JP3417329B2 - Tube shape abnormality detection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting the case where the outer diameter of a steel pipe is larger than a predetermined size, the shape of the pipe end is projected from the outer diameter, or the pipe is bent. In particular, the present invention relates to a pipe shape abnormality detection device capable of easily changing a detection plate when the size of a steel pipe to be conveyed is changed.

[0002]

2. Description of the Related Art Conventionally, a steel pipe having an outer diameter larger than a predetermined outer diameter, a tube end shape protruding from the outer diameter, or a bent pipe is detected, and the downstream conveyance is stopped. A pipe shape abnormality detection device that prevents damage to the equipment installed downstream of the transfer line by extracting the corresponding steel pipe from the transfer line is installed in the transfer line of the steel pipe.

A conventional tube shape abnormality detecting device is shown in FIG.
As shown in FIG. 5, the steel pipe P was configured as follows on the line where it is conveyed by the V roller R. In FIG. 5, reference numeral 51 denotes a detection plate in which a semicircular cutout 51a is formed in consideration of the outer diameter tolerance of the steel pipe P having a required outer diameter, and the cutout 51a is provided above and below the cutout 51a.
52 is a shaft that pivotally supports an end portion opposite to the side where the detection plate 51 is formed.

Reference numeral 53 is a bearing for the shaft 52. 54 is
The rotary plate is fixed to the shaft 52 and has a dog 54a formed on the circumferential surface. Reference numeral 55 is a switch that operates when the dog 54a pushes the contact 55a when the rotary plate 54 rotates. Reference numeral 56 is a mount for fixing the bearing 53 and the switch 55.

In the above structure, when the proper steel pipe P is conveyed with a predetermined outer diameter, the steel pipe P passes between the notches 51a, 51a of the detection plates 51, 51, so that the shaft 52
Does not rotate and the switch 55 does not operate.

On the other hand, when a steel pipe P having a portion where the outer diameter is larger than a predetermined outer diameter or a bent portion (hereinafter collectively referred to as abnormal shape portion) is conveyed at the pipe end or the entire pipe, The abnormal shape portion cannot pass between the cutouts 51a, 51a of the detection plates 51, 51, and the abnormal detection portion 51 is pushed by the abnormal shape portion, whereby the shaft 52 and the rotary plate 54 rotate and 54a is contactor 5
When the switch 5a is pressed, the switch 55 is actuated, and a signal for stopping conveyance is transmitted to the conveyance line.

[0007]

By the way, when the outer diameter of the conveyed steel pipe is changed, the pipe shape abnormality detecting device changes the outer shape of the steel pipe having the outer diameter so as to detect the abnormal shape portion. It is necessary to change to a detection plate that has a semicircular cutout that allows for diameter tolerance.

However, in the conventional tube shape abnormality detecting device, the shaft is pivotally supported directly on the detection plate. Therefore, when the detection plate is changed, the pivotal support of the shaft with respect to the detection plate is released.
The detection plate has to be changed, and the shaft must be pivoted again on the detection plate, which is troublesome and time-consuming. The present invention solves the above problems, and an object of the present invention is to provide a tube shape abnormality detection device that can easily change the detection plate.

[0009]

In order to achieve the above-mentioned object, the tube shape abnormality detecting device of the present invention comprises two detecting plates each having a semi-circular cutout in consideration of the outer diameter tolerance of the tube. Each of which is attached to the detection plate, and the detection plate is exposed in a range including a portion where the notch of the detection plate is formed, and two detection plate holding frames are arranged so that the exposed portions face each other. When the abnormal shape of the tube comes into contact with the detection plate exposed from the exposed portion of the plate holding frame, the detection plate and the detection plate holding frame are rotated, and the switch portion is operated by the operating portion. Therefore, when the outer diameter of the pipe to be transported is changed, the detection plate can be attached to the detection plate holding frame, so that the detection plate can be easily changed, and the change of the detection plate does not require labor and time.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION
A semi-circular cutout is formed in consideration of the outer diameter tolerance, two detection plates that make a pair and each of these detection plates are attached, and the detection plate is cut on the surface of the pipe in the conveying direction. Two detection plate holding frames in which exposed portions are formed so as to expose the detection plate in a range including a portion where the notch is formed, and the detection portions are arranged so that the exposed portions face each other;
A shaft pivotally supported at the end of the detection plate holding frame opposite to the side where the exposed part is formed, an operating part provided at the end opposite to the side where the shaft is pivotally supported, and a pipe And a switch unit that is activated by the actuating unit when it contacts the detection plate and moves about the axis.

According to the above construction, the pipe shape abnormality detecting device passes through the notch of the detection plate and conveys the pipe as it is, when the pipe to be conveyed has no abnormal shape, but the pipe is conveyed. If the pipe has an abnormal shape, the abnormal shape cannot pass through the notch of the detection plate, and the abnormal shape comes into contact with the detection plate.

When the abnormal shape of the tube comes into contact with the detection plate, the detection plate and the detection plate holding frame are provided with the operation portion provided on the side opposite to the side provided with the shaft about the axis. The side to be rotated rotates. At this time, the actuating portion is brought into proximity, for example, to actuate the switch portion, and the operation of the switch portion stops the transport of the pipe. In this way, the tube shape abnormality detection device detects that the tube has an abnormal shape.

When the outer diameter of the pipe to be conveyed is changed, it is necessary to change the detection plate in the pipe shape abnormality detecting device accordingly. At this time, in the tube shape abnormality detecting device of the present invention, the shaft is not pivotally supported by the detection plate, but the shaft is pivotally supported by the detection plate holding frame, and the detection plate is attached to the detection plate holding frame. Therefore, at the time of changing the detection plate, the change work is completed simply by removing the detection plate that has been used up to that point from the detection plate holding frame and attaching a newly used detection plate.
Since it did in this way, in the pipe shape abnormality detection device of the present invention, the work of attaching the detection plate can be performed easily and quickly.

Further, in the tube shape abnormality detecting device of the present invention, in the above structure, a fixing mechanism for fixing the detection plate to the detection plate holding frame and the detection plate for the detection plate holding frame. A position adjusting mechanism for adjusting the position of the detecting plate may be provided so that the detecting plate does not rattle in the detecting plate holding frame, and the two detecting plates are mutually delicately aligned. Therefore, the abnormal shape portion can be detected with higher accuracy.

[0015]

EXAMPLE A pipe shape abnormality detecting device of the present invention (hereinafter,
Embodiment) will be described with reference to the schematic configuration diagrams of the detection device of the present invention shown in FIGS. 1 to 4. As shown in FIGS. 3 and 4, the detection device 1 of the present invention is provided on a pedestal B on a line in which a pipe P is conveyed by a V roller R in an arrow direction. Although not shown, an inspection device and the like are arranged downstream of the detection device 1. The detection device 1 detects the presence or absence of an abnormal shape portion in the pipe P, stops the conveyance line when there is an abnormal shape portion, extracts the pipe P from the line, and damages the inspection device in the lower process. And is configured as follows.

Reference numeral 2 denotes a detection plate in which a semicircular cutout 2a is formed in consideration of the tolerance of the outer diameter. The detection plate 2 is made of hard rubber, and two cutouts 2a, 2a are formed in a pair. The pipe P is passed between the notches 2a and 2a so as to face each other. Further, the detection plate 2 is attached to a detection plate holding frame 3 described later,
A fixing notch 2b is formed through which a screw 3d for fixing to the detection plate holding frame 3 is inserted when it is inserted from above in the state shown in FIG. 1B. The detection plate 2 is shown in FIG.
As shown by the chain double-dashed line in (b), a notch 2a having a different size is formed depending on the outer diameter shape of the pipe P to be conveyed, and the notch 2a is appropriately changed.

In the present embodiment, for example, 3 is a detection plate holding frame for holding the detection plate 2 so as to insert the detection plate 2 as a mounting structure, and the detection plate holding frame 3 is a pair of two. The detection plate 2 and the detection plate 2 are paired, and are arranged in a state where exposed portions 3b, 3b described later are opposed to each other. The detection plate holding frame 3 has an opening 3a on the upper surface in the state shown in FIG.
Is formed and is orthogonal to the surface on which the opening 3a is formed, and the cutout of the detection plate 2 is formed in the direction in which the pipe P is conveyed, that is, in the front side to the back side in the state shown in FIG. 1 (b). The exposed portion 3b is formed by exposing the detection plate 2 in a range including the portion where the 2a is formed, for example, a semicircular cutout of a size that allows the maximum diameter steel pipe P manufactured on the line to pass through. Has been done.

Further, the detection plate holding frame 3 is provided on both sides of the upper side of the state shown in FIG. 1B in the conveying direction of the pipe P, the position of the detection plate 2 is adjusted, and the detection plate holding frame 3 of the detection plate 2 is arranged. An adjustment / fixing notch 3c is formed for fixing to the.
The adjusting / fixing notch 3c is provided with a notch 2 for fixing the detection plate 2.
b, and screw 3d to fix notch 2b and adjust
The detection plate 2 can be fixed to the detection plate holding frame 3 with its position adjusted by inserting the fixed cutout 3c and tightening the screw 3d. The adjusting / fixing notch 3c and the screw 3d constitute a fixing mechanism in the detecting device 1 of the present invention.

Further, the detection plate holding frame 3 is provided with a position adjusting mechanism in the detection device 1 of the present invention on the lower surface in the state shown in FIG. 1 (b). In this embodiment, for example, this position adjusting mechanism is provided on the lower surface of the detection plate holding frame 3 in order to insert the detection plate 2 downward from the opening 3a of the detection plate holding frame 3 as shown in FIG. The vertical position of the detection plate 2 in the detection plate holding frame 3 is finely adjusted.

That is, the position adjusting mechanism is configured to penetrate the lower surface of the detection plate holding frame 3 and screw the two bolts 3f into and out of the positions corresponding to both ends of the lower surface of the detection plate 2. When the bolt 3f penetrating the lower surface of the detection plate holding frame 3 is tightened, the tip of the bolt 3f pushes up the lower surface of the detection plate 2 so that the position adjustment mechanism finely adjusts the detection plate 2 in the detection plate holding frame 3. Be seen. The position adjusting mechanism has two bolts 3f not only for fine adjustment of the vertical position of the detection plate 2 but also for fine adjustment of the inclination by varying the tightening amounts of the two bolts 3f. This is to do it.

A bearing 3g for pivotally supporting a shaft 4, which will be described later, is formed at the end of the detection plate holding frame 3 opposite to the side where the exposed portion 3b is formed. In this way, the detection plate holding frame 3 has the exposed portion 3 as shown in FIGS.
b are arranged facing each other, the detection plate 2 is exposed from the exposed portion 3b in a range including the notch 2a of the detection plate 2 inserted from the opening 3a, and the detection mechanism 2 is exposed by the fixing mechanism and the position adjusting mechanism. The detection plate 2 is positioned and fixedly held in the detection plate holding frame 3.

Reference numeral 4 is a shaft pivotally supported by a bearing 3g of the detection plate holding frame 3, and the lower end portion of the shaft 4 in the state shown in FIG. 1 is attached to a pedestal B constituting a transfer line. As a result, the detection plate holding frame 3 has the exposed portion 3 centered around the shaft 4.
The side where b is formed rotates.

Reference numeral 5 denotes an end portion of the detection plate holding frame 3 opposite to the side where the bearing 3g is formed, and an operating portion provided on the lower surface of the detection plate holding frame 3 in the state shown in FIG. 1 (b). Is.

Reference numeral 6 denotes a switch portion that is turned on when the detection plate holding frame 3 is rotated in proximity to the operating portion 5, and the switch portion 6 is provided on the base B. It is arranged on 6a.

The detecting device 1 having the above-mentioned structure has an appropriate outer diameter,
When there is no outer diameter protruding portion such as a burr at the end of the pipe P and the pipe P having no bending is conveyed over the entire long pipe P, the cutouts of the detection plates 2 and 2 are formed. Therefore, the actuating portion 5 does not actuate the switch portion 6 by passing between 2a and 2a.

On the other hand, when there is a portion larger than the outer diameter of the pipe P, when an outer diameter protruding portion such as a burr is formed at the end of the pipe P, or over the entire long pipe P. When the pipe P has an abnormal shape such as when it is bent, the detection device 1 detects the abnormal shape.

That is, in the detection device 1, the detection plate 2
When the pipe P tries to pass between the notches 2a and 2a of
The abnormal shape portion contacts one or both of the detection plates 2 and 2. Now, the description will be continued assuming that the abnormal shape portion abuts on one of the detection plates 2. When the abnormal shape portion comes into contact with the detection plate 2, this causes the detection plate 2 and the detection plate holding frame 3 to
The side on which the notch 2a and the exposed portion 3b are formed rotates about the shaft 4 in the transport direction of the pipe P.

When the detection plate 2 and the detection plate holding frame 3 rotate about the shaft 4, the operating portion 5 also moves and the switch portion 6 moves.
When the switch portion 6 detects this, the switch portion 6 is turned on, and the conveyance of the pipe P on the conveyance line is immediately stopped.
As a result, the pipe P that is about to pass through the detection device 1 now
It is possible to detect that there is an abnormal shape in the. Then, if the pipe P having the abnormal shape is extracted from the transport line, the inspection device and other equipment in the lower step will not be damaged.

By the way, when the conveyance of the pipe P having a certain outer diameter is completed and the pipe P having a different outer diameter is conveyed, a notch corresponding to the outer diameter of the pipe P to be conveyed next is formed. 2a
It is necessary to change to the detection plate 2 formed with the above, and the detection device 1 of the present invention is characterized in that the change of the detection plate 2 does not require labor and time.

That is, in the detection device 1, the detection plate 2
To change the value, loosen the screw 3d to release the fixation of the detection plate 2 to the detection plate holding frame 3, and fix the screw 3d to the adjustment / fixing notch 3c of the detection plate holding frame 3 and the detection plate 2. Cutout 2
Remove from b. Then, the detection plate 2 is pulled out from the opening 3a, and the detection plate 2 to be changed is inserted from the opening 3a.

After inserting the detection plate 2 to be changed through the opening 3a, the screw 3d is inserted into the fixing notch 2b of the detection plate 2,
In this state, the position of the screw 3d is adjusted within the range of the adjustment / fixation notch 3c of the detection plate holding frame 3, and when the position can be adjusted, the screw 3d is tightened to temporarily fix the detection plate 2 and the detection plate holding frame 3 together. To do.

After the above, the bolts 3f provided on the lower surface of the detection plate holding frame 3 are tightened or loosened so that the cutouts 2a formed between the two detection plates 2 and 2 have a substantially circular shape. As described above, after finely adjusting the inclination and the vertical position of the detection plates 2 and 2 in the detection plate holding frames 3 and 3, the screws 3d are finally tightened and fixed. Thus, the work of changing the detection plates 2 and 2 is completed.

In the conventional tube shape abnormality detecting device, since the detecting plate is directly pivoted on the shaft, when changing the detecting plate,
It takes time and effort to remove the shaft from the detection plate, attach the detection plate to be changed to the shaft, and attach the shaft to the main body of the apparatus, and this work causes an error in the mounting position of the detection plate.

On the other hand, in the detection device 1 of the present invention, the detection plates 2 and 2 are changed by removing the used detection plates 2 and 2 from the detection plate holding frames 3 and 3. 2, 2
Is only required to be inserted into the detection plate holding frames 3 and 3, which is easy and does not require labor and time.

Further, in the detection device 1 of the present invention, the notch 2 of the detection plates 2 and 2 temporarily inserted in the detection plate holding frames 3 and 3 is provided.
When the a and 2a need to be adjusted in position, they can be adjusted by the screw 3d of the fixing mechanism and the bolt 3f of the position adjusting mechanism, so that the abnormal shape portion of the pipe P can be detected accurately.

The detection apparatus 1 of the present invention is not limited to the above embodiment, but various modifications can be made. For example, the mounting structure of the detection plate 2 and the detection plate holding frame 3 is
Although the detection plate 2 is inserted into the detection plate holding frame 3, instead of this, for example, a bolt insertion hole is formed in the peripheral portion of the detection plate 2 and the detection plate holding frame 3 at the same position to form the detection plate. 2 and the detection plate holding frame 3 may be overlapped with each other and fixed by a bolt and a nut.

Further, although the exposed portion 3b of the detection plate holding frame 3 has a semicircular shape in the above embodiment, it is not limited to this.
It may be rectangular. Further, in FIGS. 1 and 2 in the embodiment, for the sake of explanation, the detection plate holding frames 3 and 3 and the detection plates 2 and 2 are shown with a relatively large distance, but in reality, one detection plate holding frame is used. The gap 3 is so small that it does not come into contact with the other detection plate holding frame 3.

Further, the switch section 6 is turned on when the operating section 5 approaches in the above embodiment, but it is turned on when the operating section 5 is in contact or pressed. May be.

[0039]

As described above, according to the pipe shape abnormality detecting device of the present invention, the detection plate is pivotally supported on the shaft, and the detection plate is exposed in a range including a portion where the notch of the detection plate is formed. Since the detection plates are respectively attached to the two detection plate holding frames arranged so as to face each other, it is possible to easily change the detection plates.

Further, in the tube shape abnormality detecting device of the present invention, in the above structure, a fixing mechanism for fixing the detection plate to the detection plate holding frame and the detection plate for the detection plate holding frame. If a position adjusting mechanism for adjusting the position is provided, it is possible to perform fine adjustment of the position of the detection plate inserted in the detection plate holding frame or position fixing after the fine adjustment, so that the position of the pipe having a large outer diameter or A portion protruding from the outer diameter at the pipe end,
It is possible to detect the bent portion in the entire length of the pipe more accurately than in the above configuration.

[Brief description of drawings]

FIG. 1 (a) in a tube shape abnormality detecting device of the present invention.
FIG. 3 is a diagram showing a detection plate, and FIG.

FIG. 2 (a) is a view of a pipe shape abnormality detection device of the present invention in which a detection plate is inserted, as seen from above a pipe transport line;
(B) is the figure seen from the conveyance line direction of a pipe.

FIG. 3 is a view showing a pipe shape abnormality detecting device of the present invention on a pipe transport line, as viewed from above the pipe transport line.

FIG. 4 is a view showing a pipe shape abnormality detecting device of the present invention on a pipe transport line, as viewed from the side of the pipe transport line.

5A and 5B are views showing a conventional pipe shape abnormality detecting device, FIG. 5A being a view seen from a pipe conveying line direction, and FIG.

[Explanation of symbols]

1 (Abnormal tube shape) detector 2 Detection plate 2a cutout 3 Detection plate holding frame 3a opening 3b Exposed part 3c Adjustment / fixation notch 3d screw 3f bolt 4 axes 5 working part 6 switch part P tube

Claims (2)

(57) [Claims] 1. A two-sided detection plate provided on a conveyance line and having semicircular cutouts that allow for an outer diameter tolerance, and the cutouts of these detection plates that face each other and are formed by this. In a pipe shape abnormality detecting device for detecting a pipe outer diameter shape abnormality by passing a pipe between the cutouts, two detection plates which are paired, and each of these detection plates are attached, and An exposed portion is formed so as to expose the detection plate in a range including a portion where the notch of the detection plate is formed, on the surface in the conveying direction, and the exposed portions face each other. The two detection plate holding frames to be arranged, the shafts pivotally supported at the ends of the detection plate holding frames opposite to the side where the exposed portions are formed, and the side opposite to the side where the shafts are pivotally supported. The working part at the end and the tube come into contact with the detection plate, A tube shape abnormality detection device, comprising: a switch unit that is activated by the actuation unit when moved to the heart. 2. The detection plate holding frame is provided with a fixing mechanism for fixing the detection plate in the detection plate holding frame, and a position adjusting mechanism for adjusting the position of the detection plate with respect to the detection plate holding frame. The tube shape abnormality detection device according to claim 1.