JPS63161946U

JPS63161946U -

Info

Publication number: JPS63161946U
Application number: JP5089587U
Authority: JP
Priority date: 1987-04-03
Filing date: 1987-04-03
Publication date: 1988-10-21

Description

[Brief explanation of the drawing]

第１図は本考案のマンホール昇降具を昇降方向
より見た正面図、第２図は第１図の側面図、第３
図は本考案の左側の要部を第１図Ｘ―Ｘ′線方向
より見た図、第４図は第３図を上方より見た図、
第５図は第３図のＹ―Ｙ′線の上方よりロツクレ
バーを見た図、第６図は本考案のマンホール昇降
具の嵌合爪部をマンホール受枠の凹部に嵌合し踏
桟を踏込む前の状態図、第７図は本考案のマンホ
ール昇降具をマンホール受枠への固定が完了した
時点のマンホール首部の拡大図、第８図は地上に
手掛りの無い場合、マンホールへの出入する従来
例、第９図は従来のマンホール昇降具、イは正面
図、ロは側面図、第１０図は第９図のマンホール
昇降具をマンホールに装着した状態図、を示す。４：受枠、６：手摺り、８：常設はしご、９：
嵌合爪部材、９Ａ：嵌合爪部、１０：ロツクレバ
ー、１０Ａ：操作把手、１０Ｂ：係合部、１１：
踏桟、１１Ａ：固定板、１２：踏桟回転部材、１
２Ａ：回転軸装着部、１２Ｂ：係止爪部、１２Ｃ
：ストツパー部、１３：ばね、１４：安全ガイド
、１５：回転軸ねじ、１６：ストツパー板、１６
Ａ：ストツパー部、１７：回転軸ねじ、１８：ば
ね。 Figure 1 is a front view of the manhole lifting device of the present invention seen from the lifting direction, Figure 2 is a side view of Figure 1, and Figure 3 is a side view of Figure 1.
The figure is a view of the main part on the left side of the present invention as seen from the direction of the line X-X' in Figure 1, Figure 4 is a view of Figure 3 viewed from above,
Figure 5 is a view of the lock lever seen from above the Y-Y' line in Figure 3, and Figure 6 is a view of the manhole lifting tool of the present invention with the fitting claw part fitted into the recess of the manhole support frame and stepping on the treadle. Figure 7 is an enlarged view of the neck of the manhole after the manhole lifting device of the present invention has been fixed to the manhole support frame, and Figure 8 is the conventional method for entering and exiting the manhole when there is no handhold on the ground. For example, FIG. 9 shows a conventional manhole lifting device, A is a front view, B is a side view, and FIG. 10 is a diagram showing the manhole lifting device of FIG. 9 installed in a manhole. 4: Receiving frame, 6: Handrail, 8: Permanent ladder, 9:
Fitting claw member, 9A: Fitting claw portion, 10: Lock lever, 10A: Operation handle, 10B: Engagement portion, 11:
Stepper, 11A: Fixed plate, 12: Stepper rotation member, 1
2A: Rotating shaft attachment part, 12B: Locking claw part, 12C
: Stopper part, 13: Spring, 14: Safety guide, 15: Rotating shaft screw, 16: Stopper plate, 16
A: Stopper part, 17: Rotating shaft screw, 18: Spring.

Claims

[Scope of utility model registration request]

A fitting claw member is fixed to the handrail, and the fitting claw member is provided with a fitting claw part that fits into the recess of the manhole receiving frame, and the lower part has a locking claw part that locks into the manhole receiving frame, and the upper part has an engaging claw part that engages with the lock lever. a step-piece rotating member having a step-piece fixed therebetween is rotatably attached to the fitting pawl member and always biased in the direction of rotation of the hour hand, and an operation handle protruding from one end; A lock lever, which constitutes an engaging part that engages with the engaging claw part of the step rotation member, is rotatably attached to the other end and biased in the direction of rotation of the hour hand, and the fitting claw member is fitted into the recess of the manhole support frame. When the mating pawls are fitted and the treadle is stepped on, the treadle rotating member is rotated to lock the locking pawl to the manhole receiving frame, and the engaging pawl and the engaging portion of the lock lever can be engaged. A manhole lifting device comprising a handrail with no horizontal crosspiece above the top step of the handrail, and a tip portion of which is configured as a loop-shaped gripping portion.