JP3174734B2 - Grip with built-in heater for vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grip with a built-in heater for a vehicle used by being attached to a handle pipe of a vehicle such as a motorcycle, a snowmobile and a three-wheel buggy.

[0002]

2. Description of the Related Art FIGS.
As shown in FIG. 5, an FPC heater 4 is embedded and integrated in a semi-cylindrical synthetic resin inner piece 3 in a cylindrical rubber grip main body 2 that can be fitted to a handle pipe 1 of a vehicle. It has a structured structure. Reference numeral 5 denotes a lead-out portion of the FPC heater 4 led out from the grip body 2.
A power supply cord (not shown) is solder-welded to the lead-out portion 5.

In order to manufacture the grip body 2, FIG.
As shown in FIG. 6, the inner piece 3 on which the FPC heater 4 is wound is assembled to the core mold 6, and a raw rubber sheet 7 is wound thereon and accommodated in the molds 8a and 8b.
a, 8b are brought into close contact (clamping). And mold 8
When the temperature reaches a predetermined temperature at which the raw rubber sheet 7 in the a and 8b is melted, the molten rubber is caused to flow into the molds 8a and 8b to form the grip body 2. When the rubber in the mold has been vulcanized, the formed grip body 2 is moved to the mold 8a,
Remove from 8b and let cool for a predetermined time.

[0004]

However, since the conventional inner piece 3 is a semi-cylindrical type, the rubber layer cools and shrinks in the process of taking out the molded grip body 10 from the mold and keeping it cool. In particular, the rubber layer region 2a facing the inner piece 3 shrinks, and furthermore, the circumferential ends 3a, 3a of the inner piece deform due to the shrinking force of the rubber layer in a direction approaching each other, and the grip main body 2 becomes distorted. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to increase the rigidity of the inner piece by providing an annular portion on an inner piece which is a planar heater reinforcing plate. The object of the present invention is to provide a grip with a built-in heater for a vehicle, which is not deformed after molding.

[0006]

According to a first aspect of the present invention, there is provided a grip with a built-in heater for a vehicle according to the first aspect of the present invention. In a vehicle heater built-in grip in which a substantially semi-cylindrical synthetic resin inner piece having a heater wound therein is embedded and integrated, at a predetermined position in the axial direction of the inner piece, an inner member is formed due to shrinkage of a rubber layer after forming the grip body. In addition to preventing deformation of the piece, an annular portion functioning as a guide for inserting a handle pipe or a throttle pipe is integrally provided. After the molding is completed, a contraction force when the rubber layer cools and solidifies acts on the grip body taken out of the mold, and particularly in the rubber layer region facing the inner piece, the rubber layer is circumferentially and axially moved. While trying to shrink and deform, and to deform the circumferential ends of the inner piece in a direction approaching each other, the annular portion integrally provided on the inner piece receives the compressive force acting on this rubber layer, Prevent these deformations. Further, since the annular portion is provided at a predetermined position in the axial direction of the inner piece, the flexibility of the grip body when the handle pipe (or the throttle pipe) is pressed into the grip body is not significantly impaired. The annular portion acts as a guide for inserting the handle pipe (or throttle pipe). According to a second aspect of the present invention, in the grip for a vehicle heater according to the first aspect, the annular portion is provided so as to face front and rear ends of the inner piece, and is provided at both front and rear ends of the inner piece. Since the formed annular portion opposes the contraction force of the rubber layer, the contraction deformation of the rubber layer region facing the inner piece and the deformation of the inner piece are further prevented. Further, at the front and rear ends of the grip body, the annular portion guides the insertion of the handle pipe (or the throttle pipe). According to a third aspect of the present invention, in the grip with a built-in heater for a vehicle according to the second aspect, a second inner piece made of a synthetic resin having a substantially semi-cylindrical shape is disposed between the front and rear annular portions, and both inner pieces are formed of one cylinder. Since the second inner piece disposed between the front and rear annular portions opposes the circumferential and axial contraction forces generated in the rubber layer between the front and rear annular portions, the grip is provided. Deformation of the entire body is prevented. Further, since the second inner piece is not fixed in a direction away from the inner piece, the flexibility of the grip body is not significantly impaired, and the handle pipe is easily press-fitted. According to a fourth aspect of the present invention, in the grip with a built-in heater for the vehicle according to the third aspect, a circumferential central portion of the front and rear ends of the second inner piece is engaged with the front and rear annular portions. The second inner piece axially supports the circumferentially bisecting position of the annular portion, which can most effectively resist the axial contraction force generated in the rubber layer between the front and rear annular portions, so that deformation of the entire grip body is effective. Is blocked. According to a fifth aspect of the present invention, in the grip with a built-in heater for a vehicle according to the third or fourth aspect, the grip is formed in the grip body forming step between the second inner piece and the inner piece and / or between the second inner piece and the front and rear annular portions. A slit for allowing rubber to flow into the inner piece is provided. In the grip body forming step, a first slit between the inner piece and the second inner piece is provided.
Since the molten rubber flows into the inner piece from both the slit and the second slit between the second inner piece and the annular portion, the filling time of the rubber into the inner piece is short.
Further, since the second slit is located at a position different from the first slit in the circumferential direction, the rubber can quickly flow into every corner in the inner piece. According to a sixth aspect of the present invention, in the grip with a built-in heater according to the second aspect, an inner peripheral surface of the front end side annular portion is provided with an abutting portion for positioning an inner piece that abuts on a core metal mold when the grip body is formed. The contact portion for positioning the inner piece comes into contact with the core mold, and the inner piece is accurately arranged at a predetermined position in the mold for forming the grip body. According to a seventh aspect of the present invention, in the grip with a built-in heater for a vehicle according to the second aspect, the inner peripheral edge of the front end side annular portion is engaged with a core mold, and the inner piece is circumferentially moved relative to the grip body forming mold. A notch for positioning is provided, and a notch provided on the inner peripheral edge of the front end side annular portion is engaged with the core mold, and the inner piece is accurately positioned in the circumferential direction in the grip forming mold. You. According to a eighth aspect of the present invention, in the grip with a built-in heater for a vehicle according to the second aspect, the inner piece is axially positioned on the rear end side annular portion by abutting a grip body forming die, and a grip body forming step is performed. In this case, the convex and concave portions provided on the rear end side annular portion come into contact with the grip molding die, and the inner piece is axially moved in the die in the mold. Is accurately positioned. Further, in the grip body forming step, the molten rubber flows into the inner part of the inner piece from the concave portion of the concave and convex portion.

[0007]

Next, embodiments of the present invention will be described based on examples. 1 to 10 show an embodiment of the present invention. FIG. 1 is a perspective view of a left grip with a built-in heater according to a first embodiment of the present invention, and FIG. 2 is a perspective view of the grip with a part omitted. Fig. 3 is a longitudinal sectional view of the grip,
FIG. 4 is a cross-sectional view of the grip (the line IV-IV shown in FIG. 3).
5 is a cross-sectional view of the grip (a cross-sectional view taken along the line VV shown in FIG. 3), FIG. 6 is an exploded perspective view of an inner piece and an FPC heater constituting the grip, and FIG.
8 is a perspective view of the grip shown in FIG.
Is a front view of the inner piece, FIG. 9 is an explanatory view for explaining the flow of the resin at the time of molding the second inner piece, FIG. 10 is an explanatory view for explaining the forming step of the grip body, and FIG. 11 is an enlarged perspective view of the power supply cord. It is.

In these figures, reference numeral 10 denotes a cylindrical grip body whose surface is covered with rubber, which is fitted and fixed to a metal handle pipe 50 (see FIGS. 3 and 4) of a motorcycle or the like. Configure the left grip. The grip body 10 has a flexible printed wiring board heater circuit (hereinafter referred to as F) outside a cylindrical synthetic resin inner piece 20.
A PC heater 40 is wound around the grip body 10.
Is formed and integrated on the FPC heater 40 so that the FPC heater 40 extends between the inner piece 20 and the coating rubber layer 30. Reference numeral 11 denotes a flange portion formed at the end of the grip body 10 on the opening side.

As shown in FIG. 6, the inner piece 20 is assembled in such a manner that a first inner piece 20A and a second inner piece 20B, each formed in a semi-cylindrical shape, have their side edges attached to each other. It is configured in a cylindrical shape. The inner pieces 20A and 20B are made of glass fiber-mixed polybutylene terephthalate resin, have excellent heat resistance, and have high strength due to dispersed glass fibers. In addition, it may be made of glass fiber mixed polyphenylene sulfide resin having excellent heat resistance.

The first and second inner pieces 20A,
Although 20B is molded by injection molding, as shown in FIG. 9, so as the gate G ₁ is positioned on the outer peripheral surface of one corner regions of the inner piece 20B injecting molten resin into the mold, the resin And the flow of the glass fiber is directed in the longitudinal direction (axial direction) of the inner piece 20B, and the strength is increased accordingly. The same applies to the first inner piece 20A.

Annular portions 21 and 22 are formed at the front and rear ends of the first inner piece 20A so as to oppose each other in the axial direction.
Engaging concave portions 23a and 23b are formed so as to face each other, and engaging convex portions 24a and 24b formed at circumferentially central positions of the front and rear ends of the second inner piece 20B are respectively engaged with the first inner piece 20A. By engaging with the mating recesses 23a and 23b, respectively, it is assembled and integrated as a cylindrical inner piece 20, whereby the rigidity of the inner piece 20 (20A, 20B) is increased, and the molded grip body 10 is formed. However, there is no problem that the rubber layer is deformed due to contraction of the rubber layer after being taken out of the mold.

That is, as shown in FIG. 10, the grip body is formed by winding the FPC heater 40 on the inner piece 20 having the inner pieces 20A and 20B assembled into a cylindrical shape and further winding the raw rubber sheet. The lower mold 70b is housed in the upper and lower molds 70a and 70b via the core mold 72 (only the lower mold 70b is shown in FIG. 10), and the same procedure as in the conventional method (see FIG. 16) is performed. After the molding, the molded grip body is taken out of the molds 70a and 70b and cooled for a predetermined time, and the contraction force generated in the rubber layer of the grip body causes the inner piece 20 (20A, 2A) to contract.
0B) in the circumferential and axial directions. However, since the annular portions 21 and 22 are integrally provided at the front and rear ends of the inner piece 20A, the circumferential compressive force and the axial compressive force generated in the rubber layer extending between the annular portions 21 and 22 are provided. Is held by the annular portions 21 and 22 and the inner piece 2
The side edges (circumferential ends) of 0A are not easily deformed.

Further, the annular portion 2 of the inner piece 20A
A second inner piece 20B is provided between the first and the second 22 to form a cylindrical body in cooperation with the inner piece 20A. Therefore, the circumferential compressive force and the axial compressive force generated in the rubber layer extending between the annular portions 21 and 22 (the rubber layer extending along the second inner piece 20B) are equal to the second compressive force.
And the side edges (circumferential ends) of the inner piece 20A and the inner piece 20B are not deformed at all.

The thickness of the inner pieces 20A, 20B
Are both ends 20A in the circumferential direction._Two, 20B _TwoIs the central part 2 in the circumferential direction
0A₁, 20B₁It is formed thinner than
Where the handle pipe 50 is pressed into the grip body 10
When the grip body 10 is pressed into the handle pipe 50,
Smooth the handle pipe 50 to follow and elastically deform
Can be press-fitted.

That is, the annular portion 2 is attached to the inner piece 20A.
1 and 22 are provided, and an inner piece 20B is provided between the annular portions 21 and 22 so that the inner piece 20 (2
0A, 20B) constitute a cylindrical body,
This makes it possible to withstand the circumferential compressive force of the inner pieces 20A and 20B. Therefore, even if the circumferential end of the inner piece is formed to be thin, the grip body 10 taken out of the mold is deformed in the process of cooling. There is no. In particular, the inner shape of the annular portions 21 and 22 is the inner piece 20A.
Are not perfect circles because they are formed in a shape that is continuous with the inner shape of
The strength of the annular portions 21 and 22, ie, the inner pieces 20A,
The strength of 20B is increased.

The inner circumference of the inner pieces 20A, 20B
The surface is connected to and integrated with the coating rubber layer 30 and extends in the axial direction.
Rubber layer 32a (32a)₁, 3
2a _Two) Is formed. That is, the inner piece 20
A, 20B extend vertically and horizontally on the inner peripheral surface and communicate with each other
Shallow grooves 25a and 25b are formed in a lattice shape,
Direction, the rubber layer 32 (32a) having a predetermined height.₁, 3
2a_Two) Is loaded. The grooves 25a and 25b are
It is formed in an arc shape, and the flow resistance of the molten rubber is low.
And the mold 70a, 70b is filled with molten rubber smoothly
Can be done. Groove extending in the lateral direction (circumferential direction)
25b is a groove functioning as a passage for molten rubber.
The formed rubber layer 32b is
A and 20B are formed flush with the inner peripheral surface.

Reference numerals 23c and 24c denote inner pieces 2
When the inner pieces 20A, 20B are assembled in a cylindrical shape by the notches formed in the side edges of the first openings 23A, 20B, respectively, the first openings 23 cooperate as shown in FIG.
When the grip body 10 is formed, molten rubber flows into the grooves 25a and 25b from the opening 231 to form
A rubber layer 32a for pipe pressing is formed.

The notches 23c and 24c have a rectangular shape, but have Rs at their corners, so that
The strength of the periphery of c and 24c is increased. Also the second
Front and rear edge portions of the inner piece 20B and the annular portions 21 and
2, the second opening 232 for inflow of the molten rubber,
232 are formed, and the grooves 25a, 25a,
The molten rubber flows into the inner pieces 20A, 2B.
The molten rubber can be filled into the inside and outside corners of OB in a short time.

In the grip body forming step, the core mold 72 is provided at four positions on the inner peripheral surface of the front end side annular portion 21 in the circumferential direction.
An abutment portion 26a for positioning an inner piece is provided which abuts on the outer peripheral surface of the grip body. The inner peripheral edge of the front end side annular portion 21 is engaged with a core mold 72 to form the grip body molding mold 7.
0a, 70b with respect to the inner piece 20 (20A, 20A).
A notch 26b for positioning B) in the circumferential direction is provided, whereby the inner piece 20 (20A, 20B) is accurately positioned and fixed at a predetermined position in the molding dies 70a, 70b.

As shown in FIGS. 1 and 3, a rubber layer formed on the inner peripheral surface of the front end side annular portion 21 except for the inner piece positioning contact portion 26a extends to the entire periphery of the opening edge. When the handle pipe 50 is pressed into the grip body 10, the rubber layer formed inside the inner piece 20 (20A, 20B) is hardly peeled off.

The rear end side annular portion 22 is positioned in the axial direction by abutting the grip body forming dies 70a and 70b to position the inner piece 20 (20A, 20B) in the grip body forming step. Uneven portion 2 for allowing water to flow into inner pieces 20 (20A, 20B)
6c is provided, the convex portion 26c ₁ functions as an abutment positioning portion, the concave portion 26c ₂ functions as an opening for the molten rubber flows into the inner piece inside.

As shown in FIG. 4, the width d ₂ of the rubber layer 32a ₂ for pipe pressing extending in the axial direction inside the second inner piece 20B is equal to the width d ₂ in the inside of the first inner piece 20A. The grip body 1 is made larger than the width d _{1 of the} pipe pressing rubber layer 32a ₁ extending to
The structure is such that the adhesive strength between the handle pipe 50 and the handle pipe 50 is ensured and the heat insulation is maintained. That is, on the inner piece 20A side, the heat insulating property is emphasized, and on the inner piece 20B side, the adhesive strength is emphasized, and both the heat insulating property and the adhesive strength are satisfied.

The handle pipe 50 and the rubber layer 32a
The contact area between the first inner piece 20A side is smaller than the second inner piece 20B side, that is, the area of the air heat insulating layer formed between the handle pipe 50 and the inner pieces 20A and 20B is 1 inner piece 2
When the grip body 10 is gripped by hand (see the imaginary line in FIG. 5), the first inner piece 20A to which the fingertips are applied is designed to be larger on the 0A side, so that the heat does not escape and relaxes.

The coating rubber layer 30 and the inner piece 20
The FPC heater 40 extending between (20A, 20B)
The copper foil strip pattern P has a cross-sectional structure in which a base film and an over film are laminated, and when developed, is formed in a substantially rectangular shape as shown in FIG. As shown in FIG. 6, a lead-out portion 41 for power supply connection is formed at one longitudinal side edge of the FPC heater 40, and the lead-out portion 41 includes:
Two exposed lands R ₁ and R _{2 of} copper foil are formed in contact with the meandering conductive foil strip pattern P acting as a heat source, and each land R ₁ and R ₂ has a battery as a power source. Is connected by solder welding. Reference numeral 43 denotes a solder weld.

The FPC heater 40 has a first heater circuit pattern P ₁ formed thereon and a first inner piece 2.
A first heater area 40A magnitude of which corresponds to 0A, the second heater circuit pattern P ₂ is formed, the second heater region 4 having a size corresponding to the second inner piece 20B
0B are integrally formed. First heater area 40
A is formed long enough in the axial direction so that the entire fingertip of the hand can be loosened, and the second heater area 40B is formed so as not to block the second opening 232 for inflow of the molten rubber. Is formed shorter in the axial direction than the heater region 40A. Then, the FPC heater 40 is positioned and the inner piece 2 is positioned.
When wound around 0 (20A, 20B), the first and second heater regions 40A, 40B become inner pieces 20A, 20B.
Respectively.

The first heater circuit pattern P ₁ corresponding to the inner piece 20 A and the second inner piece 2
The second heater circuit pattern P ₂ corresponding to 0B has been connected in the circuit connecting portion P _3, P _3, the circuit connection portion P _3, P _3, the time of assembling the grip body 10 on the handle pipe 50 The grip body 1 is located on the front end side of the inner piece 20A, which is the least deformable part.
When 0 is grasped by hand, it is located near the thumb, and the circuit connection portions P ₃ and P ₃ are hardly disconnected by an external load. That is, the rear end side of the inner piece 20, particularly the rear end side of the second inner piece 20B, is pushed by the front end of the handle pipe 50 to be press-fitted, and a large load acts. On the front end side of the inner piece 20A, The acting load is small, and the risk of disconnection is also small.

Reference numeral R ₃ is a conductive foil land that does not function as a heater circuit pattern, and is used to reinforce the FPC heater 40. Reference numeral 40b is a hole provided by dotted Shirubehaku land portion R ₃ of the FPC heater 40, rubber layer inner piece 20A, 2 through the hole 40b
OB directly bonded to the FPC heater 40 and the inner piece 20 to prevent the FPC heater 40 from lifting.
The adhesive strength between A and 20B is increased.

The extending direction of the conductive foil strip formed on the FPC heater 40 extends mainly in the horizontal direction (the circumferential direction of the inner pieces 20A and 20B).
Vertical wrinkles are less likely to occur. Code 45
Is a long hole corresponding to the first opening 231 for inflow of the molten rubber provided in the inner piece 20A.
Is formed one size larger than the first opening 231, and the disposition position of the FPC heater 40 is
Even if it slightly deviates from (20A, 20B), the opening 231 is closed to prevent the inflow of the molten rubber.

Reference numeral 46 denotes a slot 4 at the position where the slot 45 is formed.
The band-shaped conductive foil non-formation region extending in the same direction as the long hole 45 so as to bridge the holes 5 and 45 has an effect of increasing the flexibility of the FPC heater 40. A pair of flanges 33 and 34 are formed on the outer periphery of the annular portion 21 formed at the front end of the inner piece 20A.
Is provided. As shown in FIG. 3, the inner flange 34 has a width (height) and a plate thickness of the outer flange 3.
3 so that when the inner piece 20A is embedded in the rubber layer, the inner piece 20A does not easily protrude on the rubber layer inclined surface 11a of the flange portion 11 provided on the annular portion 21.

As shown in FIG. 7, a portion of the inner flange 34 corresponding to the circumferential center of the inner piece 20A is notched, and a pair of pins 4
2, 42 are projected. Then, the holes 40a, 40a (see FIGS. 6 and 7) formed in the lead-out portion 41 of the FPC heater 40 are engaged with the pins 42, 42, so that the FPC heater 4 is connected to the inner piece 20 (20A, 20B).
0 can be positioned. In addition, R is attached to the corner end 34 a of the flange 34 cut out and the tip of the pin 42, so that the FPC heater 4 is wound when the FPC heater 40 is wound.
0 is not hurt.

Further, in a state where the FPC heater 40 is wound around the inner piece 20 (20A, 20B), the solder welding portions 43, 43 are sandwiched between the outer flange 33 and the pair of pins 42, 42 (FIG. 7). ), And the structure is such that other members do not easily come into contact with the solder welds 43, 43. In the grip body 10, the solder welds 43, 43 are held by hand as shown in FIG.
It is also a position where the gripping force is less likely to act when gripping 0. Further, when forming the grip body, the mold 7
0a and 70b, the solder weld 43 faces downward,
The load acting on the solder weld 43 due to mold clamping is also small.

The power supply cord 44 soldered to the FPC heater 40 is disposed in the cord arrangement groove 27 and goes around the annular portion 21, and is formed integrally with the annular portion 21 so as to cross the groove 27. After passing through the cord support portion 28, it is led outside the radius of the annular portion 21. The cord 44 is folded back at the cord support 28 and derived,
Since the external force acting on the cord 44 is received by the cord supporting portion 28, no load due to the external force acts on the solder welded portion 43.

A part of the inner flange 34 is formed at the same height as the outer flange 33,
Is composed of a bridge provided at the same height. Since the contact surface 28a of the cord support portion 28 with the cord 44 extends in parallel with the axial direction, the cord 44 can be led out in a direction perpendicular to the axial direction without tilting. Further, the cord contact surface 28a of the cord support portion 28 is formed such that its longitudinal and lateral cross sections are arc-shaped, so that the cord 44 is not damaged.

The cord 44 is a silicon-coated cord, and is superior in weather resistance, heat resistance and flexibility as compared with a conventional vinyl-coated cord. Further code 44
As shown in FIG. 11, the silicon cabtire cord 44 has a cabtire cable structure, and when the grip body is formed (see FIG. 10), the soft silicon coating portion is compressed by rubber pressure in the silicon cabtire cord 44. , 70b flows out of the gap between the cord insertion hole 74 formed in the mold 70b and the compressed cord 44, so that the pressure acting on the cord 44 can be released. Therefore, there is no problem that the cord 44 is cut by the pressure of the rubber when the grip body is formed.

Next, the forming process of the grip body 10 will be described with reference to FIG. First, the inner piece 20
A primer and an adhesive are applied to the inner and outer peripheral surfaces of A and 20B, and a primer and an adhesive are also applied to the front and back surfaces of the FPC heater 40. And the inner pieces 20A, 20B
To form a cylindrical inner piece 20, on which an FPC heater 40 is wound, and on which a raw rubber sheet is wound. The FPC heater 40 and the inner piece 20 on which the raw rubber sheet is wound are assembled to the core mold 72, and are positioned and accommodated at predetermined positions in the molds 70a and 70b.

FIG. 10 shows that the inner piece is a lower mold 70b.
FIG. 74 is a plan view of a state in which it is positioned and housed in the inside, and reference numeral 74 denotes a code insertion hole provided in the mold, reference numeral G
₂ is a gate for injecting molten rubber. And mold 70
a and 70b are brought into close contact (clamping), and when the temperature in the mold reaches the melting temperature of the rubber, the molten rubber flows into the molds 70a and 70b. Mold 70a from the gate G _2, 70b
The molten rubber flowing into the inside presses the flanges 33, 34 of the inner piece 20 against the mold, so that the molds 70a, 7
Within 0b, the inner pieces 20A, 20B are stable and can be smoothly filled with rubber. After a lapse of a predetermined time, when the rubber is vulcanized, the molds 70a and 70b are opened, the formed grip body 10 is taken out, and cooled.

FIGS. 12 and 13 show a right grip (throttle grip) with a built-in heater according to a second embodiment of the present invention. FIG. 12 is a cross-sectional view of the grip (FIG. 4 in the first embodiment). FIG. 13 is an enlarged sectional view of the rubber layer inside the inner piece. In the first embodiment described above, the grip body 10 is directly fitted to the handle pipe 50, but in the second embodiment,
A throttle pipe 60 is fitted and integrated into the grip body 10A to form a throttle grip, and the throttle pipe 60 is assembled to the handle pipe 50.

Rubber layer 3 loaded in shallow grooves 25a, 25b formed inside inner pieces 20A, 20B
2c, as shown in FIG. For this reason, the rubber layer 32c is
By contacting with 0, the adhesive strength between the grip body 10A and the throttle pipe 60 is increased, and a wide heat insulating air layer 62 is formed between the grip body 10A and the throttle pipe 60, so that the airflow to the throttle pipe 60 side can be improved. The structure is such that heat transfer is suppressed.

The other parts are the same as those of the above-described embodiment. In the above-described embodiment, the inner piece 20 for reinforcing the FPC heater embedded in the grip body 10 has a structure in which two semi-cylindrical inner pieces 20A and 20B are assembled into a cylindrical shape. However, as in the conventional structure shown in FIGS. 14 and 15, a semi-cylindrical inner piece in which an FPC heater is wound and integrated is embedded in the grip body,
A grip structure in which the side facing the inner piece is formed only of the rubber layer may be used.

Further, in the above-described embodiment, the planar heater embedded and integrated in the grip body has been described as the FPC heater. However, the heater embedded in the grip body is not limited to the FPC heater. Other configured planar heaters may be used.

[0041]

As is clear from the above description, according to the grip with a built-in heater for a vehicle according to the present invention, the inner piece integrally provided with the annular portion has the contraction force of the rubber layer after the formation of the grip body. , The manufactured grip body does not become distorted, and the defective product occurrence rate decreases. Also, since the annular part is provided only in part of the inner piece,
The handleability of the handle body (throttle pipe) of the grip body is not impaired, and the annular portion acts as a guide for inserting the handle pipe (throttle pipe). The assembling workability is also improved. According to the second aspect, the annular portion provided at the front and rear ends of the inner piece further increases the rigidity of the inner piece and further suppresses deformation of the grip body after molding. Is further reduced.
In addition, the handle pipe (throttle pipe) is guided by the rigid annular portion twice when it is pressed into the grip body and when it is further inserted, so that the workability of assembling the grip body to the handle pipe (throttle pipe) is further improved. It will be good. According to the third aspect, since the second inner piece and the front and rear annular portions prevent the rubber layer region on the side facing the inner piece from contracting and deforming in the circumferential direction and the axial direction, the grip body after molding is formed. No deformation is observed at all, and the incidence of defective products is significantly reduced. Also the second
Since the inner piece and the inner piece are not directly fixed, the grip body can follow the movement of the press-fit handle pipe (throttle pipe). In addition to the front and rear annular parts, a cylinder consisting of the inner piece and the second inner piece Since the entire body functions as a guide for inserting the handle pipe (throttle pipe), the workability of assembling the handle pipe (throttle pipe) is also very good. According to the fourth aspect, since the contraction deformation in the axial direction of the rubber layer facing the inner piece is reliably prevented, the defective product occurrence rate is reduced accordingly. According to the fifth aspect, the filling time of the molten rubber at the time of forming the grip body can be shortened, so that the molding step can be shortened. Claims 6, 7,
According to 8, since the inner piece can be accurately positioned in the mold, a rubber layer having an appropriate thickness can be formed over the entire grip body.

[Brief description of the drawings]

FIG. 1 is a perspective view of a left grip with a built-in heater according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the grip with a part omitted.

FIG. 3 is a longitudinal sectional view of the grip.

FIG. 4 is a cross-sectional view of the grip (a line IV-I shown in FIG. 3).
Sectional view along V)

FIG. 5 is a cross-sectional view of the grip (a cross-sectional view taken along line VV shown in FIG. 3).

FIG. 6 is an inner piece and an FPC constituting the grip.
Exploded perspective view of a heater

FIG. 7 is a perspective view of the grip shown in FIG. 2 as viewed from below.

FIG. 8 is a front view of the inner piece.

FIG. 9 is an explanatory view illustrating the flow of resin during molding of the second inner piece.

FIG. 10 is an explanatory view illustrating a molding step of the grip body.

FIG. 11 is an enlarged perspective view of a power supply cord.

FIG. 12 is a cross-sectional view of a right grip with a built-in heater according to a second embodiment of the present invention (a diagram corresponding to FIG. 4 in the first embodiment);

FIG. 13 is an enlarged sectional view of a rubber layer inside the inner piece.

FIG. 14 is a longitudinal sectional view of a conventional grip with a built-in heater.

15 is a cross-sectional view of the grip with a built-in heater (a cross-sectional view taken along line XV-XV shown in FIG. 14).

FIG. 16 is a cross-sectional view illustrating a mold clamping step when forming the grip body.

[Explanation of symbols]

10, 10A Grip main body 20 Inner piece 20A First inner piece 20B Second inner piece 21 Front end annular portion 22 Rear end annular portion 23a, 23b, 24a, 24b Between the first inner piece and the second inner piece Concavo-convex engagement portions 25a, 25b Grooves inside inner piece 26a Abutment portion with core mold provided on front end side annular portion 26b Notch for circumferential positioning provided on front end side annular portion 26c Rear end side annular portion Uneven portions 32 (32a, 32b), 32c provided in the portion Rubber layer 40 inside the inner piece 40 FPC heater as a planar heater 50 Handle pipe 60 Throttle pipe 231 Slit (opening) for rubber inflow between inner pieces 232 Slit (opening) for rubber inflow between the second inner piece and the annular part

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62J 33/00 B62K 23/04

Claims (8)

(57) [Claims] 1. A heater for a vehicle in which a substantially semi-cylindrical synthetic resin inner piece having a planar heater wound on the outer periphery is embedded and integrated in a cylindrical rubber grip body attached to a handle pipe. In the grip, at a predetermined position in the axial direction of the inner piece, an annular portion that functions as a guide for inserting a handle pipe or a throttle pipe while integrally preventing deformation of the inner piece due to contraction of the rubber layer after molding the grip body is integrally formed. A grip with a built-in heater for a vehicle, wherein the grip is provided. 2. The grip with a built-in heater for a vehicle according to claim 1, wherein the annular portion is provided so as to face front and rear ends of an inner piece. 3. A synthetic resin second inner piece having a substantially semi-cylindrical shape is disposed between the front and rear annular portions, and both inner pieces constitute one cylindrical body. Grip with built-in heater for vehicles. 4. The grip with a built-in heater for a vehicle according to claim 3, wherein a circumferential central portion of the front and rear ends of the second inner piece engages with the front and rear annular portions. 5. A slit for allowing molten rubber to flow into the inner piece in the grip body forming step is provided between the second inner piece and the inner piece and / or between the second inner piece and the front and rear annular portions. The grip with a built-in heater for a vehicle according to claim 3 or 4, wherein: 6. The inner peripheral surface of the front end side annular portion is provided with an abutting portion for positioning an inner piece which abuts on a core metal mold in a grip body forming step. Grip with built-in heater for vehicles. 7. A notch for engaging the core mold and positioning the inner piece in the circumferential direction with respect to the grip body forming mold is provided on an inner peripheral edge of the front end side annular portion. The grip with a built-in heater for a vehicle according to claim 2. 8. The concave / convex portion on the rear end side annular portion, which abuts a grip body molding die to axially position the inner piece and allows molten rubber to flow into the inner piece in the grip body molding step. 3. The grip with a built-in heater for a vehicle according to claim 2, wherein a grip is provided.