JPH044048Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose of the invention" a. Industrial application field The present invention relates to a closing lid for an underground frame, and is characterized in that the closing lid is positioned at a predetermined position and fitted into the lid receiving frame. It is something to do.

b. Prior art The idea related to Utility Model Application No. 54-131467 (Japanese Utility Model Publication No. 55-44896) displays an arrow on the top surface of the lid receiving frame, and also displays an arrow on the surface of the closing lid that fits into the lid receiving frame. The flow direction of the fluid flowing through the underground frame installed at the bottom of the lid receiving frame is clearly indicated by aligning both arrows. In order to align the arrows of the closing lid, a chevron-shaped projection is provided on the side end surface of the closing lid, and a V-shaped recess into which the projection of the closing lid fits is provided on the side surface of the lid receiving frame. In addition to displaying arrows at each location where a The back of the step and the edge of the closing lid are machined. In addition, a rectangular notch is provided at the edge of the closing lid, and a flat lever is inserted into the notch, and the tip of the screw is locked to the back of the closing lid to use as a point of force. The end of the lid receiving frame acts as a fulcrum to open the lid.

c Problems to be solved by the present invention The lid holder frame has a recessed part on the side of the lid holder step, so when machining the lid holder step, there is no protrusion, so it can be easily machined without any problems. . However, since the closing lid has protrusions on the side end faces, machining to avoid the protrusions will increase processing costs, which is not economical and significantly increases production costs.If the side end faces are not machined, the lid holder frame will be damaged. A space is created between the lid and the lid, and as the lid slides due to vehicle traffic, both wear out quickly, causing the lid to fall below the ground.

In addition, because the space between the closing lid and the lid receiving frame is filled with dirt, it is extremely difficult to open the lid by inserting your finger into the notch without using a screw. If earth and sand becomes clogged between the lid receiving steps, the receiving surface of the lid receiving frame will wear out early due to the sliding of the closing lid due to vehicle traffic, and when worn, the closing lid will fall below the ground surface and cause the difference in level. As a result, the impact caused by passing vehicles generates a large amount of noise, and furthermore, the degree of wear becomes severe.

"Structure of the invention" a Means for solving the problem A protrusion is provided vertically near the end of the back surface of the circular closing lid, and a bolt rod is inserted into the protrusion in the centripetal direction of the closing lid, so that the outer protrusion of the bolt rod is The part protrudes from the lower periphery and locks into a recess that defines the fitting position, which is provided in the lid receiving step provided on the lid receiving frame, and prevents the closing lid from rotating. An insertion recess is formed by cutting out a metal fitting or an area into which a finger can be inserted, and the closing lid end is moved from the middle of the insertion recess toward the center of the closing lid to a depth that allows the fingers to be latched. A bag-shaped hole is made in the part, and the flesh part left like a ceiling is used as a locking part, and the locking part is closed with fingers and the lid is lifted up, or a metal fitting is inserted into the locking part and the lid is closed with the action of a screw. To easily lift and release a closing lid with a slight force, and to prevent earth and sand accumulated in an insertion recess from falling into an underground burial frame.

b. Effects and Examples When the closing lid is inserted into the lid receiving frame while rotating,
The outer protrusion of the bolt rod inserted through the protrusion on the back of the closing lid slides on the lid receiver step, and when the outer protrusion falls into the recess provided in the lid receiver step, rotation is blocked and the machine The lid receiving step portion having a processed smooth surface and the lower peripheral edge and side end surfaces of the closing lid are tightly fitted. In addition, bend your fingertip and insert it into the insertion recess provided at the end of the top surface of the closing lid, lift the locking part or insert the metal fitting into the locking part, use the contact point as the point of emphasis, and fit the closing lid. The lid is lifted by lever action using the contact point between the receiving frame and the metal fitting as a fulcrum.

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 7, a circular closing lid 1
A protrusion 5 is vertically provided near the end of the back surface of the holder, and a bolt rod 6 is inserted into the protrusion 5 in the centripetal direction for closing the lid so that the outer protrusion 6a of the bolt rod 6 protrudes to the lower surface peripheral edge 1a and the inner protrusion end. Suspend chain 7. By making the outer protrusion 6a of the bolt rod 6 protrude from the lower peripheral edge 1a,
At the lid receiving step part 8a of the lid receiving step part 8 of the lid receiving frame 8,
It is positioned and recessed into the locking recess 8b provided at one place, and the lower peripheral edge portion 1a of the closing lid 1 comes into close contact with the lid receiving step portion 8a. The insertion recess 2 is formed by cutting the upper end of the closing lid 1 facing the protrusion 5 into a petal shape having an area into which a metal fitting or a finger can be inserted, and up to approximately the middle of the end wall thickness. do. The bottom surface 4 of the insertion recess 2 is bulged downward,
A bag-shaped hole is formed from the middle toward the center of the closing lid 1 to a depth that allows a finger to be locked, leaving a fleshy part like a ceiling, thereby forming the fleshy part into a locking part 3.
In addition, in order to prevent the rotation of the anti-theft chain 7 suspended from the inner protruding end of the bolt rod 6, a centripetal projection 5 is provided vertically on the back surface of the closing lid 1, as shown in FIGS. 8 to 11. A protrusion 5b has an inner surface 5a projecting in a convex cross-section and comes into contact with the upper surface of the uppermost chain link 7a into which the bolt rod 6 is loosely inserted, and a protrusion 5b that fits into the chain link 7a and comes into contact with the lower surface of the bolt rod 6. The contacting protrusion 5c is formed by recessing the central portion of the convex shape. Then, the lower peripheral edge 1a and side edges of the closing lid 1 are machined to have a smooth surface.

"Effect of the invention" Since the invention is constructed in this way, the lid holder frame 8
The lid receiving step 8a and the lower peripheral edge 1a and side edges of the closing lid 1, that is, all the contact surfaces of both can be easily formed into smooth surfaces by machining, which is economical and reduces production costs. Since the closing lid 1 and the lid receiving frame 8 are tightly fitted together, there is no wear damage or wobbling between the two. Also, the outer protrusion 6a of the bolt rod 6 inserted into the protrusion 5 of the closing part 1 is connected to the lid receiving step 8a.
The closing lid 1 moves while sliding on the upper surface, sinks into the recess 8b, and in the correct position, the closing lid 1 is accurately and tightly fitted into the lid receiving frame 8, and the rotation of the closing lid 1 is prevented, and when the lid is not in the correct position, the lower surface periphery Since the outer protrusion 6a protruding from the portion 1b remains on the lid receiving stepped portion 8a, the two will never fit tightly together. Also, chain 7 is the top chain link 7.
Since the upper surface of a is in contact with the protrusion 5b, together with the contact with the bolt rod, the upward movement of the chain 7 is prevented, and since the protrusion 5c is fitted into the chain link 7a, it is possible to move the chain link 7a from side to side. This prevents the chain 7 from twisting unnecessarily or becoming disengaged from the bolt rod. Furthermore, when opening the closing lid 1, by lifting the locking part 3 with your fingers, it can be easily lifted with a small amount of force using the contact position between the upper peripheral edge of the protrusion 5 and the lid receiving step part 8a as a fulcrum. . Also, insert a metal fitting into the locking part 3, bring the tip of the metal fitting into contact with the inner edge corner of the lid receiving frame 8, use the screw as a fulcrum to lift the closing lid 1 with extremely weak force, and then move the closing lid 1 to the side. It can be easily released from the underground frame by sliding it. In addition, since the space surrounded by the insertion recess 2 of the closing lid 1 and the inner circumferential side wall of the lid receiving frame 8 is formed in a bag shape, earth and sand may fall into the underground burial frame or onto the lid receiving stepped portion 8a. There is no estimate. Therefore, there is no risk of dirt accumulating inside the underground burial frame, and the closing lid will not wobble.

As described above, the present invention is a useful device that has a strong and durable structure and is easy to manufacture.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a bottom view of the same, Fig. 3 is a sectional view taken along line A-A in Fig. 1, Fig. 4 is an enlarged view of the X part in Fig. 5 is a view taken along the Y arrow in FIG. 4, FIG. 6 is a sectional view taken along line B-B in FIG. The figure is a partially cutaway bottom view showing another embodiment, FIG. 9 is a longitudinal cross-sectional view of the main part, and FIG. 10 is a cross-sectional view taken along line AA in FIG. 9.
FIG. 11 is a cutaway bottom view of the main part. DESCRIPTION OF SYMBOLS 1... Closing lid, 1a... Bottom periphery, 2... Insertion recess, 3... Locking part, 5... Protrusion, 6... Bolt rod, 6a... Outer protrusion, 8... Lid Receiving frame, 8a
...Lid holder stepped section.

Claims (1)

[Scope of utility model registration request] A protrusion is vertically provided near the end of the back surface of the circular closing lid, a bolt rod is inserted through the protrusion in the centripetal direction of the closing lid, and the outer protrusion of the bolt rod is protruded from the periphery of the lower surface and provided on the lid receiving frame. A closing lid for an underground frame, characterized in that it locks into a recess that is provided in a lid receiving step and defines a fitting position.