JP3270424B2 - Grating spacer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grating spacer which is used to prevent "rattle" when grating laid on an upper portion of a lateral groove or the like "rattles" with respect to the lateral groove or the like. is there.

[0002]

2. Description of the Related Art Grating, which is laid as a side gutter or crossing ditch of a road, or a passage plate for a passage in a factory, etc., is a method of supporting a traffic load on the upper surface by arranging strips having a vertical strip width at a fine pitch. The "bearing bar" has a rectangular lattice shape that forms the main part, and is used by placing both side portions of the bearing bar on the receiving portion above the side gutter and crossing groove of the road and covering the upper side of the gutter and crossing gutter. Is done.

[0003] However, the grating mass-produced in the factory has a welding integrated structure of "a side bar on both sides of the bearing bar and a connecting bar for connecting and fixing the bearing bar in a side-by-side attitude", and is provided on a receiving portion such as a side groove. Since the lower surfaces of the both sides to be placed are not machined, there is a case where the relative surface between the upper surface of the receiving portion of the gutters and the lower surfaces of both sides of the grating does not fit and causes "rattle". In such a case, a separate spacer is inserted between the upper surface of the receiving portion and the lower surface of the grating in the laid state to take measures to "prevent rattling".

[0004]

However, the above-mentioned "rattle prevention means" of the conventional grating has the following drawbacks. That is, it is not possible to measure in advance the fit between the lower surface of the individual gratings and the upper surface of the receiving portion of the gutters before laying, so that after the laying of the grating, it is checked whether "rattle" exists or not. Check it, and besides, it is not possible to insert the spacer through the narrow gap of the bearing bar of the installed grating and insert and set it in the play between the lower surface of the grating and the upper surface of the receiving part, so remove the grating once laid. Therefore, it is indispensable to perform the work of disengaging the grating for laying the spacer again on the upper surface of the receiving portion.

[0005] Furthermore, the above-mentioned recognition of the presence of "gap" in the grating after the laying is performed by estimating the approximate amount of the "gap" by only estimating the approximate position of the jigging point. There is a problem that the spacer thickness and the set point of the spacer cannot be specified beforehand.
In many cases, "other rattling due to inadequate spacers" occurs, and in many cases, grating is removed many times and trial and error is repeated to eventually prevent rattling. It takes a lot of trouble and time.

The present invention provides a grating spacer which solves the above-mentioned disadvantages of the prior art.

[0007]

The grating spacer according to the present invention which solves the above technical problem is described as follows. A wedge-shaped spacer to be inserted into the clearance between the upper surfaces of the receiving portions, the spacer has a tapered shape gradually increasing from the front to the rear, and upper and lower surfaces are provided with retaining projections for preventing the tapered direction from falling off, Furthermore, a structure is provided in which an operation bar connecting portion for detachably connecting the operation bar is provided at a rear end portion of the front surface.

In other words, the grating spacer of the present invention, when it is recognized that "rattle" is present in the grating laid in the gutters, connects the spacer to the operating bar to connect the gap between the laid bearing bars. From the back side of the grating, insert the tip of the spacer into the gap that produces "chatter", position it, and hit the rear end of the spacer with an appropriate tool in that state to drive it into the gap. After confirming "Resolution", the spacer is inserted and set, and thereafter, the operation bar is removed and only the spacer is interposed and fixed between the lower surface of the grating and the upper surface of the receiving portion of the side grooves.

[0009] The connecting portion of the operation bar may be in the form of a nut for screwing and connecting a bolt at the lower end of the operation bar, or
The tapered portion at the lower end of the operation bar is forcibly inserted into a connection hole form for connection and disconnection. The spacer having the operation bar connecting portion is formed of a hard resin plate or a metal plate of aluminum or the like having substantially the same durability as the grating.

[0010]

The above-described grating spacer of the present invention can be inserted into the gap between the bearing bars of the installed grating and can be inserted and set under the installed grating. Eliminates the need for difficult grating removal work. Then, it is possible to sequentially insert and insert the tapered spacer while confirming the degree of reduction of “rattle” by temporarily inserting the tip of the spacer, and operate even if an over-improper defect occurs. Since it can be pulled back by the bar, the conventional troublesome trial and error is not required at all, and the extremely effective spacer insertion can be accurately performed in a short time.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description will be given based on embodiments. First, FIG. 1 shows a grating spacer 10 (hereinafter simply referred to as a spacer 10) according to an embodiment of the present invention.
Referring to FIG. 2, the spacer 1 includes a “bearing bar 2 arranged side by side at a fine pitch with the band width direction being vertical, and a connecting bar 3 fixed across the upper end of the bearing bar 2 in the side-by-side posture. The grating 1 comprising side plates 4 welded to both sides of the bearing bar 2 is continuously laid by fitting both sides of the grating 1 to the receiving portions 6 of the step-shaped shelf recessed at the upper end of the U-shaped side groove 5. In the laying state, a spacer for preventing "rattle" of the grating 1 due to a play C generated between the upper surface 7 of the receiving portion 6 and the lower surface 8 on both sides of the grating 1 in the following configuration: have.

That is, the spacer 10 is a rectangular plate-shaped wedge made of hard resin, and has a tapered shape in which the long side direction of the rectangle is the front-rear direction and gradually increases from the front end to the rear end. slip to prevent the longitudinal direction of the slip on the bottom surface and
A non-slip protruding portion 11 made of a ridge (or a knurl) is provided, and a nut portion 12 on which a male screw portion 14 at the lower end of a separate operation bar 13 can be detachably screwed and connected is provided on the upper surface near the rear end edge. Is provided, and the nut portion 12 is an operation bar connecting portion of the above-mentioned constituent requirements. Note that the spacer 10 of this embodiment is a rectangle having a size of approximately 60 mm × 40 mm, and the dimensions of the front end portion thickness T1 = about 2 mm and the rear end portion thickness T2 = about 10 mm. In a later-described insertion set, it is set at a point slightly displaced from the spacer center line 15 in order to facilitate insertion under the bearing bar 2 of the grating 1 . And operation bar 1
3 is a bar material having a length of about 20 to 30 cm.

The above spacer 10 is used in the following manner. That is, the operation bar 13 is connected to the nut portion 12 to prepare it, and the grating 1 is laid in the side groove 5, and the existence of “rattle” is recognized, and the upper surface 7 of the receiving portion 6 and the lower surface 8 on both sides of the grating 1 are recognized. Is confirmed, the spacer 10 with the operation bar 13 is inserted through the gap between the bearing bars 2 and the tip of the spacer 10 is inserted into the clearance C. Temporary insertion is performed, and after that, an appropriate tool (not shown) is inserted through the gap between the bearing bars 2 and the rear portion of the spacer 10 is beaten and sequentially inserted.

Then, while confirming the decrease of "chatter" of the grating 1 by sequentially proceeding with the above-mentioned forced insertion, the forcible insertion is advanced and the state of "chatter" is zero, and the spacer 10 is fully inserted and fixed. At the same time, the operation bar 13 is removed from the spacer 10 that is fully inserted, and the grating 1 is set and fixed in a normal laid state. Although the spacer 10 of the above-mentioned size generally has the entire length on the receiving portion 6 in the normal insertion state, the play space C
When the protrusion slightly protrudes from the receiving portion 6 due to the amount of the protrusion, an appropriate cutting tool can be inserted from between the bearing bars 2 to cut off and remove the protruding portion.

The spacer 10 of the above-described embodiment has the above-described function, and it is possible to prevent the rattling of the laid state without removing the grating 1 from the side groove 5 while the laid state is maintained. Since the attitude of the spacer 10 can be maintained by the operation bar 13 during the above-mentioned forcible insertion beating operation, there is very little possibility that the attitude of the spacer 10 collapses even if there is a hit mistake by the tool. Even if the spacer 10 is displaced sideways due to a hit mistake, the posture can be easily corrected, so that the work of inserting and setting the spacer 10 is particularly easy and accurate.

Next, a spacer 10 according to another embodiment of the present invention will be described with reference to FIG. The spacer 10 shown in FIG. 3 has a large width W that can be inserted into the lower side between two adjacent bearing bars 2, and an operation bar 13 </ b> A made of a straight and bendable flexible tube is attached to and detached from the nut portion 12. It is composed of a combination with a flexible operation bar 13A that is freely connected, and has a form used as follows.

That is, the flexible operation bar 13A is connected to the spacer 1
0, a bending posture is set, and the wide spacer 10 is parallel to the bearing bar 2 so as to be inserted from a gap between the bearing bars 2. 10
Is set parallel to the lower surface 8 of the grating 1 and temporarily inserted and set. Hereinafter, the spacer 10 is fully inserted by the same method as that of the embodiment of FIG. 1 to prevent "rattle". In the embodiment shown in FIG. 3, the wide spacer 10 can be inserted and set, and when the distance between the bearing bars 2 is small, the spacer 10 can be inserted and set.

The spacer 10 of the present invention is not limited to the above-described embodiment. Instead of the nut portion 12, the operation bar connecting portion having a simple hole shape sufficient to press-fit the tip of the operation bar 13 to hold the spacer 10. Further, in the case of grating having a side bottom plate joined to the receiving portion 6 of the side groove 5, the grating is inserted and set between the lower surface of the bottom plate and the upper surface 7 of the receiving portion 6.

[0019]

As described above, the grating spacer of the present invention provides a "measure for preventing rattling" of grating.
It can be done in the laid state without any trouble, and it can be done very efficiently and efficiently. There are useful effects rich in practicality as described above.

[Brief description of the drawings]

FIG. 1 is a perspective view of a grating spacer according to an embodiment of the present invention.

2 (A) is a perspective view, and FIG. 2 (B) is a side view showing a use state of the grating spacer of the embodiment of FIG. 1;

3A and 3B show a grating spacer according to another embodiment of the present invention, wherein FIG. 3A is a perspective view thereof, and FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 grating 2 bearing bar 3 connecting bar 4 side bar 5 side groove 6 receiving part 7 upper surface of receiving part 8 lower surface of both sides of grating 10 grating spacer 11 retaining projection 12 nut part 13 operation bar

Claims (1)

(57) [Claims] 1. A wedge-shaped spacer to be inserted into a clearance between the lower surface of both sides of the grating and the upper surface of the receiving portion, the left and right sides being placed and set on the receiving portion of the gutters. Has a taper shape that gradually increases from the front to the rear, has a retaining projection on the upper surface and the lower surface for preventing the taper direction from coming off, and further includes an operation bar connecting portion that detachably connects the operation bar to a front rear end portion. A grating spacer characterized by the structure provided in.