JP2012145587A - Lubrication device in dispenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently secure a space which is used as a grease pool of grease to be supplied to a slide surface between pistons and cylinders when 1536 pistons are aligned and equipped in a dispensing head of a dispenser by being associated with use of plates of 1536 wells, and to certainly perform piston sealing between the pistons and the cylinders.SOLUTION: An upper end side is connected to a lower end side of each cylinder of cylinders to be provided to a cylinder head, a recessed groove w for engaging an O ring is formed like a vertical cylinder which surrounds a part in an axial direction of peripheral surfaces of pistons which are engaged into the recessed groove at an entrance part on the upper end side of each nozzle chip to be assembled into the cylinder head, an O ring R at an upper part and an O ring R at a lower part whose inner peripheral surfaces closely contact outer peripheral surfaces of the pistons are inserted to the upper end side and the lower end side in the recessed groove w, a collar Y whose inner diameter is made like a cylinder with a diameter larger than outer diameters of the pistons is inserted at an intermediate part at upper part and a lower part in the recessed groove w between the O rings R, R, and the grease is filled by using a space to be formed between the inner peripheral surface of the collar Y and the outer peripheral surfaces of the pistons as a grease pool.

Description

The present invention is a clinical examination in which a large number of specimens / reagents are aspirated and dispensed at once by a large number of aligned pistons and a large number of cylinders into which they are slidably inserted. In a dispensing machine used for medical examinations, it is possible to smoothly slide a large number of pistons aligned and assembled to the dispensing head and a large number of cylinders provided in the cylinder head so that the pistons are fitted. The present invention relates to a lubrication device.

  As shown in FIG. 1, the suction dispensing head device in a dispensing machine used in the field of clinical examinations and medical examinations is usually equipped with a dispensing head unit B on the front side of the main body A, up and down, left and right, and front and rear. It is mounted so as to be movable in three directions, and a dispensing head a is mounted on the body of the dispensing head unit B.

  As shown in FIG. 1, the dispensing head a is perpendicular to the piston drive plate 1 that moves up and down with respect to the dispense head unit B and to the lower surface side of the piston drive plate 1 as shown in FIGS. 2 and 3. A plurality of pistons 2 provided so as to hang down and be aligned in the front-rear and left-right directions, and a plurality of cylinders 4 in which the plurality of pistons 2 are slidably fitted are provided below the piston drive plate 1. A cylinder head 3 that is arranged in a fixed state with respect to the body of the dispensing head unit B, and a tip nozzle 5 that is connected to the lower end side of each of the cylinders 4 and is assembled and held in the cylinder head 3; The tip 6 inserted into the tip end side of the tip nozzle 5 is arranged below the cylinder head 3 so as to be removed when one suction / dispensing operation is completed, and the suspension rod 8 moves the cylinder 6 to the cylinder. To de 3 vertical movement of predetermined distance is constituted by a chip removal plate 7 to 支架 hanging as permitted.

  As a result, when performing the suction dispensing operation, as shown in the explanatory diagrams of FIGS. 4 to 9, first, the dispensing head a with the tip 6 attached to the tip of the tip nozzle 5 is dispensed. Positioned above the tray C containing the sample / reagent set in the machine main body A, in this state, the piston drive plate 1 is moved downward, and the lower half side of the piston 2 is connected to the lower half side of the cylinder 4 The tip nozzle 5 is rushed into the tip nozzle 5 to expel the air in the tip nozzle 5.

  Next, in this state, the dispensing head a is lowered, and the tip of the chip 6 is brought into contact with the sample or reagent in the tray C as shown in FIG.

  Next, the piston drive plate 1 is lifted from this state as shown in FIG. 6 to lift the piston 2 out of the inner cavity of the tip nozzle 5, and the specimen, reagent, etc. are sucked into the tip 6 by the suction pressure.

  Next, the dispensing head a is raised, and the tip 6 that has sucked the sample / reagent is pulled up above the tray C as shown in FIG. Next, in this state, the dispensing head a is moved to an upper position of the plate D on which the specimen / reagent is dispensed.

  Next, at this moved position, the piston drive plate 1 is lowered, the piston 2 is pushed into the chip nozzle 5, and the sample / reagent sucked into the chip 6 is discharged into the well of the plate D. Note.

  Next, the dispensing head a is raised and moved to a position where the tip 6 is collected. By moving to this position, the tip removal plate 7 that has been locked at the position where it abuts the lower surface of the cylinder head 3 is released from the locking, so that it lowers to the lower end of the suspension rod 8, and the tip is lowered by the lowering operation. The tip 6 that has been inserted into the nozzle 5 is squeezed off and dropped.

  Then, when aspirating / dispensing the next specimen / reagent or the like, a new tip 6 is inserted and attached to the tip of the tip nozzle 5, and aspirating / dispensing is performed by the same process as described above.

  The tip 6 is replaced every time the suction / dispensing operation is performed in order to prevent contamination of a specimen to be examined. If there is no problem with contamination, FIGS. As shown in FIG. 15, a sample nozzle, a reagent, and the like are aspirated and dispensed by a tip nozzle 5 that is connected to and mounted on the cylinder 4 of the cylinder head 3.

  In this case, after the completion of one suction / dispensing operation, the dispensing head a is moved above the washing tank E as shown in FIG. The suction / discharge operation by the operation of 2 is performed to perform cleaning, and the next suction / dispensing is performed.

  When the suction / dispensing operation is directly performed by the tip nozzle 5, the tip detaching plate 7 that is suspended from the lower surface side of the cylinder head 3 is not required to remove the tip 6. Omitted. Further, the tip nozzle 5 fitted to the lower half side of the cylinder 4 of the cylinder head 3 is detachably attached to the cylinder head 3.

  Thus, the suction / dispensing head device of the dispenser is configured, functions and operates, and the piston 2 which is installed in the dispensing head a while being aligned vertically and horizontally, and the cylinder 4 fitted thereto. The number of samples / reagents corresponding to the number of samples can be performed at one time.

  By the way, the number and the number of pistons 2 and cylinders 4 installed in the dispensing head a of this suction dispensing device are the number corresponding to the number of wells formed in alignment with the plate D.

  The plate D has a standard size (85.5 mm in length and 127.8 mm in width). As shown in FIGS. 16 and 17, the plate D has a total of 8 vertically and 12 horizontally aligned. The mainstream is one with 96 wells b, or one with a total of 384 wells b aligned vertically and 24 horizontally as shown in FIGS. Has been.

  Therefore, in the suction dispensing apparatus using the 96-well plate D, 96 cylinders of 8 × 12 are formed at predetermined pitch intervals in the cylinder head 3 of the dispensing head a. The 96 pistons 2 corresponding to the cylinders 4 are assembled on the lower surface side of the piston drive plate 1.

  As shown in FIG. 20, the piston 2 is assembled to the piston drive plate 1 with a through hole 11 through which the upper end portion of the piston 2 passes through the piston fixing plate 10 assembled on the lower surface side of the piston drive plate 1. An annular fitting which is opened at a predetermined position for assembling each piston 2 and is inserted into the through hole 11 and formed at the upper end protruding from the upper surface side of the piston fixing plate 10. This is done by fitting the E-ring 22 or the C-ring into the mating groove 21 or by forming a male screw at the upper end protruding from the upper surface side of the piston fixing plate 10 and screwing the nut into this for fastening It is done by doing.

  Further, as shown in FIG. 21, the lubricating means at the fitting portion between the piston 2 and the cylinder 4 is formed with a fitting depression w at the inlet portion of the cylinder 4 as shown in FIG. An O-ring R or X-ring R ′ that fits closely to the surface is fitted, grease is applied to the peripheral surface thereof, and the peripheral surface of the O-ring R or X-ring R ′ and the peripheral surface of the piston 2 The space formed between the piston 2 and the cylinder 4 is filled with grease, so that grease in the grease reservoir is sequentially supplied to the sliding surface between the piston 2 and the cylinder 4 to improve the lubrication of the piston 2 with respect to the cylinder 4. , Reduce wear and make the load uniform.

  By the way, in the field of clinical testing and medical testing, as the performance of computers improves, the amount of specimens and test reagents used for measurement is becoming increasingly smaller, the measurement time is shortened, rationalization of testing and the processing of large quantities of samples are required. As a result, a plate with 16 × 24 384 wells is often used as the number of treatments that can be performed on one plate, and the number of wells is increased to 32 × 48. A 1536-well plate has also begun to appear.

  As shown in FIGS. 22 and 23, this 1536-well plate D has 1536 square-wells on the upper surface of the standard dimension plate D having a width of 127.8 mm and a length of 85.5 mm. The vertical and horizontal pitches are 2.25 mm, and they are formed by aligning 48 horizontally and 32 vertically.

  The dispenser that performs the inspection process using the 1536 well plate has an independent piston 2 and cylinder 4 at positions corresponding to the wells b provided on the plate D on the dispensing head a. Since the piston 2 has to be arranged and installed, the piston 2 is formed into a rod shape with an extremely small diameter of φ0.7, and this is formed into a pitch (2.25 m / m) between plate holes (wells). Assemble vertically and horizontally at a pitch corresponding to.

  Therefore, as a lubrication means, the X ring R ′ or O ring R fitted to the inlet portion of the cylinder 4 is inserted into a very small diameter piston rod of φ0.7 and the pole between the adjacent pistons. Due to the narrow pitch dimension (2.25 m / m), it is formed in a very small size, so that the piston seal cannot be made sufficiently, and the space for the grease reservoir for lubrication becomes small and slightly Only an amount of grease can be retained.

  This grease, which lubricates the sliding surface between the piston and cylinder, is used above the cylinder with the grease attached to the peripheral surface of the dispenser during the suction operation that sucks and holds the sample. Because it is easy to evaporate and solidify by being exposed to the outside air by being pulled up to a sufficient amount, sufficient lubrication can be obtained only for a short period of time with a very small amount, causing a malfunction in the piston immediately. The problem that comes out comes out.

  The problem to be solved by the present invention is that when the 1536 pistons are aligned and installed in the dispensing head of the dispenser in correspondence with the use of the 1536 well plate, the piston and the cylinder It is an object of the present invention to provide a lubricating means that can secure a sufficient space for a grease reservoir for grease to be supplied to the sliding surface and that can surely perform a piston seal between the piston and the cylinder.

As means for solving the above-described problems, in the present invention,
A number of pistons 2 are aligned and assembled on the lower surface side of the piston drive plate 1 of the dispensing head, and a number of cylinders 4 are fitted into the cylinder head 3 so that each of the number of pistons 2 is slidably fitted. Are connected to the lower end side of each cylinder 4 provided in the cylinder head 3 at the upper end side of the tip nozzle 5 mounted on the tip nozzle fixing plate 50 assembled below the cylinder head 3; The lower end side of the piston 2 which is inserted into the cylinder 4 so as to be movable up and down is slidably inserted into the tip nozzle 5, and an O-ring is inserted into the inlet portion on the upper end side of the tip nozzle 5. Is formed in a vertically long cylindrical shape surrounding a partial region of the peripheral surface of the piston 2 along the axial direction, and the outer diameter is at the upper end side and the lower end side in the recess w. Diameter that fits in the recess w The upper O-ring R and the lower O-ring R that are made and the inner peripheral surface is closely fitted to the outer peripheral surface of the piston 2 are respectively inserted and placed opposite to each other. A collar Y formed in a cylindrical shape having an inner diameter larger than the outer diameter of the piston 2 in a space portion in the recess w formed in the interval facing the O-ring R of the upper and lower ends is an upper O. The ring R and the lower O-ring R are inserted and brought into contact with each other, and a space in the recess w formed between the inner peripheral surface of the collar Y and the outer peripheral surface of the piston 2 is formed in the grease reservoir, The present invention proposes a lubricating device in a dispenser characterized in that the space is filled with grease.

  In the dispenser according to the present invention, the piston / cylinder lubrication device has an O-ring insertion recessed groove for fitting two O-rings at the lower end side of each cylinder provided in the cylinder head. It is formed in the inlet part on the upper end side of the nozzle tip that is connected and assembled to the cylinder head, and the upper O-ring and the lower O-ring that are inserted and inserted into the concave groove of the piston. The space around the collar in the groove is held in a position where it is inserted between the upper and lower O-rings and is inserted between the upper and lower O-rings and the lower surface of the cylinder head. The grease reservoir formed by the cylinder is held in a sealed state by the lower surface of the cylinder head that closes the opening on the upper surface side of the concave groove, so that the piston seal is good and a grease reservoir that prevents leakage of grease can be secured. Becomes way, also, the maintenance of such desorption or exchange of the O-ring can be easily performed by detaching the nozzle tip from the cylinder head.

It is a perspective view of the outline of the whole dispenser. It is a perspective view in the middle of the assembly of the dispensing head of a dispensing machine. It is an enlarged vertical sectional view of a part of the same dispensing head. It is explanatory drawing of the state which has located the dispensing head above the tray which accommodates a sample, a reagent, etc. It is explanatory drawing of the state which lowered the dispensing head and made the chip contact the sample etc. in a tray. It is explanatory drawing of the state which raises the piston drive plate of a dispensing head and is performing the suction action. It is explanatory drawing of the state which finished the suction action and raised the dispensing head. When the dispensing head in the same state as above is moved above the plate and the dispensing head is lowered at that position, the tip faces the well of the plate and the sample is dispensed into the well by lowering the piston drive plate It is explanatory drawing of. It is explanatory drawing of the state which moved the dispensing head which finished dispensing to the chip | tip collection | recovery position, and has removed the chip | tip by raising the dispensing head. It is explanatory drawing of the state which has located the dispensing head on the tray which accommodates a sample etc. for the attraction | suction operation | movement in the case of performing suction / dispensing of a sample etc. directly with a chip nozzle, without using a chip | tip. It is explanatory drawing of the state which lowered | hung the dispensing head same as the above and made the front-end | tip of a tip nozzle contact the sample etc. in a tray. It is explanatory drawing of the state which is attracting | sucking a sample etc. by the raise of the piston drive plate of a dispensing head same as the above. It is explanatory drawing of the state which raised the dispensing head which finished suction operation, such as a sample. Move the dispensing head pulled up to the top of the plate, the tip of the tip nozzle faces the well of the plate by the lowering operation, and the piston is lowered by the lowering operation of the piston drive plate to distribute the sample etc. to the well of the plate It is explanatory drawing of the state which has poured. The dispensing head that has finished dispensing the sample is moved to the upper position of the cleaning tank, and the piston drive plate is lifted and lowered at that position to suck and discharge the cleaning liquid in the cleaning tank. It is explanatory drawing of the state which is wash | cleaning. It is a top view of a 96 well plate used for dispensing of a sample or the like. It is a front view of a plate same as the above. It is a top view of the plate which made 384 wells. It is a front view of a plate same as the above. It is a longitudinal cross-sectional view of the fixing means which assembles and fixes a piston to the piston drive plate of a dispensing head. It is a longitudinal cross-sectional view of the lubrication means in the fitting site | part of the piston and cylinder provided in the entrance site | part of a cylinder. It is a top view of a 1536 well plate. It is a front view of a plate same as the above. It is a disassembled perspective view in the process of assembling of the dispensing head which implements this invention. It is a partial longitudinal cross-sectional view of a dispensing head same as the above. It is an expanded vertical sectional view of the principal part same as the above. It is a vertical front view of a part of 2nd Example of this invention. It is an expanded vertical sectional view of the principal part of an Example same as the above.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 24 is an exploded perspective view of the dispensing head a of the dispensing machine in which the present invention is assembled, FIG. 25 is a longitudinal sectional view of a part of the dispensing head a, and FIG. 26 is a piston seal of the dispensing head. In these drawings, 1 is a piston driving plate, 1a is a piston fixing sheet to be assembled to the lower surface side of the piston driving plate 1, 1b is holding the piston fixing sheet 1a from below, and the piston driving plate 1 2 is a piston, 3 is a cylinder head (head base), 4 is a cylinder provided on the head base 3, 5 is a tip nozzle provided below the cylinder 4 and connected to the cylinder 4, 50 Is a tip nozzle fixing plate assembled on the lower surface of the head base 3, 6 is a tip, and 7 is suspended below the tip nozzle fixing plate 50 via a hanging rod 8. -Up removal plate, W is shown a lubricating system for ensuring sealing property and lubricity between the piston and the cylinder.

  The piston drive plate 1 is held by a clamp 90 that is moved up and down by a screw jack 9 mounted on the body of the dispensing head unit B, as shown in the overall schematic diagram of FIG. By moving up and down by the operation of the jack 9, the body of the dispensing head unit B is moved up and down, thereby functioning to simultaneously lift and lower a plurality of pistons 2 suspended from the lower surface side of the piston drive plate 1. .

  The head base 3 is assembled and mounted on the dispensing head unit B in such a state that the flange portions 30 provided on both the left and right sides of the head base 3 are fitted in the engaging grooves provided on the inner surface side of the body of the dispensing head unit B. However, when the entire dispensing head unit B moves in three directions, front, back, left, right, up and down, with respect to the main body A, it moves together, but the piston drive plate 1 is moved up and down by the operation of the screw jack 9 When the piston 2 is lifted and lowered by the lifting and lowering operation of the piston drive plate 1, the piston 2 is provided on the head base 3. In step 4, suction and discharge are performed.

  As shown in FIG. 24, the chip nozzle fixing plate 50 provided on the lower surface side of the head base 3 is provided when the chip nozzle 5 is continuously mounted below the cylinder 4 established in the head base 3. 5 is for assembling the tip nozzle 5 while supporting the upper end portion 5a of the head 5, and is assembled to the lower surface of the head base 3 by a fixing screw 51.

  The tip removal plate 7 below the tip nozzle fixing plate 50 is provided with the tip 6 attached to the tip of the tip nozzle 5 protruding downward from the tip nozzle fixing plate 50 as shown in FIG. When the suction / dispensing operation is completed, the tip is removed for replacement with a new tip. This removal operation is performed by moving the dispensing head a after one dispensing operation is completed. The tip nozzle fixing plate 50 is fixed to the lower end of the suspension rod 8 by releasing the tip nozzle fixing plate 50 from the locking member (not shown) that has been held in a position in contact with the lower surface of the tip nozzle fixing plate 50. This is done by pushing down the chip 6 fitted to the lower end side of the chip nozzle 5 by the operation of lowering the plate 50.

  The above-described piston fixing sheet 1a is formed into a plate shape by an elastic material such as rubber and synthetic resin having flexibility and restoring force. The piston fixing sheet 1a has a small-diameter opening k that is vertically permeable, and its inner diameter is slightly smaller than the outer diameter of the head 20 on the upper end side of the φ0.7 piston 2 for 1536 wells. As dimensions, the pitch is 2.25 mm, and 32 are arranged in the vertical direction and 48 are arranged in the horizontal direction.

  h is a hole formed in the seat case 1b, and is vertically permeable as an inner diameter corresponding to the outer diameter of the piston 2 at a position where it overlaps with each of the numerous openings k opened in the piston fixing sheet 1a. It is shaped to do.

  Assembling and fixing the upper end of the piston 2 with respect to the piston drive plate 1 is performed on the piston fixing sheet 1a formed of an elastic material with respect to the opening k having an inner diameter somewhat smaller than the outer diameter of the piston 2. This is done by press-fitting and fitting the end of the.

  24 and 25, a hole indicated by a symbol m is a maintenance hole for maintenance provided in the piston drive plate 1 and fixed to the piston mounted on the lower surface side of the piston drive plate 1 of the suction dispensing head a. The piston drive plate 1 is provided so as to be vertically permeable at each upper position of the 1536 recesses w opened in the seat 1a. As a result, when the assembled piston 2 is removed for maintenance, a tool is inserted and pushed into the maintenance hole m, so that the piston 2 is dropped downward and can be removed.

  Thus, in this example, the upper end side of the tip nozzle 5 is connected to the lower end side of the cylinder 4 provided in the cylinder head 3, and this is connected to the cylinder head 3 by the tip nozzle fixing plate 50 assembled integrally with the cylinder head 3. The piston 2 is slidably inserted into the inner cavity thereof, and the suction operation and the discharge operation are performed by inserting and extracting the piston 2 with respect to the tip nozzle 5. The sample or the like is sucked and dispensed into the tip 6 attached to the lower end of the tip 5, and the tip nozzle 5 constitutes a cylinder that performs suction and discharge operations by fitting with the piston 2, The cylinder 4 established in the cylinder head 3 is an example in which the cylinder 4 serves as a guide hole for guiding the lifting / lowering operation of the piston 2.

  Therefore, the lubricating device W for ensuring the piston sealing property and lubricity of the fitting surface between the piston 2 and the cylinder is provided at the upper end portion of the tip nozzle 5 constituting the cylinder that is slidably fitted with the piston 2. It is installed to incorporate.

  That is, as shown in FIG. 26, a recess w for inserting an O-ring is formed in a vertical cylindrical shape at the upper end 5a of the tip nozzle 5 constituting the cylinder, and the upper end side is formed in the recess w. An O-ring R whose inner peripheral surface is in intimate contact with the outer peripheral surface of the piston 2 is fitted to each of the lower end side and the lower end side, and an inner diameter is set between the upper and lower O-rings R · R. A collar Y made of an elastic material having a larger diameter is inserted, and the gap between the inner peripheral surface of the collar Y and the outer peripheral surface of the piston 2 is filled with grease as a grease reservoir. .

  When the tip nozzle 5 is fixedly attached to the cylinder head 3 by connecting the tip nozzle fixing plate 50 integrally to the lower surface side of the cylinder head 3 and connecting the upper end portion 5a of the tip nozzle 5 serving as the inlet portion of the cylinder. In addition, since the tip nozzle 5 is formed in the enlarged diameter portion in order to ensure the mounting, the recess w can be formed without any trouble even if the piston 2 has a small diameter.

  The recess w is coated with grease around the collar Y made of an elastic material, and the tip nozzle 5 is fixedly attached to the cylinder head 3 in a state where the O-rings R and R are inserted vertically. By integrally connecting the tip nozzle fixing plate 50 to the cylinder head 3 with the fixing screw 51, the opening on the upper surface side of the recess w is closed by the lower surface side of the cylinder head 3, and is mounted in the recess w. The upper and lower O-rings R and R, the collar Y and the grease that have entered are kept sealed.

  27 and 28 show another embodiment. In this example, the collar Y inserted between the upper and lower O-rings in the first embodiment is replaced with a spring S in which a steel wire is wound in a coil shape. Further, in this example, the piston 2 is only fitted to the cylinder 4 established in the cylinder head 3 and is connected to the lower end side of the cylinder 4 in the tip nozzle 5 provided in the piston 2. It is the example implemented to the dispenser of the form comprised so that may not be inserted.

  FIG. 27 is a longitudinal front view of a portion on the right end side of the dispensing head a, and FIG. 28 is an enlarged longitudinal front view of a portion of the same portion. In these drawings, 1 is a piston drive plate, 2 Is a plurality of pistons assembled on the lower surface side of the piston drive plate 1 by a piston fixing sheet 1a, 3 is a cylinder head, 4 is a cylinder opened on the cylinder head 3 so as to be fitted with each of the plurality of pistons 2, Reference numeral 5 denotes a tip nozzle, 6 denotes a tip, 7 denotes a tip removal plate, and W denotes a lubricating device incorporated in the dispensing head a.

  The piston drive plate 1 has the same configuration as the piston drive plate in the first embodiment.

  Each of the multiple pistons 2 has a small diameter of φ0.7 m / m, and the upper ends of the pistons 2 are inserted into 1536 openings k that are arranged vertically and horizontally on the piston fixing sheet 1a. The upper end 20 projecting upward from the fixed sheet 1a is fixed to the piston fixed sheet 1a by fitting the E ring 22, and the piston fixed sheet 1a is assembled to the piston drive plate 1 so that the lower surface side of the piston drive plate 1 It is provided by being aligned vertically and horizontally, and the number thereof is 1536. The piston 2 is fixed to the piston fixing sheet 1a by forming the piston fixing sheet 1a with an elastic material like the piston fixing means of the first embodiment, and the opening k is smaller in diameter than the outer diameter of the piston 2. In some cases, the upper end of the piston 2 is press-fitted into the opening k to be fixed by caulking.

  The piston 2 is formed in such a length that the lower end is positioned at the lower end portion of the cylinder 4 when the piston 2 is inserted deeply into the cylinder by the lowering operation of the piston drive plate 1 with respect to the cylinder head 3.

  The cylinder head 3 has 1536 cylinders 4 fitted to the pistons 2 at positions corresponding to the multiple (1536) pistons 2 aligned and assembled on the lower surface side of the piston drive plate 1. , Aligned vertically and horizontally.

  The tip nozzle 5 is formed with a small outer diameter on the upper end side, and the upper end side of the small diameter is fitted in a through hole formed so as to extend the cylinder 4 on the lower half side of the cylinder head 3. By inserting, the tip 6 is assembled to the cylinder head 3 so that the upper end is connected to the lower end of the cylinder 4, and the tip 6 is removably inserted into the lower end hanging below the cylinder head 3.

  The tip removal plate 7 is suspended from the dispensing head a so as to be able to move up and down relative to the cylinder head 3 and occupies a raised position when the suction / dispensing operation is performed. It acts to descend and push the chip 6 downward, and has the same configuration as the chip removal plate 7 of the first embodiment.

  The lubrication device W includes a vertical cylindrical recess w formed at the inlet portion of the cylinder 4, two O-rings R and R that are inserted into the lower and upper portions of the recess w, and In a space between the spring S formed in a coil shape with a steel wire placed between the two O-rings R · R and inserted into the recess w, and the upper and lower O-rings R · R, It is comprised with the grease with which the space | gap formed around the coil-shaped spring S is filled.

  Then, the upper and lower O-rings R and R, the coiled spring S and the grease inserted in the recess w are recessed by the pressing plate 32 assembled to the upper surface of the cylinder head 3 by the fixing screw 31. When the opening on the upper surface of w is covered, it is held in a state of being inserted into the recess w.

  When the O-ring R / R, coiled spring S grease or the like is inserted into the recess w, the coiled spring S is inserted with its axial spring force compressed and contracted. When the opening above the recess w is closed by the pressing plate 32, it is effective to allow the upper and lower O-rings R · R to exert a spring force in the direction of expanding the distance therebetween. .

A Body B Dispensing head unit C Tray D Plate E Cleaning tank R O ring R'X ring S Spring W Lubricator Y Color a Dispensing head b Well h Hole k Open m Maintenance hole w Recessed concave 1 Piston drive plate 1a Piston Fixed sheet 1b Seat case 10 Piston fixing plate 11 Through hole 2 Piston 21 Fitting groove 22 E ring 3 Cylinder head (head base)
30 Clamping portion 31 Fixing screw 32 Holding plate 4 Cylinder 5 Tip nozzle 5a Upper end portion 50 Tip nozzle fixing plate 51 Fixing screw 6 Tip 7 Tip removal plate 8 Hanging rod 9 Screw jack 90 Clamp

Claims (1)

  Multiple pistons (2) are aligned and assembled on the lower surface side of the piston drive plate (1) of the dispensing head, and each of the multiple pistons (2) is slidable on the cylinder head (3). In a dispensing machine in which a large number of cylinders (4) to be fitted are aligned, a tip nozzle assembled below the cylinder head (3) on the lower end side of each cylinder (4) provided in the cylinder head (3) The upper end side of the tip nozzle (5) attached to the fixed plate (50) is connected, and the lower end side of the piston (2) that is inserted in the cylinder (4) so as to be movable up and down is inserted into the tip nozzle (5). A recess (w) for inserting an O-ring is inserted in the inlet portion on the upper end side of the tip nozzle (5), and a partial region of the peripheral surface of the piston (2) is pivoted. It is formed in a vertically long cylindrical shape that surrounds along the direction. The upper end side and the lower end side in the recess (w) are made close to the outer peripheral surface of the piston (2) into which the outer diameter is made to fit within the recess (w) and the inner peripheral surface is inserted. The upper O-ring (R) and the lower O-ring (R) are respectively inserted and arranged vertically opposite to each other, and the upper O-ring (R) and the lower O-ring (R) are within the facing distance. A collar (Y) formed in a cylindrical shape having an inner diameter larger than the outer diameter of the piston (2) is formed in a space portion in the formed recess (w). And a space in the recess (w) formed between the inner peripheral surface of the collar (Y) and the outer peripheral surface of the piston (2). Lubricating device in a dispenser characterized in that it is formed in a grease reservoir and filled with grease.

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