JPH07115641B2 - Method for coating the surface of a curved body with leather and a curved body with the surface covered with leather - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The invention of the present application is, for example, a method for covering a curved body surface with a leather, which is used for a steering wheel (steering wheel-steering wheel), a change lever knob (shift rod head), and the like of an automobile covered with leather, and a method for covering the surface by the method. The present invention relates to a curved surface body covered with leather.

[Prior art]

Conventionally, a curved surface body whose surface is covered with leather-for example, a steering wheel or a change lever knob whose entire surface is covered with synthetic leather has been widely known and used before the patent application of the present invention. Kaisho 62-92816
Bulletin (Method for manufacturing whole-skin wrapped handle) and Shokai 61-1418
6 It is also described in public relations (steering wheels). Further, the above-mentioned conventional technology will be described as follows, taking an annular steering wheel (abbreviated as a steering wheel) for steering an automobile as an example. In other words, an aggregate that is made of synthetic resin or the like in a flat plate shape that has flexibility and a uniform thickness, and has an aluminum alloy or the like whose cross section is a perfect circle or an ellipse, and a perfect circular ring in a plane. The area of the main body of the handle made of synthetic resin such as urethane (abbreviated as the handle body) that is tightly fixed around the periphery of the handle is cut into one or more elongated rectangles, and the entire surface of the handle body is cut by the leather. After coating, 1. Manually coat the leather so that the leather faces the inner and outer diameter sides of the flat ring of the handle body and tightens the leather near the cut end surfaces of the mating and contacting joints. The sutures are sewn to each other with a synthetic resin thread, or the cut end surfaces of the joint portion of the leather are adhered to each other with an adhesive, or the suture and the adhesion are used together.

[Problems to be Solved by the Invention]

However, the above-mentioned conventional technique causes the following defects at the joint. In the suturing method using the thread of 1), since the thread is exposed on the surface of the leather, frictional wear caused by contact of fingers and palms, change of heat and humidity, penetration of fat, and heat and humidity of the atmosphere. The thread tightening loosens or thread breakage occurs due to repeated changes of the above, and both cut end surfaces of the joint part of the leather are close to each other at the beginning of the suture of the thread, but due to the change with time of the leather and the thread, Due to changes in the heat and humidity of the palm and the atmosphere that enter into the interior and create gaps, the knots and terminals of the threads loosen and melt, and the vicinity of the thread sutures at both joints of the leather is sutured. Due to the tension and the surplus of the leather because the diameter is smaller than the outer circumference when the sewn portion is the inner circumference of the flat ring of the handle body, the stitching is performed along the circumferential surface in the diametrical direction of the cross section of the handle body. Since the seams are hollow and protrude between the seams, the protruding parts are worn due to contact with the palm. . Further, in the method of adhering both joint surfaces with the adhesive of 2), the adhesive surface deteriorates due to the contact of fingers or palms and the permeation of repeated changes of heat and humidity of the atmosphere. The joint surfaces are separated from each other and the adhesive surface is separated from the handle body. Since the handle body is continuously grasped by the palm and fingers, the stitches of the thread exposed on the surface of the leather and the gap between the two joint surfaces, the irregularities on the leather surface, and the handle body on the adhesive surface Due to the peeling, the leather surface feels uncomfortable and feels uncomfortable except in the vicinity of the joint surface, and the handle operation function is hindered, and the safety is reduced. Further, since the suture tightening around the leather joint portion by the sewing thread must be performed manually after covering the handle body with the leather, the work efficiency is poor and it is extremely difficult to mass-produce uniform quality, which is very expensive. . An object of the present invention is to provide a curved surface body whose surface is covered with leather so as to eliminate the above-mentioned drawbacks of the prior art.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is characterized in that a curved body whose surface is covered with leather is obtained by the steps in the following order. (1) Covering the entire surface of a rigid curved body having a flat curved leather having flexibility and a uniform thickness and having a curved curved surface having a circular cross section and a circular ring on the same plane. Cut into a rectangle that is a little wider than the area, and (2) make the longitudinal length of the leather, and the inner circumference of the circular ring of the curved body corresponding to both lateral ends of the leather that contact each other to cover the curved body. Or, it is molded to the surface length of the outer circumference, (3) cut the leather in the lateral direction and cut a little longer than the surface of the cross section of the curved body, and (4) cut both inner surfaces near both cut edges of the leather. Then, it is closely attached and fixed to each of the rigid inserts having the same length and width as the longitudinal direction, and (5) Both the contact surfaces of the leather are attached, and the inner end of each insert is inserted separately as a fulcrum. Bend at a right angle to the inner side of the leather along with the body. (6) Put both bent parts of the leather and both inserts so that both outer parts of both bending fulcrums are in close contact. To form a curved surface that is the same as the other outer surface, fix it by inserting it closely into the long groove with the entire circumference of the inner or outer circumference of the ring of the curved body and the depth into which both inserts are immersed, (7) The entire inner surface of the leather except for both bent portions is firmly attached to the entire surface of the curved body.

[Action]

The present invention has the following effects due to the above configuration. 1) There is nothing exposed or protruding on the surface of the leather that covers the handle body. 2) Both cut end surfaces of the leather facing each other are fixed inside the long groove of the handle body and are not exposed as a gap on the surface of the handle body. 3) The outer surface of the part of the handle body that is inserted into the long groove of the leather does not have unevenness in the cross-sectional direction along the outer or inner peripheral surface of the flat ring of the handle body.

【Example】

Embodiments of the present invention will be described with reference to the drawings. Figure 1 shows the steering wheel of an automobile.
FIG. 2 is a plan view showing a handle body 1 that forms a substantially circular ring in a plane and has a cross section of a perfect circle or an ellipse, and a center 3 of the ring of the handle body 1 on the inner peripheral surface 2 of the handle body 1. A stay 4 protruding in the direction, a rib 5 for fixing a steering mechanism (not shown) including the center 3, and a link 6 for connecting and fixing the stay 4 and the rib 5 are provided. As shown in FIG. 2, the present invention covers and fixes one or a plurality of leathers on the entire curved surfaces of the handle body 1 and the stay 4 in the following order of steps. 1) As shown in FIG. 4, a flat leather 8 having flexibility and a uniform thickness is prepared. 2) As shown in FIG. 1, a rigid curved body 1 having a curved surface whose cross section is a perfect circle or an ellipse and a perfect circular ring is formed on the same plane is prepared. 3) As shown in FIG. 1, a long groove 7 opening along the entire circumferential surface of the inner peripheral surface 2 or the outer peripheral surface 1 ′ of the circular ring of the curved body 1 and on the center line to the center 3 of the circular ring. Dig in. 4) As shown in FIG. 5, two inserts 10a, 10b having the same length as the lengthwise direction of the leather 8 are prepared. 5) As shown in FIG. 6, two tapes 11a and 11b which have the same length as the lengthwise direction of the leather 8 and have the same width as the width near both ends of the leather 8 and which can be adhered on both sides. To prepare. 6) As shown in FIG. 7, leather 8 is cut to make cutting ends 12a to 12d slightly wider than the area covering the entire surface of curved body 1 in the longitudinal direction. 7) As shown in FIG. 8, the vertical length of the leather 8 (12c-1
2d) to form the surface length of the inner circumference 2 or the outer circumference 1'of the circular ring of the curved surface body 1 corresponding to the two cutting edges 12a, b in the lateral direction to contact each other in order to cover the curved surface body 1. Forming end 14a,
Forming 14b. 8) As shown in FIG. 9, the length of the leather 8 in the lateral direction (8th
12a-12b in the figure, and a cross section of the curved body 1 (Fig. 1A-
The cut ends 15a and 15b are formed by cutting into a length slightly longer than the surface of A ') with a certain width added. 9) As shown in FIG. 3, the inner surfaces of the leather 8 having a constant width in the vicinity of the cut ends 15a and 15b are formed, and the cut surfaces 13a and 13b are formed by gradually reducing the thickness toward the cut ends. To do. 10) As shown in FIG. 10, the inner surfaces of both reduction surfaces 13a and 13b of the leather 8 are placed, the tapes 11a and 11b are individually adhered and temporarily fixed, and then the inserts 10a and 10b are separately sewn. And fix it. 11) As shown in FIG. 2, the reduction surfaces 13a, b of the leather 8 and the tapes 11a, b and the inserts 10a, b are provided, and both inserts 10a,
The inner end of b is used as a fulcrum and is bent at a right angle toward the inside of the leather 8 with the inserts 11a and 11b to form bent portions 16a and 16b. 12) As shown in FIG. 2, the folded portions 16a, b of the leather 8 and the inserts 10a, b of the leather 8 are arranged so that the outer side portions 17a, 17b of the folded portions are in close contact with each other. Insert closely to the inner surface of the long groove 7 of the curved body 1 so as to form the same curved surface as the outer surface, and fix the outer surfaces of both inserts 10a, 10b to the inner surface of the long groove 7 with an adhesive. To do. 13) As shown in FIG. 2, all the inner side surfaces of the leather 8 excluding both bent portions 16a and 16b are closely attached to the entire surface of the curved body 1 and fixed by an adhesive. 14) As shown in FIG. 2, the outer side portions 17a and 17b of the both bent portions 16a and 16b of the leather 8 and the vicinity thereof are formed to form the inner and outer peripheral surfaces of the ring of the curved body 1 and the outer periphery of the cross section. The leather 8 is shaped by shrinking or stretching the leather 8 or pressing it against the surface of the curved body 1 so as to be parallel to the surface by blowing hot air.

【The invention's effect】

Since the invention of the present application has the above-mentioned configuration, it has the following effects. 1) The cut end surface 12 of the leather 8 is fixed to the insert body 10 fixed inside the long groove 7 of the handle body 1 and the surface of the handle body 1 is not exposed. There is no fear. 2) Since both outer side surfaces of both bent portions 16 and 16 'of the leather 8 are in close contact with each other to form the same smooth curved surface as the other outer side surfaces, the same as in the embodiment of the present invention described above. Moreover, since there is no suture protruding on the surface, there is no possibility of damaging it. 3) The outer peripheral portions 17a and 17b of the two bent portions 16 and 16 'of the leather 8 are in close contact with each other, and there are no gaps or exposed objects and unevenness, so that the outer surface of the leather 8 feels the same. Since the handle has a good feel, the operating function of the handle is maintained well and its safety is also improved. 4) Since the stitching and tightening of the leather by the manual sewing thread is not required, the efficiency of the covering operation is improved and the quality of the product is uniform, which is suitable for mass production and the cost is reduced.

[Brief description of drawings]

Fig. 1 ... Plan view Fig. 2 ... AA 'cross-sectional view of Fig. 3 Fig. 3 ... Cross-sectional view of leather 8 along a longitudinal direction with some parts omitted Fig. 4 ... leather 8: Plan view 5: Insert body 10a, 10b plan view 6: Tape 11a, 11b plan view 7: Leather 8 plan view 8: Leather 8 plan view Fig. 9: Plan view of the leather 8 Fig. 10: Cross-sectional view of the leather 8 along the longitudinal direction in which the leather 8, the reduction surface 13a, the tape 11a, and a part of the insert 10 are omitted. Handle body), 2 ... Inner surface of curved body 1, 3
…… Center of curved body 1, 4 …… Stay, 5 …… Rib, 6 …… Link, 7 …… Long groove, 8 …… Leather, 10a, b …… Insert, 11a, b …… Double-sided adhesive tape, 12a, b, c, d …… Cut end, 13a, b …… Reduction plane, 1
4a, b …… Molding end, 15a, b …… Cut end, 16a, b …… Bending part, 17
a, b …… Outer periphery

Claims (4)

[Claims] 1. A flat-faced leather having flexibility and a uniform thickness, wherein the entire surface of a rigid curved body having a curved surface having a circular cross section and a circular ring on the same plane. Cut into a rectangle that is a little wider than the area to be covered, and make it the length of the leather in the longitudinal direction, and the inner circumference of the ring of the curved body corresponding to the lateral ends of the leather that come into contact with each other to cover the curved body. Or shape it to the surface length of the outer circumference, cut the leather in the lateral direction and cut it a little longer than the surface of the cross section of the curved body, and make both inner surfaces of a certain width near both cut edges of the leather, It is sewn and fixed to each of the inserts with the same length in the longitudinal direction, and the leather is sewn on both sides, and the inner end of each insert is used as a fulcrum for each of the inserts. Bend at a right angle toward the inner side, and make both leather bends and both inserts so that both outer sides of both folding fulcrums are in close contact with the other outer side. To form a surface, a long groove is formed along the entire circumference of the inner or outer circumference of the ring of the curved body and on the center line to the center of the ring, with a depth that allows both folded curved surfaces and both inserts to be immersed. A method of covering the surface of a curved body by closely inserting and fixing it, and then fixing all the inside surfaces of the leather, excluding both bent parts, to the entire surface of the curved body. 2. A flat-shaped leather having flexibility and a uniform thickness, and the entire surface of a rigid curved body having a curved surface having a circular cross section and an annular ring on the same plane. Cut into a rectangle that is a little wider than the area to be covered, and make the length of the leather in the longitudinal direction so that the inner circumference of the ring of the curved body corresponding to the two lateral ends of the leather that come into contact with each other to cover the curved body or Form the outer peripheral surface length, cut the leather in the lateral direction and cut it a little longer than the surface of the cross section of the curved body, and make both inner sides of a certain width near both cut edges of the leather, and Sew it on each of the inserts with the same length in the longitudinal direction and fix it, and make both stitching surfaces of the leather, and with the inner end of each insert as a fulcrum, the inside of the leather Bend at a right angle to the side, and make both bent parts of the leather and both inserts, and both outer parts of both bending fulcrums are in close contact with the other outer surface To form a groove along the entire circumference of the inner or outer circumference of the ring of the curved body and on the center line to the center of the ring, and close to the long groove with a depth that allows both folded curved surfaces and both inserts to be immersed. Then, insert and fix it, and fix all the inner side surfaces of the curved body except for the two bent parts of the leather to the fixed surface, and both outside of both bent parts of both stitched parts with both leather inserts. A method for covering the surface of a curved body by shaping the side surface and its vicinity so as to be parallel to the inner and outer peripheral surfaces of the circular ring of the curved body and the outer peripheral surface of the cross section. 3. A rectangular plate-shaped leather having flexibility and uniform thickness, a rigid curved body having a circular curved cross section and a curved surface forming a ring on the same plane, and a ring of curved body. It has a long groove that opens along the entire circumference of the inner or outer circumference and on the center line to the center of the annulus, and separate inserts that have the same length as the length of the leather. Cut into a rectangle that is slightly wider than the area covering the whole body surface, and make it the length of the leather in the longitudinal direction, and the curved surface corresponding to the two lateral end surfaces of the leather that should touch each other to cover the body. Form the surface length of the inner or outer circumference of the ring of the body, cut the length of the leather in the lateral direction and cut it slightly longer than the surface length of the cross section of the curved body. The inner surface is sewn and fixed to each insert separately, and the two sewn parts of the leather are attached to support the inner end of each insert separately. Bend at a right angle to the inner surface of the leather with the insert, and make both bent parts of the leather and both insert parts, and both outer parts of both bending fulcrums closely contact with the other outer surface. It is fixed by inserting it closely into the long groove of the curved body so as to form the same curved surface, and firmly fixing all the inner side surfaces of the leather except for both bent parts to the entire surface of the curved body. Covered curved body. 4. A rectangular flat leather having flexibility and a uniform thickness, a rigid curved body having a circular curved cross section and a curved surface forming a circle on the same plane, and a circular ring of curved body. The long groove along the entire circumference of the inner or outer circumference and opening on the center line to the center of the annulus, each separate insert having the same length as the longitudinal length of the leather, and the longitudinal length of the leather It has the same length and separate tapes that have the same width near both ends in the lateral direction of the leather and can be adhered on both sides, and the leather has a rectangular shape slightly wider than the area covering the entire surface of the curved body. Cut the length of the leather in the longitudinal direction, and make the surface length of the inner or outer circumference of the circular ring of the curved body corresponding to the both lateral ends of the leather that should contact each other to cover the curved body. After molding, cut the length of the leather in the lateral direction and cut it slightly longer than the surface length of the cross section of the curved body, Cut the inner side surfaces near the stump, and gradually reduce the thickness toward both cut end surfaces.Hold the inside of both cut surfaces of the leather, temporarily fix the tape, and then sew each insert to secure it. , Sew both parts of the leather, and bend them at a right angle toward the inner surface of the leather with the inserts using the inner end of each insert as a fulcrum. Then, close both sides of both folding fulcrums so that they form the same curved surface as the other outer side, and insert them closely into the long groove of the curved body to fix them. All inner side surfaces except for are firmly attached to the entire surface of the curved body, and the outer and inner sides of the curved surface of the curved body are placed on both outer sides and the vicinity of both bent parts of the leather, and the outer circumference of the cross section. A curved body that is shaped so that it is parallel to the surface, and the surface is covered with leather.