JP7259155B2 - Seal tape winding device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sealing tape winding device for winding a sealing tape around a threaded portion of a hollow workpiece having a threaded portion formed at one end thereof.

The present applicant has developed an automatic sealing tape winding machine for winding sealing tape around a hollow workpiece, for example, a male threaded portion of a taper threaded joint for pipes, thereby saving labor in manual sealing tape winding work and manual winding. We have tried to reduce the variation in quality.

In addition, the automatic sealing tape winding machine developed by the applicant of the present invention, as shown in FIG. It is positioned and pressed by pressure rollers 11 and 11 so that the seal tape T is interposed between the drive roller 10 and the drive roller 10 . When the screw portion Wa is pressed against the drive roller 10 , the screw portion Wa is driven to rotate as the drive roller 10 rotates. As a result, the seal tape T delivered between the drive roller 10 and the screw portion Wa is wound around the screw portion Wa of the workpiece W. As shown in FIG.

However, in this automatic sealing tape winding machine, although the sealing tape winding itself is automatically performed in the work space between the drive roller and the pressure roller, the work is placed in the work space as shown in FIG. It was necessary for the worker to grasp the work and carry it to the working space S. Since the worker is holding the work, there are problems such as dropping the work during work. In view of this point, the seal tape winding machine proposed by the applicant has a work loader that attaches the work to the work holding portion of the attachment and moves the work to the work space between the drive roller and the pressure roller for each attachment. This eliminates the work of manually carrying it to the working space.

Japanese Patent Publication No. 55-18233

However, with this seal tape winding machine, it is necessary to manually attach the workpieces one by one to the workpiece holding portion of the attachment. There was a problem that it was not possible to

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to provide a sealing tape winding apparatus capable of continuously supplying a workpiece to a work space for winding the sealing tape without manual intervention. That's what it is.

A tape winding apparatus according to the present invention, which has been made to solve the above-mentioned problems, places the threaded portion of a hollow cylindrical work having a threaded portion on at least one end thereof in a work space between a drive roller and a pressure roller, and places the threaded portion on the drive roller. A seal tape winding device that winds the seal tape around the threaded portion by pressing the seal tape so that the seal tape is interposed between the
a work holder for vertically stacking and storing the work so that the axis of the work is substantially parallel to the axis of the drive roller;
a workpiece clamping mechanism having a pair of claws that move in a direction substantially perpendicular to the axis of the driving roller;
a work pushing mechanism having a work insertion pin at its tip for moving the work clamped by the work clamping mechanism to the working space;
The work holder has a discharge port for discharging the work at the lower end and an insertion port opposite to the discharge port for allowing passage of the cutting claw portion of the work clamping mechanism,
The work clamping mechanism includes a cutting claw portion and a holding claw portion that moves from a position facing the cutting claw portion toward the discharge port to hold the workpiece, and has an axis of the clamped workpiece and an axis of the workpiece insertion pin. and move it to a position where
The work push-out mechanism includes a movement mechanism that inserts the work insertion pin into the work and moves the work together with the work in a direction substantially parallel to the axis of the drive roller to the work space.

This tape winding device sequentially moves the works stacked on the work holder to the work space without manual intervention.

In this case, the work holder can be provided with an adjusting plate abutting on the end face in the longitudinal direction of the work and adjusting means for adjusting the position of the adjusting plate.

Further, the discharge port of the work holder is provided with a regulating plate for regulating discharge of the work, and the regulating plate can open and close the discharge port in conjunction with the operation of the work clamping mechanism.

Furthermore, the restricting plate can be operated by detecting means for detecting that the holding claw portion has moved to the vicinity of the discharge port.

According to the present invention, it is possible to continuously wind the seal tape around the work without the need for an operator to stay in front of the seal tape winding device. In addition, by providing the work holder with an adjusting plate and adjusting means, it is possible to deal with a plurality of work sizes. Furthermore, by providing a regulating plate at the discharge port of the work holder, it is possible to prevent the discharge port from being clogged with works that fall due to their own weight.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which looked at the outline of the seal tape winding apparatus which concerns on embodiment of this invention from the front. FIG. 11 is a front view for explaining the operation of the workpiece clamping mechanism of the seal tape winding device, in which (a) shows a state in which the tip of the holding claw portion has entered the workpiece holder 2 from the discharge port, and (b) shows the state of (a). (c) shows a state in which the cutting claw portion enters from the insertion opening and the work is sandwiched between the holding claw portion and the holding claw portion as the cutting claw portion advances further from the state (b). retreats and the axis of the work and the axis of the work insertion pin are substantially aligned. FIG. 3 is a partially cutaway plan view showing a work clamping mechanism and a work push-out mechanism of the seal tape winding device; It is explanatory drawing of the work holder of the same seal tape winding apparatus, (a) is sectional drawing cut|disconnected in an adjusting means part, (b) is the perspective view notched in the position of a discharge port and an insertion port. It is a perspective view for demonstrating winding of a sealing tape. FIG. 2 is an explanatory diagram of a conventional sealing tape winding device winding a tape around a work.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications, or its uses.

<Embodiment 1>
1 to 3 show Embodiment 1 of the present invention.

This tape winding device 1 positions a threaded portion Wa of a hollow cylindrical work W having a threaded portion Wa formed on at least one end thereof in a work space S between a driving roller 10 and a pressing roller 11 and between the driving roller 10 and the pressure roller 11 . The seal tape T is pressed by the pressure roller 11 so that the seal tape T is interposed therebetween, and is driven to rotate as the drive roller 10 rotates. work holder 2 vertically stacked so as to be substantially parallel to the axis SC1 of the driving roller 10, and a pair of claws moving in a direction substantially orthogonal to the axis SC1 of the driving roller 10. A workpiece clamping mechanism 3 and a workpiece pushing mechanism 4 having a workpiece inserting pin 40 at its tip for moving the workpiece W clamped by the workpiece clamping mechanism 3 to a working space S are provided. The work holder 2 has a discharge port 20 for discharging the work at its lower end and an insertion port 21 opposite to the discharge port 20 for allowing the passage of the cutting claw portion 31 of the work clamping mechanism 3 . The workpiece clamping mechanism 3 includes a cutting claw 31 and a holding claw 32 that moves from a position facing the cutting claw 31 toward the discharge port 20 to hold the workpiece. It has a moving mechanism for moving to a position where the axis SC2 of the work insertion pin 40 substantially coincides. The work push-out mechanism 4 includes a movement mechanism 41 that inserts the work insertion pin 40 into the work W and moves the work W together with the drive roller 10 in a direction substantially parallel to the axis SC1 of the drive roller 10 to the work space S.

The hollow cylindrical work W is, for example, a tapered male screw for pipes of R1/8 to R3/4. Normally, both ends have threaded portions, but if one is a tapered threaded portion Wa, the other may be a parallel threaded portion or a state in which a nut is attached to the parallel threaded portion. Also, as long as one end is formed with a male threaded portion around which the sealing tape T is wound, the other end may be an adapter having a female threaded portion.

The material of the drive roller 10 is not particularly limited. It is composed of an elastic member (for example, an annular urethane rubber) fitted to the peripheral surface of the.

In the present embodiment, two pressure rollers 11 are arranged vertically when viewed from the front as shown in the drawing. The pressing roller 11 is moved by the slide unit 14 in a direction substantially orthogonal to the axis SC1 of the drive roller 10 . The slide unit 14 is not particularly limited as long as it exerts a pressing force sufficient to press the screw portion Wa of the work W against the driving roller by the pressing roller 10. In this embodiment, an air cylinder with a guide is used. ing.

It is preferable to prepare a plurality of pressure rollers 11 having different outer diameters and different distances between the pressure rollers according to the size of the work W around which the seal tape T is to be wound. For example, three types of pressure roller structures 13 (pressure roller 11 and pressure roller mounting body 12) for R1/8, R1/4 and R3/8, and R1/2 and R3/4 can be used. According to experiments conducted by the present inventors, by forming a threaded portion matching the threaded portion Wa of the corresponding work W on the peripheral surface of the pressure roller 11 and pressing the work W against the driving roller 10, the pressure roller 11 is It has been found that it is preferable to prepare five types of pressure roller structures 13 according to the sizes R1/8 to R3/4 of the workpieces W, because the movement in the axial direction due to the rotation can be suppressed.

A triangular area connected by the vicinity of the peripheral surfaces of the drive roller 10 and the two pressure rollers 11, 11 serves as a working space S around which the sealing tape T is wound.

The tape winding device 1 of this embodiment includes a work holder 2 and a work clamping mechanism 3 that continuously supply the work W to the work pushing mechanism 4 that positions the screw portion Wa of the work W in the work space S. I have.

[Work holder]
The work holder 2 has a space in which a joint of R3/4, which is the maximum size of the work W, can be accommodated therein, and is configured so that the work can be vertically stacked. Specifically, it is composed of a front plate 22 having a discharge port 20 at its lower end, side plates 23, 23 connected to the front plate 22, and a rear plate 24 connected to both side plates 23, 23. At a position facing the exit 20, an insertion opening 21 is opened to allow passage of a clipping claw portion 31 of the workpiece clamping mechanism 3, which will be described later.

Both side plates 23, 23 are provided with adjusting means 26 for adjusting the position of the adjusting plate 25 that abuts on the end face in the longitudinal direction of the work. The adjusting plate 25 has substantially the same length as the side plate 23 (a length such that the lower end portion does not reach the discharge port 20 and the insertion port 21), and two adjusting plates 25 are arranged so as to face each other along the side plates 23, 23. The distance between the side plates 23, 23 in the inner space of the work holder 2 is regulated.

The adjusting means 26 for adjusting the position of the adjusting plate 25 is not particularly limited in its configuration, nor is its arrangement position particularly limited. Arrange. The adjusting means 26 of the present embodiment includes a moving plate 26A attached to the adjusting plate 25 by fixing means such as countersunk screws, and is rotatable with respect to the moving plate 26A. A bolt 26C with a specially processed tip is used, which has a male threaded portion that is screwed into a female threaded portion (formed by welding a nut 26B in this embodiment) formed on the side plate 23 .

By screwing in the bolt 26C of the adjusting means 26, the distance between the side plates 23, 23 in the inner space of the work holder 2 is shortened, corresponding to the size of R1/8, and by turning it in the opposite direction, the size is also made to be R3/4. handle. Further, as shown in the figure, it is preferable to dispose adjusting means 26 having the same configuration on the adjusting plate 25 and the rear plate 24 of the work holder 2 not only in the longitudinal direction of the work but also in the radial direction. In this radial adjustment, the position of the workpiece W is restricted by the adjustment plate 25 and the inner surface of the front plate 22 .

The work W is regulated in the radial direction by arranging a shaft penetrating the rear plate 24 on the adjusting plate 25 and fitting a coil spring on the shaft so as to always urge the adjusting plate 25 toward the front plate 22 side. can also be configured to

The work W in the work holder 2 is placed on the cutting claw portion 31 of the work clamping mechanism 3 while the work W is clamped by the work clamping mechanism 3 and moved. From this state, when the cutting claw 31 moves toward the insertion opening 21, the whole piled up work falls by the height of one work W due to its own weight. At that time, it is assumed that the work W positioned at the bottom rolls toward the discharge port 20 and loses its stacked state, and the work is clogged in front of the discharge port. If the work W unintentionally rolls out toward the discharge port 20 in this manner, the work W cannot be held by the work holding mechanism 3 . Therefore, in the present embodiment, a regulation plate for regulating the discharge of the work W is arranged at the discharge port 20 of the work holder 2 . This restricting plate opens and closes the discharge port 20 in conjunction with the operation of the workpiece clamping mechanism 3 .

The regulating plate (not shown) is an elastic plate-like member arranged so as to cover a part of the discharge port 20, and does not bend even if it hits with an impact such as dropping due to its own weight, and the cutting claw 31 is prevented from bending. The function can be achieved by adjusting the thickness to such an extent that it bends depending on the pressure and allows the work W to pass through.

Further, the regulating plate may be of a mechanical shutter type and configured to open the discharge port 20 upon detecting that the holding claw portion 32 that holds the workpiece W approaches the discharge port 20 from the discharge port 20 side. can. The holding claw portion 32 can be detected by electrical means such as a proximity sensor, and the shutter-type regulating plate can be electrically pulled upward.

In addition, the detection means is provided with a mechanical projection near the discharge port 20 where the lower surface of the holding claw 32 or the cutting claw 31 slides, and the holding claw 32 approaches the discharge portion 20 and the projection may be configured such that a shutter-type regulating plate that covers the discharge port 20 is mechanically pulled upward by pushing down the .

[Work clamping mechanism]
The workpiece clamping mechanism 3 includes a holding claw portion 32 that abuts on the longitudinal side surface of the workpiece W at the bottom of the stacked workpieces W from the discharge port 20 side of the workpiece holder 2, and the workpiece W from the insertion port 21 side. It is composed of a cutting claw portion 31 that abuts on the longitudinal side surface and moving mechanisms 34 and 33 that move the respective claw portions in a direction orthogonal to the axis SC1 of the driving roller 10 .

The movement mechanisms 33 and 34 are not particularly limited as long as they have clamping force to the extent that the claws clamp the work W, and in this embodiment, pneumatic cylinders with guides are used. Further, the moving mechanism 41 of the work push-out mechanism 4 also uses a similar cylinder.

As shown in FIG. 1, the origin positions of the cutting claw portion 31 and the holding claw portion 32 are such that when the cutting claw portion 31 is positioned slightly away from the insertion hole 21 and the holding claw portion 32 clamps the workpiece W, the workpiece The axis SC0 of W coincides with the axis SC02 of the workpiece insertion pin 40 of the workpiece push-out mechanism 4 . Since this position differs slightly depending on the size of the work W, the holding claw portion 32 is attached to the moving mechanism 34 so as to be finely adjustable in the direction orthogonal to the axis SC0 of the work W. Further, the moving mechanism 34 may be attached to a frame (base plate) so as to be finely adjustable in a direction orthogonal to the axis SC0 of the workpiece W.

2(a) to 2(c) show the operation order of the cutting claw portion 31 and the holding claw portion 32. FIG. First, the holding claw portion 32 moves from the origin position toward the work holder 2, and the tip enters the work holder 2 through the discharge port 20. As shown in FIG. At this time, depending on the size of the work W, the work W may or may not come into contact with the holding claw portion 32 . This embodiment shows an example when the size of the work W is relatively small (R1/8 or R1/4), and the holding claw portion 32 is in a state slightly separated from the work W (see FIG. 2(a)). . However, it is possible to match the positions of the work W and the claw by matching the claw to each work size and replacing the claw.

Next, the cutting claw portion 31 passes through the insertion hole 21, contacts the longitudinal side surface of the workpiece W, and moves until the opposite longitudinal side surface of the workpiece W contacts the holding claw portion 32 (FIG. 2). (b)).

At this time, the lowermost work W in the work holder 2 to be conveyed is configured with an obtuse angle of 120° that matches the hexagonal portion of the work W in this embodiment. ), the hexagonal portion of the work W abuts on the bottom surface, and the work W above the conveyed work W is also lifted entirely and positioned on the upper surface of the cutting claw portion 31 . The upward movement of the work W differs depending on the size of the work W and the thickness of the claw portion, and the claw portion can also be replaced according to the work W as described above.

With the workpiece W held between the cutting claw 31 and the holding claw 32, both claws move to a position where the axis SC0 of the workpiece W coincides with the axis SC02 of the workpiece insertion pin 40 of the workpiece pushing mechanism 4. (See FIG. 2(c))

After that, the movement mechanism 41 of the work push-out mechanism 4 is operated, the work insertion pin 40 is inserted into the hollow portion of the work W whose axial center is substantially aligned, and the movement is continued while the work W is inserted. to position the screw portion Wa of the work W in the working space S (see the two-dot chain line in FIG. 3).

When it is detected by a mechanical switch or an infrared switch that the work W has reached the working space S, the slide unit 14 is operated to move the pressure roller 11, and the work W is held by the drive roller 10 and the pressure roller. At the same time, feeding of the seal tape T and rotation of the drive roller 10 are started, and the seal tape is wound around the screw portion Wa.

When the work W is held by the drive roller 10 and the pressure rollers 11, 11, the work pushing mechanism 4 is retracted, the work insertion pin 40 is separated from the work W, the winding operation is finished, and the pressure roller 11 , 11 separates from the work W, the work W drops from the work space S by its own weight onto an inclined rail (not shown) and is stored in a storage box (not shown).

By repeating the above-described operation, the work W stored in the work holder 2 can be continuously and unmannedly wrapped with the sealing tape.

As described above, the sealing tape winding device of the present invention can be suitably used as a newly designed sealing tape winding device, and can also be suitably used as an improvement of an existing sealing tape winding device. can.

1 seal tape winding device 10 drive roller 11 pressure roller 2 work holder 20 discharge port 21 insertion port 25 adjustment plate 26 adjustment means 3 work clamping mechanism 31 cutting claw portion 32 holding claw portion 33 movement mechanism 34 movement mechanism 4 work pushing mechanism 40 work insertion pin 41 movement mechanism

Claims (4)

The threaded portion of a hollow cylindrical workpiece having a threaded portion formed at least on one end thereof is positioned in the work space between the drive roller and the pressing roller, and is pressed against the drive roller with a seal tape interposed therebetween, causing the rotation of the drive roller. A sealing tape winding device that winds a sealing tape delivered by being driven to rotate along with the threaded portion,
a work holder for vertically stacking and storing the work so that the axis of the work is substantially parallel to the axis of the drive roller;
a workpiece clamping mechanism having a pair of claws that move in a direction substantially perpendicular to the axis of the driving roller;
a work pushing mechanism having a work insertion pin at its tip for moving the work clamped by the work clamping mechanism to the working space;
The work holder has a discharge port for discharging the work at its lower end and an insertion port opposite to the discharge port for allowing passage of the cutting claw portion of the work clamping mechanism,
The workpiece clamping mechanism includes the cutting claw and a holding claw that moves from a position facing the cutting claw toward the discharge port to hold the workpiece. Having a moving mechanism for moving to a position where the axis of the pin substantially coincides,
The work push-out mechanism includes a moving mechanism for inserting the work insertion pin into the work and for moving the axial center of the drive roller together with the work in a substantially parallel direction to the work space. 2. The seal tape winding device according to claim 1, wherein said work holder comprises an adjusting plate abutting on the longitudinal end surface of the work and adjusting means for adjusting the position of said adjusting plate. 3. The sealing tape winding according to claim 1 or 2, wherein the discharge port of the work holder is provided with a regulating plate for regulating discharge of the work, and the regulating plate opens and closes the discharge port in conjunction with the operation of the work clamping mechanism. Attached device. 4. The sealing tape winding device according to claim 3, wherein said restricting plate is actuated by detecting means for detecting that said holding claw portion has moved to the vicinity of said discharge port.

Images