JP2005041361A - Mud guard for bicycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To constitute a base 10 and an extension 11 from respective optimal materials, to allow free and independent selection of each material, and to allow the extension 11 to stably join to the base 10 in a blurring preventing state, in a mud guard for a bicycle comprising the base 10 fixed to a body frame and the extension 11 extending in the covering direction of the above part of the wheel from one end or both ends of the base 10. <P>SOLUTION: The base 10 and the extension 11 are separately made of highly rigid material and lightweight soft material, respectively, and are formed to have a cross sectional shape opening downward having upper surfaces 10a and 11a and both side surfaces 10b and 11b, respectively. The upper surfaces 10a and 11a and both side surfaces 10b and 11b are joined to each other in an overlapped state. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mudguard for bicycles, and more particularly to a mudguard to be attached to a bicycle for competition.

  In order to prevent the mud and water droplets on the road from splashing back to the driver and the vehicle body while the bicycle is running, a mudguard is provided so as to cover the front and rear wheels.

  In a general utility vehicle, the mudguard is a thin plate having a substantially arc-shaped cross section that matches the diameter and width of the wheel, and is attached to the main body frame via a mudguard stay and a mounting bracket.

  As shown in FIG. 4, the front mudguard (3) attached to the front wheel is attached in the vicinity of the fork shoulder (31) of the front fork (30) by the front mudguard mounting bracket (33). It is attached to the shaft of the front wheel by a mudguard stay (32). The rear mudguard (4) attached to the rear wheel is attached to the seat stay (41) of the seat post (40) by the rear mudguard mounting bracket (43) and the rear mudguard stay (42). Is attached to the shaft (44) of the rear wheel.

  Moreover, many mudguards to be mounted on a racing bicycle are configured in a bowl shape covering the upper part of the wheel in a substantially horizontal direction, and are attached to the main body frame only with mounting brackets. In particular, in order to prevent mud splashing on the face, the front mud guard provided on the front wheels is important as mud guarding for competition bicycles. In addition, this requires delicate hardness, strength, flexibility, weight, and the like.

  For example, the portion fixed to the main body frame with the mounting bracket (hereinafter referred to as the base portion) needs to have sufficient rigidity, but if the entire mudguard is made of a highly rigid material, the flange portion on the tip side (hereinafter referred to as the base portion) There is a problem that the extension portion is easily broken or broken by an external impact. On the other hand, if the whole is made of a soft material, it can flexibly respond to impacts and will not crack or break, but if the base is too soft, it will hinder fixing to the frame. If the overall strength is increased so as to eliminate all of these problems, the extension portion becomes excessively strong, and the overall weight of the mudguard increases.

  As an invention for solving the above-mentioned problems, a mudguard comprising a base part made of a rigid member having high rigidity and an extension part made of a deformable soft member, which are joined together by integral molding, is disclosed in Patent Literature. 2 is disclosed.

According to the present invention, the base can be securely fixed to the main body frame, and the extension formed by the flexible member is deformable and has resilience, and the extension is external to the extension. Even if an impact is applied, the entire mudguard can be prevented from being damaged by the deformation and restoration of the extension itself, and a desired mudguard function can be expected.
JP-A-8-104275 JP-A-8-216950

  However, in the invention of the above-mentioned Patent Document 2, since the rigid base and the flexible and deformable extension are integrally formed by insert molding, the material constituting each of the base and the extension When selecting, it is necessary to select a combination with good affinity for each other.

  If the base and the extension are configured separately, the optimum material can be selected for each of the base and the extension without being restricted by the material, but depending on the method of joining the extension to the base The extension portion is likely to be shaken by vibration during running, and in the case of a front mudguard, there is a problem that if the shake enters the field of view during running, it cannot concentrate on the competition.

  In addition, the publication discloses that other methods for fixing the base and the extension can be adopted, such as bonding, screwing, and welding, but even with these descriptions, the base and the extension are also disclosed. It is impossible to read a configuration in which the portion is configured as a separate body, and the extension portion can be connected to the base portion in a state in which shaking during traveling is prevented.

  The present invention relates to a bicycle mudguard comprising a base fixed to a main body frame and an extension extending from one end or both ends of the base in a direction covering the upper side of the wheel. The base portion and the extension portion are each made of an optimal material so that it can be fixed with the external portion, and even if an external impact is applied to the extension portion, damage such as cracking or deformation can be prevented. It is an object of the present invention to be able to select each separately and freely, and to make it possible to join the extension part to the base part in a state in which shaking during running is prevented.

(1) The bicycle mudguard according to the first aspect of the present invention is configured such that the base portion is made of a highly rigid material and the extension portion is made of a lightweight soft material, respectively.
The base part and the extension part are formed in a downwardly open cross-sectional shape each having an upper surface and both side surfaces, and the surfaces can be joined to each other in a state where the upper surface and the both side surfaces overlap each other. It is characterized by that.

The technical means operates as follows.
Attach the base to the body frame. Since the base is made of a highly rigid material, it has sufficient strength to be attached to the main body frame. And an extension part is joined to both or one of the front-and-rear end parts of the said base as needed. The base part and the extension part are formed, for example, in a downward open cross-sectional shape such as a substantially U-shaped cross-section or a substantially inverted U-shaped cross-section. Therefore, the base and the extension are joined at at least three locations on the upper surface and both side surfaces. Thereby, although the extension portion is made of a lightweight soft material, the base end portion that is overlapped and joined to the base portion has a strength that reflects the rigidity of the base portion. Reflects softness and can flexibly respond to external impacts.

  (2) In the bicycle mudguard of the invention according to claim 2, the extension portion is detachably connectable to the base portion, and if the customer needs, on the spot, The extension part can be attached to and detached from the base part.

  (3) In the bicycle mudguard of the invention according to claim 3, the extension portion is set to be slidable in the front-rear direction in a state of being overlapped with one end or both ends of the base portion. It can be joined with the length of the extension adjusted to the desired length. The extension is overlapped from the end of the base, and the overlap is set to a predetermined length to join the two. By doing so, the entire length of the mudguard can be adjusted to a desired length.

  (4) In the bicycle mudguard according to the fourth aspect of the present invention, a through-hole penetrating both of the upper surface and the both side surfaces of the base portion and the extension portion is formed, and the through hole is formed. The hole is inserted with a fixture for fixing the overlap margin in a non-displacement state, and the through hole is on one of the base part and the extension part and on the other side on a straight line in the front-rear direction. For example, in the case where a plurality of through holes are formed along the longitudinal direction of the extension portion, one extension hole of the extension portion is most formed in one through hole formed in the base portion. If the through hole near one end near the base is made to correspond, the length of the extended portion protruding from the base can be set to be the longest. Conversely, when the through hole closest to the other end of the extension is overlapped with the through hole of the base, it is possible to provide a mudguard that sets the length of the extension protruding from the base to the shortest. it can.

  (5) In the bicycle mudguard according to the invention according to claim 5, forcible insertion type protrusions are formed on either the upper surface of the base portion and the extension portion or the overlapping margin between the both side surfaces, A through hole into which the projection can be fitted in either one of the overlap margins is formed at a plurality of positions on a straight line in the front-rear direction, and the base portion and the extension portion so that the through hole is located in the protruding direction of the projection. Are partially overlapped, and the protrusions are forcedly inserted into the through holes at a desired position, whereby the two are joined. Further, it is assumed that the insertion of the projection into the through hole is released by forcibly separating the base portion and the extension portion.

Since the present invention has the above configuration, the present invention has the following specific effects.
Since the base is made of a highly rigid material, the mounting strength of the base on the main body frame is large, and can be reliably fixed in a stable state.

  Since the extension portion is made of a lightweight soft material, it can prevent breakage, breakage, etc. of the extension portion with respect to external impact, and it does not become excessive strength or excessive weight as a whole, In the base end portion, the rigidity of the base portion is reflected by joining the base portion having rigidity with the upper surface and both side surfaces being overlapped, and the base end portion of the extension portion has sufficient strength. It will be. As a result, it is possible to suppress shaking of the extension due to vibration, wind pressure, or the like during traveling.

  Since the base portion and the extension portion configured separately are detachably joined, when selecting the material constituting each of the base portion and the extension portion, as in the case of insert molding, mutual affinity There is no need to select a good combination. Therefore, the optimal material can be selected for each of the base portion and the extension portion without being mutually limited.

  Further, according to the invention according to claim 2, since the extension portion is detachably set to the base portion, the athlete attaches and detaches the extension portion on the spot according to the competition conditions such as the weather of the day. be able to. For example, if it is necessary to prevent mud in rainy weather or off-road, it can be used by joining the extension to the base, and if mud protection is not required in sunny weather, remove the extension from the base. It can be used as a bicycle without mudguards.

  According to the invention of claim 3, since the overall length of the mudguard can be adjusted to a desired length, the most suitable length of mudguard is provided according to the preference and competition conditions of the competitor. be able to.

  According to the invention which concerns on Claim 4 and 5, the length adjustment of the extension part with respect to a base part can be performed easily, and mud protection of the most suitable length is provided according to a player's liking or competition conditions, etc. can do.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is an exploded perspective view of the bicycle mudguard according to the first embodiment of the present invention with a part thereof omitted, showing the front mudguard (1) covering the front upper part of the front wheel. Yes.

  The front mudguard (1) is attached to the front fork (30) via a mounting bracket (2), and a base (10) directly attached to the mounting bracket (2), and the base (10) An extension part (11) is formed as a flange part that is formed separately and is attached to the base part (10) and extends in the horizontal direction.

  The base part (10) and the extension part (11) are respectively formed in a substantially U-shaped cross section with a downward opening from the upper surface (10a) (11a) and both side faces (10b) (11b) continuous to both sides thereof. The base portion (10) is formed by injection molding of nylon or nylon mixed with carbon fiber so as to have high rigidity. The extension part (11) is formed of a sheet molded product of polyethylene terephthalate or polycarbonate so as to have flexibility.

  On the upper surface (10a) of the base (10), a pair of through-holes (13) and (14) are formed so as to be parallel to the front and rear, and also in the vicinity of the front end of the upper surface (10a) and both side surfaces (10b). The through holes (15) and (16) are respectively formed. Further, at predetermined positions in the vicinity of the base end portions of the upper surface (11a) and both side surfaces (11b) of the extension portion (11), the through holes (17) ( 18) is formed.

  In order to attach the front mudguard (1) to the front fork (30) of the bicycle frame, first, the mounting bracket (2) is attached to the fork shoulder (31) of the front mudguard (3).

  The mounting bracket (2) is formed by bending a rectangular plate made of steel or stainless steel at a predetermined position, and a substrate (21) to be attached to the lower surface of the fork shoulder (31), and the substrate (21) An upright plate (22a) (22b) that is upright from both front and rear ends, and a support plate (20a) (20b) that is further projected in the front-rear direction from the upper end of the upright plate (22a) (22b). . The distance between the upright plates (22a) and (22b) is configured to be approximately equal to the width in the front-rear direction of the fork shoulder (31), and the height of the upright plates (22a) and (22b). Is set to be approximately equal to the height of the fork shoulder (31). In addition, one through hole (21a) is formed at the center of the substrate (21), and screw holes (23) and (24) are provided in the front and rear of the support plates (20a and 20b), respectively. Two are formed in parallel.

  A fork shoulder (31) of the front fork (30) is formed with a downwardly open cylindrical hole (35) so as to communicate with the lower side of the cylindrical fork stem (34), as shown in FIG. As described above, the fixing member (5) including the pair of first and second cylinders (51) and (52) formed by obliquely cutting the body portion is inserted into the cylinder hole (35).

  A nut portion (50) is provided on the upper surface of the first cylindrical body (51) positioned above, and the outer diameters of the first and second cylindrical bodies (51) and (52) are defined by the cylindrical hole. The size is set so that it can be inserted into (35).

  In order to attach the base (10) to the front fork (30) using the fixing member (5) and the mounting bracket (2), first, the fixing member (5) is attached to the first and second cylindrical bodies (51) ( 52) are mounted on the board (21) of the mounting bracket (2) with the cut surfaces aligned, and from the lower side of the board (21), tightening bolts (25) are inserted into the through holes (21a), the first and first Two cylindrical bodies (51) and (52) are inserted through the cylindrical holes and screwed into the nut (50), and the mounting bracket (2) and the fixing member (5) are integrally coupled by the bolt (25).

  After that, until the support plate (20a) of the mounting bracket (2) protrudes forward, the support portion (20b) protrudes backward, and the substrate (21) hits the lower end of the fork shoulder (31), the fixing member ( 5) is inserted into the cylindrical hole (35) from below the fork shoulder (31). After the insertion, the tightening bolt (25) is tightened. By tightening the tightening bolt (25), the nut portion (50) is moved downward together with the first cylinder (51), and the downward inclined surface of the first cylinder (51) is moved to the second cylinder (52). Press the upward slope. Thereby, the first and second cylinders (51) and (52) are respectively moved in the directions of the arrows in FIG. 2, and firmly pressed into the cylinder hole (35) while pressing the inner surface of the cylinder hole (35). It will be fixed to.

  By using the fixing member (5), the mounting bracket (2) is fixed to the lower surface of the fork shoulder (31) by the tightening bolt (25) so that the mounting bracket (2) does not come off. The base (10) is placed on the support plate (20a) projecting in front of the base plate, and a pair of through holes (13) and (14) provided on the upper surface (10a) are provided on the support plate (20a). Are fixed to the screw holes (23) and (24) with bolts (19).

  After fixing the base (10) to the support plate (20a) of the mounting bracket (2), the base end of the extension (11) is inserted below the front end of the base (10). The through holes (15) and (16) formed in the base (10) correspond to the through holes (17) and (18) formed in the extension portion (11), and the fixing pin (12) is inserted to fix both. . As the fixing pin (12), as shown in FIG. 1, a cylindrical tip crack pin (12a) and a cylindrical tip crack pin (12a) inserted into the cylindrical tip crack pin (12a) A structure composed of an insertion pin (12b) that expands the diameter of the tip of 12a) can be used.

  Since the fixing with the fixing pin (12) is performed at three locations of the upper surface (10a) (11a) and both side surfaces (10b) (11b) of the base (10) and the extension (11), The extension portion (11) is securely attached and is not shaken by wind pressure or vibration. Since the fixing pin (12) is a combination of the cracked pin (12a) and the insertion pin (12b), it can be easily attached and detached without using any tools. Therefore, the extension portion (11) can be easily detached from the base portion (10) by detaching the fixing pin (12). In other words, if you want to prevent muddy water or pebbles from splashing on your face while driving on rainy or off-road roads, you can attach the extension (11) to the base (10). If there is no need for mudguards, the extension (11) can be removed from the base (10) to make it a type of bicycle that does not have mudguards. It can be done easily in the field.

  It is assumed that the extension part (11) occupies more than half of the total length of the front mudguard (1). As a result, the difference between the case where the extension portion (11) is provided and the case where the extension portion (11) is not provided becomes clear, and the mudguard function can be surely exhibited in the former case, and is unnecessary in the latter case. A part of the mudguard (base) does not interfere with driving.

FIG. 3 shows a state in which the front mudguard of the second embodiment of the present invention is mounted.
As in the first embodiment described above, the base (10) is connected to the support plate (20a) of the mounting bracket (2) attached to the fork shoulder (31) of the fork stem (34) by bolts (19 In this embodiment, the auxiliary piece (100) is integrally extended in the horizontal direction from the front end of the base (10), and the auxiliary piece ( 100), the extension piece (11) can be detachably joined.

  Like the base (10), the auxiliary piece (100) is configured to have a substantially U-shaped cross section with a downward opening, and the tip is formed in a conical shape near the front end of the upper surface and both side surfaces. Each of the projections (26) is projected one by one. Further, on the upper surface (11a) and both side surfaces (11b) of the extension portion (11), through holes (27) and (28) into which the protrusions (26) can be forcibly inserted are provided along the axis of the extension portion (11). Each has a plurality of openings.

  In this case, in a state where the extension portion (11) is not attached, the base portion (10) of the shape that the auxiliary piece (100) extends is fixed to the fork stem (34), and the extension portion (11) If this is necessary, the extension (11) may be attached to the auxiliary piece (100). At this time, depending on which of the through holes (27) (28) in which a plurality of protrusions (26) are juxtaposed in the front-rear direction of the extension (11), the entire front mudguard (1) The length is set.

  For example, as shown by the solid line in the figure, the protrusions (26) are respectively inserted into the through holes (27) and (28) located on the most proximal end side (auxiliary piece (100) side) of the extension portion (11). Can provide the front mudguard (1) having the longest overall length, and as shown by the two-dot chain line in FIG. If each (26) is inserted, the front mudguard (1) having the shortest overall length can be provided.

  In this way, the total length of the front mudguard (1) can be changed depending on the positions of the through holes (27) and (28) into which the protrusions (26) are fitted, so that the competition conditions such as the weather on the day or Depending on the athlete's preference, the athlete can adjust the mudguard to the desired length on the spot.

  In addition, in the type of the base portion (10) and the extension portion (11) of the first embodiment, the base portion is also used in the type in which the through holes provided in both are combined and fixed by the fixing pin (12). (10) is provided with an auxiliary piece (100) extending forward, and the auxiliary piece (100) or the extension (11) has a plurality of through-holes through which the fixing pin (12) is inserted in parallel. If provided, the front mudguard (1) is determined by inserting a fixing pin (12) into any of the plurality of through holes arranged in parallel as in the second embodiment. The overall length can be adjusted.

  In the above embodiments, only the front mudguard (1) provided in front of the fork stem (34) among the front mudguards provided above the front wheels has been described in detail. ) Using the support plate (20b), it can also be mounted behind the fork stem (34). Further, the rear mudguard attached to the rear wheel of the bicycle is similarly composed of a base portion and an extension portion, and it goes without saying that the extension portion is detachably attached to the base portion.

The disassembled perspective view which abbreviate | omitted one part of the bicycle mudguard of the 1st embodiment of this invention. The principal part expanded sectional view which shows an example of the method of attaching the mounting bracket (2) of the mudguard for bicycles of the 1st embodiment of this invention to a front fork (30). The principal part expanded sectional view of the mudguard for bicycles of the 2nd embodiment of this invention. The perspective view which shows the conventional mudguard for bicycles.

Explanation of symbols

(10) ... Base
(10a) ... Upper surface
(10b) ・ ・ ・ Both sides
(11) ... Extension
(11a) ... Upper surface
(11b) ・ ・ ・ Both sides

Claims (5)

In the bicycle mudguard comprising a base fixed to the main body frame and an extension extending in the direction covering the upper side of the wheel from one or both ends of the base,
The base is made of a high-rigidity material, and the extension is made of a lightweight soft material.
The base part and the extension part are formed in a downwardly open cross-sectional shape each having an upper surface and both side surfaces, and the surfaces can be joined to each other in a state where the upper surface and the both side surfaces overlap each other. A mudguard for bicycles characterized by   The bicycle mudguard according to claim 1, wherein the extension part is detachably connectable to the base part.   3. The bicycle mudguard according to claim 1, wherein the extension portion is set to be slidable in the front-rear direction in a state of being overlapped with one end or both ends of the base portion, and the extension portion from the base portion. A mudguard for bicycles, characterized in that it can be joined in a state in which the length is adjusted to a desired length.   In the bicycle mudguard according to any one of claims 1 to 3, a through hole penetrating both of the upper surface and the both side surfaces of the base portion and the extension portion is formed, respectively, The through hole is inserted with a fixture for fixing the overlap margin in a non-displacement state, and the through hole has one of the base part and the extension part, and the other has a straight line in the front-rear direction. Bicycle mudguards that are formed along the same.   In the bicycle mudguard according to any one of claims 1 to 3, a forcible insertion-type protrusion is formed on either the upper surface of the base portion and the extension portion or an overlap margin between the both side surfaces, Bicycle mudguards in which through holes into which the projections can be fitted are formed at a plurality of positions on a straight line in the front-rear direction.

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