JP4295080B2 - Shaker - Google Patents

Description

  The present invention relates to a shaker that stirs and mixes samples in, for example, physics and chemistry experiments.

As a shaking machine that puts two or more kinds of mutually insoluble liquids in a shaking funnel such as a separatory funnel, shakes the shaking container, mixes and shakes the liquid, and extracts and concentrates the target substance into one liquid. A so-called vertical shaker is known that shakes the plate up and down. This vertical shaker has a built-in drive motor and a crank mechanism that converts the rotational motion of the drive motor into a reciprocating motion in a casing, and a shaking plate can be moved in a vertical direction on a guide member provided on a side surface of the casing. The shaking plate is reciprocated in the vertical direction via a connecting rod connected to the crank mechanism. The shaking vessel is attached to a shaking vessel holder attached to the shaking plate, and the shaking plate is rotated by the rotation of the drive motor. Is reciprocated in the vertical direction along the side surface of the casing to shake the liquid in the shaking container (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 58-161629

  However, in the above-described vertical shaking, each liquid in the shaking container is affected by upward kinetic energy due to the rising of the shaking plate and the influence of gravity when descending, and when the speed of the shaking plate becomes higher than a certain level, A speed difference is created between the movement of the liquid and the mechanically reversing shaking container, and each liquid is in a stirring state. However, since the contact area of each liquid is small, the stirring force is small and the extraction of the target substance is performed. It took time to. For example, according to the experiment by the present applicant, it took 26 minutes to put 250 ml of an acetic acid aqueous solution and 250 ml of ethyl acetate into an infiltration container and extract acetic acid with ethyl acetate at a shaking speed of 189 rpm. For this reason, vibration and noise during shaking lasted for a long time, and the mechanical burden was large.

  Accordingly, an object of the present invention is to provide a shaker that can shorten the shaking time to reduce vibration and noise and reduce the mechanical burden.

  In order to achieve the above-described object, the present invention incorporates a drive motor and a crank mechanism for converting the rotational motion of the drive motor into a reciprocating motion in the casing, and the shaking plate is moved up and down on the guide member provided on the side surface of the casing. In a shaker that is movably provided in a direction and reciprocates in the vertical direction via a connecting rod connected to the crank mechanism, a guide member support plate is provided on a side portion of the casing, and the guide member support The upper part of the guide member is pivotally supported by a horizontal support shaft at the upper part of the plate, and the guide member is tiltable with respect to the casing, and the guide member inclined at a desired angle is fixed to the guide member support plate. It is characterized by providing a fixing means.

  As described above, the present invention can be shaken by tilting the shaking plate by tilting the guide member, so that the contact area of each liquid in the tilted shaking container becomes wider than the vertical state, The liquid receives the force of the combined movement of the vertical force due to gravity and the horizontal force due to the product of the amplitude and tilt angle of the shaking plate, and the liquid interface is disturbed by the frictional motion with the inner wall of the shaking vessel, Each liquid is in a stirring state from the low speed stage, and the stirring force becomes larger than that in the vertical shaking, and the shaking time can be shortened to reduce vibration and noise, and to reduce the mechanical burden. Moreover, even if the shaking speed is reduced to 2/3 of the conventional method, the same degree of shaking effect can be obtained. In this case, extremely quiet operation is possible, and mechanical wear can be reduced and power can be saved. .

  Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. The shaker 1 includes shake plates 3 on both side surfaces of the casing 2. The casing 2 includes a front plate 5 and a rear plate 6, which are erected at a central portion of the base 4 that is long in the direction of both sides of the casing 2. 5 and side frames 8, 8 provided on both side surfaces of the rear plate 6. Each side frame 8 has a vertically rectangular opening at the center, and a shaking plate support member 9 is attached to each side frame 8.

  The shaking plate support member 9 includes a frame 10 that is attached to the side frame 8 by forming a vertical rectangular opening at the center, and a guide member support that is provided on both sides of the frame 10 and expands downward. The lower end of each guide member support plate 11 is fixed to the base 4. The front plate 5 is provided with a recess 12 for installing an operation panel, and the top plate 7 is provided with a carrying handle 13 near the front plate 5 and the rear plate 6.

  In the casing 2, a drive motor 15 is installed on the rear plate 6 side, and a crank mechanism 17 is disposed on a mount 16 installed in an intermediate portion between the front plate 5 and the rear plate 6. The crank mechanism 17 converts the rotation of the drive motor 15 into a reciprocating motion, and supports two shafts 18 and 18 arranged on both sides of the casing 2 by bearings 19 and 19 of the gantry 16. In addition, the inner end side of each shaft 18 is coupled by a coupling 20, and a belt 23 is stretched between the pulley 21 of one shaft 18 and the pulley 22 of the output shaft of the drive motor 15. A disk 24 is fixed on each outer end side, and an eccentric shaft 25 is provided on each disk 24. Each shaft 18 is provided with a balance mass 26 at a position facing the eccentric shaft 25 to reduce vibrations caused by the eccentric motion during rotation of each disk 24.

  Each eccentric shaft 25 is connected via a spherical bearing 28 to a lower portion of a connecting rod 27 that reciprocates the shaking plate 3 in the vertical direction. The upper part of the connecting rod 27 is connected to the upper part of the back plate 30 of the shaking plate 3 through the spherical bearing 29 at the opening portions of the side frame 8 and the frame body 10.

  Each guide member support plate 11 is provided with a guide member 31 for guiding the shaking plate 3 so as to reciprocate in the vertical direction. The guide member 31 is a guide provided so as to be tiltable with respect to the casing 2 with the upper portion pivotally supported by horizontal pin-shaped support shafts 32, 32 provided on the guide member support plates 11, 11. A frame 33, a pair of left and right roller support brackets 34, 34 fixed to both side frames 33a of the guide frame 33, and a pair of upper and lower guide rollers 35 provided on each roller support bracket 34, 35. A gap into which the back plate 30 is inserted is formed between the guide rollers 35 and 35 and the guide frame 33.

  The guide frame 33 has a vertical rectangular opening at the center, and has side pieces 33b and 33b which are bent 90 degrees on both sides and further bent 90 degrees inward, respectively, and the roller support of the side frame 33a A guide plate 37 on which a guide roller 36 provided on the back plate 30 rolls is fixed inside the bracket 34.

  Between the guide member support plates 11 and 11 and the lower portion of the guide frame 33, there is provided a fixing means 40 for fixing the guide frame 33 that can be tilted about the support shaft 32 to a desired tilt angle. ing. The fixing means 40 includes an arc-shaped long hole 41 centered on the pin 32 formed in the guide member support plate 11, a nut 42 fixed to the guide frame 33, and the guide member support plate 11 side. And a shaking plate predetermined position fixing knob 43 provided with a bolt inserted into the long hole 41 and screwed into the nut 42. In the present embodiment, the long hole 41 is formed such that the guide frame 33 is inclined 70 degrees from the vertical state along the side surface of the casing 2, and a scale 44 with an inclination angle is written on the upper part of the long hole 41. ing.

  The back plate 30 is a frame having a vertically rectangular opening at the center, side pieces 30a and 30a bent 90 degrees on both sides, and shaking shaken 90 degrees vertically and further bent 90 degrees inside. Plate mounting pieces 30b and 30b are formed, each side piece 30a is provided with a pair of upper and lower guide rollers 36 and 36, and the spherical bearing 29 of the connecting rod 27 is connected to the frame upper part 30c. The back plate 30 is inserted into a gap between the guide frame 33 and the guide rollers 35, 35 and presses against the guide rollers 35, 35. The guide rollers 36, 36 of the back plate 30 are connected to the guide frame 33. Press contact with the guide plate 37.

  A shaking container holder 50 is attached to the shaking plate 3 by screws or the like. The shaking container holder 50 includes a vertical column 51 that is detachably attached to the shaking plate 3, a support arm 52 that is fixed to the lower end of the column 51 and supports the bottom of the shaking container, and the column 51. The holding arm 53 is provided so as to be slidable in the vertical direction and holds the upper part of the shaking container and is fixed to the support column 51.

  The shaker 1 configured as described above fixes the guide plate 33 vertically by tightening the shake plate predetermined position fixing knob 43 to the casing 2 side of the long hole 41 and operating the drive motor 15. Then, the rotation of the drive motor 15 is converted into a reciprocating motion in the vertical direction by the crank mechanism 17 and the connecting rod 27, and the shaking plate is shaken vertically like a conventional shaker. Further, if the shaking plate predetermined position fixing knob 43 is loosened, the guide frame 33 is inclined to a desired angle, the shaking plate predetermined position fixing knob 43 is tightened, and the drive motor 15 is operated, the shaking plate 3 is inclined. Shake under the condition.

  When the shaking plate 3 is shaken in the inclined state as described above, the contact area of each liquid in the shaking container becomes larger than that in the vertical state, and each liquid has a vertical force due to gravity and a shaking. It receives the force of the combined motion of the horizontal force due to the product of the amplitude of the plate 3 and the inclination angle. As a result, each liquid is disturbed at the liquid interface due to frictional motion with the inner wall of the shaking container, and each liquid is in a stirring state from the low speed stage, and the stirring force is larger than that in vertical shaking. For example, according to the experiment by the present applicant, when acetic acid aqueous solution (250 ml) and ethyl acetate (250 ml) are placed in a permeation vessel and acetic acid is extracted with ethyl acetate at a shaking speed of 189 rpm, shaking plate 3 is tilted by 70 degrees. After shaking, the amount of acetic acid in the acetic acid aqueous solution was confirmed by an electric conductivity meter. As a result, an extraction result similar to the conventional one was obtained in 6 minutes, and the shaking time was greatly shortened.

  Therefore, the transmission efficiency can be improved, and the above-described configuration can reduce vibration and noise generated during shaking, thereby reducing the mechanical burden. Moreover, even if the shaking speed is reduced to 2/3 of the conventional method, the same degree of shaking effect can be obtained. In this case, extremely quiet operation is possible, and mechanical wear can be reduced and power can be saved. .

  In addition, although the said example demonstrated the thing provided with the shaking board 3 on the both sides | surfaces of the casing 2, respectively, what provided the shaking board on one side surface may be sufficient. Moreover, although the inclination angle of the shaking plate 3 has been described in the range of 70 degrees from the vertical state, the present invention is not limited to this, and the shaking plate 3 can be further laid and inclined. Further, the guide member has been described as having a configuration in which the shaking plate 3 is reciprocated in the vertical direction by the guide rollers 35 and 36. However, the guide member is not limited to this as long as the shaking plate 3 can be reciprocated in the vertical direction. Absent.

Front view of shaker with tilting shaker plate with shake vessel holder Front view of shaker with shaking plate vertical Front view of shaker with shaking plate tilted Side view of shaker with shaking plate removed Partial cross-sectional plan view of shaker BB sectional view of FIG. 2 showing an outline of the guide member

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Shaker, 2 ... Casing, 3 ... Shaking board, 4 ... Base | substrate, 11 ... Guide member support plate, 15 ... Drive motor, 17 ... Crank mechanism, 24 ... Disk, 25 ... Eccentric shaft, 27 ... Connecting rod, 31 ... Guide member, 40 ... Fixing means, 41 ... Long hole in guide member support plate, 42 ... Nut, 43 ... Shaking plate fixed position fixed knob

Claims (1)

A drive motor and a crank mechanism that converts the rotational motion of the drive motor into a reciprocating motion are built in the casing, and a shaking plate is provided on a guide member provided on a side surface of the casing so as to be movable in the vertical direction. In a shaker that reciprocates in a vertical direction via a connecting rod connected to a crank mechanism, a guide member support plate is provided on a side portion of the casing, and the guide member is mounted on a horizontal support shaft above the guide member support plate. The guide member is provided so as to be tiltable with respect to the casing by pivotally supporting the upper portion of the casing, and a fixing means for fixing the guide member inclined at a desired angle to the guide member support plate is provided. Machine.

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