JPH0422609B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a rod-shaped vibrator used for kneading concrete raw materials and the like.

(Prior art) Conventionally, a two-shaft forced mixing mixer is known in which concrete is manufactured by mixing and turning concrete materials using paddles attached to two horizontal rotating shafts arranged in the mixer body in order to knead concrete raw materials. However, no vibrations were applied to the concrete raw materials being mixed.

Further, as shown in FIG. 4, during concrete work, the base end of the vibrating tube 21 is connected to a motor 23 by a flexible shaft 22 to generate vibrations in the vibrating tube, and the vibrating tube 21 is thrust into fresh concrete to impart vibration. Rod-shaped vibrators are also known.

(Problems to be Solved by the Invention) However, in the above-mentioned prior art, there was a problem in that the properties of concrete could not be improved to the maximum by mechanical mixing alone using a two-axis forced mixing mixer.

Also, for the latter, a vibrating cylinder is plunged into fresh concrete,
This device quickly compacts and fills fresh concrete by expelling excess air caught in the concrete and tightly bonding cement and aggregate through a water film.It vibrates conically around the base. However, there was a problem in that it was not possible to effectively apply vibration to the entire fresh concrete being mixed.

(Means for Solving the Problems) The present invention aims to solve the above problems, and provides a two-shaft forced kneading mixer in which paddles are attached to two horizontal rotating shafts arranged in the mixer body. , a rod-shaped vibrator in which a rod-shaped eccentric weight with a notch in the middle part along the axial direction is housed in an outer cylinder is installed in the two parts in the body.
The vibrator is placed at the center of the outside of the paddle's rotation path on the book's horizontal axis of rotation, and is supported by a donut-shaped elastic bearing member made of an elastic material such as rubber inside a bearing casing provided at both ends of the mixer body. It is characterized by the fact that

(Example) Hereinafter, a detailed explanation will be given based on the illustrated example. Reference numeral 1 designates a body of a two-shaft mixer, in which two rotating shafts 2 and 3 are arranged, arms 4 and 5 are protruded from each other, and paddles 6 and 7 are attached to the tips of the arms 4 and 5, respectively.
A specially designed rod-shaped vibrator 8 is located in the center of the outer lower part of the rotation locus of the paddles 6 and 7, parallel to the rotation axes 2 and 3.
are arranged. 9 is a motor for driving the rotating shafts 2 and 3; 10 is a vibration motor; a flexible shaft 11 is connected to the rod-shaped vibrator 8; 12 is a gate attached to the bottom of the mixer body 1 so as to be openable and closable. Reference numeral 8 designates a rod-shaped vibrator, in which a rod-shaped eccentric weight 8b with a notch 8a formed in the middle part is housed in an outer cylinder 8c, and rubber or other material is placed inside bearing casings 13 and 14 whose both ends are fixed to the outer surface of the mixer body 1. It is supported by donut-shaped elastic bearing members 15 and 16 made of elastic material.

Next, the effect will be explained. When concrete raw materials are put into the mixer body 1 and the rotating shafts 2 and 3 are rotated as shown by the arrows, the mixed concrete raw materials form a mountain shape as shown by the dashed-dotted line due to the rotational action of the paddles, and move one after another to the center of the lower part. It comes into contact with the vibration area of a rod-shaped vibrator placed on the shaft, and receives vibration over its entire axial length. Concrete raw materials subjected to vibration have particularly well-dispersed cement particles, and moisture adheres evenly to the surface of these particles, which almost completely loosens the floc between cement and water, promotes fluidization of concrete, and prevents slump. Promotes elongation. Therefore, the impact applied to the paddle during kneading is reduced, and the turning operation using the paddle can be easily performed.

(Effects) According to the present invention, in a two-shaft forced kneading mixer in which paddles are attached to two horizontal rotating shafts disposed in the mixer body, a rod-shaped eccentric weight with a notch in the middle part along the axial direction is removed. A rod-shaped vibrator housed in a cylinder is placed at the center of the lower part of the outside of the rotation trajectory of the paddles of the two horizontal rotation axes in the mixer body, and this vibrator is mounted inside a bearing housing provided at both ends of the mixer body with rubber, etc. Since it is supported by a donut-shaped elastic bearing member made of an elastic body, the notch provided in the shaft of the bar-shaped vibrator allows the amount of eccentricity with respect to the shaft center to be made larger at the ends that are constrained by the bearing and smaller at the center. can.

In addition, by supporting the restrained end with an elastic member such as rubber and rotating it, it is possible to generate relatively uniform vibrations over the entire length of the vibrator, which adds uniform vibration to the kneaded material in the mixer. can do.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view of a vibrating two-shaft forced mixing mixer according to an embodiment of the present invention, Fig. 2 is a sectional view of the same side, and Fig. 3 is a cutaway front view of essential parts of an embodiment of the present invention. FIG. 4 is a perspective view of a conventional rod-type vibrator. DESCRIPTION OF SYMBOLS 1... Mixer body, 8... Rod-shaped vibrator, 13, 14... Bearing housing, 15, 16... Donut-shaped elastic bearing member.

Claims (1)

[Claims] 1 In a two-axis forced kneading mixer with paddles attached to two horizontal rotating shafts arranged inside the mixer body, a rod-shaped vibrator with a rod-shaped eccentric weight with a notch cut out along the axial direction in the middle part housed in the outer cylinder. The corresponding 2 in the fuselage
The vibrator is placed at the center of the outside of the paddle's rotation path on the book's horizontal axis of rotation, and is supported by a donut-shaped elastic bearing member made of an elastic material such as rubber inside a bearing casing provided at both ends of the mixer body. A rod-shaped vibrator device.