JP2002098533A - Plumb bob - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plumb bob capable of using a further weighted plumb having an advantage under strong wind condition in addition to a conventional plumb. SOLUTION: A thread 4 is wound around a winding body 7, and a coil spring 71 reeling the thread 4 is mounted in the winding body 7. The plumb bob 1 includes a case 2 in which the winding body 7 is rotationally supported by a winding body support axis 6, and under which a hook 3 is mounted to hang a coupling tool 5 or the thread 4 pulled out from the case. The adjustment of the balance between the weight of the plumb 10 suspended by the coupling tool 5 and the force of the winding body 7 to reel is carried out by winding the thread 4 between the plumb 10 and the hook 3 at appropriate times.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plumb bob for measuring the verticality of a building.

[0002]

2. Description of the Related Art Conventionally, a plumb bob is often used to measure the verticality of a column or a wall, etc., and the main body is mounted on an upper portion of a column or a wall, etc. Is suspended, and the vertical state of the pillars and walls is measured. At least the bobbin is wound around a shaft erected inside the case, and a winding cylinder equipped with a take-up spring that winds the yarn inside is supported by the shaft. Usually, a sliding resistance portion for adjusting the balance between the weight of the weight and the winding force of the winding drum for winding the yarn is provided.

[0003] The sliding resistance portion increases or decreases the sliding resistance between the thread and the pin, that is, the frictional force, by contacting or hanging the thread with a hand or a jig on a pin standing or erected in the sliding resistance portion. The balance between the weight of the weight suspended from the yarn and the winding force of the winding cylinder for winding the yarn can be adjusted, so that the weight having a predetermined weight can be stopped in the air. . There is also a method in which a thread is hung on a rotatable pin or a frame, and the sliding resistance between the thread and the pin is changed to adjust the balance.

The weight of the weight currently used is:
The weight of the light weight is 400 grams and the weight of the heavy weight is 1500 grams, and the sliding resistance portion can adjust the balance between the weight of the suspended weight and the winding force of the drum for winding the yarn in this weight range. I have. However, measurement with a suspended weight of this weight is effective when carried out indoors where the wind is weak, and when carried out outdoors where the wind is strong, the suspended weight vibrates violently. It was not in a state where measurements could be made, and the measurement work was often interrupted.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide a down swing that enables the use of a heavier weight that is advantageous for measurement under strong winds together with a conventional weight. Things.

[0006]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a case, a shaft erected in the case, and a winding urging mechanism rotatably supported by the shaft. A winding cylinder having a winding spring inside, a yarn wound around the winding drum, and a fastening device attached to an end of the yarn passing through an entrance of a case, and the case is wound around the yarn. Hook is provided, which can be hooked on the hook and the weight, and
A down swing characterized by being attached to a hook or a weight.

The present invention will be described in further detail. A case is made of a resin or metal appropriately formed in a desired shape, and a winding drum around which a thread is wound around a shaft erected on an inner wall thereof. And a coil-shaped take-up spring for winding the yarn is provided inside the winding drum. The thread has a hook attached to its end, and functions as a hook for suspending the weight and as a stopper for preventing the thread from being drawn into the case during winding.

[0008] The structure and shape of the attachment are not particularly limited either. The weight can be hung, the thread can be prevented from being drawn into the case, and the weight and the case can be prevented. Anything can be used as long as the thread can be looped between the hook and the hook provided on the hook. For example, an appropriately shaped ring may be used, or the ring may be constituted by a fixed arm and a movable arm so that a predetermined portion can be opened and closed. Further, a hole for passing the thread through the hook is formed in the vertical direction, the thread is passed through the hole to prevent the hook from dropping off at the end of the thread, and a member that can be locked to the hook is fixed. Then, the hook may be provided so as to be able to move between the member at the end of the yarn and the entrance of the case.

The weight is generally provided with a member such as a hanging handle on which a thread or a fastening device is hung on the upper part. However, depending on the type of the weight, a type in which the hanging thread is directly fixed to the weight body may be used. is there. In this case, a ring-shaped or hook-shaped auxiliary tool may be attached to the weight main body so that the fastening tool can be locked. Further, the ring-shaped assisting tool may have a structure that can open and close a predetermined position.

An appropriate number of hooks are provided below the case for hanging the drawn yarn or a hook attached to the yarn, and the specific position is preferably near the entrance of the yarn. The hook is not particularly limited as long as the hook or the thread can be hung, and the structure and the shape are not particularly limited, but preferably, the hook is constituted by a fixed member and a movable member, It is preferable that the hook can be hooked and unlatched by opening and closing the movable member.
The hook may be substantially V-shaped so that the hanging position of the attachment or the thread is automatically determined. The weight is suspended from the thread, and the balance between the weight of the weight and the winding force of the drum that winds the thread is adjusted by adjusting the weight of the weight and the hook provided on the case. It is adjusted by the number of times. The number of times the yarn is wrapped varies depending on the weight of the suspended weight.

In addition to the above-described adjustment based on the number of times the yarn is wound, a sliding resistance portion may be provided for increasing the resistance when the yarn is drawn or wound, and the resistance may be further reduced. Adjustment means for increasing or decreasing may be provided. As a specific structure for increasing the resistance, the sliding resistance when the yarn is pulled out or wound by bringing the yarn into contact with or hanging around a plurality of pins erected or erected on the case. It only has to increase.
However, the method is not limited to this method as long as the sliding resistance can be increased. The structure of the adjusting means for increasing or decreasing the resistance is not particularly limited, and any structure may be used.However, when the resistance is increased by the above-described method, the yarn that is in contact with or hung on the pin is mechanically or manually. By changing the state of the contact strength or the contact distance, the frictional force between the yarn and the pin may be changed.

It is preferable that the device for mechanically adjusting the increase or decrease of the resistance is provided with its operating portion facing the outside of the case. It is preferable to provide a part or the whole of the case facing the outside of the case. Then, a hook for locking the attachment provided on the case may be formed on the pin of the sliding resistance portion. The portion to be formed may be anywhere on the pin as long as the thread can be hooked, but is preferably formed at the end of the pin. In that case, the pin provided inside the case is
It is preferable that one end of the pin is protruded to the outside of the case and formed at the protruding end of the pin. Also, so that the thread hung on the hook hangs almost near the entrance and exit of the thread,
A yarn guide may be provided near the entrance.

[0013]

The down swing of the present invention is configured as described above. Therefore, when using a weight that is heavier than the conventionally used weight, that is, a heavy weight that cannot be adjusted by the sliding resistance portion,
The weight is engaged with the thread engaging device, and adjustment is performed to balance the weight of the weight with the winding force of the winding drum that winds the thread.

For the adjustment, the thread is passed through the hanging handle of the weight, and the hook at the tip of the thread is hooked on the hook of the case. Thereby, there are two threads between the lifting handle and the hook. If the weight does not drop in this state, the weight of the weight and the winding force of the winding drum that winds the thread are balanced, and the weight stops at a desired height.

However, if the weight is still heavy and the weight falls, the hook is removed from the hook, the thread is hooked on the hook, and the hook is removed and extended to the handle of the weight. Multiply. Thereby, there are three yarns between the lifting handle and the hook. Then, in this state, it is confirmed whether or not the weight has fallen. As described above, the balance between the weight of the weight and the winding force of the winding drum can be adjusted by hanging the thread between the hanging handle of the weight and the hook.

That is, by hanging the thread between the hanging handle of the weight and the hook, the resistance due to friction when the thread slides on the hanging handle or the hook is increased, and the movement of the thread is stopped. Stops the weight from falling. Therefore, the winding force of the winding drum that winds the hanging string is assisted by the resistance due to the friction, and the hanging state (the hanging string 1) is normally achieved.
In the case of hanging with a book, it is possible to hang a weight having a weight that falls.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a plunger according to the present invention. FIG. The notch 22 is provided with a pin 8 of a sliding resistance portion. Reference numeral 3 denotes a hook provided on the case 2 for hanging the thread 4 or the fastening device 5, reference numeral 4 denotes a thread that enters and exits from the entrance 21, and reference numeral 5 denotes a fastening device that suspends the weight 10 fixed to the tip of the thread 4. Reference numeral 12 denotes a magnet for fixing the main body to a magnetically attachable metal, and reference numeral 13 denotes a main body.
An operation rod for driving a needle 14 for fixing the main body to a stabble member.

FIG. 2 is a side view showing the inside of the plumb bob. Reference numeral 6 denotes a bobbin supporting shaft erected on the inner wall of the case 2.
Is supported around a winding drum 7 in which a coil spring 71 for winding the yarn 4 is wound. This drum 7
The thread 4 coming out of the case 2 is wrapped around two pins 8 provided in the cutout portion 22 of the case 2 and exits through the entrance 21 to the outside of the case 2. 9 is a guide for the yarn 4. The cutout portion 22 where the thread 4 is wound around the pin 8 is a sliding resistance portion, and is a portion provided to increase or decrease the resistance when the thread 4 is pulled out or wound. Reference numeral 12 denotes a magnet, 13 denotes an operation rod, 14 denotes a needle, and 15 denotes a coil spring for returning the needle 14.

In this figure, a sliding resistance portion is provided outside the case 2 so that the thread 4 can be wound around the pin 8 by hand. Thereby, the balance between the weight of the weight and the winding force of the winding drum 7 can be adjusted very finely. This is a case in which a conventional weight is used, and a case where a weight having a balance adjustable weight is suspended by one thread 4. FIG. 3 is a front view of the down swing. FIG. 4 is a bottom view of the swing down.

FIG. 5 is an enlarged view showing a hook portion of the case. The hook 3 is composed of a fixed pin 31 and a movable pin 32. The movable pin 32 can be opened and closed with a support shaft 33 as a fulcrum. . The hook 3 in this figure is substantially V-shaped so that the hanging position of the attachment and the thread can be automatically determined. The movable pin 32 is preferably urged by an elastic member such as a spring so that the movable pin 32 is always in a closed state.
Further, the movable pin 32 may be formed of a material having resilience. (A) is a state where the movable pin 32 is closed, and (b) is a state where the movable pin 32 is open.

FIG. 6 is an enlarged view showing another example of the hook. The hook shown in FIG. 6 is another example of the hook 3 shown in FIG. You can do it. The dimensions of the hook 3 and the accommodation portion of the hook 3 vary depending on the type and size of the fastening device 5. (A) In the figure, both ends are fixed to the case 2, and an upward projection 34 for hanging the thread 4 or the fastening device 5 is provided between them. (B) In the figure, one end is case 2
And the other end is a free end.

FIG. 7 is a partially enlarged view showing the inside of a hanging tool having a hook formed on a pin.
The hook 3a is formed at one end of the "a". 9
1 is a thread guide for suspending the weight 10 at an appropriate position when the hook 5 or the thread 4 is hooked on the hook 3a.

FIG. 8 is a side view showing a ring-shaped attachment that can be opened and closed by a hanging arm.
The suspension arm 51 includes a fixed arm 52 and a movable arm 53.
And can be opened and closed. Reference numeral 54 denotes a support shaft of the movable arm 53. Then, the movable arm 53 may be urged by an elastic member such as a spring so as to be always closed. Further, the movable arm 53 may be formed of a material having resilience. The shape is not limited to this shape as long as the hanging arm can be opened and closed, and may be any shape. When hanging the weight on the fixed arm 52 of the suspension arm 51, the movable arm 53 is pushed open to hang.

FIG. 9 is a side view showing another example of the fastening device. Reference numeral 5a denotes a fastening device in which a hole 56 for passing the thread 4 is formed, and the suspension arm 51a is a fixed arm 52a. And a movable arm 53a.
Not to come off. 54a is a movable arm 5
This is the support shaft 3a. The movable arm 53a is preferably urged by an elastic member such as a spring so as to be always in a closed state. Further, the movable arm 53a may be formed of a material having resilience. At the end of the thread 4 that has passed through the hole 56, a locking member 55 that can prevent the hook 5a from falling off and lock the hook 3 of the case 2 is fixed. The shape of the locking member 55 may be any as long as it can be locked to the hook 3. That is, since the attachment 5a is not fixed to the thread 4, the thread 4 can be freely extended as shown in FIG. When the weight is hung on the fixed arm 52a of the suspension arm 51a, the movable arm 53a is pushed open and hung.

FIG. 3A shows a state in which an article is suspended by one thread 4. (B) The figure shows a state in which the thread 4 is hung and adjusted, in which the thread 4 is further extended from the hook 5a, and the locking member 55 is hung on the hook 3 (not shown) of the case 2. Thereby, the attachment 5a can be supported by the two yarns 4. Further, from the above-described state in which the anchor 5a is supported by the two threads 4, the locking member 55 is detached from the hook 3, the thread 4 is hooked on the hook 3, and the detached locking member 55 is engaged with the anchor. The hook 5a can be supported by three threads 4 by extending it to 5a and hanging it on the fixed arm 52a.

FIG. 10 is a view showing a state in which the yarn is wrapped around. The balance between the weight of the weight (10 or 10a) and the winding force of the winding drum 7 cannot be adjusted by the sliding resistance portion provided in the case. 3 shows a state in which the balance is adjusted by looping the yarn 4. FIG. (A) shows a state where the two yarns 4 are balanced. At this time, the thread 4 is hung on the handle 11 of the weight 10, and the hook 5 of the tip of the thread 4 is extended to the hook 3 of the case 2. In other words, it is possible to adjust the balance by running the thread once. (B) The figure shows the heavier weight 10a
And shows a state where the three yarns 4 are balanced. The adjustment at this time is the weight 10
The thread 4 is hooked on the hook 11 of the a, the thread 4 is hooked on the hook 3 of the case 2, and the hook 5 at the tip of the thread 4 is extended to the hook 11 and hooked. In other words, it is possible to adjust the balance by running the yarn twice.

[0027]

The down swing according to the present invention is configured as described above, so that together with the conventionally used weight, a heavier weight which is advantageous in measurement under strong wind can be used. Also, when adjusting the balance with the winding force of the winding drum that winds the yarn when the heavy weight is hung, the adjustment can be easily performed by hanging the yarn between the weight and the hook provided on the case. Can be.

As described above, the balance between the weight of the weight and the winding force of the winding drum for winding the yarn is adjusted by hanging the yarn between the weight and the hook, so that the internal mechanism is not changed. Also, since the case is not enlarged, the weight or volume of the plunger main body is hardly different from the conventional one. Therefore, the weight range of the usable weight can be expanded without lowering the operability and the handling. And it can provide at low cost.

[Brief description of the drawings]

FIG. 1 is a side view showing a plumb bob according to the present invention.

FIG. 2 is a side view showing the inside of a plumb bob.

FIG. 3 is a front view of a plumb bob.

FIG. 4 is a bottom view of a plumb bob.

FIG. 5 is an enlarged view showing a hook portion of the case.

FIG. 6 is an enlarged view showing another example of the hook.

FIG. 7 is a partially enlarged view showing the inside of a plunger in which a hook is formed on a pin.

FIG. 8 is a side view showing a ring-shaped fastening that can be opened and closed by a suspension arm.

FIG. 9 is a side view showing another example of the fastening device.

FIG. 10 is a diagram showing a state in which the yarn is wound around.

[Explanation of symbols]

1-Plumb, 2-Case, 21-Entrance, 22-Notch, 3-Hook, 3A-Hook, 3B-Hook, 3
c-hook, 31-fixed pin, 32-movable pin, 33-
Support shaft, 34-projection, 4-thread, 5-fastener, 50-fastener, 5a-fastener, 51-suspend arm, 51a-suspend arm, 52-fixed arm, 52a-fixed arm , 53-
Movable arm, 53a-movable arm, 54-support shaft, 54a
-Support shaft, 55-locking member, 56-hole, 6 -roller support shaft, 7
Winding cylinder, 71-coil spring, 8-pin, 8a-pin, 9
-Guide, 91-thread guide, 10-weight, 10a-weight, 11
-Lifter, 12-Magnet, 13-Control rod, 14-
Needle, 15-coil spring

Claims (5)

[Claims] (1) A case and a shaft erected in this case
And a winding bias that is rotatably supported on this shaft.
And a thread wound around the winding cylinder
Attached to the end of the thread passing through the entrance of the case.
It consists of a hooked attachment, and hangs a thread around the case.
Hooks are provided that can
The anchor wraps the thread between this hook and the weight
Characterized by being attached to a hook or a weight
Fake 2. The swing according to claim 1, wherein said hook comprises a fixed member and a movable member. 3. The swing-down swing according to claim 1, wherein said fastening member is a frame comprising a fixed arm and a movable arm. 4. A thread for passing a thread is formed in the fastening device in a vertical direction, and the end of the thread passing through the hole is prevented from falling off of the fastening tool and engaged with the hook. 2. The plunger according to claim 1, wherein the stoppable member is fixed. 5. The case is provided with a sliding resistance portion comprising an erect or erected pin for increasing the resistance when the yarn is pulled out or wound up, and the one end of the pin is engaged with the sliding resistance portion. 2. The swing of claim 1, wherein a hook for locking the tool is formed.