JPS6232831Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clamp mechanism for a plastic pipe connecting device that grips two pipes using separate clamp mechanisms and connects the pipes by fitting them together.

In general, a clamp mechanism is divided into upper and lower halves, and a pipe is gripped on the inner circumferential side of the clamp mechanism via a halves of a cylindrical sleeve. However, the inner circumferential surface of the conventional sleeve is simply cylindrical, and when gripping a flange type joint, it is necessary to grip the body of the flange type joint. That is, even if an attempt was made to grasp the flange-type joint by the flange portion, the axial width (thickness) of the flange portion was short, so the flange-type joint could not be gripped accurately and reliably using the inner circumferential surface of the sleeve. In addition, in order to directly grip the large-diameter collar, the diameter of the clamp mechanism must be significantly increased, resulting in an increase in the size of the device. On the other hand, when gripping the body of a flange type joint as described above, there are the following problems.

In other words, when connecting a flange type joint and a pipe by fitting the pipe from the side opposite to the flange part of the flange type joint, the diameter of the fitting connection range of the flange type joint is compressed by the clamp mechanism. This prevents the pipe from fitting smoothly and quickly into the flange type joint. Particularly when fitting and connecting a flange type joint and a pipe in a heated state, if the fitting process takes a long time, the flange type joint etc. will cool down during the process, and there is a risk that the connection cannot be made reliably.

The present invention includes a flange-type joint gripping member having an annular inner circumferential groove and an annular outer circumferential groove that are offset from each other in the axial direction. By configuring the flanges of the joint to engage and grip, the flange joint can be gripped securely and firmly without increasing the size of the clamp mechanism.
Moreover, by making the flange part grippable, it is possible to smoothly insert the pipe into the flange type joint. The present invention will be explained below with reference to the drawings.

In FIG. 1, a guide rail 1 having a certain length is supported at both ends by frames 2, and casters 3 are attached to each frame 2. As shown in FIG. 2, two guide rails 1 are provided in parallel with an interval between them. First and second clamp mechanisms 5 and 6 are provided on both the left and right sides of the guide rail 1 in FIG. 7 is fixed so that the position in the rail length direction can be changed. Frame 7
A heater block 8 is detachably provided on the heater block 8, and on both sides of the heater block 8 there are first and second cylindrical tubes with a bottom.
Heater attachments 9 and 10 are secured to each other by bolts 11 at the same center.

To explain the first clamp mechanism 5 in detail, the first clamp mechanism 5 consists of an upper holder 13 and a lower holder 14, as shown in FIG.
A pair of bosses 15 are integrally provided at the left and right lower end portions of the lower holder 14 in FIG. 3, and these bosses 15 are fitted to the rail 1 (FIG. 1) via the bushes. One end of the upper holder 13, for example the left end side in FIG.
The upper holder 13 can be opened around the pin 16. A bolt 19 is rotatably supported at the upper right end of the lower holder 14 in FIG. 3 via a horizontal pin 17, and a nut 20 is screwed into the tip of the bolt 19. On the other hand, a right-opening bolt insertion groove 21 (see FIG. 2) is formed at the free end (right end in FIG. 3) of the upper holder 13.
That is, by turning the bolt 19 counterclockwise to an upwardly protruding position as shown in Fig. 3 and then tightening the nut 20, it is possible to tighten the pipes inserted into the sleeve 23, or to move the rail in the longitudinal direction. The goal is to guide you. The sleeve 23 is divided into upper and lower halves, and the outer circumferential groove of the lower sleeve portion 23b meshes with the upper-opening semicircular circumferential edge 14a of the lower holder 14 so as not to be able to move in the axial direction, and the upper sleeve portion 23a has its outer circumferential groove The groove is a downwardly opening semicircular peripheral edge 13a of the upper holder 13.
It is meshed and fitted so that it cannot move in the axial direction. Further, an upper holder 13 is provided at the upper end of the upper sleeve portion 23a.
A bolt 24 that protrudes upward through the upper hole is fixed, and a nut 2 is attached to the upper end of this bolt 24.
6 by tightening the upper sleeve part 2
3a is held so that it cannot fall off.

Two auxiliary rails 28 are removably fixed to the lower end of the lower holder 14 so as to extend parallel to the rails 1 on the side opposite to the pedestal 7, as shown in FIG. For example, a stepped bolt portion 28 formed at the end of the auxiliary rail 28 on the arrow A side (frame 7 side)
a is inserted into the bolt insertion hole 30 of the lower holder 14 and tightened with a chrysanthemum nut 31. The auxiliary rail 28 is provided with an auxiliary clamp mechanism 33 having a similar structure to the first clamp mechanism 5 and whose position in the rail length direction can be adjusted. That is, the auxiliary clamp mechanism 33 consists of an upper holder 34, a lower holder 35, etc., and a boss 36, and the boss 36 fits into the auxiliary rail 28. However, a lock bolt 37 that is perpendicular to the auxiliary rail 28 is screwed into the boss 36, and by tightening the lock bolt 37, the auxiliary clamp mechanism 33 can be fixed at any position on the auxiliary rail 28.

The auxiliary clamp mechanism 33 is equipped with a flange-type joint gripping member 38, which is the essential part of the present invention. The gripping member 38 is divided into upper and lower halves, and has an annular inner circumferential groove 69 and an annular outer circumferential groove 70 . Both grooves 69 and 70 are formed at positions shifted from each other in the axial direction. For example, the inner circumferential groove 69 is deviated from the outer circumferential groove 70 in the direction of arrow A. The upper and lower pieces 38a and 38b of the gripping member 38 have their outer circumferential grooves 70 on the upper side and the lower holder 34, respectively.
It meshes with 35. Gripping member upper piece 38a
An upwardly projecting bolt 73 is integrally formed at the upper end of the holder 34, and this bolt 73 projects upward through the upper hole of the upper holder 34, into which a nut 74 is screwed. That is, by tightening the nut 74, the upper piece 38a is held so that it cannot fall off.

The second clamp mechanism 6 has a similar structure to the first clamp mechanism 5, and parts corresponding to the first clamp mechanism 5 are given the same numbers as the first clamp mechanism 5. 39 is a sleeve for the second clamp mechanism.

As shown in FIG.
They are integrally connected by a bottom plate 42, a block regulating pin 43 shown in FIG. 4, and the like. A pair of bosses 41 are provided on the left and right sides of FIG. 4, and each is fitted into the guide rail 1 via a bush. The boss 41 is movable in the rail length direction with respect to the rail 1, but the lock bolt 45 is perpendicular to the rail 1.
is screwed into the rail, and by tightening a lock bolt 45, the position of the rail in the longitudinal direction can be fixed. That is, the pedestal 7 is fixed to the rail 1 so that its position in the rail length direction can be changed. Further, both plates 40 are formed with a generally semicircular recess 40a (FIG. 4) that opens upward.

The heater block 8 is inserted between the plates 40 from above, and the arc-shaped notches 8a at the lower left and right ends of FIG. 4 are engaged with the posts 41. For example, a handle 48 (FIG. 1) is fixed to the upper end of the heater block 8, and the heater block 8 can be taken out upward from the pedestal 7 by holding this handle 48. Heater block 8 is connected to a suitable power source,
For example, 260 with heater attachments 9 and 10.
It can be heated up to about ℃.

Next, a hydraulic cylinder mechanism for independently moving the first clamp mechanism 5 (and the auxiliary clamp mechanism 33) and the second clamp mechanism 6 in the rail length direction will be described. As shown in FIG. 2, in the plastic pipe connecting device, a first hydraulic cylinder 51 is arranged on the arrow A side of the pedestal 7 (the right side in FIG. 2), and a second hydraulic cylinder 51 is arranged on the arrow B side of the pedestal 7 (the left side in FIG. 2). A hydraulic cylinder 52 is arranged. As shown in FIG. 1, the first hydraulic cylinder 51 is supported at the lower end portion of the pedestal 7 on the arrow A side (right side in FIG. 2) via a pair of first pin receivers 53 and a horizontal support pin 54. The rod 55 extends along the lower side of the rail 1 in the direction of arrow B through a rod passage hole 56 at the lower end of the pedestal 7, and is attached to a horizontal pin at the lower end two crotches 57 of the lower holder of the first clamp mechanism 5. 58. Reference numerals 59 and 60 denote first and second oil supply parts, which are connected to appropriate hydraulic pressure supply mechanisms and switching valves, and supply oil to the first oil supply part 59 to move the rod 55 in the direction of arrow A. Pull the first clamp mechanism 5 and the auxiliary clamp mechanism 33 in the direction of arrow A.
move in the direction. Furthermore, by supplying oil to the second oil supply section 60, the rod 55 is pushed out in the direction of arrow B, and the first clamp mechanism 5 and the auxiliary clamp mechanism 33 are moved in the direction of arrow B.

The second hydraulic cylinder 52 is also the first hydraulic cylinder 51
It has a similar structure as shown in FIG. 2, and is supported via a horizontal pin 62 by a second pin receiving part 61 fixed to the side of arrow B of the pedestal 7 (left side of FIG. 2). The rod 63 extends in the direction of arrow A, and is connected to the lower end bifurcated portion 64 of the second clamp mechanism 6 via a horizontal pin 65. 66, 67
are first and second oil supply parts, which are connected to the hydraulic pressure supply mechanism and the switching valve. By supplying oil to the first oil supply part 66, the rod 63 is pulled in the direction of arrow B, and the second oil supply part 66 is pulled in the direction of arrow B. Move the clamp mechanism 6 to the arrow B side. Further, by supplying oil to the second oil supply section 67, the rod 63 is pushed out in the direction of arrow A, and the second clamp mechanism 6 is moved in the direction of arrow A.

Next, a method for connecting pipes using the illustrated connecting device will be explained. First, the second clamp mechanism 6 (first
For example, in the case shown in Fig. 1, a joint P' to which a pipe P is fixed is grasped. On the other hand, the flange type joint S 1 is inserted into the first clamp mechanism 5 and the auxiliary clamp mechanism 33 with _the flange portion S' ₁ thereof facing in the direction of arrow B. The flange-type joint S ₁ is gripped at its collar S' ₁ by the inner groove 69 of the gripping member 38 with strong pressure. However, the first clamping mechanism 5 applies almost no pressure to the body of the flange-type joint S ₁ and merely guides the flange-type joint S ₁ for centering. Note that the width L ₁ in FIG. 1 is the fitting connection range, that is, the width in which the pipe P can fit, and the first clamp mechanism 5 is located within the width L ₁ ;
The gripping member 38 is located outside the width _L1 in the direction of arrow B.

FIG. 5 is a view of the gripping member 38 in the direction of the arrow in FIG.

Next, by contracting the rod 63 of the second hydraulic cylinder 52 (FIG. 2), the pipe P is moved in the direction of arrow B together with the second clamp mechanism 6, and is brought into constant pressure contact with the inner peripheral surface of the second heater attachment 10. Fit with force. Also, the rod 55 of the first hydraulic cylinder 51
By contracting , the flange type joint S ₁ is moved in the direction of arrow A together with the auxiliary clamp mechanism 33 and the first clamp mechanism 5, and a constant pressure is applied to the flange type joint S ₁ on the outer peripheral surface of the first heater attachment 9. mating. Note that when the pipe P and the joint P' are already fixed to equipment at a piping site, for example, and the rod 63 of the second hydraulic cylinder 52 is retracted, the second clamp mechanism 6, the pipe P and the joint P' Meanwhile, the frame 2, the pedestal 7, etc. are relatively moved in the direction of arrow A by the casters 3,
Fit the pipe P into the second heater attachment 10. In addition, the first clamp mechanism 5 is a flange type joint.
Since no pressure is applied to _S1 in the direction of diameter reduction, the first heater attachment 9 fits smoothly into the flange type joint _S1 . With the flange type joint S1 and the pipe P fitted to both attachments 9 and 10, respectively, the inner peripheral surface of _the flange type joint _S1 and the outer peripheral surface of the pipe P are heated by the heat from the heater block 8.

After heating, the rods 55 of both cylinders 51, 52,
63 and both heater attachments 9,
Pull out the flange type joint S ₁ and the pipe P from 10, and apply adhesive to the inner peripheral surface of the flange type joint S ₁ and the outer peripheral surface of the pipe P. Then, the rods 55, 63 of both cylinders 51, 52 are contracted again, and the flange type joint _S1 and pipe P are fitted to both heater attachments 9, 10, and heated. Furthermore, since both heater attachments 9 and 10 are coated with Teflon, the flange type joint S ₁
or the pipe P will not adhere to the heater attachments 9 and 10.

After heating, the rods 5 of both cylinders 51 and 52 are
5, 63 and pull out the flange type joint _S1 and pipe P from both heater attachments 9,10.

After that, the heater block 8 is taken out upward from the pedestal 7 together with the heater attachments 9 and 10, and the rods 55 and 6 of both cylinders 51 and 52 are reattached.
3, and fit the pipe P into the flange type joint S ₁ with a constant pressure to connect both S ₁ and P. In this case as well, the first clamp mechanism 5 is a flange type joint.
By applying almost no pressure to S ₁ in the diameter reduction direction, the pipe P fits smoothly into the flange type joint S ₁ .

As explained above, the present invention provides an annular inner circumferential groove 69 and a shaft extending from the inner circumferential groove 69 in a plastic pipe connecting device that grips two pipes with separate clamp mechanisms and connects the pipes by fitting together. The flange-type joint gripping member 38 having an annular outer circumferential groove 70 that deviates in the direction is engaged and held at the annular outer circumferential groove 70 portion by a clamp mechanism (for example, the auxiliary clamp mechanism 33), and the annular inner circumferential groove 69 engages and holds the flange-type joint gripping member 38. Since the flange portion S' ₁ of the joint S ₁ is configured to be engaged and gripped, there are the following advantages.

(1) Since the flange portion S' ₁ of the flange type joint S ₁ is gripped, for example, when connecting the pipe P by fitting from the end of the flange type joint on the opposite side from the flange portion S' ₁ , The fitting connection range _L1 portion of the flange type joint _S1 is not compressed in diameter, and therefore the pipe P can be fitted into the flange type joint _S1 smoothly and quickly. In particular, when both S ₁ and P are heated and connected, the connection can be quickly made before the temperature of both decreases, so that both S ₁ and P can be firmly and reliably connected.

(2) The gripping member 38 engages and grasps the flange portion S' ₁ of the flange type joint S ₁ through its inner circumferential groove 69, and is engaged and held by the clamp mechanism 33 at the outer circumferential groove 70, so that the flange The type fitting S ₁ is reliably held in the correct condition. That is, during the movement of the clamp mechanism 33, for example, during the fitting and connection work or the pulling out work from the heater attachment 9, the joint _S1
will not shift in the axial direction with respect to the gripping member 38, etc., and will not tilt.

(3) Since the positions of both grooves 69 and 70 are shifted in the axial direction, there is no need to increase the size of the clamp mechanism 33 itself when gripping the collar S' ₁ with a large diameter, and the gripping It is only necessary to increase the diameter of the inner circumferential groove 69 of the member 38. That is, it is possible to avoid increasing the size of the entire plastic pipe connecting device.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a plastic pipe connecting device to which the present invention is applied, Fig. 2 is a plan view of Fig. 1,
Figures 3 and 4 are - and - of Figure 1, respectively.
The sectional view, FIG. 5, is a view of the gripping member in the direction of the arrow in FIG. 5, 6, 33... Clamp mechanism, 38... Flange type joint gripping member, 69... Annular inner circumferential groove, 7
0...Annular outer circumferential groove.

Claims (1)

[Scope of utility model registration request] In a plastic pipe connecting device that grips two pipes with separate clamp mechanisms and connects the pipes by fitting, a flange type having an annular inner circumferential groove and an annular outer circumferential groove axially offset from the inner circumferential groove. A plastic pipe connection characterized in that the joint gripping member is configured to be engaged and held by a clamp mechanism at its annular outer circumferential groove, and to engage and hold the collar of the flange type joint by the annular inner circumferential groove. Clamping mechanism of the device.