A spraying trolley and a powder spraying mechanism

Abstract

The utility model relates to digital printing machine technical field discloses a kind of spraying trolley and powder spraying mechanism, powder spraying mechanism includes main part and drive assembly, at least one mounting position is equipped on the main part, each mounting position is equipped with matched powder storage tank and powder outlet pipe, the inside of powder outlet pipe is communicated with negative pressure component, one end of powder storage tank is equipped with the powder outlet port being communicated with the powder outlet pipe, the inside of powder storage tank is equipped with agitator corresponding the powder outlet port, rotating assembly is equipped on the agitator, drive assembly is located in the outer wall of main part, and is connected powder storage tank, for driving rotating assembly drives the agitator in the powder storage tank inside flash powder is stirred, to make flash powder flow into the powder outlet pipe by the powder outlet port, and under the action of negative pressure component, it is sprayed out. Adopt the powder spraying mechanism of the application to spray powder, and powder spraying effect is uniform, guarantee the powder spraying effect, to guarantee product quality.

Description

Technical Field

[0001] This utility model relates to the field of digital printing machine technology, and in particular to a printing carriage and a powder spraying mechanism. Background Technology

[0002] In digital printing processes, powder spraying is often combined to improve the appearance of products. However, existing powder spraying systems often produce poor powder spraying results, affecting the final quality of the products. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a printing carriage and a powder spraying mechanism to improve the powder spraying effect and ensure product quality.

[0004] The technical solution adopted by this utility model to solve its technical problem is: A powder spraying mechanism for a digital printing machine includes a main body and a drive assembly. The main body has at least one mounting position, and each mounting position has a matching powder storage tank and a powder outlet pipe. The powder outlet pipe is internally connected to a negative pressure assembly. One end of the powder storage tank has a powder outlet connected to the powder outlet pipe. The inside of the powder storage tank, corresponding to the powder outlet, has a stirring element. The stirring element has a rotating assembly. The drive assembly is located on the outer wall of the main body and connected to the powder storage tank. It drives the rotating assembly to drive the stirring element to stir the glitter powder in the powder storage tank, so that the glitter powder flows into the powder outlet pipe through the powder outlet and is sprayed out under the action of the negative pressure assembly.

[0005] Preferably, the main body includes a housing, the upper end of which is provided with a sleeve, the powder storage tank is detachably inserted into the sleeve, the powder outlet pipe is disposed in the housing and communicates with the sleeve, and the drive assembly is disposed on the sleeve.

[0006] Preferably, the bottom wall of the housing is provided with a powder spraying hole and a powder suction hole, the powder spraying hole is connected to the powder outlet pipe, and the top of the housing is provided with a suction connector connected to the powder suction hole.

[0007] Preferably, the outer wall of the sleeve is provided with a mounting base and a snap-fit ​​base. The drive assembly includes a connecting rod, one end of which is hinged to the mounting base, and the other end of which is connected to the snap-fit ​​base via an elastic element. A snap-fit ​​rod is provided in the middle of the connecting rod. The upper end of the snap-fit ​​rod is connected to the powder storage tank, and the lower end of the snap-fit ​​rod is provided with a drive motor. The drive motor is connected to the rotating assembly.

[0008] Preferably, the rotating assembly includes a rotating shaft rotatably inserted into the powder storage tank, the upper end of the rotating shaft being connected to the stirring component, the lower end of the rotating shaft being provided with a passive component, and the drive motor being provided with an active component, the active component being connected to the passive component.

[0009] Preferably, the upper end of the snap-fit ​​rod is provided with a buckle, the powder storage tank includes a tank body and a cover body connected together, a slot is formed between the tank body and the cover body, and the buckle is embedded in the slot.

[0010] Preferably, the negative pressure assembly includes an air blowing needle, which includes an air blowing end and a connecting end. The main body is provided with an air blowing connector for connecting to an air source. The connecting end is connected to the air blowing connector. The outer wall of the air blowing end is provided with an air blowing hole. The air blowing end penetrates the outer wall of the powder outlet pipe and the air blowing hole is located inside the powder outlet pipe. When the air blowing hole blows air away from the powder storage tank, a negative pressure is formed between the air blowing needle and the powder outlet.

[0011] Preferably, the main body is provided with a micro switch, which is electrically connected to the drive assembly.

[0012] A printing carriage, slidably connected to the crossbeam of a printing machine, includes a carriage body, a printing mechanism, and the aforementioned powder spraying mechanism. Both the powder spraying mechanism and the printing mechanism are located inside the carriage body, with the printing mechanism located at the center of the bottom end of the carriage body and the powder spraying mechanism located on both sides of the printing mechanism. A UV curing mechanism is also provided inside the carriage body corresponding to the printing mechanism.

[0013] Preferably, the interior of the trolley body is provided with a mounting rod, the mounting rod is provided with a connecting hole, the outer wall of the main body is provided with an adjusting block, the adjusting block is provided with an oblong adjusting hole extending along its length direction, and the adjusting hole is connected to the connecting hole.

[0014] This utility model discloses a printing carriage and powder spraying mechanism. Compared with the prior art, its advantages are as follows: A powder storage tank and a powder outlet pipe are installed on the mounting position of the main body. The powder outlet pipe is internally connected to a negative pressure component. One end of the powder storage tank has a powder outlet connected to the powder outlet pipe. A stirring component is installed inside the powder storage tank corresponding to the powder outlet. A rotating component is connected to the stirring component. Simultaneously, a driving component is installed on the outer wall of the main body to drive the rotating component to rotate. During powder spraying, the glitter in the powder storage tank is stirred by the rotating component under the action of the driving component, causing the glitter to flow into the powder outlet pipe through the powder outlet and be sprayed out from the bottom of the powder outlet pipe under the action of the negative pressure component. This achieves uniform powder spraying, ensuring the powder spraying effect and thus guaranteeing product quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the powder spraying mechanism of this utility model, which includes two powder storage tanks.

[0016] Figure 2 for Figure 1 Exploded view.

[0017] Figure 3 for Figure 1 A sectional view.

[0018] Figure 4 This is a schematic diagram of the printing carriage of this utility model.

[0019] Figure 5 This is a schematic diagram of the powder spraying mechanism of this utility model, which includes a powder storage tank.

[0020] Wherein: 1-Main body, 11-Shell, 12-Sleeve, 13-Powder spraying hole, 14-Powder suction hole, 15-Mounting base, 16-Snap-fit ​​base, 17-Suction connector; 18-Adjusting block, 19-Adjusting hole; 2-Drive assembly, 21-Connecting rod, 22-Elastic element, 23-Snap-fit ​​rod, 24-Drive motor, 25-Drive gear, 26-Snap fastener; 3-Powder storage tank, 31-Powder outlet, 32-Card slot, 33-Tank body, 34-Lid; 4-Powder outlet pipe; 5-Negative pressure assembly, 51-Blowing needle, 52-Blowing connector; 6-Agitator; 7-Rotating assembly, 71-Shaft, 72-Driven gear; 8-Micro switch; 100 - Cart body, 101 - Mounting rod, 200 - Printing mechanism, 300 - Powder spraying mechanism, 400 - UV curing mechanism. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0022] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] like Figure 1-4 As shown, a preferred embodiment of the present invention provides a printing carriage that can slide laterally (X-axis) onto the crossbeam of a printing machine, such as by using a linear motor. The crossbeam is longitudinally (Y-axis) mounted on the frame of the digital printing machine; this is prior art and will not be described further here.

[0025] The printing carriage includes a carriage body 100. The carriage body 100 is provided with a powder spraying mechanism 300 and a printing mechanism 200 inside. The printing mechanism 200 is located at the middle of the bottom end of the carriage body 100, and the powder spraying mechanism 300 is located on both sides of the printing mechanism 200. The carriage body 100 is also provided with a UV curing mechanism 400 corresponding to the printing mechanism 200 inside.

[0026] The rear side wall of the trolley body 100 is provided with a slider, and the crossbeam is provided with a slide rail that cooperates with the slider. At the same time, the slider is connected to a driving mechanism, such as a lead screw or a linear motor, to drive the slider to move along the slide rail in the X-axis direction. Meanwhile, the crossbeam can also move in the Y-axis direction, so that different effect patterns can be printed as needed during the printing process.

[0027] In addition, the carriage body 100 is equipped with an electrostatic eliminator to eliminate static electricity, preventing static electricity from affecting the ink and powder, thereby ensuring printing effect and quality. Simultaneously, an anti-collision mechanism, such as a photoelectric sensor, can be installed on the carriage body 100 to prevent collisions during movement.

[0028] The printing mechanism 200 is used for printing and is an existing structure, which will not be described in detail here. However, its printhead is equipped with a printhead adjustment mechanism. The main adjustment components include an Allen screw, an adjustment bracket, a printhead fixing frame, a No. 1 steel ball, a No. 2 steel ball, and a ball plunger. When adjusting the printhead, the Allen screw needs to be turned down to press or release the No. 1 steel ball (the bottom of the No. 1 steel ball has a spring). At this time, the No. 2 steel ball will press against or release the printhead. Then, the steel ball of the ball plunger, which adjusts the direction, will cause the printhead to move slightly left, right, forward, and backward, thus achieving the effect of adjusting and fixing the printhead.

[0029] The carriage body 100 is made of carbon fiber. Existing digital printing machine carriage bodies are assembled from aluminum plates, steel plates, sheet metal, and other metal materials, which not only results in high weight (most exceeding 50KG) but also introduces assembly precision errors. Due to the high weight and large inertia, the guide rails, sliders, and drive devices experience significant wear, leading to slow printing speeds, poor precision, and a rapid decrease in printing precision over time. This multi-functional digital printing machine carriage body 100 is primarily composed of carbon fiber. The internal body of the carriage body 100 is integrally molded from carbon fiber, as is the upper part of the carriage with a carbon fiber cover. The outer shell of the carriage body 100 is also integrally molded from carbon fiber. Compared to existing digital printing machine carriage bodies, our all-carbon fiber integral carriage body weighs less than 5KG, features ultra-high precision molding, and eliminates assembly precision errors. Its weight is approximately 1 / 10 of that of traditional metal carriage bodies, resulting in extremely low motion inertia and less wear on the guide rails, sliders, and drive devices, ultimately achieving high-speed, high-precision inkjet printing.

[0030] The powder spraying mechanism 300 includes a main body 1 and a drive assembly 2. The main body 1 is connected to the trolley body 100. The main body 1 has at least one mounting position, and each mounting position is equipped with a matching powder storage tank 3 and a powder outlet pipe 4, thus allowing multiple powder storage tanks 3 to be installed simultaneously (e.g., ...). Figure 1-3 It contains two of the aforementioned powder storage tanks 3. Figure 5 The container contains only one powder storage tank 3, and each powder storage tank 3 contains different glitter powders. During operation, powder can be sprayed from one powder storage tank 3 or from two or more powder storage tanks 3, thereby obtaining different powder spraying effects and improving the product effect.

[0031] To ensure the smooth discharge of glitter from the powder storage tank 3, a negative pressure component 5 is connected internally to the powder outlet pipe 4. One end of the powder storage tank 3 has a powder outlet 31 connected to the powder outlet pipe 4. Inside the powder storage tank 3, corresponding to the powder outlet 31, is a stirring element 6. A rotating component 7 is mounted on the stirring element 6. A driving component 2 is located on the outer wall of the main body 1 and connected to the powder storage tank 3. This driving component 2 drives the rotating component 7 to stir the stirring element 6, causing the glitter to flow through the powder outlet 31 into the powder outlet pipe 4 and be sprayed out under the action of the negative pressure component 5. The stirring element 6 is a brush or a flexible scraper, such as a silicone scraper or a rubber scraper.

[0032] Based on the above-mentioned technical features, the inkjet printing carriage has a matching powder storage tank 3 and a powder outlet pipe 4 installed at the mounting position of the main body 1. The powder outlet pipe 4 is internally connected to a negative pressure component 5. One end of the powder storage tank 3 is provided with a powder outlet 31 connected to the powder outlet pipe 4. Inside the powder storage tank 3, corresponding to the powder outlet 31, a stirring component 6 is provided. A rotating component 7 is connected to the stirring component 6. At the same time, a driving component 2 is provided on the outer wall of the main body 1 to drive the rotating component 7 to rotate. During powder spraying, the glitter in the powder storage tank 3 is driven by the driving component 2, which drives the rotating component 7 to drive the stirring component 6 to stir the glitter in the powder storage tank 3. This causes the glitter to flow into the powder outlet pipe 4 through the powder outlet 31 and be sprayed out from the bottom of the powder outlet pipe 4 under the action of the negative pressure component 5. This achieves uniform powder spraying, ensures the powder spraying effect, and thus guarantees product quality.

[0033] Generally, the powder spraying carriage is mounted on the crossbeam of the digital printing machine and can move along the X-axis, while the crossbeam can move along the Y-axis. The powder spraying carriage contains a printing mechanism that sprays colored ink to form colored patterns. During the printing process, printing can be performed before powder spraying, or vice versa, depending on the specific process. Since the printing mechanism moves along the X-axis with the printing carriage, switching between different processes can be achieved simply by changing the relative distance between the powder spraying mechanism and the printing mechanism along the Y-axis.

[0034] In this embodiment, the interior of the trolley body 100 is provided with a mounting rod 101, which has a connecting hole. The outer wall of the main body 1 is provided with an adjusting block 18, which has an oblong adjusting hole 19 extending along its length direction. The adjusting hole 19 is connected to the connecting hole. Thus, the main body 1 can be adjusted in the Y-axis direction through the adjusting hole 19, allowing the powder spraying sequence to be changed according to the actual printing process, thereby achieving the switching of different processes.

[0035] Alternatively, a handle can be provided at one end of the main body 1, slide rails can be provided on both sides of the main body 1, and a slide groove can be provided inside the trolley body 100. The slide rails cooperate with the slide grooves, and the powder spraying mechanism 300 can be driven to move back and forth through the handle. Alternatively, other driving methods such as motor lead screws can be used for back and forth movement.

[0036] In this embodiment, the main body 1 includes a housing 11, and a sleeve 12 is provided at the upper end of the housing 11 at the mounting position. The powder storage tank 3 is detachably inserted into the sleeve. The powder outlet pipe 4 is located inside the housing 11 and communicates with the sleeve 12. The drive assembly 2 is located on the sleeve 12.

[0037] Specifically, the bottom wall of the housing 11 is provided with a powder spraying hole 13 and a powder suction hole 14. The powder suction hole 14 is located on both sides of the powder spraying hole 13. The powder spraying hole 13 is connected to the powder outlet pipe 4. The top of the housing 11 is provided with a suction connector 17 connected to the powder suction hole 14. The suction connector 17 is used to connect a suction device. During the powder spraying process, excess floating powder will remain in the air around the product. If it is not removed in time, it may partially adhere to the product, affecting the product quality. This application sets a suction connector 17 to connect to a suction device. After the glitter is sprayed, the suction device removes the sprayed excess glitter through the powder suction hole 14, thereby achieving the function of removing excess floating powder, avoiding floating powder adhering to the product, and ensuring product quality.

[0038] In this embodiment, the outer wall of the sleeve 12 is provided with a mounting base 15 and a snap-fit ​​base 16. The drive assembly 2 includes a connecting rod 21, one end of which is hinged to the mounting base 15, and the other end of which is connected to the snap-fit ​​base 16 via an elastic element 22 (preferably a spring). A snap-fit ​​rod 23 is provided in the middle of the connecting rod 21. The upper end of the snap-fit ​​rod 23 is connected to the powder storage tank 3, and the lower end of the snap-fit ​​rod 23 is provided with a drive motor 24. The drive motor 24 is connected to the rotating assembly 7. The rotating assembly 7 includes a rotating shaft 71 rotatably inserted into the powder storage tank 3. The upper end of the rotating shaft 71 is connected to the stirring element 6, and the lower end of the rotating shaft 71 is provided with a passive element. An active element is provided on the drive motor 24, and the active element is connected to the passive element. The driving component is a driving gear 25, and the driven component is a driven gear 72. The driving gear 25 and the driven gear 72 mesh with each other. During operation, the drive motor 24 rotates, driving the driving gear 25 to drive the driven gear 72 to rotate. The driven gear 72 drives the rotating shaft 71 to drive the stirring component 6, thereby stirring the flash powder in the powder storage tank 3. Simultaneously, to facilitate control of the drive motor 24, a micro switch 8 is provided on the main body 1, and the micro switch 8 is electrically connected to the drive motor 24.

[0039] Alternatively, the active component can be an active friction wheel, and the passive component can be a driven friction wheel; or the active component and the passive component can be connected by a coupling, which is inserted into the coupling when the powder storage tank 3 is inserted downwards, and the drive motor 24 can drive the stirring component to rotate through the coupling; or the active component can be an active pulley, and the passive component can be a driven pulley, with the active pulley and the driven pulley connected by a belt; or the active component can be an active sprocket, and the passive component can be a driven sprocket, with the active sprocket and the driven sprocket connected by a chain.

[0040] The upper end of the latching rod 23 is provided with a buckle 26. The powder storage tank 3 includes a tank body 33 and a cover 34 connected together. A groove 32 is formed between the tank body 33 and the cover 34, and the buckle 26 is embedded in the groove 32. That is, when the powder storage tank 3 is installed on the sleeve 12, the buckle 26 is engaged with the groove 32, so that the powder storage tank 3 will not shake during operation, improving the powder spraying stability and effect. The tank body 33 and the cover 34 can be detachably connected or integrated. However, for easy replacement, the tank body 33, the cover 34, and the rotating component 7 can be integrated into one unit for single use. When changing to different glitter, only the powder storage tank 3 containing the different glitter needs to be replaced, which makes glitter replacement quick and convenient.

[0041] During the specific replacement process, since the drive motor 24 is fixedly mounted on the snap-fit ​​rod 23, when the powder storage tank 3 is being installed and inserted downwards against the snap 26, the snap-fit ​​rod 23 will swing hingedly through the connecting rod 21. The drive motor 24 and the drive gear 25 will move away from the powder storage tank 3, so that the driven gear 72 can be inserted smoothly. When fully inserted, the snap-fit ​​rod 23 returns to its original position due to the pull of the spring, so that the snap 26 engages with the slot 32, and at the same time, the drive gear 25 and the driven gear 72 mesh.

[0042] In this embodiment, the negative pressure component 5 includes an air blowing needle 51, which includes an air blowing end and a connecting end. The housing 11 is provided with an air blowing connector 52 for connecting to an air source. The connecting end is connected to the air blowing connector 52. The outer wall of the air blowing end is provided with an air blowing hole. The air blowing end penetrates the outer wall of the powder outlet pipe 4 and the air blowing hole is located inside the powder outlet pipe 4. When the air blowing hole blows air away from the powder storage tank 3, a negative pressure is formed between the air blowing needle 51 and the powder outlet 31. At this time, the glitter will have a downward suction force. The negative pressure will suck down the glitter, and then the glitter will be sprayed out through the powder outlet pipe 4 with the airflow from the air blowing hole to complete the powder spraying. Then, the suction component will suck away the excess floating powder through the suction hole 14 and filter it out through the filter box on the printing carriage.

[0043] For ease of description, a powder spraying mechanism 300 containing two powder storage tanks 3 is defined as a first powder spraying mechanism, and a powder spraying mechanism 300 containing only one powder storage tank 3 is defined as a second powder spraying mechanism. In actual use, one first powder spraying mechanism can be provided on each side of the printing mechanism 200; alternatively, two or more second powder spraying mechanisms can be provided on each side. In this case, each powder spraying mechanism is independent and can be adjusted independently, which is more convenient to use than having the two powder storage tanks fixed together.

[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A powder spraying mechanism for a digital printing machine, characterized in that: The device includes a main body and a drive assembly. The main body has at least one mounting position, and each mounting position has a matching powder storage tank and a powder outlet pipe. The powder outlet pipe is internally connected to a negative pressure assembly. One end of the powder storage tank has a powder outlet connected to the powder outlet pipe. The inside of the powder storage tank is equipped with a stirring element corresponding to the powder outlet. The stirring element has a rotating assembly. The drive assembly is located on the outer wall of the main body and connected to the powder storage tank. It is used to drive the rotating assembly to drive the stirring element to stir the glitter in the powder storage tank, so that the glitter flows into the powder outlet pipe through the powder outlet and is sprayed out under the action of the negative pressure assembly.

2. The powder spraying mechanism as described in claim 1, characterized in that: The main body includes a housing, with a sleeve at the upper end of the housing. The powder storage tank is detachably inserted into the sleeve. The powder outlet pipe is located inside the housing and communicates with the sleeve. The drive assembly is located on the sleeve.

3. The powder spraying mechanism as described in claim 2, characterized in that: The bottom wall of the housing is provided with a powder spraying hole and a powder suction hole. The powder spraying hole is connected to the powder outlet pipe. The top of the housing is provided with a suction connector that is connected to the powder suction hole.

4. The powder spraying mechanism as described in claim 2, characterized in that: The outer wall of the sleeve is provided with a mounting base and a snap-fit ​​base. The drive assembly includes a connecting rod. One end of the connecting rod is hinged to the mounting base, and the other end of the connecting rod is connected to the snap-fit ​​base through an elastic element. A snap-fit ​​rod is provided in the middle of the connecting rod. The upper end of the snap-fit ​​rod is connected to the powder storage tank, and the lower end of the snap-fit ​​rod is provided with a drive motor. The drive motor is connected to the rotating assembly.

5. The powder spraying mechanism as described in claim 4, characterized in that: The rotating assembly includes a rotating shaft rotatably inserted into the powder storage tank. The upper end of the rotating shaft is connected to the stirring component, and the lower end of the rotating shaft is provided with a passive component. The drive motor is provided with an active component, and the active component is connected to the passive component.

6. The powder spraying mechanism as described in claim 4, characterized in that: The upper end of the snap-fit ​​rod is provided with a buckle. The powder storage tank includes a tank body and a cover body connected together. A slot is formed between the tank body and the cover body, and the buckle is embedded in the slot.

7. The powder spraying mechanism as described in any one of claims 1-6, characterized in that: The negative pressure component includes an air blowing needle, which includes an air blowing end and a connecting end. The main body is provided with an air blowing connector for connecting to an air source. The connecting end is connected to the air blowing connector. The outer wall of the air blowing end is provided with an air blowing hole. The air blowing end penetrates the outer wall of the powder outlet pipe and the air blowing hole is located inside the powder outlet pipe. When the air blowing hole blows air away from the powder storage tank, a negative pressure is formed between the air blowing needle and the powder outlet.

8. The powder spraying mechanism as described in any one of claims 1-6, characterized in that: The main body is equipped with a micro switch, which is electrically connected to the drive assembly.

9. A printing carriage, slidably connected to the crossbeam of a printing machine, characterized in that: The device includes a carriage body, a printing mechanism, and a powder spraying mechanism as described in any one of claims 1-8. Both the powder spraying mechanism and the printing mechanism are disposed inside the carriage body, with the printing mechanism disposed at the middle of the bottom end of the carriage body and the powder spraying mechanism disposed on both sides of the printing mechanism. A UV curing mechanism is also provided inside the carriage body corresponding to the printing mechanism.

10. The printing carriage as described in claim 9, characterized in that: The main body of the trolley is provided with an installation rod inside, and the installation rod is provided with a connecting hole. The outer wall of the main body is provided with an adjustment block, and the adjustment block is provided with an oblong adjustment hole extending along its length direction. The adjustment hole is connected to the connecting hole.

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