JP4837704B2 - Hose clamp - Google Patents

Description

  The present invention relates to a hose clamp that can hold a rubber hose or the like at the end of a connection pipe, in particular, a holderless type hose clamp that can maintain its expanded state without using a holder.

  Although this kind of conventional hose clamp is not specifically shown, a clamping ring bent in a C shape with a metal strip and a pair of standing up in the radial direction intersecting from both ends of the clamping ring. One grip has an arch-like wide dimension having a guide groove opening formed on the tightening ring side, and the other grip has the inside of the guide groove. Engagement that has a narrow width that can be moved, and that forms a locking piece extending inward on the side edge of one grip, and releasably locks the locking piece on the side edge of the other grip. It is the structure which forms a piece (for example, refer patent document 1).

For this reason, when using a conventional hose clamp, when a pair of grips are gripped by a pliers and approached in the circumferential direction, the engaging piece of the other grip wraps around the back side of the locking piece of one grip. Since the clamping ring is held in an expanded state, the hose is inserted into the clamping ring and the hose is fitted to the end of the connection pipe. When the other grip is gripped by the pliers and approached in the width direction, the engaging piece of the other grip slides out of the locking piece of one grip, and the locked state therebetween is released. The fastening ring is automatically reduced in diameter by its own restoring force, and the hose can be fastened and fixed to the connecting pipe.
Japanese Patent Laid-Open No. 10-61855

  Therefore, under the conventional hose clamp, the diameter of the tightening ring can be obtained without using the holder that has been used so far, and if the engagement state of the engagement piece with respect to the engagement piece is released, Although it has an advantage that the diameter of the fastening ring can be automatically reduced, on the other hand, when the engagement state of the engagement piece with respect to the engagement piece is released, the diameter of the fastening ring is rapidly reduced on the hose. Therefore, the possibility of the hose tightening posture becoming unsatisfactory or the hose tightening position being distorted due to the reaction was sufficiently considered.

  The present invention was developed in order to effectively solve the problems of the conventional hose clamp. The invention according to claim 1 is a C-shaped fastening ring and the fastening ring. It consists of a pair of grips that intersect from both ends of the ring and stand up in the radial direction, one of the grips has a wide dimension with an opening of a guide groove opened on the fastening ring side, and the other grip is A hose that has a narrow dimension that can move in the guide groove and allows the hose to be tightened when the diameter of the tightening ring is reduced in a free state, and expands the diameter of the tightening ring when a pair of grips are brought close to each other In the clamp, an engagement portion and an engagement portion that are detachably engaged between the pair of grips are provided, the pair of grips are brought close to each other, and the engagement portion is engaged with the engagement portion. A pair of grips are moved closer in the circumferential direction Then, the other grip is shifted laterally via the tapered guide portion, and in conjunction with this, the engaging portion moves in a direction to release from the locking portion, and thereafter, the engaging portion is moved to the locking portion. While the diameter of the clamping ring is reduced without contact with the taper, the taper-shaped guide portion has a step higher than the general surface of the clamping ring on the clamping ring near one grip by a thickness greater than that of the clamping ring. The structure to which is given is adopted.

  According to the second aspect of the present invention, on the premise of the first aspect, when the pair of grips are brought close to each other and the locking portion and the engaging portion are locked, the tightening ring is twisted. In a state where a pair of grips are brought close to each other in the circumferential direction and the other grip is shifted laterally via a tapered guide portion, and a pair of grips are opened to reduce the diameter of the tightening ring. Below, the structure which becomes a state which eliminates the said twist was employ | adopted for the clamping ring.

  The invention of claim 3 is based on claim 2 and the positional relationship between the locking portion and the tapered guiding portion is based on the side edge of the other grip in the free state. A configuration is adopted in which the guide portion is separated outward from the reference side edge, and the periphery of the guide portion protrudes on the same line or the inside of the reference side edge.

Depending, the one pair of the grip is brought closer to the grip and the circumferential direction with pliers, when engaging the other grip the locking portion, expanded state of the clamping ring is obtained, in this state, the pair of grip When the grips is further approached circumferentially pliers, the other grip, disengaged from the engaging portion, Runode to lateral shift toward the opening of the guide groove, then, on the contrary, gradually gripping pliers If it is loosened, the diameter of the fastening ring can be reduced slowly. Therefore, unlike the conventional case, there is no fear that the hose tightening posture or the hose tightening position may be distorted due to the rapid diameter reduction of the tightening ring.

  Hereinafter, the present invention will be described in detail with reference to each preferred embodiment. First, the hose clamp according to the first embodiment is bent in a C shape with a metal strip as shown in FIGS. The clamping ring 1 is composed of a pair of grips 2A and 2B that are erected in the radial direction by intersecting both ends of the clamping ring 1. One grip 2A is opened on the clamping ring 1 side. The guide grip 3 has an open arch-like dimension having an opening 3a, and the other grip 2B has a narrow dimension capable of moving in the guide groove 3 so that the fastening ring 1 is reduced in diameter in a free state. In some cases, it is assumed that the hose can be tightened and the diameter of the tightening ring 1 is increased when the pair of grips 2A and 2B are brought close to each other.

  In the first embodiment, the groove portion of the guide groove 3 near the one grip 2A is provided with a convex engagement portion 4 that removably engages the side edge of the other grip 2B. A tapered guiding portion 5 for guiding the other grip 2B in the direction of the opening 3a of the guide groove 3 is provided at the groove edge of the guide groove 3 continuing from the locking portion 4, and the continuous locking portion 4 and the guiding portion are provided. As shown in FIG. 5, a step 6 that is higher than the general surface of the tightening ring 1 by one or more plate thickness is positively provided. A tapered portion 7 is also provided on the outer edge of the locking portion 4. Further, the positional relationship between the locking portion 4 and the guiding portion 5 described above is based on the side edge of the other grip 2B in the free state, and the front end of the locking portion 4 is located outside the reference side edge. The peripheral edge of the guiding portion 5 is set so as to protrude on the same line or the inner side of the reference side edge.

  Therefore, when the pair of grips 2A and 2B are gripped by the pliers and are brought close to each other in the circumferential direction, the other grip 2B moves while being in sliding contact with the tapered portion 7 of the locking portion 4, so When the grips 2A and 2B are slightly shifted in the width direction, the side edge of the other grip 2B is locked to the locking portion 4, thereby holding the tightening ring 1 in the expanded diameter state. In such a state, when the pair of grips 2A and 2B are gripped by the pliers and further approached in the circumferential direction, the other grip 2B is disengaged from the locking portion 4, and this time, the tapered guide Since the guide 5 is guided in the direction of the opening 3a while being displaced laterally by the portion 5, the other grip 2B comes into contact with the locking portion 4 if the grip of the pliers is gradually loosened. Without guide groove 3 Because gradually moved, thereby clamping ring 1 it is possible to shrink slowly.

  Therefore, when the hose (not shown) is fastened and fixed to the end of the connection pipe (not shown) using the hose clamp having such a configuration, first, the pair of grips 2A and 2B are attached to the pliers ( 3), the side edges of the other grip 2B are guided to the tapered portion 7 and locked to the convex locking portion 4 as shown in FIG. Thus, the tightening ring 1 is held in the expanded diameter state.

  Then, after that, a hose is inserted into the tightening ring 1 in the expanded diameter state, the hose is fitted into the end of the connection pipe, and the pair of grips 2A and 2B in the approaching state are gripped by the pliers. When further approaching in the circumferential direction, as shown in FIG. 4, the other grip 2 </ b> B is automatically disengaged from the locking portion 4, guided to the guide portion 5, and shifted laterally toward the opening 3 a of the guide groove 3. On the contrary, if the grip of the pliers is gradually loosened, the other grip 2B is gradually brought into the guide groove 3 without coming into contact with the locking portion 4 as shown in FIG. It moves and it becomes possible to reduce the diameter of the fastening ring 1 slowly. Accordingly, as in the prior art, there is no fear of the hose tightening posture being inferior or the hose tightening position being out of order due to the rapid diameter reduction of the tightening ring 1.

  When the diameter of the tightening ring 1 is increased, the other grip 2B is locked to the locking portion 4 by using the restoring force of the tightening ring 1, so that it is temporarily shifted and locked. Although there is no fear of coming off from the portion 4, when it is necessary to prevent lateral displacement more reliably, for example, as shown in FIG. 6, the inner edge of the locking portion 4 is formed in a concave shape on the side edge of the other grip 2B. A bent portion 8 is formed, or, as shown in FIG. 7, a recessed portion 9 whose depth changes along the concave shape of the inner edge of the locking portion 4 is formed in the entire width direction of the other grip 2B. Then, if the bent portion 8 or the recessed portion 9 of the other grip 2B is configured to overlap the locking portion 4, the lateral displacement of the other grip 2B can be more reliably prevented, so the other grip There is no worry that 2B will come off from the locking portion 4.

  Further, in the first embodiment, even when the diameter of the tightening ring 1 is increased due to the positively imparted step 6 equal to or greater than the plate thickness to the continuous locking portion 4 and the guiding portion 5, Even when the diameter is reduced, the base portions of the pair of grips 2 </ b> A and 2 </ b> B do not interfere with each other, so that a smooth diameter expansion or diameter reduction of the tightening ring 1 can be ensured. The positional relationship between the engaging portion 4 and the guiding portion 5 is such that the engaging portion 4 is located on the right side in the figure with respect to the reference side edge when the side edge of the other grip 2B in the free state is used as a reference. Since the guide portion 5 is located on the same line as the reference side edge or on the left side in the figure, the smooth expansion or contraction of the tightening ring 1 can be ensured also from this point.

  Next, the hose clamp according to the second embodiment will be described. The second embodiment basically follows the first embodiment, but the difference is as shown in FIG. In the groove edge of the guide groove 3 near one grip 2A, a locking portion 4 whose tip protrudes in the reverse direction from the opening 3a is extended, while the fastening ring 1 portion near the other grip 2B An engaging portion 10 that is detachably engaged with the distal end of the engaging portion 4 is provided, and a tapered guiding portion that guides the other grip 2B toward the opening 3a of the guide groove 3 on the outer edge of the engaging portion 4 5 is provided.

  Therefore, under the second embodiment, when the pair of grips 2A and 2B are gripped by the pliers and approached in the circumferential direction, at this point, the pair of grips 2A and 2B are slightly shifted in the width direction. As shown in FIG. 9, the engaging portion 10 is locked to the tip of the locking portion 4, so that the tightening ring 1 is held in an expanded state.

  In such a state, when the pair of grips 2A and 2B are gripped by the pliers and further approached in the circumferential direction, the other grip 2B is provided on the outer edge of the locking portion 4 as shown in FIG. Accordingly, the engaging portion 10 is disengaged from the locking portion 4 as shown in FIG. Therefore, after the pair of grips 2A and 2B are completely approached, this time, conversely, if the grip of the pliers is gradually loosened, the engaging portion 10 contacts the locking portion 4 as shown in FIG. Without this, the other grip 2B gradually moves in the guide groove 3, and the diameter of the fastening ring 1 can be reduced slowly.

  Therefore, even in the second embodiment, it is possible to reduce the diameter of the tightening ring 1 slowly. Therefore, as in the prior art, the tightening posture of the hose can be achieved by the rapid diameter reduction of the tightening ring 1. There is no need to worry about failure or hose tightening position. Further, in the second embodiment, since the lateral displacement prevention piece 11 is projected at the tip of the engaging portion 4, there is no concern that the engaging portion 10 will be laterally displaced from the engaging portion 4 and come off. Absent.

  In the second embodiment, the engaging portion 10 near the other grip 2B is simply raised and raised, but as shown in FIG. Can be configured to bend further in the lateral direction, and when the stepped portion 6 is provided to the locking portion 4, the side wall of the guide groove 3 provided with the locking portion 4 is simply formed on the general surface. However, as shown in FIG. 13B, the side wall can be maintained at the same height as the general surface, and a step 6 can be added to a portion continuous with the groove edge. In particular, in this case, since the tightening area of the tightening ring 1 with respect to the outer peripheral surface of the hose can be increased, a more secure tightening and fixing state can be obtained.

  As described above, since the hose clamp according to the present invention can reduce the diameter of the fastening ring slowly, it can be used as a hose clamp that fastens and fixes a rubber hose or the like to the end of the connection pipe. Become.

It is a perspective view which shows the hose clamp which concerns on the 1st Example of this invention. It is the same front view. It is a top view which shows the state which expanded the diameter of the clamping ring. It is a top view which shows the state which the other grip removed from the latching | locking part. It is a top view which shows the state which a fastening ring shrinks in diameter. (A) is a principal part perspective view which shows the other example of the other grip, (B) is a top view which shows the state latched by the latching | locking part. (A) is a principal part perspective view which shows another example of the other grip, (B) is a top view which shows the state latched by the latching | locking part. It is a perspective view which shows the hose clamp which concerns on a 2nd Example. It is a top view which shows the state which expanded the diameter of the clamping ring. It is a top view which shows the state by which the other grip is guide | induced to the guidance | induction part. It is a top view which shows the state from which the engaging part removed from the latching | locking part. It is a top view which shows the state which a fastening ring shrinks in diameter. (A) is a principal part perspective view which shows the other example of an engaging part, (B) is a principal part perspective view which shows the other example of a level | step difference.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Clamping ring 2A One grip 2B The other grip 3 Guide groove 3a Opening of guide groove 4 Engagement part 5 Guide part 6 Step 7 Taper shape part 8 Bending part 9 Depression part 10 Engagement part 11 Side slip prevention piece

Claims (3)

A clamping ring bent in a C-shape and a pair of grips standing in the radial direction intersecting from both ends of the clamping ring, and one grip is a guide established on the clamping ring side It has a wide dimension with an opening in the groove, and the other grip has a narrow dimension that can move in the guide groove. When the diameter of the tightening ring is reduced in a free state, the hose can be tightened. When the grips are close to each other, in the hose clamp that expands the diameter of the fastening ring,
A locking part formed on the clamping ring ;
An engaging portion formed on the grip, which is engaged by the engaging portion ,
The locking portion is configured to detachably engage the engaging portion in a state where the tightening ring is twisted ,
On the clamping ring grips closer, it is constituted as higher due step is applied than the general surface of the clamping ring,
After the pair of grips are moved in the circumferential direction from the state in which the locking part has locked the engaging part , the pair of grips are relatively shifted in the width direction and the locked state is released. A hose clamp characterized in that a hose can be tightened in a state where the diameter of the tightening ring is reduced without coming into contact with the locking portion and the twisting ring eliminates the twist . Is brought closer to a pair of grip in a circumferential direction, shifted in the width direction and the other of the grip through a tapered guiding portion, when the engaging portion in conjunction with this deviates from the locking portion, the ring tightening the Configure to be in a state to eliminate twist,
The hose clamp according to claim 1, wherein the step is provided to a tapered guide portion.   The positional relationship between the locking portion and the tapered guiding portion is based on the side edge of the other grip in the free state. 3. The hose clamp according to claim 2, wherein the peripheral edge protrudes on the same line or inward of the reference side edge.

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