JPS6330135B2 - - Google Patents

Abstract

PURPOSE:To enable to absorb shock reaction at the time of release of lock after fusion welding, by a method wherein a movable end of a toggle spring is hung on a pin of a locking gear interlocking with an operation lever and providing further a brake making a friction plate contact elastically with the locking gear. CONSTITUTION:An operation lever 9 bringing one of vises grasping both resin pipes close to the other vise is supported by hanging a movable end of a toggle spring 37 on a pin 36 of a locking gear 32 interlocking with the operation lever 9 which is placed on one side of a vertical line passing through the center of the operation lever 9 at the original position and displaced on the other side at the time of approach, and received control action of rotation by making a friction plate 34 contact elastically with the locking gear 32 further. When locking, therefore, is released by dividing a solenoid after a reisn pipe has been welded through pressure and fusion, peeling directly after fusion welding can be prevented as a false motion returning the operation lever 9 to the original position through shock reaction of the release of the locking is controlled and the shock reaction is absorbed by the spring 37 and a brake 35.

Description

Detailed Description of the Invention (Object and Structure) The present invention provides a first vise that releasably grips a resin pipe or a resin socket pipe on one side;
A second vise that releasably grips the resin pipe or resin saddle pipe on the other side is installed on the machine base, with one vise fixed in position, or both vises slidable, and the pipes on both sides are welded. The operating lever is provided with an operating lever that controls pressure contact between surfaces, a lock gear that rotates in conjunction with the operation of the operating lever, and lock teeth that control engagement and separation from the lock gear, and that the operating lever is provided facing each other. A resin pipe welder that moves the two vises relatively close to each other, rotates the lock gears in conjunction, and engages the lock teeth with the lock gears in relation to joining the welding surfaces of the pipes on both sides. a braking device that presses a friction plate against the lock gear by the elasticity of a spring; and a brake device that is located on one side of a vertical line that passes through the center of the lock gear when the operating lever is in its original position; This invention relates to a control device and a toggle control device for preventing the operation lever of a resin pipe welder, characterized in that the other end of a toggle spring, one end of which is attached near the vertical line, is hung on a pin of a lock gear that is displaced to the side. A simple device that uses a spring to prevent the lever from returning to its original position by accidental movement when the first vise and the second vise are relatively moved in the approaching direction by the operating lever. It is intended for the purpose of providing.

(Example) An embodiment of the present invention will be described with reference to the drawings.

In this embodiment, one resin pipe a is attached to one side of the machine base 1.
A first vice 6 with a fixed position is provided to releasably grip the pipe a, and a slidable second vise 8 which releasably grips the resin pipe b having the same diameter as the pipe a is provided on the other side.
is provided, and the rotation of the operating lever 9 causes the second vise 8
This is an example of a welder that welds the end surfaces of pipes a and b by bringing them close to the first vise 6.

The machine base 1 has a support 2 with a first vise 6 installed at its upper end.
A pair of round bar-shaped rails 4 in the front and rear are provided in opposition to a column 3 on which an operating lever 9 is pivoted, and a mounting portion 7 of a second vise 8 is slidably mounted between both columns 2 and 3. and the connecting rod 5 are passed and fixed.

The first vise 6 and the second vise 8 each include a fixed piece 10 on the lower side, a movable piece 11 that is pivotally supported at one end on the fixed piece and swings in the direction of the arrow x in FIG. 2, and a shaft on the lower end. 14 is pivotally supported on the fixed piece 10, and the arrow y in Fig. 2 is moved at the appropriate time.
The movable piece 11 is configured to have a gate-shaped fastening tool 12 that swings in the direction and presses the free end of the movable piece 11 with a set screw 13 at the upper end. The fixed piece 10 and the movable piece 11 are provided with semicircular arc-shaped opposite grooves for gripping pipes, and each groove has semicircular arc-shaped auxiliary pieces 10a, 11a for gripping a small diameter pipe. It is designed so that it can be installed by fitting it in.

A protruding shaft 15 that protrudes outward through the support column 3 is fixed to the mounting portion 7 of the second vise 8, and the shaft 15 has a slidable sleeve whose one end engages with a nut-shaped collar 16 at the outer end. Fit the tube 18 and pass it through the insertion hole 3a of the support column 3. The sleeve 18 has a rack 19 formed on its lower surface,
A blind hole 20 is provided at the front end. 21 is screwed into a screw 17 provided on the front outer periphery of the protruding shaft 15 to partially form a blind hole 20.
A pressure detection spring 22 is a cap-shaped adjustable spring receiving piece that is loosely inserted into the spring receiving piece 21 and the blind hole 20 of the sleeve 18, and has both ends pressed against the adjustable spring receiving piece 21 and the sleeve 18. will be established.

A shaft 23 that crosses the lower side of the rack 19 is provided on the support 3 as shown in FIG.
A pinion 24 that meshes with the shaft 3 is fixed, a small gear 25 is provided at one end, and the other end of the shaft 23 is connected to the support 3.
Pass it through the lock casing 31 attached to the. The operating lever 9 is rotatably supported by a shaft 26 which is supported below the small gear 25 and has a gear 27 fixed thereto, so that it can freely swing. intervene. On the mounting portion 7 of the second vise 8, locking switches 29 and 30 with respective push buttons 29a and 30a protruding along the path through which the sleeve 18 advances against the elasticity of the pressure detection spring 22 are installed as shown in FIG. The circuit of the switch 29 is closed when the auxiliary pieces 10a and 11a are fitted into the fixed piece 10 and the movable piece 11 of the second vise 8, and when the auxiliary pieces 10a and 11a are removed. switch 3
A changeover switch (not shown) is provided to close the zero circuit.

Inside the lock casing 31, a lock gear 32 is fitted and fixed onto the shaft 23, and behind the lock gear 32, a braking device 35 is mounted in the casing, which presses a friction plate 34 of rubber or other material against the gear 32 by the elastic action of a spring 33. Attach to 31. Also, the lock gear 32
When the operating lever 9 is in its original position shown by the solid line in Figure 1, it is at the left position of the vertical line L passing through the center of the shaft 23 as shown in Figure 3, and the operating lever 9 is rotated to the left in Figure 1. and two positions to the right of the vertical line L,
A pin 36 is provided which can be displaced in either direction, and the other end of a toggle spring 37, one end of which is fixed below the vertical line L, is hung on the pin 36. A solenoid 38 is attached to the upper side of the lock gear 32, and a plunger 39 is sucked in the pulling direction when the solenoid 38 is driven.
A lock tooth 40 is provided opposite the lock gear 32.

The lock tooth 40 is attached to the horizontal shaft 39a of the plunger 39 so as to be able to move slightly, and furthermore, the guide post 41 fixed to the tooth 40 is passed through the guide member 42 attached to the lock casing 31, and the guide post 41 is inserted between the guide post 41 and the guide member 42. Lock tooth 40 when solenoid 38 is not driven.
A pressing spring 43 is provided which engages the lock gear 32 to lock it. The solenoid 38 has the push buttons 29a and 30a of the locking switch 29 or 30 connected to the sleeve 1.
Insert it into the circuit that closes when pushed by 8.

In this embodiment, auxiliary pieces 10a and 11a are fitted into the first vise 6 and the second vise 8, resin pipes a and b with small diameters are gripped to the first vise 6 and the second vise 8, and the welded surfaces are The case where the ends are aligned by cutting and are in a protruding state will be explained by a mode in which the end faces are heated and welded.

When heating the end face of a resin pipe, solenoid 3
8 to lock gear 32 by lock teeth 40.
T with the lock removed and heating plates installed on both sides.
A shaped heater is suspended between the resin pipes a and b of the first vise 6 and the second vise 8, and the operating lever 9
oscillate from the position shown by the solid line in Figure 1 to the position shown by the chain line,
Shaft 23 via shaft 26, gear 27, and intermediate gear 28
Rotate. At that time, pinion 24 and rack 1
9, the sleeve tube 18 advances to the left in FIG. move to the left,
After the resin pipe a of the first vise 6 and the resin pipe b of the second vise 8 come into contact with both sides of the heating plate, the sleeve 18 compresses the pressure detection spring 22 and the pipes a, b
Increase the pressure applied to the heating plate. Then, the push button 29 of the locking switch 29 is pressed by the sleeve 18.
Press a to electrically detect the pressure in the second vise 7 due to the compression of the pressure detection spring 22.

Since the solenoid 38 has been driven up to that point and the lock gear 32 is not locked by the lock teeth 40, the shaft 2
3 and the lock gear 32 are rotated clockwise in FIG. 3, the pin 35 is moved to a position beyond the vertical line L to the right, and the toggle spring 37 causes the lock gear 32 and the shaft 23 to rotate clockwise. In addition, the friction of the braking device 35 causes the operation lever 9 to
so as not to return to its original position by itself, and at the same time as the locking switch 29 detects the pressure as described above, it closes the circuit of the solenoid 38 and drives the solenoid 38. For this reason, the lock tooth 40 projects downward together with the plunger 39 by the pressing spring 43, locking the lock gear 32, and disabling the movement of the second vise 8, operating lever 9, etc.

The heating time by pressing the resin pipes a and b against the heating plate is set by a timer (not shown).
When a certain heating time elapses, the circuit is opened by the timer, the solenoid 38 is driven, and the lock gear 32 is unlocked by pulling up the lock teeth 40 and the like by the pressure spring 43. For this reason, the pressure detection spring 22 tends to expand and return the mantle 18 until it hits the collar 16, but since the lock gear 32 is affected by the toggle spring 36 and the braking device described above, the operation lever 9 is without returning to the original position,
All that is required is to slightly loosen the pressure on the pipes a and b to the heater, thereby allowing the heater to be removed. Of course, if this heating is carried out with the pressure detection spring 22 being compressed, there is a risk that the heated end surface will melt a little and flow. Release lock and toggle heating hold spring 3
7. It is also possible to perform this by mechanically balancing the brake device 35 and the weight of the operating lever 9 located at the position indicated by the chain line, and to announce the end of the heating time with a signal sound or the like.

After heating as described above, immediately remove the heater,
The operating lever 9 is moved to the first position under the drive of the solenoid 38.
The second vise 7 is rotated to the position shown by the chain line in the figure, and the pinion 24 and the rack 19 engage with each other to further move the second vise 7 to the left, thereby pressing the end surfaces of the resin pipes a and b into contact with each other. This pressure contact is performed by the sleeve 18 under compression of the pressure detection spring 22 in the same way as before, so the sleeve 18 moves on the protruding shaft 15 in the same manner as described above, and this movement causes the locking switch 29 to open. Push button 29a is pressed to deactivate solenoid 39 to create a lock and maintain welding. Pin 36 is rotated to the position shown in FIG. 3 to further strengthen the toggle action of toggle spring 37.

The welding retention time is set by a timer (not shown), and as soon as the time elapses, the solenoid 37
is driven to unlock the lock gear 32.
By this release, the pressure detection spring 2 is
2 extends, but the sleeve 18 only hits the collar 16, and the lock gear 32 does not return the operating lever 9 and the second vise 7 to their original positions due to the toggle spring 38 and the braking device 35. Therefore, pipes a and b
The welded end faces of the welded end faces are simply loosened from the pressure welding, and the welded end faces are not pulled off as described above due to the force in the tensile direction that causes separation, so the welding is not weakened.

After this welding, a suitable air-cooling period is allowed, and the grip of the pipes a and b by the first and second vises 6 and 8 is released.

As mentioned above, the circuit is switched to the locking switch 30 when welding the large diameter resin pipes a and b, and the switch 29 does not work at all even if the sleeves come into contact with each other. After the switch 30 increases the amount of compression of the pressure detection spring 22 by the sleeve 18, the sleeve comes into contact with the push button 30a. That is, the pressure changes depending on the difference in diameter between pipes a and b.

In the above, when the pressure detection signal is output from the locking switch 29 or 30 immediately after the sleeve 18 compresses the pressure detection spring 22 in both heating and welding, the difference in position between heating and welding (the second In FIG. 1, there is a problem in that locking occurs regardless of the position of the operating lever (the position difference between the two), so it is better to perform motion detection that causes a slight time delay. That is, the operating lever 28 is in the position
Do not release your hand immediately after moving to , but only after confirming the lock.

There are two types of resin pipe welders: one that welds pipes of different diameters to the end of a short socket, and another that welds a saddle pipe to the side of one pipe. There is also a model in which welding is performed by moving the first vise 6 in the approach direction using each operating lever, but the present invention can be applied to any of these models.

(Effects) As clarified by the description of the embodiments described above, the present invention provides a lock gear 32 that rotates in conjunction with moving the vises 8 and 6 in the approaching direction by swinging the operating lever 9 from its original position. , when the operating lever 9 is in the original position, it is located on one side of a vertical line passing through the center of the lock gear 32, and the vices 8 and 6 are brought close to press the heater to the pipes a and b, or the pipe When pressing the end faces, a pin 36 that moves to the other side of the vertical line is provided, the other end of a toggle spring 37 whose one end is fixed on the vertical line is applied to the pin 36, and a friction plate is attached to the lock gear 32 by spring elasticity. Since a braking device 35 that presses the pin 34 is provided, even if the vises 6 and 8 are moved in the approaching direction by the operation lever 9 without locking the lock gear 32, the pin 36 will not move along the vertical line. The toggle spring 37 and the braking device 35 prevent the operation lever 9 from returning to its original position and rotating at the same time as it moves to the other side, and after the pin 36 has moved as described above, the lock gear 32 Even if the lever is locked by the lock teeth 40, it is possible to prevent the operation lever from accidentally returning to its original position until the lock is locked.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway side view, Fig. 2 is a front view of the same, Fig. 3 is a side view of the lock gear 32 etc. seen from the front, and Fig. 4 is a side view of the lock gear 32 etc. It is an exploded perspective view. 1... Machine base, 6... First vice, 7... Second vice,
8...Mounting part, 9...Operation lever, 15...Protruding shaft, 18
...Mantle, 19...Rack, 24...Pinion, 32...
Lock gear, 33... Spring, 34... Friction plate, 35...
Braking device, 36...pin, 37...toggle spring, 40
...Lock teeth.

Claims (1)

[Claims] 1. A first vise that releasably grips a resin pipe or resin socket pipe on one side, and a second vise that releasably grips a resin pipe or resin saddle pipe on the other side. The vise is fixed in position or both vises are slidable and installed on the machine base, and there is also an operating lever that controls the pressure welding of the welding surfaces of the pipes on both sides, and a lock gear that rotates in conjunction with the operation of the operating lever. and lock teeth whose engagement and separation from the lock gear are controlled are provided opposite each other, and the two vises are moved relatively close to each other by an operation lever, and the lock gears are rotated in conjunction with each other, and the pipes on both sides are moved. In a resin pipe welder that engages and locks a lock tooth with a lock gear in relation to joining the welding surfaces of the weld, a braking device that presses a friction plate against the lock gear by the elasticity of a spring, and a control lever in its original position. located on one side of the vertical line passing through the center of the lock gear,
Operation of a resin pipe welder characterized in that the other end of a toggle spring, one end of which is attached near the vertical line, is hung on a pin of a lock gear that is displaced to the other side of the vertical line as the lever is rotated. Lever delusion prevention device.