JPS58173618A - Pipe fusion-welding machine with timer mechanism - Google Patents

Abstract

PURPOSE:To automate a fusion welding operation, by providing timers controlling automatically a time for heating and a time for pressing in a pipe fusion-welding machine, by performing on-off control automatically in linkage to a heating-fusing operation and a pressing operation, and by informing the completion of the time for the above operations by an alarming means. CONSTITUTION:In a pipe fusion-welding machine consisting of a pipe clamping unit 10 clamping a pipe P and a holder unit 95 holding a member S to be fused to fit on the pipe P, which are capable of approaching and separating from each other, the above holder unit 95 is provided with a timer mechanism which has a first switch linking to the approaching motion of the unit 95, and a first timer T1 for controlling a heating time is started when said first switch is closed, while a second timer T2 for controlling a pressing time is started when said timer T1 completes its operation. An alarming unit is operated when the operation of the first timer is completed, and is stopped when the operation of the second timer is completed. By this constitution, a fusion welding operation can be automated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention centers and fuses resin pipes (eg, polyethylene pipes or plastic pipes) together. The present invention also relates to a pipe fusion machine that fuses resin-made (eg, polyethylene) pipe joints such as sockets, cheeses, and elbows to resin pipes.

In recent years, resin pipes such as polyethylene pipes have been increasingly used as gas pipes in place of conventional metal pipes. The resin pipes can be connected directly to each other, or by sockets or elbows.

This is done by heat fusing via a resin pipe joint such as a cheese or saddle. For example, when pipes are butt-fused together, a method is used in which the joint surfaces of the two pipes are heated and melted with a heater, and the heated and melted surfaces are crimped together at a predetermined pressure. The pair of tubes crimped in this manner are completely integrated and connected after being allowed to cool for a certain period of time.

Depending on the application, such pipe fusion machines can be used as butt fusion machines (butt joining pipes), saddle fusion machines (joining saddles and pipes), or socket fusion machines (joining sockets and pipes). Although the present invention can be applied to all such fusion splicers, the explanation will be given below mainly using a saddle fusion splicer as an example for convenience.

For the first time, in such conventional fusion work, it is very important to control the heating melting time by the heater and the pressure bonding time between the molten surfaces. The optimal values for these heating melting times and crimping times are determined in advance according to the type of fusion (butt fusion, socket fusion, saddle fusion), pipe diameter, socket diameter, saddle diameter, etc. In the case of heating and melting time, whether it is longer or shorter than the predetermined optimum time, the reliability of the fused portion is impaired and the possibility of defective products increases. However, in the case of saddle fusion, the work procedure is to place a heater between the opposing end surfaces of the pipe and saddle to be fused, bring the pipe and saddle closer together in the axial direction, and press them against the heater. After heating for a specified period of time, remove the pipe and saddle from the heater.

Next, after quickly removing the heater t-ta, the pipe and saddle are moved toward each other again to press the molten surfaces together with a predetermined pressing force for a predetermined time, but since all of these operations are manual, only one person can do it. It is completely impossible for a worker to do this himself. For this reason, a worker who manages the heating melting time and crimping time has traditionally been required separately from the worker who sprays and removes the heater or crimps the pipe and saddle, and therefore a minimum of two workers are required. . If the crimping time is shorter than the predetermined value, the connection between the pipe and the saddle will be incomplete.If the crimping time is longer than the predetermined time, not only will the melting range expand more than necessary, but the amount of melting will increase. If the time is too long or shorter than the predetermined time, a sufficient amount of melting will not be obtained and welding will not be possible. In practice, the management of heating and crimping times relies on the primitive method of calling using a stopwatch, but there are times when a stopwatch operator inadvertently causes the heating time to exceed a predetermined value. Ta. Furthermore, it also saves labor by not requiring a separate worker dedicated to time management.

This poses an undesirable problem when it comes to automation.

The purpose of the present invention is to incorporate a timer t-* for automatically controlling heating time and crimping time (incorporating the timer and automatically controlling on and off in conjunction with heating melting work and crimping work,
This book attempts to provide a nine-fusion bonding machine that notifies the operator of the end of the heating time and crimping time by alarm means such as a buzzer or lamp.

As mentioned above, the heat melting time and pressure bonding time differ depending on the type of fusion, but it should be noted that in any case, the pressure bonding time is longer than the heat melting time. The invention is based on this fact.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail by taking a saddle fusion machine as an example with reference to the accompanying drawings.

Since the applicant of the present application had previously proposed a saddle fusion machine as shown in FIGS. 1 to 4, the main structure of the saddle fusion machine will be explained first with reference to this.

The saddle fusion machine basically consists of a pipe clamp section 10 and a saddle holder section 50. The pipe clamp portion 10 is a movable clamp 11 that is substantially divided into two parts by a vertical plane H.
and a solid sac clamp 13. Fixed clamp 13Fi
It has support yIIJ15.

For example, the saddle fusion machine is placed horizontally on the bottom surface G of the excavated hole together with the supporting legs 57 of the saddle holder part 50, which will be described later.
(horizontal). On the other hand, the movable clamp 11 is also provided with a spare support leg 17, which serves as a support leg when the fusion splicer is used in an upright position.

Fixed and movable clamps 13.11Vi extend in the axial direction of the pipe P, each having a width wtcit and a half St- of the outer circumference of the pipe P.
grab hold of it. The fixed clamp 13 and the movable clamp 11 are connected at fork members 25 and 27 formed at both upper ends thereof by a tightening member 19 in the shape of a round bar or square bar, for example. The tightening member 19 has a threaded rod 19A at its tip, and a clamp knob 21 with a threaded hole is attached to the threaded rod 19A.
are screwed together. The tip of the square rod 19 is the movable clamp 1
It is rotatably supported by a pivot pin 29 attached to one fork member 27. When the clamp knob 21 is thus rotated, the fixed clamp 13 and the movable clamp 11 are moved slightly closer to and further away from each other.

Hook arms 35 are pivotally attached to both lower ends of the movable clamp 11 via pivot pins 33. On the other hand, at both ends of the corresponding lower portion of the fixed clamp 13, there are fixedly installed bins 37 that are engaged with the tip hooks 35A of the hook arms 35.

An operating lever 43 is attached to the other end of the hook arm 35. The operating lever 43 is supported in a support portion 12 formed integrally with the movable clamp 11 so as to be movable up and down.

Between the clamping members 19 of the fixed clamp 13 is a clamp 3 for correcting the bending of the pipe P that can be tightened by a feed screw type knob 48.
0 is provided, but since it is not directly related to the present invention, the explanation will be omitted.

A protrusion 42 for attaching a heater 100, which will be described later, is installed on the pillar 44 on which the movable clamp IIK is installed.

A pair of parallel guide rods 51 extending perpendicularly to the pipe axis are fixed to the fixed clamp 13 of the clamp portion 10, and the saddle holder portion 50 is attached to the clamp portion 10 by a slide block (main body) 53 slidably attached to the guide rods 51. You can approach and move away from. Slide block 53
Fi has a V-shaped arm 55t extending obliquely upward, and a protrusion 59 for the heater 100 is implanted at the tip of the arm 55. The protrusions 59 are horizontally and linearly aligned with the corresponding protrusions 42 of the clamp portion 10, and these protrusions can suspend and hold the heater 100 in a predetermined position during heating and melting. Further, the end of the guide rod 51 is supported by a support leg 57. Together with the support legs 57Vi and the support legs 15 of the pipe clamp section 10, they serve as a stand when the fusion splicer is placed horizontally (FIG. 1). The slide block 53 is integrally equipped with a hollow housing l.
! l! 61 is formed, and a pair of sliders 71 are slidably inserted into a hollow cylinder 65 fitted into the horizontal hole 63 in the hollow housing part 61. The slider 71 has a positioning pin 67 that is retractable from the hollow cylinder 65 and can be engaged in a corresponding positioning hole 60 formed in the guide rod 51 as shown at position 671. Both sliders 71 are in a contact position where they are constantly pressed against each other by a barb 73.

The pin 67 is sunk inside the hollow cylinder 65.

Both sliders 71 have an inclined surface 71At, and an eccentric cam 75 is arranged between these inclined surfaces. The cam 75 is fixed to a cam shaft 79 that is rotatably supported by the hollow housing 1s61, and is rotatable together with the cam shaft 79. Both ends of the camshaft 79 protrude outside the hollow housing portion 61, and a U-shaped operation lever 81 is fixed to both of these protrusions. A handle 83 is attached to the operating lever 81. By holding the handle 83 and rotating the operating lever 81t by 90 degrees from the horizontal position to the upright position shown at 83' as shown in FIG.
Rotate 90@ to the 751 position shown in the figure.
When the slider 71 reaches the position ', the wedge action of the inclined surface 71A pushes the slider 71 outward against the spring 73, and the bottle 67 engages in the hole 60 of the guide rod 51. Expanded position 1-j 71' of both sliders 71 (Fig. 6)
It is indicated by. As a result, the saddle holder portion 50 has a guide rod 51
axial positioning is performed.

The slider block 53 has a boss portion 182 having a shaft hole 181 extending parallel to the two guide rods 51, and a press rod 85 is slidably inserted into the shaft hole 181 via a metal sleeve 183. @ can be attached.

A plate 89 is fixed to one end of the pressing rod 85 by a KFi bolt 87, and is pressed against both sliders 71 via this plate 89. The boss portion 182 has a slider tube 9
1 is slidably attached.

The slider tube 91ri has a saddle holder 95 fixed thereto by bolts 93, and the saddle 8 of a predetermined shape to be welded to the pipe Pt is fitted into the #saddle holder 95 and held therein. The saddle 8 is fixed in the holder by a knob mounting fixing screw 99. still.

In Figure 4, the fixing screw 99 is shown rotated by 90 degrees with respect to Figures 1.2.3 to make the drawing easier to understand.

The holder 95 has a central hollow boss 74 in which a spring 78 and a retainer 76 are disposed. Gene78
The other end is pressed against the pressing rod 85. The initial weight of the spring 78 is finely adjusted by an adjustment screw 112 attached to the boss 74. An inner cylinder 68 is slidably fitted into the slider 91, and its projection 68A is connected to the projection 8 of the pressing rod 85.
By being locked to 5A, the pressing rod 85 is prevented from coming out from the inner cylinder 68. The inner cylinder 68 has an actuation lever 66 screwed into it, and the # actuation lever 66 is an abbreviated long hole 64 (8) formed in the slider cylinder 91.
(Fig. 2) and protrudes to the outside. The long hole 64 is a lever 66
It has a portion 64A that defines the lock position of the lever 66, and a long hole portion 64B that allows the lever 66 to be operated. part 64
B extends in the axial direction of the pressing rod 85, and the lever 66 causes the inner cylinder 68 to move into the pressing rod 85 within the slider ffN91.
It is possible to move in the axial direction. Replace the operating spring 78 of the inner cylinder 68 (the strength of the spring 76, that is, the force with which the saddle S presses against the pipe P varies depending on the pipe P, so if the operating spring 78 exceeds the fine adjustment range by the adjustment screw 112, the operating spring 78 should be replaced). This is necessary in the case where it is necessary to replace the above, but it is not directly related to the present invention, so its explanation will be omitted.

As mentioned above, when the cam 75t is rotated, the slider 71 is gradually pushed outward and the positioning pin 67 moves into the corresponding positioning hole 60km of the guide rod 51.
After that, when cam 75 continues to rotate in 4W, cam 75H
Play) 89r Begins to push to the left in Figure 6-7. As a result, the pressing rod 85 is pushed to the left and the pin 78
is compressed to increase the compressive load (at this time, the holder 95 is pressed against the pipe P or the heater 100 via the saddle 8, so it must be moved).

The saddle is fused to the pipe as follows.

After spraying the pipe P onto the pipe clamp part 10 (the spraying operation is not directly related to the present invention and will not be described), before welding the saddle 8 to the pipe P, it is necessary to melt the welding surfaces of both. Therefore, nine concave grooves 101 correspond to the outer circumference of the pipe P.
and a concave surface 81 of the saddle 8 (corresponding to the outer periphery of the pipe P and having a round shape) and a convex surface 102 corresponding to the GC. u! The heater block 100 is hung so as to bridge the protrusion 42 of the pipe clamp s10 and the protrusion 59 of the saddle holder [50] (the heater block 100 is formed with a long groove 103 into which the protrusion 42.59 fits). On this occasion.

The saddle holder part 50 is moved close to the pipe clamp part 10 to the extent that the heater block 100 fits between the saddle holder part 50 and the heater clamp part 10. Further, the saddle S is already attached to the saddle holder 95. Next, slider block 53 is slid toward vibe clamp section 10 and brought into contact with heater block 100' t-pipe P and saddle 8. Next, pull the lever 81 using the handle 83 and you are done! The fixing pin 67 is inserted into the corresponding positioning hole 60 of the guide rod 51, and the slide block 53 of the saddle holder part 5o is inserted.
is removed from a predetermined position Vc. Furthermore, the lever 81 (handle 8
3) When t@ is raised to the position 81'(83') in the figure, a predetermined pressing force is doubled on the saddle holder 95 via the spring 78 as described above.

As a result, the heater block 100 includes the pipe P and the saddle 8.
Since the pipe P and the saddle 8 are strongly pressed against each other, the joint surfaces of the pipe P and the saddle 8 can be heated and melted by the heater block 100. After heating for the specified time, turn off the heater block
oot - To remove the lever 8 of the saddle holder part 50
1 again to the horizontal position (initial position #) and position the lid fixing pin 6.
7 and move the slider block 53 of the saddle holder portion 5o in the direction away from the pipe clamp portion 1o.

After removing the heater block 100, the slider block 53 of the saddle holder section 50 is brought close to the pipe clamp section 10 along the guide rod 51 again and brought into contact with the saddle 8t and the pipe PK. Then, when the lever 81 is raised again to the upright position, the saddle 8 is pressed against the pipe P with the required force.

After crimping for a predetermined time, the lever 81 is returned to the initial position and the pressing force is released. Eventually, the saddle 8 and the pipe PK are completely fused together as the joining surfaces are cooled (cooled down).

According to one aspect of the present invention, the saddle welding machine configured as described above is provided with a timer mechanism for automatically controlling the heating melting time and the pressure bonding time. The timer mechanism is a timer housing 130 fixedly installed in the hollow housing 61 of the saddle holder part 50.
A first tie-vTs for heating and melting time control and a second timer T2 for crimping time control are provided on the timer housing. A switch actuating rod 131 is provided within the timer housing 130 and is slidably mounted within a cylinder portion 134 formed integrally with the hollow housing 61 . This rod 131 passes through a hole 136 formed in the hollow housing 61KN and projects into the hollow housing 61, and is always connected to the cam 75 of the saddle holder portion 50 by a barb 133.
is being forced to.

The other end of the spring 133 is engaged with an end cap 139 that closes the cylinder portion 134. The rod 131 also extends slidably through the end cap 13'9. A protrusion (dog) 141 is formed on the other end of the rod 131 to operate a first switch 143 for detecting the axial position of the rod 131.

As mentioned above, be sure to press lever 818 when heating or crimping.
1' position 1i (Fig. 1) K wake up (cam 75 t-75
Since it is necessary to press the saddle 8 against the heater 100 or the pipe P (by moving to the position @J), the start of the heating work and the crimping work can be detected by the actuating rod 131. That is, the lever 81 is at the 811 position (the cam 75 is at the 751 position).
When the rod 131ti moves to the point where the cam 75 that had been acting as a stopper disappears, the spring 133
5 to the left, the protrusion 141 actuates a switch 143, for example in the form of a microswitch. An example of a control circuit for activating the alarm member 137, such as a lamp or a buzzer, after a predetermined period of time after the switch 143 starts to operate is shown in FIG.

In FIG. 11116, 153 is a power switch for the battery 151. Of course, instead of the battery 151, it may be directly connected to an external power source. Also.

R is a coil 2, rVi switch element (second switch), and the coil R and switch element r form a normally closed relay 16.
form 0. T1 is the heating time t+ (e, g25
This is a timer for setting the crimping time e (seconds).
This is a timer that sets x(e, g30 seconds).

As mentioned above, tl'>tl is always satisfied.

At the beginning of heating, when the cam 75 is pressed against the heater 100, the switch 143 is turned on by the rod 131. Therefore, at the same time as the heating starts, the timer T1 is activated and the relay 160 is turned on. is turned on.Since the relay 160 is a normally closed type, the coil R
At the same time as the current is applied to the switch element r, the switch element r is opened. Therefore, the alarm member 137 is not activated. Heating time chamber! After the time has elapsed, timer 〒1 expires: Energization to the film R is quickly cut off.

At the same time that the current to coil B is quickly cut off, switch element r
is closed, and as a result, the alarm member 137 is activated to notify all workers that heating is complete.

Next, crimping outside! However, in this case as well, the alarm member 1 is activated after K11 hours have passed, just as in the case of the heating work described above.
37 is activated. In the case of crimping work, the crimping work is continued until the timer T1 is activated without returning the lever 81 to the initial position at this point.

Timer T! begins to operate at the same time as the IK switch element r closes after time t1 has elapsed, that is, at the same time as the alarm member 137 operates. Therefore, the setting time of timer TI is 1g-1
Set t (crimping time - heating time) K.

As a result, the timer To1m-t1 time expires, and at the same time, the alarm member 137 stops operating. That is, the alarm member 1371' remains open for a period of time. In this way, the deactivation of the alarm member 137 means the completion of the crimping time.

As described above, if a buzzer is used as the alarm member 137, the completion of the heating time t1 can be known by the buzzer sounding, so the lever 81 can be quickly returned to the initial position at the same time as the buzzer sounds. Completion can be known from K when the buzzer starts to sound once and then it stops.

This shows another embodiment of the seventh @Fi alarm activation circuit, and in this embodiment, a first alarm member that indicates completion of heating and a second alarm member that indicates completion of crimping are provided separately. is a major feature.

In FIG. 7, when the power switch 153 is turned on and heating is started, the switch 143 is turned on by the operating rod 131 (FIG. 5) K as described above. @1 Relay coil TRI with timer τ1 (not shown) turns ON after time t1 (heating time), contrary to the case in FIG. 6. That is, the first timer Tl starts at the same time as switch 143 turns ON. This is a type of timer that turns ON after tl.

When the relay coil TRI turns ON, its relay contact tr
1 is closed, and at the same time, the second timer Tx (not shown) of the second timer-equipped relay coil arrangement 2 starts and the alarm member 137^ is activated.

Therefore, after the time t1, the first alarm member 137A is activated to notify the completion of heating, and the operator only has to turn off the switch 143 using the operating rod 131 (FIG. 5).

In the case of swaddling work, even if the first alarm member 137A is activated, the work may be continued until the second alarm member 137B is activated. That is, as described above, as time passes, the first
The alarm member 137A is activated, and at the same time, the second timer T starts. 2nd timer T intention @1 timer Tl
This is a timer of the type that turns ON the relay coil TR2 after K''t - ft (crimping time - heating time) time. Therefore, the relay coil TR2 turns ON after t2 from the start of EEW work, and its contacts tr2A and tr2B
is activated.

Contact tr2^, tr2Bt;! Relay coil TI'
A pair of normally closed and normally open contacts driven by L2.

That is, the normally closed contact tr2^ is opened only when the relay coil TR2 is turned on, and the normally open contact tr2B is closed only when the relay coil TR2 is turned on.

After tl, contact tr2B is closed, and at the same time, relay coil ORI is energized and its pair of relay contacts gr14er
1Bt - Activate opening/closing. Contact erlA is a normally closed contact and is opened by relay coil ORIK.

On the other hand, the normally open contact crlB is closed by the relay coil (1!R1K) in conjunction with crl^. Therefore, crl
As is clear from Figure 0, in which the second alarm member 137B is activated at the same time as the second alarm member 137B is closed, the relay coil ORI and the contact crlB will not operate unless the switch 143 is turned off, even if the contact tr2B is opened again. Construct a self-holding relay to continue. Therefore t! After contact tr
At the same time as 2A is opened, the timer system circuit (first relay coil TRI with timer system circuit and second relay coil TR2 with timer system 2) turns OFF, and as a result, T&2 becomes OFF.
When FPK occurs, the contacts tr2A and tr2B return to the initial positions shown in FIG. 7, but the second alarm member 137B continues to operate unless the switch 143t is turned off. That is,
Contacts tr2A, tr2B are momentarily activated after t snow hours and immediately return to their initial positions, but the self-holding relays (
The second alarm member continues to operate due to the action of ORI, 0rlB).

As described above, for example, the first . By using lamps of different colors as the second alarm member, the heating time and the crimping time can be easily visually distinguished and controlled.

FIG. 8 shows yet another embodiment of the embodiment shown in FIG. 7, and its operation will be briefly explained as follows.

First, during heating, power switch 153. switch 143
are both turned on. The switch 143 contacts the first contact S when it is OF1, and contacts the second contact Sm when it is ON. When switch 143 becomes fON, ill timer Tx
? Similarly to the relay coil TRII shown in FIG. 7, it becomes KON after Kt1 time. When the TRI power is turned ON, the normally open switch TRI is closed and the first alarm member 137A is activated. Nowadays, relay coil ORI is also ON.
Therefore, contacts crlA and crlB are closed. At this point, heating is complete, so return the operating rod 131t and switch f 143 tOFP 1t, immediately *,a
8t @I/C47t thin. In addition, as in the case of Fig. 7, V
C1) The relay coil CRI and the contact crl^ constitute a self-holding relay, so even if the switch 143 is returned to Sr@, the contact crZC force remains; the opening force field remains open until the 9th relay coil ORI is an excited i trench. When switch 143 is returned to 8sll, relay coil CRO is energized, contacts erQA and crOB are closed, and relay coil ORI is energized.
The contact crlB? Relay coil CR2 is energized through this. When the relay coil OR2 is energized, its contacts cr2B, cr2D, and cr2B are closed, and its contacts cr2A and cr20 are opened. At the same time as the contact cr20 is opened, the first alarm member 137A stops operating. That is, the 1111 signal member 137A stops operating at the same time as the first switch 143 is opened for the first time (returned to the contact 81 side). In addition, relay coil ○R2
and contact cr20 also constitute a self-holding relay. In addition, from the relay coil TRI with the first timer Ti to the second timer T,
Since the relay coil TR2 is switched to the attached relay coil TR2, the preparation for the crimping work is completed. Here, as the crimping work begins, the switch 143 is turned on again (for the second time) 8! When it is brought to the side, the second timer T2 of the timer relay coil TR2 starts)1
．． , turn on relay coil TR2 at tttl15f. The setting time of the second timer T in FIG. 8 is tl −
Note that it is not 1l (tl).After 3, the normally open contact tf!, which energizes the relay coil TR2, is closed.

At the same time as the second alarm member 137B is activated, the relay coil ORB is excited (the contact cr2D is a self-holding relay coil (closed by AC3)).

By operating the 211th reporting member 137B, it is possible to know that the crimping is complete. When relay coil OR3 is excited, its contact cr3 is closed. Therefore, when the switch 143 is returned to 8, @IIC when the crimping is completed, the relay coil ORO is energized.

As a result, contact crOB is closed and relay coil CR4
is excited. As a result, normally closed contacts c and r4 are opened, and all self-holding relays and @2 alarm member 137
BFiOFPK is done. In Figures 6.7.8, the relay coils and their corresponding contacts are distinguished by uppercase and lowercase letters and are indicated by the same alpha pet symbol for easy reference.

According to the present invention, the heating time and the crimping time are automatically and accurately controlled by a timer mechanism that is linked to the heating operation and the crimping operation, respectively, thereby making it possible to achieve the scaly point as described at the beginning of the back page.

In the above explanation, the switch 143 is turned on and off using the actuating rod 131 that is linked to the movement of the cam 75. However, the switch 143 is not limited to the cam 75. Of course, other movable 11sK may be interlocked.

Further, although the above description has been made with reference to a saddle fusion machine, the present invention is equally applicable to a socket fusion machine or a knot fusion machine. For example, in the case of a socket fusion machine, switch 143 is A dog for actuation may be provided on the movable clamp portion.

[Brief explanation of drawings]

#! Figure 1 is a front view showing the overall configuration of the saddle fusion machine according to the present invention, Figure 2 is a plan view of Figure 1, Figure 3 is a right side view of Figure 1, and Figure 4 is a view of Figure 1. ■-fV line sectional view, Figure 5 is a v-v line sectional view of Figure 4, Figure 6 is a line diagram showing an example of an alarm activation circuit, @Figure 7 is an alarm activation circuit different from Figure 6 FIG. 8 is a diagram showing an example of an alarm activation circuit that is further different from that shown in FIG. 7. DESCRIPTION OF SYMBOLS 10... Pipe clamp part, 11... Movable clamp part, 13... Fixed clamp part, 75... Cam, 81
... Lever, 130 ... Timer housing, 143
...Switch, 137...Alarm member, 160...
relay. Tt + 'rg...timer, P...pipe, 8.
··saddle. Patent Applicant Rex Industry Co., Ltd. Patent Attorney Akira Akiki Patent Attorney Kazuyuki Nishidate Patent Attorney Takashi Nakayama Patent Attorney Akira Yamaguchi

Claims (1)

[Claims] 1. A pipe clamp part that clamps a pipe, a holder part that holds a member to be welded to the pipe, and t-a relative position along a pair of parallel guide rods extending between the two. pipe fusion, in which the welded surfaces of the pipe and the welded member are heated and melted for a predetermined period of time, and then the fused surfaces are crimped together for a predetermined period of time to fuse the welded member to the pipe. In the machine, a timer mechanism having a first switch linked to the approach movement of the holder part is provided, and
The timer mechanism includes a first timer T1 for controlling heating time that starts when the first switch is closed. A second timer T for crimping time control starts when the first timer ends! 1. A pipe fusion machine with a timer mechanism, comprising: and an alarm member that operates at the same time as the first timer expires and stops operating at the same time as the second timer expires. 2. A vibe clamp part that clamps a pipe and a holder part that holds a member to be welded to the pipe are arranged so that they can approach and separate from each other along a pair of parallel guide rods extending between them. In a pipe welding machine that welds a member to be welded to a pipe by heating and melting the welding surfaces of the pipe and the member to be welded for a predetermined time and then pressing the melted surfaces together for a predetermined time, A timer mechanism having a first switch linked to the approach movement is provided, and d
The timer mechanism includes a first timer T for controlling heating time that starts when the $1 switch is closed. a second timer T8 for crimping time control that starts when the first timer ends, a first alarm member that operates at the same time as the first timer ends and stops operating at the same time as the second timer ends, and a second timer that starts when the second timer ends; A pipe fusion machine with a timer mechanism has a second alarm member which operates when the first switch is opened and stops the operation when the first switch is opened. 3. A vibe clamp part that clamps a pipe and a holder part that holds a member to be welded to the pipe are arranged so that they can approach and separate from each other along a pair of parallel guide rods extending between them. In a pipe welding machine that welds a member to be welded to a pipe by heating and melting the welding surfaces of the pipe and the member to be welded for a predetermined period of time and then crimping the fused surfaces together for a predetermined period of time, the holder f is used. ! A timer mechanism having a first switch linked to the approaching movement of the 6VC is provided, and the timer mechanism includes a first timer T1 for controlling heating time that starts when the first switch is closed for the first time;
A ts2 timer T for crimping time control starts when the first switch is closed for the second time after the first switch is opened after the heating time has ended, and a ts2 timer T for crimping time is activated at the same time as the first timer ends and is activated by opening the first switch for the first time. A pipe fusion machine with a timer mechanism, comprising a first alarm member that stops, and a second alarm member that operates at the same time as the second timer ends and stops operating when the first switch is opened a second time.