Slot paper forming device

Abstract

To provide a slot paper forming device capable of improving meandering correction while ensuring formability for each line.SOLUTION: A slot paper forming device includes: a first line-forming roller 102 that has four convex shapes that extend around a cylindrical surface in a direction of rotation; and a second line-forming roller 103 that has four concave shapes placed at positions corresponding to the convex shapes of the first line-forming roller on the cylindrical surface. In the first line-forming roller 102, the protrusions of the line convex portion 205 on both ends of the four convex portions are lower than the other protrusions of the line-forming protrusions 204, or the radius of curvature of the base 303 of the line recess on both ends is larger than the radius of curvature of the base 304 of the other groove recesses.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a slotted paper forming device, for example, a slotted paper forming device for inserting into a slot of a stator core. [Background technology]

[0002] Patent document 1 describes a slot paper forming device that is inserted into a slot in a stator core, and that includes a roller having a pressing portion that includes a convex portion at its end that protrudes toward one side of the base paper and presses one side of the base paper, and a mold that has a concave portion with a shape corresponding to the convex portion and presses the other side of the base paper, the mold being formed to protrude further in the axial direction of the roller than the pressing portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-93837 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there was a problem that the resistance of the protrusions and misalignment would cause a force that would prevent the slot paper from being transported straight, making the position of the creasing unstable. [Means for solving the problem]

[0005] In one embodiment of the slot paper forming device, the groove roller has four protrusions, of which the protrusions on both ends are higher than the protrusions on the other groove protrusions, or the radius of curvature of the protrusions on both ends is larger than the radius of curvature of the other groove protrusions. [Effects of the Invention]

[0006] According to the slotted paper forming device of the present disclosure, it is possible to improve meandering correction while ensuring formability for each crease. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view showing an example of a slotted paper forming device according to a first embodiment. [Figure 2] 1A and 1B are a perspective view and a development view of a slotted paper according to a first embodiment; [Figure 3] 3 is a cross-sectional view showing an example of a groove roller of the slotted paper forming device according to the first embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] Embodiment 1 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view showing an example of a slotted paper forming device according to embodiment 1. The slotted paper forming device 100 includes a meandering correction device 101, a first creasing roller 102, and a second creasing roller 103.

[0009] The center pivot type meandering correction device 101 corrects meandering in the Y-axis direction in FIG. 1 by the tilting motion of two guide rolls 111 and 112.

[0010] The first scoring roller 102 has four convex shapes that go around the circumference in the direction of rotation on its cylindrical surface. The second scoring roller 103 has four concave shapes at positions that correspond to the convex shapes of the first scoring roller 102. The base paper 104 fed between the first scoring roller 102 and the second scoring roller 103 is scored while being fed in the feed direction. The first scoring roller 102 and the second scoring roller 103 will be described in detail later.

[0011] Figure 2 is a perspective view and a development view of slotted paper according to embodiment 1. As shown in Figure 2(a), slotted paper 200 has a back portion 201, two side portions 202, 202, and two tip portions 203, 203. Note that, in the slotted paper 2 according to this embodiment, each of the side portions 202, 202 and tip portions 203, 203, excluding the back portion 201, is formed in pairs, and therefore will hereinafter be simply referred to by a single reference symbol, such as side portion 202.

[0012] The rear surface portion 201 is formed in a rectangular shape having long and short sides. The side surface portions 202 extend from both opposing long sides of the rear surface portion 201 so as to be approximately perpendicular to the rear surface portion 201. As an example, the side surface portion 202 has a rectangular shape. The tip portions 203 extend from the sides of the side surface portion 202 opposite to the sides (long sides of the rear surface portion 201) that connect to the rear surface portion 201 in directions that form obtuse angles with the side surface portion 202, thereby forming an opening. In other words, the tip portions 203 are bent from the rear surface portion 201 side toward the opening side so as to gradually approach each other while being spaced apart from each other.

[0013] As shown in FIG. 2, the slotted paper 2 is formed so that both sides of the back surface 201 are symmetrical.

[0014] 2(b), an inner crease 204 is formed on the edge where the back portion 201 and the side portion 202 are bent. An outer crease 205 is formed on the edge where the side portion 202 and the tip portion 203 are bent.

[0015] Fig. 3 is a cross-sectional view showing an example of a score roller of the slotted paper forming device according to the first embodiment. Fig. 3 is a YZ cross-sectional view of Fig. 1. In Fig. 3, score roller 30 is a conventional one. Also, score roller 300 is one of the present disclosure.

[0016] As shown in Figure 3, in a conventional creasing roller 30, all of the protrusions 31 are the same height. The base 32 of the slotted paper has the same shape for all of the protrusions, and therefore has the same degree of resistance. Therefore, when performing meandering correction using the center pivot method in the slotted paper forming and insertion process, the resistance caused by the protrusion shape of the creasing roller becomes an obstacle to meandering correction.

[0017] Therefore, in the slotted paper forming device of the present disclosure, the protrusion shapes are changed at two inner and two outer locations of the creasing roller. The outer protrusions reduce resistance to weaken the forming. Specifically, the height 301 of the outer protrusions 205 is made lower than the height 302 of the inner protrusions 204. Alternatively, the radius of curvature of the base 303 of the concave roller corresponding to the outer protrusions 205 is made larger than the radius of curvature of the base 304 of the concave roller corresponding to the inner protrusions 204.

[0018] In this way, according to the slotted paper forming device of the first embodiment, the resistance of the streaky protrusions on both ends is reduced, making it easier to align the paper during meandering control and the like.

[0019] The present invention is not limited to the above-described embodiment, and modifications can be made as appropriate without departing from the spirit of the present invention. For example, the number of creases and convex shapes may be changed to match the shape of the slotted paper. In this case, the protrusions of the crease convex portions at both ends may be lower than the protrusions of the other crease convex portions, or the radius of curvature of the protrusions of the crease convex portions at both ends may be larger than the radius of curvature of the other crease convex portions.

[0020] Furthermore, the convex shape that runs around the cylindrical surface of the first creasing roller 102 in the rotational direction may be either intermittent or continuous in the rotational direction. Either shape is applicable as long as it matches the creasing to be formed. The same applies to the concave shape provided on the second creasing roller 103 at a position corresponding to the convex shape of the first creasing roller 102. [Explanation of symbols]

[0021] 100 Slot Paper Forming Machine 101 Meandering correction device 102 First groove roller 103 Second groove roller 104 Base paper 111, 112 Guide roll

Claims

[Claim 1] a first grooved roller having four convex shapes extending around the surface of a cylindrical shape in the direction of rotation; a second creasing roller having a cylindrical surface with four concave shapes at positions corresponding to the convex shapes of the first creasing roller; The first creasing roller has four convex portions, of which the protrusions of the creasing convex portions at both ends are lower than the protrusions of the other creasing convex portions, or the radius of curvature of the base of the creasing concave portions at both ends is larger than the radius of curvature of the base of the other creasing concave portions.

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