JP2019111957A - Seat pillar adjustment restriction mechanism and bicycle including the same - Google Patents

Abstract

To provide a seat pillar adjustment restriction mechanism that prevents a seat pillar from being fixed with a limit line exceeded, and a bicycle including the mechanism.SOLUTION: A seat pillar adjustment restriction mechanism includes a seat pillar 1 and a frame 20 including a seat tube 2 into which the seat pillar 1 is inserted. A lower end of the seat pillar 1 is provided with a receiving member 3, an elastic member 4, and a pressing member 5, which presses the elastic member 4 against the receiving member 3, in that order. The top of the seat tube 2 includes latching means that latches the elastic member 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seatpost adjustment limiting mechanism and a bicycle provided with the same, and more particularly, to a seatpost adjustment limiting mechanism that prevents fixing of a seatpost beyond a limit line and a bicycle provided with the same.

  In recent years, the demand for share bikes (share cycles) has been increasing, but there are cases where users of share bikes get in with the seatpost fixed by riding over the limit line indicating the minimum fitting length of the seatpost. Seen. That is, the seat post is fixed to the seat tube just at the end of the seat post, and when using the share bike in such a state, the seat tube is inclined rearward in the traveling direction of the bicycle, so There is a possibility that the post may be missed, leading to an accident such as a fall. Under such circumstances, various proposals have been made to prevent the seat post from coming off.

  For example, in Patent Document 1, a cylindrical body is provided at the inner lower end portion of the seat post, and a symmetrical pin is provided so as to be able to project on the cylindrical body, and the pressing screw in the center of the cylindrical body is rotated. A structure is proposed in which the pin is protruded to prevent the seat post from coming off. Patent Document 2 proposes a plug used for retaining a seat post having a predetermined shape. This plug has an umbrella-shaped holding member capable of being force fitted in a seat post whose inner diameter at the lower end opening is reduced, a pedestal portion to which a first support for supporting the center of the holding member is fixed, and the pedestal A fixed base mounted in parallel with the pedestal via a second column of fixed length vertically attached to the lower surface of the housing, and one end of the fixed base located between the stationary base and the pedestal And a spring member for pressing the free end side of the stopper member to the fixed base side attached to the lower surface of the pedestal portion. This makes it possible to prevent theft of the saddle by simply restricting the withdrawal of the seat post.

Japanese Patent Application Laid-Open No. 7-117771 JP, 2011-178239, A

  However, in the seat post retaining structure proposed in Patent Document 1, a cylindrical body is installed in the seat post, and a pin is protruded from the cylindrical body and used as a stopper. Therefore, the contact area between the sheet tube and the pin which is the stopper is small, and as a result, a high load is applied to the sheet tube and the pin, and there is a concern that the pin may be damaged or the inside of the sheet tube may be damaged. In addition, since the seatpost retaining method proposed in Patent Document 2 presses a pre-formed plug into the seatpost, once assembled, the seatpost can not be removed during maintenance or the like. It will Moreover, the structure is also complicated, and there is a problem that the risk of failure etc. is high.

  Therefore, an object of the present invention is to provide a seatpost adjustment limiting mechanism that can prevent the seatpost from being fixed beyond the limit while avoiding such a problem, and a bicycle provided with the same.

  As a result of intensive studies to solve the above problems, the present inventor has found that the problems can be solved by using the following configuration, and the present invention has been completed.

That is, according to the seatpost adjustment limiting mechanism of the present invention, there is provided a seatpost adjustment limiting mechanism having a seatpost and a frame provided with a seat tube into which the seatpost is inserted.
The lower end portion of the seat post is sequentially provided with a receiving member, an elastic member, and a pressing member for pressing the elastic member against the receiving member, and
The upper portion of the sheet tube is characterized by having a hooking means for hooking the elastic member.

  In the seat post adjustment limiting mechanism according to the present invention, preferably, the hooking means has a tapered shape provided at the upper portion of the seat tube and having a diameter reduced. Moreover, it is preferable that the said elastic member is cylindrical shape. Furthermore, in the seat post adjustment limiting mechanism of the present invention, it is preferable that the receiving member and the pressing member are fastened by screwing.

  The bicycle of the present invention is characterized by comprising the seat post adjustment limiting mechanism of the present invention.

  According to the present invention, it is possible to provide a seatpost adjustment limiting mechanism and a bicycle provided with the same, which has a simple structure and prevents the seatpost from being fixed beyond the limit line. The adjustment limiting mechanism of the seat post according to the present invention can be suitably applied not only to new cars but also to existing bicycles, since there is no need for processing other than the seat post. In addition, since the adjustment limiting mechanism of the seat post of the present invention compresses and widens the elastic member provided at the lower portion of the seat post, the load does not concentrate locally, and the seat is a pin as in the prior art. Compared to the structure in which the movement of the post is restricted, the frame is less likely to be damaged and the durability is also excellent. Furthermore, since the seat post adjustment limiting mechanism of the present invention is a structure that only compresses the elastic member, it has an advantage that the number of parts is small and the risk of failure is also small. Furthermore, the seatpost adjustment limiting mechanism according to the present invention is characterized by the structure of the seatpost inside the seat tube, so that it does not deteriorate the appearance and is also effective in preventing tampering.

It is a schematic side view of a bicycle frame and a seatpost for explaining a seat post adjustment limiting mechanism according to a preferred embodiment of the present invention. It is an exploded perspective view of a seat post provided with a seat post adjustment limiting mechanism concerning one preferred embodiment of the present invention. It is a perspective view of the seat post lower part provided with the seat post adjustment limiting mechanism concerning one preferred embodiment of the present invention. It is sectional drawing of the sheet | seat tube upper side provided with the seat post adjustment limiting mechanism which concerns on one preferable embodiment of this invention. It is sectional drawing of the sheet | seat tube upper side provided with the seat post adjustment restriction | limiting mechanism which concerns on the other preferable embodiment of this invention. It is explanatory drawing at the time of assembling | attaching the seat post which concerns on one preferable embodiment of this invention to a flame | frame. It is a perspective view of a pressing member of a seat post adjustment limiting mechanism concerning one preferred embodiment of the present invention.

Hereinafter, the seat post adjustment limiting mechanism of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic side view of a bicycle frame and a seat post for explaining a seat post adjustment limiting mechanism according to a preferred embodiment of the present invention, and FIG. 2 is a preferred embodiment of the present invention. 3 is an exploded perspective view of the seat post provided with the seat post adjustment limiting mechanism according to the present invention, and FIG. 3 is a perspective view of the lower part of the seat post provided with the seat post adjustment limiting mechanism according to one preferred embodiment of the present invention. FIG. 4 is a cross-sectional view of an upper side of a seat tube provided with a seat post adjustment limiting mechanism according to one preferred embodiment of the present invention. As shown, the seatpost adjustment limiting mechanism of the present invention includes a seatpost 1 and a frame 20 provided with a seat tube 2 into which the seatpost 1 is inserted.

  In the seat post adjustment limiting mechanism of the present invention, the receiving member 3, the elastic member 4, and the pressing member 5 for pressing the elastic member 4 against the receiving member 3 are sequentially provided at the lower end of the seat post 1, as shown. Have. Here, the receiving member 3 may be fixed to the lower end portion of the seat post 1 by adhesion, welding or the like, and a screw thread is provided on the inner periphery of the lower end portion of the seat post 1. And the corresponding screw groove may be provided and fixed by screwing them. Further, the seat post 1 and the receiving member 3 may be integrally formed.

  With such a configuration, when the elastic member 4 is pressed by the pressing member 5 after inserting the seat post 1 into the sheet tube 2, the elastic member 4 is compressed as shown in FIG. Will be broadened. When the elastic member 4 is thicker than the inner diameter of the seat post 1, the elastic member 4 and the inside of the seat tube 2 interfere with each other, and the movement of the seat post 1 can be restricted. Therefore, in the seat post adjustment limiting mechanism of the present invention, the seat tube 2 is provided with a hooking means for hooking the wide elastic member 4. In the illustrated example, a tapered portion 2a with a reduced diameter is provided on the top of the sheet tube 2 as a hooking means (see FIG. 4), and the diameter of the widened elastic member 4 is equal to or larger than the inner diameter of the tapered portion 2a. And by compressing the elastic member 4 with the pressing member 5 so as to be smaller than the inner diameter of the main body 2b of the sheet tube 2, it is possible to adjust the height of the seat post 1 within a normal range, The movement of the seat post 1 to a position beyond the line can be restricted.

  In the illustrated example, an example in which the tapered portion 2a is provided on the upper portion of the sheet tube 2 as the hooking means has been described, but in the seat post adjustment limiting mechanism of the present invention, the hooking means is the tapered portion It is not limited to 2a. For example, FIG. 5 is a cross-sectional view of the upper portion of the seat tube provided with the seat post adjustment limiting mechanism according to another preferred embodiment of the present invention, and as shown in FIG. The movement of the elastic member 4 wider than the inner diameter w of the sleeve may be restricted by inserting and fixing the sleeve 2c of the length L corresponding to the line.

  In the seat post adjustment limiting mechanism of the present invention, the shapes and materials of the receiving member 3, the elastic member 4 and the pressing member 5 are such that they are attached to the lower end portion of the seat post 1. There is no particular limitation as long as it can be inserted into the sheet tube 2 before the elastic member 4 is compressed. That is, of the seat post 1, the receiving member 3, the elastic member 4 and the pressing member 5, the diameter of the seat post 1 may be the largest diameter.

  In a preferred embodiment shown, the receiving member 3 is cylindrical and is provided with a through hole 3a having a screw groove at its center. The pressing member 5 also has a cylindrical shape, and a distal end portion 5 a of the pressing member 5 is provided with a thread corresponding to a screw groove provided in the through hole 3 a of the receiving member 3. Furthermore, the elastic member 4 also has a cylindrical shape, and a through hole 4 a through which the tip 5 a of the pressing member 5 can penetrate is provided at the center of the elastic member 4. Then, by screwing the receiving member 3 and the pressing member 5 via the elastic member 4, the pressing member 5 presses the elastic member 4.

  In the seat post adjustment limiting mechanism of the present invention, if the pressing member can compress the elastic member, it is not necessarily limited to such a structure, but the degree of compression of the elastic member 4 is adjusted. It is preferable that the elastic member 4 be pressed by screwing the receiving member 3 and the pressing member 5 because the elastic member 4 is easily pressed. Further, as shown in FIGS. 1 to 3, the elastic member 4 preferably has a cylindrical shape. When the elastic member 4 has a cylindrical shape, when compressed by the pressing member 5, the elastic member 4 is uniformly widened. As a result, since the load applied to the elastic member 4 is equalized, the durability is excellent.

  In the seat post adjustment limiting mechanism of the present invention, the material is not particularly limited as long as the elastic member 4 is compressed by pressing with the pressing member 5 and becomes larger than the outer diameter of the seat post 1. For example, rubber, resin, etc. can be used. In the case where the movement of the seat post 1 is restricted using, for example, rubber as the elastic member 4 as compared with the case where the movement of the seat post is restricted by the pin as in the prior art, the rubber is more sheet tube 2 than the pin. Since the contact surface with this increases, damage to the sheet tube can be suppressed. Even if rubber is used as the elastic member 4, since the elastic member 4 is disposed in the sheet tube 2, deterioration of the rubber due to external factors such as light hardly occurs.

  FIG. 6 is an explanatory view when the seat post according to one preferred embodiment of the present invention is assembled to the frame, and FIG. 7 is a pressing of the seat post adjustment limiting mechanism according to one preferred embodiment of the present invention. It is a perspective view of a member. In the seat post 1 according to the seat post adjustment limiting mechanism of the present invention, the receiving member 3, the elastic member 4 and the pressing member 5 are temporarily tightened to the lower end thereof to such an extent that the elastic member 4 is not deformed. The seat post 1 is inserted into the seat tube 2, and thereafter, as shown in FIG. 6, the fastening hole 5 b provided at the center of the pressing member 5 from the opening 1 a at the upper end of the seat post 1 (see FIG. 7) The press member 5 can be attached to the sheet tube 2 by tightening the pressing member 5 using a tool 6 having a fitting shape corresponding to. When the pressing member 5 is tightened, the tool 6 is removed and the saddle is attached to the upper end of the seat post 1 so that it can be used as a bicycle. Further, by loosening the pressing member 5 using the tool 6, the elastic member 4 returns to the state before compression, so that the seat post 1 can be removed from the sheet tube 2.

  The seatpost adjustment limiting mechanism according to the present invention includes a seatpost 1 and a frame 20 provided with a seat tube 2 into which the seatpost 1 is inserted. The lower end of the seatpost 1 receives a receiving member 3 and an elastic member. 4 and a pressing member 5 for pressing the elastic member 4 against the receiving member 3 sequentially, and only having a hooking means for hooking the elastic member 4 on the upper part of the sheet tube 1 It is important, and there are no particular restrictions on the other configurations. For example, the material and the like of the receiving member 3 and the pressing member 5 can be appropriately selected in consideration of the strength and the like. The adjustment limiting mechanism of the seat post according to the present invention can be applied not only to new cars but also to existing bicycles, since it is only necessary to modify the lower end portion of the seat post 1 without processing the frame 20. .

  Next, the bicycle of the present invention will be described. The bicycle of the present invention is provided with the seat post adjustment limiting mechanism of the present invention, and the configuration other than this is not particularly limited. For example, one preferred embodiment of the bicycle according to the present invention includes a bicycle having a frame shown in FIG. 1, and in the illustrated example, a seat tube 2 with a seat post 1 and a head tube 7 The lower portion of the seat tube 2 and the down tube 8 extending from the lower portion of the head tube 7 are connected via the bottom bracket shell 9 to support the handle. Further, the seat stay 10 and the chain stay 11 may be connected to each other via the rear end 12 that extends toward the mounting position of the bicycle rear wheel and fixes the rear wheel axle. Furthermore, a front fork may be provided which extends forward and obliquely downward from the head tube 7, and the front wheel may be rotatably attached to the lower end of the front fork. The bicycle of the present invention is not particularly limited in its application, but can be suitably adopted for a share bike in which the height adjustment of the saddle is frequently performed.

Reference Signs List 1 seat post 1a opening 2 seat tube 2a taper 2b main body 2c sleeve 3 receiving member 3a through hole 4 elastic member 4a through hole 5 pressing member 5a tip 5b tightening hole 6 tool 7 head tube 8 down tube 9 bottom bracket shell 10 seat stay 11 chain stay 12 rear end 20 frame

Claims (5)

In a seatpost adjustment limiting mechanism having a seatpost and a frame provided with a seat tube into which the seatpost is inserted,
The lower end portion of the seat post is sequentially provided with a receiving member, an elastic member, and a pressing member for pressing the elastic member against the receiving member, and
A seat post adjustment limiting mechanism according to claim 1, wherein an upper portion of said seat tube has a hooking means for hooking said elastic member.   The seat post adjustment limiting mechanism according to claim 1, wherein the hooking means is a tapered shape with a diameter reduction provided at an upper portion of the sheet tube.   The seat post adjustment limiting mechanism according to claim 1, wherein the elastic member has a cylindrical shape.   The seat post adjustment limiting mechanism according to any one of claims 1 to 3, wherein the receiving member and the pressing member are screwed together. A bicycle comprising the seat post adjustment limiting mechanism according to any one of claims 1 to 4.

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