TWI890231B - Ceiling nail driver - Google Patents

Abstract

The invention pertains to a ceiling nail driver, comprising a main barrel, a guide pipe, a movable sleeve, a launch tube, a firing pin assembly, a driving assembly, a first elastic member, a second elastic member, and a third elastic member. The main barrel comprises a tube body and a raised wall portion, with the raised wall portion dividing the interior of the tube body into a first chamber and a second chamber that are interconnected. The guide pipe passes through the raised wall and is partially positioned on the tube body. The movable sleeve is insertable into the first chamber and encases the guide pipe. The launch tube is housed in the movable sleeve, accommodating a powder nail.The firing pin assembly is movably inserted into the guide tube, extending into the launch tube for striking the powder nail. The driving assembly is movably inserted into the second chamber and connected to the firing pin assembly in a co-moving relationship. The first elastic member is accommodated in the first chamber, the second elastic member is housed in the second chamber, and the third elastic member is accommodated in the guide tube.

Description

Ceiling Nailer

The present invention relates to a gunpowder driving device, and more particularly to a ceiling-mounted driving device.

A ceiling-mounted nailer, also known as a bamboo gun or ceiling-mounted gun, is primarily used to position fixtures (such as hanging plates) on high-rise objects such as ceilings and light steel frames. A ceiling-mounted nailer uses gunpowder as its power source, using the high-pressure gas generated by the gunpowder explosion to propel the nail, propelling it into the target. Taiwan Patent M405344 discloses this type of nailer.

However, the firing structure of the ceiling-mounted nailer disclosed in the aforementioned patent is overly complex. The numerous components not only make assembly difficult, but also require different processing methods for each component, which easily increases production costs. Therefore, there is a need to provide a novel and advanced ceiling-mounted nailer to address the aforementioned issues.

The primary objective of this invention is to provide a suspended nailer that utilizes a dual-chamber main barrel to position a guide tube inserted therethrough. The driver assembly and movable sleeve are slidably assembled with the guide tube within separate chambers, with the joint securely protected by the main barrel. Furthermore, the driver assembly is directly connected to the firing pin assembly, significantly simplifying the structure and reducing manufacturing costs. This also effectively enhances movement maneuverability and impact force transmission, enabling easy and rapid firing of the powder nail.

To achieve the above-mentioned object, the present invention provides a hanging top nailer, comprising: a main tube, a guide tube, a movable sleeve, a firing tube, a firing pin assembly, a drive assembly, a first elastic member, a second elastic member and a third elastic member. The main barrel includes a tube body and a convex portion, the convex portion radially protruding from the inner wall of the tube body, and the convex portion divides the interior of the tube body into a first chamber and a second chamber that are connected to each other; the guide tube is passed through the convex portion and fixed to the tube body to abut against a gunpowder nail; the movable sleeve is relatively movably inserted into the first chamber and relatively movably sleeved on the guide tube; the firing tube is located at one end of the movable sleeve away from the main barrel, and a gunpowder nail is accommodated in the firing tube; the firing pin assembly is movably passed through the guide tube to extend into the firing tube to strike the gunpowder nail The drive assembly is movably inserted into the second chamber and connected to the firing pin assembly to form a synchronous motion relationship. The first elastic member is accommodated in the first chamber and elastically abuts between the movable sleeve and the convex wall portion, causing the movable sleeve to have a tendency to move away from the convex wall portion. The second elastic member is accommodated in the second chamber and elastically abuts between the drive assembly and the convex wall portion, causing the drive assembly to have a tendency to move away from the convex wall portion. The third elastic member is accommodated in the guide tube and elastically abuts between the inner wall of the guide tube and the firing pin assembly.

1: Main barrel

11: Tube body

12: Convex Wall

13: First Chamber

14: Second Chamber

15: Positioning hole

16: Positioning piece

2: Guide pipe

21: Chute

22: First Pipeline

23: Second Pipeline

3: Movable Set

4: Transmitter tube

5: Firing pin assembly

6: Drive assembly

61: Connecting sleeve

62:Drive rod

63: Pins

71: First elastic member

72: Second elastic member

73: Third elastic member

81:Silencer

82: Insulation sleeve

9: Gunpowder nails

Figure 1 is a perspective view of an embodiment of the present invention.

Figure 2 is an exploded view of Figure 1.

Figure 3 is a cross-sectional view of Figure 1.

Figure 4 is a schematic diagram of the firing pin assembly striking the powder nail according to one embodiment of the present invention.

Figure 5 is a schematic diagram of the shell removal of an embodiment of the present invention.

The following examples illustrate possible implementations of the present invention and are not intended to limit the scope of protection sought by the present invention. The phrases "one" or "at least one" preceding any term herein do not limit the quantity; the term may also include "plurality" as needed. Such variations in quantity are also within the scope of protection sought, and are therefore warranted.

Please refer to Figures 1 to 5, which illustrate an embodiment of the present invention. The overhead striker of the present invention includes: a main cylinder 1, a guide tube 2, a movable sleeve 3, a firing tube 4, a firing pin assembly 5, a drive assembly 6, a first elastic member 71, a second elastic member 72, and a third elastic member 73.

The main cylinder 1 comprises a tubular body 11 and a raised wall 12. The raised wall 12 radially protrudes from the inner wall of the tubular body 11, dividing the interior of the tubular body 11 into a first chamber 13 and a second chamber 14. The main cylinder 1 can be integrally formed on a lathe, offering the advantages of rapid production and cost savings, thereby enhancing product competitiveness.

The guide tube 2 passes through the ridge 12 and is fixed to the tube body 11, where it abuts against a powder nail 9, forming a coaxial inner and outer tube structure. Specifically, the ceiling hammer includes at least one positioning member 16, and the main tube 1 includes at least one positioning hole 15. This at least one positioning hole 15 passes through the tube body 11 and the ridge 12, and the at least one positioning member 16 is inserted into the at least one positioning hole 15 to abut and position the guide tube 2. In this embodiment, there are two at least one positioning holes 15, arranged in a straight line. There are also two at least one positioning members 16, symmetrically clamping against the guide tube 2. Each positioning member 16 is a set screw.

More specifically, the guide tube 2 further includes a first tube portion 22 and a second tube portion 23 that are assembled together. The diameter of the first tube portion 22 is larger than that of the second tube portion 23. The first tube portion 22 is accommodated and positioned within the tube body 11. One end of the second tube portion 23 extends into the first chamber 13 and is assembled to the first tube portion 22. The other end of the second tube portion 23 extends into the launch tube 4 to abut the powder spike 9. The first tube portion 22 does not protrude from the tube body 11, thereby protecting the first tube portion 22 from foreign objects. In this embodiment, the end surface of the convex portion 12 abuts against the outer side wall of the guide tube 2 in the radial direction of the tube body 11. The convex portion 12 effectively restrains the guide tube 2, allowing it to extend axially without any deviation.

The movable sleeve 3 is movably inserted into the first chamber 13 and movably engages the guide tube 2. The joint between the movable sleeve 3 and the guide tube 2 is located in the first chamber 13 and protected by the tube body 11, ensuring a stable connection. The firing tube 4 is located at the end of the movable sleeve 3 distal from the main barrel 1. The firing tube 4 accommodates the powder spike 9. The firing pin assembly 5 is movably inserted through the guide tube 2 and inserted into the firing tube 4 to strike the powder spike 9.

The drive assembly 6 can be relatively movably inserted into the second chamber 14 and connected to the firing pin assembly 5 to form a synchronous relationship. The above-mentioned combination method eliminates the traditional complex firing transmission structure configuration between the drive assembly 6 and the firing pin assembly 5, making the overall structure very simple and easy to assemble; and, when the user applies force to activate the drive assembly 6, he will not be affected by the resistance caused by the firing transmission structure itself, so he can save effort and perform the firing quickly. In this embodiment, the guide tube 2 is provided with a sliding groove 21. The drive assembly 6 includes a connecting sleeve 61, a drive rod 62, and a pin 63. One end of the connecting sleeve 61 is threaded onto the drive rod 62, and the other end of the connecting sleeve 61 is sleeved onto the guide tube 2. The pin 63 passes through the sliding groove 21 to connect the firing pin assembly 5 to the other end of the connecting sleeve 61. The pin 63 slides along the sliding groove 21, allowing the drive assembly 6 and the firing pin assembly 5 to slide relative to the guide tube 2.

The first elastic member 71 is housed in the first chamber 13. It elastically rests between the movable sleeve 3 and the convex wall 12, causing the movable sleeve 3 to move away from the convex wall 12. During actual use, when the user compresses the movable sleeve 3 into the first chamber 13 to remove the cover, the first elastic member 71 resets the movable sleeve 3.

The second elastic member 72 is housed within the second chamber 14 and elastically abuts between the drive assembly 6 and the convex wall 12, causing the drive assembly 6 to move away from the convex wall 12. Similarly, during actual use, when the user pushes the drive assembly 6 into the second chamber 14 to initiate firing, the second elastic member 72 resets the drive assembly 6.

The third elastic member 73 is housed within the guide tube 2 and elastically abuts between the inner wall of the guide tube 2 and the firing pin assembly 5. When the firing pin assembly 5 is driven by the drive assembly 6 to fire the powder spike 9, the third elastic member 73 assists the first elastic member 71 in returning the drive assembly 6 and the firing pin assembly 5 to their original position.

In this embodiment, the two sides of the guide tube 2 pass through the first elastic member 71 and the second elastic member 72 respectively. The guide tube 2 can support the first elastic member 71 and the second elastic member 72 from the radial inner side and can accurately guide them in the axial direction. The third elastic member 73 is located inside the portion of the guide tube 2 that is in the first chamber 13, and thus the third elastic member 73 and the first elastic member 71 are coaxially arranged. Furthermore, the elastic force of the first elastic member 71 is greater than that of the second elastic member 72. This ensures that the movable sleeve 3 and the firing tube 4 remain protruding from the main barrel 1 during the firing process of the drive assembly 6 compressing the second elastic member 72, effectively preventing unintended ejection of the shell. Furthermore, the elastic force of the second elastic member 72 is greater than that of the third elastic member 73, providing a certain degree of support for the drive assembly 6 to prevent accidental firing and enhance safety.

It is worth mentioning that the actuation of the drive assembly 6 and the movable sleeve 3 are unrelated, and the two can be operated independently to reduce the linkage elements and resistance during their respective operations. For example, when the drive assembly 6 is actuated, it only compresses the second elastic member 72 and the third elastic member 73. Compared with the traditional structure, the resistance encountered by the user during the actuation process is smaller. When the shell is withdrawn to compress the movable sleeve 3, the resistance comes only from the first elastic member 71. Furthermore, the first and second elastic members 71 and 72 exert opposite elastic forces on the drive assembly 6 and the movable sleeve 3. Therefore, when the drive assembly 6 and the movable sleeve 3 are to be assembled with the guide tube 2, the guide tube 2 must first be unseated from the main tube 1. Assembly can then be achieved by compressing one of the first and second elastic members 71 and 72 to cause one side of the guide tube 2 to protrude from the main tube 1.

Preferably, the ceiling hammer further includes a silencer sleeve 81, which is mounted on the movable sleeve 3 and overlies the firing tube 4. Made of metal, the silencer sleeve 81 provides excellent structural strength. It effectively reduces the impact sound of the firing pin assembly 5 striking the powder nail 9, as well as the explosion of the powder nail 9. When the movable sleeve 3 approaches the convex portion 12 to its limit, the silencer sleeve 81 and the tube body 11 abut against each other, effectively limiting the position.

Another preferred embodiment includes a heat-insulating sleeve 82 that covers the silencer sleeve 81 to isolate the firing tube 4, which heats up after firing, from the outside world, thereby ensuring the user's personal safety.

1: Main cylinder 16: Positioning element 3: Sliding sleeve 6: Drive assembly 61: Connecting sleeve 62: Drive rod 82: Insulation sleeve

Claims (10)

A suspended hammer comprises: A main barrel comprising a tubular body and a convex portion, the convex portion radially protruding from the inner wall of the tubular body, the convex portion dividing the interior of the tubular body into a first chamber and a second chamber that are interconnected; A guide tube member extending through the convex portion and fixed to the tubular body for abutting a powder nail; A movable sleeve movably inserted into the first chamber and movably sleeved around the guide tube member; A firing tube disposed at an end of the movable sleeve distal from the main barrel, the firing tube housing the powder nail; A firing pin assembly movably extending through the guide tube member for extending into the firing tube to strike the powder nail; A drive assembly is movably inserted into the second chamber and connected to the firing pin assembly for synchronous movement. A first elastic member is accommodated in the first chamber and elastically abuts between the movable sleeve and the ridge, biasing the movable sleeve away from the ridge. A second elastic member is accommodated in the second chamber and elastically abuts between the drive assembly and the ridge, biasing the drive assembly away from the ridge. A third elastic member is accommodated in the guide tube and elastically abuts between the inner wall of the guide tube and the firing pin assembly. The ceiling nailer as described in claim 1, wherein the elastic force of the first elastic member is greater than the elastic force of the second elastic member. The ceiling nailer as described in claim 1, wherein the elastic force of the second elastic member is greater than the elastic force of the third elastic member. As described in claim 1, the ceiling nailer, wherein the guide tube is provided with a slide groove, the drive assembly includes a connecting sleeve, a drive rod and a pin, one end of the connecting sleeve is screwed to the drive rod, and the other end of the connecting sleeve is sleeved on the guide tube, the pin passes through the slide groove to connect the firing pin assembly and the other end of the connecting sleeve, and the pin slides along the slide groove. As described in claim 1, the two sides of the guide tube pass through the first elastic member and the second elastic member respectively, and the third elastic member is located inside the guide tube in the first chamber portion, and the third elastic member and the first elastic member are coaxially arranged. The ceiling nailer as described in claim 1 further includes a silencer sleeve, which is arranged on the movable sleeve and sleeves the launching tube. As described in claim 1, the guide tube further includes a first tube portion and a second tube portion that are assembled together, the diameter of the first tube portion is larger than the diameter of the second tube portion, the first tube portion is accommodated and positioned in the tube body, one end of the second tube portion extends into the first chamber and is assembled to the first tube portion, and the other end of the second tube portion extends into the launching tube to abut against the gunpowder nail. As described in claim 7, the ceiling nailer, in the radial direction of the tube body, the end surface of the protruding wall portion is against the outer side wall of the guide tube. The ceiling nailer as described in any one of claims 1 to 8 further includes at least one positioning member, and the main tube further includes at least one positioning hole, the at least one positioning hole passes through the tube body and the convex wall portion, and the at least one positioning member penetrates into the at least one positioning hole to press and position the guide tube. As described in claim 8, the elastic force of the first elastic member is greater than the elastic force of the second elastic member; the elastic force of the second elastic member is greater than the elastic force of the third elastic member; the guide tube is provided with a slide groove, the drive assembly includes a connecting sleeve, a drive rod and a pin, one end of the connecting sleeve is screwed to the drive rod, the other end of the connecting sleeve is sleeved on the guide tube, the pin passes through the slide groove to connect the firing pin assembly and the other end of the connecting sleeve, and the pin slides along the slide groove; the two sides of the guide tube are respectively passed through the first elastic member and the second elastic member, the third elastic member is located inside the guide tube in the first chamber portion, and thus the The third elastic member is coaxially arranged with the first elastic member; the ceiling nailer further includes a silencer sleeve and at least one positioning member, the silencer sleeve is arranged on the movable sleeve and sleeves the launching tube, the main tube further includes at least one positioning hole, the at least one positioning hole passes through the tube body and the convex wall portion, and the at least one positioning member penetrates the at least one positioning hole to press and position the guide tube member; when the movable sleeve approaches the convex wall portion to the extreme, the silencer sleeve and the tube body abut against each other; the first tube portion does not protrude from the tube body; there are two at least one positioning holes, and the two positioning holes are arranged in a straight line. There are two at least one positioning members, and each positioning member is a set screw.