JPH04317917A - Screw conveyor apparatus - Google Patents

Abstract

PURPOSE:To easily pull out a screw from a casing so as to improve the work efficiency by projecting the output side end portion of a driving shaft inside a casing to be engaged with one end of a screw shaft portion, and supporting and sealing only the other end side of the shaft by the second bearing and a seal member. CONSTITUTION:In case of taking out a screw 12 from a casing 1, a mounting member 21 where the second seal member 22 and the second bearing 8 are installed is detached from an annular member 23, and the screw 12 is pulled out toward the side of an outlet 4 side of the casing 1, whereby one end 13a of a shaft portion 13 of the screw 12 is separated from the output side end portion 11a of a driving shaft 11 so as to easily take out the screw. During the rotation of the screw 12, a blade portion 2b of the screw 12 is subjected to the reaction force of feeding out a transported article to the outlet 4 side and energized in the direction of adhering to the shaft 11, so that the screw 12 is prevented from moving in the direction of separating from the shaft 11.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw conveyor device that rotates a screw within a casing to send out objects.

0002

2. Description of the Related Art Generally, a conventional screw conveyor device has a structure shown in FIG. 6. That is, a screw 2 is installed inside a cylindrical casing 1,
An input port 3 is opened at the upper surface of one end of the cylindrical portion 1a of the casing 1, and an outlet port 4 is opened at the lower surface of the other end of the cylindrical portion 1a of the casing 1. The material to be conveyed, such as powder or granular material, supplied from the input port 3 is sent out to the discharge port 4 of the casing 1 by rotation of the screw 2 inside the casing 1.

Bearings 7 and 8 are attached to both side walls 1b of the casing 1 via attachment members 5 and 6 that extend laterally, and these bearings 7 and 8 support the shaft 2 of the screw 2.
a is rotatably supported. Shaft 2 of screw 2
A sprocket, pulley, etc. (not shown) is attached to one end of a, and rotational force from a drive motor (not shown) is transmitted to the sprocket, pulley, etc., and the screw 2 is rotated. Furthermore, seal members 9 and 10 are provided at the center of both side wall portions 1b of the casing 1 through which the shaft portion 2a of the screw 2 is inserted.
This seals the transported objects from leaking to the outside from both side walls 1b of the casing 1.

0004

[Problems to be Solved by the Invention] However, according to the screw conveyor device having the above-mentioned conventional structure, when an object to be conveyed or the like gets stuck between the blade portion 2b of the screw 2 and the casing 1, or during inspection work, etc. When taking out the screw 2 from the casing 1, the bearings 7, 8 and the seal members 9, 10 on both sides must be removed, which takes time and effort, leading to a decrease in work efficiency.

[0005] The present invention solves the above-mentioned problem, and aims to provide a screw conveyor device that can take out the screw from the casing without much effort or time.

[0006]

[Means for Solving the Problems] In order to solve the above problems, the screw conveyor device of the present invention has a drive shaft that transmits rotational driving force to the screw, which is fitted into and removed from one end of the shaft of the screw in the axial direction. A concave portion and a convex portion for transmitting rotational driving force from the drive shaft to the screw are formed in correspondence with each fitting portion of the shaft portion of the screw and the drive shaft, and are provided on one side of the casing. The drive shaft is rotatably supported by the first bearing, the first seal member provided on the inner side of the casing than the first bearing is brought into close contact with the drive shaft, and the end of the drive shaft is placed inside the casing. One end of the screw shaft is fitted into the protruding part, and the other end of the screw shaft is rotatably supported by a second bearing provided on the other side of the casing. A second seal member provided on the inner side is brought into close contact with the other end of the shaft portion of the screw.

[0007]

[Operation] With the above configuration, when the screw is taken out from the casing, the second seal member and second bearing provided on the other side of the casing are removed, and the screw is moved toward the other side of the casing. All you have to do is pull it out.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In addition, items with the same functions as before are given the same symbols.
The explanation will be omitted.

In FIG. 1, reference numeral 11 denotes a drive shaft that transmits rotational driving force from a drive motor (not shown) to the screw 12. As shown in FIG. One end 13 of the shaft portion 13 of the screw 12
As shown enlarged in FIGS. 2 and 3, a hole 14 is formed along the axial direction of the hole 14, and the output side end 11a of the drive shaft 11 (FIGS. 4 and 5) is inserted. A key 15 extending in the axial direction is screwed to the output end 11a of the drive shaft 11, and a groove 16 is formed in the hole 14 of the shaft 13 of the screw 12 correspondingly. ing.

A pair of first bearings 18 and 19 are attached to the side wall portion 1b of the casing 1 on the side of the inlet 3 via a laterally extending attachment member 17.
The drive shaft 11 is rotatably and stably supported by 8 and 19. The first seal member 20, which is disposed at the center of the side wall 1b of the casing 1 on the side of the input port 3, is in close contact with the drive shaft 11 to prevent the objects to be transported from leaking to the outside.

Further, a second bearing 8 is attached to the side of the casing 1 on the side of the outlet 4 via a mounting member 21 that forms a side wall of the casing 1 on the side of the outlet 4 and extends laterally. The other end 13a of the shaft portion 13 of the screw 12 is rotatably supported by this bearing 8. A second seal member 22 disposed at the center of the mounting member 21 on the inner side of the casing 1 is attached to the shaft portion 13 of the screw 12.
The other end 13a is in close contact with the other end 13a to prevent the transported object from leaking to the outside. Note that 23 is an annular member fixed to the end of the casing 1 on the input port 4 side, and the mounting member 21 is attached with a screw (not shown).

With the above configuration, when the screw 12 is taken out from the casing 1, the mounting member 21 to which the second seal member 22 and the second bearing 8 are attached is removed from the annular member 23, and the screw 12 is removed from the casing. One end 13a of the shaft portion 13 of the screw 12 is detached from the output side end 11a of the drive shaft 11 by simply pulling it out toward the side toward the discharge port 4 side of the screw 12, and the screw 12 can be easily taken out without any effort or time. Able to perform work.

Further, when the screw 12 rotates, the blade portion 2b of the screw 12 receives a reaction force that sends out the conveyed object toward the discharge port 4, and is urged in the direction of closely contacting the drive shaft 11. is the drive shaft 11
It does not move in a direction away from.

[0014] It is also possible to arrange the drive shaft on the discharge port side of the casing, but in this case, the screw tends to move in the direction of detachment from the drive shaft due to the reaction force from the conveyed object. A regulating part must be provided on the inlet side of the casing.

Further, in the above embodiment, a configuration is shown in which the rotational driving force from the drive shaft 11 is transmitted to the screw 12 using the key 15 and the groove portion 16, but the present invention is not limited to this. The concave portions and convex portions that fit together may be formed in correspondence with each other.

[0016]

As described above, according to the present invention, a drive shaft for transmitting rotational driving force to the screw is provided, and the output side end of the drive shaft is made to protrude inside the casing, so that one end of the shaft portion of the screw is provided. , and only the other end of the screw shaft is supported and sealed by the second bearing and the seal member, so when the screw is taken out from the casing, the second seal member and the second
The screw can be easily pulled out of the casing by simply removing the bearing, which saves time and effort and improves work efficiency.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of a screw conveyor device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of the screw of the same screw conveyor device.

FIG. 3 is an end view of the screw of the same screw conveyor device.

FIG. 4 is a partially cutaway front view of the drive shaft of the same screw conveyor device.

FIG. 5 is an end view of the drive shaft of the same screw conveyor device.

FIG. 6 is a front sectional view of a conventional screw conveyor device.

[Explanation of symbols]

1 casing 3
Inlet port 4 Outlet port 8 Second bearing 11
Drive shaft 12 Screw 13 Shaft 14 Hole 15 Key 16 Groove 18, 19 First bearing

Claims (1)

[Claims] Claim 1: In a screw conveyor device that rotates a screw installed in a cylindrical casing to send out a conveyed object, the drive shaft that transmits rotational driving force to the screw is axially aligned with respect to one end of the shaft of the screw. The shaft of the screw and the fitting part of the drive shaft are respectively formed with corresponding recesses and protrusions for transmitting the rotational driving force from the drive shaft to the screw. The drive shaft is rotatably supported by a first bearing provided in the casing, and a first seal member provided on the inner side of the casing than the first bearing is brought into close contact with the drive shaft, and the end of the drive shaft is attached to the casing. The other end of the screw shaft is rotatably supported by a second bearing provided on the other side of the casing. A screw conveyor device in which a second seal member provided on the inner side of the casing is brought into close contact with the other end of the shaft portion of the screw.