JP3573077B2 - Grating slip prevention device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grating slippage prevention device for covering a groove or the like.
[0002]
[Conventional technology and its problems]
The grooves are covered with a grate-like grating to allow vehicles to pass. 1 and 2 are drawings showing an embodiment of the present invention, and the prior art will be described with reference to these drawings. Reference numeral 1 denotes a groove made of concrete, in which vertical walls of inner walls 2 and 2 and upper surfaces 3 and 3 are formed. Reference numeral 4 indicates the entire grating, and left and right frame members 5 and 5 are made of a member having an L-shaped cross section made of iron, and the frame members are composed of vertical members 5a and 5a and horizontal members 5b and 5b. A large number of horizontal lattices 7 are welded between the vertical members 5a, 5a in the width direction of the groove 1. The two vertical grids 8 are welded to the horizontal grid 7 in the longitudinal direction of the groove.
[0003]
Such a grating 1 is used in a state where the vertical members 5a, 5a are inserted into the grooves 1, and the horizontal members 5b, 5b are placed on the upper surfaces 3, 3. Since the grating 1 may be removed to clean the grooves, gaps 9 are provided between the vertical members 5a, 5a and the inner walls 2, 2, as is apparent from FIG. is there.
[0004]
By the way, when such a grating is used for an inclined groove, a problem of “position shift” occurs. FIG. 2 is a plan view, but if, for example, there is a slight inclination such that the lower side of the figure becomes lower, the grating will be displaced below the figure. This is because if the vehicle passes many times, the entire grating will be bent and deformed, or if pebbles or sand particles are interposed between the cross members 5b, 5b and the upper surfaces 3, 3, the tire load will be repeated. Each time the grating acts, the grating moves in a “squashed” manner, and at that time, it slightly shifts. Further, if small stones or the like are interposed as described above, there is a problem that loud noise is generated when the tire passes.
[0005]
[Means to solve the problem and its operation]
The present invention has been made by focusing on the above-mentioned problems. That is, the fixed shaft is composed of left and right shaft portions, a screw shaft connected to one shaft portion, and a hollow shaft connected to the other shaft portion, and the screw shaft is screwed into a female screw provided on the inner surface of the hollow shaft. The hollow shaft has a hexagonal cross section for applying a tool, and the rotating part attached to the screw shaft has a hexagonal cross section for applying a tool, and is welded in a state in which it extends downward to a grating vertical member. A through hole is made in the locking piece, and the shaft part is penetrated through this hole, and by turning the screw shaft, the total length of the fixed shaft is lengthened and both ends of the shaft part are strongly pressed against the inner wall of the groove. It is a device for preventing displacement of grating. Since the fixed shaft penetrates the locking piece welded to the frame material and is pressed against the inner wall of the groove, vertical movement and displacement of the grating at the penetrating portion are suppressed.
[0006]
Further, the fixed shaft is configured such that a pressing force against the inner wall of the groove is generated by the screw shaft and the hollow shaft into which the screw shaft is screwed. As described above, since a so-called screw shaft structure is employed, a strong pressing force is obtained, and the grating is firmly supported.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the illustrated embodiment will be described. Since the structure of the grating itself has already been described, the description is used here. The fixed shaft 10 includes left and right shaft portions 11, 11, a bolt shaft 12 connected to one shaft portion 11, and a hollow shaft 13 connected to the other shaft portion 11. The female screw is cut. The screw shaft 12 is screwed into a female screw in the hollow shaft 13. The hollow shaft 13 has a hexagonal cross section as shown in FIG. 6 so that a tool can be used. A hexagonal rotating part 14 is also attached to the screw shaft 12, and a tool can be applied to this part.
[0008]
A locking piece 15 made of a thick steel plate is welded to the longitudinal members 5a, 5a in such a manner that the locking piece 15 is extended downward, and a shaft portion 11 penetrates a through hole 16 formed there. FIG. 3 shows this penetrating state, in which the diameter of the through hole 16 is set larger than that of the shaft portion 11, and the lower side of the shaft portion 11 is brought into contact with the inner surface of the through hole 16 as shown in the figure. is there. By doing so, the upward movement of the grating 1 is restricted. Reference numeral 17 indicates a welded portion of the locking piece 15.
[0009]
The procedure for using the slip stopper according to the present invention will be described. The shaft portions 11, 11 of the fixed shaft 10 are passed through the through holes 16, 16 of the locking pieces 15, 15 in advance. At this time, the total length of the fixed shaft 10 is set shorter than the interval between the inner walls 2 and 2. Next, the grating 1 is inserted into the groove 1, and the cross members 5b, 5b are brought into close contact with the upper surfaces 3, 3. Then, when a screw such as a spanner is applied to the hollow shaft 13 and the rotating portion 14 and the screw shaft 12 is turned, the total length of the fixed shaft 10 gradually increases, and finally, both ends of the shaft portions 11, 11 are attached to the inner walls 2, 2. It is pressed strongly.
[0010]
When the grating is restrained by the fixed shaft 10, it is advantageous that the shaft portion 11 comes into contact with the lower side of the through hole 16 as shown in FIG. By doing so, the cross members 5b, 5b adhere to the upper surfaces 3, 3, and the entire grating 4 is completely restrained. For this purpose, after the positional relationship as shown in FIG. 3 is established, the screw shaft 12 is turned to press the shaft portions 11, 11 against the inner walls 2, 2. Further, even if the upper surfaces 3 and 3 of the grooves are inclined, the displacement is reliably prevented.
[0012]
In the embodiment of FIG. 4, an L-shaped notch 18 is formed in the locking piece 15 instead of the through hole 16 described above. In this case, the floating of the grating 4 cannot be restrained, but a fixed shaft is firmly erected between the inner walls 2 and 2 in advance, and the grating is fitted therein while the notch 18 is being fitted thereto. In this case, since the shaft portion 11 is matched to the position as shown in FIG. 4, the displacement of the grating is reliably prevented. In addition, it is easy to make the notch 18 coincide with the shaft portion 11 from the viewpoint of work.
[0013]
The notch 19 in the embodiment of FIG. 5 has a shape in which the L-shaped notch 18 is stopped and the through hole 16 is opened rightward. In this case, the floating of the grating is reliably restrained by bringing the shaft portion 11 into contact with the lower side of the notch 19. Further, it is possible to prevent the grating 4 from shifting to the right in FIG. Therefore, it is preferable to open the notch 19 on the lower side of the groove upper surfaces 3 and 3.
[0014]
In the embodiment of FIG. 7, the tubular member 20 is welded while penetrating the vertical member 5a, a female screw is cut into the tubular member, and a fixing bolt 21 corresponding to a fixed shaft is screwed into the female member. With the bolt 21 retracted, the grating 4 is fitted into the groove, and then the fixing bolt 21 is tightened, whereby the tip of the fixing bolt 21 bites into the inner wall 2 and the grating is fixed. The cylindrical member 20 of this embodiment corresponds to the hollow shaft 13 described above. Note that the structure as shown in FIG. 7 is desirably arranged symmetrically, but may be arranged on one side.
[0015]
【The invention's effect】
The present invention is configured such that the fixed shaft penetrates the grating frame material or the engaging piece joined thereto and presses against the inner wall of the groove. Since the fixed shaft penetrates the frame member or the locking piece and is pressed against the inner wall of the groove, vertical movement and displacement of the grating in the penetrating portion are suppressed. Since the grating is constrained by the fixed shaft, even if a load of the vehicle is applied or the upper surface of the groove is inclined, no displacement of the grating occurs and generation of noise can be prevented. It is also effective in preventing theft.
[0016]
The fixed shaft is configured such that the bolt shaft and the hollow shaft into which the bolt shaft is screwed generate a pressing force against the inner wall of the groove. As described above, since a so-called screw shaft structure is employed, a strong pressing force is obtained, and the grating is firmly supported. Further, since the fixed shaft is thin, it does not take up much space.
[Brief description of the drawings]
FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.
FIG. 2 is a plan view of that of FIG.
FIG. 3 is a sectional view taken along line (3)-(3) of FIG. 1;
FIG. 4 is a partial side view showing a modification of a locking piece.
FIG. 5 is a partial side view showing a modification of a locking piece.
FIG. 6 is a sectional view taken along line (6)-(6) of FIG. 1;
FIG. 7 is a partial vertical sectional front view showing another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Fixed shaft 4 Grating 5 Frame material 15 Locking piece 1 Groove 2 Inner wall 12 Bolt shaft 13 Hollow shaft

Claims (1)

The fixed shaft is composed of a left and right shaft portion, a screw shaft connected to one shaft portion, and a hollow shaft connected to the other shaft portion, and the screw shaft is screwed into a female screw provided on the inner surface of the hollow shaft, The hollow shaft has a hexagonal cross section for applying a tool, and the rotating part attached to the screw shaft has a hexagonal cross section for applying a tool, and is welded to a grating vertical member while extending downward. By drilling a through hole in the stop piece, penetrating the shaft through this through hole, and turning the screw shaft, the total length of the fixed shaft is lengthened, and both ends of the shaft are strongly pressed against the inner wall of the groove. Grating slip prevention device.

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