JP5905855B2 - Bicycle tube and manufacturing method thereof - Google Patents

Description

The present invention relates to a bicycle tube and a method for manufacturing the same, and more specifically to a single-letter tube that is easy to replace and repair, and is not an existing round tube attached to a bicycle.

The bicycle includes a set of two wheels 20, each wheel including a wheel 22 and a tire 24, and each tire 24 includes a tube 28 having a buffering effect against the ground. The tube 28 is formed of a rubber material, and when compressed air is injected from the valve 30, the tube 28 swells into an integral donut structure that is not separated in one section. However, since such a tube 28 has an integral donut structure that cannot be separated from one section as shown in FIG. 1, its manufacture is not easy in the rubber molding process. There is a disadvantage of not. Moreover, it is not easy to attach the tube 28 to the bicycle due to its structural weakness that is an integral type. Furthermore, when the tube 28 attached to the bicycle is torn and internal air leaks, when the tube 28 is separated from the bicycle wheel for repair, the bicycle frame on which the wheel is attached is separated from each other before the tube is attached. Since it has to be repaired, there is a drawback that the work is very complicated. In FIG. 1, 22a is a hub, 22b is a rim, 22c is a spoke, and 22d is a groove line.

In order to solve this problem, as shown in the prior art document, a bicycle tube with an end rather than an annular shape has been proposed, but a bicycle tube with an end that can be reliably manufactured and used without problems has been realized. I have to say that it is not.

Japanese Utility Model Publication No. 7-5809 Special table 2013-505868 gazette

The present invention was created in consideration of the above-mentioned problems, and is a single-letter tube that keeps the both ends of the long tube extending in the length direction facing each other in a round shape. Provided is a one-letter-shaped bicycle tube that can be easily replaced and repaired without removing the rim at the time of tube replacement, and is convenient for assembly and disassembly without using a tool from the bicycle rim, and a method for manufacturing the same. For the purpose.

The present invention has a body tube having both ends opened, having a predetermined length, and having end portions on both sides constituting an internal space in a hollow portion;
It has both ends, has a predetermined length shorter than a predetermined length of the main body tube, and constitutes an internal space in the hollow portion, and is bonded to the end portion on either side of the main body tube. A first stage tube;
It has both ends, has a predetermined length shorter than the predetermined length of the main body tube, and forms an internal space in the hollow portion, and is bonded to the end portion on the other side of the main body tube. A second stage tube,
Each of the first-stage tube and the second-stage tube includes an end closing means in which one of the ends is closed, and the other end of the both ends is There is provided a bicycle tube that is open and has the other open ends of the first-stage tube and the second-stage tube connected to and bonded to both ends of the main body tube, respectively.

Preferably, each of the first-stage tube and the second-stage tube has a bottomed cylindrical shape in which a cylindrical portion having one end opened and a bottom portion provided at the other end are integrally formed. The bottom can be implemented as the end closing means.

Further, the end closing means may be formed by adhering a rubber cap to either one of the both ends of the first stage tube and the second stage tube. Thereby, when it mounts | wears with a rim, rubber caps contact | abut and the position of the both ends of a tube is stabilized.

The end closing means can be implemented as a circular rubber cap adhered in a state where the hollow portions of the first-stage tube and the second-stage tube are held in a circle. Accordingly, the rubber cap can be bonded to each of the first-stage tube and the second-stage tube in a state close to a state where air is put in the tube.

Further, the end closing means includes a circular rubber cap bonded to either one of the both ends of the first stage tube and the second stage tube, the first stage tube, and the first stage tube. The hollow portion of each of the first-stage tube and the second-stage tube is provided with either one of the two ends of the two-stage tube and an adhesive toluene applied to one surface side of the rubber cap. A metal rod for inducing internal expansion is inserted, the other side of the rubber cap is inserted into a crimping cylinder, and one of the ends of the first-stage tube and the second-stage tube is inserted. The rubber cap may be heated and pressurized so that the rubber cap is adhered thereto.

Further, the opened ends of the first-stage tube and the second-stage tube may be bonded to both ends of the main body tube and bonded by vulcanization. By these, a favorable tube can be produced by a simple process.

The present invention also includes a step of manufacturing a body tube having an internal space in the hollow portion that is open on both sides by cutting the hollow tube at a predetermined length;
A cylindrical first-stage tube having a predetermined length shorter than that of the main body tube and having an internal space in a hollow portion in which one end portion is closed and the other end portion is opened. Manufacturing a two-stage tube;
A step of adhering one of the opened ends of the main body tube and the other opened end of both ends of the first-stage tube and the second-stage tube by heating and pressurization;
A bicycle tube manufacturing method is provided.

In this manufacturing method, the first-stage tube and the second-stage tube are formed into a bottomed cylindrical shape in which a cylindrical portion having one end opened and a bottom portion provided at the other end are integrally formed. You may make it do.

In addition, by dissolving and pressurizing either one of the ends of the first-stage tube and the second-stage tube and the rubber cap surface bonded to this end with a solvent such as toluene, It includes a closed finishing process by adhering either one of the ends of the first stage tube and the second stage tube and a rubber cap, and the closed finishing process includes the first stage tube and After inserting a metal rod into each of the hollow portions of the second stage tube, the solvent is applied to the end portion of the one end portion and the rubber cap, and the end portion and the rubber are pressed by pressurizing the crimping cylinder. The cap and the cap may be bonded together.

Further, the bonding step includes the step of opening one end portion of the main body tube and the other opening end portion of both ends of the first stage tube and the second stage tube. Alternatively, they may be placed facing each other by a joint machine, and the end surfaces of the end portions of each other are aligned and bonded by heating and pressing.

The present invention has an effect that installation and disassembly can be conveniently performed without using another tool from a bicycle rim without disassembling the rim at the time of tube replacement with a single-letter tube.

The disassembled perspective view which showed the conventional tonut-shaped bicycle tube. (A) is the side view of the bicycle tube which concerns on embodiment of this invention, (b) is the side view which divided | segmented the main body tube of the bicycle tube, the 1st step tube, and the 2nd step tube. The disassembled perspective view which showed the structure for closing the end of the 1st step tube and the 2nd step tube of the bicycle tube. (A) The perspective view which showed the structure for closing the same end, (b) The perspective view of the 1st step tube and the 2nd step tube of the state which closed the same end. (A) The side view which showed the pre-process which adhere | attaches the main body tube of the bicycle tube, the 1st step tube, and the 2nd step tube, (b) The main body tube of the bicycle tube, the 1st step tube, and 2nd The side view which showed the post process which adhere | attaches a corrugated tube. The perspective view of the bicycle tube. Side view showing the relationship between the bicycle tube and the rim. The block diagram which showed the bicycle tube manufacturing method which concerns on embodiment of this invention. The manufacturing process of the 1st step tube and 2nd step tube of the bicycle tube which concerns on other embodiment of this invention is shown, (a) Sectional drawing of a front process, (b) Sectional drawing of a post process.

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

The present invention can be variously modified and has various forms. Hereinafter, specific embodiments will be described in detail with reference to the drawings. However, this should not be construed as limiting the present invention to the specific embodiments, but includes all alternatives and modifications included in the spirit and technical scope of the present invention. In describing each drawing, reference numerals have been used for similar components.

The terms first, second, etc. are used to describe various components, but the components are limited by the terms and should not be understood. The above terms are used to distinguish one component from another. For example, the first component may be named as the second component as long as it is not excluded from the rights of the present invention, and the second component may also be named as the first component.

The terminology used in this application has been used only to describe specific embodiments and is not intended to limit the invention. The expression “a” or “an” includes a plurality of expressions unless the context clearly indicates otherwise. In this application, terms such as “include” or “have” indicate that there exists a feature, number, step, action, component, part, or combination thereof described in the specification. It should be understood that it does not exclude in advance the existence or additional possibilities of one or more other features or numbers, steps, operations, components, components or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by those with ordinary skill in the art to which this invention belongs. It has something. Commonly used terms that are the same as defined in the dictionary should be construed to have meanings that are consistent with those in the context of the related art. Unless explicitly defined in this application, it should not be construed as an unusual or overly formal meaning.

A bicycle tube according to an embodiment of the present invention is a long tube in the length direction, and is a single-letter tube that is configured so that the ends of both parts maintain a circular shape. It is easy to replace without separating the rim, and can be conveniently assembled and disassembled without using a separate tool from the bicycle rim.

Here, when describing the one-letter tube of the present invention, both sides of the tube are closed in order to inject air into the tube opened on both sides. Even when air is not injected, the circular shape is maintained, and the ends of the tube coincide with each other when the air is injected and attached to the rim, so that the ends of both ends of the tube are closed.

Referring to FIGS. 2 and 5, a single-character bicycle tube that can be an embodiment of the present invention includes a body tube 110, a first stage tube 120, a second stage tube 130, an end closing means, and a tube bonding means. And a single letter tube 150.

In general, a bicycle tube has a tube shape with a valve attached with raw rubber. The raw rubber tube is placed in a mold, compressed air is injected from a valve, and heating is performed while applying pressure in the mold to perform a vulcanization treatment, thereby completing a bicycle tube. In the following description, the processing of a raw material tube containing raw rubber as a main component will be mainly described. When simply referred to as “tube”, “unvulcanized raw material tube” means in principle.

First, a tube having a shape that is open on both sides and is long in the length direction is cut into a length of 10 cm from both ends, and the main tube 110 that is long in the length direction and the first-stage tube 120 that is 10 cm in length and the first tube 120. A two-stage tube 130 is formed. It should be noted that the body tube 110, the first stage tube 120, and the second stage tube 130 can be cut out from separate tubes, and the forming method is not particularly limited. Absent.

The main body tube 110 is open at both ends and has a predetermined length. In the above example, the length is about 20 cm, which is the total length of the first-stage tube 120 and the second-stage tube 130, as compared with a normal annular tube.

The main body tube 110 has a single letter shape having a hollow inner space. The main body tube 110 is not limited to an annular body such as a donut having no end portion, but may be one having both ends, and may be a C-shape formed in a circular arc shape in advance.

More specifically, the unvulcanized tube may be linear or curved, and this may be placed in a linear mold to obtain a straight vulcanized tube, which is a conventional annular mold. You may make it obtain the tube after curving of the curvilinear shape put in the inside and formed in C shape etc. with the end.

The first-stage tube 120 and the second-stage tube 130 configured separately from the main body tube 110 are open on both sides, have a predetermined length, and constitute an internal space in the hollow portion.

In other words, the first-stage tube 120 is open at both sides, has a predetermined length, forms an internal space in the hollow portion, and is bonded to one of the ends of the main body tube 110. The second stage tube 130 is open at both sides, has a predetermined length, forms an internal space in the hollow portion, and is bonded to either one of the ends of the main body tube 110.

In this example, the main body tube 110, the first-stage tube 120, and the second-stage tube 130 are each a straight or curved single-letter shape, and the main-body tube 110, the first-stage tube 120, the second-stage tube 130, A single-letter-shaped tube 150 is formed by adhering to a straight or curved single-letter shape.

As described above, both ends of the first tube 120 and the second tube 130 are closed before connecting the main tube 110, the first tube 120, and the second tube 130 into a single character. To do. The first stage tube 120 and the second stage tube 130 are finished by end closing means for closing both ends thereof.

The end closing means is to bond and finish the end of one end of the first stage tube 120 and the second stage tube 130 at the end closing part such as the rubber cap 140. To do.

The rubber cap 140 has a round circular shape. The rubber cap 140 may be a circular planar disk-shaped body, or may be formed by integrally forming a disk-shaped body and a short cylindrical body extending from the outer periphery thereof.

The end closing means includes a first stage tube 120 and a second stage tube 130, a rubber cap 140, a metal rod 162, toluene 164 which is a solvent type adhesive, and a crimping cylinder 166.

The metal rod 162 has a predetermined diameter inserted into the first-stage tube 120 and the second-stage tube 130 and has a predetermined length. The metal rod 162 is inserted into the hollow portion of the first-stage tube 120 and the second-stage tube 130, and has an internal shape for holding the internal shapes of the first-stage tube 120 and the second-stage tube 130 in a substantially circular cross section. It functions as a holding member.

By inserting the first stage tube 120 and the second stage tube 130 into the hollow part from the other end of the both ends of the first stage tube 120 and the second stage tube 130, the first stage tube 120 and the second stage tube 130 can maintain a circular shape. By maintaining this circular shape, the rubber cap 140 can be bonded to one of the ends of the first-stage tube 120 and the second-stage tube 130. Specifically, the circular rubber cap 140 is finished by bonding the end of the one end of the first-stage tube 120 and the second-stage tube 130 into which the metal rod 162 is inserted.

The outer diameter of the metal rod 162 is set slightly larger than the inner diameter of the first stage tube 120 and the second stage tube 130, so that the first stage tube 120 and the second stage tube 130 are expanded from the inside. Although the outer diameter of the metal rod 162 is equal to or slightly smaller than the inner diameter of the first stage tube 120 and the second stage tube 130, the first stage tube 120 and the second stage The tube 130 may be held in a circular shape without expanding.

In this state, adhesive toluene 164 is applied to the end of the one end of each of the first-stage tube 120 and the second-stage tube 130 and one surface of the rubber cap 140. The rubber cap 140 is inserted into the crimping cylinder 166 from the other side, and the rubber cap 140 is adhered and fixed to the end surfaces of the one end portions of the first-stage tube 120 and the second-stage tube 130, respectively. Apply pressure with the crimping cylinder 166 so that

Toluene 164 has an adhesive force that can melt and strongly bond rubber, and is most suitable for this purpose, but it may be another solvent that can melt and bond rubber, and it can be bonded without melting. It may be carried out by changing to another adhesive.

The crimping cylinder 166 has one end of the rubber cap 140 coated with the toluene 164 and the end of the one end of each of the first-stage tube 120 and the second-stage tube 130 coated with the toluene 164. Heat is applied to the surfaces so that they adhere to each other.

Thus, by applying pressure with the crimping cylinder 166, the one end of the first stage tube 120 and the second stage tube 130 is closed by the rubber cap 140, while the first stage tube 120 Of the both ends of the second stage tube 130, the other end is left open.

In this way, each of the first-stage tube 120 and the second-stage tube 130 having one end closed and the other end opened is bonded to the openings at both ends of the body tube 110 by the tube bonding means. A single letter tube 150 is formed.

The tube adhering means connects the opened portions of the first-stage tube 120 and the second-stage tube 130 to both sides of the main body tube 110, respectively, and adheres them.

The tube adhering means is configured such that the end of the opened end of the main body tube 110 and the end of the other opened end of the first stage tube 120 are kept in a straight line while keeping the joint machine 168 facing each other. The placed main body tube 110 and the first stage tube 120 are bonded together by aligning the end surfaces of the end portions and heating and pressing.

In addition, the main body tube 110 is placed in a straight line while the other end portion of the main tube 110 opened and the other end portion of the second stage tube 130 opened are kept facing each other by the joint machine 168. 110 and the second stage tube 130 are bonded together by aligning the end surfaces of the end portions and heating and pressing.

Here, the vulcanization action is performed by applying heat to bond the end surfaces of the open ends of the main body tube 110 and the first stage tube 120 to a machine called a joint machine 168, and fix the hot knife, etc. The end portion is heated and melted by the heating device and is pressed by the fixing portion 169 of the joint machine 168 so that heat and pressure are applied and bonded.

The joint machine 168 includes a fixing portion 169 that fixes the main body tube 110 and the end of the first-stage tube 120 or the second-stage tube 130, respectively. The fixing portion 169 can move in the left-right direction in FIG. As a result, the first-stage tube 120 and the second-stage tube 130 are bonded to both ends of the main body tube 110, respectively, and the single-character tube 150 shown in FIG. 6 is manufactured.

In this way, by assembling the single-character tube 150 whose ends at both ends have a round shape along the fixing groove of the rim 22b, the single-character tube 150 becomes a round tube and is fixed to the bicycle.

On the other hand, the single-character bicycle tube manufacturing method according to the embodiment of the present invention includes the respective steps as shown in FIG.

First, both ends of a single-character tube that is long in the lengthwise direction with both ends opened are cut to a predetermined length. As a result, the body tube 110 having both ends opened and constituting the internal space of the hollow portion is made, and the first stage tube 120 having a predetermined length and having both ends opened to constitute the interior space of the hollow portion Second-stage tubes 130 are respectively produced (S110).

Here, as an embodiment of the present invention, a long first tube 120 and a second tube 130 and a long main tube 110 are cut by cutting a long tube 10 cm from both sides. It is divided into.

Next, the first stage tube 120 is closed at one end by thermally bonding one end of the opened ends with the rubber cap 140 and performing a primary closing process (S120).

The second stage tube 130 is closed at one end by thermally bonding one end of the opened ends with the rubber cap 140 and performing a secondary closing process (S130).

Here, in the closing process of the first-stage tube 120 and the second-stage tube 130, the metal rod 162 is inserted into the hollow portions of the first-stage tube 120 and the second-stage tube 130, respectively, Toluene 164 is applied to the rubber cap 140 and bonded together by pressurization of the pressure-bonding cylinder 166.

The metal rod 162 allows the first-stage tube 120 and the second-stage tube 130 to maintain a round shape, and the round rubber cap 140 can be bonded by maintaining the round shape. . Both steps (S120) and (S130) may be performed separately or simultaneously, and when the first stage tube 120 and the second stage tube 130 have the same size and shape, It is not necessary to distinguish between the two steps (S120) (S130).

Next, the first-stage tube 120 and the second-stage tube 130 whose one end sides are closed by the rubber cap 140 are respectively bonded to both ends of the main body tube 110 (S140) (S150). Specifically, the end on one side of the main tube 110 and the open end of the first tube 120 are fixed to the joint 168 and then bonded by vulcanization ( S140). Similarly, the other end portion of the main body tube 110 and the open end portion of the second-stage tube 130 are bonded to the joint 168 by heating and pressing (S150).

More specifically, the step of adhering the first stage tube 120 to the body tube 110 is a process of joining one end of the body tube 110 opened and the end of the first stage tube 120 opened. The main body tube 110 and the first-stage tube 120, which are arranged so as to face each other by the machine 168 and are placed in a single letter shape, are bonded together by heating and pressurizing action in a state where the above end portions are combined. (S140).

Then, the step of bonding the second stage tube 130 to the main body tube 110 is performed by causing the other end portion of the main body tube 110 opened and the opened end portion of the second stage tube 130 to face each other by the joint machine 168. The main body tube 110 and the second-stage tube 130 placed in a single letter shape are bonded together by heating and pressurizing action in a state where the above-mentioned end portions are combined with each other (S150). Both steps (S140) and (S150) may be performed separately or simultaneously.

The valve 30 for injecting air into the tube (shown only in FIG. 7) is most preferably the main body tube 110, but it may be attached to the first stage tube 120 and the second stage tube 130. Further, the attaching step may be performed by a conventional method in the step of extruding the main body tube 110 in (S110), but the first step tube 120 and the second step tube 130 are bonded to the main body tube 110 in addition to this. It may be before or after.

The unvulcanized bicycle tube completed as described above is placed in a mold according to a conventional method, and is pressurized so as to be pressed against the inner wall in the mold by injecting compressed air from a valve and expanding it. The vulcanization step (S160) is performed by heating under this pressurized state. The mold for treatment in this vulcanization process may be a straight one, or it may be finished into a tube with a substantially C-shaped arc-shaped vulcanized end with a conventional annular mold. Good.

The bicycle tube 150 of the present invention thus completed is endless. Therefore, in order to assemble a round annular tube into the rim 22b as in the prior art, instead of struggling to attach the tube while opening it up and down, left and right, as shown in FIG. 7, along the groove line of the rim 22b, Ended tube 150 such as a single letter can be assembled easily. Therefore, it is convenient for the replacement and repair process and provides time saving.

Next, with reference to FIG. 9, another embodiment of manufacturing the first stage tube 120 and the second stage tube 130 will be described. In the previous example, similarly to the main body tube 110, the first-stage tube 120 and the second-stage tube 130 are also formed as end-cylinders, and the rubber cap 140 is bonded thereto. The tube 120 and the second stage tube 130 are formed as a cylindrical body with a bottom, and the cylindrical portion and the bottom portion are integrally formed.

Specifically, a molding raw material 160 such as raw rubber is injected into a bottomed cylindrical molding female die 161 having a circular cross section of the first stage tube 120 and the second stage tube 130 (FIG. 9A), A cylindrical molding male mold 162 is inserted, the molding raw material 160 is spread in the space between the male and female molds 161, 162, molded and removed from the mold. Thereby, the first-stage tube 120 and the second-stage tube 130 in which the cylindrical section 163 having a circular cross section and the bottom section 164 that closes one end thereof are integrally formed are completed. This bottom portion 164 has a circular shape when viewed from the front, similar to the rubber cap 140 of the previous embodiment, and when the air is introduced into the rim, the bottom portion 164 has the circular shape of the first-stage tube 120 and the second-stage tube 130. When the bottom portions 164 are brought into contact with each other, both tube ends coincide with each other. As a result, it is possible to prevent the two end portions from being displaced or overlapped with each other, and to provide a riding comfort comparable to that of an annular tube. In order for both ends to coincide with each other, the shape of the bottom portion 164 is most preferably circular. However, as long as most of the planar bottom portions 164 are in contact with each other, the bottom portion 164 has many sides that are nearly circular. It may be a substantially circular shape such as a square, and may be chamfered between the cylindrical portion 163 and the bottom portion 164.

In addition, in order to facilitate the removal of the molded first-stage tube 120 and second-stage tube 130 from the mold, a split mold or a slight taper is provided on the molding female mold 161. It is also desirable to do.

The first-stage tube 120 and the second-stage tube 130 after molding are bonded to the main body tube 110 as in the previous example. For this bonding, it is advantageous to use the joint machine 168 described above. This joint machine 168 is a facility that has been used to connect both ends of a tube when manufacturing a conventional annular tube. By using existing facilities, no new capital investment is required. Only by newly producing the male and female molds 161 and 162 for molding, the cost can be prevented from rising. As for the manufacturing process, if the first-stage tube 120 and the second-stage tube 130 are molded, the conventional annular tube is bonded to the one tube by the above-mentioned one-point joint machine 168. In contrast, in the present invention, the first-stage tube 120 and the second-stage tube 130 and the main body tube 110 are bonded at two locations, and only one bonding step is required.

The present invention has been described with reference to the above-described embodiments and drawings. However, the present invention should not be limited by this, and those skilled in the art that belong to the present invention will understand the present invention. It goes without saying that various modifications and changes can be made within the scope of the technical idea and the scope of claims.

Further, in the present invention, since one bicycle tube is manufactured from three of the main tube 110, the first tube 120, and the second tube 130, it should be prepared by devising the material removal. The length of each tube can be reduced.
For example, when manufacturing a 22-inch to 26-inch tube, the following three types of material removal can be performed.

(Specific example 1 of material removal)
An example in which the length of the main tube 110 is changed to make the lengths for the first tube 120 and the second tube 130 constant.
Total length = 1st tube 120 + body tube 110 + 2nd tube 130
22 inch = 4 inch + 14 inch + 4 inch 23 inch = 4 inch + 15 inch + 4 inch 24 inch = 4 inch + 16 inch + 4 inch 25 inch = 4 inch + 17 inch + 4 inch 26 inch = 4 inch + 18 inch + 4 inch

(Specific example 2 of material removal)
An example in which one type of length is prepared for the main body tube 110 and three types of lengths are prepared for the first-stage tube 120 and the second-stage tube 130.
Total length = 1st tube 120 + body tube 110 + 2nd tube 130
22 inch = 3 inch + 16 inch + 3 inch 23 inch = 4 inch + 16 inch + 3 inch 24 inch = 4 inch + 16 inch + 4 inch 25 inch = 5 inch + 16 inch + 4 inch 26 inch = 5 inch + 16 inch + 5 inch

(Example 3 of material removal)
An example of preparing a plurality of types of lengths for the body tube 110 and two types of lengths for the first-stage tube 120 and the second-stage tube 130. In this case, a 22 inch to 27 inch tube can be manufactured.
Total length = 1st tube 120 + body tube 110 + 2nd tube 130
22 inch = 3 inch + 16 inch + 3 inch 23 inch = 3 inch + 17 inch + 3 inch 24 inch = 5 inch + 16 inch + 3 inch 25 inch = 5 inch + 17 inch + 3 inch 26 inch = 5 inch + 16 inch + 5 inch 27 inch = 5 inch +17 inches +5 inches

In this way, the first-stage tube 120 and the second-stage tube 130 are made the same shape or only the lengths of the tubes are different to efficiently produce bicycle tubes of various lengths. can do.

110 Body tube
120 First stage tube
130 Second stage tube
140 Rubber cap
150 One-letter tube
162 Metal rod
164 Toluene
166 Crimp cylinder
168 joint machine
169 Fixed part

Claims (8)

A body tube having both ends opened, having a predetermined length and a substantially constant outer diameter, and having end portions on both sides constituting an internal space in the hollow portion;
It has both ends, has a predetermined length smaller than the main body tube and has a cylindrical portion having the same outer diameter as the main body tube, and constitutes an internal space in the hollow portion of the cylindrical portion , A first stage tube bonded to the end on either side of the body tube;
It has both ends, has a predetermined length smaller than the main body tube and has a cylindrical portion having the same outer diameter as the main body tube, and constitutes an internal space in the hollow portion of the cylindrical portion , A second-stage tube bonded to the end on the other side of the main body tube,
Each of the first-stage tube and the second-stage tube includes a cylindrical portion having one end opened, and an end closing means having a circular planar disk shape provided at the other end of the cylindrical portion. With a bottomed cylinder with
The end closing means constitutes the leading edge of each of the first stage tube and the second stage tube, and there is no other member at the tip of the end part closing means,
When the rim is mounted and air is introduced, the end closing means of the first stage tube and the second stage tube come into contact with each other, and except for the portion bonded to the end of the main body tube. A bicycle tube , characterized in that no other members are present on the inner surface side and the outer surface side of the cylindrical portion . Wherein each of the first stage tube and the second-stage tube, which forms the bottomed cylindrical shape and a bottom portion provided on the tubular portion and the other end of which one end is opened is formed integrally without seam 2. The bicycle tube according to claim 1, wherein the bottom portion is the end closing means. Those wherein each of the first stage tube and the second-stage tube, with said tubular portion whose both ends are opened, the adhesion structure and the end closure of the rubber cap or the like provided on one end 2. The bicycle tube according to claim 1, wherein the bonded end closing portion is the end closing means. The said main body tube is provided with the valve | bulb which inject | pours air in a tube, The said 1st stage tube and the said 2nd stage tube are not equipped with the said valve, The one in any one of Claims 1-3 characterized by the above-mentioned. Bicycle tube. In the method of manufacturing the bicycle tube according to claim 1 or 2,
By cutting the hollow tubes at a predetermined length, step sides to produce the main tube having an internal space in the hollow portion is opened;
Forming the first-stage tube and the second-stage tube by forming the tubular part with one end open and the bottom part provided at the other end into a integrally formed bottomed cylinder ;
Step of adhering either one of the end portions which are opened in the main tube, and the other one of the opened ends of both ends of the first stage tube and the second-stage tube by heat and pressure ;
A bicycle tube manufacturing method including: Characterized in that said first stage tube and said apertured end portion of the second stage tube, and both ends of the main tube, combined respectively, are those having a step of bonding by vulcanization The method for manufacturing a bicycle tube according to claim 5. Cutting the hollow tube at a predetermined length to produce a body tube having both sides open and having an internal space;
A cylindrical first-stage tube having a predetermined length shorter than that of the main body tube and having an internal space in a hollow portion in which one end portion is closed and the other end portion is opened. Manufacturing a two-stage tube;
A step of adhering one of the opened ends of the main body tube and the other opened end of both ends of the first-stage tube and the second-stage tube by heating and pressurization;
Including
The step of manufacturing the first-stage tube and the second-stage tube is to form a bottomed cylinder shape in which a cylindrical portion having one end opened and a bottom portion provided at the other end are integrally formed. ,
One end of either of the first-stage tube and the second-stage tube and a rubber cap surface bonded to the end are melted with the solvent and pressurized, whereby the first stage Including a closed finish processing step by adhering either one of the ends of the tube and the second stage tube and the rubber cap;
In the closed finishing process, a metal rod is inserted into each of the hollow portions of the first-stage tube and the second-stage tube, and then the solvent is applied to the end portion of the one end portion and the rubber cap. The bicycle tube manufacturing method characterized in that the end portion and the rubber cap are bonded together by pressurization of the crimping cylinder. The adhering step includes joining the end of the one end of the main body tube, and the other end of the first stage tube and the second stage tube. The bicycle tube manufacturing method according to claim 7, wherein the bicycle tube is placed so as to face each other, and the end surfaces of the end portions are aligned and bonded by heating and pressing.