JPH053553Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a hand grip mounting structure for an underground structure frame provided at an entrance to an underground structure such as a manhole. This invention relates to a hand grip mounting structure that allows equipment to be carried into the office without any hindrance.

[Conventional technology]

Conventionally, to attach a hand grip to the frame body of an underground structure frame, for example, a screw groove was provided at the tip of the base of the hand grip, this was inserted into an insertion hole provided on the inner peripheral surface of the frame body, and the hand grip was directly secured with a nut. A method of fixing by attaching or welding is adopted. However, when the hand grip is attached using these methods, it is not possible to obtain a stable fixed state, and the load is concentrated on the fixed part, causing looseness during use or during transportation for a long period of time. There was a danger that the hand grip itself could come off the frame body.

Therefore, the inventor of the present invention has developed a hand grip for an underground structure frame that can endure stable use over a long period of time by stably fixing it to the frame body of the underground structure frame, and is easy to install. This was actually requested in 1984.
The application was filed as No. 89266 (Utility Model Publication No. 61-6545).

[Problem that the invention attempts to solve]

The hand grip proposed in this Jitsugan No. 59-89266 is
When attached to a frame for an underground structure, it is maintained in a fixed state protruding toward the center of the frame. Therefore, the hand grip becomes an obstacle when transporting equipment into an underground structure. In order to avoid this, it is necessary to make the hand grip smaller, but if the hand grip is made smaller, it will not be able to fully demonstrate its original function of ensuring safety when going up and down.

Therefore, the present invention further improves the hand grip proposed in the previous application, and makes it possible to slide the hand grip along the radial direction of the frame body, thereby ensuring safety when ascending and descending, and ensuring safety in underground structures. An object of the present invention is to provide a hand grip mounting structure for a frame for an underground structure, which allows equipment to be carried into the underground structure without any hindrance.

[Means for solving problems]

In order to achieve the purpose, the hand-held mounting structure of the present invention includes a frame body for underground structures, a fixed plate fixed to the bottom of the frame body, a supporting part arranged on this fixed plate, and a support part arranged on the fixed plate. The grip bar is slidably supported in the radial direction by a support part, and the support part has a braking part that engages with a protrusion provided at an end of the grip bar to restrict sliding of the grip bar. It is characterized by having the following.

The supporting part here may be one that is formed integrally with the fixed plate, one that is formed to be detachable from the fixed plate, or a pair of protrusions provided upright from the fixed plate. It can also be taken as a thing.

Further, the braking portion may be formed in the support portion in the shape of a long hole, or may be formed in the middle of the pair of front and rear protruding support portions.

[Effect]

In the handgrip mounting structure of the present invention, the end of the grip bar provided with the protrusion is slidably supported in the radial direction of the frame body by the support part, and the protrusion is engaged with the brake part. This limits the sliding interval of the grip bar.

〔Example〕

Hereinafter, the features of the present invention will be specifically explained using examples with reference to the drawings.

FIG. 1 is an exploded view showing a state in which the hand grip of this embodiment is attached to an underground structure frame, and FIG. 2 is a sectional view showing a state in which the hand grip is attached by bolting. Note that in these figures, only a portion of the underground structure frame is shown.

A hollow portion of an appropriate size is formed in the lower surface of the frame body 1 of the frame for underground structures. A fixed plate 2 is attached to the hollow part of the frame body 1 with bolts 3 and nuts 4. For this reason, the fixed plate 2
A raised portion 5 having a hole through which the bolt 3 is inserted is formed in a part of the portion. Note that the back side of the raised portion 5 is formed into a concave shape to accommodate the head of the bolt 3. On the other hand, the frame body 1 is provided with a hole 6 through which the shaft of a bolt 3 extending from the hole in the raised portion 5 is inserted, and a nut 4 is screwed onto the tip of the bolt 3. .

Further, the fixed plate 2 is provided with a pair of openings 7a, 7b, and projections 9a, 9b provided on the lower surface of the holders 8a, 8b are fitted into these openings 7a, 7b. The protrusions 9a, 9b are formed into tapered slopes as shown in FIG. 3b. On the other hand, the inner peripheral surfaces of the openings 7a and 7b that receive the openings 7a and 7b are also
As shown in FIG. 2, it is formed into a similar tapered slope, into which the holders 8a and 8b are fitted and received.

Grooved support parts 12a and 12b are formed inside the centers of these holders 8a and 8b to slidably support the ends 11a and 11b of the grip bar 10, as shown in FIG. 3b. has been done. Then, the end portions 11a,
By arranging 11b, the grip bar 10 can be slidably supported. Although the cross-sectional shape of the support portions 12a and 12b is a partial circle with an open top in the illustrated example, the cross-sectional shape of the support portions 12a and 12b is not limited to this;
Any material may be used as long as it corresponds to the cross-sectional shape of a and 11b.

Further, as shown in FIG. 3a, the holder 8a,
A long hole-shaped brake part 13a along the longitudinal direction of 8b,
13b is formed at the bottom of the supports 12a, 12b. As shown in FIG.
The protrusions 14a and 14b provided in the braking part 1 are arranged.
At the front and rear ends of 3a and 13b, the grip bar 10
limits the distance at which the frame body 1 can slide in the radial direction.

The holders 8a and 8b are made of synthetic resin. Therefore, as shown in Figure 2,
When the fixed plate 2 is bolted to the frame body 1, the ends 11a and 11b are pressed against the back surface of the frame body 1 so that it exhibits some elasticity and the grip bar 10 can slide in a stable state. Furthermore, since the holders 8a and 8b are made of synthetic resin, sliding of the grip bar 10 will not become difficult due to rust.

In this way, when transporting equipment into an underground structure, the grip rod 10 can be moved to the retracted position as needed, so that the grip rod 10 does not interfere with the transport work. Further, when the operator enters or exits, the operator moves the grip bar 10 to the forward position and places his or her hands or legs on it, thereby making it possible to perform the lifting and lowering operations safely and easily.

Note that the grip bar 10 shown in FIG.
It is shaped like an arc with a curvature similar to that of the With the grip bar 10 having such a shape, it does not protrude too much in the retracted position, and the proportion of protrusion into the internal space of the frame body 1 in the forward position is small, so it does not interfere with the work of transporting equipment. It is possible to increase the size. However, it goes without saying that the gripping portion of the gripping rod 10 may be made linear without being restricted to this. Although FIG. 1 shows a portion of the frame body to which the grip rod 10 is attached, an appropriate number of grip rods 10 may be installed on the inner circumferential surface of the frame body as required.

FIG. 4 shows a second embodiment in which the support portion is integrally molded with the fixed plate. In addition, in the same figure, Figure 1~
Components corresponding to those shown in FIG. 3 are designated by the same reference numerals.

In this example, the raised portion 5 and the supporting portion 12a,
A fixed plate 2 integrally provided with 12b is manufactured by injection molding of synthetic resin. These support parts 12a,
12b includes brake parts 13a and 13 shown in FIG.
A long hole-shaped braking portion (not shown) similar to b is formed. Both ends 11 of the grip bar 10 are attached to this brake part.
Sliding of the grip bar 10 is restricted by arranging the protrusions 14a and 14b provided on the protrusions a and 11b.
This fixed plate 2 is fixed to the back surface of the frame body 1 in the same manner as shown in FIG. In addition, the material for the fixed plate 2 is as follows:
Not only synthetic resin but also metal materials formed by casting or sheet metal processing can be used.

FIG. 5 shows a third embodiment in which the support portion is provided upright from the fixed plate.

That is, on the surface of the fixed plate 2, there are a pair of protruding support parts 15a, 1 in the front and back along the longitudinal direction of both ends 11a, 11b of the grip bar 10 placed thereon.
5a, 15b, and 15b are formed. On the other hand, flanged protrusions 16a, 16b are formed at both ends 11a, 11b of the grip bar 10. These flange-like protrusions 16a, 16b form a pair of protrusion-like supports 15a, 15a and 15b, 15.
The ends 11a and 11b of the grip bar 10 are attached to the support part 1 so that the ends 11a and 11b of the grip bar 10 are placed on the brake parts 17a and 17b between the
5a, 15b, and a flange-shaped protrusion 16
The fixed plate 2 is attached to the back surface of the frame body 1 so that a, 16b are in contact with the back surface of the frame body 1 and the grip bar is slidable. Thereby, the sliding interval of the grip bar 10 is regulated by the braking parts 17a and 17b.

Alternatively, the brim-like protrusions 16a, 16b may not be provided over the entire circumference of both ends 11a, 11b of the grip bar 10, but may be provided only at the portions that abut the protrusions-like supports 15a, 15b.

[Effect of idea]

As explained above, in the hand grip mounting structure of the present invention, the grip bar can be easily moved from the retreated position to the forward position, and the protrusions provided at both ends of the grip rod are connected to the brake part. The engagement prevents the grip bar from falling off. Therefore, the safety of workers when ascending and descending into the underground structure is ensured by placing the grip bar in the forward position, that is, in use only when necessary, and by moving the grip rod to the retracted position to store it. As a result, the grip rod does not become an obstacle to the work of transporting equipment into the underground structure. Furthermore, by having such a structure that can move forward and backward, the grip bar itself can be made larger, making it easier for people to move up and down.

[Brief explanation of the drawing]

Figure 1 is an exploded view showing how the hand grip of the frame for underground structures is attached to the frame body in the embodiment of the present invention, and Figure 2 is an exploded view showing how the hand grip of the frame for underground structures is attached to the frame body, and Figure 2 shows the grip rod being attached by bolting the fixed plate to the frame body. FIG. 3A is a plan view of the used holder, and FIG. 3B is a cross-sectional view of FIG. Further, FIGS. 4 and 5 show the second and third embodiments, respectively. 1... Frame body, 2... Fixed plate, 3... Bolt, 4
... Nut, 5 ... Protrusion, 6 ... Hole, 7a,
7b...opening, 8a, 8b...holder, 9
a, 9b... protrusion, 10... grip bar, 11a, 1
1b... end, 12a, 12b... support part, 13
a, 13b...Brake part, 14a, 14b...Protrusion part, 15a, 15b...Protrusion-shaped support part, 16
a, 16b...flange-shaped protrusion, 17a, 17b...
...Brake part.

Claims (1)

[Claims for Utility Model Registration] 1. A frame body for an underground structure, a fixed plate fixed to the bottom of the frame body, a supporting part disposed on the fixed plate, and a part that slides in the radial direction on this supporting part. The grip bar is movably supported, and the support part is provided with a braking part that engages with a protrusion provided at an end of the grip bar to restrict sliding of the grip bar. Hand grip mounting structure for frames for underground structures. 2. A hand-held mounting structure for a frame for an underground structure, characterized in that the support portion according to claim 1 of the utility model registration is formed to be detachable from the fixed plate. 3. A hand grip mounting structure for a frame for an underground structure, characterized in that the support portions set forth in claim 1 of the utility model registration form are a pair of front and rear projections provided upright from a fixed plate. 4. A hand-held mounting structure for a frame for an underground structure, characterized in that the braking part according to claim 1 of the registered utility model is formed in the shape of a long hole in the support part. 5. A hand-grip mounting structure for a frame for an underground structure, characterized in that the braking part according to claim 1 of the registered utility model is formed in the middle of a pair of front and rear protruding support parts.