JPH0223642Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hand grip that serves as a handhold or foothold for people entering and exiting underground structures such as manholes.

[Conventional technology]

BACKGROUND OF THE INVENTION A so-called hand grip, which serves as a handhold or footrest, is attached to an underground structure frame installed at an entrance to an underground structure such as a manhole to make it easier for people to ascend and descend.

An example of such a frame for an underground structure equipped with a hand grip is the one described in Design Publication No. 552110. The handgrip shown in this publication has a handgrip in the center, and both ends are bent so as to be fixed to locking parts provided on the manhole frame.

[Problem that the invention attempts to solve]

However, in conventional hand grips, the base is placed on the mass on the manhole side and only the tip of the base is fixed, so the load is concentrated on the fixed part, causing wobbling and weakening after long-term use. It becomes inadequate. In order to improve this problem, it is necessary to occupy a considerable part of the inner area of the manhole and bridge the hand grip. Therefore, there was a problem in that it interfered with the work of going up and down inside. Moreover, the installation work becomes troublesome.

Therefore, the present invention has a small occupied area, does not interfere with the work of going up and down into underground structures such as manholes, can safely go up and down inside underground structures, and has a simple structure. To provide a hand grip for an underground structure frame that is easy to install and can be stably fixed to the underground structure frame.

[Means for solving problems]

In order to achieve the purpose of the hand grip for the frame for underground structures of the present invention, the flange part of the frame for underground structures is provided with a locking rod insertion hole that penetrates in the vertical direction and a locking mechanism that locks the base end of the hand grip body. a holding part for holding a substantially central part of the base of the handgrip body; and an insertion hole penetrating in the vertical direction at a position corresponding to the tightening rod insertion hole. The supporting member is attached to the recessed part with an opening formed between the inner circumferential surface of the underground structure frame and the handgrip body, and the tightening rod insertion hole of the recessed part and the supporting member is inserted into the recessed part. and a tightening rod is inserted into the insertion hole and tightened.

〔Example〕

Hereinafter, the features of the present invention will be specifically explained with reference to embodiments shown in the drawings.

FIG. 1 is a perspective view of a frame 1 for underground structures, such as a manhole frame, to which a hand grip according to an embodiment of the present invention is attached, viewed from the outside. FIG. 2 is a plan view showing the underground structure frame seen through. Further, FIGS. 3 and 4 are sectional views taken from the - line and - line in FIG. 2, respectively.

The handgrip main body 2 is made of a core body made of a bar bent into a U-shape, and has bent parts 2a, 2a which are vertically bent ends of both base parts 3, 3. A synthetic resin coating 13 is provided on the outer periphery of at least the portion of the handgrip main body 2 that is exposed to the inner periphery of the underground structure frame 1.
is applied. This hand grip main body 2 is used as a hand grip when going up and down into an underground structure.

The handgrip main body 2 is fixedly supported on the underground structure frame 1 by a support member 5. As shown in FIG. 4, the support member 5 includes a tightening rod attachment part 10 having an insertion hole 9 in the vertical direction, and extends from both sides of the tightening rod attachment part 10, and has a handle near both ends. Holding parts 8, 8 in the form of through holes inserted through both bases 3, 3 of the grip main body 2
It consists of a plate-shaped member with holes.

On the other hand, a tightening rod insertion hole 7 is vertically formed in the center of the upper wall 1b of the recessed part 4 recessed in the lower surface of the flange of the underground structure frame 1 and at a position that coincides with the insertion hole 9. has been done. The support member 5 is disposed within the recessed portion 4 and is fixed by a tightening rod 6 such as a bolt inserted through the tightening rod insertion hole 7 and the insertion hole 9.

Furthermore, at the back of this recessed part 4, as shown in FIG.
A recess 12 for locking the grips 2a and 2a is formed to prevent the handgrip main body 2 from coming off.

Further, a protrusion 15 for supporting the base is provided in front of the upper wall 1b of the concave portion 4, and the protrusion 15 engages and supports the corresponding upper surfaces of the bases 3, 3.

When attaching and fixing the handgrip body 2 to the underground structure frame 1, both bases 3, 3 of the handgrip body 2 are attached.
are inserted into the holding parts 8, 8 at both ends of the support member 5. After the tip bent portions 2a, 2a are locked in the locking recess 12 of the recess 4, the tightening rod insertion hole 7 perpendicularly bored in the center of the upper wall 1b of the recess 4 is inserted. A tightening rod 6 such as a bolt is inserted and screwed into a nut 11 in the tightening rod attachment part 10. Next, by tightening the tightening rod 6, the bent portion 2a of the handgrip main body 2 is pressed into the locking recess 12, and the base portions 3, 3 are pressed into engagement with the base support protrusion 15. Thereby, the handgrip main body 2 is securely fixed to the underground structure frame 1.

This fixing work can be performed with an opening sufficient to insert a hand between the handgrip main body 2 and the underground structure frame 1.

In this way, the bases 3, 3 of the handgrip main body 2 are substantially accommodated in the recessed part 4, so that the handgrip main body 2
The area occupied in the underground structure can be made as small as possible. Therefore, it does not become an obstacle when going in and out of underground structures such as manholes, and it is possible to move up and down safely and quickly.

In addition, both the base parts 3, 3 of the handgrip body 2 are inserted into the holding parts 8, 8 of the support member 5, and the tightening rod 6 is passed through the washer 14 from the upper surface of the underground structure frame 1, and then the nut 11 is inserted.
Since the structure is such that it can be simply screwed onto and tightened, the handgrip main body 2 can be easily attached.

In addition, both the base parts 3, 3 of the handgrip body 2 are held by the holding parts 8, 8 of the support member 5, and the bent parts 2a, 2a formed at the tips of the base parts 3, 3 are inserted into the locking recess 12. Because it is locked, the handgrip body 2
can be reliably fixed to the underground structure frame 1. Therefore, the handgrip main body 2 is prevented from coming off, and the handgrip main body 2 can be reliably and stably attached to the underground structure frame 1.

FIG. 5 shows another example regarding the support member 5.
The support member 5 of this example is attached to the bases 3, 3 of the handgrip main body 2.
The holding portions 8, 8 in the form of through holes shown in FIGS. 1 to 4 are changed to holding portions 8', 8' in the form of grooves. This eliminates the need to insert the base portions 3, 3 of the handgrip main body 2, which simplifies the installation work accordingly.

[Effect of idea]

As explained above, in the handgrip of the present invention, the base end of the handgrip body is engaged with the locking recess of the recessed part, and the approximately central part of the handgrip body is held by the holding part of the support member. has been done. Therefore, the hand grip can be reliably fixed to the underground structure frame, and the fixed state can be stably maintained even during long-term use. Further, since the area required for the hand grip within the underground structure can be made as small as possible, it is possible to move up and down inside the underground structure smoothly and safely. Furthermore, since the hand grip can be attached by tightening bolts from above the outer periphery of the underground structure frame, the attachment work is simplified.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the underground structure frame with the hand grip of the present invention attached, viewed from the outside, Figure 2 is a plan view of the underground structure frame seen through, and Figure 3 is Figure 2. FIG. 4 is a cross-sectional view taken along the line - in FIG. 2, and FIG. 5 shows another example. 1: Frame for underground structure, 1b: Upper wall, 2: Hand grip body, 2a: Bent part, 3: Base, 4: Recessed part,
5: Support member, 6: Tightening rod, 7: Tightening rod insertion hole,
8: Holding part, 9: Insertion hole, 10: Tightening rod attachment part,
11: Nut, 12: Locking recess, 13: Synthetic resin coating, 14: Washer, 15: Base support protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] The flange of the frame for underground structures is provided with a recessed part that has a tightening rod insertion hole that penetrates in the vertical direction and a locking recess that locks the base tip of the handgrip body. , A support member having a holding part for holding a substantially central part of the base of the handgrip body and an insertion hole penetrating in the vertical direction at a position corresponding to the tightening rod insertion hole is installed inside the frame for an underground structure. With an opening formed between the peripheral surface and the handgrip main body, it is attached to the recessed part, and a tightening rod is inserted into the tightening rod insertion hole and the insertion hole of the recessed part and the support member and tightened. A hand grip for frames for underground structures that is characterized by: