JP2566929Y2 - grip - 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 for gripping and working a portable work machine such as a brush cutter.

[0002]

2. Description of the Related Art Conventionally, a grip of this type is formed by heating a synthetic resin with a metal mold, but requires a core to form an internal hollow portion. Therefore, in order to simplify the processing by eliminating the core and to reduce the manufacturing cost by eliminating the core, as shown in FIG. 5, between the two synthetic resin plates heated and softened, as shown in FIG. A blow molding method has been used in which air is press-fitted and pressed from the inside into a mold for holding the synthetic resin plate and molded. That is, in FIG. 5, two synthetic resin plates 5 and 7 previously heated and softened by the upper mold 1 and the lower mold 3 are overlapped and crimped as shown by chain lines A and B, and provided at one end. When air is injected from the air pipe 13 penetrating the recesses 9 and 11, the synthetic resin plates 5 and 7
Is a mold surface 1 formed on the inner surface of the upper mold 1 and the lower mold 3
The temperature is lowered by press-bonding to the molds 5 and 17, and the hardness is restored, and the upper mold 1 and the lower mold 3 are opened to take out the molded product.

According to this blow molding, since it is formed in a bag shape that does not leak air, its shape is limited. When it is used for a grip, a metal for fixing the grip to the support tube as shown in FIG. 4 is used. Fixtures were separately provided.

That is, in FIG. 4, the grip 18 is configured as follows. At both ends of a cylindrical grip portion 19 made of synthetic resin, a support tube portion 23 that fits into a support tube 21 that penetrates the center is formed, and a metal fixture 25 that engages with the outer periphery of the support tube portion 23 is provided. Support tube 2 by means of screw 27
It is fixed to 1. A throttle wire 22 penetrates below the grip 18.

[0005]

Conventionally, it has not been possible to manufacture a grip having a shape integrally formed with a fixture by blow molding at a low manufacturing cost.

[0006]

According to the present invention, a support cylinder is provided at both ends of a cylindrical grip portion so as to be fitted into a support tube, and the support cylinder is radially protruded from a portion cut off in the axial direction. And one end of each of two plate-shaped clamp pieces protruding in the radial direction facing each other is integrally fixed to both side edges of a cutout groove formed by cutting out the bellows portion. Then, the other ends of the clamp pieces are folded back toward the center, respectively, so as to face each other with an appropriate gap.

[0007]

According to the present invention, by molding by blow molding, cutting off both ends of the support cylinder and the inner end of the fixing part, and forming a hole through which a screw is formed in the fixing part, the fixing part can be integrated. And can be manufactured by blow molding.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

1 and 2, the grip 28 is formed as follows. That is, at both ends of the cylindrical grip portion 29 made of synthetic resin, a support tube portion 33 that fits into the support tube 31 that passes through the center is formed, and the support tube portion 33 is cut out in the axial direction by a notch groove 35 ( One end of each of two plate-shaped clamp pieces (fixing parts) 37, 37 facing each other and protruding in the radial direction is integrally formed on both side edges of the clamp pieces 37, 37, respectively. Are bent back toward the center so as to face each other with an appropriate gap 39, and are fastened by screws 41 passing through the clamp pieces 37, 37. A throttle wire 42 is provided below the grip 28.

The grip 28 is formed by blow molding as shown in FIG. That is, the two synthetic resin plates 47 and 49, which have been heated and softened in advance, are overlapped and pressed by the upper mold 43 and the lower mold 45 as shown by chain lines A and B, and the concave portions 51 and 53 provided at one end. Air tube 55 through
When the air is further injected, the synthetic resin plates 47 and 49 are brought into contact with the mold surfaces 57 and 57 formed on the inner surfaces of the upper mold 43 and the lower mold 45.
59, the hardness is restored as the temperature is lowered. The upper mold 43 is provided in advance with a concave portion for forming a bellows portion (see FIGS. 2A and 2C) indicated by reference numerals 37 and 37 protruding in the radial direction in a portion corresponding to an upper portion of the support cylinder portion 33. ing. Therefore, the bellows portion in the radial direction functions as the clamp pieces 37, 37. Thus, the bellows portion is formed at a portion where the support cylinder portion 33 is notched in the axial direction, and thereby, a notch groove 35 which is formed by cutting the support cylinder portion 33 in the axial direction is formed. Will be done. The upper mold 43 and the lower mold 45 are opened to take out the molded product, and the end face of the support cylindrical portion 33 and the connecting portion C at the inner ends of the clamp pieces 37, 37 which are bellows are cut off. Is to process the through hole. In addition, as shown in FIG.
The portion C at the inner end of each of the pipes 7 and 37 may be located outside the outer diameter of the support tube 31 and provided without being cut off after molding.

[0011]

According to the present invention, the fixture (clamping piece) for fixing the grip to the support tube is integrally formed, and the shape is such that it can be manufactured by the blow molding method. It is inexpensive and easy to manufacture.

[Brief description of the drawings]

FIG. 1 is a side view of a grip according to an embodiment of the present invention, and FIG.

FIG. 2 is an explanatory view of the blow molding, in which (a) is a side sectional view,
(B) is a front view, (c) is a front sectional view.

FIG. 3 is a front view of the other embodiment.

FIG. 4 shows a conventional example, in which (a) is a side sectional view,
(B) is a front view.

FIG. 5 is an explanatory view of blow molding of a conventional example, in which (a) is a side sectional view, (b) is a front view, and (c) is a front sectional view.

[Explanation of symbols]

 29 grip part 31 support tube 33 support cylinder part 35 notch groove 37 clamp piece 39 gap 41 screw

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 52-47134 (JP, U) JP-A 3-12726 (JP, U) JP-A 63-6122 (JP, U) JP-A 62- 62308 (JP, U) Japanese Utility Model Showa 64-14984 (JP, U) Japanese Utility Model Utility Model Showa 60-30909 (JP, Y2)

Claims (1)

(57) [Scope of request for utility model registration] 1. A support cylinder part 3 fitted to a support tube 31 penetrating the center at both ends of a cylindrical grip part 29 made of synthetic resin.
A grip provided integrally with a radially protruding bellows portion at a portion where the support cylinder portion 33 is notched in the axial direction, wherein both side edges of the cutout groove 35 cut out by the bellows portion are provided. One end of each of two plate-shaped clamp pieces 37, 37 protruding in the radial direction facing each other is formed in a shape integrally fixed to each other, and the other ends of the clamp pieces 37, 37 face the center direction, respectively. And turn it back to the appropriate gap 39
The clamp pieces 37,
A grip provided with a fastening screw 41 for penetrating through the 37 and fastening the clamp pieces 37 and 37 together to fix the grip portion 29 to the support tube 31.