JPH0142767B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a reel in which adjacent segments of a plurality of cylindrically arranged segments are connected by a tension spring and a guide pin so that the segments expand and contract. The present invention relates to a method for manufacturing a diameter changing attachment device.

(Prior Art) Unwinding reels and take-up reels are installed on the input and output sides of continuous processing lines and processing lines for metal strips. These reels have a structure in which the roll segments are expanded and contracted in the radial direction using a wedge mechanism or a link mechanism, but since there is a certain limit to expansion and contraction, it is necessary to attach a coil with an inner diameter larger than the maximum diameter when expanded. When winding the reel, an attachment is attached to the outside to increase the outside diameter of the reel.

Conventionally, this attachment was generally a method in which arc-shaped segments were fixed to the outside of multiple reel segments with bolts, etc.
This method requires time and effort to install, so in recent years, multiple circular segments have been arranged in a cylindrical shape, and guide holes extending in the diameter direction of the cylinder have been provided at both ends of each segment in the arc direction. Hooks for hanging tension springs are provided on the inside of both ends, guide pins are fitted into each guide hole of the adjacent segment, and a tension spring is hung for each hook to allow each segment to expand and contract. A modification attachment device is used.

There are two types of attachment devices for changing the reel diameter: one that increases the outer diameter by adjusting the thickness of the segment itself, and the other that increases the outer diameter by fixing ribs along the arc direction inside the segment. Figures 1 to 9 show an example of the latter attachment device for changing the reel diameter. In these figures, 1 is a steel arc-shaped segment arranged in a cylindrical shape, 2 is a rib welded inside this segment 1 along the arc direction, and 3 is a hole at the end of the segment 1 in the arc direction. The guide hole extends in a direction parallel to the diameter of the cylinder and passes through the rib 2. As this guide hole 3, there is also one in which a protrusion is fixedly fixed to the inside of the end in the circular arc direction and provided there. Reference numeral 4 denotes a hook whose lower part is embedded inside the end of the segment in the arcuate direction. The guide hole 3 and hook 4 of each adjacent segment are opposite to each other, a guide pin 5 is inserted into the guide hole 3, and a tension spring 6 is applied to the hook 4, so that the segment 11
is starting to expand and contract.

Reference numeral 7 denotes a groove provided for inserting the saber 8, which is bored in the end face of the segment 1 in the arc direction. Depending on the type of attachment device, this groove 7 may be formed by welding an L-shaped member to the entire length of the inside of the segment 1. A stopper 9 is provided to ensure that the attachment device is rotated by the relay 10, and is protruded from the longitudinal end face of the segment 1, and the reel 10 is also provided with this stopper 9a. 11 is a blind cover for the guide hole 3.

This attachment device forcibly expands the segments 1 against the tension spring 6 when the saber 8 is inserted into the groove 7, so that the inner diameter becomes larger than the outer diameter when the reel 10 is contracted, and the reel 10 When attached to the reel 10 and enlarged, saber 8
A gap is created between the groove 7 and the saber 8.
The width of the saber 8 is set so that it can pass more easily. Therefore, if the saber 8 is inserted into the groove 7 and the reel 10 is contracted, it can be attached to and removed from the reel 10, and if the reel 10 is expanded, it can be fixed to the reel 10.

Conventionally, such an attachment device first manufactures the segments 1 individually, then uses a special jig to machine the guide holes 3 and fix the ribs 2, and then uses a high-grade machine tool such as a hollow milling machine. It is manufactured by using a method of grinding the inner and outer circumferential surfaces. In this way, it was manufactured
This is because the attachments constituting the reel 10 have conventionally been manufactured by manufacturing and processing the attachments individually due to the relationship with the internal wedge mechanism, and the attachment device could also be manufactured by following that method.

(Problems to be Solved by the Invention) However, when an attachment device is manufactured by such a method, the following problems occur.

(1) Since the attachment device is designed to match the existing reel 10, the dimensions of the segment 1 are different, and machining thereof requires special jigs with different dimensions. For this reason, depending on the dimensions ordered, there were cases where it was necessary to start preparing the jig. Furthermore, in order to manufacture the same segment 1, a high-grade machine tool such as a hollow milling machine must be used, resulting in high machining costs.

(2) It is extremely difficult to drill guide holes 3 in adjacent segments 1 in a state where the segments 1 are separated so that they are parallel to the diameter direction when assembled in a cylindrical shape, and that the positions are exactly opposite to each other. It was difficult. For this reason, when the segments 1 are assembled into a cylindrical shape by fitting the guide pin 5 into the guide hole 3, a step may occur between adjacent segments 1, or the guide pin 5 may be strained and break, or the guide pin 5 may break due to the guide hole. 3 was abnormally worn and had play, sometimes making it impossible to insert the saber 8 into the groove 7.

(3) Since the attachment device rotates at high speed together with the reel 10, it is necessary to balance the rotation by making the weight uniform in the lengthwise and circumferential directions. It was difficult to allocate the fixing positions so that the two parts were balanced.

(4) In order to prevent buckling inside the metal band coil when segment 1 expands or contracts, check the meshing of the latchings provided at both ends of segment 1 to match the latchings of the adjacent ones during assembly, and if inappropriate, It depended on how to fix it. As a result, investigations and corrections require man-hours and time, and delivery times are unavoidably extended.

(5) After welding ribs 2 and hooks 4 to segment 1, it is necessary to perform heat treatment to remove distortion, but in the case of a large attachment device with a length of 3 m, variations in heat treatment may occur depending on segment 1. , since distortion occurs in different locations for each segment 1, the same problem as (2) arises.

(Means for Solving the Problems) The present invention provides a method for manufacturing an attachment device for changing the reel diameter which solves the above-mentioned manufacturing problems, and uses a circular steel pipe as the material.
Most of the guide hole machining, surface machining, and heat treatment are performed in the steel tubular state, and if additional parts such as ribs need to be attached, most of the attachment is also done. It was divided into lengthwise sections, the end faces of the sections were processed and surface treated, and then assembled.

That is, the present invention uses a circular steel pipe, and after making a split in advance so that a portion remains at the planned lengthwise splitting position of the steel pipe, heat treatment is performed to remove the distortion caused by making the split. is removed, and then a guide hole is drilled and the inner and outer circumferential surfaces are ground. After that, the portion left by the dividing line is divided in the length direction.

The present invention will be explained in detail below.

First, you can use a commercially available steel pipe as long as its diameter matches the diameter of the attachment device you are trying to manufacture, but if the desired diameter is not available, you can use a casting method or use a cylindrical steel plate. Steel pipes are manufactured by processing the pipe into shapes and welding the butt parts. The steel pipe is split along most of its length, leaving a portion large enough to withstand the strength of machining at the planned splitting location, and then heat treated.
Here, the reason why a dividing line is inserted in advance is that if the entire image is divided at once without inserting the dividing line, the distortion will become large. In addition, heat treatment is performed after making the splits to remove the distortion caused by making the splits, and to align the segment 1 with the position and direction of the guide hole 3 drilled in the split steel pipe. This is to prevent errors from occurring even if the attachment device for changing the reel diameter is assembled into a cylindrical shape after being divided. Note that, if the combination of segment 1 is to be made into a racking, the division is made into a racking pattern. Furthermore, if it is necessary to attach the ribs 2, the attachment is performed before the heat treatment.

After the heat treatment, a guide hole 3 is drilled and the inner and outer circumferential surfaces are ground before dividing the remaining portion of the dividing line into segments 1. That is,
When the guide hole 3 is drilled in the steel tubular state, the guide hole 3 is drilled in the same state as when the segment 1 is assembled to the attachment device, so there is no error in the position or direction of the guide hole 3. , the accuracy is higher than when the guide hole 1 is drilled for each segment 1 after being divided. Further, the grinding of the inner and outer circumferential surfaces is carried out using a lathe, but if this is carried out on the steel tube, the entire process can be carried out continuously, resulting in good workability.

When the drilling of the guide hole 3 and the grinding of the inner and outer circumferential surfaces are completed, the remaining part of the dividing line is divided into segments 1 in the length direction. If a latching is to be formed on the divided end face, the division is performed in a latching shape.

Next, if it is divided into segments, grooves 7 are formed on the divided end face, which could not be done in the steel tubular state.
Drilling, hand finishing, shot, plating,
Surface finishing processing such as painting is performed, and finally it is assembled into a cylindrical shape using guide pins 5 and tension springs 6.

The present invention will be specifically explained below using Examples.

(Example) Figures 1 to 5 show the manufacturing process of an attachment device consisting of four segments 1. First, a steel pipe 12 is manufactured by rolling and welding a steel plate, and then the steel pipe 12 is manufactured as shown in Figure 1. The distortion was removed by heat treatment.

After the heat treatment, the circumference was equally divided into four positions, and rasping-like divisions 13 were made in each position in the length direction, excluding both ends and the center, as shown in FIG.

Next, the fixing positions of the ribs 2 were symmetrically assigned to the inside of the steel pipe 12, and the fixing positions of the stoppers 9 were symmetrically assigned to both end faces, and the ribs 2 and stoppers 9 were welded to each assigned position (Figure 3). . Here, heat treatment was performed again to remove distortions caused by the formation of the dividing lines 13 and the welding of the ribs 2 and stoppers 9.

After the reheat treatment, both end faces and the inner and outer circumferential surfaces are ground using a lathe, and then a guide hole 3 parallel to the diameter is made within the wall thickness at the planned dividing position (Fig. 4).
In addition, tapping holes 14 for embedding hooks 4 were drilled on both sides of the planned dividing position on the inside (Figure 5), and bolt holes (not shown) for threading hanging bolts for hanging crane wires were drilled on the outer periphery. .

Next, the connected part of the steel pipe 12 where the dividing line 13 is inserted is cut in the length direction to divide it into four segments 1, and grooves 7 are bored in both end faces of the segment 1 in the arc direction. did.

After drilling the groove 7, chrome plating is applied, a hook 4 is embedded in the tapping hole 14, a tension spring 6 is applied to the hook 4, and a guide pin 5 is inserted into the guide hole 3 to form the segment 1 into a cylindrical shape. Assembled.

(Effects) As described above, in the present invention, the steel pipe 12 is used as a material, and attachment and machining of accessory parts where dimensional accuracy is a problem is performed in the steel pipe-like state with divisions.
Since it is then divided into segment 1, the following effects are achieved.

(1) Since the guide hole 3 is drilled in a steel tubular state, no special jig is required.

(2) Since the end face and inner and outer circumferential surfaces of segment 1 are ground in the tubular state, it is possible to process them with a general lathe instead of using a high-grade machine tool such as a hollow milling machine. can.

(3) Since the guide hole 3 into which the guide pin 5 is inserted is bored in a steel tube shape, the direction can be made parallel to the diameter direction, and the positions will match even after dividing into the segments 1. Therefore, there will be no difference in level between adjacent segments 1, and no strain will be applied to the guide pin 5.

(4) The fixing positions of the rib 2, hook 4, and stopper 9 are allotted in the steel tubular state, so they do not shift and the rotation is balanced.

(5) Since the latching of adjacent segments 1 is formed at the same time during division, the meshing does not shift. Therefore, it is not necessary to investigate or correct the racking of adjacent segments 1, and the manufacturing process is shortened. In addition, since there is no need to modify the ribs 2, guide holes 3, and stopper 9, the manufacturing process is further shortened.

(6) Since heat treatment is applied to the steel tube, even if the attachment device is long and distortion occurs due to variations in heat treatment, adjacent segments 1
There is no problem because the same state of distortion occurs.

(7) Since the manufacturing process is simplified, manufacturing costs will be lower and delivery times will be significantly shorter than in the past.
Rotational balance also improves dimensional accuracy, so
A higher quality attachment device can be manufactured than conventional methods.

[Brief explanation of drawings]

Figures 1 to 5 show the manufacturing process of the attachment device for changing the reel diameter according to the present invention. Figure 1 is a perspective view of the steel pipe, and Figure 2 shows the dividing line at the planned dividing position, leaving a part of the pipe. Figure 3 is a perspective view of the steel pipe with ribs and stoppers fixed to it, Figure 4 is a partial side view showing the guide hole drilled, and Figure 5 is the hook hole drilled. It is a partial side view which shows a state. Figures 6 to 9 show a conventional attachment device for changing the reel diameter. Figure 6 is a front view with a saber inserted, Figure 7 is a longitudinal sectional view of the attachment device attached to a reel, and Figure 8 is a longitudinal sectional view of the attachment device for changing the reel diameter. Side view showing the installation state of the guide pin in cross section, No. 9
The figure is a cross-sectional view of the part to which the tension spring is attached. 1... Segment, 2... Rib, 3... Guide hole, 4
...Hook, 5...Guide pin, 6...Tension spring, 7...
Groove, 8... Saber, 9, 9a... Stopper, 10
...Reel, 11...Blind lid, 12...Steel pipe, 13...
Division, 14...tapping hole.

Claims (1)

[Claims] 1 Arrange a plurality of arc-shaped segments in a cylindrical shape, provide guide holes extending in the diameter direction of the cylinder at both ends of each segment in the arc direction, and provide hooks for hanging tension springs on the inside of both ends, When manufacturing an attachment device for changing the reel diameter in which each segment expands and contracts by fitting a guide pin into each guide hole of adjacent segments and applying a tension spring to each hook, a circular steel pipe is used. , After making a split in advance so that a part remains at the planned lengthwise split position of the steel pipe, heat treatment is performed to remove the distortion caused by making the split, and then a guide hole is drilled. and a method for manufacturing an attachment device for changing the diameter of a reel, which comprises grinding the inner and outer peripheral surfaces, and then dividing the remaining parts in the length direction.