JPH06104100B2 - Method for assembling forceps insertion opening of endoscope - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for assembling a forceps insertion port of an endoscope, in which a forceps channel is connected to a forceps insertion port formed on an operating portion of the endoscope. It is about.

[Prior Art] A forceps insertion port into which a treatment tool is inserted is generally provided in the vicinity of the lower end portion of the operation unit, and the mouth of a forceps channel communicating with the tip of the insertion unit is connected thereto. Since the forceps channel is pushed by the treatment tool with a strong force, it is necessary to firmly fix the mouth of the forceps channel to the operation portion. Therefore, conventionally, first, the mouthpiece attached to the mouth of the forceps channel is fixed to the inside of the forceps insertion opening formed on the outer wall of the operation portion, and the connection tube attached and fixed to the forceps insertion opening is fixed from the outside. It was inserted into the forceps insertion opening and connected to the mouthpiece (JP-A-58-19221).

[Problems to be Solved by the Invention] As described above, conventionally, the mouthpiece of the channel is fixed to the operation portion inside the forceps insertion opening portion. However,
At this fixed position, a slight displacement or inclination occurs with respect to the forceps insertion opening due to machining or variations in parts. For this reason, uneven stress remains by connecting to the connecting pipe that is mounted and fixed to the outer wall, and later peripheral parts are naturally damaged, and in some cases, connecting the base with the connecting pipe from the beginning. I couldn't do it, and sometimes I couldn't assemble it.

An object of the present invention is to provide a method for assembling a forceps insertion opening portion of an endoscope which eliminates such conventional defects, does not cause a defect in assembly, and is easy to assemble.

[Means for Solving the Problems] An assembling method of a forceps insertion opening portion of an endoscope according to the present invention for solving the above problems is to attach a mouthpiece to a mouth of a forceps channel and to operate the operation portion. A mounting table is provided inside the forceps insertion opening formed on the outer wall of the base, and the base is mounted on the mounting base with its rotation restricted, and the connection pipe that is screwed into communication with the base is connected to the forceps. It is characterized in that it is rotatably mounted to the insertion opening from the outside, and that the mouthpiece is screwed into this connecting pipe and pulled and fixed.

[Operation] Since the base of the forceps channel is mounted on the mounting table provided inside the forceps insertion opening while the rotation of the forceps channel is restricted, the position and orientation of the base are fixed and the connecting tube can be easily connected to the base. Can be screwed on. Then, by rotating the connection pipe, the base is attracted to the connection pipe and fixed away from the mounting table.

[Embodiment] An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 shows the vicinity of the forceps insertion opening when the assembly is completed,
Reference numeral 1 denotes an operation portion main body which is made of, for example, a synthetic resin and constitutes an outer wall of the operation portion, and 2 denotes a forceps insertion opening portion provided at a lower portion of the operation portion main body 1 in the forceps insertion opening portion 2.
The operation section body 1 is provided with a hole 3 communicating with the inside thereof. The diameter of the hole 3 changes in the middle part, and the screw part 4 is formed at the base of the hole. Reference numeral 5 is a stepped portion in a portion where the diameter of the hole 3 is changed.

A forceps channel 6 communicates with a forceps projecting port at the tip of the insertion portion (not shown), and is formed of a flexible tube of, for example, tetrafluoroethylene resin. 7 is
The mouthpiece is attached to the mouth of the forceps channel 6 via a joint pipe 8. As shown in FIG. 2, a screw portion 9 is screwed on the outer periphery of the projecting end portion, and the base end portion side. A flat portion 10 for stopping rotation is formed on the. A suction tube 11 communicating with a suction device (not shown) is connected to a side portion of the mouthpiece 7 via a joint pipe 12. The connecting pipes 8 and 12 are connected to the base 7 by, for example, silver brazing,
The forceps channel 6 and the suction tube 11 are connected by adhesion. Reference numeral 13 is a coil tightened to reinforce the connecting portion.

14 is a mounting table on which the base 7 is mounted during assembly,
It is fixed to the frame 15 in the operation portion main body 1 with screws inside the forceps insertion opening 2. In this mounting table 14, a groove 16 is formed in a flat surface portion 14a orthogonal to the axis of the hole 3, and the flat surface portion 10 under the mouthpiece is loosely engaged in the groove 16,
The base 7 can be placed substantially coaxially with the hole 3 so as not to rotate. Since FIG. 1 shows the state after assembly, the mouthpiece 7 is pulled toward the forceps insertion port 2 side and is slightly floating from the mounting table 16.

Reference numeral 17 denotes a connecting pipe that is screwed into communication with the base 7, and the connecting pipe 17 has an inner diameter substantially the same as that of the base 7 and has the hole 3
The collar portion 18 is inserted into the hole 3 from the outside, and the collar portion 18 comes into contact with the step portion 5 of the hole 3 and is rotatably mounted in the hole 3. Then, the threaded portion at the lower part thereof is screwed into the threaded portion 9 of the base, and the base 7 is attracted to the connection pipe 17 and fixed. 19 is the connecting pipe 17
The sealing material, 20a, sandwiched between the base and the base 7 is the connecting pipe 17
20b is an O-ring for water-tightly sealing the inside and outside of the operation portion main body 1, 21 is a known forceps plug, and is attached to the forceps insertion opening by a nut 22. It is attached to the attachment base 23.

Next, the assembly of the above embodiment will be described with reference to FIGS.

First, as shown in FIG. 3, the mouthpiece 7 is attached to the mouth of the forceps channel 6 via the joint pipe 8, and the mounting table 14 is fixed to the frame 15 in the operation portion main body 1.

Next, as shown in FIG. 4, the base 7 is mounted on the mounting table 14. As a result, the mouthpiece 7 is supported inward of the forceps insertion opening 2 substantially coaxially with the hole 3 in a state in which its rotation is restricted.

Next, as shown in FIG. 5, the connecting pipe 17 is mounted from the outside into the hole 3 of the forceps insertion opening 2, and the connecting pipe 17 is rotated and screwed with the base 7. With this, the base 7 is placed on the mounting table.
It is pulled away from 14 and drawn to the connecting pipe 17, and the seal material 19 is compressed and deformed and fixed.

Finally, as shown in FIG. 1, a forceps plug 21 is attached to the forceps insertion port 2.

EFFECTS OF THE INVENTION According to the method of assembling the forceps insertion port of the endoscope of the present invention, the base of the forceps channel is mounted on the mounting table provided inside the forceps insertion port with its rotation restricted. Therefore, the connecting pipe can be easily screwed and connected, and the assembling work is extremely easy.Moreover, since the mouthpiece is attracted to the connecting pipe and fixed away from the mounting table, the position of the mounting table is Even if there is variation in the direction, it has an excellent effect such that no assembling is possible and no excessive stress remains.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an assembled state of an embodiment of the present invention, FIG. 2 is a perspective view of its mouthpiece and a mounting table, and FIG. 3 is a perspective view showing a first step of an assembling method of the embodiment. FIG. 4 is a side sectional view showing the next step, and FIG. 5 is a side sectional view showing the next step. 1 ... Operation part main body, 2 ... Forceps insertion opening part, 3 ... Hole, 6
...... Forceps channel, 7 …… Mouthpiece, 14 …… Standing table, 17 ……
… Connection tube.

Claims (1)

[Claims] 1. A mounting base is attached to the mouth of a forceps channel, and a mounting table is provided inside the forceps insertion opening formed on the outer wall of the operating portion, and rotation of the mouthpiece is restricted by the mounting base. Characterized in that a connection tube that is screwed and communicated with the mouthpiece is rotatably attached to the forceps insertion opening from the outside, and the mouthpiece is screwed into the connection tube and pulled and fixed. A method for assembling a forceps insertion opening of an endoscope.