JP2011226115A - Lock bolt and pressure receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock bolt which enhances transmissibility of a tension of a bolt to a pressure receiver.SOLUTION: A lock bolt 100 includes a bolt 10, a nut 20 attached to the bolt 10, and a pressure receiver 30 for receiving the nut 20 having an insertion hole 30a through which the bolt 10 is inserted. The pressure receiver 30 has a nut receptacle 32 which receives the nut 20. The nut receptacle 32 is provided with protrusions 34 which are in contact with the nut 20. The protrusions 34 have a dot or strip shape. The nut receptacle 32 may be curved to the side where the nut 20 is provided or to the side opposite to the side where the nut is provided.

Description

  The present invention relates to a rock bolt and a pressure receiving body for stabilizing soil.

  In order to stabilize the soil, a technique for fixing a rock bolt has been proposed (Japanese Patent Laid-Open No. 2002-230867). The lock bolt inserts a bolt into a support plate, screws a nut onto the bolt, and transmits the tension of the bolt to the support plate through the nut.

JP 2000-145743 A

  An object of the present invention is to provide a lock bolt having an increased transmission degree for transmitting the tension of the bolt to the pressure receiving body.

  Another object of the present invention is to provide a pressure receiving body that can easily transmit the tension of a bolt.

1. The lock bolt of the present invention is
Bolts,
A nut attached to the bolt;
An insertion hole for passing the bolt, and a pressure receiving body for receiving the nut,
The pressure receiving body has a nut receiving portion for receiving the nut,
The nut receiving portion is provided with a protruding portion that comes into contact with the nut.

  In the present invention, the nut receiving portion is provided with a protrusion that contacts the nut. The presence of the protrusion can increase the degree of contact between the nut and the nut receiver, that is, the degree of fitting, and the degree of transmission of transmitting the tension of the bolt to the pressure receiving body.

  In the present invention, the protrusions can be strip-shaped or dot-shaped.

  When the nut makes point contact or line contact with the protrusion, the nut comes into firm contact with the pressure receiving body as compared with surface contact, and the tension can be transmitted to the pressure receiving body more effectively. There is also an advantage that the nut is not easily loosened.

  In the present invention, the nut receiving portion may be curved toward the side where the nut is provided. Thereby, the intensity | strength of a nut receiving part can be raised.

  In the present invention, the nut receiving portion may be curved on the side opposite to the side on which the nut is provided. Thereby, the intensity | strength of a nut receiving part can be raised. Moreover, the protrusion part to the ground of a volt | bolt can be shortened.

  In the present invention, the protruding portion may be provided so as to extend in a radial direction of the receiving portion. Thereby, a projection part will show | play the function as a rib and the intensity | strength of a nut receiving part can be improved.

  In the present invention, the projecting portion may be provided so as to extend in a circumferential direction of the receiving portion. Thereby, a projection part will show | play the function as a rib and the intensity | strength of a nut receiving part can be improved. Further, this protrusion can prevent water from entering.

  In the present invention, the nut may have a shape in which a portion that receives the pressure receiving body is curved. Thereby, the close_contact | adherence degree to the nut receiving part of a nut can be raised.

  In the present invention, a flow path for passing water may be provided on the lower surface of the pressure receiving body. Thereby, when the lock bolt is laid on the ground, water can be prevented from entering the excavation hole in which the bolt is stored.

  In this invention, the water penetration prevention part which prevents that water penetrate | invades into the said insertion hole can be provided around the receiving part of the said nut of the said pressure receiving body. Thereby, it is possible to prevent water from entering the nut receiving portion.

2. Pressure receiving body The pressure receiving body of the present invention is a lock bolt including a bolt and a nut, and is a pressure receiving body for contacting the nut when the nut is attached to the bolt and transmitting a tensile force of the bolt to the ground. And a nut receiving portion that receives the nut, and the nut receiving portion is provided with a protrusion that contacts the nut.

  The pressure receiving body of the present invention is preferably used for the lock bolt of the present invention. That is, according to the pressure receiving body of the present invention, when the nut is tightened, the contact degree between the nut and the nut receiving portion can be increased, and the transmission degree of the bolt tension to the pressure receiving body can be increased.

  In the present invention, the protrusions may be strip-shaped or dot-shaped.

  In the present invention, the protrusions can be strip-shaped or dot-shaped.

  When the nut makes point contact or line contact with the protrusion, the nut comes into firm contact with the pressure receiving body as compared with surface contact, and the tension can be transmitted to the pressure receiving body more effectively. There is also an advantage that the nut is not easily loosened.

  In the present invention, the nut receiving portion may be curved toward the side where the nut is provided. Thereby, the intensity | strength of a nut receiving part can be raised.

  In the present invention, the nut receiving portion may be curved on the side opposite to the side on which the nut is provided. Thereby, the intensity | strength of a nut receiving part can be raised.

It is a perspective view which shows a lock bolt typically. It is a figure which shows the cross section of a rock bolt typically. It is a disassembled perspective view of a lock bolt. It is a figure showing other examples of a lock bolt typically. It is a figure which shows typically the cross section of the lock bolt of FIG. It is a disassembled perspective view of the lock bolt of FIG. It is a figure which shows a pressure receiving body typically. It is a figure which shows a pressure receiving body typically. It is a figure which shows a pressure receiving body typically. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the other example of a pressure receiving body. It is a figure which shows typically the lower surface of a pressure receiving body. It is a figure which shows a nut typically. It is a figure which shows a nut typically. It is a figure which shows a coupler typically. It is a figure which shows a coupler typically. It is a figure which shows a coupler typically. It is a figure which shows typically the construction example of a rock bolt.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1. Configuration of Lock Bolt The lock bolt 100 includes a bolt 10, a nut 20 attached to the bolt 10, and a pressure receiving body 30.

  The pressure receiving body 30 is for distributing and transmitting the tensile force of the bolt 10 transmitted through the nut 20 to the ground. The pressure receiving body 30 has an insertion hole 30a for passing the bolt 10 and a nut receiving portion 32 for receiving the nut 20 around the insertion hole 30a. The nut receiving portion 32 is provided with a protruding portion 34 that comes into contact with the nut 20 and has an uneven surface.

  As shown in FIGS. 1 to 3, the nut receiver 32 can be bent toward the side where the nut 20 is provided. Moreover, as shown in FIGS. 4-6, the nut receiving part 32 may be curved on the opposite side to the side where the nut 20 is provided.

  The protrusion 34 can be configured by a belt-like or dot-like protrusion that can make a line or point contact with the nut 20, for example. The projection 34 may be provided so as to extend in the radial direction of the nut receiver 32 as shown in FIGS. 8 to 12, or the nut receiver 32 as shown in FIGS. 13 to 18. It may be provided so as to extend in the circumferential direction, or both modes may be included as shown in FIGS. The shape of the protrusion 32 may be spiral as shown in FIGS. As shown in FIGS. 28 to 30, the pressure receiving body 30 may be separable from the nut receiving portion 32.

  When the nut receiving portion 32 is bent to the side opposite to the side where the nut 20 is provided, as shown in FIGS. 16 and 25, water is inserted into the insertion hole 30 a around the nut receiving portion 32 of the pressure receiving body 20. It is possible to provide a water intrusion prevention unit (water intrusion prevention piece) 36 that prevents water from entering.

  As shown in FIG. 31, a flow path 38 for passing water can be provided on the lower surface of the pressure receiving body 30. For example, after the lock bolt 100 is installed, the water flowing from the upper side can be smoothly flowed downward by the flow path 38.

  As shown in FIGS. 32 and 33, the nut 20 may cover the bolt 10 inserted through the nut 20. That is, the nut 20 and the cap can be provided integrally.

  As a method of attaching the nut 20 to the bolt 10, a female screw provided in the nut 20 may be provided, and a screw groove may be provided in the bolt 10 to be screwed. As the material of the bolt 10, a known material can be applied, and for example, it can be made of a PC steel rod. A resin for preventing corrosion may be provided on the surface of the bolt. This resin can be made of a silicone-based material.

  Further, a sheath tube 12 for protecting the bolt 10 may be provided. Since the sheath tube 12 has a shape corresponding to the curvature of the nut receiving portion 32 of the pressure receiving body 30, the pressure is dispersed and the burden on the pressure receiving body 30 can be reduced. In order to secure the length of the bolt 10, a plurality of bolts 10 may be connected through a coupler 40 as shown in FIGS. 34 to 36. The coupler 40 may be configured by providing a through hole in the longitudinal direction and providing a female screw in the through hole.

  As shown in FIG. 37, a spacer 42 may be provided around the bolt 10 from the viewpoint of securing the space between the bolt 10 and the ground hole.

2. Usage Method The lock bolt 100 is used as follows, for example. As shown in FIG. 37, a hole 52 is provided in the ground, and the bolt 10 is inserted into the hole 52. Next, the bolt 10 is inserted from the insertion hole 30a of the pressure receiving body 30, and the pressure receiving body 30 is installed so as to face the surface of the ground. Next, the nut 20 is attached to the bolt 10 and tightened, whereby the tensile force of the bolt 10 is transmitted to the ground through the pressure receiving body 30.

3. Operational Effects Hereinafter, the operational effects according to the present embodiment will be described.
(1) When the nut 20 is in point contact or line contact with the protrusion 34, the nut 20 is firmly in contact with the pressure receiving body 30 as compared with surface contact, and the tension is more effective on the pressure receiving body 30. Can be transmitted. There is also an advantage that the nut 20 is not easily loosened.
(2) When the protrusion 34 extending in the radial direction of the nut receiving portion 32 exists, the nut 20 is satisfactorily seated. That is, when the nut receiving portion is curved and there is no protrusion, the nut 20 comes into surface contact with the nut receiving portion, and the nut 20 is likely to rattle. However, the presence of the protrusion 34 hardly causes rattling.
(3) When the protrusion 34 extending in the circumferential direction exists, water can be prevented from entering the insertion hole 30a.
(4) When the protrusion 34 extending in the radial direction of the nut receiver 32 or the protrusion 34 extending in the circumferential direction is present, the nut receiver 32 functions as a reinforcing part. The strength of 34 can be increased.
(5) When the nut receiving part is curved, there is a disadvantage that it is difficult to manufacture the pressure receiving body 30 with a casting. This is because a casting made of a casting has a cast surface on its surface, which causes roughness. For this reason, after forming a pressure-receiving body with casting, it is necessary to make the surface smooth by polishing or the like, which increases the number of processing steps. However, according to this embodiment, the projecting portion 34 and the nut 20 are in point contact or line contact, and processing such as surface processing is unnecessary even after the pressure receiving body 30 is manufactured by casting, It is possible to solve the contradictory problem of making a casting without increasing the number of processing steps.
(6) The strength of the pressure receiving body 30 can be improved by bending the nut receiving portion 32.
(7) When the pressure receiving body 30 is curved on the side opposite to the nut, the swing width of the bolt 10 can be increased when the bolt 10 is fixed. Moreover, the protrusion part to the ground of a volt | bolt can be shortened.

  The present embodiment can be variously modified within the scope of the present invention.

  The rock bolt of the present invention is widely applied to industries such as construction or civil engineering as a member for stabilizing the ground.

10 Bolt 12 Saya tube 20 Nut 30 Plate 30a Insertion hole 32 Nut receiving part 34 Projection part 36 Water inflow prevention piece 38 Channel 40 Coupler 42 Spacer 100 Lock bolt

Claims (14)

Bolts,
A nut attached to the bolt;
An insertion hole for passing the bolt, and a pressure receiving body for receiving the nut,
The pressure receiving body has a nut receiving portion for receiving the nut,
A lock bolt in which the nut receiving portion is provided with a protrusion that contacts the nut. In claim 1,
The protrusion is a lock bolt having a band shape or a dot shape. In claim 1 or 2,
The nut receiving portion is a lock bolt that is curved toward the side where the nut is provided. In claim 1 or 2,
The nut receiving portion is a lock bolt that is curved to the side opposite to the side on which the nut is provided. In any one of Claims 1-4,
The protrusion is a lock bolt provided so as to extend in a radial direction of the receiving portion. In any one of Claims 1-5,
The protrusion is a lock bolt provided so as to extend in a circumferential direction of the receiving portion. In any one of Claims 1-6,
The nut is a lock bolt having a shape in which a portion for receiving the pressure receiving body is curved. In any one of Claims 1-7,
A lock bolt provided with a flow path for passing water through the lower surface of the pressure receiving body. In any one of Claims 1-8,
A lock bolt in which a water intrusion preventing portion is provided around the nut receiving portion of the pressure receiving body to prevent water from entering the insertion hole. In any one of Claims 1-9,
A lock bolt in which the cap and the nut are provided integrally. A lock bolt including a bolt and a nut, a pressure receiving body for contacting the nut when the nut is attached to the bolt and transmitting a tensile force of the bolt to the ground,
A nut receiver for receiving the nut;
The pressure receiving body, wherein the nut receiving portion is provided with a protrusion that contacts the nut. In claim 11,
The protrusion is a pressure receiving body having a band shape or a dot shape. In claim 11 or 12,
The nut receiving portion is a pressure receiving body that is curved toward the side where the nut is provided. In claim 11 or 12,
The nut receiving portion is a pressure receiving body that is curved on the side opposite to the side on which the nut is provided.

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