JP2019182629A - Screw type conveying device - Google Patents

Abstract

The present invention provides a non-axial screw-type transfer device capable of more smoothly and reliably transferring. A vertical conveyor having an axial screw for vertical conveyance arranged in a trough so that a rotation axis extends vertically, and a horizontal conveyor arranged in a trough such that a rotation axis extends in a horizontal direction. A horizontal conveyor having a non-axial screw, a screw-type conveying device that supplies an object to be conveyed by the horizontal conveyor to a lower portion of the vertical conveyor, and conveys the object toward a high place. In the connection between the vertical conveyor and the horizontal conveyor, the distance between the trajectory line of the tip of the axle screw for horizontal conveyance and the trajectory line of the outer diameter (r1) of the axle screw for vertical conveyance is different. The distance (d) of the shortest part is 0.25% to 40% of the outer diameter (r2) of the lateral conveyance screw, and is less than 150 mm. [Selection diagram] Fig. 1

Description

  The present invention relates to a screw-type conveyance device, and more particularly to a screw-type conveyance device suitable for conveying chips and the like discharged from a machine tool or the like.

  As a conventional screw type conveying device, for example, a screw type conveying device disclosed in Patent Document 1 is known. In this screw type conveying device, two screw type conveyors are arranged horizontally and vertically, respectively, so that an object to be conveyed supplied by a horizontal conveying screw is conveyed to a high place by a vertical conveying screw. It is configured.

  Moreover, in the screw-type conveying device disclosed in Patent Document 1, a buffer portion having an interval of 150 mm or more and less than 250 mm is provided at the connecting portion between the horizontal conveying screw and the vertical conveying screw to elastically compress the object to be conveyed. It is essential to provide

JP 2017-119550 A

  However, in the screw-type conveyance device disclosed in Patent Document 1, the retention is caused by the shape and compression state of the object to be conveyed in the buffer portion having a predetermined space formed between the horizontal conveyance screw and the vertical conveyance screw. There is a problem that it is difficult to convey such as clogging.

  Then, it aims at provision of the screw type conveying apparatus which can convey more smoothly and reliably.

The screw-type conveying device of the present invention is
A vertical conveyor provided with an axial screw for vertical conveyance disposed in the trough so that the rotation axis extends in the vertical direction;
A horizontal conveyor having a non-axial screw for horizontal conveyance disposed in the trough so that the rotation axis extends in the horizontal direction;
A screw type conveying device that supplies a conveyed object conveyed by the horizontal conveyor to a lower part of the vertical conveyor and conveys the conveyed object toward a high place,
The connecting portion between the vertical conveyor and the horizontal conveyor has the shortest distance between the trajectory line of the tip of the horizontal conveying axisless screw and the trajectory line of the outer diameter (r1) of the vertical conveying axisless screw. The distance (d) of the portion is a length of 0.25% to 40% of the outer diameter (r2) of the transverse conveying non-axial screw and is less than 150 mm.

  The distance (d) is preferably 5 mm or more. If it is less than 5 mm, there is a concern about contact between screws, and if it is 150 mm or more, it is difficult to smoothly transfer a conveyed product (for example, metal chips) from a horizontal conveyor to a vertical conveyor.

  The angle (α) formed by the rotation axis of the longitudinal conveying axisless screw and the rotation axis of the lateral conveying axisless screw may be in the range of 40 ° to 140 °.

  When the angle (α) is perpendicular (for example, vertical) to the ground contact surface, the distance (d) is 15% to 40% of the outer diameter (r2) of the transverse screw. Preferably, 20 to 35% is more preferable.

  When the angle (α) is 80 ° to 100 °, 65 ° to 115 °, and 40 ° to 140 °, the distance (d) is 10 of the outer diameter (r2) of the non-axial screw for lateral conveyance. % To 35%, 8% to 30%, 0.25% to 25% are exemplified.

  The distance (d) is preferably 10 to 100 mm, more preferably 20 to 80 mm, and still more preferably 20 to 60 mm.

  Moreover, it is preferable that the said distance (d) is 15 to 40% of the outer diameter (r2) of the non-axial screw for horizontal conveyance, and 20 to 35% is more preferable.

  In the screw-type conveying device of the present invention, both the vertical conveying axial screw and the lateral conveying axial screw have a pitch (p1, p2) of the axial screw and the outer diameter (r1, r2) of the axial screw. It is the same or larger than the outer diameter (r1, r2) of the non-axial screw. It is more preferable that the pitch (p1, p2) of the non-axial screw is larger than the outer diameter (r1, r2) of the non-axial screw.

  The pitch (p1, p2) of the non-axial screw is preferably up to 2.5 times the outer diameter (r1, r2) of the non-axial screw, and more preferably up to 2.0 times.

  By making the pitch (p1, p2) of the non-axial screw the same as the outer diameter (r1, r2) of the non-axial screw or larger than the outer diameter (r1, r2) of the non-axial screw, It is possible to smoothly transport an object to be transported that is hard and easily elastically compressed.

  Moreover, it is preferable that the pitch of the longitudinally-carrying non-axial screw becomes larger toward the conveying direction. In this case, the pitch may be increased in units of pitch, or the pitch may be gradually increased at each of a plurality of locations divided along the transport direction. For example, it is divided into three along the conveying direction, and the pitch of the screw at the loading position (first divided area) of the conveyed object is selected from a range of 1.0 to 1.2 times the outer diameter, and the intermediate position (second The pitch of the screw in the division area is selected from a range of 1.2 to 1.7 times the outer diameter, and the screw pitch in the discharge position (third division area) is 1.7 to 2.2 times the outer diameter. You may select from a range.

  In the case of an axial screw for vertical conveyance, gravity is applied to the object to be conveyed, so that a clogging phenomenon is likely to occur compared to horizontal conveyance. Therefore, clogging may be suppressed by increasing the pitch in proportion to the height position (vertical conveyance distance).

  Moreover, the pitch of the non-axial screw for horizontal conveyance may become large as it goes to a conveyance direction. In this case, the pitch may be increased in units of pitch, or the pitch may be increased at each of a plurality of locations divided along the transport direction. For example, it is divided into three along the transport direction, and the pitch of the screw at the first loading position (first split area) of the transport object is selected from a range of 1.0 to 1.2 times the outer diameter, and the transport object The screw pitch at the second input position (second divided area) is selected from a range of 1.2 to 1.7 times the outer diameter, and the screw at the third input position (third divided area) of the object to be conveyed is selected. The pitch may be selected from a range of 1.7 to 2.2 times the outer diameter.

  In the case of a configuration in which the object to be conveyed is thrown in at a plurality of locations, the amount of conveyance of the object to be conveyed gradually increases toward the downstream in the conveying direction, and the clogging phenomenon is likely to occur. Therefore, clogging may be suppressed by increasing the pitch in proportion to the lateral conveyance distance (conveyance amount).

  The screw type conveying device of another invention has a non-axial screw in which the pitch of the screw is larger than the outer diameter of the screw.

  The screw type conveying apparatus of another invention has an axis screw which is a pitch of a screw which is large continuously or stepwise toward the conveying direction. In this case, the pitch may be increased continuously in units of pitch, or the pitch may be increased stepwise for each of a plurality of locations divided along the transport direction.

  The screw-type conveying device (or vertical conveyor or horizontal conveyor) has a trough that houses a non-axial screw. The trough is exemplified by a U-shaped trough and a cylindrical trough. You may have the trough cover which covers other than the location which throws in a to-be-conveyed object in the location which the upper part of a U-shaped trough is opening.

  Although the to-be-conveyed object of this invention is not restrict | limited in particular, For example, it is suitable for conveyance of a metal chip. Examples of the metal chips include chips such as a ribbon shape, a spiral shape, a spiral shape, and a chopped shape, and crushed chips.

  According to the present invention, the object to be conveyed, particularly the object to be conveyed such as swarf discharged from a machine tool or the like, is arranged inside the vertical conveying conveyor, inside the horizontal conveying conveyor, and between the vertical conveying conveyor and the horizontal conveying conveyor. It is possible to provide a screw type conveying device that can convey more smoothly and reliably without causing clogging or staying in the connecting portion.

It is sectional drawing of the screw-type conveying apparatus which concerns on one Embodiment of this invention. It is a top view of a screw type conveyance device concerning one embodiment of the present invention. It is an enlarged view of the conveyor connection part which concerns on one Embodiment of this invention. It is a front view of the vertical conveyor which concerns on one Embodiment of this invention. It is a front view of the horizontal type conveyor concerning one embodiment of the present invention.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a screw-type conveying device according to an embodiment of the present invention. A screw type conveying apparatus 1 shown in FIG. 1 is an apparatus that conveys an object to be conveyed such as metal chips and press waste discharged from a machine tool, and includes a vertical conveyor 10 and a horizontal conveyor 20.

  The vertical conveyor 10 includes a vertical conveying axial screw 12 inside a cylindrical trough 11, and is arranged so that the vertical conveying axial screw rotational axis 14 extends in the vertical direction. In the present embodiment, the vertical direction is a direction based on the vertical direction rather than the horizontal direction.

  The longitudinal conveying non-axial screw 12 is connected to a vertical conveying axial-free screw driving unit 13 extending along the rotation axis 14 thereof. Further, the direction of the vertical conveying axisless screw rotation axis 14 may be a direction slightly inclined with respect to the apparatus installation surface from the vertical direction as in the present embodiment. In FIG. 1, although it is inclined by 40 °, it is not particularly limited thereto.

  FIG. 4 is a front view of a vertical conveyor according to an embodiment of the present invention. The rotation axis 14 of the vertical conveying non-axial screw 12 shown in FIG. 4 coincides with the center line of the cylindrical trough 11, and the vertical peripheral axis of the cylindrical trough 11 and the vertical conveying non-axial screw 12 are used. It is preferable that a slight gap 15 (for example, 0.1 mm to 50 mm) is formed over the entire circumference between the outer diameter locus line 16 of the non-axial screw, but the gap 15 depends on the object to be conveyed. It is more preferable that the specific numerical value is 0.1 mm to 20 mm.

  The horizontal conveyor 20 has a U-shaped trough 21 whose upper part is open for feeding a material to be conveyed, and a horizontal conveying non-axial screw rotation axis 24 is arranged so as to extend in the horizontal direction. A non-axial screw 22 is provided. In the present embodiment, the horizontal direction is a direction based on the horizontal direction rather than the vertical direction.

  FIG. 5 is a front view of a vertical conveyor according to an embodiment of the present invention. The transverse conveying non-axial screw 22 shown in FIG. 5 is connected to a lateral conveying non-axial screw driving section 23 extending along the rotation axis 24 thereof. Further, the direction of the horizontal conveying axisless screw rotation axis 24 may be a direction slightly inclined from the horizontal direction as in the present embodiment. In FIG. 1, although it is inclined 15 °, it is not particularly limited thereto.

  The rotation axis 24 of the transverse conveying non-axial screw 22 coincides with the center line of the lower half circumference on the arc of the U-shaped trough 21, and the inner surface of the lower half circumference of the arc portion of the U-shaped trough 21 and the horizontal conveying It is preferable that a slight gap (for example, 0.1 mm to 50 mm) is formed between the outer diameter locus line 26 of the non-axial screw for lateral conveyance of the axial screw 22 over the lower half circumference of the arc portion. The gap 25 is adjusted according to the object to be conveyed, and the specific numerical value is more preferably 0.1 mm to 20 mm.

  The pitches of the longitudinal conveying no-axis screw 12 and the lateral conveying no-axis screw 22 shown in FIGS. 4 and 5 are formed to be equal to or larger than the respective outer diameters. Specifically, the pitch is preferably 15% to 40% of the outer diameter (r2) of the laterally conveying non-axial screw, and more preferably 20 to 35%.

  The distance (d) when the angle (α) formed by the rotation axis 14 of the vertical conveyance axisless screw 12 and the rotation axis 24 of the horizontal conveyance axisless screw 22 is perpendicular (for example, vertical) to the ground plane. Is preferably 15% to 40% of the outer diameter (r2) of the non-axial screw for transverse conveyance, and more preferably 20 to 35%.

  When the angle (α) is 80 ° to 100 °, 65 ° to 115 °, 40 ° to 140 °, the distance (d) is 10% of the outer diameter (r2) of the non-axial screw for lateral conveyance. -35%, 8% -30%, 0.25% -25% are illustrated.

  The pitch (p1, p2) of the non-axial screw is preferably 2.5 times the outer diameter (r1, r2) of the non-axial screw, and more preferably 2.0 times.

  The vertical conveyor 10 and the horizontal conveyor 20 are used for horizontal conveyance from the trajectory line 27 of the distal end portion of the lateral conveyance non-axial screw 22 opposite to the lateral conveyance non-axial screw driving section 23 and the trajectory line of the distal end portion. The line extending along the rotation axis 24 of the non-axial screw 22 and the outer diameter locus line 16 of the vertical conveying non-axial screw of the outer diameter (r1) of the vertical conveying non-axial screw 12 of the vertical conveyor 10 are the shortest. The distance (d) of the portion to be connected is 20% to 35% of the outer diameter (r2) of the transverse conveying non-axial screw 22. The specific numerical value of the distance (d) is preferably 40 mm or more.

(Embodiment 2)
Although the pitch of the vertical conveyance axisless screw 12 in FIG. 1 is constant, the vertical conveyance axisless screw 12 is virtually divided into three along the conveyance direction, and the input position of the object to be conveyed (first division area) The screw pitch is selected from the range of 1.0 to 1.2 times the outer diameter, and the screw pitch at the middle position (second divided area) is selected from the range of 1.2 to 1.7 times the outer diameter. The screw pitch at the discharge position (third divided area) may be selected from a range of 1.7 to 2.2 times the outer diameter.

  Although the pitch of the horizontal conveying axisless screw 22 in FIG. 1 is constant, the horizontal conveying axisless screw 22 is virtually divided into two along the conveying direction, and the first input position (first The screw pitch in the division area is selected from a range of 1.0 to 1.2 times the outer diameter, and the screw pitch in the second input position (second division area) of the conveyed object is 1.2 in the outer diameter. You may select from the range of -1.7 times.

(Another embodiment)
The vertical conveyor 10 and the horizontal conveyor 20 may be inclined in the aforementioned ranges from the vertical direction and the horizontal direction, respectively. Although the angle (α) formed by the rotation axis 14 of the vertical conveyance axisless screw 12 and the rotation axis 24 of the horizontal conveyance axisless screw 22 can be configured from 1 ° to 179 °, it can be 40 ° to 140 °. It is preferable to configure in the range of °. In FIG. 1, it is 130 degrees.

(Screw material)
Examples of steel materials used as raw materials for non-axial screws and / or cylindrical troughs, U-shaped troughs and trough covers include, for example, general structural rolled steel (SS330, SS400, SS490, SS540, etc.), cold rolled steel plates (SPCC, SPCD, SPCE, SPCF, SPCG, etc.), carbon steel (S25C, S30C, S35C, S45C, S50C, S55C, etc.), hot or cold rolled stainless steel plates (SUS304, SUS316, SUS430, SUS410, etc.), wear resistant steel plates (Hardox (HARDOX (registered trademark)) of Sweden Steel, Everhard (EVERHARD (registered trademark)) of JFE Steel, etc., high strength steel plates (SM570, SMA570W, etc.), TMCP type high strength steel plates (SM570TMC, SMA570W) MC, etc.) and the like.

  The steel material used as the raw material for the non-axial screw and / or the cylindrical trough, the U-shaped trough and the trough cover is preferably a steel material having a higher strength (high tensile strength) than the general structural rolled steel material (SS400). It is preferable from the viewpoint of wear resistance and durability. In the case of SS400, the total length of the non-axial screw shrinks by about 10% to 15% compared to the initial value after long-term use (for example, 6 months, 7 hours / day), but it has higher strength (high tensile strength) than SS400. Stainless steel plates, wear-resistant steel plates (HARDOX (registered trademark) of Sweden Steel), Everhard (EVERHARD (registered trademark)) of JFE Steel, etc., have a very small degree of shrinkage.

(Description of operation)
Next, as shown in FIGS. 1 and 2, the object to be conveyed is sent from each of the screw screw conveyors 40 and 41 to the horizontal conveyance conveyor 20. The objects to be conveyed are sent out by the axial screw conveyors 40 and 41, and the objects to be conveyed are fed into the horizontal conveyor 20, and are fed to the lower part of the vertical conveyor 10 while being entangled with each other during the conveyance by the horizontal conveyor 20. . Subsequently, it conveys toward a high place by the vertical conveyor 10, and is discharged | emitted from the discharge port 31 of the hood member 30 provided in the upper part.

  The conveyance amount of the vertical conveyance axisless screw 12 is preferably larger than the conveyance amount of the horizontal conveyance axisless screw 22, and the vertical conveyance axisless screw 12 and the horizontal conveyance axisless screw 22 have the same shape and the same size. In the case of a non-axial screw, it is preferable to set the rotational speed of the vertical conveying non-axial screw 12 higher than the rotational speed of the lateral conveying non-axial screw 22. By controlling the drive of the vertical transfer axisless screw 12 and the horizontal transfer axisless screw 22 in this way, the unloaded material at the connecting portion between the vertical conveyor 10 and the horizontal conveyor 20 is prevented from being clogged or staying. Can do.

  In addition, the rotation direction of the vertical conveyance axisless screw 12 is set to be opposite to the rotation direction of the horizontal conveyance axisless screw 22, so that the horizontal conveyance axisless screw 22 changes to the vertical conveyance axisless screw 12. The delivery of the transported object is prepared. In other words, when the rotation direction of the vertical conveyance axisless screw 12 is set to be counterclockwise when viewed in the conveyance direction, the rotation direction of the horizontal conveyance axisless screw 22 is set to be clockwise when viewed in the conveyance direction. It is preferable.

  The outer diameters (r1, r2) of the longitudinal conveying non-axial screw 12 and the lateral conveying non-axial screw 22 may be different from each other. Also, the pitches (p1, p2) of the vertical conveying axisless screw 12 and the lateral conveying axisless screw 22 may be different sizes as long as the relationship with the outer diameter is satisfied.

  The vertical conveyor 10 and the horizontal conveyor 20 can be configured with a screw to convey a small amount of metal chips, but in order to convey a large amount of metal chips, particularly in the vertical direction, The non-axial screw is superior, and by configuring the vertical bearer 10 and the horizontal conveyor 20 with non-axial screws, the object to be conveyed can be smoothly and reliably conveyed.

(Experimental example)
The metal chips discharged from the milling machine were transported by the two-axis axial screw conveyors 40, 41, and charged into the laterally transporting axial screw 22.
Axial screw outer diameter (r1, r2): 177mm
Axial screw pitch for horizontal transfer: 177 mm (1.0 times the outer diameter), 194 mm (1.1 times the outer diameter)
The pitch of the axial screw for vertical conveyance: Three different pitches: a feed position of 177 mm, an intermediate position of 265 mm (1.5 times the outer diameter), and a discharge position of 354 mm (2.0 times the outer diameter).
Angle (α): 90 °, 110 °, 130 °
Distance (d): Three types of 20 mm, 40 mm, and 60 mm.
In the horizontal transfer axisless screw 22, chips could be transferred in the horizontal direction without clogging, blade breakage, abnormal noise, etc., and fed to the vertical transfer axisless screw 12.
In the vertical transfer axisless screw 12, the chips could be transferred upward without clogging, breakage of blades, abnormal noise, or the like.
In addition, when the pitch (p1, p2) is the same as the outer diameter (r1, r2) or the outer diameter (r1, r2) is larger than the case where the outer diameter (r1, r2) is smaller than the outer diameter (r1, r2). There was a tendency for clogging and abnormal noises to occur less easily.
Further, when the distance (d) was 5 mm or less, the conveyed object was not smoothly fed into the vertical conveyor 20.
Further, when the distance (d) was 150 mm or more, the conveyed object was not smoothly fed into the vertical conveyor 20.

When the pitch of the vertical conveying axisless screw was set to one type and was the same as the outer diameter of the screw, clogging occurred during operation for 8 hours a day.
When the pitch of the axial screw for vertical conveyance is 1.1 times, 1.2 times, 1.5 times, 1.6 times, 1.8 times, 2 times the outer diameter of the screw, the magnification is large. It was a tendency not to clog.
When the pitch of the non-axial screw for horizontal conveyance is 1.1 times, 1.2 times, 1.5 times, 1.6 times, 1.8 times and 2 times the outer diameter of the screw, the magnification is large. Although it was less likely to be clogged, it could be transported without problems if it was a small amount of the object to be transported.
When the outer diameter of the non-axial screw was set to 227 mm and the relationship between the outer diameter and the pitch, the angle (α), and the distance (d) were performed under the same conditions as described above, it could be conveyed without any problems.

DESCRIPTION OF SYMBOLS 1 Screw type conveying apparatus 10 Vertical conveyor 11 Cylindrical trough 12 Axis screw for vertical conveyance 13 Axis screw drive part for vertical conveyance 14 Axis screw rotation axis for vertical conveyance 15 Cylindrical trough and non-axial screw for vertical conveyance Clearance with outer diameter 16 Trajectory line of outer diameter of vertical conveying non-axial screw 20 Horizontal conveyor 21 U-shaped trough 22 Non-axial screw for horizontal conveying 23 Non-axial screw drive unit for horizontal conveying 24 Rotating non-axial screw for horizontal conveying Axis line 25 Clearance between U-shaped trough and outer diameter of transverse conveying non-axial screw 26 Outer diameter locus line of transverse conveying non-axial screw 27 Trajectory line of distal end of transverse conveying non-axial screw 30 Hood member 31 Discharge port 40 Axis Screw Conveyor 41 Axis Screw Conveyor d Outer Diameter Trace of Axis Screw for Longitudinal Conveyance and Tip of Axis Screw for Horizontal Conveyance The shortest distance of the trajectory line p1 The pitch of the axisless screw for vertical transfer p2 The pitch of the axisless screw for horizontal transfer r1 The outer diameter of the axisless screw for vertical transfer r2 The outer diameter of the axisless screw for horizontal transfer α The axisless screw for vertical transfer Between the rotation axis of the shaft and the rotation axis of the horizontal screw

Claims (4)

A vertical conveyor provided with an axial screw for vertical conveyance disposed in the trough so that the rotation axis extends in the vertical direction;
A horizontal conveyor having a non-axial screw for horizontal conveyance disposed in the trough so that the rotation axis extends in the horizontal direction;
A screw type conveying device that supplies a conveyed object conveyed by the horizontal conveyor to a lower part of the vertical conveyor and conveys the conveyed object toward a high place,
The connecting portion between the vertical conveyor and the horizontal conveyor has the shortest distance between the trajectory line of the tip of the horizontal conveying axisless screw and the trajectory line of the outer diameter (r1) of the vertical conveying axisless screw. The screw-type conveying device in which the distance (d) of the portion is 0.25% to 40% of the outer diameter (r2) of the lateral conveying screw and less than 150 mm.   As for the said axis | shaft non-screw for vertical conveyance and the axis-less screw for horizontal conveyance, the pitch (p1, p2) of the said axis-less screw is the same as the outer diameter (r1, r2) of the said axis-less screw, or the said axis The screw-type conveying device according to claim 1, wherein the screw-type conveying device is larger than the outer diameter (r1, r2) of the screw.   A screw-type conveying device having a non-axial screw having a screw pitch larger than the outer diameter of the screw. A screw-type conveying device having a non-axial screw that increases continuously or stepwise as the pitch of the screw goes in the conveying direction.

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