JP2009287524A - Liquid feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid feeder achieving arrangement of pumps in a small space even if the number of pumps is increased and arranged according to a change in the number of supply portions, and to achieve the liquid feeder achieving the arrangement of the pumps in the small space by a simple structure without using a complicated mechanism. <P>SOLUTION: This liquid feeder includes: a liquid retaining casing 110 including one or more stackable ring-shaped sidewalls 112, a plurality of pumps 120 provided over substantially the whole periphery of the ring-shaped sidewalls, and a piston driving force transmission shaft 130 arranged to be vertically passed through the center of a liquid retaining area surrounded by the ring-shaped sidewalls and rotated around a shaft to thereby sequentially transmit driving force to the pistons 121 of the plurality of pumps arranged. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid supply apparatus for oil and other liquids such as lubricating oil, and more particularly to a liquid supply apparatus that performs liquid injection by driving a piston of a pump arranged in a ring shape around a rotation shaft.

For a machine that has many pistons, such as an automatic loom, and drives them at once, use lubricating oil in multiple locations simultaneously to prevent seizure of these many pistons. It is necessary to operate the machine while supplying In this way, when it is necessary to supply lubricating oil, fuel oil, etc. or other liquids in parallel at a plurality of locations, a plurality of pumps are conventionally provided in parallel in the length direction of the rotating shaft of the camshaft. A method of pumping up oil stored in an oil box or the like and discharging it by driving the pistons of these pumps in accordance with the rotation of the rotating shaft has been used. In addition, since the number of parts to be supplied may vary depending on the type and number of machines of the supply destination, in order to cope with this, there was a pump in which each pump was attached to the liquid supply device body so as to be detachable individually. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 11-062536

  However, in the conventional liquid supply apparatus, as described above, a plurality of pumps are arranged in parallel in the length direction of the rotating shaft of the camshaft. There was a problem that the device would have to be additionally arranged in the length direction, resulting in a long device in this direction.

  Therefore, the problem to be solved by the present invention is a liquid supply apparatus capable of arranging these pumps in a small space even when the number of pumps is increased according to the variation in the number of supply locations. Is to provide. Another object of the present invention is to provide a liquid supply apparatus capable of arranging a pump in such a small space by a simple mechanism without using a complicated mechanism.

  In order to solve the above problems, among the present invention, the first invention includes a liquid holding housing including a ring-shaped side wall that can be stacked one or more, a plurality of pumps provided over substantially the entire circumference of the ring-shaped side wall, From a piston driving force transmission shaft that transmits the driving force to the pistons of the plurality of pumps arranged in order by rotating the shaft arranged so as to vertically penetrate the center of the liquid holding region surrounded by the ring-shaped side wall A liquid supply apparatus is provided.

  Further, the second invention is based on the first invention, wherein the plurality of pumps receive a piston driving force from the inside of the ring-shaped side wall, and liquid is introduced into the cylinder through a hole provided in the ring-shaped side wall. Provided is a liquid supply device which is inhaled.

  A third invention provides a liquid supply apparatus based on the first or second invention, wherein the piston driving force transmission shaft is a camshaft, and the driving force is provided by a cam rotating on the shaft.

  Further, the fourth invention is based on any one of the first to third inventions, in order to adjust the supply / discharge timing of the pumps applied to the plurality of stacked ring-shaped side walls. A liquid supply apparatus capable of adjusting the overlapping angle of side walls is provided.

  According to the present invention, it is possible to provide a liquid supply apparatus capable of arranging these pumps in a small space even when the number of pumps is increased according to the variation in the number of supply points. Become. In addition, it is possible to provide a liquid supply apparatus capable of arranging the pump in such a small space with a simple mechanism without using a complicated mechanism.

  Examples of the present invention will be described below. The relationship between the embodiments and the claims is as follows. The first embodiment mainly relates to claims 1, 2, and 3, and the second embodiment mainly relates to claim 4 and the like. In addition, this invention is not limited to these Examples at all, and can be implemented in various modes without departing from the gist thereof.

<Overview>
The liquid supply apparatus according to the present invention includes a stackable liquid holding housing and a plurality of pumps arranged around the liquid holding housing, and sequentially applies a driving force by rotation of a shaft disposed at the center of the liquid holding area of the liquid holding housing. It is characterized in that it is transmitted to the piston of the pump.

  Further, the liquid supply device of this embodiment includes the transmission of the driving force from the inside of the ring-shaped side wall and the suction of the liquid into the cylinder through the hole provided in the ring-shaped side wall.

  The piston driving force transmission shaft is a cam shaft, and the driving force is given by a cam that rotates on the shaft.

<Configuration>
(General)
FIG. 1 is a conceptual diagram showing an example of a liquid supply apparatus of the present invention. As shown in the figure, the “liquid supply device” 0100 includes a “liquid holding housing” 0110, a plurality of “pumps” 0120, and a “piston driving force transmission shaft” 0130. In the example of this figure, a “motor” 0140 and a “supply tank” 0150 for supplying a liquid such as lubricating oil to the liquid supply device are shown. Among these, the motor is for transmitting driving force to the piston, and the supply tank is for supplying liquid to the liquid supply device via a “supply pipe” 0160. Furthermore, a “pour pipe” 0170 for supplying liquid to other machines to be supplied from the pump is also provided (in order to avoid complication, only one place is given a symbol, but it is connected to all pumps. ) This figure shows an example in which these motor, supply tank, supply pipe, and liquid injection pipe are also components of the liquid supply device, but these are not essential components of the liquid supply device, but are provided as external devices. May be.

  FIG. 2 is a view showing an example of the shape of the liquid supply apparatus of the present invention, and shows the same shape of the liquid supply apparatus as shown in FIG. However, in this figure, illustration of a motor, a supply tank, a supply pipe, a liquid injection pipe, and a part (upper part) of the piston drive transmission shaft 0230 is omitted. Among these, Fig.2 (a) is a top view of a liquid supply apparatus. As shown in this figure, six pumps 0220 are provided radially on the ring-shaped side wall 0212 of the liquid holding housing 0210 of the liquid supply apparatus 0200, and liquid is supplied from each pump simultaneously to each supply location. It becomes possible to do. From this figure, it can be seen that the liquid supply apparatus of the present invention has a structure capable of realizing liquid supply to a plurality of locations in a small space. FIG. 2B is a cross-sectional view taken along the line XX of FIG. As shown in the figure, the pump 0220 is provided in two upper and lower stages. In the example of this figure, the six pumps 0220 shown in (a) are provided in the upper and lower two stages at the same angle, and a total of twelve pumps are arranged. As a result, it is possible to supply the liquid to 12 supply locations in parallel. If the number of supply points further increases, it can be dealt with by further stacking ring-shaped side walls. From this figure, it can be seen that the liquid supply apparatus of the present invention has a structure that can be realized in a small space even when an additional pump is required.

(Liquid holding housing)
Returning to FIG. 1, each component of the liquid supply apparatus will be described next. First, the liquid holding housing will be described.

  The “liquid holding housing” 0110 is literally a housing for holding a liquid. For this reason, the liquid holding housing is provided with “ring-shaped side walls” 0112 that can be stacked one or more, and is a tank for holding the liquid in the central portion and is formed from the ring-shaped side walls and the bottom of the housing. Tank "0111 is provided. In the example of this figure, the liquid supplied from the supply pipe 0160 is taken into the housing (inside the ring-shaped side wall) from the intake (not shown) provided in the outer wall of the ring-shaped side wall of the liquid holding housing. It is discharged from the outlet 0115 provided on the inner wall side of the ring-shaped side wall through the pipe 0114 provided to the liquid storage tank and stored. Examples of the liquid to be supplied in the present invention include oils such as lubricating oil and fuel oil, and water and other liquids such as cooling water and washing water.

  Further, the liquid holding housing is configured to be capable of stacking one or more ring-shaped side walls. In the example of this figure, a state in which two ring-shaped side walls 0112 are stacked is shown, but the number of stacks is not limited. The reason why one or more ring-shaped side walls can be stacked in this way is to make this possible in a small space when it is necessary to add more pumps.

(Ring side wall)
The “ring-shaped side wall” 0112 is provided in the liquid holding housing as described above. The ring-shaped side wall forms a part of a liquid storage tank for holding liquid together with the bottom surface of the housing.

  Moreover, the hole 0113 may be provided in the ring-shaped side wall. A driving force from a piston driving force transmission shaft, which will be described later, is transmitted to the pump through this hole. Although not shown in the figure, the ring-shaped side wall may be provided with a hole for sucking the liquid in the liquid storage tank into the cylinder constituting the pump through this hole (see another figure later). To show). In these cases, the hole for sucking the liquid and the hole for transmitting the driving force may be provided separately or in common.

  The ring-shaped side wall mediates transmission of driving force and liquid suction to the plurality of pumps arranged substantially on the circumference as described above. Accordingly, it is desirable that the shape (the shape seen in the plan view) is a substantially circular shape or a substantially polygonal shape in accordance with the arrangement of the pump. What is shown in FIG. 1 is a suitable example in which the shape of the ring-shaped side wall is a substantially hexagonal shape.

  FIG. 3 is a diagram showing an example of the shape of the ring-shaped side wall. FIG. 3A is a perspective view showing the shape of the ring-shaped side wall 0312, which is different from the substantially hexagonal shape shown in FIG. FIG. 3B is a sectional view taken along line XX in FIG. In the example of this figure, a plurality of (six in this figure) holes 0313 are provided in the ring-shaped side wall. The driving force from the piston driving force transmission shaft is transmitted to the pump through this hole, and the liquid held in the liquid holding housing (liquid storage tank) is sucked into the cylinder constituting the pump. That is, the example in this figure is an example in which the hole for sucking the liquid and the hole for transmitting the driving force are common, but as described above, the liquid held in the liquid holding housing is put into the cylinder. A hole for inhalation and a hole for transmitting a driving force to the pump may be provided separately.

(Piston drive transmission shaft)
Returning to FIG. 1 again, the configuration of the piston drive transmission shaft will be described.
The “piston drive transmission shaft” 0130 is disposed so as to vertically penetrate the center of the liquid holding region surrounded by the ring-shaped side wall 0112, and is connected to the pistons 0121 of the plurality of pumps 0120 disposed by rotating the shaft. It is configured to transmit the driving force sequentially. For example, as shown in FIG. 1, this driving force is given by driving a motor 0140 connected directly or indirectly to a piston drive transmission shaft.

  The piston driving force transmission shaft is preferably a camshaft. The example in this figure is also an example in which the piston driving force transmission shaft is a camshaft. As shown in this figure, the lower portion of the camshaft is an eccentric cam (hereinafter simply referred to as “cam”) 0131, The driving force is transmitted to the piston through the roller 0124 and the roller holding portion 0123 by rotation (in order to avoid complication, the roller and the roller holding portion are provided with symbols only at one place. Each connected).

  Then, next, the specific structure for transmitting a drive to a piston by rotation of a cam is demonstrated.

  FIG. 4 is a diagram illustrating an example of the shape of a camshaft and a cam attached to the camshaft. The camshaft and cam shown in this figure are the same in shape as those shown in FIG. As shown in FIG. 1, two cams 0431a and 0431b are attached to a camshaft 0430, which is a piston drive transmission shaft, corresponding to the fact that the liquid holding housings are stacked in two upper and lower stages. In the example of this figure, two cams of the same shape are mounted at different angles, and the upper cam 0431a has a long distance from the center of the cam (that is, the center of the piston drive transmission shaft) to the edge of the cam. The lower cam 0431b is attached to a position that is generally in the lower left direction as viewed from the front, and in the lower cam 0431b. In addition, unlike the example of this figure, two cams of the same shape may be attached at the same angle, or cams of different shapes and sizes may be attached. Further, three or more cams may be attached corresponding to the fact that the ring-shaped side walls are stacked in three or more stages.

  As described above, when this cam rotates, the driving force is transmitted to the piston via the roller and the roller holding portion. Specifically, as shown in FIG. 1, a roller 0124 attached to the piston rear end of each pump is in contact with the cam, and rotates in the opposite direction to the cam in accordance with the rotation of the cam. . The roller holding portion that rotatably holds the roller is fixed to the rear end of the piston. As will be described later, the piston reciprocates in the cylinder while being urged toward the cam by the urging force of the spring in the cylinder. It is held so that it can move. Therefore, as the cam rotates, the distance from the center of the cam to the edge of the cam in contact with each roller expands and contracts, and the roller reciprocates as it is pushed out toward the cylinder or approaches the cam center. As a result, the piston fixed to the roller holding portion that holds the roller also reciprocates in the cylinder. With this configuration, it is possible to sequentially transmit the driving force applied by the cam rotating around the camshaft to the piston via the roller and the roller holding portion, and to sequentially reciprocate the piston.

  As will be described later, when the piston is pushed out toward the front end of the cylinder, the liquid is discharged from the pump. In this case, the shape of the cam and the mounting angle are matters that can be arbitrarily designed. By arbitrarily changing the shape and mounting angle of the cam, it becomes possible to inject liquid while sequentially moving each piston at a desired timing.

  FIG. 5 is a diagram illustrating an example of a configuration for arbitrarily changing the attachment angle of the cam. FIG. 5A is a horizontal sectional view showing an example of the shape of the camshaft (the cross section may be at an arbitrary position). The camshaft 0530 in this figure has a circular gear shape in which a plurality of teeth 0530a (only one symbol is attached for the sake of simplicity) are arranged around the camshaft 0530 (the center of the circular gear is the center of the camshaft). Match). Each tooth has the same shape and is provided at equiangular intervals. In the example of this figure, 45 blades of the same shape are provided at equal angular intervals of 8 degrees.

  FIG. 5B is a horizontal sectional view showing an example of the shape of the cam (the cross section is a surface having the same height as the camshaft). The cam 0531 in this figure has a circular gear-shaped opening portion 0531a centering on an eccentric point on the cam. The shape of the opening portion exactly matches the shape of the camshaft shown in FIG. Therefore, the camshaft to which the cam shown in FIG. 4 is attached can be formed by fitting the camshaft shown in FIG. 5A into the opening portion of the cam shown in FIG. 5B.

(pump)
Returning to FIG. 1, the configuration of the pump will be described next.
A plurality of “pumps” 0120 are arranged so that each receives a piston driving force through a hole 0113 provided in the ring-shaped side wall 0112 and sucks liquid into the cylinder through the hole provided in the ring-shaped side wall. It is configured. The “pump” includes a “piston” 0121, a “cylinder” 0122, a “roller holding part” 0123, and a “roller” 0124. Here, the configuration of the roller and the roller holding portion will be described first in relation to the description of the cam and camshaft above.

  FIG. 6 is a diagram illustrating an example of the shape of the roller and the roller holding portion. In the example of this figure, a roller 0624 is fitted in a recess provided at the tip of the roller holding portion 0623, and this roller is a screw 0623a that vertically penetrates the roller holding portion (the portion shown in the figure is the screw head). ) Is held rotatably. An arrow AA ′ direction indicates a rotation direction of the roller.

  Further, the roller reciprocates in such a manner that the roller is pushed in the cylinder direction or approaches the cam center in accordance with the expansion and contraction of the distance between the cam edge contacting each roller and the cam center due to the rotation of the cam. The arrow BB ′ direction indicates the reciprocating direction of the roller.

  In addition, the roller holding part may be attached to the piston rear end as an independent member, or may be a part of the piston. In the latter case, for example, the rear end of the piston has the shape of a roller holding portion as shown in FIG. 6, and the piston itself is configured to hold the roller.

(piston)
The “piston” reciprocates in the cylinder when a driving force is applied from a piston driving force transmission shaft that rotates about the shaft. Regarding the mechanism of driving force transmission to the piston, as already described in the description of the cam and roller, the piston driving force transmission shaft (cam shaft) and the roller contacting the cam rotate in the opposite direction due to the rotation of the cam. The piston is reciprocated by reciprocating in the longitudinal direction of the cylinder of the pump.

  When the distance from the center of the cam to the edge of the cam contacting the roller is extended by the rotation of the cam, the piston is pushed out toward the front end of the cylinder. When the cam further rotates and the distance from the center of the cam to the edge of the cam in contact with the roller is reduced, the piston is pushed back toward the rear end of the cylinder (that is, toward the center of the cam). In order to allow the piston to reciprocate, for example, a coil spring is arranged around the piston. The piston 0121 shown in FIG. 1 is also an example in which a coil spring 0125 is arranged around it. The coil spring is fixed to the cylinder at the tip of the cylinder. Therefore, when the piston is pushed out toward the front end of the cylinder, the coil spring is contracted and an urging force is exerted to push the piston back toward the cam center. Therefore, when the distance from the center of the cam to the edge of the cam in contact with the roller is reduced, the biasing force pushes the piston back (detailed later with reference to another drawing). By such reciprocating motion of the piston, the liquid sucked into the cylinder can be discharged to the liquid injection target portion via the liquid injection pipe when the piston is pushed out toward the front end of the cylinder.

(cylinder)
The “cylinder” holds the piston in a reciprocable manner, sucks the liquid held in the liquid storage tank through the hole provided in the ring-shaped side wall, and supplies the liquid to the liquid injection target location through the liquid injection pipe. For holding it for discharge.

(Piston drive and liquid suction / discharge procedure)
An example of how to drive the piston using the pump having the above configuration, suck the liquid from the liquid storage tank, and discharge the liquid to the injection target portion will be described.

  FIG. 7 is a conceptual diagram showing an example of piston driving and liquid suction / discharge procedures of the pump. This figure shows a vertical section of the same pump as shown in FIG. 1 (however, only the coil spring 0725 is shown in a side view for the sake of clarity).

  7A shows a state where the distance from the center of the cam 0731 (not shown in the drawing) to the edge of the cam (indicated by arrow C) in contact with the roller 0724 is the shortest. As shown in the figure, the roller is rotatably held on the roller holding portion by a screw 0723a penetrating the roller holding portion 0723 vertically. The roller holding portion is attached and fixed to the rear end of the piston 0721 (indicated by the arrow D). This piston is held in the cylinder 0722 so as to be capable of reciprocating in the longitudinal direction of the cylinder (indicated by arrows BB ′).

  As shown in this figure, the piston preferably has a cylindrical shape in which the diameter in the vicinity of the tip (indicated by arrow E) is substantially equal to the inner diameter of the cylinder, and a cylindrical shape in which the diameter of the rear portion is slightly shorter (see FIG. For the sake of convenience, the former will be referred to as “large diameter cylinder” and the latter as “small diameter cylinder”). This makes it easy to discharge the liquid (shown by diagonal lines) stored in the liquid storage tank to the liquid injection pipe 0770 through the tip of the piston, and as will be described later, a coil spring is provided around the small diameter cylinder to cam the piston. This is for biasing in the center direction.

  In this figure, a hole 0713a for transmitting a driving force to the piston and a hole 0713b for sucking liquid into the cylinder are separately provided. Therefore, in the example of this figure, a passage 0780 extending from the hole 0713b to the cylinder tip is provided in the ring-shaped side wall, and the liquid is sucked between the piston tip and the cylinder tip through the passage. .

  A coil spring 0725 is provided in the cylinder so as to surround the periphery of the small diameter cylindrical portion of the piston. The tip of this coil spring (indicated by arrow F) is fixed to the cylinder. As this fixing method, for example, a donut-shaped metal net provided with a central hole in which a small-diameter cylindrical portion can move is fixedly arranged on a vertical cross section of the cylinder at the position, and the tip of a coil spring is attached in the vicinity of the central hole. .

  FIG. 7B shows the distance from the center of the cam 0731 (not shown in the figure) to the edge of the cam contacting the roller 0724 (indicated by arrow C) as the cam rotates from the state of FIG. Indicates the most extended state. As described above, the roller 0724 is in contact with the cam and rotates in the opposite direction to the cam. Therefore, during the transition from the state of FIG. 7A to the state of FIG. Is pushed into the cam while rotating and moves in the right direction (arrow B ′ direction). As a result, the piston fixed to the roller holding portion is also pushed together, and the piston tip (indicated by arrow E) moves rightward by the same distance and reaches the cylinder tip. Therefore, the liquid held in the portion between the piston tip and the cylinder tip is discharged to the liquid injection pipe 0770 by the tip portion of the piston.

  Here, as described above, the tip of the coil spring is fixed to the cylinder, and the tip position (indicated by arrow F) of the coil spring does not move even if the piston moves to the right. In addition, the end surface on the tip side of the roller holding portion has a shape and size that the coil spring cannot slip through and move. Therefore, when the end surface on the front end side of the roller holding portion (that is, the rear end of the piston 0721, indicated by arrow D) moves in the right direction, the rear end of the coil spring also moves in the right direction while being pushed by this. As a result, the coil spring is compressed and an urging force is exerted in the left direction.

  Therefore, as the cam further rotates from the state of FIG. 7B and the distance from the center of the cam to the edge of the cam in contact with the roller is reduced again, the end surface on the tip side of the roller holding portion is biased by the coil spring. Thus, the roller holding part moves to the left while maintaining the contact state with the cam via the roller. As a result, the distance from the cam center to the cam edge as shown in FIG. The reciprocating motion of the piston is realized by repeating this process.

  FIG. 8 is a conceptual diagram showing another example of the piston drive of the pump and the liquid suction / discharge procedure. In the figure, the piston driving procedure is the same as in the example of FIG. 7, but the liquid suction / discharge procedure is different. That is, in the case shown in FIG. 7, the hole for sucking the liquid into the cylinder is provided separately from the hole for transmitting the driving force to the piston, that is, the hole through which the piston reciprocates. On the other hand, in this figure, a hole for transmitting a driving force to the piston and a hole for sucking the liquid into the cylinder are provided as one common hole 0813. Therefore, in the example of this figure, the liquid stored in the liquid storage tank is sucked into the cylinder 0822 through the hole and filled up to the tip of the cylinder. In order to suck the liquid up to the portion between the piston tip and the cylinder tip, for example, a through-hole 0821a with a check valve penetrating in the cylinder major axis direction may be provided in the large-diameter cylinder of the piston.

<Effect>
The invention of this embodiment provides a liquid supply apparatus capable of arranging these pumps in a small space even when the number of pumps is increased according to the variation in the number of supply points. Is possible. In addition, it is possible to provide a liquid supply apparatus capable of arranging the pump in such a small space with a simple mechanism without using a complicated mechanism.

<Overview>
The liquid supply apparatus of this embodiment is basically the same as the liquid supply apparatus of the first embodiment. However, the liquid supply apparatus of the present embodiment is characterized in that the overlap angle of the stacked ring-shaped side walls can be adjusted in order to adjust the supply / discharge timing of the pumps applied to the plurality of stacked ring-shaped side walls. There is.

<Configuration>
(General)
The liquid supply apparatus of this embodiment also includes a “liquid holding housing”, a “pump”, and a “piston driving force transmission shaft”. In addition, a “motor”, “supply tank”, “supply pipe”, and “liquid injection pipe” may be provided. The configuration of each of these components is basically the same as that of the first embodiment. Also in this embodiment, the piston drive transmission shaft is preferably a camshaft.

  The feature of the liquid supply apparatus of the present embodiment is that the overlapping angle of the stacked ring-shaped side walls can be adjusted in order to adjust the supply / discharge timing of the pumps applied to the plurality of stacked ring-shaped side walls. .

(An example of a specific configuration for adjusting the overlap angle of the stacked ring-shaped side walls)
An example of a specific configuration for adjusting the overlapping angle of the stacked ring-shaped side walls according to this embodiment will be described below.

  FIG. 9 is a diagram illustrating an example of a specific configuration for adjusting the overlapping angle of the stacked ring-shaped side walls. This figure shows an example of a plan view of a ring-shaped side wall provided with joint portions (for example, concave portions provided on the upper surface of the housing) 0916a (indicated by white circles) and 0916b (indicated by black circles) for stacking the ring-shaped side walls. Unlike the one shown in FIG. 1, the ring-shaped side wall in this figure has a substantially circular shape. In order to avoid complications, the joints indicated by white circles and the joints indicated by black circles are each provided with a reference numeral, but there are six places alternately and a total of 12 places.

  Although not shown in the drawing, a total of six convex joints are provided on the lower surface of the ring-shaped side wall at positions corresponding to the joints 0916a indicated by the white circles, for example, and the upper surface of one ring-shaped side wall is provided. The ring-shaped side wall can be stacked by fitting the convex-shaped joint portion on the lower surface of the other ring-shaped side wall into the concave-shaped joint portion. At this time, the overlap angle of the stacked ring-shaped side walls is adjusted depending on where the convex joints on the lower surface of the other ring-shaped side wall are fitted to the plurality of concave-shaped joint portions on the upper surface of the one ring-shaped side wall. It can be performed.

  Also in FIG. 1 described above, the joint portion 0116 on the upper surface of the ring-shaped side wall appears. Therefore, in the example of FIG. 1 as well, the upper ring-shaped side wall of the two stacked ring-shaped side walls can be rotated and rotated again by 60 degrees in the horizontal direction. However, in this example, even if the ring-shaped side wall is rotated, the position of the roller holding portion and the roller attached to the rear end of each pump is completely interchanged. And this does not affect the timing of pump supply and discharge.

  On the other hand, in the case of the ring-shaped side wall upper surface shown in FIG. 9, unlike the example of FIG. Here, the ring-shaped side wall shown in FIG. 9 also has six pumps 0920 (shown by broken lines) arranged at equiangular intervals (60-degree intervals) in the same manner as shown in FIG. As shown). The pumps are respectively arranged outside the six joints 0916a indicated by white circles (strictly speaking, on the extension line of the diameter passing through the joints indicated by the white circles (this line is referred to as “pump diameter line” for convenience)). ing. Therefore, when another ring-shaped side wall is stacked on this ring-shaped side wall, the convex joints on the pump diameter line of the other ring-shaped side wall are indicated by white circles shown by arrows as shown in FIG. When fitting to the joint 0916a of the pump, that is, the joint on the pump diameter line (in a case of being overlapped on the white circle in a flat manner), the joints on the pump diameter line are overlapped, so that the rings stacked vertically The pumps on the side walls overlap with each other (the same state as in FIG. 1).

  On the other hand, as shown in FIG. 9 (b), when fitting into a black circle joint 0916b indicated by an arrow, that is, a joint that is not on the pump diameter line (in a case of being overlapped on the black circle in a plain manner), the pump Since the joint portion on the diameter line and the joint portion not on the pump diameter line are overlapped, the pumps of the ring-shaped side walls stacked up and down are shifted by 30 degrees vertically. That is, when the state of FIG. 9A is compared with the state of FIG. 9B, since the cam mounting angle does not change between the two, each pump of the housing located on the upper side rotates 30 degrees, Changes in the timing of the reciprocating movement and the supply / discharge timing of the pump. In this way, it is possible to adjust the supply / discharge timing of the pumps applied to the plurality of stacked ring-shaped side walls.

<Effect>
According to the present invention, it is possible to adjust the overlapping angle of the stacked ring-shaped side walls, and it is possible to adjust the supply / discharge timing of the pumps applied to the plurality of stacked ring-shaped side walls.

The conceptual diagram which shows an example of the liquid supply apparatus of this invention The figure which shows an example of the shape of the liquid supply apparatus of this invention The figure which shows an example of the shape of a ring-shaped side wall Conceptual diagram showing an example of the shape of a camshaft and a cam attached to the camshaft The figure which shows an example of the structure for changing the attachment angle of a cam arbitrarily The figure which shows an example of the shape of a roller and a roller holding | maintenance part Conceptual diagram showing an example of pump drive and liquid suction / discharge procedure Conceptual diagram showing an example of pump drive and liquid suction / discharge procedure The figure which shows an example of the concrete structure for adjustment of the overlap angle of the ring-shaped side wall laminated | stacked

Explanation of symbols

0100 Liquid supply unit 0110 Liquid holding casing 0111 Liquid storage tank 0112 Ring-shaped side wall 0113 Hole 0114 Pipe 0115 provided inside the casing Outlet 0116 Joint portion 0120 on the top surface of the ring-shaped side wall Pump 0121 Piston 0122 Cylinder 0123 Roller holding section 0124 Roller 0130 Piston driving force transmission shaft 0131 Eccentric cam 0140 Motor 0150 Supply tank 0160 Supply pipe 0170 Injection pipe

Claims (4)

A liquid holding housing including one or more stackable ring-shaped side walls;
A plurality of pumps provided over substantially the entire circumference of the ring-shaped side wall;
A piston driving force transmission shaft that sequentially transmits a driving force to the pistons of the plurality of pumps arranged by rotating and axially rotating the central part of the liquid holding region surrounded by the ring-shaped side wall;
A liquid supply device comprising:   2. The liquid supply device according to claim 1, wherein the plurality of pumps receive a piston driving force from the inside of the ring-shaped side wall and suck liquid into the cylinder through a hole provided in the ring-shaped side wall. .   The liquid supply apparatus according to claim 1, wherein the piston driving force transmission shaft is a camshaft, and the driving force is provided by a shaft rotating shaft.   The liquid supply according to any one of claims 1 to 3, wherein an overlap angle of the stacked ring-shaped side walls can be adjusted in order to adjust a supply / discharge timing of the pump applied to the plurality of stacked ring-shaped side walls. apparatus.

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