JP6169046B2 - Joint structure between pit frames - Google Patents

Description

  The present invention relates to a joint structure between pit frames that joins pit frames arranged at the opening edge so as to frame the opening edge of the pit.

  A locking groove extending in the longitudinal direction of the pit frame is formed on the side of the pit frame opposite to the pit opening, and the adjacent pit frames are locked so as to straddle between adjacent ends. A coupling structure between pit frames coupled via a joint member that can be inserted into a groove is conventionally known (see Patent Document 1 below).

JP-A-10-8697

  However, in the conventional structure described above, the joint member inserted into the locking groove so as to straddle between the ends of adjacent pit frames at the pit frame manufacturing factory or construction site, and the back plate is applied to the inner surface of the locking groove. Since the bolt was fastened and fixed to the locking groove with the bolt, it was necessary to screw the bolt into the joint member in advance before the work, and the screw processing and the work of installing and tightening the bolt In addition, there is a problem that the work of setting the back plate on the inner surface of the locking groove is troublesome and the work efficiency is poor.

  The present invention has been proposed in view of the above, and an object of the present invention is to provide a joint structure between pit frames that can solve the above-described problems of the conventional structure with a simple structure.

In order to achieve the above object, according to the present invention, a plurality of pit frames arranged in a row along an opening edge of the pit are arranged on the opening edge of the pit, and each pit frame is opposite to the pit opening. A locking groove extending in the longitudinal direction of the pit frame is formed on the side surface, and a joint member that can be attached to the locking groove so as to straddle between adjacent end portions of adjacent pit frames. In the joint coupling structure between pit frames to be coupled, the joint member includes a joint body that can be fitted with a gap in the locking groove, and an elastic member having a base connected to the joint body. with which the elastic member, the elastic force generated by the free end of which can be slidably engaged thereby and elastically deforming the elastic member with the locking groove, the inner surface of the locking groove It is intended for pressing the joint body, before The joint body is composed of a strip-shaped plate material, and has a shallow groove that vertically passes through the joint body on one side surface, and has a ridge portion corresponding to the groove on the other side surface, A first feature is that the base portion and the joint body are coupled to each other in a state where the base portion of the elastic member is fitted in the concave groove so as not to be relatively rotatable .

  According to the present invention, in addition to the first feature, the elastic member made of a leaf spring has a base portion located closer to an end portion of the joint body than a free end portion, and the base portion and the free end portion. The second feature is that the gaps are connected via a raised portion that gradually rises from the base portion toward the free end portion.

Further, according to the present invention, in addition to the first or second feature, the pit frame has a channel formed in a U-shaped cross section by integrally connecting one end of the upper wall portion and the lower wall portion with a vertical wall. A frame portion is integrally provided, and the locking groove is formed by the upper wall portion, the lower wall portion, and the vertical wall, and an opening of the locking groove is formed at each inner end of the upper wall portion and the lower wall portion. A pair of locking claws extending toward each other so as to narrow the portion are integrally connected, and either one of the joint body or the elastic member is connected to the vertical wall, and the other is connected to the pair. A third feature is that each of the locking claws is pressed into contact with each other .

  According to the first feature of the present invention, the joint member is configured such that the joint body is adjacent to each other while the elastic member is elastically deformed by engaging the free end of the elastic member having the base connected thereto with the locking groove. Simply insert it into the locking groove so as to straddle between the adjacent ends of the pit frame, so that the joint body can be brought into pressure contact with the inner surface of the locking groove by the elastic force of the elastic member. The main body can be frictionally connected to both adjacent pit frames (the inner surfaces of the locking grooves), and the pit frames are connected to each other via a joint member. Therefore, not only the structure of the joint member is simplified and the cost is reduced, but also the back plate is not required, and the handling becomes simple and greatly contributes to the improvement of the efficiency of the joint work between the pit frames by the joint member. be able to.

In addition, the joint body is made of a strip-shaped plate material, and has a shallow groove on one side that passes through the joint body on one side, and has a ridge corresponding to the groove on the other side, Since the base portion of the elastic member is fitted in the concave groove so as not to be relatively rotatable, the joint main body made of a strip-shaped plate material has a pair of step portions corresponding to the concave groove and the ridge portion, so that the rigidity strength is increased. In addition, since the concave groove is also used as a detent means for the elastic member, it is possible to contribute to simplification of the coupling structure between the elastic member base and the joint body.

  In particular, according to the second feature, since the elastic member is constituted by a leaf spring, it is easy to manufacture and the cost is reduced. Moreover, this elastic member has a bulge in which the base portion thereof is positioned closer to the end portion of the joint body than the free end portion, and the base portion and the free end portion gradually rise from the base portion toward the free end portion. Therefore, when the joint body is inserted into the locking groove, the free end portion and the raised portion of the elastic member made of a leaf spring are not easily caught by the axial opening end of the locking groove, and workability is improved. Become good.

In particular, according to the third feature, the joint body and the elastic member can be easily and accurately engaged with the vertical wall of the channel frame portion provided in the pit frame and the pair of locking claws facing the channel wall. Therefore, the workability of the joint work between pit frames by the joint member can be further improved .

The perspective view of the pit which shows one Embodiment of this invention 2-2 line enlarged sectional view of FIG. 2 is a cross-sectional view taken along line 3-3 in FIG. 2, showing a joint connection state between adjacent pit frames before placing concrete. Sectional view taken along line 4-4 in FIG. The exploded perspective view which shows the relationship between the adjacent pit frame and joint member in a pit straight line part FIG. 4 is a cross-sectional view corresponding to FIG. 4 showing a joint connection state between adjacent pit frames in the pit corner portion. Exploded perspective view showing the relationship between adjacent pit frames and joint members in the pit corner portion

  Embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

  As shown in FIG. 1, a horizontal walking surface f is formed on the foundation B by placing concrete CR inside or outside the building, and a groove-like pit P is recessed in the walking surface f. Is done. The pit P is used for various purposes as required, for example, for wiring, drainage, and article storage. The opening edge of the pit P is shaped like the opening. A plurality of pit frames F ... are arranged in a row along the opening edge so as to be bordered.

  2 to 7 together, a locking groove extending in the longitudinal direction of the pit frame F is formed on the side surface of each pit frame F opposite to the pit opening O (that is, the side facing the pit peripheral wall). Cg is formed. The adjacent end portions of the adjacent pit frames F are detachably coupled via joint members J and J ′ mounted in the locking grooves Cg so as to straddle between the adjacent end portions. The joint member includes a joint member J corresponding to the straight portion of the pit P and a joint member J ′ corresponding to the corner portion of the pit P.

  Each pit frame F includes a channel frame portion C formed in a U-shaped cross section by integrally joining one end of an upper wall portion Cu and a lower wall portion Cl with a vertical wall Cv, and a vertical direction of the channel frame portion C. The lid mounting frame portion D with the rubber sheet 1 is provided at least integrally with the outer surface of the wall Cv so as to be integrally provided and extending horizontally. Then, a pair of upper and lower locking claws Cuf, Clf extending at the inner ends of the upper wall portion Cu and the lower wall portion Cl toward each other (that is, so as to narrow an opening surface of a locking groove Cg described later). Are integrally connected to each other.

  A pit lid T that closes the upper end opening of the pit P is placed and supported on the upper surface of the lid mounting frame D via the rubber sheet 1, and the upper surface of the pit lid T in the supported state is the walking surface. A part of the walking surface is formed continuously with f.

  Thus, on the inner side surface of the channel frame portion C, that is, the side surface opposite to the pit opening O, the above-mentioned upper wall portion Cu and lower wall portion Cl of the channel frame portion C and a pair of upper and lower locking claws Cuf, Clf. In addition, a locking groove Cg is formed by the vertical wall Cv. Instead of providing such locking claws Cuf and Clf, it is also possible to form the locking groove Cg itself in a so-called dovetail shape in which the groove width gradually narrows toward the open surface.

  A joint member J for connecting adjacent ends of adjacent pit frames F in a straight portion of the pit P is a strip-shaped metal joint body that can be fitted with a clearance in the locking groove Cg. The base Sb is connected to Jm and its joint body Jm, and the tip, that is, the free end Sa is slidable on the inner surface of the locking groove Cg (in the illustrated example, the inner bottom surface, that is, the inner surface of the vertical wall portion Cv). And a pair of elastic members S that can be engaged. The elastic member S has an elastic force generated by engaging the free end portion Sa of the elastic member S with the locking groove Cg and elastically deforming the elastic member S, so that the joint body Jm is connected to the inner surface of the locking groove Cg (see FIG. In the illustrated example, the joint body Jm is frictionally connected to each adjacent pit frame F by being brought into pressure contact with the open end edge of the locking groove Cg, that is, the inner surfaces of the upper and lower locking claws Cuf and Clf. The connecting means for connecting the base Sb of the elastic member S to the joint body Jm is not limited to the rivet 2 in the illustrated example, and can be arbitrarily selected from various connecting means (for example, bolts, welding means, caulking means, adhesive means, etc.). Selectable.

  In the illustrated example, the elastic member S is composed of a leaf spring made of a band plate-like metal (for example, spring steel) having a bent middle portion. That is, the elastic member S has a base Sb positioned closer to the end of the joint main body Jm than the free end Sa, and a space between the base Sb and the free end Sa extends from the base Sb to the free end. It is connected via a raised portion Sm that gradually rises toward Sa (that is, rises obliquely with respect to the joint body Jm so as to be gradually separated from the joint body Jm).

  Further, the joint body Jm made of a strip-shaped flat plate has a shallow concave groove 3 passing through the joint main body Jm on one side, and has a flat ridge 4 corresponding to the concave groove 3 on the other side. Yes. Then, the base Sb and the joint body Jm are coupled to each other in a state where the base Sb of the elastic member S is fitted in the concave groove 3 so as not to be relatively rotatable. Thus, the joint main body Jm made of a strip-shaped plate material has a pair of step portions corresponding to the concave grooves 3 and the convex strips 4, so that the rigidity strength is effectively enhanced, and the concave grooves 3 are elastic members S. Therefore, the connecting structure between the base portion Sb of the elastic member S and the joint body Jm can be simplified.

  Then, with the joint member J set in the locking groove Cg, either the joint body Jm or the free end portion Sa of the elastic member S placed in an elastically deformed state (the latter in the illustrated example). Sa) is in pressure contact with the inner surface of the vertical wall Cv of the channel frame portion C, and one of them (the former Jm in the illustrated example) is in pressure contact with the inner surfaces of the upper and lower locking claws Cuf and Clf. As a result, the adjacent pit frames F are connected to each other through the joint members J frictionally connected to the pit frames F. 4 and 6 indicate the elastic member S in a free state.

  Contrary to the illustrated example, the free end portion Sa of the elastic member S is brought into pressure contact with the open end edge of the locking groove Cg, that is, the inner surfaces of the upper and lower locking claws Cuf and Clf, and the joint body Jm is connected to the channel frame portion. It is also possible to press contact with the inner bottom surface of the vertical wall Cv of C. In this case, the width of the free end portion Sa of the elastic member S is set to the interval between the upper and lower locking claws Cuf and Clf (that is, the locking groove). It is necessary to set it sufficiently wider than the width of the open surface of Cg.

  Further, a mark m indicating an appropriate insertion position of the joint member J into the locking groove Cg of one pit frame F is attached to the upper side surface of the joint body Jm. The mark m is attached to the one pit. By matching with the end face of the frame F, the amount of insertion of the joint member J into the locking groove Cg can be easily optimized.

  Further, the joint member J ′ for connecting adjacent ends of adjacent pit frames F in the corner portion of the pit P has a strip-like shape that can be fitted with a clearance in the locking groove Cg. The basic structure is the same as that of the straight joint member J except that the metal joint body Jm is bent in an L shape corresponding to the corner portion of the pit P. Therefore, regarding this joint member J ′, only the reference numerals of the corresponding components of the straight joint member J are attached to the components, and a specific structural description is omitted. In addition, adjacent end faces of adjacent pit frames F in the corner portion of the pit P are cut at an angle of 45 degrees with respect to the longitudinal direction of the pit frame F so as to correspond to the corner shape of the pit P.

  Next, the operation of this embodiment will be described.

  In constructing the pits P, a plurality of pit frames F are connected to each other in accordance with the completed form of the pits P, and a pit frame assembly is assembled in advance. In this case, in the straight part of the pit P, the pit frames F arranged in a row are connected to each other via the joint member J for the straight part, and in the corner part of the pit P, the pit frames F are orthogonal to each other. Are coupled via a corner joint member J '.

  Next, the pit frame assembly assembled as described above is positioned and held at a desired level from the base B using a jig (not shown), and then the pit frame assembly whose level is adjusted and positioned is not shown. It fixes on the foundation B via an anchor member and a support | pillar. After that, the walking surface f with the pit P is formed by placing and solidifying the concrete, and the pit frame F is installed along the opening edge of the pit P together with the forming.

  By the way, in the joining operation between the pit frames F as described above, the joint members J and J ′ are connected to the free end portions Sa of the elastic members S made of a pair of leaf springs to which the base portion Sb is fixed. While the elastic member S is elastically deformed by engaging with the inner surface of the locking groove Cg (in the illustrated example, the groove bottom surface, that is, the inner surface of the vertical wall Cv), the joint body Jm is connected to the adjacent end of the adjacent pit frame F. All that is required is to simply slide it into the locking groove Cg so as to straddle between the parts. The joint body Jm that receives the elastic force from the elastic member S during the insertion inserts the inner surface of the locking groove Cg (in the illustrated example, the open end edge of the locking groove Cg, that is, the inner surfaces of the locking claws Cuf and Clf). Slide in pressure contact.

  Thus, the elastic force of the elastic member S allows the joint body Jm to be pressed against the inner surface of the locking groove Cg, so that the joint body Jm is frictioned against the inner surfaces of the locking grooves Cg of the adjacent pit frames F. The two pit frames F can be connected via the joint members J and J ′. Therefore, the joint members J and J ′ are simplified in structure and cost-saving as compared with the conventional joint member, and the work of setting the back plate in the locking groove Cg is also unnecessary. The handling becomes simple and the efficiency of the joining work between the pit frames F by the joint members J and J ′ can be improved.

  In particular, the elastic member S is made of a leaf spring as shown in the example of the drawing, so that it becomes easy to manufacture and cost saving is achieved. Moreover, the elastic member S has a base Sb positioned closer to the end of the joint body Jm than the free end Sa, and the space between the base Sb and the free end Sa extends from the base Sb to the free end Sa. Are connected via a raised portion Sm that rises obliquely toward the upper surface, and therefore when the joint body Jm is inserted into the locking groove Cg, the free end portion Sa and the raised portion Sm of the elastic member S made of a leaf spring are formed. It becomes difficult to get caught in the axial opening end of the locking groove Cg, and the workability is further improved.

  The embodiment of the present invention has been described above, but the present invention is not limited to the embodiment, and various embodiments are possible within the scope of the present invention.

  For example, the cross-sectional shape of the pit frame F is not limited to that of the embodiment, and various cross sections having a locking groove Cg in which the joint members J and J ′ can be mounted at least on the side surface opposite to the pit opening. Shaped formwork can be used.

  In the above embodiment, the pit P is formed by casting concrete. However, in the present invention, the pit is constructed by installing a duct (pit forming member) having a groove-like recess on the foundation. Can also be implemented.

  Moreover, in the said embodiment, what showed the lid mounting step part D integrally provided in the predetermined part of the channel frame part C with the locking groove Cg of the pit frame F was shown, However, In this invention, a lid mounting step part was abbreviate | omitted. Alternatively, the position of the lid mounting step may be changed as appropriate.

C: Channel frame portion Cg ... Lock groove Cl ... Lower wall portion Cu ... Upper wall portion Cuf, Clf ... Pair of lock claws Cv ... Vertical Wall F ... Pit frame J ... Joint member J 'corresponding to the straight part of the pit frame ... Joint member Jm corresponding to the pit frame corner part ... Joint body O ... ··· Pit opening P ··· Pit S ··· Plate spring Sa as an elastic member ··· Tip portion Sb as a free end ··· Base Sm ··· Raised portion 3 ··· ······················ 4

Claims (3)

A plurality of pit frames (F) arranged in a row along the opening edge are arranged at the opening edge of the pit (P), and each pit frame (F) is opposite to the pit opening (O). A locking groove (Cg) extending in the longitudinal direction of the pit frame (F) is formed on the side surface, and the locking groove (Cg) extends between adjacent pit frames (F). In the joint structure between the pit frames, which are connected through the joint members (J, J ′) that can be mounted,
The joint member (J, J ′) has a joint body (Jm) that can be fitted with a clearance in the locking groove (Cg), and a base (Sb) connected to the joint body (Jm). An elastic member (S),
The elastic member (S) has a free end (Sa) slidably engaged with the locking groove (Cg) and elastic force generated by elastically deforming the elastic member (S). The joint body (Jm) is pressed against the inner surface of the locking groove (Cg) ,
The joint body (Jm) is formed of a strip-shaped plate material, and has a shallow groove (3) vertically passing through the joint body (Jm) on one side and the groove (3) on the other side. And the base portion (Sb) in a state in which the base portion (Sb) of the elastic member (S) is fitted in the concave groove (3) so as not to be relatively rotatable. And a joint structure between pit frames, wherein the joint body (Jm) is coupled .   The elastic member (S) made of a leaf spring has a base (Sb) positioned closer to the end of the joint body (Jm) than the free end (Sa), and the base (Sb) and the free end. The portion (Sa) is connected to the portion (Sa) via a raised portion (Sm) that gradually rises from the base portion (Sb) toward the free end portion (Sa). Joint structure between pit frames.   The pit frame (F) has a channel frame portion (C) formed in a U-shaped cross section by integrally connecting one end of an upper wall portion (Cu) and a lower wall portion (Cl) with a vertical wall (Cv). ), And the upper groove (Cg) is formed by the upper wall (Cu), the lower wall (Cl), and the vertical wall (Cv), and the upper wall (Cu) and the lower wall A pair of locking claws (Cuf, Clf) that extend toward each other so as to narrow the opening of the locking groove (Cg) are integrally connected to each inner end of the portion (Cl), One of the joint body (Jm) and the elastic member (S) is in pressure contact with the vertical wall (Cv), and the other is in pressure contact with the pair of locking claws (Cuf, Clf). The joint structure between pit frames according to claim 1 or 2, characterized in that

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