JPH033641Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial field of application" This invention is designed to tighten and lock the body frame and the lid fitted into the inner periphery of the upper end of the body frame with head screws, and then loosen the head screws to remove the head. This invention relates to a manhole cover mounting device in which a screwless screw is screwed into a main body frame, the lock is released, and the cover is removed from the main body frame.

``Prior art'' Conventionally, in order to tighten and lock the manhole cover to the body frame, screws are screwed into the body frame, a single-load weight with a hook on one side is pivoted to the cover, and the hook is attached to the locking part of the body frame. It was locked. However, even if the vault is loosened and removed from the main body frame, a special unlocking tool must be used to unlock it, which is inconvenient.

``Problem that the invention attempts to solve'' This invention uses the screw holes drilled in the main body frame to secure the lid to the main body frame without using a special unlocking tool, and removes the head screws. This is an attempt to eliminate the need to use any other unlocking tool by using only a screwless screw (pot screw).

``Means for solving the problem'' The present invention eliminates the risk of the lid fitted into the inner periphery of the upper end of the main body frame shifting or flying up due to a car passing over the top surface or gas generated in the manhole. The main body is made by inserting a headed or stepped screw into a hole drilled around the lid, locking the back of the head or step to the top of the lid, and extending the threaded part of the screw along the back of the lid. Fix the lid to the main body frame by screwing it into the screw hole drilled in the mounting part of the frame, and engage the hook part of the locking member using a weight pivoted on the back of the lid to the hook part of the main body frame to prevent the lid from flying up. This prevents the lid from slipping off, and even if the user attempts to steal the item by loosening the screws and removing the lid from the main body frame, the hook part of the weight-using lock member will not come off the hook part of the main body frame, so the lid cannot be removed. If necessary, when removing the lid from the main body frame, loosen the head or stepped screws that are attached to the main body frame that connect the lid and main body frame, remove the screws, and remove the head or step screws. etc. into the screw hole of the main body frame, and use the tip of the screw to push down the end of the locking member and rotate it around the shaft attachment part to release the hook part of the locking member from the hook part of the main body frame and engage it. The structure is such that the lid opening operation is not obstructed by unscrewing screws or the like.

"Operation" This invention has a head when tightening and locking the lid body frame.
A stepped vault or the like can be screwed to the main body frame, the head or step can be locked to the surface of the lid, and the lid can be fixed and locked to the main body frame. To unlock and remove the lid from the main body frame, remove the headed or stepped screw screwed into the screw hole of the main body frame from the main body frame, and replace it with a screw thread of the same size as the headed or stepped screw. Screw a potato screw through the hole in the lid into the screw hole in the main body, press the tip of the screw into contact with the hook of the lock member, rotate the hook of the lock member from the catch on the main body frame, pull it away, and open the lid. The lid can be lifted and opened freely.

``Example'' 1 is a main body frame having a circular trapezoidal lid fitting recess 1a on the inside, 2 is a hook part of a locking member protruding from the inner periphery of the main body frame 1, and has a shaped part 3 at the tip. and an arcuate sliding surface 4 is provided on the bottom surface thereof. Reference numeral 5 denotes a lid fitted into the lid fitting part 1a of the main body frame 1, and a recess 7 with a hole 6 is provided on the upper surface of the lid. Reference numeral 8 denotes a female threaded hole cut into the hook part 2 of the body frame, and a screw 10 having a head (or step) 9 inserted into the hole 6 of the lid 5 is inserted into this female threaded hole by the operation described later. Screw the threaded part 11. Reference numeral 12 is a set screw (set screw) without a head (or step), and has a threaded portion 13 with the same outer diameter and pitch as the screw 10. This potato screw is made by pulling out a screw 10 having a head (or step) 9 from a female threaded hole 8, and inserting a potato screw 12 into a hole 6.
Through it, screw it into the female threaded hole 8, and while it is still screwed in, contact and push down a locking member, which will be described later, to unlock the locking member from the shaped part 3 of the main body frame 1. 14
is a locking member shaft stopper formed in a U-shape when viewed from above and protruding from the back surface of the lid 5; a shaft 15 is inserted into both side walls of the locking member shaft stopper, and a weight is attached to one end of the shaft 15; 16 at the other end, a hook portion 17 and a guide portion 18
The shaft hole 20 of the lock member 19 is inserted through the shaft hole 20 formed with the lock member 19.

Operation: To cover and lock the lid 5 on the body frame 2, press the
Turn the lid 5 in the direction of the arrow in the figure and advance to the left (FIG. 3) while sliding the upper surface of the guide portion 18 of the lock member 19 on the arcuate sliding surface 4 of the hook portion 3 of the lock member 2. Therefore, the hook portion 17 also slides on the arc-shaped sliding surface 4, and when the hook portion 17 leaves the arc-shaped sliding surface 4, the U-shaped lock member shaft support 14 of the lid 5 hits the hook portion 3 of the lock member 2, and the lid is closed. 5 and the center of the female threaded hole 8 of the lock member 2 coincide with each other. Then, insert the threaded part of the head screw 10 into the hole 6, screw the tip 11 into the female threaded hole 8, and make the head 9 into the recess 7.
The lid is tightly fixed to the main body frame 1 by contacting the bottom surface of the main body frame 1. Even if the head 9 of the mounting screw 10 is turned with a wrench to remove the screw 11 from the female threaded hole 8 and the cover 5 is rotated in the opposite direction, the hook 17 of the locking member 19 will not hold the cantilever weight 16. The action causes the hook part 3 of the lock member 2 to
The lid 5 cannot be opened because of the impact. To open the lid 5, turn the head 9 of the screw 10 with a wrench to remove the threaded part 11 from the screw 8, and then screw the main screw 12, which has a thread on the entire length, into the female thread part 8. When the tip of the locking member 12 collides with the guide portion 18 of the locking member 19, the locking member 19 is rotated counterclockwise, and the hook portion 17 passes under the shaped portion 3 and rotates under the arcuate sliding surface 4. The lid 5 can be opened by being lifted upward while moving. Next, lid 5
To close the lid 5, fit the lid 5 onto the inner periphery of the body frame 2, remove the potato screw 12 from the female threaded hole 8, and screw another headed screw 10 into the female threaded hole 8 and tighten. In this case, since the lower end surface of the head screw 10 is separated from the guide portion 18 of the locking member 19, the engagement between the shaped portion 3 and the hook portion 17 of the locking member 19 does not come off and the locked state continues. The other side of the lid in the diametrical direction is tightened to the main body frame with screws, but drawings and explanations are omitted.

``Effects'' As mentioned above, when tightening the lid to the main body frame, the head, step, etc. of the screw is brought into contact with the surface of the lid, such as a headed screw or stepped screw, and the screw is tightened to the main body. The hook part of the locking member can be hooked onto the shape of the main body frame by screwing into the female screw engraved on the frame, and the lock can be maintained even if the head screw or stepped screw is loosened and removed. At the same time, a potato screw is screwed into the same female thread of the main body frame, and the tip of the potato screw pushes down the guide portion of the locking member against the gravity of the weight, separating the hook portion of the locking member from the shaped portion. Since the lid can be opened in this state, the number of parts is small and locking/unlocking can be easily and reliably performed.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view of the locking part when the body frame and lid are fitted together, Fig. 2 is an enlarged partially cutaway plan view of the locked state, and Fig. 3 is an enlarged longitudinal side view of the same. FIG. 4 is an enlarged plan view with a part cut away in the unlocked state, and FIG. 5 is a longitudinal sectional side view of the same. 1: Body frame, 2: Hook part of locking member, 3:
Shape, 4: Arc-shaped sliding surface, 5: Lid, 6: Stupid hole,
7: Hollow, 8: Female screw hole, 9: Screw head, 1
0: Screw, 11: Threaded part of the screw, 12: Potato screw, 13: Threaded part of the potato screw, 14: Lock member shaft stop part, 15: Shaft, 16: Weight, 17: Hook part,
18: Guide part, 19: Lock member.

Claims (1)

[Scope of utility model registration request] A body frame 1 has a shaped part 3 for hooking the hook part 17 of the locking member 19 at the tip and a hook part 2 with a female screw hole 8 carved therein, and a hole 6 is provided at a position facing the female screw hole 8 of the body frame 1. The lid 5 has a locking part 14 with a locking member 19 pivoted on its back side and is fitted into the main body frame 1, and a locking member 19 has a weight 16 on one end and a hook part 17 and a guide part 18 on the other end. A manhole cover mounting device comprising: a stepped screw 10; and a set screw 12 having the same diameter and pitch as the stepped screw 10.