JPH0713997Y2 - Band-shaped member pressing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a belt-shaped member pressing device configured to prevent contraction and deformation of a belt-shaped member after cutting by pressing a belt-shaped member near a cutting position.

2. Description of the Related Art The present applicant has previously proposed a device as shown in FIG. 4, for example, in order to press the band-shaped member near the cutting position and prevent the band-shaped member from contracting and deforming after cutting. In this structure, a plurality of pressing blocks 3 spaced apart in the width direction of the strip-shaped member 2 are provided above the strip-shaped member 2 near the cutting position 1.
And a cylinder 4 for moving each pressing block 3 toward and away from the strip-shaped member 2. Then, in such a device, first, the cylinder 4 is operated to bring the pressing block 3 close to the band-shaped member 2, and the band-shaped member 2 immediately after the cutting position 1 is pressed by the pressing block 3, and then the cutter 5 is pressed. To bring the cutter 5 closer to the strip-shaped member 2.
The band-shaped member 2 is cut at the cutting position 1 by. After this cutting, the pressing position by the pressing block 3 and the cutting position 1
The tip portion 6 of the belt-shaped member 2 located between (cutting tip)
Will be contracted and deformed as it is released from the restraint, but such contraction deformation is blocked by the pressing block 3.

Problems to be Solved by the Invention Here, the above-described device has no problem when the cross-sectional shape of the tip portion 6 of the belt-shaped member 2 is rectangular, but the cross-sectional shape of the tip portion 6 of the belt-shaped member 2 is For example, in the case of a shape that becomes thicker toward the center in the width direction as shown in FIG. 5, the pressing block 3 can be surely pressed and restrained only in the center part of the tip portion 6 in the width direction. In addition, the pitch between the pressing blocks 3 must be coarse due to the installation space of the cylinder 4, and as a result, the band-shaped member 2
A part that cannot be pressed is generated at both ends in the width direction of the. For this reason, there is a problem that both end portions in the width direction of the tip end portion 6 of the belt-shaped member 2 are locally contracted and deformed. Further, since only the inner edge portions of the pressing block 3 come into contact with both widthwise end portions of the tip portion 6, there is a problem that a linear scratch is generated on the surface of the tip portion 6. Further, such a device has a problem that the structure is complicated and expensive.

Therefore, it is an object of the present invention to provide a band-shaped member pressing device that has a simple structure and is inexpensive, and can reliably prevent the occurrence of scratches and the contraction and deformation of the band-shaped member after cutting.

Means for Solving the Problems An object of the present invention is a band-shaped member pressing device configured to prevent contraction and deformation of the band-shaped member after cutting by pressing the band-shaped member in the vicinity of the cutting position. Wider than the width of the member, and a plurality of slits extending from the distal end toward the proximal end are formed apart from each other in the width direction of the strip-shaped member,
The problem can be solved by providing a holding plate made of a thin leaf spring and a moving unit that brings the holding plate close to the belt-shaped member and brings the holding plate into contact with the belt-shaped member from the tip end side.

Action First, the moving means is operated to bring the pressing plate close to the cutting position of the band-shaped member, for example, immediately after the cutting position, and bring the pressing plate into contact with the band-shaped member from the tip side. As a result, the strip-shaped member near the cutting position is pressed by the pressing plate. Next, the band-shaped member is cut at the cutting position. When the band-shaped member is cut in this manner, the tip end of the band-shaped member is formed between the pressing position of the pressing plate and the cutting position (cutting tip). To be done. Here, a plurality of slits extending from the tip to the base end are formed in the holding plate so as to be separated from each other in the width direction of the band-shaped member, and moreover, since the holding plate is composed of a thin leaf spring, the band-shaped member is The tip end side of the holding plate which is in contact with can be deformed following the outer shape of the belt-shaped member. Moreover, since the width of the holding plate is wider than the width of the strip-shaped member,
The strip-shaped member can be pressed over the entire width. For this reason, even if the thickness of the strip-shaped member varies depending on the position in the width direction, for example, even if the thickness becomes thicker toward the center in the width direction, the strip-shaped member is pressed almost uniformly as a whole. Can be attached. As a result, it is possible to prevent a situation where the tip end portion of the belt-shaped member is partially contracted, deformed, or damaged. Moreover, in order to achieve such an effect, only the pressing plate and one moving means are required, and the structure is simple and the manufacturing cost is low.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, a conveyor 21 extends in the front-rear direction, and the conveyor 21 conveys a continuous belt-shaped member 22 such as a side tread rubber toward the front. This conveyor
Immediately before 21 is provided a receiving body 23 extending in the width direction of the belt-shaped member 22, and the lower surface of the belt-shaped member 22 is in sliding contact with the upper surface of the receiving body 23. Support plates 24 are provided on both sides of the front end of the conveyor 21, and both ends of a support rod 25 extending in the width direction of the conveyor 21 are rotatably supported on the support plates 24 above the front end of the conveyor 21. . The central portion of the support rod 25 and the holding body 26 fixed to the support rod 25
A base end portion of a rectangular holding plate 27 is attached between and. The holding plate 27 is composed of a thin leaf spring, and its thickness t is preferably within the range of 0.3 mm to 1.0 mm. The reason is that if the wall thickness t is less than 0.3 mm,
This is because the bending rigidity of the belt-shaped member 22 is reduced and the pressing force against the belt-shaped member 22 becomes too weak, while the wall thickness t is 1.0 m.
This is because if it exceeds m, the bending rigidity becomes high and it becomes impossible to follow the shape change of the belt-shaped member 22. Also, this holding plate
A plurality of slits 28 extending from the tip toward the base end are formed on the tip side of 27, and these slits 28 are arranged at equal distances in the width direction of the strip-shaped member 22. here,
The pitch P between these slits 28 is preferably in the range of 3 mm to 20 mm. The reason is that the pitch P is
Is less than 3 mm, the bending rigidity of the pressing plate 27 between the slits 28 is lowered, and the pressing force against the belt-shaped member 22 becomes too weak. The bending rigidity of the plate 27 is increased and the strip member 22 is
This is because it becomes impossible to follow the shape change of. The width W of the pressing plate 27 is wider than the width V of the belt-shaped member 22. A pinion 31 is fixed to one end of the support rod 25, and a rack 32 meshes with the pinion 31. The rack 32 is connected to the tip of a piston rod 35 of a cylinder 34 installed on the side of the support plate 24, and as a result, the cylinder 32
When the pressing plate 27 swings around the support rod 25 by the operation of 34, the tip end side of the pressing plate 27 in which the slit 28 is formed approaches or separates from the belt-shaped member 22. The pinion 31, the rack 32, and the cylinder 34 described above as a whole constitute a moving means 36 that brings the holding plate 27 close to the belt-shaped member 22 and brings the holding plate 27 into contact with the belt-shaped member 22 from the tip side. The receiving body 23
Just in front of the flat anvil extending in the width direction of the strip 22.
41 is installed, and the anvil 41 is moved up and down by an elevator mechanism (not shown). A cutter 42 is installed above the support rod 25. The cutter 42 is moved toward the anvil 41 by a driving mechanism (not shown), and cooperates with the anvil 41 to cut the belt-shaped member 22 at the cutting position S. Cut in the width direction at. The anvil 41 and the cutter 42 described above constitute a cutting means 43 for cutting the strip-shaped member 22 as a whole.

Next, the operation of the embodiment of the present invention will be described.

Now, the belt-shaped member 22 is attached to a molding drum (not shown) installed in front of the anvil 41 for almost one turn, and the cutting position S of the belt-shaped member 22, that is, the belt-shaped member is attached on the anvil 41.
Position that is separated from the cutting tip of 22 by one circumference of the forming drum,
Is located. Next, the cylinder 34 is operated to retract the piston rod 35, and the holding plate 27 is supported by the support rod 25.
Rock around. As a result, the pressing plate 27 approaches near the cutting position S of the belt-shaped member 22, here immediately after the cutting position S, and first comes into contact with the belt-shaped member 22 from the tip side where the slit 28 is formed. As a result, the belt-shaped member 22 is pressed against the receiving body 23 by the pressing plate 27. At this time, a gripping body (not shown) grips the belt-shaped member 22 immediately before the cutting position S. Next, the cutter 42 is moved toward the anvil 41, and the strip-shaped member 22 is cut in the width direction at the cutting position S by the cutter 42 and the anvil 41. In this way the strip
When 22 is cut at the cutting position S, the tip end portion 45 of the belt-shaped member 22 which is not restricted is formed between the pressing position of the pressing plate 27 and the cutting position S (cutting tip). Where the presser plate
27 has a plurality of slits 28 extending from the distal end toward the proximal end.
Are formed apart from each other in the width direction of the strip-shaped member 22, and since the pressing plate 27 is composed of a thin leaf spring,
The tip side of the holding plate 27 that is in contact with the belt-shaped member 22 is a belt-shaped member.
It can be deformed following the outer shape of 22. Moreover, since the width W of the pressing plate 27 is wider than the width V of the strip-shaped member 22,
The belt-shaped member 22 can be pressed over the entire width. As a result, even if the thickness of the strip-shaped member 22 varies depending on the position in the width direction, for example, the strip-shaped member 22 becomes thicker toward the center in the width direction, as shown in FIG. Can be pressed substantially uniformly. As a result, it is possible to prevent the distal end portion 45 of the belt-shaped member 22 from being partially contracted, deformed, or damaged. next,
The gripping body is moved toward the molding drum while rotating the molding drum, and the rear end portion of the belt-shaped member 22 is attached to the molding drum. As a result, a strip-shaped member 22 is formed around the molding drum.
Is pasted for one lap. Next, when it is time to supply the belt-shaped member 22 to the molding drum, the anvil 41 descends and then the gripping body grips the tip end portion 45 of the belt-shaped member 22. next,
The cylinder 34 operates, the piston rod 35 projects, and the holding plate 27 separates from the belt-shaped member 22. This allows the strip-shaped member
22 is released from pressing by the holding plate 27. At this time,
The gripping body moves toward the molding drum while gripping the tip end portion 45 of the belt-shaped member 22, and supplies the belt-shaped member 22 to the molding drum.

In the above-described embodiment, the pressing plate 27 is swung to bring the tip side of the pressing plate 27 closer to the band-shaped member 22 and press it.
Alternatively, the tip side of the holding plate 27 may be brought close to the band-shaped member 22 and pressed by lowering the 27 while keeping it inclined. Further, in the above-mentioned embodiment, the side tread rubber is used as the belt-shaped member, but a rubber sheet, a plastic sheet or the like may be used in this invention.

Effects of the Invention As described above, according to the present invention, it is possible to reliably prevent the occurrence of scratches and the contraction and deformation of the band-shaped member after cutting, while the structure is simple and inexpensive.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention, FIG. 2 is a plan view of a holding plate, FIG. 3 is a sectional view taken along the line II in FIG.
FIG. 4 is a front view of the vicinity of a conventional presser block, and FIG. 5 is a sectional view taken along the line II-II of FIG. 22 …… Strip member, 27 …… Holding plate 28 …… Slit, 36 …… Movement means S …… Cutting position, W …… Width of holding plate V …… Width of band member

Claims (1)

[Scope of utility model registration request] 1. A pressing device for a band-shaped member, wherein the band-shaped member near the cutting position is pressed to prevent contraction and deformation of the band-shaped member after cutting, the width of which is wider than the width of the band-shaped member, and A plurality of slits extending from the distal end toward the base end are formed apart from each other in the width direction of the strip-shaped member, and the pressing plate made of a thin leaf spring and the pressing plate are brought close to the strip-shaped member,
A band-shaped member pressing device comprising: a moving unit configured to bring the pressing plate into contact with the band-shaped member from the tip end side.