JPH02123013A - Structure of spiral for conveyer and joint method thereof - Google Patents

Abstract

PURPOSE:To form the desired height and strength of a raking surface easily by joining plural spiral materials with spiral surfaces which can make line or surface contact with each other along their contact surfaces in the title spirals, for chips discharge in a cutting machine tool. CONSTITUTION:Each spiral material 10 formed with a sheet shape material with a comparatively flat rectangular section and a spiral material 20 formed with a bar material with a section comparatively similar to a square are jointed together along their spiral surfaces and the final end part 20a of the spiral material 20 set by extending by a predetermined length from the final end part 10a of the spiral material 10 is jointed with the final end part 20b of the spiral material 20. The final end 10b of the spiral material 10 extended beyond the final end 20b of the spiral material 20 is jointed with the extended end part 10a of the spiral material 10. Thus, the desired height and strength of a raking surface can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a novel structure of a spiral for a conveyor and a method of joining the spiral.

Problems with the Prior Art The applicant previously filed an application for utility model registration for the invention titled "Cut discharging device for cutting machine tools," and registered it as Utility Model Registration No. 1,624.982. I received it. This idea was developed as follows: ``A coil spring is disposed in a U-shaped groove continuous with the plate to catch the chips, and this is a chip discharging device for cutting machine tools in which the coil spring is driven to rotate within the groove. The coil spring has a radius less than or equal to the radius of the bottom curved portion of the groove, and the wire of the coil spring has a scraping surface that stands upright from the wall surface of the groove on the cut rice discharge side. , and is rotatably driven while being cantilevered at the base end of the coil spring.

The coil spring or spiral used in the above device may have any shape as long as it has a scraped surface that stands upright against the U-shaped groove wall surface as described above. However, for example, if the cross-sectional shape is 5
It is not easy to coil a spiral from a shape of a shape, a shape of two, a shape of a U, or a more complex shape. Furthermore, it is not easy to change the cross-sectional shape in the winding axis direction of the spiral.

In reality, a rod-shaped material with a generally rectangular cross-sectional shape is
The short side of the cross-sectional shape was arranged along the cylindrical envelope of the spiral, and the long side was arranged in the radial direction with respect to the winding axis of the spiral to form a spiral. This arrangement provides a substantially upright and tall scraping surface on the U-shaped groove wall of the spiral conveyor, and reduces the friction surface with the groove wall.

Orienting the long sides of the rectangular cross section in the radial direction with respect to the winding axis also has the effect of suppressing the diameter expansion movement of the spiral during operation.

Furthermore, if the dimension of the side along the cylindrical envelope inner shape in the cross section of the spiral material is large, chips are likely to accumulate thereon during operation of the spiral. The accumulated chips try to rotate with the spiral due to the centrifugal force caused by the rotation of the spiral, but depending on the combination of changes in the specific gravity, shape, and humidity of the accumulated chips, there is a possibility that the chips will be scattered. be. Therefore, in the cross section of the spiral material, it is desirable that the dimension of the side along the inner cylindrical envelope shape is short.

Furthermore, when coiling a spiral with a rectangular cross section, the material is stretched on the outside of the winding diameter and compressed on the inside of the winding diameter. In this case, the cross-sectional shape of the material after coiling has a trapezoid-like shape, with the dimensions of the sides along the outer shape of the cylindrical envelope of the spiral being shorter than the dimensions of the sides along the inner shape of the cylindrical envelope. Therefore, in reality, if you want to coil a spiral whose cross-sectional shape is close to a rectangle after coiling, place a rod-shaped material with a trapezoidal cross section with the base (long side) of the trapezoid on the side of the cylindrical enveloping outer shape of the spiral. However, the top side (shorter side) of the trapezoid was placed on the inner side of the cylindrical envelope for coiling.

General: During operation, the coil spring or spiral used in the above device is deformed so as to be compressed in the direction of the winding axis of the coil, and also deformed so that the coil radius is expanded.

In addition, since the coil spring or spiral used in the above device is placed in a U-shaped groove in which chips are deposited, the force applied to the spiral is a load that is uneven with respect to the central axis. receive. Further, one end of the spiral is rotated by a rotational drive means (hereinafter, the end connected to the rotational drive means is referred to as a proximal end, and the opposite end is referred to as a free end), and each spiral portion of the spiral is rotated. Since the chips present in the separate compartment formed by the scraping surface and the U-shaped wall surface are transported,
The loads applied to the spiral portion close to the proximal end of the spiral and the spiral portion proximate to the free end are different (a larger load is imposed on the proximal end). Therefore, as the axial length of the spiral increases, it is necessary to increase the cross-sectional area of the spiral filament at least in the spiral portion on the proximal end side of the rod-shaped material.

Coiling a spiral with a large filament cross-section requires a larger coiling machine. Also,
When coiling a rod-shaped material with an extremely large cross-sectional area,
In particular, when coiling is performed with a small radius of curvature, the deformation due to elongation and compression of the material becomes large on the outside and inside of the bend, and heating is required.

In addition, the length of a spiral varies depending on the site of use, but in order to manufacture a long spiral over 20 meters, for example, the space of the spiral manufacturing factory needs to be enlarged, and the length of the spiral There are also space issues when storing and transporting.

Therefore, in the past, one spiral was manufactured by dividing it into a plurality of short spiral parts, and these parts were joined at the site of use by an appropriate joining method such as welding. However, when end faces of adjacent spiral filaments are butt-joined, sufficient strength cannot be obtained at the joint. Therefore, a splint was applied to the helical surface of the joint region for joining.

In this case, it has been found that the entire part of the splice bulges out, and the stubble becomes easily clogged with chips, especially curled chips.

In addition, the applicant has also filed a separate application (Utility Application No. 58-7758).
In No. 8, Cut rice discharging device, Jitsukaiaki), we have proposed a new device that pushes up and conveys the cut grains. In this device, a spiral is placed in a generally horizontally oriented U-shaped groove, a cylindrical structure is provided at one end of the U-shaped groove to cover the end of the spiral, and the cylindrical structure is provided with a cylindrical structure. It is characterized by connecting two inclined ducts, and giving a gentle curve to the transition region between the cylindrical structure and the duct. The chips conveyed into the cylindrical structure by the spiral are pushed up inside the duct by the following chips. Since no spiral was placed inside the duct, the inclination angle of the duct was limited to about 45 degrees. Additionally, depending on the type and condition of the chips, there was a tendency for the chips to become compacted within the duct.

Therefore, the basic object of the present invention is to provide a spiral for a conveyor, which is formed by joining two or more spiral materials having helical surfaces that can be in line or surface contact with each other along their contacting spiral surfaces. It is to provide. By changing the cross-sectional dimensions and shape of two or more spiral materials to be joined,
By combining them in various ways, a spiral with a desired cross-sectional shape can be formed. Therefore, it is possible to provide a conveyor spiral having a desired scraping surface height and desired strength.

Another object of the present invention is to form two or more spiral materials having helical surfaces that can make line contact or surface contact with each other by joining them together along their contacting spiral surfaces, and in this case, The object of the present invention is to provide a spiral for a conveyor, in which at least one end of the spiral material is wound around each other and terminated at different positions in the axial direction.

Still another object of the present invention is to provide a novel structure of a long conveyor spiral which is suitable for manufacturing by dividing into a plurality of parts and joining them together at the site of use.

An additional object of the invention is to provide a new structure of a spiral section suitable for increasing the strength of the joint of a spiral section manufactured in multiple sections.

A further object of the invention is to provide a new spiral structure suitable for upward conveyance of chips.

Still another object of the present invention is to provide a method for joining the above-mentioned spiral portions.

Means for Solving the Problems The basic conveyor spiral of the present invention is realized by joining two or more spiral materials having spiral surfaces that can be in line or surface contact with each other along their spiral surfaces. It is formed.

The cross-sectional shapes and dimensions of the spiral materials to be joined may be the same or different.

In one embodiment of the present invention, at least one of the two or more spiral materials is formed of a material different from the remaining spiral materials, such as a material having hardness, toughness, etc.

In one embodiment of the present invention, at least one end of the conveyor spiral, two or more winding ends of the spiral material terminate at different positions in the direction of the winding axis.

According to the method of the present invention, the spiral material has a shape formed by joining together two or more spiral materials having spiral surfaces that can be in line contact or surface contact with each other along their spiral surfaces, and A conveyor spiral in which, at least one end in the direction, the corresponding spiral materials of two or more of the spiral materials terminate at different positions in the winding axis direction, where the two or more spiral materials correspond to each other. Prepare first and second conveyor spirals in which the spirals terminate at complementary positions in the direction of the winding axis, and at the one end of the first and second conveyor spirals, Corresponding end portions of the three or more spiral materials are respectively joined, and the two or more spirals at the one end of the first and second conveyor spirals are connected to each other along the contacting spiral surfaces. Join.

By the way, "J, in which the corresponding spiral materials of two or more of the above spiral materials terminate at different positions in the direction of the winding axis," refers to two spiral materials consisting of spiral materials A and B. At the end of the conveyor spiral in the direction of the winding axis, the winding end of A extends by a predetermined length from the winding end of B, and at the end of the other spiral in the direction of the winding axis, A This means that the winding end of B is set back from the winding end of B by the above length.

Function: Since one conveyor spiral is joined to two or more spiral materials along the contacting spiral surfaces, the conveyor spiral can be formed with a desired cross-sectional size and shape.

By changing the cross-sectional shape and material of each spiral material and combining them, various conveyor spirals can be designed depending on the purpose. For example, in the spiral for a conveyor, at least one of the two or more spiral materials is formed from a plate-like material having a flat rectangular cross section,
In this case, a conveyor spiral in which the long side of the rectangular cross section is oriented in the radial direction with respect to the winding axis of the spiral, and the spiral material of the plate-like material is extended by a desired length from the end of the other spiral material, is The extended portion of the spiral material formed from the shaped material can be inserted into a curved cylindrical duct by utilizing its flexibility in the direction intersecting the winding axis, and is used in the above-mentioned chip pushing up conveyance device. be able to. This allows the chips to be pushed up and conveyed at a steeper angle.

Corresponding pieces of two or more spiral materials having complementary ends are butt-joined at different positions in the direction of the winding axis, and the contacting spiral surfaces of the two or more spiral materials are mutually connected in different regions in the direction of the winding axis. They are mutually bonded over a wide area, thereby providing a strong bond. Thus, by joining multiple conveyor spirals in the same way as above,
A conveyor spiral of desired length can be formed.

Furthermore, the bulges seen in conventional joints using splints are not formed, so chips do not become clogged at the joint.

Furthermore, since the conveyor spiral is separated into a plurality of spiral materials and coiled, a conveyor spiral having a large cross-sectional area can be formed using a small coiling machine.

The above-mentioned and other advantages of the invention will become clearer on reading the following examples.

Embodiment FIGS. 1A and 1B are cross-sectional views of a portion of a conveyor spiral according to two embodiments of the present invention, and in FIG. 1A, the front half is indicated by a dotted line. . Arrow A indicates the direction of rotation of the conveyor spiral during operation. Thus, in these embodiments, the chips are conveyed to the left.

In the embodiment shown in FIG. 1A and 1, the conveyor spiral is formed from a spiral material IO formed from a plate-like material with a relatively flat rectangular cross section and a rod-like material having a relatively square rectangular cross section. The spiral material 20 is shown joined together along their spiral surfaces.

In the embodiment shown in FIG. 1A, the spiral material 20 formed from a rod-like material extends by a predetermined length beyond the terminal end 10a of the spiral material 10 formed from a plate-like material at the right end. In the example shown in FIG. spiral material 20
is shown extending beyond the terminal end 20b by a length equal to the previously obtained length and terminating at lOb.

These two conveyor spirals abut the extended end 20a of the spiral material 20 formed from the rod-shaped material in FIG. The terminal end portion 1 of the spiral material formed from the plate-like material shown in FIG.
0b is brought into contact with and joined to the extended end i 0 a of the spiral material formed from the plate-like material at the opening in FIG. Thus, the left side surface 21 of the extended portion of the spiral material formed from the rod-like material in FIG. The spiral surfaces of the two are in surface contact, and these surfaces are also joined by an appropriate joining method such as welding.

As a result, the joint area is significantly increased compared to the conventional butt joint of the ends of two spirals, and the two conveyor spirals can be joined at positions separated in the winding axis direction of the ends of the two materials. The two butt joints and the face-to-face joint along the helical plane of the two materials over a certain length in the direction of the winding axis provide an extremely strong joint against the operating loads. Furthermore, no bulging portion is formed at the joint portion between them.

In addition, since the conveyor spiral is coiled separately into two spiral materials, the spiral material 20 formed from a rod-like material and the spiral material 10 formed from a plate-like material, it is possible to coil the conveyor spiral material without using a large coiling machine or by heating it. A conveyor spiral with a large cross-sectional area can be formed without inter-coiling.

In the embodiments shown in FIG.
l is longer than the length W2 of the long side of the cross section of the spiral material formed from the rod-shaped material. This allows the area of the scraped surface to be increased. Furthermore, as is easily understood, by using a material with high hardness as the plate-like material, it is possible to suppress the wear of the surface 22 along the cylindrical enclosing outer shape of the spiral material formed from the rod-like material. In addition, a spiral material 20 formed from a rod-shaped material
The cross-sectional shape of may be circular or other shapes. If there is no need to connect multiple conveyor spirals in the direction of the winding axis, there is no need to shift the winding ends of the two spiral materials 10920 wound from the plate-like material and the rod-like material shown in Fig. 1 A and the opening. .

In the embodiment described above, a surface 12 along the cylindrical envelope outer shape of the spiral material IO formed from a plate-shaped material, and a surface 22 along the cylindrical envelope outer shape of the spiral material formed from a rod-shaped material. However, by extending the spiral surface 12 of the plate-shaped material to the outside of the spiral surface 22 of the bar-shaped material, the spiral of the bar-shaped material is aligned on the wall surface of the 0-shaped groove. It is also possible to prevent the surface 22 along the cylindrical outer shape of the spiral conveyor from coming into contact with the U-shaped groove wall surface of the spiral conveyor. The reduction in contact surface reduces the load on the spiral. Furthermore, since the winding diameter of the spiral of the rod-shaped material is reduced, less material is required for the rod-shaped material, and the weight of the welded spiral can also be reduced.

FIGS. 2A to 2C show cross-sectional views of an embodiment in which a spiral 10 made of a plate-like material is joined to different surfaces of a spiral 20 made of a rod-like material. It goes without saying that complementary extensions can be joined in these embodiments as well.

In the embodiment shown in FIG. 2A, the spiral IO of the plate-like material is
Surface 22 along the cylindrical envelope outer shape of the spiral of the rod-shaped material
is joined to. In this case, by using a material with high hardness as the plate-like material, the service life caused by wear of the spiral can be extended. Further, the height of the scraped surface is increased by the length or thickness of the short side in the cross section of the spiral 10 of the plate-like material. In the embodiment shown in FIG. 2A, by forming the two joined spiral materials 10°20 from rod-shaped materials with the same cross-sectional shape,
It is also possible to double the height of the scraped surface. Such a spiral for a conveyor is difficult to cold-work because the deformation due to compression and expansion becomes large on the inside and outside of the bend. Furthermore, in the embodiment shown in FIG. 2A, the cross-sectional shape of the spiral material 20 may be circular or other shapes.

In the embodiment shown in FIG. 2, the spiral 10 made of a plate-like material is
It is joined to the surface 23 of the rod-shaped material on the opposite side to the spiral scraped surface. In this embodiment as well, the length of the long side in the cross section of the spiral IO of the plate-like material is longer than the length of the long side in the cross-section of the spiral of the bar-like material. Thus, it is clear that the embodiment of FIG. 1 has similar effects.

In the embodiment shown in FIG. 2C, the spiral 1 of the plate material
0 is joined to a surface 24 that follows the inner shape of the cylindrical envelope of the spiral 20 made of a rod-shaped material. In this embodiment, the height of the scraped surface is increased by an amount corresponding to the thickness of the plate material, similar to the embodiment shown in FIG. 2A. In order to improve wear resistance, a hard material must be used as the rod material.

The spirals at the opening in FIG. 1 and the opening in FIG. 2 can be used to push up and convey chips. FIG. 3 is a schematic cross-sectional view of a chip conveying device showing a mode in which these spirals are used to push up and convey chips. In Figure 3, 3
1 is a U-shaped groove, 32 is a cylindrical duct, and the spiral part 33 drawn with a thick solid line is the part where the spiral of the plate-like material and the spiral of the rod-like material are joined.
Spiral portions 34 drawn with thin solid lines each indicate an extension of the spiral of the plate-like material. Since the spiral extension portion 34 of the plate-like material has its long side in cross section arranged in a radial direction with respect to the central axis of the spiral, the central axis of the spiral is easily deformed. Therefore, the spiral plate-shaped material can be inserted into the curved duct 32. Thus, the radius of curvature of the joint between the duct and the U-shaped groove 31 can be made smaller, and the slope of the duct can be made steeper than that of the duct in the device of the aforementioned separate application. Furthermore, in the device of the separate application, when transporting fine chips in a wet state, the chips tended to be compacted within the duct.

When the spiral of the present invention is used, the spiral made of a plate-like material is placed inside the duct, so this drawback is eliminated. Therefore, chips can be transported to a high level in a small space. In addition, in the device of the separate application, since the entire cross-sectional area of the duct is filled with chips, it was desired that the diameter of the duct be expanded in the conveying direction, but in the case of FIG. 3 of the present invention, By increasing the slope of the duct, excess chips can flow back over the scraping surface, preventing the entire cross-sectional area of the duct from being filled with chips, thus eliminating the need to enlarge the duct. .

Although the present invention has been described in detail through several embodiments above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical idea of the present invention. For example, although rod-shaped materials and plate-shaped materials have been illustrated and described as having rectangular cross-sectional shapes, it is clear to those skilled in the art that these materials do not necessarily have to have rectangular cross-sectional shapes. Probably. For example, the angle of the scraping surface with respect to the 0-shaped groove wall surface (the inclination of the scraping surface below with respect to the conveying direction of chips) does not need to be 90 degrees. However, the smaller the angle is than 90 degrees, the greater the tendency for the conveyor spiral to ride on the chips;
The larger the angle of the scraped surface is than 0 degrees, the greater the tendency for chips to climb over the scraped surface. This is a well-known fact in conventional scrapers.

Furthermore, two or more spiral materials formed from a plate-shaped material may be joined to two or more surfaces of one spiral material formed from a rectangular rod-shaped material, respectively. t; A plurality of rod-shaped materials having a circular cross section may be joined to one or more surfaces of one spiral material.

Furthermore, one end of three or more spiral materials formed from a plate-shaped material is sequentially shifted in the direction of the winding axis and terminated, so that the cross-sectional shape of the conveyor spiral gradually tapers toward the free end. It is also advantageous to thereby reduce the dead weight of the spiral.

Moreover, a hollow spiral for a conveyor can also be formed by joining four spiral materials formed from plate-shaped materials.

In the embodiment shown in FIG. 2A, the length of the long side of the cross section of the rod-like material can be made longer than the length of the short side of the cross-section of the plate-like material. In this case, by making the short side of the scraped surface of the plate material protrude from the surface along the long side of the scraped surface of the bar material, the effect of scooping up the chips can be obtained.

In the embodiments shown in FIGS. 1 and 2, the cross section of the rod-shaped material spiral 20 was explained as having its long side arranged in a radial direction with respect to the central axis of the spiral. They may be arranged along the outer shape of the case. This advantage is that the sum of the respective cross-sectional areas of the plate-like material spiral and the bar-like material spiral can be kept to a minimum, thereby increasing the stiffness of the joined spiral against axial loads. In this case, since the width of the spiral inner surface 24 increases, there is a tendency for the chips to scatter. This can be avoided, for example, by slanting the inner surface 24 of the spiral of the rod-shaped material (having a trapezoidal cross-sectional shape) as shown in Figure 4-d. Chips on the inclined surface are easily shaken off into the zero-shaped groove by the vibration of the spiral during operation.

In the case of a long spiral or a spiral with a large axial load, it is necessary to increase the cross-sectional area of the spiral of the rod-shaped material. This increases the inner surface of the spiral and thus increases the scattering tendency mentioned above.

In this case as well, it is desirable to make the inner surface of the spiral of the rod-shaped material inclined (to make the cross-sectional shape larger).

In the push-up conveyance shown in FIG. 3, it is also advantageous to make the modifications shown in FIG. 5 to the extension 34 of the spiral material formed from a plate-like material. In the embodiment shown in FIG. 5, another spiral material 36 is bonded to a surface 35 of the extended portion 34 of the spiral material along the inner cylindrical envelope shape. A portion of the spiral material 36 extends 38 in the direction of conveyance of chips from a scraping surface 37 acting as a pushing surface for the extension 34 of the spiral material.

This extension 38 reduces the back flow of chips when the chips are conveyed through a steep duct.

t; However, if the dimensions and shape of the cross section of the spiral 36, especially the dimensions of the extension part 38 in the direction of the winding axis, are made too large,
It must be noted that the overall rigidity of the spiral portion 34 is increased, bending occurs, making it difficult to insert into the duct, and causing increased friction with the duct during operation.

[Brief explanation of drawings]

1A and 1B are cross-sectional views of two complementary conveyor spirals according to an embodiment of the present invention, and FIGS. 2A to 2C are cross-sectional views of conveyor spirals according to another embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of a cut rice conveying device using the conveyor spiral at the entrance in FIG. Cross-sectional view of a conveyor spiral according to an example. FIG. 5 is a cross-sectional view of a conveyor spiral according to still another embodiment of the present invention. Description of symbols IO: Spiral material formed from a plate-like material, ioa
, lQb: end of spiral material, 20: spiral material formed from rod-shaped material, 20a. 20b: end of spiral material 20, 31: O-shaped groove, 32: cylindrical duct, 33: spiral part for conveyor where rod-shaped spiral material and plate-shaped spiral material are joined, 34: plate-shaped Spiral part for conveyor made only from spiral material,

Claims (1)

[Scope of Claims] [1] A conveyor spiral having a scraping surface facing one side in the direction of the winding axis, comprising: a) the conveyor spiral having a spiral surface capable of making line contact or surface contact with each other; A spiral for a conveyor, characterized in that it is formed by joining two or more spiral materials to each other along a contact spiral surface. [2] In the conveyor spiral according to claim 1, a) at least one end of the conveyor spiral, two or more winding ends of the spiral material terminate at different positions in the winding axis direction. A spiral for conveyors that features: [3] The conveyor spiral according to claim 1 or 2, characterized in that the two or more spiral materials have different cross-sectional shapes. [4] In the conveyor spiral according to any one of claims 1 to 3, at least one of the two or more spiral materials is made of a harder material than the remaining spiral materials. A spiral for conveyors that is characterized by: [5] a) It has a shape formed by joining two or more spiral materials having helical surfaces that can be in line or surface contact with each other along their spiral surfaces, and has a shape that is formed by joining together along the spiral surfaces, and A conveyor spiral in which, at least one end, two or more of the spiral materials terminate at different positions in the direction of the winding axis, wherein corresponding ones of the two or more spiral materials terminate in the direction of the winding axis. providing first and second conveyor spirals terminating in complementary positions; b) said two or more spiral materials at said one end of said first and second conveyor spirals; c) respectively joining the two or more spiral materials at the one end of the first and second conveyor spirals along the contacting spiral surfaces; A method for joining two conveyor spirals, characterized by the following.