JPH0125196Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to the structure of a winding drum of a rotary hoisting device used for aluminum sash screen doors, particularly roll-up type screens.

(Prior art) A so-called roll-in type screen door is installed on a blank or upper frame of aluminum sash, etc., houses a rotating winding drum in the space, and inserts an insect repellent screen made of vinylidene chloride, polypropylene, etc. into the winding drum. When the net is lowered in contact with a window, it is rolled up to a length that covers the opening of the window in place of a satsushi glass shoji, etc., and when used, the net is placed on the handle or bottom frame provided at the bottom end of the net. and pull it out downward against the winding force of the coil spring installed inside the hoisting drum.
Many have a structure in which the net is set by stopping at the lower frame of the window. In this case, the winding drum is usually an elongated cylindrical shape corresponding to the width of a window, as described in Utility Model Publication No. 57-153196, and a wide belt-like polyvinylidene chloride thread or the like is attached to the winding drum. The method for installing the net is to arrange small grooves along the entire length of the cylindrical winding drum along one generatrix, and insert the end of the net into this long groove to its full width. At that time, the net was often fixed to the winding drum by inserting a small string of vinyl chloride material into the end of the net and inserting it together with the net into the long groove. At the same time, according to this attachment method, due to the material of the net having a wide width and high flexibility and elasticity, the edge of the net is slightly wrapped around a thin string made of vinyl chloride material. Pressing the net into the long groove of the shell is a fairly tedious task, and if you simply place the end of the net at the top of the long groove without wrapping the net around the string, and then press the thin string over it, it will take a long time. When the net is raised and lowered, the end of the net may come out of the long groove of the winding drum, causing damage and shortening the life of the product. However, when installing, if force is applied to ensure that the net and thin string are inserted into the long grooves, the winding drum is a cylindrical body with a nearly circular cross section, so it will not fit on the workbench or the base plate of the processing machine. The winding drum was prone to tip over or trip, and this phenomenon significantly hindered work efficiency and became the biggest bottleneck in processing and assembling screen doors.

(Purpose of the invention) The present invention solves the above-mentioned problems, prevents troubles such as the winding drum inadvertently slipping or falling while the net is being attached to the winding drum, and also eliminates the need to rely on the net presser. Insertion into the long groove of the winding drum. filling. To provide a winding drum of a rotary winding device for a screen door that can be securely mounted.

(Structure of the invention) The structure of the invention will be explained below with reference to the drawings.
In Fig. 1, A is a retractable screen door equipped with a winding drum of the screen door hoisting device of the present invention, and B is a metal sash such as an aluminum sash or a synthetic resin sash installed in an opening of a building. C is the opening where the screen door is installed. Reference numeral 1 denotes a storage box for a rotary hoisting device, which is made up of a case wider than the width of the screen, which is provided with drawer slits 13 for the screen door at the lower end near the opening C, and is provided with drawer slits 13 for the screen door across its entire width. Both ends thereof incorporate a shaft bearing for rotatably holding the winding drum of the hoisting device, which will be described later, and a lift control device for a net such as a stopper. 2 is a rotary hoisting device for raising and lowering the screen door stored in the storage box 1; 3 is a winding drum of the present invention rotatably stored and held in the storage box 1; It consists of a generally cylindrical hollow body with a width that can be rolled up. 4 is a screen door screen made of vinylidene chloride. This is a net made by weaving synthetic resin threads of polypropylene or polyester-based polymer compounds, and this net is pulled down through the drawer slit 13 of the net of the storage box 1 to be placed in an opening such as a window. By covering the entire surface of the opening C, insects are prevented from entering from outside. Reference numeral 14 denotes the lower stile of the screen door A. The nets 4 are arranged across the entire width of the lower end of the screen door A, and string-like mesh pressers made of vinyl chloride are inserted into the long grooves of the screen mounting portion 8 provided at the upper edge of the lower stile of the screen door. Secure the lower end of the net to the lower stile by pressing it along the lower edge. Reference numeral 6 denotes handles for raising and lowering the screen door screen, which are arranged along a part or the entire width of the lower stile 14 of the screen door, and the long groove of the screen attachment part 8 and the handle 6 are made of extruded aluminum alloy material, It is possible to mold it integrally with the lower stile of the screen door using an extruded synthetic resin material. 7 is a guide rail for lifting the net,
Attached to the vertical stile on both sides of the screen door. Reference numeral 9 denotes mohair or the like which is in contact with the screen 4 of the screen door, which is fitted in the lip-shaped long groove at the bottom end of the storage box 1 in the vicinity of the drawer slit 13 at the bottom corner of the storage box 1, and is in contact with the screen 4 over the entire width of the screen door. Dust-proof flocked body. In FIG. 2, reference numeral 10 denotes long grooves with a rectangular or purse-string cross section arranged alternately over the entire width of the winding drum 3. When the net 4 is fixed to the winding drum 3 by attaching a net presser to each side, the upper edge of the fixed net is pulled out due to the tensile force applied when the net is raised and lowered by using the screen door. A strip 11 may be provided to prevent the material from coming out and causing damage. Reference numeral 12 denotes narrow flat parts arranged along the entire length of a part of the outer periphery of the winding drum 3, which is an approximately cylindrical hollow body. The long grooves 10 and the protrusions 1 may be formed by processing, and the long grooves 10 and protrusions 1 may be formed as extruded molded materials of synthetic resin materials, extruded molded materials of metal materials such as aluminum alloys, or sheet metal processed materials of thin metal sheets.
Either may be formed integrally with 1. In addition, when arranging the narrow flat part 12, in order to quickly and smoothly insert and secure the upper edge of the net and the net holder, it is necessary to use manual force or a processing machine to effectively utilize the force. As a place to prevent the winding drum 3 from falling or tripping on the workbench on which the winding drum 3 is placed during manual work or on the base plate on which the winding drum 3 is placed during mechanical work, The outer periphery of the facing part of the long groove 10 of the winding drum 3 or the outer periphery of a position slightly different from there is suitable, and the position of the flat part 12 is set as appropriate depending on the relationship with the jig or fixture used. Let's take it as a matter of fact.

An essential component of the present invention for the winding drum of the rotary winding device used for the roll-up type screen door consisting of the above-mentioned parts is that it is made of a synthetic resin material having a width that allows the screen door to be wound around its width. The winding drum 3 is formed of a substantially cylindrical hollow body made of an extruded material of a metal material such as an aluminum alloy, or a sheet metal processed material of a thin metal sheet, and is recessed in its entire width. A long groove 10 with a rectangular or purse-string cross-section and a part of the outer periphery of the winding drum 3 at a part opposite to the long groove 10 or at a position slightly offset from the opposite part, and narrow width strips arranged alternately over the entire width of the winding drum 3. The present invention is characterized by a winding drum of a rotary winding device for a roll-up type screen door, which has a flat portion 12.

(Operations and Effects) Since the present invention has the above-mentioned configuration, the screen door net 4 can be inserted into the long groove 10 of the winding drum 3 using the string-like net presser 5. When installing the winding drum 3 by hand or using a processing machine during filling, if the flat part 12 of the present invention is used to place the winding drum 3 on the workbench or the base of the processing machine, the winding drum 3 will be extremely stable. It can be placed on a table, and the winding drum 3 will not fall or trip during manual work or mechanical processing, and the force applied to insert the net presser 5 can be transferred to the long groove. 10, or on a part of the outer periphery of the winding drum 3 at a position slightly offset from the facing part.
Since it can be received by the flat portions 12 arranged across the entire width of the holder, it is possible to efficiently apply the applied force to the mounting operation. And this flat part 12
Even when the winding drum 3 needs to be transported in various ways during manufacturing or processing, it is difficult to roll in the circumferential direction unlike when the cross section is circular, and the flat part does not roll over its entire width in the axial direction of the cylinder. Therefore, the flat portion 12 of the winding drum 3 is
As long as the device is placed on the device, the positions of other long grooves 10 etc. are automatically determined.
It also has the effect of reducing the time required for production by omitting the so-called posture adjustment process in the preparation process necessary for inserting the net 4 into the machine.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a part of the retractable screen door equipped with the present invention in cross section, Fig. 2 is a perspective view showing a part of the winding drum in cross section, and Fig. 3 is a side view showing a part of the winding drum in cross section. FIG. 2 is a partially sectional perspective view showing a state in which a net is attached to the body. Explanation of the symbols representing the main parts of the figure, A... Roll-up screen door, B... Fittings, C... Opening, 2... Rotary hoisting device, 3... Winding drum, 4... Net, 5... Net presser, 8... (attached part on the lower edge of the net, 10...
Long groove (of winding drum 3), 12...flat part (of winding drum 3),
13...Mesh drawer slit (of storage box 1), 14...Lower stile (of screen door A).

Claims (1)

[Scope of utility model registration request] A generally cylindrical hollow body made of an extruded synthetic resin material, an extruded molded material of a metal material such as aluminum alloy, or a sheet metal processed material of a thin metal sheet, and has a width that wraps around the screen of the screen. In the formed winding drum 3, long grooves 10 having a rectangular or purse-string cross section are mutually recessed along the entire width, and a part of the outer periphery of the winding drum 3 at a position opposite to or slightly offset from the opposite part of the long grooves 10. To,
Narrow flat portions 12 arranged across the entire width of the winding drum 3
A winding drum of a rotary winding device for a retractable screen door.