JP6929253B2 - Liquid tank device - Google Patents

Description

The present invention relates to a liquid tank device.

Conventionally, a backpack-type power sprayer that sprays a chemical solution on an agricultural product is provided with a chemical solution tank (liquid tank) in which a chemical solution such as a pesticide to be sprayed is stored, and is used in a state of being carried by an operator. Such backpack-type power sprayers often use water that dissolves pesticides directly from agricultural canals, etc., and a strainer for removing and filtering foreign substances can be attached to and detached from the injection port of the chemical solution tank. It is attached to.

The strainer described in Patent Document 1 below includes a substantially cylindrical tubular body that is detachably attached to an injection port of a chemical solution tank, and the bottom of the tubular body is formed by a plurality of bone members extending radially from the center. It is partitioned in the circumferential direction, and meshes as filtration portions are provided in each of the plurality of partitioned fan-shaped openings. The bottom of the tubular body is provided with a flat plate-shaped resistance portion (wave-eliminating blade) that extends radially and downward from the center of the bottom and is in contact with the liquid stored in the chemical solution tank. This resistance portion gives resistance to the flow of the liquid, suppresses the undulation of the liquid and the movement of the center of gravity, and reduces the burden on the operator who is performing the work.

Japanese Unexamined Patent Publication No. 2006-197932

However, the one described in Patent Document 1 has the following problems. That is, since the mesh constituting the filtration portion is generally insert-molded into a tubular body, the work of inserting the mesh is required, and the work of the manufacturing process is complicated. In addition, it was necessary to manage separate meshes separately. Further, the separate mesh has a problem that the crimping to the side surface of the tubular body is weak and it is difficult to insert. Further, since the mesh is provided in the fan-shaped opening partitioned by the bone member at the bottom, it is difficult to secure a large water supply area (mesh opening area). Further, in order to prevent the rebound of water supply to the chemical solution tank from coming out of the chemical solution tank, it is advantageous that the water supply collision surface (the filtration part (mesh) at the bottom of the tubular body) is located lower. Since the bottom of the tubular body is further provided with a resistance portion extending downward, the water supply collision surface must be above the resistance portion, the water supply collision surface cannot be lowered, and the water supply rebounds. Was in danger of going out of the chemical tank.

The present invention has been made to solve such a problem, and it is possible to eliminate the need for a separate mesh, secure a large water supply area as compared with the conventional case, and in addition, supply water by a water supply collision surface. It is an object of the present invention to provide a liquid tank device capable of preventing the bounce of the liquid from coming out of the liquid tank.

The liquid tank device according to the present invention includes a liquid tank (2) for storing a liquid and a tubular body (10) attached to an injection port (8) above the liquid tank (2) and provided with a filtration portion. The liquid tank device is characterized in that the side portion (13) and the bottom portion (14) of the tubular body (10) are provided with a large number of through holes (18, 24) constituting the filtration portion.

According to such a liquid tank device, since a large number of through holes (18, 24) which are filtration portions are provided on the side portion (13) and the bottom portion (14) of the tubular body (10), they are separate bodies. No mesh is required, and mesh insertion work and mesh management are not required. Further, since the side portion (13) has a large number of through holes (18) as described above, a large water supply area can be secured as compared with the conventional configuration in which the mesh is provided only on the bottom portion. Further, since the side portion (13) has a large number of through holes (18) as described above, a desired resistance can be given to the liquid in contact in the liquid tank (2), and the conventional resistance portion can be provided. Is no longer required, and the tubular body (10) can be extended downward. As a result, a larger water supply area can be secured. Further, since the tubular body (10) can be extended downward in this way, the bottom portion (14) having a large number of through holes (24) and serving as a water supply collision surface is located lower than before. , It is possible to prevent the rebound of water supply from coming out of the liquid tank (2).

Here, if the height (H) of the side portion (13) and the bottom portion (14) is larger than the diameter (D1) of the injection port (8) of the liquid tank (2), the bottom portion (14) is liquid. It can be located at a deep position in the tank (2), a large water supply area can be secured on the side portion (13), and the rebound of the water supply can be prevented from going out of the liquid tank (2).

Further, even if the height (H) of the side portion (13) and the bottom portion (14) is larger than 1/2 of the depth (D2) of the liquid tank (2), the bottom portion (14) is the liquid tank (2). It can be located at a deep position inside, a large water supply area can be secured on the side portion (13), and the rebound of the water supply can be prevented from coming out of the liquid tank (2).

Here, as a configuration that preferably exerts the above action, specifically, the side portion (13) is formed in a cylindrical shape or a truncated cone shape that expands in diameter toward the upper portion, and the side portion (13) is formed. A large number of horizontal grooves (16) extending in the circumferential direction are arranged side by side on the outer peripheral surface of the side portion (13), and vertical grooves (17) extending in the vertical direction are provided on the inner peripheral surface of the side portion (13). , A large number are arranged side by side along the circumferential direction, and the portion where the horizontal groove (16) and the vertical groove (17) are in contact with each other forms a through hole (18) in the side portion (13), and is formed on the upper surface of the bottom portion (14). A large number of upper surface grooves (22) are arranged side by side in a plan view, and a large number of lower surface grooves (23) intersecting a large number of upper surface grooves (22) in a bottom view are arranged side by side on the lower surface of the bottom portion (14). Examples thereof include a configuration in which a portion in contact between the upper surface groove (22) and the lower surface groove (23) forms a through hole (24) in the bottom portion (14).

By adopting such a configuration, the following manufacturing method can be adopted. That is, it is formed in a cylindrical shape or a truncated cone shape whose diameter increases toward the upper part, has an outer peripheral surface for forming an inner peripheral surface of the tubular body (10), and has a side portion (on the outer peripheral surface). In order to provide a large number of first convex portions extending in the vertical direction (vertical direction) along the circumferential direction corresponding to the vertical groove (17) of 13) and to form the upper surface of the bottom portion (14) of the cylindrical body (10). A core having a tip surface thereof, the tip surface of which is provided with a large number of second convex portions corresponding to upper surface grooves (22) on the upper surface of the bottom portion (14), and a bottom portion (14) of the cylindrical body (10). It has an upper surface for forming a lower surface, and on the upper surface, a large number of third convex portions corresponding to a lower surface groove (23) on the lower surface of the bottom portion (14) and intersecting a large number of second convex portions on the tip surface of the core. A mold having a cavity provided with a cavity and a circular hole or a truncated cone-shaped hole whose diameter increases toward the upper part in the center is divided in half along the axis, and is cylindrical in a state of being butted against each other. It has an inner peripheral surface for forming the outer peripheral surface of the body (10), and a fourth convex portion extending in the circumferential direction corresponding to the lateral groove (16) of the side portion (13) is vertically formed on the inner peripheral surface. Prepare a pair of split molds, which are provided in large numbers along the vertical direction).

Then, the cavity and the core are arranged with a predetermined gap, and a pair of split molds are arranged with a predetermined gap between the butt and the core so as to surround the core. In this state, the vertical direction of the outer peripheral surface of the core The first convex portion extending to the surface and the fourth convex portion extending in the circumferential direction of the inner peripheral surface of the split mold are brought into contact with each other, and the second convex portion on the tip surface of the core and the third convex portion on the upper surface of the cavity are brought into contact with each other. With the parts in contact, the molten resin is poured into the gap and the mold is released.

Then, a through hole (18) of the side portion (13) is formed in the portion where the first convex portion of the outer peripheral surface of the core and the fourth convex portion of the inner peripheral surface of the split mold are in contact with each other, and the tip surface of the core is formed. A through hole (24) of the bottom portion (14) is formed in a portion where the second convex portion and the third convex portion on the upper surface of the cavity are in contact with each other, and a large number of through holes (14) are formed in the side portion (13) and the bottom portion (14). The tubular body (10) having 18, 24) is obtained.

That is, according to the above configuration, injection molding with a core, a cavity, and a pair of split dies using a quadruple mold is possible, and the tubular body (10) can be easily molded. When a truncated cone-shaped core whose diameter increases toward the upper part is used, the core can be easily pulled out because it has a draft.

Here, various configurations can be adopted as the upper surface groove (22) and the lower surface groove (23), but the upper surface groove (22) is the vertical portion of the bottom portion (14) extending along the vertical direction which is one direction in a plan view. A large number of grooves (22) are arranged side by side in a direction orthogonal to the vertical groove (22) of the bottom portion (14), and the lower surface groove (23) is a vertical groove (22) of the bottom portion (14) in a bottom view. ), A large number of lateral grooves (23) of the bottom portion (14) extending in a direction orthogonal to the lateral groove (23) of the bottom portion (14) are arranged side by side in a direction orthogonal to the lateral groove (23) of the bottom portion (14). ) And the vertical groove (22) of the bottom portion (14) preferably form a through hole (24) of the bottom portion (14). When such a configuration is adopted, since the linear grooves (22, 23) intersect at right angles, a large number of fine substantially rectangular through holes (24) can be arranged side by side on the bottom portion (14).

As described above, according to the present invention, it is possible to eliminate the need for a separate mesh, secure a large water supply area as compared with the conventional case, and prevent the rebound of water supply due to the water supply collision surface from coming out of the liquid tank. A capable liquid tank device can be provided.

It is a side view which shows the backpack type power sprayer to which the liquid tank apparatus which concerns on embodiment of this invention is applied. It is a perspective view which looked at the tubular body used for the backpack type power sprayer of FIG. 1 from above. It is an upper enlarged view of the side part of the tubular body shown in FIG. It is a side view of the tubular body shown in FIG. It is a top view of the tubular body shown in FIG. It is a bottom view of the tubular body shown in FIG.

Hereinafter, preferred embodiments of the liquid tank device according to the present invention will be described with reference to the accompanying drawings. Here, a case where the liquid tank device is applied to a backpack type power sprayer for spraying a chemical solution will be described as being particularly suitable. FIG. 1 is a side view showing a backpack-type power sprayer to which the liquid tank device according to the embodiment of the present invention is applied, FIG. 2 is a perspective view of a tubular body viewed from above, and FIG. 3 is a tubular body. An enlarged view of the upper part of the side portion, FIG. 4 is a side view of the tubular body, FIG. 5 is a plan view of the tubular body, and FIG. 6 is a bottom view of the tubular body.

As shown in FIG. 1, the backpack-type power sprayer 1 has a liquid tank 2 that stores liquids such as pesticides and serves as a backpack carried by an operator, and a spray nozzle that sucks the liquid in the liquid tank 2 (FIG. 1). A pump 3 for pumping to (not shown), an internal combustion engine 4 as a prime mover for driving the pump 3, and a fuel tank 5 for storing the fuel of the internal combustion engine 4 are provided. The pump 3, the internal combustion engine 4, and the fuel tank 5 are installed on the backpack frame 6, and the liquid tank 2 is arranged on the backpack frame 6. The backpack-type power sprayer 1 includes a pair of left and right backpack bands 7 and 7 for an operator to carry the liquid tank 2 and the backpack frame 6 on his back. In FIG. 1, the backpack bands 7 and 7 are drawn so as to overlap in the vertical direction of the paper surface, the upper end thereof is locked to the liquid tank 2, and the lower end thereof is locked to the backpack frame 6.

The liquid tank 2 is made of a translucent synthetic resin, and the amount of liquid inside can be visually recognized from the outside. An injection port 8 for injecting a liquid into the liquid tank 2 is formed in the upper part of the liquid tank 2. The injection port 8 is a substantially cylindrical body protruding from the liquid tank 2, and a male screw is formed on the outer peripheral surface thereof, and is formed on the inner peripheral surface of the tank lid (cap) 9 with respect to the male screw. By screwing the female screw, the tank lid (cap) 9 is detachably attached to the liquid tank 2.

A liquid tank device is attached to the backpack type power sprayer 1. This liquid tank device includes the liquid tank 2 and a tubular body 10 that is detachably mounted under the tank lid 9 of the liquid tank 2 and functions as a strainer. In FIG. 1, only the side portion 13 and the bottom portion 14 of the tubular body 10, which will be described later, are clearly shown in the liquid tank 2.

Here, a step portion (not shown) protruding inward in the radial direction is provided at a position below the injection port 8 of the liquid tank 2, and when the tubular body 10 is dropped inside the injection port 8. A step portion 11 (see FIG. 4) of the upper portion 12 of the tubular body 10 is locked to this step portion, and by opening and closing the tank lid 9 shown in FIG. 1, the tubular body 10 becomes a liquid tank 2. It is designed to be removable.

The tubular body 10 has a substantially bottomed cylindrical shape, and has an upper portion 12, a side portion 13, and a bottom portion 14 in this order from top to bottom, as shown in FIGS. 2 and 4. The upper portion 12 has a cylindrical shape whose diameter is slightly enlarged through the step portion 11 as compared with the side portion 13, and the liquid is supplied from the open end of the upper portion 12.

The side portion 13 and the bottom portion 14 of the tubular body 10 form a filtration portion and exert a strainer function. The side portion 13 is continuously provided at the lower end of the upper portion 12 and exhibits a long length in the vertical direction, and here, the side portion 13 is formed in a truncated cone shape in which the diameter increases toward the upper portion (the diameter decreases toward the lower portion). .. The shape of the truncated cone is for easily pulling out the core for forming the tubular body 10 during injection molding (details will be described later).

As shown in FIGS. 2 to 6, the side portion 13 has vertical ribs 15 extending in the vertical direction and connecting the upper portion 12 and the bottom portion 14 at four equidistant positions along the circumferential direction. As shown in FIGS. 3, 4 and 6, a lateral groove 16 extending along the circumferential direction is formed on the outer peripheral surface between the longitudinal ribs 15 and 15 in the circumferential direction in the side portion 13, and the lateral groove 16 is formed. Many are arranged side by side along the vertical direction (see FIG. 3).

Further, as shown in FIGS. 2, 3 and 5, a vertical groove 17 extending in the vertical direction is formed on the inner peripheral surface between the vertical ribs 15 and 15 in the circumferential direction on the side portion 13. A large number of vertical grooves 17 are arranged side by side along the circumferential direction (see FIG. 3).

Then, as shown in an enlarged manner in FIG. 3, a through hole 18 of the side portion 13 is formed at a portion where the bottom surface of the horizontal groove 16 and the bottom surface of the vertical groove 17 are in contact with each other. That is, a large number of through holes 18 are opened in the side portion 13 having a truncated cone shape, except for the four vertical ribs 15. The through hole 18 has a fine substantially rectangular shape, and has a function of removing foreign matter and filtering like a mesh.

As shown in FIGS. 5 and 6, the bottom portion 14 has a central portion 19 having a small diameter disk shape located at the center, an annular outer peripheral portion 20, and a central portion 19 and an outer peripheral portion 20 extending radially from the central portion 19. It is provided with a radial rib 21 for connecting the above. The radial ribs 21 extend from the center along the circumferential direction in an eight-equal arrangement, and four of them are arranged so as to be connected to the lower ends of the four-equal vertical ribs 15 on the side portion 13.

As shown in FIG. 5, an upper surface groove 22 extending in one direction is formed on the upper surface of the bottom portion 14 at a position excluding the central portion 19, the outer peripheral portion 20, and the radial rib 21 in the bottom portion 14. Has been done. Here, the vertical direction of FIG. 5 is the vertical direction, the direction orthogonal to the vertical direction is the horizontal direction, and the upper surface groove 22 is the vertical groove 22 of the bottom portion 14 in which one direction is the vertical direction. A large number of vertical grooves 22 are arranged side by side in the horizontal direction orthogonal to the vertical direction.

Further, as shown in FIG. 6, a lower surface groove 23 is formed on the lower surface of the bottom portion 14 at a position excluding the central portion 19, the outer peripheral portion 20, and the radial rib 21 on the bottom portion 14. The lower surface groove 23 is a horizontal groove 23 extending in the horizontal direction orthogonal to the vertical groove 22 of the bottom portion 14, and a large number of horizontal grooves 23 of the bottom portion 14 are arranged side by side in the vertical direction.

Then, as in the case of the side portion 13, the bottom portion 14 is passed through the portion where the bottom surface of the lateral groove 23 on the lower surface of the bottom portion 14 shown in FIG. 6 and the bottom surface of the vertical groove 22 on the upper surface of the bottom portion 14 shown in FIG. 5 are in contact with each other. The holes 24 are formed. That is, a large number of through holes 24 are opened in the disc-shaped bottom portion 14 at positions other than the central portion 19, the outer peripheral portion 20, and the radial ribs 21. The through hole 24 has a fine substantially rectangular shape like the through hole 18 of the side portion 13, and has a function of removing foreign matter and filtering like a mesh.

When such a tubular body 10 is injection-molded (injection-molded), a core and a cavity that move in the vertical direction and a pair of split molds (slide cores) that move in the horizontal direction are prepared as molds.

The core is formed in a truncated cone shape whose diameter decreases toward the bottom, and has an outer peripheral surface for forming an inner peripheral surface of the tubular body 10, and the outer peripheral surface is formed in a vertical groove 17 of a side portion 13. Correspondingly, it has a first convex portion extending in the vertical direction (vertical direction). Further, the core has a tip surface for forming the upper surface of the bottom portion 14 of the tubular body 10, and a second convex portion extending in the vertical direction corresponding to the vertical groove 22 on the upper surface of the bottom portion 14 is formed on the tip surface thereof. I have.

The cavity is formed in a disk shape having an upper surface for forming the lower surface of the bottom portion 14 of the tubular body 10, and the upper surface thereof has a third convex portion extending in the lateral direction corresponding to the lateral groove 23 on the lower surface of the bottom portion 14. It has.

The pair of split molds is a mold having a truncated cone-shaped hole in the center that shrinks toward the bottom, and is split in half along the axis. The outer peripheral surface of the tubular body 10 is abutted against each other. The inner peripheral surface is provided with a fourth convex portion corresponding to the lateral groove 16 of the side portion 13 and extending in the circumferential direction. This split mold is divided into left and right in the drawing at positions (lines indicated by alternate long and short dash lines in FIG. 4) X corresponding to a pair of opposing vertical ribs 15 and 15 on the side portions 13 of the tubular body 10.

Then, the cavity and the core are arranged with a predetermined gap, and a pair of split molds are arranged so as to surround the core with a predetermined gap between the butt and the core to close the mold.

In this state, the first convex portion extending in the vertical direction of the outer peripheral surface of the core and the fourth convex portion extending in the circumferential direction of the inner peripheral surface of the split mold are in contact with each other and in the vertical direction of the tip surface of the core. The extending second convex portion and the third convex portion extending in the lateral direction on the upper surface of the cavity are in contact with each other.

Then, the molten resin is poured into the gap. At this time, the molten resin does not flow to the portion where the convex portions are in contact with each other.

After the molten resin has cooled, the core is pulled out upward as indicated by arrow A in FIG. 4, the cavity is moved downward as indicated by arrow B, and the split dies are slid laterally separated from each other as indicated by arrows C and D. By performing the mold opening, injection molding with the core, the cavity, and the pair of split molds is completed, and the tubular body 10 shown in FIGS. 1, 2 and 4 is obtained (FIG. 3, FIG. 3). See also FIGS. 5 and 6).

Here, since the molten resin does not flow to the portion where the convex portions of the mold are in contact with each other, a through hole is formed. That is, through holes 18 of the side portion 13 are formed in the portions where the vertical grooves 17 on the inner peripheral surface of the side portion 13 and the lateral grooves 16 on the outer peripheral surface are in contact with each other, and the vertical grooves 22 on the upper surface and the lower surface of the bottom portion 14 are formed. A through hole 24 of the bottom portion 14 is formed at a portion in contact with the lateral groove 23.

In the tubular body 10 thus obtained, as shown in FIG. 1, the height H of the side portion 13 and the bottom portion 14 in the state of being mounted on the liquid tank 2 is the note of the liquid tank 2. It is larger than the diameter D1 of the entrance 8.

Further, the height H of the side portion 13 and the bottom portion 14 is larger than 1/2 of the depth D2 of the liquid tank 2.

According to the liquid tank device configured as described above, that is, the liquid tank device including the liquid tank 2 and the tubular body 10 including the filtering portion, the filtering portions are formed on the side portion 13 and the bottom portion 14 of the tubular body 10. Since the configuration is provided with a large number of through holes 18 and 24, a separate mesh is not required, and mesh insertion work and mesh management are not required. Further, since the side portion 13 has a large number of through holes 18 as described above, a large water supply area can be secured as compared with the conventional configuration in which the mesh is provided only on the bottom portion. Further, since the side portion 13 has a large number of through holes 18 as described above, a desired resistance can be given to the liquid in contact in the liquid tank 2, the conventional resistance portion becomes unnecessary, and the shape is tubular. The body 10 can be extended downward. As a result, a larger water supply area can be secured. Further, since the tubular body 10 can be extended downward in this way, the bottom portion 14 having a large number of through holes 24 and serving as a water supply collision surface is located lower than before, and the rebound of water supply is liquid. It is possible to prevent the tank 2 from going out.

Further, since the height H of the side portion 13 and the bottom portion 14 is larger than the diameter D1 of the injection port 8 of the liquid tank 2, the bottom portion 14 can be positioned at a deep position in the liquid tank 2, and the side portion 13 is large. The water supply area can be secured, and the rebound of the water supply can be prevented from coming out of the liquid tank 2.

Further, since the height H of the side portion 13 and the bottom portion 14 is larger than 1/2 of the depth D2 of the liquid tank 2, the bottom portion 14 can be positioned at a deep position in the liquid tank 2, and the side portion 13 can be located. A large water supply area can be secured, and the rebound of the water supply can be prevented from coming out of the liquid tank 2.

Further, the side portion 13 is formed in a conical base cylinder shape whose diameter increases toward the lower portion, and a large number of lateral grooves 16 extending in the circumferential direction are arranged side by side on the outer peripheral surface of the side portion 13. On the inner peripheral surface of the side portion 13, a large number of vertical grooves 17 extending in the vertical direction are arranged side by side along the circumferential direction, and a portion in contact between the horizontal groove 16 and the vertical groove 17 forms a through hole 18 of the side portion 13. The bottom portion 14 has an upper surface groove formed on its upper surface and a lower surface groove formed on its lower surface, and the upper surface groove is a vertical groove of the bottom portion 14 extending along a vertical direction which is one direction in a plan view. A large number of 22 are arranged side by side in a direction orthogonal to the vertical groove 22 of the bottom portion 14, and the lower surface groove is a horizontal groove 23 of the bottom portion 14 extending in a direction orthogonal to the vertical groove 22 of the bottom portion 14 in the bottom view. A large number are arranged side by side in the direction orthogonal to the lateral groove 23, and the portion where the lateral groove 23 of the bottom portion 14 and the vertical groove 22 of the bottom portion 14 are in contact with each other forms a through hole 24 of the bottom portion 14, so that the core, as described above, is formed. Injection molding is possible using a cavity and a pair of split molds, and the tubular body 10 can be easily molded. Further, since a truncated cone-shaped core whose diameter increases toward the upper part is used, a draft is provided and the core can be easily pulled out. Further, since the vertical groove 22 and the horizontal groove 23 of the bottom portion 14 are orthogonal to each other, the through holes 24 of the bottom portion 14 formed at the portion where the vertical groove 22 and the horizontal groove 23 of the bottom portion are in contact with each other have a fine substantially rectangular shape, and many of them have a fine substantially rectangular shape. Can be installed side by side.

Although the present invention has been specifically described above based on the embodiment, the present invention is not limited to the above embodiment, and for example, in the above embodiment, the upper surface groove of the bottom portion 14 is considered to be particularly suitable. Is a vertical groove 22, and the lower surface groove is a horizontal groove 23 orthogonal to the vertical groove 22, so that a large number of through holes 24 formed in a portion where the vertical groove 22 and the horizontal groove 23 of the bottom portion 14 are in contact with each other can be arranged side by side. However, the upper surface groove and the lower surface groove of the bottom portion 14 may have different shapes such as a large number of grooves arranged concentrically and a large number of grooves arranged radially. In short, a large number of upper surface grooves are arranged side by side on the upper surface of the bottom portion 14, and a large number of lower surface grooves intersecting a large number of upper surface grooves in the bottom surface view are arranged side by side on the lower surface of the bottom portion 14, and the upper surface groove and the lower surface are arranged side by side. If the portion intersecting and contacting the groove forms a through hole in the bottom portion 14, injection molding with a core, a cavity, and a pair of split dies can be performed, and the tubular body 10 can be easily formed. Can be molded into. In this case as well, the mold has a core having a second convex portion having a shape corresponding to the various upper surface grooves described above on the tip surface and a third convex portion having a shape corresponding to the various lower surface grooves described above on the upper surface. A cavity having a portion will be used.

Further, in the above embodiment, in order to facilitate the pulling out of the core, the side portion 13 has a truncated cone shape whose diameter increases toward the upper part, but it may also have a cylindrical shape. In this case, the core has a cylindrical shape, and the pair of split molds has a mold having a circular hole in the center divided in half along the axis.

Further, in the above embodiment, an application example to the backpack type power sprayer 1 is described as particularly preferable, but it can be applied to all backpack type work machines provided with a liquid tank device, and is also a traction type and a crawler type. It can also be applied to vehicles that run on front and rear wheels and have a liquid tank device.

The through holes 18 and 24 of the side portion 13 and the bottom portion 14 may be formed by a method other than injection molding.

2 ... Liquid tank, 8 ... Injection port, 10 ... Cylindrical body, 13 ... Side, 14 ... Bottom, 16 ... Side lateral groove, 17 ... Side vertical groove, 18 ... Side through hole, 22 ... Vertical groove (upper surface groove) at the bottom, 23 ... horizontal groove (lower surface groove) at the bottom, 24 ... through hole at the bottom, D1 ... diameter, D2 ... depth, H ... height.

Claims (2)

The cylinder of a liquid tank device including a liquid tank (2) for storing liquid and a cylindrical body (10) attached to an injection port (8) above the liquid tank (2) and provided with a filtering unit. In the shape (10), the side portion (13) and the bottom portion (14) of the cylindrical body (10) are provided with a large number of through holes (18, 24) constituting the filtration portion, and the side portion (13) is provided. ) Is formed in a cylindrical shape or a truncated cone shape whose diameter increases toward the upper part, and a lateral groove (16) extending in the circumferential direction is formed on the outer peripheral surface of the side portion (13) in the vertical direction. A large number of vertical grooves (17) extending in the vertical direction are arranged side by side along the circumferential direction on the inner peripheral surface of the side portion (13), and the horizontal groove (16) and the vertical groove are arranged side by side. The portion in contact with (17) forms the through hole (18) of the side portion (13), and a large number of upper surface grooves (22) are arranged side by side on the upper surface of the bottom portion (14) in a plan view. On the lower surface of the bottom portion (14), a large number of lower surface grooves (23) intersecting the large number of upper surface grooves (22) in a bottom view are arranged side by side, and the upper surface groove (22) and the lower surface groove (23) The portion in contact with the cylinder is the manufacturing device for the cylindrical body (10) of the liquid tank device forming the through hole (24) at the bottom (14).
It is formed in a cylindrical shape or a truncated cone shape whose diameter increases toward the upper part, and has an outer peripheral surface for forming an inner peripheral surface of the tubular body (10). A large number of first convex portions extending in the vertical direction corresponding to the vertical groove (17) of 13) are provided along the circumferential direction, and an upper surface of the bottom portion (14) of the cylindrical body (10) is formed. A core having a tip surface, the tip surface of which is provided with a large number of second convex portions corresponding to the upper surface groove (22) on the upper surface of the bottom portion (14).
The tubular body (10) has an upper surface for forming the lower surface of the bottom portion (14), and the upper surface thereof corresponds to the lower surface groove (23) on the lower surface of the bottom portion (14) and the tip of the core. A cavity having a large number of third convex parts intersecting the large number of the second convex parts of the surface, and a cavity having a large number of third convex parts.
The tubular body (10) is a mold having a circular hole or a truncated cone-shaped hole in the center that expands in diameter toward the upper part, and is split in half along the axis, and is abutted against each other. Has an inner peripheral surface for forming the outer peripheral surface of the above, and a fourth convex portion extending in the circumferential direction corresponding to the lateral groove (16) of the side portion (13) is formed on the inner peripheral surface along the vertical direction. With a pair of split molds with a large number,
When the mold is closed, a predetermined gap is provided between the cavity and the core, and a predetermined gap is provided between the pair of split molds butted so as to surround the core and the core. The first convex portion extending in the longitudinal direction of the outer peripheral surface of the core and the fourth convex portion extending in the circumferential direction of the inner peripheral surface of the split mold are in contact with each other, and the second convex portion of the tip surface of the core is in contact with the second convex portion. A device for manufacturing a tubular body (10) of a liquid tank device, wherein the portion and the third convex portion on the upper surface of the cavity are in contact with each other. The cylinder of a liquid tank device including a liquid tank (2) for storing liquid and a cylindrical body (10) attached to an injection port (8) above the liquid tank (2) and provided with a filtering unit. In the shape (10), the side portion (13) and the bottom portion (14) of the cylindrical body (10) are provided with a large number of through holes (18, 24) constituting the filtration portion, and the side portion (13) is provided. ) Is formed in a cylindrical shape or a truncated cone shape whose diameter increases toward the upper part, and a lateral groove (16) extending in the circumferential direction is formed on the outer peripheral surface of the side portion (13) in the vertical direction. A large number of vertical grooves (17) extending in the vertical direction are arranged side by side along the circumferential direction on the inner peripheral surface of the side portion (13), and the horizontal groove (16) and the vertical groove are arranged side by side. The portion in contact with (17) forms the through hole (18) of the side portion (13), and a large number of upper surface grooves (22) are arranged side by side on the upper surface of the bottom portion (14) in a plan view. On the lower surface of the bottom portion (14), a large number of lower surface grooves (23) intersecting the large number of upper surface grooves (22) in a bottom view are arranged side by side, and the upper surface groove (22) and the lower surface groove (23) The portion in contact with is a method for manufacturing the cylindrical body (10) of the liquid tank device forming the through hole (24) of the bottom portion (14).
It is formed in a cylindrical shape or a truncated cone shape whose diameter increases toward the upper part, and has an outer peripheral surface for forming an inner peripheral surface of the tubular body (10). A large number of first convex portions extending in the vertical direction corresponding to the vertical groove (17) of 13) are provided along the circumferential direction, and an upper surface of the bottom portion (14) of the cylindrical body (10) is formed. A core having a tip surface, the tip surface of which is provided with a large number of second convex portions corresponding to the upper surface groove (22) on the upper surface of the bottom portion (14).
The tubular body (10) has an upper surface for forming the lower surface of the bottom portion (14), and the upper surface thereof corresponds to the lower surface groove (23) on the lower surface of the bottom portion (14) and the tip of the core. A cavity having a large number of third convex parts intersecting the large number of the second convex parts of the surface, and a cavity having a large number of third convex parts.
The tubular body (10) is a mold having a circular hole or a truncated cone-shaped hole in the center that expands in diameter toward the upper part, and is split in half along the axis, and is abutted against each other. Has an inner peripheral surface for forming the outer peripheral surface of the above, and a fourth convex portion extending in the circumferential direction corresponding to the lateral groove (16) of the side portion (13) is formed on the inner peripheral surface along the vertical direction. Prepare a pair of split molds with a large number,
The cavity and the core are arranged with a predetermined gap, and a pair of the split molds are butted so as to surround the core and arranged with a predetermined gap between the cavity and the core to close the mold.
In this state, the first convex portion extending in the vertical direction of the outer peripheral surface of the core and the fourth convex portion extending in the circumferential direction of the inner peripheral surface of the split mold are brought into contact with each other, and the core is in contact with the fourth convex portion. The second convex portion on the tip surface is in contact with the third convex portion on the upper surface of the cavity.
Pour the molten resin into the gap and
After the molten resin has cooled, the core is pulled out upward, the cavity is moved downward, and the split molds are slid to be separated from each other in the lateral direction to open the mold.
The through hole (18) of the side portion (13) is formed in a portion where the first convex portion of the outer peripheral surface of the core and the fourth convex portion of the inner peripheral surface of the split mold are in contact with each other. The through hole (24) of the bottom portion (14) is formed in a portion where the second convex portion on the tip surface of the core and the third convex portion on the upper surface of the cavity are in contact with each other, and the tubular body (10) is formed. ), A method for manufacturing a tubular body (10) of a liquid tank device.

Images