JP6714965B2 - Flexible rod-shaped body and manufacturing method thereof - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bendable rod-shaped body having a rod-like shape such as a columnar body or a cylindrical body, and a method for manufacturing the same.

More specifically, it has a predetermined flexural rigidity, lateral compressive force, and resistance to deformation (load resistance) in any of the up, down, left, and right directions, and enables bending at any part. In addition, it can be easily transferred (moved) to the bent part, and the angle of the bent part can be freely changed. The present invention relates to a flexible rod-shaped body and a method for manufacturing the same, which are applied to a partition device and an accordion type device, a curtain rail that can be arbitrarily bent, a lighting device that facilitates movement of a light source, a medical instrument, a vehicle part, and the like.

Conventionally, as disclosed in Patent Document 1, as a flexible member that receives a product load, there are a post parallel moving device using a rigid strip, a partition device using the same, and an accordion type device. .. In addition, there is a pleat screen (parallel movement device) using a bellows-type bending member.

That is, in Patent Document 1, a scissor link mechanism in which a plurality of sets of link mechanisms in which a pair of link bars are connected in a sandwiched manner is connected between the first post and the second post is interposed flexibly, The upper ends of link bars located at both ends of the scissors link mechanism are fixed to the first post and the second post, and the lower ends of link bars located at both ends of the scissor link mechanism are attached to the first post and the second post. It supports slidably.

In addition, the first post and the second post are connected so that they can approach and separate from each other, and a bendable rigid strip is laid over the first post and the second post above the scissor link mechanism. A bending guide member is disposed on each of the first and second posts, and both side portions of the rigid strip can be bent and stored inside the first post and the second post by the guide of the bending guide member. A plurality of guide shafts are slidably provided on the rigid strip, and each guide shaft is fixed to an upper connection point of the link mechanism, and a post parallel moving device inserted at the lower connection point of the link mechanism. Is composed of.

Further, sheet materials such as pleated screens and curtains are arranged on both sides of the scissor link mechanism and the rigid strip of the parallel moving device, and both end portions of the pair of sheet materials are used as the first post and the second post. There is a partition device that uses a post parallel moving device that is provided between the pair of sheet fabrics and the rigid strip body while interposing the sheet fabric holding means therebetween.

The sheet material holding means includes a plurality of connecting plates that are installed between the upper portions of the pair of sheet materials while being inclined with respect to the axial direction of the rigid strips, and a plurality of slidably supported by the rigid strips. A partition device in which the guide shaft is vertically hung from the runner, and a guide portion is projectingly provided on an upper portion of the runner, and the connecting plate is swingably supported by the guide portion. There is.

Further, the partition device is arranged between a pair of opposing side walls, a guide rail is installed between the upper portions of both side walls, and a roller for rolling the guide rail is installed at the upper ends of the first post and the second post. An accordion type device using a partition device in which the pair of seats can be opened and closed by wearing and moving the first post and the second post along the guide rails.

JP, 2007-321421, A

As described above, in Patent Document 1, as a rigid strip member is defined as a member that can be stored in the left and right posts that receive a product load, a simple R-shaped spring member is used to form an R surface (curved convex surface). Is a strip that is set as the upper surface.

This simple R-shaped rigid strip has no equal endurance against lateral compressive force and load from below, and since it receives the product load without bending, the support pitch of the rigid strip is It is a structure that cannot take large.

In addition, the pleat screen door (parallel movement device) is a bellows-type bending member that bends and is housed in one of the right and left poles for moving the bellows-type pleat screen door in parallel. It is a thing.

Therefore, the bellows has a structure that functions only when it is placed on a flat surface, and it is not possible to realize a self-standing left and right pole parallel moving device. In addition, there is one in which a simple R-shaped spring member is used for the horizontal pull pleat screen, but the problem is the same as in the case of Patent Document 1 above.

Therefore, the present invention was created in view of the above existing circumstances, and has higher flexural rigidity (second moment of area) as compared with a simple R-shaped strip, and has vertical, horizontal, and lateral directions. Sufficient deformation strength is given to each compressive force in the direction, bending with any member is possible, and the bending part can move (transfer) freely along the longitudinal direction of the rod-shaped body. It is an object of the present invention to provide a freely bendable rod-shaped body and a method for manufacturing the same, in which the bending angle of a bent portion can be arbitrarily set.

The invention according to claim 1 according to the present invention comprises one or a plurality of upper and lower rigid strips 1 (1A, 1B) each curved in the width direction with a predetermined curvature formed by overlapping curved end portions, and this rigidity. The band 1 (1A, 1B) is inserted and heat- shrinked in the radial direction, so that the rigid band 1 (1A, 1B) is covered in close contact with the heat-shrinkable tube . The structure described above has solved the above-mentioned problems.

According to the bendable rod-shaped body of the first aspect, one or more upper and lower rigid strips 1 (1A, 1B) curved in the width direction with a predetermined curvature are formed by overlapping the curved end portions. Therefore, as compared with a simple R-shaped strip, it is possible to increase the flexural rigidity (second moment of area) and to impart sufficient deformation strength to the vertical, horizontal, and lateral compression forces.

Further, any portion of the rigid strip 1 (1A, 1B) can be freely bent, and the bent portion 3 can be moved (transferred) along the rigid strip 1 (1A, 1B). The bending angle of can be freely changed, and a shape memory function of restoring the original shape when released from an external force can be added.

According to a second aspect of the present invention, a belt weight is provided in which the curved end portions of one or a plurality of upper and lower rigid strips 1 (1A, 1B) curved in the width direction having a predetermined curvature are superposed and closely attached to each other. And a film coating step P2 in which the rigid band after polymerization is coated with a flexible film made of synthetic resin , and a heat shrinkable tube is used as the flexible film. The above-mentioned problem was also solved by further including a heat shrinking step P3 in which the rigid strip after the step is heated to a predetermined temperature and the flexible film is thermally shrunk to be brought into close contact with the rigid strip .

According to the method for manufacturing a bendable rod-shaped body of the present invention, the bendable rod-shaped body can be formed in an extremely short time by the three steps of the band polymerization step P1 , the film coating step P2 , and the heat shrinking step P3. It can be manufactured at low cost. Further, in the heat shrinking step P3, the flexible film 2 such as so-called shrink wrapping is thermally shrunk and brought into close contact with the rigid strip 1 (1A, 1B), so that a bendable rod-shaped body having high coating retention performance can be easily manufactured. can do.

Specifically, the flexible film 2 is, for example, a heat-shrinkable tube (heat treatment temperature 100 to 200° C.) made of a synthetic resin such as a polyolefin/polyvinyl chloride/fluorine-based polymer or a thermoplastic elastomer. Trademark)" is used. This is an application of the shape memory effect of plastics based on a crosslinking reaction by electron beam irradiation (intermolecular bond reaction by collision of accelerated electrons), and is a tube that shrinks in the radial direction by heating. This makes it possible to obtain properties such as improved heat resistance and weather resistance, shape memory function, and improved oil and chemical resistance.

INDUSTRIAL APPLICABILITY The present invention is capable of freely bending such as an aluminum pipe (diameter 9 to 11 mm, thickness 1 mm), the bending portion 3 can be moved (transferred), the bending angle can be freely changed, and the external force can be released. It has the same effect as the shape memory function that restores the original shape at the point of time.

That is, the bendable rod-shaped body according to the present invention has higher flexural rigidity (second moment of area I) than that of a simple R-shaped band, and is sufficient for vertical, lateral, and lateral compressive forces. Can be bent by any member, and the bent portion 3 can be freely moved (transferred) along the longitudinal direction of the rod-shaped body. In addition, the bending angle of the bent portion 3 can be changed. It can be set arbitrarily.

More specifically, in the post parallel moving device, the partition device using the same, and the accordion type device shown in Patent Document 1 described above, the rigid strip that receives the product load is not replaced by the bendable rod-shaped body of the present invention. It is structurally easy, and by replacing it, the support pitch can be tripled or more, and the bending durability can be improved (5 to 10 times or more), and it can be provided to the market as an inexpensive product. ..

Further, products such as a post parallel moving device and a partition device and an accordion type device using the post shown in Patent Document 1, and a self-standing parallel moving device in which a scissor link mechanism is not provided between the first post and the second post. A device such as a curtain door screen pleats with a partition door that allows parallel movement of both posts by interlocking the other ends of the flexible rods with cords. When used as a combination with various screen forms, the resistance load when stored in both the self-supporting posts should be about 200 to 300 g, and the bending durability should be 50,000 times of opening and closing of the product. You can

It is explanatory drawing which shows the outline of the manufacturing process of the bendable rod-shaped body in one embodiment of this invention. Similarly, it shows an outline of the manufacturing process of the flexible rod-shaped body, (a) is a perspective view of a state in which the end portions of the upper and lower rigid strips are superposed and adhered to each other, and (b) is a diagram after polymerization. Is a perspective view of a state in which a flexible film is covered and adhered to the rigid strip of FIG. 3, and (c) is a perspective view of a state in which the rigid strip after film coating is heated to shrink the flexible film. is there. In FIG. 4, (a) to (c) are principle explanatory diagrams showing the relationships among the second moment of area, the amount of bending, the load, the longitudinal elastic modulus, and the like. It is sectional drawing which shows the structure of a flexible rod-shaped body. FIG. 6 is a perspective view showing a state in which a bendable portion of a bendable rod-shaped body is transferred in the front-back direction. It is a side view of a state in which a bending portion of a bendable rod-shaped body is moved by a bending guide roller. It is a schematic explanatory view at the time of applying the flexible rod-shaped body in one embodiment of the present invention to a post parallel moving device, a partition device using the same, and an accordion type device. FIG. 9 is a schematic explanatory view according to another example of the case where the flexible rod-shaped body according to the embodiment of the present invention is applied to a post parallel moving device, a partition device using the same, and an accordion type device.

An embodiment of the present invention will be described below with reference to the drawings.

<Embodiment>
As shown in FIGS. 1 and 2, the method for manufacturing a bendable rod-shaped body according to the present invention includes an upper rigid strip 1A and a lower rigid strip 1B curved in a width direction with a predetermined curvature. A band polymerization step P1 (see FIGS. 1 and 2A) in which the curved concave surfaces are opposed to each other and the curved ends are overlapped with each other, and the rigid band 1 (1A, 1B) after polymerization is made of synthetic resin. A film coating step P2 (see FIGS. 1 and 2B) for coating the flexible film 2 and heating the rigid strip 1 (1A, 1B) after film coating to a predetermined temperature, for example, 100 to 200° C. The heat-shrinking step P3 (see FIGS. 1 and 2C) in which the flexible film 2 is heat-shrinked and brought into close contact with the rigid strip 1 (1A, 1B).

Through these steps, a bendable rod-shaped cylindrical body, that is, a bendable rod-shaped body having a bendable bendable substantially elliptical pipe structure is manufactured.

As the rigid strip 1 having another structure, a plurality of upper rigid strips 1A are stacked to form a plywood, and a plurality of lower rigid strips 1B are stacked to form a plywood. It is also possible to have a structure in which the curved end portions are opposed to each other and the curved end portions are superposed and closely attached.

As the flexible film 2, for example, a heat-shrinkable tube (heat treatment temperature of 100 to 200° C.) made of synthetic resin such as polyolefin/polyvinyl chloride/fluorine-based polymer and thermoplastic elastomer is used. As a specific heat-shrinkable tube, there is "Sumitube (registered trademark)".

This is an application of the shape memory effect of plastics based on a crosslinking reaction by electron beam irradiation (intermolecular bond reaction by collision of accelerated electrons), and is a tube that shrinks in the radial direction by heating.

In the film coating step P2, upper and lower rigid strips 1 (1A, 1B) in which curved ends of the cylindrical flexible film 2 made of the heat-shrinkable tube are made to face each other so that their curved concave surfaces face each other. Is inserted, and the flexible film 2 is thermally shrunk (reduced in diameter) in the inner diameter direction in the heat shrinking step P3 to be closely attached to the rigid strip 1 (1A, 1B).

In general, as shown in FIG. 3 (a), the lateral width L, and the case of a flat rigid band body 1 in the thickness b, the moment of inertia of I = (1/2) Lb ^3.

Further, as shown in FIG. 3B, a cross-section having a thickness b, an inner diameter d in the major axis direction from the center, an inner diameter c in the minor axis direction from the center, and an outer diameter a in the minor axis direction from the center In the case of the rigid strip 1 having the elliptical pipe structure, the second moment of area I=(π/4)(a ³ b−c ³ d).

Further, as shown in FIG. 3C, the overall width L (mm), the load w (kg) per 1 (mm), the longitudinal elastic modulus E (kg/mm ² ), the moment of inertia I (mm ⁴ ) of area The maximum value of the bending amount δ (mm) of the flat plate-shaped rigid strip 1 is δmax=5wL ⁴ /384EI (mm). Incidentally, the longitudinal elastic modulus of hard steel is E=21000 (kg/mm ² ), and the longitudinal elastic modulus of aluminum is E=6300 to 7500 (kg/mm ² ).

The quality determining element of the bendable rod-shaped tubular body of the present embodiment, that is, the bendable rod-shaped body having a bendable bendable substantially elliptical pipe structure, includes bending rigidity, bending durability, and bending portion transition (movement) resistance. Determined by a minimum of four required requirements: (load) and appearance (including changes over time).

Specifically, as shown in FIG. 4, the quality of the bendable rod-shaped body is defined by the thickness t1 (mm) of the rigid strip 1, the lateral width L (mm) of the rigid strip 1, and the predetermined value of the rigid strip 1. It is determined by the height h (mm) when curved in the width direction due to the curvature, the thickness t2 (mm) of the flexible film 2, and the value of the tensile tension of the rigid strip 1.

That is, if the flexural rigidity is to be increased, the value of h/L may be increased and the thickness t1 of the rigid strip 1 may be increased. There is a possibility that cracks may occur at the curved end of the rigid strip 1 due to metal fatigue due to repeated flattening/restoration at that time, and the crack may grow and break.

Moreover, the bending durability is significantly reduced, and the resistance of the bent portion 3 to transfer (movement) is increased, which is an obstacle to the operation.

Further, regarding the quality of the flexible film 2, if the curved end portions of the upper and lower rigid strips 1 (1A, 1B) are bent and bent while being in close contact with each other, the flattened state and the restoration are repeated. Due to the extremely small difference in curvature of the rigid strip 1 (1A, 1B), the contact portion of the curved end portion is displaced, so that the flexible film 2 has proper hardness and wear resistance. Required.

Also, an appropriate thickness is required to protect the curved end where cracks occur. In addition, in order to allow a slight deviation of the curved ends that come into contact with each other, appropriate lubricity is required between the flexible film 2 and the upper and lower rigid strips 1 (1A, 1B).

In the bending test according to the present embodiment, silicon grease or silicon oil is applied to the upper and lower rigid strips 1 (1A, 1B) before the heat treatment in the heat shrinking step P3.

A simple R-shaped strip is easily deformed by a lateral compressive force and a load from below. However, the geometrical moment of inertia I of the simple R spring and the rod-shaped cylindrical body (pipe) using this R spring is so high that it cannot be compared.

That is, the rod-shaped tubular body can obtain high flexural rigidity, and the quality and performance of the rod-shaped tubular body (pipe having a substantially elliptical cross section) are as follows: thickness t1, lateral width L, curved height h, It can be arbitrarily set depending on the thickness t2 of the flexible film 2 and the number of used sheets.

In the post parallel moving device, the partition device and the accordion type device using the post parallel moving device shown in Patent Document 1 described above, the rigid strip that receives the product load is replaced by the bendable rod-shaped body of the present invention, which is more durable and more durable. In order to make the performance inexpensive, for example, the thickness t1 of the rigid strip 1=0.10 to 0.15 (mm), the lateral width L of the rigid strip 1=20 to 25 (mm), The height h of the rigid strip 1 is preferably 5 to 8 (mm), and the thickness t2 of the flexible film 2 is preferably 0.2 to 0.4 (mm).

The flexible film 2 is preferably polyolefin/polyvinyl chloride, and the number of the rigid strips 1 used is 1 to 2 for the upper rigid strip 1A and 1 for the lower rigid strip 1B. preferable.

When the specifications of the rigid strip 1 and the flexible film 2 are determined in this way, as shown in FIG. 5, the bendable rod-shaped body is bendable and the cross section of the bent portion 3 becomes flat, and the front-back direction is along the rod-shaped body. It is possible to move freely in any direction. Moreover, the front and rear cross-sections are restored to a substantially elliptical shape through the bent portion 3 to obtain straightness.

As shown in FIG. 6, depending on the product, the bending guide roller 4 is used to enable the transfer (movement) of the bending portion 3. For example, the post-translating device for a post disclosed in Patent Document 1, the partition device using the post, and the accordion type device (see FIG. 7) are used as a bendable member for receiving a product load. When using a scissors link mechanism 7 (panter structure) interposed between the first post 5 and the second post 6, as shown in FIG. 7(a) or FIG. 7(b), The bendable rod-shaped body of the present embodiment is bridged over the position, and the bending guide rollers 4 are arranged on the first post 5 and the second post 6, respectively, and the bendable rod-shaped body is guided by the bending guide member. Both sides can be flexibly stored inside the first post 5 and the second post 6. As a result, the flexural performance of the distributed load can be improved about 5 times or more as compared with the conventional R spring, and the durability equivalent to that of the aluminum pipe can be obtained with respect to the lateral compression force.

In addition, as shown in FIG. 7C, the flexible rod-shaped body (rigid band) of the present embodiment is added to the self-standing parallel movement device in which the scissor link mechanism 7 is not provided between the first post 5 and the second post 6. When the body 1 and the flexible film 2) are used, the bendable rod-shaped body of the present embodiment arranged in the first post 5 and the second post 6 vertically between the posts 5 and 6 is used. Each one end is fixed to the first post 5, and the other ends of the bendable rod-shaped bodies are housed via the bending guide rollers 4 arranged vertically in the second post 6.

Then, the other ends of the bendable rod-shaped body are interlocked by the cord tension, so that the posts 5 and 6 can be moved in parallel. Since the scissors link mechanism 7 is not provided between the first post 5 and the second post 6 as described above, when the flexible rod-shaped body is used as a patition door or the like, the scissors link mechanism 7 is provided before and after the scissors link mechanism 7. It is not necessary to prepare double screen materials, and it is possible to combine with various screen forms (for example, partition or door) such as single curtain roll screen pleats and honeycomb structure pleats. Further, it can be applied as a hanging device for clothes, blankets, cloths, etc., and also as a moving device for lighting equipment.

In addition, as shown in FIG. 8, the bendable rod-shaped body (the rigid strip 1 and the flexible body 1 and the flexible strip) of the present embodiment, which is vertically arranged between the first post 5 and the second post 6, between the posts 5 and 6. Both ends of the flexible film 2) are guided into the posts 5 and 6 via the bending guide rollers 4, and the ends of the bendable rod-shaped body are bendable by cord tension in the posts 5 and 6. By interlocking the movements of the first post 5 and the second post 6 of the rod-shaped body with the approach and separation, and fixing either one of the first post 5 and the second post 6 to the wall surface, the pillar, etc. The parallel movement of the first post 5 and the second post 6 can be enabled.

The bendable rod-shaped body according to the present invention is used as a parallel moving device for a post, a partition device using the same, and an accordion type device as an opening/closing moving method, and a hanging device for clothes, blankets, cloths, and the like, for example. Alternatively, it is widely used as a moving device for lighting equipment, and further as medical equipment, vehicle parts, and the like.

P1... Strip polymerizing step P2... Film covering step P3... Heat shrinking step I... Second moment of area t1... Rigid strip thickness t2... Flexible film thickness L... Rigid strip lateral width h... Curved Height of rigid strip δ... Deflection amount 1... Rigid strip 1A... Upper rigid strip 1B... Lower rigid strip 2... Flexible film 3... Bending part 4... Bending guide roller 5... First post 6... 2nd post 7... Scissor link mechanism

Claims (2)

One or a plurality of upper and lower rigid strips curved in the width direction with a predetermined curvature formed by overlapping the curved end portions, and the rigid strips are inserted and thermally contracted in the radial direction. A bendable rod-shaped body characterized by having a structure of a rod-shaped tubular body that is bendable by a heat-shrinkable tube that is tightly covered with a rigid strip . A band polymerizing step of superposing the curved end portions of one or more rigid strips each having a predetermined curvature in the width direction on the upper and lower sides, and flexibility of synthetic resin on the rigid strips after polymerization. A film coating step of coating the film ,
Using a heat-shrinkable tube as the flexible film, heating the rigid strip after the film coating step to a predetermined temperature to heat-shrink the flexible film to bring it into close contact with the rigid strip. A method for manufacturing a bendable rod-shaped body, comprising:

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