JPH0518512Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a structure for preventing joint pins from coming off at joints of conveyor belts such as filter cloths and belts.

(Prior art) Conventionally, as a joint for an endless filter cloth for transporting sludge used in a sludge filter cloth traveling type dehydrator, a large number of metal loops have been provided protruding from both ends of the filter cloth in a comb-like shape. Generally, a structure is used in which a group of loops on one end is wedged between the group of loops on the other end, and a joining pin is inserted into the ring formed by both loop groups. In order to prevent the joining pin from coming off, both ends of the joining pin inserted into the ring are bent at right angles. However, with this conventional joining pin retaining structure, while the filter cloth passes between many rolls, the bent end of the joining pin rises and hits the roll surface, removing the coating agent or lining agent on the roll surface. There was even a risk that the filter cloth would peel off or come into contact with a meandering detector or the like, causing malfunction, or that the bent end portion would be stretched back to its original straight line and fall out of the loop group.

(Problems to be Solved by the Invention) The purpose of the present invention is to eliminate the drawbacks of the conventional joining pin retaining structure.

(Means for solving the problem) In order to achieve the above object, the joining pin retaining structure of the present invention has a large number of loops protruding from both ends of the conveyor belt to be joined, and a group of loops at one end. is inserted between the loops on the other end, and one joining pin is inserted into the ring formed by both loops.At the joint part, an end plate with approximately the same diameter as the outside diameter of the ring is inserted. A plurality of cylindrical or cylindrical insert members that can be freely inserted between the ring and the connecting pin protrude from one surface, and a locking pawl that extends in the radial direction to approximately the outer diameter of the ring is provided on the insert member. A protruding retaining piece is inserted and engaged between the ring and the connecting pin with its end plate facing the tip of the connecting pin at the left and right ends of the joint. It has a configuration in which the retaining claw is secured to the loop. An example implemented in a joint part of a filter cloth will be described below with reference to the drawings.

First, the joint in this example has a large number of loop fittings 1 formed by forming claws 2, 2 facing each other on both ends of a metal wire bent into a substantially U-shape as shown in the first, second and third figures. By sandwiching the end portions of the filter cloth 3 within the U-shape at both ends of the filter cloth 3, loops 4 are formed parallel to each other with a certain small interval and a certain length from the ends of the filter cloth 3. Each of the loop groups 4..., 4... is attached in a protruding state, and the loop groups 4..., 4... are attached in a protruding state.
The loop group on one end is inserted between the loop groups on the other end, and a joining pin 5 made of one metal rod is inserted into a tunnel-shaped ring R formed by both loop groups. The connecting pin 5 has both ends slightly protruding from the left and right end loops, and synthetic resin or metal retaining pieces 6 are attached to both ends. It has been done.

The structure of the retaining piece 6 is as follows. As shown in FIG. 3 and 4, 4a, 4b,
A cylindrical insertion tube 8 having an appropriate length and a diameter that can be inserted between the ring R and the joining pin 5 is protruded concentrically from one surface of the circular end plate 7 having approximately the same diameter as the outer diameter of the ring R, and On the outer circumferential surface of the tip of the insertion tube 8, two locking claws 9, 9 extending radially to approximately the outer diameter of the ring R are provided at opposite positions on the diameter of the insertion tube. be. In this example, the insertion tube 8 has a length that allows insertion of up to five loops 4, and the locking claws 9, 9 are serrated and sloped low toward the tip.

To attach such a retaining piece 6,
First, a ring R is formed by inserting the loop group 4 on one end of the filter cloth 3 between the loop group 4 on the other end.
After inserting the joining pin 5 into the filter cloth 3, the ends of the filter cloth 3 are brought together slightly to transform the ring R into a horizontally long oval shape, and in this state, the insertion tube 8 is inserted into the locking claw 9. , 9 in the long diameter direction of the oval ring R,
It is inserted between the oval ring R and the joining pin 5, and with its end plate 7 facing the tip of the joining pin 5, one of the locking claws 9, 9 is locked to the loop 4, and it falls off. to prevent By attaching the retaining pieces 6, 6 to both the left and right ends of the joint pin 5 in this manner, the end plates 7, 7 prevent the ends of the joint pin 5 from coming off.

Another embodiment 6a of the retaining piece shown in FIGS. 5, 5a, 5b, and 5c has two insert plates 8a by making a cut in the insertion tube 8 of the retaining piece 6 of the above example,
8a, and the other structures are substantially the same as the above example. The retaining piece 6a of this example has plates 8a, 8a inserted between the circular ring R and the joining pin without deforming the ring R into an oval shape during installation.
When inserted immediately, the insertion plates 8a, 8a are elastically displaced, and the locking claws 9a, 9a elastically pass through the loops to reach a predetermined locking position.

Still another embodiment 6b of the retaining piece shown in Figs. 6, 6a, 6b, and 6c has four insertion bars 8b protruding from the end plate 7b, and the other structure is substantially the same as that in Figs. 5 to 5c. Same example.

Note that the joints of the conveyance belt to which this invention is applied are not limited to those having the above-mentioned structure; for example, a loop fitting made by bending a single metal wire into a spiral shape is attached to both ends of the conveyance belt. There is also a structure in which a large number of loops are attached to protrude from the end of the conveyor band by inserting the loops, and joining pins are inserted into both loop groups to join them as in the above example.

(Effects of the invention) According to the joint pin slip-off prevention structure of the conveyor belt joint of the present invention, the end plates can prevent both ends of the joint pin from coming off and hold the joint pin in a prevented state. Since the end plate has approximately the same diameter as the outer diameter of the ring, there is no risk of damaging the roll surface or causing malfunction of the detector when the conveyor belt passes between the rolls, allowing normal conveyance. can be continued.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a partially omitted plan view of the joint part, FIG. 2 is an enlarged cross-sectional view taken along the - line in FIG. 1, and FIG. 3 is a cross-sectional view taken along the - line in FIG.
4 is a front view of the retaining piece, FIG. 4a is a top view of the same, FIG. 4b is a bottom view of the same, FIG. 5 is a front view of another example of the retaining piece, and FIG. 5a is a plan view of the same, Fig. 5b is a bottom view of the same, Fig. 5c is a vertical sectional view of the same, Fig. 6 is a front view of still another example of the retaining piece, Fig. 6a is a plan view of the same, Fig. 6b is a bottom view of the same, and Fig. 6b is a bottom view of the same. Figure 6c is a longitudinal sectional view of the same as above. 3...Filter cloth, 4...Loop, 5...Joining pin,
R... Ring, 6, 6a, 6b... Retaining piece,
7, 7a, 7b... end plate, 8... insertion tube, 8a...
...Insert plate, 8b...Insert bar, 9, 9a, 9b...
...Latching claw.

Claims (1)

[Claims for Utility Model Registration] A large number of loops are protruded from both ends of the conveyor belt to be joined, and a group of loops on one end is inserted between a group of loops on the other end, and both loop groups are formed. In the joint part in which one joint pin is inserted into the ring formed by the ring, a plurality of or At the left and right ends of the joint part, a retaining piece is provided which protrudes a cylindrical insertion member and has locking claws projecting from the insertion member in a radial direction up to approximately the outer diameter of the ring. , with the end plate facing the tip of the joint pin, the insertion member is inserted between the ring and the joint pin, and the locking claw is locked to the loop to attach the conveyor belt joint part. Joint pin retaining structure.