JP4722093B2 - Pipe equipment - Google Patents

Description

  The present invention relates to a pipe fixing device that is inserted into an end of a pipe member when fixing a pipe member such as a hanger attached to a wall surface and a plate member.

  Conventionally, a hanger is attached to a wall surface of a store or the like, and is used for display of goods. As shown in FIG. 22, the hanger has a pair of arm-shaped plate members (brackets) 300 attached to walls at both ends of the pipe 200. The pipe 200 includes a branch pipe member 200b that is fixed so as to protrude forward and backward from the axial center of the pipe 200, and a pin 200c that protrudes upward from the tip of the branch pipe member 200b. It has. An end part is attached to the tip of the branch pipe member 200b. Then, the locking claws 301 provided on the bracket 300 are engaged with a large number of slit-like locking grooves 401 provided on the front surface of the vertical support member 400 such as a pipe steel material or a channel steel material attached to a wall or the like. A hanger is attached to the wall surface.

  By the way, as a method of fixing a pair of arm-shaped brackets 300 attached to, for example, walls to the both ends of one pipe 200 so that the end portions of the pipe 200 abut against each other, the pipe fixing device 100 is attached to each end portion of the pipe 200. Is inserted, the bolt 102 inserted through the hole 302 of the bracket 300 is screwed into the pipe fixing device 100, and the bracket 300 is fastened to both end faces of the pipe 200 by tightening the bolt 102.

  The above-described pipe fixing device 100 includes an insertion member 100 that is inserted into the end portion of the pipe 200 and a bolt that is inserted into the bracket 300 and screwed into the screw hole 101 of the insertion member 100. 100 is fixed to the end of the pipe 200 by, for example, press fitting.

  As described above, the brackets 300 attached to both ends of the pipe 200 are engaged with the engaging claws 301 in the engaging grooves 401 of the vertical support 400 attached to a wall or the like. For this reason, the brackets 300 at both ends need to be fixed to the pipe fixing device 100 in parallel with each other.

  As described above, when the brackets 300 are attached to both ends of the pipe member 200, it is desirable that the brackets 300 at both ends are attached at the same attachment angle, but the attachment angles may be uneven. In many cases, when the plate member 300 is twisted around the axis of the pipe member 200 in order to correct this unevenness, the bolt 120 is loosened, and the connection between the pipe member 200 and the plate member 300 becomes uncertain. Furthermore, when an external force that rotates around the axis acts on the pipe member 200, the insertion member 100 rotates if a technique is not used to suppress rotation between the insertion member 100 and the pipe member 200. May end up.

  For example, when a load is applied in the vicinity of the tip of the branch pipe member 200b, an external force that rotates around the axis acts on the pipe member 200, and the pipe member 200 rotates relative to the insertion member 100. is there.

Therefore, as shown in FIG. 22, in order to prevent rotation between the insertion member 100 and the pipe member 200, a positioning groove 102 is provided in the insertion member 100, and a protrusion is provided on the inner surface of the pipe member 200, thereby positioning the groove. The insertion member 100 is configured to be press-fitted together with 110 and the protrusion. It is known that the rotation between the insertion member 100 and the pipe member 200 is prevented by the engagement between the positioning groove 102 and the projection of the pipe member 200.

  Furthermore, there has been proposed a pipe fixing device that can accurately determine the attachment angle of the plate member around the axis of the pipe member at the same time as the assembly, and prevents the pipe member from rotating relative to the insertion member 100 (see Patent Document 1).

As shown in FIG. 23, the pipe fixing device disclosed in Patent Document 1 has the same shape formed on the plate member 1 on the non-circular protrusion 13 as viewed from the axial direction provided on the end surface 8 of the insertion member 4. The mounting angle between the insertion member 4 and the plate member (bracket) 1 is determined simultaneously with the assembly by fitting the holes 12. Further, the insertion member 4 is inserted into the pipe member 2a while aligning the positioning groove 17 formed on the peripheral surface of the insertion member 4 with the protrusion 18 formed on the inner periphery of the pipe member 2a, and is inserted simultaneously with the assembly thereof. The mounting angle of the pipe member 2a with respect to the member 4 is determined.
JP 2002-31112 A

  In the pipe fixing device in which the positioning groove 102 is provided in the insertion member 100 described above and the protrusion is provided on the inner surface of the pipe member 200, the pipe member can be prevented from rotating with respect to the insertion member 100. However, in order to provide the pipe member 200 with a protrusion for preventing rotation, for example, a work process such as driving a part of the pipe member 200 in the circumferential direction in the axial direction is required, and the work becomes troublesome.

  Further, the one shown in Patent Document 1 also requires a work process for providing the pipe member 2a with a protrusion for preventing rotation, which makes the work cumbersome.

  An object of the present invention is to solve these problems of the prior art and to provide a pipe fixing device that can prevent the pipe member from rotating relative to the insertion member without increasing the number of work steps. It is another object of the present invention to provide a pipe fixing device that can accurately determine the mounting angle of the plate member around the axis of the pipe member simultaneously with the assembly.

The pipe device of the present invention is a pipe frame comprising a pipe member and a pipe fixing device having a columnar insertion member inserted into an end portion of the pipe member, wherein the pipe fixing device is one of the insertion members. The outer diameter of the end surface of the pipe member is formed larger than the inner diameter of the pipe member, and the outer diameter of the other end surface is formed to be smaller than the inner diameter of the pipe member, and at least a part of the columnar flat portion is cut out. The pipe member is press-fitted into the pipe member from the other end surface of the insertion member, and the pipe member has a portion along the circumferential portion of the insertion member enlarged in a circular shape, and a portion along the flat portion of the insertion member. It is deformed close to the flat side, wherein the insert member in a state where both ends are engaged in contact with the inner peripheral surface of the pipe member of the flat portion is fixed to the pipe member

  The insertion member may include a straight portion having a predetermined length and the same diameter from the one end surface, and may be formed so as to have a smaller diameter from the straight portion toward the other end surface.

  According to the configuration described above, when the insertion member is inserted into the pipe member, the portion along the circumferential portion of the insertion member of the pipe member is enlarged and deformed in a circular shape. On the other hand, the pipe member at the flat portion is deformed by approaching the flat portion as the portion along the circumferential portion is enlarged and deformed. Thus, an insertion member is fixed to a pipe member by expanding and deforming an insertion member to a pipe member and press-fitting. And the both ends of the flat part of an insertion member will be in the state which contact | abutted and meshed with the inner surface of the pipe member, and it can prevent the rotation of the insertion member around the axial center.

  In the present invention, the material of the pipe fixing device is not particularly limited. For example, steel including iron, stainless steel, copper, bronze, aluminum, brass, gun metal, or the like may be used.

  Furthermore, it is preferable that a protrusion that is formed in a non-circular shape when viewed from the axial direction of the one end face and is fitted in the same shape fitting hole provided in the plate member is provided on the one end face in parallel with the flat portion.

  Here, the non-circular shape refers to an arbitrary shape excluding a circular shape concentric with the bolt insertion hole, for example, a rectangular shape such as a rectangle, a square, a rhombus, a trapezoid, a parallelogram, a triangle, a pentagon, a hexagon, a seventh In addition to polygonal shapes including squares, octagons, etc., fan shapes, chordal shapes, oval shapes, elliptical shapes, etc., for example, a circular shape eccentric from the bolt insertion hole, 1 provided at a symmetrical position with respect to the center of the end face A pair of pins, such as a plurality of pins distributed at a plurality of three or more locations equidistant from the center of the end face, and the like, the plate member is attached to the end face by fitting with the protrusion and the fitting hole of the plate member. Thus, it is used in the sense that it includes a wide variety of non-rotatable shapes around the nut portion.

According to this inventions, the insertion member is inserted into the pipe member, portions along the circumference of the insertion member of the pipe member, as well as being expanded and deformed into a circular shape, the pipe member portion of the flat portion, As the portion along the circumferential portion is enlarged and deformed, the portion approaches the flat portion and deforms. And the both ends of the flat part of an insertion member will be in the state which contact | abutted and meshed | engaged the inner surface of a pipe member, and the rotation around the axial center of an insertion member can be prevented.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated in order to avoid duplication of description. Prior to this, a hanger to which the present invention is applied will be described.

The hanger shown in the exploded perspective view of FIG. 1 assembles a pipe frame 20 between a pair of brackets (plate members) 1 using a pipe fixing device 3 according to an embodiment of the present invention. Thereafter, the locking claws 1a of the two plate members 1 are engaged with and fixed to the vertical support members attached to the walls or the like.

  The pipe frame 20 includes a stem pipe member 20a whose left and right ends are connected to the bracket 1 in abutting manner, a branch pipe member 20b fixed so as to protrude forward and backward from the axial center thereof, And a pin 20c protruding upward at the tip of the branch pipe member 20b. An end part is attached to the tip of the branch pipe member 20b.

  The pipe fixing device 30 used for the connection between the trunk pipe member 20a and the bracket 1 will be described. 2 is a front view showing an insertion member of the pipe fixing device, FIG. 3 is a sectional view taken along line AA, FIG. 4 is a top view, and FIG. 5 is a side view.

  As shown in the exploded perspective view of FIG. 1 and FIGS. 2 to 5, the pipe fixing device 30 is inserted into the insertion member 34, a nut portion 35 formed inside the insertion member 34, and the bracket 1, and is inserted into the insertion member 34. And a bolt 6 screwed into the nut portion 35.

  The insertion member 34 includes an end surface 38 in which a bolt insertion hole 37 is formed at the center, and a cylindrical portion 39 formed so as to be continuous with one surface of the end surface 38. A hole 41 connected to the nut portion 35 is provided in the end surface 40 on the opposite side of the end surface 38 of the cylindrical portion 39.

  The insertion member 34 is formed of, for example, stainless steel or steel steel, and the diameter of the circumferential portion of the end face 38 is formed to be about 0.5 mm larger than the inner diameter of the press-fitted pipe member 20a. For example, when the inner diameter (φ) of the pipe member 20a is 23 mm, the diameter is 23.4 mm, and when the inner diameter (φ) of the pipe member 20a is 29.4 mm, the diameter is 29.9 mm. Formed in size.

Insert member 34 has a size straight portion formed of a predetermined length the same diameter from the end face 38, the hand is formed such that the small diameter toward the tip face 40 from the straight portion. The diameter of the circumferential portion of the end face 40 is about 0.5 mm smaller than the inner diameter of the pipe member 20a.

  In this embodiment, the entire length of the cylindrical portion 39 of the insertion member 34 is 38 mm, and the length of the straight portion is 6 mm.

  In the insertion member 34 according to the present invention, a flat portion 42 formed by cutting out at least a part of the circumference of the cylindrical portion 39 is formed from the end surface 38 to the end surface 40. As shown in FIG. 2, the flat portion 42 is formed by cutting out a region indicated by a one-dot chain line of the cylindrical portion 39. This notch amount (B in the figure) is 3 mm in this embodiment. Therefore, for example, when the inner diameter (φ) of the pipe member 20a is 23 mm, the distance from the flat portion 42 at the center of the cylindrical portion to the circumference of the opposite circumference is 20.4 mm, and the inner diameter (φ) of the pipe member 20a is 29. In the case of .4 mm, the distance from the flat part 42 at the center of the cylindrical part to the periphery of the opposite circumference is formed to 26.9 mm.

  Further, as shown in FIGS. 2 to 5, an oval projection 43 corresponding to the fitting hole 12 formed in the bracket 1 is continuously provided on the end surface 38. The straight portion of the protrusion 43 is formed in parallel to the straight portion of the flat portion 42 described above.

  The insertion member 34 is press-fitted into the pipe member 20a with the end surface 40 side of the cylindrical portion 39 first at the end of the pipe member 20a, and the insertion member 34 is attached to the pipe member 20a.

  This press-fitting operation is performed by, for example, driving the insertion member 34 from both sides of the pipe member 20a simultaneously by hydraulic pressure with reference to the center hole of the pipe member 20a (hole for attaching a branch pipe member or the like). Do. For example, the insertion members 34 and 34 are positioned and held by a pair of jigs configured to be movable left and right by hydraulic pressure. Therefore, a pin corresponding to the nut portion 35 is provided on the jig, and the insertion portion 34 is fixed by inserting the nut portion 35 into the pin. By aligning the position below the pipe member 20a with the position of the flat portion 42 of the insertion member 34, the end faces 40 of the insertion member 34 are inserted into both ends of the pipe member 20a. Thereafter, the insertion member 34 is press-fitted by hydraulic pressure. Since the insertion member 34 is increased in diameter toward the end surface 38, the insertion member 34 is inserted while deforming the pipe member 20a. When the end surface 38 is inserted until it reaches the distal end surface of the pipe member 20a, the attachment angle around the axis of the insertion member 34 relative to the pipe member 20a is determined at the same time.

  When the insertion member 34 is inserted into the pipe member 20a, the portion along the circumference of the insertion member 34 of the pipe member 20a is enlarged and deformed in a circular shape. On the other hand, the pipe member 20a in the portion of the flat portion 42 is deformed by approaching the flat portion 42 side as the portion along the circumferential portion is enlarged and deformed.

  In the press-fitting operation described above, the position below the pipe member 20a and the position of the flat portion 42 of the insertion member 34 are matched for the following reason. As described above, the pipe member 20a in the portion of the flat portion 42 is deformed by approaching the flat portion 42 side as the portion along the circumferential portion is enlarged and deformed. Therefore, the portion of the flat portion 42 is deformed in the pipe member 20a. Will be deformed from an arc shape to a little elliptical shape. For this reason, when it sees as a cylindrical pipe, it looks a little distorted. Thus, the flat portion 42 of the insertion member 34 is positioned at a position below the pipe member 20a to improve the appearance from above.

  FIG. 6 shows a pipe member 20a having an inner diameter (φ) of 23 mm into which an insertion member 34 for an inner diameter of 23 mm is press-fitted. The pipe member 20a has a pipe thickness of 1.2 mm. Therefore, the pipe member 20a has an outer diameter of 25.4 mm (see C in the figure).

  FIG. 7 shows a state after the insertion member 34 is press-fitted into the pipe member 20a. As described above, when the insertion member 34 is inserted into the pipe member 20a, the portion of the pipe member 20a along the circumferential portion of the insertion member 34 is enlarged and deformed into a circular shape, and the portion along the circumferential portion ( The X portion in the figure was 25.8 mm. That is, the 0.2 mm pipe member 20 a is enlarged at the straight portion of the insertion member 34.

  And the pipe member 20a of the part (Y part in a figure) of the flat part 42 approached the flat part 42 side and deform | transformed with the part along a circumference part being expanded and deformed, and became 25 mm. In other words, the 0.2 mm pipe member 20a approaches the flat portion 42 side of the insertion member 34.

  Thus, the insertion member 34 is fixed to the pipe member 20a by enlarging and deforming the insertion member 34 into the pipe member 20a. Then, both end portions 42a of the flat portion 42 of the insertion member 34 are brought into contact with and meshed with the inner surface of the pipe member 20a, and the rotation of the insertion member 34 around the axis can be prevented. Therefore, there is no need to form a protrusion on the pipe member 20a, and there is no need to form a positioning groove or the like that meshes with the protrusion on the insertion member 34. For this reason, the pipe member 20a does not require a pressing operation or the like for creating protrusions, and the number of pipe processing steps can be reduced.

  As shown in FIG. 1, the bracket 1 is formed with a fitting hole 12 having the same shape and size as the protrusion 43 formed on the end surface 38 of the insertion member 34, and the fitting hole 12 is aligned with the protrusion 43. When the bracket 1 is inserted into the protrusion 43, the bracket 1 is assembled to the insertion member 34 by determining the mounting angle around its axis.

  Further, thereafter, the bolt 6 is passed through the fitting hole 12 of the bracket 1 and the bolt insertion hole 37 of the end face 38 in order, screwed into the nut portion 35 and tightened.

  Here, the rotation of the insertion member 4 with respect to the pipe member 20a is prohibited by meshing between both end portions 42a of the flat portion 42 of the insertion member 34 and the inner surface of the pipe member 20a. Further, the bolt 6 can be easily tightened with one screwdriver without changing the mounting angle of the bracket 1 with respect to the pipe member 20a.

  Thus, when the insertion member 34 is inserted into the end of the pipe member 20a, the bracket 1 is inserted into the insertion member 34, and the bolt 6 is tightened, the mounting angle of the bracket 1 with respect to the pipe member 20a can be determined. is there.

  The insertion member 34 in the pipe fixing device 30 shown in FIGS. 2 to 5 is formed such that the width of the protrusion 43 is substantially the same as the outer periphery of the insertion member 34. The protrusion 43 is formed in accordance with the width of the fitting hole 12 of the bracket 1. In this embodiment, the insertion member 34 in the pipe member 20a having an inner diameter (φ) of 23 mm is configured in the shape shown in FIGS.

  When the outer periphery of the insertion member 34 is larger than the protrusion 43, as shown in FIGS. 8 to 11, the protrusion 43 is formed around the insertion port of the end surface 38 of the insertion member 34, and the protrusion 43 is formed inside from the outer periphery. The end of is located. For example, the insertion member 34 used for the pipe member 20a having an inner circumference of 29.4 mm has a structure shown in FIGS. 8 is a front view showing another insertion member of the pipe fixing device, FIG. 9 is a sectional view taken along the line AA, FIG. 10 is a top view thereof, and FIG. 11 is a side view thereof.

  The insertion member 34 shown in FIGS. 2 to 5 and the insertion member 34 shown in FIGS. 8 to 11 have different outer peripheries, but basic parts such as a nut portion 35, a straight portion, and a length. Are the same, and in order to avoid duplication of description, the same parts are denoted by the same reference numerals and description thereof is omitted.

  When the inner diameter (φ) of the pipe member 20a is 29.4 mm, the cylindrical portion of the end surface portion 38 of the insertion member 34 is formed with a diameter of 29.9 mm.

Insert member 34 has a size straight portion formed of a predetermined length the same diameter from the end face 34, the hand is formed such that the small diameter toward the tip face 40 from the straight portion. The diameter of the circumferential portion of the end face 40 is about 0.5 mm smaller than the inner diameter of the pipe member 20a.

  When the inner diameter (φ) of the pipe member 20a is 29.4 mm, the distance from the flat part 42 at the center of the cylindrical part to the periphery of the opposite circumference is formed to 26.9 mm.

  Further, as shown in FIGS. 8 to 11, an oval projection 43 corresponding to the fitting hole 12 formed in the bracket 1 is continuously provided on the end surface 38. The straight portion of the protrusion 43 is formed in parallel to the straight portion of the flat portion 42 described above. The arcuate end of the protrusion 43 is located inside the outer periphery of the insertion member 34.

  FIG. 12 shows a pipe member 20a having an inner diameter (φ) of 29.4 mm into which an insertion member 34 for an inner diameter of 29.4 mm is press-fitted. The pipe member 20a has a pipe thickness of 1.2 mm. Therefore, the pipe member has an outer diameter (C portion in the drawing) of 31.8 mm.

  FIG. 13 shows a state after the insertion member 34 is press-fitted into the pipe member 20a. As described above, when the insertion member 34 is inserted into the pipe member 20a, a portion (X portion in the drawing) along the circumferential portion of the insertion member 34 of the pipe member 20a is enlarged and deformed in a circular shape. The part along the part was 32.3 mm. That is, the 0.2 mm pipe member 20 a is enlarged at the straight portion of the insertion member 34.

  And the pipe member 20a (the Y portion in the drawing) of the flat portion 42 was moved closer to the flat portion 42 side and deformed to 31.1 mm as the portion along the circumferential portion was enlarged and deformed. In other words, the 0.2 mm pipe member 20a approaches the flat portion 42 side of the insertion member 34.

  Thus, the insertion member is fixed to the pipe member 20a by enlarging and deforming the insertion member 34 into the pipe member 20a. Then, both end portions 42a of the flat portion 42 of the insertion member 34 are brought into contact with and meshed with the inner surface of the pipe member 20a, and the rotation of the insertion member 34 around the axis can be prevented.

  Next, the effect of suppressing the rotation around the axis of the pipe member 20a in the insertion member 34 according to the present invention was confirmed. For comparison, a positioning groove was provided on the insertion member, and a protrusion provided in the groove on the pipe member was prepared, the same load was applied, and the rotation angle was measured.

  The insertion member 134 for comparison will be described with reference to FIGS.

  14 is a front view showing an insertion member of a comparative pipe fixing device, FIG. 15 is a sectional view taken along the line AA, FIG. 16 is a top view, and FIG. 17 is a side view.

  Similar to the insertion member 34 of the above-described embodiment, the comparative insertion member 134 includes an end surface 138 in which a bolt insertion hole 137 is formed at the center, and a columnar portion 139 formed so as to be continuous with one surface of the end surface 138. With. A hole 141 connected to the nut portion 135 is provided on the end surface 140 opposite to the end surface 138 of the cylindrical portion 139.

  The insertion member 134 is formed of a steel material, and the diameter of the circumferential portion of the end surface 380 is formed to be about 0.5 mm larger than the inner diameter of the pipe member 20a to be press-fitted. For example, when the inner diameter (φ) of the pipe member 20a is 23 mm, the diameter is 23.4 mm, and when the inner diameter (φ) of the pipe member 20a is 29.4 mm, the diameter is 29.9 mm. Formed in size.

Insert member 134 has a straight portion formed from the end face 138 to the magnitude of a predetermined length the same size, the hand is formed such that the small diameter toward the tip face 140 from the straight portion. The diameter of the circumferential portion of the end surface 140 is about 0.5 mm smaller than the inner diameter of the pipe member 20a.

In this comparative example, the entire length of the cylindrical portion 139 of the insertion member 134 is 38 mm, and the length of the straight portion is 6 mm, as in the embodiment.
Further, as shown in FIGS. 14 to 17, the end surface 138 is provided with an oval protrusion 1430 similar to the embodiment corresponding to the fitting hole 12 formed in the bracket 1. A positioning groove 150 is linearly provided from one end surface 138 to 140 on one circumferential side of the protrusion 143. The positioning groove 140 has a width of 4 mm and a depth of 1.5 mm.

  In the pipe member 20a in this comparative example, a protrusion corresponding to the positioning groove 140 is formed at a position where the insertion member 134 is inserted.

  This insertion member 134 is press-fitted into the pipe member 20a with the positioning groove 150 and the projection of the pipe member 20a aligned with the end surface 140 side of the columnar portion 139 at the end of the pipe member 20a. The insertion member 34 is attached to the member 20a.

  If the positioning groove 150 on the outer peripheral surface of the insertion member 134 and the protrusion projecting inwardly formed in the circumferential direction of the pipe member 20a are not aligned, they cannot be sufficiently inserted into the pipe member 20a. When the member 134 is inserted into the pipe member 20a, the insertion member 134 is positioned around the axis with respect to the pipe member 20a by the engagement of the positioning groove 150 and the protrusion 18.

  Here, the rotation of the insertion member 134 with respect to the pipe member 20a is prohibited by the engagement between the positioning groove 150 and the protrusion.

  A pipe for an inner diameter of 23.0 mm and an insertion member for an inner diameter of 29.9 mm having the structure shown above are prepared for the embodiment of the present invention and for comparison. Then, the insertion member 34 and the comparative insertion member 134 according to the embodiment of the present invention are press-fitted into both ends of a pipe having an inner diameter of 23.0 mm and a pipe having an inner diameter of 29.9 mm, respectively, to suppress rotation around the axis of the insertion member. The effect was measured. Measurements shown in FIGS. 18 to 21 were prepared. 18 is a top view showing an apparatus configuration for measuring the rotation suppression effect around the axis of the insertion member, FIG. 19 is a front view thereof, FIG. 20 is a side view, and FIG. 21 is a side view showing a load application position. .

  As shown in FIG. 18, a horizontal pipe member 20a having a length of 200 mm is prepared, and insertion members 34 (134) are press-fitted and fixed to both ends. Then, a vertical pipe with an inner diameter of 10 mm for load measurement is attached to the central portion, and the test is performed with a static load concentrated at one point, weighing 5 kg from the horizontal pipe core to the position of the vertical pipe 100 mm. About angle measurement, the pipe for angle measurement was attached to the position 40 mm away from the vertical pipe for load, and the angle was measured so that interference, such as curvature of a vertical pipe itself, might not be received.

  The horizontal pipe member 20a is provided with a light iron base 200 made of steel having a height of 3 m and a thickness of 0.8 mm, and a fitting hole into which the oval protrusion 43 (143) of the insertion member 34 is fitted is provided at a position of 1200 mm. A thick stainless steel metal plate 201 was fixed by welding. Then, as shown in FIG. 19, the projection of the insertion member 34 (134) press-fitted into the horizontal pipe member 20a is fitted into the fitting hole of the metal plate member 201, and the vertical pipe is prevented from moving at the fitting hole portion. At a position where 20b is parallel to the horizontal direction, the fitting hole and the protrusion 43 (143) are fixed by welding, and rotation between the metal plate member 201 supporting the horizontal pipe member 20a and the insertion member 34 (134) is performed. Measure the change in angle due to static load in a state where there is no.

  When rotation occurs around the axis between the horizontal pipe member 20a and the insertion member 34 (134), the angle of the vertical pipe member 20b changes from the horizontal direction to the arrow direction in FIG. Therefore, it can be confirmed that the smaller the angle change, the more the rotation around the axis is suppressed.

  As shown in FIGS. 18 and 20, the vertical pipe 20b is attached by press-fitting a driving nut 210 in which a threaded hole of 8 mm is formed in the vertical pipe 20b. The vertical pipe 20b is fixed to the horizontal pipe member 20a by sandwiching a hole provided in the horizontal pipe member 20a by an R-washer 211 and using an 8 mm stainless truss bolt 212 having a length of 65 mm.

  The angle is measured using a digital angle measuring instrument. Specifically, the angle was measured using the brand name “Level Protractor No. 2” manufactured by Toei Kogyo Co., Ltd. Measurement is 0.05 degree is the lowest unit of measurement.

  Under the above-mentioned conditions, the load shown in FIG. 21 was applied by increasing the load by 5 kg from 0 kg to 75 kg, and the angle at each load was measured. The results are shown in Table 1.

  As can be seen from Table 1, when the embodiment of the present invention is compared with the comparative example, there is not much difference. Both of them rotate about 0.5 degrees, but the cause may be twisted pipes.

  Thus, according to the present invention, rotation around the axis can be suppressed even when a 75 kg load is applied. Moreover, also in this invention, it has confirmed that the suppression effect comparable as the comparative example was acquired.

  In the above-described embodiment, one flat portion 42 is formed on the insertion member 34. However, a pair of flat portions 42 may be formed opposite to each other on the circumference. By providing the pair of flat portions 42, the ends of the four flat portions 42 and the inner peripheral surface of the pipe member 20a come into contact with each other, so that rotation around the axis can be further suppressed. However, the appearance of the pipe member 20a is deformed into an oval shape at two opposing points, and may be harmful to the appearance depending on the place of use. Therefore, the number of flat portions and the like may be taken into consideration depending on the strength, application, and the like.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims for patent.

  The present invention can be used in a display device such as a store.

It is a disassembled perspective view of the hanger using the pipe fixing apparatus of this invention. It is a front view which shows the insertion member of the pipe fixing device concerning this invention. It is the sectional view on the AA line of FIG. It is a top view which shows the insertion member of the pipe fixing device concerning this invention. It is a side view which shows the insertion member of the pipe fixing device concerning this invention. It is a front view showing a pipe member having an inner diameter (φ) of 23 mm into which an insertion member for an inner diameter of 23 mm is press-fitted. It is a front view which shows the state after inserting the insertion member in a pipe member. It is a front view which shows the other insertion member of the pipe fixing apparatus concerning this invention. It is the sectional view on the AA line of FIG. It is a top view which shows the other insertion member of the pipe fixing device concerning this invention. It is a side view which shows the insertion member of the pipe fixing device concerning this invention. It is a front view showing a pipe member having an inner diameter (φ) of 29.4 mm into which an insertion member for an inner diameter of 29.4 mm is press-fitted. It is a front view which shows the state after inserting the insertion member in a pipe member. It is a front view which shows the insertion member of a comparative example. It is AA sectional view taken on the line of FIG. It is a top view which shows the insertion member of a comparative example. It is a side view which shows the insertion member of a comparative example. It is a top view which shows the apparatus structure for measuring the rotation suppression effect around the axial center of an insertion member. It is a front view which shows the apparatus structure for measuring the rotation suppression effect around the axial center of an insertion member. It is a side view which shows the apparatus structure for measuring the rotation suppression effect around the axial center of an insertion member. It is a side view which shows the position which applies the load which shows the apparatus structure for measuring the rotation suppression effect around the axial center of an insertion member. It is a disassembled perspective view which shows the conventional display apparatus. It is a disassembled perspective view which shows the conventional pipe fixing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bracket 20a Pipe member 30 Pipe fixing device 34 Insertion member 35 Nut part 38 End surface 39 Cylindrical part 40 End surface 42 Flat part 43 Protrusion 6 Bolt 12 Fitting hole

Claims (4)

In a pipe device comprising a pipe member and a pipe fixing device having a columnar insertion member inserted into an end portion of the pipe member,
In the pipe fixing device, the outer diameter of one end face of the insertion member is formed larger than the inner diameter of the pipe member, and the outer diameter of the other end face is formed to be smaller than the inner diameter of the pipe member. A flat portion having at least a part of the columnar shape is provided, and is pressed into the pipe member from the other end surface of the insertion member, and the pipe member is enlarged in a circular shape at a portion along the circumferential portion of the insertion member. The portion along the flat portion of the insertion member is deformed by approaching the flat portion side, and the insertion member is engaged with the pipe member in a state in which both end portions of the flat portion are in contact with and meshed with the inner peripheral surface of the pipe member. A pipe device characterized by being fixed to the pipe . The insertion member has a straight portion having a predetermined length and the same diameter from the one end surface, and is formed to have a smaller diameter from the straight portion toward the other end surface. The pipe device according to claim 1. The position under the said pipe member and the position of the flat part of the insertion member of the said pipe fixing apparatus are match | combined, The insertion member is press-fitted in the said pipe member, The Claim 1 or Claim 2 characterized by the above-mentioned. Pipe equipment . 2. The pipe fixing device is press-fitted at both ends of the pipe member, with the position below the pipe member and the flat portion of the insertion member of the pipe fixing device being aligned. Or the pipe apparatus of Claim 2.

Images