JP5911409B2 - Roll mounting method for roll forming machine and guide mechanism for roll forming machine - Google Patents

Description

  The present invention relates to a roll attaching method for a roll forming machine, and a guide mechanism for a roll forming machine used in the roll attaching method.

  Conventionally, a product may be formed by performing roll forming on a steel sheet with a roll forming machine. In a roll forming machine that performs such roll forming, a plurality of roll units each composed of an upper roll and a lower roll are arranged along the flow direction of the steel sheet. In these roll units, a gap for sandwiching the steel plate is formed between the upper roll and the lower roll. And this gap is changing from the linear shape which is the cross-sectional shape of a flat plate to the shape which approaches the cross-sectional shape of a product, as it goes to a roll unit on the downstream side from the upstream roll unit. Thereby, the flat steel plate contained in the most upstream roll unit is gradually processed into a product shape as it is sandwiched by the downstream roll unit. And as for the steel plate which came out of the roll unit of the most downstream side, the cross-sectional shape turns into a cross-sectional shape of a product (for example, refer patent document 1).

Japanese Patent Laid-Open No. 2003-326312

FIG. 8 is a perspective view showing a roll unit and a roll stand of a conventional roll forming machine. FIG. 9 is a side view showing the roll unit and the roll stand.
The roll unit 21 of the roll forming machine includes the upper roll 22 and the lower roll 23 as described above. A gap 21 a is formed between the upper roll 22 and the lower roll 23 to sandwich the steel plate. Further, both ends of the upper roll 22 are attached with substantially rectangular parallelepiped chocks 22a and 22b that function as bearings disposed on the roll stands 25 and 26, and the rectangular parallelepiped chocks 23a are similarly attached to both ends of the lower roll 23. , 23b are attached. The chock 22a of the upper roll 22 and the chock 23a of the lower roll 23 are supported in the lateral direction by a pair of stand portions 25a and 25b of the roll stand 25 in front of FIG. ing. Similarly, the chock 22b of the upper roll 22 and the chock 23b of the lower roll 23 are supported in the lateral direction by a pair of stand portions 26a and 26b.

  Further, in order to adjust the gap 21a (clearance) between the upper roll 22 and the lower roll 23, the roll unit 21 is as if it is a fishing ceiling at the upper ends of the stand portions 25a and 25b and the stand portions 26a and 26b. Such a crown portion 27 and a bolt 28 are provided to constitute roll stands 25 and 26. In addition, the attachment structure of the crown part 27 and the bolt 28 to the stand parts 25a and 25b and the attachment structure of the crown part 27 and the bolt 28 to the stand parts 26a and 26b are the same structure. For this reason, below, the attachment structure of the crown part 27 and the volt | bolt 28 to the stand parts 25a and 25b is demonstrated.

  The crown portion 27 is provided at the upper end portions of the stand portions 25a and 25b so as to connect the upper end portion of the stand portion 25a and the upper end portion of the stand portion 25b, and is fixed by a fixing means (not shown). The crown portion 27 has two positioning pins 27a protruding from the lower surface. By inserting these positioning pins 27a into the positioning holes 29 formed in the upper ends of the stand portions 25a and 25b, the crown portion 27 is positioned with respect to the stand portions 25a and 25b. The crown portion 27 has a screw hole penetrating in the vertical direction. The bolt 28 is provided so as to penetrate the screw hole. The lower end portion of the bolt 28 is rotatably connected to the chock 22a of the upper roll 22. In other words, the gap 21 a between the upper roll 22 and the lower roll 23 can be adjusted by rotating the bolt 28 to lift or push down the upper roll 22.

  Here, when it is going to manufacture the product of a different cross-sectional shape with the same roll molding machine, it is necessary to replace | exchange each roll unit 21 with the thing corresponding to the product which manufactures the upper roll 22 and the lower roll 23. is there. In this case, the used upper roll 22 (and the crown portion 27 and the bolt 28 connected to the upper roll 22) are pulled out from between the stand portions 25a and 25b and between the stand portions 26a and 26b and used. The lower roll 23 that has been removed is extracted upward from between the stand portions 25a and 25b and between the stand portions 26a and 26b. Thereafter, the lower roll 23 of the product to be manufactured is inserted from above between the stand portions 25a and 25b and between the stand portions 26a and 26b, and connected to the upper roll 22 of the product to be manufactured (and to the upper roll 22). The crown part 27 and the bolt 28) thus inserted are inserted between the stand parts 25a and 25b and between the stand parts 26a and 26b from above.

  However, conventionally, the replacement work of the upper roll 22 and the lower roll 23 of the roll unit 21 has the following problems.

  The stand portions 25a and 25b and the stand portions 26a and 26b prevent the upper roll 22 and the lower roll 23 from moving laterally when a load is applied to the upper roll 22 and the lower roll 23 during roll forming. It is. For this reason, the clearance gap between the stand parts 25a and 25b, the chock 22a of the upper roll 22, and the chock 23a of the lower roll 23 is very narrow (for example, several tens of micrometers). Similarly, the gaps between the stand portions 26a and 26b and the chock 22b of the upper roll 22 and the chock 23b of the lower roll 23 are also very narrow (for example, several tens of μm). Therefore, in order to insert the chocks 23a and 23b of the lower roll 23 and the chocks 22a and 22b of the upper roll 22 between the stand portions 25a and 25b and between the stand portions 26a and 26b, the lower roll 23 and the upper roll 22 are inserted at the time of insertion. Need to be positioned accurately.

However, since the lower roll 23 and the upper roll 22 are very heavy, the chock 23a, 23b of the lower roll 23 and the chock 22a, 22b of the upper roll 22 are placed between the stand portions 25a, 25b and between the stand portions 26a, 26b. When inserting between them, it is necessary to work by lifting the lower roll 23 and the upper roll 22 with a crane or the like. For this reason, it is difficult to accurately position the lower roll 23 and the upper roll 22 during insertion. Therefore, if the lower roll 23 is tilted even a little, the chock 23a, 23b of the lower roll 23 hits one of the stand portions 25a, 25b, 26a, 26b and rotates, and the chock 23a, 23b of the lower roll 23 is rotated. Cannot be inserted between the stand portions 25a and 25b and between the stand portions 26a and 26b (see FIG. 10). This problem naturally occurs also in the upper roll 22.
That is, conventionally, it has been difficult to insert the chocks 23a and 23b of the lower roll 23 and the chocks 22a and 22b of the upper roll 22 between the stand portions 25a and 25b and between the stand portions 26a and 26b. It was.

  Further, when the chock 23a, 23b of the lower roll 23 and the chock 22a, 22b of the upper roll 22 are inserted between the stand portions 25a, 25b and between the stand portions 26a, 26b, the lower roll 23 and the upper roll 22 are accurately set. Since it is necessary to position, conventionally, the operator has pressed and positioned the lower roll 23 and the upper roll 22 lifted by a crane or the like. For this reason, conventionally, when inserting the chock 23a, 23b of the lower roll 23 and the chock 22a, 22b of the upper roll 22 between the stand portions 25a, 25b and between the stand portions 26a, 26b, the operator's hand is required to There also existed a subject that there was a possibility of being pinched between a chock and a stand part.

  Conventionally, when an insertion operation fails, the roll (lower roll 23 or upper roll 22) that has failed to be inserted must be once lifted with a crane, and then the insertion operation must be attempted again. For this reason, it takes a lot of man-hours to insert the chocks 23a, 23b of the lower roll 23 and the chocks 22a, 22b of the upper roll 22 between the stand portions 25a, 25b and between the stand portions 26a, 26b. There was also a problem of inefficiency.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a roll mounting method and roll for a roll forming machine capable of easily and safely inserting a chock of a lower roll and an upper roll between stand parts. It aims at obtaining the guide mechanism of a molding machine.

  In the roll attaching method of the roll forming machine according to the present invention, the upper roll and the lower roll chock are inserted between a pair of stand parts that support the chock attached to both ends of the upper roll and the lower roll in the lateral direction. A roll mounting method for a roll forming machine, wherein a set of guide portions having inclined surface portions on one side surface portion is attached to the upper end portion of each set of stands, and the inclined surface portions are made to face each other so that the interval becomes narrower from above to below. After the guide part positioning step for positioning one set of guide parts at the upper end of each set of stands, and after the guide part positioning step, the chock of the lower roll is guided to the inclined surface part of the guide part. After inserting the lower roll chock between the stands of the lower roll and the lower roll mounting process, the upper roll chock is guided to the inclined surface of the guide part. Te, and a roll mounting step on the insertion of chocks of the upper roll during the other pair of the stand portion from above, but with the.

For example, when each of the stand portions is a stand having a substantially square cross section, and a positioning hole is formed in each upper end portion of each of the stand portions, for example, an inclined surface portion is formed in each guide portion according to the present invention. A lower end portion provided on a main body portion having a substantially square cross section, a positioning pin that protrudes downward from the lower surface portion of the main body portion, and is inserted into a positioning hole of the stand portion, and a side surface portion that faces the main body portion. And a pair of guide plates projecting downward from the lower surface portion of the main body portion, and in the guide portion positioning step, the positioning pins of the guide portion are inserted into the positioning holes of the stand portion, and between the pair of guide plates of the guide portion. The upper end portion of the stand portion is inserted, and the guide portion is positioned at the upper end portion of the stand portion.
In this case, a guide handle fixing step of fixing the guide portion to the stand by the clamp handle may be performed between the guide portion positioning step and the lower roll attaching step using a clamp handle attached to the guide plate.

  Further, the guide mechanism of the roll forming machine according to the present invention supports both ends of the upper roll and the lower roll by a pair of roll stands, and the pair of roll stands supports the chock in the lateral direction. The stand portion is formed, and includes two sets of guide portions provided at the respective upper ends of the stand portion. Each of the guide portions includes a main body portion having an inclined surface portion formed on one side surface portion, and a stand portion. And a positioning mechanism for positioning the guide portion, and in a state where the pair of guide portions are attached to the upper ends of the pair of stand portions, the pair of guide portions are spaced from each other from above to below. Are provided at the upper end portion of the stand portion with their inclined surface portions facing each other so that the width of the stand portion is reduced.

For example, when the guide mechanism of the roll forming machine according to the present invention is provided in a stand part having a substantially square cross section and a positioning hole formed in the upper end part, for example, the lower part of the main body part of each guide part Formed in a substantially rectangular shape, the positioning mechanism of each guide part protrudes downward from the lower surface part of the main body part, and is provided on the positioning pin inserted into the positioning hole of the stand part and the side part facing the main body part. And a pair of guide plates that protrude downward from the lower surface portion of the main body portion and are arranged to face the side surface portion of the stand portion.
In this case, a clamp handle provided on the guide plate and fixing the guide portion to the stand may be provided.

  In the present invention, by providing a guide portion at the upper end portion of each stand portion, when inserting the chock attached to both ends of the lower roll between the pair of stand portions, the lower roll is placed on the inclined surface portion of the guide portion. You can guide the chock. Moreover, when inserting the chock provided in the both ends of the upper roll between a pair of stand parts, the chock of an upper roll can be guided to the inclined surface part of a guide part. For this reason, the chock provided in the both ends of the lower roll and the upper roll can be easily inserted between the pair of stand portions. At the time of this insertion work, it is not necessary for the operator to press the lower roll and the upper roll lifted by a crane or the like, so the chock provided at both ends of the lower roll and the upper roll can be safely placed between the pair of stand parts. It can also be inserted.

It is a lineblock diagram showing the forming line concerning an embodiment of the invention. It is a perspective view which shows the guide part of the guide mechanism which concerns on embodiment of this invention. It is a side view which shows the state which attached the guide part of the guide mechanism which concerns on embodiment of this invention to the stand part. It is explanatory drawing for demonstrating the exchange operation | work of the upper roller which concerns on embodiment of this invention, and a lower roller. It is explanatory drawing for demonstrating the exchange operation | work of the upper roller and lower roller which concern on embodiment of this invention following FIG. It is explanatory drawing for demonstrating the exchange operation | work of the upper roller and lower roller which concern on embodiment of this invention following FIG. It is the verification result which verified the improvement effect of the working efficiency of the exchange method of the lower roller which concerns on embodiment of this invention, and an upper roll. It is a perspective view which shows the roll unit of the conventional roll forming machine. It is a side view which shows the roll unit of the conventional roll forming machine. It is a side view for demonstrating the attachment method of the lower roll in the roll unit of the conventional roll forming machine.

Embodiment.
FIG. 1 is a configuration diagram showing a molding line according to an embodiment of the present invention.
The forming line 1 according to the present embodiment is a forming line for performing a roll forming process on the steel plate 80, and includes an uncoiler 10, a roll forming machine 20, a cutting machine 30, a stock conveyor 40, and a loading / conveying unit 60. ing. The uncoiler 10 supplies a flat steel plate 80 wound in a spiral shape to the downstream roll forming machine 20. The roll forming machine 20 rolls a flat steel plate 80 into a product shape. In the roll forming machine 20, a plurality of roll units 21 including an upper roll 22 and a lower roll 23 are arranged along the flow direction of the steel plate 80.

  These roll units 21 are the same as the conventional roll units shown in FIGS. That is, the roll unit 21 includes an upper roll 22 and a lower roll 23. A gap 21 a is formed between the upper roll 22 and the lower roll 23 to sandwich the steel plate. Further, substantially rectangular parallelepiped chocks 22 a and 22 b are provided at both ends of the upper roll 22, and rectangular solid chocks 23 a and 23 b are also provided at both ends of the lower roll 23. The chock 22a of the upper roll 22 and the chock 23a of the lower roll 23 are supported in the lateral direction by a pair of stand portions 25a and 25b. Similarly, the chock 22b of the upper roll 22 and the chock 23b of the lower roll 23 are supported laterally by a pair of stand portions 26a and 26b.

  Further, in the roll unit 21, in order to adjust a gap 21a (clearance) between the upper roll 22 and the lower roll 23, an upper portion of the stand portions 25a and 25b and the stand portions 26a and 26b are provided with a crown portion 27 and a bolt 28. Is provided. In addition, the attachment structure of the crown part 27 and the bolt 28 to the stand parts 25a and 25b and the attachment structure of the crown part 27 and the bolt 28 to the stand parts 26a and 26b are the same structure.

  The crown portion 27 is provided at the upper end portions of the stand portions 25a and 25b so as to connect the upper end portion of the stand portion 25a and the upper end portion of the stand portion 25b, and is fixed by a fixing means (not shown). The crown portion 27 has two positioning pins 27a protruding from the lower surface. By inserting these positioning pins 27a into the positioning holes 29 formed in the upper ends of the stand portions 25a and 25b, the crown portion 27 is positioned with respect to the stand portions 25a and 25b. The crown portion 27 has a screw hole penetrating in the vertical direction. The bolt 28 is provided so as to penetrate the screw hole. The lower end portion of the bolt 28 is rotatably connected to the chock 22a of the upper roll 22. In other words, the gap 21 a between the upper roll 22 and the lower roll 23 can be adjusted by rotating the bolt 28 to lift or push down the upper roll 22.

  The gap 21a of each roll unit 21 configured as described above approaches the cross-sectional shape of the product from the linear shape that is the cross-sectional shape of the flat plate as it goes from the upstream roll unit 21 to the downstream roll unit 21. The shape has changed. As a result, the flat steel plate 80 that has entered the most upstream roll unit 21 is gradually processed into a product shape as it is sandwiched by the downstream roll unit 21. And the steel plate 80 which came out of the roll unit 21 of the most downstream side becomes the cross-sectional shape of the product 81 which the cross-sectional shape mentions later.

  The cutting machine 30 is disposed on the downstream side of the roll forming machine 20. The steel plate 80 having the cross-sectional shape of the product 81 is cut into a predetermined length by the cutting machine 30, and the product 81 is completed. A stock conveyor 40 is provided on the downstream side of the cutting machine 30. The stock conveyor 40 is provided with a plurality of rollers 41 that rotate about the rotational axis along the short direction of the stock conveyor 40, and these rollers 41 are arranged at predetermined intervals in the longitudinal direction of the stock conveyor 40. Has been. For this reason, the product 81 sent out from the cutting machine 30 is carried into the stock conveyor 40 so that the longitudinal direction thereof is along the longitudinal direction of the stock conveyor 40. Then, the product 81 carried into the stock conveyor 40 is sent to the loading / conveying unit 60 provided on the downstream side of the stock conveyor 40. The loading / conveying unit 60, after loading a predetermined number of products 81, conveys these products 81 to a downstream process.

  Here, it is assumed that the molding line 1 according to this embodiment not only manufactures a product 81 having the same cross-sectional shape but also manufactures a plurality of products 81 having different cross-sectional shapes. Therefore, when the product 81 having a different cross-sectional shape is manufactured, in the molding line 1 according to the present embodiment, that is, in the roll molding machine 20 according to the present embodiment, the upper roll 22 and the lower roll are provided for each roll unit 21. The roll 23 is replaced with one corresponding to the product to be manufactured.

(Upper roll and lower roll replacement method)
The upper roll 22 and the lower roll 23 are exchanged as follows.
In the following, the guide mechanism 70 (two sets of guide portions 71 and 71) used for exchanging the upper roll 22 and the lower roll 23 will be first described prior to the description of the replacement method of the upper roll 22 and the lower roll 23. .

FIG. 2 is a perspective view showing a guide portion of the guide mechanism according to the embodiment of the present invention. FIG. 3 is a side view showing a state in which the guide portion is attached to the stand portion.
The guide mechanism 70 includes two sets of guide portions 71 and 71 (a set of guide portions 71 and 71 provided on the pair of stand portions 25a and 25b, and a set of guide portions 71 provided on the pair of stand portions 26a and 26b, 71). As shown in FIG. 2, these guide portions 71 are composed of a main body portion 72, a positioning mechanism 75, and a clamp handle 78.

  The main body 72 is placed on the upper ends of the stands 25a, 25b, 26a, 26b. The cross-sectional shape of the lower portion of the main body 72 (more specifically, the cross-sectional shape in the horizontal plane) is substantially rectangular, as is the cross-sectional shape of the stand portions 25a, 25b, 26a, 26b (more specifically, the cross-sectional shape in the horizontal plane). (For example, a square shape). In addition, an inclined surface portion 73 is formed on one side surface portion of the main body portion 72.

  A positioning mechanism 75 is attached to the main body 72. The positioning mechanism 75 positions the position and angle of the main body 72 in the front-rear and left-right directions with respect to the stand portions 25a, 25b, 26a, and 26b. In the present embodiment, the positioning mechanism 75 is configured by the positioning pins 76 and the two guide plates 77. The positioning pin 76 is inserted into a hole 72 a formed in the lower surface portion of the main body 72. When the positioning pin 76 is inserted into the main body 72 (attached state), the lower portion of the positioning pin 76 protrudes from the lower surface of the main body 72. The two guide plates 77 are attached to the opposing side surface portions (more specifically, the side surface portions where the inclined surface portion 73 is not formed) of the main body portion 72 by, for example, screwing. In a state where these guide plates 77 are attached to the main body portion 72, the lower portion of the guide plate 77 protrudes from the lower surface portion of the main body portion 72. In addition, a screw hole 77 a into which the male screw portion 78 a of the clamp handle 78 is screwed is formed in a lower portion of the guide plate 77 (a portion protruding from the lower surface portion of the main body portion 72).

  The clamp handle 78 is for fixing the guide part 71 to the stand parts 25a, 25b, 26a, 26b. The clamp handle 78 has a male screw portion 78 a screwed into a screw hole 77 a of the guide plate 77. The guide plate 77 to which the clamp handle 78 is attached may be either guide plate 77. When the guide portion 71 is fixed to the stand portions 25a, 25b, 26a, and 26b, the clamp handle 78 may be attached to the guide plate 77 on the side where the clamp handle 78 is easy to turn.

  The guide portion 71 configured as described above inserts the positioning pin 76 into the positioning hole 29 formed in the upper end portion of the stand portions 25 a, 25 b, 26 a, and 26 b and inserts the stand portion 25 a between the two guide plates 77. 25b, 26a, 26b are inserted, and the main body 72 is placed on the upper ends of the stand portions 25a, 25b, 26a, 26b. By inserting the positioning pins 76 into the positioning holes 29 formed at the upper ends of the stand portions 25a, 25b, 26a, and 26b, the stand portions 25a, 25b, 26a, and 26b are moved in the front-rear and left-right directions of the main body portion 72. The position can be determined. Further, by inserting the upper ends of the stand portions 25a, 25b, 26a, and 26b between the two guide plates 77, the angle of the main body portion 72 is positioned with respect to the stand portions 25a, 25b, 26a, and 26b. be able to.

  In addition, the pair of guide portions 71 and 71 attached to the pair of stand portions 25a and 25b face each other so that the interval between the inclined surface portions 73 becomes narrower from the upper side to the lower side. Be placed. Similarly, the pair of guide portions 71 and 71 attached to the pair of stand portions 26a and 26b also face each other so that the interval between the inclined surface portions 73 becomes narrower from the upper side to the lower side. Arranged.

The inclined surface portion 73 guides the chocks 22a, 22b, 23a, and 23b between the stand portions 25a and 25b and between the stand portions 26a and 26b as described later. For this reason, in the present embodiment, as shown in FIG. 3, the gradient of the inclined surface portion 73, that is, the ratio of the height H to the width W of the inclined surface portion 73 is set to H: W = 1: 0.2. If the slope of the inclined surface portion 73 becomes too loose, that is, if the ratio of the width W to the height H of the inclined surface portion becomes too large, the chocks 22a, 22b, 23a, 23b are likely to be caught by the inclined surface portion 73, and the chocks This is because it is difficult to insert 22a, 22b, 23a, 23b between the stand portions 25a, 25b and between the stand portions 26a, 26b. Further, if the slope of the inclined surface portion 73 becomes too steep, that is, if the ratio of the width W to the height H of the inclined surface portion becomes too small, the gap between the inclined surface portions 73 arranged to face each other becomes small, and the chocks are reduced. This is because it becomes difficult to insert 22a, 22b, 23a, and 23b between the inclined surface portions 73 (that is, the induction effect of the chocks 22a, 22b, 23a, and 23b is reduced).
In the present embodiment, the member of the inclined surface portion 73 is not particularly mentioned, but the inclined surface portion 73 may be formed of a member having an excellent wear resistance effect, for example. Examples of the member having an excellent wear resistance effect include brass (brass), bronze (gunmetal), wear-resistant steel (manganese steel, chrome molybdenum steel, etc.), and ductile cast iron. In the case of steel and cast iron, these are heat-treated and their surfaces are polished. For example, the inclined surface portion 73 may be formed of a slippery material (having a small friction coefficient) such as an aluminum material. At this time, the entire main body 72 may be formed of a material excellent in wear resistance and / or a slippery material. Of course, the main body portion 72 may be divided into the inclined surface portion 73 and the other portions, and only the inclined surface portion 73 may be formed of a material excellent in wear resistance and / or a slippery material.

  In the present embodiment, using the guide mechanism 70 configured as described above, the upper roll 22 and the lower roll 23 are exchanged as follows.

  4-6 is explanatory drawing for demonstrating the replacement | exchange operation | work of the upper roller which concerns on embodiment of this invention, and a lower roller.

  As shown in FIG. 4A, from the roll unit 21 to which the used upper roll 22 and the lower roll 23 are attached, the upper roll 22 (and the crown portion 27 and the bolt 28 connected to the upper roll 22) and the lower roll The roll 23 is extracted (FIG. 4B). Thereafter, as shown in FIG. 4C, a guide portion 71 is attached to the upper end portions of the stand portions 25a, 25b, 26a, and 26b (guide portion positioning step). Then, the clamp handle 78 is turned to fix both (guide portion fixing step).

  After the step of FIG. 4C, a lower roll attaching step shown in FIGS. 5D and 5E is performed. Specifically, as shown in FIG. 5D, the lower roll 23 to be used is lifted by a crane or the like, and the chocks 23a and 23b are inserted from above between the stand portions 25a and 25b and between the stand portions 26a and 26b. Then, the lower roll 23 is lowered. At this time, the chock 23a is guided to the inclined surface portion 73 of the guide portion 71 attached to the stand portions 25a and 25b, and the chock 23b is guided to the inclined surface portion 73 of the guide portion 71 attached to the stand portions 26a and 26b. Therefore, as shown in FIG. 5 (e), even if the lower roll 23 is tilted, the chock 23a follows the inclined surface portion 73 of the guide portion 71 attached to the stand portions 25a and 25b, and the stand portions 25a and 25b. The chock 23b is easily inserted between the stand portions 26a and 26b following the inclined surface portion 73 of the guide portion 71 attached to the stand portions 26a and 26b. At this time, it is not particularly necessary for the operator to manually hold down the lower roll 23 lifted by a crane or the like. Further, by applying oil to the inclined surface portion 73 of the guide portion 71, the chocks 23a and 23b can be inserted more easily.

  When the lower roll attaching step is completed, the upper roll attaching step shown in FIGS. 5 (f) to 6 (i) is performed.

  Specifically, as shown in FIG. 5 (f), the upper roll 22 to be used is lifted by a crane or the like, and the chocks 22a and 22b are inserted from above between the stand portions 25a and 25b and between the stand portions 26a and 26b. Then, the upper roll 22 is lowered. At this time, the chock 22a is guided to the inclined surface portion 73 of the guide portion 71 attached to the stand portions 25a and 25b, and the chock 22b is guided to the inclined surface portion 73 of the guide portion 71 attached to the stand portions 26a and 26b. Therefore, as shown in FIG. 6 (g), even if the upper roll 22 is inclined, the chock 22a follows the inclined surface portion 73 of the guide portion 71 attached to the stand portions 25a and 25b, and the stand portions 25a and 25b. The chock 22b is easily inserted between the stand portions 26a and 26b following the inclined surface portion 73 of the guide portion 71 attached to the stand portions 26a and 26b. At this time, it is not particularly necessary for the operator to manually hold the upper roll 22 lifted by a crane or the like. Further, by applying oil to the inclined surface portion 73 of the guide portion 71, the chocks 22a and 22b can be inserted more easily.

  Here, a bolt 28 and a crown portion 27 are connected to the upper roll 22. For this reason, as shown in FIG. 6G, after the chocks 22a and 22b are inserted between the stand portions 25a and 25b and between the stand portions 26a and 26b, before the crown portion 27 interferes with the guide portion 71. Then, the lowering of the upper roll 22 is temporarily stopped. And as shown in FIG.6 (h), the guide part 71 is removed from the upper end part of stand part 25a, 25b, 26a, 26b. Thereafter, as shown in FIG. 6 (i), the lowering of the upper roll 22 is resumed, and the upper roll 22 is lowered until the crown portion 27 is placed on the upper ends of the stand portions 25a, 25b, 26a, and 26b. . Finally, the crown portion 27 is fixed to the upper ends of the stand portions 25a, 25b, 26a, and 26b by fixing means (not shown), and the replacement work of the lower roll 23 and the upper roll 22 is completed.

(inspection result)
FIG. 7 is a verification result of verifying the effect of improving the work efficiency of the lower roller and upper roll replacement method according to the embodiment of the present invention.
As a result of the verification, the roll molding machine 20 in which the 31-stage roll unit 21 is arranged along the flow direction of the steel plate 80, the working time of the conventional method for replacing the lower roll 23 and the upper roll 22, and the present embodiment The exchange method of the lower roll 23 and the upper roll 22 which concerns on this is compared.
As shown in FIG. 7, in the conventional method for replacing the lower roll 23 and the upper roll 22, it took 8 minutes to replace the lower roll 23 and the upper roll 22 of one roll unit 21. On the other hand, in the replacement method of the lower roll 23 and the upper roll 22 according to the present embodiment, the lower roll 23 and the upper roll 22 of one roll unit 21 could be replaced in 6 minutes. That is, by using the method for replacing the lower roll 23 and the upper roll 22 according to the present embodiment, the work efficiency of the lower roll 23 and the upper roll 22 in the roll unit 21 can be improved by 25%. This is an improvement in work efficiency of about 1 hour in the case of the roll forming machine 20 in which the 31-stage roll unit 21 is arranged.

  As described above, in the present embodiment, the guide portions 71 are provided at the upper ends of the stand portions 25a, 25b, 26a, and 26b, so that the chocks 23a and 23b of the lower roll 23 are placed between the stand portions 25a and 25b and the stand portion 26a. , 26b, the chock 23a, 23b of the lower roll 23 can be guided to the inclined surface portion 73 of the guide portion 71. Further, when the chock 22a, 22b of the upper roll 22 is inserted between the stands 25a, 25b and between the stand parts 26a, 26b, the chock 22a, 22b of the upper roll 22 is guided to the inclined surface part 73 of the guide part 71. Can do. For this reason, the chock 23a, 23b of the lower roll 23 and the chock 22a, 22b of the upper roll 22 can be easily inserted between the stand portions 25a, 25b and between the stand portions 26a, 26b. Further, since it is not necessary for the operator to hold down the lower roll 23 and the upper roll 22 lifted by a crane or the like during this insertion operation, the chock 23a, 23b of the lower roll 23 and the chock 22a, 22b of the upper roll 22 are It can also be safely inserted between the portions 25a and 25b and between the stand portions 26a and 26b.

  In the present embodiment, the guide portion 71 is fixed to the stand portions 25a, 25b, 26a, and 26b by the clamp handle 78. However, the chocks 23a and 23b of the lower roll 23 and the upper rolls 22 on the inclined surface portion 73 of the guide portion 71. If the guide portion 71 does not tilt when the chocks 22a and 22b interfere with each other, it is not particularly necessary to provide the clamp handle 78.

  1 Forming Line, 10 Uncoiler, 20 Roll Forming Machine, 21 Roll Unit, 21a Clearance, 22 Upper Roll, 22a, 22b Chock, 23 Lower Roll, 23a, 23b Chock, 25, 26 Roll Stand, 25a, 25b Stand Part, 26a 26b Stand part 27 Crown part 27a Positioning pin 28 Bolt 29 Positioning hole 30 Cutting machine 40 Stock conveyor 41 Roller 60 Loading / conveying unit 70 Guide mechanism 71 Guide part 72 Body part 72a hole part, 73 inclined surface part, 75 positioning mechanism, 76 positioning pin, 77 guide plate, 77a screw hole, 78 clamp handle, 78a male thread part, 80 steel plate, 81 products.

Claims (6)

Of the pair of roll stands that horizontally support the chock provided at both ends of the upper roll and the lower roll, the upper roll and the lower roll are disposed between a pair of stand portions formed on each roll stand. A roll mounting method of a roll forming machine for inserting a chock of
A set of guide portions each having an inclined surface portion on one side surface portion is attached to the upper end portion of each set of the stand portions, and the inclined surface portions are opposed so as to be narrowed from the upper side to the lower side. A guide portion positioning step for positioning the upper end portion of each set of the stand portions;
After the guide portion positioning step, the lower roll attaching step of guiding the chock of the lower roll to the inclined surface portion of the guide portion and inserting the chock of the lower roll between the pair of stand portions from above,
After the lower roll attaching step, the upper roll attaching step of guiding the upper roll chock to the inclined surface portion of the guide portion and inserting the upper roll chock between the pair of stand portions from above,
A roll mounting method for a roll forming machine. Each of the stand portions is a stand portion having a substantially rectangular cross section,
A positioning hole is formed in each upper end portion of the stand portion,
Each said guide part is
The inclined surface portion is formed, and the lower portion is formed in a substantially quadrangular cross section.
A positioning pin that projects downward from the lower surface of the main body and is inserted into the positioning hole of the stand;
A pair of guide plates provided on opposite side surfaces of the main body and having a lower end projecting downward from a lower surface of the main body;
With
In the guide part positioning step,
The positioning pin of the guide part is inserted into the positioning hole of the stand part, the upper end part of the stand part is inserted between the pair of guide plates of the guide part, and the guide part is inserted into the upper end part of the stand part. The roll mounting method for a roll forming machine according to claim 1, wherein positioning is performed on the roll forming machine. The guide portion includes a clamp handle attached to the guide plate,
3. The roll forming machine according to claim 2, further comprising a guide portion fixing step of fixing the guide portion to the stand portion by the clamp handle between the guide portion positioning step and the lower roll attaching step. Roll installation method. Two sets of guide portions provided at the upper ends of the two sets of stand portions that support the chock provided at both ends of the upper roll and the lower roll in the lateral direction,
Each of the guide portions is
A main body having an inclined surface formed on one side surface;
A positioning mechanism for positioning the stand portion and the guide portion;
Have
In a state where a set of the guide portions is attached to the upper ends of the pair of stand portions,
A guide mechanism for a roll forming machine, wherein the pair of guide portions are provided at an upper end portion of the stand portion with their inclined surfaces facing each other so that the interval is narrowed from above to below. The guide mechanism is provided in the stand part having a substantially square cross section and a positioning hole formed in the upper end part.
Each of the guide portions is formed such that a lower portion of the main body portion has a substantially square cross section,
The positioning mechanism of each guide part is:
A positioning pin that protrudes downward from the lower surface of the main body and is inserted into the positioning hole of the stand;
A pair of guide plates provided on opposite side surfaces of the main body, the lower end projecting downward from the lower surface of the main body, and disposed opposite to the side of the stand;
The guide mechanism of the roll forming machine according to claim 4, comprising:   The guide mechanism of the roll forming machine according to claim 5, further comprising a clamp handle provided on the guide plate and fixing the guide portion to the stand portion.

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