JP2005239337A - Screw feeder device for pressed loading - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem or the like wherein, while quantitatively filled leaf molds or the like are stacked and stored after filling, they are compressed in a bag, a space occurs in the bag, and lack of weight occurs, and to provide its device. <P>SOLUTION: The pre-stage device compresses the sufficiently stirred leaf molds and/or composts to a predetermined bulk density before filling into the bag or the like and then fills the compressed leaf molds or the like into the bag or the like. The compressing device is the screw feeder device, and has a horizontal type screw case and a conveying screw inside the screw case. The front part of the screw is engaged and fixed to the outer periphery of the blade of the screw, and pivoted by a ring turning integrally with the screw. The screw feeder device has a guide roller that supports the outer periphery of the ring and is pivoted turnably, and a nozzle of different diameter is disposed in the front of the screw case. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a method of filling a mulch or the like after compressing to a predetermined volume before filling the bag, and relates to a structure of a screw feeder that uses a screw feeder to compress and convey the compressed bulk density within the screw feeder.

In general, as a method of supplying a fixed amount of humus, etc. and filling a bag, etc., the humus is loosened on a belt conveyor and conveyed at a constant layer thickness at a low speed, and a predetermined amount is cut out by determining the moving distance of the conveyor belt. There is a way. However, there are lumps of humus and the like, and it is necessary to install various devices to loosen them up evenly. Nevertheless, there is a problem that it takes too much time to obtain a predetermined layer thickness and the efficiency is poor.

Even if the fixed amount is filled in this way, if the filled bags are stacked and stored, they are compressed again in the bags to form a lump. This lump varies from bag to bag and becomes a large lump or a relatively small lump, and various spaces are generated in the bag. It seems that the contents differ greatly from bag to bag. From the user's point of view, it may be an important problem related to the credibility of the manufacturer.

JP 2001-329269 A

Therefore, instead of unpacking and filling articles that become a lump when compressed like mulch, it is better to pack after compressing to a predetermined bulk density in the filling stage, and instead of using a belt conveyor method We focused on the method of compressing humus using a screw feeder. Conventionally, a method of increasing the bulk density by compressing a conveyed product with a screw feeder has been practiced. For example, there is one introduced in Patent Document 1. In this method, the object to be conveyed is compressed by reducing the pitch of the screw blades from the rear to the front of the screw. However, there is a problem that humus is blocked by this method and is not compressed and discharged without stopping the screw.

JP 2000-344347 A

There is also a screw feeder introduced in Patent Document 2. This method can be said to be a relatively suitable structure as a method for conveying humus and the like. However, humus soil has a nature that it is easy to adhere and stick because it contains leaves, twigs and soil and contains moisture. For this reason, if it sticks to the blade of the screw, the screw will run out of the core. This is due to a gap between the outer diameter of the screw and the inner diameter of the screw case, but this gap is generally indispensable. . Therefore, this core runout is not so much a problem when the screw rotation is slow (for example, about 10 rpm), but the screw core runout becomes remarkable when the rotation is relatively fast (for example, about 60 to 100 rpm). Besides, the wear of the screw is remarkable. This is because the screw shaft is pivotally supported only at the rear, and it is considered that it is not so much a problem with powder particles. However, in the case of humus, the possibility of damaging the screw is extremely high.

JP 2003-306221 A

Then, there exists a screw conveyor which is introduce | transduced by patent document 3 as a structure considered that such a core runout of a screw can be prevented. In this method, the screw shaft is extended forward and the shaft end is pivotally supported by a bearing or the like. That is, both ends of the screw shaft are pivotally supported by bearings. In this structure, the screw does not run out, but the discharge direction of the object to be conveyed is deflected by 90 degrees, and in the case of mulch soil etc. that is compressed and conveyed, the clogging occurs near the discharge port and it is not smoothly discharged. There was a problem.

JP-A-5-201517

In order to solve such various problems, there is a method of preventing the runout of the screw by pivotally supporting the outer periphery of the rotating screw. Patent Document 4 introduces an intermediate support method for supporting the outer periphery of a screw blade against a screw case (outer cylinder) at a midway position in the longitudinal direction of the screw conveyor. However, this method is considered to achieve its purpose when conveying the object straight without compressing it, but when compressing and transporting humus, etc., the compressed humus is connected to the connecting flange of the screw shaft. It gets caught in and closes. In this method, since the ring body and the screw shaft are connected by the reinforcing rib, humus or the like is caught by the reinforcing rib and closed.

JP-A-11-147608

Further, Patent Document 5 introduces a technique for avoiding a trouble that the object to be conveyed is clogged by the resistance at the bearing. In this method, a bearing material is mounted on the outer periphery of the blade of the screw so that the bearing material is in contact with the casing. However, even if it is a bearing material, if it always rotates in contact with the casing, wear occurs, and there is power loss due to friction, resulting in poor operating efficiency.

First of all, to solve the problem that a fixed amount of humus or the like is compressed in the bag while being stacked and stored after filling, and a space is created in the bag, resulting in a shortage of quantity. And even if the device as the solution is applied to a device that compresses and transports humus etc. with these technologies that have been implemented so far, the rotation of the humus etc. is stopped because it is clogged in the screw case. Once the screw stops, it takes a lot of labor and time to recover. Further, in the structure in which the rotation of the screw is received by friction, there is a problem that the blades and casing of the screw are worn in a short time due to the soil contained in the humus and the like, and improvement has been desired.

The present invention is an apparatus for compressing and filling to a predetermined bulk density before filling a bag or the like, and intends to solve the problems of the conventional apparatus, and transports humus soil while compressing it. It is an object of the present invention to provide a screw feeder that is easy to maintain and durable, and is a screw feeder with good conveyance efficiency that can obtain a predetermined degree of compression continuously.

A compression device according to the present invention is a screw feeder device, which is a screw type conveying device provided with a horizontal screw case having an input port at the rear and having a discharge port at the front, and a conveying screw inside the screw case. The rear of the main shaft of the screw is pivotally supported by a bearing, and the front of the screw is fitted and fixed to the outer periphery of the blade of the screw, and is pivotally supported by a ring that rotates integrally with the screw. And at least three guide rollers rotatably supported to support the outer periphery of the ring, and a guide roller flange for mounting the guide roller is provided at the front end of the screw case. A nozzle having an inlet having the same diameter as the inner diameter of the screw case and having an outlet smaller than the inlet. By connecting mounted on Idorora flange, humus and / or compost is discharged after being compressed to a predetermined bulk density and compression filling screw feeder apparatus characterized by filling the bag such a predetermined capacity. (Claim 1).

The nozzle connected to the flange for the guide roller is a nozzle that can be compressed to a predetermined bulk density by changing the ratio of the opening cross-sectional area of the outlet and the outlet that is smaller than the inlet. It is characterized by that. (Claim 2).

The screw blade of the screw feeder according to claim 1 is a double blade. (Claim 3).

According to the present invention, a method for compressing mulch that has been sufficiently stirred before filling into a bag or the like to a predetermined bulk density and then filling the bag or the like has been developed. There is an effect that an unnecessary space is not formed in the space, and even if it is passed to the user, it is not seen as if it is insufficient. Further, in terms of the structure, the screw feeder of the present invention has such a configuration, so that even a mulch with twigs and soil mixed therein is sent out with a predetermined degree of condensation, so that a certain volume of mulch is obtained. In addition, the pitch of the blades of the screw is made uniform and the opening area of the discharge port of the nozzle at the tip is made smaller than the cross-sectional area of the screw case so that the humus is compressed while being transported. A compressed surname can be obtained, and there is an effect that it can be conveyed with a stable capacity. In particular, from the standpoint of maintenance, disassembly and assembly can be easily performed, so that the labor for maintenance inspection of the screw feeder can be reduced.

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing almost the whole of the screw feeder of the present invention, and is shown as a cross-sectional view for explanation. However, the screw driving device is omitted because various conventional methods can be applied. FIG. 2 shows the main part of the present invention, which is similarly shown as a sectional view, and shows the front part of the screw feeder. FIG. 3 is an AA arrow view shown in FIG. Reference numeral 1 denotes an input port which is integrally formed with the screw case 2. 3 is a rear bearing, 4 is a screw, 5 is a screw shaft, 6 is a blade of a screw, 7 is a flange for a guide roller, 8 is a ring, 9 is a guide roller, 10 is a guide roller pin, 11 is a nozzle, 12 is a nozzle flange , 13 is a nozzle inlet, 14 is an outlet, and 15 is a nozzle mounting bolt.

The operation of the screw feeder apparatus of the present invention in FIG. 1 will be described. It is assumed that the screw 4 is rotated by a driving device (not shown) in a predetermined direction by the screw shaft 5. When humic soil or the like is introduced from the inlet 1, the humic soil is conveyed in the direction of the arrow by a lead L shown in the drawing. Then, it reaches the front of the screw and fills the internal space 11 a of the nozzle 11. The internal space 11 a of the nozzle 11 has a nozzle inlet 13, a part of a parallel portion 11 b having the same diameter as the inlet, an outlet 14 smaller than the nozzle inlet 13, and the same diameter as the outlet 14. And a tapered portion 11d formed by the difference between the diameter of the input port 13 and the diameter of the discharge port 14, and the humus soil and the like conveyed one after another is this portion. Is compressed to a predetermined bulk density. The compressed humus or the like is molded into the diameter of the discharge port 13 and discharged. The discharged humus or the like is appropriately cut into a size that can be filled in a bag, and a predetermined amount of the cut is packaged and packaged.

Next, a structure in which the screw does not cause runout will be described. As shown in FIG. 2, this screw is called a double blade and is provided with blades with a pitch difference of 180 degrees between the pitches of the screw blades. The screw is wound so that the phase angle is different by 180 degrees. is there. The purpose of doing this is to make it as dense as possible because there are sparse and dense places in the screw feeder in a normal conveying state like mulch. By making double wings, the ring fitted and fixed to the screw blade has a longer contact distance between the outer periphery of the blade and the inner periphery of the ring, and the blade and ring are securely fixed.

The screw 4 and its ring 8 formed in this way are pivotally supported as a rolling contact by a guide roller 9 that is rotatably fitted to a guide roller pin 10 attached to a guide roller flange 7. As a result, the front of the screw can rotate smoothly without causing runout. The nozzle 11 is attached to the guide roller flange 7 with a mounting bolt 15 by a nozzle flange 12.

The length of a part of the parallel part 11b having the same part as the inlet 13 of the nozzle shown in FIG. 3 is preferably at least equal to the lead length L of the screw. The length of the taper portion 11c formed by the difference between the diameter of the nozzle inlet 13 and the diameter of the outlet 14 is preferably at least the length of the lead length L of the screw.

In the embodiment of the present invention, a single screw feeder is used. However, two double row screw feeders may be used. In this case, a plurality of the present embodiment may be arranged in parallel. The part 1 is common, and two screw cases 2 are provided in the lower part at a predetermined interval so as to be integrated with the inlet part, so that the article to be conveyed is divided into two screws inside the inlet. It can also be. Also, the guide roller flange portion in front of the screw case interferes with the adjacent two screw cases, so that either of them can be shifted back and forth. A frame for integrally connecting the two screw feeders can also be provided.

It is a side view of the screw feeder of the present invention. It is sectional drawing which showed the principal part of the screw feeder of this invention. It is an AA arrow line view shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Input port 2 Screw case 3 Rear bearing 4 Screw 5 Screw shaft 6 Screw blade 7 Guide roller flange 8 Ring 9 Guide roller 10 Guide roller pin 11 Nozzle 12 Nozzle flange 13 Nozzle input port 14 Discharge port 15 Nozzle mounting bolt

Claims (3)

A screw type conveying device having a horizontal screw case of the same inner diameter having a charging port at the rear and a discharging port at the front and a conveying screw inside the screw case, the main shaft rear of the screw being pivotally supported by a bearing The front of the screw is pivotally supported by a ring that fits and is fixed to the outer periphery of the blade of the screw and rotates integrally with the screw, and is rotatably supported to support the outer periphery of the ring. At least three guide rollers are provided, and a guide roller flange for mounting the guide roller is provided at the front end of the screw case, and has an inlet having the same diameter as the inner diameter of the screw case. A device characterized in that a nozzle having a small discharge port is connected and mounted to the guide roller flange. Previously it was compressed-determined bulk density, compression filling screw feeder apparatus characterized by filling the predetermined volume in a bag or the like compost. 2. The screw feeder for compression filling according to claim 1, wherein the nozzle connected to the flange for the guide roller changes the ratio of the opening cross-sectional area of the nozzle inlet and the outlet smaller than the inlet. A screw feeder device for compression filling, comprising a nozzle that can be compressed to a predetermined bulk density. The screw feeder for compression filling according to claim 1, wherein the blade of the screw constituting the screw feeder is a double blade.

Images