JP6433402B2 - Locking mechanism of tubular body - Google Patents

Description

  The present invention relates to a tubular body locking mechanism suitable for attaching and detaching a tubular body to and from a housing by a one-touch operation.

  The lock mechanism of interest includes a tubular member (adapter) 1 as shown in FIG. 8 (disclosed in Patent Document 1) and a lock member (fastening cam lever) 5 provided on the housing 2 with respect to the housing (coupler) 2. This is a type that is engaged and disengaged with the engaging portion 8 of the tubular body 1 to be attached and detached. In the same figure, the tubular body 1 has a circumferential groove-like engaging portion 8 provided on the outer periphery and to which the cam portion 6 of the lock member 5 is engaged and disengaged. The housing 2 has a pair of projecting portions 3 provided on the outer periphery of a receiving cylinder portion that receives the distal end portion of the tubular body 1, and a lock member 5 disposed therebetween, and an opening 7 for projecting and retracting the cam portion 6. The lock member 5 is pivotally supported by the support shaft 4 in a state where the cam portion side is disposed between the projecting portions 3 with respect to the housing 2. When the locking member 5 is rotated to the tubular body 1 side, the cam portion 6 is immersed outside from the opening 7 to be unlocked, and when the locking member 5 is rotated to the housing 2 side, the cam portion 6 is released from the opening 7. Engage with the engaging portion 8 to be locked.

  In addition, the first and second engaging recesses 13 and 14 provided in the lock member 5 and the engagement recesses 13 provided in the housing 2 and biased in a direction to engage with the engaging recesses 13 and 14. , 14 and a lock pin 17 that can be engaged and disengaged. In the lock mechanism described above, the lock pin 17 engages with the first engagement recess 13 in the unlocked state of the lock member 5, and engages with the second engagement recess 14 in the locked state. Is prevented from being inadvertently rotated from the locked state to the unlocked state.

Japanese Patent No. 4773154

  As an application example, the above-described lock mechanism is also used when pipes or pipes are connected and separated by attaching and detaching the tubular body and the housing, or when the housing is attached to and detached from the tubular body to open and close one end of the tubular body. Are often used outdoors. In some cases, pipes and hoses that are irrigation materials are frequently attached and detached, and a housing is frequently attached and detached from a tubular body. In such a case, since the tubular body and the housing are separated and left on the ground such as a field, mud adhering to the connection end side of the tubular body or the housing is attached during the next connection operation. The kimono may not be normally engaged or disengaged. Such a malfunction causes a reduction in work efficiency and further causes leakage of water or the like transferred by pipes or hoses.

  The object of the present invention is to eliminate the above-described problems to some extent, and even if mud or sand adheres, the tubular body is scraped off in the process of inserting the corresponding tube portion of the tubular body into the receiving cylinder portion of the housing. Another object of the present invention is to provide a tubular body locking mechanism capable of securely fastening a housing. Other purposes will be clarified in the following description.

In order to achieve the above object, the present invention of claim 1 is directed to a tubular body in which a tubular member is attached to and detached from a housing by engaging and disengaging a locking member provided on the housing with an engaging portion of the tubular body. A locking mechanism provided in the housing for receiving a corresponding tube portion of the tubular body inwardly; and the receiving portion in a state in which the corresponding tube portion provided in the tubular body is inserted into the receiving tube portion A flange portion having an enlarged diameter facing the end surface of the tubular portion, and provided in at least one of the end surface of the receiving tubular portion and the flange portion, with the corresponding tube portion of the tubular body being inserted into the receiving tubular portion possess a projection to approach, also, the base of the projections, the inner diameter side of the receiving tubular portion but when the end face of the inner diameter side (the receiving tubular portion, in the case of the flange portion close to the outer periphery of the corresponding tube section Side) outer diameter side (in the case of the end face of the receiving tube) Outer diameter side of the receiving tubular portion, in the case of the flange portion is characterized in that it is formed in a mountain shape protruding toward the side) away from the outer periphery of the corresponding tube portion.
Further, the present invention of claim 2 is a tubular body locking mechanism in which a tubular member is attached to and detached from a housing by engaging and disengaging a locking member provided on the housing with an engaging portion of the tubular body. A receiving tube portion provided in the housing for receiving the corresponding tube portion of the tubular body inward, and an end surface of the receiving tube portion provided in the tubular body with the corresponding tube portion inserted into the receiving tube portion And a flange that is provided on at least one of the end surface of the receiving cylinder portion and the flange portion, and that approaches the other in a state where the corresponding tube portion of the tubular body is inserted into the receiving cylinder portion. There are a plurality of protrusions, and the protrusions are formed over the entire circumference of the end surface of the receiving cylinder portion and / or the end surface of the flange portion.

  In the above locking mechanism, the “projection” is a configuration in which the receiving cylinder portion and the flange portion face each other, that is, a configuration protruding from the end surface of the receiving cylinder portion, a configuration protruding from the flange portion, an end surface and flange of the receiving cylinder portion The structure which protrudes facing each part is included. As shown in FIG. 3, the protrusion engages the locking member with the engaging portion of the tubular body, that is, the tubular body and the housing are moved closer to each other, or one is moved closer to the other in order to attach the tubular body to the housing. Then, it acts to scrape off deposits such as mud adhering to the opposing surfaces of the receiving cylinder part and the flange part. Further, there may be only one protrusion because the housing and the tubular body may be relatively rotated as in the embodiment, and one protrusion is extended in the circumferential direction to form a crescent shape without an arc. May be.

The present invention as described above is more preferably embodied as specified in claims 3-4.
(A) The protrusion is configured to have a convex shape that becomes narrower from the base side toward the tip (Claim 3) .

(A) In the interior of the housing, an inclined portion is provided at a location facing the tip of the tubular body (claim 4) .

In each of the first and second aspects of the invention, for example, the tubular body and the housing are separated from each other on the ground surface, and mud or dirt is formed on the corresponding pipe portion of the tubular body, which is a connection portion between them, or on the end surface of the housing-side receiving cylinder portion. When the two are connected in a manner in which deposits such as sand are attached, the insertion process of inserting the corresponding tube portion of the tubular body into the receiving cylinder portion as shown in FIGS. 3B and 3C, that is, the protrusion is the flange portion. In the process of approaching or abutting, the deposits such as mud and sand adhered between the projection and the flange portion are scraped off by the projection. In other words, in this lock mechanism, even if the deposit adheres to the connection portion of each member, the deposit is automatically removed in the process of inserting the corresponding tube portion of the tubular body into the receiving cylinder portion of the housing by the scraping action of the protrusion. It is possible to eliminate them, thereby eliminating the connection failure and securely fastening the two.

In addition, in the first aspect of the present invention, since the protrusion has a mountain shape in which the base of the protrusion protrudes from the inner diameter side toward the outer diameter side, for example, the deposit is moved from the inner diameter side to the outer diameter side. It can be easily scraped off by movement, and the scraping action can be exhibited more effectively from that point.

On the other hand, in the invention of claim 2, since the plurality of protrusions are formed over the entire circumference of the end face of the receiving cylinder part and the end face of the flange part, it is easy to uniformly apply the scraping action to the entire circumference. The scraping action from the point can be exhibited more effectively.

In the invention of claim 3, as the shape of the protrusion, the protrusion has a protruding tip formed narrower than the base side, so that the above-described scraping action can be more effectively exhibited.

In the invention of claim 4 , if the inclined portion is provided in the inside of the housing at a location facing the tip of the tubular body, it becomes easy to remove the deposit on the tip of the tubular body along the inclined portion at the time of fastening.

The application example of the locking mechanism of the tubular body which concerns on a form example is shown, (a) is a top view in the usage condition of a housing and a tubular body, (b) is the front view, (c) is a right end view. It is the sectional view on the AA line of the said Fig.1 (a). (A)-(c) is sectional drawing shown in the state before inserting the said tubular body in a housing, the state in the middle of insertion, and the state at the time of insertion completion. (A) is the external appearance perspective view which shows the use condition of the said tubular body and housing, (b) is the structure figure which carried out the partial cross section which shows the relationship between the said tubular body and a housing. The said housing is shown, (a) is a perspective view in the state arrange | positioned in the up-down direction, (b) is the top view. A 1st modification is shown, (a) is a figure corresponding to Fig.1 (a), (b) is a figure corresponding to Fig.3 (a). A 2nd modification is shown, (a) is a figure corresponding to Drawing 6 (a), and (b) is a figure corresponding to Drawing 6 (b). The lock mechanism of patent document 1 is shown, (a) is sectional drawing in a locked state, (b) is sectional drawing in a non-locking state.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In this description, the structure of the embodiment shown in FIGS. 1 to 5 and the operation feature thereof will be described in the order of Modification 1 of FIG. 6 and Modification 2 of FIG.

(Structure) The lock mechanism of the embodiment is a type in which the tubular body 2 is attached to and detached from the housing 1 by engaging and releasing the lever 3 which is a locking member provided in the housing with the circumferential groove 26 of the tubular body 2. is there. The main parts are the receiving cylinder part 10 provided in the housing 1 for receiving the corresponding pipe part 20 of the tubular body 2 inside or in the cylinder, and the corresponding pipe part 20 provided in the tubular body 2 for the receiving cylinder part 10. In the inserted state, the flange portion 21 having an enlarged diameter facing the end surface 10 a of the receiving cylinder portion 10 and the end surface 10 a of the receiving cylinder portion 10 are provided, and the corresponding tube portion 20 of the tubular body 2 is inserted into the receiving cylinder portion 10. It is in the point which has the some protrusion 18 which approaches the flange part 21 in a state. The housing 1, the tubular body 2 and the lever 3 are all resin molded products.

  The other main parts are the structure of the lever 3 and the circumferential groove 26. That is, the lever 3 has a lever structure that can swing in a seesaw manner with the support shaft 5 as a fulcrum and is tilted in one direction by the urging force of the toshin spring 4 that is an urging member. On the other hand, the circumferential groove 26 is a circumferential groove that is provided on the outer periphery of the tubular body 2 so that the lever 3 can be engaged against the urging force. These details will be clarified below.

  As shown in FIGS. 4 and 5, the housing 1 is connected to a receiving cylinder portion 10 provided on one end side and connected to the tubular body 2, and a pipe member 8 such as a pipe or a hose provided on the other end side. The connecting portion 11 is made up of. The inner diameter of the receiving cylinder portion 10 is larger than that of the connection portion 11. On the other hand, the tubular body 2 is inserted into the receiving cylinder portion 10 and has a corresponding pipe portion 20 in which a circumferential groove 26 as an engaging portion is formed on the outer periphery of the pipe, and a pipe or hose provided on the other end side. The connecting portion 22 is connected to the pipe member 7 such as the like, and the enlarged flange portion 21 is provided between the corresponding pipe portion 20 and the connecting portion 22. This inner diameter is uniform from the front end 24 to the rear end 25. In addition, the connection parts 11 and 22 are provided with a plurality of rotating claws 17 and 27 that are difficult to be removed when inserted into the pipe members 8 and 7.

  Among these, the receiving cylinder part 10 is one diameter larger than the connection part 11, and the substantially rectangular frame part 16 provided in the inner peripheral groove | channel 15 provided in the inner periphery, and two places equally divided by the circumference | surroundings. And a plurality of protrusions 18 provided on the end face 10a. The inner circumferential groove 15 is located on the far side closer to the connecting portion 11 than the frame portion 16. A ring-shaped seal member 6 is attached to the inner circumferential groove 15. The seal member 6 keeps the space between the inner diameter of the receiving tube portion 10 and the corresponding tube portion 20 watertight.

  As shown in FIG. 3, each protrusion 18 scrapes off the deposit 9 in the process of inserting the corresponding tube portion 20 into the receiving cylinder portion 10 even in a mode in which the deposit 9 such as mud adheres to the connection portion of each member. . Each protrusion 18 has a semi-conical shape, that is, a protruding tip formed gradually narrower than the base side, as shown in FIG. It is preferable that it has an arc shape or a mountain shape projecting from the side toward the outer diameter side, and is formed at substantially equal intervals over the entire circumference of the end surface 10 a of the receiving cylinder portion 10.

  The frame portion 16 has an opening 16a leading to the inside of the cylinder lacking a part of the bottom surface, a higher receiving surface 16b for rotation regulation provided on the back side in the axial direction, and a rotation provided on the opposite side. It has a movement restricting receiving surface 16c and left and right shaft holes 16d provided in a direction crossing the axial direction.

  The lever 3 is supported by the frame portion 16 via the support shaft 5 so as to be swingable. That is, the lever 3 includes an upper plate portion 30 and a block portion 31 projecting from the lower surface of the upper plate portion 30, and the entire size of the lever 3 is swingable within the frame portion 16. The upper plate portion 30 has a non-slip protrusion 30a protruding on the rear side of the upper surface, and is set to a contact portion 30b where the lower surface front side contacts the receiving surface 16b. The block portion 31 includes a plurality of grooves 32 that are notched in a reverse concave shape on the lower surface, a locking portion 34 that protrudes most downward on the front side of the lower surface, and an abutment portion 35 that is located on the rear side of the lower surface and contacts the receiving surface 16c. And a shaft hole 36 penetrating the left and right.

  The lever 3 can swing back and forth with respect to the frame portion 16 by being inserted into the one shaft hole 16d and the shaft hole 36 of the frame portion and the other shaft hole 16d of the frame portion to prevent the lever 3 from coming off. Assembled. At that time, the lever 3 is rotated and biased by the torsion spring 4 until the contact portion 30b contacts the receiving surface 16b as shown in the enlarged view of FIG. 2, and the locking portion 34 protrudes from the opening 16a.

  Further, in the process of inserting the corresponding tube portion 20 of the tubular body into the receiving cylinder portion 10, the lever 3 hits the front end 24 of the corresponding tube portion 20 as shown in FIG. When the corresponding tube portion 20 is further pushed into the receiving cylinder portion 10, the lever 3 reduces the amount of protrusion of the locking portion 34 from the opening 16 a against the urging force of the torsion spring 4 due to the stress received from the corresponding tube portion 20. While being rotated in the direction, the engaging portion 34 engages with the circumferential groove 26 as shown in FIG.

  The torsion spring 4 is on one side of the block portion 31 as shown in FIG. 4B, the intermediate winding portion is held in a skewed state on the support shaft 5, and one end 4a is inserted through the groove 32 and again. The other end 4b is locked to the receiving surface 16c against the urging force while protruding outward from the inside of the groove. However, the urging member is not limited to the torsion spring 4, and may be constituted by, for example, an elastic piece integrally formed in the lever 3 or the frame portion 16.

(Operation) The above locking mechanism is particularly excellent in terms of operation characteristics as follows.
(A) In this locking mechanism, when the tubular body 2 is mounted close to the housing 1 or when the housing 1 and the tubular body 2 are connected close to each other, during the insertion of the corresponding tube portion 20 into the receiving tube portion 10, Since the engaging portion 34 hits the front end 24 of the corresponding tube portion as shown in FIG. 3B, the corresponding tube portion 20 is further pushed into the receiving cylinder portion 10. Then, the lever 3 rotates against the urging force of the torsion spring 4 by the stress received from the corresponding tube portion 20, and the engaging portion 34 engages with the circumferential groove 26 as shown in FIG. In this engaged state, as shown in the enlarged view of FIG. 2, the lever 3 is in the initial substantially horizontal state in the frame portion 16 in a state where the contact portion 30 b is in contact with the receiving surface 16 b and the rotation is restricted.

  Accordingly, the lock mechanism can be attached by a push-in operation, that is, a one-touch operation, and the lever 3 is arranged on the outer side and can be visually observed. Of course, compared with Patent Document 1, the appearance is compact and easy to handle, and since the weight is made of resin, it is light and easy to carry. Note that an arrow F in the drawing indicates a pressing direction when the lever 3 is pushed with a finger or the like to release the engagement.

(A) In the above mounting or coupling operation, for example, the housing 1 and the tubular body 2 are left on the ground surface in a separated state, and the corresponding tube portion 20 of the tubular body, which is a connecting portion between them, or the receiving cylinder portion 10 of the housing. There may be a case where a deposit 9 such as mud or sand adheres to the end face 10a. Conventionally, when operated in such a manner, the corresponding tube portion of the tubular body may not be inserted into the receiving tube portion until the end, resulting in poor engagement. However, in this locking mechanism, as shown in FIGS. 3B and 3C, the insertion process of inserting the corresponding tube portion 20 of the tubular body into the receiving cylinder portion 10, that is, each protrusion 18 approaches or abuts the flange portion 21. In the process, the adhering material 9 adhered between the protrusion 18 and the flange portion 21 is scraped off by each protrusion 18, thereby making it difficult for the conventional poor engagement to occur, so that the two are securely engaged. Can be concluded.

(C) Since each of the above-described protrusions 18 is formed so that the protruding tip gradually becomes narrower from the base side, the above-described scraping action is more effectively exhibited even when the adhering material 9 such as mud is dried and hardened. it can. Further, as shown in FIG. 5, each protrusion 18 has an arc or a mountain shape in which the base of each protrusion protrudes from the inner diameter side toward the outer diameter side. It is easy to scrape off while moving, and the scraping action can be further demonstrated. Moreover, since each protrusion 18 is formed over the entire circumference of the end surface 10a of the receiving cylinder part, it is easy to impart the scraping action evenly over the entire circumference, and the scraping action is more effectively exhibited from that point as well. it can. In addition, when the housing 1 and the tubular body 2 are relatively rotated, deposits such as mud are more likely to fall off. Therefore, with this lock mechanism, it is possible to eliminate or halve the work of washing dirt and other deposits as in the prior art.

(D) In the above locking mechanism, since the inclined portion 14 is provided at a location in the cylinder of the receiving tube portion 10 and facing the end surface 24 of the corresponding tube portion 20, for example, the end surface of the corresponding tube portion 20. At the time of fastening or the like, an adhering matter such as mud that has adhered to 24 is easily scraped into the connecting portion 11 along the inclined portion 14. In the fastened state, the housing 1 and the tubular body 2 are relatively rotatable together because the locking portion 34 is engaged with the circumferential groove 26, and are connected to the connection portions 11 and 22. It is difficult to receive the torsional direction stress received from the pipe members 7 and 8, and since the torsional correction of the pipe members 7 and 8 is performed, the detachability is improved.

(E) The housing 1 and the tubular body 2 are in a state in which the protrusions 18 are in contact with the opposing end surfaces of the flange portion 21 as shown in FIG. As shown in FIG. 2, both members are moved slightly by the hydraulic pressure, that is, in a direction away from each other until the locking portion 34 contacts the corresponding end surface of the circumferential groove 26. At the time of pressurization by this hydraulic pressure, the locking portion 34 is in pressure contact with the corresponding end surface of the circumferential groove 26 and the lever 3 cannot be pushed (unlocked state), which is excellent in safety. 1, FIG. 6 (a), and FIG. 8 are shown in a state in which the protrusions 18 and 28 are separated from the flange portion 21 as described above.

(F) When the housing 1 and the tubular body 2 are separated again, each lever 3 is pressed in the direction of arrow F in FIG. Then, each lever 3 is rotated from the substantially horizontal state against the urging force of the torsion spring 4 until the contact portion 35 contacts the receiving surface 16c as shown in FIG. As a result, the engaging portion 34 is disengaged from the circumferential groove 26. Therefore, with this state maintained, the corresponding tube portion 20 of the tubular body is pulled out from the receiving tube portion 10 of the housing, or the housing 1 and the tubular body 2 are pulled away from each other.

(Modification 1) Modification 1 of FIG. 6 omits the protrusions on the end face 10a of the receiving cylinder part as compared with the above-described embodiment, and provides a plurality of protrusions 28 similar to the protrusions 18 on the flange part 21 of the tubular body. It is an example. In this description, only changes to the above embodiment are described in order to avoid duplication.

  The flange portion 21 is provided with a plurality of projections 28 in the same or similar shape as the projection 18 on the end surface of the both end surfaces facing the end surface 10a of the receiving cylinder portion. For this reason, even in this lock mechanism, in the insertion process of inserting the corresponding tube portion 20 of the tubular body into the receiving cylinder portion 10, that is, in the process where each projection 28 approaches or abuts the end surface 10a, the gap between the end surface 10a and the flange portion 21 is obtained. The adhering matter adhering to the surface is scraped off by the projections 28, thereby making it difficult for the conventional poor engagement to occur, so that both can be reliably engaged and fastened.

(Modification 2) Modification 2 of FIG. 7 is an example in which both the plurality of protrusions 18 provided on the end face 10a of the above-described embodiment and the plurality of protrusions 28 provided on the opposite end faces of the flange portion 21 are provided. is there. In this locking mechanism, the tube portion 20 is attached between the end surface 10a and the flange portion 21 in the insertion process of inserting the corresponding tube portion 20 of the tubular body into the receiving cylinder portion 10, that is, in the process in which the projections 18 and 28 approach or contact each other. The adhered matter that has been removed is scraped off by the protrusions 18 and 28, thereby making it difficult for conventional poor engagement to occur, so that both can be reliably engaged and fastened.

  As described above, the tubular body locking mechanism according to the present invention only needs to have the configuration specified in the claims, and the details can be further changed or developed with reference to the form examples and the respective modified examples. It is. For example, the use may be a tubular body locking mechanism for attaching / detaching a tubular body to / from the housing. For example, the housing may be attached / detached to / from the fixed tubular body, or the tubular body may be attached / detached to / from the fixed housing. It may be the case.

  Further, the housing can be configured as a lid or a cap by omitting the connecting portion on the opposite side to the receiving tube portion and using a shielding wall instead of the connecting portion. The support shaft 5 may be provided integrally with the lever. The shape of the protrusions 18 and 28 is arbitrary as long as it can scrape off deposits such as mud, and various shapes can be adopted in addition to the form examples. As an example, it is the structure which consists of a shape similar to the circular arc extended in the circumferential direction or a circular arc. Although pipes and hoses are assumed as the pipe members 7 and 8, metal pipes may be used.

1... Housing (10 is a receiving cylinder part, 11 is a connecting part)
2 .... Tubular body (20 is a corresponding tube portion, 22 is a connecting portion)
3. Lever (locking member)
4 ... Torsion spring (biasing member)
5 ··· Support shaft 6 ··· Seal member 7 ··· Tube member 8 ··· Tube member 9 ··· Mud deposit 21 ··· Flange portion 18 ··· Projection 26 ... Circumferential grooves (engaging parts)
28 ... Protrusions

Claims (4)

A tubular body locking mechanism for attaching and detaching a tubular body to and from a housing by engaging and disengaging a locking member provided on the housing with an engaging portion of the tubular body,
A receiving tube portion provided in the housing and receiving a corresponding tube portion of the tubular body inside;
An enlarged flange portion that is provided in the tubular body and faces the end surface of the receiving cylinder portion in a state where a corresponding tube portion is inserted into the receiving cylinder portion;
Provided on at least one end surface and the flange portion of the receiving tubular portion, possess a projection to approach the other in a state of inserting the corresponding tube portion of the tubular body to said receiving tubular portion,
The tubular body locking mechanism is characterized in that the base of the protrusion is formed in a mountain shape projecting from the inner diameter side toward the outer diameter side . A tubular body locking mechanism for attaching and detaching a tubular body to and from a housing by engaging and disengaging a locking member provided on the housing with an engaging portion of the tubular body,
A receiving tube portion provided in the housing and receiving a corresponding tube portion of the tubular body inside;
An enlarged flange portion that is provided in the tubular body and faces the end surface of the receiving cylinder portion in a state where a corresponding tube portion is inserted into the receiving cylinder portion;
A protrusion that is provided on at least one of the end surface of the receiving cylinder part and the flange part and approaches the other in a state in which the corresponding tube part of the tubular body is inserted into the receiving cylinder part;
The tubular body locking mechanism is characterized in that there are a plurality of the protrusions, and the protrusions are formed over the entire circumference of the end surface of the receiving tube portion and / or the end surface of the flange portion . The tubular body locking mechanism according to claim 1 , wherein the protrusion is formed in a convex shape that becomes narrower from the base side toward the tip . Wherein among the interior of the housing, the tubular body of the locking mechanism according to any one of claims 1 to 3, characterized in that the inclined portion is provided at a position facing the distal end of the tubular body.

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