JPH045306Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for fixing a lining material applied to the inner surface of a hopper of a ship's hold or storage tank, the inner surface of a shooter for transporting cargo, etc.

[Conventional technology]

Conventionally, there has been a structure shown in FIG. 7 in which a synthetic resin lining material is fixed to a lining material construction surface (hereinafter referred to as construction surface) such as the above-mentioned inner surface. The structure of the fixing part in the same figure has 2 screw threads on the construction surface 1.
A protruding stud 2 with a
A stepped recess 5 formed in the lining material 4 is pressed against the construction surface 1 by a nut 3 screwed into the stud 2, and a stopper 6 made of synthetic resin is hammered into the stud 2. This prevents the nut 3 from loosening and makes the surface of the lining material 4 flat.

However, according to the conventional fixing part structure, in order to fix one place of the lining material 4, the nut 3 is
Therefore, a large number of lining materials 4... were fixed to a large construction surface 1, such as a hopper H of a ship hold as shown in Fig. 5, and , when each sheet of lining material 4... has to be fixed at multiple points, not only does construction require a great deal of time and effort, but also the corners of the construction surface 1 are not properly secured. It was difficult to secure a large working space, and the construction of the lining material 4a in that area was extremely difficult and troublesome.

In addition, when the plug body 6 is engaged with the thread 2a of the stud 2 without loosening, the nut 3 is prevented from loosening due to vibrations applied to the construction surface 1, the lining material 4, etc.; If the engagement between the body 6 and the screw thread 2a becomes loose, the loosening prevention effect of the plug body 6 against the nut 3 will not be sufficiently exerted, and the nut 3 will likely rotate due to the vibration and loosen. . However, since the plug body 6 is made of synthetic resin and only engages with the thread 2a of the stud 2, the width of engagement between the lining material 4 and the thread 2a is small, and the lining material 4
When vibration is transmitted from the stud 2 to the engagement portion between the studs 2 and 2, the engagement portion on the plug 6 side is crushed relatively easily, and the plug 6 tends to loosen. Therefore, the nut 3 was likely to loosen early. In addition, the thicker the lining material 4, the more expensive it is, and in order to increase economic efficiency, it is necessary to reduce the thickness of the lining material.
The thinner the lining material used, the less the number of engagements between the threads of the nut 3 and the threads 2a of the stud 2 and the number of threads 2a that engage with the lining material 4. This tends to cause loosening of the nut 3 and the accompanying loosening of the nut 3. Therefore, it was necessary to sacrifice economic efficiency to some extent in order to obtain a reliable fixed state over a long period of time.

[The problem the idea is trying to solve]

As described above, the conventional fixing part structure has the problem that workability is particularly poor when applying lining material to a large construction surface, and furthermore, the fixing part is likely to loosen due to vibration after installation. This is done by screwing the nut 3 into the stud 2, pressing the lining material 4 against the construction surface 1, and then screwing the nut 3 into the stud 2.
This is due to the fact that the nut 3 is prevented from loosening by the plug 6 that is driven into the hole.

The present invention solves these problems by making it possible to fix the lining material without using extra parts such as nuts or plugs, thereby making it possible to fix the lining material with extremely simple work. Moreover, it is an object of the present invention to provide a fixing part structure for a lining material that does not easily cause loosening of the fixing part.

[Means for solving problems]

The measures taken to achieve the above objectives are that studs protruding from the construction surface dig into the lining material, and the lining material has a sawtooth cross-sectional shape formed around the outer periphery of the studs. This means that the engaging part that has the lock is locked.

[Effect]

According to such a fixing part structure, the lining material into which the stud bites is fixed to the construction surface by the engaging part of the stud having a serrated cross-sectional shape, and loosening of the fixed part due to vibration is prevented.

〔Example〕

FIG. 1 shows a fixing part structure according to an embodiment of the present invention. In the figure, a stud 10 is vertically protruded from a construction surface 11 by means such as welding, and an engaging portion 12 having a sawtooth cross-sectional shape is formed at a predetermined location on its outer periphery. At the same time, the top portion 13 is formed into a trapezoidal shape. This stud 10 digs into the lining material 14 up to an intermediate portion in the thickness direction. In addition, the engaging portion 12
The lining material 14 enters between the plurality of tooth portions 12a of the lining material 1.
4 is locked to the engaging portion 12. The tooth portion 12a is formed into a ring shape in several stages.

The lining material 14 is made of a synthetic resin plate with high abrasion resistance and smoothness, such as ultra-high molecular weight polyethylene resin. For example, as shown in FIG. The lining material 14 can be brought into the state shown in FIG.
is fixed. Therefore, when installing the lining material 14, the nut 3 and the plug body 6 are
(See Figure 7) There is no need to screw or hammer in the studs 10 on the construction surface 11.
The construction is completed by simply hammering the lining material 14 into the stud 10 after protruding it by an appropriate means such as welding. Therefore, even when a large number of lining materials 14 have to be fixed one by one at multiple points on a large construction surface 11, the work can not only be carried out efficiently, but also the corner of the construction surface 1 explained in FIG. This makes it possible to easily fix the lining material 4a even in places where it is difficult to secure a sufficiently large working space.

Furthermore, according to the fixed part structure explained in FIG.
Since the lining material 14 and the stud 10 do not rotate relative to each other due to vibration applied to the fixed part from the lining material 14 or the construction surface 11, there is no fear that the fixed part will become loose due to such relative rotation.
Further, the surface of the lining material 14 has studs 1
Since the 0 does not protrude, there is no unevenness on the surface of the lining material 14 at the fixed portion, and there is no fear that powder or granules will get caught.

In addition to the above-mentioned hammering, the means for biting the stud 10 into the lining material 14 may include, for example, a method of pressing the lining material 14 against the stud 10 as shown in FIG. 2 and then strongly pressing it in the direction of arrow F. is also possible. Top 13 of stud 10
It is desirable that the shape of the stud 10 be changed as appropriate in consideration of various circumstances such as the method used to insert the stud 10 or the degree of hardness and elasticity of the lining material 14. In addition to having a trapezoidal tip, the shape of the top 13 may be a cone or pyramid with a pointed tip, or a cone or pyramid with a rounded tip.

Furthermore, even if the lower surface 12b of the engaging portion 12 is perpendicular to the axis C of the stud 10 as shown in FIG.
b may be inclined upward by an angle θ ₃ with respect to a line perpendicular to the axis C, and the lower surface 12b may be inclined upward by an angle θ ₄ with respect to a line perpendicular to the axis C as shown in FIG. It may also be inclined downward.
However, in any case, the angle θ ₁ of the upper surface 12c of the tooth portion 12a with respect to the line perpendicular to the axis C
Of course, it is necessary that the angles θ ₃ and θ ₄ are smaller than the angles θ 3 and θ 4 . If this is not done, the fourth
This is because, in the case of FIG. 4A, the locking action of the engaging portion 12 is drastically weakened, making it impossible to obtain a sufficiently strong fixing force, and in the case of FIG. 4B, the tooth portion 12a cannot be formed. On the other hand, as shown in FIGS. 3 and 4, it is preferable that the upper surface 12c of the uppermost tooth portion 12a is formed to continue in a straight line up to the top 13 of the stud 10, and the tooth portions 12a... …
Of the inclination angles θ ₁ and θ ₂ of the upper surfaces 12c, it is desirable that the inclination angle θ ₁ of the uppermost stage is made smaller, and the others are set the same. By doing this, when the stud 14 is inserted into the lining material 14,
After being bitten in smoothly and fixed, the distance between the top portion 13 and the upper surface of the lining material 14 can be increased. Furthermore, the compressed hole wall surface of the lining material 14 that occurs as the stud 14 bites in will fit uniformly between the teeth 12a after the biting, improving the reliability of the fixed part. . Note that when lining materials made of high molecular weight polyethylene resin are used to fix each sheet of lining material to the inner surface of a hopper in a hold at multiple points, the above angles θ ₁ , θ ₂ , θ ₃ , θ ₄ are each θ ₁
= 30 to 60 degrees, θ ₂ = 50 to 85 degrees, θ ₃ = 0 to 30 degrees, θ ₄ =
If the temperature is set at about 0 to 30 degrees, it will not interfere with pounding and will also ensure that the lining material is fixed.
In addition, since the fixing part structure of the present invention can be formed by simply hammering or pushing the lining material into the studs as described above, the fixing part structure when temporarily fixing the lining material to the construction surface as shown in Figure 6 is also useful. It is also beneficial. In this case, the lining material 14 is suitably provided with stepped recesses as explained in FIG.
It is temporarily fixed by tapping it into the stud 10 protruding from 1. Thereafter, a threaded stud is welded through the recess, and a nut and plug body 6 are fitted and fixed.
By doing so, there is no need to input and press the lining material 14 against the construction surface, and the installation work can be easily performed. In addition, the lining material 14
Thermal expansion and contraction of the material is absorbed by the stepped recesses, and there is no waving. In particular, if the lining material 14 is temporarily fixed at the center as shown in the figure, thermal expansion and contraction will be smoothly absorbed.

[Effect of idea]

As detailed above, the fixing part structure of the present invention is
The lining material can be formed simply by tapping or pushing the stud into the stud without having to perform the conventional work of screwing in nuts or hammering in plugs, eliminating the need for nuts or plugs, and making it extremely easy to install the lining material. It can be done more efficiently and is much more economical than conventional methods. Particularly, when constructing a large number of lining materials by fixing each lining material 4 at multiple points, significant labor savings can be achieved. Nevertheless, since the lining material is locked by the engaging part of the stud formed in a serrated shape, the locking part is unlikely to loosen due to vibration, and is sufficient for long-term use under vibration conditions. It will be able to withstand.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a fixing part structure according to an embodiment of the present invention, FIG. 2 is a diagram for explaining the working procedure for forming the above fixing part structure, and FIGS. 3 and 4 are A and B. is a partial cross-sectional view of the stud, Figure 5 is a partial vertical cross-sectional view showing the lining material applied to the hopper, Figure 6 is a partial cross-sectional view showing another construction state of the present invention, and Figure 7 is a conventional fixing part. FIG. 3 is a cross-sectional view showing the structure. 10... Stud, 11... Lining material construction surface, 12... Engaging portion, 14... Lining material.

Claims (1)

[Scope of utility model registration request] A lining in which studs protruding from the construction surface of the lining material are bitten into the lining material, and the lining material is engaged with an engaging portion having a sawtooth cross-sectional shape formed on the outer periphery of the stud. Fixed part structure of the material.