JP3057699U - Rubber screen tensioning device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To make it possible to easily tension a rubber screen and to use a rubber screen of any thickness without reducing the width of the rubber screen. SOLUTION: A plurality of clamp fittings 13 are arranged at arbitrary intervals along an inner surface of a screen frame 6 and a key portion 12a of the retaining iron plate 12 along a locking iron plate 12 of a rubber screen 1, and an upper end of the clamp metal 13 is provided. The support portion 15 is brought into contact with the inner surface of the screen frame 6, the lower end hook 16 of the clamp 13 is hooked on the key portion 12 a of the locking iron plate 12, and the tip of the bolt 21 inserted into the screen frame 6 from the outside is detachably attached to the clamp 13. Screwed into the nut 18 which has been locked.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a rubber screen tensioning device in a vibrating sieve used for sieving crushed rock, gravel, coal, coke, and the like.

[0002]

[Prior art]

 FIG. 5 shows a known apparatus for tensioning a rubber screen in a vibrating sieve. In FIG. 5, a rubber screen 1 is formed by providing a large number of eye holes 1a in a rectangular plate made of abrasion-resistant rubber, and has a plurality of support bars extending in the width direction in the longitudinal direction (perpendicular to the paper). (Not shown) via cushion rubber. On both side edges of the rubber screen 1, a locking iron plate 2 having an L-shaped cross section which is long along its lower surface and an abutment plate 3 which is long along its upper surface are respectively abutted. A plurality of countersunk bolts 4 are inserted from the bottom across the plate 3 at predetermined intervals so that the tips of the bolts 4 project into the counterbore holes 3a provided in the plate 3, and are inserted through washers 5a. The nut 5 is fastened, whereby the locking iron plate 2 and the contact plate 3 are fixed to the rubber screen 1.

The locking iron plate 2 is mounted on a support frame 7 fixed to the inner surface of the screen frame 6 with the key 2a of the locking iron plate 2 facing upward. Then, the lower end hook 8a of a long clamping bar 8 made of a channel steel or a ball angle steel is hooked on the key portion 2a, and a plurality of bolts 9 are arranged at predetermined intervals over the clamping bar 8 and the screen frame 6. A nut 10 is fastened to the end of the screen frame 6 through a washer 10a, and the clamping bar 8 is rotated clockwise with the upper end in contact with the inner surface of the screen frame 6 as a fulcrum. At 8a, the locking iron plate 2 is pulled toward the screen frame 6, and the rubber screen 1 is tensioned.

However, the rubber screen tensioning device uses a long clamping bar 8 parallel to the longitudinal direction of the rubber screen 1 and inserts a bolt 9 with a head from the inside thereof. Depending on the thickness of the screen 1, the contact plate 3 on the rubber screen 1 is located right beside the head 9 a of the bolt 9, and the head 9 a of the bolt 9 interferes with the corner of the contact plate 3 or the rubber screen 1 and Since it becomes difficult to insert the bolt 9, it is necessary to investigate the mounting position and pitch of the bolt 9 in advance, and to cut out the corresponding portion of the bolt 9 on the abutment plate 3 or the rubber screen 1; There was a problem that sieving materials such as quarries clogged between the head 9a of No. 9 and the corners of this plate 3 or the rubber screen.

When the gap between the bolt head 9a and the plate 3 or the rubber screen 1 is widened in order to prevent the above-mentioned interference and clogging of the sieving material, the width of the rubber screen 1 is reduced, and the plate 3 is removed. If the nut 5 is omitted and the nut 5 is directly stacked on the rubber screen 1 via the washer 5a, the sieving material such as the quarry will hit the tip of the bolt 4 or the nut 5, so that the nut 5 is loosened or the bolt 4 or the nut 5 is removed. There were problems such as damage. Further, since the sieving material such as the quarry directly hits the clamping bar 8, there is a problem that the noise is intense and the clamping bar 8 wears quickly.

Conventionally, since the upper surface of the locking iron plate 2 and the lower surface of the abutment plate 3 are formed flat respectively, by tightening the countersunk bolts 4 and the nuts 5, the side edges of the rubber screen 1 are removed. A portion corresponding to the side of the countersunk bolt 4 protruded from the edge of the plate 3, and the hole 1a of the rubber screen 1 was deformed. Further, conventionally, since the locking iron plate 2 is pulled almost horizontally by the clamping bar 8, the locking iron plate 2 easily dances up and down on the support frame 7, thus increasing noise.

[0007]

[Problems to be solved by the invention]

 The first problem of the present invention is that when the rubber screen is tensioned by attaching the clamping bar, the head of the fixing bolt of the clamping bar does not interfere with the rubber screen itself or the contact plate thereon. Another object of the present invention is to provide a rubber screen tensioning device that can easily tension the rubber screen, can use any thickness as the rubber screen, and does not need to reduce the width thereof. The second problem is that the bolt tip and nut protruding above the rubber screen and the tensioning device can be protected and prevented from being worn, and the rubber screen does not hinder the tensioning operation. The provision of an edge cover. The third problem is to prevent the rubber screen 1 from protruding and deforming the holes 1a. Further, a fourth problem is to suppress the locking iron plate 2 from dancing up and down on the support frame 7 to reduce noise.

[0008]

[Means for Solving the Problems]

 The invention according to claim 1 solves the first problem described above, in which a locking iron plate having a long key-shaped cross section is formed along the lower surface of the side edge of the rubber screen, and the key portion is formed on the side of the rubber screen. Rubber fixed so that it faces upward outside the edge, puts the above-mentioned locking iron plate on the support frame fixed inside the screen frame, hooks the key and draws it to the left and right screen frames In the screen tensioning device, a plurality of clamps are arranged at arbitrary intervals along the locking iron plate of the above-mentioned rubber screen and over the inner surface of the screen frame and the key portion of the locking iron plate. The supporting part is brought into contact with the inner surface of the screen frame, the lower hook of the clamp is hooked on the key of the locking iron plate, and the tip of the bolt inserted from the outside into the screen frame is detachably attached to the clamp. Characterized in that as screwed in the nut.

In the above rubber screen tensioning device, a rubber screen to which a locking iron plate is attached is placed on a support frame of a screen frame, and a plurality of clamps and a nut are respectively locked on the support frame. The rubber screen can be tensioned in the width direction by arranging the bolts at arbitrary intervals in this state and then screwing the bolts inward from the outside of the screen frame into the nuts. And the above-mentioned clamp is not a long one extending over the entire length of the rubber screen as in the conventional clamping bar, but is a short one in which a plurality of the clamps are arranged at an arbitrary interval in the longitudinal direction of the rubber screen. In addition, since the clamp fittings are not long bolts but rather short nuts compared to the bolts, even if the rubber screen is thick, it will be engaged with the side edges of the rubber screen. It can be easily placed by inserting it between the upward key of the clasp and notching a part of the rubber screen or reducing the width of the rubber screen to prevent interference between the nut and the rubber screen. There is no need to make it narrower, and the clamp bracket can be shortened, so its weight is lighter and rubber screen mounting work is easy. It made.

[0010] The invention described in claim 2 solves the second problem together with the first problem, and in the device described in claim 1, a side edge of the rubber screen is formed along the upper surface. A vertical L-shaped plate with a bead formed at the upper end of the vertical portion is fixed so that the vertical portion is located on the inner side in the width direction, and the vertical portion is fixed to the vertical portion. A rubber side edge cover consisting of an inclined portion extending from the upper end of the vertical portion toward the inner surface of the screen frame beyond the upper portion of the clamp, and a flange portion hanging down from both ends of the inclined portion, is attached to the lower end base of the inclined portion. The vertical groove formed on the lower surface is fitted to the vertical portion of the plate from above the ball so as to be fixed to the plate, and extends downward from the inner side in the width direction of the vertical groove of the lower end base. Cover the vertical portion.

In the device according to the second aspect, the horizontal portion, the vertical portion, the clamp, and the like of the plate interposed between the side edge of the rubber screen and the screen frame are covered with the side edge cover. Quarrying and other sieving raw materials do not enter the inside of the rim cover, and do not damage them by colliding with this plate or clamp fittings. Since the side edge cover is made of rubber, it can be fixed to the vertical portion of the plate by press-fitting, and once fixed, does not easily come off due to vibration or the like. In addition, since it is made of rubber, the length can be adjusted by cutting as necessary.

According to a third aspect of the present invention, there is provided an apparatus for solving the third problem in addition to the first and second issues. A plurality of triangular ridges are respectively provided on the upper surface of the locking iron plate so as to project in parallel with the length direction, and the plate and the locking iron plate are fixed to the rubber screen with bolts and nuts. The side edge of the rubber screen can be prevented from protruding from the side of the tightening portion by the nut and the nut, so that the eye hole of the rubber screen is not deformed.

A device according to a fourth aspect of the present invention solves the fourth problem in addition to the first to third problems. In the device according to the third aspect, the clamp fitting is provided on a support frame. The key portion of the locking iron plate is formed to be pulled obliquely downward, and the key portion is pressed against the support frame on which the locking iron plate is placed, so that the dance is suppressed and noise is reduced.

[0014]

[Embodiment of the invention]

 1 and 2, an abutment plate 11 fixed to the upper surface of the side edge portion of the rubber screen 1 has a length substantially equal to that of the rubber screen 1, and has an L-shaped cross section including a horizontal portion 11a and a vertical portion 11b. A plurality of triangular ridges 11c protruding from the lower surface of the horizontal portion 11a in parallel with the length direction (the direction perpendicular to the paper surface) are formed, and a round bar-shaped bead 11d is formed at the upper end of the vertical portion 11b. The vertical portion 11b is fixed on the rubber screen 1 such that the vertical portion 11b is located inside in the width direction. On the other hand, along the lower surface of the side edge portion of the rubber screen 1, a locking iron plate 12 having a length substantially equal to that of the rubber screen 1 is fixed with the key portion 12a facing upward as in the conventional case. However, the locking iron plate 12 has a plurality of triangular ridges 12b parallel to the length direction on the upper surface on the side in contact with the lower surface of the rubber clean 1.

The abutment plate 11, the rubber screen 1, and the locking iron plate 12 are connected to the tips of a plurality of countersunk bolts 4, which are passed upward from below the locking iron plate 12, through nuts via washers 5 a. 5 are fixed to each other by tightening. At this time, since a plurality of triangular ridges 11c and 12b are respectively provided on the lower surface of the abutment plate 11 and the upper surface of the locking iron plate 12, the edge rubber of the rubber screen 1 is inserted at the insertion portion of the flat head bolt 4. Does not protrude to the side, the mounting of the clamp fitting 13 described later becomes easy, and the eye hole 1a is not deformed. Further, when the rubber screen 1 is attached, it is possible to prevent the rubber hole 1 from being damaged due to deformation of the rubber screen 1 at the bolt hole portion.

The rubber screen 1 is mounted on the lower support frame 7 fixed to the side screen frame 6 via the locking iron plate 12. The key portion 12a of the locking iron plate 12 is fixed in tension by a plurality of clamps 13 arranged at intervals of several tens of centimeters along the locking iron plate 12. This clamp 13 replaces the conventional long clamping bar 8 (see FIG. 5), and can be made by cutting the clamping bar 8. However, the one shown in FIGS. An elongated hole 14a in the vertical direction is provided in the center of the plate 14, a square bar is fixed along the upper edge of one surface to form an upper end support portion 15, and a round bar is fixed along the lower edge of the same one surface. The lower end hook 16 is hooked on the key portion 12 a of the locking iron plate 12, and the upper end support portion 15 is applied to the inner surface of the screen frame 6. A hexagonal long nut 18 is vertically slidably inserted into the long hole 14a, and a locking plate 17 fixed to the rubber screen side end is locked to the edge of the long hole 14a. The tip of a hexagonal bolt 21 passed through the bolt hole 6a of the screen frame 6 is inserted into the nut 18 from the outside of the screen frame 6 via a spring washer 19 and a locking washer 20, and the rubber screen 1 is tightened by tightening.

In FIG. 1, reference numeral 22 denotes a side edge cover made of a rubber plate which is detachably fixed to the contact plate 11 on the rubber screen 1, and extends from the vertical portion 11 b of the contact plate 11 to the clamp 13. It is composed of an inclined portion 22a which rises obliquely toward the inner surface of the screen frame 6 beyond the upper portion, and a flange portion 22b which hangs down from both ends thereof, and is long in the front-rear direction, for example, about half the length of the rubber screen 1. (See FIG. 2). On the lower surface of the base 23 integrally formed at the lower end of the inclined portion 22a, a vertical groove 23a has a constricted portion in the middle in the depth direction, and the ball 11d at the upper end of the vertical portion 11b of the plate 11 is press-fitted. A leg portion 24 is formed so as to be formed so as to be able to extend, and extends downward in the width direction from the vertical groove 23a. As shown in the figure, the vertical groove 23a is fitted into the bead 11d to fit the vertical plate 23a. When the side edge cover 22 is fixed to the rubber screen 1, the leg portion 24 comes into contact with the upper surface of the rubber screen 1 and covers the vertical portion 11b of the contact plate 11.

In the above structure, the abutment plate 11 and the locking iron plate 12 are fixed to the side edges of the rubber screen 1, and the rubber screen 1 is placed on the support frame 7 of the screen frame 6. The clamp 13 is placed on the locking iron plate 12 at the position where the bolt hole 6a is opened, with the long nut 18 inserted into the long hole 14a of the rectangular plate 14. At this time, the length of the rectangular plate 14 is short, and the long nut 18 is merely inserted into the long hole 14 a. Therefore, even if the thickness of the rubber screen 1 is large, the clamp 13 is placed on the locking iron plate 12. The clamp fitting 13 can be easily placed, and then the hexagonal bolt 21 is screwed into the long nut 18 from the outside of the screen frame 6 through the spring washer 19, the locking washer 20 and the bolt hole 6a in order. The rubber screen 1 is tensed through.

Next, the lower surface of the base 23 of the side edge cover 22 is brought into contact with the bead 11 d on the vertical portion 11 b of the plate 11, and the base 23 is hit with a hammer or the like from above to thereby form the vertical groove 23 a on the lower surface of the base 23. The lower end of the leg 24 following the base 23 is in contact with the upper surface of the rubber screen 1, and the upper end of the inclined portion 22 a of the side edge cover 22 is in contact with the inner surface of the screen frame 6. The side space 11 is covered with the inclined portion 22a of the side edge cover 22 and the banner-shaped flange 22b before and after the inclined portion 22a. Therefore, the sieving material such as crushed rock does not flow on the clamp 13 or the plate 11 during the operation of the sieving machine and does not damage them. Since the side edge cover 22 is made of rubber, its length can be adjusted by cutting and removing one end as necessary.

In the embodiment shown in FIG. 4, the upper end supporting portion 15 of the clamp 13 is formed in the shape of a low ridge, the lower end hook 16 is formed in a flange shape, and the square plate 14 is formed on the screen frame 6. Lean against it. A triangular base 25 made of a chevron material is superimposed on the outside of the screen frame 6 so that one side 25a of the triangular base 25 is substantially parallel to the rectangular plate 14, and a hexagonal bolt 21 inserted into the one side 25a and the screen frame 6 is provided. Is screwed into a long nut 18 fitted in the long hole 14a of the rectangular plate 14, and by this screwing, the locking iron plate 12 is pulled obliquely downward through the lower end hook 16, and And the dance is suppressed.

[0021]

[Effect of the invention]

 As described above, according to the present invention, the rubber screen can be easily tensioned as compared with the conventional one, and any rubber screen having any thickness can be used and its width can be reduced. No need to do. According to the invention described in claim 2, the abutment plate and clamp fittings on the side of the rubber screen can be protected from sieving materials such as quarrying, and wear thereof can be prevented. It is easy and the length can be adjusted by cutting. According to the third aspect of the present invention, it is possible to prevent the side edge of the rubber screen from protruding, and to prevent deformation of the eye of the screen. Further, according to the invention, the key portion of the locking iron plate can be pressed on the support frame to suppress the dance and reduce noise.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view of a clamp.

FIG. 4 is a cross-sectional view of another embodiment of a clamp.

FIG. 5 is a longitudinal sectional view of a conventional device.

[Explanation of symbols]

1: Rubber screen 1a: Eye hole 6: Screen frame 7: Support frame 11: Abutment plate 11a: Horizontal portion 11b: Vertical portion 11c: Triangular ridge 12: Locking iron plate 12a: Key portion 12b: Triangular ridge 13: Clamp Hardware 14: Square plate 14a: Slot 15: Upper end support 16: Lower hook 18: Long nut 19: Spring washer 20: Locking washer 21: Hex bolt 22: Side edge cover 22a: Inclined portion 22b: Flange 23: Base 23a: vertical groove 24: leg

Claims (4)

[Utility model registration claims] 1. A locking iron plate having a long key-shaped cross section is fixed along a lower surface of a side edge of a rubber screen so that a key portion thereof faces upward outside a side edge of the rubber screen. In a rubber screen tensioning device that is placed on a support frame fixed inside the screen frame, the key portion is hooked and drawn to the left and right screen frames, the inner surface of the screen frame along the locking iron plate of the rubber screen. And a plurality of clamps over the key of the locking iron plate are arranged at arbitrary intervals, the upper end support of the clamp is brought into contact with the inner surface of the screen frame, and the lower hook of the clamp is attached to the key of the locking iron plate. A rubber screw, wherein a tip of a bolt inserted from the outside into the screen frame is screwed into a nut detachably engaged with the clamp. -A screen tensioning device. 2. A long plate having a horizontal portion and a vertical portion along the upper surface of a side edge of a rubber screen, and having a L-shaped cross section having a ball edge formed at the upper end of the vertical portion. A rubber side fixed to the vertical portion, comprising a sloped portion extending from the upper end of the vertical portion toward the inner surface of the screen frame from above the clamp, and a flange portion hanging down from both ends of the sloped portion. The edge cover is fixed to the abutment plate by fitting a vertical groove formed on the lower surface of the lower end base of the inclined portion to the vertical portion of the aforesaid plate from above the ball, and is fixed to the vertical plate of the lower end base. The tensioning device for a rubber screen according to claim 1, wherein the vertical portion is also covered with a leg extending downward from the widthwise inside. 3. A plurality of triangular ridges are respectively provided on the lower surface of the horizontal portion of the plate in contact with the upper surface of the rubber screen and the upper surface of the locking iron plate in contact with the lower surface of the rubber screen to project in parallel with the length direction. The tensioning device for a rubber screen according to claim 2, wherein the plate and the locking iron plate are fastened and fixed to the rubber screen with bolts and nuts. 4. A tensioning device for a rubber screen according to claim 3, wherein the clamp is formed so as to pull a key portion of the locking iron plate on the support frame obliquely downward.