Cylinder tip mounting head, and head device and movement device each using same

Patent metadata

Field	Value
Publication number	US-9925535-B2
Application number	US-201415317595-A
Country	US
Kind code	B2
Filing date	Jun 17, 2014
Priority date	Jun 17, 2014
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A cylinder tip mounting head includes: a shaft member; a first cylindrical rod having a cylindrical space, which is mounted to a lower end of the shaft member, which is configured to move in the up-down direction integrally with the shaft member; a stationary second cylindrical rod, which has a housing space for housing the first cylindrical rod so that the first cylindrical rod is movable in the up-down direction, the stationary second cylindrical rod including a syringe mounting portion; and a discharge rod housed in the cylindrical space in the first cylindrical rod, the discharge rod including a plunger mounting portion. The discharge rod is configured to coordinate with the movement of the shaft member in the up-down direction so that the plunger mounted to the discharge rod reciprocates in the tubular passage in the syringe to suck the object into the tubular passage and discharge the sucked object.

First claim

The invention claimed is:

1. A cylinder tip mounting head to be mounted with a cylinder tip, the cylinder tip including a syringe having a tubular passage inside serving as a suction path for an object, and a plunger configured to reciprocate in the tubular passage, the cylinder tip mounting head comprising:
a shaft member configured to move in an up-down direction;
a first cylindrical rod, which is mounted to a lower end of the shaft member, which is configured to move in the up-down direction integrally with the shaft member, and which has a cylindrical space formed therein;
a stationary second cylindrical rod, which has a housing space for housing the first cylindrical rod so that the first cylindrical rod is movable in the up-down direction,
the stationary second cylindrical rod including, at a lower end, a syringe mounting portion to which a base end portion of the syringe is to be fitted; and

a discharge rod housed in the cylindrical space in the first cylindrical rod,
the discharge rod including, at a lower end, a plunger mounting portion to which a base end portion of the plunger is to be fitted,

wherein the discharge rod is configured to coordinate with the movement of the shaft member in the up-down direction so as that when the plunger is mounted to the discharge rod the plunger reciprocates in the tubular passage in the syringe to suck the object into the tubular passage and discharge the sucked object, wherein
the discharge rod is housed in the cylindrical space so as to be moveable relative to the first cylindrical rod;
the cylinder tip mounting head further comprises a coordinating mechanism for forming a first state in which the discharge rod coordinates with the movement of the shaft member in the up-down direction and a second state in which the discharge rod is stopped irrespective of the movement of the shaft member in the up-down direction;
in the first state, the plunger mounting portion of the discharge rod protrudes downward from a lower end of the first cylindrical rod, and the plunger reciprocates in the tubular passage along with the movement of the shaft member in the up-down direction; and
in the second state, along with the movement of the shaft member in a down direction, the plunger mounting portion of the discharge rod is housed in the cylindrical space in the first cylindrical rod, and the plunger mounted to the plunger mounting portion is pressed by the lower end of the first cylindrical; rod and separated from the plunger mounting portion.

2. The cylinder tip mounting head according to claim 1 , wherein:
the coordinating mechanism includes:
an elastic member, which is interposed between the shaft member and the discharge rod in the cylindrical space and is configured to generate an urging force;
a stopper provided in the discharge rod; and
a locking portion, which is provided in the second cylindrical rod and is to interfere with the stopper;

in the first state, a part of the discharge rod abuts, so as to stop, on a part of the first cylindrical rod by the urging force, thereby forming a state in which the discharge rod coordinates with the shaft member; and
in the second state, the stopper and the locking portion interfere with each other so that the discharge rod moves upward relatively against the urging force, thereby housing the plunger mounting portion into the cylindrical space.

3. The cylinder tip mounting head according to claim 2 , wherein:
the discharge rod includes:
a first columnar portion including the plunger mounting portion and having a first outer diameter;
a second columnar portion, which is continuously provided above the first columnar portion and has a second outer diameter larger than the first outer diameter, the second columnar portion having the stopper formed therein; and
a third columnar portion, which is continuously provided above the second columnar portion and has a third outer diameter larger than the second outer diameter;

the first cylindrical rod includes:
a first cylinder portion, which has an inner diameter slightly larger than the first outer diameter and is configured to house the first columnar portion;
a second cylinder portion, which is continuously provided above the first cylinder portion, has an inner diameter larger than the second outer diameter, and is configured to house the second columnar portion;
a third cylinder portion, which is continuously provided above the second cylinder portion, has an inner diameter larger than the third outer diameter, and is configured to house the third columnar portion; and
a hole extending in the up-down direction, which is formed in a circumferential wall of the second cylinder portion and allows relative movement of the stopper;

the elastic member includes a coil spring arranged between a lower end surface of the shaft member and an upper surface of the third columnar portion;
in the first state, the third columnar portion abuts, so as to stop, on a shoulder portion that is formed based on a diameter difference between the second cylinder portion and the third cylinder portion; and
in the second state, the stopper moves relatively in the hole, and a lower end surface of the first cylinder portion presses a base end portion of the plunger.

4. The cylinder tip mounting head according to claim 1 , wherein:
in the second state, a height position of the plunger mounting portion of the discharge rod housed in the cylindrical space in the first cylindrical rod is substantially the same as a height position of the syringe mounting portion of the second cylindrical rod; and
when the plunger mounted to the plunger mounting portion is pressed by the lower end of the first cylindrical rod and separated from the plunger mounting portion, the syringe mounted to the syringe mounting portion is pressed by the plunger and separated from the syringe mounting portion.

5. A cylinder tip mounting head to be mounted with a cylinder tip, the cylinder tip including a syringe having a tubular passage inside serving as a suction path for an object, and a plunger configured to reciprocate in the tubular passage,
the cylinder tip mounting head comprising:
a shaft member configured to move in an un-down direction;
a first cylindrical rod, which is mounted to a lower end of the shaft member, which is configured to move in the up-down direction integrally with the shaft member, and which has a cylindrical space formed therein;
a stationary second cylindrical rod, which has a housing space for housing the first cylindrical rod so that the first cylindrical rod is moveable in the up-down direction,
the stationary second cylindrical rod including, at a lower end, a syringe mounting portion to which a base end portion of the syringe is to be fitted; and

a discharge rod housed in the cylindrical space in the first cylindrical rod,
the discharge rod including, at a lower end, a plunger mounting portion to which a base end portion of the plunger is to be fitted,

wherein the discharge rod is configured to coordinate with the movement of the shaft member in the up-down direction so as that when the plunger is mounted to the discharge rod the plunger reciprocates in the tubular passage in the syringe to suck the object into the tubular passage and discharge the sucked object,
wherein the shaft member is a screw shaft, and includes:
a first screw shaft rotatably driven about a rotary axis; and
a second screw shaft including an upper end portion to be screwed with the first screw shaft and a lower end portion to be mounted with the first cylindrical rod, the second screw shaft being configured to move in the up-down direction.

6. A head device, comprising:
the cylinder tip mounting head according to claim 5 ;
a motor having a rotary shaft;
a transmission m

Assignees

• Yamaha Motor Co Ltd

Inventors

• Ito Saburo
• Osada Yukimasa
• Izume Yohei

Classifications

• G01N35/1065

  Multiple transfer devices · CPC title

• G01N35/1011

  Control of the position or alignment of the transfer device · CPC title

• B01L3/02

  Burettes; Pipettes · CPC title

• G01N35/1081

  characterised by the means for relatively moving the transfer device and the containers in an horizontal plane (G01N35/1011 takes precedence) · CPC title

• B01L3/0227

  Details of motor drive means (B01L3/0231, B01L3/0234 take precedence) · CPC title