil for raising seedlings, and then used a pair of upper and lower belt conveyors. Thus, a system for producing a seedling culture medium has been proposed in which a medium for seedling growth is formed by heating and cooling and compression molding from above and below, and then cut to a predetermined size and accumulated (see JP-A-2000-14242). ).

[0005] Fig. 8 is a perspective view showing the overall configuration of a belt conveyor device 300 used in the system for producing a seedling culture medium. As shown in this figure, the belt conveyor device 300 includes a pair of side plates 302 arranged in parallel with each other. Channel steel is used for the side plate 302, and is fixed to the upper surface of the gantry 304 with fixing bolts 306. A pair of driving pulley shafts 31 are provided between the pair of side plates 302 via bearings 308 and 310.
2. The driven pulley shaft 314 is supported. A driving pulley 316 is fixed to the driving pulley shaft 312,
A driven pulley 318 is fixed to the driven pulley shaft 314. These drive pulley 316 and driven pulley 31
A conveyor belt 320 is wound around the outer peripheral surface of the belt 8, and a predetermined tension is applied by a belt tension adjusting mechanism 322.

Here, the belt conveyor device 30 described above is used.
Since the 0 transport belt 320 is a member that is worn due to wear and the like, it is necessary to periodically check the presence / absence and degree of wear and the like, and replace it with a new transport belt as needed.

At this time, in the case of the structure of the conventional belt conveyor device 300 described above, the following work procedure is performed. That is, first, from the state shown in FIG. 9A, the fixing bolt 306 is removed from both side plates 302 as shown in FIG. 9B. Next, as shown in FIG. 9C, both side plates 302 are lowered from the gantry 304,
The entire belt conveyor device 300 is turned over (inverted). Then, as shown in FIG.
After removing the side plate 302 together with the bearings 308 and 310 from the driving side pulley shaft 312 and the driven side pulley shaft 314, the conveyor belt 320 is pulled out and replaced with a new conveyor belt. After the replacement, return to the original state by the reverse procedure.

[0008] Thus, the conventional belt conveyor device 30
In the case of the structure of No. 0, the work of turning over (inverting) the entire belt conveyor device 300 and the work of removing one of the side plates 302 are required.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a belt conveyor device and a conveyor belt exchange device and an exchange method which can reduce the labor required for exchanging the conveyor belt.

[0010]

According to a first aspect of the present invention, a belt conveyor device according to the present invention includes a pair of side plate portions which are disposed substantially parallel to each other and which is detachably fixed to a gantry, and is provided in a longitudinal direction of the side plate portions. Including a pair of pulley shafts that are arranged separately and supported by a pair of side plate portions, respectively, a pair of pulleys supported by each pulley shaft, and a transport belt wound around the pair of pulleys. In the belt conveyor device configured, at least one of the pair of side plate portions is formed in a size capable of extracting the transport belt, and the pulley shaft located on the side plate portion on the belt extracting side. Is provided with a connecting portion for connecting the pulley shaft extending member at an end of the pulley shaft.

According to a second aspect of the present invention, an apparatus for exchanging a conveyor belt according to the present invention is applied to the belt conveyor apparatus according to the first embodiment, is connectable to the connection portion, and has a width equal to or larger than the belt width of the conveyor belt. It is characterized by comprising a pulley shaft extension member having a shaft length.

According to a third aspect of the present invention, there is provided the transfer belt exchanging device according to the second aspect, wherein the pulley shaft extending member is supported near the end on the side opposite to the connecting portion so that the height can be adjusted. And a member.

According to a fourth aspect of the present invention, there is provided a method for exchanging a conveyor belt according to the present invention, comprising: a first step of releasing the side plate portion on the belt extracting side from being fixed to a gantry; A second step of connecting the pulley shaft extension member, a third step of displacing the vicinity of the end of the pulley shaft extension member on the side opposite to the connection portion upward, and then removing the transport belt from the pair of pulleys; A fourth step of mounting the conveyor belt for use on a pair of pulleys, displacing the vicinity of the end of the pulley shaft extension member on the side opposite to the connection portion downward, and placing the side plate portion on the belt removal side on a gantry. And a fifth step of fixing the side plate portion to the gantry again.

According to a fifth aspect of the present invention, there is provided a method for exchanging a conveyor belt according to the present invention, wherein a first step of releasing a fixing state of the side plate portion on the belt extracting side to a gantry, and applying a predetermined tension to the conveyor belt. A second step of loosening the tension by operating the tension applying means, a third step of connecting the pulley shaft extension member to the connection portion of the pair of pulley shafts, and a non-connection portion of the pulley shaft extension member. Using a bearing member mounted near the end on the side of the pulley, displacing the vicinity of the end on the side opposite to the connection portion of the pulley shaft extension member upward, and then moving the transport belt to the pulley shaft extension member side. After displacing the vicinity of the end of the pulley shaft extending member on the side opposite to the connecting portion using the bearing member and placing the side plate portion on the gantry, the bearing member is detached from the pulley shaft extending member. Transfer belt from pulley shaft extension A fifth step of detaching and, after wrapping the transfer belt for replacement around the pair of pulley shaft extension members, reattaching the support member to the pulley shaft extension member and using the support member to reverse the pulley shaft extension member; After displacing the vicinity of the end on the connecting portion side upward, a sixth step of mounting a replacement conveyor belt on the pair of pulleys, and using the bearing member to be near the end of the pulley shaft extension member on the side opposite to the connecting portion. And displacing the side plate portion on the gantry, disengaging the pulley shaft extension member from the connection portion of the pulley shaft, and applying a predetermined tension to the exchanged conveyor belt using the tension applying means. An eighth step is provided, and a ninth step of fixing the side plate portion to the gantry again is provided.

According to the first aspect of the present invention, since the connecting portion is provided at the end of the pulley shaft located on the side plate portion on the belt extracting side, the pulley shaft extending member is connected to the connecting portion. Can be. As a result, the substantial shaft length of the pulley shaft is increased, and the vicinity of the end of the pulley shaft extension member can be lifted, so that the entire belt conveyor device can be inclined. Further, in the present invention, since at least one of the pair of side plate portions is formed in a size capable of extracting the conveyor belt, if the belt conveyor device is inclined, the conveyor belt is extracted to the pulley shaft extension member side. be able to.

When the transport belt is removed, a new transport belt for replacement is wound around the pulley shaft extension member, and the vicinity of the end of the pulley shaft extension member is lifted again. In this state, after the replacement conveyance belt is wound around the pair of pulleys, the pulley shaft extension member is displaced downward, and the side plate portion is placed on the gantry. Thereafter, the pulley shaft extension member is detached from the connection portion, and the side plate portion may be fixed again on the gantry.

In this way, the transport belt of the belt conveyor device can be easily replaced. Therefore, as in the conventional case, the entire belt conveyor device is turned over (inverted).
It is not necessary to perform the operation of removing the one side plate portion and the operation of removing the side plate portion.

According to the second aspect of the present invention, the transfer belt of the belt conveyor device is replaced using the transfer belt replacement device. Specifically, since the transfer belt exchanging device is configured to include a pulley shaft extending member having an axis length equal to or greater than the belt width of the conveying belt, the pulley shaft extending member is connected to a pair of pulley shafts of the belt conveyor device. The transfer belt can be replaced in the same procedure as in the first aspect of the present invention.

According to the third aspect of the present invention, since the support member is provided near the end on the side opposite to the connection portion of the pulley shaft extending member, the height adjustment near the end is performed using the support member. Can be. For example, when the side plate portion is lifted from the gantry, the support member may be extended, and when the side plate portion is mounted on the gantry, the support member may be contracted. This eliminates the need to manually lift and lower the vicinity of the end of the pulley shaft extension on the side opposite to the connection portion.

According to the present invention, in the first step, the fixing state of the side plate portion on the belt extracting side to the gantry is released. Next, in a second step, a pulley shaft extending member is connected to a connection portion between the pair of pulley shafts, and the substantial shaft length of the pulley shaft is extended. Next, in the third step, the vicinity of the end of the pulley shaft extension member on the side opposite to the connection portion is displaced upward, and the side plate portion from which the fixed state has been released is floated from the mount. In this state, the transport belt is pulled out from the pair of pulleys. Next, in the fourth step, the replacement conveyor belt is mounted on the pair of pulleys, and then the vicinity of the end of the pulley shaft extending member on the side opposite to the connection portion is displaced downward to float the side plate portion that has been floated. Is placed on the gantry. Thereafter, in a fifth step, the side plate portion is fixed to the gantry again.

In this manner, the transport belt of the belt conveyor device can be easily replaced. Therefore, as in the conventional case, the entire belt conveyor device is turned over (inverted).
It is not necessary to perform the operation of removing the one side plate portion and the operation of removing the side plate portion.

According to the fifth aspect of the present invention, in the first step, the fixing state of the side plate portion on the belt extracting side to the gantry is released. Next, in the second step, the tension applied to the conveyor belt is reduced by operating the tension applying means. Next, in a third step, a pulley shaft extending member is connected to the connection portion of the pair of pulley shafts, and the substantial shaft length of the pulley shaft is extended. Next, in the fourth step, the vicinity of the end of the pulley shaft extension member on the side opposite to the connection portion is displaced upward using the support member, and the side plate portion from which the fixed state has been released is floated from the gantry. In this state, the transport belt is detached from the pair of pulleys and is moved toward the pulley shaft extending member. Next, in a fifth step, the vicinity of the end of the pulley shaft extension member on the side opposite to the connection portion is displaced downward using the support member, and the side plate portion from which the fixed state has been released is placed on the gantry. . Thereafter, the support member is detached from the pulley shaft extension member, and the transport belt is removed from the pulley shaft extension member. Next, in a sixth step, a transfer belt for replacement is wound around a pair of pulley shaft extension members. Thereafter, the support member is attached to the pulley shaft extension member again, and the vicinity of the end of the pulley shaft extension member on the side opposite to the connection portion is displaced upward using the support member. Then, in this state, the transfer belt for replacement is mounted on the pair of pulleys. Next, in a seventh step, the vicinity of the end of the pulley shaft extension member on the side opposite to the connection portion is displaced downward using the support member, and the floating side plate portion is placed on the gantry. Next, in an eighth step, the pulley shaft extending member is detached from the connection portion of the pulley shaft, and a predetermined tension is applied to the transport belt after the replacement using the tension applying means. Thereafter, in a ninth step, the side plate portion is fixed to the gantry again.

In this way, the conveyor belt of the belt conveyor device can be easily replaced. Therefore, as in the conventional case, the entire belt conveyor device is turned over (inverted).
It is not necessary to perform the operation of removing the one side plate portion and the operation of removing the side plate portion.

Further, in the present invention, since the conveying belt is exchanged using the support member, the vicinity of the end of the pulley shaft extending member on the side opposite to the connecting portion is manually lifted,
There is no need to carry it down.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a belt conveyor device, a transfer belt replacement device and a replacement method according to the present invention will be described below with reference to FIGS.

First, a seedling culture medium (formed mat) 10 manufactured by a seedling culture medium manufacturing system using the belt conveyor device according to the present embodiment will be described.

[0027] As shown in FIG.
Is mainly composed of a crushed rice hull group 12 serving as a medium base material, a binder 14 composed of a core-sheath type fiber, and an element group 16 composed of various elements such as fertilizer for raising seedlings necessary for producing the medium. It is configured. As shown in FIG. 3, the core-sheath fiber used as the binder 14 is
A and a sheath portion 14B, which are complex and fine net-like. The sheath 14B softens at a predetermined temperature (eg, 110 ° C.), while the core 14A softens at a higher temperature (eg, 250 ° C.). As shown in FIG. 1, the element group 16 includes a mixed solution 1 of a fertilizer for raising seedlings (a fertilizer for medium-term growing, a fertilizer for initial growing, etc.), a pH adjuster, and a germination inhibitor remover.
In addition to 34 and the surfactant 108, other elements 116 such as an agent for propagation of high-quality soil bacteria are included.

To further supplement, in this embodiment, FIG.
As shown in FIG. 4 and FIG.
In order to insert 0, the seedling culture medium 10 is formed in a mat shape having a vertical dimension of 28 cm, a horizontal dimension of 58 cm, and a thickness dimension of 2 cm, but the dimensions are appropriately changed as necessary.

Next, a system for producing a seedling culture medium using the belt conveyor device according to the present embodiment will be described.

FIG. 1 is a flow chart showing all the steps of the system for producing a seedling culture medium according to the present embodiment. FIG.
In the rice husk supply step shown in FIG.
Is used. The rice husk supply device 20 includes a device main body 22 provided with wheels 22A, and a rice husk group 26 mixed with waste rice is supplied from a rice hull group supply port 24 in the device main body 22. A screw conveyor 28 is provided in the apparatus main body 22, and the crushed rice-mixed rice hulls 26 supplied into the apparatus main body 22 are conveyed by the screw conveyor 28 in the arrow direction. On the downstream side of the apparatus main body 22 in the conveying direction, a fryer cylinder 30 extending in the apparatus height direction is provided upright, and the waste rice hulls group 26 conveyed by the screw conveyor 28 is used for frying such as a slotter (not shown). After the inside of the fryer cylinder 30 is fried by the above, it is discharged from the chaff group discharge port 32 formed at the upper end of the fryer cylinder 30.

In the waste rice separation step shown in FIG.
A waste rice separation device 40 is used. The waste rice separation device 40 includes a funnel-shaped supply hopper 42 in the upper stage,
Rice husk group 2 mixed with waste rice discharged from rice hull group outlet 32
6 is supplied into the supply hopper 42. Supply hopper 4
A feed valve 44 is provided at the lower end of the second unit 2, and a tank-like sorting unit 46 is further provided below the feed valve 44. A flat upper inclined plate 48 is disposed below the delivery valve 44 in the sorting unit 46 at a predetermined inclination angle, and a flat lower inclined plate 50 is provided near the lower end of the upper inclined plate 48. Are arranged at a predetermined inclination angle. The lower part of the sorting unit 46 has a funnel shape, and the lower end thereof is opened to serve as a waste rice discharge port 52. Below the waste rice discharge port 52, a waste rice storage box 56 for storing the waste rice 54 is provided. Further, the above-described sorting unit 4
6 is connected to one end of a wind selection duct 58. A suction fan 60 is connected to the other end of the wind selection duct 58, and the sorted rice hulls 62 are discharged from a discharge port 60 </ b> A of the suction fan 60.

In the rice husk crushing step shown in FIG.
A rice husk crusher 70 is used. A funnel-shaped supply hopper 72 is provided in the upper stage of the rice husk crushing device 70, and the rice hull group 62 discharged from the discharge port 60 </ b> A of the suction fan 60.
Is supplied into the supply hopper 72. A feed valve 74 is provided at the lower end of the supply hopper 72, and a pulverization processing unit 76 having a horizontal spire shape is provided below the supply hopper 72, that is, in the middle of the rice husk crusher 70. A pulverizing drum 78 is provided in the pulverizing section 76. The crushing drum 78 rotates around an axis by receiving a driving force from a driving unit 80 provided at a lower stage of the rice hull crushing device 70, thereby performing a crushing process so as to grind the rice husk group 62. The crushed rice hull group 12 that has been subjected to the crushing process is configured to be discharged from the crushed rice hull group discharge port 82 at the tip end of the crushing processing unit 76.

The element group quantitative supply step shown in FIGS. 1 (D-1) to 1 (D-3) includes the element supply step shown in FIG. 1 (D-1) and the element supply step shown in FIG. 1 (D-2). And a step of supplying a liquid fertilizer etc. shown in FIG. 1 (D-3).

In the element supply step shown in FIG. 1 (D-1), an element supply device 90 is used. Element supply device 90
Is provided with a belt conveyor device 94 that moves the transport belt 92 in the direction of the arrow when driven. Above the belt conveyor 94, a first supply unit 96, a second supply unit 98, and a third supply unit 100 are arranged in this order along the transport direction. The binder 14 is accommodated in the first hopper 102 provided in the first supply unit 96, and a predetermined amount of binder 1 is supplied by operating the first feed valve 104.
4 is dropped on the transport belt 92.
Further, a surfactant 108 is contained in a second hopper 106 provided in the second supply unit 98, and the second delivery valve 1
A predetermined amount of the surfactant 108 is dropped onto the transport belt 92 by the operation of the operation of the ten. Further, other elements 116 are accommodated in a third hopper 112 provided in the third supply unit 100, and a predetermined amount of the other elements 116 falls on the transport belt 92 by operating the third feeding valve 114. It is supposed to be. Note that the above-described first supply unit 96 to third supply unit 10
0 is operated by a timer (not shown) so as to supply a predetermined amount of each element to an element supply port 144 of a stirring and mixing tank 142 described later (that is, to supply a fixed amount). Has become.

In the crushed rice husk group supply step shown in FIG. 1D-2, a crushed rice husk group supply device 120 is used. The crushed rice husk group supply device 120 includes
And a funnel-shaped supply hopper 122 to which the crushed chaff group 12 discharged from the crushed chaff group discharge port 82 of the crushing processing unit 76 is supplied. A base end of a horizontally elongated casing 124 is connected to a lower end of the supply hopper 122. A screw conveyor 126 is accommodated in the casing 124, and is rotated around its axis by receiving a driving force, so that the crushed rice hulls 12
Is transported. Also, the casing 124
A ground chaff group discharge port 128 is formed at the bottom portion on the tip side of the pulverized chaff group, and the ground chaff group 12 conveyed by the screw conveyor 126 is discharged from the ground chaff group discharge port 128. The above-described crushed rice hull group supply device 120 is operated by a timer (not shown), and a predetermined amount of the crushed rice hull group 1 is set in advance.
2 is an element supply port 144 of a stirring and mixing tank 142 described later.
(That is, constant-rate supply).

In the liquid fertilizer supply step shown in FIG. 1D-3, a liquid fertilizer spray supply device 130 is used. The liquid fertilizer spray supply device 130 includes a storage tank 132. Liquid fertilizer and PH adjuster
A mixed solution 134 of a germination inhibitor remover is stored, and a predetermined amount of the mixed solution 13 is set by driving a pump 136 by a timer (not shown).
4 is an element supply port 144 of a stirring and mixing tank 142 described later.
It is designed to be sprayed (that is, metered supply).

In the stirring and mixing step shown in FIG.
A stirring and mixing device 140 is used. Stirrer / mixer 140
Has a stirring and mixing tank 142. An element supply port 144 is formed at the upper end of the stirring and mixing tank 142, and the above-described crushed rice hulls 1
2 and the binder 14 are supplied, and the mixed solution 13
4 is sprayed. Further, in the stirring and mixing tank 142, a stirring blade 146 that rotates in the direction of the arrow around the axis when receiving a driving force is disposed. Further, at the lower end of the stirring and mixing tank 142, a cultivation soil discharge port 150 for discharging the cultivation soil for seedling 148 generated by the stirring and mixing is formed. The soil release port 150 can be opened and closed by a lid 152. In addition, a belt conveyor device 156 that moves the transport belt 154 in the direction of the arrow by driving is disposed immediately below the lid 152 in the stirring and mixing tank 142.

In the compression molding step shown in FIG.
A compression molding device 160 is used. Compression molding device 160
Is provided with a pair of upper and lower lower belt conveyor devices 162 and an upper belt conveyor device 164. The conveyor belt 166 of the lower belt conveyor device 162 and the conveyor belt 168 of the upper belt conveyor device 164 are vertically separated (opposed) by a predetermined distance, and the distance is the thickness of the forming medium 185 described later. I have decided. Also,
Although the upper belt conveyor device 164 and the lower belt conveyor device 162 have the same end positions on the downstream side in the transport direction, the transport length of the upper belt conveyor device 164 is longer than the transport length of the lower belt conveyor device 162. It is set short. That is, the upper belt conveyor device 164
Are arranged in a state of being shifted to the downstream side in the transport direction of the lower belt conveyor device 162.

By adopting the above layout, a predetermined upper space is secured upstream of the lower belt conveyor device 162 in the transport direction, and a funnel-shaped cultivation supply hopper 170 is disposed in the upper space. Have been. A feeding valve 1 is provided at the lower end of the cultivation soil supply hopper 170.
A predetermined amount of seedling cultivation soil 148 is discharged onto the transport belt 166 of the lower belt conveyor device 162 by operating the feeding valve 172. Further, a pair of equalizing screws 174 and 176 are arranged between the cultivation soil supply hopper 170 and the upper belt conveyor device 164. These equalizing screws 174 and 176 play a role in rotating the seedling cultivation soil 148 supplied from the soil cultivation supply hopper 170 in the axial direction (the width direction of the transport belt 166) by rotating around the axis thereof.

In the above-mentioned opposed portions of the conveyor belt 166 of the lower belt conveyor device 162 and the conveyor belt 168 of the upper belt conveyor device 164, a pair of upper and lower heating and compression plates 178 and 180 and a cooling and compression plate 182 are formed. 1
84 are provided. The heating compression plates 178 and 180 are arranged on the upstream side in the transport direction, and the cooling compression plates 182 and
Reference numeral 84 is arranged on the downstream side in the transport direction. Heating compression board 1
Since the detailed structures of the cooling plates 78 and 180 will be described later, only the configuration of the cooling compression plates 182 and 184 will be briefly described here. The cooling compression plates 182 and 184 are configured with a water pipe (not shown) as a main part. A circulating pump and a cooling water tank are connected to the water pipe, and when the circulating pump is operated, cooling water circulates in the water pipe to cool the cooling compressors 182 and 184 at a predetermined temperature (for example, 20 ° C. to 30 ° C.).
° C).

The continuous long mat-shaped forming medium 185 formed by heating compression and cooling compression sequentially by the above-described compression molding apparatus 160 is provided downstream of the lower belt conveyor 162 and the upper belt conveyor 164 in the transport direction. It is configured to be discharged from a molding medium discharge port 186 formed between the ends on the side.

In the molding medium cutting step shown in FIG. 1 (G), a mat cutting device 190 is used. The mat cutting device 190 includes a casing 192. On one side of the casing 192, a mat insertion port 194 into which a continuous long mat-shaped forming medium 185 formed in the compression molding step is inserted is formed, and on the other side of the casing 192, A mat outlet 196 for discharging the seedling culture medium (formed mat) 10 after cutting is formed. Further, inside the casing 192, a pair of fixed blades 198 and a movable blade 200 are arranged above and below the transport path of the long mat-shaped molding medium 185. In addition,
The fixed blade 198 is disposed below the transport path,
The movable blade 200 is disposed above the transport path.
In addition, the movable blade 200 is lowered by receiving a driving force of a driving unit (not shown) at a predetermined timing, and cuts down (fixed size cutting) the forming medium 185. Thereby, the seedling raising medium (formed mat) 10 is formed.

In the step of accumulating the seedling culture medium (formed mat) shown in FIG. 1H, a mat accumulating device 210 is used. The mat accumulating device 210 includes a first belt conveyor device 212 and a second belt conveyor device 214. The first belt conveyor device 212 is a mat cutting device 1
It is arranged below the mat discharge port 196 at 90, and receives the seedling culture medium 10 cut to a predetermined size on the transport belt 216 and transports it in the direction of the arrow. On the other hand, the second belt conveyor device 214 is disposed immediately below the first belt conveyor device 212 on the downstream side in the transport direction, and when a predetermined number of seedling culture media 10 are accumulated on the transport belt 218, the seedling The medium for use 10 is transported in the direction of the arrow.

Next, with reference to FIGS. 5 and 6, the configurations of the belt conveyor device 250 and the conveyor belt exchanging device 252, which are main parts of the present embodiment, will be described in detail. In addition, the belt conveyor device 250 performs the element supply step (FIG. 1 (D-1)) in the system for producing a seedling culture medium described above.
The belt conveyor device 94 of FIG.
(E)), the lower belt conveyor 162 of the compression molding process (see FIG. 1 (F)).
And the upper belt conveyor device 164, the first belt conveyor device 212 in the seedling culture medium accumulation step (see FIG. 1 (H)).
And the second belt conveyor device 214.

As shown in FIGS. 5 and 6, the belt conveyor device 250 includes a pair of side plates 254 and 256 each made of lightweight channel steel. Each side plate 25
4 and 256 are a pair of mounts 25 arranged in parallel with each other.
8, 260 are fixed to the upper end portions by fixing bolts 262. A drive-side pulley shaft 264 and a driven-side pulley shaft 266 are rotatably supported by bearings 268 and 270 at both ends in the longitudinal direction of the pair of side plates 254 and 256.
The driving pulley shaft 264 is connected to driving means (not shown) including a motor, a gear box, and the like.

The driving pulley 2 is mounted on the driving pulley shaft 264.
The driven pulley 274 is fixed to the driven pulley shaft 266. A transport belt 276, which is an endless belt, is wound around the outer peripheral surfaces of the driving pulley 272 and the driven pulley 274.
Further, a belt tension screw 27 is attached to the driven pulley shaft 266.
8, the driven pulley shaft 266 is slid in the longitudinal direction of the side plates 254 and 256 according to the screwing stroke of No. 8, and a tension applying mechanism 280 is provided as “tension applying means” for applying a predetermined tension to the transport belt 276. Have been. Therefore, the driven side pulley shaft insertion holes (not shown) formed in the side plates 254 and 256 are elongated holes along the longitudinal direction of the side plates 254 and 256.

Here, in the present embodiment, of the pair of side plates 254 and 256, the peripheral length of one side plate 254 is formed smaller than the peripheral length of the transport belt 276.
Therefore, the side plate 254 can pass through the inside of the transport belt 276.

The ends of the drive pulley shaft 264 and the driven pulley shaft 266 on the side plate 254 side are formed (extended) longer than usual (ie, compared with the end portions on the side plate 256 side). Portions are connection portions 294, 296.

On the other hand, as shown in FIG. 6, the conveyor belt exchange device 252 used when exchanging the conveyor belt 276 of the belt conveyor device 250 having the above-mentioned structure is constituted by a shaft extension rod 282 and a support rod 284. ing. The shaft extension rod 282 is formed in a tubular shape, and the inner diameter thereof is set substantially equal to the outer diameter of the connection portions 294, 296. Therefore, the shaft extension rod 282 can be inserted into the connection portions 294, 296.

The support rod 284 is formed in a tubular shape, and has a support part 284A having a semicircular cross section at its upper end.
Is formed, and an adjust bolt 288 with a base is fitted to the lower end from below. Further, the male screw portion of the adjusting bolt 288 has an annular support portion 2.
A handle 290 composed of 90A and a grip 290B protruding in the radial direction is screwed. Annular support 29
The lower end of the support rod 284 is in contact with the upper surface of 0A. Therefore, when the handle 290 is rotated around its axis, the support bar 284 is configured to move vertically in the axial direction.

Note that the shaft extension rod 282 in the above configuration corresponds to the “pulley shaft extension member” in the present invention, and the support rod 284, the adjustment bolt 288, and the handle 290.
Corresponds to the “support member” in the present invention.

Next, the operation and effect of this embodiment will be described.

First, the overall flow of the system for producing a seedling culture medium according to the present embodiment will be outlined. FIG. 1 (A)
In the rice husk supply step shown in FIG. 2, the rice husk group 26 mixed with waste rice after the hulling process is carried by a belt conveyor device or a forklift and the rice hull group supply port 2 of the rice husk supply device 20.
4. Then, when the screw conveyor 28 of the rice hull supply device 20 is driven, the waste rice husk group 26 accommodated in the device main body 22 is removed by the screw conveyor 2.
After being conveyed in the direction of the arrow by 8, it is discharged from the rice husk group discharge port 32 of the fryer cylinder 30 by a fryer such as a slower (not shown). In the present process, what is referred to as "rice-mixed rice hulls" is that a group of rice husks is generated at the stage of the rice-hulling processing by the rice hulling machine, and a small amount of rice husk 5
4 (described below) is included, so as to be distinguished from the rice hulls group 62 from which waste rice has been removed as described below.

Next, in the waste rice separation step shown in FIG. 1B, the waste rice mixed rice hulls 26 are supplied into the supply hopper 42 of the waste rice separation device 40. The supplied rice husk-mixed rice hulls group 26 is fed out by a predetermined amount by a feed-out valve 44, and then is sorted by a sorting unit 46 (wind sorting process).
Is done. Specifically, the waste rice husks group 26 fed from the feed valve 44 first falls on the upper inclined plate 48, flows down as it is, and then falls on the lower inclined plate 50 disposed therebelow. You. At this time, the rice husks having a lower specific gravity are sucked into the wind selection duct 58 by the suction force of the suction fan 60 (the flow is indicated by solid arrows in the drawing), and the scrap rice 54 having a higher specific gravity than the rice hulls is not sucked. It falls on the lower inclined plate 50 and flows down as it is (indicated by a broken line arrow in the figure), and is discharged from the waste rice discharge port 52 and the waste rice storage box 5
6. Thereby, the waste rice 54 is separated from the waste rice-mixed rice hull group 26, and only the rice hull group 62 is sorted and discharged from the discharge port 60A of the suction fan 60.

Next, the rice hull group 62 is supplied into the supply hopper 72 of the rice husk crusher 70 in the rice husk crushing step shown in FIG. The supplied chaff hulls 62 are fed out by a predetermined amount by a feeding valve 74 and then pulverized in a pulverization processing unit 76. Specifically, the crushing drum 78 arranged in the crushing processing unit 76 is
The rotation of the rice hulls 62 is caused to rotate around the axis by receiving the driving force from the crushing drum 78, whereby the rice hulls 62 are ground and crushed into small pieces. The crushed rice hulls group 12 that has been crushed,
The crushed rice husks are discharged from the crushed rice husk group outlet 82 of the crushing processing unit 76.

Next, FIG. 1 (D-1) to FIG. 1 (D-3)
In the element group quantitative supply step shown in (2), each element is supplied at a predetermined timing into the element supply port 144 of the stirring and mixing device 140 used in the next step.

Specifically, in the element supply step shown in FIG. 1D-1, the first supply valve 104 of the first supply section 96 of the element supply device 90 and the second supply valve of the second supply section 98 are provided. 110, third delivery valve 1 of third supply unit 100
14 are operated at a predetermined timing and at a predetermined feeding speed. As a result, a predetermined amount of the binder 14 is dropped from the first supply unit 96 onto the transport belt 92, and
From the supply unit 98, a predetermined amount of the surfactant 108 is dropped onto the conveyor belt 92, and from the third supply unit 100, a predetermined amount of other elements 116 is dropped onto the conveyor belt 92.
The binder 14, surfactant 108, and other components 116 dropped on the conveyor belt 92 are transferred to a belt conveyor device 94.
And supplied into the element supply port 144 of the stirring and mixing device 140 used in the next step (that is, constant-rate supply).
Is done.

In the step of supplying the crushed chaff group shown in FIG. 1 (D-2), the crushed chaff group 12 formed in the previous step is provided.
Is supplied into the supply hopper 122 of the crushed rice husk group supply device 120. The supplied crushed rice hulls group 12 is conveyed in the direction of the arrow by a screw conveyor 126 driven at a predetermined timing, and is discharged from the crushed rice hulls group outlet 128. The discharged crushed rice hulls group 12 is supplied into the element supply port 144 of the stirring / mixing device 140 used in the next step (that is, constant supply).

Further, in the liquid fertilizer etc. supplying step shown in FIG. 1 (D-3), the pump 136 of the liquid fertilizer etc. spray supplying device 130 is driven at a predetermined timing, so that the liquid fertilizer stored in the storage tank 132 is removed. A mixed solution 134 of the PH adjuster / germination inhibitor remover is pumped by a predetermined amount. The pumped mixed solution 134 is sprayed (ie, metered supply) into the element supply port 144 of the stirring and mixing device 140 used in the next step.

Next, each element is supplied into the element supply port 144 of the stirring and mixing device 140 by the stirring and mixing step shown in FIG. The supplied elements are stirred and mixed by rotating the stirring blades 146 at a predetermined rotation speed for a predetermined time in the stirring and mixing tank 142. As a result, a seedling culture soil 148 including the crushed rice hull group 12, the binder 14, and the element group 16 is formed. The seedling cultivation soil 148 formed as described above is discharged from the soil cultivation discharge port 150 by opening the lid 152 provided at the lower end of the stirring and mixing tank 142. The discharged seedling cultivation soil 148 falls on the conveyor belt 154 of the belt conveyor device 156, and the belt conveyor device 15
6 is driven to be conveyed in the direction of the arrow.

Then, in the compression molding step shown in FIG. 1 (F), the seedling raising soil 148 conveyed by the belt conveyor device 156 is leveled and compression molded. More specifically, the seedling raising soil 148 is supplied into the soil feeding hopper 170 provided in the compression molding device 160. The supplied seedling culture medium 148 is supplied to the feeding valve 17.
After being fed out by a predetermined amount by 2, it is dropped on the transport belt 166 of the lower belt conveyor device 162. The seedling cultivation soil 148 dropped on the conveyor belt 166 is conveyed at a predetermined speed in the direction of the arrow by driving the lower belt conveyor device 162, and a pair of the cultivation soil 148 disposed adjacent to the cultivation supply hopper 170 during that time Equalizing screw 1
It is leveled in the axial direction (the width direction of the transport belt 166) by 74 and 176.

The seedling cultivation soil 148 equalized by the equalizing screws 174 and 176 is placed between the upper belt of the conveyor belt 166 of the lower belt conveyor device 162 and the lower belt of the conveyor belt 168 of the upper belt conveyor device 164. It is fed in and is conveyed in the direction of the arrow while being sandwiched between the two conveyor belts 166 and 168. At this time,
Seedling cultivation 1 by a pair of heat compression plates 178 and 180
48 is heat compression molded. The heating temperature at this time is such that the sheath 14B of the binder 14 is softened, but the core 1
4A is a predetermined temperature that does not soften. The degree of pressurization is set so that the thickness of the seedling raising soil 148 that has been equalized by the equalizing screws 174 and 176 is about half. As described above, the heating and compression plates 178, 1
When the seedling cultivation soil 148 is heated and compressed by 80, the sheath 14B of the binder 14 is softened and partially welded to each other to form a fine mesh and become entangled with the crushed rice hull group 12 and the like.

The heat-compressed seedling cultivation soil 148 is subsequently subjected to cooling compression molding by a pair of cooling compression plates 182 and 184. As a result, the sheath 14B of the binder 14 which has been softened and welded is immediately cooled, and the crushed rice hulls 12
It is cured while being entangled with the like. As a result, it is possible to obtain a continuous long mat-shaped molding medium 10 having the characteristics of not being easily broken or broken, being inexpensive and being easy to handle.
It is discharged from a molding medium discharge port 186 provided on the downstream side in the transport direction between the belt 4 and the lower belt conveyor device 162.

Next, in the forming medium cutting step shown in FIG. 1 (G), the forming medium 185 is inserted from the mat insertion port 194 of the mat cutting device 190. The inserted continuous mat medium 185 is cut (fixed cut) at a predetermined size by moving the movable blade 200 toward the fixed blade 198 at a predetermined timing. As a result, the medium 10 for raising seedlings, which is a product, is formed and discharged from the mat discharge port 196 of the mat cutting device 190.

Next, a predetermined number of seedling culture mediums 10 are accumulated in the seedling culture medium (molded mat) accumulation step shown in FIG. 1 (H). Specifically, when the seedling culture medium 10 is discharged from the mat discharge port 196 of the mat cutting device 190, first, the mat accumulating device 21 disposed immediately below the mat collecting device 21 is disposed.
0 conveyor belt 216 of the first belt conveyor device 212
The seedling culture medium 10 is dropped thereon. Nursery medium 10
Are transported in the direction of the arrow by the first belt conveyor device 212 and are stacked on the transport belt 218 of the second belt conveyor device 214. When ten sheets of the seedling culture medium 10 are accumulated, the second belt conveyor device 214 is driven and transported in the direction of the arrow. In addition, the seedling-growing medium 1 in an accumulated state transported by the second belt conveyor device 214.
Nos. 0 are sequentially packed in a packing cardboard box or the like prepared in advance and shipped.

When using the seedling culture medium 10 produced as described above, as shown in FIG. 4, the seedling culture medium 10 is laid in a seedling raising box 18, irrigated, and cultivated such as paddy rice. Seedlings 230 are sown, covered with soil 232, and irrigated and temperature-controlled daily to grow the seedlings.

Here, the belt conveyor device 94 in the above-described element supply process and the belt conveyor device 1 in the stirring and mixing process are used.
56, the lower belt conveyor device 162 and the upper belt conveyor device 164 of the compression molding process, and the first belt conveyor device 212 and the second belt conveyor device 214 of the seedling culture medium accumulating process, the belt conveyor device 250 according to the present embodiment. However, when used for a long period of time, the transport belt 276 of the belt conveyor device 250 may be worn due to abrasion or the like. In this case, the transport belt 276 is replaced using the transport belt replacement device 252 in the following manner.

First, as shown in FIG. 7A, the fixing bolt 262 of one side plate 254 is removed (this step corresponds to the first step of the fourth aspect and the first step of the fifth aspect). . Next, the belt tension screw 278 is loosened,
The tension applied to the conveyor belt 276 is removed (this step corresponds to the second step in claim 5).

Next, the conveyor belt exchange device 252 is mounted on the belt conveyor device 250. That is, FIG.
As shown in (B), a shaft extension rod 282 is connected to a connecting portion 294 of the driving pulley shaft 264 and a connecting portion 296 of the driven pulley shaft 266, respectively.
In addition, the substantial axial length of the driven pulley shaft 266 is extended (this step corresponds to the second step according to claim 4 and the third step according to claim 5).

Next, the support 28 at the upper end of the support rod 284
4A is applied to the outer end of the driving pulley shaft 264 and the outer end of the driven pulley shaft 266 from below. Next, by rotating the handle 290, the outer end of the support rod 284 is displaced upward as shown in FIG. When the outer end of the support rod 284 is displaced upward, the side plate 254 that has been released from the fixed state is lifted off the gantry 258. In this state, as shown in FIG.
Is removed from the pair of the driving pulley 272 and the driven pulley 274 and is moved to the shaft extension rod 282 side (this step corresponds to a fourth step of the fifth aspect). In the present embodiment, since one side plate 254 is formed smaller than the side surface shape of the transport belt 276, this operation can be performed. Even if the side plate 254 is lifted from the gantry 258, the side plate 256 only needs to be lifted to such an extent that the conveyor belt 276 can be removed. Side plate 256
Is not loosened. Further, it is not necessary to loosen the fixing bolt 262 of the side plate 256.

Next, the handle 290 is rotated in the reverse direction to displace the outer end of the shaft extension rod 282 downward as shown in FIG. 7E, and the outer end is placed on the upper surface of the gantry 258. Let it. Thereafter, as shown in FIG.
84 is removed from the shaft extension bar 282. Thereafter, the conveyor belt 276 is removed from the shaft extension rod 282 (the above steps are the third step according to claim 4 and the fifth step according to claim 5).
Process).

Next, in a manner reverse to the above, the work of mounting a new transport belt for replacement is performed. That is, first,
A transfer belt for replacement is wound around the pair of shaft extension rods 282. Thereafter, the support rod 284 is attached to the shaft extension rod 282 again, and by rotating the handle 290, the outer end of the shaft extension rod 282 is displaced upward again via the support rod 284. Then, in this state, the transfer belt for replacement is mounted on the pair of driving pulleys 272 and driven pulleys 274 (this step corresponds to the sixth step of the fifth aspect).
Next, the handle 290 is rotated in the opposite direction so that the support rod 28 is rotated.
4, the outer end of the shaft extension rod 282 is displaced downward, and the floating side plate 254 is placed on the gantry 258 (the fourth step and the fourth step are the above steps). 5 corresponds to the seventh step). Next, the shaft extension rod 282 is disengaged from the connection portion 294 of the drive side pulley shaft 264 and the connection portion 296 of the driven side pulley shaft 266, respectively, and the belt tension screw 278 is rotated to apply a predetermined tension to the transport belt after replacement. (This step corresponds to the eighth step in claim 5). Finally, the side plate 254 is fixed to the upper surface of the gantry 258 again by the fixing bolt 262 (this step corresponds to the fifth step according to claim 4 and the ninth step according to claim 5).

As described above, in the present embodiment, in the belt conveyor device 250, one side plate 254 is formed to have a size capable of extracting the transport belt 276, and
Connecting portions 294 and 2 are connected to the outer end of the driving pulley shaft 264 and the outer end of the driven pulley shaft 266 located on the side plate 254 side.
96, and the transfer belt exchange device 252 including the shaft extension rod 282 and the support rod 284 can be attached to the belt conveyor device 250 having the above-described configuration, so that the transfer belt 276 of the belt conveyor device 250 can be easily configured. Can be exchanged. Therefore, unlike the related art, there is no need to perform an operation of turning the entire belt conveyor device upside down and an operation of removing one side plate portion. As a result, if the transfer belt replacement device 252 according to the present embodiment is also applied to the belt conveyor device 250 according to the present embodiment, the labor required for replacing the transfer belt 276 can be reduced.

Further, according to the present embodiment, the support rod 28
Since the exchange operation of the conveyor belt 276 is performed using the conveyor belt exchanging device 252 including the step 4, the external end of the shaft extension bar 282 does not need to be manually lifted or lowered. As a result, if the transfer belt replacement method according to the present embodiment is used by using the transfer belt replacement device 252 according to the present embodiment, the labor for replacing the transfer belt 276 can be further reduced. .

In this embodiment, the outer end of the shaft extension rod 282 is supported by the support rod 284 so as to be able to move up and down. However, the present invention is not limited to this. You may do so. In this case, the support rod 28
4. Since members such as the adjustment bolt 288 and the handle 290 are not required, the transfer belt can be easily replaced.

The support portion 28 at the upper end of the support rod 284
4A and the outer end of the shaft extension rod 282 may be connected by a joint having a lock mechanism. When this configuration is adopted, for example, when removing the transfer belt 276 and installing a new transfer belt for replacement, the support rod 284 is rotated by 90 degrees around the joint and locked when it becomes coaxial with the shaft extension rod 282. If it is fixed by a mechanism, the operation of removing the support rod 284 from the shaft extension rod 282 can be eliminated.

Further, in this embodiment, the support rod 284 is raised and lowered using the handle 290 and the adjustment bolt 288. However, the present invention is not limited to this. A pinion system may be employed, and any configuration is applicable as long as the support bar 284 can be raised and lowered.

In this embodiment, one side plate 254 is used.
Only the size is reduced so that the transfer belt 276 can be extracted and attached. However, only the other side plate 256 may be reduced in size, or both side plates 254 and 256 may be reduced in size. Note that connecting portions 294 and 296 are formed at the outer ends of the drive-side pulley shaft 264 and the driven-side pulley shaft 266 on the side plates 254 and 256 that are made smaller.

Further, in this embodiment, the channel steel is used as the side plate, but the concept of the side plate includes various members other than the channel steel.

In this embodiment, the driving pulley shaft 2
64, the connecting portions 294 and 296 are formed by extending one end of the driven pulley shaft 266. However, the present invention is not limited to this.
Any configuration that can connect the pulley shaft extension member is applicable.

Further, in the present embodiment, the case where the belt conveyor device 250 is used in the system for producing a seedling culture medium has been described as an example, but the present invention is not limited to this, but can be applied to a wide range. Applicable.

[0082]

As described above, in the belt conveyor device according to the first aspect of the present invention, at least one of the pair of side plate portions is formed in a size capable of extracting the conveyor belt. Since a connecting portion for connecting a pulley shaft extending member is provided at an end of the pulley shaft located on the side plate portion on the belt extracting side, the entire belt conveyor device conventionally required to be rolled over (inverted). ), And the work of removing one side plate is unnecessary.
As a result, there is an excellent effect that the labor for replacing the conveyor belt can be reduced.

According to a second aspect of the present invention, an apparatus for exchanging a conveyor belt according to the present invention is applied to the belt conveyor apparatus according to the first aspect, is connectable to a connection portion, and has an axial length equal to or greater than the belt width of the conveyor belt. Therefore, the present invention has an excellent effect that it is possible to reduce the labor required for exchanging the conveyor belt.

According to a third aspect of the present invention, there is provided the transfer belt exchanging device according to the second aspect, wherein the pulley shaft extension member is supported near the end on the side opposite to the connecting portion so that the height can be adjusted. Since the member is provided, there is no need to manually lift or lower the vicinity of the end of the pulley shaft extension member on the side opposite to the connection portion, and as a result, the labor for replacing the transport belt is further reduced. It has an excellent effect that it can be performed.

According to a fourth aspect of the present invention, there is provided a method of exchanging a conveyor belt, comprising: a first step of releasing a fixing state of a side plate portion on a belt extracting side to a gantry; and extending a pulley shaft to a connecting portion of a pair of pulley shafts. A second step of connecting the members, a third step of displacing the end of the pulley shaft extension member on the side opposite to the connecting portion upward, and then withdrawing the transport belt from the pair of pulleys; After the pulley is mounted on the pulley, a fourth step of displacing the end of the pulley shaft extension member on the side opposite to the connecting portion downward and mounting the side plate portion on the belt extracting side on the gantry, And a fifth step of fixing, so that it is not necessary to perform the operation of turning the entire belt conveyor device (inverting) and the operation of removing one of the side plates, which are conventionally required, and as a result, exchange the transport belt. Light work effort It has an excellent effect that it is possible to.

According to a fifth aspect of the present invention, there is provided a method of exchanging a conveyor belt according to the present invention, wherein a first step of releasing a fixing state of a side plate portion on a belt extracting side to a gantry, and applying a predetermined tension to the conveyor belt. A second step of loosening the tension by operating the tension applying means, a third step of connecting the pulley shaft extending member to the connecting portion of the pair of pulley shafts, and the vicinity of the end of the pulley shaft extending member on the side opposite to the connection portion A fourth step of displacing the end of the pulley shaft extending member on the side opposite to the connecting portion upward using the bearing member attached to the pulley shaft extending member, and then moving the transport belt toward the pulley shaft extending member side; After displacing the end of the pulley shaft extension member on the side opposite to the connection portion downward to place the side plate portion on the gantry, the support member is detached from the pulley shaft extension member, and the transport belt is pulled up by the pulley shaft extension member. 5th process to remove from the After the feed belt is wound around the pair of pulley shaft extension members, the support member is attached to the pulley shaft extension member again, and the end of the pulley shaft extension member on the side opposite to the connection portion is displaced upward using the support member. After that, the sixth step of mounting the exchange conveyor belt on the pair of pulleys, and displacing the end of the pulley shaft extension member on the opposite side of the connecting member downward by using the support member to place the side plate on the gantry A seventh step of placing,
An eighth step of disengaging the pulley shaft extending member from the connection portion of the pulley shaft, and applying a predetermined tension to the exchanged conveyor belt using the tension applying means, and a ninth step of fixing the side plate portion to the gantry again, This eliminates the need for the conventional belt conveyor device to be turned over (overturned) and the operation to remove one of the side plates, which further reduces the labor required for replacing the conveyor belt. It has an excellent effect that it can be performed.

[Brief description of the drawings]

FIG. 1 is an overall process diagram of a system for producing a seedling culture medium according to an embodiment.

FIG. 2 is an external perspective view of a seedling culture medium manufactured by the seedling culture medium manufacturing system according to the embodiment.

FIG. 3 is a schematic diagram showing a state of a binder (core-sheath type fiber) after compression molding.

FIG. 4 is a cross-sectional view showing a use state of the seedling culture medium manufactured by the seedling culture medium manufacturing system according to the present embodiment.

FIG. 5 is a perspective view showing the overall configuration of the belt conveyor device according to the embodiment.

FIG. 6A is a front view showing a transport belt exchanging device with a part cut away, and FIG. 6B is a side view thereof.

FIG. 7 is a process chart showing the first half of the process of exchanging the conveyor belt according to the embodiment.

FIG. 8 is a perspective view showing an overall configuration of a belt conveyor device according to a conventional example.

FIG. 9 is a process diagram showing a transfer belt replacement process in the case of a conventional example.

[Explanation of symbols]

 250 Belt conveyor device 252 Conveyor belt exchange device 254 Side plate 256 Side plate 258 Stand 260 Stand 264 Drive pulley shaft 266 Follower pulley shaft 272 Drive pulley 274 Driven pulley 276 Transport belt 280 Tension applying mechanism (tension applying means) 282 pulley Shaft extension member 284 Support rod (support member) 288 Adjust bolt (support member) 290 Handle (support member) 294 Connection part 296 Connection part

Claims (5)

[Claims] 1. A pair of side plates arranged substantially in parallel and removably fixed to a frame, and a pair of side plates spaced apart in the longitudinal direction of the side plates and supported by the pair of side plates, respectively. A belt conveyor device including a pulley shaft, a pair of pulleys supported on each pulley shaft, and a transport belt wound around the pair of pulleys, wherein at least one of the pair of side plate portions is provided. Is formed in such a size that the conveyor belt can be extracted, and a connection portion for connecting a pulley shaft extension member is provided at an end of the pulley shaft located on the side plate portion on the belt extraction side. A belt conveyor device, comprising: 2. A pulley shaft extending member which is applied to the belt conveyor device according to claim 1 and is connectable to the connection portion, and includes a pulley shaft extending member having a shaft length equal to or greater than a belt width of the transport belt. An apparatus for exchanging a conveyor belt. 3. The transport belt exchanging device according to claim 2, further comprising a support member for supporting the vicinity of the end of the pulley shaft extension member on the side opposite to the connection portion so that the height can be adjusted. 4. A first step of releasing a fixing state of the side plate portion on the belt extracting side to the gantry, a second step of connecting the pulley shaft extending member to the connection portion of the pair of pulley shafts, After displacing the vicinity of the end of the shaft extension member on the side opposite to the connection portion upward, the third step of extracting the transport belt from the pair of pulleys, and attaching a replacement transport belt to the pair of pulleys,
A fourth step of displacing the vicinity of the end of the pulley shaft extension member on the side opposite to the connection section downward to place the side plate portion on the belt extracting side on the gantry, and a fifth step of fixing the side plate portion to the gantry again A method for exchanging a conveyor belt, comprising: 5. A first step of releasing a state in which the side plate portion on the belt extracting side is fixed to a gantry, and loosening the tension by operating a tension applying means for applying a predetermined tension to the transport belt. A second step, a third step of connecting the pulley shaft extension member to the connection portion of the pair of pulley shafts, and a support member mounted near an end of the pulley shaft extension member on the side opposite to the connection portion. A fourth step of displacing the vicinity of the end of the pulley shaft extension member on the side opposite to the connection portion upward, and then moving the transport belt to the pulley shaft extension member side; A fifth step of displacing the side plate portion on the gantry by displacing the vicinity of the end on the connection portion side downward and detaching the support member from the pulley shaft extension member and removing the transport belt from the pulley shaft extension member; Replace the transfer belt with a pair After the support member is attached to the pulley shaft extension member and the support member is used to displace the vicinity of the end of the pulley shaft extension member on the side opposite to the connection portion upward, the support member is displaced upward. A sixth step of mounting the exchange conveyor belt on the pair of pulleys, and displacing the end near the opposite end of the pulley shaft extension member on the opposite side of the pulley shaft extension member using the support member to place the side plate portion on the gantry A seventh step of disengaging the pulley shaft extending member from the connection portion of the pulley shaft, and applying a predetermined tension to the exchanged conveyor belt using the tension applying means, and fixing the side plate portion to the gantry again 9. A method of exchanging a conveyor belt, comprising: