JP5536302B2 - Screw type material feeder - Google Patents

Description

  The present invention accommodates, for example, a powdery powder material such as powder paint, foundation, flour, etc. in a hopper, and the contained powder material is discharged from the front of the trough casing by rotating screw blades. The present invention relates to a screw-type material supply device for supplying a predetermined amount of powder material to a next process such as a molding machine.

  In general, this type of screw-type material supply device is provided with a trough casing having an open end in a lateral direction below a hopper that accommodates a powder material, and a base end side of the trough casing as a drive source. A rotating shaft that is connected and has spiral screw blades in the axial direction is provided, and the powder material in the hopper is discharged from the discharge port at the tip of the trough casing by the screw blade that rotates together with the rotating shaft. Become.

  Specifically, by rotating the rotating shaft, the screw blades co-rotated with the rotating shaft lift the powder material in the circumferential direction of the trough casing. After moving to the upper part in the casing, it falls as a lump, is transported forward while being swept up again in the circumferential direction, and is eventually discharged from the discharge port at the tip of the trough casing.

  However, when the discharge of the powder material is stopped, that is, when the rotation of the rotary shaft is stopped, the powder material immediately before being discharged is located at the tip of the screw blade near the discharge port of the trough casing. Since a small amount of vibration or the like occurs, the lump near the discharge port collapses, and the collapsed amount of powder material drips from the discharge port to a molding machine or the like. As a result, there is a problem that the powder material cannot be supplied accurately.

  Therefore, in recent years, a screw-type material supply device has been developed that includes a valve fitting that opens and closes the discharge port in accordance with the rotation of the rotary shaft or screw blades at the discharge port of the trough casing (for example, Patent Document 1). reference.).

  That is, when the rotary shaft or screw blade rotates, the valve fitting opens the trough casing discharge port to discharge the powder material, while when the rotary shaft or screw blade stops, the discharge port opens the discharge port. Close.

Therefore, according to the screw type material supply device provided with such a valve fitting, when the discharge of the powder material is stopped, that is, when the rotation of the rotating shaft is stopped, the valve fitting is connected to the outlet of the trough casing. Therefore, it can be expected that the powder material immediately before being discharged prevents dripping from the discharge port.
JP-A-8-281194

  However, the screw-type material supply device provided with this valve fitting also has the following problems.

  As described above, in this type of screw-type material supply device, the rotating screw blades lifted the powder material in the circumferential direction of the trough casing, and the lifted powder material was moved to the upper position in the trough casing. After that, it falls as a lump, is transported forward while being swung up again in the circumferential direction, and is eventually discharged from the discharge port at the tip of the trough casing.

  Specifically, since the powder material discharged from the discharge port is pushed by the powder material sequentially transferred and discharged from the discharge port, the powder material discharged from the discharge port is: It is discharged in a so-called pulsating intermittent state.

  Therefore, even in the screw-type material supply device provided with the valve fitting, the amount of the powder material is not uniform when the discharge of the powder material is stopped, that is, immediately before the valve fitting is closed. There was a problem that it could not be discharged smoothly and supplied to a molding machine or the like.

  An object of the present invention is to solve such a problem. Even when the rotation of the rotating shaft is stopped, the powder material can be prevented from dripping from the discharge port, and the powder material can be uniformly distributed from the discharge port. A screw-type material supply device capable of discharging smoothly and accurately supplying a desired amount of powder material to a molding machine or the like is provided.

In order to achieve the above object, a screw-type material supply device according to claim 1 is provided with a trough casing having an open end in a lateral direction below a hopper that accommodates a powder material, and in the trough casing, A rotating shaft having a proximal end connected to a driving source and a spiral screw blade arranged in the axial direction is provided, and the rotation of the rotating shaft causes the powder material in the hopper to be discharged from the discharge port at the tip of the trough casing. In the screw-type material supply device for discharging, a rotary presser lid that is arranged at the discharge port and through which the rotation shaft passes, and that can seal the discharge port of the trough casing, and the rotation through the axial hole of the presser lid is fixed to the extended portion of the rotary shaft which extends in the front, between the spring receiving portion that is rotated shared with the rotary shaft, and said spring receiving portion and the rotating presser lid Intervening Coupled thereto Te, wherein the rotating pressing lid and resilient spring formed by elastically biased toward the discharge opening, provided with a on the surface of the sealing side of the rotating presser lid periphery from the shaft hole A plurality of straight or curved grooves are formed radially toward the inner surface, and the spring receiving portion has a screw groove that can be screwed into a screw portion formed from the distal end side of the extending portion of the rotating shaft. The elastic spring connects the spring receiving portion and the rotary presser lid so as to elastically urge the rotary presser lid equally , and the extended portion is inserted through the elastic spring . A bellows-like elastic rubber.

  Specifically, when the drive source is driven, the rotation shaft rotates and the screw blades transfer the powder material to the front of the trough casing.

  The powder material sent to the discharge port of the trough casing stays with the discharge restricted by the elastically biased rotary presser lid, but the elasticity of the elastic spring is caused by the pressure of the powder material sent out sequentially. Against the force, the rotary presser lid is pushed open to form a gap between the outlet and the rotation of the rotary presser lid allows the powder material to be crushed like a stone mortar and smoothly from the gap. To be discharged.

  On the other hand, when a predetermined amount of the powder material is discharged and the drive source is stopped and the rotary shaft is stopped, the delivery of the powder material is stopped simultaneously.

  Therefore, the pressure of the powder material that is sent out disappears, and the elastic force of the elastic spring prevails. With the elastic force of this elastic spring, the rotary presser lid seals the outlet of the trough casing, and the powder material Sag (dripping) can be prevented.

The present invention has the following effects.
According to the screw-type material supply device of the first aspect, the rotary presser lid that rotates together with the rotating shaft discharges the powder material while pulverizing the powder material by the elastic force of the elastic spring. When the discharge of the powder material is stopped, the rotary presser lid seals the discharge port by the elastic force of the elastic spring when the discharge of the powder material is stopped. Sag (dripping) can be prevented.

  Therefore, according to the present invention, the rotary presser lid that is elastically biased toward the discharge port and rotates is provided at the discharge port, so that the powder material droops from the discharge port even when the rotation of the rotating shaft is stopped. In addition to preventing the powder material from falling, the powder material can be uniformly and smoothly discharged from the discharge port while being pulverized, so that a desired amount of the powder material can be accurately supplied to a molding machine or the like by these cooperation.

Further , since the elastic spring is connected so as to elastically bias the outer surface of the rotary presser cover evenly, the rotary presser cover reliably seals the discharge port simultaneously with the stop of the rotary shaft, and the powder material It is possible to reliably prevent dripping (sagging).

  Hereinafter, the screw type material supply device of the present invention is explained based on a drawing. 1 to 4, common portions are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a partially cutaway side view showing an embodiment of a screw-type material supply apparatus A according to the present invention. 2 is an operation diagram in a cross-sectional state in which a main part of FIG. 1 is partially enlarged. FIG. 2 (a) is an operation diagram in a state where a rotary presser lid closes a discharge port, and FIG. 2 (b) is a rotation diagram. The operation | movement figure in the state which the presser cover opened the discharge port is shown, respectively.

The screw-type material supply device A is provided with a trough casing T having an open front end in a lateral direction below a hopper H that accommodates a powder material P, and a base end side in the trough casing T as a drive source. A rotating shaft S connected to M and having spiral screw blades W arranged in the axial direction is provided, and the powder material P in the hopper H is discharged from the tip of the trough casing T by the rotation of the rotating shaft S. To discharge from T1,
Specifically, the rotary presser lid 1 that can be disposed at the discharge port T1 and that can open the shaft hole 11 through which the rotary shaft passes, and that can seal the discharge port T1 of the trough casing T, and the rotary presser lid 1 The spring shaft extends through the shaft hole 11 to the front, and is fixed to the extended portion S1 of the extended rotation shaft S so as to rotate together with the rotation shaft S. 2 and an elastic spring 3 that is interposed and connected between the spring receiving portion 2 and the rotary presser lid 1 and elastically biases the rotary presser lid 1 toward the discharge port T1.

  Here, the powder material P is meant to include powder, granules, fine thin pieces, short fiber pieces, etc., and any material can be used as long as it can be discharged by the apparatus A. Specifically, Cosmetic materials such as powder paints and foundations, or food materials such as flour are used.

  The hopper H is formed in a box shape or a cylindrical shape capable of accommodating the powder material P, and a rotating gear R2 having gears R1,... And a stirring member R in which a rod-like or plate-like stirring blade R3 is connected to the rotating gear R2.

  Therefore, the rotating gear R2 of the stirring member R rotates with the rotation of the screw blade W, and the stirring blade R3 connected to the rotating gear R2 stirs the powder material P in the hopper H while trough the casing. It can be smoothly dropped onto T.

  In addition, about the trough casing T made into the horizontal direction under the hopper H, it is the same as that of the past, and since it does not require description in particular, it abbreviate | omits.

  The rotary presser lid 1 is formed in a cylindrical shape having substantially the same outer diameter as the discharge port T1 of the trough casing T in which the shaft hole 11 through which the extending portion S1 of the rotary shaft S is penetrated is formed. Is arranged adjacent to the front of the discharge port T1 of the trough casing T, and the discharge port T1 is sealed on one side of the rotary presser lid 1.

  One surface (the surface on the sealing side) of the rotary presser lid 1 may be a mere flat surface. For example, as shown in FIGS. 3 (a) and 3 (b), it is radial from the shaft hole 11 toward the outer periphery. It is also possible to form a linear or curved groove portion 12 on the surface, and by forming such a groove portion 12, the rotary presser lid 1 elastically biased toward the discharge port T1 and the discharge port T1 The powder material P discharged from the gap can be discharged more smoothly while being pulverized.

  In the trough casing T, a rotating shaft S having a proximal end connected to the driving source M and having spiral screw blades W arranged in the axial direction is inserted. The rotating shaft S is connected to the trough casing T. An extension portion S1 extending further forward than the discharge port T1 is provided, and the tip of the extension portion S1 is fitted to the bearing portion S2 to be rotatable.

  The bearing portion S2 is formed with a screw portion on the outer peripheral surface and screwed into the side wall of the discharge portion, and the elastic force of the elastic spring 3 can be easily adjusted by adjusting the screwing of the screw portion. .

  The extension portion S1 of the rotating shaft S is integrally formed with a spring receiving portion 2 that rotates together with the rotating shaft S.

  For example, the spring receiving portion 2 is formed by integrally forming an annular protrusion at an appropriate position of the extended portion S1, or a screw portion (not shown) from the distal end side of the extended portion S1, and the screw portion ( An annular body (not shown) provided with a thread groove (not shown) that can be screwed into the inner wall is formed separately from the distal end side of the extending portion S1. It is also possible to form the spring receiving portion 2 that is screwed together and integrated with the extending portion S <b> 1 to rotate together with the rotating shaft S.

  Moreover, in the case of an annular body (not shown) having such a screwed structure, after the annular body (not shown) is screwed, a nut (not shown) is further screwed from the distal end side of the extending portion S1. Thus, the annular body (not shown) can be prevented from loosening and its position can be regulated.

  For this reason, according to the annular body (not shown) having this screwing structure, the position of the spring receiving portion 2 can be specified, so that it is connected via the elastic spring 3 only by specifying the position of the spring receiving portion 2. The position of the rotary presser lid 1 can be easily finely adjusted.

  An elastic spring 3 such as a coil spring that is externally inserted into the extending portion S 1 is connected between the spring receiving portion 2 and the rotary presser lid 1, and the rotary presser is supported by the elastic force of the elastic spring 3. The lid 1 is elastically biased toward the discharge port T1.

  The elastic spring 3 is not limited to the coil spring, and can be adopted as long as it has a structure capable of elastically urging the rotary presser cover 1 toward the discharge port T1.

  For example, FIGS. 4A and 4B are perspective views showing another embodiment of the elastic spring 3. In FIG. 4A, the spring receiving portion 2 and the rotary presser lid are used as the elastic spring 3. FIG. A plurality of leaf springs are connected to 1 so as to elastically bias the outer surface of the rotary presser lid 1 evenly.

  Further, in FIG. 4B, as the elastic spring 3, an elastic rubber formed in a bellows shape is connected between the spring receiving portion 2 and the rotary presser lid 1, and the outer surface of the rotary presser lid 1 is evenly elastic. It is trying to be energized.

  According to the elastic spring 3 having such a structure, the rotary presser lid 1 can be surely pressed toward the discharge port T1 to seal the discharge port T1, so that the powder material P is surely dripped (dripped). Can be prevented.

  The screw-type material supply device A of the present invention configured as described above operates as follows.

That is, when the drive source M is driven, the rotary shaft S is rotated, and the screw blade W of the rotary shaft S is also rotated to transfer the powder material P in the hopper H to the front of the trough casing T1 [(FIG. 2). (See (a).)
The powder material P sent to the discharge port T1 of the trough casing T is restricted from being discharged by the rotary presser cover 1 elastically biased by the elastic spring 3 and stays at the discharge port T1, but is sequentially sent out. A gap is formed between the rotary presser lid 1 and the discharge port T1 while the rotary presser cover 1 is pushed open against the elastic force of the elastic spring 3 by the pressure of the powder material P that comes, The rotation of the rotary presser lid 1 allows the uniform powder material P1 pulverized from the gap to be smoothly discharged while pulverizing the powder material P like a stone mill.

  On the other hand, when a predetermined amount of the powder material P1 is discharged, when the drive source M is stopped and the rotary shaft S is stopped, the delivery of the powder material P is stopped simultaneously.

  Therefore, the pressure of the delivered powder material P is lost, and the elastic force of the elastic spring 3 prevails, and the rotary holding lid 1 seals the discharge port T1 of the trough casing T by the elastic force of the elastic spring 3. Thus, the powder material P is prevented from sagging (dripping).

  Thus, according to the screw-type material supply device A of the present invention, the rotary presser lid 1 that rotates together with the rotary shaft T discharges the powder material P while being crushed by the elastic force of the elastic spring 3. The uniform powder material P1 can be discharged smoothly in a continuous state, and when the discharge of the powder material P is stopped, the rotary presser lid 1 is simultaneously pressed by the elastic force of the elastic spring 3 when the rotary shaft T is stopped. The discharge port T1 can be sealed to prevent the powder material P from dripping (dripping).

  Therefore, according to the present invention, even if the rotation of the rotating shaft T is stopped, the powder material P can be prevented from dripping from the discharge port T1, and the powder material P can be pulverized uniformly and smoothly. Since the material P1 can be discharged from the discharge port T1, a desired amount of the powder material P (P1) can be accurately supplied to a molding machine or the like by the cooperation of these materials.

  FIG. 5 is a partial enlarged cross-sectional view of the main part showing another embodiment of the screw-type material supply device A according to the present invention.

  In addition, the same code | symbol is attached | subjected to the site | part which is common in FIGS. 1-4, and only the characteristic of a present Example is demonstrated here.

  This screw-type material supply device A has a structure in which a rotary presser lid 1a formed of an elastic member and capable of sealing the discharge port T1 of the trough casing T is disposed at the discharge port T1 at the tip of the rotation shaft T. Yes.

  That is, in the screw-type material supply device A, a rotary presser lid 1a in which an elastic member such as rubber or sponge is formed in a plate shape is fixed to the tip of the rotary shaft S, and the rotary presser lid 1a is shared with the rotary shaft S. The structure is configured to be rotated and elastically biased toward the discharge port T1.

  Therefore, in this screw-type material supply device A, the powder material P presses the rotary presser lid 1a against the elastic force of the rotary presser lid 1a by the pressure of the powder material P that is sequentially sent out. While the discharge path 1b is formed, the uniform powder material P1 pulverized through the discharge path 1b is smoothly discharged while the powder material P is pulverized like a stone mill by the rotation of the rotary presser lid 1a.

  On the other hand, when a predetermined amount of the powder material P1 is discharged, when the drive source M is stopped and the rotary shaft S is stopped, the delivery of the powder material P is stopped at the same time, and the pressure of the delivered powder material P is reduced. The elastic force of the rotary presser lid 1a prevails, and the elastic force of the rotary presser lid 1a seals the outlet T1 of the trough casing T to prevent the powder material P from sagging (dripping). To do.

  As described above, according to the screw-type material supply device A of the present invention, the same effects as those of the first embodiment can be obtained, and the number of parts can be reduced and the structure can be simplified.

It is the side view of the partially broken state which showed one Example of the screw type material supply apparatus A which concerns on this invention. FIG. 2A is an operation diagram in a cross-sectional state in which a main part of FIG. 1 is partially enlarged. FIG. 2A is an operation diagram in a state where the rotary presser lid closes the discharge port, and FIG. The operation | movement diagrams of the state which open | released the exit are each shown. It is a schematic longitudinal cross-sectional view of the state which looked at FIG. 1 from the side. (A), (b) is the front view of the state which looked at the other Example of the rotary presser lid from the discharge outlet side. (A), (b) is the perspective view which showed the other Example of the elastic spring. It is the elements on larger scale of the principal part which showed other Examples of the screw type material supply apparatus A which concern on this invention.

Explanation of symbols

A screw type material supply device P powder material P1 (discharged) powder material H hopper T trough casing T1 discharge port M drive source W screw blade S rotating shaft S1 extending portion 1, 1a rotating presser cover 11 shaft hole 2 Spring receiving part 3 Elastic spring

Claims (1)

A trough casing having an open end is installed in a lateral direction below a hopper that accommodates the powder material, a proximal end side is connected to a driving source in the trough casing, and a spiral screw is formed in the axial direction. In a screw-type material supply device that provides a rotating shaft around a blade, and discharges the powder material in the hopper from the discharge port at the tip of the trough casing by rotation of the rotating shaft.
A rotary presser lid that is disposed at the discharge port and through which the rotation shaft passes, and that can seal the discharge port of the trough casing;
A spring receiving portion that is fixed to the extended portion of the rotary shaft which extends forward, is co-rotating with said rotary shaft through the shaft hole of the rotation retainer lid,
Wherein interposed between the spring receiving portion and said rotating presser lid is coupled to, the rotary pressing lid provided with a resilient spring formed by elastically biased toward the outlet,
A plurality of linear or curved grooves are formed radially from the shaft hole toward the outer periphery on the sealing-side surface of the rotary presser lid,
The spring receiving portion is an annular body provided with an inner wall provided with a screw groove that can be screwed into a screw portion formed from the distal end side of the extending portion of the rotating shaft,
The elastic spring is a screw that is an accordion-like elastic rubber that connects the spring receiving portion and the rotary presser lid so that the rotary presser lid is elastically biased uniformly , and through which the extending portion is inserted. Mold material supply device.

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