JPS623204Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a device for connecting pipes such as plastic pipes and sockets, and in particular, includes a pair of clamp mechanisms for holding the pipes, and a heater holder for heating the pipes between the two clamp mechanisms. This invention relates to a plastic pipe connection device in which a plastic pipe is placed.

Generally, in this type of connection device, heater attachments are attached to both sides of the heater holder, the ends of the pipes are fitted into the heater attachments, and the pipes are connected from the heater holder through the heater attachments. It transfers heat to the end and melts the end of the pipe. The heater attachments described above are used by replacing them depending on the diameter of the pipes, connection method, etc. For example, they may be replaced depending on the diameter of the pipe, or depending on the connection method, such as a butt joint method that welds the end surfaces of the pipes together, or a socket method that uses a socket or the like.

However, conventional heater attachments are removably attached to the heater holder using only bolts, so replacing the attachment is time-consuming. In other words, not only is it time-consuming to remove the bolt itself, but the heater attachment itself and the bolt are at a high temperature (for example, around 200℃) after use, so for example, while supporting the heater attachment, it is difficult to remove the bolt itself. The bolts had to be removed, and the removal work was extremely difficult.

This invention aims to make it possible to replace the heater attachment efficiently even when the heater attachment is at high temperature by making it easy to attach and detach the heater attachment to the heater holder. The gist of this is that a dowel part is formed on the side surface of the heater holder facing the clamp mechanism, and a plurality of protrusions for holding the heater attachment are formed on the same circumference at intervals in the circumferential direction. A plurality of notches corresponding to the protrusions are formed in the flange of the heater attachment that can fit into or come into contact with the pipes, and the flange is in-fitted to the heater holder so that the protrusions fit into the notches, By rotating the attachment, the flange can be held between the protrusion and the side surface of the heater holder so that it cannot fall off. The present invention will be explained below based on the drawings.

FIG. 1 is an overall side view of a connecting device to which the present invention is applied. In FIG. 1 (arrow F indicates the front), 1 is a truck, and is provided with a pair of front wheels 2 and a pair of rear wheels 3 on the lower side of its front and rear ends. The front wheel 2 is a turnable wheel with a brake, a so-called caster. On the upper surface of the truck 1, a front bracket 5 for supporting the guide rail is fixed to the front part, a rear bracket 6 for supporting the guide rail is fixed to the rear part, and a bracket 7 for supporting the heater holder is fixed to the middle part of the front and back width. There is. The bracket 7 is fixed, for example, to the right end portion of the truck 1, as shown in FIG.

Two guide rails 8 extending in the front-rear direction are fixed to the front and rear brackets 5 and 6, and the rails 8 have a circular cross-section. First and second clamps 10 and 11 for holding pipes are fitted to both the front and rear ends of the rail 8 so as to be movable in the length direction of the rail, but not rotatable around the rail, and the upper end of the bracket 7 is fitted to hold pipes. Heating heater holder 1
2 are provided. Reference numeral 13 denotes a bellows that covers the outer peripheral surface of the rail 8, and its both ends are connected to each clamp 10,
It is fixed to 11.

The first clamp 10 consists of a lower holder 14 and an upper holder 15, as shown in FIG. Part 1
4a is fitted to the rail 8 via the ball bush 16. The boss portion 14a has a butterfly bolt 14b that can lock the lower holder 14 to the rail 8.
are screwed together. An upwardly opening semicircular recess 17 is formed on the upper surface of the lower holder 14.
A downwardly opening semicircular recess 18 facing the recess 17 is formed on the lower surface of the recess 17, and the inner peripheral surfaces of both recesses 17 and 18 are provided with dovetail-shaped projections 17a and 18a along the circumferential direction. is formed. Yes 17
The dovetail grooves 19a (FIG. 1) of the half-split sleeve 19 are fitted into each of a and 18a along the circumferential direction, and this dovetail groove connection allows the sleeve 19 to fit into the recess 1.
It is attached to the inner peripheral surfaces of 7 and 18. Further, the upper half-shaped sleeve 19 is locked by a lock bolt 20 and a nut 21 so as not to move in the circumferential direction. One end of the upper holder 15,
For example, the right end in FIG. 2 is rotatably supported by the upper right end of the lower holder 14 via a horizontal pin 23, so that the upper holder 15 can be opened in the direction of arrow A.

A horizontal pin 2 is attached to the upper left end of the lower holder 14.
A tightening bolt 25 is rotatably supported around a pin 24 via a bolt 4, and a tightening nut 26 is screwed into the tip of the tightening bolt 25. On the other hand, the free end (left end) of the upper holder 15 is formed with a left-opening groove 27 for inserting a tightening bolt. That is, after rotating the tightening bolt 25 in the direction of arrow B to the state shown in FIG. 2, the nut 26 is tightened to tighten the pipes inserted into the sleeve 19,
Hold. The sleeve 19 is available in various inner diameters and can be replaced depending on the pipe size.

The second clamp 11 (FIG. 1) has the same structure as the first clamp 10, and the lower holder 34
and an upper holder 35. Regarding the parts corresponding to each part of the first clamp 10, both holders 34 and 35 and the sleeve 19' (FIG. 3)
The same numbers as in the case of the first clamp 10 are given except for. However, 34a is a boss portion, and 34b is a lock wing bolt. Further, the sleeve 19' has a longitudinal width d (FIG. 1) shorter than that of the sleeve 19 of the first clamp 10 so that a pipe with a short gripping width, such as an elbow pipe, can be attached thereto. For example, it is half the width.

The second clamp 11 is equipped with a pipe auxiliary holder 37, as shown in FIGS.
Even pipes with short gripping allowances, such as elbow pipes and T-shaped pipes, can be held securely.

To explain the auxiliary holder 37 in detail, the lower holder 34 of the second clamp 11 (FIG. 1)
A pair of left and right guide shafts 38 extending rearward are fixedly attached to the guide shafts 38, and a slider 40 is fitted onto the guide shafts 38 via a ball bushing 39. A connecting plate 43 is fixed to the rear end portions of both guide shafts 38 with bolts 42 . The slider 40 is fitted onto the guide shaft 38 so as to be movable in the lengthwise direction of the guide shaft but not rotatable around the guide shaft. A screw shaft 41 (FIG. 3) for moving the slider is arranged between both guide shafts 38 and parallel to the guide shaft 38. The front end of the screw shaft 41 is supported by the lower holder 34 so as to be immovable in the shaft length direction and rotatable around the shaft.
It is screwed into the female screw hole of 0. Screw shaft 41
The rear end portion is rotatably supported by a connecting plate 43 and extends rearward, to which a handle 44 is fixed. That is, by rotating the screw shaft 41 clockwise or counterclockwise via the handle 44, the slider 40 can be moved forward or backward. As shown in FIG. 3, the slider 40 is provided with a pair of left and right elbow tube support plates 45, 46, and a stopper plate 47 for supporting the support plates 45, 46. slider 40
A pair of upward brackets 48 are formed at both left and right ends of the screw shaft 41. A horizontal support shaft 49 perpendicular to the screw shaft 41 is fixed to both brackets 48, and the elbow tube support plates 45, 46 are mounted on this support shaft 49.
are each rotatably supported. The stopper plate 47 is fixed to the rear end edge of the bracket 48, and has an upwardly opening arcuate portion 47a on the upper surface of the center portion of the left and right width. The stopper plate 47 is attached to the elbow pipe support plates 45 and 46.
The elbow tube support plates 45 and 46 are held in an upright position as shown by solid lines in FIG. Reference numeral 50 designates lock bolts screwed onto both brackets 48, and by tightening the lock bolts 50, the elbow support plates 45, 46 are reliably held in the state shown by solid lines in FIG.

When fixing the elbow tube to the second clamp 11, at least one of the elbow tube support plates 45 and 46 is set in an upright position. For example, in the case of an elbow pipe that bends to the left in FIG. firmly hold the elbow tube. When fixing the T-shaped tube to the second clamp 11, both elbow tube support plates 45 and 46 are placed in an upright state. In addition, when attaching a long pipe to the second clamp 11, both plates 4
5 and 46 are brought forward.

As a mechanism for driving both clamps 10, 11 in the length direction of the guide rail, manual toggle mechanisms 52, 5 are provided for each clamp 10, 11 as shown in FIG.
3 are provided. The toggle mechanism 53 of the second clamp 11 consists of two upper and lower links 55 and 56 and a torque wrench 57, and the lower end of the lower link 56 is supported by the rear bracket 6 via a horizontal pin 58. At the same time, the front upper end is the upper link 5
5 via a pin 59 so as to be rotatable. Rear upper end boss portion 55a of upper link 55
is a horizontal pin 60 fixed to the lower holder 34.
It is rotatably supported. torque wrench 57
The lower end portion is fixed to the upper link boss portion 55a, and rotates integrally with the upper link 55. That is, by pulling up the torque wrench 57, the second clamp 11 is moved forward, and by pushing down the torque wrench 57, the second clamp 11 is moved backward. A downward bracket 61 is formed at the lower end of the lower holder 34, and a ratchet pawl 63 is rotatably supported on the bracket 61 via a horizontal pin 62. A ratchet 64 having a number of forwardly raised protrusions that can be freely engaged with the ratchet 63 is fixed thereto. That is, by tilting the ratchet claw 63 forward, the ratchet 64
By engaging with the second clamp 11, the second clamp 11 is locked in an appropriate position so as to be unable to move backward. 65 is a bolt for stopping the ratchet pawl, and this bolt 65
By tightening the ratchet pawl 63, the ratchet pawl 63 can be held in the unused state as shown in FIG. Note that a push rod and a spring are provided in place of the bolt 65, so that the push rod presses and holds the ratchet pawl 63 in an upright state due to the elastic force of the spring, and the holding state can be released by pushing the push rod. Good too.

The toggle mechanism 52 for the first clamp 10 is
It consists of lower links 66, 67, a torque wrench 68, etc., and the second clamp toggle mechanism 53
It has almost the same structure with the front and back reversed. 66
a is an upper link boss portion, and 69, 70, and 71 are pins. That is, by pulling up the torque wrench 68, the first clamp 10 is moved backward with a strong force, and by pushing it down, the first clamp 10 is moved forward.

The first clamp toggle mechanism 52 includes a first
A stroke change mechanism is provided that can change the retraction (reverse) start position of the clamp 10. That is, the front bracket 5 has a plurality of pin support holes X ₁ , X ₂ ,
X ₃ is formed, and each pin support hole X ₁ , X ₂ , X ₃
The upper end portions of the two are connected to each other by a guide groove _X0 .
_{Each support hole X 1 ,} It is designed to be selectively fixedly supported. Note that the pin 71 that supports the lower front end of the lower link 67 has a handle portion 71a and a small diameter male thread portion 7, as shown in FIG.
1b, and a nut 72 is screwed into the male threaded portion 71b. That is, by tightening the front bracket 5 between the right side step of the large diameter portion 71c of the pin 71 and the nut 72, the pin 71 can be fixedly supported in any of the support holes _X1 , _X2 , and _X3 . .

In FIG. 4, the heater holder 12 has an electric heater with a temperature controller inside. The right end of the heater holder 12 in FIG. 4 is rotatably supported by the bracket 7 via a horizontal pin 73, and by rotating it in the direction of arrow b from the use position shown in FIG. 11 (Fig. 1).

On both the front and rear sides of the heater holder 12 (Fig. 1), there are first and second holes 75 and 76 for heater attachments having the same inner diameter centered on the circle center line 0, and first and second holes respectively. Connector parts 75a and 76a are formed centered on the center line 0 and communicate with 75 and 76, respectively. A plurality of (for example, four) attachment holding protrusions 7 are provided at the peripheral edge of the second hole 76.
7 are formed on the side surface of the holder 12 at equal intervals in the circumferential direction on the same circumference as shown in FIG. Each protrusion 77 extends further toward the hole center than the periphery of the second hole 76 . There are also two upper and lower protrusions 7.
An attachment pressing screw 78 is screwed into the center 0 portion of 7. The periphery of the first hole 75 is also provided with a plurality of protrusions 77 having the same structure as the second hole 76 described above.

The first and second heater attachments 81 and 82 attached to both sides of the heater holder 12 are formed with flanges 81a and 82a that can be fitted with the spigot parts 75a and 76a. At the outer peripheral end of the flange 82a in FIG.
is formed. 1st heater attachment 8
A notch 84 similar to the second heater attachment 82 is also formed in the first flange 81a. Note that since both the pilot parts 75a and 76a have the same inner diameter, naturally the outer diameters of both the flanges 81a and 82a are also the same.

When attaching the second heater attachment 82, each notch 84 is
are aligned with each protrusion 77, the flange 82a is inserted into the second hole 76 and fitted into the pilot part 76a, and then the flange 82a is inserted in the direction of arrow G, for example.
2a and rotate the flange 82a by the protrusion 77.
to lock. Further, in order to improve the heat conduction efficiency from the heater holder 12 to the second heater attachment 82, the flange 82a is strongly pressed against the heater holder 12 by each screw 78.

When removing the second heater attachment 82, first loosen each screw 78, and then move the flange 82a in the opposite direction of arrow G (or arrow G) until the notch 84 moves from the solid line position to the imaginary line position in FIG. Then, the flange 82a is removed from the hole 76, etc.

The first attachment 81 is also attached and detached in the same manner as the second attachment 82.

The first attachment 81 (FIG. 1) is formed into a cylindrical shape and has a cylindrical portion 81c inside. That is, by using the outer circumferential surface of the cylindrical portion 81c and the outer circumferential surface of the outer circumferential wall, it is possible to heat and melt the inner circumferential surface of the pipe corresponding to those outer circumferential surfaces, and also by using the inner circumferential surface of the outer circumferential wall. Thus, the outer circumferential surface of a pipe P having a size as shown by the imaginary line in FIG. 1 can be heated and melted.

The second attachment 82 has a cylindrical shape, and its outer circumferential surface can be used to heat and melt the inner circumferential surface of the socket S as shown by the imaginary line in FIG. The inner circumferential surface can be used to heat and melt the outer circumferential surface of pipes of different sizes.

The first and second heater attachments 81, 8
Reference numeral 2 is an attachment used for connection using the socket joint method, but when connecting pipes using the butt joint method (end surface connection method), a disk-shaped attachment is used as shown in Figure 5. 87 is used. Of course, this attachment 87 is also provided with a flange 87a similar to the first and second heater attachments 81 and 82, and a notch 88 corresponding to the protrusion 77 (FIG. 4) is formed in the flange 87a. This attachment 8
The attachment/detachment method of 7 is the same as that of the first and second heater attachments 81 and 82.

Next, the operation of the entire connection device will be explained. For example, when connecting the pipe P to a socket S, the pipe P is fixed to the first clamp 10, the socket S is fixed to the second clamp 11, and the first
The pin 71 of the clamp toggle mechanism 52 is held in the frontmost support hole _X1 . Next, by pulling up the torque wrench 68 of the first toggle mechanism 52, the pipe P is moved backward together with the first clamp 10, and the outer peripheral surface of the pipe P is aligned with the inner peripheral surface of the outer peripheral wall of the first heater attachment 81. The torque wrench 5 of the second toggle mechanism 53
7, the socket S is moved forward together with the second clamp 11, and the socket S
The inner circumferential surface of the second heater attachment 82 is fitted to the outer circumferential surface of the second heater attachment 82 with a constant pressure. With the pipe P and socket S fitted into the first and second heater attachments 81 and 82, respectively, and pressed together, both clamps 10 and 11 are locked with wing nuts 14b and 34b, and heat from the heater holder 12 is removed. The outer circumferential surface of the pipe P and the inner circumferential surface of the socket S are heated, for example, for one minute, to melt them.

After heating and melting, loosen the wing nuts 14b and 34b,
The first clamp 10 is moved forward and the second clamp 11 is moved backward to remove the pipe P and the socket S from each attachment 81,82.

Thereafter, the heater holder 12 is retracted in the direction of arrow D in FIG. 4, and the pin 71 of the first clamp toggle mechanism 52 is supported in, for example, the third support hole _X3 . That is, the entire first clamp 10 and toggle mechanism 52 are moved rearward.

Next, the second clamp 11 is advanced appropriately using the torque wrench 57, and the ratchet pawl 63 is lowered to engage the ratchet 64, thereby locking the second clamp 11 so that it cannot be moved back. Then, the torque wrench 10 for the first clamp is pushed down, the pipe P is inserted into the socket S, and both P and S are connected.

Note that when fixing the socket S to the second clamp 11, the elbow pipe support plates 45 and 46 are placed in an upright position, and the rear end of the socket S is fixed to the plate 4.
You may press it with 5, 46. Of course, when fixing the elbow tube to the second clamp 11, both plates 45 and 46 are placed in an upright position as described above, and the bent portion of the rear end of the elbow tube at a right angle to the plane of the paper in FIG. It is pressed forward and held by plates 45 and 46.

When connecting the end faces of pipes using the butt joint method, replace the first and second heater attachments 81 and 82 shown in FIG. 1 with heater attachments 87 as shown in FIG. Tilt the support plates 45 and 46 forward. Furthermore, the first clamp toggle mechanism 52
The pin 71 is supported, for example, in the second support hole _X2 portion, and the first clamp 10 is brought close to the heater holder 12 side. The subsequent work is almost the same as the pipe and socket connection work described above.

FIG. 6 shows a modification of the heater attachment, and this heater attachment 91 is, for example, integrally equipped with a large-diameter cylindrical portion 91a at the front (arrow F side) and a small-diameter cylindrical portion 91b at the rear. , a flange 92 is provided at the intermediate portion, and the heater holder 12'
The flange 92 is inserted into a hole 94 formed in the hole 94, and the flange 92 is held in place by a plurality of protrusions 77'. Of course, a notch 94 is formed in the flange 92 to correspond to the projection 77'. That is, the pipe P and the socket S can be heated and melted by one heater attachment 91.

As explained above, in the present invention, a pipe is provided with a clamp mechanism for holding pipes such as a socket, for example, first and second clamps 10 and 11, and a heater holder 12 for heating the pipes is provided between both clamps 10 and 11. Heater attachment holding protrusions 77 are formed on the same circumference at intervals in the circumferential direction on the side surface of the heater holder facing the clamps 10 and 11, and fit into (or abut on) pipes. The flanges 81a of the heater attachments 81, 82 that can be
A plurality of notches 8 corresponding to the protrusions 77 are provided at 82a.
4, and fit the flanges 81a and 82a into the heater holder 12 so that the notch 84 and the protrusion 77 match, and the heater attachments 81 and 82.
By rotating the protrusion 77, the flange 81
Since a and 82a are locked and held, there are the following advantages.

(1) Compared to the conventional method of attaching the heater attachments using only bolts, attachment and detachment of the heater attachments 81 and 82, especially replacement work, becomes easier. That is, heater attachment 8 immediately after use.
1,82 is experiencing high temperatures (approximately 200℃),
Since it is not necessary to support the heater attachments 81, 82 for a long time when removing them, the replacement work can be performed extremely completely and efficiently.

(2) Since the notches 84 are formed in the flanges 81 and 82, manufacturing is easier than in the case where bolt insertion holes are formed.

Incidentally, as a mechanism for driving the first and second clamps 10 and 11 in the length direction of the guide rail, an electric drive device as shown in FIG. 7 may be employed.
That is, in FIG. 7, two screw shafts 101 and 102 are arranged between both guide rails 8 so as to rotate independently, and each screw shaft 10
1 and 102, the first and second clamps 10,
11. Each screw shaft 101, 102
are reverse switching powder clutches 103 and 1, respectively.
04, and is operatively connected to an electric motor 106 via an ON/OFF clutch 105. That is, by rotating each screw shaft 101, 102,
The first and second clamps 10, 11 can be moved forward or backward independently.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the plastic pipe connecting device according to the present invention, Fig. 2 is a cross-sectional view taken from Fig. 1, Fig. 3 is a view taken in the direction of the arrow in Fig. 1, and Fig. 4 is shown from Fig. The sectional view, FIGS. 5 and 6 are side views showing modified examples of the heater attachment, and FIG. 7 is a transmission mechanism diagram showing an example of the clamp mechanism driving device. 10, 11... Clamp (an example of a clamp mechanism), 12... Heater holder for heating pipes, 7
7...Protrusion for holding heater attachment, 81, 8
2, 87, 91... Heater attachment, 81
a, 82a, 87a, 92...flange, 84, 8
8,94...Notch.

Claims (1)

[Scope of utility model registration request] Equipped with a pair of clamp mechanisms for holding pipes such as pipes and sockets, a heater holder for heating the pipes is arranged between both clamp mechanisms, and a spigot part is formed on the side of the heater holder facing the clamp mechanism, A plurality of heater attachment holding protrusions are formed on the same circumference at intervals in the circumferential direction, and a plurality of protrusions corresponding to the above protrusions are formed on the flange of the heater attachment that can fit or abut on pipes. By forming a notch and fitting the flange into the heater holder so that the notch and the protrusion match, and rotating the attachment, the flange can be held between the protrusion and the side surface of the heater holder without falling off. A plastic pipe connecting device characterized by: