JP6978367B2 - Piping support structure in powder carrier - Google Patents

Description

In the present invention, a tank capable of accommodating powder or granular material is pivotally supported in a powder or granular material carrier, particularly the rear part of the vehicle body, and an actuator for tilting the tank rearward around the shaft support is interposed between the vehicle body and the tank. At the rear of the tank, a hatch that can open and close the discharge port provided at the rear is attached, and a discharge pipe that communicates with the discharge port is connected to the hatch, extending from the in-vehicle compressor and at least the downstream part is the vehicle body. The present invention relates to a compressor pipe fixed to the upstream end of the ejector pipe connected to the discharge pipe and the downstream end of the ejector pipe connected to the discharge pipe.

Such a powder or granular material carrier is already known as disclosed in Patent Document 1 below. In this case, high-pressure air is injected from a compressor to the discharge pipe side via an ejector pipe, and the powder is powdered by the high-pressure air. It makes it possible to promote the discharge of granules.

In addition, in this powder or granular material carrier, in order to make it easier for the powder or granular material to be discharged from the discharge pipe by gravity when the tank is tilted backward to discharge the powder or granular material, the installation site of the discharge pipe is located behind the tank. It is set at the lower end, and the hatch installation site is also set at the same position as the discharge pipe so that the powder or granular material collected in the lower rear end of the tank can be easily swept out through the discharge port opened by the hatch.

Special Publication No. 55-31012

In the powder and granule carrier of Patent Document 1, the entire ejector pipe is composed of a flexible hose, and the relative displacement between the tank (hence, the discharge pipe) and the vehicle body when the tank is tilted backward due to the bending deformation of this hose. Is made to be able to absorb. However, if the entire ejector pipe is made of a flexible hose, there is another problem that the hose becomes long and easily vibrates due to running vibration or the like.

Therefore, it is conceivable to suppress the vibration of the ejector pipe (hose) by fixing and supporting the middle portion of the ejector pipe at the other end of the ejector pipe stay having one end fixed to the tank.

However, in that case, when the hatch is opened and closed for maintenance inside the tank, the hatch (exhaust pipe) and the ejector piping stay with one end fixed to the tank are relatively displaced. The downstream piping portion of the ejector piping that straddles the stay for the ejector piping hinders the smooth opening and closing operation of the hatch, which may hinder the operability of the hatch. In order to avoid this problem, it is necessary to construct the downstream piping portion of the ejector piping with, for example, a material having a particularly high flexibility, or to set the piping length of the downstream piping portion to be longer. Therefore, the degree of freedom in design is reduced accordingly.

The present invention has been proposed in view of the above, and an object of the present invention is to provide a pipe support structure in a powder and granule carrier capable of solving a problem of a conventional structure with a simple structure.

In order to achieve the above object, in the present invention, a tank capable of accommodating powders and particles is pivotally supported at the rear part of the vehicle body, and an actuator for tilting the tank rearward around the shaft support is interposed between the vehicle body and the tank. A hatch that can open and close the discharge port provided in the rear portion is attached to the rear portion of the tank, and a discharge pipe that communicates with the discharge port is connected to the hatch, which extends from the in-vehicle compressor and is at least downstream. In the pipe support structure of a powder and granule carrier in which the upstream end of the ejector pipe is connected to the compressor pipe whose portion is fixed to the vehicle body and the downstream end of the ejector pipe is connected to the discharge pipe, the ejector pipe stay is attached to the hatch. At the same time, the predetermined intermediate portion of the ejector pipe is fixed to the other end of the ejector pipe stay, and the upstream pipe portion of the ejector pipe extending from the upstream end to the predetermined intermediate portion. The first feature is that at least a part of the piping portion is composed of a flexible hose portion.

Further, in the present invention, in addition to the first feature, in the ejector pipe, a specific pipe portion including at least a downstream pipe portion extending from the predetermined intermediate portion and the downstream end is composed of a rigid pipe portion. A part of the piping portion that is connected to the discharge pipe by a rigid pipe portion and is fixed to the ejector piping stay and is composed of a flexible hose portion, and the specific pipe that is composed of the rigid pipe portion. The second feature is that it is detachably connected to the portion.

Further, in the present invention, in addition to the first or second feature, the ejector piping stay is offset on the same side as the ejector pipe with respect to the axis when viewed in a direction perpendicular to the axis of the discharge pipe. This is the third feature.

Further, the powder / granule carrier according to the present invention is characterized by having a pipe support structure in the powder / granule carrier having any one of the first to third features.

According to the present invention, one end of the ejector piping stay is fixed to the hatch with the discharge pipe provided at the rear of the tank, and the predetermined intermediate portion of the ejector piping is fixed to the other end of the ejector piping stay. , Vibration of the ejector piping can be suppressed by the stay for the ejector piping. Further, when the hatch is opened for maintenance or the like, the stay for the ejector piping is integrally displaced with the hatch and the discharge pipe, and the displacement extends to the downstream piping portion (that is, the predetermined intermediate portion and the downstream end) of the ejector piping. Since the piping part) is also displaced in synchronization, the hatch is smooth even if the predetermined intermediate part of the ejector piping is fixed to the ejector piping stay, or if the downstream piping part of the ejector piping is made rigid or shortened. There is no possibility that the opening and closing operation will be hindered by the downstream piping portion, and the operability of the hatch is good. Moreover, for the downstream piping part of the ejector piping, it is possible to select the material regardless of the flexibility, and it is not necessary to set the piping length longer in consideration of the opening and closing of the hatch. The degree of freedom in design is increased.

In addition, even if the ejector piping stay and the compressor piping are displaced relative to each other when the hatch is opened or closed or the tank is tilted backward, the upstream piping portion (that is, the upstream end and the predetermined intermediate portion) of the ejector piping straddling both of them. Since at least a part of the piping portion) is composed of a flexible hose portion and easily bends, the relative displacement can be absorbed without difficulty.

Further, according to the second feature, in the ejector pipe, a specific pipe portion including at least a downstream pipe portion extending over a predetermined intermediate portion and a downstream end thereof is composed of a rigid pipe portion, and the ejector pipe discharges from the rigid pipe portion. It is connected to a pipe and fixed to an ejector pipe stay, and the part of the pipe part made of a flexible hose part and the specific pipe part made of a rigid pipe part are detachably connected to each other. If the hose part of the ejector pipe is separated from the rigid pipe part in advance when opening, the stay for the ejector pipe, the hatch, and the rigid pipe part of the ejector pipe are not interfered with the hose part of the ejector pipe without any difficulty. Since it can be displaced integrally, it is not necessary to remove the rigid pipe portion of the ejector pipe from the stay for the ejector pipe, and the workability is good.

Further, according to the third feature, the stay for the ejector piping is arranged offset on the same side as the ejector piping with respect to the axis when viewed in the direction perpendicular to the axis of the discharge pipe. Therefore, the stay for the ejector piping is of this. The distance between the fixing part (one end) to the hatch and the fixing part (the other end) to the ejector piping, that is, the length of the ejector piping stay can be set relatively short, which makes it possible to set the ejector piping stay. The support rigidity for the ejector pipe is increased, and the vibration of the ejector pipe can be suppressed more effectively.

An overall side view showing an embodiment of a powder and granule carrier according to the present invention. Enlarged side view showing the support structure of the ejector pipe and the air pipe of the powder and granule carrier (enlarged side view of the second arrow in FIG. 1). Enlarged side view of the 3 arrow view of FIG. 4-4 line sectional view of FIG. Partial rupture enlarged plan view showing the support structure of the ejector pipe and air pipe (partially ruptured enlarged plan view seen from the 5th arrow in FIG. 1) Enlarged rear view of partial fracture as seen from the 6th arrow in FIG. Cross-sectional view of the main part of the front part of the tank (cross-sectional view taken along line 7-7 in FIGS. 1 and 8) Section 8-8 of FIG. 7

Embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

First, in FIGS. 1 to 6, a tank T capable of accommodating powder or granular material (for example, cement, feed, fertilizer, etc.) is mounted on the vehicle body F of the powder or granular material carrier V.

The tank T consists of a hollow tank body Tm that is formed in a substantially cylindrical shape and extends in the front-rear direction, a plurality of manhole-forming cylinders Th that are firmly fixed to the upper part of the tank body Tm at intervals in the front-rear direction, and a tank body Tm. The circular ring-shaped discharge port forming body To provided at the lower part of the rear end and the discharge port 11 (see FIG. 6) formed on the inner peripheral surface of the discharge port forming body To and communicating with the tank body Tm can be opened and closed. A hatch H having a substantially conical taper shape and a discharge pipe D integrally coupled to the outer surface of the hatch H (for example, welding, screwing, etc.) and extending rearward are provided. The inside of the discharge pipe D and the discharge port 11 communicate with each other through the internal space of the hatch H.

The manhole forming cylinder Th forms a manhole for maintenance and introduction of powder or granular material into the tank T by the inner peripheral surface thereof, and this manhole is formed by a manhole cover 16 attached to the upper part of the tank body Tm. It can be opened and closed at any time.

On the side surface of the lower rear end of the tank body Tm, a U-shaped cross section extending outward from the tank T (more specifically, extending diagonally backward and bending in the middle and horizontally outward). The base end portion of the tail lamp stay St is fixed (for example, welded). A tail lamp 20 is attached to the tip of the tail lamp stay St, and a rod for connecting the intermediate portion of the tail lamp stay St and the tank body Tm to each other to increase the support rigidity of the tail lamp stay St. The upper and lower ends of the reinforcing member 21 made of a material are connected (for example, welded) to each other.

In addition to the tail lamp 20, various lamps (for example, a brake lamp, a winker lamp, a back lamp, etc.) can be attached to the tail lamp stay St.

The reinforcing member 21 is not limited to the bar material of the present embodiment, and is a strength member having various cross-sectional shapes having required rigidity strength (for example, a square pipe material, a round pipe material, an L-shaped or a U-shaped member). Angle material, etc.) can be used.

The discharge pipe D is formed of a rigid body together with the hatch H, and an on-off valve CV (for example, a butterfly valve) can be arbitrarily opened and closed from the outside by the attached operating lever 18 in the discharge pipe D as shown in FIG. It is provided as. The on-off valve CV is placed in a closed state during normal times, for example, when the powder or granular material carrier V is traveling to close the discharge pipe D, and is opened when the powder or granular material is discharged from the tank T. At the time of discharging the powder or granular material, the downstream end of the discharge pipe D is detachably connected to, for example, the upstream end of the discharge hose 41 (delivery hose), and the downstream end of the discharge hose 41 is, for example, the powder or granular material. It is connected to a storage container 42 (for example, a silo).

The rear end portion of the tank body Tm is pivotally supported by a pivot shaft 10 (see FIGS. 2 and 5) at the rear portion of the vehicle body F in front of and below the hatch H, and the shaft support portion, that is, around the pivot shaft 10 and rearward. It can be tilted, that is, swung to dump (see FIG. 1 chain line and white arrow).

Further, a telescopic lift cylinder A as an actuator is interposed between the front portion of the tank body Tm and the vehicle body F. Then, the tank body Tm can be tilted backward by extending the lift cylinder A. A hydraulic pressure supply system (not shown) including a hydraulic pump capable of supplying hydraulic pressure to the lift cylinder A at any time is mounted at an appropriate position on the vehicle body F.

Further, a compressor C, which is a supply source of pressurized air to be supplied into the tank body Tm and the discharge pipe D, is mounted at an appropriate position on the vehicle body F. At least a downstream portion (substantially the entire area in the embodiment) of the compressor pipe Lc extending rearward from the compressor C is fixed and supported on the vehicle body F.

The downstream end of the compressor pipe Lc is bifurcated, that is, branched into the first and second branch pipes 13 and 14, and the first branch pipe 13 is connected to the upstream end Leu of the ejector pipe Le described later. Further, the second branch pipe 14 is connected to the upstream end Lau of the air pipe La, which will be described later. The ejector pipe Le is provided with a first check valve 51 that allows only the flow of air from the compressor pipe Lc to the downstream side of the ejector pipe Le, and the air pipe La is provided with the air pipe La downstream from the compressor pipe Lc to the downstream side of the air pipe La. A second check valve 52 is provided that allows only the flow of air to the side. The first and second check valves 51 and 52 may be provided in the first and second branch pipes 13 and 14.

The hatch H is pivotally supported on the upper portion of the outlet forming body To via a pivot 9 and can swing open rearward and upward around the pivot 9 (see the chain line and the white arrow in FIG. 3). Further, between the outer peripheral portion of the hatch H and the outer peripheral portion of the discharge port forming body To, a plurality of clamping means 31 for clamping the hatch H to the discharging port forming body To and holding the hatch H in the closed position of the discharging port 11 in the circumferential direction. It is provided at intervals. As the clamping means 31, for example, a conventionally known one-touch type clamping means used for clamping a hatch of a powder or granule carrier is used.

It should be noted that the hatch H may be able to swing open to the left, right, rear and lower by disposing its shaft support, that is, the pivot 9, on the left, right, or lower part of the discharge port forming body To. Further, instead of pivotally supporting the hatch H to the tank body Tm (exhaust port forming body To) as in the embodiment, the hatch H is fastened with a plurality of bolts, and when the hatch H is opened, the tank body Tm (exhaust port forming body To) is fastened. It may be possible to completely remove it from To).

The ejector pipe Le is intended to assist and promote the discharge of powder or granular material from the discharge pipe D by injecting pressurized air into the discharge pipe D toward the downstream side, and the downstream end LED thereof. Opens diagonally downstream on the peripheral wall of the discharge pipe D.

Further, the ejector pipe Le of the present embodiment has a first pipe portion Le1 extending downstream from the upstream end Leu of the ejector pipe Le1 and a second pipe portion Le2 extending upstream from the downstream end Led of the ejector pipe Le. And an intermediate pipe portion Le3 that connects the first and second pipe portions Le1 and Le2 to each other.

The first and second pipe portions Le1 and Le2 are each composed of a rigid pipe portion having high rigidity, while the intermediate pipe portion Le3 is composed of a flexible hose portion. The upstream end of the intermediate pipe portion Le3 made of the hose portion is connected to the downstream end of the first pipe portion Le1 made of the rigid pipe portion, and the downstream end of the intermediate pipe portion Le3 and the second pipe made of the rigid pipe portion. Mutually connected to the upstream end of the portion Le2 is detachably connected at any time via the joint Je. As the joint Je, for example, a conventionally known coupling that can be locked and unlocked by a one-touch operation can be used.

As is clear from FIGS. 2 and 5, the first pipe portion Le1 extends substantially linearly in the front-rear direction, and the intermediate pipe portion Le3 extends in the horizontal plane so as to be curved toward the tank T side in the middle. Further, the second pipe portion Le2 is bent in a dogleg shape and extends so as to approach the central axis of the tank T, and the downstream end LED is connected in the middle of the discharge pipe D.

A base end portion of an ejector piping stay Se extending substantially along the discharge pipe D is fixed (for example, welded) to the outer surface of the hatch H. A predetermined intermediate portion Lex of the ejector piping Le (an intermediate portion of the second piping portion Le2 which is a rigid pipe portion near the discharge pipe D in the present embodiment) is fixed to the tip end portion of the ejector piping stay Se. As the fixing means, in the present embodiment, a U-shaped bolt 33 having an intermediate curved portion holding a predetermined intermediate portion Lex of the ejector pipe Le and being formed in a U-shape and the U-shaped bolt 33 are parallel to each other. A plurality of nuts 34, which are screwed to the pair of screw shaft portions 33a and 33a and fix each screw shaft portion 33a to the ejector piping stay Se, are used.

Here, the predetermined intermediate portion Lex may be any portion other than the upstream end Leu and the downstream end Red (that is, each connection portion with the compressor pipe Lc and the discharge pipe D) of the ejector pipe Le.

Further, the predetermined intermediate portion Lex fixed to the ejector pipe stay Se is displaced toward the discharge pipe D side from the central portion in the length direction of the ejector pipe Le and from the intermediate pipe portion Le3 formed of the hose portion. As a result, the upstream side pipe portion is relatively longer than the predetermined intermediate portion Lex of the ejector pipe Le, and is easily bent.

As is clear from FIG. 3, the ejector piping stay Se is viewed in a direction perpendicular to the axis Dc of the discharge pipe D (in other words, a predetermined direction parallel to the axis Dc of the discharge pipe D (vertical in this embodiment). Seen from the projection plane (direction)), for example, in the vehicle side view (FIG. 3), the axis line Dc is offset on the same side (lower side in the embodiment) as the ejector pipe Le.

Here, "offset arrangement of the ejector piping stay Se with respect to the axis Dc" means that at least half or more of the ejector piping stay Se is on the same side as the ejector piping Le with respect to the axis Dc. Say. Further, whether or not this "offset arrangement on the same side" may be seen other than the side view of the vehicle. For example, in a plan view, the ejector piping stay Se is on the same side as the ejector piping Le with respect to the axis Dc, that is, the figure. At 5, the offset is arranged on the left side of the vehicle. That is, when viewed from any direction perpendicular to the axis Dc of the discharge pipe D, more than half of the ejector piping stay Se is located on the same side as the ejector pipe Le with respect to the axis Dc.

According to this arrangement, the ejector piping stay Se can set the distance between the fixing portion with the hatch H and the fixing portion with the ejector piping Le, that is, the length of the ejector piping stay Se relatively short. Therefore, the support rigidity of the ejector piping stay Se with respect to the ejector piping Le is increased, and the vibration of the ejector piping Le can be suppressed more effectively.

In the present embodiment, the entire second piping portion Le2 including the downstream piping portion extending between the predetermined intermediate portion Lex and the downstream end LED of the ejector piping Le is configured by the rigid pipe portion, but the second piping portion Le2 At least a part of the hose portion may be composed of a flexible hose portion. Further, in the embodiment, the entire first piping portion Le1 is composed of a rigid pipe portion, but at least a part of the first piping portion Le1 may be composed of a flexible hose portion. Further, in the embodiment, the entire second piping portion Le2 is composed of a rigid pipe portion, but at least a part of the second piping portion Le2 may be composed of a flexible hose portion. Alternatively, the entire pipe Le1, Le3, Le2 of the ejector pipe Le may be composed of a flexible hose portion.

On the other hand, as shown in FIGS. 2 to 6, the air pipe La is fixed (for example, welded) to the tank body Tm so that the downstream end Lad opens to the lower part of the rear end of the tank body Tm.

At the lower part of the inner side wall of the tank body Tm, a flat first air passage 25 extending in the front-rear direction for guiding the pressurized air flowing from the air pipe La to the front part in the tank body Tm is defined. Further, a breathable canvas 27 is stretched adjacent to the side wall 26 of the first air passage 25 at the bottom of the tank body Tm, and between the canvas 27 and the bottom surface of the tank body Tm in the front-rear direction. A long, flat second air passage 28 is defined. The first and second air passages 25 and 28 communicate with each other through a plurality of communication holes 26h provided in the front portion of the side wall 26.

Thus, the pressurized air flowing from the compressor C through the compressor pipe Lc and the air pipe La to the rear part of the first air passage 25 in the tank T flows forward through the first air passage 25 and from the communication hole 26h. It flows into the front part of the second air passage 28, and from there, it is ejected upward into the tank body Tm through substantially the entire surface of the canvas 26. Therefore, when the stored powder or granular material in the tank T is discharged to the discharge pipe D side, the ejected air blown up through the canvas 26 pressurizes the inside of the tank T and the powder or granular material on the canvas 26 is moved backward. The slide flow is assisted and promoted, whereby the powder or granular material can be efficiently discharged to the discharge pipe D side.

Further, the air pipe La of the present embodiment has a first pipe portion La1 extending downstream from the upstream end Lau of the air pipe La1 and a second pipe portion La2 extending upstream from the downstream end Lad of the air pipe La. And an intermediate pipe portion La3 that connects the first and second pipe portions La1 and La2 to each other.

The first and second pipe portions La1 and La2 of the air pipe La are each composed of a rigid pipe portion having high rigidity, while the intermediate pipe portion La3 is composed of a flexible hose portion. The upstream end of the intermediate pipe portion La3 made of the hose portion is connected to the downstream end of the first pipe portion La1 made of the rigid pipe portion, and the downstream end of the intermediate pipe portion La3 and the second pipe made of the rigid pipe portion. Mutually connected to the upstream end of the portion La2 is detachably connected via a joint Ja. As for this joint Ja, for example, as in the case of the joint Je on the ejector pipe Le side, a conventionally known coupling that can be locked and unlocked by a one-touch operation can be used.

As is clear from FIGS. 2 and 5, the first piping portion La1 of the air piping La extends substantially linearly in the front-rear direction, and the intermediate piping portion La3 curves toward the tank T side in the middle of the substantially horizontal plane. The second piping portion La2 is bent in a dogleg shape in the middle and extends diagonally upward so as to approach the tank T, is connected to the lower part of the rear end of the tank body Tm, and is inside the tank body Tm ( More specifically, it is open to the first air passage 25).

At a position substantially directly above the predetermined intermediate portion Lax of the air pipe La (the intermediate portion of the second pipe portion La2 which is a rigid pipe portion in this embodiment), the intermediate portion of the above-mentioned tail lamp stay St is substantially in the vertical direction ( The upper end of the tank-side piping stay Sa extending downward) is fixed (for example, welded) and supported. A predetermined intermediate portion Lax of the air piping La is fixed and supported at the lower end of the tank-side piping stay Sa. As the fixing means, in the present embodiment, the same U-shaped bolt 33 and nut 34 used for fixing the predetermined intermediate portion Lex of the ejector piping Le to the ejector piping stay Se are used.

Here, the predetermined intermediate portion Lax may be any portion other than the upstream end Lau and the downstream end Lad of the air pipe La (that is, each connection portion with the compressor pipe Lc and the tank main body Tm).

Further, the predetermined intermediate portion Lax fixed to the tank-side piping stay Sa is displaced toward the tank T side from the central portion in the length direction of the air piping La and from the intermediate piping portion La3 including the hose portion. As a result, the pipe portion on the upstream side of the predetermined intermediate portion Lax of the air pipe La becomes relatively long and easily bends.

In the above embodiment, the entire second piping portion La2 including the downstream piping portion extending over the predetermined intermediate portion Lax and the downstream end Lad of the air piping La is configured by the rigid pipe portion, but the second piping portion La2. At least a part of the hose portion may be composed of a flexible hose portion. Further, in the embodiment, the entire first piping portion La1 is composed of a rigid pipe portion, but at least a part of the first piping portion La1 may be composed of a flexible hose portion. Further, in the embodiment, the entire second piping portion La2 is composed of a rigid pipe portion, but at least a part of the second piping portion La2 may be composed of a flexible hose portion. Alternatively, the entire piping La1, La3, La2 of the air piping La may be composed of a flexible hose portion.

Further, the hose portion constituting each of the intermediate piping portions Le3 and La3 of the ejector piping Le and the air piping La may be composed of only a flexible material, or a reinforcing material may be embedded in the flexible material. It may be composed of things. Therefore, when a hard flexible material is used for the hose portion or when the reinforcing material is embedded, appropriate rigidity is imparted to the flexible hose portion.

Moreover, the intermediate piping portions Le3 and La3 of the present embodiment are arranged so as to overlap with the pivot axis 10 which is the tilting fulcrum of the tank T when viewed from the side of the vehicle. As a result, the intermediate piping portions Le3 and La3 made of the flexible hose portion can be flexed and deformed without difficulty according to the relative displacement of the tank T with respect to the vehicle body F when the tank T is tilted backward.

Further, the first piping portions Le1 and La1 of the ejector piping Le and the air piping La, each of which is composed of a rigid pipe portion, are located at the tips of a pair of front and rear stays Sb and Sc whose base ends are fixed to the vehicle body F and extend outward. It is fixed in two places, front and back. As the fixing means, for example, the same U-shaped bolt used for fixing the predetermined intermediate portions Lex and Lax of the ejector piping Le and the air piping La to the ejector piping stay Se and the tank side piping stay Sa. 33 and nut 34 are used.

Next, the operation of the embodiment will be described. When the powder or granular material carrier V containing the powder or granular material in the tank T arrives at the destination, the downstream end of the discharge pipe D is connected to the powder or granular material storage container 42 (for example, a silo or the like) via the discharge hose 41. Will be done. Then, the on-off valve CV is opened and the compressor C is operated.

As a result, the pressurized air flowing from the compressor pipe Lc through the air pipe La to the rear part of the first air passage 25 in the tank T flows forward through the first air passage 25 and passes through the communication hole 26h in the front part. 2 Since the air flows into the air passage 27 and is further ejected upward into the tank body Tm through the canvas 26, the ejected air pressurizes the inside of the tank T and promotes the fluidization of the powder or granular material on the canvas 26. As a result, the sliding flow of the powder or granular material to the rear in the tank T is assisted and promoted, and the powder or granular material can be efficiently discharged to the discharge pipe D side.

Further, the pressurized air ejected from the compressor pipe Lc through the ejector pipe Le into the discharge pipe D can further assist and promote the discharge of the powder or granular material from the discharge pipe D.

Then, by tilting the tank T backward by the lift cylinder A as necessary, the backward flow of the powder or granular material in the tank T and the discharge of the powder or granular material from the discharge pipe D are further promoted.

Further, during the maintenance work inside the tank T, the manhole cover 16 is opened and the hatch H is further opened to open the manhole and the discharge port 11, so that the maintenance work inside the tank body Tm is not hindered through the open space. It can be carried out.

In particular, before opening the hatch H, the intermediate pipe portion Le3 consisting of the hose portion of the ejector pipe Le is separated from the second pipe portion Le2 composed of the rigid pipe portion at the joint Je (see the chain line in FIG. 3), and the discharge pipe D is used. And the discharge hose 41 are also separated. As a result, when opening and closing the hatch H, there is no concern that the intermediate piping portion Le3 and the discharge hose 41, which are formed by the hose portion of the ejector piping Le, interfere with the work.

By the way, in the hatch H with the discharge pipe D of the present embodiment, the base end portion of the stay Se for the ejector piping is fixed, and the predetermined intermediate portion Lex of the ejector piping Le is fixed to the tip end portion of the stay Se. Therefore, it is possible to suppress the vibration of the ejector pipe Le by the ejector pipe stay Se. Further, when the hatch H is opened, the stay Se for the ejector piping is integrally displaced with the hatch H (exhaust pipe D), and the displacement causes the downstream piping portion of the ejector piping Le (that is, the downstream end Red and the ejector piping). The piping part) extending to the stay Se) is also displaced in synchronization.

Thereby, even if the predetermined intermediate portion Lex of the ejector piping Le is fixed to the ejector piping stay Se, or the downstream piping portion of the ejector piping Le is made more rigid or shortened, the hatch H is smooth. There is no possibility that the opening / closing operation is hindered by the downstream piping portion of the ejector piping Le, and the operability of the hatch H is improved. Moreover, for the downstream piping portion of the ejector piping Le, the material can be selected regardless of the presence or absence of flexibility, and it is not necessary to set the piping length longer in consideration of the open / closeability of the hatch H. Therefore, the degree of freedom in design is increased accordingly.

Further, even if the ejector piping stay Se and the compressor piping Lc are displaced relative to each other when the hatch H is opened / closed or the tank T is tilted backward, the upstream piping portion (that is, upstream) of the ejector piping Le straddling both of them. Since at least a part of the piping portion (intermediate piping portion Le3 in the embodiment) of the piping portion extending between the end Leu and the predetermined intermediate portion Lex is composed of a flexible hose portion and easily bends, relative displacement is caused. It can be absorbed without difficulty.

Further, in the ejector pipe Le, a specific pipe portion (second pipe portion Le2 in the present embodiment) including at least a downstream pipe portion extending from the downstream end Red of the ejector pipe Le and at least a predetermined intermediate portion Lex is composed of a rigid pipe portion. , It is connected to the discharge pipe D by its rigid pipe portion and fixed to the ejector piping stay Se. Moreover, the partial piping portion (intermediate piping portion Le3 in the embodiment) composed of a flexible hose portion and the specific piping portion (second piping portion Le2 in the present embodiment) composed of a rigid pipe portion. Is detachably connected via a joint Je so that it can be detached at any time.

Therefore, when opening the hatch H, for example, if the intermediate pipe portion Le3 (hose portion) of the ejector pipe Le is separated from the second pipe portion Le2 (rigid pipe portion) in advance, the ejector pipe stay Se, the hatch H and the second 2 The piping portion Le2 (rigid pipe portion) can be displaced integrally without any interference with the intermediate piping portion Le3 (hose portion), and the second piping portion Le2 (rigid pipe portion) can be displaced from the ejector piping stay Se without any difficulty. There is no need to remove the part).

Further, in the present embodiment, the base end portion of the tail lamp stay St extending in the direction away from the tank T is fixed and supported in a cantilever shape at the lower rear end of the tank T, but is closer to the tip of the tail lamp stay St. Since the intermediate portion of the tank T and the tank T are integrally connected via the reinforcing member 21, the support rigidity for the tail lamp stay St is effectively enhanced by the reinforcing member 21.

Then, the base end portion of the tank-side piping stay Sa is fixed and supported in the middle portion of the tail lamp stay St, and the predetermined intermediate portion Lax of the air piping La is fixed to the tip end portion of the tank-side piping stay Sa. Be supported. Since the tank-side piping stay Sa is fixed to the tank T via the tail lamp stay St extending in the direction away from the tank T in this way, the tank-side piping stay Sa itself can be shortened accordingly, and the tank side can be shortened. Vibration of the piping stay Sa (hence, the air piping La supported by the stay Sa) can be effectively suppressed.

Moreover, since the reinforcing member 21 for the tail lamp stay St is also used as a reinforcing means for the tank side piping stay Sa, the structure can be simplified and the cost can be reduced accordingly.

Further, even if the tank-side piping stay Sa and the vehicle body-side compressor piping Lc that are displaced in synchronization with the tank T are displaced relative to each other when the tank T is tilted backward for discharging powder or granules, there is a relative displacement between the two. Of the upstream piping portion of the straddling air piping La (that is, the piping portion extending between the upstream end Lau and the predetermined intermediate portion Lax), at least a part of the piping portion (specifically, the intermediate piping portion La3) is flexible. Since it is composed of the hose part of the above and is easily bent, its relative displacement can be absorbed without difficulty.

Moreover, the tank-side piping stay Sa of the present embodiment is formed so as to extend in the vertical direction from the tail lamp stay St. As a result, among the running vibrations of the vehicle, the vertical vibration, which becomes particularly large due to the unevenness of the road surface, acts on the tank side piping stay Sa in the longitudinal direction (vertical direction), and the tank side due to the vibration. Bending deformation of the piping stay Sa is effectively suppressed. As a result, the vibration of the free end (upper and lower ends) of the tank-side piping stay Sa can be effectively suppressed, so that the vibration of the air piping La can be suppressed more effectively.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and various design changes can be made without departing from the gist thereof.

For example, in the above-described embodiment, each stay Se, Sa, St, Sb, Sc is made of an angle material having an L-shaped or U-shaped cross section, but each stay Se, Sa, St, Sb, The form of Sc is not limited to the above-described embodiment, and members having various cross-sectional shapes (for example, square pipe shape, round pipe shape, rod shape, etc.) having required rigidity and strength can be used.

Further, in the above embodiment, U-shaped bolts 33 and nuts 34 are used as fixing means for fixing the predetermined intermediate portions Lex and Lax of the ejector piping Le and the air piping La to the ejector piping stay Se and the tank side piping stay Sa. Although the above is exemplified, the fixing means is not limited to the embodiment, and various other fixing means can be used. For example, the holding member for holding the predetermined intermediate portions Lex and Lax of the ejector pipe Le and the air pipe La may be bolted or welded to the ejector pipe stay Se and the tank side pipe stay Sa.

Further, in the above embodiment, the predetermined intermediate portion Lex of the ejector pipe Le, which is the fixing target portion by the ejector piping stay Se, is shown to be the rigid pipe portion of the ejector pipe Le, but the predetermined intermediate portion Lex is It may be a flexible hose portion of the ejector pipe Le.

Further, in the above-described embodiment, in the ejector pipe Le, the connection portion with the branch pipe 13 (that is, the upstream end portion of the first pipe portion Le1) is set as the upstream end portion Leu, but the upstream end of the intermediate pipe portion Le3 including the hose portion. The portion may be the upstream end portion Leu of the ejector pipe Le. In this case, the first pipe portion Le1 made of the rigid pipe portion of the embodiment is also used as the compressor pipe Lc, that is, becomes a downstream portion of the compressor pipe Lc and is fixed to the vehicle body F via the stays Sb and Sc.

Further, in the above embodiment, the compressor pipe Lc is connected to the ejector pipe Le and the air pipe La via the branch pipes 13 and 14, but in the present invention, the air pipe La may be omitted. Branch pipes 13 and 14 are also unnecessary. In this case, the compressor pipe Lc having no branch pipes 13 and 14 is set to the upstream side from the hose portion (intermediate pipe portion Le3 in the embodiment) of the ejector pipe Le, that is, to the vehicle body F on the upstream side from the hose portion. The fixed rigid pipe portion (first piping portion Le1 in the embodiment) is a downstream portion of the compressor pipe Lc.

A: Lift cylinder (actuator)
C ... Compressor D ... Discharge pipe Dc ... Axis F ... Body H ... Hatch Lc ... Compressor piping Le ... Ejector piping Led・ ・ ・ Downstream end of ejector pipe Leu ・ ・ ・ Upstream end of ejector pipe Lex ・ ・ ・ Predetermined intermediate part of ejector pipe Le2 ・ ・ ・ First pipe part (specific pipe part composed of rigid pipe part)
Le3 ... Intermediate piping part (a part of the piping part composed of a flexible hose part)
Se ... Ejector piping stay T ... Tank 10 ... Axis (shaft branch)
11 ... Discharge port

Claims (4)

A tank (T) capable of accommodating powder or granular material is pivotally supported at the rear portion of the vehicle body (F), and an actuator (A) for tilting the tank (T) backward around the shaft support portion (10) is attached to the vehicle body (F). A hatch (H) that can open and close the discharge port (11) provided at the rear portion of the tank (T) is attached to the rear portion of the tank (T). An ejector pipe (Le) is connected to a compressor pipe (Lc) that connects a discharge pipe (D) that communicates with the discharge port (11), extends from an in-vehicle compressor (C), and has at least a downstream portion fixed to a vehicle body (F). ) Is connected, and the downstream end (Led) of the ejector pipe (Le) is connected to the discharge pipe (D) in the pipe support structure of the powder or granular material carrier.
One end of the ejector piping stay (Se) is fixed to the hatch (H), and a predetermined intermediate portion (Lex) of the ejector piping (Le) is fixed to the other end of the ejector piping stay (Se). ,
At least a part of the upstream piping portion (Le3) of the ejector piping (Le) extending from the upstream end (Leu) to the predetermined intermediate portion (Lex) is composed of a flexible hose portion. The piping support structure in the powder and granular material carrier, which is characterized by the above. In the ejector pipe (Le), a specific pipe portion (Le2) including at least a downstream pipe portion extending over the predetermined intermediate portion (Lex) and the downstream end (Led) is composed of a rigid pipe portion, and the rigidity thereof is formed. It is connected to the discharge pipe (D) at the pipe portion and fixed to the ejector piping stay (Se).
The claim is characterized in that the partial piping portion (Le3) composed of a flexible hose portion and the specific piping portion (Le2) composed of a rigid pipe portion are detachably connected to each other. The pipe support structure in the powder or granular material carrier according to Item 1. The ejector piping stay (Se) is offset from the ejector pipe (Le) with respect to the axis (Dc) when viewed in a direction perpendicular to the axis (Dc) of the discharge pipe (D). The pipe support structure in the powder or granular material carrier according to claim 1 or 2, characterized in that. A powder or granular material carrier according to any one of claims 1 to 3, further comprising a pipe support structure for the powder or granular material carrier.

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