JP5903897B2 - Dust-proof cover member - Google Patents

Description

  The present invention relates to a dustproof cover member used in a powdery substance measuring apparatus that measures a physical property value of a powdery substance.

  Conventionally, physical properties such as repose angle, collapse angle, differential angle, loose apparent specific gravity, firm apparent specific gravity, compressibility, condensation degree, spatula angle, dispersion degree and uniformity of powder are measured. An apparatus for evaluating flow characteristics and the like is known (see, for example, Patent Document 1). This granular material flow characteristic measuring apparatus of Patent Document 1 is provided with the above-described measurement unit for each physical property value in one apparatus, and the measurement of each physical property value described above under a certain condition mechanically with one apparatus. Is to do.

Japanese Patent Publication No. 51-14278

  However, since the granular material flow characteristic measuring apparatus of Patent Document 1 is used in a state exposed to the atmosphere, there is a possibility that powder is scattered during measurement and the measurer sucks the powder. There is a problem that the health of the measurer may be harmed by the odor of the body.

  Then, an object of this invention is to provide the dust-proof cover member which can prevent scattering of a powdery substance effectively.

  In order to achieve the above object, the dust-proof cover member according to the present invention has a storage space in which a powdery substance measuring device for measuring a physical property value of the powdery substance can be accommodated, and suction holes and exhaust holes are formed. A box-shaped cover main body, exhaust means for exhausting the air in the accommodation space from the exhaust hole, and closure means capable of closing the suction hole, wherein the closure means is formed by the exhaust means. The suction hole is opened while the air inside is exhausted, and the suction hole is closed while the exhaust by the exhaust means is stopped.

  In the dustproof cover member according to the present invention, it is preferable that the exhaust means includes an air volume adjusting means capable of adjusting an exhaust air volume. In this case, it is preferable that the air volume adjusting means can manually adjust the exhaust air volume.

  Further, in the dustproof cover member according to the present invention, the closing means includes a plate-like closing member formed so as to cover the entire suction hole, and at least one end side of the closing member is a wall surface of the cover body. The other end side that is fixed to the one end side is moved into the accommodation space when the inside of the accommodation space is brought into a negative pressure state by the exhaust of the exhaust means, thereby forming an open state of the suction hole. It is preferable that it is comprised. In this case, the closing member has flexibility, and when the inside of the housing space is in a negative pressure state, it is bent into the housing space to form an open state of the suction hole, and the exhaust unit It is preferable that the suction hole is configured to be restored to the original shape by stopping the exhaust due to.

  Furthermore, in the dustproof cover member according to the present invention, it is preferable that the exhaust hole is formed in an upper surface of the cover body, and the suction hole is formed in a lower part of the back surface of the cover body.

  ADVANTAGE OF THE INVENTION According to this invention, the dust-proof cover member which can prevent effectively scattering of a powdery substance can be provided.

It is a front view which shows schematic structure of the dust-proof cover member which concerns on one Embodiment of this invention. It is a general | schematic fragmentary sectional enlarged view which shows the state which the closure member of the dust-proof cover member which concerns on this embodiment closed. It is a general | schematic fragmentary sectional enlarged view which shows the state which the closure member of the dust-proof cover member which concerns on this embodiment opened.

  Next, a dustproof cover member according to an embodiment of the present invention will be described based on the drawings. As shown in FIG. 1, the dust-proof cover member 1 according to the present embodiment includes a cover main body 10 having an accommodating space 12 that can accommodate the powdery substance measuring device 2, and air in the accommodating space 12 of the cover main body 10. An exhaust mechanism 20 that exhausts air to the outside of the housing space 12 and a closing member 30 that closes the suction hole 14 formed in the cover body 10 are provided. In the present embodiment, the powdery substance measuring apparatus 2 includes, for example, an angle of repose, a collapse angle, a difference angle, a loose apparent specific gravity, a firm apparent specific gravity, a degree of compression, a degree of condensation, a spatula angle, a degree of dispersion, and the like. It is a device that can measure physical properties such as uniformity, and a general-purpose measuring device that performs measurement using a powdery substance can be used.

  The cover body 10 includes a box body 10a having a front surface opened and double-open door members 10b and 10b covering the front surface of the box body 10a. The cover body 10a and the left and right door members 10b and 10b The enclosed space is configured to be an accommodation space 12 in which the powdery substance measuring device 2 is accommodated. The box 10a and the left and right door members 10b, 10b are each formed of, for example, plastic having transparency such as acrylic, transparent vinyl chloride, and transparent PET, and the inside of the accommodation space 12 is negatively pressured by the exhaust mechanism 20. It has a thickness (for example, a thickness of about 4 mm) that does not cause deformation or breakage when it is in a state. As shown in FIGS. 2 and 3, two rectangular suction holes 14, 14 for communicating the inside and the outside of the accommodation space 12 are formed in the lower part of the back surface of the box 10 a, and the box 10 a As shown in FIG. 1, a circular exhaust hole 16 that connects the inside and the outside of the accommodation space 12 is formed in the approximate center of the upper surface of the housing. The left and right door members 10b and 10b are each formed in a plate shape, and are connected to the open edge of the box 10a via a hinge 11 so as to be rotatable. Each of the left and right door members 10b and 10b is provided with a handle portion 17 that is gripped by the measurer when opening and closing, and an insertion hole 18 into which the measurer's arm can be inserted. The insertion hole 18 is provided with an insertion hole closing member (not shown) that can close the insertion hole 18. The insertion hole blocking member includes, for example, a lid member that is detachable with respect to the insertion hole 18, a glove member that seals the insertion hole 18 and allows the operator's arm to be inserted, and a plurality of members from the center to the outer periphery. Various configurations such as a disc-shaped check member in which a radial cut is formed can be used. The space between the box body 10a and the door member 10b and between the left and right door members 10b and 10b are preferably sealed with a seal member (not shown). It can be a sealed space.

  The exhaust mechanism 20 includes an exhaust fan 21 that generates an exhaust flow, a damper (air volume adjusting means) 22 that adjusts an air flow of the exhaust flow, a first pipe 23 that communicates the exhaust hole 16 of the cover body 10 and the damper 22, and The second pipe 24 for communicating the damper 22 and the exhaust fan 21, the third pipe 25 for communicating the exhaust fan 21 and the outside, and a filter (not shown) capable of collecting the powdery substance to be measured And. The exhaust fan 21 is driven to bring the inside of the cover body 10 into a negative pressure state, flows from the outside of the cover body 10 into the housing space 12 through the suction hole 14, flows in the housing space 12, and flows from the exhaust hole 16. An exhaust flow that flows out is generated. The damper 22 is configured to variably adjust the air volume of the exhaust flow flowing inside the damper 22 by opening and closing an opening / closing member (not shown) provided therein. The damper 22 is provided with a handle 22a for opening and closing the opening / closing member. The opening / closing member is manually opened and closed by a measurer operating the handle 22a.

  The closing member 30 is made of a flexible rubber plate made of, for example, chloroprene rubber or silicon rubber, and is formed in a rectangular shape having a size that is slightly larger than the opening area of the suction hole 14. The closing member 30 has a thickness (for example, a thickness of about 1 mm) that bends when the inside of the housing space 12 is brought into a negative pressure state that does not affect various measurements of the powdery substance by the exhaust mechanism 20. Have. The thickness of the closing member 30 is appropriately set according to the exhaust air volume by the exhaust mechanism 20, the size of the suction holes 14, 14 of the cover body 10, the size of the closing member 30, and the like. As shown in FIGS. 2 and 3, the closing member 30 configured as described above has an upper edge portion 30 a that is an inner wall of the cover body 10 by an adhesive member (not shown) so as to cover the entire suction hole 14. Accordingly, while the inside of the accommodation space 12 is in a negative pressure state due to the exhaust of the exhaust mechanism 20, the lower end edge portion 30 b is bent so as to move into the accommodation space 12, and the suction hole 14. An open state is formed, and when the exhaust by the exhaust mechanism 20 stops, the original shape is restored and the suction hole 14 is closed. As the adhesive member for fixing the closing member 30 to the cover body 10, various means such as a strong double-sided tape, a hinge and an adhesive can be used, for example, using a strong double-sided tape having thickness and flexibility, It is preferable because it is more durable than the case where an adhesive is used and the cost can be reduced as compared with the case where a hinge is used.

  Next, the usage method of the dust-proof cover member 1 which concerns on this embodiment is demonstrated. When the dust-proof cover member 1 is used, first, the door members 10b and 10b of the cover body 10 are opened, and the powdery substance to be a sample in the cover body 10 and tools necessary for measurement work such as a spatula and a funnel Then, the door members 10b and 10b are closed. Next, in a state where the opening / closing member of the damper 22 is closed (that is, a state where the exhaust air volume is zero), the exhaust fan 21 is turned on to drive the exhaust fan 21. Thereafter, the opening / closing member is gradually opened by operating the handle 22a of the damper 22, and the air flow rate of the exhaust flow is adjusted so that the air flow rate does not affect various measurements of the powdery substance. Here, the air volume that does not affect various measurements of the powdery substance is the air volume that does not cause the powdery substance to float and be exhausted, and it varies as appropriate according to the specific gravity of the powdery substance. It is. Next, the arm of the measurer is inserted through the insertion holes 18 and 18 of the door members 10b and 10b, and the powdery substance is set in the various sample measuring units of the powdery substance measuring apparatus 2. Next, the powdery substance measuring device 2 is turned on and predetermined measurement is performed. In addition, since the various measuring methods of a powdery substance are known, description is abbreviate | omitted. After the various measurements of the powdery substance are completed, the door members 10b and 10b are opened, and the angle of repose and the degree of dispersion are measured. After these measurements are completed, the opening / closing member of the damper 22 is fully opened, and the powdery substance scattered in the cover body 10 is cleaned. Thereafter, when the measurement is continued, the above operation is repeated.

  The dust-proof cover member 1 according to the present embodiment includes a cover body 10 having an accommodation space 12 that can accommodate the powdery substance measuring device 2, an exhaust mechanism 20 that exhausts air in the accommodation space 12 from the exhaust holes 16, and By providing the closing member 30 that can close the suction hole 14, when the powdery substance is measured using the powdery substance measuring device 2, it is effective that the powdery substance is scattered outside the cover body 10. It is possible to reduce the possibility that the measurer sucks the powdery substance. Further, according to the dust-proof cover member 1 according to the present embodiment, the closing member 30 opens the suction hole 14 while the air in the accommodation space 12 is exhausted by the exhaust mechanism 20, and exhausts by the exhaust mechanism 20. Since the suction hole 14 is closed while the exhaust mechanism 20 is stopped, the powdery substance can be prevented from scattering even when the exhaust mechanism 20 is stopped. In addition, the dust-proof cover member 1 according to the present embodiment has a simple configuration in which the closing member 30 is formed of a flexible plate member, and thus the manufacturing cost can be suppressed.

  Further, the dust-proof cover member 1 according to the present embodiment includes a damper (air volume adjusting means) 22 that can adjust the exhaust air volume, so that depending on the type (specific gravity) of the powdery substance to be measured, Since the exhaust air volume can be adjusted to such an extent that the powdery substance does not float up, the influence of the exhaust by the exhaust mechanism 20 on the measurement can be reduced. Moreover, since the damper (air volume adjusting means) 22 of the dust-proof cover member 1 according to the present embodiment can manually adjust the exhaust air volume, the exhaust air volume can be appropriately adjusted according to the feeling of the measurer. Such adjustment of the exhaust air volume based on the sense of the measurer is particularly effective in measuring a powdery substance that needs to consider the measurement environment (humidity) at the time of measurement.

  Furthermore, since the dust-proof cover member 1 according to the present embodiment has the exhaust hole 16 formed in the upper surface of the cover body 10 and the suction hole 14 formed in the lower portion of the back surface of the cover body 10, the exhaust flow is covered by the cover member. The upward air flow from the lower part of the back surface to the upper surface can be reduced, the influence of the exhaust flow on the measurement of the powdery substance can be reduced, and the scattered powdery substance can be efficiently exhausted.

  The dust-proof cover member according to the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the technical idea of the present invention. For example, in the dust-proof cover member 1 according to the present embodiment, the opening / closing member in the damper 22 is manually opened / closed, but is not limited thereto, and is electrically opened / closed. Also good. Further, when the opening and closing member is electrically opened and closed, the air volume may be adjusted by feedback control or the like.

  Further, in the dust-proof cover member 1 according to the present embodiment, the closing means is the closing member 30 composed of a plate member such as a rubber plate, but is not limited thereto, and the housing space 12 is formed by the exhaust mechanism 20. The suction hole 14 may be opened while the air inside is exhausted, and the suction hole 14 may be closed while the exhaust by the exhaust mechanism 20 is stopped. For example, the closing means may be a closing member composed of a sheet member such as an ultrathin film. Further, for example, the closing means may include a closing member formed so as to cover the entire suction hole 14 and a hinge member that is fixed to the inner wall of the cover body 10 and supports the closing member in a swingable manner. In this case, the closing member does not need to have flexibility.

DESCRIPTION OF SYMBOLS 1 Dust-proof cover member, 2 Powdery substance measuring apparatus, 10 Cover main body, 12 Storage space, 14 Suction hole, 16 Exhaust hole, 20 Exhaust mechanism, 30 Closure member

Claims (6)

A box-shaped cover body having an accommodation space capable of accommodating a powdery substance measuring device for measuring physical properties of the powdery substance, and having suction holes and exhaust holes formed therein;
Exhaust means for exhausting air in the accommodation space from the exhaust hole;
A closing means capable of closing the suction hole;
In the cover member, the suction hole is formed in the lower part of the back surface of the cover body, and the exhaust hole is formed in the upper surface of the cover body. Configured to occur,
The closing means includes a plate-like closing member formed so as to cover the entire suction hole, and at least one end side of the closing member is fixed to the wall surface of the cover body, and the other end side facing the one end side is The exhaust space is moved into the accommodation space by the negative pressure state due to the exhaust of the exhaust means to form an open state of the suction hole, and the exhaust by the exhaust means is stopped. A dustproof cover member configured to close the suction hole. The dust-proof cover member according to claim 1, wherein the exhaust unit includes an air volume adjusting unit capable of adjusting an exhaust air volume. The dust-proof cover member according to claim 2, wherein the air volume adjusting means can manually adjust the exhaust air volume. The closure member is flexible Ri rubber plate der to have a, the housing space forms an open state of the suction holes flexes into said receiving space by the negative pressure state, by the exhaust means The dust-proof cover member according to any one of claims 1 to 3 , wherein the dust-proof cover member is configured to be restored to its original shape when the exhaust stops and to close the suction hole.   The closing member is fixed to the inner wall of the cover body by an adhesive member,
  The adhesive member is a double-sided tape, a hinge or an adhesive.
  The dust-proof cover member according to any one of claims 1 to 4, wherein the dust-proof cover member is provided.   The adhesive member is a double-sided tape.
  The dust-proof cover member according to claim 5.

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