JP3009484U - Bearing material for screw rod in helical auger drilling machine - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a bearing material for a screw rod in a helical auger drilling machine, which does not generate iron powder due to wear and scatter, and also suppresses noise generation. [Structure] The bearing member 31 comprises a bush having an engaging flange 31A at each of the upper and lower edges of a cylinder having an inner diameter that can be externally inserted into the journal portion of a screw rod with a predetermined tolerance, and a bush that divides the circumference into two parts. It is formed of a hard elastic body in a shape divided in the direction. The bearing material 31 has its key groove 31.
The C is fitted to the key and mounted on the journal part of the screw rod, and the spectacle band is pressed from the outer peripheral side of the screw rod so that it cannot be removed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a helical auger type boring machine, in which a steady rest bearing member for rotatably bundling a plurality of screw rods arranged in parallel with each other while keeping an axial interval between them, and a bearing material interposed between the screw rods. Regarding

[0002]

[Prior art]

 In the soil column wall construction method, which is one of the construction methods for civil engineering foundation work, some helical auger type boring machines used for boring have an auger equipped with multiple screw rods. In such a helical auger type drilling machine having a plurality of screw rods, steady rests are provided in various places in the longitudinal direction of the screw rods.

The steady rest is constructed by a so-called spectacle band as a steady rest bearing member having a shape in which cylindrical bearing members that can be externally inserted into the screw rod are connected and integrated in parallel at an interval equal to the arrangement interval of the screw rods. The screw rods are bundled, and a metal member is interposed between the spectacle band and the screw rods to allow the screw rods to rotate.

The screw rod, to which the spectacles band is attached, has two position regulating flanges provided at intervals capable of accommodating the metal members in the journal portion of the screw rod. A key is provided, and the metal member is fitted between the positioning flanges and engages with the key to be mounted so as not to rotate relative to each other.

As shown in FIG. 14 which is a half sectional view of the metal member in a combined state, the metal member has a cylindrical shape with engaging flanges 3 A projecting from the outer periphery of both ends and is formed in two in the radial direction. At the same time, a step portion 3B is formed on the end face side of the engagement flange along the dividing line, and the step portion 3B is formed by dividing the engaging flange 3A into a dividing line in a state in which the metal member divided into two is combined. A keyway 3C (in the radial direction) is formed along the above.

The spectacle band has a thickness that fits between the engaging flanges at both ends of the metal member in the direction of the central axis of the screw rod, and is divided into two parts in a plane connecting the centers of the bearing members (centers of the screw rods). It is divided and fits between the engaging flanges of the metal members attached to the journal part of the screw rod, and the metal members are held irremovably while being held between them and the screw rod. It is something that

In the steady rest configured as described above, the spectacle band is supported by the screw rod through the metal member, and the plurality of screw rods are bundled to restrict the relative position change thereof, thereby suppressing the vibration. Since the key groove of the metal member is engaged with the key of the journal part of the screw rod, the metal member rotates together with the screw rod during drilling, and the outer peripheral surface of the metal member slides on the inner peripheral surface of the spectacle band. To do. In other words, the metal member rotates within the spectacle bearing member, so that the metal member or the spectacle band is worn but the screw rod (journal part) is not worn. The worn metal member or the spectacle bearing member is to be replaced as appropriate.

[0008]

[Problems to be solved by the device]

 However, in the above-described conventional steady rest structure, the metal member and the mega band are generally formed of a metal such as rolled steel for general structure, and the rotation of the metal member causes wear of the metal member or the eyeglass band. There was a problem that the iron powder generated as a result was scattered around and generated a lot of noise, which caused dust pollution and noise pollution during construction in urban areas.

Further, for the purpose of preventing such dust pollution and noise pollution, it has been proposed to replace the metal member with one made of FRP, but FRP has a low elongation property and is weak against impact although it has strength. Therefore, the wear of the members is remarkable, and frequent replacement is required, which is a practical problem.

The present invention has been made in view of the above problems. Iron powder does not generate and scatter due to wear, noise can be suppressed, and wear resistance is higher than that of FRP. The purpose of the present invention is to provide a bearing material for a screw rod in a helical auger type boring machine having excellent properties.

[0011]

[Means for Solving the Problems]

 The present inventor has conducted research and experiment to solve the above problems, and as a result, when using medium-hard elastic material of various materials considered as bearing materials, there is no possibility of causing dust pollution and noise pollution. In addition, the present inventors have found that it is possible to provide a bearing material having much higher wear resistance than FRP, and have reached the present invention.

The auger bearing material in the helical auger drilling machine of the present invention that achieves the above-mentioned object is a steady rest bearing member for rotatably bundling the screw rods of the auger in the helical auger drilling machine and the screw. A bearing material that is interposed between rods, and is formed by splitting a cylinder with engaging flanges at both ends in the radial direction by a hard elastic body. Is fitted to the journal portions of the screw rods provided at predetermined intervals in the direction, and is held so as not to fall off by the steady rest bearing members fitted between the engaging flanges. And

As the hard elastic body, polyurethane or thermoplastic elastomer is suitable. Further, as a hard elastic body, a hardness Shore type hardness meter D type 60 to 75, a tensile strength of 300 kgf / cm ² or more, an elongation of 100% or more, and a Young's modulus of about 2000 to 3000 kgf / cm ² are preferable.

Further, the journal portion of the screw rod is provided with engaging protrusions at two locations adjacent to opposite side surfaces of the both position regulating flanges and dividing the outer periphery into two substantially equal parts. The material is characterized in that an engaging concave portion is formed on the outer end surface of the engaging flange along the radial direction substantially orthogonal to the dividing surface, and the engaging convex portion is fitted to the engaging concave portion.

In one embodiment of the present invention, the bearing material is formed with a plurality of holes in the sliding surface, and the through holes are filled with a lubricant. .

Further, in one embodiment of the present invention, a metal bone member is embedded in the bearing material.

Further, in an embodiment of the present invention, a convex portion and a concave portion which are engaged with each other are provided on the outer peripheral surface of the position regulating flange of the screw rod and the outer end surface of the engaging flange of the bearing material. The difference between the frictional force between the inner peripheral surface of the bearing material and the outer peripheral surface of the journal portion of the screw rod, and the frictional force between the outer peripheral surface of the bearing material and the inner peripheral surface of the steady rest bearing portion material. According to the above, it slides with respect to either one of the outer peripheral surface of the journal portion of the screw rod and the inner peripheral surface of the steady rest bearing member.

Further, in another embodiment of the present invention, an engagement flange along a radial direction substantially orthogonal to an end portion of the steady rest bearing member facing the engagement flange and a split surface of the bearing material. The engaging convex portion is formed on either one of the end surfaces of the above, and the engaging concave portion into which the engaging convex portion is fitted is formed on the other end surface.

Further, in another embodiment of the present invention, in the structure in which the engagement recess is formed, a steel band for binding the engagement flange is provided around the engagement flanges at both ends. It is characterized by

Further, in another embodiment of the present invention, the bearing material is interposed between a steady rest bearing member that rotatably bundles screw rods of an auger and the screw rod in a helical auger drilling machine. The journal part of the screw rod, which is a bearing material formed by a hard elastic body into a shape in which a cylinder is divided into two in the radial direction, and two position regulating flanges are provided at predetermined intervals in the axial direction. And is fixed to the inner peripheral side of the steady rest bearing member to form a lining of the steady rest bearing member.

[0021]

[Action]

 The bearing material of the screw rod in the helical auger drilling machine having the above structure is attached to the journal portion of the screw rod, and cannot be removed by the steady rest bearing member fitted between the engaging flanges. When the screw rod rotates, it slides between its inner peripheral surface and the outer periphery of the screw rod, or between its outer peripheral surface and the inner surface of the steady rest bearing member, so that the elasticity of the hard elastic body does not generate noise. , Does not cause wear of the sliding partner and does not generate iron powder.

In addition, the engagement protrusion provided on the journal portion of the screw rod and the engagement recess formed on the outer end surface of the engagement flange along the radial direction substantially orthogonal to the dividing surface are fitted. As a result, the bearing material cannot rotate relative to the screw rod, and the journal part of the screw rod does not wear. Also, when the bearing material rotates with the rotation of the screw rod, the front side in the rotation direction of the engaging convex portion is pressed and the rear side in the rotation direction is pulled, and the area where the pressing force is applied and the pulling force are applied. The bearing material is not largely deformed by being divided into two regions where the action is applied, and wear is small.

Further, in the structure having the engaging concave portion, by disposing the steel band around the engaging flange, the two-divided bearing member is integrally fixed, and the engaging convex portion is increased due to the progress of wear. Can be prevented from coming off the engaging recess.

In addition, by forming a plurality of holes in the bearing material on the sliding surface and filling these holes with a lubricant, the lubricant exudes as the bearing material wears and performs a lubricating action, resulting in wear. Decrease.

In addition, by forming a plurality of holes in the bearing material on the sliding surface and filling these holes with a lubricant, the lubricant seeps out as the bearing material wears and performs a lubricating action, so that the wear is reduced. Decrease.

Further, by embedding a metallic bone member in the bearing material, the bearing material can be reinforced when it is difficult to maintain the shape due to the hardness of only the hard elastic body.

Further, by not providing the convex portion and the concave portion which engage with each other on the outer peripheral surface of the position regulating flange of the screw rod and the outer end surface of the engaging flange of the bearing material, the wear of the bearing material progresses. However, there is no risk of the bearing material being damaged by the key being pushed in, and the bearing material can be made to last longer.

Further, the bearing material is formed into a shape in which a cylinder is divided into two in the radial direction, is fitted to the journal portion of the screw rod, and is fixed to the inner peripheral side of the steady rest bearing member to form a lining. As a result, even if wear of the bearing material progresses, there is no risk that the key will separate from the key groove, and the bearing material can last longer.

[0029]

[Example of device]

 An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view of a helical auger drilling machine to which an embodiment of a screw rod bearing material of a helical auger drilling machine according to the present invention is applied, and FIG. 2 is an enlarged front view of a steady rest thereof. .

In the helical auger drilling machine 1 shown in FIG. 1, the auger 2 includes three screw rods 20 (20A, 20B, 20C) arranged in parallel.

The screw rods 20 are arranged in parallel on the same plane at a predetermined interval where the outer diameter of the screw 21 overlaps by a predetermined amount, and each screw rod 20 has three steady rests 30 (upper steady rest 30A). , An intermediate steady rest 30B and a lower steady rest 30C).

In the steady rest 30, a spectacle band 32 as a steady rest bearing member is attached to the journal portion 22 of the screw rod 20 via a bearing material 31, and the spectacle band 32 allows the screw rod 20 to rotate and to move relative to each other. It is configured by bundling so that the position cannot change.

As shown in the front view in FIG. 3 (A) and the side view in FIG. 3 (B), the journal portion 22 of the screw rod 20 is provided with position regulating flanges 22A having a predetermined thickness at predetermined intervals in the axial direction. Keys 22B as engaging projections are provided in notches with a predetermined width formed at two symmetrical positions (two on the circumference 180 ° apart) that are individually provided and sandwich the center of the position regulating flange. 22A is fixed to the opposite side (journal portion 22 side) by projecting a predetermined amount.

As shown in a perspective view of FIG. 4, the bearing member 31 is formed by dividing a cylindrical bush having upper and lower edges with engaging flanges 31A in the axial direction so as to divide the circumference into two equal parts. It is formed of a hard elastic body having hardness: Shore type hardness tester D type 60 to 75. In other words, by combining two pieces, a cylindrical bush is constructed. The inner diameter of the screw rod 20 can be fitted into the journal portion 22 of the screw rod 20 with a predetermined tolerance, and the height (thickness in the axial direction) of the screw rod 20 is within a predetermined tolerance between the position regulating flanges 22A of the journal portion 22. It is set to mate. On the outer end surface of the engaging flange 31A, there is formed a key groove 31C as an engaging recess in a radial direction (a position approximately 90 ° in the circumferential direction with the dividing surface 31B) substantially orthogonal to the dividing surface 31B.

As the hard elastic body, there are polyurethane such as urethane resin and urethane rubber and thermoplastic elastomer, and as the kind of the thermoplastic elastomer, there are styrene-budadene type, olefin type, polyester type and the like.

The spectacle band 32 is formed of a general structural rolled steel material, and as shown in FIG. 5 which is a plan view, is a cylinder having an inner diameter and a height that can be fitted to the outer periphery between the engaging flanges 31A of the bearing material 31. A split bearing 32A having a shape obtained by splitting is divided into parallel parts by a connecting plate 32B along the split surface at an interval equal to the installation interval of the screw rod 20. By facing two of them and fastening the connecting plates 32B to each other with bolts and nuts, bearing portions 32C capable of rotatably holding the bearing material 31 are arranged side by side at intervals equal to the screw rod 20. It is designed to have a shape.

The bearing material 31 is attached to the journal portion 22 of the screw rod 20 by fitting the key groove 31C into the key 22B, and is held by the spectacle band 32 from the outer peripheral side of the bearing material 31 so as not to fall off. . The spectacle band 32 is sandwiched between the engaging flanges 31A of the bearing material 31 mounted on the journal portion 22 of the screw rod 20, and the bearing material 31 is fitted in the bearing portion 32C from the screw rod 22. The screw rod 20 is held so as not to fall off, and at the same time, it is attached to the screw rod 20 so as not to fall off. That is, the bearing material 31 cannot move in the axial direction due to the position regulating flange 22A of the journal portion 20 of the screw shaft 20, and accordingly, the glasses fitted between the engaging flanges of the bearing material 31. The band 32 also cannot be removed from the screw rod 22.

In the steady rest 30 configured as described above, the spectacle band 32 restricts a change in the interval between the screw rods 20 to prevent vibration. The bearing material 31 cannot rotate relative to the journal portion 22 (screw rod 20) because the key groove 31C is engaged with the key 22B of the journal portion 22, and rotates together with the screw rod 20. Since the spectacle band 32 does not rotate because it bundles the three screw rods 20 ..., The rotation of the bearing member 31 in the bearing portion 32C of the spectacle band 32 allows the screw rod 20 to rotate.

Since the bearing material 31 rotates in the bearing portion 32C of the spectacle band 32, the outer periphery of the bearing material 31 and the inner peripheral surface of the bearing portion 32C slide, but the bearing material 31 does not wear. Since it is made of tongue rubber, its elasticity absorbs vibration accompanying rotation of the screw rod 20 and suppresses the generation of noise. Further, since the hardness is lower than that of the spectacle band 32 formed of the general structural rolled steel material, the bearing portion 32C is not worn, and therefore iron powder is not generated. The physical properties of the hard elastic body are as follows: hardness: Shore type hardness meter D type 60 to 75, tensile strength: 300 kgf / cm ² or more, elongation: 100% or more, Young's modulus: about 2000 to 3000 kgf / cm ² is appropriate.

Further, the hard elastic body has good wear resistance and high durability, but the key groove 31C fitted with the key 22B of the journal portion 22 of the screw rod 20 has the engagement flange of the bearing member 31. Since the outer end face of 31A is formed along the radial direction orthogonal to the split surface 31B, the step portion formed along the split surface of the bearing material 31 is formed as compared to the conventional one in which the step portion forms the key groove. Less deformation and more durable. That is, as shown schematically in FIG. 6, in the case where a step portion formed along the dividing surface constitutes a key groove as in the conventional case, one end of the bearing member 3 which is split in half is pressed by the key 4. The bearing member 3 is rotated by, but the acting force of the rotating force presses the entire bearing member 3 against the inner surface of the bearing portion 5 of the spectacle band because the acting direction of the rotating force is different from the moving direction of the rotation front end by 180 °. If there is a fitting gap between the outer circumference of the bearing material 3 and the bearing portion 5, the fitting material is deformed and pressure-contacted by that amount, and wear is accelerated. This tendency is particularly noticeable in a bearing material made of a hard elastic material, which has a lower rigidity than that of a conventional bearing material made of metal. On the other hand, in the present embodiment, as shown schematically in FIG. 7, in the case where the key groove 31C is formed in the radial direction (circumferential center) orthogonal to the split surface of the bearing material 31, the key groove 31C is The front part in the rotational direction is pressed by the rotational force, and the part in the rear direction in the rotational direction is pulled. The range in which the rotational force presses the bearing material 31 against the inner peripheral surface of the bearing portion 32C is half that of the conventional one. It is in the range of 90 °, which is half the difference between the acting direction of the rotational force and the moving direction of the front end of the rotating direction, and the deformation of the bearing material 31 is extremely small. Therefore, the wear is small and the durability is improved. .

In the above embodiment, the bearing member 31 is configured to rotate together with the screw rod 20 and slide with the spectacle band 32. However, the screw rod 20 and the spectacle band 32 are made of metal. On the other hand, since the bearing material 31 is a hard elastic body, the key 22B is not provided in the journal portion 22 of the screw rod 20 (the key groove 31C of the bearing material 31 is not necessary), and the rotation of the bearing material 31 is restricted. It may be configured not to. That is, as shown in FIGS. 10A and 10B, the outer peripheral surface of the position regulating flange 22A and the outer end surface of the engaging flange 31A are not formed with a key and a key groove for mutual engagement. In this case, the bearing material 31 is a balance between the frictional force between the outer peripheral surface of the bearing member 31 and the inner peripheral surface of the split bearing 32A of the spectacle band 32, and the frictional force between the inner peripheral surface and the outer peripheral surface of the journal portion 22 of the screw rod 20. The surface on which sliding occurs is determined, and the inner peripheral surface of the bearing material 31 and the outer peripheral surface of the journal portion 22 may also slide, but this does not cause any problem because the screw rod 20 is hardly worn.

In the configuration including the key 22B and the key groove 31C, as the wear progresses, the gap between the screw rod 20, the bearing member 31, and the spectacle band 32 becomes large, so that the key 22B is caught in the key groove 31C. In the end, the key 22B will come out of the key groove 31C, and the bearing material body will be hard to be damaged, but the bearing material body will be damaged. The bearing material can be made to last longer without the risk of damage to the body.

In addition, in the configuration including the key 22B and the key groove 31C, in order to prevent the key 22B from coming off the key groove 31C due to the progress of wear, as shown in FIG. A semi-annular groove 58 is formed in the opening of the portion 31A, and a steel band 60 provided with an appropriate metal fitting (not shown) for adjusting the diameter is disposed in the groove 58, and each flange 31A is tied with the steel band 60. By doing so, the two-divided bearing member 31 may be integrally fixed.

Further, in order to further reduce wear and improve durability as compared with the above embodiment, a bearing member 31 is formed as shown in FIG. 8 which is a half sectional view of a combined state. A plurality of small-diameter holes 31D may be formed and filled with a lubricant such as petrolatum. According to this, as the bearing material 31 is worn out, the lubricant exudes and performs a lubricating action, and wear is reduced.

Further, in the above embodiment, the bearing material 31 was formed only of the hard elastic body, but when it is difficult to maintain the shape due to its hardness, as shown in the half cross-sectional view of FIG. 9, the metal bone member is used. It may be formed by inserting and reinforcing 31E. In the figure, the key groove 31F is formed in the divided portion 31B.

In each of the above-described embodiments provided with the key and the key groove, the key is provided on the screw rod 20 side, and the bearing member 31 rotates together with the screw rod 20 to allow the bearing member 31 to rotate. Although wear occurs between the outer surface and the spectacle band 32, conversely, as shown in FIG. 11, the key 40 is provided near the upper and lower end surfaces 32D of the spectacle band 32, and the split surface of the engaging flange 31A of the bearing member 31 is provided. A key groove 42 may be formed on the opposing inner end surfaces of the engaging flange 31A along a radial direction substantially orthogonal to (in this case, the screw rod 20 is not provided with a key). In this case, the bearing material 31 is fixed to the spectacle band 32, and wear occurs between the screw rod 20 and the inner peripheral surface of the bearing material 31 (because the rod is made of super steel, most of the bearing material 31 is worn). To). Further, the key may be provided on the bearing member 31 and the key groove may be provided on the spectacle band 32.

In each of the above embodiments, the bearing material 31 is formed separately from the spectacle band 32, and the bearing material 31 and the spectacle band 32 are fixed to each other in the embodiment of FIG. The bearing material 31 and the spectacle band 32 of the body are fixed to each other by the engagement of the key 40 and the key groove 42. By lining the bearing material on the spectacle band 32, the spectacle band 32 is completely integrated with the spectacle band 32. It can also be configured as a standard. FIG. 12 shows an example thereof. In the embodiment of FIG. 12, a bearing member 50 made of urethane and having a cylindrical shape divided into two in the radial direction is fixed to the inside of the spectacle band 32 by baking or the like to form a lining. In this case, the upper and lower ends 50A of the bearing member 50 need not have engaging flanges, and neither member needs to have a key and a key groove. In this structure, the gear band 32 lined with the bearing material 50 may be fitted and fixed to the journal portion 22 between the two upper and lower position regulating flanges 22A of the screw rod 20. The operation of this structure is the same as that of the embodiment of FIG. 11, but since the key and the key groove are not provided, there is no risk of the key coming off from the key groove as the bearing material wears, and the bearing material can be made to last longer. effective.

[0048]

[Effect of device]

 As described above, according to the bearing material of the screw rod in the helical auger drilling machine according to the present invention, the hard elastic body is provided with engaging flanges at both ends of the cylinder and is formed in two in the radial direction. By fitting the position control flanges to the journal part of the screw rod that is provided at a predetermined interval in the axial direction, and is held so as not to fall off by the steady rest bearing member that fits between the engaging flanges. When the screw rod rotates, the elasticity of the hard elastic body absorbs vibrations, so there is less noise, and the sliding partner does not wear, so iron powder is not generated. Therefore, noise pollution and dust pollution will not occur even during the drilling work in urban areas.

Further, the journal portion of the screw rod is provided with engaging projections provided at two places which divide the outer peripheries of the opposite sides of the both position regulating flanges into substantially equal parts, and the outer end surface of the engaging flange of the bearing material. To the outer end surface of the engaging flange along the radial direction that is substantially perpendicular to the dividing surface, and engage the engaging concave portion formed so that the engaging convex portion fits, and the bearing material together with the screw rod. By rotating so that its outer circumference slides against the steady rest bearing member, the journal part of the screw rod will not be worn away, and the area where the pressing force acts due to the rotating force of the screw rod will be pulled. The area on which the pressing force acts is narrowed by being divided into the area on which the force acts, and the deformation of the bearing material is suppressed, which reduces wear and improves durability.

Further, in the structure having the above-mentioned engaging concave portion, by disposing the steel band around the engaging flange, the two-divided bearing members are integrally fixed, and due to the progress of wear, the engaging convex portion is Can be prevented from coming off the engaging recess.

By forming a plurality of holes in the bearing material on the sliding surface and filling these holes with a lubricant, the lubricant seeps out as the bearing material wears and performs a lubrication action, resulting in wear. Decrease.

Further, by embedding a metallic bone member in the bearing material, the bearing material can be reinforced when it is difficult to maintain the shape due to the hardness of only the hard elastic body.

Further, by not providing the convex portion and the concave portion that engage with each other on the outer peripheral surface of the position regulating flange of the screw rod and the outer end surface of the engaging flange of the bearing material, the wear of the bearing material progresses. However, there is no risk of the bearing material being damaged by the key being pushed in, and the bearing material can be made to last longer.

Further, the bearing material is formed into a shape in which a cylinder is divided into two in the radial direction, is fitted to the journal portion of the screw rod, and is fixed to the inner peripheral side of the steady rest bearing member to form a lining. As a result, even if wear of the bearing material progresses, there is no risk that the key will separate from the key groove, and the bearing material can last longer.

[Brief description of drawings]

FIG. 1 is a side view of a helical auger type boring machine to which a bearing material of a screw rod in a helical auger type boring machine according to the present invention is applied.

FIG. 2 is an enlarged front view of a steady rest.

FIG. 3A is a front view of a journal portion of a screw rod, and FIG. 3B is a side view.

FIG. 4 is a perspective view of a bearing material.

FIG. 5 is a plan view of a spectacle band.

FIG. 6 is a conceptual diagram showing the operation of a bearing member having a conventional structure.

FIG. 7 is a conceptual diagram showing the action of the bearing material of the example of the present application.

FIG. 8 is a half cross-sectional view of a state in which bearing materials having a lubricating function are combined.

FIG. 9 is a half cross-sectional view showing a state where a bearing material reinforced by a bone member is combined.

10A and 10B are views showing an embodiment of a bearing material in which a key and a key groove are omitted, FIG. 10A is a side view, and FIG. 10B is a perspective view.

FIG. 11 is a perspective view showing an embodiment in which a key is provided on a spectacle band and a key groove is provided on a bearing material.

FIG. 12 is a perspective view showing an embodiment in which a spectacle band is lined with a bearing material.

FIG. 13 is a judgment surface view showing an embodiment in which an engaging flange portion is tied with a steel band.

FIG. 14 is a half sectional view showing a state in which bearing materials of a conventional example are combined.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Helical auger type boring machine 2 ... Auger 20 (20A, 20B, 20C) ... Screw rod 22 ... Journal part 22A ... Position regulation flange 22B ... Key (engagement convex part) 31 ... Bearing material 31A ... Engagement flange 31B ... Dividing surface 31C ... Key groove (engaging recess) 32 ... Spectacle band (rest-preventing bearing member)

Claims (10)

[Scope of utility model registration request] 1. A helical auger drilling machine, comprising: a steady rest bearing member for rotatably bundling screw rods of an auger, and a bearing material interposed between the screw rods, wherein both ends are made of hard elastic material. A cylinder provided with an engaging flange is formed into a shape that is bisected in the radial direction, and two position regulating flanges are fitted into the journal portion of the screw rod that is provided at a predetermined interval in the axial direction, and A bearing member for a screw rod in a helical auger boring machine, which is configured to be held so as not to fall off by the steady rest bearing member fitted between the engaging flanges. 2. A helical auger boring machine, comprising a steady rest bearing member for rotatably bundling screw rods of an auger, and a bearing material interposed between the screw rods, which comprises polyurethane and a thermoplastic elastomer. With a hard elastic body selected from the group, it is formed into a shape in which a cylinder having engaging flanges at both ends is divided into two in the radial direction,
Two position regulating flanges are fitted in the journal portion of the screw rod which is provided at a predetermined interval in the axial direction, and are held by the steady rest bearing member fitted between the engaging flanges so as not to fall off. A bearing material for a screw rod in a helical auger drilling machine, which is configured as described above. 3. A helical auger drilling machine, comprising a steady rest bearing member for rotatably bundling screw rods of an auger, and a bearing material interposed between the screw rods, the hardness Shore hardness meter D Type 60-75, tensile strength 3
00kgf / cm ² or more, elongation of 100% or more, a hard elastic member having a Young's modulus of about 2000~3000kgf / cm ^2, is formed in a shape to split the cylinder having an engaging flange at both ends in the radial direction, two Is fitted in the journal portion of the screw rod formed at predetermined intervals in the axial direction, and is held so as not to fall off by the steady rest bearing member fitted between the engaging flanges. Bearing material for screw rod in helical auger drilling machine. 4. A helical auger boring machine, comprising: a steady rest bearing member for rotatably bundling screw rods of an auger, and a bearing material interposed between the screw rods, wherein both ends are made of hard elastic material. A cylinder provided with an engaging flange is formed into a shape that is bisected in the radial direction, and two position regulating flanges are fitted into the journal portion of the screw rod that is provided at a predetermined interval in the axial direction, and It is configured to be held so as not to fall off by the steady rest bearing member fitted between the engaging flanges, and the journal portion of the screw rod has substantially two outer peripheries on opposite side surfaces of the both position regulating flanges. Engagement protrusions are provided at two equally divided portions, and the bearing member has an outer end surface of the engagement flange that is substantially orthogonal to the split surface. Bearing material screw rod in a helical auger boring machine the engaging protrusion along the radial direction, characterized in that the engagement recess to be fitted is formed. 5. A helical auger drilling machine, comprising: a steady rest bearing member for rotatably bundling screw rods of an auger, and a bearing material interposed between the screw rods, wherein both ends are made of hard elastic material. A cylinder provided with an engaging flange is formed into a shape that is bisected in the radial direction, and two position regulating flanges are fitted into the journal portion of the screw rod that is provided at a predetermined interval in the axial direction, and It is configured to be held so as not to fall off by the steady rest bearing member fitted between the engaging flanges, and a plurality of holes are formed in the sliding surface, and these holes are filled with a lubricant. Bearing material for screw rods in helical auger drilling machines. 6. A helical auger drilling machine, comprising: a steady rest bearing member for rotatably bundling screw rods of an auger, and a bearing material interposed between the screw rods, wherein both ends are made of hard elastic material. A cylinder provided with an engaging flange is formed into a shape that is bisected in the radial direction, and two position regulating flanges are fitted into the journal portion of the screw rod that is provided at a predetermined interval in the axial direction, and A screw rod in a helical auger boring machine, characterized in that it is constructed so as to be held so as not to fall off by the steady rest bearing member fitted between the engaging flanges, and a metallic bone member is embedded. Bearing material. 7. A helical auger drilling machine, comprising: a steady rest bearing member for rotatably bundling screw rods of an auger, and a bearing material interposed between the screw rods, wherein both ends are made of hard elastic material. A cylinder provided with an engaging flange is formed into a shape that is bisected in the radial direction, and two position regulating flanges are fitted into the journal portion of the screw rod that is provided at a predetermined interval in the axial direction, and It is configured to be held so as not to fall off by the steady rest bearing member that fits between the engaging flanges, and to be retained on the outer peripheral surface of the position regulating flange of the screw rod and the outer end surface of the engaging flange of the bearing material. Friction between the inner peripheral surface of the bearing material and the outer peripheral surface of the journal portion of the screw rod without providing a convex portion and a concave portion engaging with And one of the outer peripheral surface of the journal portion of the screw rod and the inner peripheral surface of the steady rest bearing member depending on the difference in frictional force between the outer peripheral surface of the bearing material and the inner peripheral surface of the steady rest bearing member. A bearing material for a screw rod in a helical auger drilling machine, which is slidable with respect to. 8. A helical auger boring machine, comprising: a steady rest bearing member for rotatably bundling screw rods of an auger, and a bearing material interposed between the screw rods, wherein both ends are made of hard elastic material. A cylinder provided with an engaging flange is formed into a shape that is bisected in the radial direction, and two position regulating flanges are fitted into the journal portion of the screw rod that is provided at a predetermined interval in the axial direction, and The steady rest bearing member fitted between the engagement flanges is configured to be held so as not to fall off, and the vicinity of an end of the steady rest bearing member facing the engagement flange and the split surface of the bearing material. An engaging projection is formed on either one of the end faces of the engaging flange extending in a substantially orthogonal radial direction, and an engaging recess is formed on the other end, into which the engaging projection fits. Bearing material screw rod in a helical auger boring machine, characterized in that there. 9. A helical auger drilling machine, comprising: a steady rest bearing member for rotatably bundling screw rods of an auger, and a bearing material interposed between the screw rods, wherein both ends are made of hard elastic material. A cylinder provided with an engaging flange is formed into a shape that is bisected in the radial direction, and two position regulating flanges are fitted into the journal portion of the screw rod that is provided at a predetermined interval in the axial direction, and It is configured to be held so as not to fall off by the steady rest bearing member fitted between the engaging flanges, and the journal portion of the screw rod has substantially two outer peripheries on opposite side surfaces of the both position regulating flanges. Engagement protrusions are provided at two equally divided portions, and the bearing member has an outer end surface of the engagement flange that is substantially orthogonal to the split surface. Engagement recesses to which the engagement protrusions are fitted are formed along the radial direction, and steel bands for binding the engagement flanges are provided around the engagement flanges at both ends. Bearing material for screw rod in helical auger drilling machine. 10. A helical auger drilling machine,
A bearing material that is interposed between a steady rest bearing member that rotatably bundles screw rods of an auger and the screw rod, and is formed by a hard elastic body into a shape that divides a cylinder into two in the radial direction. Position regulating flanges are fitted to the journal portion of the screw rod provided at predetermined intervals in the axial direction, and are fixed to the inner peripheral side of the steady rest bearing member to form the lining of the steady rest bearing member. Bearing material for a screw rod in a helical auger drilling machine.