JP2005029330A - Canvas mounting structure for powder tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of parts for mounting a canvas, to reduce a weight of a powder tank by suppressing the whole height of the canvas to a low degree and enlarge a loading capacity of the powder in a canvas mounting structure of an air slide type powder tank. <P>SOLUTION: A canvas frame 11 provide on a bottom part in a tank body 1 made of high tension steel sheet is constituted by a vertical wall part 11v and an inclined wall part 11s continued thereto. A plate-like pressing member 14 is fixed onto the inclined wall part 11s by a bolt and a nut 16, 17. An outer peripheral edge of the canvas is clamped and fixed between the inclined wall part 11s and the pressing member 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a canvas mounting structure for an air slide type powder tank.
[0002]
[Prior art]
In a granular material transport vehicle in which a granular material tank for loading granular materials such as cement is mounted on a palm frame, a canvas is laid on the bottom of the granular material tank and loaded on the canvas It has been well known that a powder tank equipped with air slide type discharge means that fluidizes the discharged powder by the pressurized air ejected from the fabric of the canvas and discharges it to the outside. It has been.
[0003]
By the way, as an attachment structure of the canvas of such a conventional powder tank, for example, a powder having an inclined surface that is continuous with a slowing plate extending from the tank side surface on the inner surface of the bottom of the powder tank made of metal plate A fixing material for preventing body deposition is fixed, and a canvas pressing contact material formed separately from the mounting material is pressed against the canvas via bolts, thereby the outer peripheral edge of the canvas. Is fixed to the bottom of the powder tank, and when the powder is fluidized and discharged, the powder is not discharged and remains on the canvas as it is (see Patent Document 1).
[0004]
Moreover, in the powder tank made from an aluminum alloy, what was conventionally formed by extrusion-molding the attachment material for accumulation prevention of the said powder and a tank main body is known (refer patent document 2).
[0005]
[Patent Document 1]
Japanese Patent Publication No. 6-99040 [Patent Document 2]
Japanese Patent Laid-Open No. 10-152227 [0006]
[Problems to be solved by the invention]
However, in the above-mentioned Patent Document 1, an attachment material for preventing accumulation of granular materials is fixed to a side plate of a tank, while a contact material for fixing a canvas is provided separately from the attachment material on the canvas below the attachment material. Because it is provided on the top, the number of parts increases, the workability of canvas installation becomes complicated, and the cost increases. In addition to the fact that the canvas laying position is increased, the weight of the attachment material and the contact material increases. Since the weight of the tank itself is increased, there is a problem that the loading amount of the granular material is reduced. Moreover, in the thing of the said patent document 2, although it is possible to reduce a number of parts by extruding the attachment material for accumulation prevention of a granular material integrally with the tank main body made from an aluminum alloy, The problem of laying position is not solved.
[0007]
The present invention has been made in view of such circumstances, and in the powder tank, the outer peripheral edge of the canvas can be fixed by the canvas frame and the pressing member already installed in the powder tank. An object of the present invention is to provide a canvas mounting structure for a novel granular tank that solves the above-mentioned problems.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1, the canvas is laid on the bottom of the tank main body, and the granular material on the canvas is fluidized by the pressurized air blown out from the mesh of the canvas. In the air slide type powder tank, which is discharged to the outside from the discharge pipe,
A canvas frame provided at the bottom of the tank body is integrally connected to a vertical wall portion fixed to the bottom surface of the tank body and an upper portion thereof, and is connected to a sloping plate fixed to the tank body. And a plate-like pressing member is fastened by fastening means on the inclined wall portion, and the outer peripheral edge portion of the canvas is sandwiched between the pressing member and the inclined wall portion. The first feature is that it is fixed.
[0009]
According to the first feature, in the powder tank, the existing canvas frame is formed by the vertical wall portion and the inclined wall portion, and the plate-like pressing member is fastened to the inclined wall portion by the fastening means. Since the outer peripheral portion of the canvas can be clamped and fixed between the inclined wall portion and the pressing member, the canvas frame has an attachment material for preventing accumulation of granular materials and a canvas fixing device as shown in Patent Document 1 above. It is not necessary to provide an abutting material and an installation space for attaching them, and as a result, the number of parts can be reduced, and the overall height of the canvas is made as low as possible compared to that of Patent Document 1. It is possible to reduce the weight of the entire powder tank and to greatly increase the loading capacity of the powder.
[0010]
In order to achieve the above object, according to a second aspect of the present invention, in the first aspect, the inclined wall portion of the canvas frame is connected to the upper half portion through a step. The lower half is lower than that, and the pressing member is fixed to the lower half by fastening means, and the upper surface of the pressing member and the upper half is substantially flush with the second half. It is a feature.
[0011]
According to the second feature, in addition to the effect of the first feature, the powder in the powder tank is smoothly slid from the sloping plate onto the canvas through the canvas frame provided with the pressing member. In addition, fluidization of the granular material can be promoted, and when the granular material is fluidized, the granular material hardly remains on the canvas frame and the canvas.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the accompanying drawings.
[0013]
1 to 5 show a first embodiment of the present invention. FIG. 1 is a side view of a granular material transport vehicle equipped with a granular material tank equipped with a canvas mounting structure of the present invention, and FIG. FIG. 3 is a partially broken perspective view of the powder tank, FIG. 3 is a cross-sectional plan view of the powder tank, taken along arrow 3 in FIG. 2, and FIG. 4 is a powder tank along line 4-4 in FIG. FIG. 5 is an enlarged partial sectional view taken along line 5-5 of FIG.
[0014]
In FIG. 1, a powder tank T is mounted on a palm frame F of a powder vehicle via a gantry B. The granular material tank T includes a cylindrical tank body 1 that is long in the front-rear direction. The tank main body 1 is formed of a high-tensile steel plate and includes air slide type granular material discharging means.
[0015]
As shown in FIGS. 1 and 2, the bottom wall 1 b of the tank body 1 is inclined downward from the front and rear end portions toward the center portion, and the bottom portion in the tank body 1 is described in detail later. The canvas 10 is laid in tension. The mesh of the canvas 10 is smaller than the size of the particles of the granular material accommodated in the granular material tank. In the tank body 1, there are formed a granular material containing chamber Cp on the canvas 10 and an air chamber Ca below the canvas 10, and an air compressor provided on the palm frame F in the air chamber Ca. The discharge port of Ac is communicated, and pressurized air from the air compressor Ac is pressure-fed into the air chamber Ca. A plurality of manholes 2 that are closed in a sealed manner by the lid 3 are opened on the upper wall of the tank main body 1, and the powder particles are charged and stored in the powder particle storage chamber Cp through these manholes 2.
[0016]
The tank body 1 is provided with a discharge pipe 4 that communicates the granular material storage chamber Cp with the outside, and the suction port 4s of the discharge pipe 4 is curved downward in the granular material storage chamber Cp. The suction port 4 s faces the bottom of the canvas 10 at the center of the tank body 1, and the fluidized powder particles are discharged to the outside through the discharge pipe 4.
[0017]
Next, with reference to FIGS. 1 to 5, the attachment structure of the canvas 10 to the tank body 1 will be specifically described. A canvas frame 11 is fixed to the bottom wall 1 b of the tank body 1. The canvas frame 11 is disposed along the inner peripheral surface of the bottom wall 1b of the tank body 1, and is formed in a rectangular shape as viewed from the plane so as to follow the left and right side surfaces and the front and rear side surfaces of the bottom wall 1b of the tank body 1. Has been. As clearly shown in FIG. 4, the canvas frame 11 is bent and formed in a cross-sectionally H-shape from a vertical wall portion 11 v and an upward inclined wall portion 11 s connected to the upper portion of the vertical wall portion 11 v. The lower edge of the vertical wall portion 11v is fixed to the tank body 1 on the inner surface of the bottom wall 1b, and the inclined wall portion 11s extends upwardly toward the side wall 1s of the tank body 1 so as to be free. A free lower end of a sloping plate 12 fixed to the inner surface of the side wall 1s of the tank body 1 and inclined downward toward the center of the tank body 1 is overlapped and welded to the upper end. The sloping plate 12 and the inclined wall portion 11 s are inclined downward toward the central portion of the tank body 1. The inclination angle of the sloping plate 12 is slightly larger than the repose angle of the granular material accommodated in the tank body 1 so that the granular material slides smoothly over the sloping plate 12 and the inclined wall portion 11s. Composed. As shown in FIG. 4, the inclined wall portion 11s of the canvas frame 11 has a lower half d formed lower than the upper half u via a step s, and the lower half d A support surface of the outer edge portion of the canvas 10 is formed.
[0018]
The canvas 10 is laid in a tensioned state at the bottom of the tank body 1 with a gap between the tank body 1 and the bottom wall 1 b of the tank body 1. The canvas 10 is inclined downward from the front and rear ends and the left and right ends of the tank body 1 toward the center thereof. As will be described in detail later, the outer peripheral edge portion of the canvas 10 has the canvas frame 11. The lower wall d of the inclined wall portion 11s is clamped and fixed by a presser member 14 to be described later, and the center portion of the canvas 10 is fixedly supported by a support frame 20 at the lowermost center of the bottom wall 1b of the tank body 1. The The canvas 10 is constituted by a porous sheet such as a cloth having a mesh smaller than the size of the granular material particles accommodated in the tank body 1.
[0019]
The air chamber Ca is defined by the canvas frame 11 and the canvas 10 at the bottom of the tank body 1, and the canvas 10, the canvas frame 11 and the sloping plate are above the air chamber Ca. 12 defines the granular material accommodation chamber Cp. Then, the pressurized air supplied to the air chamber Ca by the air compressor Ac is ejected through the mesh of the canvas 10 and into the granular material storage chamber Cp to fluidize the granular material.
[0020]
Next, with reference mainly to FIGS. 2-4, the attachment structure of the outer periphery part of the canvas 10 concerning this invention is demonstrated in detail.
[0021]
On the lower half portion d of the inclined wall portion 11s of each canvas frame 11, a presser member 14 is provided which clamps and fixes the outer peripheral edge portion of the canvas 10 in cooperation therewith. The presser member 14 is divided into a plurality of parts, and as shown in FIGS. 2 and 3, straight long left and right presser members 14L and 14R corresponding to the left and right inclined wall portions 11s of the canvas frame 11, and The curved front and rear pressing members 14F and 14B correspond to the front and rear inclined wall portions 11s. Each pressing member 14 is formed of a strip-shaped plate material, and as shown clearly in FIG. 4, a protrusion 14 a protruding downward along the longitudinal direction is integrally formed on the outer lower surface of the pressing member 14 and the inner side thereof. An uneven strip 14b having a sawtooth cross section is formed on the lower surface in the longitudinal direction. Further, a plurality of bolt holes 14c are provided in the central portion of the presser member 14 at intervals in the longitudinal direction. Each pressing member 14 is fastened on the lower half d of the inclined wall portion 11s of the canvas frame 11 by the fastening means 15. The fastening means 15 includes a plurality of bolts and nuts 16 and 17.
[0022]
The holding member 14 is overlapped on the lower half d of the inclined wall portion 11s of the canvas frame 11 with the protrusions 14a and the uneven stripes 14b on the lower side, and the lower half d and the bolt hole 14c of the holding member 14 are formed. Each presser member 14 is fixed on the lower half part d by screwing a nut 17 to a bolt 16 penetrating from below.
[0023]
As shown in FIG. 4, the outer peripheral edge of the canvas 10 laid on the bottom of the tank body 1, the lower half d of the inclined wall portion 11 s of the canvas frame 11, and the inner lower surface having the ridges 14 b of the pressing member 14. After that, if the nut 17 is screwed, the outer peripheral edge portion can be clamped and fixed between the pressing member 14 and the inclined wall portion 11s. At this time, since the serrated ridges 14b are formed on the inner lower surface of the presser member 14, the ridges 14b bite into the canvas 10 to strengthen the clamping force of the outer peripheral edge of the canvas 10. be able to. Thus, in a state where the outer peripheral edge of the canvas 10 is sandwiched and fixed between the pressing member 14 and the inclined wall portion 11s, the upper surface of the pressing member 14 is an extension surface of the upper surface of the sloping plate 12, as shown in FIG. The powder particles on the sloping plate 12 can be smoothly slid onto the canvas 10 via the pressing member 14.
[0024]
The canvas 10 is fixed to the lowermost part of the bottom wall 1 b of the tank body 1 at the center in the width direction, that is, at the bottom, in order to prevent the canvas 10 from swelling upward. As shown in FIGS. 4 and 5, a plurality of support bases 19 are fixed to the center portion in the width direction of the bottom wall 1 b of the tank main body 1 at intervals in the longitudinal direction of the tank main body 1. A support frame 20 extending along the longitudinal direction of the tank main body 1 is fixed on 19. A pressing member 21 is fixed to the upper surface of the support frame 20 via fixing means 22. The pressing member 21 is rod-shaped along the upper surface of the support frame 20 and has a mountain shape in cross section, and a plurality of bolt holes 21a are arranged on the bottom surface at intervals in the longitudinal direction. In addition, a through hole 21b communicating with the bolt holes 21a is opened on the top surface. The fixing means 22 includes a weld nut 23 welded to the upper lower surface of the support frame 20 and a bolt 24 screwed to the weld nut 23. After the pressing member 21 is placed on the upper surface of the support frame 20 with the center portion of the canvas 10 interposed therebetween, the bolt hole 21a and the bolt 24 penetrating the canvas 10 through the through hole 21b are screwed to the weld nut 23. Thus, as shown in FIG. 5, the central portion of the canvas 10 can be fixed on the support frame 20.
[0025]
Now, if the air compressor Ac is driven and pressurized air is pumped into the air chamber Ca, the pressurized air passes through the mesh of the canvas 10 and is ejected into the granular material containing chamber Cp. Fluidize the powder particles inside. At this time, the powder particles on the sloping plate 12 are slid from the plate 12 onto the canvas 10 through the inclined wall portion 11 s of the canvas frame 11 having the pressing member 14. Since the upper surface of the plate 12 and the inclined wall portion 11s provided with the pressing member 14 of the canvas frame 11 are formed on substantially the same surface, the sliding of the granular material from the slowing plate 12 to the canvas 10 is performed smoothly. The fluidization of the powder particles can be promoted, and the powder particles hardly remain on the canvas 10 and the canvas frame 11. Then, the fluidized granular material is discharged to the outside through the discharge pipe 4.
[0026]
By the way, in the example of this embodiment, the existing canvas frame 11 is formed by the vertical wall portion 11v and the inclined wall portion 11s in the granular tank made of the high-tensile steel plate, and the tank body 1 is formed on the inclined wall portion 11s. The plate-like pressing member 14 is fastened by the fastening means 15, and the outer peripheral portion of the canvas 10 is sandwiched and fixed between the inclined wall portion 11 s and the pressing member 14. In addition, since it is not necessary to provide an attachment material for preventing accumulation of granular materials or a contact material for fixing the canvas, and it is not necessary to form a space for attaching them, the overall height of the canvas frame 11 can be increased. The sloping that can be formed as low as possible as compared with that of Patent Document 1, and as a result, is connected to the inclined wall portion 11s of the canvas frame 11. Since the rate 12 can be shortened and the number of parts for attaching the canvas 10 can be reduced, the weight of the whole powder tank T can be reduced and the loading capacity of the powder can be greatly increased. Can do. In this embodiment, since it is not necessary to form attachment holes in the canvas 10, it is not necessary to align the attachment holes on the canvas 10 side and the canvas frame 11 side when assembling the canvas 10. Combined with this reduction, the assembly workability of the canvas 10 can be improved.
[0027]
Next, a second embodiment of the present invention will be described with reference to FIG.
[0028]
FIG. 6 is a cross-sectional view of the attachment portion of the outer peripheral portion of the canvas 10 to the canvas frame 11. In the figure, the same elements as those in the first embodiment are denoted by the same reference numerals.
[0029]
In the second embodiment, the fastening means 15 includes a weld nut 117 welded to the back surface of the lower half of the inclined wall portion 11s of the canvas frame 11, and a bolt 116 screwed to the weld nut 117. From above the presser member 14, a bolt 116 penetrating the presser member 14 and the lower half u of the canvas frame 11 is screwed to the weld nut 117. Thereby, the presser member 14 is fixed to the lower half u, and the outer peripheral portion of the canvas 10 is sandwiched and fixed therebetween.
[0030]
Thus, the second embodiment also has the same effects as the first embodiment.
[0031]
As mentioned above, although the Example of this invention was described, this invention is not limited to the Example, A various Example is possible within the scope of the present invention.
[0032]
For example, in the above embodiment, the case where the present invention is applied to a powder tank mounted on a powder carrier is described, but this can also be applied to a stationary powder tank or the like. In the example, the case where the present invention was implemented in a powder tank made of metal plate was described, but it is needless to say that this can also be implemented in a powder alloy tank made of a light alloy such as an aluminum alloy. The canvas 10 is not provided with an attachment hole between the inclined wall portion 11s of the canvas frame 11 and the pressing member 14, but the canvas 10 is not provided with an attachment hole. Bolts may be passed through the holes.
[0033]
【The invention's effect】
As described above, according to the first aspect of the present invention, in the powder tank made of metal plate, the existing canvas frame is formed by the vertical wall portion and the inclined wall portion, and the plate-like shape is formed on the inclined wall portion. Since the presser member is fastened by the fastening means and the outer peripheral part of the canvas can be fixed between the inclined wall part and the presser member, the canvas frame is deposited with powder particles as shown in Patent Document 1 above. There is no need to provide a mounting material for preventing, a contact material for fixing the canvas, or a mounting space for mounting them, and as a result, the number of parts can be reduced and the overall height of the canvas is the same as that of Patent Document 1. Compared to the above, the weight of the entire powder tank can be reduced, and the loading capacity of the powder can be greatly increased.
[0034]
Further, according to the invention described in claim 2, the same effect as that of the invention described in claim 1 can be obtained, and the canvas frame provided with the pressing member can be provided from the sloping plate for the powder in the powder tank. It can be smoothly slid on the canvas, and fluidization of the powder can be promoted. Moreover, when the powder is fluidized, the powder remains on the canvas frame and the canvas. There is almost nothing.
[Brief description of the drawings]
FIG. 1 is a side view of a powder carrier equipped with a powder tank equipped with a canvas mounting structure (first embodiment).
FIG. 2 is a partially broken perspective view of a powder tank (first embodiment).
3 is a cross-sectional plan view of the powder tank as viewed in the direction of arrow 3 in FIG. 2 (first embodiment).
FIG. 4 is an enlarged cross-sectional view of a part of the powder tank taken along line 4-4 of FIG. 3 (first embodiment).
5 is an enlarged partial sectional view taken along line 5-5 of FIG. 4 (first embodiment).
FIG. 6 is a cross-sectional view of a mounting portion of a canvas outer periphery to a canvas frame (second embodiment)
[Explanation of symbols]
1 Tank body 4 Discharge pipe 10 Canvas 11 Canvas frame 11s Inclined wall (canvas frame)
d Lower half (inclined wall)
u Upper half (inclined wall)
s Level difference (in the inclined wall)
12 Sloping plate 11v Vertical wall (canvas frame)
14 Holding member 15 Fastening means

Claims (2)

The canvas (10) is laid on the bottom of the tank body (1), and the granular material on the canvas (10) is fluidized by the pressurized air blown out from the mesh of the canvas (10), and the discharge pipe (4) In the air slide type granular material tank which was made to discharge more outside,
The canvas frame (11) provided at the bottom of the tank body (1) is integrally connected to the vertical wall (11v) fixed to the bottom surface of the tank body (1) and the upper part thereof, and extended to an upward slope. And an inclined wall portion (11s) integrally joined to a sloping plate (12) fixed to the tank body (1), and a plate-like pressing member (14) is formed on the inclined wall portion (11s). Fastened by fastening means (15), the outer peripheral edge of the canvas (10) is sandwiched and fixed between the pressing member (14) and the inclined wall (11s). Tank canvas mounting structure. The inclined wall portion (11s) of the canvas frame (11) has an upper half portion (u) and a lower half portion (d) lower than that connected to the upper half portion (u) via a step (s), The pressing member (14) is fixed to the lower half (d) by fastening means (15), and the upper surfaces of the pressing member (14) and the upper half (u) are substantially flush with each other. The canvas mounting structure for a granular material tank according to claim 1.

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