JPH05285862A - Marking tool - Google Patents

Abstract

PURPOSE:To perform clear marking by reliably adhering powder chalk to a thread even when an amount of powder chalk in a case is reduced or the thread is delivered by a long distance. CONSTITUTION:A marking tool comprises a reel 20 incorporated in a case filled with powder chalk and winding a thread 1, a spring core 30 inserted through the inner periphery of the reel 20, and a spiral spring 40 energizing the reel 20 in a direction in which the thread 1 is wound. The thread 1 provided at a tip with the pin 2 drawn out from the reel 20 through the thread unreeling hole H. The spring core 30 is fixed to the free end 52 of an arm 50 rockably mounted in the case 10. During unreeling of the thread 1, the reel 20 is displaced and powder chalk is surely adhered to the thread 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire drawing tool for drawing a wire on a construction site by stretching a thread having powdered chalk attached thereto and repelling the thread in a building such as a house.

[0002]

2. Description of the Related Art One of the tools carried by construction workers is
A wire drawing which has a case filled with powdered chalk and a reel which is rotatably incorporated in the case and winds a thread, and which is provided with a lancet at the tip and can be drawn out through a thread feeding hole of the case. There are ingredients. In the actual drawing work using this drawing tool, the carcass is pierced and locked at the starting point of drawing, and then the case is moved to a predetermined position so that the reel inside the case rotates. Unwind the thread by the moving distance,
In the feeding process, the powder chalk in the case is attached to the thread, and the thread stretched between the covering cases is flipped with a finger toward the surface of the mating material to mark a line by the powder chalk. can do.

[0003]

However, according to the above-mentioned conventional wire drawing tool, as the remaining amount of the powdered chalk in the case decreases, the amount of the powdered chalk attached when the yarn is unwound gradually decreases, resulting in a clear image. There is a problem that it becomes difficult to draw a line. The same difficulty also occurs when the case is moved relatively far from the locked karuko and a long line is drawn all at once. This is because when the remaining amount of powder chalk in the case decreases, or when the winding radius of the remaining thread on the outer circumference of the reel decreases due to the long thread being unwound, the thread stays in the lower part of the case in the powder chalk It is difficult to contact the. For this reason, the wire-drawing operator redraws the wire many times, or shakes or hits the case in the process of feeding the yarn by moving the case to loosen the powder choke in the case to promote the adhesion to the thread. The current situation is that such troublesome work is forced.

When the yarn is wound on the reel after the drawing, the volume of the yarn around the reel (winding radius) in the process.
As the volume increases, the yarn is wound up by pushing away the powder choke reservoir in the case. For this reason, although depending on the remaining amount of the powder chalk, there is a problem that it is difficult to smoothly perform the winding by the return spring due to the sliding resistance with the powder chalk pool during winding.

The present invention has been made under the circumstances as described above, and its technical problem is to reduce the remaining amount of powder chalk in the case, and to extend the yarn for a long time. The powder chalk is sufficiently and surely adhered to the yarn to enable clear drawing, and the yarn is smoothly wound.

[0006]

The above-mentioned technical problems are
The present invention can effectively solve the problem. That is, according to the present invention, a case filled with powdered chalk, a reel rotatably incorporated in the case to wind a yarn, a spring core rotatably inserted into an inner circumference of the reel, and one end of the reel A spiral spring fixed to the spring core and having the other end fixed to the spring core to urge the reel in the winding direction of the reel, and the thread provided with a rake at the tip is the thread feeding hole of the case. In the wire drawing tool drawn from the reel through the spring core, the spring core is fixed to a free end of an arm pivotally mounted in the case. In addition to this structure, it is more preferable that the reel is connected to a handle arranged displaceably outside the case.

[0007]

According to the above construction, since the reel wound with the yarn is supported by the free end of the arm via the spring core, the reel can be oscillated and displaced about the pivotal end of the arm. .. Therefore, when the yarn is unwound, the reel is displaced toward the powder choke pool side below the case due to its own weight including the yarn, and the unwound yarn comes into sliding contact with the powder choke pool. Also, even when the yarn is fed out for a relatively long time, the powder chalk adheres to the yarn sufficiently and reliably.

When the yarn is delivered, the spring is accumulated by the rotation of the reel, so that the required tension is applied to the yarn, and after the completion of the drawing, the loose lock is released.
Alternatively, if the case is moved to the side of the blade, the reel is rotated in the winding direction of the yarn by the stored spring and the yarn is automatically wound. In this winding process, the reel is freely displaced upwards as the volume of the yarn around the reel (winding radius) increases, so resistance during winding due to sliding contact with the powder choke pool is increased. Does not increase.

When a handle connected to the reel is displaceably provided outside the case, by operating this handle, the yarn wound on the reel is collected in the powder choke pool in the case when the yarn is fed. It can be pressed arbitrarily, and when winding the yarn, conversely, the yarn on the reel and the outer periphery thereof can be made completely out of contact with the powder chalk pool.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wire drawing tool according to the present invention will be described below together with its operation. First, in FIGS. 1 to 3, 1 is a thread having a kalko 2 attached to its tip, 10 is a case,
Reference numeral 20 is a reel rotatably incorporated in the case 10 to wind the yarn 1, 30 is a spring core rotatably inserted into the inner circumference of the reel 20, and 40 is urging the reel 20 in the winding direction of the yarn 1. It is a spiral spring.

The case 10 includes a main body 10A and the main body 1
And a cover 10B for opening and closing the upper opening of 0A. The main body 10A includes a pair of case members 11 and 12 in close contact with each other on a split surface extending in the longitudinal direction, a pipe 13 that forms a yarn feeding hole H, and a support ring 14 that supports the pipe 13 between the tip ends of the case members 11 and 12. And the rear end decoration cap 1
It consists of 5 and 5. One end of the cover 10B is opened and closed with the pivot 16 as a fulcrum, and the free end of the cover 10B is connected to the main body 1.
The locking member 17 rotatably provided at 0A maintains the closed state of the main body 10A with respect to the upper opening. As shown in FIG.
The groove-like unevenness as shown in FIG.
In the closed state due to, the inside of the case 10 is hermetically sealed by fitting the irregularities. In addition, the needle 3 having the needle 3 integrally protruded is hollow, and a required number of slits 2a are formed in the head thereof, and when not in use, it is fitted into the outer periphery of the pipe 13. You can do it.

A spring case 21 is integrally provided on the inner circumference of the reel 20, and includes a spring core 30 and a spiral spring 4.
0 is accommodated in this spring case 21. Spring core 3
The head portion 31 of 0 protrudes to the outside of the reel 20 from the inner diameter hole 21a formed in the side wall surface of the spring case 21, and one end 40a of the spiral spring 40 is fixed to the reel 20 side via the spring case 21. At the same time, the other end 40b is fixed to the spring core 30.

Reference numeral 50 denotes an arm swingably provided in the case 10, and a support shaft 11 provided at one end thereof has support holes 11a formed in the inner walls of the case members 11 and 12 constituting the case body 10A. 12a is pivotally attached. A head portion 31 of the spring core 30 protruding to the outside of the reel 20 is supported by a support hole 50a formed at a disc-shaped free end 52 of the arm 50. The spring core 30 is shown in FIG.
As also shown in FIG. 5, the elastically deformable locking claw 50b formed in the support hole 50a and the notch 31a having the inclined surface formed on the outer peripheral surface of the head portion 31 are engaged to tighten the spiral spring 40. The rotation in the direction X is permitted, and the rotation in the opposite direction, that is, the relaxation direction of the spiral spring 40 is prevented.

Reference numeral 60 denotes a disk-shaped handle disposed outside the case member 11. A central shaft portion 60a is inserted into the case 10 through an operation hole 11b formed on the side surface of the case member 11, A bolt 61 penetrating the shaft portion 60a and a nut 62 screwed to the tip of the bolt 61.
It is connected to the center of the reel 20 via. A proper play is provided between the operation hole 11b of the case member 11 and the shaft portion 60a of the handle 60.
It is tightly fitted to the shaft portion 60a and is sealed by a pair of dish-shaped packings 63 and 64 which slidably contact the wall surface around the operation hole 11b in the case member 11 from the inside and the outside. A sliding ring 65 made of a wear-resistant resin material is loosely fitted in the outer peripheral groove 60b of the handle 60.

In the wire drawing tool constructed as described above, the cover 10B is opened and the case 10 is filled with an appropriate amount of powder choke in advance. When using it for wire drawing work, first, remove the carcass 2 from the pipe 13 and lock the case 3 by piercing the needle 3 at the starting point of wire drawing on the surface of the mating material, and then holding the case 10 at a predetermined position. When the reel 20 inside the case 10 rotates, the yarn 1 is paid out by the moving distance by moving the reel 20 up to. At this time, the spring core 30 is engaged with the locking claw 5 of the arm 50.
Since the rotation of the spiral spring 40 in the loosening direction is blocked by the engagement with 0b, the spiral spring 40 is wound and accumulated with the rotation of the reel 20 due to the unwinding of the yarn 1. Therefore, an appropriate tension is applied to the unwound yarn 1 by the urging force of the spiral spring 40 in the winding direction.

As shown in FIG. 6, there is a powder chalk pool P in the lower part of the case 10, and when the yarn 1 is paid out, a part of the powder chalk in the powder chalk pool P rotates. The reel 20 and the thread 1 wound around the reel 20 are in sliding contact with each other, and the sliding contact also causes the case 10 to move.
Since the yarn 1 is scattered up to the upper part of the inner space and reaches the yarn 1 toward the yarn feeding hole H, a sufficient amount of powder choke necessary for drawing is attached to the yarn 1 to be fed.

Here, since the reel 20 is supported by the free end 52 of the arm 50 via the spring core 30 and the spring case 21, as shown by the phantom line in FIG. Since the oscillating displacement is possible as a fulcrum, when the yarn 1 is fed out, the reel 20 is displaced toward the powder choke pool P side by its own weight including the yarn 1 wound around the outer periphery thereof, and the fed yarn 1 is always powdered. Sliding on the choke reservoir P. That is, even if the remaining amount of the powder choke pool P decreases or the winding radius of the remaining yarn 1 on the reel 20 becomes small by reeling the yarn 1 for a long time, the reel 20 is lowered below the reel 20 during the reeling process. Due to the displacement, the powder chalk adheres to the yarn 1 sufficiently and surely. Therefore, the yarn 1 drawn out from the yarn feeding hole H and stretched between the sill 2 and the case 10 is flipped with a finger toward the surface of the mating material to clearly mark the line by the powder chalk. can do.

The thickness of the yarn 1 and the inner diameter of the yarn feeding hole H are set to be substantially the same so that the powder chalk in the case 10 does not accidentally leak out from the yarn feeding hole H. After the completion of the drawing work, the lock of the karuku 2 is released, or the case 10 is moved to the karuku 2 side, and the reel 20 is moved in the winding direction of the yarn 1 by the urging force of the stored spiral spring 40. It rotates and the thread 1 is automatically wound up. At this time, as the winding radius of the yarn wound around the outer periphery of the reel 20 and contacting the powder choke pool P increases, the reel 20 freely displaces upward, so that the powder choke pool P is slidably contacted. The resistance is not increased, and the yarn is smoothly wound.

The swing displacement of the reel 20 can be arbitrarily operated from the outside of the case 10 by a handle 60 connected to the reel 20. Therefore, when the yarn 1 is fed out, by pushing down the handle 60,
It is possible to forcibly slide the yarn 1 wound on the reel 20 into the powder chalk pool P so that a sufficient amount of powder choke necessary for drawing can be attached. Further, at the time of winding, the reel 20 can be lifted up via the handle 60 to be completely out of contact with the powder choke pool P, so that the sliding resistance with the powder choke is made zero, and the spiral is prevented. The winding rotation of the reel 20 by the biasing force of the spring 40 can be made extremely smooth. Since the handle 60 rotates integrally with the reel 20, the handle 60 may be operated by pinching the sliding ring 65 loosely fitted on the outer periphery thereof.

Further, as shown in FIG. 6, the spiral spring 40 winds the reel 20 so that the path of the yarn 1 from the reel 20 to the yarn feeding hole H is located on the opposite side of the powder choke pool P in the reel 20. By prescribing the take-out direction, the tension applied to the yarn 1 when the yarn 1 is fed out acts so as to automatically displace the reel 60 to the powder choke reservoir P side. It is extremely effective in adhering to.

[0021]

As is apparent from the above description, according to the wire drawing tool of the present invention, the reel around which the yarn is wound can be oscillated and displaced in the case with the pivot end of the arm as a fulcrum. The following effects can be achieved. (1) When unwinding the thread, the thread wound on the reel can be brought into sliding contact with the powder choke reservoir in the case either automatically or by operating the handle. Even when the amount is small or when the yarn is unrolled for a relatively long time, the powder chalk adheres to the yarn sufficiently and reliably, and a clear line can always be drawn. There is no need for the troublesome work of shaking or hitting the case in the process of reeling out the yarn in order to promote the adhesion of the powder chalk. (2) When winding the yarn, the rotating reel is free, so the sliding resistance with the powder choke pool does not increase, or the sliding resistance can be made zero by operating the handle, and the winding operation is It can be done very smoothly.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a wire drawing tool according to the present invention.

FIG. 2 is an exploded perspective view of the wire drawing tool according to the embodiment.

FIG. 3 is a sectional view of the wire drawing tool according to the embodiment, taken along a plane passing through the axis of the reel 20 in the longitudinal direction.

FIG. 4 is an explanatory view showing an abutting portion of a case member 10A and a cover 10B of the wire drawing tool according to the embodiment.

FIG. 5 is a perspective view of a main part of the wire drawing tool according to the embodiment.

FIG. 6 is an operation explanatory view of the wire drawing tool according to the embodiment.

[Explanation of symbols]

 1 Thread 2 Karuko 10 Case 20 Reel 30 Spring Core 31a Notch 40 Spiral Spring 50 Arm 50a Support Hole 50b Locking Claw 51 Spindle (Pivoting End) 52 Free End 60 Handle H Thread Feeding Hole P Powder Choke Reservoir

Claims (2)

[Claims] 1. A case filled with powdered chalk, a reel rotatably incorporated in the case for winding a thread, a spring core rotatably inserted into an inner circumference of the reel, and one end of the reel. A spiral spring fixed to the spring core and having the other end fixed to the spring core to urge the reel in the winding direction of the reel, and the thread provided with a rake at the tip is the thread feeding hole of the case. A wire drawing tool drawn out from the reel through the spring core, wherein the spring core is fixed to a free end of an arm pivotally mounted in the case. 2. The wire drawing tool according to claim 1, wherein the reel is connected to a handle arranged displaceably outside the case.