JP2007196178A - Mixer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mixer which can adjust a blade angle of a mixing blade easily and surely. <P>SOLUTION: An arm 8 with a mixing blade 7 is installed to be penetrated mixing shafts 3, 3'. Then, the arm 8 has a gear 10 and also a baffle implement 11, which is engaged with the gear 10 to prevent the arm 8 from moving around its shaft, is fastened to the mixing shafts 3, 3'. Then, when the blade angle of the mixing blade 7 is adjusted, a fixation of the arm 8 is released to pull out the arm 8 a little, and the arm 8 is pivoted around its shaft to adjust the blade angle of the mixing blade 7, thereafter the arm 8 is inserted into the mixing shafts 3, 3' while the gear 10 of the arm 8 and the baffle implement 11 are engaged, and a nut 9 is screwed to prevent the arm 8 from falling out. This can easily adjust the blade angle of the mixing blade 7 in one pitch unit of gears of the gear 10 installed to the arm 8. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mixer that stirs and mixes various materials, and more particularly, to a mixer that can accurately adjust the blade angle of a mixing blade.

  As a mixer that forcibly stirs and mixes various materials, there is a mixer in which a plurality of arms each provided with mixing blades are radially attached to a mixing shaft that is rotatably disposed in a mixing tank at predetermined intervals. For example, in a mixer that produces ready-mixed concrete, two mixing shafts that rotate in opposite directions are arranged in parallel in a mixing tank, and an arm with mixing blades attached to the mixing shaft is slightly spaced in the circumferential direction at a predetermined interval. The material is moved spirally and moved across the entire mixing tank while feeding it up and down and left and right by a mixing blade with a predetermined rake angle and soot angle. There is what is kneaded (see Patent Document 1).

By the way, this kind of mixer is applied not only for the above-mentioned production of ready-mixed concrete but also for mixing various materials by variously changing the mixing capacity, the number of mixing blades, the arrangement of mixing blades, and the like.
Japanese Patent Laid-Open No. 11-221819

  However, in a mixer that is developed when mixing new materials, the angle of the mixing blade that exerts the screw effect and shearing action may be optimally adjusted while observing the actual mixing results. In the conventional mixer, it is not assumed that the blade angle of the mixing blade is appropriately changed, and the structure cannot be adjusted accurately.

  In view of the above points, an object of the present invention is to provide a mixer that can easily and accurately adjust the blade angle of a mixing blade.

  In order to solve the above-described problems, a mixer according to the present invention is a mixer in which a plurality of arms each provided with mixing blades are rotatably mounted on a mixing shaft that is rotatably disposed in a mixing tank. The shaft is passed through the mixing shaft and its base end is fastened with a fastener to prevent it from coming off, and a gear is attached to the arm and meshed with the gear to prevent rotation about the arm axis. It is characterized in that the tool is fixed to the mixing shaft.

  According to the mixer according to the present invention, in the mixer in which a plurality of arms provided with mixing blades are radially attached to the mixing shaft rotatably disposed in the mixing tank at predetermined intervals, the arms are passed through the mixing shaft. The base end of the arm is fastened with a fastener to prevent it from coming off, and a gear is attached to the arm, and a rotation stopper that engages with the gear and prevents rotation about the axis of the arm is fixed to the mixing shaft. Since the blade angle of the mixing blade can be positioned by meshing the gear mounted on the arm and the rotation stopper, the blade angle of the mixing blade can be adjusted in units of one pitch of the gear teeth mounted on the arm. It is possible to adjust the blade angle easily and accurately.

  In the mixer according to the present invention, a through-hole for penetrating and mounting an arm provided with mixing blades is provided at a predetermined position of the mixing shaft, and a gear for blade angle positioning is provided on the arm. At the same time as mounting, when the arm is inserted through the mixing shaft, a detent that engages with the gear of the arm and prevents rotation about the axis of the arm is fixed to the mixing shaft.

  Then, after inserting the base end portion of the arm provided with the mixing blade partway into the through hole of the mixing shaft, the arm is rotated and adjusted around the axis so that the mixing blade has a desired blade angle. When the angle is determined, the arm is inserted into the through-hole of the mixing shaft and penetrated while meshing the gear of the arm with the rotation stopper fixed to the mixing shaft. Then, the base end portion of the arm protruding from the through hole of the mixing shaft is fastened with a fastener to prevent the removal and complete the attachment.

  Also, when changing the blade angle of the mixing blade, remove the fastener that secures the arm, pull out the arm a little, release the meshing between the arm gear and the rotation stopper, and then rotate the arm appropriately around the axis After adjusting the blade angle of the mixing blade and determining the blade angle, after inserting the arm into the through-hole of the mixing shaft and penetrating the arm while engaging the gear of the arm and the rotation stopper, as described above Fasten with fasteners to prevent slipping.

  As described above, the gear mounted on the arm provided with the mixing blade and the rotation stopper fixed to the mixing shaft are meshed so that the arm is positioned, so that one gear pitch unit of the gear mounted on the arm is used. Thus, the blade angle of the mixing blade can be adjusted.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  In the figure, 1 is a mixer for stirring and mixing various mixed materials, and two parallel mixing shafts 3 and 3 'are horizontally penetrated through a mixing tank 2 composed of two twin cylinders. A bearing 4 fixed to the tank 2 is rotatably supported. Then, a drive motor (not shown) and the gear 5 are connected by a chain, and the gear 5 is rotated by driving the drive motor, and the mixing shafts 3 and 3 'are rotated in synchronization with the meshing of the gears 6 and 6'. Yes.

  On the mixing shafts 3 and 3 ', an arm 8 having a mixing blade 7 that rotates along the inner wall of the mixing tank 2 and stirs and mixes the mixed material staying in the mixing tank 2 is arranged in the axial direction at predetermined intervals. The mixing material is circulated in the mixing tank 2 while being mixed with the mixing blades 7 while being sent out in opposite directions along the axis of the mixing shafts 3, 3 ′.

  The arm 8 provided with the mixing blade 7 passes through the mixing shafts 3 and 3 ′, and a nut 9 as a fastener is screwed to a screw portion at a base end portion thereof to prevent the arm 8 from coming off. Further, a gear 10 is mounted and fixed to the arm 8, and a detent 11 that forms the same tooth profile as the gear 10 and meshes with the gear 10 to prevent the arm 8 from rotating is mixed by a bolt 12. The shafts 3 and 3 'are fixed.

  Next, the blade angle adjustment of the mixing blade 7 of the mixer 1 will be described. First, the nut 9 for fixing the arm 8 provided with the mixing blade 7 is removed, the arm 8 is pulled out a little to release the engagement between the gear 10 of the arm 8 and the rotation stopper 11, and then the arm 8 is rotated about its axis. The blade angle of the mixing blade 7 is adjusted by moving. When the blade angle is determined, the arm 8 is inserted while meshing the gear 10 of the arm 8 and the rotation stopper 11, and the threaded portion of the base end of the arm 8 protruding from the mixing shafts 3 and 3 '. The nut 9 is screwed to the end to prevent it from coming off.

  In this way, the arm 3 is positioned by meshing the gear 10 mounted on the arm 3 having the mixing blade 7 with the rotation stopper 11 fixed to the mixing shaft 3, 3 ′. The blade angle of the mixing blade 7 can be adjusted in units of one pitch of the teeth of the gear 10 attached to the blade 10, and the blade angle can be adjusted easily and accurately.

It is a top view which shows one Example of the mixer which concerns on this invention. It is an AA arrow line view of FIG. It is an enlarged view of the connection part of an arm and a mixing shaft, and its top view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Mixer 2 ... Mixing tank 3, 3 '... Mixing shaft 7 ... Mixing blade 8 ... Arm 9 ... Nut (fastener)
10 ... Gear 11 ... Anti-rotation tool

Claims (1)

  In a mixer in which a plurality of arms equipped with mixing blades are mounted on a mixing shaft that is rotatably arranged in a mixing tank and radially radiated at a predetermined interval, the arms are passed through the mixing shaft and the base end thereof is fastened by a fastener. The mixer is characterized in that a gear is attached to the arm, and a detent that is engaged with the gear and prevents rotation about the axis of the arm is fixed to the mixing shaft.

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