JPH0750662Y2 - Plumb bob - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plumb bob used for checking the verticality of a structure or for marking a point on a vertical line on the structure.

[0002]

2. Description of the Related Art Conventionally, a plumb bob is known in which a plumb bob is suspended in a cylinder with a thread, and the tip of the plumb bob is aligned with the center of the scale at the lower end to measure the verticality of a structure. (See, for example, Japanese Utility Model Publication No. 53-51179).

[0003]

In order to improve the usability of this type of plumb bob, it is necessary to quickly stop the swing of the weight and prevent rattling of the weight during transfer. Further, there is a demand for fine adjustment of the height of the weight so that the shake of the weight can be easily seen. Further, in the conventional one, the worker is forced to stand and squat many times in order to confirm the position of the tip of the weight, and the workability is not good.

Therefore, the present invention should solve the problem of providing a plumb bob which facilitates fine adjustment and fixing of the height of the weight and allows the operator to know the inclination of the outer cylinder while standing. This is a technical issue.

[0005]

[Means for Solving the Problems] In order to solve the above problems, the following plumb bob was created. That is, according to the present invention, an outer cylinder which has a window hole formed at its lower end and stands upright, an inner cylinder slidably inserted in the outer cylinder in the axial direction, and an outer cylinder having an appropriate length protruding from the upper end of the outer cylinder. In a plumb bob having a stopper for fixing the inner cylinder to the outer cylinder and a weight suspended by a thread at a position facing the window hole, a thread hooking portion is provided at an upper end of the inner cylinder. The thread is hung on the thread hooking portion so that both ends of the thread hang down, and the weight is attached to one end of the thread, and a balancer having substantially the same mass as the weight is attached to the other end. . In addition, a center plate which penetrates the window hole and which shows a swinging condition of the weight by the protruding length from the window hole is attached to the weight, and the tip of the weight can be fitted to the outer cylinder. It is characterized in that a bottom plate having a hole is attached so as to be able to move up and down, and a fixture for fixing the bottom plate to the outer cylinder is provided.

[0006]

Function: The inner cylinder is slid in the outer cylinder, and the plumb bob is set to a desired length for use. At this time, since the balance between the weight and the balancer is always maintained, when the weight is moved up and down, the thread slides at the thread hooking portion, and the height of the weight can be freely adjusted. Then, since the deflection plate projects from the window hole in accordance with the inclination of the outer cylinder, the operator can support the plumb bob in a substantially vertical state in a standing posture by looking at it. Further, at the time of transfer, the bottom plate can be pushed up to fit the tip of the weight into the center hole of the bottom plate, and then the bottom plate can be fixed to the outer cylinder with a fixture to prevent the weight from rattling.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the plumb bob 1 has a straight outer cylinder 2 having a quadrangular cross section, and an inner cylinder 3 having a quadrangular cross section slidably accommodated in the axial direction. The inner cylinder 3 is appropriately extended. Then, a push button device 4 is attached to a lower portion of the inner cylinder 3 in the longitudinal direction in a mounting hole 3b penetrating the side plate 3a of the inner cylinder 3,
In addition, stopper holes 2b corresponding to the protruding portions 4a of the push button device 4 that can be inserted and removed are formed in the side plate 2a of the outer cylinder 2 which faces the outer cylinder 2 at predetermined intervals in the longitudinal direction of the outer cylinder 2, for example, 1 It is possible to adjust the total length of the swing 1 by one-touch type to a set length of between 2 (about 1.8 m) and 2 (about 3.6 m) (however, in Fig. 1, other stopper holes are omitted. ing). The protruding portion 4a of the button device 4 is constantly urged in the protruding direction by the spring 4b, and when the inner cylinder 3 is slid, it is pushed into the cylinder with a finger to be removed from the stopper hole 2b ( (See FIG. 5).

Further, as shown in FIG. 2, a contact plate 5 is attached to an upper portion of the side plate 2c adjacent to the side plate 2a, and a stopper 6 is screwed into a screw hole 5a formed in the contact plate 5. That is, the inner cylinder 3 can be fixed at an arbitrary position by screwing the stopper 6 and bringing its tip into contact with the side surface of the inner cylinder 3. Also, FIG. 1 and FIG.
As shown in FIG. 5, L-shaped contact pieces 7a and 7b are attached to the side plate 2d of the outer cylinder 2 and the side plate 3d of the inner cylinder 3 so that the tips of the contact pieces 7a and 7b can contact the measurement object. It has become.

Under the side plates 2a, 2c, 2d, 2e of the outer cylinder 2, lower window holes 8a and 8b having the illustrated shape are formed,
The weight 10 to be described later can be seen from the outside of the cylinder. Further, the lower end portion of the outer cylinder 2 has a center hole 9a.
1 and 4, a bottom plate 9 having a bottom is attached to the side plate 2a by a butterfly bolt 9b inserted in an elongated hole 8c penetrating the side plate 2a. It is fixed. Then, loosen the butterfly bolt 9b to remove the bottom plate 9
The height is adjusted.

On the other hand, as shown in FIGS. 1, 3 and 4,
On the upper end of the weight 10 having a substantially inverted conical shape, a cross-shaped swing board 1
1 is attached, and the tip of the weight 10 has a central hole 9 in the bottom plate 9.
The deflection plate 11 is formed so that the tip ends of the crosses are slightly projected to the outside of the outer cylinder 2 when the position is opposite to a. Further, a scale 11a is marked on the upper surface of the deflecting plate 11.

Next, a thread hooking portion for suspending the weight 10 will be described. As shown in FIGS. 1 and 2,
A spindle 14 that supports a pulley 13 is attached to an upper end portion of the inner cylinder 3, and a thread 12 that is hung on the pulley 13 and hangs down.
A weight 10 is attached to one end of the, and a balancer 15 having the same mass as the weight 10 is attached to the other end. The pulley 13 is installed at the position where the thread 1 is suspended on the side where the weight 10 is suspended.
2 is set so as to coincide with both axis lines of the outer cylinder 2 and the inner cylinder 3. On the other hand, on the side where the balancer 15 is suspended, the yarn 12 is inserted into a yarn guide 16 fixed to the inner cylinder 3 and then connected to the balancer 15. A guide rail 17 for guiding the balancer 15 in the axial direction of the inner cylinder 3 is provided on the inner side surface of the inner cylinder 3 so that the balancer 15 does not swing.

The lower surface of the cap 18 fitted into the upper end of the inner cylinder 3 is recessed along the shape of the pulley 13 to prevent the thread 12 from being accidentally detached from the pulley 13. A stopper 19 for fixing the lower limit position when the inner cylinder 3 descends is fixed to the upper end of the inner cylinder 3.

When using the plumb bob 1 of this embodiment, the plumb bob 1 is pulled to a desired length by pulling up the inner cylinder 3 from the inside of the outer cylinder 2. At this time, when the inner cylinder 3 sliding inside the outer cylinder 2 reaches a predetermined position set in advance, the protruding portion 4a of the push button device 4 engages with the stopper hole 2b and stops (see FIG. 1). Therefore, when the plumb bob 1 is set to a length that is frequently used, the plumb bob 1 can be adjusted by a one-touch method.
When the protrusion 4a is not engaged with the stopper hole 2b, the stopper 6 fixes the inner cylinder 3 (see FIG. 2).
Further, when the inner cylinder 3 rises, the weight 10 is lifted together with the thread 12, and the upper surface of the presiding board 11 comes into contact with the upper edges of the lower window holes 8a and 8b, so that the weight 10 is prevented from swinging. .
Then, the weight 10 is pulled down to a desired position by hand. When the tips of the contact pieces 7 a, 7 b are brought into contact with the object to be measured, the tips of the presiding board 11 project out of the cylinder in accordance with the inclination of the plumb bob 1. Therefore, the worker can know the degree of inclination of the plumb bob 1 by standing on the scale 11a by looking at the scale 11a. In this way, the plumb bob 1 is supported vertically to measure the verticality or the like of the object to be measured, or to mark a predetermined position on the ceiling. In this measurement, the tip of the weight 10 is often shaken in the center hole 9a of the bottom plate 9, but the tip of the weight 10 is used as the center hole depending on when the amplitude of the weight 10 is to be measured or the operator prefers. You may put it outside 9a. In this case, the height of the weight 10 can be finely adjusted only by manually moving the weight 10 up and down. Further, when the plumb bob 1 is transferred, as shown in FIG. 4, the butterfly bolt 9b is loosened to lift the bottom plate 9, the tip of the weight 10 is fitted into the center hole 9a, and the swing plate 11 is moved to the lower window. After contacting the upper edges of the holes 8a and 8b, the butterfly bolt 9b is screwed in to fix the weight 10 to prevent damage to the tip of the weight 10.

[0014]

As described above, in the plumb bob of the present invention, the thread hooking portion is simply configured, and moreover, the height of the weight can be easily finely adjusted, and the tip of the weight can be easily adjusted. Can be shaken in the center hole, or can be taken out and the amplitude can be known as appropriate. Also, since you can look down on the swing board and know the tilt of the plumb bob,
The worker does not need to stand or squat many times, which makes the work easier. Further, at the time of transfer or the like, by fixing the weight to the outer cylinder, the tip of the weight can be protected.

[Brief description of drawings]

FIG. 1 is a cut front view of a plumb bob in an example.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a cut side view showing a lower end portion of the plumb bob of the embodiment, showing a state in which a weight is fixed.

FIG. 5 is an enlarged cross-sectional view showing a push button device according to an embodiment.

[Explanation of symbols]

 1 Swing 2 Outer Cylinder 3 Inner Cylinder 6 Stoppers 8a, 8b Lower Window Hole 9 Bottom Plate 9b Butterfly Bolt 10 Weights 11 Pretend Board 12 Thread 15 Balancer

Claims (2)

[Scope of utility model registration request] 1. An outer cylinder having a window hole formed at a lower end portion and standing upright, an inner cylinder slidably inserted in the outer cylinder in an axial direction, and an outer cylinder protruding to an appropriate length from an upper end of the outer cylinder. In a plumb bob having a stopper for fixing the inner cylinder to the outer cylinder and a weight suspended by a thread at a position facing the window hole, a thread hooking portion is provided at an upper end portion of the inner cylinder. The thread is hung on the thread hooking portion so that both ends of the thread hang down, and the weight is attached to one end of the thread and the balancer having substantially the same mass as the weight is attached to the other end. Swing. 2. An outer cylinder having a window hole formed at a lower end portion and standing upright, an inner cylinder slidably inserted in the outer cylinder in an axial direction, and an outer cylinder protruding to an appropriate length from an upper end of the outer cylinder. In a plumb bob having a stopper for fixing the inner cylinder to the outer cylinder, and a weight suspended by a thread at a position facing the window hole, the weight passes through the window hole and A swing plate indicating the swinging condition of the weight is attached by the protruding length from the window hole, and a bottom plate having a central hole into which the tip of the weight can be fitted is attached to the outer cylinder so that the bottom plate can be moved up and down. A plumb bob which is provided with a fixture for fixing to the outer cylinder.