Hot knife pressurization auxiliary roll film cutting device of tissue packaging machine

Abstract

The utility model provides a hot knife pressurization auxiliary cut-off roll film device of a tissue packaging machine, which relates to the technical field of tissue packaging machines and comprises a cut-off mechanism, a processing mechanism is arranged on the cut-off mechanism, and a motor is mounted at the top of a shell. By arranging the processing mechanism, the hot knife pressurization auxiliary roll film cutting device of the tissue packaging machine can have the function of processing roll film melt attached to the hot knife body, namely, when the roll film melt is attached to the surface of the hot knife body, the melt attached and stacked to the surface of the hot knife body can be directly processed, and therefore the roll film can be cut off conveniently. According to the hot knife pressurization auxiliary cutting and rolling film device of the tissue packaging machine, the situation that attached and stacked melt accelerates abrasion of the hot knife body and the service life of the hot knife body is shortened is avoided, the using effect of the hot knife pressurization auxiliary cutting and rolling film device of the tissue packaging machine is improved, and meanwhile the using efficiency of the hot knife pressurization auxiliary cutting and rolling film device of the tissue packaging machine is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tissue paper packaging machines, and particularly relates to a hot knife pressurization-assisted film cutting device for a tissue paper packaging machine. Background Technique

[0002] In order to prevent the tissue paper from being contaminated by dust, bacteria and chemical substances during transportation and storage, tissue paper manufacturers generally use a roll film on the tissue paper packaging machine to package the produced tissue paper. In this packaging process, a key device plays an important role, that is, the hot knife body pressurization-assisted film cutting device on the tissue paper packaging machine.

[0003] When the existing hot knife pressurization-assisted film cutting device of a tissue paper packaging machine is in use, although it can quickly and efficiently cut the roll film, greatly improving the working efficiency of the packaging machine and thus meeting the requirements of high-speed production, it does not have the function of dealing with the molten film adhered to the hot knife body. That is, when the hot knife body pressurization-assisted film cutting device on the tissue paper packaging machine cuts the roll film, a small amount of the roll film will melt under the high temperature of the hot knife body. These molten substances are easily adhered to the surface of the hot knife body, and the adhesion of the molten substances will accelerate the wear of the hot knife body, reducing the service life of the hot knife body, which not only reduces the use effect of the hot knife pressurization-assisted film cutting device of the tissue paper packaging machine, but also reduces the use efficiency of the hot knife pressurization-assisted film cutting device of the tissue paper packaging machine.

[0004] Therefore, it is necessary to propose a hot knife pressurization-assisted film cutting device for a tissue paper packaging machine to solve the above-mentioned technical problems. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problem that the existing hot knife pressurization-assisted film cutting device of a tissue paper packaging machine in the prior art does not have the function of dealing with the molten film adhered to the hot knife body. That is, when the hot knife body pressurization-assisted film cutting device on the tissue paper packaging machine cuts the roll film, a small amount of the roll film will melt under the high temperature of the hot knife body. These molten substances are easily adhered to the surface of the hot knife body, and the adhesion of the molten substances will accelerate the wear of the hot knife body, reducing the service life of the hot knife body, which not only reduces the use effect of the hot knife pressurization-assisted film cutting device of the tissue paper packaging machine, but also reduces the use efficiency of the hot knife pressurization-assisted film cutting device of the tissue paper packaging machine. And a hot knife pressurization-assisted film cutting device for a tissue paper packaging machine is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: A hot knife pressurization-assisted film cutting device for a tissue paper packaging machine, comprising: a cutting mechanism, and a processing mechanism is arranged on the cutting mechanism;

[0007] The processing mechanism includes a rack and a U-shaped frame. The outer surface of the rack is movably sleeved with a housing. A motor is installed on the top of the housing. The output end of the motor is fixedly sleeved with a gear. An L-shaped plate is fixed on the surface of the housing. A scraper is fixed on the surface of the L-shaped plate. A collection box is fixed at the bottom of the scraper. A rectangular block is fixed at the top of the scraper. A first rectangular hole is opened at a position near the bottom on one side of the U-shaped frame. A second rectangular hole is opened on the front surface of the inner wall of the housing.

[0008] Preferably, the gear is movably sleeved inside the second rectangular hole. The teeth of the gear mesh with the teeth of the rack. The inside of the first rectangular hole is communicated with the inside of the U-shaped frame. The rectangular block is adapted to the first rectangular hole. The bottom of the rectangular block is on the same horizontal plane as the bottom of the U-shaped frame.

[0009] Preferably, the cutting mechanism includes a bracket. A servo electric cylinder is installed on the top of the bracket. A controller is installed on one side of the bracket. One end of the telescopic end of the servo electric cylinder is installed with a mounting plate. An electric push rod is installed at the bottom of the mounting plate.

[0010] Preferably, one end of the telescopic end of the electric push rod is installed with a hot knife body. Two symmetrically arranged springs are installed at the bottom of the mounting plate. T-shaped rods are movably sleeved inside both of the two springs.

[0011] Preferably, one end of the telescopic end of the servo electric cylinder movably penetrates through the top of the bracket. The servo electric cylinder is electrically connected to the controller. The electric push rod is electrically connected to the controller.

[0012] Preferably, the hot knife body is electrically connected to the controller. The bottom ends of the two springs are respectively installed on the upper sides of the two T-shaped rods. The top ends of the two T-shaped rods both movably penetrate through the bottom of the mounting plate.

[0013] Preferably, the rack is fixed inside the bracket. The motor is electrically connected to the controller. The top of the U-shaped frame is fixed to the bottom of the mounting plate. The cutting end of the hot knife body is adapted to the first rectangular hole.

[0014] Compared with the prior art, the advantages and positive effects of the present utility model are as follows

[0015] 1. In the present utility model, by providing a processing mechanism, the hot knife pressure-assisted cutting film rolling device of the paper towel packaging machine can be enabled to have the function of processing the film melting substances adhering to the hot knife body. That is, when the hot knife body pressure-assisted cutting film rolling device on the paper towel packaging machine cuts the rolling film and there are film melting substances adhering to the surface of the hot knife body, at this time, the melting substances adhering and accumulating on the surface of the hot knife body can be directly processed, avoiding the situation that the adhering and accumulating melting substances will accelerate the wear of the hot knife body and reduce the service life of the hot knife body. This not only improves the use effect of the hot knife pressure-assisted cutting film rolling device of the paper towel packaging machine, but also improves the use efficiency of the hot knife pressure-assisted cutting film rolling device of the paper towel packaging machine. Through the cooperation of the starting motor, gear and the second rectangular hole, the housing can be made to move on the outer surface of the rack. Through the cooperation of the moving housing, L-shaped plate, scraping plate and rectangular block, the film melting substances at the bottom of the U-shaped frame can be scraped off.

[0016] 2. In the present utility model, by providing a cutting mechanism, the rolling film can be cut. Through the cooperation of the controller, servo electric cylinder and bracket, the mounting plate can be driven to move vertically. Through the cooperation of the controller and the electric push rod, the hot knife body can be driven to move vertically. Description of the Drawings

[0017] Figure 1 is a three-dimensional view of a hot knife pressure-assisted cutting film rolling device of a paper towel packaging machine proposed by the present utility model;

[0018] Figure 2 is a partially sectional three-dimensional view of the processing mechanism of a hot knife pressure-assisted cutting film rolling device of a paper towel packaging machine proposed by the present utility model;

[0019] Figure 3 is a partial three-dimensional view of the processing mechanism of a hot knife pressure-assisted cutting film rolling device of a paper towel packaging machine proposed by the present utility model;

[0020] Figure 4 is a partial three-dimensional view of the cutting mechanism of a hot knife pressure-assisted cutting film rolling device of a paper towel packaging machine proposed by the present utility model;

[0021] Figure 5 is another partial three-dimensional view of the cutting mechanism of a hot knife pressure-assisted cutting film rolling device of a paper towel packaging machine proposed by the present utility model;

[0022] Figure 6 is a three-dimensional structural schematic diagram of the collection box, scraping plate and rectangular block of a hot knife pressure-assisted cutting film rolling device of a paper towel packaging machine proposed by the present utility model.

[0023] Legend: 1. Cutting mechanism; 101. Bracket; 102. Servo electric cylinder; 103. Controller; 104. Mounting plate; 105. Electric push rod; 106. Hot knife body; 107. T-shaped rod; 108. Spring; 2. Processing mechanism; 201. Rack; 202. Housing; 203. Motor; 204. Gear; 205. U-shaped frame; 206. L-shaped plate; 207. Collection box; 208. Scraper; 209. Rectangular block; 210. First rectangular hole; 211. Second rectangular hole. Detailed implementation

[0024] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0025] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed in the following specification.

[0026] As Figures 1-6 shown, the present invention provides a hot knife pressurization-assisted cutting and winding film device for a paper towel packaging machine, including: a cutting mechanism 1, and a processing mechanism 2 is arranged on the cutting mechanism 1;

[0027] The processing mechanism 2 includes a rack 201 and a U-shaped frame 205. The outer surface of the rack 201 is movably sleeved with a housing 202. A motor 203 is installed on the top of the housing 202. The output end of the motor 203 is fixedly sleeved with a gear 204. An L-shaped plate 206 is fixed on the surface of the housing 202. A scraper 208 is fixed on the surface of the L-shaped plate 206. A collection box 207 is fixed at the bottom of the scraper 208. A rectangular block 209 is fixed at the top of the scraper 208. A first rectangular hole 210 is opened at a position near the bottom on one side of the U-shaped frame 205. A second rectangular hole 211 is opened on the front surface of the inner wall of the housing 202. The gear 204 is movably sleeved inside the second rectangular hole 211. The teeth of the gear 204 mesh with the teeth of the rack 201. The inside of the first rectangular hole 210 is communicated with the inside of the U-shaped frame 205. The rectangular block 209 is adapted to the first rectangular hole 210. The bottom of the rectangular block 209 is on the same horizontal plane as the bottom of the U-shaped frame 205. The cutting mechanism 1 includes a bracket 101. A servo electric cylinder 102 is installed on the top of the bracket 101. A controller 103 is installed on one side of the bracket 101. One end of the telescopic end of the servo electric cylinder 102 is installed with a mounting plate 104. An electric push rod 105 is installed at the bottom of the mounting plate 104. One end of the telescopic end of the electric push rod 105 is installed with a hot knife body 106. Two symmetrically arranged springs 108 are installed at the bottom of the mounting plate 104. A T-shaped rod 107 is movably sleeved inside each of the two springs 108. One end of the telescopic end of the servo electric cylinder 102 movably penetrates through the top of the bracket 101. The servo electric cylinder 102 is electrically connected to the controller 103. The electric push rod 105 is electrically connected to the controller 103. The hot knife body 106 is electrically connected to the controller 103. The bottom ends of the two springs 108 are respectively installed with the upper sides of the two T-shaped rods 107. The top ends of the two T-shaped rods 107 both movably penetrate through the bottom of the mounting plate 104. The rack 201 is fixed inside the bracket 101. The motor 203 is electrically connected to the controller 103. The top of the U-shaped frame 205 is fixed to the bottom of the mounting plate 104. The cutting end of the hot knife body 106 is adapted to the first rectangular hole 210.

[0028] The achieved effect is that when the roll film needs to be cut, first install the bracket 101 at a suitable position on the workbench, then connect the controller 103 to an external power supply. Next, use the controller 103 to start the hot knife body 106 and set the heating temperature of the hot knife body 106. After that, move the roll film to be cut on the workbench to directly below the U-shaped frame 205 and adjust the position of the roll film so that the cutting position required by the roll film is exactly directly below the first rectangular hole 210. When the heating temperature of the hot knife body 106 reaches, first use the controller 103 to start the electric push rod 105. At this time, the started electric push rod 105 will drive the heated hot knife body 106 to move vertically downward. When the hot knife body 106 can no longer move, the cutting end of the hot knife body 106 just passes through the inside of the first rectangular hole 210. At the same time, use the controller 103 to first turn off the electric push rod 105 and then start the servo electric cylinder 102. At this time, the turned-off electric push rod 105 will make the hot knife body 106 stop moving. At this time, the started servo electric cylinder 102 will drive the mounting plate 104 to move vertically downward, and the vertically moving mounting plate 104 will drive the electric push rod 105, the U-shaped frame 205 and the two springs 108 to move vertically downward together. At the same time, the two vertically moving springs 108 will drive the corresponding T-shaped rods 107 to move vertically downward. The moving electric push rod 105 will drive the hot knife body 106 to move vertically downward. When the bottoms of the two T-shaped rods 107 both contact the top of the roll film, at this time, the two springs 108 will undergo elastic deformation under the cooperation of the corresponding T-shaped rods 107 and the continuously moving mounting plate 104. The two elastically deformed springs 108 will, under the cooperation of the continuously moving mounting plate 104 and the corresponding T-shaped rods 107, respectively apply a downward pressure to the two T-shaped rods 107. At this time, the two T-shaped rods 107 will press the roll film placed on the workbench. At the same time, the vertically moving hot knife body 106 will cut the roll film. When the roll film is completely cut, a small amount of melted roll film material will adhere to the surface of the hot knife body 106. Then use the controller 103 to make the telescopic end of the servo electric cylinder 102 move vertically upward. At this time, the servo electric cylinder 102 will drive the mounting plate 104 to move vertically upward, and the moving mounting plate 104 will drive the tops of the two springs 108, the U-shaped frame 205 and the electric push rod 105 to move vertically upward together. At the same time, the moving electric push rod 105 will drive the hot knife body 106 to move vertically upward. When the two springs 108 are both elastically restored, at this time, the two springs 108 will drive the corresponding T-shaped rods 107 to move vertically upward. When all the above components are reset to their original positions, then use the controller 103 to turn off the servo electric cylinder 102, and then operate according to the above operation steps to cut the remaining roll film. When it is necessary to remove the melted material on the surface of the hot knife body 106, directly use the controller 103 to start the electric push rod 105,At this time, the activated electric push rod 105 will drive the hot knife body 106 to move vertically upward, and the cutting end of the vertically moving hot knife body 106 will pass through the inside of the first rectangular hole 210 again. At this time, the first rectangular hole 210 will scrape off the melted substances attached to the surface of the hot knife body 106. When the hot knife body 106 can no longer move, at this time, use the controller 103 to first turn off the hot knife body 106 and the electric push rod 105, and then start the motor 203. The activated motor 203 will drive the gear 204 to rotate forward. The rotating gear 204, in cooperation with the rack 201 and the second rectangular hole 211, will cause the motor 203 and the housing 202 to move horizontally on the outer surface of the rack 201. At this time, the moving housing 202, in cooperation with the L-shaped plate 206, will drive the scraper 208 to move horizontally. The moving scraper 208 will drive the rectangular block 209 and the collection box 207 to move horizontally together. At this time, the moving rectangular block 209 will move into the inside of the first rectangular hole 210. At the same time, the moving scraper 208, in cooperation with the moving rectangular block 209, will scrape off the melted film of the cooled roll film at the bottom of the U-shaped frame 205. The scraped-off melted film of the roll film will directly fall into the inside of the collection box 207. When the melted film of the roll film at the bottom of the U-shaped frame 205 is completely scraped off, at this time, use the controller 103 to make the motor 203 drive the gear 204 to rotate in reverse. At this time, the reverse-rotating gear 204 will cause the above-mentioned components to move back to their original positions. When the above-mentioned components return to their original positions, directly use the controller 103 to turn off the motor 203.,

[0029] Working principle: When the winding film needs to be cut, first install the bracket 101 at a suitable position on the workbench, then connect the controller 103 to an external power supply, then use the controller 103 to start the hot knife body 106 and set the heating temperature of the hot knife body 106. After that, move the winding film to be cut on the workbench to directly below the U-shaped frame 205 and adjust the position of the winding film so that the cutting position required by the winding film is completely directly below the first rectangular hole 210. When the heating temperature of the hot knife body 106 reaches, first use the controller 103 to start the electric push rod 105. At this time, the started electric push rod 105 will drive the heated hot knife body 106 to move vertically downward. When the hot knife body 106 can no longer move, the cutting end of the hot knife body 106 just passes through the inside of the first rectangular hole 210. At the same time, use the controller 103 to first turn off the electric push rod 105 and then start the servo electric cylinder 102. At this time, the turned-off electric push rod 105 will make the hot knife body 106 stop moving. At this time, the started servo electric cylinder 102 will drive the mounting plate 104 to move vertically downward, and the vertically moving mounting plate 104 will drive the electric push rod 105, the U-shaped frame 205 and the two springs 108 to move vertically downward together. At the same time, the two vertically moving springs 108 will drive the corresponding T-shaped rods 107 to move vertically downward. The moving electric push rod 105 will drive the hot knife body 106 to move vertically downward. When the bottoms of the two T-shaped rods 107 both contact the top of the winding film, at this time, the two springs 108 will undergo elastic deformation under the cooperation of the corresponding T-shaped rods 107 and the continuously moving mounting plate 104. The two elastically deformed springs 108 will apply a downward pressure to the two T-shaped rods 107 respectively under the cooperation of the continuously moving mounting plate 104 and the corresponding T-shaped rods 107. At this time, the two T-shaped rods 107 will press the winding film placed on the workbench. At the same time, the vertically moving hot knife body 106 will cut the winding film. When the winding film is completely cut, a small amount of melted winding film will adhere to the surface of the hot knife body 106. Then use the controller 103 to make the telescopic end of the servo electric cylinder 102 move vertically upward. At this time, the servo electric cylinder 102 will drive the mounting plate 104 to move vertically upward, and the moving mounting plate 104 will drive the tops of the two springs 108, the U-shaped frame 205 and the electric push rod 105 to move vertically upward together. At the same time, the moving electric push rod 105 will drive the hot knife body 106 to move vertically upward. When the two springs 108 are elastically restored, at this time, the two springs 108 will drive the corresponding T-shaped rods 107 to move vertically upward. When all the above components are reset to their original positions, then use the controller 103 to turn off the servo electric cylinder 102, and then operate according to the above operation steps to cut the remaining winding film. When it is necessary to remove the melted material on the surface of the hot knife body 106, directly use the controller 103 to start the electric push rod 105,At this time, the activated electric push rod 105 will drive the hot knife body 106 to move vertically upward, and the cutting end of the vertically moving hot knife body 106 will pass through the inside of the first rectangular hole 210 again. At this time, the first rectangular hole 210 will scrape off the melted matter adhering to the surface of the hot knife body 106. When the hot knife body 106 can no longer move, at this time, use the controller 103 to first turn off the hot knife body 106 and the electric push rod 105, and then start the motor 203. The activated motor 203 will drive the gear 204 to rotate forward. The rotating gear 204 will, under the cooperation of the rack 201 and the second rectangular hole 211, cause the motor 203 and the housing 202 to move horizontally on the outer surface of the rack 201. At this time, the moving housing 202 will, under the cooperation of the L-shaped plate 206, drive the scraper 208 to move horizontally. The moving scraper 208 will drive the rectangular block 209 and the collection box 207 to move horizontally together. At this time, the moving rectangular block 209 will move into the inside of the first rectangular hole 210. At the same time, the moving scraper 208 will, under the cooperation of the moving rectangular block 209, scrape off the melted matter of the cooled roll film at the bottom of the U-shaped frame 205. The scraped-off roll film melted matter will directly fall into the inside of the collection box 207. When the melted matter of the roll film at the bottom of the U-shaped frame 205 is completely scraped off, at this time, use the controller 103 to make the motor 203 drive the gear 204 to rotate in reverse. At this time, the reverse rotating gear 204 will cause the above-mentioned various components to move back to their original positions. When the above-mentioned various components return to their original positions, directly use the controller 103 to turn off the motor 203.

[0030] Among them, the hot knife body 106 generally includes main components such as a heating element, a knife body, a temperature sensor, and an insulating mounting component. Its working principle is: when the controller 103 starts the hot knife body 106, at this time, the heating element starts to generate heat, transfers the heat to the knife body, the temperature of the knife body gradually rises, reaches the set cutting temperature. During the operation of the tissue packaging machine, when the cutting end of the hot knife body 106 touches the roll film, at this time, the high temperature of the hot knife body 106 makes the roll film quickly soften or even melt. At the same time, the sharp edge of the knife body cuts off the roll film under the action of pressure. The temperature sensor monitors the temperature of the hot knife body 106 in real time and feeds the temperature signal back to the controller 103. The controller 103 adjusts the power of the heating element according to the feedback information of the temperature sensor to maintain the temperature stability of the hot knife body 106. In this way, the hot knife body 106 can efficiently and accurately cut off the roll film during the continuous packaging production process, realizing the packaging of tissues.

[0031] The controller 103 (PLC controller), servo electric cylinder 102, electric push rod 105, hot knife body 106, and motor 203 in the present utility model are all prior arts, and their working principles are all publicly known technologies. Their models can be selected according to actual situations and will not be explained in detail here.

[0032] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution content of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A hot knife pressurization-assisted cutting device for a paper towel packaging machine, characterized in that, Including: A cutting mechanism (1), on which a processing mechanism (2) is provided; The processing mechanism (2) includes a rack (201) and a U-shaped frame (205). The outer surface of the rack (201) is movably sleeved with a housing (202). A motor (203) is installed on the top of the housing (202). The output end of the motor (203) is fixedly sleeved with a gear (204). An L-shaped plate (206) is fixed on the surface of the housing (202). A scraper (208) is fixed on the surface of the L-shaped plate (206). A collection box (207) is fixed at the bottom of the scraper (208). A rectangular block (209) is fixed at the top of the scraper (208). A first rectangular hole (210) is opened at a position near the bottom on one side of the U-shaped frame (205). A second rectangular hole (211) is opened on the front surface of the inner wall of the housing (202).

2. The hot knife pressure-assisted cutting and winding film device of the paper towel packaging machine according to claim 1, wherein: The gear (204) is movably sleeved inside the second rectangular hole (211). The teeth of the gear (204) are meshed with the teeth of the rack (201). The inside of the first rectangular hole (210) is communicated with the inside of the U-shaped frame (205). The rectangular block (209) is adapted to the first rectangular hole (210). The bottom of the rectangular block (209) is on the same horizontal plane as the bottom of the U-shaped frame (205).

3. The hot knife pressure-assisted cutting film rolling device of the paper towel packaging machine according to claim 1, characterized in that: The cutting mechanism (1) includes a bracket (101). A servo electric cylinder (102) is installed on the top of the bracket (101). A controller (103) is installed on one side of the bracket (101). One end of the telescopic end of the servo electric cylinder (102) is installed with a mounting plate (104). An electric push rod (105) is installed at the bottom of the mounting plate (104).

4. The hot knife pressure-assisted cutting and winding film device of the paper towel packaging machine according to claim 3, wherein: One end of the telescopic end of the electric push rod (105) is installed with a hot knife body (106). Two symmetric springs (108) are installed at the bottom of the mounting plate (104). A T-shaped rod (107) is movably sleeved inside each of the two springs (108).

5. The hot knife pressure-assisted cutting and winding film device of the paper towel packaging machine according to claim 3, characterized in that: One end of the telescopic end of the servo electric cylinder (102) movably penetrates through the top of the bracket (101). The servo electric cylinder (102) is electrically connected to the controller (103). The electric push rod (105) is electrically connected to the controller (103).

6. The hot knife pressure-assisted cutting film rolling device of the paper towel packaging machine according to claim 4, characterized in that: The hot knife body (106) is electrically connected to the controller (103). The bottom ends of the two springs (108) are respectively installed on the upper sides of the two T-shaped rods (107). The top ends of the two T-shaped rods (107) both movably penetrate through the bottom of the mounting plate (104).

7. The hot knife pressure-assisted cutting and winding film device of the paper towel packaging machine according to claim 4, characterized in that: The rack (201) is fixed inside the bracket (101). The motor (203) is electrically connected to the controller (103). The top of the U-shaped frame (205) is fixed to the bottom of the mounting plate (104). The cutting end of the hot knife body (106) is adapted to the first rectangular hole (210).

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