JP3052191B2 - Manufacturing method of grating - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the production of gratings.
It is about the method .

[0002]

2. Description of the Related Art Conventionally, a grating serving as a cover for a gutter on a road or the like is constructed as shown in an exploded view in FIG. 4, and a plurality of main members 51, 51, 51 are respectively formed in a penetrating manner. A horizontally elongated deformed through hole 51a is formed,
An auxiliary bar 52 is inserted into each of the through holes 51a from the side.
52a are formed, the main members 51 are fitted into the respective engagement recesses 52a, the pitch between the main members 51 is set to a predetermined pitch, and the main members 51 are welded to the auxiliary bar 52. And connected to each other,
Thereafter, an end plate 53 is welded and fixed, and end bars 54 and 55 are further welded and fixed to the side surfaces.

In the conventional structure shown in FIG. 4, it is necessary to form the engaging recesses 52a, 52a in the auxiliary bar 52 in advance, and to fix the main members 51 to the auxiliary bar 52 by welding. Therefore, there is a problem that the number of manufacturing steps is large and the cost is high.
It is necessary that a is formed to have a considerably large width, and therefore, there is a problem that rattling is likely to occur.

FIG. 5 shows another conventional grating structure. In FIG. 5, an auxiliary pipe 53 is inserted into a plurality of main members 51 through a through hole 51b. The auxiliary pipe 53 and the main members 51 are connected by welding. Even with such a structure using the auxiliary pipe 53, the auxiliary pipe 53 and the main members 51 need to be welded. There was a problem of becoming high.

[0005]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above-mentioned conventional problems, and has a grating capable of reducing the cost and connecting and fixing the main members at a good pitch interval.
The purpose of that does not provide a method of manufacturing, the gist is, where
Between each fixed block arranged at a fixed pitch interval
Insertion groove is formed, while matching with each fixed side block
Each of the pressing blocks slidably arranged at the position
An insertion groove is also formed between the locks,
Attach the lock and press block to the press
Insert the main member from above into the insertion groove of the block and pressing block.
Insert and arrange the main members in parallel at a predetermined pitch interval,
In this state, the inside of the hole formed through each main member
Through the auxiliary pipe and press the pressing block
And press the auxiliary pipe up to the fixed block side.
A long flat cross section below, and each of the above
That is, the main members are connected and fixed at predetermined pitch intervals .

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective configuration diagram of the grating of the present example. The grating 1 is composed of a plurality of plate-shaped main members 2, 2, and 2.
The main members 2 are arranged in parallel with each other, are connected and fixed at a predetermined pitch by an auxiliary pipe 5, and an end plate 3 is welded to a longitudinal edge portion by welding. End bars 4a and 4b are fixed by welding to both side edges, respectively.

[0007] The end bars 4a, 4 on both side surfaces.
The grating 1 without b may be used. In this example, the main members 2, 2, 2 are connected and fixed to the auxiliary pipe 5 without welding. That is, the auxiliary pipe 5 is inserted into a round hole 2a formed through each main member 2 and then pressed from the lateral direction to be flattened as shown in the enlarged view of FIG. .

FIG. 3 is a perspective view showing an example of the manufacturing process of the grating 1. In FIG. 3, a plurality of fixed blocks 6, 6, 6 are arranged at a predetermined pitch. Insertion grooves M, M, M into which the main member 2 can be inserted from above are formed between them. On the other hand, pressing blocks 7, 7, 7 that can slide with respect to the fixed blocks 6 are arranged at positions matching the fixed blocks 6, and the main member 2 is inserted between the pressing blocks 7, 7. The insertion groove M is formed.

In this manner, the fixed block 6 and the pressing block 7 are attached to the press machine, and in this state, the insertion groove M
When the main members 2, 2, 2, 2 are respectively inserted into the inside, the main members 2, 2, 2, 2 are arranged in parallel at a predetermined pitch interval, and in this state, the main members 2, 2, 2, 2 are formed to penetrate the main member 2 respectively. The auxiliary block 5 having a circular cross section is inserted from the side into the round hole 2a, and the pressing block 7 is inserted with the auxiliary pipe 5 inserted so as to connect all the main members 2, 2, 2. , 7, 7 are pressed against the fixed blocks 6, 6, 6 using, for example, an 80-ton press, so that the fixed blocks 6, 6, 6 and the pressing blocks 7, 7, 7 The auxiliary pipe 5 has a flat shape as shown in an enlarged manner in FIG.

In the auxiliary pipe 5, a circular portion corresponding to the inner periphery of the round hole 2a is fixed at a portion 5a located in the round hole 2a of the main member, but the other portion is fixed to the fixed side block 6 as described above. Is pressed and sandwiched between the pressing block 7 and a vertically long flat cross section. The side surface side is a substantially vertical pressing plane 5b where the fixed side block 6 and the pressing block 7 abut, and the upper side of the pressing plane 5b is The upper swelling surface 5c is swelled upward, and the upper swelling surface 5c is located above the round hole 2a, and the lower swelling surface 5d is located below the round hole 2a. As a result, the main members 2 and 2 are fixed and connected and fixed in parallel at a predetermined pitch via the auxiliary pipe 5. Therefore, unlike the related art, there is no need to fix the auxiliary pipe 5 and each of the main members 2 by welding. 2, 2 can be connected at a predetermined pitch interval.

As described above, in this embodiment, the auxiliary pipe 5 is provided by using the plurality of fixed blocks 6 and the plurality of pressing blocks 7.
Of the auxiliary pipe 5 is swelled upward and downward by pressing the side surface of the auxiliary pipe 5 upward and downward, whereby the main members 2 and 2 can be firmly fixed at a predetermined pitch, and the manufacturing process is simplified. Thus, the grating can be manufactured at a reduced cost. As described above, after that, as shown in FIG.
It is also possible to form a framework by fixing a and 4b by welding. In this example, each main member 2 has a round hole 2.
a, and the auxiliary pipe 5 has a circular cross section, but may have a shape other than a circle.

The main member 2 can be inserted one by one into each of the insertion grooves M shown in FIG. 3 to manufacture a grating 1 with a coarse pitch between the main members 2 and 2.
By inserting the main member 2 into the insertion groove M at the jump interval, grating with a larger pitch interval between the main members 2 can be manufactured, and the pitch interval between the main members 2 and 2 can be set freely. In addition, since the side surface of the auxiliary pipe 5 is pressed and flattened and the plurality of main members 2 and 2 are connected and fixed in this manner, the rattling 1 is produced in the longitudinal direction after the manufacturing without any backlash. Even if cut, each main member 2,
2 is not disassembled, and the grating 1 can be cut and dimensioned as required.

[0013]

Method of manufacturing a grating of the present invention, according to the present invention is, where
Between each fixed block arranged at a fixed pitch interval
Insertion groove is formed, while matching with each fixed side block
Each of the pressing blocks slidably arranged at the position
An insertion groove is also formed between the locks,
Attach the lock and press block to the press
Insert the main member from above into the insertion groove of the block and pressing block.
Insert and arrange the main members in parallel at a predetermined pitch interval,
In this state, the inside of the hole formed through each main member
Through the auxiliary pipe and press the pressing block
And press the auxiliary pipe up to the fixed block side.
A long flat cross section below, and each of the above
By connecting and fixing the main members at a predetermined pitch interval, there is no need to weld and fix each main member and the auxiliary pipe one by one as in the related art, thereby simplifying the manufacturing process and reducing the cost to manufacture grating . Can be done.
Also, insert the main member one by one into each insertion groove,
Manufactures coarse gratings with pitch spacing between main components
Insert the main member into the insertion groove at two jump intervals
Gratings with a wider pitch between main members
The pitch interval of the main member can be set freely.
Will be able to Press the side of the auxiliary pipe to bias it.
It is made flat and connects and fixes a plurality of main members.
It does not rattle, and it can be
Even if the lacing is cut, the main members do not decompose.
Cut the grating as necessary to set the dimensions.
It has the effect that can be.

[Brief description of the drawings]

FIG. 1 is a perspective configuration diagram of a grating according to the present embodiment.

FIG. 2 is an enlarged perspective view of a main part of a flat auxiliary pipe in FIG. 1;

FIG. 3 is a configuration perspective view of a fixed block and a pressing block for manufacturing the grating of FIG. 1;

FIG. 4 is an exploded configuration diagram of a conventional grating.

FIG. 5 is an exploded configuration diagram of still another conventional grating.

[Explanation of symbols]

 Reference Signs List 1 grating 2 main member 2a round hole 3 end plate 4a, 4b end bar 5 auxiliary pipe 5b pressing plane 5c upper bulging surface 5d lower bulging surface 6 fixed block 7 pressing block M insertion groove

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 53-24151 (JP, U) Japanese Utility Model Sho 61-11816 (JP, U) Japanese Utility Model Hei 6-56191 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) E03F 5/06 B21D 39/06

Claims (1)

(57) [Claims] 1. A plurality of fixed members arranged at a predetermined pitch interval
Insertion grooves M, M are formed between the side blocks 6, 6, and
On the other hand, slide
Between the pressing blocks 7, 7 arranged so as to be able to move the guide
Insertion holes M, M are also formed in the fixed side block.
6 and press block 7 are attached to the press
The main member is inserted into the insertion groove M of the side block 6 and the pressing block 7.
Insert the main member 2, 2, 2 by inserting 2, 2, 2 from above.
The main members are arranged in parallel at a constant pitch.
The holes 2a formed through the holes 2, 2, and 2 are supplemented in the holes 2a.
The auxiliary pipe 5 is inserted, and the pressing blocks 7, 7, 7 are
Press to the fixed block 6, 6, 6 side with a press machine,
The auxiliary pipe 5 has a flat cross section that is long in the vertical direction.
Each of the main members 2, 2, 2 is set at a predetermined pitch via an auxiliary pipe 5.
Grating characterized by being fixedly connected at intervals
Construction method .