JP3127420U - Holder device - Google Patents

Abstract

The present invention provides a holder device capable of effectively obtaining a contact area of an inner peripheral surface of each holder with respect to a handle and realizing a good tightening state.
SOLUTION: A first holder H1 and a second holder H2 capable of sandwiching a cylindrical handle 4 and a fastening member H3 for fastening the holders H1, H2 to each other are provided, and inner circumferences of the holders H1, H2 are provided. Abutting arc surfaces H11a and H21a in which the centers of curvature are shifted from the centers of curvature of other portions are provided on the surfaces H11 and H21, respectively.
[Selection] Figure 5

Description

  The present invention relates to a holder device for fixing a fixed object whose outer peripheral surface is circular in cross section.

Conventionally, as an aspect of fixing a pipe-like member such as a handle using a pair of holders, each holder is provided with an inner peripheral surface that can be fitted to the outer peripheral surface of the handle, and between these inner peripheral surfaces. There is known a mode in which the holders are fastened with a fastening member such as a bolt while the handle is sandwiched (see, for example, Patent Document 1).
No. 1-332511

  However, although the conventional one is set so that the entire inner peripheral surface of each holder is in contact with the outer peripheral surface of the handle, since there is a tolerance in the handle, the entire inner peripheral surface of each holder is In actuality, it is extremely difficult to make contact with each other. Actually, a part of the inner peripheral surface of each holder comes into contact with a line along a line parallel to the axial direction of the handle. In order to prevent wobbling, the holders are strongly tightened with a plurality of tightening members such as screws, and the handle or the holder is slightly deformed so that most of the inner peripheral surface of each holder is brought into contact with the outer peripheral surface of the handle. It has been implemented. However, when such an aspect is adopted, there is a problem that a strong tightening force is required, and it takes time and labor for the tightening work, and a plurality of tightening members are required, and the number of parts increases. Moreover, if the tightening force of each tightening member is unbalanced, there is a problem that the handle cannot be firmly fixed.

  The present invention has been made paying attention to such problems, and its main purpose is to effectively earn the contact area of the inner peripheral surface of each holder with respect to a fixed object such as a handle, and to achieve a good tightening state. It is providing the holder apparatus which can implement | achieve.

  That is, the holder device of the present invention includes a pair of holders that can hold a fixed object whose outer peripheral surface is circular in cross section, and a tightening member that tightens the holders, The circumferential surface is provided with a contact arc surface that shifts the center of curvature from the center of curvature of another part and contacts the fixed object in preference to the other part.

  In such a case, since the contact arc surface of each holder can be reliably contacted with the outer peripheral surface of the fixed object along the circumferential direction, the contact area can be effectively obtained, so that a weak tightening force However, the fixed object can be firmly held, and the fixed object can be prevented from wobbling. In addition, the tolerance of the fixed object can be absorbed by tightening with the holder having the inner peripheral surfaces with different axis centers.

  In particular, if the abutting arc surface forming part on the inner peripheral surface of one holder is different from the forming part of the abutting arc surface on the inner peripheral surface of the other holder, each abutting arc surface is surely secured. It can be brought into contact with the fixed object, and a stronger tightening state can be realized.

  In order to be able to perform the tightening operation and the tightening release operation easily and accurately, it is provided with engaging means for rotatably engaging the one end portions of the holders, and the other end portions of the holders are united with each other. The tightening member may be used for tightening.

  As a preferred embodiment, an embodiment in which each of the holders is an aluminum die cast product can be mentioned.

  As described above, according to the present invention, the contact area of the inner peripheral surface of each holder with respect to the fixed object can be effectively obtained, and a good tightening state can be realized.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the holder device H according to the present embodiment is applied to a brush cutter X, for example.

  The brush cutter X includes a prime mover 1, an operating rod 2 having a base end connected to the prime mover 1, a cutting blade 3 provided at a distal end portion of the operating rod 2, and a handle 4 provided at a predetermined portion of the operating rod 2. The handle 4 is fixed to the operating rod 2 via the holder device H.

  The handle 4 includes a handle body 41 that has a cylindrical cross section and is bent into a generally U shape or a U shape, and handle grips 42 provided at both ends of the handle body 41. It is fixed to the holder device H. The handle body 41 corresponds to the “fixed object” of the present invention.

  The holder device H includes a first holder H1 and a second holder H2 that can sandwich the handle main body 41, and a fastening member H3 that fastens the holders H1 and H2.

  As shown in FIGS. 2 and 3 (FIGS. 3A and 3B are a plan view of the first holder H1 and a view in the X direction of FIG. Further, a first inner peripheral surface H11 that can cover substantially half of the outer periphery of the handle body 41 is formed. The center of curvature is made different from the center of curvature of the other part of the first inner peripheral surface H11 at the substantially central part in the longitudinal direction of the first inner peripheral surface H11, and the handle main body 41 is given priority over other parts. A first abutting arcuate surface H11a that abuts is provided. Further, an engaged portion H12 that can be engaged with an engaging portion H22 of a second holder H2 to be described later is provided at one end portion of the first holder H1, and a fastening member H3 can be inserted at the other end portion. A first insertion hole H13 is provided. The engaged portion H12 functions as a rotation shaft when the first holder H1 and the second holder H2 are relatively rotated. An insertion allowable space H14 that allows insertion and rotation of the engaging portion H22 is formed between the engaged portion H12 and the first inner peripheral surface H11. Furthermore, the 1st fitting part H15 which can be fitted to the attachment member T for attaching the holder apparatus H to the operating rod 2 is provided in the bottom face part of the other end part. The 1st fitting part H15 makes the uneven | corrugated shape which provided the 1st convex part H15a with the predetermined pitch along the circumferential direction centering | focusing on the said 1st insertion hole H13.

  Here, the attachment member T will be described. The attachment member T is fixed to the operating rod 2 and has a second fitting portion (not shown) that can fit the first fitting portion H15 of the first holder H1 on the upper surface portion. A screw hole (not shown) that communicates with the first insertion hole H13 of the first holder H1 when the first fitting part H15 and the second fitting part are fitted to each other is formed at the center of the joint part. The second fitting portion is provided with second convex portions at a predetermined pitch along the circumferential direction around the screw hole. And the attachment attitude | position of the holder apparatus H with respect to the operating rod 2 and the handle | steering-wheel 4 can be changed by changing the fitting position of the 1st fitting part H15 of the 1st holder H1, and the 2nd fitting part.

  As shown in FIGS. 2 and 4 (FIGS. 4A and 4B are a plan view of the first holder H1 and a cross-sectional view taken along line YY in FIG. 4A), the second holder H2 has a bottom surface. A second inner peripheral surface H21 that can cover substantially half of the outer periphery of the handle main body 41 is formed in the part. The center of curvature is made different from the center of curvature of other parts of the second inner peripheral surface H21 at both ends in the longitudinal direction of the second inner peripheral surface H21, and the handle main body 41 is given priority over other parts. A second abutting arc surface H21a that abuts is provided. An engaging portion H22 that can be engaged with the engaged portion H12 of the first holder H1 is provided at one end of the second holder H2, and a fastening member H3 can be inserted into the other end. A second insertion hole H23 communicating with the first insertion hole H13 of the first holder H1 is provided. The engaging portion H22 has a partial arc shape in a side view protruding downward from other portions. In the present embodiment, the engaging portion H22 and the engaged portion H12 constitute the “engaging means HK” of the present invention.

  Moreover, the 1st holder H1 and the 2nd holder H2 are the things made from the aluminum die-casting shape | molded by a metal mold | die, The hollow part is formed in the predetermined part and the weight reduction is achieved.

  The tightening member H3 includes a shaft portion H31 in which a screw is threaded on the outer periphery, and an operation portion H32 provided at the base end portion of the shaft portion H31. On the base end side of the shaft portion H31, a pressing portion H31a that is larger in diameter than other portions and that presses against the upper surface of the second holder H2 during a tightening operation is provided.

  Next, a method and an operation for fixing the handle 4 using such a holder device H will be described with reference to FIG. 5 (in the figure, the state in which the handle 4 is fixed by the holder device H corresponds to FIG. 2B). Will be described with reference to FIG.

  First, in a state where the engaging portion H22 of the second holder H2 is engaged with the engaged portion H12 of the first holder H1, the first fitting portion H15 of the first holder H1 and the second fitting portion of the mounting member T. And the first holder H1 and the second holder H2 are temporarily set on the mounting member T. And while rotating the 2nd holder H2 in the direction away from the 1st holder H1 by making the to-be-engaged part H12 of the 1st holder H1 into a rotating shaft, on the 1st internal peripheral surface H11 of the open | released 1st holder H1 The handle body 41 is placed, and then the second holder H2 is rotated in the direction approaching the first holder H1. Thereby, the outer periphery of the handle body 41 is covered with the inner peripheral surfaces H11 and H21 of the holders H1 and H2. In this state, the second insertion hole H23 of the second holder H2, the first insertion hole H13 of the first holder H1, and the screw hole of the mounting member T are communicated in this order, and the shaft portion H31 of the tightening member H3 is connected. While inserting from the 2nd insertion hole H23, the front-end | tip part of the axial part H31 is screwed by the screw hole by giving the operation force which rotates the operation part H32 of the fastening member H3 in a predetermined direction. As a result, the pressing portion H31a provided on the shaft portion H31 presses the second holder H2, and the entire area of the first contact arc surface H11a and the second contact arc surface H21a is in the circumferential direction on the outer peripheral surface of the handle body 41. It abuts along (see FIG. 5). Specifically, among the handle main bodies 41 covered with the inner peripheral surfaces H11 and H21 of the holders H1 and H2, the first contact arc surface H11a contacts the central portion, and each second contact arc surface on both end portions. H21a contacts. The handle body 41 is firmly fixed by tightening the handle body 41 in a state where the first contact arc surface H11a and the second contact arc surface H21a are in contact with the outer peripheral surface of the handle body 41, respectively.

  Note that after the handle main body 41 is fitted to the first inner peripheral surface H11 of the first holder H1, the second holder H2 may be attached to the first holder H1 from above the handle main body 41, or the holder H1. The first holder H1 and the second holder H2 may be temporarily set on the mounting member T in a state where the handle body 41 is sandwiched between the inner peripheral surfaces H11 and H21 of H2.

  In the present embodiment, a single fastening member H3 is used to fasten the handle body 41 between the first holder H1 and the second holder H2, and the holders H1 and H2 can be attached to the attachment member T. I have to. When the operating force for rotating the operation portion H32 of the tightening member H3 in the direction opposite to the rotation direction is applied, the handle body 41 is tightened by the first contact arc surface H11a and the second contact arc surface H21a. Is released, and the attachment state of the holder H1 and the holder H2 to the attachment member T is also released. As a result, the mounting posture of the handle 4 with respect to the holder device H and the mounting posture of the holder device H with respect to the operating rod 2 can be changed. When the brushing operation is completed and stored in a predetermined storage space, the brush cutter X It is possible to make the entire width of the compact.

  As described above, the holder device H according to the present embodiment shifts the axis from the axis of the other part to the inner peripheral surfaces H11 and H21 of the holders H1 and H2, and gives priority to the handle body over the other part. Since the contact arcuate surfaces H11a and H21a that come into contact with 41 are provided, each of these contact arcuate surfaces H11a and H21a can be brought into surface contact with the outer peripheral surface of the handle body 41 along the circumferential direction thereof. The handle main body 41 can be fixed between the inner peripheral surfaces H11 and H21 of the holders H1 and H2 with certainty even with a weak tightening force. In addition, by providing contact arcuate surfaces H11a and H21a, a step is formed on each of the inner peripheral surfaces H11 and H21. By this step, tolerances generated in the handle body 41 can be absorbed, and a good contact state is maintained. The handle body 41 can be prevented from wobbling.

  In particular, in a state where the first holder H1 and the second holder H2 are assembled, the first contact arc surface H11a provided on the first holder H1 and the second contact arc surface H21a provided on the second holder H2 are mutually connected. Therefore, the contact arcuate surfaces H11a and H21a can be reliably brought into contact with the handle main body 41, and a more firmly fixed state can be realized.

  In addition, an engagement means HK for rotatably engaging one end of each holder H1, H2 is provided, and the other end of each holder H1, H2 is tightened by a single tightening member H3. Attaching work and tightening releasing work can be easily performed, which contributes to a reduction in the number of parts. Further, it is possible to prevent a problem that occurs when a plurality of tightening members H3 are used, that is, a problem that the tightening force of each tightening member H3 becomes unbalanced and a good tightening state cannot be obtained. In particular, as in the brush cutter shown in the present embodiment, the mounting posture (mounting angle) of the handle 4 with respect to the holder device H during use, and the mounting posture of the handle 4 with respect to the operating rod 2 when used or not used are shown. By applying the holder device H of the present invention to a device that is required to be changed each time, it is possible to easily and accurately perform an operation of changing the mounting posture (mounting angle) of the handle.

  Moreover, since each holder H1, H2 is an aluminum die-cast product, the dimensional accuracy is high and the rigidity is excellent.

  The present invention is not limited to the embodiment described in detail above.

  For example, the number of contact arc portions provided on the inner peripheral surface of each holder may be increased or decreased as appropriate. In addition, the formation part of the contact arc surface on the inner peripheral surface of each holder may be matched.

  Moreover, the engaging means should just be what engages the one end parts of each holder so that rotation is possible, and may be things other than the aspect shown to the said embodiment.

  In the above embodiment, the case where the handle body is applied as the fixed object is illustrated, but the fixed object may be any object as long as the outer peripheral surface is circular, for example, the fixed object. An operating rod main body may be adopted as an object, or the auxiliary frame in a so-called wheeled brush cutter in which an auxiliary frame with wheels is set to be detachable from the operating rod may be adopted as a fixed object.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 is an overall schematic diagram of a brush cutter to which a holder device according to an embodiment of the present invention is applied. The whole schematic of the 1st holder and 2nd holder which concern on the embodiment. The figure which shows the 1st holder which concerns on the same embodiment. The figure which shows the 2nd holder which concerns on the same embodiment. Action explanatory drawing.

Explanation of symbols

H ... Holder device H1 ... 1st holder H11 ... 1st inner peripheral surface H11a ... 1st contact circular arc surface H2 ... 2nd holder H21 ... 2nd internal peripheral surface H21a ... 2nd contact circular arc surface H3 ... Fastening member HK ... Engagement means 41 ... Fixed object (handle body)

Claims (4)

A holder device comprising a pair of holders capable of sandwiching a fixed object whose outer peripheral surface is circular in cross section, and a fastening member for fastening the holders together,
The inner peripheral surface of each holder is provided with an abutting arc surface that shifts the center of curvature from the center of curvature of another part and abuts the fixed object in preference to the other part. Holder device. The holder device according to claim 1, wherein a formation portion of the contact arc surface on the inner peripheral surface of one holder is different from a formation portion of the contact arc surface on the inner peripheral surface of the other holder. The holder device according to claim 1, further comprising an engaging unit that rotatably engages one end portions of each holder, wherein the other end portions of each holder are fastened by the single fastening member. 4. The holder device according to claim 1, wherein each of the holders is an aluminum die cast product.

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