JP3124887U - Screw point attaching / detaching tool - Google Patents

Abstract

The present invention provides a screw point attaching / detaching tool capable of safely and efficiently attaching / detaching a screw point from a rod and adding convenience of gauge determination and the like.
A blade portion support receiving portion having a through hole formed by molding a blade portion H of a screw point S, a rod receiving portion 12 receiving a connecting rod R screwed to the screw point, The screw point attaching / detaching tool 10 is constituted by the base portion 13 on which the blade portion support receiving portion 11 and the rod receiving portion 12 are arranged to face each other.
[Selection] Figure 1

Description

  The present invention relates to a screw point attaching / detaching tool for attaching / detaching a screw point used to measure soil quality by inserting it into the ground.

Conventionally, methods such as a Swedish sounding test have been generally used to investigate the soil strength of a land prior to construction of a building. In this test method, a load and rotation are added to a drill-like screw point made of chrome molybdenum steel, etc., and it is penetrated into the ground. The geological structure of is determined.
A screw portion is formed at the base portion of such a screw point, the screw portion of the connecting rod is screwed to the screw portion, both are connected, and the entire length is set by adding another rod or the like.
After the measurement by the screw point is completed, the added rod is removed while the rod is pulled out from the ground, and finally the screw connecting rod and the screw point are removed using a tool such as a pipe wrench or a spanner.
Japanese Patent Application Laid-Open No. 2004-232212

However, when attaching / detaching the connecting rod to / from the screw point using the tool as described above, it is necessary to strongly fix and grip a part of the blade portion of the screw point with the tool, which may damage the blade portion. there were.
There is also a problem that when the rod is gripped with a tool such as a spanner, the screw point is stably fixed and the work cannot be performed. For this reason, the attaching / detaching operation of the screw point has to be performed carefully, so that the working efficiency is poor, and there is a problem that the removing operation is dangerous.
The present invention has been made to solve the above-described conventional problems. When the connecting rod is attached to and detached from the screw point, it can be stably held without damaging the blade portion, and the attaching and detaching work can be efficiently performed. Another object of the present invention is to provide a screw point attaching / detaching tool that can be added with the convenience of gauge determination of screw points.

(1) The present invention is a screw point attaching / detaching tool for attaching / detaching a connecting rod screwed to a base end portion of a screw point penetrating into the ground for ground investigation, A blade portion support receiving portion having a substantially helical wall through-hole formed by molding the blade portion of the screw point and having the screw point tip portion inserted and fixed thereto, and screwed to the base end portion of the screw point The rod receiving portion formed in a substantially U shape for receiving the connecting rod, the blade portion supporting receiving portion and the rod receiving portion are arranged to face each other with a predetermined interval, and the back side thereof is placed on the base surface. And a substantially rectangular plate-shaped base portion.

(2) The screw point attaching / detaching tool of the present invention is the above-described (1), wherein the base portion is composed of two front and back rectangular plates that can be opened and closed via a rotation shaft. It also has a feature in that a locking portion for fixing the opening / closing angle of the plate at a predetermined position is provided.

(3) The screw point attaching / detaching tool of the present invention is the gauge part for checking the diameter of the screw point inserted and inserted on the surface side of the base part through a hinge in the above (1) or (2). It has the characteristic also in having.

(4) The screw point attaching / detaching tool according to the present invention is characterized in that, in the above (1) to (3), the base portion is provided with a handle portion for gripping during screw point attaching / detaching work. is doing.

  According to the screw point attaching / detaching tool of the present invention, the tip end of the screw point is inserted and fixed to the blade support receiving portion formed by molding the blade portion of the screw point, and screwed to the base end portion of the screw point. Since the connected connecting rod can be stably supported by the rod receiving portion, the attaching / detaching operation can be efficiently performed without damaging the blade portion of the screw point.

  The screw point attaching / detaching tool of this embodiment is for receiving a blade portion support receiving portion having a through hole into which a blade portion of a screw point is inserted, and a shaft portion of a connecting rod screwed to the screw point. A rod receiving portion, and a blade portion supporting receiving portion and the rod receiving portion are opposed to each other with a predetermined interval, and a substantially rectangular plate-like base portion on which the back side is placed on the base surface Composed. As a result, when the connecting rod is attached to and detached from the screw point, the blade portion is fixed by a through-hole that is in close contact with the blade portion in a wide range, and the base end side is not damaged while the blade portion is damaged. The whole can be stably held without wobbling, and the attaching / detaching operation can be performed efficiently and reliably.

  The screw point is made of a cemented carbide such as chromium molybdenum steel, manufactured according to JIS standards, and formed in a drill shape with a sharp tip. On the base end surface of the screw point, a male screw protrudes and is integrally formed, and is configured to be screwed into a female screw of a rod so as to be connected to each other. Although the bending moment acts on the screw point by contact with the rock, etc., the screw part where stress tends to concentrate can be composed of a male screw member such as a stud bolt manufactured as a dedicated screw, screw point and rod The strength of the connecting portion can be further increased. As a result, it is possible to prevent breakage at the screw point connection portion not only when the bending moment acts but also when a torsional moment or the like during rotation penetration acts. In this embodiment, a male screw is formed at the screw point, and the rod is connected to this via a female screw member. However, a fitting hole having a female screw is formed at the base end of the screw point, and the rod It is also possible to engage with the male threaded portion of this, and the effect obtained is the same.

  The blade portion support receiving portion is a substantially rectangular parallelepiped member formed by pre-molding from a screw point formed in a screw shape with a molten metal such as aluminum. Such a screw point mold can be manufactured by the lost wax method or the like. In addition, the through-hole of the blade part support receiving part by which a screw point is hold | maintained is arrange | positioned so that the front-end | tip part may be exposed about 1-3 cm when a screw point is inserted. Thus, by hitting the exposed portion at the tip of the screw point with a hammer or the like, the screw point in a state of being bitten in the through hole can be easily removed from the blade portion support receiving portion.

  The rod receiving portion is a member for supporting the shaft portion of the connecting rod screwed to the base end of the screw point. The tip end side of the screw point is inserted into and supported by the blade portion support receiving portion. For example, the rod receiving portion is formed by cutting out an upper portion of a rectangular plate or the like into a U shape.

  The base portion is a substantially rectangular plate-shaped metal member made of steel, stainless steel, or the like, and the blade portion support receiving portion and the rod receiving portion are arranged to face each other with a predetermined interval, for example, an interval of about 5 to 50 cm. The back side is placed on the base surface.

  The screw point attaching / detaching tool according to the present embodiment is composed of two front and back rectangular plates in which the base portion is opened and closed via a rotation shaft, and the opening and closing angles of the two front and rear rectangular plates are set at predetermined positions. A locking portion to be fixed can be provided. As a result, when the screw point and the connecting rod are removed, the front and back rectangular plates can be stably placed by spreading them to positions orthogonal to each other and placed on the ground surface or the like. Therefore, work efficiency can be improved and safety can be improved. Furthermore, since the two rectangular plates on the front and back can be made compact when not in operation, a screw point attaching / detaching tool excellent in portability and storage can be provided.

  The locking portion is a stopper having bolts and hooks for fixing the opening and closing angles of the two front and back rectangular plates at a predetermined position, and the opening and closing angles of the rectangular plates stacked so as to be opened and closed are orthogonal to each other. It has a function of fixing to a working position, a storage position stacked on each other, or the like.

  The screw point attaching / detaching tool of the present embodiment can also have a gauge portion for checking the diameter of the screw point inserted and inserted on the surface side of the base portion via a hinge. As a result, the degree of wear and damage before and after the use of the screw point can be constantly checked when the screw point is attached and detached, so that the reliability in the ground investigation can be further increased.

  In the screw point attaching / detaching tool of the present embodiment, the base portion may be provided with a handle portion for gripping during screw point attaching / detaching work. Thus, the base portion can be securely held during the operation, and the screw point can be detached from the connecting rod safely and efficiently.

FIG. 1 is a perspective view of a screw point attaching / detaching tool according to the present embodiment, and FIG. 2 is an explanatory diagram of a method of using the screw point attaching / detaching tool. The screw point attaching / detaching tool of this embodiment will be described below with reference to the drawings. In the screw point attaching / detaching tool 10 according to the first embodiment shown in FIGS. 1 and 2, the blade portion support receiving portion 11 having a through hole 11 a into which the blade portion H of the screw point S is inserted, and screwed into the screw point S. A rod receiving portion 12 for receiving the shaft portion of the connected connecting rod R, and a base portion 13 that arranges the blade portion supporting receiving portion 11 and the rod receiving portion 12 so as to face each other with a predetermined interval.
The base portion 13 has two rectangular plates 13a and 13b, which are overlapped so as to be openable and closable via a rotating shaft 13a, and screw points that are attached and inserted on the front side of the base plate 13 via a hinge 14a. The gauge part 14 provided with the regulation hole 14b for checking the diameter of S is provided. Furthermore, the handle | steering-wheel part 15 is attached to the upper part of the blade part support receiving part 11, and the handle | steering-wheel part 15 for hold | griping at the time of work etc. is provided.

  The screw point S is a drill shape made of chromium molybdenum steel (SCM), and functions as a resistor for evaluating the geology. The base portion of the screw point S is formed with a male screw portion and is screwed into the female screw portion of the connecting rod R. The main body portion of the screw point S is required to have high hardness and wear resistance so that it can withstand earth and sand wear when penetrating into the ground, and is preferably subjected to heat treatment for obtaining these characteristics.

  The base portion 13 of the screw point attaching / detaching tool 10 is composed of two rectangular plates 13b and 13c on the front and back sides, and is in a state orthogonal to each other from the superimposed state (FIG. 1 (a)) with the rotating shaft 13a as an axis. It can be opened and closed as shown in FIG. Further, the rectangular plate 13c is provided with a locking portion 13d formed by bending its end portion into an L shape, and the rectangular plates 13b and 13c are restricted from being opened and closed, so that both may be inadvertently shifted. Arranged not to.

  Note that a bolt screw 13e is attached to the locking portion 13d for pressing its tip toward the blade portion support receiving portion 11 side. The locking portion 13d can be provided so as to fix the rectangular plates 13b and 13c to each other at an orthogonal position in FIG.

  The gauge portion 14 is attached to the surface side of the rectangular plate 13b of the base portion 13 via a hinge 14a. And when determining whether the screw point S is worn out and the diameter is not less than a specific dimension, as shown in FIG. By inserting a screw point S into a defined hole 14b formed to a defined hole diameter, for example, φ30 mm, the suitability of the diameter can be checked at any time.

  FIG. 3 is a schematic explanatory view of an operation procedure for removing the connecting rod R from the screw point S using the screw point attaching / detaching tool 10 described above. The removal procedure will be described below with reference to the drawings. In FIG. 3, the configuration of the locking portion 13d, the handle portion 15, and the like is omitted for convenience of description.

First, a ground measuring tool in which the screw point S pulled out from the ground after ground measurement and the joining rod R are screwed is inserted into the through hole 11a of the screw point attaching / detaching tool 10 from the tip (FIG. 3A).
Prior to this work, as shown in FIG. 1 (b), the gauge portion 14 is raised, and the tip portion of the screw point S worn by ground investigation is inserted into the specified hole 14b, and the degree of wear. Can be determined. At this time, characters such as “screw point measurement” and “φ30 mm or more confirmation” are engraved and colored on the front side surface of the base portion 13 so that photo management at the time of screw point measurement can be easily performed.

  Thus, while twisting the screw point S, the tip of the through hole 11a protrudes about 1 to 3 cm, and the shaft portion on the rear end side of the connecting rod R is put on the U-shaped recess 12a of the rod receiving portion 12. Support (FIG. 3B). As a result, the blade portion H of the screw point S is held and fixed by the through hole 11a.

Next, the shaft portion of the connecting rod R is clamped by a tool K such as a pipe wrench, and the screw point S and the threaded portion N of the connecting rod R are rotated (FIG. 3C). As a result, the connecting rod R is detached from the threaded portion N of the screw point S (FIG. 3D).
When a force is applied to grab the shaft of the pipe wrench that holds the connecting rod R and rotate it downward, the main body of the base portion 13 is twisted and its one side tends to lift. In order to prevent this, the rectangular plates 13b and 13c of the base portion 13 can be rotated and expanded so as to be orthogonal to each other, thereby functioning as an anchor for stabilizing the whole. In the state where the rectangular plates 13b and 13c are overlapped, since both are fixed by the bolt screw 13e of the locking portion 13d, after loosening the bolt screw 13e, the rotating shaft 13a is pivoted. I try to rotate as.

  After removing the connecting rod R from the rod receiving portion 12, by hitting the screw point S having its tip looked through the through hole 11a with a tool such as a hammer, the through hole 11a is formed as shown in FIG. The blade portion H of the screw point S that has been bitten is detached and released.

  Finally, the screw point S and the joining rod R can be removed from the screw point attaching / detaching tool 10 to prepare for the next attaching / detaching operation (FIG. 3F).

  As described above, the screw point attaching / detaching tool 10 of the present invention inserts and fixes the screw point S to the blade portion support receiving portion 11 formed by shaping the blade portion H of the screw point S, and the screw point S. The connecting rod R screwed to the base end of the rod is stabilized by the rod receiving portion 12 so that the attaching / detaching operation can be performed without damaging the blade portion H. Things belong to the scope of rights of the present invention.

It is a perspective view of the tool for screw point attachment / detachment. It is use explanatory drawing of the tool for screw point attachment / detachment. It is a schematic explanatory drawing of the operation | work procedure which removes a connecting rod from a screw point.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Screw point attaching / detaching tool of Example 11 Blade part support receiving part 11a Through hole 12 Rod receiving part 13 Base part 13a Rotating shaft 13b, 13c Rectangular plate 13d Locking part 13e Bolt screw 14 Gauge part 14a Hinge 14b Specified hole 15 Handle Part S Screw point H Blade part R Connecting rod N Screw part

Claims (4)

A screw point attaching / detaching tool for attaching / detaching a connecting rod screwed to a base end portion of a screw point penetrating into the ground for ground investigation,
A blade portion support receiving portion into which a screw point tip portion is inserted and fixed, having a through-hole in a substantially spiral wall surface formed by molding the blade portion of the screw point;
A rod receiving portion formed in a substantially U shape for receiving the connecting rod screwed to the proximal end portion of the screw point;
A screw point, characterized in that the blade support receiving part and the rod receiving part are arranged to face each other with a predetermined interval, and a back surface side of the base part is placed on a base surface. Detachable tool. The base part is composed of two front and back rectangular plates that can be opened and closed via a rotating shaft, and a locking portion is provided for fixing the opening and closing angles of the two front and back rectangular plates at a predetermined position. The screw point attaching / detaching tool according to claim 1. 3. The screw point attaching / detaching tool according to claim 1 or 2, further comprising a gauge portion for checking a diameter of a screw point that is inserted on a surface side of the base portion via a hinge and is inserted in a standing manner. . The screw point attaching / detaching tool according to any one of claims 1 to 3, wherein the base part is provided with a handle part for holding the screw point attaching / detaching operation.

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