JP2020051056A - Transverse screen device - Google Patents

Abstract

To facilitate assembly and maintenance of an internal unit including a slide rail for guiding a lower end of a screen relative to a screen frame in a transverse screen device having the slide rail for guiding the lower end of the screen opened and closed by lateral drawing.SOLUTION: Provided is a screen device which facilitates maintenance by easily attaching/detaching an internal unit 5 for guiding a lower end part of a screen by a slide rail 12 having one end attached to a lower end of an operation rail by attaching a screen 8 to a screen frame 1 between a support member 9 opposed to a side frame 3 and the operation rail 10. In the mounting of the internal unit, a guide housing space 16 is formed between the side frame and the support member, and the screen and the operation rail are assembled to the screen frame while housing the slide rail in the space, so that the work is facilitated.SELECTED DRAWING: Figure 6

Description

  The present invention includes a slide rail that holds and guides the lower end of the screen that opens and closes by horizontal pulling, and the slide rail moves from the lower end of one side frame of the screen frame into the side frame according to the opening and closing of the screen. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal screen device which is of a barrier-free type having a configuration for entering and exiting, and which facilitates assembling of an internal unit and detachment for maintenance or the like of a screen frame installed in an opening of a building.

  In a screen device in which the screen is freely extended by alternately folding the screen in the opposite direction, and which can be opened and closed by horizontal pulling, a slide rail for guiding a lower end of the screen in accordance with opening and closing of the screen is provided with a slide rail of the screen. Japanese Patent Application Laid-Open Publication No. 2002-210, for example, discloses that a frame member arranged at at least one end in the opening and closing direction is allowed to enter and exit from a lower end portion of the frame material and to be guided in and out along a lower end portion of the screen in a stretched state. 1 and Patent Document 2. In such a screen device, when the screen is stored, the slide rails are also stored in the frame material from the stretched position of the screen, whereby the installation position of the screen device is made barrier-free when the screen is stored. Because of this, it is frequently used in various buildings.

  Thus, a screen device having a slide rail of this type not only allows it to be easily and inexpensively installed in a building opening, but also simplifies the structure of each part in order to improve its maintainability. Prior to that, the screen frame forming the outer frame of the screen device, assembling of various internal units to be accommodated in the screen frame, and removal of the internal unit for maintenance and the like of the screen frame may be performed before that. However, it is necessary that the configuration be easy and simple. However, at present, it has not been proposed as a configuration having a satisfactory configuration.

  In particular, in the above-mentioned known screen device, an internal unit including a slide rail or the like housed in the screen frame is relatively positioned with respect to the screen frame directly installed in the opening of the building with the opening and closing operation of the screen. Because of the complicated displacement, the internal unit including the slide rail guides the lower end of the screen without interfering with various parts, and furthermore, the internal unit is taken out for maintenance of the screen device, and the internal unit is removed. It is desired that the assembly be made simple and easy. In adopting such a configuration, it is desired to suppress an increase in the apparent size of the screen frame by using auxiliary parts or the like.

JP 2005-23578 A JP 2005-36518 A

  The technical problem of the present invention is to provide a product in which the above problem is solved in the above-described horizontal drawing screen device having a slide rail that holds and guides a lower end portion of a screen that opens and closes by horizontal pulling, More specifically, in the horizontal screen device, for a screen frame fixedly installed in a building opening, an internal unit including a slide rail or the like to be accommodated in the screen frame may interfere with other components. It is another object of the present invention to provide a horizontal screen device which can be easily assembled and operated stably in such a manner that there is no problem, and can be easily disassembled for maintenance.

In order to solve the above-mentioned problems, according to the present invention, a screen frame forming an outer frame of a screen device to be installed in an opening of a building, and the screen frame is assembled to the screen frame and formed to be freely openable and closable by an operation frame. What is claimed is: 1. A horizontal screen device comprising: an expandable screen; and an internal unit having a slide rail for holding the lower end portion of the screen and guiding the screen, wherein the horizontal screen has the following characteristic configuration. An apparatus is provided.
Such a configuration, in particular, a screen frame forming the outer frame of the screen device, a screen which is assembled to the screen frame and opened and closed by the operation frame by the operation frame, and a lower end of the screen. It is a basic configuration effective for solving the above-mentioned problem that the configuration mainly includes two elements, that is, an internal unit having a slide rail for guiding the section.

  One of the characteristic configurations of the present invention is, first, the screen frame, along the upper frame of the upper side thereof, the screen, a support member disposed opposite to the side frame disposed at one end of the upper frame. A support member is provided between the operation frame and the operation frame so that the operation frame can be opened and closed by pulling the operation frame in a horizontal direction, and the support member facing the side frame is detachably engageable with the side frame. A guide accommodating space for accommodating the slide rail of the internal unit so as to be able to be guided in and out from the lower portion is formed therebetween.

  Further, the slide rail of the present invention, which holds the lower end of the screen and guides the extension thereof, connects a large number of short groove-shaped guide pieces that receive the lower end of the screen, and connects the connecting portions of the adjacent guide pieces to each other. It is formed in a long groove shape by rotatably connecting, but as a characteristic configuration of the present invention, one end of the slide rail is connected to the lower end of the operation frame, and the other end is connected to the side frame and the support In the guide accommodating space between the members, it is formed so as to be bent upward from the lower end thereof so as to be inserted therethrough, and the guide pieces are provided with projecting projections on both side portions thereof. A guide surface for guiding the guide piece into and out of the guide accommodating space along a required path by sliding the guide protrusion is formed.

  Further, in the present invention, the slide rail is inserted along the guide surface of the support member up to the inner end of the guide accommodating space, and the internal unit in which the support member, the screen, and the operation frame are assembled together, They are formed in such a size that they can be attached to and detached from the screen frame assembled to the building opening.

  In a preferred embodiment of the horizontal drawing screen device according to the present invention, when the side frame and the support member in the screen frame to contact the support member, when they are fixed to each other, the side frame The space between the frame and the supporting member is configured to have a contact surface for positioning so that the space becomes the required guide accommodating space for inserting the slide rail.

  In another preferred embodiment of the horizontal drawing screen device according to the present invention, a lower end surface of the operation frame and a lower surface of a guide piece of a slide rail connected to a lower end of the operation frame slide with opening and closing of the screen. On the lower frame of the opening of the building, a thin strip-shaped lower rail that guides the sliding of the guide frame of the operation frame and the slide rail is laid, and the lower rail of the lower frame of the operation frame and the lower surface of the guide piece straddle the lower rail. A concave groove is provided for riding and sliding.

  In another preferred embodiment of the horizontal screen device according to the present invention, on the lower frame of the building opening, the operation frame is laid in a range from a storage position of the screen to a position where the screen starts to be extended. The lower rail is a first rail portion, and the lower rail in a range from a portion beyond the first rail portion to a position where the operation frame reaches the extended position of the screen is a second rail portion. The one rail portion has a hook-shaped engaging ridge protruding from an upper portion of the side surface of the thin strip-shaped rail main body except for a range in which the guide piece moves along the guide surface of the guide housing space. When the hook-shaped projections provided on both sides of the lower surface of the guide piece led out below engage with the hook-shaped engaging ridges, the operation frame and the guide piece on the first rail portion are moved. No. 1 Configured as never disengaged from the pole tip.

  Further, the second rail portion has a hook-shaped weak engagement ridge protruding from the upper side surface of the thin strip-shaped rail main body, and the hook-shaped weak engagement ridge is formed on the lower end surface of the operation frame. There is no protrusion amount enough to securely engage the protrusion, and the operation frame can be detached from the second rail portion by a shift of the engagement position. When a large number are connected, it is difficult for them to be separated from the second rail portion. However, if only a small number of hook-shaped projections of the guide pieces are engaged with the second rail portion, the second pieces are displaced in the traveling direction of the guide pieces. It is configured to be detachable from the rail portion, thereby forming a detachment prevention mechanism that prevents the internal unit in which the support member, the screen, and the operation frame are assembled together from being detached from the screen frame attached to the opening of the building. Is done.

  When installing the horizontal screen device having the above-described configuration in a building opening, a screen frame forming an outer frame of the screen device is attached to a building opening where the horizontal screen device is to be installed in advance, Subsequently, a screen which can be opened and closed by laterally pulling the operation frame is stretched between the support frame and the support frame disposed opposite to the side frame provided at one end of the upper frame, and A slide rail that guides the extension of the lower end of the screen connected to the lower end of the operation frame is provided by sliding a guide protrusion projecting from both sides of the guide piece onto a guide surface provided on the support member. An internal unit including a screen, an operation frame, a slide rail, and the like is assembled to the support member, and the internal unit is ready to be assembled to the screen frame. To be held.

  In a state where the internal unit is ready for assembly, the internal unit is formed in a size that can be mounted on the screen frame assembled in the opening of the building. Can be easily mounted. Further, in this state, by fixing the support member of the internal unit fitted in the screen frame to the side frame attached to one end of the upper frame of the screen frame, the internal unit is A predetermined guide receiving space for inserting the slide rail is formed between the support member and the side frame of the screen frame, and is positioned and locked on the screen frame.

  When the internal unit is attached to the screen frame at the opening of the building in this way, the screen can be freely opened and closed by operating the operation frame. In addition, when any trouble occurs in the horizontal screen device installed in this way and maintenance is required, the internal unit is temporarily moved to the storage position by operating the operation frame, that is, the internal unit is ready for assembly. In this state, the support member of the internal unit fitted in the screen frame is detached from the side frame of the screen frame, and the operation frame and slide rail of the internal unit are moved to the second rail portion of the screen frame. When located on the upper side, the operation frame and the slide rail can be easily detached from the second rail portion of the lower rail, so that the internal unit can be easily detached from the lower rail. By pulling out from the guide accommodating space, each part of the internal unit can be easily maintained and inspected or repaired.

  According to the horizontal drawing screen device of the present invention described in detail above, the above problem was solved in the above horizontal drawing screen device provided with the slide rail that holds and guides the lower end portion of the screen that opens and closes by horizontal pulling. Product, and more specifically, in the horizontal screen device, for a screen frame fixedly installed in a building opening, an internal unit including a slide rail and the like to be accommodated in the screen frame. Can be easily assembled and operated stably so as not to interfere with other parts, and disassembly for maintenance can be easily performed.

It is a front view which shows typically the structure of the screen accommodation state in the Example of the horizontal drawing screen apparatus which concerns on this invention. It is a horizontal sectional view showing the same composition typically. FIG. 3 is a front view schematically showing a semi-extended state of the screen in the embodiment. FIG. 4 is a longitudinal sectional view schematically showing the configuration of the screen device in the state of FIG. 3. FIG. 4 is a schematic explanatory view showing a mode of incorporating an internal unit into a screen frame. FIG. 6 is a schematic explanatory view showing a state in which the incorporation of the internal unit in the mode shown in FIG. 5 has been completed. (A) is a perspective view showing a state in which assembling of the slide guide to the support member is started, and (b) is a perspective view in a state where the assembling is further advanced. It is a partially broken perspective view of a lower rail. (A)-(d) is a cross-sectional view showing a mode of engagement between a lower rail installed on a lower side of a building opening, a lower end surface of an operation frame moving thereon, and a concave groove on a lower surface of a guide piece. (A) shows the engagement relationship between the first rail portion of the lower rail and the groove of the operation frame, (b) shows the engagement relationship between the first rail portion and the groove of the guide piece, and (c). Shows the engagement relationship between the second rail portion and the groove of the operation frame, and (d) shows the engagement relationship between the second rail portion and the groove of the guide piece.

1 to 4 show an outline of an embodiment of a horizontal drawing screen device according to the present invention, and FIGS. 5 and 6 show a process of mounting an internal unit 5 to the screen frame 1 described later.
This horizontal drawing screen device basically has a slide rail 12 for holding and guiding the lower end of the screen 8 which is opened and closed by horizontal pulling. In the illustrated embodiment, as shown in FIG. In addition, a case is shown in which a screen 8 is used which is alternately folded in the opposite direction at a constant width so as to be freely extendable, but the screen is suitable for this type of horizontal drawing screen device, and is not necessarily limited thereto. Absent.

  Explaining the specific components of the illustrated embodiment, the horizontal drawing screen device includes, as main components, a screen frame 1 that forms an outer frame of a screen device to be installed in a building opening (not shown). An internal unit 5 having the expandable screen 8 assembled to the screen frame so as to be openable and closable by an operation frame 10 and a slide rail 12 for holding the lower end of the screen and guiding the expansion; Are provided.

The screen frame 1 guides the lateral movement of the upper end of the operation frame 10 attached to one end of the screen 8 by the downward groove 2a shown in FIG. The frame 2, one side frame 3 for holding the screen 8, which has been stored by folding, via a support member 9 (FIG. 2), and the screen 8 in an extended state at a position facing the side frame 3. A receiving frame 4 for receiving the operation frame 10 is provided, and in the illustrated embodiment, a lower frame facing the upper frame 2 is not provided, but it can be provided if necessary.
If the screen frame 1 itself does not have a lower frame, the building opening frame located at the lower part of the screen frame 1 itself will function as a lower frame, or the lower rail 20 described later will have the same. It can also function as a lower frame.

  On the other hand, a screen unit 7, which constitutes a part of the internal unit 5 to be assembled to the screen frame 1, includes a support member 9 disposed opposite to the side frame 3 provided at one end of the upper frame 2, and the operation frame 10. And the supporting member 9 and the operation frame 10 are connected to both ends of the screen 8 by sandwiching the expandable screen 8 therebetween from both sides. Are formed so that they can be freely opened and closed by horizontal pulling. The screen unit 7 is connected to the lower end of the operation frame 10 and extends along the lower end of the screen 8, and is a slide rail arranged to hold the lower end of the screen and guide the extension thereof. 12 are provided. The slide rail 12 is led out along the lower end of the screen 8 in the stretched state, and is also effective for suppressing the lower end of the screen 8 from swinging due to external force such as wind.

  As shown in FIGS. 1, 3, 6 and 7, etc., the slide rail 12 is provided with a large number of short groove-shaped guide pieces 13 for receiving the lower end of the screen 8 and at the upper part of the connecting portion 13a of the adjacent guide pieces. Are connected to each other so as to be rotatable with each other, but the adjacent guide pieces 13 at the connecting portion 13a may be connected so that the connecting portion can be bent concavely upward. For example, as shown in FIG. 7, a series of flexible wires 15 are inserted through insertion holes 13c formed along upper ends of a pair of side walls 13b, 13b provided on both sides of each guide piece 13. And connecting the adjacent guide pieces 13 with a contact surface orthogonal to the insertion hole 13c, or connecting the adjacent guide pieces 13 at the upper part of the side wall thereof with a pin or the like so as to be able to bend. Adopt a configuration such as It is possible.

  The slide rail 12 formed by the connection of the guide pieces 13 has one end connected to the lower end of the operation frame 10 and the other end connected to the side frame 3 by the bendable connection of the guide pieces 13. The guide accommodating space 16 formed between the support member 9 and the guide accommodating space 16 is formed so as to be bent upward from the lower end thereof so as to be inserted therethrough. The movement of the slide rail 12 is desirably a smooth movement. Therefore, as shown in FIG. 7, the guide piece 13 is provided with guide protrusions 13d projecting from the upper ends of the side walls 13b on both sides thereof. On the other hand, in the support member 9, a guide surface 17 is formed in the guide accommodating space 16 so that the guide projection 13d slides and guides the guide piece 13 smoothly along a required path. .

With such a configuration of the slide rail 12, since the guide protrusions 13d of the large number of guide pieces 13 come into contact with the guide surface 17 at multiple points, the guide protrusions 13d are uniformly contacted by the guide surface 17d. , And some of the guide projections 13d do not strongly contact the guide surface 17, so that the movement of the guide piece 13 along the guide surface is facilitated.
Further, the support member 9 having the guide surface 17 is formed by joining an upper member 18a formed of a mold material and a lower member 18b formed of a molded product having a curved surface. It can also be configured as

  The support member 9 opposed to the side frame 3 of the screen frame 1 has its receiving frame 4 side surface as a fixing surface for fixing one end of the screen 8 and at the same time as a storage area when the screen 8 is folded. The back side of the support member 9 can be detachably contacted and fixed to the side frame 3 by engagement or other appropriate means, and the slide rail 12 of the internal unit 5 is held between them. A guide accommodating space 16 for accommodating the guide so as to be able to be led out from below is formed. Therefore, between the side frame 3 for forming the guide accommodating space 16 and the support member 9, a contact surface for positioning the support member 9 with respect to the side frame 3 is appropriately provided, and the support member 9 is provided. It is necessary to provide the contact surfaces 3a and 9a for holding 9 in its positioning position. Thereby, between the side frame 3 and the support member 9, the required guide accommodation space 16 for inserting the slide rail 12 therebetween is formed when they are abutted and fixed to each other. The positioning is performed so that they are fixed and stable, and at the same time, easily detachable.

  As described above, the slide rail 12 is inserted along the guide surface 17 of the support member 9 to the inner end of the guide accommodating space 16, and at the same time, the support member 9, the screen 8, and the operation frame 10 are assembled together. It is necessary to assemble the internal unit 5 in the screen frame 1 in which it is installed at the opening of the building. The assembling is performed with the internal unit 5 inclined with respect to the screen frame 1 as shown in FIG. Considering that there is a downward groove 2a for guiding the upper end of the operation frame 10 in the upper frame 2 of the screen frame 1, and the like, the internal unit 5 is in this state. Obviously, it can be formed in the screen frame 1 so as to be removable. In particular, the configuration in which the slide rail 12 is accommodated in the guide accommodation space 16 along the guide surface 17 of the support member 9 is very effective for simplifying handling when assembling the internal unit 5.

  Further, in the above-mentioned horizontal drawing screen device, since the slide rails 12 have a barrier-free configuration in which the slide rails 12 enter and exit from the lower end of the side frame 3 of the screen frame 1 in accordance with opening and closing of the screen 8, In order for the screen 8 to be stably opened and closed by the operation frame 10, it is desired to add a configuration that guides the expansion of the screen by some means and opens and closes it on a substantially constant path. The lower frame of the opening of the building, in which the lower end surface of the operation frame 10 and the lower surface of the guide piece 13 of the slide rail 12 connected to the lower end of the operation frame slide with the opening and closing of the screen 8, is provided. A lower rail 20 is laid on the upper part of the operation frame 10 and the slide rail 12 to guide the sliding of the guide piece 13 of the slide rail 12 (see FIGS. 1 and 8). If the grooves 11 and 24 are provided on the end face and the lower surface of the guide piece 13 so as to straddle and slide on the lower rail 20 as shown in FIG. If not, some guidance can be provided.

However, the operation frame 10 and the guide mechanism of the guide piece 13 as described below with reference to FIG. 9 can be used to more stably open and close the operation frame 10.
The configuration will be specifically described with reference to FIGS. 8 and 9A to 9D. First, the lower rail 20 installed on the lower frame of the above-mentioned opening of the building is configured such that the operation frame 10 is the same as that of FIG. The lower rail laid in the range from the storage position of the screen 8 to the position where the expansion of the screen is slightly started as shown in FIG. 1 is a first rail portion 21 described below, and from a portion beyond the first rail portion. The lower rail in a range until the operation frame 10 reaches the extended position of the screen 8 needs to be a second rail portion 22 described below.

  The difference between the first rail portion 21 and the second rail portion 22 will be described in relation to an operation frame and a guide piece. As shown in FIGS. The state moves along the guide surface 17 of the upper guide accommodating space 16 and moves to a position above the rail main body 23 of the lower rail 20. Although it is not necessary to consider the relationship between the frame and the rail body, as shown in FIG. 1, when the operation frame 10 is in contact with the side frame 3, as shown in FIG. Engaging the hook-shaped protrusions 11a provided on both sides of the lower end of the hook 10 with the hook-shaped engagement protrusions 21a provided on the upper side surface of the rail body 23 is effective for stably maintaining the operation frame. .

  In addition, by moving the operation frame 10 from the screen storage position, the guide piece 13 that has moved downward along the guide surface 17 of the guide storage space 16 rides on the rail body 23 of the lower rail 20 and At the stage of exiting from the inside, the pair of hook-shaped protrusions 24a provided on both sides of the lower surface of the guide piece 13 are engaged with the lower portion of the hook-shaped engagement ridge 21a protruding from the upper side of the rail body 23. As a result, the guide piece 13 guided on the lower rail 20 is prevented from coming off the first rail portion 21. Therefore, except for the starting end 25 of the first rail portion 21 where the guide piece 13 straddles the rail body 23 in the side frame 3, a hook-shaped engagement is formed on the upper side surface of the rail body 23 of the first rail portion 21. The protrusion 21a is projected.

On the other hand, the second rail portion 22 has a hook-shaped weak engagement ridge 22a protruding at the upper part on both sides of the rail body 23. The hook-shaped weak engagement ridge 22a is formed on the lower end surface of the operation frame 10. There is no protrusion amount enough to securely engage with the hook-shaped protrusion 11a, and the operation frame 10 can be detached from the second rail portion due to displacement of the engagement position (see FIG. 9 (c)). The hook-shaped weak engaging ridges 22a are difficult to separate from the second rail portion 22 when a large number of the guide pieces 13 are connected, but only the hook-shaped protrusions 24a of the small number of guide pieces are in the second position. If the guide piece 13 is not engaged with the rail portion 22, the guide piece 13 can be separated from the second rail portion 22 by a lateral displacement in the traveling direction (see FIG. 9D).
Thus, a detachment prevention mechanism is configured to prevent the internal unit 5 in a state where the support member 9, the screen 8, and the operation frame 10 are attached to each other from the screen frame 1 attached to the opening of the building.

  Reference numeral 27 shown in FIGS. 1 and 3 and the like denotes a parallel operation frame that is hung between the screen frame 1 and the operation frame 10 to translate the operation frame 10 in parallel with the side frame 3. The wire for movement is shown.

DESCRIPTION OF SYMBOLS 1 Screen frame 2 Upper frame 3 Side frame 5 Internal unit 8 Screen 9 Support member 9a Contact surface 10 Operation frame 12 Slide rail 13 Guide piece 13d Guide projection 16 Guide accommodation space 17 Guide surface

Claims (4)

A screen frame that forms an outer frame of a screen device for installation in a building opening, an expandable screen that is assembled to the screen frame and formed to be freely openable and closable by an operation frame and holds a lower end of the screen. A horizontal drawing screen device constituted by an internal unit having a slide rail for guiding the extension thereof.
The screen frame has, along the upper frame of the upper side thereof, the screen, between the support member disposed opposite to the side frame disposed at one end of the upper frame and the operation frame, and The support member, which is stretched so as to be openable and closable by pulling and is opposed to the side frame, can be detachably engaged and fixed to the side frame, and the slide rail of the internal unit is led out from the lower portion therebetween. To form a guide accommodation space for accommodating
On the other hand, a slide rail that holds the lower end portion of the screen and guides the extension thereof enables a large number of short groove-shaped guide pieces that receive the lower end portion of the screen to rotate a connecting portion of the adjacent guide pieces with each other. The end of the slide rail is connected to the lower end of the operation frame, and the other end is inserted into the guide accommodating space between the side frame and the support member. The guide piece is formed so as to be bent and insertable, and the guide piece is provided with projecting protrusions on both sides thereof, and the guide piece is slid in the guide accommodating space so that the guide piece is formed as described above. Form a guide surface that guides in and out of the guide accommodating space along the required route,
The internal unit in which the slide rail is inserted along the guide surface of the support member to the inner end of the guide accommodating space and the support member, the screen, and the operation frame are assembled with each other, are assembled into the opening of the building. Is formed in a size that can be mounted and dismounted on the screen frame,
A horizontal screen device characterized by the above-mentioned. The horizontal screen device according to claim 1,
The space between the side frame and the support member passes through the slide rail when the side frame and the support member of the screen frame that contact the support member are fixed to each other. It is configured as having a contact surface for positioning so as to be the required guide accommodating space for
A horizontal screen device characterized by the above-mentioned. The horizontal screen device according to claim 1 or 2,
The lower end surface of the operation frame and the lower surface of the guide piece of the slide rail connected to the lower end of the operation frame are placed on the lower frame of a building opening where the screen slides as the screen is opened and closed. A thin strip-shaped lower rail that guides the sliding of the piece is laid, and a concave groove is provided on the lower end surface of the operation frame and the lower surface of the guide piece so as to straddle and slide on the lower rail.
A horizontal screen device characterized by the above-mentioned. The horizontal screen device according to claim 3,
On the lower frame of the building opening, the lower rail laid in a range from the storage position of the screen to the position where the screen starts to be extended is referred to as a first rail portion, and the first rail portion is referred to as a first rail portion. The lower rail in the range from the crossed portion to the operation frame reaching the extended position of the screen is a second rail portion,
The first rail portion has a hook-shaped engaging ridge protruding from an upper portion of a side surface of a thin strip-shaped rail main body, except for a range in which the guide piece moves along a guide surface of the guide housing space. Hook-shaped protrusions provided on both sides of the lower surface of the guide piece led out from the space below the space engage with the hook-shaped engaging ridges, so that the operation frame and the guide piece on the first rail portion are provided. Does not separate from the first rail,
On the other hand, the second rail portion has a hook-shaped weak engagement ridge protruding from the upper side surface of the thin strip-shaped rail main body, and the hook-shaped weak engagement ridge is formed on the lower end surface of the operation frame. There is no protrusion amount enough to securely engage the protrusion, and the operation frame can be detached from the second rail portion by a shift of the engagement position. When a large number are connected, it is difficult for them to be separated from the second rail portion. However, if only a small number of hook-shaped projections of the guide pieces are engaged with the second rail portion, the second pieces are displaced in the traveling direction of the guide pieces. It is configured to be detachable from the rail,
Thereby, a detachment prevention mechanism is configured to prevent the internal unit in a state where the support member, the screen, and the operation frame are attached to each other from being detached from the screen frame attached to the opening of the building.
A horizontal screen device characterized by the above-mentioned.

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