JP2001140847A - Connected type washer for sheet execution of waterproofing work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connected type washer for sheet execution of waterproofing work which is excellent in handling property and stability in feeding. SOLUTION: A plurality of dish parts 3 is molded to be arranged in on line on a high density polyethylene sheet by means of a press die, and portion other than the dish parts 3, flange parts 4 around the dish part 3, and connection tab parts 5 which connect the dish parts are removed by blanking thereby forming connected type washer 1 of a single belt shape. Since each of the connection tab parts 5 has an appropriate hardness, handling property is excellent compared with a connected type washer in which single washers are connected to each other by a tape, and a fluctuation of an array pitch of the washer due to the stretched tape does not occur, thereby reducing probability of a feeding failure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin washer used for laying a waterproof sheet on a roof base of a house or the like, and more particularly to a connection type washer used for a nailing machine.

[0002]

2. Description of the Related Art When a waterproof sheet made of paper impregnated with tar is laid on a base of a roof of a house or the like to be nailed, the waterproof sheet is prevented from being broken and is securely held, and water leakage is prevented. Therefore, it is specified to interpose a washer between the nail and the tarpaulin.

A washer for installing a waterproof sheet is a dish-shaped washer manufactured by resin injection molding and having a diameter of several centimeters, and has a hole for inserting a nail at the center. A washer is placed on the laid waterproof sheet regardless of the presence or absence, and a nail is driven into the center of the washer with a hand-held hammer or a nailing machine.

[0004] Further, in order to easily perform a nailing operation using a washer, a nailing machine for waterproof sheet construction provided with a nail feeding mechanism and a washer feeding mechanism is also known. This type of nailing machine is provided with a magazine for connecting nails and a magazine for accommodating washers connected by tape, and the nail and the washer are continuously moved to the nose portion by a feed mechanism in conjunction with the nailing. Supplied,
Pulling the trigger lever causes the nail to penetrate the washer and drive into the roof ground.

[0005]

The conventional connection type washer used for the nailing machine for constructing a waterproof sheet has a single piece of washer adhered to a long tape at a constant interval, and the tape is flexible. There is a drawback that the winding shape is easily broken and difficult to handle, and it is difficult to load the washer magazine and to pull out the end of the tape from the washer magazine and set it on the nose.

Further, the tape may extend and the arrangement pitch of the washers may fluctuate, which may hinder the feeding by the washer feeding mechanism, or the leading washer may not be accurately positioned immediately below the nose, and the nail may be washed. Of the washer may be damaged by being driven into a position deviated from the center.

[0007] Therefore, there arises a technical problem to be solved in order to improve the handleability and the feeding stability of the connection type washer, and an object of the present invention is to solve the above problem.

[0008]

SUMMARY OF THE INVENTION The present invention proposes to achieve the above object, and is a connecting washer for installing a waterproof sheet, which is formed into a resin sheet by drawing using a press die. A plurality of plates arranged in series are formed, and a portion other than the tabs connecting the plates and the plates is removed by punching to form an integral belt shape for forming a waterproof sheet. Is provided.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a connection type washer 1 for construction of a waterproof sheet, and a large number of washers 2 are connected in series.

The circular washer 2 is composed of a plate portion 3 and a flange portion 4 on the outer periphery thereof. The center of the top surface of the plate portion 3 is a flat portion 3a. Each washer 2 is connected by a short connecting tab portion 5, and when a nail is driven into the leading washer by a nailing machine, a notch 5a provided in the middle of the connecting tab portion 5 is torn, and the leading washer is broken. Is separated from the next washer.

The connection type washer 1 is manufactured by pressing and punching a long belt-shaped resin sheet. As the material of the resin sheet, it is necessary to have both a certain degree of flexibility and ease of drawing, and specifically, a high-density polyethylene, or polypropylene, or a mixed material of polyethylene and polypropylene, or polypropylene. And ethylene propylene rubber.

FIG. 2 shows a manufacturing process of the connecting washer 1.
6 (d) is an upper die of a drawing die, 7 is a lower die, 8 is a punching die, and 9 is a chisel for forming a notch.
(A) is a bottom view of the upper die, (b) is a bottom view of the punching die, and (c) is a plan view of the connection type washer.

In FIG. 2, a high-density polyethylene sheet 1
0 is sent from left to right, and the upper die 6 and lower die 7 of the drawing die
Pressed by.

FIG. 3 shows details of the drawing mold, and the upper mold 6
The distance between the upper mold 6 and the lower mold 7 is smaller than the thickness of the high-density polyethylene sheet 10, and a relief 6 a is provided below the shoulder of the upper mold 6. The high-density polyethylene sheet 10 is rolled at the portion, and the dish 3 swelling upward on the high-density polyethylene sheet 10 is formed by drawing. As shown in FIG. 1, the plate portion 3 is gently inclined from the central flat portion 3a toward the outer edge portion and continues to the shoulder portion 3b, and the boundary between the plate portion 3 and the surrounding flange portion 4 is a curved surface. It has become.

Next, the high-density polyethylene sheet 10 on which the plate portion 3 is formed is punched by a punching die 8. The punching die 8 is punched while leaving the flange portion 4 and the connection tab portion 5 around the plate portion 3.
A notch 5a is formed at the center.

The outer diameter of the washer 2 including the flange 4 in the illustrated example is 26 mm, and the diameter of the dish 3 is 22 m.
m, the diameter of the central flat portion 3a is 10 mm,
Needless to say, these values can be arbitrarily designed.

The present invention is not limited to the above-described embodiment, and various modifications are possible within the technical scope of the present invention, and it goes without saying that the present invention extends to those modifications. is there.

[0018]

As described above, the connecting washer for the construction of the waterproof sheet according to the present invention is formed as an integral belt by punching a single resin sheet, and the tab for connecting the washer is provided. Since the part has moderate hardness, loading to the washer magazine and pulling out the tip of the washer from the washer magazine and setting it to the nose compared to the conventional washer connected by flexible tape Can be easily performed, and the handleability is good.

Further, since the tape connecting the washers does not extend and the arrangement pitch of the washers does not fluctuate as in the case of the conventional connection type washer, the stability of the washer feed is improved, and poor feed and nailing position are prevented. The risk of displacement is reduced.

In addition, since a single long connecting washer is manufactured by drawing and punching, a conventional single washer is individually formed by injection molding and attached at regular intervals on a tape. Various effects are exhibited, such as lower production cost compared to the connection type washer.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, in which (a) is a front view of a connecting washer, (b) is a cross-sectional view taken along line AA of (a),
(C) is an enlarged sectional view of a shoulder portion of the washer.

2A and 2B show a manufacturing process of a connection type washer, wherein FIG. 2A is a bottom view of an upper mold of a drawing mold, FIG. 2B is a bottom view of a punching mold,
(C) is a bottom view of the chisel, (d) is a plan view of the resin sheet, and (e) is a manufacturing process explanatory view.

FIG. 3 is an enlarged sectional view of a drawing mold.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connection type washer 2 Washer 3 Plate part 3a Flat part 3b Shoulder part 4 Flange part 5 Connection tab part 5a Notch 6 Upper die of draw molding die 7 Lower die of draw molding die 8 Die die 9 Chisel 10 High density polyethylene Sheet

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Makoto Kosuge 6-6, Nihonbashi-Hakozakicho, Chuo-ku, Tokyo Inside Max Co., Ltd. (72) Tomonori Ichiba 6-6, Nihonbashi-Hakozakicho, Chuo-ku, Tokyo Max Inside (72) Inventor Hideaki Negishi 6-6, Nihonbashi-Hakozakicho, Chuo-ku, Tokyo Inside Max Corporation (72) Inventor Isao Tamano 6-6, Nihonbashi-Hakozakicho, Chuo-ku, Tokyo Max Inside F Terms (reference) 3J034 AA04 BD01 BD05 CA01

Claims (3)

[Claims] 1. A connecting washer for constructing a waterproof sheet, wherein a plurality of plates arranged in series on a resin sheet are formed by drawing using a press die, and the plates and each plate are formed by punching. A connection type washer for construction of a waterproof sheet, wherein a portion other than a tab portion connecting the portions is removed to form an integral belt shape. 2. The connection type washer according to claim 1, wherein a notch is formed in a tab portion connecting the washer, thereby facilitating breakage of the tab portion. 3. The connection according to claim 1, wherein the resin sheet material is a high-density polyethylene, polypropylene, a mixed material of polyethylene and polypropylene, or a mixed material of polypropylene and ethylene propylene rubber. Shape washer.