JPH0327450Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a rice planter, and more specifically to a rice planter with an improved collar.

(Prior Art) The opening of the shoe is formed into a pleat shape, and the elastic deformation of each pleat allows for stretchability, meeting the requirements for both fit on the thigh and ease of attachment and detachment.

(Problem that the invention aims to solve) However, since fitting properties and detachability are contradictory requirements, although the issue of attaching and detaching the cuffs with a structure without pleats at the rice planting length has been improved, There is a problem that the fit is getting worse.

This decrease in fit is related to the ease with which the adhesive will come off, and is particularly important under conditions of use where the degree of adhesion is high.

Regarding this point, it is conceivable to provide an elastic annular body made of rubber on the outer peripheral surface of the shoe opening. (Refer to Japanese Utility Model Publication No. 7-8972) However, since the rubber annular body is exposed to the outside, there is a problem that it is easily damaged and easily torn.

In particular, since the annular body is stretched while being worn, there is a risk that it may be cut due to the slightest scratch.

Therefore, in order to protect the rubber annular body, it has been considered to bury the annular body in the shoe opening (for example, see Japanese Utility Model Publication No. 39-37596), but this results in a structure where the folded shape of the shoe opening is lost. As a result, there is a problem in that it is not possible to expect a good fit between the folds and the sleeve.

In addition, as another means of protecting the rubber annular body,
It is conceivable to provide the annular body over the inner surface ridges of the undulating folds of the shoe opening. With this configuration, although the folds remain, the contact with the calf is made not by the folds but by the annular body, so in the end, the pleats cannot provide a good fit with the calf.

The present invention was developed in view of the above circumstances, and it is an elastic cuff structure that protects the elastic annular body, satisfies the conflicting requirements of fitability and detachability, and is easy to mold. The aim is to provide the rice planter.

(Means for solving the problem) In the rice planting head of the present invention, elastic annular bodies are placed on the inner circumferential surface of the cuff-shaped cuff with a widened flexible upper edge at approximately equal intervals from the same surface. Made of rubber or thermoplastic resin, which is supported by an integrally extending holding part, and has folds formed inwardly, leaving a space between the holding part and the holding part inside each holding body. That is.

(Function) The annular body is held by a holding portion on the inner circumferential surface of the shoe opening, and is protected and separated from the outside.

The opening of the shoe has a constricted shape and its upper edge is widened, making it easy to insert the foot.

When the pleated portion comes into contact with the foot, it elastically deforms so as to collapse the space between it and the holding portion, thereby fitting the foot.

(Example) An example of implementing the present invention will be described in detail below with reference to the drawings.

A in the figure is the rice planter, and the body of this rice planter A.
_A1 is made of a flexible elastic material such as natural or synthetic rubber, or thermoplastic resin such as vinyl chloride, and is molded into a desired shape.

Then, a stretchable annular body 3 is attached to the inner circumferential surface 2 of the shoe opening 1 which is flexible and has a widened upper edge.
It is held by holding portions 4 extending from the same body at approximately equal intervals.

Further, in the shoe opening 1, pleats 5 are formed inside each of the holding parts 4 in a curved shape inwardly leaving a space between the holding parts and the holding parts.

The annular body 3 is suitably made of a material having the required elasticity, such as a flat rubber, and is held freely between the holding part 4 and the inner circumferential surface part 2, and each part is held uniformly. It is stretchable, and its elastic force imparts elasticity to the shoe opening 1, and an outwardly convex fold portion 6 is formed between adjacent convexly convex pleat portions 5 on the inside.

As a result, in the worn state, the entire shoe opening 1 including the pleats 5 and 6 expands and expands, and the crease 5 is elastically deformed to fit the thigh side, resulting in a worn state in which it is tightly fitted over a wide range. Furthermore, the folded portion 5 intervenes so that the annular body 3 does not touch the thigh side, and prevents damage to the annular body 3 due to such contact, and allows the annular body 3 to freely expand and contract without receiving contact resistance with the thigh side. I have to. Each part of the annular body 3 independently expands and contracts uniformly, so that there is no breakage due to local fatigue, and the expansion and contraction force promotes good expansion and contraction movement of each fold part 5 and 6, so that each part of the shoe opening 1 is uniformly expanded and contracted. It will expand and contract.

Next, the method for manufacturing rice planting head according to the present invention will be explained.

A flat rubber-shaped annular body ₃ which has been vulcanized and molded in advance is elastically mounted on the shoe opening molding portion B _{1 of a mold B whose shoe opening molding portion B 1} has the structure shown in FIG. Dip mold B into the material paste,
After being pulled up and heated and molded, the rice planting length A is obtained by demolding.

A blending example of the material paste, heating temperature and heating time are shown below.

Formulation example Natural rubber latex (rubber content) 100% by weight Vulcanizing agent 1-1.5〃 Vulcanization accelerator 0.5~1〃 Vulcanization accelerator 0.5-1 〃 Anti-aging agent 0.5-1〃 Appropriate amount of pigment Vulcanization temperature: 180℃ Vulcanization time: 10 minutes (Effect of idea) Therefore, the present invention has the following advantages.

Since the annular body is protected on the inside, the annular body will not be damaged at all even if an obstacle comes into contact with the shoe opening while the shoe is being worn, and the shoe can be worn with peace of mind.

The inwardly curved folds on the inside of the holding part elastically deform and fit softly onto the arm, making it comfortable to wear and preventing the intrusion of rainwater and foreign matter.

The upper edge of the shoe opening is widened, making it easy to put your feet in and wear it.

The inwardly curved pleats protrude inward from the annular body and act as guides when inserting and removing the foot, allowing smooth insertion and removal without the foot getting caught in the annular body.

[Brief explanation of drawings]

FIG. 1 is a perspective view, partially cut away, showing an example of the implementation of the rice planter of the present invention. FIG. 2 is a cross-sectional plan view of the main part, and FIG. 3 is a perspective view showing the shoe opening forming part of the mold used for forming the rice planting length shown in FIG. In the figure, A is the length of the rice plant, 1 is the collar part, 2 is the inner peripheral surface part, 3 is the annular body, 4 is the holding part, and 5 is the fold part.

Claims (1)

[Scope of utility model registration request] An elastic annular body is held on the inner circumferential surface of the flexible shoe opening with an enlarged upper edge by retaining sections extending from the same surface at approximately equal intervals, and the inside of each retaining section is A rice planting head made of rubber or thermoplastic resin and having folded portions formed inwardly in a convex shape leaving a space between the holding portion and the holding portion.