JPWO2012066801A1 - Pipe joint - Google Patents

Abstract

Provided is a pipe joint in which a pipe material can be continuously and firmly gripped without the vicinity of the opening end portion of the split joint being separated from each other, thereby forming a pipe structure having excellent strength. A pipe joint that includes at least two or more cylindrical parts that are orthogonal to each other, and in which a pipe material is fitted and inserted into the cylindrical part, and a plurality of pipe materials are connected to each other so as to be orthogonal to each other. A pipe is formed by combining a split joint that is divided into a plurality of parts so as to sandwich the pipe material, and fastening the opposing split joints with a screw that penetrates the split joint and a nut that is screwed into the screw. A material is gripped, and a convex strip extending in the longitudinal direction of the pipe material inserted into the cylindrical portion is formed on the outer peripheral surface of the cylindrical portion.

Description

  The present invention relates to a pipe joint for producing a structure (assembly) by connecting a plurality of pipe members.

  Conventionally, metal pipe materials and resin pipe materials are used, and these are connected via pipe joint members to form an assembly, which is used as a framework for various carts, shelves, work tables, conveyors, etc. Yes.

  In particular, various types of carts, shelves, racks, and the like are widely used in factories and logistics sites using pipe joints that connect a plurality of pipe materials orthogonally.

  There are various types of pipe joints, but it consists of a plurality of members that can be divided and fastened by sandwiching the pipe material between the members, thereby connecting the pipe members together. Is often used.

  The split type joint shown in the following Patent Document 1 is an example thereof, and one through fitting cylinder and one dead fitting cylinder provided with two wedge-shaped protrusions in the circumferential direction on the inner periphery are stopped and fitted. Cross-joined by a joining tube continuously provided at one end of the tube, and the through fitting tube and the stationary fitting tube are divided so as to position both axes in one plane and divided into two segments; and A bolt in which both segments pass through the joining cylinder, a joint connected by a nut screwed to the joint, a through pipe inserted into the through fitting cylinder of the joint, and a stop pipe inserted into the stationary fitting cylinder are the bolts. It is characterized by being connected by tightening both segments with nuts.

  Further, the pipe coupling structure shown in Patent Document 2 below proposes a further improved pipe joint configuration, in which one through fitting cylinder and one to four stationary fitting cylinders are stopped fitting cylinders. Cross-joined by a joining tube continuously provided at one end of the two, and the adjacent through-fitting tube and the stationary fitting tube are divided so as to position both axes in one plane and divided into a plurality of segments, and A joint that is connected by a bolt in which adjacent segments pass through the joining cylinder and a nut that is screwed to the joint, a through pipe that is inserted through the through fitting cylinder of the joint, and a stop pipe that is inserted into the stationary fitting cylinder. In the joint-pipe coupling structure in which adjacent segments are joined by the bolts and nuts, the protrusions or protrusions provided on the inner periphery of the through-fitting cylinder are outside the through-pipe. And a protrusion or projection provided on the inner periphery of the stop fitting cylinder is engaged with a groove or recess provided on the outer periphery of the stop pipe. It is.

JP 2000-046019 A JP 2004-169775 A

  In these conventional pipe joints, in the vicinity of the open end of the cylindrical portion, the two segments that can be divided often warp in a direction away from each other. If it does so, the force which grips a pipe material will weaken, and it will come off easily, and there exists a possibility that the pipe structure (assembly) formed by this may collapse. In this regard, if the pipe structure is used over a long period of time, the force for gripping the pipe material is weakened over time, and the pipe structure may suddenly collapse one day. In addition, as the pipe and the nut are tightened more strongly in order to firmly hold the pipe material, the open end portions of the two segments that can be divided are more likely to warp away from each other.

  The present invention has been made to overcome the above-described problems, and the pipe material can be continuously and strongly gripped without the vicinity of the open ends of the split joints (segments) being separated from each other. An object of the present invention is to provide a pipe joint that can form an excellent pipe structure.

  In order to solve the above-described problems, a pipe joint according to the present invention includes at least two or more cylindrical portions that are orthogonal to each other, and pipe materials are inserted into the cylindrical portions so that a plurality of pipe members are orthogonal to each other. The cylindrical joint is formed by combining a split joint that is divided into a plurality of parts so as to sandwich the pipe material, and a screw that penetrates the split joint and the screw A pipe member is gripped by fastening opposing split joints with nuts to be screwed together, and a protrusion extending in the longitudinal direction of the pipe member inserted into the cylindrical portion is formed on the outer peripheral surface of the cylindrical portion. It is characterized in that a strip is formed.

  According to the pipe joint according to the present invention, the convex section extending in the longitudinal direction of the pipe material is formed on the outer peripheral surface of the cylindrical portion, so that the section modulus of the portion is increased, and the strength of the cylindrical portion is increased. This improves the possibility that the vicinity of the open end of the split joint is deformed in a direction away from each other. Thereby, a pipe material can be firmly held continuously and a pipe structure excellent in strength can be formed.

  In the pipe joint according to the present invention, the ridge portion may be formed inside a quadrangle formed by a tangent line at the left and right side ends of the outer peripheral surface of the cylindrical portion and a tangent line at the upper and lower ends.

  In this way, when a pipe structure is produced using the pipe joint according to the present invention and this is used for various carts, shelves, work tables, conveyor frames, etc., the protrusions protrude unnecessarily. Therefore, there is no possibility that an article or a container placed on a worker's hand, a cart, or the like frequently hits and causes a problem.

  Furthermore, in the pipe joint according to the present invention, each cylindrical portion is divided into two parts through the central axis of the cylinder, and the protruding portion is approximately 45 degrees from the split surface from the center of the cylinder. It can also be formed in an angled direction.

  In this way, since the thickness of the protruding portion can be sufficiently ensured, the strength of the cylindrical portion is increased, and a pipe joint having higher strength is obtained.

  As described above, according to the pipe joint according to the present invention, the projecting strip portion extending in the longitudinal direction of the pipe material is formed on the outer peripheral surface of the cylindrical portion, so that the section modulus of the portion increases, and the cylindrical shape The strength of the portion is improved, and the possibility that the vicinity of the open end of the split joint is deformed in a direction away from each other is reduced. Thereby, a pipe material can be firmly held continuously and a pipe structure excellent in strength can be formed.

It is explanatory drawing which shows an example of the pipe structure (assembly) produced using the pipe joint which concerns on this invention. An embodiment of a pipe joint concerning the present invention is shown, (A) is a perspective view showing the state where a pipe material was grasped, and (B) is the elements on larger scale. It is explanatory drawing which shows a mode that a pipe material is gripped in the pipe joint shown in FIG. It is a perspective view which shows one split joint of the pipe joint shown in FIG. FIG. 5 is a six-sided view of the split joint shown in FIG. 4. In the split joint shown in FIG. 4, it is the (B) aa sectional view taken on the line of the front view shown to (A), the (C) bb sectional view, and the (D) cc sectional view. It is an enlarged view of the VII part in FIG. It is an enlarged view of the VIII part in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an example of a pipe structure (assembly) produced by using a pipe joint 1 according to the present invention. A plurality of pipe materials P are connected via a pipe joint 1 to form a pipe structure S. Is forming. As shown in FIG. 1, this pipe joint 1 connects a plurality of pipe members P in directions orthogonal to each other, and can be freely combined in the vertical, horizontal, and height directions by combining pipe materials P of various lengths. It can be assembled into various forms.

  In general, the pipe material P is often used in which the outer peripheral surface of a tubular member having a perfectly circular cross section is covered with a synthetic resin material. As the tubular member, a steel material such as aluminum, iron, or stainless steel, a metal pipe made by combining these materials, a pipe formed of ceramics, synthetic resin, or the like is used. As the synthetic resin material for covering the outer peripheral surface of the tubular member, a synthetic resin material such as thermoplastic polyester such as AS resin, AAS resin, ABS resin, nylon resin, urethane resin, polyethylene terephthalate, polybutylene terephthalate, etc. is used. However, a relatively soft synthetic resin material such as polyethylene or polypropylene can also be used.

  The pipe joint 1 grips a plurality of pipe materials P so as to be orthogonal to each other, and includes a cylindrical portion that satisfies the number and shape necessary for the pipe member P. The pipe member P is inserted into the cylindrical portion and gripped. It is intended to make it. Thereby, as shown in FIG. 1, a plurality of pipe materials P can be freely connected in the vertical, horizontal, and height directions to form a pipe structure S having an arbitrary form.

  2 to 6 show an example of an embodiment of the pipe joint 1. As shown in FIG. 2, the pipe joint 1 in this embodiment grips two pipe members P1 and P2 so as to be orthogonal to each other. This pipe joint 1 is a combination of two split joints 2 shown in FIG. 4. As shown in FIG. 3, the two split joints 2 are opposed to each other, and two pipe materials P1, P2 are used. The screw 28 and the nut 29 are used for fastening.

  The pipe joint 1 can be formed of a synthetic resin material such as thermoplastic resin such as AS resin, AAS resin, ABS resin, nylon resin, urethane resin, polyethylene terephthalate, and polybutylene terephthalate. Depending on the required performance, other synthetic resin materials, various metal materials, ceramics, etc. may be used as appropriate.

  FIG. 5 is a six-sided view showing the split joint 2 in this embodiment, with the inner side as the front, (A) front view, (B) plan view, (C) left side view, (D) right side. The figure, (E) bottom view, and (F) rear view are shown.

  6 is a cross-sectional view taken along line (B) aa, a cross-sectional view taken along line bb, and a cross-sectional view taken along line cc in FIG. It is shown.

  Hereinafter, the pipe joint 1 in this embodiment will be described in more detail with reference to these drawings.

  As shown in FIGS. 2 to 6, the pipe joint 1 of this embodiment includes a first cylindrical portion 21 and a second cylindrical portion 22. The first cylindrical portion 21 is provided with a columnar cavity portion 210 that is open to the left and right, and is configured to fit and hold an intermediate position of the pipe material P1. The second cylindrical portion 22 is provided with a columnar cavity portion 220 that opens downward, and the end portion of the pipe material P2 is fitted into and held in the cavity portion 220. Both pipe materials can be connected so as to be orthogonal to each other with the end portion of the pipe material P2 abutting against the pipe material P1.

  At the end of the split surface of the two split joints 2 on the first cylindrical portion 21 side, there are a convex part 214 extending in the direction of the opposing split joint 2 and widening toward the tip part. A concave portion 215 that is recessed in the opposite direction and widens in the depth direction is formed, and by engaging the convex portion 214 and the concave portion 215 with the concave portion 215 and the convex portion 214 of the opposing split joint 2, respectively, It is assumed that the movement of the two split joints 2 in a direction away from each other can be restricted.

  A through hole 225 that penetrates from the outer peripheral surface of the split joint 2 is formed on the second cylindrical portion 22 side of the split surface of the two split joints 2, and a screw 28 is inserted into the through hole 225. can do.

  As a result, first, the convex portions 214 and the concave portions 215 of the two opposing split joints 2 are engaged as described above, and the pipe member P1 and the second cylindrical portion 22 are respectively inserted into the first cylindrical portion 21 and the second cylindrical portion 22. After positioning P2, the screw 28 is passed through the through-holes 225 of the two split joints 2, and the nut 29 is screwed into this and fastened, so that the two split joints 2 are connected to the pipe members P1 and P2. Is held firmly.

  Convex ridges 213 and 223 are respectively formed on the outer peripheral surfaces of the two split joints 2 fastened in this way. That is, on the outer peripheral surface of the first cylindrical portion 21, a protruding strip 213 extending in the longitudinal direction of the pipe material P1 is formed, thereby increasing the section modulus of the first cylindrical portion 21 and increasing the strength. .

  Further, a convex strip 223 extending in the longitudinal direction of the pipe material P <b> 2 is formed on the outer peripheral surface of the second cylindrical portion 22, thereby increasing the sectional modulus of the second cylindrical portion 22 and improving the strength. To do. In particular, in the second cylindrical portion 22 that grips the end portion of the pipe material, the open end portions of the cylindrical portion 22 of the two split joints 2 facing each other tend to be separated from each other. That is, usually, in this type of pipe structure or pipe material connection structure, a pipe material having an outer diameter slightly larger than the inner diameter of the hollow portion in the cylindrical portion is used, and the cylindrical portion is formed on the surface of the pipe material. The pipe material is firmly held by pressing the coated synthetic resin material having flexibility. Therefore, due to the restoring force of the pressed synthetic resin material, a force in a direction in which the opening end portions of the second cylindrical portion 22 in the two split joints 2 are separated from each other tends to work. The tighter the screw 28 and nut 29 are, the more easily the opening ends are separated from each other, and there is a high possibility that the opening ends are gradually separated from each other due to the long-term use of the pipe structure.

  In this regard, in the pipe joint according to the present invention, since the protruding strips 213 and 223 are formed on the outer peripheral surfaces of the cylindrical portions 21 and 22, the strength is improved and the open end portions of the cylindrical portions 21 and 22 are formed. There is less risk of separation.

  As shown in FIGS. 5D and 5E, the ridges 213 and 223 in this embodiment form an angle of 45 degrees with the split surface of the split joint 2 from the cylindrical center of the cylindrical parts 21 and 22. It is formed so as to swell in a substantially semicircular cross section in the forming direction. The raised shape of the ridge portion is not limited to this, and the horizontal direction on the outer peripheral surfaces of the first cylindrical portion 21 and the second cylindrical portion 22 shown in FIGS. 5 (D) and (E). Any thickness and shape may be used within a range surrounded by tangents and vertical tangents (L1 and L2 or L3 and L4 shown in FIG. 5).

  Moreover, in the pipe joint 1 of this embodiment, as shown in FIG. 2 (B), in a state where the two split joints 2 are opposed to each other, the base end side of the second cylindrical portion 22, that is, A gap 3 that gradually increases between the two split joints 2 is opened from the opening end toward the opposite side. By doing so, when the two split joints 2 are opposed and combined, and the screw 28 and the nut 29 are tightened strongly, the open ends of the second cylindrical portion 22 and the open end are The opposite side, that is, the opposed convex part 214 and concave part 215 are strongly pressed. And especially in the opening edge part of the 2nd cylindrical shape part 22, while the opening parts of the two split joints 2 are pressed strongly, as mentioned above, on the outer peripheral surface of the 2nd cylindrical shape part 22, it is convex. Since the portion 223 is formed and the opening end portions are not easily deformed in the direction of separating, the pipe material P2 is gripped very strongly by the two split joints 2.

  Further, in this embodiment, the inner peripheral surfaces of the first cylindrical portion 21 and the second cylindrical portion 22 in the vicinity of the opening ends are orthogonal to the length directions of the pipe materials P1 and P2, respectively. Plural ridges 217 and 227 are formed. The protrusions 217 and 227 press and hold the pipe materials P1 and P2 so as to bite into the synthetic resin layer on the outer peripheral surface of the pipe materials P1 and P2, so that the pipe materials P1 and P2 move in the length direction. This prevents the pipe materials P1 and P2 from coming off.

  Furthermore, projections 218 and 228 having shapes as shown in FIG. 5 are formed on the inner peripheral surfaces of the first cylindrical portion 21 and the second cylindrical portion 22 at the back of the protrusions 217 and 227. Yes. The protrusions 218 and 228 press and hold the pipe materials P1 and P2 so as to bite into the synthetic resin layers on the outer peripheral surfaces of the pipe materials P1 and P2, and thereby rotate the pipe materials P1 and P2 in the circumferential direction. In addition, the movement in the length direction can be prevented, and the pipe materials P1 and P2 can be prevented from coming off.

  Further, a window hole 216 penetrating from the back center portion to the inner peripheral surface is formed in the back center portion of the first cylindrical portion 21 of each split joint 2. When the pipe material P1 is fastened by the pipe joint 1, if the center position of the pipe material P1 to be gripped by the pipe joint 1 is recorded on the surface in advance, the center position can be accurately determined by looking at the window hole 216. It can be easily confirmed whether or not In addition, after the pipe material P1 is fastened by the pipe joint 1, the pipe P1 can be fastened more firmly by screwing or riveting using the window hole 216.

  Further, a hole 226 is formed on the outer peripheral surface near the opening end of the second cylindrical portion 22. After the pipe material P2 is fastened by the pipe joint 1, the pipe P2 can be fastened more firmly by screwing or riveting using the window hole 226. In addition, this hole part 226 may penetrate to the internal peripheral surface of the 2nd cylindrical shape part 22, and does not need to penetrate like this embodiment.

  A convex rib 229 is formed on the outer peripheral surface of the second cylindrical portion 22. The convex rib 229 is aligned with the position of the innermost part of the cavity 220 of the second cylindrical portion 22, and when the two split joints 2 are opposed to each other and fastened, Thus, it is possible to easily confirm whether or not the pipe material P2 is inserted into the innermost part of the cavity 220 from the gap that can be formed.

FIG. 7 is an enlarged view of a portion VII in FIG. The pipe joint 1A shown in this figure has these three pipe materials P1, P2, P3 orthogonal to each other in a state where the ends of the two pipe materials P2, P3 abut against the pipe material P1. Are connected. The pipe joint 1A includes two sets of a split joint 2A disposed outside the pipe structure S, a split joint 2B disposed inside the pipe structure S, and two sets of the two split joints 2A and 2B. A screw 28 and a nut are provided. By combining these two split joints 2A and 2B, the first cylindrical portion 21A for inserting and holding the intermediate position of the pipe material P1 and the second end for inserting and holding each end of the pipe materials P2 and P3, respectively. The cylindrical portion 22A and the third cylindrical portion 23A are configured. One convex strip 213A extending in the longitudinal direction of the pipe material P1 is provided on the outer peripheral surface of the first cylindrical portion 21A, and a plurality of protrusions 213A extending in the longitudinal direction of the pipe material P2 are provided on the outer peripheral surface of the second cylindrical portion 22A. A plurality of ridges 233A extending in the longitudinal direction of the pipe material P3 are respectively formed on the outer circumferential surface of the ridge 223A and the third cylindrical portion 23A. These ridges 213A, 223A, 233A increase the section modulus of each cylindrical portion 21A, 22A, 23A and improve the strength of each portion. In FIG. 7, the same components as those of the pipe joint 1 described in FIGS. 2 to 6 are denoted by the same reference numerals.

FIG. 8 is an enlarged view of a portion VIII in FIG. The pipe joint 1B shown in this figure is a state in which each end of the four pipe materials P2, P3, P4, and P5 is abutted against the pipe material P1, and these five pipe materials P1 to P5 are connected to each other. It connects so that it may orthogonally cross. The pipe joint 1B uses four split joints 2B arranged inside the pipe structure S among the two split joints 2A and 2B constituting the pipe joint 1A shown in FIG. By combining 2B in a cross shape and fastening with four sets of screws 28 and nuts 29, a first cylindrical portion 21B for inserting and gripping an intermediate position of the pipe material P1, and each end of the pipe materials P2 to P5 Are inserted into and held by second to fifth cylindrical portions 22B to 25B. In addition, in this pipe joint 1B, since the four pipe materials P2 to P5 are connected around the pipe material P1, the first cylindrical portion 21B has a configuration as shown in FIGS. There are no ridges 213, 213A, and a plurality of ridges 223B, 233B, 243B extending in the longitudinal direction of the pipe members P2-P5 only on the outer peripheral surfaces of the second to fifth cylindrical portions 22B-25B, respectively. , 253B are formed. These ridge portions 223B, 233B, 243B, 253B increase the section modulus of each cylindrical portion 22B, 23B, 24B, 25B and improve the strength of each portion. In FIG. 8, the same components as those of the pipe joints 1 and 1A described in FIGS. 2 to 7 are denoted by the same reference numerals.

  As mentioned above, although one embodiment was illustrated and explained about the pipe joint concerning the present invention, of course, the present invention is not restricted to this embodiment, and various forms etc. are changed in the range which does not deviate from the meaning of the present invention. It is possible to do.

  The present invention is applicable to various forms of carts and shelves, racks, work tables, conveyor frames, and the like used in factories and logistics sites, for example.

DESCRIPTION OF SYMBOLS 1 Pipe joint 2 Split joint 21 1st cylindrical shape part 213 Projection part 22 2nd cylindrical shape part 223 Projection part P1 Pipe material P2 Pipe material

Claims (3)

A pipe joint comprising at least two or more cylindrical portions orthogonal to each other, and fitting a pipe material into the cylindrical shape portion to connect a plurality of pipe materials so as to be orthogonal to each other,
The cylindrical joint is formed by combining a split joint that is divided into a plurality of parts so as to sandwich the pipe material, and a split joint that is opposed by a screw that penetrates the split joint and a nut that is screwed to the screw. It is made to hold the pipe material by fastening each other,
A pipe joint characterized in that a convex strip extending in the longitudinal direction of a pipe material fitted into the cylindrical portion is formed on the outer peripheral surface of the cylindrical portion.   2. The pipe joint according to claim 1, wherein the ridge is formed inside a quadrangle formed by a tangent at a left and right side end and an tangent at an upper and lower end of the outer peripheral surface of the cylindrical portion. . Each said cylindrical shape part is divided | segmented into 2 divisions through the cylindrical central axis,
3. The pipe joint according to claim 1, wherein the ridge portion is formed in a direction that forms an angle of approximately 45 degrees with the dividing surface from the center of the cylinder.

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