CN214423769U

CN214423769U - Arc edge transition upright post

Info

Publication number: CN214423769U
Application number: CN202120286549.7U
Authority: CN
Inventors: 周才良; 雷文
Original assignee: Zhejiang Guansen New Material Co ltd
Current assignee: Zhejiang Guansen New Material Co ltd
Priority date: 2021-01-23
Filing date: 2021-01-23
Publication date: 2021-10-19
Anticipated expiration: 2031-01-23

Abstract

The utility model discloses what arc limit transition stand related to is a stand, is applicable to and uses when moulding wooden product in occasions installation such as garden nursery, municipal park, house courtyard. The arc edge transition upright post is composed of first to seventeenth transverse plates, first to eighteenth vertical plates and first to fourth arc plates. The arc-edge transition upright post has reasonable design, simple and novel structure and convenient production and manufacture, can realize the production, processing and manufacture of the utility model by using the traditional profile extrusion process flow only by selecting a proper port die, has high degree of mechanization in the production process, less required labor force and low production cost; the arc edge transition upright post has strong integrity, the arc plate transition design ensures the safety and the aesthetic property in the use process, the weight is light, the stability is good, the transportation and the installation are both very convenient, the installation adaptability to the plastic-wood products is strong, and the installation of various modes of the plastic-wood products can be realized.

Description

Arc edge transition upright post

Technical Field

The utility model discloses what arc limit transition stand related to is a stand, is applicable to and uses when moulding wooden product in occasions installation such as garden nursery, municipal park, house courtyard.

Background

In recent years, with the enhancement of the environmental protection consciousness of people, the environment-friendly, degradable and recyclable plastic-wood material is more and more emphasized by people, and the application fields of the plastic-wood material relate to the fields of car interior decoration base materials, building decoration materials, outdoor tables and chairs, stools, picnic tables, packaging materials, furniture, municipal administration and the like used in occasions such as parks, courts, streets and the like. Wood-plastic materials have many advantages, such as: the material is homogeneous, has stable size compared with wood, is not easy to generate cracks, and cannot absorb moisture and deform; the thermoplastic plastic has the processability, can be formed by extrusion, die pressing, injection molding and other processes, and has small equipment abrasion; secondary processability with wood: can be sawed, planed and bonded or fixed by nails and bolts; toxic chemical substances are not needed for treatment, and formaldehyde is not contained; moth-eating resistance, aging resistance and corrosion resistance; wood appearance, higher hardness than plastic products, and the like.

However, when a pavilion, a walking corridor, a fence or a grating is built in occasions such as garden nurseries, municipal parks, family courtyards and the like for plastic-wood product installation, the upright posts are often needed. The traditional upright post is generally vertical corners, has single shape and insufficient aesthetic property, and is likely to cause injury particularly when a pedestrian carelessly impacts the vertical corners. Therefore, the invention of the arc edge transition upright post with a novel structure is very necessary.

Disclosure of Invention

The utility model provides an arc limit transition stand to above-mentioned purpose, this stand have the traditional stand have fixed, support other part or effect such as exclusive use outside, more have molding unique, corner rounding off, factor of safety is high, characteristics such as aesthetic property is strong.

The arc edge transition upright post is realized by adopting the following scheme:

the arc edge transition stand column comprises a first transverse plate, a second transverse plate, a third transverse plate, a fourth transverse plate, a fifth transverse plate, a sixth transverse plate, a seventh transverse plate, an eighth transverse plate, a ninth transverse plate, a tenth transverse plate, an eleventh transverse plate, a twelfth transverse plate, a thirteenth transverse plate, a fourteenth transverse plate, a fifteenth transverse plate, a sixteenth transverse plate, a seventeenth transverse plate, a first vertical plate, a second vertical plate, a third vertical plate, a fourth vertical plate, a fifth vertical plate, a sixth vertical plate, a seventh vertical plate, an eighth vertical plate, a ninth vertical plate, a tenth vertical plate, an eleventh vertical plate, a twelfth vertical plate, a thirteenth vertical plate, a fourteenth vertical plate, a fifteenth vertical plate, a sixteenth vertical plate, a seventeenth vertical plate, an eighteenth vertical plate, a first arc plate, a second arc plate, a third arc plate and a fourth arc plate; the left end of the first transverse plate is connected with the upper right end of the first arc plate to form an integral structure, and the right end of the first transverse plate is connected with the upper left end of the second arc plate to form an integral structure; the left end of the second transverse plate is vertically connected with the upper end of the second vertical plate to form an integral structure, and the right end of the second transverse plate is vertically connected with the upper end of the fourth vertical plate to form an integral structure; the left end of the third transverse plate is vertically connected with the upper end of the twelfth vertical plate to form an integral structure, and the right end of the third transverse plate is vertically connected with the upper end of the fourteenth vertical plate to form an integral structure; the left lower end of the first arc plate is connected with the upper end of the first vertical plate to form an integral structure; the left end of the fourth transverse plate is vertically connected with the lower end of the first vertical plate to form an integral structure, and the right end of the fourth transverse plate is vertically connected with the lower end of the second vertical plate to form an integral structure; the fifth transverse plate is sequentially connected with the seventh vertical plate and the ninth vertical plate to form a vertical cross structure, the left end of the fifth transverse plate is vertically connected with the lower end of the fourth vertical plate to form an integral structure, and the right end of the fifth transverse plate is vertically connected with the lower end of the twelfth vertical plate to form an integral structure; the left end of the sixth transverse plate is vertically connected with the lower end of the fourteenth vertical plate to form an integral structure, and the right end of the sixth transverse plate is vertically connected with the lower end of the sixteenth vertical plate to form an integral structure; the right lower end of the second arc plate is connected with the upper end of the sixteenth vertical plate to form an integral structure; the left end of the seventh transverse plate is vertically connected with the upper end of the eighteenth vertical plate to form an integral structure, and the right end of the seventh transverse plate is vertically connected with the upper end of the third vertical plate to form an integral structure; the lower end of the eighteenth vertical plate is connected with the upper left end of the third arc plate to form an integral structure; the eighth transverse plate is sequentially connected with the seventh vertical plate and the ninth vertical plate to form a vertical cross structure, the left end of the eighth transverse plate is vertically connected with the upper end of the fifth vertical plate to form an integral structure, and the right end of the eighth transverse plate is vertically connected with the upper end of the thirteenth vertical plate to form an integral structure; the left end of the ninth transverse plate is vertically connected with the upper end of the fifteenth vertical plate to form an integral structure, and the right end of the ninth transverse plate is vertically connected with the upper end of the seventeenth vertical plate to form an integral structure; the lower end of the seventeenth vertical plate is connected with the upper right end of the fourth arc plate to form an integral structure; the left end of the tenth transverse plate is vertically connected with the lower end of the third vertical plate to form an integral structure, and the right end of the tenth transverse plate is vertically connected with the lower end of the fifth vertical plate to form an integral structure; the left end of the eleventh transverse plate is vertically connected with the lower end of the thirteenth vertical plate to form an integral structure, and the right end of the eleventh transverse plate is vertically connected with the lower end of the fifteenth vertical plate to form an integral structure; the left end of the twelfth transverse plate is vertically connected with the upper end of the sixth vertical plate to form an integral structure, and the right end of the twelfth transverse plate is vertically connected with the lower end of the seventh vertical plate to form an integral structure; the left end of the thirteenth transverse plate is vertically connected with the lower end of the ninth vertical plate to form an integral structure, and the right end of the thirteenth transverse plate is vertically connected with the upper end of the tenth vertical plate to form an integral structure; the left end of the fourteenth transverse plate is vertically connected with the lower end of the sixth vertical plate to form an integral structure, and the right end of the fourteenth transverse plate is vertically connected with the upper end of the eighth vertical plate to form an integral structure; the left end of the fifteenth transverse plate is vertically connected with the upper end of the eleventh vertical plate to form an integral structure, and the right end of the fifteenth transverse plate is vertically connected with the lower end of the tenth vertical plate to form an integral structure; the left end of the sixteenth transverse plate is connected with the right lower end of the third arc plate to form an integral structure, and the right end of the sixteenth transverse plate is vertically connected with the lower end of the eighth vertical plate to form an integral structure; the left end of the seventeenth transverse plate is vertically connected with the lower end of the eleventh vertical plate to form an integral structure, and the right end of the seventeenth transverse plate is connected with the left lower end of the fourth arc plate to form an integral structure; a left upper opening rectangular groove and a left lower opening rectangular groove are formed among the second transverse plate, the fourth transverse plate, the fifth transverse plate, the second vertical plate and the fourth vertical plate; a rectangular groove with a left lower opening and an upper opening is formed among the seventh transverse plate, the eighth transverse plate, the tenth transverse plate, the third vertical plate and the fifth vertical plate; a left-lower-right opening rectangular groove is formed among the twelfth transverse plate, the fourteenth transverse plate, the sixth vertical plate, the seventh vertical plate and the eighth vertical plate; a right upper and lower opening rectangular groove is formed among the third transverse plate, the fifth transverse plate, the sixth transverse plate, the twelfth vertical plate and the fourteenth vertical plate; a right-lower-upper-opening rectangular groove is formed among the eighth transverse plate, the ninth transverse plate, the eleventh transverse plate, the thirteenth vertical plate and the fifteenth vertical plate; and right, lower and left open rectangular grooves are formed among the thirteenth transverse plate, the fifteenth transverse plate, the ninth vertical plate, the tenth vertical plate and the eleventh vertical plate.

The arc-edge transition upright post has reasonable design, simple and novel structure and convenient production and manufacture, can realize the production, processing and manufacture of the utility model by using the traditional profile extrusion process flow only by selecting a proper port die, has high degree of mechanization in the production process, less required labor force and low production cost; the arc edge transition upright post has strong integrity, the arc plate transition design ensures the safety and the aesthetic property in the use process, the weight is light, the stability is good, the transportation and the installation are both very convenient, the installation adaptability to the plastic-wood products is strong, and the installation of various modes of the plastic-wood products can be realized.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is a structural schematic diagram of a cambered-edge transition upright post.

Fig. 2 is a sectional view a-a in fig. 1.

1-a first transverse plate, 2-a second transverse plate, 3-a third transverse plate, 4-a fourth transverse plate, 5-a fifth transverse plate, 6-a sixth transverse plate, 7-a seventh transverse plate, 8-an eighth transverse plate, 9-a ninth transverse plate, 10-a tenth transverse plate, 11-an eleventh transverse plate, 12-a twelfth transverse plate, 13-a thirteenth transverse plate, 14-a fourteenth transverse plate, 15-a fifteenth transverse plate, 16-a sixteenth transverse plate, 17-a seventeenth transverse plate, 18-a first vertical plate, 19-a second vertical plate, 20-a third vertical plate, 21-a fourth vertical plate, 22-a fifth vertical plate, 23-a sixth vertical plate, 24-a seventh vertical plate, 25-an eighth vertical plate, 26-a ninth vertical plate, 27-a tenth vertical plate, 28-an eleventh vertical plate, 29-twelfth vertical plate, 30-thirteenth vertical plate, 31-fourteenth vertical plate, 32-fifteenth vertical plate, 33-sixteenth vertical plate, 34-seventeenth vertical plate, 35-first arc plate, 36-second arc plate, 37-third arc plate, 38-fourth arc plate, 39-eighteenth vertical plate, 40-left upper and lower opening rectangular groove, 41-left lower upper opening rectangular groove, 42-left lower and right opening rectangular groove, 43-right upper and lower opening rectangular groove, 44-right lower upper opening rectangular groove and 45-right lower and left opening rectangular groove.

Detailed Description

Referring to attached drawings 1 and 2, the arc-edge transition upright post comprises a first transverse plate 1, a second transverse plate 2, a third transverse plate 3, a fourth transverse plate 4, a fifth transverse plate 5, a sixth transverse plate 6, a seventh transverse plate 7, an eighth transverse plate 8, a ninth transverse plate 9, a tenth transverse plate 10, an eleventh transverse plate 11, a twelfth transverse plate 12, a thirteenth transverse plate 13, a fourteenth transverse plate 14, a fifteenth transverse plate 15, a sixteenth transverse plate 16, a seventeenth transverse plate 17, a first vertical plate 18 and a second vertical plate 19, a third vertical plate 20, a fourth vertical plate 21, a fifth vertical plate 22, a sixth vertical plate 23, a seventh vertical plate 24, an eighth vertical plate 25, a ninth vertical plate 26, a tenth vertical plate 27, an eleventh vertical plate 28, a twelfth vertical plate 29, a thirteenth vertical plate 30, a fourteenth vertical plate 31, a fifteenth vertical plate 32, a sixteenth vertical plate 33, a seventeenth vertical plate 34, an eighteenth vertical plate 39, a first arc plate 35, a second arc plate 36, a third arc plate 37 and a fourth arc plate 38; the left end of the first transverse plate 1 is connected with the upper right end of the first arc plate 35 to form an integral structure, and the right end of the first transverse plate is connected with the upper left end of the second arc plate 36 to form an integral structure; the left end of the second transverse plate 2 is vertically connected with the upper end of the second vertical plate 19 to form an integral structure, and the right end of the second transverse plate is vertically connected with the upper end of the fourth vertical plate 21 to form an integral structure; the left end of the third transverse plate 3 is vertically connected with the upper end of the twelfth vertical plate 29 to form an integral structure, and the right end of the third transverse plate 3 is vertically connected with the upper end of the fourteenth vertical plate 31 to form an integral structure; the left lower end of the first arc plate 35 is connected with the upper end of the first vertical plate 18 to form an integral structure; the left end of the fourth transverse plate 4 is vertically connected with the lower end of the first vertical plate 18 to form an integral structure, and the right end of the fourth transverse plate 4 is vertically connected with the lower end of the second vertical plate 19 to form an integral structure; the fifth transverse plate 5 is sequentially connected with the seventh vertical plate 24 and the ninth vertical plate 26 to form a vertical cross structure, the left end of the fifth transverse plate is vertically connected with the lower end of the fourth vertical plate 21 to form an integral structure, and the right end of the fifth transverse plate is vertically connected with the lower end of the twelfth vertical plate 29 to form an integral structure; the left end of the sixth transverse plate 6 is vertically connected with the lower end of the fourteenth vertical plate 31 to form an integral structure, and the right end of the sixth transverse plate 6 is vertically connected with the lower end of the sixteenth vertical plate 33 to form an integral structure; the right lower end of the second arc plate 36 is connected with the upper end of the sixteenth vertical plate 33 to form an integral structure; the left end of the seventh transverse plate 7 is vertically connected with the upper end of the eighteenth vertical plate 39 to form an integral structure, and the right end of the seventh transverse plate is vertically connected with the upper end of the third vertical plate 20 to form an integral structure; the lower end of an eighteenth vertical plate 39 is connected with the upper left end of the third arc plate 37 to form an integral structure; the eighth transverse plate 8 is sequentially connected with the seventh vertical plate 24 and the ninth vertical plate 26 to form a vertical crossed structure, the left end of the eighth transverse plate is vertically connected with the upper end of the fifth vertical plate 22 to form an integral structure, and the right end of the eighth transverse plate is vertically connected with the upper end of the thirteenth vertical plate 30 to form an integral structure; the left end of the ninth transverse plate 9 is vertically connected with the upper end of the fifteenth vertical plate 32 to form an integral structure, and the right end of the ninth transverse plate is vertically connected with the upper end of the seventeenth vertical plate 34 to form an integral structure; the lower end of the seventeenth vertical plate 34 is connected with the upper right end of the fourth arc plate 38 to form an integral structure; the left end of the tenth transverse plate 10 is vertically connected with the lower end of the third vertical plate 20 to form an integral structure, and the right end of the tenth transverse plate is vertically connected with the lower end of the fifth vertical plate 22 to form an integral structure; the left end of the eleventh transverse plate 11 is vertically connected with the lower end of the thirteenth vertical plate 30 to form an integral structure, and the right end of the eleventh transverse plate is vertically connected with the lower end of the fifteenth vertical plate 32 to form an integral structure; the left end of the twelfth transverse plate 12 is vertically connected with the upper end of the sixth vertical plate 23 to form an integral structure, and the right end of the twelfth transverse plate is vertically connected with the lower end of the seventh vertical plate 24 to form an integral structure; the left end of the thirteenth transverse plate 13 is vertically connected with the lower end of the ninth vertical plate 26 to form an integral structure, and the right end of the thirteenth transverse plate is vertically connected with the upper end of the tenth vertical plate 27 to form an integral structure; the left end of the fourteenth transverse plate 14 is vertically connected with the lower end of the sixth vertical plate 23 to form an integral structure, and the right end of the fourteenth transverse plate is vertically connected with the upper end of the eighth vertical plate 25 to form an integral structure; the left end of the fifteenth transverse plate 15 is vertically connected with the upper end of the eleventh vertical plate 28 to form an integral structure, and the right end of the fifteenth transverse plate is vertically connected with the lower end of the tenth vertical plate 27 to form an integral structure; the left end of the sixteenth transverse plate 16 is connected with the right lower end of the third arc plate 37 to form an integral structure, and the right end of the sixteenth transverse plate is vertically connected with the lower end of the eighth vertical plate 25 to form an integral structure; the left end of the seventeenth transverse plate 17 is vertically connected with the lower end of the eleventh vertical plate 28 to form an integral structure, and the right end of the seventeenth transverse plate is connected with the left lower end of the fourth arc plate 38 to form an integral structure; a left upper and lower opening rectangular groove 40 is formed among the second transverse plate 2, the fourth transverse plate 4, the fifth transverse plate 5, the second vertical plate 19 and the fourth vertical plate 21; a left lower upper opening rectangular groove 41 is formed among the seventh transverse plate 7, the eighth transverse plate 8, the tenth transverse plate 10, the third vertical plate 20 and the fifth vertical plate 22; a left-lower-right opening rectangular groove 42 is formed among the twelfth transverse plate 12, the fourteenth transverse plate 14, the sixth vertical plate 23, the seventh vertical plate 24 and the eighth vertical plate 25; a right upper and lower opening rectangular groove 43 is formed among the third transverse plate 3, the fifth transverse plate 5, the sixth transverse plate 6, the twelfth vertical plate 29 and the fourteenth vertical plate 31; a right-lower-upper opening rectangular groove 44 is formed among the eighth transverse plate 8, the ninth transverse plate 9, the eleventh transverse plate 11, the thirteenth vertical plate 30 and the fifteenth vertical plate 32; a right, lower and left open rectangular groove 45 is formed among the thirteenth transverse plate 13, the fifteenth transverse plate 15, the ninth vertical plate 26, the tenth vertical plate 27 and the eleventh vertical plate 28.

During production, the mould with the cross section consistent with that of the attached figure 2 is selected and used, and then the traditional section extrusion process is utilized to carry out the continuous production of the utility model.

Claims

1. The cambered edge transition upright column is characterized by comprising a first transverse plate, a second transverse plate, a third transverse plate, a fourth transverse plate, a fifth transverse plate, a sixth transverse plate, a seventh transverse plate, an eighth transverse plate, a ninth transverse plate, a tenth transverse plate, an eleventh transverse plate, a twelfth transverse plate, a thirteenth transverse plate, a fourteenth transverse plate, a fifteenth transverse plate, a sixteenth transverse plate, a seventeenth transverse plate, a first vertical plate, a second vertical plate, a third vertical plate, a fourth vertical plate, a fifth vertical plate, a sixth vertical plate, a seventh vertical plate, an eighth vertical plate, a ninth vertical plate, a tenth vertical plate, an eleventh vertical plate, a twelfth vertical plate, a thirteenth vertical plate, a fourteenth vertical plate, a fifteenth vertical plate, a sixteenth vertical plate, a seventeenth vertical plate, an eighteenth vertical plate, a first cambered plate, a second cambered plate, a third cambered plate and a fourth cambered plate; the left end of the first transverse plate is connected with the upper right end of the first arc plate to form an integral structure, and the right end of the first transverse plate is connected with the upper left end of the second arc plate to form an integral structure; the left end of the second transverse plate is vertically connected with the upper end of the second vertical plate to form an integral structure, and the right end of the second transverse plate is vertically connected with the upper end of the fourth vertical plate to form an integral structure; the left end of the third transverse plate is vertically connected with the upper end of the twelfth vertical plate to form an integral structure, and the right end of the third transverse plate is vertically connected with the upper end of the fourteenth vertical plate to form an integral structure; the left lower end of the first arc plate is connected with the upper end of the first vertical plate to form an integral structure; the left end of the fourth transverse plate is vertically connected with the lower end of the first vertical plate to form an integral structure, and the right end of the fourth transverse plate is vertically connected with the lower end of the second vertical plate to form an integral structure; the fifth transverse plate is sequentially connected with the seventh vertical plate and the ninth vertical plate to form a vertical cross structure, the left end of the fifth transverse plate is vertically connected with the lower end of the fourth vertical plate to form an integral structure, and the right end of the fifth transverse plate is vertically connected with the lower end of the twelfth vertical plate to form an integral structure; the left end of the sixth transverse plate is vertically connected with the lower end of the fourteenth vertical plate to form an integral structure, and the right end of the sixth transverse plate is vertically connected with the lower end of the sixteenth vertical plate to form an integral structure; the right lower end of the second arc plate is connected with the upper end of the sixteenth vertical plate to form an integral structure; the left end of the seventh transverse plate is vertically connected with the upper end of the eighteenth vertical plate to form an integral structure, and the right end of the seventh transverse plate is vertically connected with the upper end of the third vertical plate to form an integral structure; the lower end of the eighteenth vertical plate is connected with the upper left end of the third arc plate to form an integral structure; the eighth transverse plate is sequentially connected with the seventh vertical plate and the ninth vertical plate to form a vertical cross structure, the left end of the eighth transverse plate is vertically connected with the upper end of the fifth vertical plate to form an integral structure, and the right end of the eighth transverse plate is vertically connected with the upper end of the thirteenth vertical plate to form an integral structure; the left end of the ninth transverse plate is vertically connected with the upper end of the fifteenth vertical plate to form an integral structure, and the right end of the ninth transverse plate is vertically connected with the upper end of the seventeenth vertical plate to form an integral structure; the lower end of the seventeenth vertical plate is connected with the upper right end of the fourth arc plate to form an integral structure; the left end of the tenth transverse plate is vertically connected with the lower end of the third vertical plate to form an integral structure, and the right end of the tenth transverse plate is vertically connected with the lower end of the fifth vertical plate to form an integral structure; the left end of the eleventh transverse plate is vertically connected with the lower end of the thirteenth vertical plate to form an integral structure, and the right end of the eleventh transverse plate is vertically connected with the lower end of the fifteenth vertical plate to form an integral structure; the left end of the twelfth transverse plate is vertically connected with the upper end of the sixth vertical plate to form an integral structure, and the right end of the twelfth transverse plate is vertically connected with the lower end of the seventh vertical plate to form an integral structure; the left end of the thirteenth transverse plate is vertically connected with the lower end of the ninth vertical plate to form an integral structure, and the right end of the thirteenth transverse plate is vertically connected with the upper end of the tenth vertical plate to form an integral structure; the left end of the fourteenth transverse plate is vertically connected with the lower end of the sixth vertical plate to form an integral structure, and the right end of the fourteenth transverse plate is vertically connected with the upper end of the eighth vertical plate to form an integral structure; the left end of the fifteenth transverse plate is vertically connected with the upper end of the eleventh vertical plate to form an integral structure, and the right end of the fifteenth transverse plate is vertically connected with the lower end of the tenth vertical plate to form an integral structure; the left end of the sixteenth transverse plate is connected with the right lower end of the third arc plate to form an integral structure, and the right end of the sixteenth transverse plate is vertically connected with the lower end of the eighth vertical plate to form an integral structure; the left end of the seventeenth transverse plate is vertically connected with the lower end of the eleventh vertical plate to form an integral structure, and the right end of the seventeenth transverse plate is connected with the left lower end of the fourth arc plate to form an integral structure.

2. The cambered side transition upright post of claim 1, wherein a left and upper and lower open rectangular groove is formed among the second transverse plate, the fourth transverse plate, the fifth transverse plate, the second vertical plate and the fourth vertical plate; a rectangular groove with a left lower opening and an upper opening is formed among the seventh transverse plate, the eighth transverse plate, the tenth transverse plate, the third vertical plate and the fifth vertical plate; a rectangular groove with a left lower opening and a right opening is formed among the twelfth transverse plate, the fourteenth transverse plate, the sixth vertical plate, the seventh vertical plate and the eighth vertical plate; a right upper and lower opening rectangular groove is formed among the third transverse plate, the fifth transverse plate, the sixth transverse plate, the twelfth vertical plate and the fourteenth vertical plate; a rectangular groove with a right lower opening and an upper opening is formed among the eighth transverse plate, the ninth transverse plate, the eleventh transverse plate, the thirteenth vertical plate and the fifteenth vertical plate; and right, lower and left opening rectangular grooves are formed among the thirteenth transverse plate, the fifteenth transverse plate, the ninth vertical plate, the tenth vertical plate and the eleventh vertical plate.