JPH0753522Y2 - Cam buckle type belt fastener - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention ensures that the belt can be securely tightened without being loosened at the time of tightening, and at the same time, the belt can be surely loosened without being tightened when the tightening force is released. The present invention relates to a cam buckle type belt tightening tool.

[Conventional technology]

The cam buckle type belt tightening tool is such that the cam buckle is pivotally attached to the tightening tool body and the cam buckle is pushed down to generate a predetermined tightening force on the belt wound around the winding roll. By causing this cam buckle, the tightening force of the belt is released.

Obtaining a predetermined belt tightening force is an indispensable minimum condition for a belt tightening tool, so enhance the efficiency of the belt tightening work and the work of loosening it to safely carry various cargoes or For storage, it is important to prevent the belt from loosening when tightening the belt and to prevent the belt from being tightened when the tightening force is released.

[Problems to be solved by the device]

Therefore, the present invention ensures that the belt can be securely tightened without being loosened at the time of tightening, and at the same time, can be surely loosened without being tightened when the tightening force is released. The task is to ensure the locking of the part that is generating the force and improve the safety.

[Means for Solving the Problems]

A cam buckle type belt tightening tool according to the present invention comprises a tightening tool body in which elongated holes are provided in both side plates provided on both sides of a bottom plate along a belt pulling direction; A winding roll provided with a fitting portion to be fitted into the elongated hole of the main body, and a follower portion provided outside the fitting portion; side plates provided on both sides of the top plate, A cam portion for pressing the follower portion of the attaching roll to release the tightening force of the belt wound around the winding roll, and the winding portion by pushing the follower portion in the opposite direction to the above. A pressure buckle for applying an initial tightening force to the belt wound around the roll and engaging with the follower portion, and cam buckles respectively provided at the base ends of the side plates. , The fitting portion of the winding roll is movably fitted in the elongated hole of the fastener body, and the follower portion of the winding roll is The side plate of the cam buckle is applied to the outside of the side plate of the fastener body, and the cam buckle is pivoted through a connecting pin in the vicinity of the elongated hole in the side plate of the fastener body. It is characterized by being worn.

[Function of device]

In the elongated hole provided in the side plate of the fastener body, the winding roll is supported so as to be movable along the pulling direction of the belt,
The belt wound around the winding roll is pressed against a pressed member provided in the vicinity of the winding roll, whereby the belt is tightened.

When the cam buckle is pushed down when performing the belt tightening work, the follower portion of the winding roll is pressed by the pressing portion provided on the side plate of the cam buckle, and the winding roll is pushed toward the pressed member. The initial tightening force is applied to the belt that is pressed and wound around the winding roll. When the belt is further pulled in this state to perform the tightening work, the initial tightening force is applied to the belt, so that the belt does not loosen even if the pulled belt is released. Therefore, the belt can be securely tightened, and when the cam buckle is pushed down, the pressing portion and the follower portion of the winding roll are engaged with each other, so that the initial tightening force is exceeded. Belt tightening force does not decrease. Therefore, the safety at the time of tightening the belt is enhanced.

On the other hand, when the cam buckle is caused while the belt is being tightened, the follower portion of the winding roll is pressed by the cam portion provided on the side plate of the belt, and the winding roll is retracted with respect to the pressed member. When the cam buckle is erected, this state is maintained. Therefore, the tightening force of the belt is reliably released, and the work of loosening the belt can be performed easily and safely.

〔Example〕

 Hereinafter, the present invention will be described in more detail with reference to examples.

FIG. 1 is a plan view of a belt tightening tool in a state where an initial tightening force is applied to a tension side belt V ₁ , FIG. 2 is a side view of the same, and FIG. FIG. 4 is a central longitudinal sectional view in which the cam buckle B is omitted, and FIG.
It is an X-ray sectional view. 1 to 4, the fastener body A is provided with side plates 2 on both sides of a bottom plate 1, and elongated holes 3 and 4 are formed in each side plate 2 along the pulling direction of the belts V ₁ and V _2. It is provided (see Fig. 10). In the cam buckle B, side plates 6 are provided on both sides of the top plate 5, each side plate 6 is applied to the outside of the side plate 2 of the fastener main body A, and the side plate of the fastener main body A is connected through the connecting pin 7. It is pivotally attached near the slot 3 in 2. The base end of the side plate 6 of the cam buckle B (connecting pin 7
A groove portion 10 is provided in a portion of the fastener body A pivotally attached to the side plate 2) (see FIG. 6), and one of the opposing portions of the groove portion 10 serves as the cam portion 8 and The other side is the pressurizing section 9. Connected to the cam portion 8, there is provided a lock portion 20 formed of an arc centered on the axis of the connecting pin 7. As shown in FIGS. 2 and 12,
Engagement protrusions 11 are provided on the outside of both side plates of the fastener body A, and the engagement protrusions 11 on both side plates 6 of the cam buckle B are provided.
An engaging hole 12 is provided in a portion corresponding to, so that when the cam buckle B is pushed down, they engage with each other.

The winding roll R for winding the belt V ₁ on the tension side is
As shown in FIG. 11, the fastener body A is attached to both ends thereof.
The fitting portion 13 to be fitted into the long hole 3 is provided.
The structure is such that a follower portion 14 is provided on the outside of 13. The fitting portion 13 of the winding roll R is inserted into the long holes 3 provided in the both side plates 2 of the fastener body A, whereby the winding roll R is
Both side plates 2 of the fastener main body A are movably supported in the pulling direction of the belts V ₁ and V ₂ . As shown in FIG. 4, when the winding roll R is supported by the side plates 2 of the fastener main body A, the follower portion 14 thereof projects to the outside of the side plate 2.

On the other hand, the winding roll R for winding the fixed side of the belt V ₂ 'is a structure with missing follower portion 14 only of the winding roll R, the fitting portion 13 fitting body tightening It is movably fitted in an elongated hole 4 provided in the side plate 2 of A. A pressed roll 15 is arranged in the vicinity of the winding roll R ', and is supported by both side plates A2 of the fastener body A. In FIG. 1, 16 is a washer for preventing the pressed roll 15 from coming off, and 17 is a ring for preventing the connecting pin 7 from coming off.

In this embodiment, the connecting pin 7 pivotally attaching the cam buckle B to the side plate 2 of the tightening tool body A in the portion of the belt V ₁ on the pulling side has the belt V ₁ when tightening the belt V _{1. It also} has the function of a pressed roll for pressing ₁ .

1 to 4 show a state in which an initial tightening force is applied to the belt V ₁ on the tension side, and when the cam buckle B is pushed down while the belt V ₁ is pulled to some extent, it is provided to this. The pressing portion 9 presses the follower portion 14 of the winding roll R,
The wrapping roll R is pressed against the connecting pin 7 side to apply an initial tightening force to the belt V ₁ wound around the wrapping roll R, and at the same time, the pressing unit 9 and the wrapping roll R follow each other. Node 14
And engage each other. As a result, the initial tightening force is applied to the belt V ₁ , and the winding roll R moves to the cam buckle B.
The locking force of the belt V ₁ is prevented from being reduced by being locked by the above, and exceeding the initial tightening force. When the belt V ₁ is further pulled in this state, as shown in FIG. 5, the follower portion 14 of the winding roll R separates from the pressurizing portion 9 of the cam buckle B, and the winding roll R becomes a connecting pin. 7, and the tightening force of the belt V ₁ is further increased. Here, since the initial tightening force is applied to the belt V _1, also release the belt V ₁ was pulled, never tightening force is subtracted loose the belt V _1. Therefore, the tightening work of the belt V ₁ can be surely performed, and at the same time, the safety at the time of tightening the belt is enhanced. The fixed belt V ₂ is clamped between the winding roll R ′ and the pressed roll 15.

On the other hand, when the cam buckle B is caused in the tightened state of the belts V ₁ and V ₂ , as shown in FIG. 6, the cam portion 8 of the cam buckle B causes the follower portion of the winding roll R to be in the middle of raising. 14 is pressed and the winding roll R is connected to the connecting pin 7.
Be receded against.

Then, as shown in FIGS. 7 to 9, when the cam buckle B is erected with respect to the fastener body A, the lock portion 20 of the cam buckle B moves the winding roll R to the connecting pin 7 side. It is prevented from being attracted. As a result, the belt V ₁ fastened by the winding roll R and the connecting pin 7
Force tightening is released, without the belt V ₁ is tightened, it is possible to loosen the belt V ₁ to ensure a safe state. Further, the cam portion 8 presses the follower portion 14 of the winding roll R and the force F applied to the free end portion of the cam buckle B.
The ratio of and is equal to the inverse ratio of the radius of curvature of the cam portion 8 and the distance from the center of the connecting pin 7 to the free end portion of the cam buckle B, and therefore causes the cam buckle B with a relatively small force F. be able to.

[Effect of device]

Since the belt tightening tool according to the present invention can perform the tightening work of the belt with the initial tightening force applied to the belt, the belt can be securely tightened without being loosened, and at the same time, the belt can be wound. Since the state in which the attached roll is retracted with respect to the pressed roll can be maintained, the belt can be reliably loosened without being tightened when the tightening force is released.

Further, since the pressing portion provided on the cam buckle and the follower portion of the winding roll are engaged with each other in the tightened state of the belt, the tightening force of the belt does not become smaller than the initial tightening force. It's also safe.

Further, the above can be realized only by the structure of the cam buckle which is indispensable as the cam buckle type belt tightening tool, the tightening tool body and the winding roll without any increase in the number of components.

[Brief description of drawings]

FIG. 1 is a plan view of a belt tightening tool in a state where an initial tightening force is applied to the tension side belt V ₁ , FIG. 2 is a side view of the same, and FIG. 3 is a cam buckle B of the same. An omitted central longitudinal sectional view, FIG. 4 is a sectional view taken along line XX of FIG. 2, and FIG. 5 is a sectional view of FIG. 2 in a state where a tightening force exceeding an initial tightening force is applied to the belt V ₁ . FIG. 6 is a side view of the belt tightening tool in the middle of causing the cam buckle B, and FIG. 7 is a side view of the belt tightening tool with the belt loosened, and FIG. Similarly, the figure is a central longitudinal sectional view in which the cam buckle B is also omitted, and FIG. 9 is a sectional view taken along the line YY of FIG.
10 is a side view of the fastener main body A, FIG. 11 is a perspective view of the winding roll R, and FIG. 12 is a partial sectional view taken along line ZZ of FIG. The description of the reference numerals of the main parts constituting the present invention is as follows. A: Fastener body, B: Cam buckle R: Winding roll, V ₁ : Belt on tension side V ₂ : Belt on fixed side 2: Fastener body side plate, 3: Slotted hole 6: Cam buckle side plate 7: Connecting pin (member to be pressed) 8: Cam part, 9: Pressing part 13: Fitting part of winding roll 14: Follower part of winding roll

Claims (1)

[Scope of utility model registration request] 1. A fastener main body in which elongated holes are provided in both sides of a bottom plate along a belt pulling direction, and both ends are fitted into the elongated holes of the fastener main body. And a side plate provided on both sides of the top plate for pressing the follower portion of the winding roll. And a cam portion for releasing the tightening force of the belt wound around the winding roll, and the belt wound around the winding roll by pressing the follower portion in the opposite direction to the above. A cam buckle provided at each of the base end portions of the side plates with a pressurizing portion for engaging with the follower portion at the same time as applying an initial tightening force to The fitting portion of the winding roll is movably fitted in the hole so that the follower portion of the winding roll projects from the side plate of the winding roll. The side plate of the wheel is applied to the outside of the side plate of the fastener body, and the cam buckle is pivotally attached to the side plate of the fastener body in the vicinity of the elongated hole via a connecting pin. Cam buckle type belt tightening tool.