JPH0791902A - Tape measure - Google Patents

Abstract

PURPOSE:To provide a tape measure of synthetic resin reinforced with selfsupporting fiber at the tip of which a slidable hook with an L shape is strongly caulked with revets. CONSTITUTION:At a fixing part 32 of an L shape hook 3 is formed a hooking part 31 and the fixing part 32 are almost at a right angle to each other, long holes 33 is punched in the length direction and the fixing part 32 of the hook 3 is overlapped on the tip surface of the tape 2 made of a synthetic resin reinforced with selfsupporting fiber. A rivet 4 is inserted in the long hole 33 of the fixing part 32 and simultaneously the tip of the rivet 4 by putting a pull-out stopper 5 of plate shape in between, is caulked on the back surface of the tape measure, to which the hook 3 is fixed to the tip of the tape measure 2 slidably by the thickness of the hook part 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape measure in which an L-shaped hook is slidably attached to the tip end of a tape measure tape made of a self-supporting fiber-reinforced synthetic resin so that the inner diameter and the outer diameter can be measured. .

[0002]

2. Description of the Related Art Generally, various types of hooks are attached to the leading end of a tape measure in accordance with the intended use of the tape measure so that efficient measurement can be performed. Particularly, in a tape measure tape made of steel having a self-supporting property in which the cross section is curved in an arc shape, an L-shaped hooking tool in which a hooking portion and a mounting portion are formed substantially at right angles is hooked along a longitudinal direction. It is attached so that it slides by the thickness of the part, and the inner surface of the hooking part is hooked on the object to be measured, or the outer surface of the hooking part is brought into contact with the object to be measured,
It is designed to measure the inner and outer diameters. To attach the hooking portion, a rivet is inserted into a long hole formed in the attaching portion, and the tip of the rivet is caulked on the back surface of the tape measure tape.

[0003]

However, a tape tape made of a self-supporting fiber-reinforced synthetic resin is generally formed by impregnating and hardening a core material made of glass fiber or the like with a thermosetting resin,
Moreover, since the tape measure tape is made as thin as possible in order to give it the necessary flexibility, it is weaker in strength than the tape measure tape made of steel and is easily damaged. It was not possible to slidably attach an L-shaped hooking tool like the one described above, and even if it was crimped, the tape measure could be immediately damaged and the rivet could fall out if an impact was applied to the hooking tool. .

In view of the above, the present invention solves the above-mentioned problems and, at the tip of a tape tape made of a self-supporting fiber-reinforced synthetic resin,
A slidable L-shaped hook provides a tape measure that is firmly crimped with a rivet.

[0005]

In order to achieve the above object, the present invention has the following constitution. That is, in the tape measure according to the present invention, a long hole is bored in the longitudinal direction in the attaching portion of the L-shaped engaging member in which the engaging portion and the attaching portion are formed substantially at right angles, and the attaching portion of the engaging member is The tape is laid on the front surface of the tape measure tape made of self-supporting fiber reinforced synthetic resin, and the rivet is inserted into the long hole of the mounting part, and the tip of the rivet is caulked on the back surface of the tape measure with a plate-shaped retainer. Thus, the hooking tool is attached to the tip of the tape measure so as to be slidable by the thickness of the hooking portion.

[0006]

In the tape measure according to the present invention, since the tip of the rivet inserted into the long hole of the attachment portion of the L-shaped hooking device is caulked on the back surface of the tape measure with the plate-like retaining device interposed. The vicinity of crimping of the tape measure is protected by the retaining device. Therefore, not only can the rivet be firmly crimped, but the tape measure is not damaged or the rivet does not fall out even when an impact is applied to the attached hook.

[0007]

Embodiments of the present invention will be specifically described below with reference to the drawings. The present invention is not limited to these examples.

FIG. 1 is a perspective view showing an embodiment of a tape measure according to the present invention, FIG. 2 is a sectional view of the tip end of the tape measure of FIG. 1, FIG. 3 is a bottom view of FIG. 2, and FIG. FIG. 5 is a plan view showing a retainer used, and FIG. 5 is a plan view showing another embodiment of the retainer.

In the drawings, reference numeral 1 denotes a case made of synthetic resin, metal or the like, which is usually formed of an upper lid 11 and a lower lid 12, and a reel (not shown) is rotatable in the case 1. And a tape measure tape 2 made of self-supporting fiber reinforced synthetic resin is wound around the outer circumference of the reel, and an L-shaped hook 3 is attached to the tip end of the tape measure 2, and the tip end is The tape is drawn out from the tape outlet 13 of the case 1. The tape measure tape 2 may be automatically wound on the reel by a winding spring (not shown) loaded on the reel, or a winding handle (not shown) provided outside the case 1. It may be wound around the reel by rotating (No.).

The tape measure tape 2 is made of a fiber-reinforced synthetic resin, and is an elongated tape-shaped body obtained by impregnating inorganic or synthetic fibers with a thermosetting synthetic resin. As the inorganic fibers, glass fibers, carbon fibers, etc. are used, and as the synthetic fibers, fibers such as polyamide, polyester, aromatic polyamide, vinylon are used, but they have electrical insulation and high strength. Glass fiber is preferably used for the reason. As the thermosetting synthetic resin, resins such as polyester, epoxy and acrylic are used.
Particularly, thermosetting polyester is preferably used. The reason why the thermosetting polyester is preferably used is that the resin has rigidity and elastic restoring force, has good adhesiveness with inorganic fibers and synthetic fibers before curing, and improves self-standing property. This is because it is extremely suitable. The outer periphery of the thermosetting synthetic resin may be appropriately covered with a thermoplastic synthetic resin such as urethane having flexibility.

The tape measure tape 2 has a cross-section curved in an arc shape to provide self-supporting property. The tape measure 2
Is generally 0.1 to 0.5 mm and has a width of 10
The length is about 30 mm, the length is about 1 to 10 m, and the arc length of the cross section is about 1/3 of the circumferential length drawn by the radius of curvature of the cross section during arc molding. Then, a mounting hole 21 is provided at the tip of the tape measure 2 so that the hook 3 can be mounted.
Individually provided, the front surface and the back surface are appropriately provided with graduations 22 along the longitudinal direction.

The hook 3 has an L shape in which the hook 31 and the mounting portion 32 are formed substantially at right angles, and the mounting portion 32 is provided with two elongated holes 33 in the longitudinal direction. The hook 3
May be a metal such as stainless steel, but is preferably made of a synthetic resin such as polycarbonate, polyvinyl chloride, polypropylene, polypropylene or the like because it has electrical insulation properties, and particularly in the case of polycarbonate, It is preferable because it is excellent in strength.

The mounting portion 32 of the hooking device 3 is superposed on the surface of the tip portion of the tape measure 2, the rivet 4 is inserted into the long hole 33 of the mounting portion 32, and the tip end of the foot portion 41 of the rivet 4 is a tape measure. It is crimped on the back of tape 2. The gap between the head 42 of the rivet 4 and the surface of the tape measure 2 is slightly larger than the thickness of the mounting portion 32, and the long hole 33 is formed.
The diameter in the longitudinal direction, that is, the major axis is larger than the diameter of the large diameter portion 43 of the rivet 4 by the thickness of the hooking portion 31. In this way, the hook 3 slides in the longitudinal direction of the tape measure 2 by the thickness of the hook 31, and during measurement, the inner surface of the hook 31 was hooked on the object to be measured. In this case, that is, when the outer diameter is measured and when the outer surface of the hook 31 is brought into contact with the object to be measured, that is, when the inner diameter is measured, there is no error.

The rivet 4 has a plate-like retaining member 5 interposed between the rivet 4 and the back surface of the tape measure 2 and the tip thereof is crimped. That is, as shown in FIGS. 2 to 3, a plate-like retainer 5 curved in the same shape as the cross section of the tape measure 2 is brought into contact with the back surface of the tape measure 2 and the mounting portion 32.
The foot portion 41 of the rivet 4 inserted into the elongated hole 33 is inserted into the attachment hole 21 of the tape measure 2 and the through hole 51 formed in the retainer 5, and the tip thereof is caulked.

The retainer 5 is made of metal such as stainless steel, polycarbonate, polyvinyl chloride, polypropylene,
It is a plate-shaped member made of an appropriate material such as a synthetic resin such as polypropylene, and its shape is not particularly limited, and the external dimensions may be within the width of the tape measure 2. The retainer 5 illustrated in FIG. 4 has a disc shape with a diameter of 5 to 6 mm, and the retainer 5 in FIG. 5 has two retainers 5 connected in series. It is preferable that a plurality of retaining devices 5 are connected in series as shown in FIG. 5 because the work of attaching the retaining devices 5 is simplified.

In order to confirm the performance of the tape measure according to the present invention, the following test was conducted. That is, the tape measure of the present invention as shown in FIG. 1 in which the L-shaped hook 3 is attached by caulking the rivet 4 with the plate-like retainer 5 on the backside of the tape tape 2 made of self-supporting fiber reinforced synthetic resin, and the retainer. Without intervening 5,
A tape measure as a comparative example in which the rivet 4 is directly caulked to the back surface of the tape measure 2 is attached, and a tape measure 2 of each tape measure is drawn out from the case by about 50 cm, and then a tape spring is used. By automatically accommodating, the hook 3 was collided and locked to the tape outlet 13, and the durability of the rivet 4 near the caulking was investigated. as a result,
In the comparative example, when the above operation was repeated 20 to 30 times, the vicinity of the caulking of the tape measure 2 was damaged and the rivet 4 fell out. However, even if the tape measure of the present invention was repeated 5000 times or more, the tape measure 2 was damaged or the rivet 4 was removed. It was confirmed that the tape measure of the present invention was excellent, with no slipping off.

[0017]

As described in detail above, in the tape measure according to the present invention, the L-shaped hooking device is slidably attached to the leading end of the tape measure by the thickness of the hooking part, so that The inside diameter and the outside diameter can be measured without error by hooking the inner surface of the hooking portion of the tool with the object to be measured or by contacting the outer surface of the hooking portion with the object to be measured.

Further, since the tip of the rivet inserted into the elongated hole of the mounting portion of the L-shaped hooking device is caulked on the back surface of the tape measure with the plate-like retaining device interposed, the strength is relatively weak. Despite the fact that the tape measure made of fiber reinforced synthetic resin is used, the area around the caulking of the tape measure is protected by the retaining device, so that not only can the rivet be firmly caulked, but also the attached hook. Even if the tool is shocked, the tape measure will not be damaged or the rivet will not fall out.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a tape measure according to the present invention.

FIG. 2 is a cross-sectional view of a tip portion of the tape measure tape of FIG.

FIG. 3 is a bottom view of FIG.

FIG. 4 is a plan view showing the retainer used in FIG.

FIG. 5 is a plan view showing another embodiment of the retainer used in the present invention.

[Explanation of symbols]

 2 Tape measure tape 3 Locking tool 31 Locking section 32 Mounting section 33 Long hole 4 Rivet 5 Retaining tool

Claims (1)

[Claims] 1. A long hole is bored in a longitudinal direction in an attachment portion of an L-shaped engagement member in which the engagement portion and the attachment portion are formed substantially at right angles, and the attachment portion of the engagement member is a self-supporting fiber. Laminated on the surface of the tip of the tape measure tape made of reinforced synthetic resin, the rivet is inserted into the elongated hole of the mounting portion, and the tip of the rivet is caulked on the back surface of the tape measure with a plate-like retainer interposed. A tape measure in which a hooking tool is slidably attached by the thickness of the hooking section to the tip of the tape measure.