JPH0248072Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Field of Industrial Application) The present invention relates to an improvement of a nozzle used for applying a sealant. (Prior Art) Generally, when applying a small amount of sealing material to a narrow place, a thin tube section 11 as shown in FIG.
A nozzle consisting of a mounting portion having a diameter is used, and is made of stainless steel, or made of iron or brass and chrome-plated. However, in the case of a sealant such as cyanoacrylate, if the application of the sealant is interrupted, it will solidify within the nozzle hole. Therefore, an attempt was made to manufacture the nozzle using tetrafluoroethylene. As a result, the above-mentioned problem of the sealing material solidifying inside the nozzle hole could be solved. (Problem to be solved by the invention) However, in the case of thin tubes with a hole diameter of 0.2 mm to 1.0 mm and an outer diameter of 0.5 mm to 2.0 mm, there is no rigidity, and the length L of the thin tube section is 15 mm. The misalignment amount a between the hole center of the attachment part of the seal material supply part and the hole center of the seal material outlet of the thin tube part is 1.5 mm, and 20
When it comes to mm, it is 2.0mm. Therefore, in normal application work, the length of the thin tube part must be at least 20 mm, the amount of misalignment is large, and there is variation in the dimensions, so it cannot be used due to the accuracy of sealing material application. Ta. Further, if the narrow tube part is mistakenly brought into contact with another member, it will be bent and the exit position of the sealing material will change, causing the problem that the sealing material cannot be accurately applied to a preset position. (Purpose) The purpose of the present invention was obtained as a result of studies aimed at providing a nozzle that hardly causes misalignment of the seal outlet of the thin tube portion. (Means for Solving the Problems) In order to achieve the above-mentioned object, the sealing material application nozzle of the present invention has a thin tube section and a hole communicating with the hole of the tube section, and is attached to a sealing material supply section. In the nozzle, the nozzle is formed of a fluororesin, and a reinforcing tube is placed over the thin tube portion with substantially no gap, and the tip of the thin tube portion is 2 mm or more from the reinforcing tube. The reinforcing tube is fixed to the mounting part with a protrusion of 10 mm. (Example) The structure of one example of the sealing material application nozzle of the present invention will be described based on the drawings. Reference numeral 1 denotes an attachment part, which has a hole 1a at one end for attaching to the sealing material supply part, and a hole 1b communicating with the hole 1a and attaching the thin tube section 2 to the other end, and a recess for attaching the reinforcing tube 3. 1c is provided. In addition, if the sealant supply part has a mounting hole,
It is necessary to have a configuration that allows the outer peripheral end of the attachment part 1 to be attached to the hole. The inner diameter of the hole in the thin tube part 2 is
A piece with a wall thickness of 0.2 mm to 1.0 mm and a wall thickness of 0.2 mm to 0.5 mm is used, and is fixed with a sealing material when inserted into the hole 1b of the mounting part 1. The above-mentioned attachment part 1 and thin tube part 2 are formed of a fluororesin such as trifluoroethylene or tetrafluoroethylene. The reinforcing tube 3 is inserted into the recess 1c of the attachment part 1 so that the tip of the thin tube part 2 projects, and is fixed with a sealing material. The amount of protrusion l of the thin tube section 2 is determined by the fact that the sealing material adheres to the outer circumference of the thin tube tip by approximately 0.2 mm due to the application operation of the sealant, so if the sealant solidifies at the outlet of the thin tube section 2, the tip section is cut off. It is necessary to protrude at least 0.2mm in order to use it. The outer diameter dimension D and inner diameter dimension d of the thin tube part 2 in the sealing material application nozzle of the present invention are 2.00 mm and 1.00 mm.
mm, 1.00mm and 0.30mm, 0.75mm and 0.20mm, the outer diameter dimension D of the thin tube part, the protrusion amount l, and
The relationship between the amount of misalignment a was measured and the results were as shown in Table 1.

[Table] From Table 1, when the outer diameter D of the thin tube part 2 is 2 mm, when the protrusion amount l becomes 20 mm, the misalignment amount a becomes larger than the outer diameter, and when the outer diameter D is 1 mm. When the protrusion amount l becomes 10 mm, the misalignment amount a becomes larger than the outer diameter dimension, and when the outer diameter dimension D is 0.75 mm, the misalignment amount a becomes larger than the outer diameter dimension when the protrusion amount l becomes 8 mm. It turns out that it becomes. Further, when the amount of protrusion is 10 mm or less, regardless of the tube diameter, even if the protruding thin tube portion 2 is brought into contact with another member by mistake, it will hardly bend. For these reasons, it is necessary to set the protrusion amount of the thin tube portion to 2 mm to 10 mm. It is preferable that the thin tube portion 2 and the reinforcing tube described above be inserted with no gap, but if a gap is provided due to manufacturing accuracy, it is necessary to make it as small as possible. Furthermore, the reinforcing tube 3 can be made of stainless steel, ceramic, or synthetic resin such as hard vinyl chloride. (Effect of the invention) The sealant application nozzle of the invention has a thin tube part,
In the nozzle, the nozzle has a hole communicating with the hole in the tube section and includes an attachment section for attaching to the sealing material supply section. cover with no
By fixing the reinforcing tube to the attachment part in a state where it protrudes by 10 mm to 10 mm, the following effects can be achieved. (1) Insert the reinforcing tube into the thin tube part without any gaps,
Since the tip of the thin tube part is fixed to the attachment part with the tip protruding 2 mm to 10 mm from the reinforcing tube,
Even if the tube that forms the thin tube section is bent, it will be corrected by the reinforcing tube, and even if the thin tube section accidentally comes into contact with a terminal, etc., it will hardly bend because it is supported by the reinforcing tube. , the sealing material can be applied accurately to a predetermined position. (2) Even if the distance from the sealant supply section to the position where the sealant is applied is long and the space is narrow, this can be easily handled by simply lengthening the mounting section of the reinforcing tube.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing one embodiment of the sealing material application nozzle of the present invention. FIG. 2 is a schematic cross-sectional view showing one embodiment of a conventional sealing material application nozzle. 1: Attachment section, 2: Thin tube section, 3: Reinforcement tube.

Claims (1)

[Scope of utility model registration request] A nozzle consisting of a thin tube portion and a mounting portion for attaching to a sealing material supply portion, the nozzle having a hole communicating with the hole of the tube portion, wherein the nozzle is formed of a fluororesin, and a reinforcing tube is provided in the thin tube portion. A nozzle for applying a sealing material, characterized in that the reinforcing tube is fixed to the attachment part with the reinforcing tube covered with substantially no gaps, and the tip of the thin tube part protrudes from the reinforcing tube by 2 mm to 10 mm.