JPH03122393A - Screw shaft equipped with stirring function - Google Patents

Abstract

PURPOSE:To transfer a subject to be transferred while stirring the subject by winding the blade of a band plate around the outer periphery of each rotary shaft in such a manner that the blade invades the locus of rotation of the outer peripheral edge of the band plate, and forming a space between the upper and lower portions of the spiral portion of the band plate. CONSTITUTION:A screw shaft comprises three rotary shafts 1 and a driving device 4 etc. Each rotary shaft 1 comprises a lot portion 5, a stirring transfer portion 6 and a drilling portion 7. A band plate 2 is alternately provided in the axial direction to the stirring portion 6 of each of the three rotary shafts 1, and the locus of rotation of the outer peripheral edge of each band plate 2 is so formed to invade the locus of rotation of the other outer peripheral edge. A spiral portion 2c having a space K between spiral portions 2a and 2b is formed in the band plate 2. When each of the rotary shafts 1 rotates a subject to be transferred is pressed and transferred by the spiral portions 2a and 2c, and is constantly sheared by the wall constitution of the space K. The subject to be transferred is thus transferred while being stirred.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The invention of this application relates to a screw shaft equipped with a stirring function used in a hole drilling machine or the like.

[Conventional technology]

Generally, a screw shaft is equipped with a spiral blade formed by wrapping a band-shaped plate around the outer peripheral surface of the rotating shaft, and this spiral blade connects a large number of unit spiral bodies formed by notched annular plates. It is configured by letting

Such a screw shaft is used, for example, in a drilling machine for forming a hole in the ground, and in this case, earth and sand excavated by a bit is transported upward by a spiral blade.

That is, as the rotary shaft rotates, the excavated earth and sand is transferred under pressure by the plate surface of the spiral blade.

Therefore, since the excavated earth and sand are continuously transported upward, the drilling work with the above-mentioned bit is not hindered by the earth and sand that was excavated earlier, and the drilling efficiency is excellent. becomes.

However, in a hole drilling machine, it is necessary to stir the excavated earth and sand and cement milk, so when the above-mentioned screw shaft is used in a hole drilling machine, in addition to the threaded feathers, the outer circumferential surface of the rotating shaft must be shall be equipped with stirring means such as a stirring rod.

On the other hand, there is a screw conveyor that uses the above-mentioned screw shaft, but when it is necessary to transport two or more types of powder and granules and at the same time stir the powder and granules in the trough, a spiral blade is used. Separate stirring means is required.

That is, in the case of the embodiments that require stirring as described above, in any case, a stirring means is required in addition to the spiral blade, and therefore the structure of the screw shaft as a whole is complicated. [Problem to be solved by the invention] Therefore, this invention uses only blades composed of band-shaped plates,
It is an object of the present invention to provide a screw shaft that transports a material to be transported such as powder and granules, and stirs the material during the transport.

[Means to solve the problem]

Therefore, in order to solve the above-mentioned problem, in the invention as set forth in claim 1 of this application, a belt-shaped plate (2) is wound around the outer periphery of a rotating shaft (1), and the belt-shaped plate ( 2) but
a spiral portion (2a) fixed to the outer circumferential surface of the rotating shaft (1); A spiral part (2b) fixed to the outer peripheral surface of (1), and at least one of the terminal end of the spiral part (2a) and the starting end of the spiral part (2b) is folded back to form a folded part. and these end portions are connected to each other in such a manner that a gap (K) is formed between the inner surface of the folded portion and its vicinity and the outer peripheral surface of the rotating shaft (1).

Further, in the invention according to claim 2 of this application, the rotating shaft (1)
A belt-shaped plate (2) is wound around the outer circumference of the rotary shaft (1), and the belt-shaped plate (2) includes a spiral portion (2a) fixed to the outer peripheral surface of the rotating shaft (1), and a spiral portion (2a) fixed to the outer peripheral surface of the rotating shaft (1). A spiral part (2a) and a spiral part (2a) disposed above the rotary shaft (1) at a constant interval in the axial direction and fixed to the outer peripheral surface of the rotary shaft (1).
2b), and the upper end of the spiral portion (2a) and the spiral portion (2a).
b) and a bent part (2c) connecting the lower end with a U-shaped cross section or a V-shaped cross section in such a manner that a gap (K) is formed between the rotating shaft (1) and the outer peripheral surface of the rotary shaft (1). It is said that

[Effect]

The invention of this application has the following effects.

■ Effect of the invention as claimed in claim 1 When the screw shaft of the invention as claimed in claim 1 of this application is adopted in a transfer device, the material to be transferred such as powder or granules is transferred to the spiral portion (2a
) and the spiral part (2c), and is transferred under pressure by the wall constituting the bent part located in the middle part between the spiral part (2a) and the spiral part (2c). Some transported objects will always be sheared.

■ Effect of the invention as claimed in claim 2 The screw shaft of the invention as claimed in claim 2 of this application is employed in an upright or inclined type transfer device, and when the rotating shaft (1) is rotated, the belt-like plate (2 ) in the spiral part (2a)
The object to be transferred, such as powder or granular material, located at the lower end of the spiral section (2a) is pressed and transferred from the lower end to the upper end of the spiral section (2a) by the plate surface of the spiral section (2a).

Then, the object transferred to the end of the spiral portion (2a) moves along a path from the upper surface of the lower end of the bent portion (2c) to the gap (K) to the lower side of the spiral portion (2a). In other words, the object to be transported will circulate along the route.

The material to be transported is continuously supplied to the lower end of the spiral portion (2a), and the filling rate of the material to be transported between the spiral portion (2a) and the spiral portion (2b) is increased. As the object increases, the transferred object is transferred from the lower end of the spiral portion (2a) to the upper surface of the lower end of the bent portion (2c) to the gap (K) = 4 spiral portion (2
The one moving in the lower path of a) and the spiral part (2a
) → the upper surface of the earthen wall forming the bent part (2c) → the lower end of the spiral part (2b) through the wall,
Separate and move. That is, the object to be transferred is agitated in such a manner that it is turned back by the lower surface of the earthen wall forming the bent portion (2c), and the agitated object is pressed and transferred upward.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below with reference to the drawings showing one embodiment.

In this example, the screw shaft of the present invention is applied to a multi-spindle drilling machine, and as shown in Fig. 1, a league (
A shaft rotation drive device (4) is attached to the upper part of the shaft rotation drive device (4), and three rotary shafts (1) (
1) is installed.

As shown in the figure, this rotating shaft (1) has a rond part (5).
), an agitation transfer section (6), and a drilling section (7), and the agitation transfer section (6) is constituted by the screw shaft of the present invention. And this rotation axis (1) is the above-mentioned league (
The intermediate steadying device (R1) fixedly arranged at the center of the league (R) moves the rondo section (5), and the lower steadying device (R2) fixedly arranged at the bottom of the league (R) moves the stirring transfer section (6). By rotatably supporting the intermediate portions of the groove and the hole drilling portion (7), the groove is provided parallel to the league (R).

The hole drilling section (7) is a well-known one, and as shown in Fig. 2, a spiral blade (7) is provided at the lower end.
0) (70) and a plurality of bits (71) (71) are provided at the lower edge of this. And the rotation axis (1)
Cement milk is spouted from a spout (72) formed at the lower end of the container.

In this embodiment, as shown in the same figure, an empty chamber (73) is provided upstream of the cement milk spout (72), and a ball is placed in this empty chamber (73) so as to be able to move up and down. (74), and due to the pressure difference, the spout (
When the fill cement flows back into the nozzle (11) from the nozzle (72), the ball (74) rises and the nozzle (
The communication port with the empty chamber (73) in 11) is placed in a "closed" state, thereby preventing clogging of the nozzle (11).

As shown in FIGS. 1 and 3, the stirring transfer section (6)
The belt-shaped plate (2) constituting the stirring transfer blade is connected to the rotating shaft (1).
a spiral portion (2a) fixed to the outer circumferential surface of the rotary shaft (1); A space is formed between the spiral part (2b) fixed to the outer peripheral surface of the rotating shaft (1) and the upper end of the spiral part (2a) and the lower end of the spiral part (2b) to the outer peripheral surface of the rotating shaft (1). (K), and is composed of a bent portion (2c) that connects with a U-shaped cross section or a seven-shaped cross section. The rotation trajectory of the outwardly protruding end of the bent portion (2c) is made to substantially match the rotation trajectory of the outer peripheral edge of the spiral portions (2a) and (2b).

As shown in Fig. 1, the above-mentioned belt-shaped plates (2) are provided alternately in the axial direction of the three rotating shafts (1), and each rotation Axis (1
) is arranged so that the rotation locus of the outer circumferential edge of the strip plate (2) at the rotation axis (1) intrudes into the rotation locus of the outer circumference edge of the strip plate (2) at the other rotating shaft (1).

Incidentally, when manufacturing this agitation transfer section (6), an S-shaped substrate (61) as shown in Fig. 4 may be used (
Specifically, the center part of the three letters of the board (61) is bent so that the upper and lower thank-you parts (60) (60) face each other, and the rotation axis (1) is attached to the thank-you parts (60) (60). ) is inserted, and the contact portion between the rotating shaft (1) and the letter of appreciation (60) may be fixed. Moreover, the shape of the bent part (2c) is as follows:
The cross section is not limited to a U-shaped cross section, and other shapes such as a 7-shaped cross section may be adopted.

When a hole is drilled using the above-mentioned hole drilling machine, a mixture of earth and sand and cement milk (hereinafter referred to as
(simply referred to as a mixture) is shown in FIG. 3 (a) of the rotating shaft (1).
) to (d), it circulates while being turned around by the earthen wall forming the bent portion (2c), as shown by the solid and broken lines in (a) of the figure.

As the filling rate of the mixture increases, the mixture moves along two routes, as shown by the solid line, the broken line, and the two-dot chain line in the figure. That is, this stirring transfer section (
In step 6), the mixture is transferred upward and stirred and mixed at the same time.

In this embodiment, the belt-shaped plate (2
) of the belt-shaped plate (2) of the other rotating shaft (1).
), the outermost periphery of the bent portion (2c) allows the strip plate (1) of each rotating shaft (1) to
The mixture located near the outer periphery of 2) will be vertically sheared, and the stirring and mixing function will be excellent.

Furthermore, since the rotation locus of the outward protrusion in the bent portion (2c) is made to substantially match the rotation locus of the outer periphery of the spiral portions (2a) (2b), the mixture is There is no overflowing from the outside of the outward projection and therefore no reduction in the efficiency of the mixture transfer. That is, there is no reduction in the drilling ability.

In this embodiment, the screw shaft of the present invention is employed in a hole drilling machine, but the present invention is not limited thereto, and may be employed in, for example, a vertical or inclined screw conveyor. In this case, if a plurality of granular materials are introduced at the starting end of the conveyor, the granular materials will be transferred to the terminal end side while being stirred and mixed.

Further, in the above embodiments, the object to be transferred is a mixture or powder, and is agitated and transferred, but the present invention is not limited to this, and may be used to agitate and transfer a fluid.

〔Effect of the invention〕

Since the invention of this application has the above-described configuration, it has the following effects.

■Effect of the invention claimed in claim 1 When the screw shaft of the invention claimed in claim 1 of this application is employed in a transfer device and the rotating shaft (1) is rotated, the spiral portion (2a) and the spiral portion ( 2c), the material to be transferred such as powder or granular material is transferred between the spiral part (2a) and the spiral part (2c).
2c) by the constituting wall of the bend located in the middle part of
Since the object is constantly sheared, the object to be transferred is transferred while being agitated.

■Effect of the invention as claimed in claim 2 When the screw shaft of the invention as claimed in claim 2 of this application is adopted in an upright or inclined type transfer device, and the rotating shaft (1) is in a rotating state, the helical part Lower end of (2a) → bent part (2
c) Lower end upper surface → gap (K) → conveyed materials such as powder particles circulated in the path on the lower side of the spiral portion (2a) are transferred to the upper end bending portion (2c) of the spiral portion (2a). The top surface of the earthen wall that makes up →
Since the object is transferred upward along the path from the upper surface of the lower end of the spiral portion (2b) to the upper end of the spiral portion (2b), the object to be transferred is transferred while being stirred.

Incidentally, since the object to be transferred is stirred in a manner in which it is turned by the lower surface of the upper wall constituting the bent portion (2c), the stirring function is excellent.

[Brief explanation of drawings]

Claims (1)

[Claims] 1. A belt-shaped plate (2) is wound around the outer periphery of a rotating shaft (1), and the belt-shaped plate (2) is attached to the rotating shaft (1).
a spiral portion (2a) fixed to the outer peripheral surface of the rotary shaft (1); The spiral part (2b) is fixed to the surface.
At least one of the terminal end of a) and the starting end of the spiral part (2b) is folded back to form a folded part, and these ends are connected to the folded part and the inner surface in the vicinity thereof, and the rotating shaft (
1) A screw shaft equipped with a stirring function characterized in that it is connected to the outer circumferential surface of item 1 in such a manner as to form a gap (K) therebetween. 2. A belt-shaped plate (2) is wound around the outer periphery of the rotating shaft (1), and the belt-shaped plate (2) is attached to the rotating shaft (1).
a spiral portion (2a) fixed to the outer circumferential surface of the rotary shaft (1); A space is formed between the spiral part (2b) fixed to the outer peripheral surface of the rotating shaft (1) and the upper end of the spiral part (2a) and the lower end of the spiral part (2b) to the outer peripheral surface of the rotating shaft (1). A screw shaft having a stirring function, characterized in that the screw shaft has a bending portion (2c) connected in a U-shaped cross section or a V-shaped cross section in a manner to form (K).