JP4831567B2 - Screw parts and screw conveyor - Google Patents

Description

  The present invention relates to the division of a screw of a screw conveyor that separates machining fluid discharged from a machine tool, such as cutting, grinding, and polishing, from machining waste.

  Conventionally, a screw conveyor has been used to separate and collect machining fluid and machining waste discharged from a machine tool. For example, as in Patent Document 1, the screw part is arranged almost horizontally, the processing waste is transferred while separating the processing liquid, and the processing waste is pushed by a screw into a discharge pipe that rises obliquely upward at the tip of the screw conveyor. Separation is promoted by extending the liquid discharge and separation time. Furthermore, resistance is given by raising the discharge pipe obliquely, and the cutting waste is compressed with a screw to promote the separation of the cutting oil. In such screw conveyors, the wear of the screw, cylinder, or U-shaped conveyor body (tube) is severe. Thus, for example, Patent Document 2 discloses an example in which the screw is made of a high-speed steel wire or carbon steel wire, or is subjected to nitriding treatment or a super hard coating. Similarly, an example in which a conveyor main body is provided with steel such as stainless steel and high-speed steel or a curved inner tray is disclosed.

On the other hand, in Patent Document 3, the screw is divided into several parts to increase the service life of the screw of the screw conveyor, the hexagonal cross-section convex part and concave part are fitted to each other, and a bolt nut is used in the direction perpendicular to the axis. An example is disclosed in which a long screw is obtained by fastening and assembling and disassembling, and the worn part is replaced with a part with less wear. Further, in Patent Document 4, a screw is provided by providing a connecting convex portion having a non-circular cross-sectional shape on one end face of the screw and a connecting concave portion capable of fitting the non-circular connecting convex portion on the other end face. A unit (part) is formed, and a plurality of screw units are provided on the other side using a spring ring that expands in the radial direction through the fitting of the connecting convex portion and the connecting concave portion of each core shaft. A screw having a predetermined length is obtained by fitting and fixing a screw unit and a screw shaft by fitting in an annular groove. In addition, the cross-sectional shape of a convex part and a recessed part is open | released in addition to a hexagonal shape and a rectangular cross section. Moreover, what is fixing with the flange instead of the fitting by a convex part and a recessed part is disclosed.
JP-A-2-56314 JP 2002-154030 A JP-A-57-93812 Japanese Patent Laid-Open No. 2003-246431

  In a screw conveyor that compresses machine tool scraps etc. with a screw and separates them into scraps and working fluid, the tip of the screw wears very hard and must be disassembled and assembled fairly frequently. There was a problem. It is particularly severe in the case of scraps of castings and ferrous materials. Therefore, we want to be able to separate the screw so that only the tip of the worn screw is replaced.

  However, in the method using a spring ring as in Patent Document 4, when disassembling, the screws must be pulled together, which requires a jig, is difficult to disassemble, and takes time to replace. . On the other hand, with bolts and nuts that are perpendicular to the axis or fixed with flanges, the bolts and nuts are also severely worn due to the passage of machining waste, etc. There was a problem that could not be.

  In view of such problems, an object of the present invention is to provide a screw component and a screw conveyor that can be easily disassembled and assembled even if the tip and the periphery of the screw conveyor are heavily worn.

  In this invention, it is a screw component which has a screw blade | wing and the screw shaft which the said screw blade | wing is provided in the outer periphery, and has a hollow hole, Comprising: The axial center of the said screw shaft passes through the end surface of the one end side of the said hollow hole. Provided at an end surface member having a non-circular convex or concave section, a through hole passing through the axial center of the screw shaft of the end surface member in the axial direction, and an edge of the through hole opposite to the groove A screw part having a bolt seat surface formed, a sealing member that seals the other end of the hollow hole, and a taper screw hole that is formed in the sealing member and is smaller than the hollow hole and larger than the through hole. By providing, the above-mentioned problems were solved.

  That is, by providing an end face member having a convex portion or a concave portion having a non-circular cross-sectional shape, a force in the rotational direction can be firmly received. In addition, a hexagon socket head bolt can be inserted into the screw shaft through a tapered screw hole that is smaller than the hollow hole and is larger than the through hole. The through hole has a bolt seat surface provided at the edge of the through hole. The bolt can be inserted and screwed to the other side. Further, the hexagon socket head cap screw can be reliably rotated through the taper screw hole with a tool such as a hexagon stick spanner.

Such screw parts are preferably set with a hexagon socket head cap screw and a tapered hole. Therefore, in the invention according to claim 2, the hexagon socket head cap screw that can pass through the taper screw hole and a hexagon socket head taper plug that closes the taper screw hole are provided. Provided is a screw component in which a screw side surface of a head can be brought into contact with the bolt seat surface, and a screw portion of the hexagon socket head cap screw can protrude from the end surface member. Further, since the hollow hole is closed by the hexagon socket taper plug, there is no intrusion of grinding waste or the like into the hollow hole into which the hexagon socket bolt is inserted from the outside. In addition, since machining scraps are less likely to accumulate and move in the hexagonal hole portion of the hexagon socket taper plug, wear due to hexagonal hole grinding scraps is small.

  Such a screw part can be assembled into a screw conveyor by fitting it into the concave or convex portion of the mating screw and attaching it to the female screw of the mating screw using a hexagon socket bolt. Therefore, in the invention described in claim 3, a cylindrical main body having a top opening that is disposed substantially horizontally so that the tip has an inclination of 0 to 5 ° and protrudes upward and extends in the longitudinal direction; A screw conveyor that is rotatable about the longitudinal direction and has a screw blade on the shaft, and a drive source that rotates the screw, the screw being on the drive source side And the tip side is the screw component according to claim 2, and the drive source side is configured such that the screw blade is in phase with the screw blade of the screw component, and is driven A drive-side concave portion that fits into the convex portion of the screw component or a drive-side convex portion that fits into the concave portion and a female that passes through the axis of the screw shaft are disposed on the distal end surface of the source-side screw. Flip and, is provided with, by screwed the hexagon socket head bolts to the female screw, and the drive source-side screw, the said screw part to the screw conveyor being integrated. Needless to say, it is preferable that the divided screw blades have the same phase and the same shape, and that the step difference between the screw blades is as small as possible.

  Thus, the screw tip can be easily assembled and disassembled. Therefore, the invention according to claim 4 is suitable for a screw conveyor provided with a bending guide portion connected to the tip of the main body and a discharge pipe that rises obliquely upward following the bending guide portion.

  In the present invention, a force in the rotational direction is firmly received by an end face member having a non-circular convex section or a concave section at one end of a screw shaft provided with a screw blade, and a hexagonal hole is provided through a tapered screw hole at the other end. Bolts can be inserted into the screw shaft, inserted through the through hole, screwed to the mating side, and the hexagon socket head bolt can be reliably rotated through the taper screw hole, making disassembly and assembly easy. Screw parts can be provided.

  In the second aspect of the present invention, since the bolt is a hexagon socket head bolt, it is easy to fix the bolt to the mating member, and it is easy to disassemble and reassemble the bolt. In addition, since the taper screw hole is closed with a hexagon socket taper plug, there is no intrusion of grinding dust into the hollow hole, and wear due to grinding dust etc. of the hexagon socket of the plug is small. Therefore, even if the blade blades and the like are severely worn, the screw parts can be easily assembled and disassembled.

  The screw of the screw conveyor is divided into two parts, the drive source side and the tip side, the tip side is a screw part, and the drive source side is aligned with the screw blade without any step, and the screw part is fitted to the tip part of the drive source side screw. A drive-side concave or convex part and a female screw that passes through the shaft center are provided, and a hexagon socket head bolt is screwed into this female screw so that the drive-source side screw and the screw component are integrated, so that a strong compression resistance is applied to the screw. Since the tip can be easily replaced even if severe wear occurs, a screw conveyor having a long service life and easy maintenance work is provided.

  In addition, in the invention according to claim 4, a bending guide portion connected to the tip of the main body and a discharge pipe that rises obliquely upward following the bending guide portion. Therefore, it is possible to reliably separate the processing waste and the processing liquid and provide an environmentally friendly separation device.

  The best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional view of a screw conveyor showing an example of an embodiment of the present invention, and FIG. 2 is a partial cross-section of a screw integrating a drive source side screw and a screw component showing an example of an embodiment of the present invention. FIG. 3A is a side view of a screw part showing an example of an embodiment of the present invention, FIG. 4B is a left side view, and FIG. 4A is an example of an embodiment of the present invention. The side view of a drive source side screw, (b) is a right view. As shown in FIG. 1, the screw conveyor 1 includes a cylindrical main body 3 having an upper opening 2 that is disposed substantially horizontally so that the tip has an inclination of 0 to 5 °, protrudes upward, and extends in the longitudinal direction. It has a screw 6 that can be rotated about the longitudinal direction as an axis and is provided with screw blades 5 on the axis, and a drive source 7 that rotates the screw. Furthermore, the bending guide part 8 connected to the front-end | tip 3a of the main body 3 and the discharge pipe 9 which stands | starts up diagonally upward following the bending guide part are provided.

  The screw 6 is rotatably supported by a bearing 10 provided on the drive source 7 side, and a chain sprocket 11 is further attached. In the drive source 7, the output of the electric motor 12 is reduced in rotational speed by the speed reducer 13 and is transmitted to the chain sprocket 14, the chain 15, and the chain sprocket 11 of the speed reducer to drive the screw 6. The screw 6 is rotated inside the main body by a drive source 7, and the machining fluid processing waste and the like charged into the main body is sent to the opposite side of the drive source 7, that is, toward the discharge pipe 9 (to the right in the drawing). To do. A large number of micro holes (not shown) are formed in the bottom 3 b of the main body 3 so that the machining liquid is dropped onto the oil pan 16. The oil pan is located below the screw conveyor main body 3 and the drive source 7, and supports the main body and the like by a support portion (not shown) and receives dust, processing liquid, and the like.

  Processing fluid and processing waste are introduced from the upper opening 2 of the screw conveyor 1. The screw 6 is rotated continuously or intermittently to move the machining liquid and machining waste to the left. The machining liquid separated from the machining waste is discharged from the minute hole in the bottom 3b of the main body 3, stored in the oil pan 16, and partially or entirely recovered and filtered by a discharge pump or the like, and used again as a coolant for processing. . As the processing waste and the processing liquid progress toward the discharge pipe, the separation progresses, but the processing waste contains the processing liquid. Further, the processing waste is sent out by the screw and sent to the bending guide portion 8 and the discharge pipe 9. The screw tip 6a extends to the vicinity of the entrance of the bending guide portion, and further grinding waste is not sent directly by the screw, but is sent in a form in which the screw is subsequently pushed by the grinding waste to be sent later.

  On the other hand, since the discharge pipe 9 has an opening 9a on the upper side, gravity is applied to the grinding waste, and the grinding waste in the discharge pipe is divided into grinding waste pushed out from the screw 6 and grinding waste returning from the outlet. Compressed with a strong force, the contained processing liquid is separated, returns to the main body 3 side, and is collected from the minute holes in the main body bottom 3b. Thereby, the content of the machining fluid of the machining waste finally discharged from the opening 9a becomes very small, and post-processing becomes easy.

However, at the screw tip portion 6a, since the processing waste is compressed , wear in the screw tip portion 3a and the vicinity thereof is severe. Therefore, in the present invention, in particular, the tip end portion and the vicinity of the screw 6 are bisected so as to be exchangeable. As shown in FIGS. 1 and 2, the screw 6 is divided into a screw part 21 on the tip side and a drive source side screw 41 on the drive source side.

  As shown in FIGS. 2 and 3, the screw component 21 includes a screw blade 26 and a screw shaft 26 having a hollow hole 22 provided on the outer periphery thereof. An end face member 23 is provided on one end side 22 a of the hollow hole 22. The end surface member 23 has a cylindrical shape having a flange portion 23a at the tip, and the outer shape portion 23b is fitted into the hollow hole 22, and the end surface member is fixed to the screw shaft 26 by welding between the flange portion and the hollow hole end portion 22a. is doing. A cross-shaped concave groove 24 having a non-circular cross-sectional shape passing through the axis of the screw shaft 26 is provided on the end surface 23c of the end surface member 23. The groove 24 extends to the outer periphery of the collar portion. Furthermore, a through hole 25 is provided in the center of the end face member 23 so as to penetrate the axial center of the screw shaft in the axial direction. A bolt seat surface 27 is formed at the edge of the through hole on the opposite side of the recess 24 of the end surface member 23.

  A sealing member 28 is provided on the other end side of the hollow hole 22. The sealing member 28 has a cylindrical shape having a flange portion 28a at the tip, and the outer shape portion 28b is fitted into the hollow hole 22, the gap between the flange portion and the other end portion 22b of the hollow hole is welded, and the sealing member is connected to the screw shaft 26. It is fixed to. The sealing member 28 is provided with a tapered screw hole 29 that is smaller than the hollow hole 22 and larger than the through hole 25. More specifically, the rod-shaped main body portion 30b provided with the screw 30a of the hexagon socket head cap screw 30 is allowed to pass through the through hole 25, the screw protrudes from the end surface 23c of the end surface member 23, and the screw side surface 30d of the head portion 30c is the bolt. The hexagon socket head cap screw can be brought into contact with the seating surface 27 and can be passed through the taper screw hole 29. The taper screw hole 29 can be closed by a hexagon socket taper plug 31.

  On the other hand, as shown in FIGS. 2 and 4, the drive source side screw 41 has a screw blade 5 and a screw shaft 46 having a hollow hole 42 provided on the outer periphery thereof. A drive member 43 is provided on one end side 42 a of the hollow hole 42. The drive member 43 has a substantially stepped cylindrical shape having a large-diameter portion 43a in the middle, and, like the end face member 23 and the sealing member 28, the outer shape portion is inserted into the hollow hole, and the large-diameter portion and the screw blade end portion. The space between the ends of the hollow holes is welded, and the drive member is fixed to the screw shaft 46. A bearing 10 is attached to the large-diameter portion 43a of the drive member 43, and a key groove 12 for fixing the chain sprocket 11 is provided at the tip thereof.

  A connecting member 48 is provided on the other end side of the hollow hole 42. The connecting member 48 has a cylindrical shape having a flange portion 48a on the distal end side. The outer shape portion 48b is fitted into the hollow hole 42, the gap portion is welded between the other end portion 42b of the hollow hole, and the connecting member is connected to the screw shaft. 46 is fixed. On the end face 43c of the connecting member 43, there is provided a drive-side convex portion 44 that is a cross-shaped convex having a non-circular cross-sectional shape passing through the axis of the screw shaft 46. The convex portion 44 extends to the outer periphery of the collar portion. Furthermore, an internal thread 45 passing through the axis of the screw shaft is provided at the center of the connecting member 43.

  The concave portion 24 of the end face member 23 of the screw component 21 and the driving side convex portion 44 of the connecting member 48 of the driving source side screw 41 are fitted. At this time, the screw blades are provided so that the phases of the screw blades 5 and 5 coincide. Then, as shown in FIGS. 2 and 3, the hexagon socket head cap screw 30 is inserted from the taper screw hole 29 of the screw part 21, and the rod-shaped main body 30 b is screwed to the female screw 45 of the drive side screw 41 through the through hole 25. At this time, a hexagon socket wrench may be inserted into the hexagon socket 32 in order to rotate the hexagon socket bolt. Further, the tip of the hexagon stick spanner is inserted from the taper screw hole 29. The screw side surface 30d of the hexagon socket head bolt 30c is abutted and fixed to the bolt seat surface 27. After the fixing is completed, a hexagon socket taper plug 31 is screwed into the taper screw hole 29 to seal the hollow hole 22. Thereby, the screw 6 is assembled.

  When replacing the screw parts, the reverse is the case as described above, but the taper plug 31 used for sealing is less likely to loosen, and the processing waste is collected but the relative movement with the processing waste is small, and the hexagonal hole 33 Because there is little damage, it can be removed easily. Further, since the end face where the hollow hole 22, the convex portion 44, and the concave portion 24 are fitted does not allow any machining waste to enter, there is no damage to the hexagon socket head bolt, and maintenance is easy. The convex portion 44 may be on either the drive side screw 41 side or the screw component 21 side. However, since the convex portion side is easier to remove dust and repair, it is less damaged and has a longer service life. It is preferable to use it. In the present embodiment, the cross-sectional shape is a cross, but it may be a square, a hexagon, or the like. Moreover, although the groove | channel was extended to the collar, it cannot be overemphasized that a hollow shape of a hexagon or a square may be sufficient.

It is a fragmentary sectional view of the screw conveyor which shows the example of embodiment of this invention. It is a fragmentary sectional side view of the screw which integrated the drive source side screw and screw component which show the example of embodiment of this invention. (A) is a side view of a screw part showing an example of an embodiment of the present invention, and (b) is a left side view. (A) is a side view of the drive source side screw which shows the example of embodiment of this invention, (b) is a right view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screw conveyor 2 Upper opening part 3 Main body 5 Screw blade 6 Screw (shaft)
6a outer periphery 7 drive source 8 bending guide portion 9 discharge pipe 21 screw part 22 hollow hole 22a end surface 22b on one end side of the hollow hole 23b other end side of the hollow hole 23 end surface member 24 convex portion or concave portion 25 through hole 25a through hole edge portion 27 Bolt bearing surface 28 Sealing member 29 Tapered screw hole 30 Hexagon socket head cap screw 30b Bolt screw portion 30c Hexagon socket head bolt 30d Screw side surface 31 Hexagon socket head taper plug 41 Drive source side screw 41a Tip surface 44 Drive side recess or Drive-side convex part 45 Female thread

Claims (4)

A screw part having a screw blade and a screw shaft provided on the outer periphery and having a hollow hole, wherein a cross-sectional shape passing through the axial center of the screw shaft is non-circular at an end surface on one end side of the hollow hole An end face member provided with a convex part or a concave part, a through hole penetrating the axial center of the screw shaft of the end face member in the axial direction, and an edge part of the through hole opposite to the convex part or the concave part. A bolt seat surface, a sealing member that seals the other end side of the hollow hole, and a taper screw hole that is formed in the sealing member and is smaller than the hollow hole and larger than the through hole. Screw parts. A hexagon socket head cap screw that can pass through the taper screw hole, and a hexagon socket head taper plug that closes the taper screw hole, and the screw side surface of the head of the hexagon socket head bolt contacts the bolt seat surface . The screw part according to claim 1, wherein the screw part is configured to be able to contact, and a threaded portion of the hexagon socket head cap screw can project from the end face member.
A cylindrical main body having a top opening disposed substantially horizontally so that the tip has an inclination of 0 to 5 ° and protruding upward and extending in the longitudinal direction; and the inside of the main body is rotatable about the longitudinal direction; and A screw conveyor having a screw provided with screw blades on the shaft, and a drive source for rotating the screw, wherein the screw is divided into a drive source side and a tip side, and the tip The screw component according to claim 2 is provided on the side, and the screw blade is arranged in phase with the screw blade of the screw component on the drive source side. A drive-side recess that fits into the projection or a drive-side projection that fits into the recess, and an internal thread that passes through the axis of the screw shaft are provided, By screwing the hexagon socket head bolts, and the drive source-side screw, the screw conveyor and the screw part is characterized in that it is integrated. The screw conveyor according to claim 3, further comprising: a bending guide portion connected to a tip of the main body; and a discharge pipe that rises obliquely upward following the bending guide portion.

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