JP2015067372A - Wire drawing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire drawing tool capable of reducing projection of a thread from a reel by decelerating and stopping inertial rotation of the reel by drawing of the thread.SOLUTION: A ratchet device is coupled to an axis 2a of a reel 2 for winding a thread for marking rotatably disposed in cases 1a, 1b for a wire drawing tool 1, and the reel 2 continuing to rotate even after stopping of drawing of the thread by inertial rotation is stopped by decelerating rotation of the reel 2 by contact resistance of a pawl claw 4b contacting a gear 4a rotating with the axis 2a of the reel 2 of the ratchet device.

Description

  The present invention relates to a drawing tool.

  Conventionally, there is a ink brush as a representative drawing tool, which is used as a tool for easily drawing a long straight line on the surface of a material such as wood during construction. For drawing a straight line by the same method as the ink brush, a drawing tool for drawing a straight line using, for example, chalk powder which is a powder body that is easy to handle instead of the ink or ink used for ink brush, so-called chalk drawing tool There is. This drawing tool is a powder in which a reel wound with a yarn for drawing a straight line is rotatably supported by a shaft standing in the case, and the yarn wound around the reel contains a powder body such as chalk powder. It passes through the storage room and is guided outside the case.

  The drawing work (marking work) using this drawing tool is done by placing the case at one end of the drawing area and pulling out the hook (karuko) tied to the thread that locks into the thread entry / exit of the case. When passing through the powder body storage chamber, chalk powder adheres and comes out of the case. Then, place the hook that is being pulled out on the other end of the drawing range, tension the yarn, lift the yarn upward and release it, the yarn is struck against the drawn surface, and the chalk powder adhering to the yarn is It adheres to the drawing surface and can draw straight lines.

  When the drawing work is finished, the thread drawn out by rotating the handle provided in the case in the winding direction of the thread is wound around the reel in the case. The reel and the handle are connected to each other through a shaft that transmits rotation. Usually, the reel is disposed in the case and the handle is disposed outside the case. In addition, the reel may be isolated from other members in the case. That is, a chamber for storing the reel is provided in the case, and the chamber is arranged in the chamber.

  However, at the time of drawing work (marking work), the hook is pulled out from the case placed at one end of the drawing range by pulling out the hook and reaches the other end of the drawing range. Even if the reel is stopped, the reel that is rotating in the pulling direction by this pulling of the yarn continues to rotate without inertia and the yarn wound around the reel is loosened or jumps out. In particular, when drawing is performed over a long distance, the rotation speed of the reel is increased because the operator moves by running and pulls out the yarn, and the amount of yarn jumping out is considerable.

  And when loosening or jumping out the yarn, turn the handle in the direction of winding the yarn, especially when the yarn jumps out a considerable length from the reel. In some cases, the handle could not be turned. In this situation, the drawing tool had to be disassembled and the thread tangled had to be corrected.

JP-A-2005-213019

  An object of the present invention is to provide a wire drawing tool that can reduce and stop the inertial rotation of a reel caused by drawing a yarn, thereby reducing jumping of the yarn from the reel. .

  In order to solve the above-described problems, a drawing tool according to the present invention includes a case in which a reel around which a yarn is wound is rotatably provided, and the yarn to be wound around the reel is an arbitrary marking coloring member. A drawing tool that is guided out of the case through the housing portion, and is provided with inertia rotation suppressing means for stopping inertia rotation generated in the reel when stopping the withdrawal of the yarn. It is characterized by.

  In addition, the inertia rotation suppressing means is configured using a ratchet device.

  Further, the inertial rotation suppression means is configured such that the contact is intermittently brought into contact with a reel or a rotating body to which the rotation of the reel is transmitted.

  In addition, the contact is in contact with a protruding portion that is formed on the reel and protrudes substantially toward the inner wall surface of the case.

  Further, the protrusion is a blade having an appropriate thickness.

  Note that the case is a main body of a drawing tool, which includes a reel around which a line-quoted thread is wound, and a container for a powdered body such as chalk powder or titanium powder as a marking coloring member. The case is made of a resin material or a metal material.

  The marking coloring member accommodating portion is provided integrally with the case (formed in the case) depending on the shape of the wire drawing tool (for example, the length of the thread wound around the reel), or It is detachable.

  The yarn is made of a material to which a coloring member for marking can be attached, and specifically, a twisted string, a net string, a braided string, or the like made of cotton or nylon material. Also in the colored member for marking, a colored member such as powder or ink is used depending on the marking object or distance. And the accommodating part which accommodates a coloring member is also a structure corresponding to it by the coloring member for marking to be used, for example, the thing using powder bodies, such as chalk powder and titanium powder, can prevent scattering in the case of a powder body It has a special structure, for example, a dedicated powder body storage chamber configured to allow a thread to pass therethrough.

  For those using a powder body such as chalk powder or titanium powder, an appropriate drop is applied to drop the powder body attached to the yarn at the external entrance of the thread in the powder body storage chamber for storing the powder body as the marking coloring member. Means are provided. Further, in the case where the powder body storage chamber and the reel chamber in which the reels are installed are partitioned by a partition wall or the like, a powder body dropping means is provided at the entrance / exit of the thread of the partition wall. In addition, you may provide the discharge part which discharges the powder body accumulated in the case in the desired site | part of a case.

  In addition, the reels are usually operated by manually rotating the reel operation handle to wind the thread pulled out to the outside, but the winding speed is doubled by using speed increasing means such as a planetary gear. You may comprise so that it can wind up twice or more early. And you may wind up using an electric motor etc., and you may supply this power supply using a secondary battery or solar power generation. Further, the reel operation handle may be folded or expanded / contracted.

  And when the inertial rotation suppression means is configured using a ratchet device, it is configured by selecting a commercially available compatible product, or configured exclusively for the main wire pulling tool (for example, to make the pawl abut the gear) Selection of the abutment spring). Further, the pawl itself may have a spring property. For example, all or part of the pawl is formed of spring steel or an elastic material.

  The structure of the ratchet device is not particularly limited, and for example, a structure used for a ratchet wrench may be appropriately modified and used. Further, the material of the pawl and the gear with which the pawl abuts is not particularly limited, and a metal or resin (for example, hard plastic) may be used. Of course, the spring for abutting the pawl on the gear may be made of a suitable material as appropriate.

  In addition, when using a ratchet device that can switch the rotation lock direction (ratchet device for wrench), if the lever that switches the rotation lock direction is configured to be automatically switchable, only the reel rotates when the thread is pulled out. The reel operation handle is in a stopped state, and the reel operation handle can function only when winding the yarn around the reel.

  According to the drawing tool of the present invention, since the reel portion of the drawing tool is equipped with inertial rotation suppression means, when the drawing of the yarn is stopped, the rotation of the reel that continues to rotate with inertia after that is decelerated and stopped. Therefore, the jumping out of the yarn from the reel can be reduced.

  Further, as described above, by gradually slowing down and stopping the reel rotation, for example, when the worker notices that the thread pull-out length is insufficient and immediately starts pulling out the thread, that is, the operator Even when the drawing ring at the tip of the yarn is pulled again, the reel is not completely stopped. Therefore, the force applied to the finger of the operator who pulls the ring can be reduced, and the risk of finger damage can be significantly reduced.

The disassembled perspective view which shows the outline of the internal structure of the wire drawing tool which concerns on this invention. The perspective view which showed the whole drawing tool. The figure which shows an example of an inertia rotation suppression means. The figure which shows processing operation of the lump of the powder body by a blade | wing.

  Hereinafter, a drawing tool according to the present invention will be described based on specific examples shown in the accompanying drawings. FIG. 1 is an exploded perspective view showing an outline of the internal structure of the main wire drawing tool. In FIG. A half case of the pulling tool 1, reference numeral 2 is a reel on which a marking thread (not shown) is wound, and reference numeral 2a is a shaft at the center of the reel 2 connected to the reel operation handle 3. .

  One of the shafts 2a is connected to a ratchet device 4 as inertial rotation suppression means, and in this embodiment, the ratchet device 4 is directly connected to the shaft 2a of the reel 2, but some transmission means You may connect indirectly by interposing.

  Reference numeral 5 denotes a powder body accommodation chamber mounting portion in which a male screw 6 for screwing the powder body accommodation chamber 8 is formed. Reference numeral 7 denotes a handle used when the drawing tool 1 is carried or when the yarn 9 (see FIG. 2) coming out of the case is pressed against the marking surface during the drawing work (marking work). .

  FIG. 2 shows the entire drawing tool, and the yarn 9 with the marking coloring member (not shown) attached in the powder body accommodation chamber 8 of the drawing tool 1 is formed in the powder body accommodation chamber 8. Go outside through the entrance 8a. The thread 9 is provided with a ring 9a so as to be easily pulled out, and the ring 9a also functions to prevent the thread 9 from being drawn into the powder body accommodating chamber 8.

  FIG. 3 shows an example of inertial rotation suppression means, (a) in FIG. 3 shows an example of the structure of the ratchet device 4, and (b) in FIG. 3 shows the contact 4a as a reel. FIG. 3 shows an example of a structure that is configured to intermittently contact the rotating body to which the rotation of 2 is transmitted, and FIG. 3C illustrates a structure in which the contact is configured to intermittently contact the reel. An example is shown.

  As shown in FIG. 3A, the ratchet device 4 has a structure in which a pawl 4b is in contact with a gear 4a connected to the shaft 2a of the reel 2 by a spring 4c. Due to the abutting resistance that abuts against the gear 4a by the spring 4c, the inertial rotation of the reel 2 that occurs when the withdrawal of the yarn 9 is stopped is directed to stop.

  Since the value of the contact resistance of the pawl 4b of the ratchet device 4 can be easily changed by selecting the contact spring 4c or the like, it is possible to easily set the stop time of the reel 2 that rotates by inertia.

  As shown in FIG. 3B, the protrusion 4f of the rotating body 4e to which the rotation of the reel 2 is transmitted, that is, the protrusion 4f of the rotating body 4e connected to the shaft 2a of the reel 2, is transmitted to the contact 4d. In the structure in which the protrusion 4f of the rotating body 4e flips the contact 4d, the inertial rotation of the reel 2 that occurs when the yarn 9 is not pulled out is stopped. Turn it over.

  As shown in FIG. 3 (c), the contact 4d is configured to intermittently contact the reel 2, that is, the blade 2c formed on one side of the reel 2. The inertial rotation of the reel 2 that occurs when the pulling of the yarn 9 is stopped is caused to stop by the rebound resistance when the contact 2d repels the contact 4d. The contact 4d may also be formed of one part or two or more parts, and may be selected according to the installation site. Furthermore, the contact 4d may be provided integrally with a member on which the contact 4d is installed.

  The contact (contact) resistance value of the contact 4d can be easily determined by selecting the material of the contact 4d (elastic strength) and, when a spring is used for contact (contact), this spring. Since it can be changed, it is possible to easily set the stop time of the reel 2 that rotates by inertia. Further, the material of the contact 4d may be formed using a desired material as long as it does not hinder the function. For example, all or part of the contact may be formed of spring steel, metal, or elastic material. .

  When configured as shown in FIG. 3 (c), the powder body entering between the outer surface of the spool 2 side plate 2b of the reel 2 and the case inner wall surface 1c in the half cases 1a and 1b of the case by the blades 2c. The lump 10 (see FIG. 4) of the powdered body that is generated due to moisture or the like can be discharged to the outside from below the thread winding side plate 2b, and the inertial rotation of the reel 2 that is generated when the thread 9 is stopped being pulled out is stopped. Can be directed to.

  FIG. 4 shows the processing operation of the lump 10 of the powder body by the blade 2c. FIG. 4 shows the case where the yarn 9 is pulled out from the case of the drawing tool 1 for performing the drawing work (marking work). At this time, the lump 10 of the powder body generated during storage is crushed by the collision of the blade 2c provided on the outer surface of the thread winding part side plate 2b of the rotating reel 2, and the upper part is scraped off. Then, the wind generated by the blades by sweeping out by the blades or the rotation of the reel is discharged to the outside from the bottom of the spool portion side plate 2b.

DESCRIPTION OF SYMBOLS 1 ... Drawing tool 1a ... Half case 1b ... Half case 1c ... Case inner wall surface 2 ... Reel 2a ... Shaft 2b ... Thread winding side plate 2c ... Blade 3 ... Reel operation handle 4 ... Ratchet device 4a ... Gear 4b ... Pawl claw 4c ... Spring 4d ... Contact 4e ... Rotating body 4f ... Projection 5 ... Powder body accommodation chamber mounting part 6 ... Male screw 7 ... Handle 8 ... Powder body accommodation chamber 8a ... Outlet / entrance 9 ... Thread 9a ... Ring 10 ... Lump of powder body

Claims (5)

  In the case, a reel around which a yarn is wound is rotatably provided, and the yarn wound around the reel is guided to the outside of the case through a receiving portion of an arbitrary marking coloring member. A wire drawing tool characterized by comprising inertia rotation suppressing means for stopping the inertial rotation generated in the reel when the yarn drawing is stopped.   The wire drawing tool according to claim 1, wherein the inertia rotation suppressing means is configured using a ratchet device.   2. The wire drawing tool according to claim 1, wherein the inertial rotation suppressing means is configured such that the contact is intermittently brought into contact with a reel or a rotating body to which rotation of the reel is transmitted.   The wire drawing tool according to claim 3, wherein the contact is in contact with a protruding portion that is formed on the reel and protrudes substantially toward the inner wall surface of the case.   The wire drawing tool according to claim 4, wherein the protrusion has a blade shape with an appropriate thickness.

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