Powder filling device

Abstract

To provide a filling device capable of obtaining a high filling rate in a short time.SOLUTION: In a powder filling device having a pedestal 1, a vibration table 2 on which a formwork 6 is placed, vibration means 4 for imparting vibration to the powder stored in the formwork 6, and an elastic body 3 disposed between the vibration table 2 and the pedestal 1 to support the vibration table, a through hole 8 is formed in the vibration table 2, a descent restriction member 7 for regulating a descent position of the vibration table 2 is erected on an upper surface of the pedestal 1, the descent restriction member 7 is disposed to pass through the through hole 8.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a powder filling apparatus.

[0002] One method for obtaining a molded body made from soil, sand, gravel, or hard-mixed concrete with little moisture (hereinafter referred to as the "filler") is to fill the filler into a formwork and then vibrate the formwork to compact the filler.

[0003] Patent Document 1 discloses a concrete compaction vibration table 30, as shown in FIG. 14, for the purpose of providing a powder filling device that can vibrate and compact concrete in a short time with low vibration and noise. The table 20 is formed by connecting a pair of left and right individual tables 21A, 21B, each of whose ends is supported and fixed on a foundation via vibration-isolating rubber 24, together at their center by a connecting plate 22, and a single vibrator 26 is installed on the underside of the center of the connecting plate 22. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-285821 Summary of the Invention [Problem to be solved by the invention]

[0005] When using conventional powder filling devices, there was a problem that it took a long time to increase the filling rate of the material to be filled, and it was not possible to obtain a high filling rate. An object of the present invention is to provide a powder filling apparatus that can obtain a high filling rate in a short time. [Means for solving the problem]

[0006] The present invention, which solves the above problems, relates to a powder filling device as described below. A stand and a vibration table on which the formwork is placed; a vibration means for applying vibration to the powder contained in the mold; an elastic body disposed between the vibration table and the base and supporting the vibration table; A powder filling apparatus having a through hole is formed in the vibration table, a descent restriction member that restricts the descent position of the vibration table is provided on the top surface of the frame, The downward restriction member is disposed so as to pass through the through hole. And, When the vibration means starts vibrating, the height of the top end of the descent restricting member is defined as h1, and the height of the upper surface of the vibration table is defined as h2, where h2>h1, and the value A of the difference (h2-h1) can be adjusted by adjusting the height (h1) of the top end of the descent restricting member. A powder filling device characterized by: [Effects of the Invention]

[0007] By using the powder filling apparatus of the present invention, a molded body having a high filling rate can be obtained in a short time. [Brief explanation of the drawings]

[0008] [Figure 1] Figure 1 is a schematic diagram showing an embodiment of a powder filling device of the present invention, where Figure 1A is a front view and Figure 1B is a side view. [Figure 2] 2A and 2B are schematic diagrams showing a state in which the top end of the descent restricting member abuts against the bottom plate of the mold in the powder filling apparatus of the present invention, where Fig. 2A is a front view and Fig. 2B is a side view. [Figure 3] FIG. 3 is a diagram showing an example of the arrangement of various members constituting the powder filling device of the present invention. [Figure 4] FIG. 4 is a diagram schematically showing the vibration state of the vibration table and the mold in the powder filling apparatus shown in FIG. [Figure 5] FIG. 5 is a diagram showing an example of a mounting structure for a downward restriction member in the powder filling apparatus of the present invention. [Figure 6] FIG. 6 is a diagram showing an example of a mounting structure for a downward restriction member in the powder filling apparatus of the present invention. [Figure 7]FIG. 7 is a diagram showing an example of a mounting structure for a downward restriction member in the powder filling apparatus of the present invention. [Figure 8] FIG. 8 is a diagram showing an example of a mounting structure for a downward restriction member in the powder filling apparatus of the present invention. [Figure 9] 9A and 9B are diagrams showing an example of a powder filling apparatus according to the present invention in which a vibrator is attached to a mold, where Fig. 9A is a front view and Fig. 9B is a side view. [Figure 10] FIG. 10 is a diagram showing an example of the powder filling device of the present invention, in which a pressure device is provided. [Figure 11] FIG. 11 is a diagram showing an example of the powder filling apparatus of the present invention, in which a mold without a bottom plate is used as the mold. [Figure 12] Figure 12 is a schematic diagram showing the structure of a typical powder filling device, where Figure 12A is a front view and Figure 12B is a side view. [Figure 13] FIG. 13 is a diagram showing a schematic view of the vibration state of the vibration table and the mold in the powder filling apparatus shown in FIG. [Figure 14] FIG. 14 is a diagram showing a conventional powder filling device. DETAILED DESCRIPTION OF THE INVENTION

[0009] Before describing the powder filling apparatus of the present invention, a conventional general powder filling apparatus will be described with reference to FIGS. In explaining the function and effect of the downward movement restricting member of the present invention, first, a general powder filling device that does not have such a downward movement restricting member will be explained.

[0010] FIG. 12 is a schematic diagram of a commonly used powder filling device, where FIG. 12A is a front view and FIG. 12B is a side view. The base 1 and the vibration table 2 are connected by an elastic body 3 such as a vibration-isolating rubber or spring, and this elastic body supports the vibration table 2. A vibrator 4 is attached to the underside of the vibration table 2, and when this vibrator 4 is operated, the vibration table 2 vibrates. Furthermore, the vibration of the vibration table 2 is absorbed by the elastic body 3, preventing the vibration from being transmitted to the base 1.

[0011] When a rigid formwork 6 containing filling material 5 is placed on this vibration table 2 and the vibrator 4 is operated, the vibration table 2 vibrates mainly up and down, and the formwork 6 vibrates in the same manner. The vibration state of the vibration table 2 and formwork 6 at this time can be schematically represented as a sine curve in a graph shown in Figure 13, with the vertical axis representing amplitude and the horizontal axis representing time.

[0012] The vibration causes the vibration table 2 and formwork 6 to move up and down, and the acceleration of this movement reaches a maximum when the sine curve crosses the center line L, and decreases as the sine curve approaches the ascending or descending end, at which point the acceleration becomes zero. During vibration, the formwork 6 and the filling material 5 within the formwork 6 move up and down, each with inertia proportional to the acceleration. For example, when the vibration table 2 descends and then begins to rise at the descending end, the formwork 6 follows the vibration table 2, decreasing its acceleration, and then reaches zero at the descending end before gradually increasing its acceleration as it rises.

[0013] The formwork 6 and the filling material 5 inside the formwork 6 are made of materials with different specific gravities, etc., and even when the formwork 6 reaches the end of its downward movement and its acceleration becomes zero, the filling material 5 still has inertia that causes it to descend. This inertial force presses the filling material 5 against the bottom plate of the formwork 6 at the end of its downward movement, increasing the filling rate. In this way, the formwork 6 repeatedly rises and falls due to vibration, and each time the formwork 6 changes its movement from rising to falling at the end of its upward movement and from falling to rising at the end of its downward movement, the filling rate of the filling material 5 gradually increases due to the inertia of the filling material 5.

[0014] In the above-mentioned general vibration, just before the form 6 changes from descending to ascending or from ascending to descending, the acceleration of the form 6 is already small, and the inertia generated in the material 5 to be filled in proportion to the acceleration is also small, so the force that increases the filling rate of the material 5 to be filled is small, and the increase in filling rate is also small. As a result, if an attempt is made to increase the filling rate, the time for repeating vibration becomes longer, and there is a technical problem that even if the vibration is continued for a long time, a high filling rate cannot be obtained due to insufficient inertial force.

[0015] The present invention solves the above technical problems. An example of an embodiment of the powder filling device of the present invention is shown in FIG. FIG. 1A is a front view of the powder filling apparatus, and FIG. 1B is a side view of the powder filling apparatus.

[0016] As shown in FIG. 1A, a downward movement restricting member 7 is fixed to the upper surface of the stand 1 with bolts or the like. In this embodiment, in order to adjust the height of the descent restricting member 7, a spacer 9 made of a rigid body for adjusting the height is inserted between the mounting portion of the descent restricting member 7 and the base 1. The mounting structure of the spacer 9 will be described later. On the other hand, a through hole 8 is formed in the vibration table 2 at a position corresponding to the downward movement restricting member 7 , so that the downward movement restricting member 7 can pass through the through hole 8 .

[0017] When the vibrator 4 is stopped, the descent restricting member 7 is positioned in a through hole 8 opened in the vibration table 2 at a length such that the top end of the descent restricting member 7 is positioned slightly below the upper surface of the vibration table 2. Dimension A in FIG. 1A indicates the difference in height between the top end of the downward movement restricting member 7 and the upper surface of the vibration table 2.

[0018] An example of the mounting position of the downward movement restricting member 7 in the powder filling device is shown in FIG. 3 is a top view of the vibration table 2. Four elastic bodies 3 are arranged at the four corners of the vibration table 2, and four through holes 8 are provided on the outside of the vibrator 4, and the descent restriction members 7 are arranged to pass through these through holes 8.

[0019] When a rigid formwork 6 containing filling material 5 is placed on the vibration table 2, as shown in FIG. 1A, the elastic body 3 bends slightly under the weight of the formwork 6, shortening the gap (dimension H) between the top surface of the frame 1 and the bottom surface of the vibration table 2. Dimension H changes depending on the weight of the formwork 6. Therefore, when the formwork 6 is filled with filling material 5, the height of the descent restriction member 7 is adjusted so that dimension A remains at an appropriate value of 2 to 5 mm.

[0020] When the vibrator 4 is operated in this state, the vibration table 2 and formwork 6 vibrate in a manner schematically shown by a sine curve, as described above. However, even if the vibration table 2 is lowered to a position below the top of the descent restricting member 7, the formwork 6 collides with the top of the descent restricting member 7 and is prevented from descending.

[0021] When the formwork 6 collides with the top edge of the descent restricting member 7, the acceleration of the descent of the formwork 6 is still large, and the filling material 5 inside the formwork 6 has a large inertia that tries to descend. As a result, a larger inertial force presses the filling material 5 toward the bottom of the formwork compared to when filling using a general vibration table that is not equipped with a descent restricting member 7, and the filling rate of the filling material 5 increases. In this way, a larger inertial force acts, and therefore, for the same filling rate, a required filling rate can be obtained with a shorter vibration time. Alternatively, a higher filling rate can be obtained.

[0022] The function of this downward movement restricting member 7 will be explained with reference to FIG. 4, which shows a sine curve that schematically indicates vibration. As the vibration table 2 and formwork 6 move from the ascending end of the vibration to the descending end, the acceleration of the vibration increases, reaching a maximum as they cross the center line L, and then the acceleration gradually decreases as they move toward the descending end. Immediately after crossing the center line L, the formwork 6 collides with the top edge of the descent restriction member 7, and at this moment its descent stops, reaching the state shown by the solid line. However, the vibration table 2 continues to descend along the sine curve as shown by the dashed line to the descending end, then rises, collides with the formwork 6, and rises together with it.

[0023] Figure 2 shows a schematic diagram of the state when the formwork 6 collides with the top of the descent-restricting member 7 and stops descending, and the vibration table 2 continues to descend until it reaches the end of its downward movement and begins to rise. FIG. 2A is a front view of the powder filling apparatus, and FIG. 2B is a side view. Dimension B in FIG. 2A indicates the difference in height between the upper surface of the vibration table 2 and the lower surface of the formwork 6. The height of the downward movement restricting member 7 is adjusted so that the dimension B is about 0.3 to 3 mm.

[0024] When the formwork 6 collides with the descent restricting member 7, the acceleration of the formwork 6's descent is still large, and the material 5 to be filled at that position has greater inertia than when filling on the vibration table 2 without the descent restricting member 7, and the moment the formwork 6 collides with the descent restricting member 7, a large inertial force acts on the material 5 to move toward the bottom of the formwork 6, increasing the filling rate. In other words, the role of the descent restricting member 7 is to forcibly stop the descent of the formwork 6 at the point when the material 5 to be filled has a large amount of inertia.

[0025] When comparing a powder filling device equipped with this descent restricting member 7 with a general powder filling device not equipped with the descent restricting member 7, the powder filling device equipped with the descent restricting member 7 requires a shorter vibration time to obtain the same filling rate of the material 5 to be filled. This results in saving energy to operate the vibrator 4. Furthermore, it becomes possible to increase the filling rate of the material 5 to be filled without increasing the energy of the vibrator 4.

[0026] FIG. 5 is a diagram showing the mounting structure of the spacer 9 shown in FIG. 1A. A screw hole 12 is formed in the lower part of the descent restricting member 7, and the screw portion 10b of the fixing bolt 10 is screwed into this screw hole 12 via the base 1, thereby erecting the descent restricting member 7 on the top surface of the base 1. The height of the descent restricting member 7 can be adjusted by disposing a spacer 9 having an appropriate dimension (height) between the upper surface of the base 1 and the descent restricting member 7.

[0027] FIG. 6 is a diagram showing another example of the spacer mounting structure. A threaded portion 11 is formed at the bottom of the descent restricting member 7 , and the descent restricting member 7 is erected on the upper surface of the base 1 by threading this threaded portion 11 into a nut 14 via the base 1 . The height of the descent restricting member 7 can be adjusted by disposing a spacer 9 having an appropriate dimension (height) between the upper surface of the base 1 and the descent restricting member 7.

[0028] Other means for adjusting the height of the downward restriction member 7 are shown in FIGS. 7 and 8 show a device in which the height of the descent restricting member 7 is adjusted by attaching a cap member 13 made of a rigid body having an appropriate height (thickness) to the top end of the descent restricting member 7.

[0029] In the example shown in Figure 7, a screw hole 12 is formed at the bottom of the descent restricting member 7, and the screw portion 10b of the fixing bolt 10 is screwed into this screw hole 12 via the base 1, thereby causing the descent restricting member 7 to stand on the top surface of the base 1. A screw hole 12 is formed in the upper part of the descent restricting member 7, while a screw portion 11 is formed in the lower part of the cap member 13. The height of the descent restricting member 7 can be adjusted by attaching the cap member 13 by screwing the screw portion of the cap member 13, which has an appropriate dimension (height), into the screw hole 12 in the upper part of the descent restricting member 7.

[0030] The one shown in Figure 8 has a threaded portion 11 formed at the bottom of the descent restricting member 7, and by screwing this threaded portion 11 into a nut 14 via the base 1, the descent restricting member 7 is erected on the top surface of the base 1. A screw hole 12 is formed in the upper part of the descent restricting member 7, while a screw portion 11 is formed in the lower part of the cap portion. The height of the descent restricting member 7 can be adjusted by attaching a cap member 13 having an appropriate dimension (height) by screwing the screw portion of the cap member into the screw hole 12 in the upper part of the descent restricting member 7.

[0031] 1 to 3 show an embodiment in which a vibrator 4 is attached to a vibration table 2. In FIG. The vibrator 4 can also be attached to the formwork 6 as shown in FIG. FIG. 9A is a front view of a powder filling machine in which vibrators are attached to the left and right sides of a mold 6, and FIG. 9B is a side view thereof. When the vibrators 4 are attached to the left and right sides of the formwork and vibrated, the vibration of the formwork 6 is transmitted to the vibration table 2, causing the vibration table 2 to vibrate mainly up and down. In this case, too, the effect of providing the descent restriction member 7 can be obtained, just as in the case where the vibrators 4 are attached to the vibration table 2.

[0032] The powder filling device of the present invention may also use a combination of vibrator 4 as filling means and pressure means for pressing the powder contained in mold 6 from above with a press. FIG. 10 is a diagram showing an embodiment in which the vibrator 4 and the pressurizing means are used in combination. In the example shown in Fig. 10, a press cylinder 15 is fixed by a support girder 16. The press cylinder 15 lowers a pressure girder 17, which is a pressure device, and presses a press die 18 attached to the pressure girder 17 against the powder material in the vibrating mold 6, thereby compressing and molding the powder material.

[0033] In the above embodiment, an example has been described in which a formwork having a bottom plate is used as the formwork. When a mold without a bottom plate is used as the mold in the powder filling apparatus of the present invention, as shown in Figure 11, a molding pallet 19 is placed on the vibration table 2, and the mold 6 without a bottom plate is placed on this molding pallet 19. Then, using the molding pallet 19 as the bottom plate of the mold 6, powder is supplied into the mold 6 and the vibration table 2 is vibrated, thereby filling the powder into the mold.

[0034] As mentioned above, the action of the "descent restriction member" placed through the through-hole in the vibration table can increase the filling rate of the fill material in the formwork in a shorter time, or even achieve a higher filling rate. In this way, simply by adding an inexpensive part to the vibration table, it is possible to reduce the energy required for vibration, which is a major advantage.

[0035] The present invention relates to the powder filling device described below in (1), but also includes the following embodiments (2) to (10). (1) a stand; a vibration table on which the formwork is placed; a vibration means for applying vibration to the powder contained in the mold; an elastic body disposed between the vibration table and the base and supporting the vibration table; A powder filling apparatus having a through hole is formed in the vibration table, a descent restriction member that restricts the descent position of the vibration table is provided on the top surface of the frame, The downward restriction member is disposed so as to pass through the through hole. A powder filling device characterized by: (2) The powder filling apparatus according to (1) above, wherein the vibration means is attached to the vibration table, and the vibration means vibrates the vibration table to impart vibration to the powder contained in the mold. (3) A powder filling apparatus as described in (1) above, wherein the vibration means is attached to the mold and imparts vibration to the powder contained in the mold by vibrating the mold using the vibration means. (4) The powder filling device according to any one of (1) to (3) above, further comprising a pressurizing means for applying pressure from above to the powder contained in the mold. (5) A powder filling apparatus according to any one of (1) to (4) above, in which a formwork without a bottom plate is used as the formwork, a molding pallet is placed on the vibration table, and the formwork without a bottom plate is placed on the molding pallet. (6) A powder filling device described in any one of (1) to (5) above, wherein the descent regulating member is erected on the top surface of the stand by screwing the threaded portion of a fixing bolt through the stand into a screw hole formed in the descent regulating member. (7) A powder filling device described in any one of (1) to (5) above, wherein the descent regulating member is erected on the upper surface of the base by threading a screw portion formed on the lower part of the descent regulating member into a screw hole of a fixing nut via the base. (8) A powder filling device as described in any one of (1) to (5) above, in which the height of the descent regulating member is adjusted by inserting a spacer for adjusting the height of the descent regulating member between the lower end of the descent regulating member and the upper surface of the stand. (9) A powder filling device as described in any one of (1) to (5) above, in which the height of the descent regulating member is adjusted by attaching a cap member for adjusting the height of the descent regulating member to the upper end of the descent regulating member. (10) The powder filling device according to any one of (1) to (9) above, wherein the descent restricting member is made of iron or resin. (11) The powder filling device according to any one of (1) to (10) above, wherein the elastic member is one selected from the group consisting of a rubber column, a metal spring, and an air spring. [Explanation of symbols]

[0036] 1 Mounting stand 2. Shaking table 3 Elastic bodies 4 Vibration means, vibrator 5 Filled material 6. Formwork 7. Lowering restriction member 8 through holes 9 spacers 10 Fixing bolt 10a Screw head of fixing bolt 10b Threaded part of fixing bolt 11 Threaded part 12 screw holes 13 Cap member 14 Nut 15 Press cylinder 16 Support girder 17 Pressure beam, pressure device 18 Press mold 19 Molded Pallets 20 tables 21A, 21B Single table 22 Connecting plate 23 Separation stand 24 Anti-vibration rubber 25 Mounting plate 26 Vibrator 30 Vibration table for concrete compaction

Claims

1. A stand and a vibration table on which the formwork is placed; a vibration means for applying vibration to the powder contained in the mold; an elastic body disposed between the vibration table and the base and supporting the vibration table; A powder filling apparatus having a through hole is formed in the vibration table, a descent restriction member that restricts the descent position of the vibration table is provided on the top surface of the frame, the descent restricting member is disposed so as to pass through the through hole, When the vibration means starts vibrating, the height of the top end of the descent restricting member is defined as h1, and the height of the upper surface of the vibration table is defined as h2, and h2>h1, and the value A of the difference (h2-h1) can be adjusted by adjusting the height of the top end of the descent restricting member. A powder filling device characterized by:

2. 2. The powder filling apparatus according to claim 1, wherein said vibration means is attached to said vibration table, and said vibration means vibrates said vibration table to impart vibration to the powder contained in said mold.

3. 2. The powder filling apparatus according to claim 1, wherein said vibration means is attached to said mold, and said vibration means vibrates said mold to impart vibration to the powder contained in said mold.

4. 4. The powder filling device according to claim 1, further comprising a pressurizing means for pressurizing the powder contained in the mold from above.

5. 5. The powder filling apparatus according to claim 1, wherein a mold without a bottom plate is used as the mold, a molding pallet is placed on the vibration table, and the mold without a bottom plate is placed on the molding pallet.

6. 6. The powder filling device according to claim 1, wherein the descent restricting member is erected on the upper surface of the base by threading a threaded portion of a fixing bolt into a screw hole formed in the descent restricting member via the base.

7. 6. The powder filling device according to claim 1, wherein the descent restricting member is erected on the upper surface of the base by threading a screw portion formed on a lower portion of the descent restricting member into a screw hole of a fixing nut via the base.

8. 6. A powder filling device according to claim 1, wherein the height of the descent restricting member is adjusted by inserting a spacer for adjusting the height of the descent restricting member between the lower end of the descent restricting member and the upper surface of the stand.

9. 6. The powder filling device according to claim 1, wherein the height of the descent restricting member is adjusted by attaching a cap member for adjusting the height of the descent restricting member to an upper end of the descent restricting member.

10. 10. The powder filling device according to claim 1, wherein the downward movement restricting member is made of iron or resin.

11. 11. The powder filling device according to claim 1, wherein the elastic body is one selected from the group consisting of a rubber column, a metal spring, and an air spring.

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