JPS5938023A - Socket bonder - Google Patents

Abstract

PURPOSE:To raise the quality and yeild of products as well as to prevent maloperations by a method in which a lock mechanism to automatically control heating and bonding operations is mechanically built in, and before or after the lapse of a given time period, the succeeding operations are locked. CONSTITUTION:A pipe clamp 10 or a socket clamp 50 is slid toward the counterpart one by means of a handle 23 or 63, and a heater block 100 is contacted with and fitted into a pipe P and a saddle S. After the periphery of the pipe end and the inner surface of the socket are heated for a given period of time t1 by the heater, both the clamps are separated from the heater block and the heater block 100 is quickly removed out. The inner surface end of the socket S is contacted with inserted with the peripheral end of the pipe P and bonded. After the bonding for a given period of time t3, the pressing force is released, the joint faces are cooled, and the socket S is completely hot-bonded with the pipe P. In short, unless a given period of time is passed or after a given period of time is passed, the succeeding operations are stopped to prevent the occurrence of maloperations.

Description

[Detailed description of the invention]

The present invention relates to a socket fusion machine for welding a pipe joint called a socket made of resin (eg, IJ ethylene) to a resin pipe (eg, polyethylene pipe or plastic pipe). In recent years, resin pipes such as polyethylene pipes have been increasingly used as gas pipes instead of conventional metal pipes. The resin pipes are connected to each other by heat fusion through resin pipe joints such as sockets (there are various shapes such as straight or erect). In other words, the sockets are connected to the resin pipes. In the case of fusion, a method is used in which the joint surfaces of the stomach and socket are heated and melted with a heater, and the heated and melted surfaces are crimped together. The thus crimped tube and socket are allowed to cool for a certain period of time, and then are completely integrated and connected. A socket fusion machine is generally used for such connection work. A socket fusion machine basically has a pipe clamp device that clamps a pipe and a socket clamp device that clamps a socket, and both of these clamp devices lt are connected by a pair of parallel guide rods so that they can approach and separate from each other. . In conventional fusing operations for paddy rice, it is very important to control the heating melting time using a heater and the pressure N# between the melting surfaces. These heating melting time and crimping time are the pipe diameter,
The optimum value is determined in advance according to the socket diameter, etc., and especially in the case of heating and melting time, if the time is longer or shorter than the predetermined optimum time, the reliability of the fused part may be impaired and the product may be defective. sexuality becomes greater. However, the work procedure for socket fusion is as follows: 1. Place the heater between the opposing end surfaces of the mother tube and the socket to be fused, 2. Bring the tube and socket closer together and press them against the heater. Since the outer circumference is melted, and the socket is melted on its inner circumference, the joint surface of the nosoid and the socket (the outer circumference of the socket and External surface and inside socket + i￥1 surface)
After the pipe and socket are heated for a predetermined period of time until they are melted, the pipe and socket are separated from the heater, and then, after the heater is removed, the pipe and socket are moved toward each other again to press the molten surfaces together for a predetermined period of time. However, all of these tasks are manual, so it is completely impossible for a single worker to do it. For this reason, a worker who manages the heating melting time and crimping time has traditionally been required separately from the worker who installs and removes the heater or crimps the nozzle and socket, and therefore a minimum of two workers are required. there were. If the crimping time is shorter than the predetermined value, the connection between the pipe and the socket will be incomplete, and if the heating time is longer than the predetermined time, not only will the melting range expand more than necessary, but the melting side will become too large. If the time is shorter than the specified time, sufficient melting time will not be obtained and welding will not be possible. In practice, the management of heating time and crimping time relies on the primitive method of calling using a stopwatch, so stopwatch operators may inadvertently

[-] The heating time sometimes exceeded the predetermined value. Furthermore, the need for a separate worker dedicated to hourly wages is also an undesirable development in terms of labor saving and automation. The object of the present invention is to incorporate a locking mechanism that automatically controls heating work and crimping work into a machine, and to automatically control the locking mechanism to turn on and off in conjunction with heating melting work and crimping work, so that a predetermined time elapses. Product quality can be improved by preventing work errors due to worker skill or carelessness by not allowing subsequent work to be carried out until after the work has been completed, or after a predetermined period of time has elapsed. If you improve the retention, it will be K. Hereinafter, a socket fusion machine equipped with a locking mechanism according to the present invention will be described in detail with reference to the accompanying drawings. □Illustration (1st~
The socket fusion machine shown in FIG. 4) basically consists of a tube clamp device 110 that clamps the tube P and a socket clamp device 50 that clamps the socket S. These two clamping devices are connected to each other so as to be able to approach and separate from each other by a pair of parallel guide rods 3 provided on the machine base 1. The pipe clamping device 10 is divided into two parts around the pivot 1iII111.
The fixed clamp half-rest part 13 is slidably attached to the guide rod 3Vc. Both clamps half rest part 1
3.15 is a position diametrically opposed to the pivot shaft 11 and is fixedly tightened by a crankshaft 17. One end of Clamp Gelt 7 is connected to the Ii'iJ fixed clamp resting parts 13, and by rotating the clamp knob 19, the entire movable clamp half resting part can be pressed by the clamp ship 191c, and both clamp half resting parts can be tightened. A heater receiver 21 is provided on the movable clamp half-rest part 15 to receive a heater 00 to be described later. In addition, 23 is a pipe clamp device @
10f: A handle used when moving toward the socket clamp device 50. Like the pipe clamp 10, the socket clamp device 3150 is also composed of a pair of fixed clamp half-rest portions 53 and a movable clamp half-break portion 55 that can be divided into two parts around the busy pivot pin 51. The movable clamp half-rest part 55 and the fixed clamp half-rest part 53 are diametrically opposite to each other with respect to the pivot pin 51 11411
At this point, they are removably connected by a torque tightening device 70. Socket clamp? JN#, 50 is pipe P and socket)
For centering with S, the entire assembly is movable vertically and horizontally. Therefore, the identification clamp is half-closed [53 #'i Slider (reciprocating table) 59 that is slidably attached to the guide rod 3 of the machine base 1 The slider 59 is attached to the support member (i5) so that the position can be adjusted.
For example, a vertical dovetail groove 66 is provided on the support 65 fixed to the
is formed, and the fixed clamp half-rest part 53 is fitted into this dovetail groove. The torque tightening device 70 controls the tightening force for clamping the socket S to a predetermined value (unless the tightening force is increased to a certain extent, the socket may slip or shift relative to the clamp when the socket is pressed against the pipe or heater). On the other hand, since the socket is made of resin, if it is clamped too tightly, it may crush or crush the paper, so the clamping force cannot be increased unnecessarily), but this is not directly related to the present invention. A detailed explanation of the internal structure will be omitted. Basically, the torque tightening device aj70 may be a tightening gel. The fixed clamp half-rest part 53 is held at a predetermined height position by the support body 65.
A lock lever 6B is provided for fixing to. The locking lever 68 has a locking screw 62 which is passed through a corresponding hole (not shown) formed in the fixed clamp half-rest and a corresponding threaded hole (not shown) formed in the support body 65. By turning the lock lever 68, the support body 65 is strongly pressed against the fixed clamp half-rest part 53, and as a result, the identification clamp half-rest part and the support body are integrally fixed. A handle 63 for moving the socket clamp device 50 toward the stomach lanzo device 10 is attached to the slider 59. The movable clamp half-rest part 55 has a pipe clamp iF#t.
A heater receiver 56 similar to the heater receiver 21 of io is provided. No. 9 The operation of fusing the socket to the ide is carried out as follows. Pi IP and socket S respectively/Mother Eve clamp part 1
0 and the socket clamp part 50 (the installation work is not directly related to the present invention and will not be described), and before being fused to the socket St-pipe P, it is necessary to melt the welding surfaces of both. Therefore, a beater (Pro, Ri) 100 having an inner diameter end into which the outer periphery of the mother ide P is inserted and an outer diameter end which fits into the inner periphery of the socket S is installed.
KL is hung so as to bridge between the first socket (protrusion) 21 and the heater socket (projection) 56 of the socket clamp part 50 (the heater block 100 has a long groove into which the projections 2 and 56 fit). . Holding the U-shaped handle 23 or the handle 63, slide the /4' tube clamp portion 10 or the socket clamp portion 50 toward each other so that the heater block 11Q is brought into contact with the tube plate P and the saddle 8Fc. In this way, the outer phase of the /'P ide end and the inner periphery of the socket are heated and melted by the heater for a predetermined period of time. Predetermined time tl
When heating is completed, pull the socket clamp part and the tube clamp part away from the heater block and quickly remove the heater block 100. This heater removal work needs to be done quickly. What if I took the trouble to heat it up and melt it? This is because the fused surfaces of the ide and saddle cool down rapidly. After removing the heater lock 00, the socket holder part 50 is again moved along the guide rod 3.3 to /4' IDECLANE f part 104C, and the outer peripheral end of the pipe P is inserted into contact with the inner peripheral end of the socket S and crimped. If t2 is the time from when the heater is removed until the start of crimping the socket to the mother ide P, t2 is 3 to 5 at the latest.
It is desirable that the time is within seconds. The above-mentioned heating and melting time t1 varies depending on the nominal diameter of the arm and socket, but is generally jt=20 to 25 seconds. After pressing for a predetermined time t3 (t3 is generally us>30 seconds), the pressing force is released. In addition, the above pressing force is generally Hunt 9
This is done by holding the wheels 23 and 63 and drawing them together by hand. Eventually, the joint surface is cooled (cooled) and the socket S is fully welded to /4'ide PK. Conventionally, in the above-mentioned socket 2-toe mounting machine (the above structure itself has already been applied for by the applicant), for example, it was unavoidable to remove the heater, which took more than t2 seconds.
After the second time has elapsed, the socket is crimped to the wrong side, and due to carelessness or inexperience on the part of the outside contractor, the heater is removed before the t1 second time has elapsed, resulting in insufficient heating and melting. I fused the socket to the pipe and had problems with it clumping. All of these degrade the quality of the product and essentially necessitate redoing the bonding work. In order to solve this problem, the present invention is characterized by providing a locking mechanism that prevents the next operation from being performed until or after a predetermined period of time has elapsed. In short, in the present invention, as mentioned above, the work of sliding the socket clamping device 50 (or the 9-Igukurande device 10) along the guide rod 3 is always involved during the heating and melting work, the heater removal work, and the socket crimping work. With this in mind, this sliding movement is forcibly locked at a predetermined time so that the subsequent work cannot be started until or after a predetermined time has elapsed. This opening mechanism will be explained below (see also Fig. 5-6). The opening mechanism according to the present invention has an actuator in the form of a solenoid switch 71 fixed to the machine base 1. At the tip of the plunger 73 of the solenoid switch 71, a lever 75 having an elongated hole 74 is connected to the pin 77 of the plunger 73.
are rotatably linked together via. The other end of the lever 75 is the tip of an eccentric shaft 81 rotatably supported on the machine base 1.
It is fixed to part 11 and part 8. The eccentric shaft 81 has an eccentric shaft portion 81B that extends parallel to the guide rod 3 and has retaining irregularities such as grooves, notches, or threads formed on the outer periphery. On the other hand, the slider 59 is fixedly provided with a bushing 83 having a concave and convex portion 84 on its inner circumference that engages with the engagement concave and convex portions. As shown, a clearance 89 is formed.As will be described later, when the solenoid 71 is energized and turned ON, the solenoid plunger Jr73 protrudes to the 73' position as shown in Figure M5, and as a result, the lever 75 rotates to the 75' position, causing the eccentric shaft 8 to rotate.
] by the same angle clockwise. As a result, the uneven portion of the eccentric shaft portion 81B of the eccentric shaft 81 becomes dull! Engaged with the corresponding concave and convex portion 84 of L83, the slider 59 can no longer move in the axial direction of the guide rod 3. In this manner, the eccentric shaft 81 and the bushy 83 are engaged only when the solenoid 71 is activated, forming a clutch that prevents the movement of the slider 59 and, therefore, the movement of the socket clamp portion 50. When the solenoid 71 is inactive, there is a clearance 89 between the bushy 83 and the eccentric shaft 81, so they do not interfere with each other at all.
Therefore, the slider 59 can be freely moved along the guide rod 3. A control signal S for turning on and off the solenoid switch 71 is applied to a microswitch 914CJ provided on the slider 59, for example. A rod 95 extending parallel to the guide rod 3 is fixed to the machine base 1, and a rod 95 is mounted on the rod 95, for example, from the position of the socket clamp device 50 during heating and melting to the position of the socket clamp device during socket crimping. A dog 97 of extending width W is preferably adjustable in position by an adjustment screw 99. Therefore, when heating and melting the socket and crimping the socket, the socket clamp part 5
0 toward the IDECLANZO section 10, the microswitch detector (roller) 93 comes into contact with the dog 97, the microswitch 91 is turned on, and the ON signal S can be sent to the control@]50. Next, the operation of the locking mechanism will be explained (see Fig. 7-8). FIG. 7 shows an example of the control box 150. First, a timer Tl + Tl + Tl with a digital display is displayed.
+T4 heat melting time t, l heater removal time t2+
Set the crimping time t3 and cooling time t4. The cooling time t4 may be, for example, 180 seconds or more.In the illustrated embodiment, the changeover switch 15 is set according to the pipe diameter and socket diameter.
3 allows two types of time settings (tl = 20 or 2
5 seconds), but it is not necessary to do so. Note that 151 is a power switch. After setting the heater block 100 at a predetermined position, the socket clamp part 50 is slid toward the pipe clamp part 10 to bring the heater block 1110 into fitting contact with the pipe P and the socket S. At this time, the micro switch MS
W91 is turned on by dog 971C, and as a result, solenoid 71 is activated, and eccentric shaft 8] and bushing 83 are engaged and locked. At the same time, the timer T1 is activated and the locked position is maintained until the set time t1 is reached. Therefore, even if an operator mistakenly attempts to remove the socket clamp device 50 from the heater in order to stop the heating and melting at 11+ when t1 seconds have elapsed, the socket clamp device 50 cannot be returned to its original state due to the engagement between the bushy 83 and the eccentric shaft 8. At the same time as the predetermined heating and melting time of 1 m has elapsed, the solenoid switch 71 is turned off and the locking mechanism is released. As a result, the operator can return the socket clamp device 50 to its initial position at any time (FIG. 8(A)). When the socket clamp device 50 is returned to the initial position, the microswitch 91 is removed from the dog 97, so it is turned off, and at the same time, the timer T2 is activated. After removing the heater block 100, move the old socket clamp part 50 along the guide rod 3 to the new part 10.
(socket) S to touch the pipe P. At this time, the microswitch 91 is turned on again by the toggle 97, and the slider 59 of the socket clamp device is locked by the excitation of the solenoid switch 71. At the same time, a timer T3 is started and counts the crimping time t3. Therefore, the lock is released until the fixed time t3 has elapsed, and due to the worker's carelessness, the socket clamp group [50] cannot be returned to its initial position before the crimping time is completed. The clamping device 50 can be returned to the initial position and the pressing force can be released. Simultaneously with this unlocking, a timer T4 starts 7 and counts a cooling (cooling) time t4. The timer T4 is simply used to tell the operator whether or not a predetermined cooling time has elapsed (so that, for example, the socket can be moved to another location). On the other hand, power

[After wetting and melting is completed, it takes time to return the socket clamp device to the initial position and then remove the heater block (12), and it takes t9.
If more than a certain amount of time elapses, a signal is sent to the solenoid switch and the locking mechanism is automatically activated. Therefore, the socket clamping device 50 cannot be moved and therefore the socket cannot be crimped onto the heater. In this way, if the product is not worn after t2 hours or more, it can be rejected as a defective product, or it can be reheated by mild heating and melting. In that case (when time t4 has elapsed), it is preferably indicated by a buzzer or a lamp so that the operator is informed.Thus, according to the present invention, the heating time and the crimping time can be controlled f@I. The locking mechanism linked to the heating work and the crimping work, respectively, can solve the problems mentioned at the beginning, such as the operator's inadequacy of attention and the difference in feeling. In addition, the above fraudulent i-socket clamp IP, M, 51)
We have explained the case of moving the t/IP clamp device toward the socket clamp device.
−. Explanation, lock contact slide (71, 73, 75,...81
83) and a detection mechanism for heating work and crimping work (91° may be provided on the side of the bending device. Also, 1. The microswitch 91 is turned on at 5:00 on the first contact with the dog 97 (outbound trip), and the second At the time of the second contact (return trip)
By incorporating a binary counter that turns off K into the control box 150 button, the dog 97 has a width W as shown in FIG.
It is not necessary to have one small dog, and it is also possible to arrange one small dog on the front side (on the right side in FIG. 4) of the position of the socket clamp device 50 during heating and melting.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the overall structure of the pipe joint fusion splicer according to the present invention, Fig. 2 is a left side view of Fig. 1, Fig. 3 is a right side view of Fig. 1, and Fig. 4 is a 1 is a plan view, FIG. 5 is a view seen from the direction of arrow V in FIG. 4 (however, the lever is shown with imaginary lines for ease of understanding), and FIG. Vl-V
L line break yaw l, 71st hit: No. A diagram showing the display panel section of the control gex shown in FIGS.
! FIGS. 8(A) and 8(B) are flowcharts of the operation of the socket fusion machine according to the present invention. 3...Guide rod, lO...Pipe clamp device, 50...
- Socket clamp device, 53... Identification clamp half-rest part, 55... Movable flange half-rest part, 71... Solenoid V, 75... Lever, 81... Eccentric shaft, 83...
・Bush, 91...Micro switch, 97...Dog. Patent Applicant Rex Kogyo Co., Ltd. Patent Application Agent Akira Aomi Patent Attorney Kazuyuki Nishidate Patent Attorney Kyosuke Tsuchiyama Patent Attorney Akira Tsuchiyama 5 Figure 6 □ Figure 7

Claims (1)

[Claims] A device for clamping an armrest with a stomach
4' Socket that holds the socket to be fused to Eve. The pipe and socket clamp devices are arranged so that they can be approached and separated from each other along a pair of parallel guide rods extending between them, and the fused surfaces of the pipe and the socket are heated and melted by a heater for a predetermined time (tl), and then a predetermined time is set. Remove the heater within (t2) /J? The molten surfaces of the eve and socket are held together for a predetermined time (ts
) In a socket fusion machine that welds sockets together after crimping, there is a detection means for detecting the relative approach and separation movement between the two clamping devices, and a detection means that operates in response to a signal from the nuclear detection means. and a clutch means for blocking relative movement of both clamp devices at a predetermined time. fusion splicer.