JPS58109035A - Pressing cylinder for x-ray diagnosis - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compression tube for X-ray diagnosis, and its object is to provide a compression tube that is lightweight, has high rigidity, and has good X-ray transparency.

Conventionally used compression tubes for X-ray diagnosis have been made of solid wood rods in order to have good X-ray transparency and to prevent damage during handling. X
As shown in Figure 1, it is possible to form a clear X-ray image even when X-ray diagnostic equipment is used, such as the requirement to reduce X-ray waves and the amount of water used by the examinee during X-ray diagnosis. Attempts have been made to develop a compression tube with a cross-sectional shape that has good X-ray transparency;
If a compression cylinder with this shape is made of wood, it can have good X-ray transparency, but the connection between the compression part (1) and its support rod (2) shown in Figure 4 Because the strength of the compression tube is extremely low and it breaks easily, it has not been possible to make it into a practical compression tube. Furthermore, attempts have been made to develop a compressed tube with a cross-sectional shape as shown in Figure 1 using unidirectionally aligned carbon fiber prepreg or carbon fiber cross prepreg, but this cannot be achieved without folding the prepreg when forming the compressed part. Moreover, the X-ray transmission performance varies depending on the location of the compression part, and the development of a compression cylinder with sufficient performance has not been successful at present.

Therefore, the inventors of the present invention took into consideration the above-mentioned current situation and completed the present invention as a result of studies aimed at developing a compression tube for X-ray diagnosis that satisfies the above-mentioned requirements.

The present invention consists of a hollow hemispherical soft part and a compression part support provided at one end of this compression part, and the joint part between the compression part and the arm part is made of carbon fiber with an average fiber length of 1 to 5 degrees. A rod-shaped or plate-shaped molded material containing ~70 volumes is arranged so that the surface of this molded material is arranged parallel to the wall thickness in the cross section of the hemispherical soft part of the compression tube, and the in-plane pressure of the compression tube is polished in a two-dimensional direction. The compression tube for X-ray diagnosis is characterized by being randomly oriented.

The carbon fiber used in carrying out the present invention is
Pitch-based carbon fibers, charcoal-based carbon fibers, acrylonitrile-based carbon fibers, etc. can be used as long as they have good radio transparency, and the X-ray transparency of compression tubes made using these carbon fibers is reduced. Aromatic polyand fibers and the like can also be used in combination within the range that does not cause any adverse effects.

Various types of matrix resins such as thermosetting resins and thermosetting resins can be used as the matrix resin used in carrying out the present invention, such as polyolefin resins such as polyethylene, polypropylene, and vinyl acetate-ethylene resins, polyester resins, etc. , thermoplastic resins such as polyamide resins.

Vinyl ester resins, epoxy resins, unsaturated polyester resins, phenolic resins, etc. that can form a three-dimensional crosslinked structure in the resin by heat treatment or treatment with other energy sources, such as electron beams or radiation. However, considering the molding workability of the molding material obtained from these materials, it is preferable to use a thermosetting resin as the matrix resin. Fiber length l~
A material containing 10 to 70 volumes of 50 m of carbon fiber) I
It is made of JTx resin impregnated material, and its shape is 1 to 501111. It is preferable that the reinforcing fibers be in the form of a plate or stick with a width of 1 to 20 mm, and that the reinforcing fibers be oriented in the longitudinal direction of the molded material as much as possible.

K, which makes the compression tube of the present invention using the above molding material, loads a predetermined amount of the above molding material into a mold and molds it by transfer molding or compression molded isopressure, and the molded material is as shown in FIG. As shown in Figure 1, in the mold, the hemispherical soft part of the compression tube is perpendicular to its cross-sectional wall thickness, and the in-plane pressure of the compression tube is extremely smooth in the two-dimensional direction as shown in Figure 1. It flows and forms the hemispherical soft part of the compression tube,
A similar flow of the molding material is observed in the arm portions as shown in FIG. 3, and it can be made to have extremely excellent strength.

In addition, the above-mentioned molded material at the junction between the hemispherical soft part and the arm part is formed in a direction perpendicular to the wall thickness in the plane of the hemispherical soft part and in the arm part plane, as shown in Fig. 4. Because of the extremely good flow, this joint can be of significantly increased strength compared to previously developed joints.

In addition, in the hemispherical soft part, the molded material is plate-shaped and extremely uniformly oriented, so the X-ray transparency is uniform and good, compared to conventionally developed compression tubes. The amount of radiation a subject is exposed to during X-ray diagnosis can be significantly reduced, and a clear X-ray image can be formed even when a low-ray source of X-rays is used as an X-ray diagnostic apparatus.

The cut length of the carbon fiber is preferably 1 to 505 m on average.

Below 1m, the reinforcing effect is poor, and above 5011, Table 1
As shown in the figure, there is no improvement in the reinforcing effect (the fluidity of the material becomes poor.More preferably 12.5 to 25 rugs.On the other hand, for partial reinforcement, fibers of 50III or more are unidirectionally woven into 9 It is also possible to include it in the form of a braid or the like within a range not exceeding 50%.

The higher the content of the reinforcing carbon fiber in the thermosetting resin, the better, but considering the reinforcing effect and fluidity during molding,
It is preferable to contain fibers having a volume of 5 to 70, more preferably 50 to 65.

The shape of the molding material should be a plate or rod with a length of 1 to 50 m and a width of 1 to 20 U to ensure good moldability. This is undesirable because the moldability during molding decreases and it becomes impossible to obtain a compression cylinder with high Xa permeation properties and strength.

Example 1 A carbon fiber tow of 10,000 filaments was impregnated with epoxy resin and then cut into lengths as shown in Table IK.
A non-adhesive molded material having a width of approximately 51Ell was made. This molded material had a carbon fiber content of 50 volumes.

The molding material obtained as described above was filled into a compression mold and cured by heating and pressing.

The cross-section of the hemispherical soft part and arm part of the obtained compression tube shows extremely uniform flow in the direction perpendicular to the wall thickness, as shown in (1) in Figure 2, and in the flat part. As shown in (2) K in Figure 1, the flow was random and uniform in two dimensions.

In addition, in the cross section of the joint between the hemispherical soft part and the arm, the molding material flows extremely uniformly across both parts, and even in the cross section of the arm, as shown in FIG. The flow was perpendicular to the wall thickness.

Table 1 shows the results of measuring the bending strength and bending modulus of the obtained compression cylinder.

Table 1 Also, the length 25 m and thickness 0.111 obtained as above
A compression cylinder having a wall thickness as shown in Table 2 was created by filling a mold with a molding material with a width of 71111% of 1%, and its deflection characteristics were determined.
Table 2 shows the results of measuring the X-ray transmission properties and weight.

Table 2 Figure II1 shows a plan view of the compression tube of the present invention,
FIG. 2 is a cross-sectional view taken along line AA, FIG. 3 is a cross-sectional view taken along line B-B, and FIG. 4 is a cross-sectional view of the joint between the compressible part and the arm.

Fountain/Figure Sho 2 map L3 diagram 4 tails

Claims (1)

[Claims] Approximately hemispherical stiffness, arms, and arm joints have an average fiber length of 1 to 5.
Length 1-50 containing over 10-70 volumes of carbon fiber
M, rod-shaped or plate-shaped molded materials having a width of 1 to 20 mm are arranged in a direction substantially perpendicular to the cross-sectional thickness direction of the arm portion and the arm portion, and within the plane of the arm portion and the arm portion. The molded material is randomly oriented in two-dimensional directions, and at the joint between the arm and the arm, the molded material is arranged over the arm and the arm. A compression tube for X-ray diagnosis.