JPH075014U - Plumb bob - Google Patents

Abstract

(57) [Summary] [Purpose] Allows fine adjustment of the height of the weight and fixation, and
Allow the worker to know the tilt of the outer cylinder while standing. [Structure] An inner cylinder 3 is slidably inserted into an outer cylinder 2 having lower window holes 8a and 8b formed at its lower end, and the inner cylinder 3 protruding from the upper end of the outer cylinder 2 to a proper length is used as a stopper. To be fixed. A pulley 13 is provided on the upper end of the inner cylinder 3, and a weight 10 is attached to one end of a thread 12 hung on the pulley 13 so that both ends thereof hang down, and a balancer 15 having substantially the same mass as the weight 10 is attached to the other end.
Attach. Furthermore, a swinging plate 11 that penetrates the lower window holes 8a and 8b and projects outside the cylinder is attached to the upper end of the weight 10 while the tip of the weight 10 is fitted to the lower end of the outer cylinder 2. A bottom plate 9 having a central hole 9a to be obtained is attached so as to be able to move up and down, and the bottom plate 9 can be fixed to the outer cylinder 2 with a wing bolt 9b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plumb bob used for checking the verticality of a structure or marking a point on a vertical line on the structure.

[0002]

[Prior 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 the structure (for example, (See Japanese Patent Publication No. 53-51179).

[0003]

[Problems to be solved by the device]

 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. There is also a demand for fine adjustment of the height of the weight so that the swing of the weight can be easily seen. In addition, in the conventional model, the worker was forced to stand and crouch many times in order to confirm the position of the tip of the weight, and the workability was poor.

Therefore, the present invention solves the problem of providing a plumb bob which facilitates fine adjustment of the height of the weight and fixation of the weight and allows the operator to know the tilt of the outer cylinder while standing upright. This is a technical issue that should be addressed.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the following plumb bobs were created. That is, according to the present invention, an outer cylinder having a window hole formed in 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 thereof. 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 the upper end of the inner cylinder. The present invention is characterized in that the thread is hung on the thread hooking portion so that both ends of the thread hang down, 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. There is. Further, the weight may be fitted with a deflecting plate that penetrates the window hole and indicates a swinging condition of the weight by a protruding length from the window hole, and a tip of the weight may be fitted into the outer cylinder. It is characterized in that a bottom plate having a central hole formed therein 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]

[Action]

 Slide the inner cylinder inside the outer cylinder and set the plumb bob to the 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 on the thread hooking portion, and the height of the weight can be freely adjusted. The swing plate projects from the window hole according to the inclination of the outer cylinder, so that the operator can support the plumb bob in a substantially vertical position while standing upright. When transferring, 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]

【Example】

 Next, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the plumb bob 1 includes a straight outer tube 2 having a quadrangular cross section and an inner tube 3 having a quadrangular cross section slidably accommodated in the axial direction. The inner cylinder 3 is appropriately extended from the inside. A push button device 4 is attached to a mounting hole 3b penetrating the side plate 3a of the inner cylinder 3 at the lower portion of the inner cylinder 3 in the longitudinal direction, and a push button device 4 is mounted on the side plate 2a of the outer cylinder 2 facing the same. Stopper holes 2b corresponding to the protruding portions 4a of the button device 4 that can be inserted and removed are provided at predetermined intervals in the longitudinal direction of the outer cylinder 2, and for example, one interval (about 1.8 m), two intervals (about 3.6 m). The total length of the swing 1 can be adjusted in a one-touch manner to the set length (however, in Fig. 1, other stopper holes are omitted). The protruding portion 4a of the button device 4 is always 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 and separated 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 tube 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 tube 3. Further, as shown in FIGS. 1 and 3, 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, and the tips of the L-shaped contact pieces 7a and 7b are attached to the measurement object. Can be contacted.

Under the side plates 2a, 2c, 2d, 2e of the outer cylinder 2, lower window holes 8a and 8b shown in the figure are formed so that the weight 10 described later can be seen from the outside of the cylinder. It has become. Further, a bottom plate 9 having a center hole 9a is vertically slidably fitted into the lower end portion of the outer cylinder 2, and the bottom plate 9 is an elongated hole formed through the side plate 2a as shown in FIGS. It is fixed to the side plate 2a by a wing bolt 9b inserted through 8c. Then, the butterfly bolt 9b is loosened to adjust the height of the bottom plate 9.

On the other hand, as shown in FIG. 1, FIG. 3 and FIG. 4, a cross-shaped swing board 11 is attached to the upper end portion of the substantially inverted conical weight 10, and the tip of the weight 10 has a bottom plate 9. When it is in a position facing the center hole 9a, the swinging plate 11 is formed so that each tip of the cross slightly projects to the outside of the outer cylinder 2. Further, the 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 the upper end of the inner cylinder 3, and a weight 10 is attached to one end of a thread 12 that is hung and hung on the pulley 13. A balancer 15 having the same mass as the weight 10 is attached to the other end. The attachment position of the pulley 13 is set so that the thread 12 is aligned with both axis lines of the outer cylinder 2 and the inner cylinder 3 on the side where the weight 10 is suspended. 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.

Further, the lower surface of the cap 18 fitted in the upper end portion 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 preset predetermined position, 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 in one-touch manner. 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 swing board 11 contacts 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. Then, 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 outside the cylinder in accordance with the inclination of the plumb bob 1. Therefore, the operator can know the degree of tilt 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 and the like of the object to be measured, and a predetermined position on the ceiling is marked. 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 may be adjusted depending on the operator's preference and the amplitude of the weight 10. You may put it outside 9a. In this case, the height of the weight 10 can be finely adjusted only by raising and lowering the weight 10 by hand. 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, and the tip of the weight 10 is fitted into the center hole 9a and the swing plate 11 is moved downward. After being brought into contact with the upper edges of the windows 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]

[Effect of device]

 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 is placed in the center hole. It is also possible to appropriately sway with or to go out and know the amplitude. Also, since the tilt of the plumb bob can be known by looking down on the swing board, the worker does not need to stand and crouch many times, which makes the work easier. Furthermore, the tip of the weight can be protected by fixing the weight to the outer cylinder during transportation.

[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.