JPH03246163A - Leather winding method of leather winding steering wheel and leather diameter increasing device therefor - Google Patents

Abstract

PURPOSE:To easily install leather on a steering wheel ring portion so as to improve the efficiency of a leather winding work by increasing the diameter of annular leather by a leather diameter increasing device in a leather diameter increasing process. CONSTITUTION:In case of increasing the diameter of an annular leather 30 using a leather expansion device 100, an elevating member 120 is disposed in the lower end position, the respective expansion pieces 131 are positioned on the inner peripheral side to be of the minimum diameter. In such a condition, leather 30 is applied to the outer peripheral surface 132 of each expansion piece 131. When an air cylinder 150 is operated to move the elevating member 120 upward, each expansion piece 131 is subjected to pressing force to the outside in the radial direction and guided by a guide mechanism 140 in contact with the outer peripheral surface 121 of the elevating member 120 on the inner peripheral surface 131a to be moved along the outside in the radial direction, whereby the diameter in each expansion piece 131 is increased. With such increase in diameter, the annular leather 30 is drawn and uniformly expanded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a leather-wrapping method for a leather-wrapped steering wheel and a leather diameter expanding device thereof, specifically a method for wrapping leather around at least the outer peripheral surface of a ring portion of a steering wheel;
and a device for expanding the leather used to carry out this method.

<Prior art> From the viewpoint of improving the design of the steering wheel, a leather-wrapped steering wheel in which at least the ring portion of the steering wheel is wrapped (covered) with a skin such as natural leather or artificial leather is installed in an automobile, etc. There is.

Conventionally, various methods have been known as methods for coating a steering wheel with leather (Japanese Patent Laid-Open No. 62-20120
(See Publication No. 9). An example of this would be to join the ends of a strip of leather by sewing or gluing to create a ring-shaped piece of leather with an inner diameter slightly smaller than the outer diameter of the steering wheel. Hook a part of the inner circumferential surface of the leather onto a part of the outer edge of the ring part of the steering wheel, and in this state, pull the leather to expand the diameter while attaching the leather to the entire outer periphery of the ring part. A known method is to cover a steering wheel with leather by joining both side edges of the leather by sewing or gluing.

<Problems to be Solved by the Invention> However, in the above conventional example, as is clear from the above explanation, a part of the annular leather is hooked on a part of the outer edge of the ring part, and the leather is held in this state. Since it had to be pulled to the opposite side and expanded in diameter, care had to be taken to ensure that the hooks did not come loose or that the leather did not stretch in just one part.

Therefore, there is a problem in that the work of wearing this leather is complicated.

In view of this problem, it is an object of the present invention to provide a leather wrapping method that can improve workability.

Another object of the present invention is to provide a leather diameter expanding device which is suitable for carrying out the leather wrapping method and is capable of uniformly expanding the diameter.

<Means for Solving the Problem> In order to solve the former problem, a leather wrapping method for a leather-wrapped steering wheel according to the present invention is a leather wrapping method in which the outer periphery of at least the ring portion of the steering wheel is coated with leather, a circular leather making process in which both ends of a belt-shaped leather are joined to create a circular leather; a leather diameter expanding process in which the circular leather is expanded in diameter using a leather diameter expanding device; The present invention is characterized by comprising a leather covering step of covering at least the outer periphery of the ring portion of the steering wheel with the leather.

In order to solve the latter problem, the leather diameter expanding device according to the present invention includes a base, a truncated cone-shaped vertically movable member disposed at the center of the base so as to be movable vertically, and a donut-shaped radial guide member disposed above the base with a moving member disposed in the center;
It consists of a plurality of expansion pieces divided and arranged in the circumferential direction, and each expansion piece comes into contact with the inner peripheral surface that contacts the outer surface of the vertically movable member and the inner peripheral surface of the annular leather. Each of the expansion pieces or the radial guide member is provided with a guide mechanism for guiding movement of each of the expansion pieces in the radial direction.

<Example> An embodiment of the present invention will be described below based on the drawings.

The leather wrapping method of this embodiment includes a step of creating an annular leather, a subsequent step of enlarging the diameter of the leather, and a subsequent step of covering the leather.

In the annular leather creation process, the steering wheel 10 is
A strip of natural leather or artificial leather 20 as shown in FIG. 4, which has been formed by cutting according to the shape of This is a process of creating an annular leather 30. In this step, the annular leather 30 is created so that the diameter of the annular leather 30 is at least slightly smaller than the outer diameter of the ring portion 11 of the steering wheel 10.

In addition, in FIG. 4, the protrusion 22 in the belt-shaped leather 20
is a part that will cover a part of the spoke part 12 of the steering wheel 10 when the leather wrapping work is completed.

The leather diameter expanding step is a step in which the annular leather 30 created in the annular leather creating step is set in the leather diameter expanding device 100 and the diameter of the annular leather 30 is expanded.

As shown in FIG. 1.2.3, the leather diameter expanding device 100 includes a base 110, a truncated cone-shaped vertically movable member 120, a donut-shaped radial guide member 130, and a plurality of expansion pieces 1.
31 and a guide mechanism 140.

The truncated conical vertically movable member 120 is disposed to protrude upward from the base 110 so as to be movable in the vertical direction by an air cylinder 150 disposed at the center of the base 110.

The donut disk-shaped radial guide member 130 is disposed in parallel with a support plate 160 fixed to the upper part of the base 110 with the vertically movable member 120 arranged in the center, and above the support plate 160. It consists of a mounting plate 170 connected to this support plate 160. *The radial direction guide member 130 is provided with a plurality of expansion pieces 131 equally divided in the circumferential direction sandwiched between the support plate 160 and the mounting plate 170, and each expansion piece 131 is arranged in the upper and lower directions. Inner peripheral surface 1 in contact with outer surface 121 of moving member 120
31a, an outer circumferential surface 131b that contacts the inner circumferential surface 31 of the annular leather 30, and a side surface 13 formed with a vertical surface along the radial direction.
1c. Note that the side surface 131c is not limited to a vertical surface, and may be an inclined surface.

The guide mechanism 140 is for guiding each expansion piece 131 so that each expansion piece 131 can move in the radial direction, and includes a guide groove 141 bored in each expansion piece 131 along the radial direction, A guide member 142 fixedly disposed on the radial guide member 130 and inserted into the guide groove 141
It consists of

The annular leather 30 is made using the leather diameter expanding device 100 having the above configuration.
When expanding the diameter, the vertically movable member 120 is positioned at the lower end position, and each expansion piece 131 is positioned on the inner circumferential side so as to have the minimum diameter. In this state, the annular leather 30 is applied to the outer peripheral surface 132 of each expansion piece 131, and the air cylinder 150 is operated to move the vertically movable member 120 upward.

Due to this upward movement of the vertically movable member 120, each expansion piece 131 receives a pressing force directed outward in the radial direction, and the outer peripheral surface 12 of the vertically movable member 120 is
Each expansion piece 1 is guided by the guide mechanism 140 and moved radially outward while maintaining a state of contact with
The diameter at 31 increases. As the diameter expands, the annular leather 30 is pulled and uniformly expands in diameter.

The leather coating process that follows such a leather diameter expansion process is as follows:
The operation of the air cylinder 150 is stopped and the vertically moving member 120
The upward driving force for the vertically moving member 120 is released, and the vertically moving member 120
can return to the lower end position. And each expansion piece 1
31 is manually moved in the direction in which its diameter decreases, in other words, towards the center position. Each of these expansion pieces 13
1 to the center position, the close contact between the diameter-expanded annular leather 30 and the outer circumferential surface 132 of each expansion piece 131 is released, and the tension state of the annular skin jE30 is released, and the annular leather 30 is It can be easily removed from each expansion piece 131. The ring portion 1 of the steering wheel 10 is placed on the mounting plate 170 in advance.
1, the annular leather 3 removed from each expansion piece 131 described above.
Pull up 0 and cover it while positioning it. Thereafter, the side edges 32 of the annular leather 30 are sewn or glued.

In this way, the leather wrapping work for the steering wheel 10 is completed.

As another embodiment, although not shown, the leather diameter expanding device 1
In 00, a compression spring or a tension spring is inserted between the inner peripheral surface 141a of the guide groove 141 and the outer peripheral surface 142b of the guide member 142 along the radial direction, and the air cylinder after the leather diameter is expanded as described above. There is one in which each expansion piece 131 is automatically reduced in diameter by the force of a spring when the operation of the expansion piece 150 is stopped. According to this embodiment, the automatic return of each expansion piece 131 can reduce the workload.

In yet another embodiment, the guide mechanism of the leather diameter expanding device [100] is formed by forming a guide groove 141 on the support plate 160 or the mounting plate 170 side, contrary to the guide mechanism 140 of the above embodiment, and attaching the expansion piece to the guide mechanism of the leather diameter expanding device [100]. Guide member 142 on the 131 side
The guide member 142 is fixed or protrudes from the guide member 142. This guide mechanism also allows each expansion piece 131 to be moved while being guided in the radial direction.

Although the guide groove 141 in the above embodiment is a through hole, it goes without saying that the same effect can be achieved even if the guide groove 141 is a bottomed groove.

<Operations and Effects of the Invention> As explained above, the leather-wrapping method for a leather-wrapped steering wheel according to the present invention is a leather-wrapping method for covering at least the outer periphery of the ring portion of the steering wheel with leather. A step of creating a ring-shaped leather by joining both ends to create a ring-shaped leather; a step of expanding the diameter of the ring-shaped leather using a leather diameter-expanding device; and a step of steering the expanded leather. It is characterized by comprising a leather coating step of coating at least the outer periphery of the ring portion of the wheel. In the leather diameter expansion process, the diameter of the annular leather is expanded using a leather diameter expansion device, so
Immediately after expanding the diameter and for about 30 minutes, the diameter of the annular leather is larger than the diameter of the ring part, so the leather can be easily attached to the ring part, making the leather wrapping work less complicated and making the work easier. It is possible to improve sexual performance.

Further, the leather diameter expanding device according to the present invention includes a base, a truncated conical vertically movable member disposed at the center of the base so as to be movable in the vertical direction, and this vertically movable member disposed at the center. It consists of a donut-shaped radial guide member disposed above the base, and a plurality of expansion pieces divided and arranged in the circumferential direction on this radial guide member. The piece has an inner circumferential surface that contacts the outer surface of the vertically movable member and an outer circumferential surface that contacts the inner circumferential surface of the annular leather. It is characterized by being provided with a guide mechanism that guides the movement of the expansion piece in the radial direction. Therefore, it becomes possible to uniformly expand the diameter of the annular leather with a relatively simple configuration.

[Brief explanation of drawings]

Fig. 1.2.3 is a diagram showing a leather diameter expanding device according to an embodiment of the present invention, and Fig. 1 is an immediate sectional view of the main part of the leather diameter expanding device immediately before starting the leather diameter expanding process; 3i! Figure 2 is a state diagram immediately after the end of the leather diameter expansion process taken along the same cross-sectional line, Figure 3 is a perspective view of the main parts of the radially movable member of the leather diameter expansion device, 'tS4 is a plan view of the belt-shaped leather, 'fS5 is FIG. 2 is a perspective view of a toroidal leather created by a toroidal leather creation process. DESCRIPTION OF SYMBOLS 10... Steering wheel, 11... Ring part, 20... Belt-shaped leather, 30... Annular leather, 100... Leather diameter expansion device, 110... Base, 120... Upper and lower sides Moving member, 130... Radial direction guide member, 131... Expansion piece, 140... Guide mechanism, 160... Support plate, 170... Placement plate. Figure 3. Gourd Figure 3.

Claims (2)

[Claims] (1) A leather wrapping method for covering at least the outer periphery of a ring portion of a steering wheel with leather, which includes a step of creating a ring-shaped leather by joining both ends of a belt-shaped leather; A leather wrapping comprising: a leather diameter expanding step of expanding the diameter of the leather using a leather diameter expanding device; and a leather covering step of covering the outer periphery of at least a ring portion of a steering wheel with the expanded leather. How to wrap a steering wheel in leather. (2) a base; a truncated cone-shaped vertically movable member disposed at the center of the base so as to be movable in the vertical direction; and a vertically movable member disposed at the center above the base. It consists of a donut disk-shaped radial guide member and a plurality of expansion pieces that are divided and placed in the circumferential direction of the radial guide member. It has an inner circumferential surface in contact with the outer surface and an outer circumferential surface in contact with the inner circumferential surface of the annular leather, and each of the expansion pieces or the radial direction guide member is configured to allow each of the expansion pieces to move in the radial direction. A leather diameter expanding device comprising: a guide mechanism for guiding the leather.