KR101126009B1 - Jointing structure of steel pipes and steel pipe pole with the structure - Google Patents

Abstract

It is to provide a joint structure of a steel pipe pole and a steel pipe pole in which the structure is simple and easy to construct, which can reduce the cost and shorten the air. The lower steel pipe provided with the plurality of first displacement preventing ribs 5 at substantially equal intervals in the circumferential direction of the inner wall near the upper end, in addition to providing the supporting bottom plate 4 at a predetermined depth position from the upper end ( 2a) and a plurality of second displacements at substantially equal intervals in the circumferential direction of the inner wall near the upper end, while providing the supporting bottom plate 4 at a predetermined depth position from the upper end with a smaller diameter than the lower steel pipe 2a. The prevention rib 5a is provided, and the upper steel pipe 2b provided with the some 3rd displacement prevention rib 8 at substantially equal intervals in the circumferential direction of the outer wall near the lower end part is provided, and the lower part of the upper steel pipe 2b is provided. In the lower steel pipe 2a, the lower end thereof is inserted until it comes into contact with the supporting bottom plate 4 of the lower steel pipe 2a, thereby filling the concrete 20 between the upper steel pipe 2b and the lower steel pipe 2a. (Iii).

Description

JOINTING STRUCTURE OF STEEL PIPES AND STEEL PIPE POLE WITH THE STRUCTURE}

The present invention relates to, for example, a joining structure of a steel pipe pawl for pulling a golf ball net provided on a golf driving range or the like and a steel pipe pawl joined thereto.

For example, in a golf practice field and a golf course, a plurality of props (steel pipe poles) are set up and installed around the site and the course, and a net is applied to the props so that the golf balls fly out of the market. (飛散) is prevented.

Since these pillars usually have several tens of meters in height, several ten-meter-long pipes of 10-15 meters in length are transported in series and installed on the ground. have.

In this method of connecting a small diameter pipe, the rear end of the upper small diameter pipe is inserted into the distal end of the large diameter pipe in the lower portion of the small diameter pipe. While the trailing edge is brought into contact with the bottom plate of the large diameter tube and the upper and lower directions are positioned, the rear end portion of the small diameter tube is inserted into the first centering rib and automatically centered. The second centering rib of the small diameter tube is inserted into the distal end of the large diameter tube and automatically centered. Then, the second centering rib of the small diameter tube is welded to the distal edge of the large diameter tube to fix the distal end of the large diameter tube. By filling the gap between the pipe and the rear end of the small diameter pipe, a filler for reinforcement may be connected so as to completely connect both pipes without the gap (for example, See Patent Document 1).

In addition, a bottom plate and a guide rib are provided inside the distal end of the large diameter tube, and a fixed rib having a bolt insertion hole is provided in the distal end, and the base end of the small diameter tube is also provided. ) At the outer periphery, a finishing inlet rib having a bolt insertion hole is provided, and a proximal end of the small diameter tube is inserted in the tip of the large diameter tube, abuts against the bottom plate, and the fixing rib and the finishing inlet rib are fixed to the bolt and nut. By fixing. Thereafter, a gap between the inner circumference of the large diameter pipe and the outer circumference of the small diameter pipe is filled with a filler for reinforcing such as concrete (see Patent Document 2, for example).

(Patent Document 1)

Japanese Patent Laid-Open No. 7-71428 (page 3-4, Fig. 1-4)

(Patent Document 2)

Japanese Patent Laid-Open No. 9-195585 (page 2-3, Figs. 1-4)

In the invention of Patent Literature 1, a plurality of first centering ribs are welded and joined to an inner wall of a lower diameter tube (upper part of a seat plate), and a plurality of second centering ribs are provided near an opening of a large diameter tube of a small diameter tube outer wall. A plurality of guide ribs are welded to the lower inner wall of the large diameter pipe of Patent Document 2, and a plurality of fixed ribs and hanging brackets are welded to the upper inner wall, and a plurality of guide ribs are welded to the vicinity of the opening of the large diameter pipe of the outer wall of the small diameter pipe. Since the finishing inlet ribs are welded and joined, not only are these welds extremely large, but also require a great deal of labor, and the positioning of the second centering rib and the finishing inlet rib is cumbersome.

In addition, the plurality of second centering ribs and the finishing inlet ribs provided on the outer wall of the small diameter tube protrude outwards above the upper end of the large diameter tube, and thus have a problem that they cannot be smoothly pulled when pulling over the net.

Moreover, the invention of Citation Document 1 fixes a plurality of second centering ribs provided in the small diameter pipe by welding to the upper end of the large diameter pipe, and the invention of Citation 2 is a plurality of the large diameter pipes. The fixing ribs and the plurality of finishing inlet ribs installed on the small diameter pipes are fixed by bolts and nuts. Therefore, fixing work, especially in high places, is cumbersome and requires a lot of labor. Due to the fixing work by bolts and nuts, it is necessary to install a large scale scaffolding over the entire periphery of the shore and near the top, thereby increasing the construction cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and is simple in structure, easy to construct, and can reduce costs, and also has workability, safety, and quality that can shorten air. An object of the present invention is to provide a joint structure and a steel pipe pole of a steel pipe pole having high reliability in manageability.

The joining structure of the steel pipe pawl according to the present invention is provided with a plurality of first displacements at substantially equal intervals in the circumferential direction of the inner wall near the upper end, in addition to providing a supporting bottom plate at a predetermined depth position from the upper end.位) The lower steel pipe provided with the prevention rib, and the support base plate at a predetermined depth position from the upper end with a smaller diameter than the lower steel pipe, and the circumference of the inner wall near the upper end The upper steel pipe provided with a plurality of second displacement preventing ribs at substantially equal intervals in the direction, and provided with a plurality of third displacement preventing ribs in the circumferential direction of the outer wall near the lower end, wherein the lower portion of the upper steel pipe In which the lower end of the upper steel pipe is inserted until it comes in contact with the supporting bottom plate of the lower steel pipe, and the concrete is filled between the upper steel pipe and the lower steel pipe. The.

Further, in the joining structure of the steel pipe pole, a bottom plate is provided at the lower end of the upper steel pipe, a plurality of support legs are provided on the lower surface of the bottom plate, and a lower portion of the upper steel pipe is placed in the lower steel pipe. When inserted, a space portion was formed between the supporting bottom plate of the lower steel pipe and the bottom plate of the upper steel pipe.

Further, in the joining structure of the steel pipe pole, a plurality of support ribs are provided on the inner circumferential surface at a predetermined depth position from the upper end of the lower steel pipe at substantially equal intervals to attach a support bottom plate to the lower end of each of the support ribs. And installing a bottom plate at the lower end of the upper steel pipe, and when the lower portion of the upper steel pipe is inserted into the lower steel pipe, the bottom plate of the upper steel pipe abuts the support ribs to support the bottom of the bottom plate and the lower steel pipe. The space part was formed between plates.

Further, the first displacement preventing ribs provided in the lower steel pipe, the second displacement preventing ribs and the third displacement preventing ribs provided in the upper steel pipe were formed of U-shaped steel or plate-shaped steel.

The steel pipe pawl according to the present invention is configured by sequentially joining a plurality of upper steel pipes having a smaller diameter toward the upper portion of the upper steel pipe bonded to the lower steel pipe by the above, in substantially the same structure as the upper steel pipe.

In addition, cover plates were respectively provided on the outer periphery of the junction between the lower steel pipe and the upper steel pipe.

According to the present invention, it is possible to obtain a highly reliable structure of the joining of the steel pipe poles and the steel pipe poles, which can simplify the construction, reduce the cost, and shorten the air.

[First Embodiment]

BRIEF DESCRIPTION OF THE DRAWINGS The cross section explanatory drawing of the joining structure of the steel pipe pawl which concerns on 1st Embodiment of this invention, FIG. 2 is the top view, the longitudinal cross-sectional view, and the displacement prevention rib of the lower steel pipe of FIG. 3 is a plan view and a longitudinal sectional view of the upper steel pipe of FIG. In addition, as shown in FIG. 5, the lower steel pipe embedded in the ground and the lower steel pipe when a plurality of two diameter steel pipes are joined one by one to form a steel pipe pole as shown in FIG. Represents the upper steel pipe.

In the drawing, 2a is a lower steel pipe which is a lower steel pipe of the steel pipe pole 1 constituting a plurality of different diameter steel pipes joined in the vertical direction, and 2b is an upper steel pipe which is integrally joined by being inserted into the lower steel pipe 2a. to be.

The lower steel pipe 2a is made of, for example, a steel pipe having an length L 12m in the axial direction, an outer diameter D l.7m and an inner thickness t 18mm, and from the upper end thereof, for example, one quarter On the inner wall of the depth position (about 3 m), the plurality of support ribs 3 are welded to each other at substantially equal intervals in the circumferential direction, and a disc-shaped support bottom plate 4 is mounted on the support ribs 3. Welded and joined.

5 denotes a plurality of substantially c-shaped steels welded and joined at substantially equal intervals in the circumferential direction of the inner wall in the vicinity of the upper opening of the lower steel pipe 2a (the eight cases are shown in the drawings, but the present invention is limited to this). In the first displacement preventing rib (Fig. 2 (c)), the web is made circumferential and the flange is made up and down, and the side edge is welded to the inner wall of the lower steel pipe 2a. The inner diameter dl which connects the inner edge of this 1st displacement prevention rib 5 is formed slightly larger (for example, about 6-10 mm) than the outer diameter D2 of the upper steel pipe 2b. 6 is a fastening hole provided in the web of the 1st displacement preventing rib 5, and a tool for hanging, such as a shackle of a heavy machinery crane, is caught.

The upper steel pipe 2b is made of, for example, a steel pipe having an axial length L 15m, an outer diameter D2 1.5m, and a thickness t1 5mm, and is approximately D-D2 ≒ 200 mm. Then, a plurality of support ribs 3 are welded and joined to the inner wall at a depth position of, for example, about one fifth (about 3 m) from the upper end portion at substantially equal intervals in the circumferential direction, and on the support bottom plate ( 4) is mounted and welded together.

5a is a plurality of substantially C-shaped steels welded and welded at substantially equal intervals in the circumferential direction of the inner wall in the vicinity of the upper opening portion (as shown in the figure, although eight cases are shown) It is not limited to the second displacement preventing rib, and the locking hole 6 is provided in the web. 7 is a bottom plate which closes a lower opening part, but this may be abbreviate | omitted.

8 is a third displacement preventing rib composed of a plurality of substantially C-shaped steels welded and joined at substantially equal intervals in the circumferential direction of the lower outer wall, but not limited thereto. The outer diameter d2 connecting the outer edge is formed slightly smaller (for example, about 6 to 10 mm) than the inner diameter Dl of the lower steel pipe 2a.

The upper steel pipe 2b constructed as mentioned above is inserted in the lower steel pipe 2a until the lower end part contacts the support base plate 4. At this time, between the first displacement preventing rib 5 of the lower steel pipe 2a and the outer circumferential wall of the upper steel pipe 2b, and the third displacement preventing rib 8 and the lower steel pipe 2a of the upper steel pipe 2b. The gap between the inner circumferential wall of the upper steel pipe 2b and the inner circumferential wall of the upper steel pipe 2b is formed and positioned between the inner circumferential wall of the lower steel pipe 2a. In the gaps (for example, about 80 mm) are formed.

And when the concrete 20 is filled between the lower steel pipe 2a and the upper steel pipe 2b, both are firmly fixed. In addition, the numerical value of said each part shows an example, and is not limited to this.

Next, an example of the joining procedure of the steel pipe pole which concerns on this embodiment is demonstrated by FIG. In addition, the support rib 3 of the lower steel pipe 2a, the support bottom plate 4, the first displacement preventing rib 5, and the support rib 3 of the upper steel pipe 2b, the support bottom plate 4, The 2nd displacement prevention rib 5a, the bottom plate 7, and the 3rd displacement prevention rib 8 are processed and attached previously by a factory etc., and this is conveyed locally. In addition, depending on the situation, the above-described support ribs 3 may be attached on the spot.

First, as shown in Fig. 4 (a), the installation hole 31 of the lower steel pipe 2a is excavated in the ground 30, and the shackle of the heavy machinery crane (not shown) is lowered to the lower steel pipe 2a. The lower steel pipe 2a is hung up by hanging on the locking hole 6 provided in the first displacement preventing rib 5, and the lower hole is lowered to the installation hole 31 until the upper opening is almost flush with the surface. And sweetie.

Subsequently, the upper steel pipe 2b is suspended by a crane and brought in over the lower steel pipe 2a, and the third displacement preventing rib 8 is interposed between the first displacement preventing ribs 5 of the lower steel pipe 2a. 4B, the upper steel pipe 2b is lowered and the lower portion thereof is inserted into the lower steel pipe 2a. And when a lower end part contacts the support bottom plate 4 of the lower steel pipe 2a, a fall is stopped and a shackle is removed.

At this time, a slight gap is formed between the outer circumferential wall of the first displacement preventing rib 5 and the upper steel pipe 2b, and the inner circumferential wall of the third displacement preventing rib 8 and the lower steel pipe 2a. The lower portion of the steel pipe 2b can be smoothly inserted into the lower steel pipe 2a. In addition, the upper steel pipe 2b is supported by the first and third displacement preventing ribs 5 and 8 so as to stand vertically in the lower steel pipe 2a.

Next, as shown in FIG. 4C, the concrete 20 is filled between the lower steel pipe 2a and the upper steel pipe 2b. In addition, you may remove the shackle of a crane after the concrete 20 is filled. As the concrete 20 is fixed, the upper steel pipe 2b is firmly joined to the lower steel pipe 2a integrally.

Finally, as shown in FIG.4 (d), the conical cover plate 10 of which the head was almost cut off is attached to the outer periphery of both joining parts.

According to this embodiment comprised as mentioned above, as shown in FIG. 5, the vertical load by pulling over a net is supported by the support base plate 4 of the lower steel pipe 2a, and a bending moment ) Is the resistance of the first and third displacement preventing ribs 5 and 8 and the acupressure reaction force of the concrete 20 filled between the lower steel pipe 2a and the upper steel pipe 2b. Supported. In this case, since the 1st and 3rd displacement preventing ribs 5 and 8 were comprised with the U-shaped steel material, a bearing force can be heightened further. In addition, the shear force is supported by the compressive force of the concrete.

Further, since the displacement preventing ribs 5 are fixed to the lower steel pipe 2a, and the displacement preventing ribs 8 are fixed to the upper steel pipe 2b, the tension between the upper steel pipe 2b and the lower steel pipe 2a Even when a pull occurs and the pulling force acts, the displacement preventing ribs 5 and the displacement preventing ribs 8 are embedded in the concrete 20, and thus the resistance against the tensile force is caused by the compressive force of the concrete 20. Can be firmly bonded.

(Example)

FIG. 6 shows an example of the embodiment of the steel pipe pawl 1 in which the upper steel pipe 2b having different diameters and the second to fifth upper steel pipes 2c to 2n are sequentially joined to the lower steel pipe 2a in the same order as described above. It is explanatory drawing. The second to fourth upper steel pipes 2c to 2e have smaller diameters as they become upper portions, but have substantially the same structure as the upper steel pipe 2b described above, and the fifth upper steel pipe 2n has a support rib ( 3), the support base plate 4 and the 2nd displacement preventing rib 5b are abbreviate | omitted, and the metal fitting 9 for suspending a net is provided in the vicinity of an upper end part.

The specification of each steel pipe which comprises the steel pipe pawl 1 of a present Example is shown in Table 1.

The upper steel pipe 2b is bonded to the lower steel pipe 2a embedded in the ground in the above-described order, and then the second upper steel pipe 2c is bonded to the upper steel pipe 2b in the same order. In the same procedure, the third to fifth upper steel pipes 2d to 2n were joined in sequence to construct a steel pipe pawl 1 having a height of 59.5 m from the surface of the earth. In the case of construction, since no welding or screw tightening was required at the joint, a simple scaffold was installed only on one side.

(Table 1)

     Steel pipe Length L
m OD D
m Flesh thickness t
mm  Lower steel pipe (2a)     12     1.7     18  Upper steel pipe (2b)     15     1.5     15  Second upper steel pipe 2c     15     1.3     14  3rd upper steel pipe (2d)     15     1.1     14  4th upper steel pipe (2e)     15     0.9     13  5th upper steel pipe (2f)     14.5     0.7     11

In the above description, the case in which six different diameter steel pipes including the lower steel pipe 2a are sequentially joined to form a steel pipe pole 1 is shown. It does not limit, It can increase or decrease suitably according to the construction site situation. In addition, the numerical value shown in Table 1 shows an example, and is not limited to this.

According to this embodiment, since a structure is simple and there are few uses members, the 1st displacement prevention rib 5 is provided in the inner wall of the upper opening vicinity of the lower steel pipe 2a, and the upper opening part of the upper steel pipe 2b is further provided. Since the second displacement preventing rib 5a is provided on the inner wall nearby and the third displacement preventing rib 8 is provided on the outer wall near the lower end, it is easy to manufacture in a factory or the like, and the manufacturing maneuver and cost are the case of the conventional bolted joint. It can reduce about 20% compared with (the technique of patent document 2).

In addition, the finished lower steel pipe 2a and the plurality of upper steel pipes 2b to 2n are brought into the site as appropriate, and the small steel pipe and the simple scaffolding of the upper steel pipe 2b to the lower steel pipe 2a. Since it can be assembled easily by inserting a lower part and filling concrete between them, and joining the upper steel pipes 2c-2n one by one below, it can be easily constructed even in a narrow place, a city, etc.

Moreover, since the workability is good, compared with the conventional welding joint (the technique of patent document 1) and the bolt joint (the technique of patent document 2), air can be shortened significantly and construction cost can be reduced. As a result, highly reliable steel pipe pawls with excellent workability, safety and quality can be obtained.

Moreover, since the conical cover plate 10 which cut out the head was provided in the outer periphery of each joining part, when a net is pulled over, the net does not get caught in the upper end part of a lower steel pipe, or a displacement prevention rib, and it can install smoothly and install it. have.

Second Embodiment

It is sectional explanatory drawing of the bonding structure of the steel pipe pawl which concerns on 2nd Embodiment of this invention. In addition, the same code | symbol as this is attached | subjected to the part same as 1st Embodiment, and description is abbreviate | omitted.

In the present embodiment, the bottom plate 7 is provided in the lower opening of the upper steel pipe 2b (including the upper steel pipes 2c to 2n in FIG. 6), and the circumference of the bottom surface of the bottom plate 7 is provided. At substantially equal intervals in the direction, for example, a plurality of supporting legs 11 made of flat steel materials and having the same height are welded and provided.

In the present embodiment configured as described above, when the lower portion of the upper steel pipe 2b is inserted into the lower steel pipe 2a, the support legs 11 abut against the supporting bottom plate 4 of the lower steel pipe 2a. Positioning is carried out, and the space part 12 corresponding to the height of the support leg 11 is formed between the support bottom plate 4 and the bottom plate 7. As a result, the concrete 20 filled between the lower steel pipe 2a and the upper steel pipe 2b is also filled in the space 12.

8 is a cross-sectional explanatory diagram showing another example of the present embodiment.

In the case of FIG. 7, the case where the several support leg 11 was provided in the lower surface of the bottom plate 7 of the upper steel pipe 2b was shown, In this example, the support leg provided in the upper steel pipe 2b is shown. (11) is omitted, and the support base plate 4 is welded and joined to the lower surface of the several support rib 3 provided in the inner periphery of the lower steel pipe 2a.

Then, when the lower portion of the upper steel pipe 2b is inserted into the lower steel pipe 2a, the bottom plate 7 abuts against the support ribs 3 and is positioned to support the bottom plate 4 and the bottom plate 7. The space part 12 is formed between () and ().

According to this example, since the support rib 3 was used as a support leg, the cost can be reduced by that much.

The construction procedure, operation, and effect of the present embodiment are almost the same as those of the first embodiment, but between the supporting bottom plate 4 of the lower steel pipe 2a and the bottom plate 7 of the upper steel pipe 2b. Since the space portion 12 is provided and the concrete portion 20 is also filled in the space portion 12, both of them can be more firmly coupled to improve the verticality of the upper steel pipe 2b.

[Third Embodiment]

9 is a cross-sectional explanatory view of a joining structure of a steel pipe pawl according to a third embodiment of the present invention, (a) is a plan view and a longitudinal sectional view of a lower steel pipe, and (b) is a plan view and a longitudinal sectional view of an upper steel pipe. In addition, the same code | symbol as this is attached | subjected to the part of the function same or same as 1st Embodiment, and a part of description is abbreviate | omitted.

In the first embodiment and the second embodiment, the first embodiment includes the first displacement preventing ribs 5 and the upper steel pipes 2b (the upper steel pipes 2c to 2n in FIG. 6) provided in the lower steel pipes 2a. The 2nd displacement prevention rib 5a and the 3rd displacement prevention rib 8 which were provided in () are used instead of a c-shaped steel material, and the flat steel material is used.

Although the construction order, effect | action, and effect of this embodiment are substantially the same as the case of 1st Embodiment, since the 1st-3rd displacement preventing ribs 5, 5a, 8 were formed from flat steel plate, cost was further reduced. can do.

BRIEF DESCRIPTION OF DRAWINGS Fig. 1 is a cross-sectional explanatory diagram of a joining structure of a steel pipe pole according to a first embodiment of the present invention.

2 is a plan view, a longitudinal sectional view, and a perspective view of first to third displacement preventing ribs of the lower steel pipe of FIG.

3 is a plan view and a longitudinal sectional view of the upper steel pipe of FIG.

4 is an explanatory diagram of an example of a bonding procedure of the first embodiment;

5 is an explanatory diagram of the operation of the first embodiment;

FIG. 6 is an explanatory view of an embodiment of a steel pipe pole joined by FIG. 4. FIG.

Fig. 7 is a cross-sectional explanatory diagram of a joining structure of a steel pipe pole according to a second embodiment of the present invention.

8 is an explanatory cross-sectional view of another example of the second embodiment.

9 is an explanatory cross-sectional view of a joining structure of a steel pipe pole according to a third embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

1: steel pipe pole 2a: lower steel pipe

2b to 2n: upper steel pipe 3: support rib

4: support base plate 5: first displacement preventing rib

5a: second displacement preventing rib 6: locking hole

7: Bottom plate 8: Third displacement preventing rib

9: hanging bracket 10: cover plate

11: Support leg (support angle) 12: Space part

20: concrete

Claims (6)

A lower steel pipe provided with a support bottom plate at a predetermined depth position from an upper end portion, and provided with a plurality of first displacement preventing ribs in the circumferential direction of the upper inner wall; , In addition to providing a support bottom plate at a predetermined depth position from the upper end with a smaller diameter than the lower steel pipe, a plurality of second displacement preventing ribs are provided in the circumferential direction of the upper inner wall, and the circumference of the lower outer wall. An upper steel pipe provided with a plurality of third displacement preventing ribs in a direction; A lower portion of the upper steel pipe is inserted into the lower steel pipe until a lower end of the upper steel pipe contacts the support bottom plate of the lower steel pipe, and concrete is filled between the upper steel pipe and the lower steel pipe. Joint structure of steel pole. The lower steel pipe of claim 1, wherein a bottom plate is provided at a lower end of the upper steel pipe, a plurality of support legs are provided on a lower surface of the bottom steel plate, and a lower portion of the upper steel pipe is inserted into the lower steel pipe. A joining structure for steel pipe poles, wherein a space portion is formed between the bottom plate and the bottom plate of the upper steel pipe. The upper steel pipe according to claim 1, wherein a plurality of support ribs are provided on an inner circumferential surface of a predetermined depth position from an upper end of the lower steel pipe to attach a support bottom plate to each lower end of each of the support ribs. When the bottom plate of the lower steel pipe is inserted into the lower steel pipe and the lower plate of the upper steel pipe is inserted into the lower steel pipe, the bottom plate of the upper steel pipe abuts against the supporting rib and between the bottom plate and the supporting bottom plate of the lower steel pipe. The joining structure of steel pipe poles provided with the space part in it. The U-shaped steel according to any one of claims 1 to 3, wherein the first displacement preventing rib provided on the lower steel pipe, the second displacement preventing rib and the third displacement preventing rib provided on the upper steel pipe are formed in a U-shape. Or it is formed of a plate-shaped steel material, the joining structure of the steel pipe poles. The upper steel pipe joined to the lower steel pipe according to any one of claims 1 to 3 has the same structure as that of the upper steel pipe, and is formed by sequentially joining a plurality of upper steel pipes which become smaller in diameter upwards. Steel pipe pole. The steel pipe pawl according to claim 5, wherein a cover plate is provided on an outer circumference of the junction between the lower steel pipe and the upper steel pipe, respectively.

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