JPS6255494B2 - - Google Patents
Info
- Publication number
- JPS6255494B2 JPS6255494B2 JP55090982A JP9098280A JPS6255494B2 JP S6255494 B2 JPS6255494 B2 JP S6255494B2 JP 55090982 A JP55090982 A JP 55090982A JP 9098280 A JP9098280 A JP 9098280A JP S6255494 B2 JPS6255494 B2 JP S6255494B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe joint
- pipe
- socket
- face
- clamp member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011324 bead Substances 0.000 claims description 14
- 230000004927 fusion Effects 0.000 claims description 13
- 229920003002 synthetic resin Polymers 0.000 claims description 7
- 239000000057 synthetic resin Substances 0.000 claims description 7
- 229920001169 thermoplastic Polymers 0.000 claims description 7
- 239000004416 thermosoftening plastic Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 3
- 229920005989 resin Polymers 0.000 description 16
- 239000011347 resin Substances 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 14
- 238000003466 welding Methods 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7841—Holding or clamping means for handling purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
- B29C66/1162—Single bevel to bevel joints, e.g. mitre joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
- B29C66/326—Shaping the burr, e.g. by the joining tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
- B29C66/328—Leaving the burrs unchanged for providing particular properties to the joint, e.g. as decorative effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5229—Joining tubular articles involving the use of a socket
- B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
- B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/97—Checking completion of joining or correct joining by using indications on at least one of the joined parts
- B29C66/972—Checking completion of joining or correct joining by using indications on at least one of the joined parts by extrusion of molten material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/82—Testing the joint
- B29C65/8207—Testing the joint by mechanical methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、熱可塑性合成樹脂製管と熱可塑性合
成樹脂製管継手とをソケツト融着したときの接続
状態を検査する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for inspecting a connection state when a thermoplastic synthetic resin pipe and a thermoplastic synthetic resin pipe joint are socket fused together.
第1図を参照して従来技術を説明する。熱可塑
性合成樹脂たとえばポリエチレンからなる管体1
と管継手2とをソケツト融着するに当つては、そ
れらの管体1および管継手2の外周をクランプ部
材3,4でそれぞれ保持する。次いで、管体1の
端部外周1aと管継手2の受け口2aとを図示し
ないヒータで加熱した後、管体1を管継手2の受
け口2aに嵌入して両者を融着している。この嵌
入時において、管体1が予め規定された長さだけ
嵌入されると、管体1の外周1aおよび管継手2
の受け口2aの溶融樹脂が管継手2の管体1側の
端面2bに押し出される。したがつて、この溶融
樹脂が充分に押出されたときには、管体1の外周
1aと管継手2の受け口2aとが、充分に圧着さ
れて良好な融着状態が得られたことになる。 The prior art will be explained with reference to FIG. Pipe body 1 made of thermoplastic synthetic resin such as polyethylene
When socket-fusion-bonding the pipe body 1 and pipe joint 2, the outer peripheries of the pipe body 1 and pipe joint 2 are held by clamp members 3 and 4, respectively. Next, after heating the end outer periphery 1a of the tube body 1 and the socket 2a of the pipe joint 2 with a heater (not shown), the tube body 1 is fitted into the socket 2a of the pipe joint 2, and the two are fused together. At this time of fitting, when the pipe body 1 is fitted by a predetermined length, the outer circumference 1a of the pipe body 1 and the pipe joint 2
The molten resin in the socket 2a is pushed out to the end surface 2b of the pipe fitting 2 on the pipe body 1 side. Therefore, when this molten resin is sufficiently extruded, the outer periphery 1a of the tube body 1 and the socket 2a of the pipe fitting 2 are sufficiently crimped together, and a good fused state is obtained.
ところが、管継手2の受け口2aをヒータで加
熱する際に、管継手2の端面2bには受け口2a
の溶融樹脂の一部が既に流出している。しかも従
来のクランプ部材3の管継手2側の端面3aは管
体1の軸線に直角な平面状であつて、その端面3
aを管継手2の端面2bに押付けている。そのた
め、ヒータによる加熱時に流出した端面2bの溶
融樹脂と、管体1の管継手2への挿入時に流出す
る溶融樹脂とが、端面3a,2b間で押し潰され
る。しかも管体1と管継手2とは、同色であつて
かつ同一材料から成ることが多い。したがつて、
融着操作終了後に管継手2の端面2bに形成され
たビード5が、前記加熱時に生じたものか、ある
いは管体1と管継手2の融着時に生じたものかを
判別することが困難である。したがつて管体1と
管継手2とが確実に融着されているか否かを検査
することができなかつた。 However, when heating the socket 2a of the pipe fitting 2 with a heater, the socket 2a is not attached to the end surface 2b of the pipe fitting 2.
Some of the molten resin has already flowed out. Moreover, the end surface 3a of the conventional clamp member 3 on the side of the pipe fitting 2 is a planar shape perpendicular to the axis of the pipe body 1;
a is pressed against the end surface 2b of the pipe joint 2. Therefore, the molten resin on the end surface 2b that flows out during heating by the heater and the molten resin that flows out when the tube body 1 is inserted into the pipe joint 2 are crushed between the end surfaces 3a and 2b. Moreover, the pipe body 1 and the pipe joint 2 are often of the same color and made of the same material. Therefore,
It is difficult to determine whether the bead 5 formed on the end surface 2b of the pipe fitting 2 after the completion of the fusion operation was generated during the heating process or during the fusion of the pipe body 1 and the pipe fitting 2. be. Therefore, it was not possible to inspect whether the pipe body 1 and the pipe joint 2 were reliably fused together.
本発明の目的は、ソケツト融着終了後に管継手
の端面に形成されたビードの形状によつて、融着
状態を容易にかつ確実に判別することができる検
査方法を提供することである。 An object of the present invention is to provide an inspection method that can easily and reliably determine the state of fusion based on the shape of a bead formed on the end face of a pipe joint after socket fusion is completed.
以下、図面によつて本発明の実施例を説明す
る。第2図は本発明の一実施例の断面図である。
熱可塑性合成樹脂たとえばポリエチレンから成る
管体6と、熱可塑性合成樹脂たとえばポリエチレ
ンから成る管継手7とは、環状体としてのクラン
プ部材8と、クランプ部材9とによつてそれぞれ
保持される。管体6の端部外周6aと、管継手7
の受け口7aとはヒータ30(後述の第4図参
照)で加熱され、その後で管体6を管継手7の受
け口7aに嵌入して両者の融着が行なわれる。そ
して融着操作終了後に、管継手7の端面7bに形
成されたビードの形状によつて確実に融着されて
いるかどうかを判別することができる。 Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a sectional view of one embodiment of the present invention.
A tube body 6 made of a thermoplastic synthetic resin, such as polyethylene, and a pipe joint 7 made of a thermoplastic synthetic resin, such as polyethylene, are held by a clamp member 8 and a clamp member 9, respectively, as annular bodies. The end outer periphery 6a of the pipe body 6 and the pipe joint 7
The socket 7a is heated by a heater 30 (see FIG. 4, which will be described later), and then the tube body 6 is inserted into the socket 7a of the pipe joint 7 to fuse them together. After the welding operation is completed, it can be determined whether the welding has been performed reliably based on the shape of the bead formed on the end surface 7b of the pipe joint 7.
第3図は第2図の切断面線−から見た断面
図である。クランプ部材8は、管体6の外周にほ
ぼ半周ずつ接触する内周を有する一対の半割り部
材9,10を備え、両半割り部材9,10の一端
部は管体6の軸線に平行なピン11によつて相互
に支承されている。半割り部材9,10の他端部
には、ほぼ半径方向に沿つて外方に突出した突起
12,13がそれぞれ設けられる。一方の突起1
2には、レバー14が前記ピン11と平行なピン
15によつて枢支される。レバー14の途中に
は、連結環16の一端が、前記ピン15と平行な
軸線まわりに回転自在に枢支される。連結環16
の他端は他方の突起13に形成された係止溝17
に係止可能である。連結環16を係止溝17に係
止した状態で、レバー14をピン15のまわりに
第3図のごとく回動すると、半割り部材9,10
の他端部が当接して、クランプ部材8が管体6に
固定される。両半割り部材9,10の外周には、
一直径線上で半径方向外方に突出した把持棒1
8,19が固着される。 FIG. 3 is a sectional view taken along the section line - in FIG. 2. The clamp member 8 includes a pair of half-split members 9 and 10 having inner circumferences that contact the outer circumference of the tube body 6 by approximately half a circumference, and one end portion of both half-split members 9 and 10 is parallel to the axis of the tube body 6. They are mutually supported by pins 11. At the other end portions of the half members 9, 10, projections 12, 13 are provided, respectively, which protrude outward along a substantially radial direction. One protrusion 1
2, a lever 14 is pivotally supported by a pin 15 parallel to the pin 11. In the middle of the lever 14, one end of a connecting ring 16 is rotatably supported around an axis parallel to the pin 15. Connecting ring 16
The other end is a locking groove 17 formed in the other protrusion 13.
It can be locked to. When the lever 14 is rotated around the pin 15 as shown in FIG. 3 with the connecting ring 16 locked in the locking groove 17, the half members 9, 10
The other end abuts, and the clamp member 8 is fixed to the tube body 6. On the outer periphery of both half members 9 and 10,
Grip rod 1 protruding radially outward on one diameter line
8 and 19 are fixed.
クランプ部材9に関しては、クランプ部材8と
同様に構成されており、管継手7の軸線に平行な
ピン20のまわりに開閉自在である。 The clamp member 9 has the same structure as the clamp member 8, and can be opened and closed around a pin 20 parallel to the axis of the pipe joint 7.
本発明に従えば、クランプ部材8の管継手7寄
りの端面すなわち両半渡り部材9,10の端面に
は、半径方向内方寄りで内周面に開放した凹所が
形成される。クランプ部材8を管体6に固定した
状態で、クランプ部材8の端面8aには、環状の
凹所21が形成される。凹所21の半径方向に沿
う幅d1は、管継手7の肉厚d3の1/3〜3/5程度
(d1=1/3d3〜3/5d3)に選ばれる。また凹
所2
1の深さd2は0.5〜1mm程度に選ばれる。 According to the present invention, in the end face of the clamp member 8 closer to the pipe joint 7, that is, in the end faces of both half-bridge members 9 and 10, a recess is formed that is radially inward and open to the inner circumferential surface. With the clamp member 8 fixed to the tube body 6, an annular recess 21 is formed in the end surface 8a of the clamp member 8. The width d1 of the recess 21 along the radial direction is selected to be approximately 1/3 to 3/5 of the wall thickness d3 of the pipe joint 7 (d1 = 1/3 d3 to 3/5 d3). Further, the depth d2 of the recess 21 is selected to be approximately 0.5 to 1 mm.
管体6と管継手7とを融着するにあたつては、
第4図のごとく、管体6の端部外周6aと管継手
7の受け口7aとをヒータ30によつて加熱す
る。ヒータ30には、前記端部外周6aと受け口
7aとを加熱する加熱面22a,23aを有する
加熱突起22,23がそれぞれ形成されている。
両加熱突起22,23は同一軸線上で相互に反対
側に突出されている。このようなヒータ30で加
熱することによつて、管体6の端部外周6a、お
よび管継手7の受け口7aは加熱溶融される。こ
のヒータ30による加熱は、加熱面22a,23
aの温度をたとえば230〜250℃に保つて約20〜30
秒程度続けられる。 When welding the pipe body 6 and the pipe joint 7,
As shown in FIG. 4, the outer periphery 6a of the end portion of the tube body 6 and the socket 7a of the pipe joint 7 are heated by the heater 30. The heater 30 is provided with heating protrusions 22 and 23 having heating surfaces 22a and 23a for heating the end outer periphery 6a and the socket 7a, respectively.
Both heating protrusions 22 and 23 protrude in opposite directions on the same axis. By heating with such a heater 30, the end outer periphery 6a of the tube body 6 and the socket 7a of the pipe joint 7 are heated and melted. The heating by this heater 30 is performed on the heating surfaces 22a, 23
Keep the temperature of a at 230 to 250℃ for about 20 to 30 minutes.
It can last for about seconds.
ヒータ30による加熱終了後、管体6と管継手
7との間からヒータ30を外し、第5図のごとく
管体6を管継手7内に直ちに嵌入する。この際、
管継手7の受け口7aにおける開放端側で溶融し
ている一部の樹脂25は、端面7bに沿つて外方
に流出する。また管体6の端部外周6aで溶融し
ている樹脂の一部24は、端面7bで塞き止めら
れて管体6の外周に沿つて流出する。さらに、管
継手7の受け口7aで溶融している樹脂の他の一
部26は、管体6の端面に押されて管継手7の軸
線方向内方に流出する。 After heating by the heater 30 is completed, the heater 30 is removed from between the pipe body 6 and the pipe joint 7, and the pipe body 6 is immediately inserted into the pipe joint 7 as shown in FIG. On this occasion,
A portion of the resin 25 melted on the open end side of the socket 7a of the pipe joint 7 flows outward along the end surface 7b. Further, a portion 24 of the resin melted at the end outer periphery 6a of the tube 6 is blocked by the end surface 7b and flows out along the outer periphery of the tube 6. Further, another portion 26 of the resin melted at the socket 7a of the pipe fitting 7 is pushed by the end surface of the pipe body 6 and flows out inward in the axial direction of the pipe fitting 7.
第6図を参照して、クランプ部材8は、その端
面8aが管継手7の端面7bとの間に間隔l1を
有するように管体6を管継手7内に嵌入したとき
に、管体6の管継手7への予め定められた挿入長
さl2が確保される位置で、管体6の外周に固定
されている。前記間隔l1は、融着操作時に管継
手7の端面7bに流出する溶融樹脂の厚さに等し
い。 Referring to FIG. 6, when the tube 6 is fitted into the pipe fitting 7 so that the end surface 8a of the clamp member 8 has a distance 11 between the end surface 7b of the pipe fitting 7, the clamp member 8 It is fixed to the outer periphery of the pipe body 6 at a position where a predetermined insertion length l2 into the pipe joint 7 is secured. The distance l1 is equal to the thickness of the molten resin flowing out onto the end surface 7b of the pipe joint 7 during the fusion operation.
管体6の管継手7への嵌入時に、管体6の端部
外周6aと受け口7aとから管継手7の端面7b
側にはみ出す溶融樹脂は、管体6が管継手7内に
長さl2だけ嵌入されたときに、クランプ部材8
の端面8aと管継手7の端面7bとの間で挾圧さ
れる。しかも管体6の端部外周6aからはみ出し
た溶融樹脂24は、管継手7の受け口7aからは
み出した溶融樹脂25よりも半径方向内方寄りに
位置されている。そのため、クランプ部材8の端
面8aと端面7bとの間で挾圧される溶融樹脂の
うち、管体6からの溶融樹脂24は、クランプ部
材8の凹所21に入り込む。このような管体6と
管継手7との嵌合状態はたとえば約30秒保持され
た後、管体6および管継手7からクランプ部材
8,9がそれぞれ外される。 When the pipe body 6 is fitted into the pipe joint 7, the end face 7b of the pipe joint 7 is removed from the end outer periphery 6a of the pipe body 6 and the socket 7a.
The molten resin that protrudes to the side is removed by the clamp member 8 when the pipe body 6 is inserted into the pipe joint 7 by a length l2.
is clamped between the end surface 8a of the pipe fitting 7 and the end surface 7b of the pipe joint 7. Moreover, the molten resin 24 protruding from the end outer periphery 6a of the tube body 6 is located closer to the radial inward side than the molten resin 25 protruding from the socket 7a of the pipe joint 7. Therefore, among the molten resin clamped between the end surface 8a and the end surface 7b of the clamp member 8, the molten resin 24 from the tube body 6 enters the recess 21 of the clamp member 8. After such a fitted state between the tube body 6 and the pipe fitting 7 is maintained for about 30 seconds, the clamp members 8 and 9 are removed from the tube body 6 and the tube fitting 7, respectively.
第7図を参照して、融着操作終了後において、
管体6と管継手7との接続部にはビード27が形
成されている。管体6の管継手7への規定嵌入長
さl2が確保されているときには、ビード27の
半径方向内方には、管体6を外囲して突出した環
状の突部28が形成される。この突部28は管体
6の端部外周6aの溶融樹脂の一部24が凹所2
1に入り込んで形成されたものである。また、管
体6の外周へのクランプ部材8の固定が不充分で
ある場合には、管体6を管継手7内に嵌入すると
きに、管体6とクランプ部材8とが軸線方向に相
対移動する。そのため、前記間隔l1,l2を保
持したときに、管体6の規定された嵌入長さl2
が確保できない。この場合には、クランプ部材8
と管継手7の端面7bとの間に溶融樹脂が充分に
押出されず、したがつて融着操作終了後に第7図
で示すごとき突部28を備えた形状のビード27
が得られない。 Referring to FIG. 7, after the fusion operation is completed,
A bead 27 is formed at the connection portion between the pipe body 6 and the pipe joint 7. When the prescribed fitting length l2 of the pipe body 6 into the pipe joint 7 is secured, an annular protrusion 28 that protrudes around the pipe body 6 is formed radially inwardly of the bead 27. . This protrusion 28 has a part 24 of the molten resin on the outer periphery 6a of the end portion of the tube body 6 in the recess 2.
It was formed by entering 1. Furthermore, if the clamp member 8 is not sufficiently fixed to the outer periphery of the tube body 6, when the tube body 6 is inserted into the pipe joint 7, the tube body 6 and the clamp member 8 may be axially relative to each other. Moving. Therefore, when the above-mentioned intervals l1 and l2 are maintained, the specified fitting length l2 of the tube body 6 is
cannot be secured. In this case, the clamp member 8
The molten resin is not sufficiently extruded between the end surface 7b of the pipe joint 7 and the bead 27 has a protrusion 28 as shown in FIG. 7 after the fusion operation is completed.
is not obtained.
したがつて、管体6と管継手7とが充分に融着
されているか否かは、ビード27の形状を確認す
ることで容易にかつ確実に判別することができ
る。 Therefore, whether or not the tube body 6 and the pipe joint 7 are sufficiently fused can be easily and reliably determined by checking the shape of the bead 27.
次に本発明者が行なつた実験結果を述べる。こ
の実験ではポリエチレンから成る呼び径50mmの管
体6と管継手7とを融着した。ヒータ30の加熱
面22a,23aの表面温度を230〜250℃に保持
して約20秒間加熱した後、直ちにヒータ30を外
して管体6を管継手7内に嵌入した。このときの
間隔l1は1.5mmであり、嵌入長さl2は、22mm
であつた。この嵌入状態を約30秒間保持して完全
に融着した後、クランプ部材8を外すと、管体6
と管継手7との接続部には、ビード27が管継手
の外周近くまで形成され、しかもクランプ部材8
の凹所21に対応した突部28が形成されてい
た。したがつて、管体6の規定された嵌入長さl
2を確保して管体6と管継手7とを融着すると、
クランプ部材8の端面に対応したビード27が形
成されることが確認された。 Next, the results of experiments conducted by the inventor will be described. In this experiment, a pipe body 6 made of polyethylene with a nominal diameter of 50 mm and a pipe joint 7 were fused together. After heating the heating surfaces 22a, 23a of the heater 30 at 230 to 250° C. for about 20 seconds, the heater 30 was immediately removed and the tube 6 was inserted into the pipe joint 7. At this time, the interval l1 is 1.5 mm, and the insertion length l2 is 22 mm.
It was hot. After maintaining this fitted state for about 30 seconds to completely fuse, when the clamp member 8 is removed, the pipe body 6
A bead 27 is formed near the outer periphery of the pipe joint at the connection portion between the pipe joint 7 and the clamp member 8.
A protrusion 28 corresponding to the recess 21 was formed. Therefore, the specified insertion length l of the tube body 6
2 is secured and the pipe body 6 and pipe joint 7 are fused together,
It was confirmed that a bead 27 corresponding to the end surface of the clamp member 8 was formed.
本発明の他の実施例として、上述のクランプ部
材8に代えて、管体の外周に固定され管継手7側
の端面に凹所を備える環状体であつてもよく、他
のクランプ部材で管体6を保持して管継手7に嵌
入するようにしてもよい。また本発明は、上述の
実施例のごとき手動による融着だけでなく、ソケ
ツト融着機などを用いた融着に関連して実施する
ことができる。 As another embodiment of the present invention, instead of the above-mentioned clamp member 8, an annular body fixed to the outer periphery of the pipe body and having a recess on the end face on the pipe joint 7 side may be used, and another clamp member may be used to The body 6 may be held and inserted into the pipe joint 7. Furthermore, the present invention can be practiced not only in manual welding as in the embodiments described above, but also in connection with welding using a socket welder or the like.
上述のごとく本発明によれば、管継手側の端面
の半径方向内方寄りに環状の凹所を備える環状体
を、管体の端部から予め定められた長さを有する
位置で管体の外周に固定し、環状体の端面と管継
手の端面とが近接するように予め定めた圧力を加
えて管体を管継手に嵌入するようにしたので、管
体が規定された嵌入長さだけ管継手内に嵌入され
て管体と管継手とが完全に融着したときには、管
体と管継手との接続部に環状体の端面に対応した
形状のビードが形成される。また前記規定嵌入長
さが確保されず融着が不完全である場合には、前
記ビードの形状は環状体の端面に対応しない。し
たがつて、融着操作終了後に、ビードの形状を観
察するだけで容易にかつ確実に融着状態を判別す
ることができる。 As described above, according to the present invention, the annular body having the annular recess radially inward on the end face of the pipe fitting is inserted into the pipe body at a position having a predetermined length from the end of the pipe body. The pipe is fixed to the outer periphery and fitted into the pipe fitting by applying a predetermined pressure so that the end face of the annular body and the end face of the pipe fitting come close to each other, so that the pipe body can be inserted only the specified length. When the pipe body and the pipe joint are completely fused together after being inserted into the pipe joint, a bead having a shape corresponding to the end surface of the annular body is formed at the connection portion between the pipe body and the pipe joint. Furthermore, if the prescribed fitting length is not ensured and the fusion is incomplete, the shape of the bead does not correspond to the end surface of the annular body. Therefore, the fused state can be easily and reliably determined by simply observing the shape of the bead after the fusion operation is completed.
第1図は従来技術を示す断面図、第2図は本発
明の一実施例の断面図、第3図は第2図の切断面
線−から見た断面図、第4図はヒータ30に
よる加熱状態を示す断面図、第5図は管体6の管
継手7への嵌入状態を示す断面図、第6図は管体
6の管継手7への嵌入が終了した状態を示す断面
図、第7図は融着操作終了後の斜視図である。
6……管体、7……管継手、8……クランプ部
材、21……凹所、27……ビード、l1……間
隔、l2……嵌入長さ。
FIG. 1 is a sectional view showing the prior art, FIG. 2 is a sectional view of an embodiment of the present invention, FIG. 3 is a sectional view taken from the cutting plane line - in FIG. 5 is a sectional view showing a state in which the pipe body 6 is fitted into the pipe joint 7; FIG. 6 is a sectional view showing the state in which the pipe body 6 has been fitted into the pipe joint 7; FIG. 7 is a perspective view after the fusion operation is completed. 6... Pipe body, 7... Pipe joint, 8... Clamp member, 21... Recess, 27... Bead, l1... Spacing, l2... Fitting length.
Claims (1)
製管継手の受け口に嵌入して融着するときの検査
方法において、前記管継手側の端面の半径方向内
方寄りに同心でかつ環状の凹所を備える環状体
を、前記管体の端部から予め定められた長さを有
する位置で管体の外周に固定し、前記環状体の端
面と管継手の端面とが予め定められた間隔に近接
するまで管体を前記管継手に嵌入して融着し、前
記管継手の端面に生じた融着時のビード形状が前
記環状体の端面形状に対応しているか否かによつ
て融着状態を判別することを特徴とするソケツト
融着検査方法。1. In an inspection method when a thermoplastic synthetic resin tube is inserted into a socket of a thermoplastic synthetic resin pipe joint and fused, a concave concentric and annular concave radially inward on the end face of the pipe joint is provided. An annular body having an annular body is fixed to the outer periphery of the tube body at a position having a predetermined length from the end of the tube body, and the end face of the annular body and the end face of the pipe joint are at a predetermined interval. The pipe body is inserted into the pipe joint until they are close to each other and fused together, and fusion is performed depending on whether the bead shape formed on the end face of the pipe joint at the time of fusion corresponds to the end face shape of the annular body. A socket fusion inspection method characterized by determining the state.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9098280A JPS5715923A (en) | 1980-07-02 | 1980-07-02 | Testing method for welding of socket |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9098280A JPS5715923A (en) | 1980-07-02 | 1980-07-02 | Testing method for welding of socket |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5715923A JPS5715923A (en) | 1982-01-27 |
JPS6255494B2 true JPS6255494B2 (en) | 1987-11-19 |
Family
ID=14013715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9098280A Granted JPS5715923A (en) | 1980-07-02 | 1980-07-02 | Testing method for welding of socket |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5715923A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20230055316A (en) * | 2021-10-18 | 2023-04-25 | 라이트비전 주식회사 | System and method of generating tem sadp image with high discernment |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4962274A (en) * | 1988-09-10 | 1990-10-09 | Kureha Kagaku Kogyo K.K. | Process for separating alkyl-substituted naphthalene derivatives using clathrate complexes |
DE19647961C2 (en) * | 1996-11-20 | 2003-03-06 | Daimler Chrysler Ag | Joint connection of an exhaust gas pipe with a mounting flange and a method for producing the same |
-
1980
- 1980-07-02 JP JP9098280A patent/JPS5715923A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20230055316A (en) * | 2021-10-18 | 2023-04-25 | 라이트비전 주식회사 | System and method of generating tem sadp image with high discernment |
Also Published As
Publication number | Publication date |
---|---|
JPS5715923A (en) | 1982-01-27 |
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