JPS6229218B2 - - Google Patents

Abstract

PURPOSE:To enable to perform a series of control, by locking an operation lever by making a locking cog operate through nondriving of a solenoid operating by detecting a pressure increase exercising over an ejecting shaft and vise by a method wherein the solenoid is pressed by a thimble. CONSTITUTION:End faces of small diameter resin pipes (a), (b) are heated for a predetermined period of time by a method wherein the pipes (a), (b) are grasped by vises 6, 7, a T-shaped heater is suspended between them, an operation lever 9 is rocked to a I position, a thimble 18 is moved leftward by gears 26-28 and a rack 19, an ejector shaft 15 and the vise 7 are moved leftward without compressing a pressure detecting spring 22, pressure-welding force is strengthened by the pressure detecting spring 22 when the pipe (b) is abutted against a heating plate, pressure of the vise 7 is detected through pressing of a locking switch 29 by the thimble 18, the solenoid is made nonoperatable and the vise 7 and the operation lever 9 are made incapable of making movement. The pressure-welding force is weakened by driving the solenoid after that, the heater is removed, and the operation lever 9 is rocked to a II position for fusion welding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes 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. In a resin pipe welder equipped with a swinging lever that controls the pressure welding of the surface to the heating plate and the pressure welding of the welded surface excluding the heating plate, a pinion that moves a slidable vise in conjunction with the operation of the operating lever. The rack is controlled by the rack driving by the engagement with the rack of the sleeve which fits into the protruding shaft protruding from the vise and pushes the vise via the protruded shaft by a pressure detection spring, and when pushed by the sleeve, the This device detects the increase in pressure exerted on the protruding shaft and vise of the machine and activates the lock teeth by deactivating the solenoid, thereby locking the operating lever, etc., and is particularly suitable for welding heated resin pipes. A lock is applied to keep the pressure at a constant value, and when the welding is completed after a predetermined period of time and the lock is released, a shock is applied to the resin pipe to prevent the weld from peeling off due to tension. It is characterized by a series of controls being performed by a rack transmission mechanism and a configuration in which a lock gear is provided on the shaft of a pinion that interlocks the rack through meshing.

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 which releasably grips the pipe a, and a slidable second vise 7 which releasably grips a resin pipe b having the same diameter as the pipe a is provided on the other side.
is provided, and the second vise 7 is moved to the first position by the operation lever 9.
This is an example of a welder that welds the end surfaces of pipes a and b in close proximity to the vise 6.

The machine base 1 has a support 2 with a first vise 6 installed at its upper end.
and a column 3 on which an operating lever 9 is pivoted are provided in opposition, and a pair of front and rear round bar-shaped rails 4 has a mounting portion 8 of a second vise 7 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 7 each include a fixed piece 10 on the lower side, a movable piece 11 whose one end is pivotally supported 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 opposing semicircular arc grooves 10a and 11a for gripping pipes, and each groove has a semicircular auxiliary piece for gripping a small diameter pipe. 10b, 11b
It is designed so that it can be installed by fitting it in.

A protruding shaft 15 that protrudes outward through the support 3 is fixed to the mounting portion 8 of the second vise 7, and the shaft 15 has a slide whose rear end engages with a nut-shaped collar 16 at the outer end. A movable sleeve 18 is fitted and passed through the insertion hole 3a of the strut 3. The sleeve 18 has a rack 19 formed on its lower surface and a blind hole 20 at its front end. 21 is the protruding shaft 15
It is a cap-shaped adjustable spring receiving piece that is screwed onto a screw 17 provided on the entire outer periphery of the sleeve and a part of the spring receiving piece is loosely inserted into a blind hole 20 of the sleeve 18. A pressure detection spring 22 is provided with both ends pressed together. The spring elasticity of the spring 22 can be adjusted using the spring receiving piece 2.
1 by rotating it on the screw 17.

An insertion hole 3b that crosses the lower side of the insertion hole 3a in the support 3
A shaft 23 having a fixed pinion 24 that meshes with the rack is supported by passing through the insertion hole 3b. The shaft 23 is provided with a small gear 25 at one end, and the other end of the shaft 23 is passed through a lock casing 31 attached to the support column 3. The operating lever 9 is fitted onto a shaft 26 which is supported below the small gear 25 and has a gear 27 fixed thereto, so that it can freely move.
An intermediate gear 28 is interposed between 7 and the small gear 25.

On the mounting portion 8 of the second vise 7, 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. provided in parallel to
When the auxiliary pieces 10b and 11b are fitted into the fixed piece 10 and the movable piece 11 of the second vise 7, the circuit of the switch 29 is closed, and when the auxiliary pieces 10b and 11b are removed, the circuit of the switch 30 is closed. A changeover switch (not shown) is provided that operates to close the switch.

Inside the lock casing 31, a lock gear 32 is fitted and fixed onto the shaft 23, and a friction brake device 34 is attached to the casing 31 behind the lock gear 32, which presses against the lock gear 32 by the action of a spring 33. In addition, the lock gear 32 operates in conjunction with the movement of the operating lever 9 to either the solid line position in FIG. A toggle spring 36 fixed below the vertical image L is hung on the pin 35 which is displaced to the left and right of the image L.
Above the lock gear 32 is a plunger 3 that is sucked in the pulling direction when the solenoid 37 is driven.
8 is provided with lock teeth 39 that mesh with the lock gear 32.

The lock tooth 39 is attached to the transverse shaft 40 of the plunger 38 so as to be able to move slightly, and furthermore, the guide column 41 fixed to the tooth 39 is passed through the guide member 42 attached to the lock casing 31, and the guide column 41 is inserted between the guide column 41 and the guide member 42. A pressure spring 43 is provided which engages the lock tooth 39 with the lock gear 32 to lock it when the solenoid 37 is not driven. The solenoid 37 has the push buttons 29a and 31a of the locking switch 29 or 30 connected to the sleeve 18.
Connect to a circuit that is pushed to close. The aforementioned lock is released by driving the solenoid 37.

In this embodiment, the auxiliary pieces 10b and 11b are fitted, and the small diameter resin pipes a and b are connected to the first vise 6.
and the second vise 7, and when the welded surfaces are aligned by cutting and are in a protruding state,
A mode of heating and welding the end face will be explained.

When heating the end face of a resin pipe, a T-shaped heater 51 with heating plates 52 on both sides is used as shown in FIG.
is suspended between the resin pipes of the first vise 6 and the second vise 7, and the operating lever 9 is swung from the position shown by the solid line in FIG. The shaft 23 is rotated via 28. At this time, the sleeve 18 moves to the left in FIG. 1 due to the rack mechanism formed by the meshing of the pinion 24 and the rack 19, and the pressure detection spring 22 is moved to the protruding shaft 15 via the adjustable spring receiving piece 21 with almost no compression.
and move the second vise 7 and the resin pipe b to the left. After the resin pipe a of the first vise 6 and the resin pipe b of the second vise 7 come into contact with both sides of the heating plate 52, the sleeve 18 compresses the pressure detection spring 22 as shown in FIG. The heating plate 52 is moved to strengthen the pressure against the heating plate 52. Finally, the push button 29a of the locking switch 29 is pushed by the sleeve 18 as shown in the figure, and the pressure in the second vise 7 caused by the compression of the pressure detection spring 22 is electrically detected.

Since the solenoid 37 had been driven until then and had not pulled up the plunger 38 and the lock teeth 39 against the elasticity of the pressing spring 43 to lock the lock gear 32, the shaft 23 was moved when the operating lever 9 was operated. Rotate clockwise in Fig. 3 and pin 35
The action of the toggle spring 36, which has moved to the position () beyond the vertical line L to the right, and the friction brake device 34
The operation lever 9 is prevented from returning to its original position by itself, but at the same time as the locking switch 29 detects the pressure through the sleeve 18 as described above, the circuit of the solenoid 37 is opened. Deactivate. Therefore, the lock tooth 39 projects together with the plunger 38 by the pressing spring 43 and engages with the lock gear 32, making the second vise 7, operating lever 9, etc. immovable.

The heating time by pressing the resin pipes a and b against the heating plate 52 is set by a timer (not shown), and when a certain heating time elapses, the circuit of the solenoid 37 is closed and driven by the timer, and the lock tooth 39 is activated. etc. are pulled up by the pressing spring 43 to release the lock. Therefore, the pressure detection spring 22
expands to return the cannula 18 until it hits the collar 16 as shown in FIG. 4, but the toggle spring 36 acts on the lock gear 32 to prevent free rotation in the counterclockwise direction as shown in FIG. , and since the friction brake device 34 is also acting, the operating lever 9 does not return to its original position, and the pressure detection spring 22 of the resin pipes a and b to the heater 51 is loosened to release the heater 51.
be free to remove. Of course, this heating can be done by pressing the resin pipes a and b against the heating plate 52, and if the pressing is carried out with the pressure detection spring 22 being compressed due to the aforementioned lock, there is a risk that the heated end surface may melt a little and flow. After a short period of time has elapsed, the solenoid 37 is driven by a timer to release the lock, and the heating maintenance toggle spring 3 is activated.
6. This is done by mechanically balancing the weight of the friction brake device 34 and the operating lever 9 located at the position of the chain line (), and the end of the heating time may be announced by a signal sound or the like.

After the heating described above, quickly remove the heater 51, rotate the operating lever 9 to the position indicated by the chain line () in FIG. to press the end surfaces of resin pipes a and b together. 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. Press push button 29a and solenoid 37
is deactivated to create a lock and maintain the weld.

The pin 35 is rotated to the position shown in FIG. 3 () to further strengthen the toggle action of the toggle spring 36.

The welding retention time is set by a timer (not shown), and as soon as the time elapses, the solenoid 37
drive to release the lock. As a result of this release, the pressure detection spring 22 expands in the same manner as described above, and the mantle 18 is simply brought into contact with the collar 16, and the operating lever 9
and without returning the second vise 7 to its original position,
For this reason, the welded end surfaces of the pipes a and b are only loosened from pressure, and the force in the pulling direction does not act to separate the end surfaces, so that 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 7 is released. As described above, the circuit is switched to the 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, pipe a,
The pressure changes depending on the diameter of 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 an inconvenience that locking occurs irrespective of the position ( ) and the position difference between ( ) of the operating lever, so it is better to perform late movement detection that causes a slight time delay. In other words, do not release the operating lever 28 immediately after moving it to position ()(), but release your hand after confirming that it is locked.

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

As clarified by the description of the above embodiments, the present invention provides a method in which the pinion 24, which is rotated by the operation of the operating lever 9, is slidably fitted into the protruding shaft 15 protruding from the vise, and the protruding rear end of the shaft 15 is A rack mechanism is constructed by meshing with a rack 19 provided on the sleeve 18, which is engaged with the sleeve 18, and one end is locked to the protruding shaft 15 to prevent the increase in pressure in the vise that occurs during heating or welding. The other end of the pressure detection spring 22 to be detected is hung on the sleeve, and the shaft 23 of the pinion 24 is also fitted with a lock gear 32, and becomes non-driven when the pressure set in the pressure detection spring 22 is detected. The solenoid 37 is configured to lock the operating lever 9 with the lock teeth 39 corresponding to the lock gear 32, thereby locking the vise, and is fitted so as to engage with the protruding rear end of the protruding shaft 15. The lock release mechanism of the sleeve 18 and the pressure detection spring 22 does not transmit the shock to the vise, but only to the operating lever, so it does not take up much space for installation, and the linked operation is ensured. This has an advantageous effect due to the easy-to-use rack mechanism.

[Brief explanation of the drawing]

The accompanying drawings show one 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 and 5
The figure is a cutaway side view illustrating the operation of the cannula 18.
The figure is a side view of the heater 51. 1 → Machine base, 6 → 1st vice, 7 → 2nd vice,
8→Mounting part, 9→Operation lever, 15→Protruding shaft, 16
→ collar, 18 → sleeve, 19 → rack, 21 → spring receiver, 22 → pressure detection spring, 23 → shaft, 24 → pinion, 32 → lock gear, 37 → solenoid,
38 → plunger, 39 → lock tooth.

Claims (1)

[Claims] 1. A first vise that releasably grips the resin pipe or resin socket pipe on one side, and a second vise that releasably grips the resin pipe or resin saddle pipe on the other side, with one vise fixed in position, Alternatively, both vises are slidable and installed on the machine base, and a swing lever is provided to control the pressure welding of the welding surfaces of the pipes on both sides to the heating plate and the pressure welding of the welding surfaces that are applied excluding the heating plate. In the resin pipe welder, one or both of the slidable vices are provided with a protruding shaft that protrudes rearward in the sliding direction, and the protruding shaft is provided with a freely slidable mantle that engages at the rear end of the protrusion. a tube, an adjustable spring holder screwed onto the protruding shaft on the front side of the casing, and a pressure detection spring in contact with the spring holder and the casing, forming a rack on the casing, and connecting the operating lever to the casing. A shaft that rotates in conjunction with the operation of is provided in a direction transverse to the protruding shaft, and a pinion and locking gear that mesh with the rack are attached to the locking gear, and a constant pressure set in a pressure detection spring is applied to the locking gear. An operation control device for a resin pipe welder, characterized in that a lock tooth is installed which engages the lock gear by a solenoid that is deactivated in relation to detection.