JPS6328141Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a torque regulating cap with a ratchet that is screwed onto the fuel tank of a vehicle, especially a resin-made fuel tank for use in preventing fuel leakage in the event of a vehicle collision. It's about caps.

[Conventional technology]

Conventionally, this type of cap, for example,
As shown in the figure, the cap body 1 has a cylindrical shape and has a negative pressure valve mechanism 7 provided therein, and a lid body 6 that is screwed onto the cap body 1. The cap body 1 is provided with a threaded part 2a on its outer periphery to be threaded into the fillet neck of the fuel tank, a threaded part 2b on its inner periphery to be threaded into a torque regulating threaded part 6a of the lid 6, and an outer periphery on its upper part. An annular protrusion 3 is provided that protrudes from the
A ratchet claw or tooth 3a is provided on the lower surface of this annular projection 3.
is provided, and an O-
An annular recess 2c for mounting the ring 8 is provided, and
A V-shaped notch groove 5 is provided in the wall surface of this annular recess 2c. Further, the lid body 6 is connected to the cap body 1.
A threaded part 6a with a slot 6d which is threadedly engaged with the torque regulating threaded part 2b is provided in the center, and the threaded part 6a engages with the ratchet pawl or tooth 3a of the annular projection 3 provided on the lower surface of the cap body 1 on the inner periphery. A ring 6b is provided with ratchet teeth or pawls 6c.

This torque regulating cap with ratchet can be operated as follows. When the fuel tank cap is removed from the fillet neck of the fuel tank, the ratchet pawls or teeth 3a and the ratchet teeth or pawls 6c are engaged. In this state, insert the fuel tank cap into the fillet neck of the fuel tank and twist it, and the fuel tank cap will fit into the fillet neck. When the O-ring 8 hits the fillet neck, it acts as a resistance and the torque regulating screw 6a begins to rotate along the torque regulating screw 2b. This torque regulating screw 6a, 2
The thread angle of b is the ratchet pawl or teeth 3a, 6.
Since the angle is larger than the angle c, when the torque regulating screw 6a rotates, the ratchet pawl or tooth 3a
and 6c are disengaged. Furthermore, when the fuel tank cap is rotated, the torque regulating screw 6a of the lid body 6 is moved to the torque regulating screw 2b of the cap main body 2.
The screw may become misaligned with the screw thread, making it impossible to tighten to the set torque.

On the other hand, if a vehicle equipped with this torque regulating cap with a ratchet encounters a collision, etc.
When an external force is applied to the fuel tank cap, a crack is generated from the notch groove 5 and the lid 6 provided on the cap body 1 comes off, leaving only the cap body 1 in the fillet neck of the tank to prevent leakage of fuel.

[Problem that the invention attempts to solve]

However, since the cap body 1 is removed from the mold after being molded before it has solidified, it may be deformed during the mold removal process and subsequent cooling.
As shown in FIG. 2, the annular projection 3 hangs down,
There is a risk that the painstakingly formed notch groove 5 may become blocked and the ratchet pawl or tooth 3a formed on the lower surface of the annular projection 3 may interfere with the ratchet tooth or pawl 6c of the lid body 6. That is, there is a possibility that the function of the torque regulating cap with a ratchet may be impaired.

The present invention was devised to solve such conventional problems, and its purpose is to prevent the ratchet pawls or teeth provided on the lid body and the cap body from interfering with each other during normal operation, and to prevent the ratchet pawls or teeth provided on the lid body and the cap body, respectively, from interfering with each other during normal operation. To provide a torque regulating cap with a ratchet for a fuel tank in which a lid body is detached from a cap body in the event of a collision and the cap body remains in the fillet neck of a loss tank.

[Means for solving problems]

The torque regulating cap with a ratchet for a fuel tank according to the present invention has a cylindrical cap body and a lid screwed onto the cap body, and the cap body has a fillet neck of the fuel tank on the outer periphery. A threaded part is provided on the inner periphery, a threaded part is provided on the inner periphery to be threaded into the threaded part for torque regulation of the lid, an annular projection is provided on the upper part that protrudes to the outer periphery, and a ratchet pawl or teeth is provided on the lower surface of this annular projection. The lid is provided with a threaded part in the center with a slot for torque regulation that screws into the threaded part of the cap body, and a ratchet of an annular protrusion provided on the lower surface of the cap body on the inner periphery. In a torque regulating cap with a ratchet for a fuel tank comprising a ring provided with a ratchet tooth or pawl that engages with the pawl or teeth, the ratchet pawl or tooth on the cap body and the lid are connected at the lower part of the annular projection on the cap body. A large number of through-holes are provided in the portions of the body that correspond to the portions that engage with the ratchet teeth or pawls.

[Effect]

In the present invention, the annular protrusion is not provided with a notch to assist in the bending direction, so even if the resin contracts after the cap body is molded and removed from the mold, the annular protrusion will deform and its shape will be reduced. The ratchet pawls or teeth provided on the lower surface do not interfere with the ratchet teeth or pawls provided on the ring of the lid body.

When a large force is applied to the lid in the direction of detaching it from the cap body in the event of a collision, cracks will appear at the portions of the many through holes provided around the cap, and the lid will separate from the cap body.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on FIGS. 3 and 4.

The fuel tank cap according to this embodiment has a cylindrical shape and includes a cap body 10 in which a negative pressure valve mechanism 16 is provided, and a lid 15 screwed onto the cap body 10.

The cap body 10 has a threaded portion 10a provided on the outer periphery for screwing into the fillet neck of the fuel tank.
, a threaded part 10b provided on the inner periphery to be screwed into the threaded part 15a with a slot 15d for torque regulation of the lid body 15, an annular protrusion 12 provided on the upper part so as to protrude to the outer periphery; A ratchet pawl or tooth 12a provided on the lower surface of the annular projection 12, a portion where the ratchet pawl or tooth 12a is provided, and a threaded portion 1.
An annular recess 1 for mounting an O-ring 17 provided at the lower part of the boundary 13 with the part where 0a is provided.
1, and is provided in a portion 13a located closer to the annular protrusion 12 than the annular recess 11 and corresponding to a portion where the ratchet pawl or tooth 12a of the cap body 10 and the ratchet tooth or pawl 15c of the lid body 15 engage. It is composed of a large number of through holes 14.

Further, the lid body 15 is provided with a threaded portion 15a with a slot 15d for torque regulation in the center portion, which is screwed into the threaded portion 10b for torque regulation of the cap body 10, and a threaded portion 15a with a slot 15d for torque regulation is provided on the inner periphery of the cap body 10 on the lower surface of the cap body 10. a ring 15b provided with ratchet teeth or pawls 15c that engage with ratchet pawls or teeth 12a of the annular projection 12;
is provided.

This fuel tank cap can be operated in the same manner as a conventional ratcheted torque regulating cap. When the fuel tank cap is removed from the fillet neck of the fuel tank, the ratchet pawls or teeth 12a and the ratchet teeth or pawls 15c are engaged. In this state, insert the fuel tank cap into the fuel tank fillet neck and twist it.
The fuel tank cap is inserted into the fillet neck. When the O-ring 17 hits the fillet neck, it becomes a resistance and the torque regulating screw 15
a begins to rotate along the torque regulating screw 10b. The thread angle of the torque regulating screws 15a, 10b is determined by the ratchet pawls or teeth 12a, 15c.
When the torque regulating screw 15a rotates, the ratchet pawl or tooth 12
The engagement between a and 15c is released. Further, when the fuel tank cap is rotated, the torque regulating screw 15a of the lid body 15 is displaced from the thread of the torque regulating screw 10b of the cap body 10, making it impossible to tighten the fuel tank cap to a torque higher than the set torque.

On the other hand, if a vehicle to which this torque regulating cap with a ratchet is attached encounters a collision or the like and an external force is applied to the fuel tank cap, the torque regulation cap with a ratchet may be damaged through the engagement portion between the ratchet pawl or tooth 12a and the ratchet tooth or pawl 15c. Then, the lid body 15 applies a pushing force to the annular protrusion 12. At this time, the annular protrusion 1
2 and the threaded portion 10a is more fragile than other parts due to the provision of a large number of through holes 14, this force causes the through holes 1 to
A crack occurs from 4, and the cap body 10 breaks down from the lid body 15.
is pushed up in the peeling direction, and the lid body 15 is removed from the cap body 10. However, the cap body 10
remains in the fuel tank fillet and prevents fuel from leaking.

[Effect of idea]

As described above, according to the present invention, a large number of through holes are provided at the lower part of the annular protrusion of the cap body, in a portion corresponding to the portion where the ratchet pawl or tooth of the cap body and the ratchet tooth or pawl of the lid body engage. Therefore, even if the resin is deformed due to shrinkage during mold cutting and cooling after molding the cap body, the ratchet pawl or teeth provided on the lower surface of the annular protrusion will be deformed and the cap will not be used. This prevents interference with the ratchet teeth or pawls of the lid. Also, the large number of through holes can cause cracks to occur due to the force of a collision, thereby facilitating the removal of the lid from the cap body.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional fuel tank cap. FIG. 2 is a sectional view showing a state in which the annular projection of the cap body is deformed. FIG. 3 is a sectional view showing an embodiment of the torque regulating cap with ratchet for a fuel tank according to the present invention. Fourth
The figure is a front view of the cap body in FIG. 3. Explanation of symbols of main parts, 10...Cap body, 10a...Threaded part, 10b...Torque regulating threaded part, 12...Annular projection, 12a...Ratchet pawl or tooth, 13a...Boundary part, 14 . . . Through hole, 15 . . . Lid body, 15a . . . Torque regulating screw portion, 15b .

Claims (1)

[Scope of utility model registration request] The cap body has a cylindrical cap body and a lid body that is screwed onto the cap body. A screw portion is provided which engages with a regulating screw portion, an annular projection protruding to the outer periphery is provided on the upper part, and ratchet pawls or teeth are provided on the lower surface of the annular projection, and the lid body has a screw portion on the cap body. A ring with a slotted screw part in the center for torque regulation that screws into the cap body, and a ratchet tooth or pawl on the inner periphery that engages with the ratchet pawl or tooth of an annular projection provided on the lower surface of the cap body. In a torque regulating cap with a ratchet for a fuel tank, the lower part of the annular protrusion of the cap body corresponds to the part where the ratchet pawl or teeth of the cap body and the ratchet tooth or pawl of the lid body engage. A torque regulating resin cap with a ratchet for a fuel tank, characterized by having a large number of through holes in its parts.