JPH0134142B2 - - 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 can be used to butt and fuse resin pipes (e.g., polyethylene pipes or plastic pipes) together, or to attach resin pipe joints (e.g., polyethylene) such as sockets, cheeses, and elbows to resin pipes. This invention relates to a pipe fusion machine that performs fusion.

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 are connected to each other by heat fusing them directly or through resin pipe joints such as sockets, elbows, cheeses, saddles, etc. That is, for example, when pipes are butt-fused together, a method is used in which the joint surfaces of both pipes are heated and melted with a heater, and the heated and melted surfaces are crimped together under 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 are classified into butt fusion machines (butt joining pipes), saddle fusion machines (joining saddles and pipes), and socket fusion machines (joining sockets and pipes). Although the present invention can be applied to all such fusing machines, the explanation below will mainly take a saddle fusing machine as an example for convenience.

However, in the conventional fusion work, it is very important to control the heating and melting time using a heater and the time for pressing the molten surfaces together. Optimum 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, the work procedure for saddle welding is to place a heater between the opposing end surfaces of the pipe and saddle to be welded, bring the pipe and saddle closer together in the axial direction, and press them against the heater to melt the welded surfaces of the pipe and saddle. After heating for a specified period of time, pull the pipe and saddle away from the heater.
Then, after quickly removing the heater, the pipe and saddle are moved toward each other again to bring the molten surfaces into pressure contact with each other with a predetermined pressing force for a predetermined period of time, but all of this work is done manually, so only one worker can do it. It is simply impossible to do so. Therefore, 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 pipe and saddle, and therefore a minimum of two workers are required. Ta. If the crimping time is shorter than the predetermined value, the connection between the pipe and the saddle 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 amount of melting will become too large. Furthermore, if the time is shorter than the predetermined time, a sufficient amount of melting cannot be obtained and welding becomes impossible. In practice, the heating time and crimping time are managed by relying on the primitive method of calling with a stopwatch, so that sometimes the stopwatch operator becomes distracted and the heating time exceeds a predetermined value. Furthermore, the need for a separate worker dedicated to time management also poses an undesirable problem in terms of labor saving and automation.

An object of the present invention is to incorporate a timer that automatically controls heating time and crimping time into a machine, and to automatically control the timer on and off in conjunction with heating and melting work and crimping work, and to provide an alarm means such as a buzzer or a lamp. Accordingly, it is an object of the present invention to provide a fusing machine that notifies an operator of the end of the heating time and the crimping time.

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

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.

The applicant of the present application has previously proposed a saddle fusion machine as shown in FIGS. 1 to 4, and the construction of the main parts of the saddle fusion machine will first be explained with reference to this.

The saddle fusion machine basically consists of pipe clamp part 1.
0 and a saddle holder part 50. The pipe clamping section 10 has a movable clamp 11 and a fixed clamp 13 which are substantially divided into two by a vertical plane H. The fixing clamp 13 has support legs 15, which together with support legs 57 of a saddle holder section 50 (to be described later) serve to horizontally place the saddle fusion machine, for example, on the bottom surface G of an excavated hole. 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.

The fixed and movable clamps 13 and 11 extend in the axial direction of the pipe P, and each grips a half of the outer circumference of the pipe P over the width W. 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, for example, a round bar or a square bar. The tip of the tightening member 19 is formed as a threaded rod 19A, and a clamp knob 21 with a threaded hole is screwed onto this threaded rod 19A. The tip of the square rod 19 is the movable clamp 11
It is rotatably supported by a pivot pin 29 attached to a fork member 27. Thus clamp knob 2
1, the fixed clamp 13 and the movable clamp 11 are moved slightly toward and 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, pins 37 are fixedly provided at both ends of the corresponding lower portion of the fixed clamp 13, with which the tip hooks 35A of the hook arms 35 engage. An operating lever 43 is attached to the other end of the hook arm 35. The operating lever 43 is the movable clamp 11
It is vertically movably supported within a support portion 12 that is integrally formed with.

A clamp 30 for correcting the bending of the pipe P, which can be tightened by a feed screw knob 48, is provided between the tightening members 19 of the fixed clamp 13, but since it is not directly related to the present invention, a description thereof will be omitted.

A protrusion 42 for attaching a heater 100, which will be described later, is installed on a support 44 installed in the movable clamp 11.

A pair of parallel guide rods 51 extending perpendicularly to the pipe axis are fixed to the fixed clamp 13 of the clamp section 10, and the saddle holder section 50 is attached to the clamp section 10 by a slide block (main body) 53 slidably attached to the guide rods 51. You can approach and move away from. The slide block 53 has a V-shaped arm 55 extending obliquely upward.
A protrusion 59 for the heater 100 is implanted at the tip. The protrusions 59 are horizontally 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 connected to a support leg 57.
Supported by The support leg 57 is used together with the support leg 15 of the pipe clamp section 10 when the fusion splicer is placed horizontally (first
(Figure). Slide block 53
A hollow housing part 61 is formed integrally with the hollow housing part 61, and a horizontal hole 6 is formed in the hollow housing part 61.
A pair of sliders 71 are slidably inserted into the hollow cylinder 65 fitted into the hollow cylinder 65 . The slider 71 is a positioning pin 6 that can freely protrude and retract from the hollow cylinder 65.
7, which pin 67 can engage a corresponding positioning hole 60 formed in the guide rod 51, as shown at position 67'. Both sliders 71 are in a contact position where they are constantly pressed against each other by a spring 73, and the pin 6
7 is sunk inside the hollow cylinder 65.

Both sliders 71 have an inclined surface 71A, and an eccentric cam 75 is arranged between these inclined surfaces. cam 75
is fixed to a camshaft 79 that is rotatably supported by the hollow housing portion 61, and is rotatable together with the camshaft 79. Both ends of the camshaft 79 are connected to the hollow housing portion 6.
1, and a U-shaped operating lever 81 is fixed to both ends of the projection. A handle 83 is attached to the operating lever 81. Holding the handle 83, the first
As shown in the figure, when the operating lever 81 is rotated 90 degrees from the horizontal position to the upright position shown at 83', the cam 7
5 is rotated 90 degrees to the 75' position shown in FIG. When the cam 75 reaches the 75' position, the slider 71 is pushed outward against the spring 73 by the wedge action of its inclined surface 71A, and the pin 67 engages in the hole 60 of the guide rod 51. The expanded position of both sliders 71 is indicated by 71' (FIG. 6). As a result, the saddle holder portion 50 is positioned in the axial direction of the guide rod 51.

The slider block 53 has a boss portion 182 having a shaft hole 181 extending parallel to both guide rods 51.
and a metal sleeve 183 in the shaft hole 181.
A pressing rod 85 is slidably attached via the . A plate 89 is fixed to one end of the pressing rod 85 by a bolt 87, and is pressed against both sliders 71 via this plate 89. A slider tube 91 is slidably attached to the boss portion 182. The slider tube 91 has a saddle holder 95 fixed thereto by bolts 93, and a saddle S of a predetermined shape to which the pipe P is to be fused is fitted and held in the saddle holder 95. The saddle S is fixed in the holder by a knobbed fixing screw 99. In FIG. 4, the fixing screw 99 is shown rotated by 90 degrees with respect to FIGS. 1, 2, and 3 to make the drawing easier to understand.

Holder 95 has a central hollow boss 74 within which spring 78 and its retainer 76 are disposed. The other end of the spring 78 is pressed against a pressure rod 85. The initial load 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 cylinder 91.
The projection 68A is engaged with the projection 85A of the pressing rod 85, so that the pressing rod 85 is prevented from slipping out from the inner cylinder 68. The inner cylinder 68 has an actuation lever 66 screwed therein, and the actuation lever 66 projects to the outside through a substantially L-shaped elongated hole 64 (FIG. 2) formed in the slider cylinder 91.
The elongated hole 64 has a portion 64A that defines the lock position of the lever 66 and an elongated hole portion 64B that allows the lever 66 to be operated. The portion 64B extends in the axial direction of the pusher rod 85 and allows the lever 66 to move the inner cylinder 68 within the slider barrel 91 in the axial direction of the pusher rod 85. Such inner cylinder 68
To operate, replace the spring 78 (depending on the strength of the spring 76,
That is, since the pressing force of the saddle S against the pipe P differs depending on the pipe P, it is necessary to replace the spring 76 when it exceeds the fine adjustment range by the adjustment screw 112. Since there is no direct relationship, the explanation will be omitted.

As described above, when the cam 75 is rotated, the slider 71 is gradually pushed outward and the positioning pin 67 is fitted into the corresponding positioning hole 60 of the guide rod 51. After that, the cam 75 is further rotated. As the cam 75 continues, the cam 75 moves the plate 89 to the sixth position.
In Figure 7, it begins to move to the left. As a result, the pressing rod 85 is pushed to the left, compressing the spring 78 and increasing the compressive load (at this time, the holder 95 does not move because it is pressed against the pipe P or the heater 100 via the saddle S).

The saddle is fused to the pipe as follows.

After attaching the pipe P to the pipe clamp part 10 (the attachment work is not directly related to the present invention and will not be described), before welding the saddle S to the pipe P, it is necessary to melt the welding surfaces of both. Therefore, the concave groove 101 corresponding to the outer circumference of the pipe P and the concave surface of the saddle S
Heater block 10 having a convex surface 102 corresponding to S' (having a shape corresponding to the outer circumference of pipe P)
0 is applied so as to bridge the protrusion 42 of the pipe clamp part 10 and the protrusion 59 of the saddle holder part 50 (the heater block 100 is formed with a long groove 103 into which the protrusions 42 and 59 fit). On this occasion,
The saddle holder part 50 is connected to this and the heater clamp part 1.
The heater block 100 is placed close to the pipe clamp part 10 within a range where the heater block 100 can be placed between the pipe clamp part 10 and the pipe clamp part 10. Moreover, the saddle S is already attached to the saddle holder 95. Next, slide the slider block 53 toward the pipe clamp section 10 and remove the heater block 10.
0 is brought into contact with the pipe P and the saddle S. Next, when the lever 81 is pulled by the handle 83, the positioning pin 67 is inserted into the corresponding positioning hole 60 of the guide rod 51, and the slide block 53 of the saddle holder portion 50 is locked in a predetermined position. Furthermore lever 8
1 (handle 83) to the position 81'(83') in FIG. 1, 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 is strongly pressed against the pipe P and the saddle S.
00 allows the joint surfaces of the pipe P and saddle S to be heated and melted. After heating for a predetermined time, in order to remove the heater block 100, the lever 81 of the saddle holder section 50 is returned to the horizontal position (initial position) to release the lock by the positioning pin 67, and the slider block 53 of the saddle holder section 50 is moved to the pipe clamp section 10. Just move it in the direction away from.

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 the saddle S is brought into contact with the pipe P. Then, when the lever 81 is pulled up again to the upright position, the saddle S 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, as the joint surface cools down (cools down), the saddle S
is completely fused to the pipe P.

According to the present invention, in the saddle fusion machine configured as described above, a timer mechanism is provided to automatically control the heating melting time and the pressure bonding time. The timer mechanism has a timer housing 130 fixedly installed in the hollow housing 61 of the saddle holder part 50, and a first timer T ₁ for heating and melting time control is mounted on the timer housing.
and a second timer _T2 for crimping time control.
Inside the timer housing 130 is a hollow housing 6.
A switch actuating rod 131 is provided which is slidably mounted within a cylinder portion 134 integrally formed with the switch actuating rod 131. This rod 131 passes through a hole 136 formed in the hollow housing 61 and projects into the hollow housing 61, and is constantly pressed against the cam 75 of the saddle holder portion 50 by a spring 133.
The other end of the spring 133 is engaged with an end cap 139 that closes the cylinder portion 134. Rod 131 also extends slidably through end cap 139. A protrusion (dog) 141 is formed at the other end of the rod 131 to operate a first switch 143 for detecting its axial position.

As mentioned above, when heating or crimping, it is necessary to raise the lever 81 to the 81' position (Fig. 1) (turn the cam 75 to the 75' position) and press the saddle S against the heater 100 or the pipe P. , the start of the heating operation and the crimping operation can be detected by the actuating rod 131. That is, the lever 81 is
When the rod 131 moves to the 1' position (the cam 75 is at the 75' position), the cam 75 that had been acting as a stopper disappears, and the rod 131 is moved to the left in FIG. Switch 1 in the form of a switch
43 is activated. 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 operating is shown in FIG.

In FIG. 6, 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. Further, R is a coil, r is a switch element (second switch), and the coil R and switch element r form a normally closed relay 160. T ₁ is the heating time t ₁ (e.
T ₂ is a timer for setting the crimping time t ₂ (e.g. 30 seconds). As mentioned above, t ₂ >t ₁ is always satisfied.

First, when starting heating, place the saddle S on the heater 10.
When the cam 75 comes to the cam 75' position to press 0, the switch 143 is turned on by the rod 131. Therefore, timer T ₁ is activated at the same time as heating starts.
is activated and relay 160 is turned on. relay 16
0 is a normally closed type, so the switch element r opens at the same time as the coil R is energized. Therefore, the alarm member 137 is not activated. Timer starts after heating time t ₁ elapses.
_T1 is cut off, and the current to coil R is cut off. At the same time as the current to coil R is cut off, switch element r closes, and as a result, alarm member 137 is activated to notify the operator that heating is complete.

Next, the process moves on to the crimping operation, and in this case as well, the alarm member 137 is activated after the elapse of time _t1 , just as in the case of the heating operation described above. In the case of crimping work, the lever 81 is not returned to its initial position at this point and the crimping work is continued until timer _T2 is activated.
The timer T ₂ starts operating at the same time as the switch element r closes after the elapse of time t ₁ , that is, at the same time as the alarm member 137 is activated. Therefore, the set time of timer T ₂ is set to t ₂ - _{t 1} (crimping time - heating time).
As a result, the timer T ₂ expires after t ₂ -t ₁ time has elapsed, and at the same time, the alarm member 137 stops operating. That is, the alarm member 137 continues to operate for a period of time t ₂ -t ₁ . 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 returned to the initial position as soon as the buzzer sounds, and the completion of the crimping time _t2 can be indicated. Completion can be indicated by the buzzer once starting and then stopping.

FIG. 7 shows another embodiment of the 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. This is a major feature.

In FIG. 7, when the power switch 153 is turned on and heating starts, the switch 1 is turned on as described above.
43 is turned ON by actuating rod 131 (Fig. 5)
be made into Relay coil TR1 with a first timer T ₁ (not shown) turns ON after time t ₁ (heating time), contrary to the case in FIG. That is, the first timer
_T1 is a type of timer that starts at the same time as the switch 143 turns on and turns on after _t1 .
When relay coil TR1 turns ON, its relay contact tr1 is closed, and at the same time, the second timer T ₂ of relay coil TR2 with second timer (not shown)
starts and the alarm member 137A is activated.
Therefore, after _t1 hour, the first alarm member 137A is activated and notifies the completion of heating, so the operator must press the activation rod 13.
1 (FIG. 5) to turn off the switch 143.

In the case of crimping 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, when the time _t1 elapses, the first alarm member 137A is activated, and at the same time, the second timer _T2 is started. Similarly to the first timer _T1 , the second timer _T2 also activates the relay coil _TR2 after t2 - _t1 (crimping time - heating time).
This is a type of timer that is turned on. Therefore, _t2 after the start of the crimping operation, the relay coil TR2 is turned on and its contacts tr2A and tr2B are activated. Contacts tr2A and tr2B are a pair of normally closed and normally open contacts driven by relay coil TR2, respectively. In other words, normally closed contact tr2A is connected to relay coil TR2
It is opened only when tr2B turns ON, and the normally open contact tr2B
is closed only when relay coil TR2 is turned on. After _t2 , contact tr2B is closed, and at the same time, relay coil CR1 is energized to open and close the pair of relay contacts cr1A and cr1B. contact cr
1A is a normally closed contact and is opened by relay coil CR1, while normally open contact CR1B is opened by CR1A.
It is closed by relay coil CR1 in conjunction with . Therefore, at the same time as cr1B is closed, the second
Alarm member 137B is activated. As is clear from the figure, the relay coil CR1 and the contact cr1B constitute a self-holding relay that continues to operate even if the contact tr2B is opened again unless the switch 143 is turned off. Therefore, contact tr2A after _t2
At the same time, the timer system circuit (timer T ₁
The first relay coil TR1 with timer T2 and the second relay coil TR2 with timer _T2 ) are turned OFF, so that
When TR2 turns OFF, contacts tr2A and tr2
B returns to the initial position shown in FIG. 7, but the second alarm member 137B continues to operate unless the switch 143 is turned off. That is, the contacts tr2A and tr2B are momentarily activated after _t2 hours and immediately return to their initial positions, but the second alarm member continues to operate due to the action of the self-holding relays (CR1, Cr1B).

As described above, for example, by using lamps of different colors as the first and second alarm members, 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, both the power switch 153 and the switch 143 are turned on. The switch 143 contacts the first contact S ₁ when it is OFF, and contacts the second contact S ₂ when it is ON. When the switch 143 is turned on, the relay coil TR1 having the first timer _T1 is turned on after t1 time as in FIG. ₇ . TR1 is
When turned ON, the normally open switch tr1 is closed and the first
Alarm member 137A is activated. At this time, relay coil CR1 is also turned on, so contact cr
1A and cr1B are closed. At this point, heating is complete, and therefore the actuating rod 131 is returned to bring the switch 143 to the OFF position, ie, to the contact _S1 side. In addition, as in the case of Fig. 7, the relay coil CR
1 and contact cr1A constitute a self-holding relay, so even if switch 143 is returned to the _S1 side, relay coil CR1 remains energized unless contact cr2C is opened. When the switch 143 is returned to the _S1 side, the relay coil CRO is energized, so the contact cr
0A and cr0B are closed, and relay coil CR2 is excited via contact cr1B, which is closed by relay coil CR1. When the relay coil CR2 is energized, its contacts cr2B, cr2D, and cr2E are closed, and its contacts cr2A and cr2C are opened. At the same time as the contact cr2C is opened, the first alarm member 13
7A stops operating. That is, the first alarm member 13
7A stops its operation at the same time as the first switch 143 is opened for the first time (returned to the contact _S1 side). Note that the relay coil CR2 and contact cr2C also constitute a self-holding relay. In addition, from the relay coil _TR1 with the first timer T1 to the relay coil TR with the second timer _T2
2, the preparation for crimping work is completed.
Here, when the switch 143 is brought to the _S2 side again (second time) with the start of the crimping work, the second timer _T2 of the timer-equipped relay coil TR2 starts, and after _t2 hours, the relay coil TR2 is turned ON. do.
The setting time of the second timer T ₂ in Fig. 8 is t ₂ - t ₁
Note that t ₂ and not t 2. When relay coil TR2 is energized after _t2 , normally open contact tr2 is closed, activating second alarm member 137B, and simultaneously energizing relay coil CR3 (contact cr2D
is closed by self-holding relay coil CR2). Completion of crimping can be known by operating the second alarm member 137B. relay coil
When CR3 is energized, its contact cr3 is closed.
Therefore, when the switch 143 is returned to the _S1 side again (second time) upon completion of crimping, the relay coil CR0
is energized, and as a result, contact cr0B is closed and relay coil CR4 is energized. The result is a normally closed contact
cr4 is opened, and all self-holding relays and second alarm member 137B are turned off. still,
In FIGS. 6, 7, and 8, relay coils and their corresponding contacts are distinguished by uppercase and lowercase letters and are indicated by the same alphanumeric symbols for ease of reference.

Thus, according to the present invention, the heating time and the crimping time can be automatically and precisely controlled by a timer mechanism that is linked to the heating operation and the crimping operation, respectively, thereby solving the problems mentioned at the beginning.

In the above explanation, the switch 143 is controlled to be on/off using the actuating rod 131 that is linked to the movement of the cam 75. Of course, it may be linked to a movable part.

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

[Brief explanation of drawings]

Fig. 1 is a front view showing the overall configuration of the saddle fusion machine according to the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a right side view of Fig. 1, and Fig. 4 is the same as Fig. 1. Fig. 5 is a sectional view taken along the - line of Fig. 4, and Fig. 6 is a sectional view taken along the - line of Fig. 4.
7 is a diagram showing an example of an alarm activation circuit, FIG. 7 is a diagram showing an example of an alarm activation circuit different from that shown in FIG. 6, and FIG. 8 is a diagram showing an example of an alarm activation circuit different from that shown in FIG. Figure shown. 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,
T ₁ , T ₂ ...timer, P...pipe, S...saddle.

Claims (1)

[Claims] 1. A pipe clamp section that clamps a pipe and a holder section that holds a member to be welded to the pipe are relatively approached along a pair of parallel guide rods extending between them. In a pipe fusion machine that welds a pipe and a member to be welded by heating and melting the welding surfaces of the pipe and the member to be welded for a predetermined period of time, and then pressing the melted surfaces together for a predetermined period of time. , 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;
It is characterized by having a second timer _T2 for crimping time control that starts when the first timer ends, and an 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. A pipe fusion machine with a timer mechanism. 2. A pipe clamp part that clamps a pipe and a holder part that holds a member to be welded to the pipe are arranged so as to be able to approach and separate from each other along a pair of parallel guide rods extending between them. , in a pipe fusion machine that fuses 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 pressing the molten surfaces together for a predetermined period of time, the holder part is provided with the A timer mechanism having a first switch interlocked with the approach movement 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 _T2 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; and a second timer. A pipe fusion machine with a timer mechanism, characterized in that it has a second alarm member that is activated when the timer is finished and stops the operation by opening the first switch. 3. A pipe 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 fusion machine that fuses 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 pressing the molten surfaces together for a predetermined period of time, the holder part is provided with the A timer mechanism having a first switch linked to the approaching movement is provided, and the timer mechanism includes a first timer T1 for controlling the heating time that starts when the first switch is closed for the first time, and a first timer _T1 for controlling the heating time that starts when the first switch is closed for the first time. A second timer _T2 for crimping time control starts when the first switch is closed for the second time after the first switch is opened, and a second timer T2 starts at the same time as the first timer ends and stops when the first switch is opened for the first time. 1. A pipe fusion machine with a timer mechanism, comprising: a first alarm member; and a second alarm member that operates simultaneously with the end of a second timer and stops operating when the first switch is opened a second time.