JP4219268B2 - Fastener for powder filling device and powder filling device provided with the fastener - Google Patents

Description

The present invention relates to a fastener for a powder filling device, and more particularly, a fastener for fixing and closely contacting a bag mouth portion of a bag for storing powder discharged from a discharge tube to the outer periphery of the discharge tube and the like The present invention relates to a powder filling apparatus provided with a fastener.

Conventionally, a powder storage bag is used at the end of a discharge cylinder for incineration ash, desalted residue, and the like to store discharged powder. The bag mouth portion of the powder storage bag is fitted and attached so as to cover the outer periphery of the discharge tube end portion, and is tightened with a fastening tool from the outside to be brought into close contact with the discharge tube outer periphery. In this way, the discharged powder is prevented from leaking from the gap between the discharge tube and the bag and scattering into the atmosphere. In particular, when the powder is pneumatically transported, it is easily scattered in the atmosphere along with this air flow, and thus such a fastener is used. Further, the fastening tool fixes the bag opening so that it does not fall out of the discharge tube.

  For example, a metal band fastener 30 as shown in FIG. 13 is known. The metal band fastener 30 has a metal belt portion 31 and a lock portion 32, and the length of the belt portion 31 is changed according to the outer diameter of the discharge tube 5, the thickness of the bag mouth portion 61 of the storage bag, and the like. The bag mouth 61 is locked to the outer periphery of the discharge cylinder 5. As a result, even if the powder is discharged from the discharge cylinder 5, it is possible to prevent problems such as the powder scattering into the atmosphere without leaking from the bag mouth portion 61. Further, the bag mouth portion 61 can be fixed so as not to fall out of the discharge cylinder 5.

  In the metal band fastener 30 described above, the metal belt portion 31 is made of a mild steel plate or a stainless steel plate, and since it has high rigidity, it exerts a strong fastening force and strongly presses the bag mouth portion 61 against the outer periphery of the discharge cylinder 5. The bag mouth portion 61 and the outer periphery of the discharge cylinder 5 are brought into close contact with each other. However, irregularities may be formed on the outer periphery of the discharge cylinder 5 due to some external force such as an object hitting. However, since the metal belt portion 31 has high rigidity, the metal belt portion 31 cannot follow the unevenness of the outer periphery shape of the discharge tube 5 and a gap is generated between the bag mouth portion 61 and the outer periphery of the discharge tube 5 as shown in FIG. Your body will leak and scatter in the atmosphere.

  Further, the metal belt portion 31 is easy to follow the discharge cylinder 5 having a circular outer periphery, but is difficult to follow the discharge cylinder 5 having a deformed outer periphery because of its high rigidity, and between the bag mouth portion 61 and the outer periphery of the discharge cylinder 5. A gap will occur.

  Furthermore, if the discharge cylinder 5 has a large diameter, for example, about 0.5 m, the metal belt portion 31 may sag or twist, and the tightening operation becomes difficult.

As another conventional technique, there is an elastic band fastener in which the metal belt portion 31 of the metal band fastener 30 is replaced with an elastic belt portion. In this elastic band fastener, the bag mouth portion 61 is fastened to the outer periphery of the discharge cylinder 5 with a restoring elastic force, and the gap between the bag mouth portion 61 and the outer periphery of the discharge cylinder 5 is brought into close contact. This elastic band fastener is rich in elasticity and easily follows the discharge cylinder 5 on the outer periphery of the irregular shape. However, when the bag mouth portion 61 is fastened to the outer periphery of the discharge cylinder 5, tensile stress is always generated in the elastic band, so that it cannot follow the recesses on the outer periphery of the discharge cylinder 5, and a gap is generated.
Further, when the discharge cylinder 5 has a large diameter, sagging and twisting occur, and the tightening operation becomes difficult.

By the way, a resin clamp has been proposed in which a tightening force is always uniform and an appropriate size is maintained even if a columnar body to be tightened is deformed (see Patent Document 1). According to this clamp, when the object to be tightened is thermally expanded or contracted, the connecting part that connects both ends of the metal belt moves, and the spring that urges the connecting part exerts an appropriate tightening force on the metal belt. I try to let them.
This fastener can follow the deformation of the object to be tightened if the object to be tightened is a circular outer periphery, but the followability is lowered if the outer periphery is irregular because the belt is metal. In addition, the followability is not excellent even for unevenness locally generated on the outer periphery.
JP-A-8-14217

The present invention has been made to solve the above-mentioned problems of the prior art. In other words, the powder filling is easy to follow the various outer peripheral shape of the discharge cylinder, and the bag mouth of the powder storage bag for storing the powder discharged from the discharge cylinder can be closely attached to the outer periphery of the discharge cylinder. An object of the present invention is to provide an apparatus fastening tool and a powder filling apparatus including the fastening tool.
Another object of the present invention is to provide a powder filling device fastener that can be easily tightened and a powder filling device including the fastener.

The fastener for a powder filling device according to claim 1 is configured to fasten the bag mouth portion to the discharge tube in a state where the bag mouth portion of the powder storage bag is fitted to the powder discharge tube of the powder filling device. A fastener,
Provided on the outer periphery of the discharge cylinder is a flexible tubular expansion body formed in a C-shape that expands by supplying fluid and presses the bag mouth portion against the discharge cylinder. Further, an annular ring is formed on the outer periphery of the tubular expansion body. A regulation ring formed in a substantially U-shaped cross section by extending the upper surface side and the lower surface side of the belt-shaped body toward the discharge tube side,
It is characterized in that the tubular expansion body is restricted from expanding outward by the restriction ring .

The fastener for a powder filling device according to claim 2 is configured to fasten the bag mouth portion to the discharge tube in a state where the bag mouth portion of the powder storage bag is fitted to the powder discharge tube of the powder filling device. A fastener,
Provided on the outer periphery of the discharge cylinder is a flexible tubular expansion body formed in a C-shape that expands by supplying fluid and presses the bag mouth portion against the discharge cylinder. Further, an annular ring is formed on the outer periphery of the tubular expansion body. The lower ring side of the belt-shaped body is extended toward the discharge tube side to provide a regulating ring formed in a substantially L-shaped cross section,
It is characterized in that the tubular expansion body is restricted from expanding outward by the restriction ring .

The powder filling apparatus according to claim 3 is a powder supply apparatus for supplying powder, a powder supply pipe having one end connected to the supply apparatus, and a discharge cylinder communicating with the other end of the supply pipe. The powder filling device fastener according to claim 1 or 2 provided on an outer periphery of an end portion of the discharge cylinder, and a compressor for supplying fluid to the tubular expansion body of the fastener. It is a feature .

According to a fourth aspect of the present invention, there is provided a powder filling apparatus comprising a vent pipe provided with a filter in the middle and having one end protruding into the atmosphere in the discharge pipe .

In the fastener for a powder filling apparatus according to claim 1, the tubular expansion body is substantially C-shaped, and the upper surface side and the lower surface side of the annular belt-shaped body are respectively extended toward the discharge tube side. By providing a regulating ring formed in a substantially U-shaped cross section, the tubular inflatable body can be expanded only on the inner peripheral side, and is further expanded and deformed on the inner peripheral side. Corresponding to the shape, it is possible to prevent the powder from scattering into the atmosphere, facilitate the tightening operation, and stabilize the position of the tubular expansion body. In particular, since the fastening tool can be attached and detached while the bag mouth portion is attached to the discharge cylinder, the fastening tool can be easily attached and detached .

In the fastener for a powder filling apparatus according to claim 2, the tubular inflating body is substantially C-shaped, and the lower surface side of the annular belt-like body is extended toward the discharge tube side to have a substantially L-shaped cross section. Since the tubular expansion body is regulated in two directions by providing the restriction ring formed in a shape, it is greatly expanded and deformed toward the inner peripheral side. It is possible to prevent scattering of the body into the atmosphere, facilitate tightening work, and stabilize the position of the tubular inflatable body. In particular, since the fastening tool can be attached and detached while the bag mouth portion is attached to the discharge cylinder, the fastening tool can be easily attached and detached .

In the powder filling apparatus according to claim 3, the bag mouth portion can be closely attached to and fixed to the outer peripheral shapes of various discharge cylinders, and the powder is stored in the storage bag while preventing the powder from scattering into the atmosphere. Can be filled. Further, the tightening operation can be facilitated to improve the work efficiency .

In the powder filling apparatus according to the fourth aspect, the powder can be filled into the storage bag while preventing the powder from being scattered in the atmosphere, and the tightening operation can be simplified.
Furthermore, since the ventilation pipe having the filter and communicating with the atmosphere is provided on the inner periphery of the discharge cylinder, only unnecessary air in the storage bag can be discharged into the atmosphere. That is, by preventing an increase in pressure in the storage bag due to powder filling, it is possible to efficiently fill the powder, and at the same time, to collect the powder that is about to be scattered into the atmosphere and to preserve the work environment. I can .

Furthermore, when the tubular expander is not inflated, the powder filling device fastener according to the present invention has a gap between the outer periphery of the discharge tube and the inner periphery of the tubular expander facing the outer periphery. Therefore, in this state, the bag mouth portion of the powder storage bag can be attached to the gap, and the attached bag mouth portion can be removed.
On the other hand, when the tubular expansion body expands, the outer periphery of the discharge cylinder and the inner periphery of the tubular expansion body are brought into close contact with each other. For this reason, the bag mouth portion mounted in the gap is in close contact with and fixed to the outer periphery of the discharge cylinder, and the supplied powder does not scatter in the atmosphere. Moreover, since the expanding tubular expansion body is flexible, it can be in close contact with the outer peripheral shape of the discharge tube. In particular, it is effective because it can absorb and close the gap caused by the unevenness on the outer periphery of the local discharge tube.
That is, the bag mouth portion can be easily fastened to the outer periphery of the discharge cylinder simply by supplying a fluid to the tubular expansion body. In addition, since the bag mouth portion can be closely attached and fixed following the outer peripheral shape of various discharge cylinders, the discharged powder is not leaked and scattered in the atmosphere .

A first embodiment of a fastener according to the present invention will be described below with reference to FIGS.
The flexible tubular expansion body 1 is provided with a fluid supply unit 2. A restricting ring 3 is arranged on the outer periphery of the tubular inflatable body 1 to constitute a fastener 4. The tubular inflatable body 1 is a tubular body made of rubber.
The restriction ring 3 is made of a material having a high tensile strength and a small elongation so that the expansion of the tubular inflatable body 1 toward the outer peripheral side can be restricted. For example, what can restrict | swell expansion to the outer peripheral side of the tubular expansion body 1, such as a steel plate, an aluminum plate, a reinforced fiber, may be sufficient.

  When the fluid supply unit 2 is connected to the fluid supply pipe 20 and air b is supplied from the compressor 21 to the tubular expansion body 1, the pressure in the tubular expansion body 1 rises and the tubular expansion body 1 expands. ing. In this embodiment, the tubular expansion body 1 and the restriction ring 3 are separate parts, but they may be joined and integrated.

  In the first embodiment, the restriction ring 3 has a U-shaped cross section with the inner peripheral side open, so that there is almost no displacement of the tubular inflatable body 1 and stabilization can be achieved. The U-shape need not be provided over the entire circumference, and for example, the U-shape may be provided as appropriate in the circumferential direction.

Further, the cross-sectional shape of the restriction ring 3 can be a simple plate as shown in FIG. Further, as shown in FIG. 6, the cross-sectional shape may be L-shaped so as to cover at least the outer peripheral side of the tubular expansion body 1. This L-shape need not be provided over the entire circumference, and may be provided as appropriate in the circumferential direction.
The cross-sectional shape of the tubular inflatable body 1 may be substantially circular as shown in FIG. 7 and provided with a recess on the inner peripheral side. The combination of the cross-sectional shapes of the tubular inflatable body 1 and the restriction ring 3 can be appropriately determined according to conditions.

Next, the method of use will be described with reference to FIG. First, the fastening tool 4 is inserted through the end of the discharge cylinder 5 in a state where the tubular expansion body 1 is not expanded. Next, a bag mouth 61 of the storage bag 6 for storing the powder a is inserted between the outer periphery of the discharge cylinder 5 and the inner periphery of the tubular expansion body 1 so as to cover the outer periphery of the end of the discharge cylinder 5. Attach to.
Then, the fluid supply part 2 and the fluid supply pipe | tube 20 are connected, the air b is supplied from the compressor 21, and the tubular expansion body 1 is expanded. Since the tubular inflatable body 1 expands only on the inner peripheral side, the bag mouth portion 61 is strongly pressed against the outer periphery of the discharge cylinder 5. That is, the bag mouth portion 61 can be tightly attached and fixed by tightening the outer periphery of the discharge tube 5. When the powder a is discharged and filling is started in this state, the powder a discharged from the discharge tube 5 does not leak from the bag mouth portion 61 and is not scattered into the atmosphere.

  Since the tubular expansion body 1 is rubber, it can be in close contact with the outer peripheral shape of the discharge cylinder 5. The tubular inflatable body 1 is not limited to rubber, and other elastic bodies can be used. Moreover, since the tubular expansion body 1 is inflated and brought into close contact with the inner peripheral side by air pressure, the contact force can be adjusted by increasing or decreasing the air pressure.

  Further, since the bag mouth portion 61 is simply supplied with the air b by the compressor 21, a troublesome tightening operation is not required, and the operation can be simplified. Instead of air, other gases (for example, nitrogen, argon, oxygen, etc.) or liquids (for example, water) can be used.

  If the discharge cylinder 5 is made of a material attached to a magnet such as iron, it is convenient to provide the restriction ring 3 with a magnet because the restriction ring 3 can be temporarily fixed.

  When the filling of the powder a is completed and the bag mouth 61 of the storage bag 6 is removed from the discharge tube 5, the air in the tubular inflatable body 1 may be removed. Thereby, since expansion | swelling in the tubular expansion body 1 is lose | eliminated, the clamp | tightening by the fastener 4 is relieve | moderated and the bag mouth part 61 can be removed easily. The fluid supply unit 2 functions as an air supply valve and a discharge valve. By operating these valves, the air in the tubular expansion body 1 is extracted. Of course, the discharge valve function may be provided separately from the fluid supply unit 2.

Next, a second embodiment will be described based on FIGS.
The tubular inflatable body 1 is formed in a C shape with a tubular body having both ends made of rubber closed, and has a fluid supply portion 2. The regulation ring 3 is formed in an annular shape by connecting both ends of the steel strip. In this connection, a restriction ring fitting portion 22 that is fitted to both ends is provided, and these are connected. The connection method is not particularly limited, and a general connection method may be used.

In the second embodiment, a method of mounting the fastener 4 to the discharge cylinder 5 will be described. First, it attaches in the state fitted so that the bag mouth part 61 of the storage bag 6 might be covered on the outer periphery of the discharge cylinder 5 end part. Next, the tubular inflatable body 1 is elastically deformed to enlarge the C-shaped gap and is fitted onto the bag mouth portion 61. Similarly, the restriction ring 3 is fitted on the tubular inflatable body 1 by expanding the gap between both ends by elastic deformation. Then, the restriction ring fitting portions 22 are fitted to each other to form an annular shape.
Here, the restriction ring 3 is elastically deformed to enlarge the gaps at both ends. However, a hinge or the like may be provided on a part of the circumference of the restriction ring 3 to facilitate the enlargement of the gaps.

  The shape of the gap between the both ends of the restriction ring 3 is vertical as shown in FIG. 10, but is not limited to this, and may be inclined with respect to the vertical method as shown in FIG. The gap shape having an inclination can be similarly used at both ends of the tubular expansion body 1.

  The usage method after the fastener 4 is mounted on the discharge cylinder 5 is the same as that of the first embodiment. Even in the second embodiment, the tubular inflatable body 1 and the restriction ring 3 are separate parts, but they may be joined and integrated.

Next, an embodiment of the powder filling apparatus 9 of the present invention will be described with reference to FIG.
A powder supply device 16 that supplies the powder a together with the air c communicates with the header portion 11 at the top of the powder filling device 9 via the powder supply pipe 10. The header portion 11 communicates with the discharge cylinder 5 via the flexible connecting portion 12. A fastener 4 according to the present invention is provided on the outer periphery of the end of the discharge cylinder 5. One end of the fluid supply pipe 20 is attached to the fluid supply part 2 of the fastener 4, and the other end is attached to the compressor 21. The discharge cylinder 5 is fixed to the base 17 by a support 15. One end of the discharge tube 5 protrudes into the atmosphere, and a vent pipe 13 provided with a powder removal filter 14 is supported by a support beam 19 protruding from the inner periphery of the discharge tube 5.

  The flexible connecting portion 12 is effective for adjusting the position of the end portion of the discharge cylinder 5. Although the support 15 is fixed to the base 17, it can also be movable. The other end of the vent pipe 13 is located below the discharge cylinder 5 in the embodiment, but this position can be changed as appropriate. Moreover, although the header part 11 and the flexible connection part 12 are provided in embodiment, what is necessary is just to provide these as needed.

  Next, the usage method will be described. Attach to the outer periphery of the end of the discharge cylinder 5 so as to cover the bag mouth portion 61 of the storage bag 6, attach the fastener 4 on the bag mouth portion 61, operate the compressor 21, and tighten it. The tubular expansion body 1 of the attachment 4 is inflated, and the bag mouth portion 61 is fastened to the outer periphery of the discharge cylinder 5. Then, the powder supply device 16 supplies the powder a together with the air c. The powder a and the air c are guided to the discharge cylinder 5 through the powder supply pipe 10, the header part 11, and the flexible connection part 12, and filled in the storage bag 6. At this time, the bag mouth portion 61 is closely attached and fixed to the outer periphery of the discharge cylinder 5 by the fastening tool, so that the powder a does not leak together with the air c and is not scattered in the atmosphere.

By the way, since the powder a is supplied together with the air c, in the case of the storage bag 6 having poor air permeability, the pressure in the storage bag 6 increases and the filling efficiency decreases. However, the vent pipe 13 releases excess air c into the atmosphere in response to this pressure rise, reducing the pressure rise and preventing a decrease in filling efficiency. The powder removal filter 14 provided in the middle of the vent pipe 13 discharges only the air c and prevents the powder a from leaking.
On the other hand, if the storage bag 6 has a certain level of air permeability, the vent pipe 13 need not be provided.

  Although the independent compressor 21 is installed in the embodiment, supply air, instrument air, nitrogen, or the like used in the powder supply device 16 can be used.

In particular, when handling harmful powders and the like, the fastener according to the present invention and the powder filling apparatus provided with the fastener are suitable.

It is a partial notch figure which shows the use condition of the fastener of 1st embodiment. It is a block diagram of the fastener of 1st embodiment. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 (when the tubular expansion body is not expanded). FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 (when the tubular expansion body is inflated). It is a figure which shows a part of cross section of other embodiment of a fastener. It is a figure which shows a part of cross section of other embodiment of a fastener. It is a figure which shows a part of cross section of other embodiment of a fastener. It is a top view which isolate | separates the structure of the fastener of 2nd embodiment, and shows an attachment process. FIG. 9 is a state diagram in which the attachment of the fastener in FIG. 8 is completed. It is a figure which shows the control ring of B arrow in FIG. It is a figure which shows the modification of FIG. It is a schematic diagram of an embodiment of a powder filling device of the present invention. It is a whole perspective view of the conventional metal band clamp. It is a plane sectional view showing a crevice between a metal belt fastener and a discharge cylinder outer periphery.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tubular expansion body 2 Fluid supply part 3 Restriction ring 4 Fastening tool
DESCRIPTION OF SYMBOLS 5 Discharge cylinder 6 Storage bag 61 Bag mouth part 9 Powder filling apparatus 10 Powder supply pipe 11 Header part 12 Flexible connection part
DESCRIPTION OF SYMBOLS 13 Ventilation pipe 14 Filter 15 Support body 16 Powder supply apparatus 17 Base 19 Support beam 20 Fluid supply pipe 21 Compressor 22 Restriction ring fitting part 30 Metal band fastening tool 31 Metal belt part 32 Lock part

Claims (4)

In a state where the bag mouth portion of the powder storage bag is fitted to the powder discharge tube of the powder filling device, a fastening tool for fastening the bag mouth portion to the discharge tube,
Provided on the outer periphery of the discharge cylinder is a flexible tubular expansion body formed in a C-shape that expands by supplying fluid and presses the bag mouth portion against the discharge cylinder. Further, an annular ring is formed on the outer periphery of the tubular expansion body. A regulation ring formed in a substantially U-shaped cross section by extending the upper surface side and the lower surface side of the belt-shaped body toward the discharge tube side,
A powder filling apparatus fastener according to claim 1, wherein the tubular ring is restricted from expanding outward by the restriction ring . In a state where the bag mouth portion of the powder storage bag is fitted to the powder discharge tube of the powder filling device, a fastening tool for fastening the bag mouth portion to the discharge tube,
Provided on the outer periphery of the discharge cylinder is a flexible tubular expansion body formed in a C-shape that expands by supplying fluid and presses the bag mouth portion against the discharge cylinder. Further, an annular ring is formed on the outer periphery of the tubular expansion body. The lower ring side of the belt-shaped body is extended toward the discharge tube side to provide a regulating ring formed in a substantially L-shaped cross section,
A powder filling apparatus fastener according to claim 1, wherein the tubular ring is restricted from expanding outward by the restriction ring . A powder supply device for supplying powder, a powder supply pipe having one end connected to the supply device, a discharge cylinder communicating with the other end of the supply pipe, and an outer periphery of an end of the discharge cylinder Item 3. A powder filling device comprising: the powder filling device fastener according to Item 1 or 2 ; and a compressor for supplying fluid to a tubular expansion body of the fastener. 4. The powder filling apparatus according to claim 3 , wherein a vent pipe having one end protruding into the atmosphere and having a filter in the middle is provided in the discharge pipe .

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