JP3076481B2 - Plumb and stabilizer for plumb bob - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plumb bob used to measure the verticality of columns and walls in wooden buildings and steel structures.

[0002]

2. Description of the Related Art In building construction, it is important to provide horizontal and vertical characteristics. To see the vertical, it is easy to use an inclinometer or a foam-type vertical meter, but in the case of a large building using long columns or steel frames, the above-mentioned instruments have sufficient accuracy. Instead, a plumb bob is commonly used.

FIG. 6 is a schematic view of a conventional swing down.
FIG. 6A is for steel frames, and FIG. 6B is for wood. In the figure, 1 is a down swing, 2 is a down swing, 21 is a down swing attachment, 22 is a thread take-out section, 23 is a magnet, 24 is a driving section, and 25 is a nail.

[0004] The bobbin thread 2 is housed in a bobbin mounter 21 in an automatic winding manner, is taken out from a thread take-out section 22, and the bobbin 1 is attached to the tip thereof. The length D between the end face on the mounting side and the thread take-out portion 22 of the bobbin mounting device 21 is made to have a prescribed size. D values of 5 cm, 10 cm, 15 cm and the like are commercially available.

In use, the plunger 21
Is attached to the upper part of the steel column by magnetic force on the magnet 23 provided on the mounting end face, the down-pulling thread 2 is pulled out, and the down-pull 1 is hung down. The distance between the bobbin string 2 near the bobbin 1 and the steel column was measured,
Correct the collapse of the steel column so that the value of.

In the case of wood, a nail 25 connected to the driving portion 24 is provided so as to protrude from the mounting end surface of the plunger mounting device 21. This plunger mounter 2
1 is hit on a pillar or the like, the driving portion 24 is hit, the nail 25 is driven into the wood, and the plunger 21 is attached.
The usage method for checking the verticality is the same as that for the steel frame described above.

In the above-described down-swing, if the length of the down-swing is increased, the verticality of a high column or the like can be accurately measured. However, there are wind and swinging problems in using the plumb bob. If a strong wind is blowing during the measurement, there is a problem that the bobbin string is bent by the wind. In addition, since the down swing is the same as the pendulum, it swings at a cycle corresponding to the length of the down swing line. If the amplitude of the swing is large, the measurement cannot be performed. Therefore, the measurement is performed after the swing is settled to some extent. The swinging cycle is long when the length of the down swing line is long. As mentioned above,
Since the down bobbin thread is often used with a long length, there is a problem that the swing is difficult to be accommodated, and when the wind hits the bob, the swing is further difficult to be accommodated.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has as its object to provide a down swing that can shorten the time required for the swing to settle.

[0009]

According to a first aspect of the present invention, in a down swing, a base provided with a first hole and a down swing line mounted on the base are passed through. A stabilizing base made of a plate-like body having a second hole smaller than the first hole to be formed, and the down pendulum having a predetermined swing amplitude equal to or more than the second swing amplitude of the down pendulum It is characterized in that the plate-like body is dragged in contact with the hole.

According to a second aspect of the present invention, in the down swing, a plurality of bases each having a first hole and a plurality of holes which are sequentially placed on the base and through which the down bobbin thread is passed are formed. The plurality of plate-like bodies have a stabilizing base that is smaller than the first hole and smaller as the plate-like body placed above the first body; At least the amplitude of the swing, the down bobbin thread contacts at least the hole of the uppermost plate and drags the uppermost plate.

According to a third aspect of the present invention, in the down swing of the first or second aspect, the base has a support means attachable to a pillar or the like.

According to a fourth aspect of the present invention, in the down swing stabilizing base, the first perforated base and the first down stitch mounted on the base and through which the down pendulum is passed. A second plate having a second hole smaller than the hole, wherein the down pendulum contacts the second hole at an amplitude equal to or greater than a predetermined swing amplitude of the down pen string, and It is characterized by being dragged.

According to the fifth aspect of the present invention, in the down swing stabilizing base, the base having the first hole formed therein and the hole through which the down bobbin thread is sequentially placed and passed on the base are provided. It is made up of a plurality of opened plate-like bodies, and the holes of the plurality of plate-like bodies are smaller than the first hole and smaller as the plate-like body placed above, and a predetermined number of At least the amplitude of the swing, the down bobbin thread contacts at least the hole of the uppermost plate and drags the uppermost plate.

According to a sixth aspect of the present invention, in the down-tilt stabilizing platform according to the fourth or fifth aspect, the base has a support means attachable to a pillar or the like. .

[0015]

According to the present invention, a bobbin string is provided on a base having a first hole and a plate-like body having a second hole smaller than the first hole and mounted on the base. As a result, the plate-like body is dragged on the base every time the bobbin string hits the edge of the second hole while the swing amplitude of the bobbin string is larger than the second hole. The friction can apply a load to the down pendulum, and the swing can be rapidly attenuated. Also, when a plurality of plate-like bodies are provided and the hole is made smaller as the upper plate-like body, while the swing is large, the down pendulum drags many plate-like bodies, and the smaller the swing, the smaller the swing. The plate is dragged, and the swing can be attenuated more rapidly. Installation is facilitated by allowing the stabilizer to be attached to a pillar or the like.

[0016]

FIG. 1 is an explanatory view of a first embodiment of a swing down using a stabilizer according to the present invention. FIG. 1 (A) is a schematic configuration diagram of a main part, and FIG. It is sectional drawing of a stand. In the figure, 1
Is a bobber, 2 is a bobbin, 3 is a stable platform, 4 is a base,
5 is a plate, 7 is a pillar, and 8 is a tripod. Plumb 1
The pendulum 2 is attached to the tip of the pendulum 2,
It has been pulled out of the plunger mount as described in FIG. Although the illustration of the plumb bobbin is omitted, it is mounted on the column 7 with a specified dimension D as described with reference to FIG. The stabilizer 3 is composed of a base 4 having a hole, and a plate-shaped body 5 on a disk placed thereon. The holes in the plate 5 are smaller than the holes in the base 4. The stabilizer 3 is supported by any suitable means. In this embodiment, the base 4 has a tripod 8.
Was attached and supported.

The operation will be described. A plumb bobbin attachment is attached to the column 7, the bobbin thread 2 is passed through the hole of the plate-like body 5, and the plumb bob 1 is attached to the tip thereof, and the measurement is performed. Generally, in this state, the down swing 1 rarely comes to rest, and the down swing 1 swings. If the amplitude of the swing is larger than the diameter of the hole in the plate 5, the down pendulum 2 drags the plate 5 after hitting the edge of the hole in the plate 5 and moves. Plate 5
, The frictional force between the lower surface of the plate-like body 5 and the upper surface of the base 4 becomes a load of the down swing 1 and attenuates the swing of the down swing 1. Therefore, the swing of the down swing 1 can be rapidly attenuated as compared with a conventional down swing in which such a load is not applied to the down swing 1. When the down swing 1 is almost stationary, the down swing line 2 is located substantially at the center of the hole of the plate 5, so that the plate 5 does not affect the down swing line 2.

In the above description, the motion of the down swing 1 is described as a one-way swing. However, the down swing 1 may perform a circular motion or an elliptical motion. In the case of such a motion, while the swing amplitude is large, the down pendulum 2 always touches the circle of the hole of the plate-shaped body 5 and drags the plate-shaped body 5. A load can be applied to the swing 1 to attenuate the swing.

The material of the plate 5 may be any suitable material such as a metal or a synthetic resin, and its size and weight can be set as appropriate. When a transparent material is used as the material of the plate-like body 5 and the base 4, the swing 1 can be observed from above. Also,
In order to make the friction coefficient between the upper surface of the base 4 and the lower surface of the plate-like body 5 appropriate, it is also possible to adopt a method of forming a roughened surface or providing a coating material having a large friction coefficient on at least one of the surfaces. .

FIG. 2 is an explanatory view of a second embodiment of the swing down using the stabilizer of the present invention. FIG. 1 (A) is a schematic structural view of a main part, and FIG. 1 (B) is a stabilizer. FIG. In the figure,
The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted. Reference numeral 6 denotes a plate-like body. In this embodiment, two plate members of the stabilizer 3 are used. As can be seen from FIG. 2 (B), the holes in the upper plate 6 are smaller than the holes in the lower plate 5. As for the size of the plate-like body, the diameter of the plate-like body 6 is shown to be smaller than the diameter of the plate-like body 5, but it is not always necessary. This is because the size and weight of the plate may be appropriately selected.

In this embodiment, when the amplitude of the swing of the pendulum 2 is larger than the diameter of the hole of the plate 5, the pendulum 2 hits the edge of the hole of the plate 5. Moves by dragging the plate 5 and the plate 6 together. Further, in a state where the amplitude of the swing is smaller than the diameter of the hole of the plate-like body 5, after the bobbin string 2 hits the edge of the hole of the plate-like body 6, only the plate-like body 6 is dragged. Move. Therefore, when the swing amplitude of the down swing 1 is large, the load is large, and when the swing amplitude of the down swing 1 is small, the load can be reduced. When the amplitude of the pendulum 2 is smaller than the hole of the plate 6, the plates 5, 6 do not affect the pendulum 2.

FIG. 3 is a schematic structural view of a main part of a third embodiment of a swing down using a stabilizer according to the present invention. In the figure, FIG.
The same reference numerals are given to the same parts as those described above, and the description is omitted. 9
Is a transparent case. The transparent case 9 is cylindrical,
It is used as a support for the stabilizer 3, and the upper surface is a base 4. Since the plunger 1 is surrounded by the transparent case 9, the wind of the plunger 1 is protected.

FIG. 4A is a schematic structural view of a main part of a fourth embodiment of the down swing using the stabilizer according to the present invention. In the figure, the same parts as those in FIG. 10 is a support, 10a is an introduction groove, 10b is a hole, 1
1 is a tripod, and 12 is an obstacle. The support base 10 is attached to a tripod 11 near one end thereof and extends sideways. The other end of the support base 10 is, as shown in the plan view of FIG.
Is formed, and a hole 10b is formed so that the plate-shaped body 5 is located on the introduction groove 10a. Even if there is an obstacle 12 in the vicinity of the hanging down 1, the stabilizer 3 can be installed at a desired position. In this embodiment, a part of the support 10 also serves as a base. However, the support may be provided separately and supported by the support 10.

FIG. 5 is a schematic structural view of a supporting means in another embodiment of the stabilizer according to the present invention. In the figure, 13 is a base,
13a is an introduction groove, 13b is a hole, 14 is a mounting surface, 15
Is a magnet, and 16a, 16b, 17a, and 17b are reference lines. The base 13 may have any shape, but in this embodiment, the magnet 15 is provided with the end face of the base 13 as the mounting surface 14. The use of the magnet in the plunger for a steel frame has been described with reference to FIG. 6. However, by providing the magnet 15 on the base 13 of the stabilizer, the stabilizer can be easily attached to the steel frame. Above, it is convenient. An introduction groove 13a and a hole 13b are provided on the upper surface of the base 13 in the same manner as described with reference to FIG. The introduction groove is formed by the reference lines 16a, 16b, 17a, 17b.
It is formed in a position to avoid. Also, the reference lines 16a,
16b is parallel to the mounting surface 14, and the reference lines 17a, 17
b is provided at right angles to the mounting surface. The distance between the reference lines 16a, 16b and the mounting surface 14 is equal to the prescribed dimension D described in FIG. Reference lines 17a, 17b
Is preferably provided in the middle of the upper surface.

For use in wooden construction, a nail as described with reference to FIG. 6B can be used instead of a magnet. Both a magnet and a nail may be provided. Further, the reference line is not specific to this embodiment, and can be applied to each of the above-described embodiments.

[0026]

As is apparent from the above description, according to the present invention, the time required to settle down the swing can be shortened, so that the working time can be shortened.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a first embodiment of a swing down using a stabilizer according to the present invention. FIG. 1 (A) is a schematic configuration diagram of a main part, and FIG. 1 (B) is a cross-sectional view of the stabilizer. It is.

FIGS. 2A and 2B are explanatory diagrams of a second embodiment of the swing down using the stabilizer according to the present invention. FIG. 1A is a schematic configuration diagram of a main part, and FIG. 1B is a cross-sectional view of the stabilizer. It is.

FIG. 3 is a schematic configuration diagram of a main part of a third embodiment of a down swing using a stabilizer according to the present invention.

FIG. 4 is a schematic configuration diagram of a main part of a fourth embodiment of a swing down using a stabilizer according to the present invention.

FIG. 5 is a schematic structural view of a support means in another embodiment of the stabilizer according to the present invention.

FIG. 6 is a schematic view of a conventional down swing, in which FIG. 6 (A) is for steel frames and FIG. 6 (B) is for wood.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plumb 2 Plumb 3 Stable 4 Base 5 6 Plate 7 Pillar 8 11 Tripod 9 Transparent case 10 Support 12 Obstacle 13 Base 14 Mounting surface 15 Magnet 16a, 16b, 17a, 17b Reference line

Claims (6)

(57) [Claims] 1. A base having a first hole and a plate-like body having a second hole smaller than the first hole which is placed on the base and through which a down pendulum is passed. Wherein the lower pendulum is in contact with the second hole and drags the plate-like body when the lower pendulum has a predetermined swing amplitude or more. . 2. A base having a first hole formed therein, and a plurality of plate-like bodies which are sequentially placed on the base and have holes formed therein through which a down pendulum is passed. The hole in the body has a stabilizer that is smaller than the first hole and smaller as the plate-shaped body placed above, and the lower pendulum has a predetermined swing amplitude equal to or greater than the predetermined swing amplitude of the lower pendulum. A plunger characterized in that at least the uppermost plate is brought into contact with a hole of the uppermost plate and dragged. 3. The swing according to claim 1, wherein the base has support means that can be attached to a pillar or the like. 4. A base having a first hole formed therein, and a plate-like body having a second hole smaller than the first hole placed on the base and through which a down pendulum is passed. Characterized in that the lower pendulum is in contact with the second hole and drags the plate-like body at a predetermined swing amplitude or more of the lower pendulum. . 5. A base having a first hole formed therein, and a plurality of plate-like bodies which are sequentially placed on the base and have holes formed therein through which a down pendulum is passed, wherein the plurality of plates are provided. The hole of the plate-shaped body is smaller than the first hole and smaller as the plate-shaped body placed above, and the lower pendulum is at least uppermost at a predetermined swing amplitude or more of the lower pendulum. A stabilizing platform for swinging down, wherein the uppermost plate is dragged by contacting a hole of the plate. 6. The stabilizing base for swinging down according to claim 4, wherein the base has a support means attachable to a pillar or the like.