JP5216933B1 - Roller chain connection jig - Google Patents

Abstract

An object of the present invention is to clamp a roller so that an inner link to be connected does not stand on the roller chain connecting jig side when the roller chain is connected.
A taper 9 (forward taper 9a) that approaches the opposing claw part 2 and a taper that separates from the opposing claw part 2 on the back surface part 8 that is the outer side of the claw part 2 in the clamping direction. 9 (reverse taper 9b) are sequentially formed to form the notch 10. When this claw portion 2 is inserted between the two rollers R1 and R2 of the inner link L1 and one roller R1 is sandwiched between the claw portions 2, a gap is formed between the notch portion 10 and the other roller R2. Therefore, it is possible to prevent the inner link L1 from standing due to the contact between the back surface portion 8 and the other roller R2.
[Selection] Figure 1

Description

  The present invention relates to a roller chain connecting jig that holds open end portions of both ends of a roller chain at a predetermined interval when the opened roller chain is connected in an annular shape.

  A general roller chain C includes an inner link L1 composed of a pair of rollers R1 and R2, a bush and an inner plate, and an outer link L2 composed of a pin and an outer plate. (See FIG. 7). When the roller chain C is attached to the sprocket, the work efficiency is high if the ring-shaped inner and outer links L1 and L2 are partly removed and opened. Then, after the roller R is engaged with the sprocket teeth, the connecting operation is performed to return the opened inner and outer links L1 and L2 to an annular shape. As the inner link L1, a pair of bushes provided adjacent to each other on the inner plate, and a roller R provided on each bush for rotation is generally used.

  In this connection operation, both ends of the opened roller chain C can freely rotate around the pins connecting the inner and outer links L1 and L2, so that it is difficult to position the inner links L1 to be connected to each other. Work is often troublesome. Therefore, it is preferable from the viewpoint of work efficiency that the work is performed using the roller chain connecting jig while holding the inner links L1 at both ends at a predetermined interval.

  An example of the roller chain connecting jig will be described with reference to FIG. The roller chain connecting jig 1 includes claw portions 2 and 2 provided facing each other so as to sandwich one roller R1 (a roller closer to the open end) of the inner link L1 to be connected, and both claw portions 2 2 that can be freely opened and closed in the connecting direction of the roller chain C, an adjustment screw 4 that is screwed into the link portion 3 to adjust the opening / closing amount of the both claws 2 and 2, a washer 5 and a retaining member 6 is provided with a base portion 7 which is provided so as not to be relatively movable in the axial direction with respect to the adjusting screw 4 and to be rotatable around the axis.

  On the outer side in the nipping direction of the claw part 2, a back part 8 formed with a taper 9 (forward taper 9 a) that approaches the claw part 2 facing the tip of the claw part 2, and on the link part 3 side from the back part 8 The contact part 16 which formed the taper (reverse taper) which leaves | separates from the nail | claw part 2 which opposes the front-end | tip of the nail | claw part 2 is formed. Further, on the inner side in the nipping direction of the claw portion 2, a nipping portion 11 having a taper (forward taper 9 d) that is closer to the claw side facing the tip of the claw portion 2 is formed. One of the rollers R1 is clamped by the clamping unit 11. In this way, both the back surface portion 8 and the sandwiching portion 11 are tapered, and the tip of the claw portion 2 is tapered, so that the tip is a pair of rollers R1 and R2 of the inner link L1 at the open end. The roller chain C can be easily connected by inserting it smoothly.

  As shown in FIG. 3 to be described later, the base portion 7 has a configuration in which a spacer 13 is sandwiched between two plate-like members 12 and 12. The plate-like members 12 and the plate-like member 12 and the spacer 13 are fixed by rivets 14. The spacer 13 forms a gap having a predetermined width between the plate-like members 12 and 12, and the claws 2 and 2 are passed through the gap. Since the size of the gap is slightly larger than the thickness of the claw portion 2, the claw portion 2 can be freely rotated within the gap.

  A handle 15 is provided at the tip of the adjustment screw 4. When the handle 15 is turned in the screwing direction, the adjustment screw 4 is screwed into the link part 3, and the link part 3 moves in a direction away from the base part 7. At this time, the abutting portion 16 of the claw portion 2 abuts on the outer two rivets 14 a and 14 a among the four rivets 14 provided on the plate-like member 12, and from the base portion 7 of the link portion 3. Along with the movement in the away direction, the contact portion moves to the tip side of the claw portion 2. Then, with the movement of the contact portion, the interval between the claw portions 2 facing each other is narrowed, and the inner links L1 at both ends of the roller chain C approach each other. When the inner links L1 are close to a predetermined position, a pin is inserted into the bushing of the inner link L1 and the outer plate P is attached, so that the roller chain C becomes one ring.

  When the inner links L1 are brought closer to each other using the roller chain connecting jig 1 shown in FIG. 7, the inner links L1 often stand on the roller chain connecting jig 1 side as shown in FIG. This is because when one roller R1 of the two rollers of the inner link L1 to be connected is sandwiched between the claw portions 2, the back surface portion 8 of the claw portion 2 is connected to the other roller R2 (open end portion) of the inner link L1. The inner link L1 stands up so that the line connecting the rollers R1 and R2 of the inner link L1 forms an angle perpendicular to the forward taper 9a of the back surface portion 8 due to this contact. Because is a stable attitude. When the inner link L1 stands in this way, the distance between the bushes of the inner link L1 to be connected changes, so that the insertion of the pins for providing the outer link L2 cannot be performed smoothly. For this reason, it may be necessary to once increase the interval between the claw portions 2 facing each other and perform this connecting operation again.

  Accordingly, an object of the present invention is to clamp the roller so that the inner link to be connected does not stand on the roller chain connecting jig side when the roller chain is connected.

In order to solve the above-described problems, the present invention includes a claw portion that is provided so as to sandwich the roller of the inner link to be coupled, and a link portion that supports both the claw portions so as to be openable and closable in the coupling direction of the roller chain. And a roller chain coupling jig having an adjustment member for adjusting the opening / closing amount of both the claw portions, a notch portion is formed on a back surface portion on the outer side in the clamping direction of the claw portion, and the notch portion is A forward taper approaching the opposing claw part toward the tip of the part and a reverse taper separating from the opposing claw part are sequentially formed, and a roller chain is configured by a clamping part that is inside the clamping direction of the claw part When one roller on the open end side of the two rollers of each inner link is clamped, a gap is formed between the notch portion and the other roller on the opposite side of the open end portion of the inner link. Is configured so that the spine Parts and adopting a configuration for preventing the contact between the other rollers.

  In this way, the notch is formed in the back surface portion to prevent the contact between the other roller and the back surface portion, so that the inner link stands up due to the contact force with the other roller. Can be prevented. For this reason, the distance between the bushes of the inner links to be connected is set to a predetermined value, so that the roller chain can be connected smoothly.

In the above-mentioned configuration, it is preferable to form a reverse taper in the holding portion with an inclination away from the claw portion facing the tip of the claw portion when the claw portion is opened.

  When a taper (reverse taper) having such an inclination is formed in the clamping part, when the one roller is clamped by the clamping part, a force for sliding the one roller to the back side of the claw part does not act. . Moreover, as the claw portions are closed, the opposite taper portions of the opposing clamping portions approach parallel to each other, and the stability of the clamping gradually increases. For this reason, the distance between the bushes of the inner links to be connected is set to a predetermined value, so that the roller chain can be connected more smoothly.

  In each of the above-described configurations, it is preferable that a receiving portion that holds the one of the sandwiched rollers is formed in the clamping portion.

  When the receiving portion is formed in this way, the sandwiched roller is firmly held by the receiving portion, and the roller does not slide inadvertently in the sandwiching portion during the connecting operation. For this reason, the distance between the bushes of the inner links to be connected is set to a predetermined value, so that the roller chain can be connected more smoothly.

  This invention employs a configuration in which a notch is formed on the back surface of the claw portion of the roller chain connecting jig. In this way, when one roller (the roller closer to the open end) of the inner link to be connected is clamped by the clamping portion of the claw portion, the back surface portion of the claw portion becomes the other side of the inner link. It is possible to prevent the inner link from standing on the roller chain connecting jig side by abutting against the roller (roller far from the open end). For this reason, the distance between the bushes of the inner link to be connected does not inadvertently change with the standing of the inner link, and the roller chain can be connected smoothly.

The front view which shows the state which inserted the front-end | tip of the nail | claw part in the inner link to connect in 1st embodiment of the roller chain connection jig | tool which concerns on this invention. The front view of the principal part which shows the state which made the inner links approach using the roller chain connection jig | tool shown in FIG. 1 is a perspective view of the roller chain connecting jig shown in FIG. The front view which shows the opening-and-closing state of the nail | claw part of the roller chain connection jig shown in FIG. The front view which shows the state which inserted the front-end | tip of the nail | claw part in the inner link to connect in 2nd embodiment of the roller chain connection jig | tool which concerns on this invention. The front view of the principal part which shows the state which made the inner links approach using the roller chain connection jig | tool shown in FIG. The front view which shows the state which inserted the front-end | tip of the nail | claw part in the inner link to connect in the roller chain connection jig concerning a prior art. The front view of the principal part which shows the state which made the inner links approach using the roller chain connection jig | tool shown in FIG.

  1 to 4 show a first embodiment of a roller chain connecting jig 1 according to the present invention. The roller chain connecting jig 1 includes claw portions 2 and 2 which are provided so as to sandwich one roller R1 of the inner link L1 to be connected, and both claw portions 2 and 2 in the connecting direction of the roller chain C. An axial direction with respect to the adjustment screw 4 by a link portion 3 that can be freely opened and closed, an adjustment screw 4 that is screwed into the link portion 3 to adjust the opening / closing amount of the both claws 2 and 2, a washer 5 and a retaining member 6. And a base portion 7 provided so as to be relatively unmovable and rotatable about its axis.

  A taper 9 (forward taper 9a) that approaches the claw part 2 that is opposed to the tip of the claw part 2 and a taper 9 (reverse taper) that is separated from the claw part 2 that is opposed to the back surface part 8 that is the outer side of the claw part 2 in the clamping direction. The notches 10 are formed by sequentially forming 9b). By forming the notch portion 10 in this way, the claw portion 2 is inserted between the pair of rollers R1 and R2 of the inner link L1, and one roller R1 (the roller on the open end side) is inserted into the claw. When sandwiched between the back portion 8 and the other roller R2, the gap is formed between the notch portion 10 and the other roller R2 (the roller on the side opposite to the open end) when sandwiched by the portion 2. Is prevented from coming into contact.

  As shown in FIG. 4, a taper 9 having a slope that is inclined away from the claw 2 facing the tip of the claw 2 when the claw 2 is opened is provided in the clamping 11 that is inside the claw 2 in the clamping direction. (Reverse taper 9c) is formed. Both reverse taper 9c, 9c approaches so that it may become parallel as the nail | claw part 2 is closed (refer the imaginary line in the figure), and the stability of clamping | pinning increases gradually.

  In this way, the back surface portion 8 and the other roller R2 are prevented from coming into contact with each other, and the roller R1 is stably clamped by the clamping portion 11 formed with the reverse taper 9c. The link L1 can be prevented from standing up inadvertently, and a connecting operation such as attachment of the outer link L2 can be performed smoothly.

  The base portion 7 has a configuration in which a spacer 13 is sandwiched between two plate-like members 12 and 12. The plate-like members 12 and the plate-like member 12 and the spacer 13 are fixed by rivets 14. The spacer 13 forms a gap having a predetermined width between the plate-like members 12 and 12, and the claws 2 and 2 are passed through the gap. Since the size of the gap is slightly larger than the thickness of the claw portion 2, the claw portion 2 can be freely rotated within the gap.

  A handle 15 is provided at the tip of the adjustment screw 4. When the handle 15 is turned in the screwing direction, the adjustment screw 4 is screwed into the link part 3, and the link part 3 moves in a direction away from the base part 7. At this time, the contact portion 16 formed on the link portion 3 side with respect to the back surface portion 8 of the claw portion 2 and having a taper having an inclination away from the claw portion 2 facing the tip of the claw portion 2 is formed on the plate-like member 12. While abutting against the two outer rivets 14a, 14a of the four rivets 14 provided on the (base portion 7), the abutting portion moves toward the tip side of the claw portion 2 as the link portion 3 moves. . Then, with the movement of the contact portion, the interval between the claw portions 2 facing each other is narrowed, and the inner links L1 at both ends of the roller chain C approach each other. When the pins are inserted into the bushes of the inner link L1 and the outer plate P (outer link L2) is attached while the inner links L1 are close to a predetermined position, the roller chain C becomes a single ring.

  In this embodiment, the cutout portion 10 is configured by two continuous forward tapers 9a and reverse tapers 9b formed on the back surface portion 8. However, the shape of the cutout portion 10 is not limited to this, and the back surface portion 8 and the other side are the same. As long as contact with the roller R2 can be avoided, it can be changed as appropriate. Further, instead of turning the handle 15 and turning the adjusting screw 4, a knob is provided on the adjusting screw 4, and the screwing amount may be adjusted by turning this knob. An adjustment member other than the adjustment screw 4 may be employed as long as the opening / closing amount of both the claw portions 2 and 2 can be adjusted.

  Further, in this embodiment, the base portion 7 is configured such that the spacer 13 is sandwiched between the two plate-like members 12, 12. However, the base portion 7 is configured by integrating the plate-like member 12 and the spacer 13. It can also be.

  5 and 6 show a second embodiment of the roller chain connecting jig according to the present invention. The roller chain connecting jig 1 has the same basic configuration as that of the first embodiment, but one roller R1 held by the holding part 11 of the claw part 2 slides in the holding part 11. The difference is that a receiving portion 17 for preventing the above is formed. For example, when the roller chain connecting jig 1 is used from the upper side of the roller chain C as in the configuration shown in FIG. 1, there is a possibility that one roller R <b> 1 sandwiched by the claw portion 2 slides downward. Therefore, by forming the receiving portion 17, such sliding can be prevented when one of the rollers R <b> 1 is held by the claw portion 2, and the distance between the bushes of the inner link L <b> 1 to be connected is set to a predetermined value. Thus, the roller chain C can be connected more smoothly.

1 Roller chain coupling jig 2 Claw part 3 Link part 4 Adjustment screw (adjustment member)
5 Washer 6 Retaining member 7 Base portion 8 Back surface portion 9 Taper 9a (Back portion) Forward taper 9b (Back portion) Reverse taper 9c (Ramp portion) Reverse taper 9d (Hold portion) Forward taper 10 Notch 11 Clamping portion 12 Plate member 13 Spacer 14 Rivet 15 Handle 16 Contact portion 17 Receiving portion L1 Inner link L2 Outer link R Roller R1 One roller R2 The other roller P Plate C Roller chain

Claims (2)

The claw portions (2, 2) provided to face each other so as to sandwich the roller (R) of the inner link (L1) to be connected, and both claw portions (2, 2) are opened and closed in the connecting direction of the roller chain (C). In a roller chain coupling jig comprising a link part (3) that is freely supported and an adjustment member (4) that adjusts the opening / closing amount of both claws (2, 2).
A notch (10) is formed in the back surface (8) which is the outer side in the clamping direction of the claw (2), and the notch (10) is a claw that opposes the tip of the claw (2). A forward taper (9a) approaching (2) and a reverse taper (9b) away from the opposing claw portion (2) are formed in sequence,
The clamping portion (11) sandwiched inward and ing of the claw portion (2), in the open state the pawl portion (2), the claw portion opposed about the tip of the claw section (2) (2) Forming a reverse taper ( 9c ) with a slope that separates ;
When one of the rollers (R1) on the open end side of the two rollers (R, R) of each inner link (L1) constituting the roller chain (C) is clamped by the clamping unit (11) A gap is formed between the notch (10) and the other roller (R2) on the opposite side of the open end of the inner link (L1), so that the back surface (8) A roller chain connecting jig, wherein contact between the first roller and the other roller (R2) is prevented. The roller chain connecting jig according to claim 1, wherein a receiving portion (17) for holding the one roller (R1) sandwiched is formed in the clamping portion (11).

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