JP3176519U - Telescopic blow gun tube part of air blow gun - Google Patents

Abstract

An air blow gun expansion / contraction blow gun tube portion is provided which can be stretched by continuously adjusting the length of the blow gun tube and connecting a plurality of blow gun tube portions.
A telescopic blow gun tube portion of an air blow gun according to the present invention includes a stretched tube body 10, a screwed structure 20, and a blow gun tube 30. The stretched tube body 10 has large and small stepped through holes. 14, the blow gun tube 30 is accommodated, one end of the extending tube body 10 includes an inner tapered surface 112 inclined inward, and the screwing structure 20 includes a screwing component 21, and the screwing component 21 and the extending tube body 10 is screwed and connected, and an elastic cylindrical holding part 22 and a sealing part 23 are arranged in the screwing part 20, and the inner tapered surface 112 of the elongated tubular body 10 is connected to the elastic cylindrical holding part 22 and the sealing part 23. In addition to guiding and pressing the sealing part 23, the sealing part 23 causes deformation with elasticity, tightens the blow gun pipe 30 to seal the stretched tube body 10, and damages the blow gun pipe 30 to provide a preferable clamping force. Do not play the effect.
[Selection] Figure 1

Description

  The present invention relates to an expansion / contraction blow gun tube portion of an air blow gun, and more particularly, to an expansion / contraction blow gun tube portion of an air blow gun that can perform stepless expansion / contraction adjustment to the length of the blow gun tube and can be extended by connecting a plurality of blow gun tube portions.

  A telescopic blow tube of a conventional air blow gun is as shown in FIGS. 8 and 9, and mainly includes a stretched tube body 50. One end of the extending pipe body 50 is connected to the blow gun 5, and the end head 51 at the other end of the extending pipe body 50 is provided with a cushion ring 61, an O ring 62, and an O ring 63 disposed at the end of the end head. In addition, a metal cylindrical holding portion 70 is screwed. A nut 72 is screwed into the elastic cylindrical holding part 71 at the front end of the cylindrical holding part 70. One end of the blow tube 80 is accommodated in the extending tube body 50, passes through the cushion ring 61 and the O-ring 62, and a position stop ring 81 is screwed to the end, so that the blow tube 80 is placed in the extending tube body 50. The blow pipe 80 is fixed by using a nut 72 at an arbitrary position and the blow pipe 80 is expanded and contracted.

  As shown in FIG. 8, the above-described cylindrical sandwiching portion 70 is made of a metal material. Particularly, the elastic cylindrical sandwiching portion 71 at the front end forms a groove portion 72 using a processing machine. In many cases, unseparated iron scraps remain on the edge of the groove 72, and if the worker does not wipe off, the blow pipe 80 is rubbed by the remaining iron scraps to cause surface damage.

  Further, when the elastic cylindrical sandwiching portion 71 made of the metal material sandwiches the blow tube 80, the two metal materials collide with each other, leaving a concave ridge on the surface of the blow tube 80, and the user inadvertently blowing. When the tube 80 is pulled and moved, the surface of the blow tube is further crushed by the elastic cylindrical sandwiching portion 71, and the scratches attached when the blow tube 80 expands and contracts damages the O-ring 62, causing compressed air leakage. , Reduce the service life of the blow gun.

None

  The conventional telescopic air tube of an air blow gun uses a processing machine to form a groove portion in an elastic cylindrical sandwiching portion made of metal, so that the manufacturing cost is high, and iron scraps remaining on the edge of the groove portion cause the blow gun tube surface to There has been a problem that brazing and metal materials collide with each other, and a dent wrinkle left on the blow tube surface brazes the O-ring when the blow tube expands and contracts, causing compressed air leakage.

The telescopic blow gun tube portion of the air blow gun of the present invention provided to solve the above-described problem includes an extended tube body, a screwed structure, and a blow gun tube.
Among them, the stretched tube body includes a front connecting end portion and a rear connecting end portion facing the front connecting end portion, and the front connecting end portion and the rear connecting end portion are each provided with a thread, The inside is provided with stepped through holes having large and small hole diameters, and a stepped stop portion is formed.
The screwed structure includes a screwed part, the screwed part includes the other end opposite to one end, an inner screw hole is provided at one end of the screwed part, and a hole diameter is an inner screw at the other end of the screwed part. A through hole smaller than the through hole is provided, and the inner screw hole is connected to the through hole. An elastic cylindrical sandwiching part and a sealing part are arranged in the threaded part, and the threaded part is screwed to the thread of the front connection end of the extending tube using the inner threaded hole. The elastic cylindrical sandwiching portion includes one end, the end is provided with a tapered surface, and a plurality of notches are provided around the tapered surface.
The blow gun tube extends into the stepped through hole 14 inside the extending tube body, and a position stop ring is fixed to the end of the blow gun tube extending into the extending tube body, and the corresponding stepped stop portion is pressed.

  In the telescopic blow gun tube portion of the air blow gun, an inner tapered surface inclined inward is provided at one end of the front connecting end portion of the extending tube body.

  In the telescopic blow gun tube portion of the air blow gun, a screw thread is provided on the outer side of the other end opposite to the position stop ring of the blow gun tube, and another screw structure is further screwed to connect another stretched tube body. .

  The elastic cylindrical sandwiching portion of the present invention is made of a non-metallic engineering plastic and has many advantages such as a lightweight material, smooth sliding, easy and quick manufacture, and low cost. In addition, since the material of the elastic cylindrical clamping portion is rich in elasticity and has a good clamping force at the time of clamping, the surface of the blow gun tube is not damaged.

  The telescopic blow gun tube part of the air blow gun of the present invention uses a threaded structure adjustment to allow stepless expansion and contraction to adjust the length of the blow gun tube. Can be used to jet compressed air. In addition, the material of the elastic cylindrical sandwiching part that sandwiches the blow gun tube is light and can smoothly slide, and the material is rich in elasticity, so the clamping force at the time of clamping is good, and the surface of the blow gun tube is not scratched, It has many advantages such as easy and quick manufacturing and low cost, and has practicality, novelty and inventive step.

It is a three-dimensional exploded view of the present invention. It is a partial sectional view of the present invention. It is explanatory drawing of embodiment of this invention screwed together to the blow gun. It is explanatory drawing of the screwing structure which screwed the blow gun pipe | tube. It is explanatory drawing of the screwing structure which loosened the blow gun pipe | tube and made it the free movable state. It is explanatory drawing which mounted | wore the air blow gun of another type with this invention. It is explanatory drawing of the multistage expansion-contraction blowgun pipe | tube of this invention. It is an assembly drawing of a known telescopic blow gun tube structure. It is an enlarged view of A location shown in FIG.

  As shown in FIGS. 1 to 3, the telescopic blow gun tube portion of the air blow gun of the present invention includes an extending tube body 10, a screwing structure 20, and a blow gun tube 30.

  The stretched tube body 10 includes a front connecting end portion 11 and a rear connecting end portion 12 facing the front connecting end portion 11, and the front connecting end portion 11 and the rear connecting end portion 12 are threaded threads 111, 121, respectively. The rear connecting end 12 is connected to the rotary connecting part 13 and combined with the blow gun 40. The inside of the drawn tube body 10 is provided with stepped through holes 14 having large and small hole diameters to form a stepped stop portion 141. The small hole diameter of the through-hole 14 is positioned at the 11 positions of the front connection end, and has an appropriate length to support the blow gun tube 30. The end position of the front connection end 11 is inclined inwardly. A tapered surface 112 is provided.

  The screwing structure 20 includes a screwing part 21, the screwing part 21 includes the other end opposite to one end, an inner screw hole 211 is provided at one end of the screwing part 21, and the other end of the screwing part 21 is provided. A through hole 212 having a smaller hole diameter than the inner screw hole 211 is provided, and the inner screw hole 211 is connected to the through hole 212. An elastic cylindrical clamping part 22 and a sealing part 23 are arranged in the threaded part 21, and the threaded part 21 is threaded on the front connecting end part 11 at the front end of the stretched tube body 10 using the inner threaded hole 211. Then, the sealing member 23 is positioned on the inner tapered surface 112 at the front end of the extending tube body 10. The elastic cylindrical sandwiching portion 22 includes one end, and is provided with a tapered surface 221 at the end, and a plurality of notches 222 are provided around the tapered surface 221, thereby providing a deforming function with elasticity on the tapered surface 221. In addition, a pinching effect is produced during deformation.

  The blow gun tube 30 extends to the stepped through hole 14 in the extending tube body 10 to freely expand and contract, and a position stop ring 31 having a relatively large diameter is provided at the end of the blow gun tube 30 extending into the extending tube body 10. The position stop ring 31 is accommodated in the large through-hole 14 in the extending pipe body 10 and slides in the large through-hole 14, and is limited by the small through-hole 14. Since the corresponding stepped stop portion 141 is pressed, the blow gun tube 30 does not come off.

  As shown in FIGS. 4 and 5, the fixed or stepless expansion / contraction sliding of the blow gun tube 30 is mainly controlled by screwing the screwing structure 20, loosening the screwing part 21, and the elastic cylindrical holding part 22. By separating these, the elastic cylindrical sandwiching portion 22 can be returned to the initial state (see FIG. 5). When the blow gun tube 30 is detached from the sandwiching of the elastic cylindrical sandwiching portion 22 and can be freely slid within the stretched tube body 10, the angle of the blow gun tube 30 is arbitrarily rotated and can be changed according to the use environment.

  As shown in FIGS. 1 to 4, when the blow gun tube 30 is extended to the end of the longest end, the position stop ring 31 is limited by the stepped stop portion 141 of the stepped through hole 14, and the stepped stop portion 141. There is no worry of falling out because it stops at.

  When it is desired to tighten the blow gun tube 30 and fix the position, it is only necessary to screw the screwing part 21. The elastic cylindrical holding part 22 is gradually tightened using the screwing part 21, and the taper of the elastic cylindrical holding part 22 is tightened. The surface 221 is pressed to cause deformation with elasticity to sandwich the blow gun tube 30, and the blow gun tube 30 is localized.

  As shown in FIG. 1, the above-described elastic cylindrical sandwiching portion 22 is made of a non-metallic engineering plastic and has many advantages such as a lightweight material, smooth sliding, easy and quick manufacture, and low cost. . In addition, the design of the notch 222 allows the elastic cylindrical clamping portion 22 to be deformed with elasticity and pinch an object, and the material of the elastic cylindrical clamping portion 22 is rich in elasticity, and the clamping force during clamping Is good, so that the surface of the blow gun tube 30 is not damaged.

  As shown in FIG. 1 and FIG. 3, the sealing component 23 provided in the screwing structure 20 is disposed between the elastic cylindrical sandwiching portion 22 and the inner tapered surface 112 of the extending tubular body 10, and the screwing component 21 forms an elastic cylindrical shape. When the clamping portion 22 is screwed, the elastic cylindrical clamping portion 22 is pressed and the inclined surface of the inner tapered surface 112 is guided downward, causing deformation with elasticity, and the blow gun tube 30 is tightened to stretch the tube. The body 10 is sealed. As a result, the stretched tube body 10 achieves a sealing effect using the sealing component 23 and has an effect of tightly sandwiching the blow gun tube body 30, thereby eliminating the risk of compressed air leaking from the 20 screwed structures.

  As shown in FIGS. 3 and 6, the present invention can be used by combining various air blow guns 40 according to different technical fields and different usage environments by combining the rotary connecting part 13 and various types of blow guns 40. it can. The stepless expansion / contraction blow gun tube 30 can be used in an extremely convenient manner because it allows the compressed air jet operation to be carried out by extending the length of the blow gun tube 30 into a dangerous place or narrow gap. .

  As shown in FIGS. 1 and 2, a tapered surface 213 having the same gradient as that of the tapered surface 221 of the elastic cylindrical sandwiching portion 22 is provided at the end of the inner screw hole 211 bottom of the threaded component 21. The taper surface 213 of the threaded component 21 presses the taper surface 221 of the elastic cylindrical sandwiching portion 22, and the elastic cylindrical sandwiching portion 22 gradually contracts to tightly sandwich the blow gun tube 30. The contraction and clamping work is smoothed, a good clamping force is provided at the time of clamping, and the surface of the blow gun tube 30 is not damaged during clamping.

  FIG. 7 shows an embodiment of a blow gun tube having a multistage telescopic function according to the present invention. In this embodiment in which a plurality of extending tube bodies 10 are connected, three extending tube bodies 10, 10A, and 10B are fitted, and a blow gun tube 30 is fitted to the terminal extending tube body 10B. Between the stretched tube bodies 10, 10A, 10B or between the blow gun tubes 30 fitted to the end stretched tube body 10B, screwed structures 20, 20A, 20B are screwed and connected, whereby a multistage stretched tube is obtained. A structure combining the bodies 10, 10A, 10B and the blow gun tube 30 is formed, and the length of the blow gun tube 30 and the extending tube body 10 can be extended, so that the end of the blow gun tube 30 can reach a farther place, In particular, it can be carried out very conveniently even when performing blow work on large equipment, equipment, or deep grooves, and since the use space is reduced after shrinking the length, it is very practical.

  According to the above description, the present invention uses the adjustment of the screwing structure to enable the stepless length extension and localization of the blow gun tube, so that the compressed air can be introduced into dangerous places and narrow gaps. Can perform jet work. In addition, the material of the elastic cylindrical sandwiching part that sandwiches the blow gun tube is light and can smoothly slide, and the material is rich in elasticity, so the clamping force at the time of clamping is good, and the surface of the blow gun tube is not scratched, It has many advantages such as easy and quick manufacturing and low cost, and has practicality, novelty and inventive step.

10: Stretched tube
11: Front connection end
111, 121: Screw thread
12: Rear connection end
112: Inner taper surface
13: Rotating connection parts
14: Through hole
141: Stepped stop
20: Screwed structure
21: Screwed parts
211: Inner screw hole
212: Through hole
213: Tapered surface
22: Elastic cylindrical clamping part
221: Tapered surface
222: Notch
23: Sealing parts
30: Blow gun tube
31: Position stop ring
40: Blow gun
5: Blow gun
50: Stretched tube
51: End head
61: Cushion ring
62, 63: O-ring
70: Tube clamping part
71: Elastic cylindrical clamping part
72: Nut
80: Blow tube
81: Position stop ring

Claims (3)

In the telescopic blow gun tube portion of the air blow gun including the stretched tube body, the screwed structure, and the blow gun tube,
The stretched tube body includes a front connecting end portion and a rear connecting end portion facing the front connecting end portion, each of the front connecting end portion and the rear connecting end portion is provided with a thread, , With stepped through holes with large and small hole diameters, forming stepped restraints,
The screwed structure includes a screwed part, the screwed part includes an other end opposite to one end, an inner screw hole is provided at one end of the screwed part, and the other end of the screwed part is provided. The through hole is smaller than the inner screw hole, and the inner screw hole is connected to the through hole.In the screw part, an elastic cylindrical sandwiching part and a sealing part are arranged. Screwed to the thread of the front connection end portion of the elongated tubular body using the inner screw hole, the elastic cylindrical sandwiching portion includes one end, the end is provided with a tapered surface, around the tapered surface, Provide multiple notches,
The blow gun tube extends into a stepped through hole inside the extending tube body, and a position stop ring is fixed to the end of the blow gun tube extending into the extending tube body, and the corresponding stepped stop portion is pressed. The telescopic blow gun tube part of the air blow gun.   2. The telescopic blow gun tube portion of an air blow gun according to claim 1, wherein an inner tapered surface inclined inward is provided at one end of the front connecting end portion of the extending tube body.   The expansion / contraction blow gun tube portion of the air blow gun according to claim 1, wherein another extension tube is screwed to the extension tube.