JP7039016B2 - Joint structure and tools - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act Published at the Niigata ids Design Competition on March 8, 2018 and March 9, 2018.

The present invention relates to a tool having a joint structure for connecting long members to each other and a grip having a plurality of long members connected using the joint structure.

Patent Document 1 discloses a connecting structure of a pipe material. In this method, a joint body provided with a tubular sleeve portion is interposed between a plurality of pipe materials to connect them. At the tip of the pipe material, a spring part that extends cantilevered from the sleeve part and a ring-shaped part that surrounds the outer circumference of the receiving side end part of the pipe material are provided, and the joint body provided with the sleeve part at the time of disassembly receives the pipe material. It has a feature to prevent it from falling off from the side end. A cleaning head is provided at the tip of the pipe material, and the cleaning tool is disclosed using the splittable pipe material as a grip.

Japanese Unexamined Patent Publication No. 2012-201211

According to Patent Document 1, a long grip (handle) is composed of two disassembleable pipe materials. This is for convenience in carrying and storing, and it is necessary to connect two pipe materials at the time of use. When connecting two pipe materials, Patent Document 1 is for preventing the two pipe materials from rotating around the axis and also preventing swinging in a direction orthogonal to the axis. Then, a joint body having a sleeve portion as a member separate from the pipe material is interposed. Therefore, the number of parts is large and the structure is complicated. It is convenient to connect two pipe materials directly without using a joint body as a separate member, but the weight of the head part connected to the grip is heavy, for example, a hoe, a shovel, etc. As it becomes, it is necessary to take sufficient measures to prevent rotation around the axis when both are connected and to prevent swinging in the direction orthogonal to the axis, without using a joint body as a separate member. It's not easy to achieve.

The present invention has been made in view of the above, and it is possible to directly connect a plurality of long members without interposing a separate member between them, the number of parts is small as compared with the conventional case, and the structure is simple. To provide a joint structure and a tool using the joint structure that can achieve both prevention of rotation around the axis when both are connected and prevention of swing in the direction orthogonal to the axis. Is the subject.

In order to solve the above problems, the joint structure of the present invention
It is a joint structure that removably connects multiple long members along the longitudinal direction.
Two projecting pieces formed in a bifurcated shape at the connection side end of one of the plurality of members to be connected, and a plurality of members hung at different positions between the facing surfaces of the projecting pieces. A first joint portion having a connecting shaft of the above and a lock shaft provided so as to appear and disappear in a gap between the facing surfaces from the base side of the protruding piece.
An insertion portion provided at the connection side end of the other member connected to the one member, inserted into the gap between the facing surfaces of the protruding pieces, and the movement around the axis is restricted by the facing surfaces. And a second joint portion formed so as to be cut out along the longitudinal direction from the tip edge of the insertion portion and having a plurality of connecting grooves in which the plurality of connecting shafts are engaged with each other.
At the time of connection, the lock shaft is inserted into a connecting groove near the opening end that opens at the tip edge of the insertion portion among the plurality of connecting grooves, and the protruding piece is said to have a facing direction with respect to each facing surface. It is characterized in that the movement of one member and the other member in the radial direction is restricted.

The plurality of connecting shafts of the first joint portion are composed of first and second connecting shafts laid at different positions between the facing surfaces of the protruding pieces.
The plurality of connecting grooves of the second joint portion are formed at positions adjacent to the first connecting groove that opens on the tip edge side of the insertion portion and the first connecting groove with a partition wall portion provided with a communication portion. It consists of a second connecting groove.
It is preferable that the second connecting shaft is inserted into the second connecting groove via the communicating portion, and the first connecting shaft is inserted into the first connecting groove.

It is preferable that the plurality of long members are connected to each other to form a grip of a tool.

Further, the tool of the present invention is
In a tool where a long grip is connected to the head part
The grip is composed of a plurality of elongated members removably connected along the longitudinal direction, and the plurality of elongated members are characterized in that they can be connected by the above-mentioned joint structure.

According to the present invention, the insertion portion of the second joint portion provided on the other member to be connected is inserted into the gap between the facing surfaces of the protruding pieces of the first joint portion provided on one member to be connected. Since it is configured to be inserted, even if it tries to rotate relative to the axis, it is restricted by the outer surface of the insertion portion coming into contact with each facing surface of each protruding piece. Further, by inserting the lock shaft provided in the first joint portion into the first connecting groove of the second joint portion, the swing in the direction orthogonal to the axis is prevented. Therefore, in the present invention, a plurality of long members can be directly, reliably and easily connected to each other along the longitudinal direction without interposing a separate member, and the number of parts is smaller and the structure is smaller than the conventional one. Simple and convenient.

FIG. 1A is a perspective view showing a tool (hoe) according to an embodiment of the present invention, and FIG. 1B is an exploded perspective view of a grip. FIG. 2A is an enlarged view of a main part of FIG. 1A for explaining the joint structure. FIG. 3 is a perspective view showing a first joint portion and a second joint portion constituting the joint structure. 4A and 4B are views showing a first joint portion, where FIG. 4A is a plan view, FIG. 4B is a front view, and FIG. 4C is a side view. 5A and 5B are views showing a second joint portion, where FIG. 5A is a plan view, FIG. 5B is a front view, and FIG. 5C is a side view. 6 (a) to 6 (c) are diagrams for explaining the procedure for connecting the first joint portion and the second joint portion. 7A and 7B are views showing other examples of tools, in which FIG. 7A shows a rake head portion, FIG. 7B shows a square scoop, and FIG. 7C shows a sword scoop. 8A and 8B are views showing the appearance of a storage case for accommodating tools, where FIG. 8A is a perspective view, FIG. 8B is a plan view, FIG. 8C is a front view, and FIG. 8D is a side view. 9A and 9B are views showing the inside of the storage case, where FIG. 9A is a perspective view, FIG. 9B is a front view, and FIG. 9C is a side view.

Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. 1 and 2 are views showing an example of a tool 20 to which the joint structure 10 according to the embodiment of the present invention is applied, and FIGS. 3 to 5 are views showing the joint structure. The type of tool 20 to which the joint structure 10 of the present embodiment is applied is not limited, and for example, the hoe shown in FIGS. 1 and 2 or the farm tool such as a rake or a scoop exemplified in FIG. 7 is used. , Tools, cleaning tools, etc.

The tool 20 shown in FIG. 1 is a hoe, and has a head portion 20A that functions as a hoe and a grip 200 to which the head portion 20A is attached to the tip. The grip 200 has a predetermined length and is made of a long rod-shaped member formed in a substantially circular cross section. A general grip is composed of one rod-shaped member, but the grip 200 of the present embodiment can be divided in consideration of convenience at the time of carrying and storing. In this embodiment, the grip 200 is divided into three parts. Of the three long members constituting the divided grip 200, a joint structure 10 is provided between one member adjacent to each other in the longitudinal direction and the other member.

The "one member" defined in the claims refers to a member provided with the first joint portion 110, which will be described later, in the relationship between two members to be connected adjacent to each other in the longitudinal direction, and "the other member". "" Refers to the one provided with the second joint portion 120. For example, in the example of FIG. 1, the member (tip long member) 201 to which the head portion 20A is attached to the tip portion 201a has a second joint portion 120 provided at the rear end portion 201b, so that the member is designated as the “other member”. Correspondingly, the member (intermediate long member) 202 adjacent to the long tip member 201 is provided with the first joint portion 110 at the tip portion 202a, and therefore, in relation to the long tip member 201, "one member". Is equivalent to. Further, the member (rear end long member) 203 connected to the rear end portion 202b of the intermediate long member 202 is provided with a first joint portion 110 at the tip end portion 203a, and the rear end of the intermediate long member 202 is provided. It is connected to the second joint portion 120 provided in the portion 202b. Therefore, in the relationship between the intermediate long member 202 and the rear end long member 203, the intermediate long member 202 corresponds to the "other member", and the rear end long member 203 corresponds to the "one member".

Next, the joint structure 10 will be described in more detail mainly with reference to FIGS. 2 to 6, but for convenience of explanation, the joint structure 10 between the two members of the tip long member 201 and the intermediate long member 202 will be described. Let's take an example.

As described above, the joint structure 10 is composed of a combination of the first joint portion 110 and the second joint portion 120, and the first joint portion 110 is the tip portion of the intermediate long member 202 (with the tip long member 201). The second joint portion 120 is provided at the rear end portion (connection side end portion with the intermediate long member 202) 201b of the tip long member 201.

As shown in FIGS. 3 and 4, the first joint portion 110 has protruding pieces 111 and 111 protruding in a bifurcated manner from the tip portion 202a of the intermediate long member 202. The projecting pieces 111 and 111 are formed in a substantially circular shape in a side view (see FIG. 4C), and the first connecting shaft 112 and the second connecting shaft 113 are formed between the facing surfaces 111a and 111a of the projecting pieces 111 and 111. It has been handed over. The first connecting shaft 112 and the second connecting shaft 113 engage with the first connecting groove 122 and the second connecting groove 123 of the second joint portion 120, which will be described later, and swing in a direction orthogonal to the longitudinal direction of the grip 200. It is provided more than once to prevent. More specifically, the first connecting shaft 112 is hung near the center of the facing surfaces 111a and 111a, and the axis of the second connecting shaft 113 protrudes from the first connecting shaft 112 in a side view. Positions of the pieces 111, 111 that are closer to the tip edges 111b, 111b and offset to either the upper or lower position (in this embodiment, as shown in FIGS. 3 and 4B), the positions are slightly offset to the lower edge 111c side. ) Has been handed over. Further, the second connecting shaft 113 has a diameter smaller than that of the first connecting shaft 112.

The first joint 110 further has a lock shaft 115. The lock shaft 115 can appear and disappear from the end wall surface 114a of the gap 114 between the facing surfaces 111a and 111a, which is the base side of the protruding pieces 111 and 111, toward the gap 114. Specifically, a shaft insertion hole 116 having a predetermined depth is provided from the end wall surface 114a along the axis of the intermediate long member 202, and the shaft insertion hole 116 is elastically urged by the spring member. Has been done. In the present embodiment, the coil spring 117 is arranged in the shaft insertion hole 116 to repel and urge, and a part of the lock shaft 115 protrudes from the shaft insertion hole 116 and is normally positioned in the gap 114. There is. The lock shaft 115 is provided with a protrusion 115a projecting in the outer peripheral direction, and the protrusion 115a projects to the outer peripheral surface through a slit (not shown) formed in the intermediate long member 202 and is connected to the operation button 118. .. When the operation button 118 is pulled toward the rear end portion 202b while a part of the lock shaft 115 is located in the gap 114, the lock shaft 115 is accommodated in the shaft insertion hole 116. Further, the lock shaft is formed with a diameter that can be inserted into the first connecting groove 122 of the second joint portion 120, which will be described later.

The second joint portion 120 provided at the rear end portion 201b of the long tip member 201 has an insertion portion 121 as shown in FIGS. 3 and 5. The insertion portion 121 is formed in a substantially circular shape in a side view (see FIG. 5C), and is inserted and arranged in the gap 114 between the facing surfaces 111a and 111a of the pair of protruding pieces 111 and 111 of the first joint portion 110. Will be set up. The width of the insertion portion 121 is substantially the same as the distance between the facing surfaces 111a and 111a of the pair of protruding pieces 111 and 111 of the first joint portion 110, but is slightly smaller, and faces the facing surfaces 111a and 111a. The outer side surfaces 121a and 121a are substantially flat surfaces like the facing surfaces 111a and 111a. Therefore, even when the insertion portion 121 is arranged in the gap 114 and an external force is applied to the intermediate long member 202 in the direction of relatively rotating the tip long member 201 around the axis, the outside is applied. Since the side surfaces 121a and 121a are in contact with the facing surfaces 111a and 111a, the relative rotation of the long tip member 201 around the axis is prevented. The tip long member 201 can operate in the direction orthogonal to the intermediate long member 202 in the longitudinal direction, because the outer surfaces 121a, 121a of the insertion portion 121 face the projecting pieces 111, 111, 111a, 111a. It is restricted to the direction of rotation (arrows A1 and A2 in FIG. 3) only.

The insertion portion 121 has a plurality of connecting grooves formed so as to be cut out along the longitudinal direction from the tip edge 121b thereof. In the present embodiment, two connecting grooves 122 and a second connecting groove 123 are formed. The first connecting groove 122 is formed so as to be cut out to a predetermined depth along the longitudinal direction so that the opening end 122b opens to the tip edge 121b and the side portion is opened to the outer surfaces 121a and 121a. There is. The groove width X1 of the first connecting groove 122 (distance between the facing pieces 122d and 122d facing each other across the first connecting groove 122 (see FIG. 5C)) is substantially the same as the diameter of the first connecting shaft 112. It has become. Then, in the insertion portion 121, the facing direction of the facing pieces 122d and 122d (B direction in FIG. 3) is the facing direction of the facing surfaces 111a and 111a of the two protruding pieces 111 and 111 of the first joint portion 110 (FIG. 3). It is inserted between the projecting pieces 111 and 111 in a direction orthogonal to the C direction of the above.

The second connecting groove 123 is formed adjacent to the inner side of the first connecting groove 122 (the rear end portion 202b side of the intermediate long member 202) across the partition wall portion 124. A communication portion 124a through which the second connecting shaft 113 having a relatively small diameter can pass is formed in the partition wall portion 124, and the second connecting shaft 123 inserted from the first connecting groove 122 side passes through the communication portion 124a. It is inserted and arranged in the second connecting groove 123. The communication portion 124a is formed on the groove center P (see FIGS. 5 (c) and 6 (a)) of the first connecting groove 122.

The groove width X2 of the second connecting groove 123 is substantially the same as the diameter of the second connecting shaft 113, and has a width narrower than that of the first connecting groove X1. Further, the second connecting groove 123 is viewed from the side surface as compared with the communication portion 124a located on the groove center P of the first connecting groove 122 in accordance with the relative position of the second connecting shaft 113 with respect to the first connecting shaft 112. The position of the groove bottom surface 123a is deep in the circumferential direction and is lower than the groove bottom surface 122a of the first connecting groove 122 (see FIG. 5C).

The joint structure 10 of the present embodiment is used as follows. When connecting the long tip member 201 and the intermediate long member 202, along the virtual line Q connecting the centers of the first connecting shaft 112 and the second connecting shaft 113 of the first joint portion 110 shown in FIG. 6A. Then, from diagonally downward, the insertion portion 121 of the second joint portion 120 is inserted into the gap 114 of the first joint portion 110 from the tip edges 111b and 111b of the protruding pieces 111 and 111. When inserting the insertion portion 121, the first connecting shaft 112 is inserted into the first connecting groove 122. Then, since the groove width X1 of the first connecting groove 122 is substantially the same as the diameter of the first connecting shaft 112, the center of the first connecting shaft 112 and the second connecting shaft 113 is located at the groove center P of the first connecting groove 122. The virtual line Q passing between them is automatically aligned. Since the communication portion 124a is formed on the groove center P of the first connection groove 122, if it is inserted as it is, the second connection shaft 113 passes through the communication portion 124a. At this time, the lock shaft 115 projects into the gap 114 of the first joint portion 110, but in the process of inserting the insertion portion 121, the substantially arcuate tip edge 121b of the insertion portion 121 hits the lock shaft 115. It touches and is pushed into the shaft insertion hole 116 (see FIG. 6 (b)).

Next, the second connecting shaft 113 that has passed through the communication portion 124a rotates the tip long member 201 by a predetermined angle in a direction orthogonal to the longitudinal direction in a direction close to the groove bottom surface 123a of the second connecting groove 123 (FIG. 6 (FIG. 6). b) See). Then, since the open end of the first connecting groove 122 faces the lock shaft 115, the lock shaft 115 is urged by the coil spring 117 and protrudes from the shaft insertion hole 116, and a part of the lock shaft 115 is inserted in the first connecting groove 122. It is inserted (see FIGS. 6 (c) and 2). As a result, the long tip member 201 is locked from being rotated in the directions orthogonal to the longitudinal direction (directions A1 and A2 in FIG. 3).

By being connected in this way, the tip long member 201 and the intermediate long member 202 do not rotate relative to the axis and do not swing in the direction orthogonal to the longitudinal direction. .. Therefore, according to the present embodiment, only the second joint portion 120 provided on the tip long member 201 and the first joint portion 110 provided on the intermediate long member 202 are connected to each other, and the two joint portions are straddled. It can be connected securely and easily without using a separate member. Therefore, the head portion 20A is suitable as a grip 200 for agricultural tools and the like having a predetermined weight.

The long tip member 201 and the long intermediate member 202 are connected as described above and used as one grip 200, but after use, for example, 1000 in a storage case as shown in FIGS. 8 and 9. , Each is removed and housed. When removing the operation button 118, move the operation button 118 to the other end 202b side of the intermediate long member 202 by hand. As a result, the lock shaft 115 is separated from the first connecting groove 122. With the lock shaft 115 detached from the first connecting groove 122, the long tip member 201 is slightly rotated in the direction opposite to that at the time of connection, and the position of the second connecting shaft 113 is set to the groove bottom surface 123a of the second connecting groove 123. The state is changed from the state of FIG. 6 (c) to the state of FIG. 6 (b) by moving in a direction away from the communication portion 124a. Next, when the long tip member 201 is pulled diagonally downward in FIG. 6A, the second connecting shaft 113 passes through the communication portion 124a, and the first connecting shaft 112 and the second connecting shaft 113 are seconded. 1 Disengage from the connecting groove 122. In this way, it is extremely easy to disconnect the two.

A procedure for connecting the first joint portion 110 on the front end portion 203a side of the rear end long member 203 to the second joint portion 120 on the rear end portion 202b side of the intermediate long member 202, and a procedure for disconnecting the connection. Is the same as above.

Here, the storage case 1000 shown in FIGS. 8 and 9 can accommodate a plurality of tools 20 such as a hoe, a shovel, and a rake, and is separately accommodated in the head portion 20A and the grip 200. The grip 200 is divided into a plurality of long members. As described above, the grip 200 is used by connecting a plurality of divided long members, but since a plurality of tools 20 are not always used at the same time, the divided long members serving as the grip 200 are used. Can be a smaller number than the type of head portion 20A. That is, by sharing the grip 200, it is possible to save the storage space. In the present embodiment, since the long member in the divided state can be quickly connected to the head portion 20A to form the grip 200, even if the divided members are stored in this way, the work can be started promptly as needed. Can be done.

10 Joint structure 110 First joint portion 110
111 Protruding piece 112 1st connecting shaft 113 2nd connecting shaft 114 Gap 115 Lock shaft 116 Shaft insertion hole 120 2nd joint 121 Insertion 122 1st connecting groove 123 2nd connecting groove 124 Bulk partition 124a Communication part 20 Tool 20A Head Part 200 Grip 201 Tip long member 202 Intermediate long member 203 Rear end long member

Claims (4)

It is a joint structure that removably connects multiple long members along the longitudinal direction.
Two projecting pieces formed in a bifurcated shape at the connection side end of one of the plurality of members to be connected, and a plurality of members hung at different positions between the facing surfaces of the projecting pieces. A first joint portion having a connecting shaft of the above and a lock shaft provided so as to appear and disappear in a gap between the facing surfaces from the base side of the protruding piece.
An insertion portion provided at the connection side end of the other member connected to the one member, inserted into the gap between the facing surfaces of the protruding pieces, and the movement around the axis is restricted by the facing surfaces. And a second joint portion formed so as to be cut out along the longitudinal direction from the tip edge of the insertion portion and having a plurality of connecting grooves in which the plurality of connecting shafts are engaged with each other.
At the time of connection, the lock shaft is inserted into a connecting groove near the opening end that opens at the tip edge of the insertion portion among the plurality of connecting grooves, and the protruding piece is said to have a facing direction with respect to each facing surface. A joint structure characterized in that the movement of one member and the other member in the radial direction is restricted. The plurality of connecting shafts of the first joint portion are composed of first and second connecting shafts laid at different positions between the facing surfaces of the protruding pieces.
The plurality of connecting grooves of the second joint portion are formed at positions adjacent to the first connecting groove that opens on the tip edge side of the insertion portion and the first connecting groove with a partition wall portion provided with a communication portion. It consists of a second connecting groove.
The joint structure according to claim 1, wherein the second connecting shaft is inserted into the second connecting groove via the communicating portion, and the first connecting shaft is inserted into the first connecting groove. The joint structure according to claim 1 or 2, wherein the long plurality of members are connected to each other to form a grip of a tool. In a tool where a long grip is connected to the head part
The grip comprises a plurality of elongated members that are detachably connected along the longitudinal direction, and the plurality of elongated members can be connected by the joint structure according to any one of claims 1 or 2. A tool characterized by being.

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