JP4685347B2 - Connecting structure of rod - Google Patents

Description

  The present invention relates to a connecting structure of rods.

As described in Patent Documents 1 and 2, as the connecting structure of the rod of the cleaning tool handle, the handle handle, etc., when the first rod and the second rod are connected by male-female connection, the radial direction of the first rod An engagement protrusion that is repelled by the first rod is provided on the peripheral surface of the first rod, and an engagement hole that engages and locks the engagement protrusion of the first rod on the peripheral surface of the second rod; Some of them are provided with a guide groove extending from the front end edge to the engagement hole so as to be guided. Both rods are connected by guiding the engaging protrusion of the first rod while pushing it up by the guide groove of the second rod and elastically engaging and locking it in the engaging hole of the second rod.
JP2001-317513 JP2003-102664

The conventional techniques of Patent Documents 1 and 2 have the following problems.
(1) The first rod and the second rod are maintained in the connected state by the engagement locking of the engagement protrusions and the engagement holes, but between the protrusions and the holes in the engagement relationship. Inevitably with a gap. For this reason, the 1st rod and the 2nd rod produce the play of the axial direction and the circumferential direction based on those gaps in the connected state.

  (2) The engaging protrusion of the first rod is pushed up by the guide groove of the second rod and accumulates an elastic force, and then is elastically fitted and locked into the engaging hole of the second rod. For this reason, the engagement depth of the engagement protrusion with respect to the engagement hole cannot be made larger than the height at which the engagement protrusion pushes up the guide groove and gets over the guide groove, and is relatively small. Also by this, the 1st rod and the 2nd rod are easy to produce backlash in those axial directions and the peripheral direction in a connection state.

  An object of the present invention is to connect both rods without play when the first rod and the second rod are connected by male-female connection.

According to the first aspect of the present invention, when the first rod and the second rod made of pipe material are connected by male-female connection, the engagement protrusions that are repelled in the radial direction of the first rod are arranged around the circumference of the first rod. And an engagement hole into which the engagement protrusion of the first rod is fitted and locked on the peripheral surface of the second rod, and is extended from the tip edge portion to the engagement hole so as to guide the engagement protrusion. A rod connecting structure provided with a guide groove, wherein one of the first rod and the second rod is provided with a rib for preventing rotation of the ridge, and the other is provided with a notch for preventing rotation. The front end surface that engages with the notch for rotation prevention is arcuate, or the lateral width is narrowed toward the front end, and the engagement protrusion of the first rod is fitted and locked into the engagement hole of the second rod. , Non-rotating ribs and non-rotating notches on both rods can be engaged in the axial and circumferential directions of both rods without any gaps And will it, in which as the guide groove is also used to notch for preventing rotation.

Example 1
FIG. 1 shows that a first rod 10 and a second rod 20 constituting a part of a handle of a cleaning tool are inserted into each other through a coupling tool 30 provided on the first rod 10, and are connected by male and female fitting. To do. In addition, the 2nd rod 20 comprises the front-end | tip part of a handle | pattern, and is provided with the cleaning head attaching part 20A.

  The first rod 10 is made of a pipe material. As shown in FIG. 2A, the first rod 10 is provided with a peripheral wall on one end side of the pipe material with an attachment hole 11 for the connector 30 penetrating, and on the one end side of the pipe material. Non-rotating cutouts 12 are provided at a plurality of circumferential positions on the front end edge (in this embodiment, two positions spaced apart by 180 degrees, but a single position is also acceptable). The non-rotating notch 12 has a U-shape that opens outward in the axial direction.

  As shown in FIG. 2 (B), the connector 30 assembled to the first rod 10 has a generally straight shape (straight portion 30A) and is directed outward in the axial direction to a substantially half-circumferential portion on the base end side. It consists of a short cylinder material provided with the expansion part 31 expanded in a taper shape. The connector 30 is provided with an engagement protrusion 33 on the inner surface of the straight portion 30 </ b> A that is the inner periphery on the proximal end side and that faces the spread portion 31. The connector 30 includes a slit 34 that passes through the opposing portion of the engaging protrusion 33 in the circumferential direction of the straight portion 30A and extends over the entire length of the straight portion 30A. The connector 30 is assembled to the outer periphery on the one end side of the first rod 10 in a state where the engagement protrusion 33 is fitted in the attachment hole 11. The connector 30 is engaged with the outer periphery of the first rod 10 in a free state assembled to the first rod 10 by the elastic diameter reduction behavior of both side walls divided by the slits 34 with almost no gap. The protrusion 33 protrudes inward in the radial direction of the first rod 10 from the mounting hole 11, and the widened portion 31 is separated from the outer peripheral surface of the first rod 10 (FIG. 3).

  When the expanding portion 31 is drawn to the outer peripheral surface of the first rod 10 in the state of being assembled to the first rod 10, the connecting tool 30 holds both side walls sandwiching the slit 34 to the outer periphery of the first rod 10. It is elastically widened and deformed as it is, and the amount of protrusion of the engaging projection 33 from the mounting hole 11 inward in the radial direction of the first rod 10 is reduced. The elastic force to be projected again inward in the radial direction of 10 is temporarily stored (FIG. 5). In other words, the first rod 10 is provided with the engagement protrusion 33 that is elastically urged inward in the radial direction on the inner peripheral surface of the first rod 10 in a state where the connector 30 is assembled.

  The second rod 20 is made of a pipe material, and, as shown in FIG. 2C, penetrates the engagement hole 21 into which the engagement protrusion 33 of the first rod 10 is fitted and locked into the peripheral wall on one end side of the pipe material. And a guide groove 22 extending from the tip edge portion to the engagement hole 21 so as to guide the engagement protrusion 33 is provided on the outer peripheral surface. The groove width of the guide groove 22 is set to a size that allows the lateral width of the engagement protrusion 33 (the width along the circumferential direction of the first rod 10) to be fitted without play. The guide groove 22 can gradually displace the engaging protrusion 33 outward in the radial direction during the insertion process of the first rod 10 and the second rod 20 (the expanding portion 31 is gradually formed on the outer peripheral surface of the first rod 10. A tapered groove bottom surface (FIG. 5).

  The second rod 20 has a plurality of circumferential positions on the outer peripheral surface (side away from the tip edge in the axial direction) from the engagement hole 21 on one end side of the pipe material (two positions spaced 180 degrees in this embodiment). However, a rib 23 for preventing rotation of the ridge is provided at a single position). The anti-rotation rib 23 has a U-shape that fits in the U-shaped anti-rotation notch 12 of the first rod 10 without a gap. As a result, the engagement protrusion 33 of the first rod 10 is fitted and locked in the engagement hole 21 of the second rod 20, and at the same time, the non-rotation notch 12 and the rotation prevention rib 23 of both the rods 10, 20 are both The rods 10 and 20 are set so as to be able to engage with each other in the axial direction and the circumferential direction.

  The anti-rotation rib 23 may have any shape that engages with the anti-rotation notch 12 at least in the circumferential direction. However, as shown in FIG. It can be arcuate, or the lateral width can be narrowed (tapered) toward the tip. Further, as shown in FIG. 7B, the rotation-preventing rib 23 can have a bottom surface wider than the top surface in a cross-sectional view.

  As the anti-rotation rib 23, the fitting surfaces of both may or may not be in close contact as long as the fitting surfaces of both can be fitted at least in the circumferential direction without gaps. Further, the rotation-preventing rib 23 can be fitted with no gap in the circumferential direction even if there is a slight error in the processing accuracy of the fitting surfaces of both. Further, as the rotation preventing rib 23, the fitting surfaces of the two are rubbed together and scraped together or elastically deformed to fit together without any gap in the circumferential direction.

Therefore, the 1st rod 10 and the 2nd rod 20 are connected in the following procedures.
(1) Insert the first rod 10 assembled with the connector 30 into the second rod 20 (FIGS. 3 and 4). When the tip inclined surface 33A of the engaging protrusion 33 of the first rod 10 and the tip inclined surface 22A of the groove bottom of the guide groove 22 of the second rod 20 come into contact with each other (FIG. 4), the engaging protrusion 33 starts guiding to the guide groove 22. Then, the first rod 10 and the second rod 20 are aligned in the circumferential direction.

  (2) When the first rod 10 and the second rod 20 are pushed in the axial direction, the engagement protrusion 33 of the first rod 10 is gradually pushed up on the tapered groove bottom surface of the guide groove 22 of the second rod 20. Then, after accumulating the elastic force, it climbs over the groove bottom surface and elastically falls into the engagement hole 21 of the second rod 20 and is engaged and locked (FIGS. 5 and 6).

(3) When the engaging protrusion 33 of the first rod 10 is elastically dropped into the engaging hole 21 of the second rod 20 in the above (2), the anti-rotation is provided in the axial direction of the rods 10 and 20. It abutment so allowed to collide with the notch 12 in the detent rib 23.

  (4) When separating the first rod 10 and the second rod 20, the expanding portion 31 of the connector 30 is pulled toward the outer peripheral surface of the first rod 10 by the operator's fingers, and the engaging protrusion 33 is moved to the second rod 20. And the second rod 20 is pulled out. When the finger is released, the connector 30 is re-attached to the first rod 10 due to the elastic contraction habit.

According to the present embodiment, the following operational effects can be obtained.
(a) At the insertion end of the first rod 10 and the second rod 20, the engagement protrusion 33 of the first rod 10 is fitted and locked in the engagement hole 21 of the second rod 20, and at the same time both the rods 10, 20. The anti-rotation rib 23 and the anti-rotation notch 12 are engaged with each other in the circumferential direction of the rods 10 and 20. In other words, the anti-rotation rib 23 and the anti-rotation mechanism are in a retaining state where the rods 10 and 20 are pulled in the axial direction with each other due to the engaging force with which the engaging protrusion 33 is elastically engaged with the engaging hole 21. The notches 12 engage with each other without gaps in the axial direction and with no gaps in the circumferential direction. Thereby, both the rods 10 and 20 will be connected without play in the axial direction and the circumferential direction.

(b) During the insertion process of the first rod 10 and the second rod 20, the engaging protrusion 33 of the first rod 10 is gradually pushed up on the tapered groove bottom surface of the guide groove 22 of the second rod 20. After accumulating the elastic force, it is elastically fitted and locked into the engagement hole 21 of the second rod 20. This resiliently such locking force acting in the axial direction of the rods 10 and 20, Ru is abut to allowed to collide detent rib 23 and detent notch 12.

  (c) Since the anti-rotation rib 23 has an arcuate front end surface that engages with the anti-rotation notch 12 or a width that decreases toward the front end, the anti-rotation rib 23 and the anti-rotation rib The engagement of the notch 12 is made smooth.

(Example 2)
FIG. 8 shows that the first rod 110 and the second rod 120 constituting a part of the handle of the cleaning tool are inserted into each other under the interposition of the connecting tool 130 assembled to the first rod 110, and the male and female are engaged. To be connected.

  The first rod 110 is made of a pipe material, and is provided with an annular mounting groove 111A and a mounting hole 111B for the connector 130 on the peripheral wall on one end side of the pipe material, and on the back side from the mounting hole 111B on one end side of the pipe material. A rib 112 for preventing the rotation of the ridge is provided.

  The coupling tool 130 assembled to the first rod 110 includes a C-shaped engagement ring 131 that can be held in a range wider than the half circumference of the mounting groove 111A of the first rod 110 with a resilient reduction in diameter and almost without a gap. , And an arc-shaped operation ring 132 that is pin-coupled to both ends of the engagement ring 131. In the state where the connector 130 is assembled to the first rod 110, the engagement protrusion 133 provided at the center in the circumferential direction of the inner surface of the engagement ring 131 is inserted into the radial direction of the first rod 110 from the mounting hole 111 </ b> B. The operation ring 132 is separated from the mounting groove 111A of the first rod 110 outward in the radial direction. When the operation ring 132 is drawn to the mounting groove 111A in the state where it is assembled to the first rod 110, the coupling tool 130 is elastic while the both side walls of the engagement ring 131 are held around the outer periphery of the mounting groove 111A. The engagement protrusion 133 reduces the amount of protrusion in the radial direction of the first rod 110 from the mounting hole 111B, and at the same time, the engagement protrusion 133 is moved from the mounting hole 111B in the radial direction of the first rod 110. Temporarily store the resilience to try to project inward again. That is, the first rod 110 is provided with an engagement protrusion 133 that is elastically radiated inward in the radial direction in a state in which the coupler 130 is assembled.

  The second rod 120 is made of a pipe material, and includes an engagement hole 121 through which the engagement protrusion 133 of the first rod 110 is fitted and locked through the peripheral wall on one end side of the pipe material, and the engagement protrusion 133. A guide groove 122 extending from the front end edge to the engagement hole 121 so as to be guided is provided on the outer peripheral surface. The groove width of the guide groove 122 is set to a size that allows the lateral width of the engagement protrusion 133 (the width along the circumferential direction of the first rod 110) to be fitted without play. The guide groove 122 is a taper that can gradually displace the engaging protrusion 133 outward in the radial direction during the insertion process of the first rod 110 and the second rod 120 (the operation ring 132 is gradually pulled toward the mounting groove 111A). A shaped groove bottom may be provided.

  The second rod 120 is provided with a notch 123 for rotation prevention on one end side of the pipe material. The non-rotating notch 123 is also used as the guide groove 122 in this embodiment, and fits into the non-rotating rib 112 of the first rod 110 without a gap. As a result, the engaging protrusion 133 of the first rod 110 is fitted and locked in the engaging hole 121 of the second rod 120, and at the same time, the anti-rotation rib 112 and the anti-rotation notch 123 of both rods 110, 120 are both The rods 110 and 120 are set so that they can be engaged with each other in the circumferential direction.

Accordingly, the first rod 110 and the second rod 120 are connected in the following procedure.
(1) Insert the first rod 110 assembled with the connector 130 into the second rod 120 (FIG. 9). When the front end slope 133A of the engagement protrusion 133 of the first rod 110 and the front end slope 122A of the groove bottom of the guide groove 122 of the second rod 120 contact each other, the engagement protrusion 133 starts to be guided to the guide groove 122. The rod 110 and the second rod 120 are aligned in the circumferential direction.

  (2) When the first rod 110 and the second rod 120 are pushed forward in the axial direction, the engagement protrusion 133 of the first rod 110 is pushed up on the groove bottom surface of the guide groove 122 of the second rod 120 and is elastic. After the force is applied, it climbs over the bottom surface of the groove and falls into the engagement hole 121 of the second rod 120 to be fitted and locked (FIG. 10).

(3) In the above (2), when the engagement protrusion 133 of the first rod 110 is elastically dropped into the engagement hole 121 of the second rod 120, the rotation of the rods 110, 120 in the axial direction It abutment so allowed to collide with the rib 112 in the detent notch 123.

  (4) When the first rod 110 and the second rod 120 are separated, the operation ring 132 of the connector 130 is pulled toward the outer peripheral surface of the first rod 110 by the operator's fingers, and the engagement protrusion 133 is moved to the second rod 120. The second rod 120 is pulled out from the engagement hole 121. When the finger is released, the connector 130 is re-attached to the first rod 110 due to the elastic diameter-reducing behavior.

According to the present embodiment, the following operational effects can be obtained.
(a) At the insertion ends of the first rod 110 and the second rod 120, the engagement protrusion 133 of the first rod 110 is fitted and locked in the engagement hole 121 of the second rod 120, and at the same time, both the rods 110, 120 The rotation prevention notch 123 and the rotation prevention rib 112 are engaged with each other in the circumferential direction of the rods 110 and 120. That is, the non-rotating notch 123 and the non-rotating stop are provided in a retaining state in which the rods 110 and 120 are pulled in the axial direction with each other due to the engaging force with which the engaging protrusion 133 is elastically fitted into the engaging hole 121. The ribs 112 engage with each other without a gap. Thereby, both rods 110 and 120 are connected without play.

(b) In the process of inserting the first rod 110 and the second rod 120, the engagement protrusion 133 of the first rod 110 is pushed up on the groove bottom surface of the guide groove 122 of the second rod 120 to generate elasticity. After the accumulation, the second rod 120 is elastically fitted and locked into the engagement hole 121. This resiliently such locking force acting in the axial direction of the rods 110, 120 Ru is abut to allowed to collide detent notch 123 and detent rib 112.

  (c) By using the guide groove 122 provided in the second rod 120 as the non-rotating cutout 123, the processing and structure can be simplified.

  In the present invention, the engagement protrusion provided on the first rod may be incorporated in the first rod itself.

FIG. 1 is a perspective view showing a rod coupling structure of the first embodiment. 2A and 2B show a rod and a connecting part, where FIG. 2A is a sectional view showing a first rod, FIG. 2B is a sectional view showing a connecting tool, and FIG. 2C is a sectional view showing a second rod. FIG. 3 shows a state before connection of the first rod and the second rod, (A) is a sectional view, and (B) is a plan view. 4A and 4B show an initial connection process of the first rod and the second rod, where FIG. 4A is a sectional view and FIG. 4B is a plan view. 5A and 5B show an intermediate process of connecting the first rod and the second rod, where FIG. 5A is a sectional view and FIG. 5B is a plan view. 6A and 6B show a connected state of the first rod and the second rod, where FIG. 6A is a sectional view and FIG. 6B is a plan view. FIG. 7 is a schematic view showing a modified example of the rotation prevention rib and the rotation prevention notch. FIG. 8 is a perspective view showing a rod connection structure according to the second embodiment. FIG. 9 is a cross-sectional view showing a state before the first rod and the second rod are connected. FIG. 10 is a sectional view showing a connected state of the first rod and the second rod.

Explanation of symbols

10, 110 First rod 12, 123 Non-rotating notch 20, 120 Second rod 21, 121 Engaging hole 22, 122 Guide groove 23, 112 Anti-rotating rib 33, 133 Engaging protrusion

Claims (1)

When connecting the first rod and the second rod made of pipe material by male-female connection,
While providing an engagement protrusion that is elastic in the radial direction of the first rod on the peripheral surface of the first rod,
An engagement hole into which the engagement protrusion of the first rod is fitted and locked is provided on the peripheral surface of the second rod, and a guide groove extending from the tip edge portion to the engagement hole is provided so as to guide the engagement protrusion. A rod connecting structure,
One of the first rod and the second rod is provided with a rib for preventing rotation of the protrusion, and the other is provided with a notch for rotation prevention. The rotation prevention rib has an arcuate tip end surface engaged with the rotation prevention notch, Alternatively, the lateral width is narrowed toward the tip, and the engaging protrusions of the first rod are fitted and locked in the engaging holes of the second rod, and at the same time, the anti-rotation ribs and the anti-rotation notches of both rods are provided. It becomes possible to engage with each other without any gap in the axial direction and circumferential direction of both rods ,
A rod connecting structure in which the guide groove is also used as a notch for rotation prevention .

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