JP2020114574A - Preparation apparatus - Google Patents

Abstract

To provide a preparation apparatus capable of reducing an amount of a composition carried away from a container.SOLUTION: A preparation apparatus 1 comprises a container 2 storing a material for preparing a composition, and an agitation member 3 arranged in the container 2 to agitate the material. The container 2 has a first opening 21m for extracting the agitation member 3, and the agitation member 3 is deformable into a contraction shape extractable from the first opening 21m.SELECTED DRAWING: Figure 2

Description

The present invention relates to a preparation device for preparing a composition exemplified in bone cement.

Heretofore, various compositions have been used for various applications. For example, as a composition used in medicine, there is a hard tissue composition such as a material for fixing an artificial joint to a living bone, a bone filling material, or an artificial bone material.

Bone cement is one of the compositions used in medicine. Bone cement is generally prepared by three materials, a powder material, a liquid monomer material, and a polymerization initiator. For example, when bone cement is used for fixing an artificial joint and a living bone, a soft state (soft lump state or dough state) immediately after stirring these three materials and before completely hardening (polymerizing) The condition) bone cement is embedded in the medullary cavity of living bone. Subsequently, the stem of the artificial joint is inserted into the medullary cavity. When the bone cement embedded in the medullary cavity is completely hardened, the artificial joint and the living bone are joined via this bone cement.

The bone cement is prepared just before the procedure so that it can be implanted into the medullary cavity before it is completely hardened, so that it is necessary for each procedure (implantation in the medullary cavity).

Therefore, in order to easily prepare a required amount of bone cement at the site of surgery, various small-sized preparation devices have been proposed for preparing bone cement by agitating a plurality of materials in a closed container with a stirring member ( For example, Patent Document 1).

JP 2002-52331 A

In the preparation device, when the composition is taken out from the container and used, the stirring member becomes an obstacle and is removed from the container. A composition that adheres to the stirring member and is carried away from the container together with the stirring member is lost.

An object of the present invention is to provide a preparation device capable of reducing the amount of the composition taken away from the container.

In order to solve the above conventional problems, the preparation apparatus of the present invention comprises a container for accommodating a material for preparing a composition, and a stirring member arranged in the container and stirring the material, The container has a first opening for extracting the stirring member, and the stirring member can be deformed into a reduced shape that can be extracted from the first opening.

According to the present invention, the amount of the composition carried away from the container can be reduced.

It is a longitudinal cross-sectional view of a bone cement preparation device, and shows a state in which a stirring member is arranged in a container. It is a longitudinal cross-sectional view of a bone cement preparation apparatus, and is a figure which shows the state in the middle of extracting a stirring member from a container. 1. It is a schematic diagram which shows the structure of a partition member, Comprising: The figure corresponded to the III-III cross section of FIG. FIG. 3 is an exploded perspective view of a stirring member (driving unit and fixing unit are omitted). FIG. 4 is a vertical cross-sectional view of a stirring member (driving unit and fixing unit are omitted). The schematic diagram which shows the structure of a stirring blade. FIG. 6 is a vertical cross-sectional view of a container for explaining a method of using the bone cement preparation device. The typical front view showing the important section composition of the modification of a stirring member.

Embodiments of the present invention will be described below with reference to the drawings. The embodiments described below are merely examples, and do not exclude various modifications and application of techniques that are not explicitly described in the following embodiments. Further, each configuration of the embodiment can be variously modified and implemented without departing from the spirit of the invention. Furthermore, the configurations of the embodiments can be selected or combined as needed.

Hereinafter, a bone cement preparation device for preparing bone cement as a composition will be described as an embodiment of the preparation device of the present invention. Further, the bone cement preparation device will be described as being used in a posture in which a gripping part described below is arranged on the upper side and a container described below is arranged on the lower side. Further, each component of the bone cement preparation device also defines the upper and lower sides of the bone cement preparation device based on the state of being assembled in the bone cement preparation device.

Note that, in all the drawings for explaining the embodiments, the same elements are denoted by the same reference symbols in principle and the description thereof may be omitted.

[1. Constitution]
Hereinafter, the configuration of the bone cement preparation device will be described with reference to FIGS. 1 to 6. FIG. 1 is a vertical cross-sectional view of the bone cement preparation device cut along the longitudinal direction thereof, showing a state in which a stirring member is arranged in a container. FIG. 2 is a vertical cross-sectional view of the bone cement preparation device cut along its longitudinal direction, showing a state where the stirring member is being withdrawn from the container. FIG. 3 is a schematic view showing the configuration of the partition member, and is a view corresponding to the III-III cross section of FIG. 1. FIG. 4 is an exploded perspective view of the stirring member (driving section and fixing section are omitted). FIG. 5 is a vertical cross-sectional view of the stirring member (driving portion and fixing portion are omitted) cut along the axial direction thereof. FIG. 6 is a schematic diagram showing the configuration of the stirring blade.

The bone cement preparation device 1 shown in FIGS. 1 and 2 is for preparing bone cement by stirring materials (in the present embodiment, powder material, liquid monomer material and polymerization initiator). The bone cement preparation device 1 includes a cylindrical container 2 having an internal space 2s (hereinafter referred to as "stirring chamber 2s") in which a material is stored, and a stirring member 3 arranged in the container 2 to stir the material. ..

In this embodiment, the stand 4 is attached to the bottom of the container 2. The stand 4 supports the bone cement preparation device 1 in an upright state so that an operator can easily perform a stirring operation. The stand 4 is formed, for example, in a truncated cone shape, and has a cylindrical portion 4a on the upper surface thereof, into which the bottom portion of the container 2 is fitted.

[1-1. container]
As shown in FIGS. 1 and 2, the container 2 includes a container body 20 and a lid portion 21.

The container body 20 includes a cylinder 20a and a substantially dome-shaped rotary body-shaped plunger 20b. The cylinder 20a is arranged so that its axis is along the vertical direction. The upper end of the cylinder 20a is open. That is, the cylinder 20a has an opening 20c (second opening) at its upper end.

The lower end of the cylinder 20a is also open, but the lower end has a plunger 20b fitted therein. An O-ring 5, which is a ring-shaped sealing member, is fitted on the cylindrical outer peripheral surface of the plunger 20b. The outer peripheral surface of the O-ring 5 is in close contact with the inner peripheral surface of the cylinder 20a and seals the lower part of the stirring chamber 2s. As will be described later, the plunger 20b is moved in the stirring chamber 2s toward the opening 20c by the pressure applied from the cement gun attached to the cylinder 20a, and injects the bone cement prepared in the stirring chamber 2s. Used to. Further, a recess 20d into which a tip portion 30x (lower end) of a shaft member 30 (described later) of the stirring member 3 is formed is formed in the center of the ceiling wall of the plunger 20b. A male screw 20e is formed on the outer peripheral surface of the upper portion of the cylinder 20a. As a jig for injecting the bone cement in the stirring chamber 2s, an orthopedic cement injector, an orthopedic cement dispenser, or the like can be used in addition to the cement gun.

The lid portion 21 closes the opening 20c of the container body 20. The lid portion 21 is a substantially heavenly cylindrical member having a short axial length, and includes a ceiling wall 21a that closes the opening 20c of the container body 20 and a cylindrical side wall 21b that hangs from the outer peripheral portion of the lower surface of the ceiling wall 21a. It is configured by being integrated. A female screw 21c that fits into the male screw 20e of the container body 20 is formed on the inner peripheral surface of the side wall 21b. Therefore, the lid portion 21 can be attached to the container body 20 by screwing the lid portion 21 onto the upper portion of the container body 20.

An opening 21f through which the stirring member 3 is inserted is formed in the center of the ceiling wall 21a of the lid portion 21. Further, on the upper surface of the ceiling wall 21a, there are provided two cylindrical bodies 21d and 21e which are coaxially provided upright on the outer peripheral side of the opening 21f.

Furthermore, the side wall 21b is provided with a horizontal tubular portion 21g. The inner space of the tubular portion 21g penetrates the side wall 21b. The tubular portion 21g is used for depressurizing the stirring chamber 2s by depressurizing the stirring chamber 2s before preparation of the bone cement, and for returning the stirring chamber 2s to normal pressure after preparation of the bone cement. ..

The tubular portion 21g will be further described. The tubular portion 21g is configured to be located above the wall surface of the container body 20 in a state where the lid portion 21 is screwed into the container body 20 (completely), and the inner space thereof communicates with the stirring chamber 2s. It is open.

By connecting a suction pipe (not shown) to the tubular portion 21g, the stirring chamber 2s can have a negative pressure. A suction pipe is connected to the tubular portion 21g to maintain the stirring chamber 2s at a negative pressure until the preparation of the bone cement is completed. Therefore, the composition exemplified by bone cement can be prepared while maintaining the stirring chamber 2s at a negative pressure. Then, after the preparation of the bone cement is completed, the suction pipe is removed from the tubular portion 21g and the stirring chamber 2s is returned to normal pressure.

An O-ring 5a is provided between the inner peripheral surface of the lid portion 21 and the outer peripheral surface of the cylinder 20a, and between the inner peripheral surface of the tubular body 21e and the outer peripheral surface of the shaft member 30 described later. , O-rings 5b are provided. These O-rings 5a and 5b improve the airtightness of the stirring chamber 2s, and effectively maintain the stirring chamber 2s at a negative pressure when preparing the bone cement.

A partition member 21h is provided on the inner peripheral side of the lid portion 21 below the tubular portion 21g. Due to the presence of the partition member 21h, the airtightness of the stirring chamber 2s is further improved, and the stirring chamber 2s is kept at a negative pressure during preparation of the bone cement.

As shown in FIG. 3, the partition member 21h is a substantially ring-shaped member, and is provided between a plurality of contact portions 21j that contact the inner peripheral surface of the side wall 21b of the lid portion 21 and the contact portions 21j. The cutout 21k is formed and an opening 21m (first opening) provided in the center thereof. The cutout 21k is for communicating the upper side and the lower side of the partition member 21h. While improving the airtightness of the stirring chamber 2s, a negative pressure can be supplied from the tubular portion 21g above the partition member 21h to the stirring chamber 2s below the partition member 21h via the notch 21k. The opening 21m is for inserting a shaft member 30 of the stirring member 3 described later. In FIG. 3, the cylinder 20a, the stirring member 3, and the O-ring 5a are omitted.

[1-2. Stirring member]
As shown in FIGS. 1 and 2, the stirring member 3 includes a shaft member 30, a stirring blade 31, a drive unit 32, and a fixing unit 33. The shaft member 30 and the stirring blade 31 are arranged in the stirring chamber 2s and are for stirring the material in the stirring chamber 2s. The drive unit 32 is for driving the shaft member 30 and the stirring blade 31 to rotate about the axis of the shaft member 30. The fixing portion 33 is for fixing the stirring member 3 to the lid portion 21.

Hereinafter, the shaft member 30, the stirring blade 31, the driving unit 32, and the fixing unit 33 will be further described.

First, the shaft member 30 will be described. The shaft member 30 is arranged in the stirring chamber 2s in a posture with its axis centered in the vertical direction. The shaft member 30 has substantially the same axial length as the cylinder 20a, and the tip portion 30x thereof has a tapered shape. This tip portion 30x enters the recess 20d at the center of the ceiling wall of the plunger 20b as described above. When the tip portion 30x enters the recess 20d, the recess 20d suppresses fluctuation of the shaft member 30 and stabilizes the rotation of the shaft member 30. Further, the shaft member 30 has a hollow shape having a hollow portion 30b extending in the axial direction. A drive rod 32a described later is inserted into the hollow portion 30b.

As shown in FIGS. 4 and 5, the shaft member 30 includes a first shaft member 30A and a second shaft member 30B. The first shaft member 30A is a semi-cylindrical member in which the cylindrical outer peripheral portion of the shaft member 30 excluding the front end portion 30x and the rear end portion (upper portion) 30y is vertically halved. The second shaft member 30B is a member that constitutes a part of the shaft member 30 excluding the first shaft member 30A, and is a member that includes a front end portion 30x and a rear end portion 30y. Two gaps along the axial direction of the shaft member 30 are formed between the first shaft member 30A and the second shaft member 30B on the radially opposite sides of their peripheral surfaces. Each of these gaps functions as a storage unit 30s that stores the stirring blade 31.

In addition, a pin P1 for attaching the stirring blade 31 to the shaft member 30 projects toward the first shaft member 30A on the mounting surface of the second shaft member 30B that faces the first shaft member 30A with the storage portion 30s interposed therebetween. It is set up.

Next, the stirring blade 31 will be described. As best shown in FIGS. 4 to 6, the stirring blade 31 is composed of a plurality of links 31a, 31b, 31c that are rotatably pin-coupled to each other. Insertion holes h1 are formed at one ends of the links 31a and 31b, and vertically adjacent pins P1 are inserted into these insertion holes h1. As a result, one ends of the links 31a and 31b are rotatably coupled to the pin P1.

Insertion holes h2 are formed at the other ends of the links 31a and 31b, respectively. Further, insertion holes h3 are formed at both ends of the link 31c. The pins P2 (see FIG. 4) are inserted into the insertion holes h2 and h3, respectively. As a result, the other ends of the links 31a and 31b and the respective ends of the link 31c are rotatably coupled by the pin P2. Although the pin P2 is simply shown in FIG. 4, the pin P2 is divided into two in the axial direction, and is configured to include a first pin and a second pin connected to the first pin. For example, when connecting the link 31a and the link 31b with the pin P2, the first pin inserted into the link 31a and the second pin inserted into the link 31c are connected.

The stirring blade 31 constituted by the mutually rotatable links 31a, 31b, 31c is unfolded when stirring the material in the stirring chamber 2s, as shown in FIG. It becomes a developed shape that projects from 30 in the radial direction. In the developed shape, the stirring blade 31 is inclined downward (the reason for this will be described later). On the other hand, the stirring blade 31, like the first stirring blade 31 from the top in FIG. 2, has a storage shape that is stored in the storage portion 30s of the shaft member 30 when the stirring blade 31 is extracted from the stirring chamber 2s. Become. That is, the stirring blade 31 is folded and deformed into a storage shape in which the links 31a, 31b, and 31c are aligned in a line while overlapping with each other, and enters the storage section 30s.

The stirring blade 31 has inner walls (that is, surfaces that come into sliding contact with the outer peripheral surfaces of the pins P1, P2) of the links 31a, 31b, 31c facing the insertion holes h1, h2 (spaces) Sa, Sb, Sc (FIG. (See FIG. 6) and the frictional force generated between the pins P1 and P2 suppress the rotation of the links 31a, 31b, 31c, and suppress the deformation of the stirring blade 31. That is, when the material is stirred, the stirring blade 31 is held in the expanded shape. Of course, by manually applying force, the stirring blade 31 can be easily deformed from the expanded shape to the stored shape, and conversely, from the stored shape to the expanded shape.

Next, the drive unit 32 will be described. As shown in FIGS. 1 and 2, a drive rod 32a, a drive bush 32b, and a grip portion 32c are provided.

The drive rod 32a extends vertically and is inserted into the hollow portion 30b of the shaft member 30 from above. The drive rod 32a is fixed to the upper end (inlet of the hollow portion 30b) of the shaft member 30 via a drive bush 32b. The drive rod 32a has a twisted shape called a Barley twist shape. Specifically, the drive rod 32a has a spiral edge 32a1 extending vertically on the outer peripheral surface thereof.

The drive bush 32b is fixed to the inlet of the hollow portion 30b of the shaft member 30 by screwing or the like as described above, and includes the cylindrical bush body 32b1 and the flange 32b2 integrally formed on the outer periphery of the upper end of the bush body 32b1. .. The bush main body 32b1 is inserted into the hollow portion 30b, and the flange 32b2 is placed on the fixing portion 33 described later. A spiral groove that traces the spiral edge 32a1 of the outer peripheral surface of the drive rod 32a is formed on the inner peripheral surface of the bush body 32b1.

The grip portion 32c is gripped by an operator when operating the drive portion 32, and is fixed to a portion of the drive rod 32a protruding above the fixing portion 33. The operator repeatedly grips the grip portion 32c with one hand and pushes and pulls the drive rod 32a up and down repeatedly. That is, the worker repeatedly pulls the drive rod 32a upward from the drive bush 32b and pushes the drive rod 32a downward toward the drive bush 32b to reciprocate the drive rod 32a up and down. When the drive rod 32a is repeatedly reciprocated up and down, the drive rod 32a is driven by the spiral edge 32a1 on the outer peripheral surface of the drive rod 32a, and a spiral groove meshing with the edge 32a1 is formed on the inner peripheral surface of the drive bush 32b. Repeats forward and reverse rotation alternately. As a result, integrally with the shaft member 30 fixed to the drive bush 32b, the stirring blade 31 alternately repeats forward rotation and reverse rotation about the axis of the shaft member 30.

The fixing portion 33 includes a first cap 33a and a second cap 33b attached above the first cap 33a. Each shape of the first cap 33a and the second cap 33b is roughly a cylindrical shape having a ceiling wall with a short axial length.

The first cap 33a includes an outer side wall 33a1 and an inner side wall 33a2, each of which has a cylindrical shape and is arranged coaxially with the shaft member 30. The outer side wall 33a1 is fitted to the outer peripheral side of the outer cylindrical body 21d of the lid 21, and the inner side wall 33a2 is fitted to the outer peripheral side of the inner cylindrical body 21e of the lid 21. The side walls 33a1 and 33a2 have elasticity, and are expanded outward when they are attached to or removed from the tubular bodies 21d and 21e of the lid portion 21.

A cylindrical body 33a3 arranged coaxially with the shaft member 30 is further provided on the upper surface of the ceiling wall of the first cap 33a. The second cap 33b is fitted on the outer periphery of the tubular body 33a3. Inside the cylindrical body 33a3, a hole 33a4 is provided directly above the hollow portion 30b, and a hole 33b1 is provided directly above the hollow portion 30b of the ceiling wall of the second cap 33b. 32a is inserted into the hollow portion 30b through these holes 33b1 and 33a4.

The drive bush 32b is arranged between the second cap 33b and the tubular body 33a3. Specifically, the flange 32b2 of the drive bush 32b is placed between the cylindrical body 33a3 and the hole 33a4, and the bush body 32b1 of the drive bush 32b is inserted into the hole 33a4.

The drive bush 32b is fixed to the upper end of the shaft member 30 as described above, and the ceiling wall of the first cap 33a of the fixed portion 33 is provided between the lower surface of the flange 32b2 of the drive bush 32b and the upper end of the shaft member 30. It is fitted loosely. As a result, the shaft member 30 and the stirring blade 31 are rotatably assembled to the fixed portion 33 via the drive bush 32b.

A flat seal ring 5c having a width in the radial direction is provided between the lower surface of the ceiling wall of the first cap 33a and the upper end of the cylindrical body 21d outside the lid portion 21. With this seal ring 5c, the airtightness between the lid portion 21 and the fixed portion 33 is improved, and thus the airtightness of the stirring chamber 2s is improved, and the stirring chamber 2s is kept at a negative pressure during preparation of bone cement.

[2. how to use]
Hereinafter, a method of using the bone cement preparation device will be described with reference to FIG. 7 in addition to FIGS. 1 and 2. FIG. 7 is a cross-sectional view for explaining a method of using the bone cement preparation device 1.

First, the bone cement material is stored in the container body 20. Then, the lid 21 with the stirring member 3 attached is attached to the container body 20. Before the lid 21 is attached to the container body 20, the stirring blade 31 is formed into a developed shape by a manual operation of an operator.

A suction pipe is connected to the tubular portion 21g, and the stirring chamber 2s is depressurized by the suction pipe to a negative pressure via the tubular portion 21g so that air bubbles do not enter the bone cement prepared from this. The stirring chamber 2s is maintained at a negative pressure by the suction tube until the preparation of the bone cement is completed.

Then, by pushing and pulling the grip portion 32c, the stirring blades 31 rotate and the materials in the container 2 are stirred, and bone cement in a soft lump (dough) state before being completely cured (polymerized) is prepared. It

Then, the suction pipe is removed from the tubular portion 21g, and the stirring chamber 2s is returned to normal pressure. By returning the stirring chamber 2s to the normal pressure, the subsequent withdrawal of the stirring member 3 from the container 2 becomes easy.

Next, the stirring member 3 is pulled out from the container 2. While passing through the opening 21m of the partition member 21h of the lid portion 21, the stirring blade 31 is pressed by the frame portion of the partition member 21h that forms the periphery of the opening 21m, and is folded from the expanded shape to the storage shape. That is, the stirring member 3 is stored in the shaft member 30. When the stirring member 3 is stored in the shaft member 30, the stirring member 3 is deformed into a reduced shape, extracted from the opening 21m, further extracted from the opening 21f above it, and extracted from the container 2. .. In addition, since the stirring blade 31 is inclined so that the width (diameter in the radial direction) becomes narrower toward the upper opening 21m in the expanded shape, when the stirring member 3 is pulled out from the opening 21m, the opening 21m smoothly. It goes in and is folded. The partition member 21h can be omitted. When the partition member 21h is omitted, the stirring blade 31 is pressed by the frame portion of the ceiling wall 21a forming the periphery of the opening 21f in the process of passing through the opening 21f and folded from the expanded shape to the storage shape. Become.

Then, the lid 21 is removed from the container body 20. After that, as shown by black arrows in FIG. 7, the stand 4 is removed from the container 2, and the fixing portion 6a of the nozzle 6 is screwed onto the outer peripheral side of the upper end of the container body 20. Then, a jig (not shown) such as a cement gun is attached to the plunger 20b side of the container 2. The trigger of this cement gun can apply pressure to the plunger 20b. The plunger 20b to which pressure is applied is pushed toward the nozzle 6 side, and the bone cement S in the container 2 is directly ejected from the nozzle 6 to the affected part such as the intramedullary cavity.

[3. Action effect]
According to the bone cement preparation device 1 of one embodiment of the present invention, the following operational effects are obtained.

(1) After the materials in the container 2 are stirred to prepare bone cement, the stirring blades 31 are stored in the storage portion 30s of the shaft member 30, and the stirring member 3 is deformed into a reduced shape. Since the surface area of the stirring member 3 is reduced by deforming the stirring member 3 into a reduced shape, when the stirring member 3 is pulled out from the openings 21f and 21m of the container 2, the stirring member 3 adheres to the surface of the stirring member 3 and the stirring member 3 together with the container. It is possible to reduce the amount of bone cement that is carried away from No. 2.

(2) When the stirring blade 31 enters the storage section 30s between the first shaft member 30A and the second shaft member 30B, the stirring blade 31 is attached to the stirring blade 31 by the first shaft member 30A and the second shaft member 30B. The bone cement that had been removed is scraped off from the stirring blade 31. Therefore, also in this respect, the amount of bone cement that adheres to the surface of the stirring member 3 and is carried away from the container 2 together with the stirring member 3 can be reduced.

(3) When the stirring member 3 is pulled out, the stirring blade 31 comes into contact with the frame portion surrounding the opening 21m of the container 2 so that the stirring blade 31 is pushed into the shaft member 30 and stored, and the stirring member 3 can be pulled out from the opening 21m. It is transformed into a reduced shape of various sizes. Therefore, a special operation for deforming the stirring member 3 into a reduced shape is not required, so that the work of extracting the stirring member 3 from the container 2 can be easily and quickly performed. Furthermore, since the stirring member 3 can be promptly pulled out from the container 2, the bone cement can be used while the bone cement is not excessively hardened. Further, the stirring blade 31 comes into contact with the frame portion surrounding the opening 21m of the container 2, whereby the bone cement attached to the stirring blade 31 is scraped off from the stirring blade 31 by this frame portion. Therefore, the amount of bone cement carried away from the container 2 can be further reduced.

(4) Since the stirring blade 31 is stored in the storage portion 30s of the shaft member 30 in a folded and contracted state, the volume of the storage portion 30s can be reduced, and the shaft member 30 is provided to provide the storage portion 30s. It is possible to suppress the size increase. Therefore, the container 2 and thus the bone cement preparation device 1 can be downsized as compared with the case where the stirring blade 31 is stored in the shaft member 30 without being folded. Further, when the inner volume of the container 2 is the same, since the shaft member 30 can be downsized, more material can be accommodated in the container 2, and thus more bone cement can be prepared.

(5) The stirring blade 31 is configured to be foldable by the plurality of links 31a, 31b, 31c that are rotatably assembled, and is stored in the shaft member 30 in a folded state. A configuration for storing the wing 31 can be realized.

(6) The lid 21 is provided with openings 21f and 21m for extracting the stirring blade 31 from the container 2, and the stirring blade 31 is extracted from the container 2 through the openings 21f and 21m without removing the lid 21. be able to. Since these openings 21f and 21m are smaller than the openings 20c of the container body 20, the frame portion facing these openings 21f and 21m reliably scrapes the bone cement adhering to the stirring blade 31 from the stirring blade 31. Can be taken.

[4. Modification]
(1) The stirring blade 31 need not be foldable as in the above embodiment as long as it can be stored in the shaft member 30. The configuration of the stirring member 3 in which the stirring blade 31 is not folded will be described with reference to FIG. FIG. 8 is a schematic front view showing a main part configuration of a modified example of the stirring member.

The stirring blade 31A of the stirring member 3A shown in FIG. 8 is configured by a plate material formed in a substantially triangular shape in the front view shown. The stirring blade 31A can be stored in a storage portion 30v that is concavely contacted with the shaft member 30. Specifically, the stirring blade 31A can swing to the left and right (in the radial direction of the shaft member 30) by a pin P1 provided in the storage portion 30v at its upper end portion on the opening 21f side (see FIGS. 1 and 2). It is supported. As a result, the stirring blade 31A is configured to be retractable from the storage section 30v. At the time of stirring, the stirring blade 31A is in a state of projecting from the storage portion 30v as shown by the solid line (hereinafter referred to as “projecting state”), and when it is extracted from the container 2, it is pushed into the frame portion around the opening 21m. Then, as shown by the alternate long and two short dashes line, it becomes a state of being stored in the storage section 30v. In addition, a biasing member such as a spring that biases the stirring blade 31A in a direction projecting from the storage portion 30v may be provided in the storage portion 30v so that the stirring blade 31A is maintained in a protruding state during stirring.

(2) In the above embodiment, an example in which the present invention is applied to a device for preparing bone cement as a hard tissue repairing composition used for fixing a hard tissue such as bone and/or cartilage to an artificial joint However, the present invention is a medical composition other than bone cement, for example, adhesion between hard tissues, filling into hard tissues, adhesion and/or bonding between hard tissues and metal artificial products, and hard tissues. It is applicable not only to adhesion and/or joining with other tissues such as soft tissue, filling material for bone defect, bone filling material, artificial bone, etc., but also to devices for preparing various compositions for various uses. is there.

INDUSTRIAL APPLICABILITY The present invention is suitably used as a preparation device for preparing bone cement, for example.

1 Bone Cement Preparation Device 2 Container 2s Stirring Chamber 3, 3A Stirring Member 4 Stand 4a Cylinder 5,5a, 5b O-ring 5c Seal Ring 6 Nozzle 6a Fixing 20 Container Body 20a Cylinder 20b Plunger 20c Opening (Second Opening)
20d recess 20e male screw 21 lid 21a ceiling wall 21b side wall 21c female screw 21d, 21e tubular body 21f opening 21g tubular portion 21h partition member 21j contact portion 21k notch 21m opening (first opening)
30 Shaft member 30A First shaft member 30B Second shaft member 30b Hollow part 30s, 30v Storage part 30x Tip part 30y Rear end part 31,31A Stirring blade 31a, 31b, 31c Link 32 Drive part 32a Drive rod 32a1 Edge 32b Drive bush 32b1 Bush body 32b2 Flange 32c Grip 33 Fixing 33a First cap 33a1, 33a2 Side wall 33a3 Cylindrical body 33a4, 33b1 Hole 33b Second cap h1, h2, h3 Insertion hole P1, P2 Pin S bone cement

Claims (6)

A container containing materials for preparing the composition;
A stirring member disposed in the container and stirring the material,
The container has a first opening for extracting the stirring member,
The said stirring member is a preparation apparatus which can be deform|transformed into the reduced shape which can be pulled out from the said 1st opening. The stirring member includes a shaft member and a stirring blade provided on the shaft member,
The shaft member has a storage portion for storing the stirring blade,
The preparation device according to claim 1, wherein the stirring member has the reduced shape when the stirring blade is stored in the storage portion. The preparation apparatus according to claim 2, wherein when the stirring member is pulled out from the first opening, the stirring blade comes into contact with a frame portion surrounding the first opening and is pushed into the storage portion to be stored. The said stirring blade is a foldable structure, The preparation apparatus of Claim 2 or 3 stored in the said storage part in the folded state. The said stirring blade is a preparation apparatus of Claim 4 comprised by the some link assembled so that rotation could be carried out. The container includes a container body having a second opening, and a lid portion that closes the second opening,
The said 1st opening is a preparation apparatus as described in any one of Claims 1-5 formed in the said lid part and smaller than the said 2nd opening.

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