JP5789852B2 - Screw member fastening device and pipe joint fastening device - Google Patents

Description

  The present invention relates to a screw member fastening device that fastens a male screw member and a female screw member, and a pipe joint fastening device that is coupled by tightening the male screw member and the female screw member.

  A pipe joint that includes first and second tubular joint members having fluid passages that communicate with each other and is coupled by screwing a male screw member and a female screw member is well known (Patent Literature). 1).

  When tightening such a pipe joint, in order to secure the sealing function, proper tightening is necessary, and it is important to prevent forgetting to tighten. A marker-equipped tightening tool is known as an apparatus for tightening a screw member while preventing forgetting to tighten (Patent Document 2).

JP 2010-96329 A JP 4585932 A

  When the pipe joint of Patent Document 1 is tightened in the middle of piping, it is necessary to fit a tightening jig so as to be orthogonal to the axial direction of the screw member. It is impossible to tighten a simple pipe joint, and there is a demand for a pipe joint tightening device with a function of preventing forgetting to tighten.

  The object of the present invention is a screw capable of performing tightening with a function for preventing forgotten tightening only by performing the same work as before even if there is a restriction on the place of tightening such as a pipe joint. It is an object of the present invention to provide a member fastening device and a pipe joint fastening device in which the screw member fastening device is applied to a pipe joint.

A screw member tightening device according to the present invention is a tightening device that performs tightening by relatively rotating a male screw member and a female screw member, and is fitted so as to be orthogonal to the axial direction of one of the screw members. A first jig that holds the member so as not to rotate, a second jig that is fitted so as to be orthogonal to the axial direction of the other screw member and rotates the screw member, and a second jig that is in contact with the other screw member. and a marking device provided in the 1 jig, when the other of the threaded member is rotated, characterized in that it is adapted to mark the other screw member is applied by a marking member Is.

  The first jig and the second jig are, for example, spanners having a bifurcated portion. The marking member can be a marker, magic ink, felt pen, sign pen, or similar writing tool. Specifically, the marking member is a cylindrical ink reservoir and a pen provided at one end thereof. It is assumed to have a tip. In addition to this, various things can be used as the marking member as long as the marking is made by contacting the object.

  According to the screw member tightening device of the present invention, since both the first jig and the second jig are fitted so as to be orthogonal to the axial direction of the screw member, for example, a pipe joint installed in the middle of the pipe Thus, even if piping extends on both sides of the pipe joint, the jig can be fitted to the screw member without interfering with the piping. By performing this fitting, the marking member is brought into contact with the screw member that is rotated, and then the second jig is rotated and tightened, whereby the mark is placed on the rotated screw member. Applied. Thus, as a work for tightening, the screw member is marked only by performing the same work as before, and it is possible to determine whether or not the screw member has been properly tightened by the presence or absence of this mark.

  A fastening device for a pipe joint according to the present invention includes first and second tubular joint members having fluid passages communicating with each other, and a male screw member and a female screw member for coupling both joint members. A first jig that is fitted so as to be orthogonal to the axial direction of the male screw member and holds the screw member so as not to rotate, and is orthogonal to the axial direction of the female screw member. A second jig for rotating the female screw member and a marking member provided on the first jig so as to contact the female screw member, and when the female screw member is rotated, The female screw member is marked by the marking member.

  That is, by applying the above-described screw member tightening device to a pipe joint, it is possible to perform tightening with a function to prevent tightening by simply performing the same operation as before when tightening the pipe joint.

  The joint members of the pipe joint are fastened by appropriate screw means. As this screw means, for example, a threaded portion (male thread member) is formed on one of the first and second joint members, and the joint Both joint members may be coupled by a cap nut (female thread member) screwed to the male thread portion of the member, and both the first and second joint members are sleeves in which the male thread portion is not formed. Both joint members may be coupled by a separate male screw member and cap nut (female screw member).

  According to the screw member tightening device of the present invention, the first jig that is fitted so as to be orthogonal to the axial direction of one of the screw members and holds the screw member so as not to rotate, and the axial direction of the other screw member And a marking member provided on the first jig so as to contact the other screw member, and the other screw member rotates. Since the marking member marks one of the screw members when tightened, even if there is a restriction on the place where the tightening is performed, the same operation as before can be performed. Tightening with a forgetting prevention function can be performed.

  According to the fastening device for a pipe joint of the present invention, the first jig that is fitted so as to be orthogonal to the axial direction of the male screw member and holds the screw member so as not to rotate is orthogonal to the axial direction of the female screw member. A second jig for rotating the female screw member and a marking member provided on the first jig so as to contact the female screw member, and when the female screw member is rotated. Since the female thread member is marked by the marking member, it is possible to perform tightening with the function to prevent tightening by simply performing the same operation as before when tightening the pipe joint. it can.

FIG. 1 is a longitudinal sectional view showing an embodiment of a tightening device according to the present invention. FIG. 2 is a plan view showing a first jig of the fastening device according to the present invention. FIG. 3 is a perspective view showing a female screw member of the fastening device according to the present invention. FIG. 4 is a perspective view showing the pipe joint tightened by the tightening device according to the present invention.

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

  FIGS. 1 to 4 show an embodiment in which the screw member fastening device (1) according to the present invention is applied to a pipe joint fastening device.

  The tightening device (1) is a tightening device that tightens the pipe joint (2) by relatively rotating the male screw member (11) and the female screw member (12), and does not rotate the male screw member (11). The first spanner (first jig) (21), the second spanner (second jig) (22) for rotating the female screw member (12), and the female screw member (12). The marking member (23) provided in the 1st spanner (21) so that it may contact | connect is provided. When the female screw member (12) is rotated, the marking member (23) is brought into contact with the female screw member (12), so that the correctly tightened pipe joint (2) is shown in FIG. As shown in Fig. 2, the mark (M) is provided so that it is possible to confirm that the forgotten tightening of the pipe joint (2) after tightening is confirmed.

  As shown in FIG. 1, the pipe joint (2) includes first and second tubular joint members (3) and (4) having fluid passages (3a) and (4a) communicating with each other, and joint members ( 3) Screw means (5) for coupling (4) to each other, and sealing means (6) having a gasket (7), a retainer (8) and an elastic ring (9).

  The screw means (5) is fitted to the first joint member (3) and the male thread member (11) fitted to the second joint member (4) and abutted against the flange portion of the second joint member (4). And a female screw member (12) screwed to the screw member (11).

  The male screw member (11) is formed with an engaging portion (11a) for engaging a wrench whose outer peripheral surface has a hexagonal shape, and the first wrench (21) is also shown in FIG. As shown, a polygonal inner peripheral surface (21a) that engages with the engaging portion (11a) is formed.

  The female screw member (12) is a so-called cap nut and normally has a hexagonal outer peripheral surface. However, as shown in FIG. The outer peripheral surface of 12) has a hexagonal surface (12a) for engaging the spanner and a cylindrical surface (12b) with which the marking member (23) is brought into contact.

  The second spanner (22) has the same shape as the first spanner (21), and has a polygonal inner peripheral surface (22a) that engages with the hexagonal surface (12a) of the female screw member (12). Is formed.

  The marking member (23) has a cylindrical ink reservoir portion (23a) and a pen tip portion (23b) provided at the upper end portion thereof, and the pen tip portion (23b) is a cylinder of the female screw member (12). It is made to contact | abut from the direction (right side of FIG. 1) orthogonal to the axial direction of the internal thread member (12) at the surface (12b).

  When tightening the pipe joint (2), fit the first spanner (21) to the male screw member (11) so as to be orthogonal to the axial direction of the male screw member (11) (from the right in FIG. 1). Hold this against rotation and fit the second spanner (22) to the female screw member (12) so as to be orthogonal to the axial direction of the female screw member (12) (from the right side of FIG. 1). Rotate this. Thus, the mark (M) is applied to the female screw member (12) by the marking member (23) provided on the first spanner (21) so as to contact the female screw member (12).

  Thus, even if the pipe extends on both sides of the pipe joint (2), the pipe joint (2) can be tightened without interfering with the pipe. Here, as the work for tightening, it is only necessary to carry out the same work as before, and by this, the mark (M) is given to the female thread member (12), and depending on the presence or absence of this mark (M) It is possible to determine whether or not it has been tightened.

  The cross-sectional shape of the pipe joint (2) shown in FIG. 1 is an example, and the pipe joint is not limited to this. For example, FIG. 1 shows the male screw member as a separate member, but the male screw member can be made unnecessary by providing the first joint member with a screw portion. In this case, the male thread member is the male thread portion of the first joint member or the first joint member itself.

  Further, the screw member tightening device (1) described above can be applied to the tightening of the male screw member and the female screw member even if it is other than the pipe joint (2).

  (1): Tightening device, (2): Pipe joint, (3): First joint member, (4): Second joint member, (11): Male thread member, (12): Female thread member, (12a ): Hexagonal surface (polygonal surface), (12b): cylindrical surface, (21): first spanner (first jig), (22): second spanner (second jig), (23 ): Marking material

Claims (3)

A screw member fastening device for fastening by rotating a male screw member and a female screw member relatively,
A first jig which is fitted so as to be orthogonal to the axial direction of one of the screw members and holds the screw member so as not to rotate; and the screw which is fitted so as to be orthogonal to the axial direction of the other screw member a second jig for rotating the member, and a marking device provided in the first jig in contact with the other of the screw member, when the other of the threaded member is rotated, the other by the marking member A screw member tightening device, wherein a mark is applied to the screw member. An apparatus for tightening a pipe joint comprising first and second tubular joint members having fluid passages communicating with each other, and a male thread member and a female thread member for coupling both joint members,
A first jig that is fitted to be orthogonal to the axial direction of the male screw member and holds the screw member so as not to rotate, and is fitted to be orthogonal to the axial direction of the female screw member and rotates the female screw member. A second jig and a marking member provided on the first jig so as to contact the female screw member are provided, and when the female screw member is rotated, the marking member marks the female screw member. A tightening device for a pipe joint, wherein   3. An apparatus for tightening a pipe joint according to claim 2, wherein the outer peripheral surface of the female screw member has a polygonal surface on which the second jig is fitted and a cylindrical surface on which the marking member is brought into contact. .

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