JP6624712B2 - Tool with marking function - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool with a marking function for marking a predetermined portion in order to confirm whether or not tightening has been performed with a predetermined torque.

  When assembling an industrial product or the like, torque adjustment may be necessary for tightening screws and bolts. As a tool used for a tightening operation with torque adjustment, a tool called a torque driver or an impact wrench is widely known.

  Some torque drivers and impact wrenches are provided with a marking function in order to confirm whether a screw or the like is tightened within a predetermined torque. For example, Patent Literature 1 discloses an impact wrench capable of marking a head of an inserted bolt.

  In the impact wrench disclosed in Patent Literature 1, a mark core guide hole for accommodating a mark core for applying ink is provided behind the bolt head insertion hole. The internal space of the bolt head insertion hole and the internal space of the mark core guide hole are in communication. In other words, inside the bolt head insertion hole, an opening of the mark core guide hole through which the mark core extends and retracts is formed at the deep end.

  Then, when the bolt head is inserted into the bolt head insertion hole of the tool with the marking function and tightened with a predetermined torque, when the tightening is completed, the mark core moves in a direction toward the bolt head insertion hole. . With this movement, the mark core projects from the opening of the mark core guide hole and comes into contact with the bolt head. As a result, ink is applied to the top surface of the bolt head, and marking is performed on the bolt head.

  By the way, in the impact wrench of Patent Literature 1, the structure of an oil-based marker (felt pen) is adopted as a structure of a marking portion including a mark core. That is, the mark core is formed of felt, synthetic fiber, synthetic resin, or the like. Not only in Patent Literature 1, but in a tool having a marking function, a felt pen structure is generally employed in a portion to be marked.

JP 2014-100756 A

  By the way, when the tip portion of the felt pen is left unused for a long period of time when not in use, it dries and becomes unusable. In particular, when a highly volatile oil-based ink is used, solidification of the ink at the pen tip becomes more remarkable. For this reason, when the mark core of the impact wrench employing the structure of the felt pen is left unused for a long time while being exposed to outside air, there is a problem that the ink solidifies at the pen tip and becomes unusable.

  In order to solve this problem, the impact wrench disclosed in Patent Literature 1 employs a special ink that forms a coating on the surface of the mark core to suppress evaporation of the ink. Then, a lid for closing the mark core guide hole storing the mark core is separately formed, and is attached when not in use to prevent the mark core from drying.

However, the use of expensive special inks increases the price of the impact wrench and increases the cost every time the ink is filled, which is not preferable from an economic viewpoint.
Further, when the impact wrench is actually used, the user forgets to attach the lid after use, and the mark core may be dried and unusable. That is, in the above-described impact wrench, it is necessary to attach a lid to prevent the mark core from drying, and the user needs to be conscious of attaching the lid after use. This is a burden on the user and leaves room for improvement.

  Therefore, an object of the present invention is to provide a tool with a marking function that can be used continuously without imposing a burden on a user and can be provided at low cost.

The invention according to claim 1 for solving the above-described problem is a tool with a marking function in which, when the object to be tightened is tightened with a predetermined torque, the application body comes into contact with the object to apply the application liquid, An application body portion including the application body, and an application liquid storage unit for storing the application liquid has an application unit integrally formed, and the entire application unit toward the application target An application unit drive mechanism for moving the application unit; the application unit is a ballpoint pen refill; the application body unit is formed by a ball and a ballpoint pen tip having a chip body holding the ball; and the application unit is pulled out from the outside. the can be separated, securable by pushing from the outside, the ball is pressed, from the gap formed between the ball and the tip body, even the ink flows dripping to the outside , And the said coating solution is a marking function tool, characterized in that those small or no thixotropic.

The inventors of the present invention have conducted intensive studies to solve the above-described problems. As a result, the structure in which the coating liquid is not supplied to the application body when not in use is compared with the structure in which the coating liquid is constantly supplied to the application body. It has been found that it is preferable to reduce the deterioration of the applied body. Then, the coating liquid was supplied to the coating body only at the time of use, and the structure that can be manufactured at low cost was verified. As a result, the structure of the ballpoint pen tip was adopted.
The tool with the marking function of the present invention employs a ballpoint pen tip structure in the application body, and when not in use, the opening for supplying the application liquid to the ball as the application body is closed by the ball itself. Will be done. That is, the ball of the ball-point pen tip acts as a lid that automatically seals the coating solution storage section. Thus, the coating liquid is not supplied to the coating body when not in use, and the coating liquid does not continue to dry and evaporate in the portion of the coating body, so that the drying of the coating liquid on the coating body can be suppressed. That is, functional deterioration due to drying of the coating liquid can be largely suppressed.
In addition, when a ballpoint pen tip structure is adopted for the application body, the application liquid can be applied to the application target without impregnating the application body with the application liquid. This also makes it possible for the applied body to be harder to dry as compared with the conventional applied body formed of felt, synthetic fiber, synthetic resin, or the like.
In other words, the tool with the marking function of the present invention is capable of applying the coating liquid without impregnating the coating body with the coating liquid, and has a structure in which the coating liquid container is automatically sealed when not in use. Occasionally, it is possible to suppress the drying of the application liquid on the application body without attaching a lid. Therefore, the user does not need to be aware of the mounting of the lid, and can use the lid easily.

Furthermore, since the tool with a marking function of the present invention employs the structure of a ballpoint pen tip as the application body as described above, the application body can be manufactured at low cost. For this reason, when filling up the used-up coating liquid, the cost is not so high even if the coating liquid storage section is replaced with the coating body.
That is, in the tool with the marking function of the present invention, the application body and the application liquid storage section are formed integrally, and the entire application body can be replaced when the application liquid is filled. This eliminates the necessity of separating the application body and the application liquid storage section in the operation of filling the application liquid, so that the operation of filling the application liquid can be easily performed. In other words, it is possible to reduce the burden on the user in replacing the application liquid.
Furthermore, since a new application body is used each time the application liquid is filled, even if the application body is slightly deteriorated, replacement is performed before the application body is completely deteriorated until it becomes unusable. It will be. Therefore, it is possible to prevent the problem that the application body is completely deteriorated and the tool with the marking function cannot be used.

  A related invention related to the present invention is a tool with a marking function for applying an application liquid by contacting an application object with an application object when the object to be tightened is tightened with a predetermined torque. A coating liquid storage unit for storing a liquid, a coating unit driving mechanism for moving the coating body toward the object to be tightened, and a valve mechanism including a pressing member; A path for supplying the coating liquid to the body is opened and closed, and the pressing member is urged to maintain a closed state, and the coating body is in contact with an object to be coated. And a ring member that is elastically deformable. The main body portion has an annular concave portion that is disposed inside the outer cylinder portion and that extends in a ring shape and is recessed from the periphery. The ring member is attached to the annular recess. The time of the closed state, a marking function tool, characterized in that said ring member in contact with elastically deforming the inner portion of the outer cylindrical portion.

  A tool with a marking function according to a related invention includes a valve mechanism between an application body and the application liquid storage unit, and can open and close a path for supplying the application liquid from the application liquid storage unit. The valve mechanism is urged by the pressing member so that the closed state is maintained. Therefore, when not in use, the supply of the coating liquid from the coating liquid storage unit to the coating body is automatically shut off, and the coating liquid is not supplied to the coating body. This makes it possible to suppress drying of the coating liquid on the coating body when not in use.

According to a second aspect of the present invention, the distal end portion has a shaft portion that can be engaged with a screw, and the application body is located on a side of the shaft portion, and is disposed in an axial direction of the shaft portion. The tool with a marking function according to claim 1, wherein the tool moves along.
In the present invention, the coating liquid has little or no thixotropic property .

  The tool with a marking function of the present invention preferably has such a configuration.

A related invention of the present invention is a tool with a marking function for applying a coating liquid by contacting an application object with the application object when the object to be tightened is tightened with a predetermined torque. A coating liquid storage unit for storing the coating liquid, an application unit having an application unit integrally formed, and a coating unit driving mechanism for moving the entire application unit toward the coating target object, The application section is a ballpoint pen refill, the application body section is formed by a ball and a ballpoint pen tip having a chip body holding the ball, the application section can be separated by pulling out from the outside, from the outside securable by pushing, when the ball is pressed, from the gap formed between the ball and the tip body, which ink flows dripping to the outside, pressurize the coating liquid A feature and be luma Kingu function tool that includes a pressure mechanism.

According to such a configuration, it is possible to forcibly discharge the application liquid by applying pressure. For this reason, even if the portion serving as the discharge port of the coating liquid is open upward, the coating liquid can flow upward against the gravity.
To describe in detail, for example, when tightening a tightening object located on the upper side, the posture of the tool with the marking function may be upside down as compared to a case where the tightening object located on the lower side is tightened. is there. In this case, the portion serving as the discharge port of the application liquid that has been opened downward when the lower fastening target object is fastened is opened upward. Here, when the portion serving as the discharge port of the coating liquid is open upward, it is necessary to flow the coating liquid in a direction against gravity, and it becomes difficult for the coating liquid to flow.
In view of this, the tool with a marking function of the present invention is configured to include a pressurizing mechanism so that the application liquid can be forcibly flowed toward a portion serving as a discharge port. This makes it possible to smoothly flow the coating liquid even when the coating liquid flows in a direction against gravity. Thus, the coating liquid can be stably supplied to the coating body regardless of the posture of the tool with the marking function, and marking can be performed reliably.

ADVANTAGE OF THE INVENTION According to this invention, the drying of the coating liquid in a coating body can be suppressed and the burden on the user in the replacement | exchange operation of a coating liquid can be reduced. Further, it is possible to prevent the problem that the coated body is deteriorated until it cannot be used, and the tool with the marking function itself cannot be used. Thus, continuous use is possible without imposing a burden on the user.
According to the present invention, a tool with a marking function can be provided at low cost.

It is a perspective view showing the torque driver concerning the embodiment of the present invention. It is a side view which shows the core of FIG. It is sectional drawing which shows the ball-point pen tip of FIG. It is a figure which shows the front-end | tip part of the ball-point pen tip of FIG. 1, (a) is sectional drawing which shows the state cut | disconnected in the surface parallel to an axial direction, (b) was cut | disconnected in the AA plane of (a). It is sectional drawing which shows a state. 2A and 2B are explanatory diagrams illustrating a marking operation performed by the torque driver of FIG. 1, wherein FIG. 1A illustrates a state where a core body is located at a rear end side, and FIG. 2B illustrates a state where the core body moves from a state of FIG. It shows the state where it was done. FIGS. 2A and 2B are explanatory diagrams showing a ballpoint pen tip during a marking operation performed by the torque driver of FIG. 1, wherein FIG. It shows the state pushed into the side. It is sectional drawing which shows the pen tip part of the core body which concerns on embodiment different from FIG. It is sectional drawing which shows the outer cylinder part of FIG. FIG. 8 is an exploded perspective view illustrating the application body forming unit in FIG. 7. It is explanatory drawing which shows the front-end | tip part of the application body formation part different from FIG. 7, (a) and (b) show the front-end | tip part of a different shape, respectively. It is a perspective view which shows the torque driver which concerns on embodiment different from FIG. It is explanatory drawing which shows the marking operation | movement which the torque driver of FIG. 11 performs, (a) shows the state in which a core body is located in the back end side, (b) moves the core body from the state of (a) to the front end side. It shows the state where it was done. It is explanatory drawing which shows the marking operation | movement which the torque driver which concerns on embodiment different from FIG.1 and FIG.11 performs, and shows a mode that a core body moves to a front-end | tip side in order of (a)-(c). It is explanatory drawing which shows the marking operation | movement which the torque driver which concerns on embodiment different from FIG.1, FIG.11, FIG.13 shows that the core body moves to a front-end | tip side in order of (a)-(c). . FIG. 4 is a cross-sectional view showing a pressurized core that can be employed in the torque driver according to the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the “front and rear” relationship is described with the front end of the driver as the front side and the grip side as the rear side.

  As shown in FIG. 1, the torque driver 1 (tool with a marking function) of the present embodiment includes a grip portion 2, a torque adjusting portion 3, a bit attaching portion 4, and a marking portion 5. The bit 6 (shaft portion) selected from a plurality of types is fixed to the bit mounting portion 4 in a replaceable manner.

The torque driver 1 engages the tip of the bit 6 with a tightening target such as a screw or a bolt, grips the grip portion 2 and rotates in the tightening direction, thereby tightening the tightening target. Tightening work is possible.
Then, when the tightening operation is started and the tightening is performed with a predetermined torque, the core body 7 (applying portion) of the marking unit 5 moves to the front end side (downward in FIG. 1). As a result, the tip of the core body 7 comes into contact with the object to be tightened or a portion in the vicinity thereof, and marking is performed.

  The grip portion 2 is a portion to be gripped by a user, and has non-slip irregularities formed on an outer surface. Further, a part of the torque adjustment unit 3 is incorporated inside the grip unit 2.

The torque adjusting section 3 has a memory section 8 exposed to the outside, and a torque adjusting mechanism (not shown) built in the grip section 2 and the main body.
The torque adjusting mechanism includes a main shaft portion integrally fixed to the inside of the grip portion 2, a connecting portion connected to the main shaft portion and the bit mounting portion 4, and a main shaft portion when tightened with a torque set in the memory portion 8. On the other hand, a torque limiter for idling the connecting portion is provided.

  The mechanism for detecting that the tightening torque has reached a predetermined value may be a spring-type mechanism using a spring, and an electric type that detects a distortion of the sensor plate during tightening by providing a sensor plate having a strain gauge. Or an air type using air pressure.

  The marking unit 5 has a core 7 and a core operating unit (coating unit driving mechanism, not shown).

  The core body 7 employs a ball-point pen refill structure in which a ball-point pen tip 9 (application part) and an ink storage tube 10 (application liquid storage part) are integrated. Details of the core 7 will be described later.

The core body operating section includes a core body holding section (not shown) for holding a rear end (or an intermediate portion) of the core body 7, and this core body holding section is connected to the torque adjusting section 3 via a cam. Are linked. That is, the core holding unit can be interlocked with the torque adjusting unit 3.
More specifically, when tightened with the torque set in the memory section 8, the core body holding section moves to the front side, and the distal end portion of the core body 7 moves to the front side.

  The bit 6 is processed into various shapes, such as a tip having a plus driver, a minus driver, and a hexagonal driver. In the torque driver 1 of the present embodiment, various types of tightening objects are selected by selecting a bit 6 having a shape according to the shape of the tightening object such as a screw or a nut and fixing the bit 6 to the bit mounting portion 4. Can be tightened.

  Next, the core 7 employed in the torque driver 1 of the present embodiment will be specifically described.

  As shown in FIG. 2, the core body 7 is formed by fixing a ballpoint pen tip 9 to one end (front end) of an ink storage tube 10 capable of storing ink (coating liquid) therein.

  As shown in FIG. 3, the ballpoint pen tip 9 has a structure including a tip body 15, a ball 16 (applying body), and a biasing member 17.

  The tip body 15 has a front end portion 20 that is a substantially conical cylindrical body and a substantially cylindrical rear end portion 21 that are integrated.

  As shown in FIG. 4, the distal end portion 20 is provided with a distal bent portion 25 formed by bending the distal end inward. A ball house 27 for supporting the ball 16 is formed inside the bent end portion 25 and the vicinity thereof, and a center hole 28 is formed further behind the ball house 27.

The ball house 27 is a space surrounded by the side wall surface 32, the connection surface 33, and the seat surface.
The side wall surface 32 is a surface that forms the inner peripheral wall of the distal bent portion 25, and intersects the connection surface 33 substantially perpendicularly. The connection surface 33 is located between the side wall surface 32 and the seat surface 34, and one end side in the radial direction is continuous with the side wall surface 32, and the other end side is continuous with the seat surface 34. The seat surface 34 is a surface with which the ball 16 contacts when ink is applied, and is formed by striking the ball 16.

Here, as shown in FIG. 4, an arrow groove 36 is formed in a portion located outside the center hole 28.
The arrow groove 36 is provided between the ball house 27 and a space located rearward (see FIG. 3 and the like), and extends along the axial direction. In other words, the groove communicates the ball house 27 with the space located behind. In the present embodiment, three arrow grooves 36 are formed, and the three arrow grooves 36 are separated from each other in the circumferential direction.

  As shown in FIG. 3, the rear end side portion 21 is formed of a large diameter portion 21a having a relatively large diameter and a small diameter portion 21b located behind the large diameter portion 21a. It is continuous with the small diameter portion 21b via a step. The small diameter portion 21b is a portion that is inserted inside the ink storage tube 10 when the small diameter portion 21b is connected to the ink storage tube 10.

  The ball 16 is rotatably held with a part thereof exposed to the outside.

  As shown in FIG. 3, the urging member 17 includes a coil spring-shaped main body 17a and a rod 17b extending from the main body 17a. One end of the rod portion 17b is continuous with the main body portion 17a, and the other end is in contact with the ball 16. The biasing member 17 is attached to the rear side of the ball 16 and is in a state of constantly biasing the ball 16.

  The ink storage tube 10 has an elongated cylindrical shape, and has a state in which ink is stored inside. Inside the ink storage tube 10, a portion closer to the rear end than the portion where the ink is stored is filled with a grease-like filling plug (not shown). That is, the ink storage tube 10 has a structure capable of preventing the evaporation of the ink from the open rear end portion.

  Next, the operation of the torque driver 1 of the present embodiment will be described. In the following description, a tightening operation of tightening a screw (an object to be tightened or an object to be coated) having a cross-shaped groove in the head by a bit 6 whose tip portion is a Phillips screwdriver will be described as an example. .

  The memory unit 8 is operated in advance, and the memory is adjusted to a target torque value. Thereafter, as shown in FIG. 5 (a), the tip of the bit 6 is engaged with the head of the screw, and the screw is tightened by rotating the torque driver 1 in the tightening direction.

  When tightening is performed with a predetermined torque, the torque limiter causes the connecting portion connected to the main shaft portion and the bit mounting portion 4 to idle with respect to the main shaft portion fixed integrally inside the grip portion 2. In this state, even if the grip portion 2 is gripped and the torque screwdriver 1 is turned, the screw is not further tightened, and it is possible to prevent an excessive torque in the tightening operation.

  Further, when the tightening is performed with a predetermined torque, the core holding unit that holds the core 7 moves to the front end side (front side) in conjunction with the torque adjustment unit 3. Thereby, as shown in FIG. 5B, the tip of the core body 7 comes into contact with the head of the screw.

  In this state, the ball 16 attached to the distal end portion of the core 7 is pressed against the head of the screw by further moving the core 7 toward the distal end side. Then, as shown in FIG. 6, the ball 16 attached to the tip of the core 7 receives a reaction force from the head of the screw and is pressed rearward. Then, as shown in FIG. 6B, a gap is formed between the distal bent portion 25 and the ball 16.

  More specifically, when the ball 16 is not in contact with the application target, the urging member 17 constantly urges the ball 16 toward the distal end, and as shown in FIG. Thus, the ball 16 is in close contact with the distal end portion of the distal bent portion 25 without any gap. For this reason, the ball house 27 is sealed from the outside.

On the other hand, when the ball 16 is pressed to the rear end side, the ball 16 moves rearward against the urging force, and as shown in FIG. A gap is formed between the ball housing 27 and the tip end portion, and the ball house 27 communicates with the outside.
Here, as described above, the ball house 27 is a space located rearward through the center hole 28 and the like, that is, a space that is continuous with the internal space of the ink storage tube 10. For this reason, when a gap is formed between the ball 16 and the distal end portion of the distal bent portion 25, the space in which the ball house 27 and the internal space of the ink storage tube 10 are continuously formed becomes the external space. It becomes a continuous state. In other words, the internal space of the core 7 is continuous with the outside. As a result, the ink stored in the ink storage tube 10 flows toward the ball house 27, and the ink is supplied to the balls 16. In this state, the ball 16 comes into contact with the head of the screw as the application target, and the ink is applied to the application target. That is, the ink drips to the outside from the gap formed between the ball 16 and the distal end portion of the distal bent portion 25, and adheres to the head of the screw.

  As described above, in the present embodiment, when the ball 16 is not used, the internal space of the core 7 is sealed from the outside, and the internal space of the core 7 communicates with the outside during the marking operation. In other words, the ball 16 acts as a valve for switching between the closed state and the communicating state of the inner space of the core 7. Thus, it is possible to suppress the drying of the ink on the application body without the ink being continuously supplied to the application body when not in use.

Further, in the present embodiment, the core 7 is configured to be able to protrude from the core body protruding hole 38 (see FIG. 1) opened on the distal end side, and the core 7 is configured to be replaceable from the outside.
In other words, the core 7 can be replaced simply by pulling out the core 7 from the core projection hole 38 and separating it, pushing a new core 7 into the core projection 38 and fixing it to the core holding portion. ing. This eliminates the necessity of disassembling the part fixing the core 7 during the replacement of the core 7, thereby simplifying the replacement.

  Although not particularly limited, the ink stored in the ink storage tube 10 is preferably one having a small or no so-called thixotropic property from the viewpoint of stably supplying the ink to the application body. That is, it is preferable that there is little or no change in fluidity between the stirred state and the stationary state.

In the above-described embodiment, the example in which the ball 16 contacting the application target functions as a valve, that is, the example in which the ball 16 functions as a valve that switches between a sealed state and a communicating state of the internal space of the core body 7 has been described. Is not limited to this.
For example, as shown in FIG. 7, an applicator tip 109 (applying body portion) provided with a portion (valve mechanism) functioning as a valve on the rear end side of a portion that comes into contact with the application object may be employed. Good. The structure of the applicator tip 109 will be described in detail below.

  The applicator tip 109 is fixed to one end of the ink reservoir 10 (not shown in FIG. 7), and the internal space of the applicator tip 109 and the internal space of the ink reservoir 10 are continuous. It is an integrated space. That is, the applicator tip 109 has a structure in which the ink stored in the ink storage tube 10 can be ejected from the distal end opening 110 and applied to the application target.

  The applicator tip 109 has a structure including an outer cylindrical portion 115, an applicator forming section 116 (applicator), and a coil spring-shaped urging member 117 (pressing member).

  As shown in FIG. 8, a space is formed inside the outer cylinder part 115. This space is formed between the front end opening 110 formed at the front end and the rear end opening 120 formed at the rear end, and penetrates the outer cylinder 115.

  In the vicinity of the distal end opening 110, the outer cylindrical portion 115 is formed such that the inner diameter becomes narrower toward the distal end side. More specifically, two tapered surfaces having different angles are formed near the distal end opening 110. That is, a first tapered surface 121 located on the distal end side and connected to the distal end opening 110 and a second tapered surface 122 located on the rear side of the first tapered surface 121 and connected to the first tapered surface 121 are formed. I have.

  The first taper surface 121 has a smaller taper angle than the second taper surface 122, and is a steeper inclined surface. For this reason, the boundary portion 125 between the first tapered surface 121 and the second tapered surface 122 is a protruding portion protruding inward.

  As shown in FIG. 9, application body forming section 116 is formed by fitting ring member 132 into annular recess 137 of main body 130 and fixing it.

  The main body 130 has a distal projection 135 that is rounded and convex on the distal side, a conical portion 136 located behind the distal projection 135, and an annular recess that is recessed from the periphery and extends continuously in an annular manner. 137, a columnar section 138, and a rod section 139 smaller in diameter than the columnar section 138 are integrally formed.

  The tip projection 135 is a projection having a hemispherical shape at the tip end, and is a portion that comes into contact with the application target.

  The conical portion 136 is a portion formed to have a smaller diameter toward the distal end. The taper angle of the conical portion 136 is the same (or substantially the same) as the taper angle of the first tapered surface 121 (see FIG. 8). That is, when the conical portion 136 is pressed against the first tapered surface 121 from the rear side, the conical portion 136 is formed to be in surface contact.

The annular concave portion 137 has a shape into which the ring member 132 is fitted almost exactly, and has a circular cross section when cut along a plane perpendicular to the circumferential direction. Here, the curvature of the arcuate portion is the same (or substantially the same) as the curvature of the surface of the ring member 132.
For this reason, when the ring member 132 is mounted in the annular concave portion 137, the surface of the ring member 132 and the annular concave portion 137 come into surface contact with each other and come into close contact (see FIG. 7).

  The columnar portion 138 is a portion where the distal end side of the urging member 117 contacts, and is a portion formed thicker than the rear side portion (see FIG. 7).

  The rod portion 139 is a portion to be inserted inside the urging member 117, and has an outer shape of a round bar (see FIG. 7).

  The ring member 132 is an O-ring made of rubber that can be elastically deformed, has a substantially circular cross section, and extends annularly.

  Here, as shown in FIG. 7, the applicator tip 109 has an applicator forming portion 116 formed by fitting the ring member 132 into the annular concave portion 137, and is disposed inside the outer cylindrical portion 115. The application body forming section 116 is constantly pressed toward the distal end by the urging member 117.

  At this time, the radial end of the ring member 132 is located outside the end of the main body 130 in the same direction. That is, the ring member 132 is in a state of being raised from the main body 130 so as to protrude outward.

  Further, the tip projection 135 projects outward from the tip opening 110, and the conical portion 136 is in surface contact with the first tapered surface 121. Then, the ring member 132 and the second tapered surface 122 are in close contact with each other.

  That is, in the applicator tip 109, the internal space is sealed at two places, a part where the conical part 136 and the first tapered surface 121 are in surface contact, and a part where the ring member 132 and the second tapered surface 122 are in close contact. It has a structure to do. According to such a structure of sealing at a plurality of places, airtightness can be further improved.

  Further, since the ring member 132 is an elastically deformable member, when the ring member 132 is pressed against the second tapered surface 122, the ring member 132 is elastically deformed in accordance with the contacted second tapered surface 122. As a result, the ring member 132 and the second tapered surface 122 are in close contact with each other without any gap, so that high airtightness can be exhibited.

The tip 109 of the applicator also comes into contact with the object to be coated, and the applicator forming section 116 is pressed backward, so that the conical section 136 and the first tapered surface are pressed. A gap is formed between the ring member 121 and the ring member 132 and the second tapered surface 122, so that application is possible. That is, when not in use, the internal space is sealed from the outside, and during the marking operation, the internal space and the outside are in communication. Thus, it is possible to suppress the drying of the ink on the application body without the ink being continuously supplied to the application body when not in use.
The main body 130 is a hard member made of a resin or a metal material, and can apply ink without impregnating the tip protrusion 135 with ink.

In the applicator tip 109, the conical portion 136 is configured to be in surface contact with the first tapered surface 121, but the present invention is not limited to this. The shapes of the main body 130 and the first tapered surface 121 may be appropriately changed.
For example, as shown in FIG. 10A, an application body forming portion 147 having a pyramid-shaped portion 146 instead of the conical portion 136 may be used. Further, as shown in FIG. 10 (b), a coating body forming section 148 having a substantially triangular cross section and extending in the thickness direction (the direction orthogonal to the length direction) may be used. That is, the planar inclined surfaces 149 may be provided at positions facing each other.

The pen tip portion employed in the present invention may function as a valve at a portion that comes into contact with the application target, such as the above-mentioned ballpoint pen tip 9, and comes into contact with the application target, such as the application tool tip 109. The rear side of the portion may function as a valve. It is sufficient that the space storing the ink is automatically closed when not in use, and the ink is not continuously supplied to the portion in contact with the application target.
Further, the hermetically sealed portion may be provided at one place like the above-mentioned ball-point pen tip 9, or the hermetically sealed portion may be provided at two places like the applicator tip 109. That is, a structure that seals at one place or a structure that seals at a plurality of places may be used. However, a structure in which a plurality of locations are closed is preferable because airtightness can be improved.

  In the above-described embodiment, an example in which the core body 7 is moved along the bit 6 has been described, but the present invention is not limited to this. For example, as in a torque driver 160 (tool with a marking function) shown in FIGS. 11 and 12, the core 167 (application portion) may be configured to protrude in an oblique direction.

  The torque driver 160 has a structure in which the tip of the core 167 approaches the bit 6 as the core 167 moves in a direction approaching the tightening target. That is, the core 167 projects from a position radially away from the bit 6, and the direction of movement of the core 167 is a direction inclined with respect to the longitudinal direction of the bit 6.

  Further, as shown in FIG. 13, a movement regulating member 178 for regulating the moving direction of the core 177 (application portion) may be provided so that the core 177 moves along an arc-shaped trajectory.

  The movement restricting member 178 has a movement restricting groove 179 that is at least partially curved and extends in an arc shape, and the leading end opening of the movement restricting groove 179 is closer to the bit 6 than the rear end portion of the movement restricting groove 179. Is formed. That is, the movement restricting groove 179 is a groove having a portion bent in a direction approaching the bit 6.

  Further, the ink storage tube 10 of the core body 177 is formed of a flexible member such as a resin, and is in a state of being elastically deformable. Then, the core body 177 is inserted into the movement regulating groove 179 from the rear end side.

  Thus, when the core 177 moves toward the distal end, the movement is restricted by the movement restricting groove 179, and the distal end of the core 177 approaches the bit 6. That is, the ink storage tube 10 of the core 177 is curved along the movement regulating groove 179, and the core 177 extends while being curved.

In the above-described embodiment, an example has been described in which the head of a screw that is a fastening target is marked, but the present invention is not limited to this. Marking may be performed on a member or wall surface located around the screw. That is, the object to be tightened and the object to be applied may be the same or different. In the above-described embodiment, an example in which the tips of the cores 167 and 177 move in the direction approaching the bit 6 has been described, but the present invention is not limited to this. It may move in a direction away from the bit 6.
That is, a torque driver 185 (a tool with a marking function) as shown in FIG. 14 may be used.

  The torque driver 185 is provided with a movement restricting protrusion 187 that protrudes radially outward. The movement restricting projection 187 is formed in front (front end side) of the core body 188 in a state where the core body 188 (application portion) is located at the rearmost end side (a state shown in FIG. 14A). . That is, when the core body 188 moves straight toward the distal end, the movement restricting projection 187 is formed on the straight path. In other words, when the core body 188 goes straight, the movement restricting projection 187 is positioned so as to close the course. The movement restricting projection 187 has a rounded and convex shape.

  The ink storage tube 10 of the core body 188 is also formed of a flexible member such as a resin, and is in an elastically deformable state.

For this reason, when the core 188 moves straight, the tip of the core 188 comes into contact with the movement restricting projection 187 from the rear side. Then, when the core body 188 tries to move straight, the tip of the core body 188 moves along the surface of the movement restriction protrusion 187, and is positioned outside the movement restriction protrusion 187 (FIG. 14B). reference). In this state, when the core body 188 further moves to the distal end side, the movement regulating protrusion 187 comes into contact with the ink storage tube 10 from the inside as shown in FIG. As a result, the ink storage tube 10 is bent outward, and the leading end of the core body 188 is located outside the state located at the most rear end side (the state shown in FIG. 14A). It becomes.
Then, the tip portion of the core body 188 comes into contact with the surface (application target) of the wall to which the screw is tightened, and marking is performed.

In the above-described embodiment, an example has been described in which one core body is provided and protruded from the torque driver, but the present invention is not limited to this.
For example, a configuration may be adopted in which a plurality of cores are provided and each of them projects from a different position. That is, a structure may be adopted in which the core for performing the marking operation can be switched and the marking position can be changed.

  In the embodiment described above, an example in which the present invention is applied to a torque driver has been described, but the present invention is not limited to this. For example, a torque adjustment mechanism such as an impact driver or an impact wrench may be linked to the core operating unit of the above embodiment. That is, the tool with a marking function of the present invention may be an impact driver or an impact wrench. Any tool can be used as long as it can tighten the object to be tightened with a predetermined torque.

  In the above description, an example has been described in which the screw is tightened with the tip of the bit 6 facing downward. However, when the user actually uses the torque driver 1, there are cases where the bit 6 is used with the tip of the bit 6 facing upward or the bit 6 is kept horizontal. That is, not only the state where the torque screwdriver 1 is positioned above the screw (see FIG. 5), but also the state where the torque screwdriver 1 is positioned below the screw or the state where the torque screwdriver 1 is positioned beside the screw. Work may be carried out. For this reason, the torque driver 1 is used in various postures.

Here, when the bit 6 is used with the tip thereof facing upward, the tip of the core body 7 also faces upward. At this time, it is conceivable that the ink is less likely to be ejected than when the tip of the core body 7 is directed downward. That is, when the tip of the core 7 is upward, the ink tends to flow downward due to the action of gravity, so that it is difficult for the ink to flow upward where the tip of the core 7 is located. As a result, the ink may not be stably ejected from the tip of the core body 7. That is, when the tip of the core 7 is not downward, it is conceivable that the ink is difficult to be ejected from the tip of the core 7.
In addition, when the tip of the core 7 is directed upward, air may flow into the ink storage tube 10 from the tip of the core 7 and the ink may flow backward.

  For this reason, it is preferable that the tool with a marking function of the present invention has a structure capable of pressurizing the application liquid. In other words, it is preferable that the ink be forcibly ejected by applying pressure so that the ink can be ejected smoothly irrespective of the posture of the core body and the backflow of the ink is prevented. This is described in more detail below.

  As a structure for pressurizing the application liquid, for example, a structure using a pressurized core 190 instead of the above-described core 7 may be adopted.

As shown in FIG. 15, the core body 190 fills the inside of the ink storage tube 193 (coating liquid storage part) with ink, and further, from the rear end side, a lubricant, a sealing agent, a backflow preventing agent, etc. This is a portion indicated by reference numeral 195, and is also simply referred to as a lubricant or the like 195).
Then, the pressing piece 196 and the spring 197 are inserted from the rear end side of the lubricant 195 and the tail plug 198 is attached to the rear end portion of the ink storage tube 193.

  As a result, in the internal space of the ink storage tube 193, the ink, the lubricant 195, the pressing piece 196, and the spring 197 are arranged in this order from the front end side (ball pen tip 9 side) to the rear end side. The lubricant 195, the pressing piece 196, and the spring 197 function as a pressurizing mechanism that constantly pressurizes the ink. That is, the pressure mechanism is a mechanism formed integrally with the ink storage tube 193.

  At this time, on the rear end surface (the upper end surface in FIG. 15) of the tail plug 198, a vent hole 200 communicating the inside and the outside is provided at the center thereof. That is, the vent hole 200 is a through hole that penetrates a portion forming the rear end surface (the upper end surface in FIG. 15) of the tail plug 198 in the length direction of the ink storage tube 193.

The front end of the tail plug 198 is inserted into the ink storage tube 193, and the rear end of the spring 197 is in contact with the front end surface of the tail plug 198. According to such a configuration, the contraction amount of the spring 197 can be adjusted only by adjusting the insertion length of the tail plug 198 into the ink storage tube 193.
That is, when the insertion length of the tail plug 198 is increased, the spring 197 is arranged in a more contracted state. On the other hand, if the insertion length of the tail plug 198 is shortened, the spring 197 will be disposed in a state of being extended longer. In other words, the above configuration facilitates setting of the contraction amount and the arrangement position of the spring 197.

  In addition, when the pressurizing mechanism for pressurizing the ink is provided as described above, it is preferable that the so-called thixotropic property is relatively large, unlike the case where the pressurizing mechanism is not provided. That is, it is preferable that the change in fluidity between the agitated state and the stationary state is relatively large.

  Further, the pressing mechanism of the present invention is not limited to a pressing mechanism that presses ink from the rear end side by an elastic member (spring 197), and may have a structure without an elastic member. As such a structure, for example, a pressurizing mechanism may be provided in which an outer cylinder for enclosing the core and compressed air is provided, and the ink is pressurized by the enclosed compressed air.

1,160,185 Torque screwdriver (tool with marking function)
7,167,177,188,190 Core body (coating part)
6 bits (shaft)
9 Ballpoint pen tip (coating part)
10,193 Ink storage tube (coating liquid storage section)
16 balls (coated body)
109 Tip for applicator (applying body)
116 Coating body forming section (Coating body)
117 urging member (pressing member)

Claims (2)

When the object to be tightened is tightened with a predetermined torque, the application body comes into contact with the object to be applied, and in a tool with a marking function for applying the application liquid,
An application body portion including the application body, and an application liquid storage unit for storing the application liquid has an application unit integrally formed, and the entire application unit toward the application target Equipped with a coating unit drive mechanism to move,
The application unit is a ballpoint pen refill,
The coating body portion is formed by a ball and a ballpoint pen tip having a chip body holding the ball,
The application section is separable by pulling out from the outside, and can be fixed by pushing in from the outside,
When the ball is pressed, the ink drips to the outside from the gap formed between the ball and the chip body, and the coating liquid has a small or no thixotropic property. Tool with marking function. The tip portion has a shaft portion that can be engaged with the screw,
The tool with a marking function according to claim 1, wherein the application body is located on a side of the shaft body portion and moves along an axial direction of the shaft body portion.

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