JP5438160B2 - Chain clip pliers - Google Patents

Description

  The present invention relates to a chain clip pliers.

  In general, the roller chain 31 that constitutes the power transmission structure together with the sprocket is composed of an inner link 32 and an outer link 33 as shown in FIGS. 1 to 3, and the inner link 32 has left and right through holes 32a ′. A pair of inner plates 32a, a pair of bushes 32b laid between opposing through-holes 32a ′ of the pair of inner plates 32a, and a roller 32c rotatably fitted on each bush 32b. On the other hand, the outer link 33 is composed of a pair of outer plates 33a having left and right through holes 33a 'and pins 33b installed between the opposing through holes 33a' of the pair of outer plates 33a. ing. Reference numeral 33b 'denotes a locking groove for fitting and locking a recess 34a' of a chain clip 34 to be described later.

  The inner link 32 and the outer link 33 are connected alternately. Specifically, the pin 33b of the outer plate 33a is inserted into each of the opposite bushes 32b of the inner link 32 arranged on the left and right, and then the tip of the pin 33b protrudes to the outer surface of the other outer plate 33a, In the same way, it is connected to the retaining state, and similarly, the operation of connecting the inner links 32 to each other via the outer link 33 is sequentially performed to form one elongated body, and this one elongated body is made into an annular shape. When connecting the inner links 32 located at the left and right ends, a chain clip 34 is installed between the tips of the pins 33b protruding from the outer surface of the outer plate 33a, and the elongated body is closed to form a ring.

  The chain clip 34 has a C-shape with one end opened, and a recess 34a ′ fitted and locked in the locking groove 33b ′ of the pin 33b is formed on the inner surface on the opening end side and the base end side of the inner hole 34a. The pin 33b is detachable between the tips of the pins 33b by opening and closing the open end side (tip portion) of the pins 33b against the elasticity that is formed and is C-shaped.

  Therefore, when the roller chain 31 is removed from the sprocket (when the winding state is released), the chain clip 34 is removed from the pin 33b.

  Conventionally, the chain clip 34 is generally attached to and detached from the pin 33b by using pliers. When the chain clip 34 is attached to the pin 33b, one clamping portion is attached to the base of the chain clip 34. The other holding part is in contact with the pin 33b inserted into the recess 34a 'on the proximal end side of the chain clip 34, and the holding part is held in this state so that the chain clip 34 is attached to the pin 33b. When the chain clip 34 is removed from the pin 33b, the holding part is brought into contact with the tip of the chain clip 34, and the other holding part is inserted into the recess 34a ′ on the tip side of the chain clip 34. In this state, the chain clip 34 is moved with respect to the pin 33b and removed.

  However, when the chain clip 34 is attached / detached using this pliers, there is a step (L1, L2 in FIG. 2) between the contact position with respect to the chain clip 34 and the contact position with respect to the pin 33b. The chain clip 34 is difficult to move, the peripheral surface of the pin 33b and the base end of the chain clip 34 are arcs, and the lubricating oil is attached. The pliers are slippery, and when the chain clip 34 is removed, the pinching portion that contacts the tip of the chain clip 34 contacts the pin 33b before the pin 33b completely disengages from the recess 34a ′. There is a problem that the chain clip 34 is difficult to remove.

  Therefore, the present applicant has proposed a dedicated chain clip pliers for attaching and detaching the chain clip 34 according to Design Registration No. 1426708.

  The chain clip pliers are formed by cross-connecting a pair of halves having a clamping part on the distal end side and a gripping part on the proximal end side, and the inner surface (nipping surface) of one clamping part is the other clamping part The inner surface of the wide clamping part is formed with U-shaped recesses that open to the left and right side surfaces, and the inner surface of the narrow clamping part. Is formed with a V-shaped groove that opens to the left and right side surfaces. Note that a U-shaped groove that opens to the front end surface is also formed on the inner surface of one of the holding portions, and a V-shaped groove that opens to the front end surface is also formed on the inner surface of the other holding portion.

  Actually, when this chain clip pliers is used to attach the chain clip 34 to the pin 33b of the roller chain 31, the inner surface of the wide clamping part abuts the proximal end of the chain clip 34, and the inner surface of the narrow clamping part Of the pin 33b to be inserted into the U-shaped recess on the proximal end side of the chain clip 34, and the chain clip 34 against the pin 33b by holding the gripping portion in this state. Is moved, the front and rear recesses 34a ′ of the chain clip 34 are fitted and locked in the locking grooves 33b ′ of the pair of pins 33b, and the mounting is completed.

  At this time, the left and right opening edges of the U-shaped concave portion provided on the inner surface of the wide holding portion are in contact with the base end of the chain clip 34 at two points, and the V-shape provided on the inner surface of the narrow holding portion. The pin 33b fits into the recess and contacts at two points. Therefore, even if the peripheral surface of the pin 33b and the base end of the chain clip 34 are arcs and oil adheres, the chain clip 34 is improved. Can be moved.

  Next, when removing the chain clip 34 from the pin 33b, the inner surface of the wide clamping portion is brought into contact with the tip of the tip of the chain clip 34, and the inner surface of the narrow clamping portion is recessed on the distal end side of the chain clip 34a ′. When the chain clip 34 is moved with respect to the pin 33b by holding the pinching portion in this state by abutting the surface of the pin 33b to be inserted into the pin 33b and holding the pinching portion in this state, the locking groove of each of the pair of pins 33b The recesses 34a 'on the front and rear sides of the chain clip 34 are engaged and disengaged from 33b' to complete the removal.

  At this time, the pin 33b is fitted into the V-shaped concave portion provided on the inner surface of the narrow clamping portion, and the chain clip 34 is moved by contacting the pin 33b at the tip side of the chain clip 34. The pin 33b removed from the recess 34a 'is also fitted into the U-shaped recess provided on the inner surface of the wide clamping part.

  In any case where the chain clip 34 is removed, the inner surface of the pinching portion is formed with a concave streak so that the peripheral surface of the pin 33b and the base end of the chain clip 34 are circular and oil adheres. The chain clip 34 can be moved well without slipping.

  In any case where the above-described chain clip 34 is detached, the inner surface of the clamping part is set wider than the inner surface of the clamping part. Therefore, the contact position with respect to the chain clip 34 and the contact with the pin 33b is set. The chain clip 34 can be moved favorably in accordance with the level difference from the contact position.

  Therefore, the chain clip pliers can perform the attaching / detaching operation of the chain clip 34 with respect to the pin 33b very simply and quickly as compared with the case where the above-described pliers are used.

Design Registration No. 1426708

  The present inventor further researched and developed the above-described chain clip pliers, and as a result, developed an innovative chain clip pliers with extremely high commercial value.

  The gist of the present invention will be described with reference to the accompanying drawings.

  A chain clip plier for detaching a chain clip 34 for joining end portions of a roller chain 31 formed by connecting an inner link 32 and an outer link 33, with a clamping portion 3, 4 on the distal end side and a proximal end side A pair of halves 1 and 2 having gripping portions 5 and 6 are cross-pivoted, and the inner surface 3A of one of the clamping portions 3 is wider than the inner surface 4A of the other clamping portion 4. The wide inner surface 3A of the sandwiching portion 3 is provided with concave strips 3a that open to the left and right side surfaces, and the inner surface 4A of the narrow sandwiching portion 4 is also open to the left and right side surfaces. The chain clip pliers are characterized in that there are provided concave recesses 4a, and interference prevention recesses 7 for preventing interference with adjacent pins 33b are provided on both side surfaces of the wide clamping part 3. It is related to.

  2. The chain clip pliers according to claim 1, wherein the interference preventing recess 7 has a structure in which only the edge 3c on the holding surface side is left and meat on both sides of the holding portion 3 is removed. It relates to clip pliers.

  The chain clip pliers according to any one of claims 1 and 2, wherein the concave portion 3a of the inner surface 3A of the wide holding portion 3 is U-shaped in a side view, and the narrow holding portion 4 is narrow. The recess 4a of the inner surface 4A is a chain clip pliers characterized by having a V shape in a side view.

  The chain clip pliers according to any one of claims 1 to 3, wherein a distal end of the wide sandwiching portion 3 is configured to protrude from a distal end of the narrow sandwiching portion 4; On the inner surface 3A of the sandwiching portion 3, there are provided two recess portions 3b that open to the front end surface, divided into the recess portions 3a that open to the left and right side surfaces, and the inner surface of the narrow sandwiching portion 4 Also in 4A, there is provided a chain clip pliers characterized in that two concave strips 4b opened on the front end surface are divided into two concave strips 4a opened on the left and right side surfaces.

  Further, in the chain clip pliers according to claim 4, both of the two ridges 3b divided by the wide holding part 3 are U-shaped in a front end view, and the narrow holding part 4 Both of the two recessed grooves 4b that are divided are V-shaped when viewed from the front end surface.

  Since the present invention is configured as described above, an epoch-making chain clip plier having a very high commercial value can be achieved, for example, the work of detaching the chain clip from the pin in the roller chain can be performed very simply and quickly.

It is a perspective view which shows a chain clip pliers. It is sectional drawing explaining the principal part of a chain clip pliers. It is sectional drawing explaining the principal part of a chain clip pliers. It is a perspective view which shows a present Example. It is a perspective view which shows the principal part of a present Example. It is a side view which shows the principal part of a present Example. It is operation | movement explanatory drawing of the principal part of a present Example. It is use condition explanatory drawing of a present Example. It is use condition explanatory drawing of a present Example.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  For example, when the chain clip 34 is attached to the pin 33b of the roller chain 31, the inner surface 3A of the wide holding portion 3 is brought into contact with the proximal end of the chain clip 34, and the inner surface 4A of the narrow holding portion 4 is connected to the chain clip 34. The pin 33b inserted into the recess 34a 'on the base end side of the pin 33b comes into contact with the surface of the opening side of the chain clip 34, and in this state, the gripping portions 5 and 6 are clamped to hold the chain clip 34 against the pin 33b. Move and install. At this time, the opening edge 3a ′ of the recess 3a provided on the inner surface 3A of the wide clamping part 3 contacts the base end of the chain clip 34, and thus the peripheral surface of the pin 33b and the base end of the chain clip 34 Even if oil is attached in an arc, it is difficult to slip and the chain clip 34 can be moved well.

  On the other hand, when removing the chain clip 34 from the pin 33b, the inner surface 3A of the wide clamping portion 3 is brought into contact with the opening end of the chain clip 34, and the inner surface 4A of the narrow clamping portion 4 is recessed on the tip side of the chain clip 34. The pin 33b to be inserted into 34a 'comes into contact with the tip end surface of the chain clip 34, and in this state, the clamping portions 5 and 6 are clamped to move the chain clip 34 relative to the pin 33b and remove it. At this time, the pin 33b removed from the recess 34a ′ on the tip side of the chain clip 34 is fitted in the recess 3a provided on the inner surface 3A of the wide clamping part 3.

  In any case where the above-described chain clip 34 is detached, the concave portions 3a and 4a are formed on the inner surfaces of the holding portions 3 and 4, so that the peripheral surface of the pin 33b and the base end of the chain clip 34 are Even if oil adheres to the arc, it is difficult to slip and the chain clip 34 can be moved well.

  Further, according to the present invention, the inner surface 3A of the clamping part 3 is set wider than the inner surface 4A of the clamping part 4, so that there is a step between the contact position with respect to the chain clip 34 and the contact position with respect to the pin 33b. Correspondingly, the chain clip 34 can be moved well.

  By the way, various sizes of roller chains 31 are proposed. However, when the structure is small and the distance between the pins 33b is narrow, the side of the wide clamping part 3 interferes with the adjacent pin 33b so that the chain can be improved. There is a concern that the clip 34 cannot be removed.

  In this regard, in the present invention, the interference prevention recesses 7 for preventing the interference with the adjacent pins 33b are provided on both side surfaces of the wide clamping part 3, and the small roller chain 31 is provided by the interference prevention recesses 7. Even so, the side surface of the sandwiching portion 3 does not interfere with the adjacent pin 33b, and therefore, the operation of detaching the chain clip 34 from the pin 33b can be performed very simply and quickly.

  A specific embodiment of the present invention will be described with reference to the drawings.

  In this embodiment, a pair of halves 1 and 2 are pivotally attached to each other, and a pair of clamping parts 3 that are opened and closed by opening and closing operations of a pair of gripping parts 5 and 6 provided on one end side of the pivoting part. 4 is provided on the other end side of the pivot attachment portion.

  Specifically, as shown in FIG. 4, a suitable pair of metal halves 1 and 2 are provided, and the portions near the tips of the halves 1 and 2 are superposed in a crossed state via the shaft member 10. A pair of gripping portions 5 and 6 are provided so as to be pivotally attached and the grip 11 is covered at a portion closer to the proximal end than the pivotally attached portion. On the other hand, inner surfaces 3A and 4A A pair of clamping parts 3 and 4 provided with a surface) are provided.

  The inner surfaces 3A and 4A of the sandwiching portions 3 and 4 are formed in such a shape that, when the sandwiching portions 3 and 4 are closed, only the distal end side portions are in contact with each other, and the proximal end portion is not in contact.

  Therefore, when the chain clip 34 is attached or detached, the inner surface 3A to be brought into contact with the end portion of the chain clip 34 comes into contact with the chain clip 34 with the tip side first and strongly.

  Of the sandwiching portions 3 and 4, the sandwiching portion 3 (inner surface 3A) is set wider in the left-right direction than the sandwiching portion 4 (inner surface 4A), and when the inner surfaces 3A and 4A are brought into contact with each other. The left and right end portions of the inner surface 3A are configured to be exposed from the left and right end portions of the inner surface 4A. Further, the front end surface of the sandwiching portion 4 is provided on the inclined surface, and the sandwiching portion 3 (inner surface 3A) is the sandwiching portion 4 (inner surface). 4A) is set to be vertically long, and when the inner surfaces 3A and 4A are brought into contact with each other, the front end portion of the inner surface 3A protrudes from the front end portion of the inner surface 4A.

  This is to cope with a step between the contact position with respect to the chain clip 34 and the contact position with respect to the pin 33b, and the chain clip 34 can be moved favorably from this configuration.

  Further, the inner surface 3A of the sandwiching portion 3 is provided with a U-shaped cross-section concave portion 3a (horizontal U-shaped concave portion) that opens on the left and right side surfaces, and a U-shaped cross-section that opens on both front and rear end surfaces. A concave portion 3b (vertical U-shaped concave portion) is provided. This concave strip portion 3b is divided into concave strip portions 3a.

  Further, on the left and right side surfaces 3 </ b> C and 3 </ b> D of the sandwiching portion 3, an interference preventing recess 7 that opens to the outer surface 3 </ b> B of the sandwiching portion 3 is provided.

  As shown in FIGS. 4 to 7, the interference prevention recess 7 rotates the meat on the left and right side surfaces 3 </ b> C and 3 </ b> D of the sandwiching portion 3 while leaving only the front, rear, left and right edges 3 c on the sandwiching surface side. The distance L3 between the bottom surfaces 7a of the left and right interference prevention recesses 7 is set to be equal to or less than the distance between the left and right side surfaces 4C and 4D of the clamping part 4 (see FIG. 8). .

  Therefore, even with a small roller chain 31, the interference preventing recess 7 interferes with the side pin 3b (the pin 33b adjacent to the pin 33b on which the chain clip 34 is mounted) on the side surfaces 3C and 3D of the clamping unit 3. Therefore, the attaching / detaching operation of the chain clip 34 with respect to the pin 33b can be performed very simply and quickly.

  That is, in consideration of the case where the chain clip 34 is detached using the horizontal U-shaped concave portion 3a and the horizontal V-shaped concave portion 4a, interference is performed to prevent the interference of the pins 33b on the left and right side surfaces 3C and 3D of the clamping portion 3. A prevention recess 7 is provided.

  In this regard, in consideration of the case where the chain clip 34 is detached using the vertical U-shaped concave portion 3b and the vertical V-shaped concave portion 4b described later, the outer surface 3B of the holding portion 3 and the outer surface 4B of the holding portion 4 described later are provided. In order to prevent the interference of the pin 33b, the outer surface 3B of the clamping part 3 and the outer surface 4B of the clamping part 4 are formed in an inclined surface so as to be tapered. The inclined surface of the outer surface 4B of the sandwiching portion 4 is formed on the outer surface 4B of the sandwiching portion 4 when the chain clip 34 is attached / detached using the lateral U-shaped concave portion 3a and the lateral V-shaped concave portion 4a described later. This contributes to preventing the interference of the pin 33b.

  Further, the inner surface 4A of the sandwiching portion 4 is provided with a concave V-shaped section 4a (lateral V-shaped concave section) that opens on the left and right side surfaces, and has a V-shaped cross section that opens at both front and rear end faces. A concave portion 4b (vertical V-shaped concave portion) is provided. This concave strip portion 4b is divided into concave strip portions 4a.

  In the present embodiment, whether the horizontal U-shaped concave portion 3a and the horizontal V-shaped concave portion 4a are used or the vertical U-shaped concave portion 3b and the vertical V-shaped concave portion 4b are used depending on the size of the place of use. Decide.

  Reference numeral 12 denotes an opening urging body that urges the holding portions 3 and 4 in the opening direction when the gripping portions 5 and 6 are operated.

  The attachment / detachment of the chain clip 34 using the chain clip pliers according to the present embodiment configured as described above will be described.

  First, when the chain clip 34 is attached to the pin 33b of the roller chain 31, the inner surface 3A of the wide holding portion 3 is brought into contact with the base end of the chain clip 34, and the inner surface 4A of the narrow holding portion 4 is connected to the chain clip 34. The pin 33b to be inserted into the recess 34a 'on the base end side of the pin 33b comes into contact with the opening-side surface of the chain clip 34, and the chain clip 34 is moved relative to the pin 33b by clamping the gripping portions 5 and 6 in this state As a result, the front and rear recesses 34a ′ of the chain clip 34 are fitted and locked in the locking grooves 33b ′ of the pair of pins 33b, respectively, so that the mounting is completed (see FIG. 8).

  At this time, the left and right opening edges 3a ′ of the horizontal U-shaped concave portion 3a provided on the inner surface 3A of the wide holding portion 3 are in contact with the base end of the chain clip 34 at two points, The pin 33b fits into the horizontal V-shaped concave portion 4a provided on the inner surface 4A and comes into contact at two points. And the chain clip 34 can be moved well.

  Next, when removing the chain clip 34 from the pin 33b, the inner surface 3A of the wide clamping portion 3 is brought into contact with the tip of the tip of the chain clip 34, and the inner surface 4A of the narrow clamping portion 4 is moved to the tip side of the chain clip 34. When the chain clip 34 is moved with respect to the pin 33b by abutting the tip 33b of the pin 33b to be inserted into the concave portion 34a 'of the pin 33b and holding the holding portions 5 and 6 in this state, The recesses 34a ′ at the front and rear of the chain clip 34 are engaged with and disengaged from the locking grooves 33b ′ of the pins 33b, respectively, thereby completing the removal (see FIG. 9).

  At this time, the pin 33b is inserted into the lateral V-shaped concave portion 4a provided on the inner surface 4A of the narrow sandwiching portion 4, and the chain clip 34 is moved by contacting the pin 33b at two points. The pin 33b removed from the concave portion 34a 'on the distal end side is also fitted into the lateral U-shaped concave portion 3a provided on the inner surface 3A of the wide holding portion 3.

  In any case where the above-described chain clip 34 is detached, the inner surface 3A of the clamping part 3 is set wider than the inner surface 4A of the clamping part 4, so that the position of contact with the chain clip 34 can be reduced. The chain clip 34 can be moved favorably in accordance with the level difference from the contact position with respect to the pin 33b.

  Further, in this embodiment, an interference preventing recess 7 is provided on the side surface of the wide clamping portion 3 so as to prevent the interference with the pin 33b adjacent to the outer surface 3B of the clamping portion 3. The prevention recess 7 prevents the side surface of the clamping part 3 from interfering with the adjacent pin 33b even in a small roller chain 31, so that the chain clip 34 can be attached to and detached from the pin 33b very easily and quickly. become.

  Since the present embodiment is configured as described above, the operation of detaching the chain clip 34 from the pin 33b in the roller chain 31 can be performed very simply and quickly.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

DESCRIPTION OF SYMBOLS 1 Half body 2 Half body 3 Clamping part 3A Inner surface 3a Groove part 3b Groove part 4 Clamping part 4A Inner surface 4a Groove part 4b Groove part 5 Gripping part 6 Gripping part 7 Interference prevention recessed part
31 Roller chain
32 internal links
33 Outside links
33b pin
34 Chain clip

Claims (5)

  A chain clip pliers for detaching a chain clip for end joining in a roller chain formed by connecting an inner link and an outer link, a pair of gripping portions on the distal end side and a gripping portion on the proximal end side The halves are configured to be pivotally attached to each other, and the inner surface of one of the clamping parts is set wider than the inner surface of the other clamping part. Concave ridges that open on the side surfaces are provided, and concave ridges that open on the left and right side surfaces are provided on the inner surface of the narrow sandwiching part, and adjacent to both side surfaces of the wide sandwiching part. A chain clip pliers provided with an interference prevention recess for preventing interference with a pin to be operated.   2. The chain clip pliers according to claim 1, wherein the interference preventing recess has a structure in which only the edge on the holding surface side is left and the meat on both side surfaces of the holding portion is removed.   The chain clip pliers according to any one of claims 1 and 2, wherein the concave portion on the inner surface of the wide holding portion is U-shaped in a side view, and the concave portion on the inner surface of the narrow holding portion. The chain clip pliers are characterized in that the portion is V-shaped in side view.   The chain clip pliers according to any one of claims 1 to 3, wherein a distal end of the wide clamping portion is configured to protrude from a distal end of the narrow clamping portion, and further, The inner surface is provided with two recesses that open to the front end surface, divided into the recesses that open to the left and right side surfaces, and the inner surface of the narrow clamping portion also has a recess that opens to the front end surface. The chain clip pliers are characterized in that two strips are provided by being divided into concave strips that open to the left and right side surfaces.   5. The chain clip pliers according to claim 4, wherein the two recessed strip portions of the wide clamping portion are both U-shaped when viewed from the front end surface, and the two of the narrow clamping portions are divided. Both of the concave portions are V-shaped when viewed from the front end surface.

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