KR101929878B1 - Hammer crusher - Google Patents

Abstract

The present invention relates to a hammer crusher capable of crushing stone by hitting or striking the stone with a hammer. The hammer crusher includes: a body part forming an internal space for crushing an object; a hopper part formed on an upper side of the body part to insert the object into the internal space of the body part; a rotor part having a cylindrical shape and installed in the internal space of the body part, and rotated by supplied operating force; a crushing part comprising a plurality of hammers installed along the outer surface of the rotor part in a row, and crushing the object inserted through the hopper part by using rotational force of the rotor part; a protecting part surrounding the inner surface of the body part to prevent the inside of the body part from being damaged by friction with the object crushed by the crushing part; an operating part installed outside the body part to generate and supply operating force to the rotor part; and an operation control part installed outside the hopper part, and controlling the operation of the rotor part and the operating part.

Description

Hammer Crusher {HAMMER CRUSHER}

The present invention relates to a hammer crusher, and more particularly, to a hammer crusher capable of crushing or striking a stone such as a stone with a hammer.

In a conventional crusher, a space is formed in which a stone can be poured upward. A rotary shaft is provided at the center of the rotary shaft, and a pulley and a belt are connected to the motor at one side thereof.

In the rotary shaft, a plurality of hammer mounting bases are installed at regular intervals in the space, and a hammer is installed therebetween. The hammer is rotated at a high speed by rotating the hammer at a high speed to crush the input stone, .

However, the conventional hammer is manufactured by pouring casting with cast steel or manganese, and then drilling the hole and connecting it to the hammer mount. However, since the lifetime is too short, it is necessary to replace with a new hammer after working for about two days.

As described above, there is a drawback that the lifetime is too short, and when the hammer is replaced, a large number of hammers must be separated from the mounting base and replaced with a new hammer.

Korean Patent No. 10-0878844 Korean Registered Utility Model No. 20-0273781

One aspect of the present invention provides a hammer crusher which can be crushed by crushing or colliding a stone such as a stone with a hammer.

The present invention also provides a hammer crusher which can be easily crushed and crushed by sorting the stone to be crushed easily.

The technical problem of the present invention is not limited to the technical problems mentioned above, and other technical problems which are not mentioned can be understood by those skilled in the art from the following description.

      A hammer crusher according to an embodiment of the present invention includes: a main body portion forming an inner space for crushing a crushed material; A hopper part formed at an upper side of the main body part to inject the object to be crushed into the internal space of the main body part; And a rotor part formed in a cylindrical shape and installed in an inner space of the main body part and rotated by receiving a driving force.

     The hammer crusher according to an embodiment of the present invention is formed of a plurality of hammers installed along the outer surface of the rotor to heat the crusher, part; A protective portion surrounding the inner surface of the body portion to prevent the inner portion of the body portion from being damaged by friction with the object to be crushed by the crushing portion; A driving unit installed outside the main body to form a driving force to supply the driving force to the rotor unit; And a drive control unit installed outside the hopper unit and controlling driving of the drive unit and the rotor unit, wherein the drive control unit includes: a case part for protecting a circuit installed in the internal space; A protective sheet portion attached to a front surface of the case portion to protect the front surface of the case portion; A display unit installed on a front surface of the casing unit to display driving information of the driving unit and the rotor unit; And a control unit for controlling driving of the driving unit and the rotor unit and generating driving information according to driving of the driving unit and the rotor unit and transmitting the generated driving information to the display unit, Wherein the cork powder comprises 110 to 130 parts by weight of polyethylene resin (HDPE), 170 to 190 parts by weight of talc, 1 to 10 parts by weight of germanium powder, 15 to 25 parts by weight of glass fiber reinforced plastic, 2 to 7 parts by weight of glue, 1 to 4 parts by weight of sucrose (C12H22O11) powder, 2 to 5 parts by weight of alum and 3 to 8 parts by weight of boehmite (AlO (OH)), and having a specific gravity of 1.02 to 1.10 Wherein the protective sheet portion is made of the same plastic adjustment material as the case portion, and the protective sheet portion is composed of 30 to 90 parts by weight of an ethylene vinyl acetate (EVA) resin, 1 to 30 parts by weight of polyvinyl alcohol (PVA) By weight, calcium carbonate 5 to 30 parts by weight of a surfactant, 0.1 to 1 part by weight of a surfactant, 1 to 20 parts by weight of a thixotropic agent, 3 to 7 parts by weight of sodium silicate, 1 to 5 parts by weight of molybdenum disulfide (MoS2) And 10 to 30 parts by weight of water as a solvent and at least one of toluene-diisocyanate (TDI), hydrogenated TDI, trimethyl propane-TDI, tripehnylmethane- diisocyanate (MDI), hydrogenated MDI, and hexamethylene-diisocyanate (HDI), as well as at least one component selected from the group consisting of triisocyanate (TTI), diphenylmethane-4,4-diisocanate And is attached to the front surface of the case part by an adhesive composition comprising a curing agent contained in an amount of 1 to 20 parts by weight based on 100 parts by weight of the subject.

A hammer crusher according to an embodiment of the present invention includes: a main body portion forming an inner space for crushing a crushed material; A hopper part formed at an upper side of the main body part to inject the object to be crushed into the internal space of the main body part; A rotor part formed in a cylindrical shape and installed in an internal space of the main body part and rotated by receiving a driving force; A crushing part formed of a plurality of hammers arranged in rows along an outer side surface of the rotor part, the crushing part crushing the crushed material to be introduced through the hopper part using the rotational force of the rotor part; A protective portion surrounding the inner surface of the body portion to prevent the inner portion of the body portion from being damaged by friction with the object to be crushed by the crushing portion; A driving unit installed outside the main body to form a driving force to supply the driving force to the rotor unit; And a driving control unit installed outside the hopper unit and controlling driving of the driving unit and the rotor unit.

In one embodiment, the drive control unit includes: a case part for protecting a circuit installed in the internal space; A protective sheet portion attached to a front surface of the case portion to protect the front surface of the case portion; A display unit installed on a front surface of the casing unit to display driving information of the driving unit and the rotor unit; And a control unit for controlling driving of the driving unit and the rotor unit and generating driving information according to driving of the driving unit and the rotor unit and transmitting the generated driving information to the display unit, Wherein the cork powder comprises 110 to 130 parts by weight of polyethylene resin (HDPE), 170 to 190 parts by weight of talc, 1 to 10 parts by weight of germanium powder, 15 to 25 parts by weight of glass fiber reinforced plastic, 2 to 7 parts by weight of glue, 1 to 4 parts by weight of sucrose (C12H22O11) powder, 2 to 5 parts by weight of alum and 3 to 8 parts by weight of boehmite (AlO (OH)), and having a specific gravity of 1.02 to 1.10 Wherein the protective sheet portion is made of the same plastic adjustment material as the case portion, and the protective sheet portion is composed of 30 to 90 parts by weight of an ethylene vinyl acetate (EVA) resin, 1 to 30 parts by weight of polyvinyl alcohol (PVA) By weight, calcium carbonate 5 to 30 parts by weight of a surfactant, 0.1 to 1 part by weight of a surfactant, 1 to 20 parts by weight of a thixotropic agent, 3 to 7 parts by weight of sodium silicate, 1 to 5 parts by weight of molybdenum disulfide (MoS2) And 10 to 30 parts by weight of water as a solvent and at least one of toluene-diisocyanate (TDI), hydrogenated TDI, trimethyl propane-TDI, tripehnylmethane- diisocyanate (MDI), hydrogenated MDI, and hexamethylene-diisocyanate (HDI), as well as at least one component selected from the group consisting of triisocyanate (TTI), diphenylmethane-4,4-diisocanate And may be attached to the front surface of the case part by an adhesive composition comprising a curing agent contained in an amount of 1 to 20 parts by weight based on 100 parts by weight of the subject.

According to one aspect of the present invention, a stone such as a stone can be easily crushed by striking or colliding with it, and the stone having a size to be crushed can be easily broken up after easily distinguishing the stone by size.

1 and 2 are views showing a schematic configuration of a hammer crusher according to an embodiment of the present invention.
3 is a view for explaining the drive control unit of FIG.
Figs. 4 to 6 are views for explaining the conveyance unit. Fig.
7 to 9 are views for explaining the elastic portion of Fig.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

1 and 2 are views showing a schematic configuration of a hammer crusher according to an embodiment of the present invention.

1, a hammer crusher 10 according to an embodiment of the present invention includes a main body 100, a hopper 200, a rotor 300, a crusher 400, a protector 500, A driving unit 600, and a driving control unit 700.

The body portion 100 forms an inner space for the rotor portion 300 for crushing the object to be crushed and forms a hopper portion 200 for introducing the object to be crushed into the inner space of the upper portion, A protective portion 500 is attached to surround the inner surface to prevent damage during the crushing process of the crushed material.

The hopper part 200 is formed on one side of the upper part of the main body part 100 to allow the object to be crushed into the internal space of the main body part 100.

2, a portion of the driving shaft 310, which forms the central axis of rotation, is formed on the outer side of the main body 100, as shown in FIG. 2, And the driving shaft 310 is rotated by a driving force from a driving unit 600 using a belt or the like.

The crushing unit 400 is formed of a plurality of hammers 400-1 to 400-N installed along the outer surface of the rotor unit 300 to heat the hopper unit 300. By using the rotational force of the rotor unit 300, And crushes and crushes the object to be crushed inputted through the crusher 200.

In one embodiment, each of the crushing parts 400-1 to 400-N may be formed as one body as shown in FIG. 2, and one crushing part 400-1 It may be possible to break up the crushed pieces individually by dividing them into a plurality of crushed pieces.

The protection unit 500 is installed to surround the inner surface of the main body 100 so as to prevent the inside of the main body 100 from being damaged by friction with the object to be crushed by the crushing unit 400 .

The driving unit 600 is provided outside the main body 100 and generates driving force by driving control of the driving control unit 700 and supplies the driving force to the rotor unit 300 (i.e., the driving shaft 310).

The drive control unit 700 is installed outside the hopper unit 200 and controls driving of the driving unit 600 and the rotor unit 300.

The hammer crusher 10 having the above-described structure can be easily crushed by striking or colliding stones such as stones.

3 is a view for explaining the drive control unit of FIG.

3, the drive control unit 700 includes a case unit 710, a protective sheet unit 720, a display unit 730, and a control unit 740.

The case 710 protects a circuit such as the control unit 740 installed in the internal space and is provided with a display unit 730 on the front surface and a protective sheet 720 on the front surface except for the portion where the display unit 730 is installed And is inserted into the mounting groove 110 formed in the main body 100.

In one embodiment, the casing portion 710 is formed by mixing 110 to 130 parts by weight of high-density polyethylene resin (HDPE), 170 to 190 parts by weight of talc, and 1 to 10 parts by weight of germanium powder with respect to 100 parts by weight of the polypropylene resin 15 to 25 parts by weight of glass fiber reinforced plastic, 2 to 7 parts by weight of glue, 5 to 10 parts by weight of cork powder, 1 to 4 parts by weight of sucrose (C12H22O11) powder, 2 to 5 parts by weight of boehmite, (OH)), and having a specific gravity of 1.02 to 1.10.

Accordingly, the case 710 is made of a high density polyethylene resin (HDPE) 110 to 130 (hereinafter, referred to as " HDPE ") based on 100 parts by weight of the polypropylene resin so as to radiate far infrared rays that improve mechanical properties and twisting phenomenon and promote metabolism of the body. 1 to 10 parts by weight of talc, 1 to 10 parts by weight of germanium powder, 15 to 25 parts by weight of glass fiber reinforced plastic, 2 to 7 parts by weight of glue, 5 to 10 parts by weight of cork powder, sucrose (C12H22O11) 1 to 4 parts by weight of powder, 2 to 5 parts by weight of alum and 3 to 8 parts by weight of boehmite (AlO (OH)), and having a specific gravity of 1.02 to 1.10.

The plastic composition for manufacturing the case part 710 of the present invention may include a polypropylene resin, a high density polyethylene resin (HDPE), a talc, and a germanium powder.

When the above-mentioned plastic composition is used, it is possible to improve the mechanical properties such as heat resistance and durability, to improve the twisting phenomenon, to promote the metabolism by radiating the far-infrared rays and to improve the storage stability of the food stored in the plastic container It is possible to produce an effect of producing a plastic sheet (product) which can be improved.

Polypropylene resin is a thermoplastic resin which is obtained by polymerization of propylene and is known as an environmentally friendly material which is inexpensive in performance and is free from the risk of contact with the contents of foods or cosmetics. It is excellent in properties and thermal properties.

The polypropylene may be at least one selected from a propylene homopolymer, a random copolymer, and a block copolymer. In order to improve the mechanical properties, a homopolymer and a random copolymer are mixed at a weight ratio of 3: 2 .

High-density polyethylene (HDPE) resin is a synthetic resin produced by polymerizing ethylene, and has excellent flowability, rigidity, impact resistance, electrical insulation, moldability, and cold resistance.

The high-density polyethylene resin may have the effect of improving the formability by mixing with the polypropylene resin to strengthen the tensile force in the production of the plastic sheet or the product, and a variety of known products can be used.

Talc improves mechanical properties such as strength and heat resistance of a plastic composition, and it is preferable to use a talc powder having a particle size of 150 to 200 mesh for mixing with a polypropylene resin or the like.

The talc may be used in admixture with other filler components, and may preferably be mixed with the dolomite powder at a weight ratio of 1: 1 to contribute to improvement of the durability of the plastic composition.

Germanium is a silver-white quasi-metal, which has the effect of promoting metabolism by radiating a large amount of far-infrared rays and anions which are beneficial to the human body.

In addition, germanium, due to its semiconducting properties, causes germanium ions (outer electrons) to enter the body when it comes into contact with the skin, thereby enhancing the vitality. When it enters the body, it is released out of the body in 20 to 30 hours together with various harmful substances. There is no side effect at all.

Particularly, when the particles of inorganic germanium come into contact with human skin, semiconductor properties are introduced into the skin tissue by the osmotic action of the outer electron. It has been found that germanium, which penetrates into capillaries in subcutaneous tissue, moves electrons in blood vessels through blood vessels, cleanses blood, normalizes blood, and discharges excess electrons to relieve pain.

The germanium can be used in the form of a powder. It is preferable that the germanium ore is finely cut to 3 cm or less and then the cut germanium ore is pulverized to a particle size of 80 to 100 mesh.

In one embodiment, the plastic composition preferably comprises 110 to 130 parts by weight of high-density polyethylene resin, 170 to 190 parts by weight of talc, and 1 to 10 parts by weight of germanium powder, based on 100 parts by weight of the polypropylene resin.

When the case 710 is manufactured using the plastic composition, it is important to control the specific gravity of the plastic composition in order to eliminate the twisting phenomenon. The specific gravity is preferably 1.02 to 1.10, more preferably 1.03 to 1.05 That is, the high-density polyethylene resin is less than 110 parts by weight or the talc is less than 170 parts by weight based on 100 parts by weight of the polypropylene resin, the strengthening of the mechanical properties such as durability is limited, If the high-density polyethylene resin exceeds 130 parts by weight or the talc exceeds 190 parts by weight, the specific gravity of the plastic composition may increase and the moldability may be deteriorated.

If the amount of the germanium powder is less than 1 part by weight with respect to 100 parts by weight of the polypropylene resin, far infrared ray emission effect due to germanium is difficult to manifest. If the amount is more than 10 parts by weight, It can become bad.

In one embodiment, the plastic composition described above may further comprise glass fiber reinforced plastic to enhance impact resistance.

Fiberglass Reinforced Plastic (FRP) is a material in which glass-based minerals are used as main materials and aromatic nylon fibers and thermosetting resins are combined with glass-based minerals.

The glass-based mineral may be at least one selected from the group consisting of silica sand, limestone, feldspar, and soda ash, but is not limited thereto.

As the thermosetting resin, various known thermosetting resins can be used, and preferably, polyester or epoxy resin can be used.

Glass fiber reinforced plastics can be produced by mixing materials such as glass-based minerals and putting them into a melting furnace. Each air layer sealed between glass fibers functions as a heat insulating layer, so that it is excellent in incombustibility, sound absorption property and workability.

Also, it is stronger than iron, lighter than aluminum, and does not rust. It has excellent nonflammability and is not deformed by heat and is easy to process.

At this time, it is preferable to add glue to improve the mixing property with glass fiber reinforced plastic (pellet type) and PVC.

Glue is a substance that solidifies the liquid of an animal such as an animal's skin, intestines, bones, etc., and solves problems such as the release of environmental hormones while improving the binding force of each component.

The glass fiber reinforced plastic and the glue are preferably contained in an amount of 15 to 25 parts by weight and 2 to 7 parts by weight, respectively, based on 100 parts by weight of the polypropylene resin. If the glass fiber reinforced plastic and the glue are less than the above range, If it exceeds the range, the product may be cracked during production and is uneconomical.

In one embodiment, the cork powder may be further included to improve the elasticity of the case portion 710 using the plastic composition.

The cork powder can be prepared by removing the shell of oak oak, and then crushing it. For the cork powder to be mixed with polypropylene resin or the like, it is preferable to use fine pulverized particles which are sieved through a mesh of 400 mesh or more.

The cork powder is preferably contained in an amount of 5 to 10 parts by weight based on 100 parts by weight of the polypropylene resin. When the cork powder is less than 5 parts by weight, the degree of improvement of the elasticity is insignificant. When the cork powder is more than 10 parts by weight, The voids formed in the inside during manufacturing may become large and the durability may be weakened.

In addition, sucrose (C12H22O11) powder may be further added to improve the mixing property of the cork powder and other ingredients.

The sucrose not only smoothes the pores formed between the cork powders but also tends to be viscous in the process of mixing with PVC and the like, which can catch the molecules causing the problem of bad odor, which can contribute to solving the problem of bad odor.

The sucrose is preferably a powder that has been passed through a 500-mesh net, and is preferably contained in an amount of 1 to 4 parts by weight based on 100 parts by weight of the polypropylene resin. When sucrose is less than 1 part by weight, If the amount is more than 4 parts by weight, it is not only economical but also may weaken the mechanical properties of the product.

In one embodiment, the plastic composition may further comprise a white powder. Potassium alum (potassium aluminum sulfate, AlK (SO4) 2 · 12H2O) can be used as the alum, and it can be obtained from natural alum.

Concretely, it can be produced by dissolving alunculus in water and filtering it, then breaking it, and cooling it if irregularly shaped crystals are formed. The alumina is preferably contained in an amount of 2 to 5 parts by weight based on 100 parts by weight of the polypropylene resin. When the alumina content is less than 2 parts by weight, the alumina effect is insignificant.

In one embodiment, the plastic composition according to the present invention may further comprise boehmite (Boehmite, AlO (OH)) to improve antimicrobial properties.

Boehmite can be any of γ-boehmite, a-boehmite and pseudo-boehmite. Among these, boehmite is excellent in crystallinity, excellent in thermal stability and chemical stability, structurally neutral, It is preferable to use an excellent? -Behoeite.

The γ-boehmite can be produced by supercritical synthesis of only water (pure water) and aluminum (Al). It is preferable that boehmite is included in 3 to 8 parts by weight with respect to 100 parts by weight of the polypropylene resin. If the content of boehmite is less than 3 parts by weight, it is difficult to exhibit the antimicrobial effect to be achieved. There is a possibility that the mixing property of the resin is deteriorated.

Hereinafter, the composition and effect of the plastic composition according to the present invention will be described in more detail with reference to specific examples and comparative examples. However, this embodiment is intended to explain the present invention more specifically, and the scope of the present invention is not limited to these embodiments.

[Example 1]

180 kg of polypropylene resin, 200 kg of high density polyethylene resin (HDPE), 310 kg of talc and 15 kg of germanium powder were mixed to prepare a plastic composition.

[Example 2]

And 36 kg of glass fiber reinforced plastic and 9 kg of glue were further mixed to prepare a plastic composition.

[Example 3]

9 kg of cork powder, 5 kg of sucrose powder, 5 kg of white powder, and 9 kg of gamma-boehmite were further mixed to prepare a plastic composition.

[Comparative Example 1]

Was prepared in the same manner as in Example 1, except for talc.

[Experimental Example 1: Evaluation of impact resistance]

A specimen (20 cm * 30 cm, thickness 20 mm) was prepared using the plastic compositions of Examples 1 to 3 and Comparative Example 1, and a weight of 3 kg was dropped at a height of 2 m. The degree of breakage of each specimen was measured, The results are shown in Table 1 below.

As can be seen from the above Table 1, it was found that the examples including the talc were superior in impact resistance as compared with Comparative Example 1 which did not include talc. In particular, in Examples 2 and 3 containing glass fiber reinforced plastics, the best results were obtained.

[Experimental Example 2: Evaluation of heat resistance]

The specimen of Experimental Example 1 was heated for 3 hours in a hot air circulating heating furnace maintained at 80 ° C, and yellowing degree was visually observed. The results are shown in Table 2 below.

As can be seen from Table 2, in Examples 1 to 3, yellowing portions were hardly observed unlike Comparative Example 1. As a result, it was found that the heat resistance of the example was much better than that of the comparative example 1.

[Experimental Example 3: Evaluation of antimicrobial activity]

Example 1, Example 3 and Comparative Example 1 were subjected to a test for antibacterial activity (JIS Z 2801). Aspergillus niger ATCC 9642 (fungus) was used as the test strain and the antibacterial activity (antibacterial activity value) was evaluated and shown in Table 3 below.

The antimicrobial activity value refers to a value obtained by evaluating the degree of antimicrobial activity by comparing the number of strains cultured for a certain period of time. When the value is 1 or more, 90% or more of the strains are present, 2 or more are 99% , More than 99.99% of the strain is over 4, and more than 5 is more than 99.999% of the strain is killed.

As can be seen from the above Table 3, it was predicted that the antibacterial activity of Example 3 including gamma-boehmite was much better than those of other cases.

The protection sheet portion 720 is attached to the front surface of the case portion 710 to protect the front surface of the case portion 710.

In one embodiment, the protective sheet portion 720 is made of the same plastic preparation as the case portion 710 and is made of polyvinyl alcohol (PVA) 1 to 30 parts by weight of ethylene vinyl acetate (EVA) (MoS2), sodium silicate (3 to 7 parts by weight), calcium carbonate (5 to 30 parts), surfactant (0.1 to 1 part), thixotropic imparting agent (1 to 20 parts) 1 to 5 parts by weight of aluminum hydroxide, 5 to 10 parts by weight of aluminum hydroxide and 10 to 30 parts by weight of water as a solvent and a mixture of toluene-diisocyanate (TDI), hydrogenated TDI, trimethyl propane-TDI (TDI), tripe- nylmethane-triisocyanate (TTI), diphenylmethane-4,4-diisocy- anate (MDI), hydrogenated MDI, and hexamethylene-diisocyanate hexamethylene-diisocyanate, < RTI ID = 0.0 > HDI) Made of a carbonate compound, it may be attached to the front of the case 710 with an adhesive composition comprising a curing agent that is an amount of 1-20 parts by weight per 100 parts by weight of the subject.

In one embodiment, the adhesive composition used for attachment of the protective sheet portion 720 is an adhesive composition comprising a topical and a curing agent, the subject of which is a composition comprising 30 to 90 parts by weight of an ethylene vinyl acetate (EVA) resin, 1 to 30 parts by weight of water, 10 to 30 parts by weight of water, 5 to 30 parts by weight of calcium carbonate, 0.1 to 1 part by weight of a surfactant and 1 to 20 parts by weight of a thixotropic agent, can do.

The adhesive composition is a water-soluble two-component adhesive composition composed of a subject and a curing agent, which can be applied and cured to produce an adhesive sheet or an adhesive. The adhesive composition is excellent in physical properties such as adhesiveness and heat resistance Wood board such as plywood, inorganic board such as magnesium board, PVC, and the like.

The subject basically comprises an ethylene vinyl acetate (EVA) resin, polyvinyl alcohol (PVA), water, calcium carbonate, a surfactant and a thixotropic agent, the ethylene vinyl acetate resin being the main component of the subject, The strength of the adhesive sheet or adhesive can be kept constant.

Conventionally, an epoxy resin is used as a main component of an adhesive sheet or an adhesive. However, in the case of an adhesive sheet or an adhesive using an epoxy resin, volatile organic compounds such as benzene toluene are released to adversely affect the environment and human body.

However, the adhesive composition of the present invention can solve problems such as environmental problems by excluding an epoxy resin.

Polyvinyl alcohol (PVA) has a role of improving the heat resistance, water resistance and adhesiveness of an adhesive sheet or adhesive to be produced.

The polyvinyl alcohol is preferably contained in an amount of 1 to 30 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin. When the amount of the polyvinyl alcohol is less than 1 part by weight, it is difficult to improve the heat resistance, , The relative content of ethylene vinyl acetate may be reduced and the cohesive force of the adhesive sheet or adhesive may be weakened.

Further, in the present invention, antimony oxide and zirconium oxide may be used together with polyvinyl alcohol in order to supplement the functionality of polyvinyl alcohol when used in an ondol floor or the like.

Antimony oxide and zirconium oxide are materials capable of enhancing the heat resistance of the adhesive sheet or adhesive to be produced and are preferably contained in an amount of 5 to 10 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin. The effect of enhancing is insignificant, and when it exceeds the above range, it is uneconomical.

Water can be used as a solvent for the subject.

INDUSTRIAL APPLICABILITY The present invention has the effect of solving the environmental pollution problem without using a volatile organic solvent unlike the conventional adhesive sheet or adhesive.

Water is preferably contained in an amount of 10 to 30 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin. When the amount of water is less than 10 parts by weight, ethylene vinyl acetate resin and the like can not be effectively dissolved. The strength of the adhesive sheet or the adhesive may be lowered.

Calcium carbonate modulates the viscosity of the adhesive composition and reduces shrinkage upon curing.

The calcium carbonate is preferably contained in an amount of 5 to 30 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate (EVA) resin. When the amount of calcium carbonate is less than 5 parts by weight, sufficient shrinkage does not occur during curing, If the amount is more than 30 parts by weight, the viscosity may become too tight and the productivity may be deteriorated.

In addition, the present invention may use various materials such as wormwood and clay to replace calcium carbonate. For example, dolomite and / or talc may be used.

In order to improve the mechanical properties, dolomite and talc are preferably mixed at a weight ratio of 1: 1, and the powder preferably has a particle size of 150 to 200 mesh, The use of the finely pulverized powder to improve the mixing property with other components such as ethylene vinyl acetate resin.

The surfactant is used in order to reduce the surface tension when mixing the adhesive composition and to improve the coating property.

The surfactant is preferably contained in an amount of 0.1 to 1 part by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin.

As the surfactant, known nonionic surfactants and anionic surfactants can be used, but in order to effectively reduce the surface tension, it is preferable to use a gemini type sulfonic acid type surfactant containing an alkyl chain having 8 to 14 carbon atoms .

The thixotropic agent prevents the adhesive composition from flowing down by suppressing the separation phenomenon between the subject and the curing agent when the adhesive composition is applied to the adhesive sheet or the adhesive, and it is possible to use various known various substances such as silica, acryl copolymer and the like But it is preferable to use a clay.

Clay is an aggregate of fine hydrated silicate minerals. It refers to a material that is mixed with an appropriate amount of water and kneaded to produce plasticity, exhibits rigidity when dried, and sintered when baked at a high temperature.

Specifically, at least one powder selected from the group consisting of kaolinite, fumed silica and bentonite may be used, but in order to obtain the best effect, it is preferable to use a mixture of fumed silica and bentonite in a weight ratio of 1: 1.

The thixotropic agent is preferably contained in an amount of 1 to 20 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin. When the thixotropic imparting agent is less than 1 part by weight, the flowability can not be sufficiently controlled, If the amount is more than 50 parts by weight, the flowability may be excessively vanished and the productivity may be lowered.

In addition, the subject may further include sodium silicate to improve the adhesive strength of the adhesive sheet or adhesive to be produced.

Unlike conventional adhesives, sodium silicate does not cause pollution and is environmentally friendly and has excellent adhesion.

The sodium silicate is preferably contained in an amount of 3 to 7 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin based on the solid content. When the amount of the sodium silicate is less than 3 parts by weight, If it exceeds 7 parts by weight, miscibility with other components may be deteriorated.

The subject may further include molybdenum disulfide to improve the abrasion resistance of the adhesive sheet or adhesive to be produced.

Molybdenum disulphide (MoS2) is found in thin veins in minerals and is mined and used as a lubricant.

Molybdenum disulfide (MoS2) has inherent characteristics of a hexagonal crystal structure in which shear is easily generated, such as graphite, but the lubricating action is superior to that of graphite.

The molybdenum disulfide is preferably contained in an amount of 1 to 5 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin based on the solid content. When the amount of the molybdenum disulfide is less than 1 part by weight, the abrasion resistance can not be effectively improved. If it is exceeded, it may rather deteriorate the adhesive strength.

At this time, copper powder may be mixed with molybdenum disulfide.

Further, the subject may further include a flame retardant agent to improve the flame retardancy of the adhesive sheet or adhesive to be produced.

The flame retardant is preferably contained in an amount of 1 to 5 parts by weight based on 100 parts by weight of the ethylene vinyl acetate resin. When the flame retardant is less than 1 part by weight, the degree of improvement of the flame retardancy is insignificant. In addition, there is a fear that the miscibility with other components may deteriorate.

The flame retardant can be a white powder, which can be a potassium alum (potassium aluminum sulfate, AlK (SO 4) 2 .12H 2 O) and can be obtained from natural alum.

Concretely, it can be produced by dissolving alunculus in water and filtering it, then breaking it, and cooling it if irregularly shaped crystals are formed.

In addition, the subject may further include aluminum hydroxide to improve the antibacterial property of the adhesive sheet or adhesive to be produced.

As the aluminum hydroxide, boehmite (AlO (OH)) is preferably used.

Boehmite can be any of γ-boehmite, a-boehmite and pseudo-boehmite. Among these, boehmite is excellent in crystallinity, excellent in thermal stability and chemical stability, structurally neutral, It is preferable to use an excellent? -Behoeite.

The γ-boehmite can be produced by supercritical synthesis of only water (pure water) and aluminum (Al).

It is preferable that aluminum hydroxide is contained in an amount of 5 to 10 parts by weight based on 30 to 90 parts by weight of ethylene vinyl acetate. When the content of aluminum hydroxide is less than 5 parts by weight, it is difficult to exhibit the antimicrobial effect to be achieved, There is a possibility that the miscibility with other components may be impaired.

As the curing agent, those containing an isocyanate compound can be used.

The isocyanate compound has excellent solubility in water, and the curing agent can be uniformly mixed to the subject to maintain the proper viscosity and hardness, thereby shortening the curing time, and prolonging the pot life when mixing the curing agent with the curing agent, It has a remarkable improvement.

The isocyanate compound is preferably a compound containing at least two isocyanate groups in one molecule, and is preferably a compound containing at least two isocyanate groups in a molecule, such as toluene-diisocyanate (TDI), hydrogenated TDI, trimethylpropane-TDI Tripe- nylmethane-triisocyanate (TTI), diphenylmethane-4,4-diisocy- anate (MDI), hydrogenated MDI, or hexamethylene-diisocyanate , And it is preferable that the curing agent is included in an amount of 1 to 20 parts by weight based on 100 parts by weight of the subject.

The above-mentioned adhesive composition is prepared by mixing a subject and a curing agent to prepare an aqueous two-part adhesive composition, and then applying and curing the composition to a work site. If necessary, the adhesive composition may be partially or completely removed, And may further contain a dispersing agent, an antifoaming agent, an antiseptic agent, a thickening agent and the like within the range not hindering the object of the present invention, and may further include a coloring component to realize various colors of the adhesive sheet or adhesive to be produced .

Hereinafter, the composition and effect of the adhesive composition according to the present invention will be described in more detail through specific examples and comparative examples. However, this embodiment is intended to explain the present invention more specifically, and the scope of the present invention is not limited to these embodiments.

[Example 4]

80 parts by weight of ethylene vinyl acetate, 20 parts by weight of polyvinyl alcohol, 25 parts by weight of water, 10 parts by weight of calcium carbonate, 1 part by weight of a surfactant and 5 parts by weight of a thixotropic agent were mixed to prepare a subject. Toluene-diisocyanate and 25 parts by weight of a curing agent containing toluene-diisocyanate (TDI) were mixed and cured to prepare an adhesive sheet or an adhesive.

At this time, a gemini surfactant having 8 carbon atoms was used as a surfactant. The overall process of synthesis of the surfactant started with the reaction of diamine with 1-bromoalkane. 0.1 mole of N, N, N ', N'-tetramethyl-1,3-diaminopropane (N, N', N'- -bromooctane) was added to 300 g of acetonitrile and stirred for 30 minutes. The solution was refluxed at 353 K for 12 hours, and then the acetonitrile solvent was removed using a rotary evaporator. 500 g of diethylether was added to the resulting product to recrystallize the product. After filtering, it was washed with 500 g of diethyl ether and unreacted impurities were removed.

The product thus obtained was treated in a 323 K vacuum oven for 12 hours to remove residual solvent to prepare a gemini surfactant.

[Example 5]

Except that 5 parts by weight of atomium oxide and 5 parts by weight of zirconium oxide were further added in the form of powder to the subject.

[Example 6]

Except that 5 parts by weight of sodium silicate, 3 parts by weight of molybdenum disulfide, 3 parts by weight of alumina and 8 parts by weight of? -Behohexite were further added in powder form to the subject. Respectively.

[Comparative Example 2]

A comparative example 2 is a conventional epoxy ondol floor adhesive (SEP-4300, manufactured by Samchang Korea).

[Experimental Example 4: Adhesion Test]

An adhesive strength test (KS F 4715) was carried out for the Example and Comparative Example 2, and the results are summarized in Table 4 below.

The adhesion strength of the LH construction was 0.8 N / mm 2 or more as the acceptance standard, and all of the examples 4 to 6 and the comparative example 2 satisfied the acceptance criteria. However, it was found that the bonding strengths of Examples 4 to 6 were superior to those of Comparative Example 2.

[Experimental Example 5: Evaluation of heat resistance]

The adhesive sheets or adhesives of Examples 4 to 6 and Comparative Example 2 were heated for 8 hours in a hot-air circulating heating furnace maintained at 80 캜, and the yellowing degree was visually observed. The results are shown in Table 5 .

As can be seen from Table 5, in Examples 4 to 6, yellowing portions were hardly observed unlike Comparative Example 2. As a result, it was found that the heat resistance of the example was much better than that of Comparative Example 2.

[Experimental Example 6: Evaluation of antimicrobial activity]

The adhesive compositions of Example 6 and Comparative Example 2 were subjected to an antibacterial activity test (JIS Z 2801). Aspergillus niger ATCC 9642 (fungus) was used as a test strain and the antibacterial activity (antibacterial activity value) was evaluated and shown in Table 6 below.

The antimicrobial activity value refers to a value obtained by evaluating the degree of antimicrobial activity by comparing the number of strains cultured for a certain period of time. When the value is 1 or more, 90% or more of the strains are present, 2 or more are 99% , More than 99.99% of the strain is over 4, and more than 5 is more than 99.999% of the strain is killed.

As can be seen from the above Table 6, Example 6 including gamma-boehmite showed excellent antimicrobial activity as compared with Comparative Example 2.

The display unit 730 is installed on the front surface of the case unit 710 and includes a driving unit 600 and a rotor unit (not shown) that are transmitted from the control unit 740 using display means (e.g., (For example, the rotational speed of the rotor section 300, the heat generation state of the rotor section 300, or the wear state of the rotor section 300, and the like).

The control unit 740 controls driving of the driving unit 600 and the rotor unit 300 (for example, the line speed or torque of the rotor unit 300), and controls the driving unit 600 and the rotor unit 300 Generates drive information according to driving, and transmits the generated driving information to the display unit 730.

The hammer crusher 10 having the above-described structure may further include a transfer unit 800.

Referring to FIG. 4, the transporting unit 800 transports the size of the object to be crushed according to the transport distance to the hopper unit 200.

That is, the transporting unit 800 classifies the crushed material, which is gradually larger in size from the rear end to the front end, so that, as a user, the transporting unit 800 is provided at the lower part where the crushed material of a size desired to be crushed by the present invention is classified, The inlet of the hopper 200 of the hammer crusher 10 according to an embodiment of the present invention can be positioned so that the size of the object to be crushed can be selected.

In one embodiment, the transfer portion 800 may include a transfer roller portion 810, a belt portion 820, a fuse portion 830, and an elastic portion 840 (see FIG. 5).

A plurality of conveying rollers 811-1 to 811-N, which are provided so that the length becomes longer from the rear end to the front end and the interval between the conveying rollers 811-1 to 811-N becomes wider, And is formed in a symmetrical structure.

The length of the conveying roller 811 gradually increases from the conveying roller 811-1 located at the rear end of the conveying roller portion 810 to the conveying roller 811-N located at the front end of the conveying roller portion 810 And the gap between the transporting rollers 811 is also widened.

Accordingly, a small-sized object to be crushed can be downwardly divided at the rear end of the conveying roller portion 810, and the object to be crushed at a larger size toward the front end of the conveying roller portion 810 is downwardly divided can do.

5, the conveying roller portion 810 may include a conveying roller 811, a bearing 812, a driving motor 813, and an extension frame 814. [

The conveying roller 811 is connected to the driving motor 813 and is driven by the driving motor 813 to rotate the conveying roller 811 in the forward direction of the conveying roller 810.

The bearing 812 is installed on one side of the conveying roller 811 connected to the driving motor 813 to rotate while supporting the conveying roller 811 and to support the other side of the punching part 830 And an extension frame 814 extends downward in the lower portion.

The driving motor 813 is connected to the conveying roller 811 and generates a driving force and supplies the driving force to the conveying roller 811. The driving motor 813 rotates by forming a rotary shaft 815 connected to the wall or other frame.

That is, the driving motor 813 can form a rotation shaft 815 connected to the wall for rotating the conveying roller 811 by the elastic force of the elastic portion 840.

The extension frame 814 extends downward from the lower portion of the bearing 812 and is provided with an elastic portion 840 in a space between the extension portion 814 and the wall or other frame.

The belt 820 surrounds the conveying roller 810 in the forward and backward direction and rotates in accordance with the rotation of the conveying roller 810 to convey the object to be conveyed in the front end direction of the conveying roller 810.

That is, the belt portion 820 can assist the conveyance of the object to be crushed in addition to the conveyance of the crushed material along with the rotation of the conveying roller portion 810.

6, a plurality of through holes 831 (see FIG. 6A) for inserting the conveying rollers of the conveying roller portion 810 are formed on one side of the fence portion 830, Are formed in correspondence with the intervals of the conveying rollers.

At this time, the belt portion 820 located above the transporting roller 811 is positioned above the transporting roller 811 exposed outside the fusing portion 830 (i.e., the upper side of the finsportion 830) And the belt portion 820 located below the transporting roller 811 is positioned below the transporting roller 811 inserted inside the fusing portion 830 (that is, the lower side of the fusing portion 830) (See FIG. 5).

This causes the object to be dropped falling below the conveying roller 811 to be pulled down to the central portion of the conveying roller portion 810 by the fence portion 830, It can be prevented from being damaged by being broken down into the second opening 820.

Referring to FIG. 6, the fins 830 may include a first panel 832, a second panel 833, a third panel 834, and a plurality of through holes 831.

The first panel 832 forms a wall on one side of the fins 830 and a bearing 812 is provided on the lower side in correspondence to the installation position of the conveying roller 811 and a second panel 833 is provided on the upper side, Is extended.

The second panel 833 extends downward from the top of the first panel 832 to form a wall on the other side of the fins 830.

At this time, the interval between the first panel 832 and the second panel 833 may be 10 ° to 90 °, for example, 45 °.

The third panel 834 is extended from the other side of the second panel 833 and forms a plurality of through holes 831 for inserting the conveying roller 811.

4 and 5, the object to be conveyed by the conveyance unit 800 is conveyed by the rotation of the conveyance unit 800 and the belt unit 820, and when the material falls downward as described above It is possible to prevent the belt 820 from being caught by the conveying roller 811.

The elastic portion 840 is provided between the extension frame 814 of the conveying roller portion 810 and the wall to absorb the impact applied to the conveying roller portion 810 or the fence portion 830.

The specific configuration of the elastic portion 840 will be described later with reference to FIG.

Fig. 7 is a view for explaining the elastic portion of Fig. 5; Fig.

7, the elastic portion 840 includes a first fastening portion 841, a case portion 842, an extension portion 843, a shock buffer 844, and a second fastening portion 845 .

The first fastening portion 841 is formed of a steel material such as a rectangular steel plate and is fastened to the elongate frame 814 or the wall by fastening means (for example, bolts, anchor bolts, etc.) Is fixedly installed.

The case 842 is formed in a cup shape having an open bottom and is formed at the lower end of the first coupling part 841 and penetrates in the vertical direction to form an extension part 843, a shock buffer 844 And the extending portion 843 reciprocates vertically through the through hole opened to the lower end and the through hole is formed to be narrower than the engaging jaw formed at the lower end of the extending portion 843 so that the extending portion 843 escapes prevent.

The extension portion 843 is inserted into the case portion 842 and the upper portion is fixedly fixed to the lower end of the first fastening portion 841 And a shock buffer 844 is formed at the lower end (that is, the lower part of the latching jaw).

In one embodiment, the extension 843 is preferably formed of an insulating material to prevent heat exchange.

The shock buffer 844 is inserted into the lower space of the extension portion 843 inserted in the case portion 842 so as to buffer the impact from the conveyance roller portion 810 or the fence portion 830.

 The shock absorbing portion 844 is formed between the extension portion 843 and the second engagement portion 845 and inserted into the case portion 842 to alleviate the impact from the extension frame 814.

In one embodiment, the shock buffer 844 includes a strut 8441 and an elastic portion 8442.

The stretching portion 8441 is formed with a predetermined length (for example, 10 cm or 30 cm) between the extending portion 843 and the second fastening portion 845 and the extending portion 843 is formed by the second fastening portion 845 in a space between the extension portion 843 and the second fastening portion 845 so as to be prevented from approaching within a predetermined distance.

In one embodiment, the strut 8441 is preferably formed of a cylindrical, rigid material (e.g., steel or reinforced plastic).

In one embodiment, the strut 8441 comprises a first strut 8441-1. A plurality of second strands 8441-2 and a plurality of third strands 8441-3.

The first strut part 8441-1 includes: The upper portion is inserted into the inner space of the elastic portion 8442 and the upper portion is fixed to the underside of the extension portion 843 and the extension portion 843 and the second coupling portion 845 are inserted to a predetermined length Or 30 cm or the like) to prevent the extension portion 843 from approaching within a predetermined distance (for example, 10 cm or 30 cm, etc.) from the second fastening portion 845.

The second stretching part 8441-2 is formed to have a shorter length (for example, 8cm or 25cm) than the first stretching part 8441-1 and is positioned along the outer surface of the elastic part 8442, Is fixed to the lower side of the extension portion 843.

The third supporting portion 8441-3 is formed to have a shorter length than the second supporting portion 8441-2 (for example, 5cm or 20cm), and the second supporting portion 8441-2 and the second supporting portion 8441-2, And the upper portion is fixed to the lower side of the extending portion 843 after being inserted into the empty space between the supporting portions 8441-2.

In one embodiment, the first strut 8441-1, the second strut 8441-2, and the third strut 8441-3 have different diameters, but the first strut 8441-2, 8441-1 are formed to have a diameter larger than the diameter of the second strut 8441-2 and the diameter of the second strut 8441-2 is formed to be larger than the diameter of the third strut 8441-3 .

In one embodiment, the strut 8441 includes a plurality of means for deformation (i.e., a first strut 8441-1, a plurality of second struts 8441-2, and a plurality of third struts 8441-1, 8441-3) absorbs the impact in a plurality of steps, thereby making it possible to have a more improved shock absorbing capability.

In one embodiment, when the impact is applied to the first strut 8441-1 and the second strut 8441-2 having different crushing thresholds above the respective threshold values, the strut 8441 sequentially applies an impact After the first strut 8441-1 is crushed to be absorbed, the second strut 8441-2 can be crushed.

The elastic portion 8442 is formed of a material having elasticity and is inserted into the space between the extension portion 843 and the second fastening portion 845 so as to absorb the impact from the extension frame 814. [

The second fastening portion 845 is fixed to the lower side of the case portion 842 so as to cover the lower opening portion of the case portion 842 and is then fastened to the wall or the extension frame 814.

When the elongated frame 814 does not rotate, the elastic portion 840 having the above-described configuration is extended in the vertical direction as shown in Fig. 8, and the elongated length is maintained to be the longest. When it is rotated, as shown in FIG. 9, it will be partially contracted and its length will be reduced.

Further, when the extension frame 814 is rotated beyond the fracture threshold of the support portion 8441, the first support portion 8441-1 having the highest height is crushed and primarily absorbed by the impact, 9, when the impact is not completely absorbed by the crushing of the crushing part 8441-1, a plurality of second crushing parts 8441-2 and a plurality of third crushing parts 8441-3 In turn, it absorbs all of the extra impact as it is shredded.

The hammer crusher 10 having the above-described structure can effectively prevent the breakage of the respective components by applying more force to the hammer crusher 10 than necessary by efficiently cushioning the impact using the elastic portion 840.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. You will understand.

10: hammer crusher 100:
110: mounting groove 200: hopper part
300: rotor section 400: crushing section
500: protection unit 600: driving unit
700: drive control unit 710:
720: protective sheet portion 730: display portion
740: control unit 800:
810: Feed roller unit 811: Feed roller
812: Bearing 813: Drive motor
814: Extension frame 815:
820: Belt portion 830: Fence portion
831: through hole 832: first panel
833: second panel 834: third panel
840: elastic part 841: first fastening part
842: Case portion 843: Extension portion
844: shock buffer 8441:
8442: elastic part 845: second fastening part

Claims (2)

A main body forming an inner space for crushing the crushed material;
A hopper part formed at an upper side of the main body part to inject the object to be crushed into the internal space of the main body part; And
And a rotor part formed in a cylindrical shape and installed in an internal space of the main body part and rotated by receiving a driving force,
Further comprising a transfer unit (600)
The transport unit 600 transports the size of the object to be transported to the main body 100 by classifying the size of the object to be transported according to the transport distance,
The conveying unit 600 includes a conveying roller unit 610, a belt unit 620, a fusing unit 630, and a shock absorbing unit 640,
The conveying roller unit 610 includes a plurality of conveying rollers 611-1 to 611-N which are provided so as to be longer from the rear end to the front end and to widen the interval between the conveying rollers 611-1 to 611- And is formed in a symmetrical structure,
The conveying roller portion 610 includes a conveying roller 611, a bearing 612, a driving motor 613, and an extension frame 614,
The conveying roller 611 is connected to the driving motor 613 and is driven by the driving motor 613
The paper is conveyed in the forward direction of the conveying roller portion 610 while being rotated by the driving force,
The bearing 612 is installed on one side of the conveying roller 611 connected to the driving motor 613 and rotates while supporting the conveying roller 611 and supports the other side of the punching part 630 An elongated frame 614 extending downward,
The driving motor 613 is connected to the conveying roller 611 and generates a driving force,
And supplies it to the transfer roller 611. The rotary shaft 615 connected to the wall or the frame is formed at the lower part of the rotary shaft,
The extension frame 614 extends downward from the bottom of the bearing 612
An impact absorbing portion 640 is installed in a space between the wall and the frame,
The belt portion 620 is provided to cover the conveying roller portion 610 in the forward and backward direction and rotates corresponding to the rotation of the conveying roller portion 610 to convey the object to be conveyed in the front end direction of the conveying roller portion 610 ,
A plurality of through holes 631 for inserting the conveying roller of the conveying roller portion 610 are formed on one side of the fins 630 in the form of a panel having a cross section of " And the belt portion 620 located above the conveying roller 611 is formed in correspondence to the upper side of the conveying roller 611 exposed in the outer side of the fusing portion 630 And the belt portion 620 located below the feed roller 611 is positioned below the feed roller 611 inserted inside the fins portion 630 In addition,
The fins 630 include a first panel 632, a second panel 633, a third panel 634 and a plurality of through holes 631, A bearing 612 is provided on the lower side in correspondence to the installation position of the conveyance roller 611 and an upper portion of the second panel 633 is extended to the upper side,
The second panel 633 extends downward from the upper portion of the first panel 632 to form a wall on the other side of the fins 630,
The third panel 634 extends from the other side of the second panel 633,
A plurality of through holes 631 for inserting the rollers 611 are formed.


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