JP2002306433A - Method for manufacturing inner core in arm belt for tonometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily mold an arm belt for a tonometer. SOLUTION: An inner core main body 3 whose sectional shape with a fitting leg piece 5 is curved into a cylindrical shape or a spiral shape is molded by injecting a thermoplastic resin into a cavity of a mold and solidifying it by cooling and one side part of the inner core main body 3 is released by moving forward together a core 11 and a movable side mold body 9 and in addition, after the core 11 is stopped, under a condition where the fitting leg piece 5 is hooked by the movable insert 13, by forwarding the movable mold body 9 and pulling the inner core main body 3, while both end parts of the inner core main body 3 are elastically deformed and opened, the core 11 is made to get out of the inside of the inner core main body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a core in a cuff of a sphygmomanometer.

[0002]

2. Description of the Related Art There are two types of arm bands for a sphygmomanometer: a type worn on the upper arm and a type worn on the wrist. The type worn on the upper arm has the arm band connected to the main body of the sphygmomanometer via a tube. However, the type worn on the wrist is a little small, and the main body of the sphygmomanometer is directly attached to the arm band. As shown in FIG. 1, the arm band 1 of the type worn on the wrist has a spiral part 2 at one end, and an air bag 4 is provided on the inner surface of the spiral part 2, and the air bag is provided. A structure in which a core body 3 curved in a cylindrical shape, a spiral shape, or the like is superposed on the outside of the core 4. The blood pressure monitor main body (not shown) is provided in the core main body 3.
The mounting leg pieces 5 and 6 for connecting to are integrally protruded. The core body 3 and the mounting leg pieces 5 and 6 are often manufactured by injection molding using a mold with a hard plastic material that can be elastically deformed. However, molding is difficult due to its special shape. There has been a problem that the mold structure becomes complicated, productivity is not increased, and costs are increased. In FIG. 1, reference numeral 7 denotes an air port for sending air into the air bag 4, and passes through a hole provided in the core 3.

[0003]

SUMMARY OF THE INVENTION According to the present invention, a core having a complicated shape, such as a cylindrical shape or a spiral shape, used for an arm band of a sphygmomanometer can be easily formed. It is an object of the present invention to provide a manufacturing method and a manufacturing apparatus capable of reducing costs by simplifying the structure and operation of the device and increasing productivity.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, a method of manufacturing a core in a cuff of a sphygmomanometer according to the present invention comprises:
A fixed-side mold 8, a movable-side mold 9 that can move forward with respect to the fixed-side mold 8, a fixed-side auxiliary mold 10 that can slide in a side direction with respect to the fixed-side mold 8, and a movable-side mold The movable core 13 that can be pulled out from the body 9 and the core 11 disposed inside the movable core 13 and the cavity 1 that forms the core body 3
6 and a cavity 17 that forms the mounting leg piece 5 are formed so as to communicate with each other, and the molten resin is injected into the cavities 16 and 17 of the mold and solidified by cooling. A fixed-side auxiliary mold body 10 having a leg piece 5 and a core body 3 having a cross-sectional shape curved into a cylindrical shape or a spiral shape, and then having a tip portion inserted between both ends of the core body 3. Is slid in the side direction to allow the fixed-side auxiliary mold body 10 to escape from between the two end portions of the core body 3, and then the core 1
1 and the movable-side mold body 9 are moved forward together so that one side portion of the core body 3 escapes from the fixed-side mold body 8, and after the core 11 is stopped, the movable leg 13 is attached by the movable core 13. The core 11 is moved from the inside of the core body 3 to the outside while the ends of the core body 3 are elastically deformed and opened by advancing the movable-side mold body 9 and pulling the core body 3 with the hook 5 held. Then, the movable core 1 is removed from the movable side mold 9.
3, the core body 3 is protruded from the movable mold body 9 by a protruding pin 20.

Further, the apparatus for manufacturing the core of the arm band of the sphygmomanometer according to the present invention comprises a fixed-side mold 8 and a movable-side mold 8 for forming a cavity 16 having a cross-sectional shape curved into a cylindrical shape or a spiral shape. 9, a movable core 13 for providing the fixed-side auxiliary mold body 10 and the core 11 and forming a cavity 17 communicating with the cavity 16 together with the movable-side mold body 9.
In the mold clamping state, the molten resin is injected into the cavities 16 and 17 and solidified by cooling, so that the core body 3 and the mounting leg 5 can be integrally formed in each cavity. In addition, the fixed-side auxiliary mold 10 is slidable in the side direction with respect to the fixed-side mold 8 so that the fixed-side auxiliary mold 10 can escape from between both ends of the molded core body 3. Core body 3
Of the core 1 so that one side of the
1 and the movable-side mold body 9 can be moved forward with respect to the fixed-side mold body 8, and the core 11 is opened from the inside of the core body 3 while opening both ends of the molded core body 3 by elastic deformation. The core 11 can be stopped so that it can escape to the outside, and the movable side mold 9 can be moved forward with respect to the core 11 while the mounting leg 5 is hooked by the movable core 13 and the core body 3 is pulled. None, furthermore, the movable core 13 can be pulled out of the movable side mold body 9 so that the hook on the mounting leg piece 5 can be released, and the core body 3 can be protruded from the movable side mold body 9 by a protruding pin 20. The configuration is characterized in that a metal mold is provided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, the core of the present invention is manufactured by injection molding with a mold using a hard plastic as a material. That is, the present invention uses an injection molding machine as a manufacturing apparatus.

As shown in FIG. 2, the mold of the injection molding machine includes a fixed mold 8, a movable mold 9, and a fixed auxiliary mold 1.
0, a core 11, a movable auxiliary body 12, a movable core 13, a guide pin 14, a stopper 15, and the like. The movable mold 9 can be moved forward with respect to the fixed mold 8 to be opened, and the core 11 can be moved forward and away from the fixed mold 8 by the guide pins 14. Further, the core 11 can be stopped by the stopper 15, the movable-side mold body 9 can move further forward and away from the core 11 with respect to the stopped core 11, and the fixed-side auxiliary mold body 10 can be moved to the fixed-side auxiliary mold body. The mold 8 can be slid in the side direction, and the movable core 13 can be pulled out of the movable mold 9 in the direction perpendicular to the drawing. Further, the movable-side auxiliary mold body 12 can be slidable in the side direction with respect to the movable-side mold body 9. That is, assuming that the direction in which the movable mold 9 and the core 11 move relative to the fixed mold 8 is the X-axis direction, the fixed auxiliary mold 10 and the movable auxiliary mold 12 are respectively movable with the fixed mold 8 and the movable mold. The movable core 13 moves in the Y-axis direction orthogonal to the X-axis with respect to the side mold 9.
Moves in the Z-axis direction perpendicular to the X-axis and the Y-axis with respect to the movable side mold body 9.

FIG. 2 shows a closed state of the mold. In this mold clamping state, a cavity is formed between the inner core 11 and the outer fixed mold 8, movable mold 9, fixed auxiliary mold 10, movable auxiliary mold 12, and movable core 13. Is formed. This cavity has a cavity 16 for forming the core body 3 having a cylindrical or spiral cross section.
And cavities 17 and 18 for forming hook-shaped mounting leg pieces 5 and 6.
7, 18 are in communication.

[0009] Both ends of the cylindrical or spiral cavity 16 forming the core body 3 are separated from each other without communication, and a gap is provided therebetween. That is, by inserting the tip of the fixed-side auxiliary mold body 10 into this gap,
Cylindrical or spiral cavity 1 forming the core body 3
6 are separated so that they do not communicate with each other.

A cavity 17 forming one of the mounting leg pieces 5 is formed between the movable mold 9, the movable auxiliary mold 12 and the movable core 13. The movable core 13 has a shape capable of hooking the hook portion 19 of the mounting leg 5 on one side formed by the cavity 17.

Next, the molding step will be described. First,
In the mold clamping state shown in FIG. 2, the resin melted by heating and melting is injected into the cavity 16 forming the core body 3. The sprue can be provided at an appropriate location, for example, at a location indicated by reference symbol A in the drawing. At this time, the mounting leg pieces 5, 6
Of course, the resin is also injected into the cavities 17 and 18 that form.

Next, as shown in FIG.
After the resin injected into the molds 6, 17, 18 is cooled and solidified to form the core body 3 with the mounting leg pieces 5, 6, the fixed-side auxiliary mold body 10 is moved sideward with respect to the fixed-side mold body 8. The leading end of the fixed-side auxiliary mold body 10 escapes from between the two end portions of the core body 3 by sliding in the direction. Thereby, even when the core body 3 has a spiral shape and one end thereof is extended so as to overlap with the outside of the other end, when the core body 3 moves forward as described later, the extension portion is formed. There is no hindrance by the fixed-side auxiliary mold body 10.

Next, as shown in FIG.
The core 11, the movable-side auxiliary mold body 12, and the movable core 13 are moved forward with respect to the fixed-side mold body 8 together, so that the formed one-side portion of the core body 3 and the one-side mounting leg piece 6 are fixed-side molds. Body 8
Escape from The core 11 moves while being guided by the guide pin 14, but stops by contacting the stopper 15.

Next, as shown in FIG.
1, the movable-side mold 9 and the movable-side auxiliary mold 12
And the movable core 13 is moved forward together to separate them from the core 11. At this time, the core body 3 is attached to the movable mold 9 by one of the mounting leg pieces 5 hooked by the movable core 13 and is pulled by the movable mold 9 and the movable core 13 as they are. Move forward together. At this time, the core 11 escapes from the inside of the core body 3 to the outside because both ends of the core body 3 are opened by elastic deformation. The core body 3 is restored after the core 11 escapes, and returns to a cylindrical or spiral shape again.

Finally, as shown in FIG. 6, the movable auxiliary mold body 12 is slid in the side direction with respect to the movable mold body 9, and the movable core 13 is pulled out of the movable mold body 9 to be movable. The state in which the mounting leg piece 5 is locked by the core 13 is eliminated. Then, the core body 3 is protruded by the protruding pins 20 provided so as to penetrate the movable-side mold body 9, and the core body 3 and the mounting leg pieces 5 are released from the movable-side mold body 9. The movable auxiliary body 12 can be slid together with the fixed auxiliary body 10. By providing the movable auxiliary body 12, the cavity 17 of the mounting leg 5 can be easily formed, and the hole 21 can be provided in the core body 3, and the movable auxiliary body 12 can be formed. Is slidable, so that the mounting leg piece 5 is easily released from the movable mold body 9.

[0016]

The method and apparatus for manufacturing the core in the arm band of the sphygmomanometer according to the present invention are as described above, and the core main body 3 having a cylindrical or spiral shape, that is, one end is the other end. Even if the core body 3 has a complicated shape and is extended so as to overlap with the outside of the body, it can be formed extremely easily without the extension at one end being in the way. Further, by moving the movable side mold body 9 and pulling the core body 3 in a state where the mounting leg piece 5 is hung by the movable core 13, the core is opened while elastically deforming both ends of the core body 3. Since the core 11 can easily escape from the inside of the core body 3 to the outside, the operation of extracting the core 11 from the inside of the core body 3 to the outside becomes unnecessary, and the structure and operation of the mold can be simplified. it can. Further, the core body 3 is connected to the movable core 13.
Since the mounting leg pieces 5 are used to be hooked by the movable side mold body 9 so that the movable core body 9 can be pulled by the movable side mold body 9, a hook-shaped projection or the like which is not practically necessary for the core body 3 (such as a hook by the movable core 13). ), And an extra step of cutting the projections and the like after molding is not required. Accordingly, molding can be performed efficiently, and productivity can be improved, so that cost reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a cuff of a sphygmomanometer.

FIG. 2 is a cross-sectional view of a main part showing a mold clamping state of a mold.

FIG. 3 is a sectional view of a main part showing a state in which a fixed-side auxiliary mold body of a mold is slid in a side direction of the fixed-side mold body.

FIG. 4 is a cross-sectional view of a main part showing a state where a movable mold body and a core of a mold are moved forward with respect to a fixed mold body together.

FIG. 5 is a cross-sectional view of a main part showing a state where a movable-side mold body of a mold is separated from a core.

FIG. 6 is a sectional view of a main part showing a state where a movable core is pulled out from a movable side mold body of a mold.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Arm band 2 Spiral part 3 Core body 4 Air bag 5 Mounting leg piece 6 Mounting leg piece 7 Air inlet 8 Fixed side body 9 Movable side body 10 Fixed side auxiliary body 11 Core 12 Movable side auxiliary body 13 movable core 14 guide pin 15 stopper 16 cavity 17 cavity 18 cavity 19 hook part 20 protruding pin 21 hole

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C017 AA08 AC01 AD01 AD18 EE01 FF08

Claims (2)

[Claims] 1. A fixed-side mold body 8, a movable-side mold body 9 movable forward with respect to the fixed-side mold body 8, and a fixed-side auxiliary mold body 10 slidable in a side direction with respect to the fixed-side mold body 8. And a movable core 13 which can be pulled out from the movable side mold body 9 and a core 11 arranged inside the movable core 13, a cavity 16 forming the core body 3 and a cavity 17 forming the mounting leg piece 5 are formed. A mold provided so as to communicate with the mold is formed, and the molten resin is injected into the cavities 16 and 17 of the mold and solidified by cooling, so that the cross-sectional shape of the mounting leg 5 is cylindrical or spiral. The core body 3 is formed into a curved shape, and then the fixed-side auxiliary mold body 10, whose leading end is inserted between both ends of the core body 3, is slid in the side direction to thereby form both ends of the core body 3. After the fixed-side auxiliary mold body 10 escapes from between the By moving the movable-side mold body 9 forward, one side portion of the core body 3 escapes from the fixed-side mold body 8, and after the core 11 is stopped, the movable leg 13 attaches the mounting leg piece 5. The movable side mold body 9 in the hooked state
Is pulled forward to pull the core body 3 so that the core body 3
The core 11 escapes from the inside of the center core body 3 to the outside while elastically deforming the both ends of the core body 3 and then opening.
A method for manufacturing a core in a cuff of a sphygmomanometer, wherein the movable core 13 is pulled out of the movable core 13 and the core body 3 is protruded from the movable mold body 9 by a protruding pin 20. 2. A fixed-side mold body 8, a movable-side mold body 9, a fixed-side auxiliary mold body 10, and a core 11 for forming a cavity 16 having a cross-sectional shape curved into a cylindrical shape or a spiral shape. A movable core 13 for forming a cavity 17 communicating with the cavity 16 together with the side mold body 9
In the mold clamping state, the molten resin is injected into the cavities 16 and 17 and solidified by cooling, so that the core body 3 and the mounting leg 5 can be integrally formed in each cavity. In addition, the fixed-side auxiliary mold 10 is slidable in the side direction with respect to the fixed-side mold 8 so that the fixed-side auxiliary mold 10 can escape from between both ends of the molded core body 3. Core body 3
Of the core 1 so that one side of the
1 and the movable-side mold body 9 can be moved forward with respect to the fixed-side mold body 8, and the core 11 is opened from the inside of the core body 3 while opening both ends of the molded core body 3 by elastic deformation. The core 11 can be stopped so that it can escape to the outside, and the movable side mold 9 can be moved forward with respect to the core 11 while the mounting leg 5 is hooked by the movable core 13 and the core body 3 is pulled. None, furthermore, the movable core 13 can be pulled out from the movable side mold body 9 so that the hook on the mounting leg piece 5 can be released, and the core body 3 can be protruded from the movable side mold body 9 by a protruding pin 20. An apparatus for manufacturing a core in a cuff of a sphygmomanometer, comprising: