KR100914254B1 - Opening and closing device of window - Google Patents

Abstract

An opening/closing device of a sliding window can provide secure and stable opening/closing as the cylinder body and the piston rod are hinged via a hinge and a bracket. An opening/closing device of a sliding window comprises a cylinder support(10), a cylinder body fixing bracket(20), a piston rod fixing bracket(30), a cylinder(40), a cover, and a drive and control unit(60). The cylinder support is attached to the lower or upper part of a window frame(100) to support the cylinder. The cylinder body fixing bracket is inserted and fixed in a guide rail formed on the cylinder support. The piston rod fixing bracket is attached to a window frame(200) on the location corresponding to the cylinder support. The cylinder includes a body(41) hinged on the cylinder body fixing bracket, and a piston rod(42) hinged on the piston rod fixing bracket. The cover is combined in the cylinder support to prevent the cylinder combined in the cylinder support from being exposed. The drive and control device controls the operation of the cylinder.

Description

Opening and Closing Device of Window

The present invention relates to an opening and closing device of a sliding window, which can be easily applied to existing sliding windows, and mechanically opens and closes a window that is difficult to open and close manually, and facilitates a window as part of building an automation system of a factory or a building. It relates to an opening and closing device of a sliding window that can be opened and closed easily.

In general, most buildings are equipped with a number of windows for ventilation, sound insulation, heat insulation, etc. These windows are installed to open and close as needed.

When the height of the window is installed in a high position out of reach of people, or when the size of the window is large and it is not easy to open and close only by human force, or when the window is opened and closed programmatically by a factory automation facility, In the case where ventilation, temperature control, etc., such as a barn, need to be managed continuously, an opening and closing device is additionally installed to enable automatic opening and closing by using power such as a motor or a cylinder.

Especially in the case of factories, concert halls, gymnasiums, greenhouses, warehouses, barns, etc., the height of the ceiling is high, and the windows are installed at a very high position so as to use ladders or cranes. It is convenient to install and operate separately, and it is easy to manage, and convenience is improved by opening / closing windows mechanically in general home.

Conventionally, such a switchgear, Republic of Korea Patent Publication No. 10-1993-0003438 "opening and closing device of the elevated window", registered utility model No. 20-0246982 "window opening and closing device using a pneumatic system,", Patent Publication No. 10-2004 -0095066 "Automatic opening and closing device of a ventilation window for a factory" and 10-2007-0009951 "Pneumatic window opening and closing system" are known. It is fixed by using brackets, and the other side of the pneumatic cylinder is fixed to the window frame constituting the casement window by using brackets. have.

These window opening and closing devices are applied to a sliding window that opens and closes a window by a stroke of a cylinder in which one side of the window frame is coupled to the window frame by a hinge structure, and supports the window frame on a rail formed on the window frame to slide the window frame. It is difficult to apply to sliding windows of structures.

In other words, the opening and closing device of the conventional sliding door is configured to transmit the load applied from the window to the window frame by the opening and closing device of the cylinder structure to accommodate the load such as wind pressure and window weight applied through the window. Durable durability is required, and the coupling position, angle, etc. of the cylinder must be precisely selected to properly control the opening and closing amount and to maintain the reliability of opening and closing.

In the case of sliding windows, since the window is opened and closed while moving on the rail while being supported by the window frame, the weight or wind pressure applied to the window has little effect on the structure of the switchgear. The driving force is also not a major consideration because the window is opened and closed by a small force due to the rolling motion of the rollers and the rails. However, in order to properly control the amount of opening and closing and to maintain the reliability of opening and closing, the position of the cylinder should be precisely selected, and the additional pressure over the allowable pressure should be properly blocked during the full opening and closing of the window, and the window is warped or the window frame There is a need for a structure that adequately solves local loads, caused by factors such as mismatches in the axis of motion between the frame and the window frame support, causing trouble at the joints between the components and reducing durability.

In addition, because the sliding window is installed in the place where most people reach, the aesthetics should be considered, should not be dangerous to users, and a structure that can be protected from external factors such as piston rod.

The present invention can be easily applied to existing sliding windows, and has an object of presenting a sliding window opening and closing device by a cylinder having a reliable structure of opening and closing operation.

In addition, the present invention can appropriately control the amount of opening and closing, maintain the reliability of opening and closing, can properly block the action of additional pressure above the allowable pressure in the full opening and closing step of the window, the window is warped or between the window frame and the window frame support point The purpose of the present invention is to provide a sliding window opening and closing device having a structure that can solve the local load caused by the mismatch of the movement axis.

In addition, an object of the present invention is to provide a sliding window opening and closing device of a structure such as a piston rod is protected from external factors, safe, and does not harm the aesthetics as an indoor window installation.

In addition, the present invention minimizes the damage of the existing window frame and the window frame according to the construction of the window opening and closing device, and the construction is made easily, the sliding type that can easily and easily perform the exchange or fixing position adjustment of the cylinder, etc. in the installation state It aims to present a window opening and closing device.

The present invention is to achieve the above object, the present invention is attached to the lower or upper portion of the window frame for supporting the cylinder and the guide rail is formed in the left and right length direction of the window frame in the cylinder support to support the cylinder A cylinder body fixing bracket inserted into and fixed to the cylinder body, a piston rod fixing bracket attached to the window frame corresponding to the position at which the cylinder support is installed, and a body hingedly coupled to the cylinder body fixing bracket, and the piston rod fixing the piston rod. A cylinder hinged to the bracket, a cover coupled to the cylinder support such that the cylinder is not exposed when the cylinder is coupled to the cylinder support, and driving and control means for driving and controlling the cylinder. It presents an opening and closing device of a sliding window characterized by.

The cylinder support according to the present invention is formed in the longitudinal direction at the end of the cylinder mounting portion, the cylinder mounting portion formed perpendicular to the attachment portion, the planar attachment portion is maintained in the longitudinal direction of the window frame in the longitudinal direction It is characterized by consisting of a cover engaging portion configured to engage the cover.

In addition, the attachment portion of the cylinder support according to the invention is characterized in that the protruding end in the longitudinal direction is formed so as to be caught in the form of "┓" on the inner horizontal surface of the window frame.

In addition, the cylinder mounting portion of the cylinder support according to the present invention is inserted into the cylinder body fixing bracket can move in the longitudinal direction and determine the fixed position, it is made of a structure formed with a "┏ ┓" type guide rail to be fixed by a clamping screw It features.

In addition, the piston rod fixing bracket according to the present invention has an attachment portion attached to the window frame, an arc-shaped hinge coupling portion protruding perpendicular to the attachment portion, and for coupling the piston rod end of the cylinder to the hinge coupling portion A hinge, a piece for attaching the attachment portion to the window frame, and a support in the form of a "┏┓" at the attachment portion to relieve the step between the movement axis of the piston rod of the cylinder and the window frame while attached to the cylinder support. And a planar attachment portion integrally formed with an arc-shaped hinge coupling portion in a state in which the support is fixed to the window frame by the piece, is configured to be attached and fixed to the support by a second piece.

In addition, the cylinder according to the present invention may be composed of an electric cylinder in which the inward movement of the piston rod is made by forward and reverse rotation of the cylinder drive motor by the selection of the switch, and the pneumatic pressure provided from the pneumatic unit is controlled by the selection of the switch. It may be configured as a pneumatic cylinder is provided to the cylinder through the opening and closing valve is made to move the piston rod.

In addition, the present invention provides the opening and closing information of the window to the control unit to interrupt the driving of the cylinder to drive the driving force of the cylinder in the state that the window is completely closed or open, or the driving force is removed when the window is not fully opened or less closed Characterized in that the opening and closing detection means for preventing that.

Cylinder support according to the present invention provides an effect that can be installed simply and firmly on the window frame of the existing sliding window.

In addition, the hinge and bracket combine the cylinder body and the piston rod into the hinge structure, so that the opening and closing operation is assured and stable. Local load can be effectively eliminated to reduce durability due to various troubles in the coupling portion.

In addition, the present invention can adjust the opening and closing amount of the window at any time by adjusting the movement amount of the piston rod by the switch operation constituting the control unit, the additional distance acting more than the allowable pressure in the complete opening and closing step of the window stroke distance of the piston rod In addition to the adjustment, it can be properly blocked by the limit switch to ensure the reliability of the opening and closing operation.

In addition, the present invention has the advantage that the components such as the piston rod is protected by the cover, safe to block out of the human hand, and does not harm the aesthetics as an indoor window installation.

In addition, the present invention is a cylinder body fixing bracket is movable on the guide rail, it is fixed by the clamping screws, there is no need to drill a screw hole to hold the cylinder fixed position, the existing window according to the construction of the window opening and closing device The damage of the frame and the window frame can be minimized, the construction is made easily, and there is an advantage in that the installation and replacement of the cylinder and the fixed position can be easily and conveniently performed in the installed state.

A preferred embodiment of the sliding window opening and closing device according to the present invention will be described in detail with reference to the drawings.

1 and 2 illustrate a state diagram in which a window opening and closing apparatus according to the present invention is applied to a window, and FIG. 3 is a view illustrating a configuration relationship of the present invention, and is attached to a lower or upper portion of a window frame 100 to provide a cylinder. A cylinder body fixing bracket 20 inserted into and fixed to a guide rail formed in the left and right lengthwise direction of the window frame to the cylinder support 10 for supporting the cylinder, the cylinder support 10, and the cylinder support 10 for supporting the cylinder; Is fixed to the piston rod fixing bracket 30 attached to the window frame 200 corresponding to the installation position, and the body is hinged to the cylinder body fixing bracket 20, the piston rod is a piston rod fixing bracket 30 A cylinder 40 hinged to the cover, a cover 50 coupled to the cylinder support so that the cylinder is not exposed while the cylinder is coupled to the cylinder support, and the cylinder is driven; It comprises a drive and control means 60 for controlling.

The cylinder support 10 serves to support and fix the cylinder to the window frame in opening or closing the window by pushing or pulling the window by the stroke of the cylinder, and is composed of a lightweight chassis such as aluminum, and may be configured in various forms.

The illustrated cylinder support 10 embodiment is a planar attachment portion 11 in which the contact surface is maintained in the longitudinal direction of the left and right sides of the window frame so as to effectively and stably support the repetitive opening and closing load of the window through the cylinder, and the attachment It consists of a cylinder mounting portion 12 is formed perpendicular to the portion 11 and the cover coupling portion 13 is formed continuously in the longitudinal direction at the end of the cylinder mounting portion and configured to engage the cover.

In addition, the attachment portion 11 is formed with a continuous end (11a) in the longitudinal direction so as to be caught in a "┓" shape on the inner horizontal surface of the window frame, the cylinder mounting portion 12 in the cylinder body fixing bracket 20 ) Has a structure in which the guide rail 12a is formed so as to be inserted in the longitudinal direction and fixed position.

The attachment part protruding end (11a) is a problem that the fixing piece is loosened and detached by foreign matters such as dust and dust introduced into the gap during driving by removing the gap with the window frame while the flat portion is fixed to the window frame by the piece It effectively prevents and by transmitting the vibration impact force due to the load and the driving load acting on the cylinder support to the window frame to reduce the load acting on the fixing piece, thereby providing the effect of improving the durability of the device.

The guide rail 12a of the cylinder mounting portion 12 functions to insert the cylinder body fixing bracket 20 to be fixed at an arbitrary position.

The guide rails 12a are continuously formed to protrude in a "┏ ┏" shape from the plane constituting the cylinder mounting portion 12, the cylinder body in a state in which the cylinder body fixing bracket 20 is inserted into the guide rail 12a By tightening the clamping screw 24 coupled to the fixing bracket 20, the cylinder body fixing bracket 20 is fixed to both wings of the guide rail 12a, and the cylinder body is hinged to the cylinder body fixing bracket 20. The cylinder support by the cylinder support is achieved by engaging with 23.

The guide rail 12a provides the effect of selecting the cylinder fixing position quickly and accurately. That is, the piston rod stroke distance of the cylinder is equal to the opening and closing distance of the window, so that the window is fully open or closed when the piston rod is fully extended, the open window is completely closed or the closed window is fully open when the piston rod is fully retracted. It is possible to adjust the fixed position of the cylinder so that this adjustment process is made by the guide rail 12a and the clamping screw 24 provides the possible advantage without having to make a hole in the cylinder mounting portion 12.

Cover coupling portion 13 is for coupling the cover 50 to be described later, can be configured in a variety of forms to correspond to the shape of the cover, the illustrated embodiment is fitted to the end of the cylinder mounting portion 12 It has a structure in which the continuous groove 13a is formed so that it can be fixed by the piece 13b.

The cylinder body fixing bracket 20 is attached to the cylinder support to support the cylinder body by a hinge, a planar attachment portion, an arc-shaped hinge coupling portion projecting perpendicularly to the attachment portion, and the attachment portion Screws for attaching to the cylinder support, and a hinge for coupling the cylinder body to the hinge coupling portion.

The illustrated embodiment is a structure that can be attached to the guide rail formed on the cylinder support using the clamping screw 24, the planar attachment portion 21 is fitted to the guide rail (12a) of the cylinder support (10) And an arcuate hinge portion 22 which is formed to protrude perpendicularly to the attachment portion and is exposed to the outside of the guide rail when the guide rail is coupled, and a clamping screw 24 screwed to the attachment portion. By tightening the clamping screw 24 in the state in which the attachment portion 21 is inserted into the guide rail 12a, the cylinder body fixing bracket 20 is tightly fixed to both wings of the guide rail 12a.

A hinge hole 22a is formed in the hinge coupling portion 22 of the cylinder body fixing bracket 20 so that the body 41 of the cylinder 40 is coupled by the hinge 23.

Coupling of the cylinder body by the hinge 23 serves to smoothly open and close the window by providing an appropriate clearance when opening and closing the window by the retraction of the cylinder 40 piston rod 42. That is, the ordinary window and door structure is opened and closed when the cylinder body fixing bracket 20 and the cylinder are rigidly connected by sliding and sliding in a state in which the window frame is loosely coupled to the window frame, unlike the precision mechanical mechanism. The operating load is transferred to the cylinder as it is to reduce the durability, as described above, the cylinder body is coupled by a hinge, the hinge coupling portion 22 of the cylinder body fixing bracket 20 protrudes to the link mechanism It is configured to act like an arm so as to absorb the local load caused by the retreat of the piston rod and to operate smoothly without adding pressure to the opening and closing operation of the coupling element and the window.

In addition, as described above, the cylinder body fixing bracket 20 is fixed to an appropriate position by a clamping screw while moving on the guide rail, so that the guide rail 12a can select the cylinder fixing position quickly and accurately. It provides the advantage that the cylinder can be easily adjusted so that the window is fully open or closed when the piston rod is fully extended and the open window is fully closed or the closed window is fully open when the piston rod is fully retracted. .

The piston rod fixing bracket 30 is attached to the window frame 200 to correspond to the position where the cylinder support 10 is installed is an element for coupling the piston rod head of the cylinder (40).

The piston rod fixing bracket 30 has an attachment portion 31 attached to the window frame, an arc-shaped hinge coupling portion 32 protruding perpendicularly to the attachment portion, and a cylinder (3) on the hinge coupling portion 32. Hinge 33 for engaging the piston rod tip of 40, and a piece 34 for attaching the attachment portion to the window frame.

In the illustrated embodiment, in order to eliminate the step difference between the movement axis of the piston rod of the cylinder and the window frame in the state of being attached to the cylinder support, an additional support 35 having a “┏┓” shape is formed on the attachment portion 31. The second piece on the support 35 is a planar attachment portion 31 formed integrally with the arc-shaped hinge coupling portion 32 in a state where the support 35 is fixed to the window frame by the piece 34. It consists of the structure fixed by attachment with 36.

Cylinder 40 is to provide a driving force for opening and closing the window, hydraulic, pneumatic, electric cylinder can be used, but the hydraulic cylinder is not appropriate due to problems such as the use of the hydraulic hose, oil and oil leakage, pneumatic And electric cylinders are preferred.

Cylinders using pneumatics have the advantage that the opening and closing load of the window is not large, and the load can be absorbed by the compression characteristics of the air when it is overloaded, so that the loss of the window and the window frame due to excessive pressure can be properly prevented. It can be suitably applied to a factory or a medium-large building with a small burden due to the equipment and operation.

The electric cylinder has a simple configuration of the device by moving the piston rod forward and backward by the forward and reverse rotation of the built-in driving motor, and can be conveniently used in individual houses or small facilities.

The cover 50 is an element which prevents the elements such as the cylinder and the bracket which moves forward and backward, and is formed in a continuous plane and an arc shape in the upper portion thereof, and the lower end of the plane is the cover coupling hole 13 of the cylinder support 10. It is fitted in the groove (13a) and fixed by the piece (13b), it is configured to act to block the exposure to the outside wrapped around the upper surface including the cylinder.

The cover prevents components such as cylinders from being exposed to the outside to improve aesthetics, to protect internal components and to use them safely, and that impurities such as dust accumulate on sliding surfaces of piston rods to cause wear. It acts to prevent it.

The configuration includes drive and control means (not shown) for driving and controlling the cylinder.

The driving and control means has a structure for instructing and performing the opening and closing operation of the cylinder according to the opening and closing signal of the switch, etc., and in the case of applying the electric cylinder, the control unit for instructing the forward and reverse rotation operation of the drive motor inside the cylinder according to the selection of the switch. It includes, the control unit detects the opening and closing state of the window to provide the opening and closing information to the control unit to interrupt the power supplied to the drive motor by the driving force of the cylinder in the fully closed or open state is applied to the cylinder or the window is not opened completely Opening and closing detection means for detecting the open and close state is included to solve the problem that the driving force is removed in a less or less closed state.

In the case of applying a pneumatic cylinder, a control unit for driving a cylinder by controlling an opening / closing valve according to selection of a switch, and a pneumatic unit for supplying air pressure to the cylinder, and the control unit detects the opening / closing state of a window to open and close the information. To control the pneumatic pressure supplied to the cylinder to control the problem that the driving force of the cylinder is applied when the window is completely closed or opened, or the driving force is removed when the window is not fully opened or less closed. Opening and closing means for sensing is included.

The illustrated embodiment shows a configuration in which the limit switch 60 is installed at both ends of the window frame as the opening and closing detection means applied to the pneumatic cylinder, and the sensing end 61 is installed in the corresponding window frame, and the piston rod fixing bracket (30) shows the structure to be used as the detection stage of the limit switch for detecting the open state of the window.

Opening and closing of the window to which the present invention is applied can be configured by connecting the control means to the building automation system, in which case it can be integrated control such as opening of the window for ventilation, information such as temperature sensor or fire detection sensor It can be implemented in a structure that is automatically opened and closed in conjunction with.

The opening and closing device by the structure provides an advantage that can be easily applied to the existing window to configure the automatic opening and closing device, the installation process proceeds to the following steps.

First, the installation worker attaches the cylinder support 10 to the lower or upper frame of the window frame, and drives the piece 11b at regular intervals to firmly attach the cylinder support and the window frame.

At this time, as shown in Figure 5, the protruding end (11a) of the cylinder support is attached so as to be in close contact with the horizontal plane of the window frame, the window frame and the cylinder support is made firmly, the foreign matter is a gap between the window frame and the attachment portion of the cylinder support Allows you to block incoming

Next, the cylinder body fixing bracket 20 is inserted into and coupled to the guide rail 12 of the cylinder support, and the hinge coupling part 22 of the cylinder body fixing bracket 20 and the hinge receiving portion of the cylinder body 41 ( 43) and the hinge 23 is coupled to the cylinder body fixing bracket 20 and the cylinder 40 is combined.

The cylinder is driven to observe the stroke distance of the piston rod, and the piston rod fixing bracket 30 is fixed to the point where the forward and backward points of the piston rod 42 and the window frame meet in the state where the window is completely closed.

Next, the ends of the piston rod fixing bracket 30 and the piston rod 42 are joined by the hinge 33 to complete the coupling of the piston rod fixing bracket 30 and the piston rod 42.

The coupling of the piston rod fixing bracket 30 and the piston rod 42 is completed, the cylinder body 41 and the cylinder body fixing bracket 20 are coupled, and the cylinder body fixing bracket 20 and the cylinder support 10 are After operating the cylinder in the coupled state, the window is completely closed within the stroke distance of the piston rod, and the clamping screw 21 after determining the fixing position of the cylinder body fixing bracket 20 and the cylinder support 10 at the position where the window is fully opened. Tighten) to completely fix the cylinder body fixing bracket 20 and the cylinder support (10).

In case of using pneumatic cylinder, the cylinder has a stroke length of 20mm at the opening and closing of the window, so the pneumatic compression characteristics do not cause any damage even if the piston rod proceeds further in the full opening and closing phase. Opening and closing force can be provided at an appropriate pressure.

As described above, even when the standard of the pneumatic cylinder is appropriately selected, the limit switch is preferably configured to block the pneumatic pressure at the time of full opening and closing, and when the electric cylinder is used, the need for the limit switch is further required.

The limit switch is attached to both sides of the window frame so as to cut off the power or pneumatic state when the window is completely closed, and attach the sensing end 61 in the corresponding position.

Next, the hose fixing clip 300 is fixed to the cylinder body using the cylinder fixing part 310 to store the high pressure hose in order, and the hose is fixed to the hose fixing part 320. In addition, the cylinder body support 400 made of a cushioning member is sandwiched between the rear end of the cylinder body and the cylinder support to support the rear end of the cylinder body.

Next, the cover 50 is inserted into the cover coupling part groove 13a and fixed with the piece 13b to complete the coupling.

In the above described in detail a preferred embodiment of the opening and closing device of the opening window according to the present invention, the present invention is not limited to this and various modifications within the scope of the claims and the detailed description of the invention and the accompanying drawings. Can be carried out, and this also belongs to the scope of the present invention.

1 is a state diagram applying the present invention to a sliding window

Figure 2 is a combined state of the cover removed state in the present invention

3 is an assembly configuration diagram of the present invention

Figure 4 is a cross-sectional view of the combined state of the opening and closing device and the window according to the present invention

Figure 5 is a cross-sectional view of the A-A section of Figure 4 for showing the coupling state of the opening and closing device and the window according to the invention

*. Explanation of the Major Codes

10. Cylinder support

11. Attachment part 12. Cylinder installation part 13. Cover coupling part

20. Cylinder Body Bracket

21. Attachment 22. Hinge coupling 23. Hinge 24. Clamping screw

30. Piston rod fixing bracket

31. Attachment part 32. Hinge coupling part 33. Hinge

34.piece 35.assistance 36.piece

40. Cylinder

41.Body 42.Piston Rod 43.Hinged Base

50. Cover

60. Limit switch 61. Detection stage

Claims (9)

In configuring the opening and closing device of the sliding window, Cylinder support bracket attached to the lower or upper portion of the window frame 100 to support the cylinder, and the cylinder body fixing bracket inserted into the guide rail formed in the left and right length direction of the window frame to the cylinder support 10 to support the cylinder 20, Piston rod fixing bracket 30 is attached to the window frame 200 corresponding to the position where the cylinder support 10 is installed, A cylinder 40 hinged to the cylinder body fixing bracket 20 and a piston rod hinged to the piston rod fixing bracket 30; A cover 50 coupled to the cylinder support such that the cylinder is not exposed while the cylinder is coupled to the cylinder support; It is a configuration including a drive and control means for driving control of the cylinder, The cylinder support 10 includes a planar attachment portion 11 which maintains a contact surface with respect to the left and right full lengths of the window frame, a cylinder mounting portion 12 formed perpendicularly to the attachment portion 11, and the cylinder mounting portion. Consists of a cover engaging portion 13 for fitting the cover continuous in the longitudinal direction at the end, The cylinder mounting portion 12 of the cylinder support 10 can be fixed in position by inserting the cylinder body fixing bracket 20 to move in the longitudinal direction, and fixed by the clamping screw 24 type "24 ┓" Opening and closing device of the sliding window, characterized in that the guide rail (12a) of the configuration. delete The method according to claim 1, Attachment portion (11) of the cylinder support (10) opening and closing device of the sliding window, characterized in that the longitudinally continuous projection end (11a) is formed so as to be caught in the "수평" shape on the inner horizontal surface of the window frame. delete The method according to claim 1, The piston rod fixing bracket 30 includes an attachment portion 31 attached to the window frame, an arc-shaped hinge coupling portion 32 protruding perpendicularly to the attachment portion, and a cylinder 40 on the hinge coupling portion 32. Hinge 33 for engaging the piston rod end of the piston, piece 34 for attaching the attachment portion to the window frame, and the step between the movement axis of the piston rod of the cylinder and the window frame in the state attached to the cylinder support In order to make the attachment portion 31 has a support (35) of the type "더" is further formed in the circular hinge-shaped hinge portion 32 in the state that the support 35 is fixed to the window frame by the piece (34) Planar attachment portion 31 formed integrally with the opening and closing device of the sliding window, characterized in that made of a structure that is fixed to the second piece (36) on the support (35). delete delete delete delete

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