JP2003305354A - Discharge gate for mixer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a discharge gate for a mixer which closes the discharge gate without any gap by eliminating stuck materials on the surrounding part of the discharge gate as a gate lid closes. <P>SOLUTION: Wear-resistant rubber plates 11, 12 are adhered fixedly on the surrounding part of the discharge gate 7 and the gate lid 8 of the mixer. The surrounding parts of the discharge gate 7 and the gate lid 8 are formed slantingly so that the stuck materials are scraped on the surrounding part of the gate lid 8 in the course of closing action of the gate lid 8 and that the scraped materials are pressed into a mixing chamber 2. In the course of closing action of the gate lid 8, the surrounding part of the gate lid 8 slides along the surface of the surrounding part of the discharge gate 7 and is pressed gradually. As a result, the stuck materials on the surrounding part of the discharge gate 7 are completely scraped by receiving a strong shear action and the discharge gate 7 is surely closed by the compacting effect of the elastic rubber plates 11, 12. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge gate of a mixer for charging and mixing various materials and, more particularly, to a discharge gate of a mixer having excellent sealing performance when closed. . 2. Description of the Related Art Mixers are generally used for mixing and adjusting various materials. For example, in the case of producing ready-mixed concrete, concrete materials such as gravel, sand, cement, and an admixture are put into a biaxial mixer or the like together with water and mixed and stirred for a predetermined time to prepare ready-mixed concrete. ing. When the ready-mixed concrete is mixed, rotate the gate cover that closes the discharge gate at the bottom of the mixing tank, open the discharge gate to discharge the ready-mixed concrete in the mixing tank, and then move the gate lid back to the original position. The door is turned to fit into the discharge gate and closed to prepare for the next production of ready-mixed concrete. [0003] However, the mixture of the mixture, such as ready-mixed concrete, is discharged to the periphery of the discharge gate immediately after the mixture is discharged, and the gate is not removed without removing the mixture. If the lid is to be closed, of course, there is a risk that material will be trapped between the discharge gate and the gate lid, resulting in insufficient sealing, and in the worst case material leakage during mixing. there were. Also, there is a method of cleaning the periphery of the discharge gate every time the mixture is discharged, but it is not uncommon for shipping speed to be required as in the case of producing ready-mixed concrete, and it is also extremely troublesome, In practice, it is difficult to adopt it. SUMMARY OF THE INVENTION In view of the above, the present invention provides a mixer discharge gate capable of removing deposits on the periphery of the discharge gate and closing the discharge gate without gaps with the closing operation of the gate lid. Make it an issue. According to the present invention, in order to solve the above-mentioned problems, a discharge gate for discharging a mixture is opened at the bottom of a mixing tank of a mixer, and a pivot is provided on a side edge of the discharge gate. In a discharge gate of the mixer configured to open and close the discharge gate with a freely disposed gate lid, at least one of the peripheral edges of the discharge gate and the gate lid includes a wear-resistant elastic material, With the gate lid closing operation, the peripheral edge of the discharge gate and the gate lid have an inclined structure so that the adhering material on the peripheral edge of the discharge gate is scraped off at the peripheral edge of the gate lid and pushed into the mixing tank. And According to the discharge gate of the mixer of the present invention, the mixture is discharged from the discharge gate opened by rotating the gate cover, and then the gate cover is rotated again to the original position. When closing the discharge gate, the peripheral edge of the inclined gate lid is closed along the surface of the similarly inclined inclined discharge gate while gradually sliding. For this reason, the mixture adhering to the peripheral edge of the discharge gate is strongly sheared by the peripheral edge of the gate lid, and is scraped and pushed all the way into the mixing tank. Therefore, when the closing operation of the gate lid is completed, all the deposits have been removed and there is no biting or the like, and in addition, the exhaust gate and the abrasion-resistant elastic material provided on at least one of the peripheral edges of the gate lid are used. The discharge gate is reliably closed by the compaction effect. As described above, although the structure is extremely simple, it is possible to completely remove the deposits on the periphery of the discharge gate only by closing the gate cover after the discharge of the mixture. And there is no danger that the mixture will leak during mixing. An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 denotes a biaxial mixer used for producing a ready-mixed concrete by mixing and adjusting concrete materials such as gravel, sand, cement, and an admixture with water. The two parallel mixing shafts 3, 3 ′ penetrate into a mixing tank 2 composed of a body, and are rotatably supported by bearings (not shown) fixed to the mixing tank 2, and a driving motor (not shown) ), The mixing shafts 3 and 3 'are rotated in the directions indicated by arrows in the figure. A plurality of arms 4 are radially arranged on the mixing shafts 3 and 3 ', and a blade 5 for mixing and granulating the material is screwed to a tip of the arm 4 with a fixing bolt 6. are doing. In this embodiment, a two-axis mixer will be described as an example of a mixer. However, the present invention is not limited to this. For example, a single-axis mixer can be used. In the center of the bottom of the mixing tank 2, mixing shafts 3, 3
The discharge gate 7 for discharging the mixture is opened in parallel with the line ′, and a gate lid 8 that is fitted into the discharge gate 7 and closes the discharge gate 7 is rotatably arranged on the side edge of the discharge gate 7. In response to the expansion and contraction of a piston rod of a cylinder (not shown) provided near the gate lid 8, the gate lid 8 is rotated as shown by an arrow in FIG. I am trying to do it. On the other hand, wear-resistant liners 9 and 9 ′ are adhered to the inner wall of the mixing tank 2, and a mountain-shaped liner 10 is also fixed to the upper part of the gate lid 8. Abrasion-resistant rubbers 11 and 12 each having a predetermined thickness are sandwiched between the liner 9 ′ and the gate lid 8 and the liner 10, respectively. 11 and the edge of the abrasion resistant rubber 12 appears on the periphery of the gate lid 8. The peripheral edges of the discharge gate 7 and the gate lid 8 have an inclined structure as can be seen from the enlarged sectional view of FIG. 7, while being slid along the surface of the peripheral portion, and gradually pressed. Thus, in the two-axis mixer 1, for example, after mixing and adjusting various concrete materials with water to produce ready-mixed concrete, the gate lid 8 is opened to open the discharge gate 7 to prepare the ready-mixed concrete. The concrete is discharged, and the gate lid 8 is closed without any cleaning work. At this time, a portion of the ready-mixed concrete adheres to the periphery of the discharge gate 7 due to the discharge of the ready-mixed concrete, but with the closing operation of the gate lid 8, the periphery of the gate lid 8 becomes By sliding along the surface and gradually pressing, the ready-mixed concrete adhering to the periphery of the discharge gate 7 is scraped off by the strong shearing action, and the scraped off adhering matter is mixed. It is pushed into the inside of the tank 2. Thus, the gate lid 8
When the closing is completed, the fresh concrete or the like does not bite into the gap between the peripheral edge of the discharge gate 7 and the peripheral edge of the gate lid 8, and in addition, the abrasion resistant rubber 11, 1
2, the sealing effect can be reliably achieved. As described above, even if a portion such as the ready-mixed concrete is adhered to the periphery of the discharge gate 7 when the mixture such as ready-mixed concrete is discharged, the discharge gate 7 is automatically closed with the closing operation of the gate lid 8 after the ready-mixed concrete is discharged. Since the peripheral portion of the discharge gate 7 is cleaned, the seal between the discharge gate 7 and the gate lid 8 can be surely achieved without any additional cleaning work, and the discharge gate 7 and the gate are mixed during the next mixing of the ready-mixed concrete. There is no possibility that the concrete material leaks from the gap with the lid 8. In addition, since the structure is very simple, it can be implemented at low cost and can be easily modified for an existing device. In this embodiment, the abrasion-resistant rubbers 11 and 12 are provided between the mixing tank 2 and the liner 9 ', respectively.
And it was made to be clamped between the gate lid 8 and the liner 10, but it is not always necessary to do so, for example,
Abrasion-resistant rubber may be directly fixed to the peripheral surface of the liners 9 ′ and 10. In the present embodiment,
Rubber is used as the wear-resistant elastic material, but the material is not limited to this.For example, a high-molecular resin having elasticity may be used. Good. Although the present embodiment has been described based on the discharge gate of the mixer for producing ready-mixed concrete, the present invention is not limited to this, and the discharge of the mixer for mixing and adjusting any mixture such as, for example, polymer materials and foodstuffs is described. The same can be applied to the gate. As described above, according to the discharge gate of the mixer of the present invention, a discharge gate for discharging a mixture is opened at the bottom of the mixing tank of the mixer, and the discharge gate is rotatable around a side edge of the discharge gate. A discharge gate of a mixer configured to open and close the discharge gate with a gate lid disposed at a gate cover, wherein at least one of the discharge gate and a peripheral edge of the gate cover is provided with a wear-resistant elastic material, and With the closing operation of the lid, the discharge gate and the peripheral edge of the gate lid have an inclined structure so that the deposits on the peripheral edge of the discharge gate are scraped off and pushed into the mixing tank at the peripheral edge of the gate lid. It is possible to completely remove the deposits on the periphery of the discharge gate only by the closing operation of, and to securely close the discharge gate without performing a separate cleaning operation or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing one embodiment of a mixer according to the present invention. FIG. 2 is an enlarged view of a main part of FIG. FIG. 3 is a diagram corresponding to FIG. 2 of a conventional mixer. [Description of Signs] 1—Mixer 2—Mixing tank 7—Discharge gate 8—Gate lids 11 and 12—Abrasion resistant rubber

Claims (1)

Claims: 1. A discharge gate for discharging a mixture is opened at the bottom of a mixing tank of a mixer, and the discharge gate is rotatably disposed on a side edge of the discharge gate. In the discharge gate of the mixer configured to open and close, at least one of the discharge gate and the peripheral edge of the gate lid is provided with an abrasion-resistant elastic material, and the peripheral edge of the gate lid along with the closing operation of the gate lid. A discharge gate of a mixer, wherein the discharge gate and the peripheral edge of the gate cover have an inclined structure so as to scrape off the deposits on the peripheral edge of the discharge gate and push it into the mixing tank.