JP5876452B2 - Distribution valve and gasket - Google Patents

Description

  The present invention relates to a distribution valve that distributes injected fluid from a plurality of discharge ports, and more specifically, a distribution valve and a gasket in which a plurality of pistons are sequentially driven by the injected fluid and fluid is sequentially delivered from the plurality of discharge ports. About.

In large trucks, buses, construction machines, industrial machines, and the like, a lubricant (fluid) is distributed to each part using a distribution valve in order to supply to many lubricated parts such as bearings.
There is a great demand for such a distribution valve to distribute from one place to many lubricated parts. Therefore, in a multi-part distribution valve, as disclosed in FIG. 1 of Patent Document 1, a column-shaped aluminum die-cast main body is provided with a plurality of injection ports and two rows arranged in parallel in the longitudinal direction. An integrally molded product provided with a piston, a discharge port for each piston, and a lubricant passage that sequentially drives each piston with a lubricant injected from a supply pump and feeds the lubricant in order from each discharge port is used.

Japanese Patent Laying-Open No. 2004-232687 (FIG. 1)

In such a distribution valve formed by one block, the number of discharge ports for distributing the lubricant is uniquely determined based on, for example, 8 ports. For this reason, for example, when supply of lubricant is required to more than eight parts to be lubricated, it is not possible to cope with a single distribution valve. For example, auxiliary metal fittings or piping members are added to a distribution valve having eight discharge ports. The number of distribution ports is increased by connecting a plurality of distribution valves separately.
However, since the integral-type product distribution valve is a costly product, in order to increase the number of units in this way, using multiple integral-type product distribution valves, even if the required distribution can be achieved, the cost is considerably high. Burden is imposed. In addition, an installation space for installing a plurality of distribution valves is required, and there is a problem that auxiliary metal fittings and piping members are separately required.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a distribution valve and a gasket that can appropriately deal with a large number of distribution locations with one product.

The distribution valve according to the first aspect of the invention of claim 1 includes an inlet through which fluid is injected, a plurality of reciprocating first pistons, and a first discharge for each first piston. A first block portion provided with an outlet and a first fluid path through which fluid from the inlet circulates; a second block piece stackable with the first block portion; a plurality of second pistons capable of reciprocating; , A second block part provided with a second discharge port for each second piston and a second fluid passage through which fluid from the injection port circulates, and a request between the first block part and the second block part. A third block portion that can be stacked according to the number of discharge ports to be stacked, and the third block portion includes a plurality of third block pieces that can be stacked with the first block portion and the second block portion. A third piston capable of reciprocating, and a third discharge port for each third piston; , A third fluid path through which the fluid from the inlet circulates, and the first fluid path, the second fluid path, and the third fluid path are the first block portion, and the number of third fluids selected according to demand. When the block portion and the second block portion are overlapped, the first to third pistons are sequentially driven by the fluid injected from the inlet, and the fluid is supplied according to the sliding displacement of the first to third pistons. The route is set to be distributed and sent out from each of the first to third discharge ports.

In the distribution valve according to the first aspect of the invention of claim 2, the first to third block portions are fastened to each other by the fastening members from the overlapping direction.
The distribution valve according to the first aspect of the invention of claim 3 has a seal portion between the respective block portions of the overlapping first to third block portions, and through the block portions of the first to third fluid paths. The passage portion communicating between the pistons has a passage formed in the seal portion and a through hole formed in each block piece sandwiching the passage and communicating between the pistons via the passage. did.

In the distribution valve according to the first aspect of the invention of claim 4, the seal portion includes a substrate portion disposed between the first to third block portions, a passage opening formed in the substrate portion, An elastic seal portion provided at each of the outer peripheral edge portion and the edge portion of the passage opening is provided.
The gasket according to the first aspect of the invention of claim 5 includes a substrate disposed between sealed members to be sealed, a passage opening formed in the substrate, an outer peripheral edge portion of the substrate, and an edge portion of the passage opening. It has decided to have the elastic sealing material provided, respectively.

According to the distribution valve of the first aspect of the present invention, the quantity of the third block part interposed between the first block part having the injection port and the second block part is changed to the quantity of the required distribution part. Accordingly, by appropriately increasing or decreasing the number, it is possible to obtain a distribution valve having a discharge port corresponding to the required distribution amount of the lubricant with one product. As a result, even a large number of distribution locations can be handled by a single distribution valve (product), and even if there are many locations where fluid is distributed, there is no need to use auxiliary metal fittings or piping members.
Therefore, even if there are many places to distribute, the cost required for distribution is low. Moreover, compared to the case where a plurality of distribution valves are used, the installation space for installing the distribution valves is reduced, and the piping connected to the distribution valves is simplified.

According to the distribution valve of the second aspect of the present invention, it is possible to easily assemble various distribution valves with different numbers of discharge ports with a simple structure.
According to the distribution valve of the invention of claim 3, the passage portion communicating between the pistons through the overlapping block portions does not require three-dimensional processing, and forms the passage of the seal portion and the block piece. It can be realized by a two-dimensional passage, and the first to third fluid paths can be easily formed.

According to the distribution valve of the fourth aspect of the present invention, the passage portion sealed under high surface pressure can be formed between the first to third block portions by the seal portion in which the base plate portion and the elastic seal portion are combined. As a result, a passage portion that is free from the risk of fluid leakage can be secured between the first to third block portions, and the fluid is always well distributed no matter what pressure of fluid is distributed. be able to.
According to the gasket of the fifth aspect of the present invention, the gasket structure in which the elastic sealing material is combined with the substrate having the passage opening, the gasket is disposed between the sealed members, and the sealed members are sealed under high surface pressure. Can be easily formed.

The perspective view which shows the external shape of the distribution valve which concerns on one Embodiment of this invention. The side view seen from the arrow A in FIG. The rear view seen from the arrow B in FIG. The side view which shows the structure which can increase / decrease the number of ports of the distribution valve. The disassembled perspective view which decomposed | disassembled the distribution valve for every block part. FIG. 5 is a plan sectional view of the first block portion taken along line CC in FIG. 4. FIG. 5 is a plan sectional view of a third block portion taken along the line DD in FIG. 4. The plane sectional view of the 2nd block part which meets the EE line in FIG. The top view which shows the gasket interposed between block parts. Sectional drawing of a part of gasket which follows the FF line in FIG. The perspective view which shows roughly the path | route of the distribution valve set by the 1st, 2nd, 3rd lubrication path. Sectional drawing which expand | deployed the distribution valve of FIG. 2 from the GG line. The disassembled perspective view which shows the distribution valve set to different number of ports (the number of discharge ports: 16 ports). The disassembled perspective view which shows the distribution valve set to different number of ports (the number of discharge ports: 8 ports).

Hereinafter, the present invention will be described based on an embodiment shown in FIGS.
FIG. 1 shows the external appearance of a vertical distribution valve that distributes a fluid, for example, a viscous fluid, specifically, a lubricant having viscosity such as grease, and FIGS. 2 and 3 show a side surface and a rear surface of the distribution valve, respectively. FIG. 4 shows the basic structure of the distribution valve.

  As shown in FIGS. 1 to 4, the vertical distribution valve includes a top block 1 (corresponding to the first block portion of the present application) disposed at the uppermost portion and a base block 30 (the first block of the present application) disposed at the lowermost portion. 2 blocks) and an intermediate block 60 (corresponding to the third block of the present application) interposed between the top block 1 and the base block 30, and by superimposing these, Is configured. In particular, the intermediate block 60 has, for example, the same structure (common), and a selectable number is prepared. A plurality of intermediate blocks, for example, three intermediate blocks 60 are prepared in FIG. The top block 1, the base block 30, and the intermediate block 60 all correspond to a member to be sealed of the present application (Claim 5).

  The distributing valve selects the number of intermediate blocks 60 according to the required quantity of lubricant supply locations, and appropriately selects the number of seal blocks, for example, separate parts, between the top block 1 and the base block 30. It is arranged together with the gasket 2 (which seals between the blocks) which is the seal portion. Here, the required number of discharge ports, that is, the required number of distribution ports is secured (set) by overlapping the intermediate block 60 in one or two stages according to the required number of discharge ports. That is, the distribution valve is a division type in which the number of distribution ports is set as appropriate when the number of intermediate blocks 60 is varied.

  FIGS. 1 to 3 show a distribution valve when the number of distribution ports is increased from, for example, 8 ports as a reference to 12 ports using the same structure. FIG. 5 is an exploded view of the distribution valve, and FIGS. 6 to 8 are plan sectional views of the top block 1, the intermediate block 60, and the base block 30 that are parts of the distribution valve. 9 and 10 are a plan view and a cross-sectional view of the gasket 2 disposed between the blocks. FIG. 12 shows a continuous cross section of each of the top block 1, the intermediate block 60, and the base block 30 in which the distribution valve is developed from the line GG in FIG. FIG. 11 schematically shows the route of the lubricant in the distribution valve.

  If the top block 1 is demonstrated, the main body of the top block 1 is comprised from the block piece 3 (equivalent to the 1st block piece of this application) formed in the square flat shape, for example (FIGS. 1-6). In the center of the upper part of the block piece 3, a mouth part 5 containing a check valve 5a (schematically shown in FIGS. 5 and 11) is provided. In the present embodiment, the mouth part 5 is disposed sideways, for example. An injection port 7 into which a lubricant such as grease is injected is formed from the tip of the mouth part 5. In the present embodiment, the direction in which the inlet 7 faces is the front side, and the opposite side is the back side. The injection port 7 communicates with a vertical through hole 9 (through hole) that opens in the lower center surface of the block piece 3.

  In the block piece 3, as shown in FIG. 6, for example, a pair (two) of piston holes (through holes) are provided at positions on both sides of the through hole 9 in a direction orthogonal to the mouth portion 5. Is provided. Openings at both ends of each piston hole are closed by the plug member 11 to form a pair of piston chambers 13a and 13b arranged in parallel in a direction perpendicular to the thickness direction of the block piece 3 in the left-right direction. Pistons 15a and 15b (corresponding to the first piston of the present application) are accommodated in the side-by-side piston chambers 13a and 13b so as to reciprocate, and press chambers 16a and 16b are formed on the end sides of the pistons 15a and 15b, respectively. doing.

  Each of the pistons 15a and 15b has a small-diameter stepped portion 17a at the axially central portion, and has a pair of groove portions on both sides of the stepped portion 17a, for example, an annular groove 17b having a triangular cross section. A pair of discharge ports 19a and 19b that are opened and closed by a piston 15a are provided on the front surface of the block piece 3 (the surface on which the injection port 7 is formed). The rear surface of the block piece 3 on the opposite side (surface opposite to the injection port 7) is provided with a discharge port that is opened and closed by the piston 15b, for example, a pair of discharge ports 19c and 19d (both are the first of the present application). Equivalent to one discharge port: 2 for each first piston). More specifically, the discharge ports 19a and 19b are arranged at positions alternately communicating with the pair of annular grooves 17b for each displacement of the piston 15a in the reciprocating direction, and the discharge ports 19c and 19d are arranged in the reciprocating direction of the piston 15b. Is disposed at a position alternately communicating with the pair of annular grooves 17b.

  The lower surface of the block piece 3 is an overlapping surface that can be overlapped with an intermediate block 60 described later. Of these lower surfaces, the lower surface portion facing the piston 15a has a relay hole 21a (vertical hole) opened vertically at the center position aligned with the through hole 9, and vertically oriented on both sides of the relay hole 21a. A pair of relay holes 21b (vertical holes) are opened. More specifically, the relay hole 21a is disposed at a position communicating with the stepped portion 17a regardless of the displacement of the piston 15a in the reciprocating direction, and the relay hole 21b is provided for each displacement of the piston 15a in the forward / backward direction. These are disposed at positions alternately communicating with the annular grooves 17b on both sides. In addition, the relay hole 21b is comprised from two parallel through-holes here so that the level | step-difference part 17a may communicate alternately.

  A relay hole 23a (vertical hole) is opened in the lower surface portion of the block piece 3 that faces the piston 15b, along with the through hole 9, and a pair of relay holes at positions on both sides of the relay hole 23a. 23b (vertical hole) is opened. More specifically, the relay hole 23a is disposed at a position communicating with the stepped portion 17a regardless of the displacement of the piston 15b in the reciprocating direction, and the relay hole 23b is provided for each displacement of the piston 15b in the forward / backward direction. It arrange | positions in the position opened and closed by the edge part of piston 15b which goes in and out to the press chambers 16a and 16b.

  A pair of relay holes 27 having one end communicating with the pressing chambers 16a and 16b on both ends of the piston chamber 13a and the other end communicating with the center of the piston chamber 13b are provided inside the center of the block piece 3. Yes. One end of the relay hole 27 is disposed at a position where it is alternately opened and closed by the end of the piston 15a entering and exiting the pressing chambers 16a and 16b, and the other end is stepped at every displacement of the piston 15b in the forward / backward direction. It arrange | positions in the position which communicates with the part 17a alternately. From these various relay holes, the first lubricant passage X which is the first fluid passage of the present application is constituted. Incidentally, bolt insertion holes 28 a are provided on the four corner sides of the block piece 3.

The base block 30 will be described. The main body is composed of a block piece 33 (equivalent to the second block piece of the present application) having the same outer shape as the top block 1, for example, a rectangular flat shape (FIGS. 1 to 5, FIG. 8). The block piece 33 has a base plate 35 for installation on the lower surface (FIGS. 1 to 5), and an overlapping surface on the upper surface that can be overlapped with an intermediate block 60 described later.
In the block piece 33, a pair of parallel piston chambers 43 a and 43 b are formed in the structure using the plug member 31 as in the top block 1. A pair of pistons 45a and 45b (corresponding to the second piston of the present application) are accommodated in the piston chambers 43a and 43b, respectively, like the top block 1 so as to reciprocate. Also, using the plug member 31, press chambers 46a and 46b are formed on the end sides of the pistons 45a and 45b, respectively.

  The piston 45a has a pair of small-diameter step portions 44a and 44b on both sides of the center (axial direction). The piston 45b, like the pistons 15a and 15b of the top block 1, has a small-diameter stepped portion 47a at the central portion in the axial direction, and a pair of groove portions on both sides sandwiching the stepped portion 47a, for example, an annular groove 47b having a triangular cross section. have. A pair of discharge ports 49a and 49b that are opened and closed by a piston 45a are provided on the front surface of the block piece 33 (the surface on which the injection port 7 is formed). A pair of discharge ports 49c and 49d that are opened and closed by a piston 45b are provided on the rear surface of the opposite block piece 33 (the surface opposite to the injection port 7) (corresponding to the second discharge port of the present application: 2 for each second piston). More specifically, the discharge ports 49a and 49b communicate with the pair of stepped portions 44a and 44b alternately for each displacement of the piston 45a in the reciprocating direction, and the discharge ports 49c and 49d are displaced in the reciprocating direction of the piston 45b. Each is disposed at a position where it communicates with the annular grooves 47b on both sides alternately. The discharge ports 49a to 49d are all arranged so as to be aligned with the discharge ports 19a to 19d of the top block 1.

  A relay hole 53a (vertical hole) is opened at the same position as the relay hole 21a of the top block 1 on the upper surface portion of the block piece 33 facing the piston 45a, and positions on both sides of the relay hole 53a. A pair of relay holes 53b (vertical holes) are opened. The relay hole 53a communicates with the stepped portions 44a and 44b alternately for each displacement of the piston 45a in the forward / backward direction, and the relay hole 53b is provided for each displacement of the piston 45a in the forward / backward direction. It is arranged at a position to be opened and closed at the end of the piston 45a displaced to 46b.

  Further, in the upper surface portion of the block piece 33 facing the piston 45b, the relay holes 51a and the pair of relay holes 51b are arranged in the same arrangement as the relay holes 21a and the pair of relay holes 21a and 21b of the top block 1. It is open. The relay hole 51a is disposed at a position communicating with the stepped portion 47a regardless of the reciprocating direction of the piston 45b. The relay hole 51b alternates with the annular grooves 47b on both sides for each displacement of the piston 45b in the forward / backward direction. It is arranged at a position to communicate. Similar to the top block 1, the relay hole 51b includes two parallel through holes so as to alternately communicate with the stepped portions 47a.

  Inside the block piece 33, a pair of relay holes 57 having one end communicating with the pressing chambers 46a and 46b on both ends of the piston chamber 43b and the other end communicating with the central side of the piston chamber 43a are provided. . One end of the relay hole 57 communicates at a position that is opened and closed by the end of the piston 45b that goes into and out of the pressing chambers 46a and 46b every time the piston 45b moves in the reciprocating direction, and the other end is reciprocated by the piston 45a. It arrange | positions in the position which communicates with a pair of level | step-difference part 44a, 44b alternately for every displacement of a direction. From these various relay holes, the second lubricant passage Y which is the second fluid passage of the present application is configured. As with the top block 1, bolt insertion holes 28b are provided at the four corners of the block piece 33.

  The remaining intermediate block 60 is configured of a block piece 63 (corresponding to the third block piece of the present application) having the same outer shape as that of the top block 1, specifically, a rectangular flat shape (FIGS. 1 to 5 and 7). . The upper and lower surfaces of the block piece 3 are both formed as flat surfaces and are superposed surfaces that can be overlapped with the top block 1 and the base block 30. The block piece 63 has the same arrangement and the same structure as the top block 1, and includes a plug member 71, a pair of piston chambers 73a and 73b, and pistons 75a and 75b (including a stepped portion 77a and an annular groove 77b). (Equivalent to a piston), press chambers 76a, 76b and discharge ports 79a to 79d (corresponding to a third discharge port: two for each third piston) are provided (details are omitted). In order to output the piston displacement to the outside or to confirm the piston displacement, for example, an indicator rod 62 is provided at one end of the piston 75b. Incidentally, the end portion of the indicator rod 62 penetrates the plug member 71 and protrudes to the outside.

  In the upper surface of the block piece 63, a relay hole 83a (vertical hole) is opened at the same position as the relay hole 21a of the top block 1, as shown in FIGS. In addition, a pair of relay holes 83b (vertical holes) are opened at positions on both sides of the relay hole 83a. More specifically, the relay hole 83a is disposed at a position communicating with the stepped portion 77a regardless of the displacement of the piston 75a in the reciprocating direction, and the relay hole 83b is provided for each displacement of the piston 75a in the forward / backward direction. The pistons 75a and 76b are disposed at positions that are opened and closed at the end portions of the pistons 75a.

  Of the upper surface of the block piece 63, the upper surface portion facing the piston 75b is arranged in the same arrangement as the relay holes 21a and the pair of relay holes 21a and 21b of the top block 1 as shown in FIGS. A hole 81a and a pair of relay holes 81b are opened. The relay hole 81a is disposed at a position communicating with the stepped portion 77a regardless of the displacement of the piston 75b in the reciprocating direction, and the relay hole 81b is connected to the pair of annular grooves 77b for each displacement of the piston 75b in the reciprocating direction. It arrange | positions in the position which communicates alternately. Similar to the top block 1 and the base block 30, the relay hole 81b includes two parallel through holes so as to communicate with the stepped portion 77a.

  On the lower surface of the block piece 63, a relay hole 91a (vertical hole) is opened at the same position as the relay hole 53a of the base block 30, as shown in FIGS. 7, 11 and 12, on the lower surface portion facing the piston 75a. In addition, a pair of relay holes 91b (vertical holes) are opened at positions on both sides of the relay hole 91a. The relay hole 91a is disposed at a position communicating with the stepped portion 77a regardless of the displacement of the piston 75a in the reciprocating direction, and the relay hole 91b is annular on both sides for every displacement of the piston 75a in the forward / reverse direction. It arrange | positions in the position which communicates with the groove | channel 77b alternately. Like the top block 1 and the base block 30, the relay hole 91b includes two parallel through holes so as to communicate with the stepped portion 77a.

  In addition, the lower surface portion of the lower surface of the block piece 63 facing the piston 75b has relay holes 93a, 93a at the same positions as the relay holes 23a, 23b of the top block 1, as shown in FIGS. 93b (vertical hole) is opened. The relay hole 93a is disposed at a position where it communicates with the stepped portion 77a regardless of the displacement of the piston 75b in the reciprocating direction, and the relay hole 93b is formed on both annular grooves 77b at every displacement of the piston 75b in the reciprocating direction. And are arranged at positions that communicate with each other alternately. From these various relay holes, a third lubricant passage Z which is the third fluid passage of the present application is constituted.

Further, as shown in FIGS. 9 and 10, the gasket 2 serving as a seal portion disposed between the blocks 1, 60, 30 is, for example, a rectangular flat plate member 100 (corresponding to the substrate portion and the substrate of the present application). Each part is configured by coating an elastic member 101 such as rubber or plastic that forms an elastic seal part. Specifically, the gasket 2 is formed in the center portion of the flat plate member 100 in the elongated passage opening 103 extending in the direction of the injection port 7 (front-rear direction) and in the direction (left-right direction) orthogonal to the same direction around the passage opening 103. A plurality of extending passage openings, here, for example, two sets of left and right elongated passage openings 105 are provided.
The elastic member 101 is provided at the outer peripheral edge of the flat plate member 100, the opening edge of the passage openings 103 and 105, and the like, and seals between overlapping blocks (between the top block 1, the intermediate block 60, and the base block 30). Incidentally, bolt insertion holes 28 d are provided on the four corner sides of the flat plate member 100.

And in the elongate passage opening 103 arrange | positioned in the center of each gasket 2, the through-holes 9 and 9a and relay hole 21a, which are arrange | positioned in the center of each block 1,60 like each (alpha) 1 point in FIG. 23a, 51a, 53a, 81a, 83a, 91a, and 93a communicate with each other.
Further, four elongated passage openings 105 around the passage opening 103 form a passage communicating between adjacent blocks on both sides with the gasket 2 sandwiched between the α2 points in FIG. By this passage, the pistons arranged adjacent to each other in the thickness direction with the gasket 2 interposed therebetween communicate not two-dimensionally but two-dimensionally (FIG. 12). Specifically, a gap passage 106 (corresponding to the passage of the present application) is formed in the passage opening 105 between the blocks 1, 60, and 30, and the through hole extends in the thickness direction of the block via the gap passage 106. The formed relay holes 21b and 23b communicate with the relay holes 83b and 81b, or the relay holes 91b and 93b communicate with the relay holes 51b and 53b. That is, the pistons adjacent to each other with the gasket 2 interposed therebetween are communicated with each other in a two-dimensional direction passage (α2 point) extending in the left-right direction and the vertical direction.

  Various lubricant passages (including: passage openings 103 and 105 of the gasket 2) of these blocks 1, 60 and 30 are combined, and the top block 1 is stacked on the base block 30 with the intermediate block 60 interposed therebetween, or By simply stacking the top block 1 on the base block 30, a route (passage) is formed in the entire distribution valve in which the lubricant is pushed out in a fixed amount in order from each number of ports (number of discharge ports determined by the number of stacked blocks). (Set).

  In other words, when the blocks 1, 60 and 30 are overlapped, the distribution valve alternately switches the filling path in which the lubricant is alternately guided to the end side of each piston and the moving direction of each piston in turn by the pressure of the lubricant. A route that is combined with the switching path to be formed is formed. As a result, the pistons 15a, 15b, 45a, 45b, 75a, 75b are sequentially driven by the lubricant injected from the injection port 7 regardless of the number of blocks stacked, and the pistons are further slid. In accordance with the displacement, the lubricant is distributed in order from the respective discharge ports 19a to 79d.

  Incidentally, as with the top block 1 and the base block 30, bolt insertion holes 28 c are provided at the four corners of the block piece 63. Accordingly, the fastening member, for example, the bolt member 110 is inserted into the bolt insertion holes 28 a to 28 c of the base block 30, the intermediate block 60, and the top block 1, and the screw holes 115 formed in the base plate 35 (FIG. 5). The blocks 1, 60 and 30 are fastened to each other, and any number of distribution valves can be assembled with the same structure.

With reference to the developed view of FIG. 12, the operation of the 12-port distributing valve assembled in this way will be described.
Now, a lubricant supply pump (not shown) is connected to the inlet 7, each outlet is connected to various lubricated parts (not shown) such as bearings, and lubricant (grease, etc.) is discharged by operating the lubricant supply pump. . Then, the lubricant from the pump passes through the check holes 5a and first passes through the through holes 9 and 9a and the passage openings 103 of the gaskets 2 in the respective stages as shown in FIG. Through the stepped portion, each piston 15a, 15b, 45a, 45b, 75a, 75b is guided to one side of each pressing chamber, and one of the pressing chambers, for example, as shown by a point group in FIG. The pressing chamber 16b, the pressing chamber 76a of the piston 75a, the pressing chamber 76b of the piston 45b, and the pressing chamber 16a of the piston 15b are sequentially pressed by the lubricant.

  Then, when the injected lubricant loses its initial destination, this time, as shown by the point cloud in FIG. 12, the stepped portion 77a of the piston 75a, the relay hole 91b, the gap passage 106, and the relay hole 53b, the piston 45a The pressure chamber 46b is entered and the piston 45a is displaced as indicated by the arrow a in FIG. Then, the lubricant in the pressing chamber 46a is pushed out. The amount of lubricant corresponding to the sliding displacement of the piston 45a is discharged from the discharge hole 79c through the relay hole 53b, the gap passage 106, the relay hole 91b, and the annular groove 77b of the piston 75a (quantitative). Subsequently, by switching the flow path due to the displacement of the piston 45a, the lubricant enters the pressing chamber 46b of the piston 45b through the open relay hole 57, and the piston 45b is displaced to the opposite side as indicated by the arrow b in FIG. The lubricant in the pressing chamber 46a is discharged from the discharge hole 49c through the relay hole 57 and the small diameter portion 44a (quantitative).

  Subsequently, by switching the flow path due to the displacement of the piston 45b, a path toward the pressing chamber 76a of the piston 75b is formed, and the lubricant enters the pressing chamber 76a of the piston 75b. Then, the piston 75b is displaced to the opposite side as indicated by the arrow c in FIG. 12, and the lubricant in the pressing chamber 76b is discharged from the discharge hole 49b through the relay hole 93b, the gap passage 106, the relay hole 51b, and the annular groove 47b. (Quantitative).

Similarly, by switching the flow path, the pistons 15b, 15a, and 75a are displaced in the order shown by arrows df in FIG. 12, and the lubricant is sequentially discharged from the remaining discharge holes 79a, 19d, 19a, and 79d. (Quantitative). The sliding displacement (switching) of each of the pistons 15a, 15b, 45a, 45b, 75a, 75b is sequentially repeated every time the lubricant is discharged, and a fixed amount of lubricant corresponding to the displacement of the piston is It is sent out from the discharge port to various lubricated parts.
That is, the lubricant is distributed from each of the twelve outlets to a twelve place where lubrication is required.

  In such a distribution valve that distributes the lubricant to a plurality (12 locations), a route suitable for the number of distribution ports is appropriately formed each time the top block 1, the intermediate block 60, and the base block 30 are overlapped. In other words, by dividing the number of stages of the intermediate block 60 according to the required number of discharge ports by the split type distribution valve, it is possible to obtain a distribution valve having the number of discharge ports satisfying the request.

  Therefore, for example, when there are 16 distribution locations, as shown in FIG. 13, the intermediate block 60 interposed between the top block 1 and the base block 30 is arranged in two stages to reduce the number of discharge ports (number of distribution ports). You only need to use 16 mouthpieces. Of course, when more than that number is required, the intermediate block 60 may be more than that (three steps or more). Further, for example, when there are eight distribution points, the number of discharge ports (number of distribution ports) may be eight with only the top block 1 and the base block 30 as shown in FIG.

  Therefore, the distribution valve increases or decreases the quantity of the intermediate block 60 interposed between the top block 1 having the inlet 7 and the base block 30 according to the required quantity of the distribution points. Therefore, it is possible to easily obtain a distribution valve having a discharge port corresponding to the required distribution quantity of lubricant with a single distribution valve product.

  As a result, even a large number of distribution points can be handled with a single distribution valve (product), and even if there are many locations where lubricant is distributed, no additional metal fittings, piping members, or distribution valves are required. Compared with a product distribution valve, the cost can be significantly reduced. In particular, the frequently used intermediate block 60 is set to a common route and has a common structure (commonization), so that the cost burden can be reduced.

  In addition, the installation space for installing the distribution valve can be reduced as compared with the case of using a plurality of distribution valves, and the piping connected to the distribution valve is simplified. In addition, a passage portion for short-circuit communication between adjacent pistons 15a and 75a, between pistons 75a and 45a, between pistons 45b and 75ba, and between pistons 75b and 15b has passage openings 103 and 105 in the seal portion (gasket 2). Since it has been realized with a two-dimensional passage such as providing or forming various relay holes (vertical holes) on the end face of the block, troublesome three-dimensional processing becomes unnecessary, and the first to third lubricant passages X to Z are provided. It can be formed easily and inexpensively.

Since the distribution valve is divided, the intermediate block 60 is not a piston having the same piston diameter as the other blocks, but an intermediate block having a piston with a different diameter is prepared. It can also be interposed between the block 1 and the base block 30. In this way, it is possible to increase or decrease the discharge amount from some of the outlets of the distribution valve, and to increase or decrease the amount of lubricant only at some lubricated parts. It is possible to easily meet special requirements such as when you want to make it happen.
In addition, since the split-type distribution valve is fastened using the bolt member 110, it is possible to easily assemble various distribution valves with different numbers of discharge ports with a simple structure.

In particular, passage openings 103 and 105 are provided in a flat plate member 100 serving as a substrate portion in a seal portion that seals between the blocks 1, 30, and 60, and an outer peripheral edge portion of the flat plate member 100 and an opening edge of the passage openings 103 and 105 are provided. By using the structure in which the elastic member 101 (elastic sealing material) is provided in the part, the gap passage 106 (passage portion) is sealed under high surface pressure, and the lubricant leaks between the blocks 1, 30, 60. A passage portion without fear can be secured. As a result, the lubricant can always be distributed satisfactorily no matter what pressure the lubricant is distributed.
The gasket 2 generally used has such a structure, that is, a through hole opening 103 and a passage opening 105 are provided in the flat plate member 100 serving as a substrate, and an elastic member is provided at the outer peripheral edge portion of the flat plate member 100 and the opening edge portions of the passage openings 103 and 105. If the structure which provides 101 (elastic sealing material) is employ | adopted, only by arrange | positioning the gasket 2 between the to-be-sealed members which should be sealed, the channel | path sealed under high surface pressure can be easily formed in the same.

  In addition, each structure in each embodiment, its combination, etc. are examples, and addition, omission, replacement, and other changes of the structure are possible without departing from the spirit of the present invention. Moreover, it is not limited by embodiment of this invention, and it cannot be overemphasized that it is limited only by "a claim." For example, in one embodiment, a structure in which two pistons are arranged in parallel for each block piece is described. However, the present invention is not limited to this, and a structure in which three pistons or more pistons are arranged in parallel may be used. The number of discharge ports is not limited to two per piston, and a larger number may be used. Of course, the fluid to be dispensed is not a lubricant, but may be another fluid. In one embodiment, an example in which the seal portion is formed from a separate part such as a gasket has been described. However, the seal portion may be formed integrally with a block piece. Further, the elastic member (elastic sealing material) of the gasket may coat not only the outer peripheral edge of the flat plate member and the opening edge of the passage opening, but also the entire side surface of the flat plate member, for example.

1 Top block (first block)
2 Gasket (seal part)
3 1st block piece 7 Inlet 15a, 15b 1st piston 19a-19d 1st discharge port 30 Base block (2nd block part)
33 2nd block piece 45a, 45b 2nd piston 49a-49d 2nd discharge port 60 Intermediate block (3rd block part)
63 3rd block piece 75a, 75b 3rd piston 79a-79d 3rd discharge port 100 Flat plate member (board | substrate part, board | substrate)
101 Elastic member (elastic seal part, elastic seal material)
103, 105 passage opening X first lubricant passage (first fluid passage)
Y Second lubricant path (second fluid path)
Z third lubricant path (third fluid path)

Claims (5)

An inlet for injecting fluid into the first block piece, a plurality of first reciprocating first pistons, a first outlet for each first piston, and a first fluid path through which fluid from the inlet circulates. A first block part provided with
A second block that can be stacked with the first block portion, a plurality of reciprocating second pistons, a second discharge port for each second piston, and a second fluid path through which fluid from the inlet circulates. A second block portion provided with
A selectable third block part, which is stacked between the first block part and the second block part, in accordance with a required number of ejection ports;
The third block portion includes a third block piece that can be stacked with the first block portion and the second block portion, a plurality of reciprocable third pistons, and a third discharge port for each third piston, A third fluid path through which fluid from the inlet circulates,
When the first fluid path, the second fluid path, and the third fluid path overlap the first block part, the number of third block parts selected according to demand, and the second block part, The first to third pistons are sequentially driven by the fluid injected from the inlet, and the fluid is distributed from the first to third discharge ports according to the sliding displacement of the first to third pistons. dispensing valve which, characterized in that it is set as a path for feeding in.   2. The distribution valve according to claim 1, wherein the first to third block portions are fastened to each other by fastening members from the overlapping direction. Between the block portions of the first to third block portions that overlap, each has a seal portion,
Of the first to third fluid passages, passage portions communicating between the pistons through the block portions are respectively formed in a passage formed in the seal portion and each block piece sandwiching the passage, and the passage The distribution valve according to claim 1, further comprising a through-hole communicating between the pistons via a pipe.   The seal portion is provided at a substrate portion disposed between the first to third block portions, a passage opening formed in the substrate portion, an outer peripheral edge portion of the substrate portion, and an edge portion of the passage opening, respectively. The distribution valve according to claim 3, further comprising an elastic seal portion. A substrate disposed between sealed members to be sealed;
A passage opening formed in the substrate;
An elastic sealing material provided on each of the outer peripheral edge of the substrate and the edge of the passage opening.

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