JP2003189439A - Device and method of assembling cold-shrink tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device of assembling a cold-shrink tube capable of completely fitting an elastic tube body onto a core member regardless of the diameter and the magnitude of elastic restoring force of the elastic tube body. <P>SOLUTION: This device of assembling the cold-shrink tube includes a diameter expanding means 22 for fitting the elastic tube body 1 onto the core member 2. The diameter expanding means 33 comprises a diameter expanding linear member bundle 35 for expanding the diameter of the elastic tube body 1, a pyramid member 8 which has a polygonal cross section corresponding to the number of diameter expanding linear members 34 and is formed with a recessed groove 7 at an angular cross-section part, and an advance/retreat driving means 6 for relatively advancing and retreating a pyramid member 8 and the diameter expanding linear member bundle 35 along a straight line L. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a room temperature shrinkable tube assembling apparatus and an assembling method for expanding the diameter of an elastic tube body and fitting it onto a core member.

[0002]

2. Description of the Related Art A cold-shrink type connecting material (cold-shrink tube) is used for connecting terminals such as cables for electric power or communication. The state before use of this room temperature shrinkable connection material consists of an elastic (rubber) tube body whose expanded state is held by the core member, and during connection work, insert the cable into the room temperature shrinkable connection material (core member), The core member is pulled out to reduce (restore) the diameter of the elastic tube body to cover the cable. In manufacturing (assembling) this cold-shrinkable connection material, the elastic tube body is elastically deformed to expand its diameter, and in that state, a core material is internally provided to obtain a product (a cold-shrinkable connection material).

As shown in FIG. 13, a conventional assembling apparatus has a diameter expanding rod bundle consisting of a plurality of metal diameter expanding rods 42 into which an elastic tube body 41 is inserted and which expands the diameter of the elastic tube body 41. The expansion rod opening / closing chuck 43 that holds the expansion rod 42 so that it can move (open / close) in the expansion direction of the elastic tube body 41, the opening / closing drive unit 44 that electrically opens and closes the chuck 43, and the expansion rod bundle. Chuck 43
A driving unit 45 for advancing and retreating together, a cylindrical expanded tube 47 having a tapered tube 46 at one end, a core member 48 installed at the other end of the expanded tube 47, and a expanded tube 47 are supported. And a holding portion 49 that holds the member 51 horizontally via the member 51.

A process of expanding the diameter of the elastic tube body 41 and mounting the elastic tube body 41 on the core member 48 using the conventional assembling apparatus having the above structure will be explained. Then, the elastic tube body 41 is fitted onto the bundle of the expanded rods 42, which is a bundle of four. Further, the core member 48 is internally provided on the base end side of the expanded diameter pipe 47, and the expanded diameter pipe 47 is attached to the holding portion 49 via the support member 51 (FIG. 13). Next, the tips of the taper pipes 46 of the diameter-expanding pipes 47 abut the diameter-expanding rods 42 so that the four diameter-expanding rods 42 can be inserted, and the chuck 43 is further advanced by the advancing / retreating drive unit 45. (Figure 14). Expanding rod 42
By advancing the tip of each of the expanding tubes 47 along the taper tube 46 of the expanding tube 47, each expanding rod 42 moves the tip of the expanding rod 42 outward (expands the expanding rod bundle), and in accordance with this, electric Each of the chucks 43 is moved outward by the opening / closing drive unit 44,
The base end portion of the expansion rod 42 is also expanded so as to be synchronized with the tip end portion. This causes the elastic tube body 41 to expand in diameter (FIG. 15). The bundle of the diameter-expanding rods 42 is further advanced to pass through the cylindrical portion 50 of the diameter-expanding pipe 47, and the diameter-expanding rods 42 ... Are bent and brought into contact with each other by the restoring force of the elastic tube body 41 (FIG. 16). Next, when the chuck 43 (diameter expanding rod 42 ...) Is retracted by the advancing / retreating drive unit 44, the diameter expanding rod is
42 ..... Withdrawing the diameter-expanding tube 47 together, the elastic tube bodies 41 are sequentially fitted onto the core member 48 at the same time, and assembly is completed (FIG. 17).

[0005]

In the conventional assembling apparatus, as shown in FIG. 18, when the diameter-expanding rods 42 ... Since the force) is strong, the expanding rod 42 is largely bent, and the elastic tube body 41 cannot be expanded effectively. Further, the expanding rod 42 advances while strongly rubbing the taper tube 46, so that metal powder is generated, and the metal powder may adhere to the product, resulting in a defective product. In addition, there is a problem in that the bending of the expanding rod 42 is plastically deformed beyond the elastic region, and the expanding rod 42 cannot be reused. Further, this phenomenon is remarkable in the elastic tube body 41 having a small diameter and the elastic tube body 41 having a strong elastic restoring force (contracting force). That is, when the elastic tube body 41 has a small diameter, a particularly thin and long expanding rod 42 is required, and the expanding rod 42 has low rigidity and is easily bent. Therefore, in the conventional assembly device, in the small diameter elastic tube body 41 and the elastic tube body 41 having a strong elastic restoring force,
It cannot be assembled. In addition, the elastic tube body of FIG. 15 and FIG.
The diameter expansion work of 41 proceeds while the inner surface of the rubber elastic tube body 41 slidably contacts the outer surface of the taper pipe 46 (diameter expansion pipe 47) as shown in the transverse sectional view of the diameter expansion pipe 47 of FIG. Therefore, the load due to friction is very large, and the driving force for the advancing / retreating drive unit 45 is required to be large, and the expanding rod 42 may buckle.

Therefore, the present invention provides a room temperature shrinkable tube assembling apparatus and an assembling method for securely fitting the elastic tube body onto the core member regardless of the diameter and elastic restoring force of the elastic tube body. To aim.

[0007]

In order to achieve the above object, a room temperature shrinkable tube assembling apparatus according to the present invention is a room temperature shrinkable tube having a diameter expanding means for externally fitting an elastic tube body to a core member. An assembling device, wherein the diameter expanding means includes a plurality of diameter expanding linear material bundles which are inserted into the elastic tube body to expand the elastic tube body, and the diameter expanding linear material bundle. A pyramidal member having a polygonal cross-section corresponding to the number of filaments and having a groove for sliding the enlarged filament at the corners of the cross section and having a tapered tip, and a center line of the bundle of enlarged filaments. Advancing and retracting drive means for relatively advancing and retracting the tip end portion of the pyramidal member and the expanded wire material bundle arranged on the same straight line along the straight line,
The tip end portion of the pyramidal member is inserted into the expanded diameter linear material bundle to which the elastic tube body is fitted by the forward movement of the advancing / retreating drive means, and each expanded diameter linear material bundle is expanded. The radial line members are slid along the concave grooves to expand the elastic tube body against the elastic restoring force.

[0008] A room-temperature shrinkable tube assembling device for externally fitting an elastic tube body on a core member, comprising a plurality of expanding rods inserted into the elastic tube body to expand the elastic tube body. A bundle of diameter rods, a polygonal cross section corresponding to the number of the diameter expansion rods, a pyramidal member having a tapered groove for sliding the diameter expansion rod at the corners of the cross section and a tapered tip, and the bundle of diameter expansion rods. A base end portion of the pyramidal member, comprising: a forward-backward drive means for relatively moving the tip end portion of the pyramidal member and the expanded rod bundle, which are arranged on the same straight line as the center line, along the straight line. Side, the core member is inserted so as to project into one end, and the distal end portion of the pyramidal member is inserted into the expanding rod bundle into which the elastic tube body is fitted by the forward movement of the advancing / retreating drive means, and the expanding portion is expanded. Slide the expanding rods of the bundle of diameter rods along the concave grooves to elastically restore the elastic tube body. The diameter is increased against the force, the distal end of the elastic tube body passes through the base end of the pyramidal member, the elastic tube body is reduced in diameter by elastic restoring force, and one end of the base end of the pyramid member projects. It is configured such that the expanded diameter rod is sandwiched between the core members and the expanded diameter rod is further advanced, and the expanded diameter rod bundle is further advanced so that the elastic tube body is externally fitted to advance the core member.

Further, the room temperature shrinkable tube assembling apparatus for externally fitting the elastic tube body to the core member, the string comprising a plurality of string-like members inserted into the elastic tube body to expand the diameter of the elastic tube body. -Shaped member bundle, a polygonal cross-section corresponding to the number of the string-shaped members, and a pyramidal member having a taper-shaped tip with taper-shaped member sliding grooves formed at the corners of the cross-section and inserted into the elastic tube body. An advancing / retreating drive means for relatively advancing / retreating the string-shaped member bundle and the tip end portion of the pyramid member arranged on the same line as the center line of the string-shaped member bundle along the straight line. The core member is inserted into the base end side of the pyramid member so as to project one end, and the elastic tube body is externally fitted by the advancing operation of the advancing / retreating drive means. Insert the tip end portion into each string-like member of the string-like member bundle. The elastic tube body is slid along the groove to expand the diameter of the elastic tube body against the elastic restoring force, and the distal end portion of the elastic tube body passes through the base end portion of the pyramidal member to form the elastic tube. The body is contracted by an elastic restoring force, and the base member of the pyramidal member is fitted onto the core member protruding at one end thereof with the cord-shaped member sandwiched therebetween, and the cord-shaped member bundle is further advanced to move the elastic tube body The core member is configured to be pulled and advanced by external fitting.

Further, the axial length of the pyramidal portion of the pyramidal member is longer than the axial length of the elastic tube body. In addition, extraction means for simultaneously withdrawing the expanding rods in a different direction by half each of the expanding rods of the expanding rod bundle from the elastic tube body sandwiching the expanding rod and the core member, respectively. Be prepared. In addition, with respect to the elastic tube body that sandwiches the string-like member and the core member, extraction means for simultaneously withdrawing each half of the string-like members of the string-like member bundle in different directions at the same time. Be prepared.

In order to achieve the above-mentioned object, the cold-shrink tube assembling method according to the present invention is a cold-shrink tube assembling method in which an elastic tube body is externally fitted to a core member. The elastic tube body is externally fitted to a diameter-expanding rod bundle composed of rods, and a pyramidal member having a tapered cross-section with a polygonal cross section corresponding to the center line of the diameter-expanding rod bundle and the number of the diameter-expanding rods. Are arranged on the same straight line, and the expanded rod bundle and the tip end portion of the pyramid member are relatively brought close to each other along the straight line so that the expanded rod bundle is inserted into the pyramid member. The diameter-expanding rods are slid toward the base end side of the pyramidal member along the grooves for sliding the diameter-expanding rod formed in the corners of the cross-section of the pyramidal member. The elastic tube in which the elastic tube body is elastically deformed to expand the diameter in the outer diameter direction, and the expanded rod bundle is further advanced to expand the diameter. When the distal end of the pyramidal member passes the proximal end of the pyramidal member, the distal end of the elastic tube body is reduced in diameter by a restoring force, and the core member is inserted into the proximal end of the pyramidal member in a projecting manner. The expanded tube is fitted with the expanded tube sandwiched, and the expanded tube bundle is further advanced to advance the elastic tube body to pull out the core member from the pyramidal member, and the elastic tube body is sequentially arranged in the longitudinal direction of the core member. Is to be fitted on the outside.

A method of assembling a room-temperature shrinkable tube in which an elastic tube body is externally fitted to a core member, wherein the elastic tube body is externally fitted to a string-like member bundle composed of a plurality of string-like members, The string in which the center line of the member bundle and the pyramidal member having a polygonal cross section corresponding to the number of the string-shaped members and having a tapered tip end are arranged on the same straight line, and the elastic tube body is fitted on the string. A bundle of strip-shaped members and the tip of the pyramidal member are brought into relative contact with each other along the straight line so that the bundle of strip-shaped members can be inserted into the pyramidal member, and abutted on each other to form a cross-sectional corner portion of the pyramidal member. The cord-shaped members slide along the groove for sliding the cord-shaped members toward the base end side of the pyramid member, and the cord-shaped members gradually elastically deform the elastic tube body to obtain the outer diameter. In the direction of the pyramid, the string-shaped member bundle is further advanced to expand the diameter, and the distal end portion of the elastic tube body is the pyramid. When passing through the base end portion of the material, the tip end portion of the elastic tube body is reduced in diameter by a restoring force, and the cord-like member is sandwiched by the core member which is inserted into the base end portion of the pyramid member so as to project once. External fitting, the string-shaped member bundle further advances to advance the elastic tube body, draws out the core member from the pyramidal member, and sequentially fits the elastic tube body in the longitudinal direction of the core member. It is a thing.

Further, from the cold-shrinkable tube sandwiching the expanding rod, half of the expanding rods in the expanding rod bundle are simultaneously pulled out in different directions and pulled out. Further, the cord-shaped members, which are half the number of the cord-shaped members of the cord-shaped member bundle, are simultaneously pulled out in different directions from the cold-shrinkable tube sandwiching the cord-shaped members.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the illustrated embodiments.

A cold-shrink type connection material (cold-shrink tube) is used for connecting terminals such as cables for electric power or communication. Specifically, this material is, for example, 6.
Terminal connection member such as 6kVCV cable (at room temperature)
The cable is externally fitted and covered by a contracting rubber tube to connect the cable. The state before use (connection) of this connecting member is a unit having a silicon rubber rubber tube in which the expanded diameter state is held, and in order to maintain the expanded diameter state, the polypropylene tube is made inside the expanded rubber tube. A cylindrical spiral core made of a string-shaped material is inserted. Then, at the time of connection work, the tubular spiral core (hereinafter referred to as a core member) is unwound, the rubber tube (hereinafter referred to as an elastic tube body) is reduced in diameter (restored), and the cable is externally fitted and covered. belongs to.

In the factory production (assembly) of this cold-shrinkable connection material, the elastic tube body is elastically deformed to expand its diameter,
In that state, the core member is internally provided as a product (a cold shrinkable connection material). Then, FIG. 1 shows a room temperature shrinkable tube assembling apparatus for externally fitting the elastic tube body 1 to the core member 2. 2 to 5 show the work steps by this assembling apparatus in order.

As shown in FIG. 1, the room temperature shrinkable tube assembling apparatus is provided with a diameter expanding means 33 for expanding the diameter of the elastic tube body 1 on the apparatus frame 17. The diameter expansion means 33 is a bundle of diameter expansion filaments 35 that is inserted into the elastic tube body 1 and expands the diameter of the elastic tube body 1.
a includes a pyramidal member 8 having a tapered shape, and an advancing / retreating drive means 6 for relatively advancing and retracting the expanded wire material bundle 35 and the pyramidal member 8 along a straight line L.

The expanded diameter linear member 34 is the expanded diameter rod 4 made of steel or resin (for example, polyethylene) or the cord-like member 14 shown in FIG. 11, and these are expanded into a plurality of bundles. Diameter wire bundle
35, that is, the expanded rod bundle 5 and the string-like member bundle 15. The string-shaped member 14 may be a metal wire, Kevlar, or the like. Explaining the expanded wire material 34 as the expanded wire 4 and the expanded wire material bundle 35 as the expanded wire bundle 5, as shown in the front view of the expanded wire holding portion 13 of FIG. 6 and the side view of FIG. Further, in the present invention, the number of the expanding rods 4 is four, and the base end portion of each expanding rod 4 is cantilevered to each chuck 13a of the expanding rod holding portion 13. Although the four chucks 13a are always elastically urged by the elastic body 16 toward the center of the expanded rod holding portion 13, each chuck 13a holds the expanded rod 4 while holding the elastic body. Against 16,
It is slidable in the direction of arrow a.

The expansion rod 4 is longer than the longitudinal dimension of the elastic tube body 1, and when the elastic tube body 1 is fitted on the outside, the expansion rod 4 is projected from the tip portion 1a of the elastic tube body 1. Become. Further, as shown in FIG. 6, when the expanding rods 4 constituting the expanding rod bundle 5 are viewed from the cross section, the centers of the expanding rods 4 are arranged on the same circle. The elastic tube body 1 is externally fitted to the expanded rod bundle 5.

As shown in the side view of FIG. 8 and the sectional view of FIG. 9, the pyramidal member 8 has a diameter-expanding linear member 34 (diameter-increasing rod 4, cord-shaped member 1).
4) having a polygonal cross section corresponding to the number of 4), comprising a pyramid portion 9 and a prism portion 11 continuous with the pyramid portion 9, and a groove for sliding the expanded linear material at the corner portion of the cross section. 7 are formed. In the present invention, since there are four expanding rods 4,
The pyramidal member 8 has a pyramidal portion 9 of a quadrangular pyramid and a prismatic portion 11 of a quadrangular prism. Therefore, the concave groove 7 is formed in a square having a square cross section.
The groove 7 has a rounded shape corresponding to the cross-sectional shape of the expanded rod 4 (or the string-shaped member 14). As shown in FIG. 9, the shape of the groove 7 is the entire length of the pyramid member 8. Is the same across. The pyramidal member 8 is a substantially quadrangular pyramid-shaped jig having a square cross section having a gentle grooved gradient portion.

The concave groove 7 is provided at the full-angle portion of the cross section of the pyramidal member 8,
The diameter-expanding rods 4 are slid on the concave grooves 7.
Further, the sectional shape of the pyramidal member 8 is not limited to a quadrangle, but may be a triangle or a polygon such as a hexagon shown in FIG. 10.
In the case of FIG. 10, the expanding rods 4 are six and the expanding rod bundle 5 is a bundle.
The number of chucks 13a of the expanded rod holding portion 13 is six. The pyramidal member 8 is preferably made of metal or resin, and when it is made of resin, it is not shown in the drawings, but in the prismatic portion 11 provided with an insertion hole 12 described later, it is made of a composite material having a metal rigid core member. Good. As a result, even if the elastic tube body 1 has a strong elastic restoring force, the pyramidal member 8 does not collapse.

Further, an insertion hole 12 into which the core member 2 is inserted is formed in the base end portion 8b of the pyramidal member 8 (square prism portion 11). Further, returning to FIG. 1, in order to maintain the posture of the pyramid member 8 in the horizontal direction on the device mount 17, the support rod 19 is inserted and fixed in the insertion hole 12 (so as to be inserted into the core member 2).
The other end of the support rod 19 is attached to a holding portion 18 arranged on one end side of a device stand 17 of the diameter expanding device. The pyramid member 8 is arranged on the same straight line L as the center line of the expanded rod bundle 5. Further, the axial length of the pyramidal portion 9 of the pyramidal member 8 is set to be longer than the axial length of the elastic tube body 1 to be expanded in diameter, and it is particularly preferably set to 2 to 3 times. If it is shorter than 2 times, the diameter expansion operation of the elastic tube body 1 described later may not be smooth, and if it is longer than 3 times, the entire apparatus becomes too long.

In the present invention, the advancing / retreating drive means 6 is a device for advancing / retreating the expanding rod holding portion 13, and travels on the traveling table 20 on which the expanding rod holding portion 13 is mounted and the device stand 17. Stand 20
A drive unit (21) for linearly advancing and retreating, and a guide unit (22) for guiding the advancing and retreating of the traveling platform (20). More specifically, the traveling table 20 may be provided with a nut member, and the drive section 21 may be a ball screw type drive means 21 'which is rotationally driven by a motor and a speed reducer. The progress of can be smoothed. And the pyramid member 8
The tip end portion 8a of () and the expanded rod bundle 5 can be relatively advanced and retracted along the straight line L. Alternatively, the advance / retreat driving means 6 may be configured to advance / retreat the holding portion 18 and advance / retreat the pyramidal member 8. In this forward / backward movement, the direction in which the expansion rod holding portion 13 and the holding portion 18 approach each other is defined as the forward movement (the direction in which the expansion rod holding portion 13 moves to the holding portion 18 side is defined as the forward movement),
The opposite is set back.

Next, the operation of expanding the elastic tube body 1 by the expanding means 33 will be described. As shown in FIG. 2, a plurality of expanded rods 4 on which the elastic tube body 1 is fitted.
Of the expanded rod bundle 5 and the tip 8 of the pyramid member 8
and a are brought relatively close to each other along the straight line L and brought into contact (butting). That is, as shown in the side view of the main part of FIG. 7, the advancing / retreating drive means 6 advances the expanding rod holding portion 13 (expanding rod bundle 5) along the straight line L, and the tip end portion of the expanding rod bundle 5 is moved. Are inserted into the tip portion 8a of the pyramidal member 8.
When the expanding rod holding portion 13 further advances, the tip end of each expanding rod 4 moves toward the base end portion 8b side of the pyramid member 8 along the expanding rod sliding concave groove 7 at the corner portion of the pyramid member 8. By sliding, the expanded rod 4 moves in the direction of arrow a. In other words, the expanded rod bundle 5 spreads outward (radially). At the same time, the chuck 13a holding the base end portion of the expanding rod 4 also gradually expands outward.

Then, the expanded rod holding portion 13 is further advanced,
As shown in FIG. 3, as the expanding rod bundle 5 expands outward, each expanding rod 4 gradually elastically deforms the elastic tube body 1 to expand it in the outer diameter direction. Next, FIG. 9 shows a cross-sectional view of the pyramidal member 8. The expanding rod 4 and the elastic tube body 1
Is indicated by a chain double-dashed line. In the step of expanding the diameter of the elastic tube body 1, as shown in FIG. 9, the inner surface of the elastic tube body 1 and the outer surface of the pyramidal member 8 do not come into contact with each other and the elastic tube body 1 has the gap D and has a pyramidal member. Expand the diameter while advancing 8 This is due to the action of the arrangement of the cross-sectional shape of the pyramidal member 8 and the expanded rod 4 that slides (slides) in the concave groove 7 of the pyramid member 8. That is, the pyramidal member 8 has a polygonal cross section, and the expansion rods 4 are arranged in the concave grooves 7 at the corners thereof, so that the common tangent line (on the outer side) of the adjacent expansion rods 4 and 4 is This is because they do not contact (do not intersect) the outer circumference of the pyramidal member 8, and the common tangent line of the adjacent expanding rods 4 and 4 is the inner surface of the expanded elastic tube body 1.
That is, the expanding rod 4 is used as an intervening slide member, the concave groove 7 of the pyramidal member 8 is used as a guide rail, and the expanding rod 4 receives the tightening force of the elastic tube body 1 along the concave groove 7, The rod 4 is not excessively bent due to the contracting force of the elastic tube body 1. Then, the elastic tube body 1 is expanded in diameter. Therefore, the coefficient of friction between the diameter-expanding rod 4 and the pyramidal member 8 (concave groove 7) is small, and the pyramidal portion 9 of the pyramidal member 8 is a gently inclined surface, so that the elastic tube body 1 is smoothly expanded in diameter. To go.

Further, as shown in FIG. 10, even if the pyramidal member 8 has a hexagonal cross-sectional shape, for example, the elastic tube body 1 and the pyramidal member 8 have a gap D and do not come into sliding contact with each other. . The polygonal cross section referred to in the present invention also includes a polygonal cross section partially having a hole or a notch as shown in FIG. Further, when the elastic tube body 1 climbs the inclined surface of the pyramid member 8 and expands in diameter, if the elastic tube body 1 may slip off, the base end portion 1b of the elastic tube body 1 expands in diameter. Since the base end portion of the elastic tube body 1 is pushed by contacting the vertical portion of the rod holding portion 13, the elastic tube body 1 does not escape in the longitudinal direction,
Can hold position.

Next, a means for subsequently fitting the elastic tube body 1 whose diameter has been expanded by the diameter expansion means 33 to the required predetermined shape onto the core member 2 will be described. First, the core member 2 has an insertion hole provided on the base end portion 8b side of the pyramid member 8 in advance.
It is inserted in 12 so as to project. Then, as shown in FIG. 4, the expanded diameter rod bundle 5 fitted with the expanded elastic tube body 1 is advanced to move the distal end portion 1 of the elastic tube body 1.
When a passes through the base end portion 8b of the pyramid member 8, the tip end portion 1a of the elastic tube body 1 is reduced in diameter by the restoring force (contracting force) and inserted into the base end portion 8b of the pyramid member 8 in a protruding manner. The expanded bar 4 is sandwiched and fitted onto the core member 2. In this state, due to the elastic restoring force of the elastic tube body 1, the elastic tube body 1
The inner surface of (1) presses the outer surface of the core member 2 (partly via the diameter-expanding rod 4).

Further, by moving the expanding rod bundle 5 forward, the base end portion 8 of the pyramidal member 8 also in the middle portion of the elastic tube body 1.
As it passes through b, the core member 2 is gripped (by frictional force) by the above-mentioned external fitting pressing force of the elastic tube body 1 tip portion 1a, and the core member 2 is pulled out from the base end portion 8b of the pyramidal member 8 and sequentially. The elastic tube body 1 that has passed through the base end portion 8b of the pyramidal member 8 can be externally fitted in the longitudinal direction of the core member 2. Therefore, as shown in FIG. 5, when the entire elastic tube body 1 completely passes through the base end portion 8b of the pyramidal member 8, the elastic tube body 1 whose diameter has been expanded from the natural state is fitted onto the core member 2. It will be in a state of being

However, in the state shown in FIG. 5, the expanding rod 4 is still interposed between the core member 2 and the elastic tube body 1. Therefore, as shown in FIG. 12, the assembling device of the present invention includes half the number of the expanding rods 4 of the expanding rod bundle 5 from the elastic tube body 1 sandwiching the expanding rod 4 and the core member 2. Each of the expanding rods 4 is provided with a extracting means 10 for simultaneously extracting the expanding rod 4 in different directions (arrow b and arrow c). More specifically, as shown in FIG. 12 (a), four expanding rods 4 ... Are sandwiched between the core member 2 and the elastic rubber member 1, and two expanding rods 4 are formed. By holding with the holding claws 23, 23 of the extracting means 10 provided on the expansion rod holding portion 13 side and the holding portion 18 side, and simultaneously pulling out to the expansion rod holding portion 13 side and the holding portion 18 side, respectively. As shown in FIG. 12 (b), the core member 2 and the elastic tube body 1 do not shift in the longitudinal direction (the elastic tube body 1 does not remain on the core member 2 and slips off together with the expanding rod 4) at room temperature. The unit of the shrink tube 3 is assembled. Further, a plurality of sets of the holding claws 23 may be arranged on one side, and further,
It is preferable that the expanding rods 4 that are not adjacent to each other be pulled out in the same direction. When the number of the diameter expansion rods 4 is an odd number, one side may be increased in number, and there is no influence in this device. The expanded diameter linear member 34 to be pulled out by the extracting means 10 has the same configuration and the same method in the case of the string-shaped member 14.

Next, as shown in FIG. 11, the case where the cord-shaped member 14 is used as the expanded diameter linear member 34 will be explained. The elastic tube body 1 is attached to the cord-shaped member bundle 15 composed of a plurality of cord-shaped members 14. And the string-like member 14 is advanced along the string-like member sliding groove 7 formed at the eight corners of the pyramidal member 8 having the same predetermined cross-sectional shape as described above, and the elastic tube body 1 is expanded in diameter to form a core member. Two
To fit on. This is the same method as the case of using the diameter-expanding rod 4, but when using the string-shaped member 14, as shown in FIG. The cord 13 is held by a chuck 13a of 13 and the other end of the cord 13 can be wound while being pulled by a winding means 24 provided in a holding portion 18. This is because the external fitting portion of the string-shaped member 14 to which the elastic tube body 1 is externally fitted gives tension to the string-shaped member 14 when approaching the pyramidal member 8 and sliding in the groove 7. Synchronizing with the forward movement of the expanding rod holding portion 13 by the driving means 6,
The string-shaped member 14 is wound by the drum-shaped winding means 24 corresponding to the number of the string-shaped members 14. Further, before the diameter expansion work of FIG. 11 is started, the cord-shaped member 14 is arranged along the concave groove 7 of the pyramidal member 8 and along the concave groove 7, and even after the elastic tube body 1 is advanced. The string-shaped member 14 slides along the groove as it is. Further, the string-like member 14 may be a covered string-like member covered with a resin. As a result, the elastic tube body 1 is not scratched, and the extraction process of the string-shaped member 14 by the extraction means 10 reduces friction and can be performed smoothly. Note that common reference numerals between FIG. 11 and FIG. 1 indicate the same components.

The assembling apparatus of the present invention is not limited to the above-mentioned embodiment, and for example, the expanding rod 4 is not provided on the expanding rod holding portion 13 in the front side protruding shape (FIG. 1), but is shown in FIG. As described above, the expanded rod holding portion 13 may be arranged so as to project rearward. That is, it is sufficient to move the expanding rod holding portion 13 in the pulling direction of the expanding rod 4 without moving the expanding rod 4 forward by the expanding rod holding portion 13. This prevents the expanded rod 4 from buckling. Note that other configurations and operations are similar to those in FIGS. This configuration is of course applicable even when the string-like member 14 is used (not shown), and the string-like member 14 is not provided with the winding means 24 (or the driving means is only the winding means 24).
The elastic tube body 1 can be advanced so as to be pulled without slackening.

[0032]

The present invention has the following effects due to the above configuration.

(According to claim 1) The expanded diameter linear members 34 slide on the concave grooves 7 provided at the corners of the cross section of the pyramidal member 8 and on the outer peripheral side of the expanded diameter linear member bundle 35. The elastic tube body 1 is the pyramid member 8
Since a gap D is formed and the diameter of the elastic tube body 1 is expanded, the elastic tube body 1 is smoothly and stably expanded in diameter without frictional resistance due to contact between the elastic tube body 1 and the pyramidal member 8.
Further, even if the diameter-expanded linear members 34 ... Have a small diameter (even if the rigidity is small), the diameter of the elastic tube body 1 can be reasonably expanded. That is, it is also applicable to the elastic tube body 1 having a small diameter.

(According to Claims 2 and 7) The expanding rods 4 slide on the concave grooves 7 provided at the corners of the pyramidal member 8 in cross section, and the elastic tube is formed on the outer peripheral side of the expanding rod bundle 5. Since the body 1 forms the gap D with the pyramidal member 8 and advances in diameter expansion, there is no frictional resistance due to contact between the elastic tube body 1 and the pyramidal member 8, and a smooth and stable diameter expansion of the elastic tube body 1 is achieved. You can do it. Then, the elastic tube body 1 can be sequentially fitted onto the core member 2,
You can get the product easily. Groove 7 of pyramid member 8 ...
Since the diameter-expanding rods 4 slide to expand the diameter of the elastic tube body 1, the diameter of the diameter-expanding rod 4 can be reduced regardless of the rigidity of the diameter-expanding rod 4. That is, it is also applicable to the elastic tube body 1 having a small diameter.

(According to Claims 3 and 8) The string-like members 14 slide on the concave grooves 7 provided at the corners of the pyramidal member 8 in cross section, and the elastic tube is provided on the outer peripheral side of the string-like member bundle 15. Body 1 is a pyramid member 8
Since the gap D is formed and the diameter of the elastic tube body 1 is expanded and advanced, there is no frictional resistance between the elastic tube body 1 and the pyramidal member 8, and the elastic tube body 1 can be expanded in diameter smoothly and stably. Then, the elastic tube body 1 can be sequentially fitted onto the core member 2 to easily obtain a product. Since the diameter of the cord-shaped member 14 is expanded, the cord-shaped member 14 can be used any number of times without exchanging the members, the workability is good, and the manufacturing cost can be reduced. Since the string-shaped members 14 slide in the concave grooves 7 of the pyramid member 8 to expand the diameter of the elastic tube body 1, the string-shaped members 14 can have a small diameter regardless of the rigidity of the string-shaped members 14. it can. That is, it is also applicable to the elastic tube body 1 having a small diameter.

(According to the fourth aspect) Since the elastic tube body 1 is guided and advanced on the gently inclined surface, the diameter expansion rod 4
Even if the diameter of ... Is small (even if the rigidity is small), the elastic tube body 1 can be expanded in diameter without fail and without applying a load to the member. That is, it is also applicable to the elastic tube body 1 having a small diameter. Further, a drive means for expanding the diameter of the elastic tube body 1 (opening / closing drive section shown in FIG.
44) is unnecessary.

When the expanding rod 4 is pulled out (according to claims 5 and 9), due to the imbalance of the friction between the expanding rod 4 and the elastic tube body 1 and between the expanding rod 4 and the core member 2, the elastic tube is The body 1 and the core member 2 do not shift (the relative position does not change), the respective frictions are balanced, and the diameter expansion rod 4
Can be pulled out.

When the cord-shaped member 14 is pulled out (according to claims 6 and 10), the elastic tube is caused by the imbalance of the friction between the cord-shaped member 14 and the elastic tube body 1 and between the cord-shaped member 14 and the core member 2. The body 1 and the core member 2 are not displaced (the relative position is not changed), the respective frictions are balanced, and the string-shaped member 14 can be pulled out at a time.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an assembling apparatus of the present invention.

FIG. 2 is a side view showing an assembling work by the assembling apparatus of the present invention.

FIG. 3 is a side view showing an assembling work by the assembling apparatus of the present invention.

FIG. 4 is a side view showing an assembling work by the assembling apparatus of the present invention.

FIG. 5 is a side view showing an assembling work by the assembling apparatus of the present invention.

FIG. 6 is a front view of a diameter expansion rod holding portion.

FIG. 7 is a side view showing a main part of an assembling work by the assembling apparatus of the present invention.

FIG. 8 is a partial cross-sectional side view of a pyramidal member.

FIG. 9 is a cross-sectional view of a pyramid member.

FIG. 10 is a transverse sectional view showing another embodiment of the pyramid member.

FIG. 11 is a side view showing another embodiment of the assembling apparatus of the present invention.

FIG. 12 is a perspective view showing a drawing operation.

FIG. 13 is a side view showing another embodiment of the assembling apparatus of the present invention.

FIG. 14 is a side view showing a conventional assembly device.

FIG. 15 is a side view showing an assembling work by a conventional assembling apparatus.

FIG. 16 is a side view showing an assembling work by a conventional assembling apparatus.

FIG. 17 is a side view showing an assembling work by a conventional assembling apparatus.

FIG. 18 is a side view showing an assembling work by a conventional assembling apparatus.

FIG. 19 is a side view showing an assembling work by a conventional assembling apparatus.

FIG. 20 is a cross-sectional view showing an assembling work by a conventional assembling apparatus.

[Explanation of symbols]

1 Elastic tube body 2 core members 4 Expanding rod 5 Expanding rod bundle 6 Forward / backward drive means 7 groove 8 pyramid members 8a tip 8b base end 9 pyramid 10 Removal means 14 String member 15 String-like member bundle 33 Expansion means 34 Expanded wire rod 35 Expanded wire bundle L straight line

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3C030 BB11 BC04 BC21                 4F211 AD05 AE01 SA11 SC01 SD04                       SJ01 SJ21 SP20                 5G355 AA03 BA02 BA14 CA06 CA09                 5G375 AA02 BA26 BB43 CA02 CA13                       CB07 DB32 EA17

Claims (10)

[Claims] 1. A room temperature shrinkable tube assembling apparatus having a diameter expanding means for externally fitting an elastic tube body on a core member, wherein the diameter expanding means is inserted into the elastic tube body. For expanding the diameter of the expanded wire material, which has a polygonal cross section corresponding to the number of the expanded wire material, and for expanding the expanded wire material at the corners of the cross section. A pyramidal member having a groove formed and a tapered tip, a tip portion of the pyramidal member arranged on the same straight line as the center line of the expanded wire material bundle, and the expanded wire material bundle. An advancing / retreating drive means for relatively advancing / retreating along the straight line, and the distal end portion of the pyramidal member is attached to the expanded diameter linear material bundle to which the elastic tube body is fitted by the advancing operation of the advancing / retreating drive means. The elastic tube by sliding each expanded wire material of the expanded wire material bundle along the concave groove. An apparatus for assembling a cold-shrink tube, wherein the body is configured to expand its diameter against an elastic restoring force. 2. A room temperature shrinkable tube assembling apparatus for externally fitting an elastic tube body to a core member, comprising a plurality of expanding rods inserted into the elastic tube body to expand the elastic tube body. A bundle of diameter rods, a polygonal cross section corresponding to the number of the diameter expansion rods, a pyramidal member having a tapered groove for sliding the diameter expansion rod at the corners of the cross section and a tapered tip, and the bundle of diameter expansion rods. A base end portion of the pyramidal member, comprising: a forward-backward drive means for relatively moving the tip end portion of the pyramidal member and the expanded rod bundle, which are arranged on the same straight line as the center line, along the straight line. Side, the core member is inserted so as to project into one end, and the distal end portion of the pyramidal member is inserted into the expanding rod bundle into which the elastic tube body is fitted by the forward movement of the advancing / retreating drive means, and the expanding portion is expanded. Sliding each expanding rod of the bundle of large diameter rods along the above-mentioned groove to make the elastic tube body elastically recover. The end portion of the elastic tube body is passed through the base end portion of the pyramidal member, the elastic tube body is reduced in diameter by an elastic restoring force, and the base end portion of the pyramid member is projected at one end. Externally fitted to the core member by sandwiching the expanded rod,
A room-temperature shrinkable tube assembling apparatus, characterized in that the expanded diameter rod bundle is further advanced and the core member is pulled forward by external fitting of the elastic tube body. 3. A room-temperature shrinkable tube assembling apparatus for externally fitting an elastic tube body to a core member, the string comprising a plurality of string-like members inserted into the elastic tube body to expand the elastic tube body. -Shaped member bundle, a polygonal cross-section corresponding to the number of the string-shaped members, and a pyramidal member having a taper-shaped tip with taper-shaped member sliding grooves formed at the corners of the cross-section and inserted into the elastic tube body. Advancing / retreating drive means for relatively advancing / retreating the above-mentioned string-like member bundle and the tip end portion of the pyramid member arranged on the same straight line as the center line of the string-like member bundle along the straight line.
The core member is inserted into the base end side of the pyramid member so as to project one end, and the elastic tube body is externally fitted by the advancing operation of the advancing / retreating drive means. The distal end of the elastic tube body is slid, and each string-shaped member of the string-shaped member bundle is slid along the recessed groove to expand the elastic tube body against the elastic restoring force. The tip portion of the body passes through the base end portion of the pyramid member, the elastic tube body is reduced in diameter by an elastic restoring force, and the base end portion of the pyramid member is sandwiched between the core members protruding from one end. The cold-shrinkable tube assembling apparatus, wherein the cord-like member bundle is further advanced and the elastic tube body is externally fitted so that the core member is pulled and advanced. 4. The axial length of the pyramidal portion of the pyramidal member is
The room temperature shrinkable tube assembling apparatus according to claim 2 or 3, which is longer than the axial length of the elastic tube body. 5. From the elastic tube body and the core member sandwiching the expanding rod, half of the expanding rods of the expanding rod bundle are simultaneously pulled out in different directions. The cold-shrinkable tube assembling apparatus according to claim 2 or 4, further comprising an extracting means. 6. The elastic tube body sandwiching the string-like member and the core member are simultaneously pulled out in different directions by half each of the string-like members of the string-like member bundle. The cold-shrinkable tube assembling apparatus according to claim 3 or 4, further comprising an extracting means. 7. A method for assembling a room-temperature shrinkable tube, wherein an elastic tube body is externally fitted to a core member, wherein the elastic tube body is externally fitted to a diameter-expanding rod bundle composed of a plurality of diameter-expanding rods. A center line of the rod bundle and a pyramidal member having a polygonal cross section corresponding to the number of the diameter-expanding rods and having a tapered tip portion are arranged on the same straight line, and the diameter-increasing rod bundle and the pyramidal members are The tip end portion is brought into relatively close contact with the expanded diameter rod bundle along the straight line so that the expanded diameter rod bundle can be inserted into the pyramidal member, and is brought into contact with the distal end portion to form the expanded diameter rod sliding groove formed in the corner portion of the cross section of the pyramidal member. Along with each of the expanding rods sliding toward the base end side of the pyramidal member, the expanding rods gradually elastically deform the elastic tube body to expand the diameter in the outer diameter direction. When the distal end portion of the elastic tube body whose diameter-expanding rod bundle is advanced and expanded and passes through the base end portion of the pyramidal member, the distal end portion of the elastic tube body is restored. The expanded tube is inserted into the core member, which is reduced in diameter by the original force and inserted into the base end portion of the pyramid member so as to project at one end, and the expanded bar is further advanced to advance the elastic tube. A method for assembling a cold-shrinkable tube, characterized in that the core member is advanced from the pyramidal member by advancing a body, and the elastic tube body is externally fitted in the longitudinal direction of the core member successively. 8. A method of assembling a cold-shrinkable tube, wherein an elastic tube body is externally fitted to a core member, wherein the elastic tube body is externally fitted to a string-like member bundle composed of a plurality of string-like members. The string in which the center line of the member bundle and the pyramidal member having a polygonal cross section corresponding to the number of the string-shaped members and having a tapered tip end are arranged on the same straight line, and the elastic tube body is fitted on the string. A bundle of strip-shaped members and the tip of the pyramidal member are brought into relative contact with each other along the straight line so that the bundle of strip-shaped members can be inserted into the pyramidal member, and abutted on each other to form a cross-sectional corner portion of the pyramidal member. The cord-shaped members slide along the groove for sliding the cord-shaped members toward the base end side of the pyramid member, and the cord-shaped members gradually elastically deform the elastic tube body to obtain the outer diameter. In the direction of the pyramidal member. When passing through the base end portion, the tip end portion of the elastic tube body is reduced in diameter by a restoring force and is inserted into the base end portion of the pyramid member so as to project from the base end portion. Then, the string-shaped member bundle is further advanced to advance the elastic tube body to draw out the core member from the pyramidal member, and the elastic tube body is sequentially fitted on the core member in the longitudinal direction. Characteristic cold shrink tube assembly method. 9. The expansion rods of half the number of the expansion rods in the bundle of expansion rods are simultaneously pulled out in different directions from the cold-shrinkable tube sandwiching the expansion rods, and pulled out in different directions at the same time. Assembling the cold shrink tube. 10. The cord-shaped members, which are half the number of the cord-shaped members of the cord-shaped member bundle, are simultaneously pulled out in different directions from the cold-shrinkable tube sandwiching the cord-shaped members, and pulled out at the same time. Assembling the cold shrink tube.