JP5519418B2 - Marker and fastening tool provided with the same - Google Patents

Description

  The present invention relates to a marker for displaying that a fastening tool such as a torque wrench has fastened a bolt, and a fastening tool including the marker.

  2. Description of the Related Art Conventionally, in a device that requires a large number of bolts, work efficiency is improved by clarifying the distinction between bolts that have been fastened and unfastened bolts at the time of fastening work for fastening bolts. Therefore, it is desirable to mark the bolts that have been fastened with a marker or the like.

  For this reason, for example, Patent Documents 1 and 2 are provided with a marker provided with a storage body inside the ratchet cylinder, and with a marker that turns the toggle mechanism built in the torque wrench when the tightening torque of the bolt reaches a predetermined value. A torque wrench is described. In this torque wrench, when the toggle mechanism rotates, the head rotates around the axis, and the marker is pushed down through the link connected to the head and pressed against the tip of the bolt, so that the screw tightening is performed. Marking is made indicating completion.

  Patent Document 3 describes a torque wrench in which a marker (stamp) is provided above a socket, and when a torque applied to a bolt reaches a predetermined value, a Berg link rotates through a connecting line. In this torque wrench, when the Berg link rotates, the marker moves toward the socket via a pivot connected to one end of the Berg link, and marking is performed by contacting the tip of the nut.

  However, in the torque wrench described in Patent Documents 1 and 2, if the contact surface of the marker that contacts the bolt is in a dry state, it takes time for the marker liquid to penetrate into the contact surface before marking. For this reason, there is a problem that when the fastening operation is started before the penetration, the marking is not performed although the fastening of the bolt is completed.

  Further, in any torque wrench described in any patent document, the marker can be moved from the initial position toward the bolt. However, if the bolt head is located outside the movement range of the marker, the bolt may be fastened. There was a problem that it could not be marked.

Japanese Patent No. 3633966 Japanese Patent Laid-Open No. 8-90442 Utility Model Application Publication No. 45-23278

  The present invention has been made in view of the above-mentioned conventional problems, and by reliably supplying the marker liquid to the contact surface of the marker with the bolt, it is possible to prevent marking defects when the bolt is fastened. It is an object of the present invention to provide a marker capable of marking when a bolt is fastened in any shape and a fastening tool including the marker.

In order to solve the above problems, the marker of the present invention is:
A marker body having an insertion hole, one end opened and the other end closed, a valve slidably in contact with the inner peripheral surface of the marker body, and an axially movable one opening end of the insertion hole An applied body, a marker liquid storage section filled with a marker liquid to be supplied to the applied body, and a valve spring that urges the applied body outward through the valve,
The application body and the marker liquid are arranged so that the marker liquid flows out when the application body moving in the axial direction against the urging force of the valve spring presses the marker liquid storage section via the valve. Rutotomoni provided a flow path for communicating the reservoir, is provided with a sealing member for sealing the flow path.

  With the above configuration, the application body moves toward the marker liquid storage unit against the urging force of the valve spring when it comes into contact with the member to be fastened, so that the marker liquid storage unit is pressed through the valve to cause the marker liquid to flow out. Since the marker liquid can be reliably supplied to the application body by reaching the application body through the flow path that connects the application body and the marker liquid storage unit, it is possible to prevent the marking member from being defectively marked. Can be prevented.

As one specific means, the channel is
A first flow path that is provided between the inner peripheral surface of the marker body and the valve and through which the marker liquid flowing out from the marker liquid storage section passes, and the marker liquid that has passed through the first flow path passes through the application have a second passage leading to the body,
The seal member is preferably provided between the first flow path and the second flow path .

As another means, the seal between the first flow path and the second flow path by the seal member is opened in a state where the application body is pushed against the urging force of the valve spring. Is preferred.

It is preferable to provide a storage unit side cap for sealing the marker solution storage unit at an end of the marker body on the marker solution storage unit side.
Therefore, the marker liquid storage part can be sealed and kept at a constant pressure.

The storage unit side cap is preferably a check valve.
Accordingly, the marker liquid storage unit can be sealed and kept at a constant pressure, and the marker liquid storage unit can be directly replenished with the marker liquid. In addition, the marker configuration can be simplified.

It is preferable to arrange a seal member in the outer peripheral groove of the valve.
Therefore, it is possible to prevent the marker liquid in the marker liquid storage part from leaking out through the valve and leaking to the outside of the application body and the marker.

The fastening tool which concerns on this invention accommodates the said marker in the inside so that attachment or detachment is possible, and arrange | positions the said application body to the socket side edge part fitting with a to-be-fastened member.
Thereby, when fastening a to-be-fastened member, an application body can contact | abut with the to-be-fastened member fitted with a socket, and can perform marking. Moreover, in order to change the color to be marked, the marker can be easily changed because it is simply removed from the fastening tool and replaced with a marker filled with a marker liquid of a desired color. In order to replenish the marker liquid in the marker liquid storage unit, the marker liquid can be easily replenished after the marker is removed from the fastening tool and the cap is unscrewed.

A unit spring for urging the marker toward the socket side end;
The elastic force of the unit spring is preferably higher than the elastic force of the valve spring of the marker.

  With the above configuration, when the fastening tool is fitted to a member to be fastened such as a bolt, the bolt comes into contact with the application body and is marked. Then, the bolt moves the application body toward the marker liquid storage section against the urging force of the valve spring. First, the application body presses the marker liquid storage unit through the valve to cause the marker liquid to flow out, and supplies the marker liquid to the application body. Next, the pressing force of the bolt is transmitted to the marker main body 12 through the application body and the valve, and the marker moves in the direction opposite to the socket side end of the fastening tool against the urging force of the unit spring. Thereby, a marker, ie, an application body, can be moved according to the shape and length of a bolt. Therefore, marking can be performed according to the shape and length of the bolt.

  According to the marker of the present invention and the fastening tool including the marker, the marker liquid flowing out from the marker liquid storage unit is applied to the application body by providing a flow path through which the marker liquid flows between the application body and the marker liquid storage unit. The marker solution can be reliably supplied to the application body. Accordingly, it is possible to prevent marking failure on the fastened member.

  When the fastening tool is fitted to the bolt, the bolt comes into contact with the application body, and the marker itself moves in the opposite direction to the socket side end of the fastening tool against the urging force of the unit spring. Therefore, by moving the marker, that is, the application body according to the shape and length of the bolt, marking can be performed regardless of the shape and length of the bolt.

It is sectional drawing of the marker by embodiment of this invention. It is sectional drawing which shows the state which the marker core material provided in the marker of FIG. 1 moved toward the marker liquid storage part. FIG. 3 is a partially enlarged cross-sectional view illustrating a path in which a marker liquid flows out from the marker liquid storage unit in FIG. 2 and moves to a marker core through a first path and a second path. It is sectional drawing of the fastening tool which accommodated the marker of FIG. It is sectional drawing of the fastening tool which shows the state in the middle of inserting a volt | bolt in the fastening tool of FIG. It is sectional drawing of the fastening tool which shows the state which inserted the volt | bolt in the fastening tool of FIG. It is a fragmentary sectional view of the fastening tool which shows the state which mounted | wore the fastening tool of FIG. It is sectional drawing of the marker by other embodiment of this invention. It is sectional drawing which shows the state which the marker core material provided in the marker of FIG. 8 moved toward the marker liquid storage part. It is sectional drawing which shows the state which mounted | wore the check valve with the marker of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  As shown in FIG. 1, a marker 11 according to the present invention includes a marker body 12 and a marker core 13 that is an application body disposed in the vicinity of one opening end of an insertion hole formed in the marker body 12. A holding cylinder 14 that holds the outer peripheral surface of the marker core member 13, a valve 16a that supports the end of the marker core member 13, and a valve that urges the marker core member 13 outward via the valve 16a. A spring 17 and a marker liquid storage unit 18 disposed symmetrically with the marker core 13 with respect to the valve 16a are provided.

  The marker main body 12 has a cylindrical shape, and a cap mounting inner circumferential groove 23 that fits into an annular convex portion 22 of the storage portion side cap 21 described later in order from the outside at the end opposite to the marker core 13, and O An O-ring mounting inner circumferential groove 26 to which the ring 25 is mounted and a seating surface 28 extending in the radial direction are formed.

  The marker core 13 is a known marker core that has a cylindrical shape with end portions formed in a spherical shape and can hold a marker solution therein. The marker core 13 is disposed so as to be movable in the axial direction in the insertion hole of the marker main body 12. The marker 61 can be marked by contacting the marker 61 with a bolt 61 that is a member to be fastened, which will be described later.

  The holding cylinder 14 is attached to the inner peripheral surface of the marker main body 12 with an adhesive or the like, protrudes from the end of the marker main body 12, and holds the side surface of the marker core member 13. A wire spring mounting groove 31 is provided on the outer peripheral surface of the holding cylinder 14, and a locking portion 32 having one end extending radially outward is provided between the wire spring mounting groove 31 and the end of the marker body 12. A wire spring 33 is mounted. When the marker main body 12 is mounted on a fastening tool 51 described later, the locking portion 32 is locked in the circular hole 52 of the fastening tool 51. Further, a cap locking projection 34 is formed in an annular shape on the exposed outer peripheral surface of the holding cylinder 14.

  The valve 16 a has a large-diameter portion 37 that is in sliding contact with the inner peripheral surface of the marker main body 12 and a small-diameter portion 38 that is in sliding contact with the inner peripheral surface of the holding cylinder 14, and between the large-diameter portion 37 and the small-diameter portion 38. A valve outer peripheral groove 39 is formed. A conical hole 40 is formed in the end face of the small diameter portion 38, and the conical hole 40 abuts on the end of the marker core 13, so that the valve 16 a is inserted into the insertion hole of the marker body 12 together with the marker core 13 in the axial direction. It is arranged to be movable. An O-ring 39a, which is a seal member, is attached to the valve outer peripheral groove 39.

  As shown in FIG. 3, a space L1 is provided between the large diameter portion 37 of the valve 16a and the marker body 12, and this space L1 is a first flow path 41 through which the marker liquid flowing out from the marker liquid storage section 18 flows. Is forming. Further, an interval L2 is provided between the small diameter portion 38 of the valve 16a and the marker body 12, and this interval L2 passes through the second channel 42 through which the marker liquid flowing out from the first channel 41 flows to the marker core member 13. Forming.

  The valve spring 17 is a known elastic member, and is disposed along the inner peripheral surface inside the marker body 12. One end of the valve spring 17 is locked to an annular protrusion 47 of an inner cylinder 46 described later, and the other end is locked to a large diameter portion 37 of the valve 16a. The valve spring 17 urges the marker core member 13 in the direction opposite to the arrow in the figure via the valve 16a.

  The marker solution storage unit 18 is a known marker solution storage unit filled with a marker solution therein, and is made of, for example, a sponge. The marker liquid storage unit 18 is installed inside the inner cylinder 46 disposed in the axial direction inside the insertion hole of the marker main body 12, and has one end protruding from the inner cylinder 46 and the large-diameter portion 37 of the valve 16 a. It is in contact. The inner cylinder 46 includes a cylindrical circumferential wall 48 and an annular protrusion 47 that is formed so as to protrude outward from the end of the circumferential wall 48 and is engaged with the seating surface 28 of the marker body 12. An annular stopper 49 that can come into contact with the valve 16 a is formed at the other end of the inner cylinder 46. A gap L3 is provided between the stopper 49 and the valve 16a.

  In order to seal the marker liquid storage unit 18 inside the marker body 12, the storage unit side cap 21 is detachably attached to the end of the marker body 12. At this time, the annular convex portion 22 of the storage portion side cap 21 is fitted in the cap mounting inner circumferential groove 23 of the marker main body 12. The marker liquid in the marker liquid storage section 18 is sealed to the marker main body 12 by attaching the storage section side cap 21 to the marker main body 12, and the marker liquid in the marker liquid storage section 18 is removed by removing the storage section side cap 21. Can be replenished.

In FIG. 4, the state which mounted | wore the fastening tool 51 with the marker 11 by embodiment of this invention is shown.
The fastening tool 51 has a cylindrical shape, and a socket 53 that meshes with the bolt 61 is formed at one end. A connecting hole 54 having a square cross section that is connected to a drive source (not shown) for fastening the bolt 61 is formed at the other end. A seat surface 56 extending radially inward is formed on the inner peripheral surface of the fastening tool 51, and the insertion hole on the socket side is larger in diameter than the seat surface 56, and the insertion hole side is inserted on the connection hole side from the seat surface 56. The hole has a smaller diameter. A circular hole 52 is provided near the socket side end of the fastening tool 51, and an elongated hole 57 extending in the axial direction is provided at the center. The elongated hole 57 pushes out the marker 11 when foreign matter such as dust enters the fastening tool 51 and the marker 11 cannot be removed from the fastening tool 51 only by the elastic force of a unit spring 59 described later. Used for.

Hereinafter, the mounting operation of the marker 11 to the fastening tool 51 will be described.
In order to attach the marker 11 to the fastening tool 51, first, the unit spring 59 is inserted from the socket side end of the fastening tool 51. Next, the cap side end portion of the marker 11 is similarly inserted from the socket end portion. Accordingly, the unit spring 59 is disposed between the seat surface 56 of the fastening tool 51 and the marker 11. When the marker 11 is further inserted against the urging force of the unit spring 59, the locking portion 32 of the wire spring 33 is locked to the inner peripheral surface of the circular hole 52 of the fastening tool 51. Thereby, the marker main body 11 can be mounted in the fastening tool 51 so as to be movable in the axial direction without jumping out of the fastening tool 51.

  The marker 11 is attached to the fastening tool 51 so that the marker core 13 is positioned in the vicinity of the socket side end of the fastening tool 51. Further, the marker 11 is urged toward the socket side end by a unit spring 59 which is locked to the seat surface 56. The elastic force of the unit spring 59 is higher than the elastic force of the valve spring 17.

  In order to take out the marker 11 from the fastening tool 51, the locking portion 32 of the wire spring 33 is pressed inward in the radial direction against the elastic force to release the locking with the circular hole 52. Then, the marker 11 is urged by the unit spring 59 and moves to the socket side end, and the marker 11 can be taken out from the socket side end. Therefore, in order to change the marking color, it is possible to easily change the marker 11 by taking out the marker 11 from the fastening tool 51 and replacing it with a marker filled with a marker liquid of a desired color. Further, in order to replenish the marker liquid in the marker liquid storage unit 18, the marker liquid can be easily replenished after removing the marker 11 from the fastening tool 51 and screwing out the storage unit side cap 21.

  Next, the operation of engaging the head 62 of the bolt 61 with the socket 53 of the fastening tool 51 and fastening or loosening the bolt 61 will be described.

  As shown in FIG. 5, when the head portion 62 of the bolt 61 is fitted into the socket 53, the head portion 62 of the bolt 61 contacts the marker core member 13. The marker core 13 is pressed by the head 62 of the bolt 61 and moves in the direction of the arrow in the figure, thereby compressing the valve spring 17 having a low elastic force through the valve 16a. Thereby, the marker core 13 and the valve 16a move until the valve 16a contacts the stopper 49 of the inner cylinder 46. When the valve 16a moves, the marker liquid storage unit 18 is pressed and compressed, so that the marker liquid filled therein flows out from the marker liquid storage unit 18 (see FIG. 3). The marker liquid that has flowed out first passes through the first flow path 41 and in the vicinity of the O-ring 39a. Subsequently, since it flows through the second flow path 42 and reaches the marker core member 13, the marker liquid can be reliably supplied to the marker core member 13. Therefore, the marking defect to the bolt 61 can be prevented. When the valve 16a comes into contact with the stopper 49, the marker liquid storage unit 18 is sealed by the valve 16a and the inner cylinder 46, and the outflow of the marker liquid from the marker liquid storage unit 18 stops.

  When the bolt 61 is further inserted into the socket 53, as shown in FIG. 6, the pressing force of the bolt 61 is transmitted in the order of the marker core member 13, the valve 16a, the inner cylinder 46, and the marker body 12, and the urging force of the unit spring 59 Against this, the marker 11 moves in the direction opposite to the socket side end of the fastening tool 51. By moving the marker 11 in the fastening tool 51, marking can be performed according to the shape and length of the bolt 61.

  Then, with the bolt 61 fitted in the socket 53, the bolt 61 can be tightened or loosened via the fastening tool 51 by a driving force from a power source (not shown) coupled to the coupling hole 54.

  When the tightening or loosening is completed, the head 62 of the bolt 61 is removed from the socket 53. At this time, first, the marker 11 moves toward the socket side end by the urging force of the unit spring 59, and stops when the locking portion 32 of the wire spring 33 is locked in the circular hole 52. Subsequently, the marker core 13 is moved by the urging force of the valve spring 17 through the valve 16a until the O-ring 39a and the end of the holding cylinder 14 come into contact with each other.

  After the fastening of the bolt 61 is completed, when the fastening tool 51 is removed from the bolt 61, the cap 35 is attached to the holding cylinder 14 by being engaged with the cap engaging projection 34. Thereby, the marker core material 13 is sealed and the marker liquid of the marker core material 13 can be prevented from drying (see FIG. 7).

  Further, since the O-ring 39a, which is a seal member, is attached to the outer peripheral groove 39 of the valve 16a, the marker liquid in the marker liquid storage section 18 leaks through the valve 16a, and the outside of the marker core 13 and the marker 11 It is possible to prevent leakage.

  The marker and the fastening tool of the present invention are not limited to the above embodiment, and various modifications are possible.

  Regarding the valve 16 a of the marker 11, the end portion of the marker core member 13 is supported by the conical hole 40 in the above-described embodiment. Specifically, as shown in FIG. 8, the valve 16 b is a cylindrical valve body 71 and a cylinder that extends from the valve body 71 toward one end and includes and supports the end and side surfaces of the marker core 13. It has a shape-shaped support portion 72 and a protruding edge portion 73 formed at the other end of the valve body 71 and protruding outward in the radial direction. An outer peripheral groove 76 is formed on the outer periphery of the valve body 71, and an O-ring 77 as a seal member is attached to the outer peripheral groove 76. Further, around the central axis of the valve main body 71, a flow path 78 that communicates the marker liquid storage unit 18 and the marker core member 13 passes therethrough. The side surface of the valve 16b is movably held by the holding cylinder 14. The marker liquid storage unit 18 is installed inside the inner cylinder 46 in the above embodiment, but instead, a stepped portion 79 is provided in the vicinity of the valve 16b on the inner peripheral surface of the marker main body 12, and the stepped portion 79 and the seating surface are provided. The marker liquid storage unit 18 may be installed directly between An interval L4 is provided between the valve 16b and the stepped portion 79.

Next, the operation | movement at the time of attaching the marker 11 of the said structure to the fastening tool 51, and fastening the volt | bolt 61 is demonstrated.
When the bolt 61 is inserted into the socket 53 and the marker core 13 contacts the bolt 61 and moves in the direction of the arrow in the figure, the valve 16b moves until it is locked to the stepped portion 79 against the urging force of the valve spring 17. (See FIG. 9). Thereby, since the valve 16b presses and compresses the marker liquid storage part 18, the marker liquid with which the inside is filled out from this marker liquid storage part 18. Since the marker liquid that has flowed out passes through the flow path 78 and reaches the marker core material 13, the marker liquid can be reliably supplied to the marker core material 13. Therefore, the marking defect to the bolt 61 can be prevented. Since the flow path 78 is formed in the valve 16b, the pressure in the marker liquid storage unit 18 is kept constant except when the marker liquid storage unit 18 is pressed by the valve 16b to supply the marker liquid. The marker liquid can be prevented from leaking from the marker liquid storage unit 18. Since the O-ring 77 which is a seal member is attached to the outer peripheral groove 76 of the valve 16b, the marker liquid in the marker liquid storage section 18 leaks through the valve 16b and leaks to the outside of the marker core 13 and the marker 11. Can be prevented.

  Moreover, in the said embodiment, although the storage part side cap 21 was mounted | worn with the marker main body 12, you may mount | wear with the checker valve 81 shown in FIG. A check valve mounting groove 82 having a smaller diameter than a later-described flange 83 of the check valve 81 is formed at the end of the marker body 12 opposite to the marker core member 13. The check valve 81 includes a flange 83 that fits into the check valve mounting groove 82, and a flat tapered portion 85 that is continuous with the flange 83 and is inclined so that the mouth portion 84 at the tip is sealed by pressure. This is a known check valve. By mounting the check valve 81 on the marker main body 12, the marker liquid storage unit 18 can be sealed and maintained at a constant pressure, and the marker liquid storage unit 18 can be directly replenished with the marker liquid via the mouth 84. . Moreover, the structure of the marker 11 can be simplified and manufacturing cost can be reduced.

11 Marker 12 Marker body 13 Marker core material (applied body)
14 Holding cylinder 16a Valve (first embodiment)
16b Valve (second embodiment)
17 Valve spring 18 Marker liquid storage part 21 Storage part side cap 39a O-ring (seal member)
41 1st flow path 42 2nd flow path 51 Fastening tool 59 Unit spring 78 Flow path (2nd Embodiment)
81 Check valve

Claims (9)

A marker body having an insertion hole, one end opened and the other end closed, a valve slidably in contact with the inner peripheral surface of the marker body, and an axially movable one opening end of the insertion hole An applied body, a marker liquid storage section filled with a marker liquid to be supplied to the applied body, and a valve spring that urges the applied body outward through the valve,
The application body and the marker liquid are arranged so that the marker liquid flows out when the application body moving in the axial direction against the urging force of the valve spring presses the marker liquid storage section via the valve. Rutotomoni provided a flow path for communicating the reservoir, a marker, characterized in that a seal member for sealing the flow path. The flow path is
A first flow path that is provided between the inner peripheral surface of the marker body and the valve and through which the marker liquid flowing out from the marker liquid storage section passes, and the marker liquid that has passed through the first flow path passes through the application have a second passage leading to the body,
The marker according to claim 1 , wherein the seal member is provided between the first flow path and the second flow path . The seal between the first flow path and the second flow path by the seal member is opened in a state where the application body is pushed against the urging force of the valve spring. Item 3. The marker according to item 2 . The marker according to any one of claims 1 to 3, wherein the marker liquid storage unit is a porous flexible body filled with a marker liquid. The marker according to any one of claims 1 to 4 , wherein a storage unit side cap for sealing the marker solution storage unit is provided at an end of the marker body on the marker solution storage unit side. The marker according to claim 5, wherein the storage unit side cap is a check valve. Marker according to any one of claims 1 to 6, characterized in that arranged the sealing member to the outer peripheral groove of the valve. A fastening tool characterized in that the marker according to any one of claims 1 to 7 is detachably housed inside and the applicator is disposed in the vicinity of a socket side end portion to be fitted with a member to be fastened. A unit spring for urging the marker toward the socket side end;
The fastening tool according to claim 8 , wherein the elastic force of the unit spring is higher than the elastic force of the valve spring of the marker.

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