JP2008209178A - Plumb bob - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple plumb bob that can vertically measure by a thread string that hangs from the helmet worn by a worker to the right in front of the worker and allows vertical measurement at any time, wherever, without the place or conditions. <P>SOLUTION: A telescopic shaft 3 is attached to an upper part of the helmet 2 in an arrangement in the longitudinal direction of the helmet 2, the telescopic shaft 3 is provided with a winding mechanism 6 of the thread string 5 that hangs from the tip, and a weight 7 is attached to the lower end of the thread string 5 that hangs from the tip of the telescopic shaft 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a downward swing for visually confirming the verticality of an object in various constructions and civil engineering works.

  Generally, in various constructions and civil engineering works, vertical confirmation of each part is required during construction, and a downward swing is used as vertical confirmation.

  Conventionally, as a general downward swing for viewing vertically, a thread is hung from the center of a tripod and a weight is attached to the lower end of the thread, or a winding that allows the thread to be drawn out and wound up freely. The take-up mechanism is provided with a fixing means, and a thread attached to the tip of the thread drawn out from the take-up mechanism is used, and the hanging thread becomes vertical with the weight at the lower end, so that the vertical thread and It is judged whether it is vertical by looking at the measurement object.

  By the way, the above-mentioned conventional downward swing requires a tripod and a winding mechanism to be fixed each time it is measured, which not only takes time for measurement but also in particular when it is necessary to measure a large number of points in order. The moving work becomes complicated, and there is a problem that measurement cannot be performed when there is no space or place for setting up a tripod or fixing the winding mechanism.

  Therefore, an object of the present invention is to enable vertical measurement with a thread hung in front of the operator from a helmet or the like worn by an operator, so that the vertical measurement can be performed anytime anywhere regardless of location and conditions. Is to provide.

  In order to solve the above-described problems, the present invention includes an extension shaft attached to an upper portion of the cap member in an arrangement along the front-rear direction of the hat member, and a yarn provided so as to hang from the tip of the extension shaft. The structure formed by the weight attached to the lower end of the yarn is employed.

  A yarn winding mechanism is provided on the rear end side of the telescopic shaft, and the winding mechanism allows the yarn to be pulled out and wound, or the telescopic shaft is an attachment member with respect to the cap member. The structure can be detachable.

  Here, the cap member uses a helmet worn in various constructions and civil engineering work, and the telescopic shaft is formed by combining telescopic pipes with different diameters, and the rear end side is attached or detached like a fixed type or sucker. It is attached on the helmet with a mounting member of the type, and has a length such that the tip protrudes to the front position of the operator in the extended state.

  In addition, the winding mechanism urges the reel incorporated in the case to rotate in the direction of winding the yarn with a spiral spring, and the yarn pulled out from the reel is guided in the length direction in the telescopic shaft to expand and contract The case is provided with a lock mechanism that is pulled out from the tip of the shaft and that holds the yarn drawn out in a fixed manner and enables the yarn to be wound.

  A suction cup or a magnet is used as an attachment member for making the telescopic shaft detachable with respect to the helmet. By removing it from the helmet, the downward swing can be used alone by attaching it to another member with a suction cup or a magnet.

  According to the present invention, the telescopic shaft is attached to the upper part of the cap member, and the weight is attached to the lower end of the yarn hanging from the tip of the telescopic shaft. If the thread hangs down from the tip of the thread, the thread is placed vertically by the weight at the lower end in front of the operator's eyes, and the operator looks at this thread and the object to be measured, It can be determined whether or not it is vertical, and therefore vertical measurement can be performed anytime and anywhere regardless of location and conditions.

  Moreover, it will move with an operator by attaching to the cap member worn on a head, and the work efficiency in the case of measuring many places in order can be improved.

  Furthermore, if the retractable shaft is shortened and the yarn is wound up, the entire body becomes low in volume and there is no protruding portion with respect to the front of the operator, so that there is no hindrance to normal work and the swinging down from the cap member is performed. If it is removed, the cap member can be used in a normal state as it is, and the downward swing can be attached to another member and used alone.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in the figure, the downward swing 1 is attached to the upper part of the helmet 2 which is a cap member by attaching the telescopic shaft 3 with the mounting member 4 in the arrangement along the front-rear direction of the helmet 2 and threaded on the rear end side of the telescopic shaft 3. A winding mechanism 6 for the strip 5 is provided, and the yarn 5 drawn out from the winding mechanism 6 is made to hang down from the tip of the telescopic shaft 3 by passing through the inside along the length direction of the telescopic shaft 3. A weight 7 is attached to the lower end of the yarn 5.

  The telescopic shaft 3 is formed such that a plurality of pipes having different diameters are telescopically combined and has a length such that the tip protrudes to the front position of the operator in the stretched state. In the example of FIG. Is fixed to the helmet 2 via an attachment member 4 provided on the helmet 2.

  In the example of FIG. 3, the suction cup 4 a is used as an attachment member for fixing the lower swing 1 on the helmet 2, and the lower swing 1 is detachably mounted on the helmet 2. A magnet may be used instead of the suction cup 4a.

  In this way, if the lower swing 1 is made detachable with respect to the helmet 2, the helmet 2 and the lower swing 1 can be used independently, and the lower swing 1 is sucked by the suction cup 4a regardless of the presence or absence of the helmet 2. By attaching to, it is possible to perform vertical measurement alone.

  The winding mechanism 6 is not shown in detail in the figure, but just like a tape measure, the reel incorporated in the case 8 urges the rotational elasticity in the direction of winding the yarn 5 with a spiral spring and pulls it out of the reel. The thread 5 is guided in the length direction in the telescopic shaft 3 and is drawn downward from a pulley 9 provided at the tip of the telescopic shaft 3, and the case 8 is fixed and held in a pulled state of the thread 5. A locking mechanism 10 that enables winding of the yarn 5 is provided.

  When the telescopic shaft 3 is contracted and the yarn 5 is taken up by the take-up mechanism 6, the entire lower swing 1 becomes bulky and does not have a protruding portion with respect to the front of the operator, thereby completely hindering normal work. There is no.

  The downward swing 1 of the present invention is configured as described above, and the downward swing 1 is attached to the top of the helmet 2 with the telescopic shaft 3 arranged along the front-rear direction, as shown in FIG. 1 and FIG. An operator wears the helmet 2 on the head so that the telescopic shaft 3 faces in the front-rear direction, and in order to perform vertical detection, the telescopic shaft 3 is stretched forward, the yarn 5 is pulled out, and the tip of the telescopic shaft 3 The thread 5 is arranged vertically by the weight 7 at the lower end in front of the operator's eyes, and the worker can stand and visually observe the thread 5 and the object to be measured. Thus, it is possible to determine whether or not the object to be measured is vertical based on the vertical yarn 5, and therefore, the vertical measurement can be performed anytime and anywhere regardless of the location and conditions.

  Moreover, the downward swing 1 will be moved together with the operator by attaching it to the helmet 2 worn on the head of the operator, and the work efficiency when measuring a number of locations in sequence can be improved.

  When the swinging swing 1 is not used, if the telescopic shaft 3 is shortened and the yarn 5 is wound around the winding mechanism 6, the entire swinging swing 1 becomes bulky and there is no projecting portion with respect to the front of the operator. If there is no hindrance to the work and the mounting member is a sucker 4a or a magnet and the swinging swing 1 is detachable with respect to the helmet 2, the processing for the helmet 2 becomes unnecessary. By removing the helmet 2, the helmet 2 can be used in a normal state as it is, and the downward swing 1 can be used independently regardless of the presence or absence of the helmet 2 by attaching it to another member with a suction cup 4 a or a magnet.

The side view which shows the use condition of the downward swing which concerns on this invention (A) is a perspective view of swinging down, (b) is a partially cutaway side view in which the tip of the telescopic shaft of swinging down and the yarn and weight are enlarged. (A) is a side view showing a use state using a suction cup for attaching a swinging swing to a helmet, (b) is a perspective view of the same.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Down swing 2 Helmet 3 Telescopic shaft 4 Mounting member 4a Suction cup 5 Thread 6 Winding mechanism 7 Weight 8 Case 9 Pulley 10 Lock mechanism

Claims (3)

  It is formed of an extension shaft attached to the top of the hat member in an arrangement along the front-rear direction of the hat member, a yarn provided so as to hang from the tip of the extension shaft, and a weight attached to the lower end of the yarn. Down swing.   The downward swing according to claim 1, wherein a yarn winding mechanism is provided on the rear end side of the telescopic shaft, and the yarn can be drawn out and wound by the winding mechanism.   The downward swing according to claim 1 or 2, wherein the telescopic shaft is detachably attached to the cap member by an attachment member.

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