JP2008200830A - Chain connecting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chain connecting tool drawing both ends of a chain body in a short period of time. <P>SOLUTION: This chain connecting tool has: a pair of arm parts 3A and 3B respectively constituted by extending arm action parts 4a and 4b and arm operation parts 5a and 5b to the inverse side from an intermediate part, positioning the arm action parts 4a and 4b on one side of the intermediate part, arranging the intermediate part so as to superposably cross with each other and rotatably installed around a shaft on a shaft pin 14 penetrating through the superposed intermediate part; and a chain engaging member 10A having a pair of columnar engaging parts 11a fixed to the arm action parts 4a and 4b so as to project in the same direction to an equal distance position from the shaft pin 14 on the respective leading end sides of the arm action parts 4a and 4b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a chain connecting jig suitable for attaching a chain joint to both ends of a handrail drive chain of an escalator.

  A conventional chain mounting jig is composed of a pair of engaging members that are hooked on a chain and a jig main body that supports the engaging member, and one end of the engaging member is screwed to one end surface of the jig main body. The other of the engaging members is screwed to the other end surface of the jig body. Then, when the jig body is rotated in one direction, the pair of engaging members come close to each other, and when the jig body is rotated in the other direction, the pair of engaging members are separated (for example, Patent Documents). 1).

Here, in order to connect both ends of the chain to make them endless, an operation of pulling both ends of the chain and attaching the chain joint between both ends of the chain occurs.
And the connection between the both ends of the chain using the conventional chain attachment jig was performed as follows. That is, first, the jig body is rotated in the other direction while pressing the engaging member to separate the engaging members. Next, each of the pair of engaging members is engaged with each of both ends of the chain, and the jig main body is rotated in one direction to draw both ends of the chain. Furthermore, both ends of the chain are connected by attaching chain joints between the ends of the drawn chain.

JP 2000-42939 A

  However, when connecting both ends of the chain using a conventional chain mounting jig, the operation of rotating the jig body in both directions is required, and the ends of the chain cannot be pulled in a short time. The work efficiency of work was bad.

  The present invention has been made to solve the above-described problem, and an object of the present invention is to obtain a chain connection jig that can draw both ends of a chain body in a short time.

  The chain connecting jig according to the present invention is configured by extending an arm action part and an arm action part from the intermediate part to the opposite side, with the arm action part positioned on one side of the intermediate part, and the intermediate part Are arranged so as to cross each other, and are attached to a shaft pin passing through the stacked intermediate portion so as to be pivotable around the shaft, and from the shaft pin to each tip side of the arm action portion And a chain engaging member having a pair of columnar engaging portions fixed to the arm operating portion so as to protrude in the same direction at equidistant portions.

  According to the present invention, it is possible to draw the ends of the chain body in a short time, so that the work efficiency of the chain body connection work can be improved.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a perspective view showing a chain connection jig according to Embodiment 1 of the present invention, FIG. 2 is an exploded perspective view showing the chain connection jig according to Embodiment 1 of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a perspective view showing a chain main body connected by the chain connecting jig according to the first embodiment, FIG. 4 shows the periphery of both ends of the chain main body before connecting the chain main body using the chain connecting jig according to the first embodiment of the present invention; FIG. 5 is a perspective view showing a state where the engaging portions of the chain connection jig according to Embodiment 1 of the present invention are inserted into the bush holes at both ends of the chain body.

1 and 2, the chain connecting jig 1A has a pair of arm portions 3A and 3B, a connecting rotation shaft portion 13, and a chain engaging member 10A.
Each of the pair of arm portions 3A and 3B is formed in an elongated plate shape having substantially the same shape and the same size. Further, a pin insertion hole 3a is formed at an intermediate portion between the arm portions 3A and 3B. Furthermore, screw holes 3b are respectively formed at positions equidistant from the intermediate portion (pin insertion hole 3a) on one end side of the arm portions 3A and 3B.
Here, the portions from one end of each of the arm portions 3A and 3B to the middle portion are respectively referred to as arm action portions 4a and 4b, and the portions from the other end of each of the arm portions 3A and 3B to the intermediate portion are respectively referred to as arm operating portions 5a 5b.

At this time, each of the arm portions 3A and 3B is configured by extending the arm action portions 4a and 4b and the arm operation portions 5a and 5b from the intermediate portion to the opposite side. Furthermore, the arm portions 3A and 3B are arranged so that the arm action portions 4a and 4b are arranged on one side of the intermediate portion and the intermediate portions are overlapped to intersect each other. As will be described later, the arm portions 3A and 3B are rotatable around the axis of the shaft pin 14 penetrating the overlapped intermediate portion.
Also, the gripping portions 6a and 6b are configured by covering the arm operation portions 5a and 5b from the end portions to the vicinity of the intermediate portion with rubber.

  The chain engaging member 10A includes an engaging pin 11 including a cylindrical engaging portion 11a having a predetermined diameter, and a screw portion 11b protruding from the engaging portion 11a coaxially with the engaging portion 11a. Yes. The screw portion 11b can be screwed into the screw hole 3b of the arm action portions 4a and 4b so that the engagement portion 11a protrudes from the main surface of the arm action portions 4a and 4b in the same direction. ing. That is, the chain engaging member 10A is detachable from the distal end portions of the arm operating portions 4a and 4b.

  As shown in FIG. 2, the connecting rotation shaft portion 13 includes a shaft pin 14 having a screw thread 14 a only at the tip portion and a nut 15. The shaft pin 14 is inserted into the pin insertion holes 3 a of the arm portions 3 </ b> A and 3 </ b> B in a loosely fitted state, and one end side of the shaft pin 14 is screwed into the nut 15. Further, the other end side of the shaft pin 14 has a top portion 14b, and as described above, the pair of arm portions 3A and 3B are disposed between the nut 15 and the top portion 14b, and the shaft pin 14 It is attached to the shaft pin 14 so as to be rotatable around the shaft. That is, if the distance between the pair of gripping portions 6a and 6b is separated, the distance between the shaft centers of the engagement pins 11 is separated, and if the distance between the gripping portions 6a and 6b is close, the engagement is achieved. The distance between the axial centers of the pins 11 is close.

  If the arm action parts 5a and 5b are made longer than the arm action parts 4a and 4b by applying the known lever principle, the ratio of the lengths of the arm action parts 4a and 4b and the arm action parts 5a and 5b is determined. It is also possible to apply a force larger than the force applied to the gripping portions 6a and 6b to the distal ends of the arm operating portions 4a and 4b.

Next, the configuration of the chain 20 will be described. The chain 20 is, for example, a handrail drive chain of an escalator (not shown).
In FIG. 3, the chain 20 has a chain body 21 and a chain joint 30.
Further, the chain body 21 has an inner link mechanism 22 and an outer link mechanism 26.

The inner link mechanism 22 includes a pair of inner plates 23 arranged in parallel, and two bushes 24 that connect the inner plates 23. The bush 24 is formed in a cylindrical shape having a bush hole 24a. Each of the two bushes 24 has its axial direction perpendicular to the main surface of the inner plate 23 and is connected to the inner plate 23 with a predetermined distance between the shaft centers. The bush 24 is inserted into a hole corresponding to the diameter of the bush hole 24 a formed in the inner plate 23, and the opening of the bush hole 24 a is exposed on the surface opposite to the facing surface of the inner plate 23.
In addition, an annular roller 25 is fitted around the bush 24 so as to be rotatable coaxially with the bush 24 at a portion between the pair of inner plates 23.

  The outer link mechanism 26 has a pair of outer plates 27 having the same shape and the same size as the inner plate 23, fixed to one outer plate 27, and two connecting pins 28 protruding vertically from the outer plate 27. Yes. The distance between the shaft centers of the connecting pins 28 matches the distance between the shaft centers of the pair of bushes 24 that connect the inner plate 23.

The two connecting pins 28 are inserted into the bush holes 24a, and the other outer plate 27 is inserted into the distal ends of the connecting pins 28 protruding from the bush holes 24a. The connecting pin 28 is caulked and fixed to the other outer plate 27. Thereby, the two inner link mechanisms 22 are connected by the outer link mechanism 26.
Thus, the plurality of inner link mechanisms 22 are connected by the outer link mechanism 26, and the chain body 21 is manufactured to a desired length. At this time, the connecting pin 28 is not inserted into the bush holes 24a arranged at both ends of the chain body 21.

The chain joint 30 includes a joint plate 32 a having the same size and shape as the outer plate 27, and two joint pins 33 that protrude vertically from one surface of the joint plate 32 a and are longer than the connection pin 28. 31, a joint plate 32b having the same size and shape as the joint plate 32a, and a split pin 34 as a locking member.
At this time, the two joint pins 33 are arranged such that the distance A between the respective axes coincides with the distance between the axes of the bushes 24 that connect the inner plate 23 described above.

  The joint pins 33 are inserted into the bush holes 24a disposed at the ends of the chain body 21, and the tips of the joint pins 33 protruding from the bush holes 24a are inserted into the joint plate 32b. The chain main body 21 is connected in an annular shape by engaging the ends of the joint pins 33 protruding from the joint plate 32b with the split pins 34.

  Next, a method of pulling the chain main body 21 using the chain connecting jig 1A and connecting the chain main body 21 will be described with reference to FIGS.

  As an example of connection of both ends of the chain main body 21, there is a case where both ends of the chain main body 21 are connected after the chain main body 21 is wound around each of the spaced sprockets (not shown). As another example of connection, there is a method in which both ends of the chain main body 21 that has been separated to replace a part of the chain main body 21 that has been wound around the sprocket and connected in an annular shape are connected by a chain joint 30. Can be mentioned. In any case, an operation of pulling the inner link mechanisms 22 arranged at both ends of the chain body 21 and attaching the chain joint 30 to the inner link mechanisms 22 at both ends of the chain body 21 occurs.

When both ends of the chain body 21 are brought close enough to be connected by the chain joint 30, a large tension acts on the chain body 21 in a direction in which both ends of the chain body 21 are separated from each other.
The chain connecting jig 1A is for easily pulling both ends of the chain main body 21 against this tension.

First, as shown in FIG. 4, the distance between the pair of gripping portions 6 a and 6 b is separated so that the distance between the shaft centers of both engaging portions 11 a is separated from A or more. Then, as shown in FIG. 5, the engaging portion 11 a of the arm operating portion 4 a is inserted into the bush 24 from one opening of the bush hole 24 a disposed at one end of the chain body 21. Further, the engaging portion 11 a of the arm operating portion 4 b is inserted into the bush 24 from one opening of the bush hole 24 a disposed at the other end of the chain body 21.
At this time, the amount of insertion of both engaging portions 11a into each bush 24 is set to about half of the length of the bush 24.

From this state, the gripping force is applied to the pair of gripping portions 6a, 6b so that the distance between the pair of gripping portions 6a, 6b is close, and the shafts of the bushes 24 are resisted against the tension acting on the chain body 21. Approach the distance between the hearts. The distance between the shaft centers of the bushes 24 is set to A, and the distance between the shaft centers of the joint pins 33 is set to A.
In this state, each of the pair of joint pins 33 is inserted into the bush 24 from the other opening of the bush hole 24a and is inserted until it comes into contact with the engaging portion 11a inserted from the one opening of the bush 24.

Then, after the chain connecting jig 1A is separated from the joint link 31 and the engaging portion 11a is extracted from the bush hole 24a, the joint pin 33 so that the tip of the joint pin 33 protrudes from the other opening of the bush hole 24a. Push in.
Then, the joint plate 32b shown in FIG. 3 is inserted into the tip of the joint pin 33 so that the tip protrudes from the joint plate 32b, and the split pin 34 shown in FIG. By engaging, the connection of both ends of the chain body 21 is completed.

According to the first embodiment, the engaging portion 11a screwed to the distal ends of the pair of arm operating portions 4a and 4b brings the holding portions 6a and 6b of the pair of arm operating portions 5a and 5b into contact with and away from each other. Interlocked and separated. Accordingly, both ends of the chain main body 21 are separated from each other, and the engaging portion 11a can be inserted into the bush hole 24a in a state where no great tension is applied to both ends of the chain main body 21. Thereafter, both ends of the chain body 21 can be easily pulled by simply applying a gripping force to the gripping portions 6a and 6b so as to bring the gripping portions 6a and 6b close to each other.
Therefore, since both ends of the chain body 21 can be drawn in a short time, the workability of the connection work between both ends of the chain body 21 can be remarkably improved.

In addition, after the engaging portion 11a is inserted into the bush hole 24a, both ends of the chain main body 21 can be pulled with one hand, and the joint link 31 is pulled with the other hand while pulling both ends of the chain main body 21 with one hand. Can be inserted into the bush hole 24a.
Accordingly, the pulling operation of both ends of the chain main body 21 and the attaching operation of the joint link 31 can be performed in parallel, so that the workability of the connecting operation between both ends of the chain main body 21 can be further improved.

  Further, since the chain engaging member 10A is detachable with respect to the arm operating portions 4a and 4b, an engagement having a diameter suitable for the diameter of the bush hole 24a of the bush 24 in the chain 20 connecting both ends. The part 11a can be easily replaced.

  In the first embodiment, the pair of engaging portions 11a have been described as being arranged with their respective axial directions oriented in a direction perpendicular to the main surfaces of the arm operating portions 4a, 4b. The axial direction of 11a is not limited to the direction which is perpendicular to the main surfaces of the arm operating portions 4a and 4b, and the pair of engaging portions 11a are respectively connected to the tip ends of the pair of arm operating portions 4a and 4b. What is necessary is just to be provided in the said arm action | operation part 4a, 4b so that it may protrude in the same direction.

Embodiment 2. FIG.
6 is a perspective view of an engaging member of a chain connection jig according to Embodiment 2 of the present invention.
In FIG. 6, the chain engaging member 10 </ b> B of the chain connecting jig 1 </ b> B has an engaging pin 11, a mounting base 36, and a screw 37.

The mounting base 36 is formed in a hollow rectangular parallelepiped shape whose front and bottom surfaces are open, and a pair of side plates 36a and 36b, an upper plate 36c covering one short side of the side plates 36a and 36b, and an opening on the front side. A bottom plate 36d that covers one of the long sides 36a and 36b is provided.
The threaded portion 11b is fastened and fixed to the upper plate 36c so that the engaging portion 11a of the engaging pin 11 projects vertically from the outer wall of the upper plate 36c.

An insertion hole 36e is formed in the bottom plate 36d. The bottom plate 36d is fastened and fixed to the tip of the arm operating portion 4a (4b) by a screw 37 that passes through the insertion hole 36e and the screw hole 3b.
At this time, the mounting base 36 is disposed so as to cover the tip of the arm operating portion 4a (4b). That is, the side plates 36a and 36b are adjacent to each other without any gap along the both end surfaces on the distal end side of the arm action portion 4a (4b), and are perpendicular to the length direction of the arm action portion 4a (4b). The upper plate 36c arranged at the top closes the upper end of the arm action portion 4a (4b).

  Thereby, the axial direction of the engaging part 11a is matched with the length direction of the arm action part 4a (4b). Further, since the side plates 36a and 36b are provided without gaps along the side end surfaces of the arm operating portions 4a and 4b, the mounting base 36 is prevented from rotating around the axis of the screw 37.

  The method of pulling the chain main body using the chain connecting jig 1B and connecting the chain main body will be described in the same manner as in the first embodiment.

  According to the second embodiment, by using the mounting base 36, in the first embodiment, the axial direction of the engaging portion 11a oriented in the direction perpendicular to the main surface of the arm operating portion 4a (4b). Can be changed in the length direction of the arm operating portion 4a (4b). Therefore, in addition to the first embodiment, the arm portion 3A (3B) becomes an obstacle, and the engaging portion 11a protruding perpendicularly from the main surface of the arm operating portion 4a (4b) cannot be inserted into the bush hole. Even in this case, since the engaging portion 11a extends in the length direction of the arm portion 3A (3B), if there is a sufficient space in the axial direction of the bush hole, the inner link mechanisms at both ends of the chain body can be installed. It can be pulled easily to connect both ends of the chain body.

  In the second embodiment, the side plates 36a and 36b are provided. However, the mounting base 36 is firmly fixed to the arm action portion 4a (4b) and must be rotated around the axis of the screw 37. For example, the side plates 36a and 36b do not need to be provided.

  In each of the embodiments, the engaging portion 11a is described as being formed in a columnar shape. However, the engaging portion 11a is not limited to a columnar shape, and is formed in a columnar shape such as a square column. May be.

It is a perspective view which shows the chain connection jig | tool which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the chain connection jig | tool which concerns on Embodiment 1 of this invention. It is a perspective view which shows the chain main body connected by the chain connection jig | tool which concerns on Embodiment 1 of this invention. It is a perspective view which shows the both ends periphery of the chain main body before chain main body connection using the chain connection jig which concerns on Embodiment 1 of this invention, and a chain connection jig. It is a perspective view which shows the state by which the engaging part of the chain connection jig which concerns on Embodiment 1 of this invention was inserted in the bush hole of the both ends of a chain main body. It is a perspective view of the engaging member of the chain connection jig which concerns on Embodiment 2 of this invention.

Explanation of symbols

  1A, 1B Chain connection jig, 3A, 3B arm part, 4a, 4b arm action part, 5a, 5b arm operation part, 10A, 10B chain engagement member, 11a engagement part, 14-axis pin, 36 mounting base.

Claims (3)

Each of the arm action part and the arm action part is configured to extend from the intermediate part to the opposite side so that the arm action part is located on one side of the intermediate part and the intermediate parts overlap so as to cross each other. A pair of arm portions that are arranged and pivotally attached to a shaft pin that passes through the intermediate portion that is stacked,
A chain engaging member having a pair of columnar engaging portions fixed so as to protrude in the same direction at a position equidistant from the shaft pin on each distal end side of the arm acting portion;
A chain connection jig characterized by comprising:   2. The chain connecting jig according to claim 1, wherein the chain engaging member is detachably screwed to the arm operating portion.   The chain engagement member has a mounting base fixed to the arm action portion, and the engagement portion projects from the arm action portion so that an axial direction is aligned with a length direction of the arm action portion. The chain connection jig according to claim 1, wherein the chain connection jig is fixed to the mounting base.

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