JP2013035594A - Outlet opening and closing device for powder container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of powder drop when conveying a powder container from a discharge place by eliminating powder attached and left at a fitting part between an on-off valve and an elevating body or an outlet portion, in an outlet opening and closing device performing an elevation opening and closing operation by fitting the elevating body to the on-off valve of the outlet of the powder container.SOLUTION: This outlet opening and closing device (2) comprises: an on-off valve (8) of a hollow conical shape provided inside an outlet (6) of a powder container (4); a valve opening and closing means (12) for elevating and opening and closing the on-off valve (8) by separably fitting an elevating body (10) having a conical outer surface to the on-off valve (8); and a cleaning means (14) for jetting cleaning air from the elevating body (10) toward the on-off valve (8) when separating the fitted on-off valve (8) and the elevating body (10) from each other.

Description

  The present invention relates to a discharge opening / closing device for a powder container that opens and closes an opening / closing valve of a discharge opening of a powder container by fitting an elevating body from the outside lower side of the discharge opening.

  Powder that opens and closes a hollow conical on-off valve provided inside the discharge port of a container that contains powder and transported to a discharge location by fitting a conical lifting body from the lower outside of the discharge port There is a body container discharge opening and closing device (see, for example, Patent Document 1).

JP-A-2-233390 (FIG. 1)

  The above-described powder container outlet opening / closing device has the following problems to be improved.

  That is, when the conical inner surface of the lifting / lowering body is fitted to the conical inner surface of the opening / closing valve to open / close the opening / closing valve and discharge the powder, the lifting / lowering body is lowered and released from the fitting when the lifting / lowering body is lowered. The powder and dust discharged to the fitting part of the body and the periphery are likely to adhere and remain.

  Therefore, the powder adhering and remaining on the opening / closing valve and the discharge port falls when the powder container is lifted and transported from the discharge location by a crane, etc., and the problem of contaminating the discharge location and transport route, and the surrounding environment. There are problems that make it worse.

  The present invention has been made in view of the above-mentioned facts, and its main technical problem is that a hollow conical on-off valve of a discharge port of a powder container is fitted with a lifting body having a conical outer surface from below to open and close. When the powder container is transported from the discharge location, the powder will drop off, except that the powder will adhere and remain on the fitting part of the open / close valve and the lifting body, the discharge port part, etc. It is to eliminate the problem of polluting the discharge place and the transport route and the problem of deteriorating the surrounding environment.

  The powder container outlet opening / closing device that solves the technical problem according to the present invention is provided inside the powder container outlet, is formed in a hollow conical shape with the bottom open, and the periphery of the bottom is the outlet. An open / close valve that opens and closes the discharge port, and a valve opening / closing means that opens and closes the open / close valve by fitting a lifting body having a conical outer surface to the conical inner surface of the open / close valve from the outside of the discharge port. And a cleaning means for injecting cleaning air from the lifting body toward the conical inner surface of the opening / closing valve when separating the fitted opening / closing valve and the lifting body.

  Preferably, the cleaning means includes an annular air chamber formed on the inner peripheral surface of the conical lifting body and connected to a pressure air source, and a plurality of openings opened on the conical outer surface of the lifting body and connected to the annular air chamber. An injection nozzle.

  And the raising / lowering body is provided with the elastic layer covered on the outer side of the conical main body. The injection nozzle includes a hollow male screw standing on the conical body and communicating with the annular air chamber and penetrating through the elastic layer, and a nut screwed into the hollow male screw to press and fix the elastic layer.

  The powder container outlet opening / closing device constructed according to the present invention is formed in a hollow conical shape provided inside the powder container outlet and opens and closes the outlet by opening and closing the peripheral edge of the bottom surface to the outlet. A valve, a valve opening / closing means for opening and closing the opening / closing valve by opening and closing the opening / closing valve by fitting a lifting / lowering body having a conical outer surface to the conical inner surface of the opening / closing valve from the outside of the discharge port. And cleaning means for injecting cleaning air from the lifting body toward the conical inner surface of the on-off valve when releasing the valve.

  Accordingly, the discharge container opening / closing device of the powder container according to the present invention includes a cleaning means for injecting cleaning air from the lifting body toward the conical inner surface of the opening / closing valve when separating the fitted opening / closing valve and the lifting body. As a result, it is possible to eliminate the adhesion of powder to the fitting part and discharge port of the open / close valve and the lifting body, and when the powder container is removed from the discharge location and transported, the adhered powder falls. It is possible to eliminate the problem of soiling the discharge place and the transport route and the problem of deteriorating the surrounding environment.

The side view which showed the opening-and-closing valve and the valve opening-closing means of the discharge port opening / closing apparatus of the powder container comprised according to this invention in the isolation | separation state. The side view which showed the on-off valve and valve opening-and-closing means of FIG. 1 in the fitting state. FIG. 3 is a partially enlarged cross-sectional view of the on-off valve and the valve on-off means in the fitted state of FIG. Explanatory drawing of the cleaning effect | action of the washing | cleaning means of FIG.

  Hereinafter, a discharge opening and closing device for a powder container constructed according to the present invention will be described in more detail with reference to the accompanying drawings illustrating preferred embodiments. In the accompanying drawings, a part of the cross-sectional hatching is omitted in order to avoid complicated drawings.

  This will be described with reference to FIGS. The powder container discharge port opening / closing device indicated by number 2 is provided inside the discharge port 6 of the powder container 4 and is formed in a hollow conical shape having an open bottom surface, and the peripheral edge of the bottom surface is brought into and out of contact with the discharge port 6. An on-off valve 8 for opening and closing the discharge port 6 and an elevating body 10 having a conical outer surface are slidably fitted to the conical inner surface of the on-off valve 8 from the outside of the discharge port 6 to raise and lower the on-off valve 8 (arrow Z1). Z2) Valve opening / closing means 12 for opening / closing, and cleaning means for injecting cleaning air from the lifting body 10 toward the conical inner surface of the opening / closing valve 8 when the fitted opening / closing valve 8 and the lifting body 10 (FIG. 2) are separated. 14 is provided.

  The powder container 4 is a container that contains powder H and discharges from a lower discharge port 6 having an opening / closing valve 8. The powder container 4 has a cylindrical main body 4 a having a powder input port, and extends downward from the main body 4 a. And a plurality of leg frames 4c attached around the main body 4a and the funnel-shaped portion 4b. The leg frame 4c of the powder container 4 is placed on the powder discharge place 16 (FIG. 2).

  The on-off valve 8 includes a valve main body 8a formed of stainless steel in a hollow conical shape with an open bottom surface, and an annular seal 8b attached to the peripheral edge of the bottom surface of the valve main body 8a and contacting and leaving the discharge port 6 of the funnel-shaped portion 4b. I have. The annular seal 8b is formed in an elliptical cross section by synthetic rubber and is attached in a seal frame 8c provided integrally with the valve body 8a.

  The powder discharge place 16 is provided with a funnel-shaped powder inlet 18 that extends upward so that the outlet 6 of the powder container 4 can be accommodated when the powder container 4 is placed. A valve opening / closing means 12 having an elevating body 10 is provided at the center of the insertion port 18.

  The valve opening / closing means 12 includes a bellows type lifting drive 20 that moves the lifting body 10 up and down, a clamp seal 22 that releasably holds the fitted state of the lifting body 10 and the opening / closing valve 8, the clamp seal 22, and lifting / lowering An elastic dust cover 24 that covers the drive body 20 is provided.

  The raising / lowering drive body 20 is equipped with the well-known bellows which expand-contract to the up-down direction shown by the arrow Z1 and the downward direction shown by Z2 by supply / discharge of pressure air. Pressure air from the pressure air source 26 provided at the discharge place 16 is supplied to and discharged from the lift driver 20 by the controller 28.

  A description will be given mainly with reference to FIG. The elevating body 10 includes a conical body 10a made of stainless steel, an elastic layer 10b covered on the outer side, and a cover 10c made of synthetic rubber on the outer side of the elastic layer 10b. The elastic layer 10b is a porous sponge formed by foaming a synthetic resin such as polyurethane.

  At the tip which is the apex of the conical body 10a, there is provided a buffer body 10d that first contacts the opening / closing valve 8 when the opening / closing body 10 is fitted to the opening / closing valve 8 to alleviate the impact of the fitting. The buffer 10d can be formed of an appropriate material such as a synthetic resin or a spring.

  The clamp seal 22 is formed of a synthetic rubber into an annular tube shape having a hollow cross section, and is disposed at a position facing the seal frame 8 c of the annular seal 8 b of the on-off valve 8. The clamp seal 22 is expanded and closed by supplying the pressure air from the pressure air source 26 by the controller 28 and supplying the pressure air in a state in which the elevating body 10 is fitted to the on-off valve 8 (FIG. 3). The annular seal 8 b of the valve 8 is pressed against the discharge port 6 of the powder container 4 to hold the on-off valve 8 and the lifting body 10 together. When the pressure air is removed from the clamp seal 22, this pressing state is released.

The procedure for opening and closing the on-off valve 8 by the valve on-off means 12 will be described with reference to FIGS.
(1) As shown in FIG. 1, the raising / lowering body 10 of the discharge place 16 is lowered below Z2, and the pressure air of the clamp seal 22 is released.
(2) As shown in FIG. 1, the powder container 4 is positioned above the discharge place 16, and is lowered and placed on the discharge place 16 as shown in FIG. 2.
(3) As shown in FIGS. 2 and 3, the pressure air from the pressure air source 26 is supplied to the clamp seal 22 by the controller 28 and expanded to hold the on-off valve 8 and the lifting body 10 together.
(4) When the lifting / lowering driving body 20 of the valve opening / closing means 12 is extended in this holding state and the lifting / lowering body 10 is raised in the Z1 direction, the opening / closing valve 8 is raised in the arrow Z1 direction (indicated by a two-dot chain line in FIG. 2). The discharge port 6 is opened, and the powder H in the powder container 4 is discharged to the input port 18 of the discharge place 16.
(5) To stop the discharge of the powder H, the lifting / lowering driving body 20 is contracted by the controller 28, the lifting / lowering body 10 is lowered together with the on-off valve 8 in the arrow Z2 direction, and the discharge port 6 is closed.

  Next, the cleaning means 14 will be described with reference to FIGS. The cleaning means 14 includes an annular air chamber 14 a formed on the inner peripheral surface of the conical lifting body 10 and connected to the pressure air source 26 via a control valve 28, and opens to the conical outer surface of the lifting body 10. A plurality of injection nozzles 14b connected to the chamber 14a are provided (in the embodiment, six nozzles are equally spaced in the circumferential direction).

  The injection nozzle 14b is erected on the conical body 10a of the elevating body 10 and communicates with the annular air chamber 14a. The injection nozzle 14b is screwed into the hollow male screw 14c and the elastic layer 10b and the cover 10c. A nut 14d for pressing and fixing to the conical body 10a is provided.

The cleaning action of the cleaning means 14 will be described with reference to FIG. 4 together with FIG.
(1) When the pressure air of the clamp seal 22 shown in FIG. 3 is extracted and contracted as shown in FIG. 4 and the fitted on-off valve 8 and the lifting body 10 are separated, the pressure air of the pressure air source 26 is annular air. The chamber 14 is supplied by a controller 28.
(2) As shown in FIG. 4, the supplied pressurized air is injected from the injection nozzle 14 b into the gap S between the on-off valve 8 and the lifting body 10, and remains and adheres to the gap S, in particular, lowers the lifting body 10. When the opening / closing valve 8 and the lifting / lowering body 10 are separated, the powder sucked from the inlet 18 side is washed away by the inlet 18 of the lower discharge place 16.

  The operation and effect of the powder container outlet opening / closing device 2 as described above will be described.

  A discharge opening / closing device 2 for a powder container constructed according to the present invention is formed in a hollow conical shape provided inside the discharge opening 6 of the powder container 4, and the peripheral edge of the bottom is brought into contact with and separated from the discharge opening 6. A valve opening / closing means for opening / closing the opening / closing valve 8 by opening / closing the opening / closing valve 8 and opening / closing the valve 8 by opening / closing the opening / closing valve 8. 12 and cleaning means 14 for injecting cleaning air from the lifting body 10 toward the conical inner surface of the opening / closing valve 8 when the fitted opening / closing valve 8 and the lifting body 10 are separated.

  Therefore, the discharge port opening / closing device 2 includes the cleaning means 14 for injecting cleaning air from the lifting body 10 toward the conical inner surface of the opening / closing valve 8 when separating the fitted opening / closing valve 8 from the lifting body 10. In addition, it is possible to remove the adhesion residue of the powder to the fitting portion or the discharge port portion of the on-off valve 8 and the lifting body 10, and when the powder container 4 is detached from the discharge place 16 and conveyed, The problem of falling and soiling the discharge location 16 and the conveyance path and the problem of deteriorating the surrounding environment can be eliminated.

  The cleaning means 14 includes an annular air chamber 14a formed on the inner peripheral surface of the conical lifting body 10 and connected to the pressure air source 26, and a plurality of cleaning means 14 opened to the conical outer surface of the lifting body 10 and connected to the annular air chamber 14a. The injection nozzles 14b are provided.

  Therefore, by providing the annular air chamber 14a, the inner surface of the on-off valve 8 and the outer surface of the lifting body 10 can be cleaned efficiently with a simple structure.

  The elevating body 10 includes an elastic layer 10b that covers the outside of the conical body 10a. The injection nozzle 14b includes a hollow male screw 14c standing on the conical body 10a and communicating with the annular air chamber 14a and penetrating through the elastic layer 10b, and a nut 14d screwed into the hollow male screw 14c to press and fix the elastic layer. I have.

  Therefore, the elastic layer 10b can absorb the impact when the on-off valve 8 and the lifting body 10 are fitted, and can open the on-off valve 8 smoothly and accurately. In addition to the function of injecting air, the injection nozzle 14 can mechanically fix and hold the elastic layer 10b of the lifting body 10 reliably.

  The present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various changes or modifications can be made within the scope of the present invention, for example, as described below. Is.

  As for the cleaning means 14, the example in which the cleaning air is jetted from the lifting body 10 toward the conical inner surface of the switching valve 8 when the fitted opening / closing valve 8 and the lifting body 10 are separated has been described. A sequence controller may be prepared in 28 so that this procedure is automatically controlled in relation to opening / closing of the on-off valve 8.

  The cleaning means 14 includes six injection nozzles 14b in the elevating body 10, but the number and arrangement of the injection nozzles may be appropriately changed depending on the size and shape of the outlet opening / closing device 2 and the properties of the powder to be handled. Good. Further, the spray nozzle may be a net-like nozzle that forms a plurality of spray ports.

2: Discharge port opening / closing device 4: Powder container 6: Discharge port 8: Open / close valve 10: Lifting body 10a: Conical body 10b: Elastic layer 12: Valve opening / closing means 14: Cleaning means 14a: Annular air chamber 14b: Injection nozzle 14c: hollow male screw 14d: nut 18: inlet 26: pressure air source

Claims (4)

An open / close valve that is provided inside the discharge port of the powder container, is formed in a hollow conical shape having an open bottom surface, and opens and closes the discharge port by bringing the peripheral edge of the bottom surface into and out of contact with the discharge port;
A valve opening / closing means for fitting an elevating body having a conical outer surface to the conical inner surface of the on-off valve from the outside of the discharge port so as to freely contact and separate, and opening and closing the on-off valve;
Cleaning means for injecting cleaning air from the lifting body toward the conical inner surface of the switching valve when separating the fitted opening / closing valve and the lifting body;
A discharge container opening and closing device for a powder container. Cleaning means
An annular air chamber formed on the inner peripheral surface of the conical lifting body and connected to a pressure air source;
A plurality of injection nozzles that are open on the conical outer surface of the elevating body and connected to the annular air chamber,
The discharge container opening and closing device for a powder container according to claim 1. The lifting body
With an elastic layer on the outside of the conical body,
The discharge container opening and closing device for a powder container according to claim 1 or 2. The injection nozzle
A hollow male screw standing on the conical body and communicating with the annular air chamber and penetrating the elastic layer;
A nut that is screwed into the hollow male screw and presses and fixes the elastic layer,
The discharge container opening and closing device for a powder container according to claim 3.

Images