Summary of the invention
The present invention mainly provides a kind of elastic band automatic cut-to-length device, can be with elastic band according to predetermined length segmentation and flow to next process.
Above-mentioned technical matters of the present invention is mainly solved by following technical proposals: a kind of elastic band automatic cut-to-length device, it comprises can draw close with clamping elastic band, and the upper pressure wheel and the binder driving wheel that can move with the elastic band of actuating clamping along center steering separately, and drives this binder motor initiatively the crop rotation center steering and the may command rotational angle.During operation, upper pressure wheel and binder driving wheel are drawn close, both outer circumference surface clamping elastic bands, and motor-driven binder driving wheel rotation, under the effect of friction force, binder driving wheel revolution and drive elastic band and move forward; Because the diameter of binder driving wheel holding part can know that as long as the degreeof turn of control binder driving wheel, promptly may command is rotated the elastic band length that moves with the binder driving wheel; The degreeof turn of binder driving wheel is controlled by the rotational angle of motor output, therefore, when motor is done intermittent start and stop with certain rotational angle, elastic band can be sent with certain length segmentation; This structure because the motor rotational angle can and be adjusted by the control system setting, therefore can satisfy the demand of different length segmentation, that is this structure can satisfy the elastic ring making of multiple different sizes; The axial length of upper pressure wheel and binder driving wheel is variable, but the elastic band of the multiple different in width of clamping is made needs so also can satisfy the elastic ring of different in width.
The drawing close and separate of upper pressure wheel and binder driving wheel can be realized by straight-line motion mechanism or flip-flop movement mechanism or swinging gear; As preferably, the described upper pressure wheel heart therein is provided with the feeding upper pressure axial, is provided with bearing between the two; Described feeding upper pressure axial end be connected with make upper pressure wheel perpendicular to feeding upper pressure axial centerline direction swing so that upper pressure wheel is drawn close or away from the swinging gear of binder driving wheel.Establish the feeding upper pressure axial at the upper pressure wheel center, but make the upper pressure wheel rotation; Upper pressure wheel is swung above the binder driving wheel, and the spacing at upper pressure wheel and binder driving wheel two ends is easy to be consistent in the swing process, and the surface both spacing keeps evenly being beneficial to Clamping force and being evenly distributed on the elastic band surface when being convenient to draw close; In addition, also can make compact overall structure, working space takies less.
In the process of clamping, damage elastic band for avoiding excessive compression, multiple adoptable counte-rplan are arranged, for example control the minimum spacing between maximum grip power or control upper pressure wheel and the binder driving wheel, the elastic mechanism that comprises spring for example is set again, keeps certain elasticity when making two-wheeled clamping elastic band; As preferably, described swinging gear comprises in rotary cylinder and the feeding presses pole, presses pole one end to be connected in the piston rod that feeding upper pressure axial, the other end are connected in rotary cylinder in this feeding.Press pole to be equivalent to the swing arm of swinging gear in the feeding, adjust its length or adjust the distance of two connecting portions on it, can adjust the swing diameter of upper pressure wheel; Rotary cylinder makes the adjustable size of Clamping force whole as drive source; Under identical or cooresponding Clamping force, the rotational angle of rotary cylinder output can be different, and the two-wheel spacing is correspondingly different thereupon, make the elastic band of different-thickness or elastic band in uneven thickness, all can avoid excessive compression and are protected.
In the work, elastic band uses up when replenishing new elastic band, when perhaps changing the elastic band of other specifications, the elastic section of taking the lead need place between upper pressure wheel and the binder driving wheel in advance, this process is that trailer coupling drives the elastic band head and passes between upper pressure wheel and binder driving wheel, elastic band is between the two-wheeled carries out the fixed length segmentation for clamping; For enough spaces of passing through are provided between two-wheeled, as preferably, described binder driving wheel and motor are connected with motor mounting rack, and this motor mounting rack is provided with lifting mechanism.
As preferably, described lifting mechanism comprises bracing frame, slide rail and is located at cylinder on the bracing frame; The piston rod of described cylinder is connected in motor mounting rack; Support frame as described above and motor mounting rack constitute sliding block joint by described slide rail.The lifting mechanism of this air cylinder driven, rising or falling speed is fast, is suitable for the automated production of high beat; And can have long lifting distance, thereby between two-wheeled, provide the bigger space of passing through.
Slide rail can adopt the linear motion guide of standard specification, also can adopt nonstandard design-calculated structure; As preferably, described slide rail comprises two slide-bars that be arranged in parallel, is sheathed on two slide-bars and constitutes the slide of bearing fit with it, and two pairs of supports being located at two slide-bar two ends; Described slide is fixedly connected on motor mounting rack, and described support is fixed in bracing frame.This structure, simple in structure, be easy to make, cost is lower.
For improving the sliding capability of slide rail,, between described slide-bar and slide cod is installed as preferably.Cod endwisely slips along slide-bar, makes the force of sliding friction between slide-bar and slide less, and is mobile more steady, is suitable for quick travel; For ease of installing, as preferably, described slide is a pair of, is divided on two slide-bars.This split slide carriage structure is convenient to make processing, and reduces cost of manufacture.
The binder driving wheel can coaxially be provided with motor, also can be set up in parallel; Can directly join, also can make intermediate drive by transmission device; As preferably, described binder driving wheel and motor are set up in parallel on motor mounting rack, binder driving wheel center and motor shaft axis parallel, and chain drive or cog belt transmission device are set between the two constitute and be in transmission connection.Binder driving wheel and motor are set up in parallel, and both are in homonymy, can reduce taking of axial space, and being convenient to provides more space for the installation of other mechanisms; The type of belt drive of chain-driving, cog belt transmission comparatively steadily, friction, Shaochong hit, make the two-wheeled hitch feed not be prone to the elastic band obscission, what is more important, it also has synchronism preferably, can avoid intermediate drive to occur skidding etc. and cause driving error, the rotational angle and the motor output angle of binder driving wheel correspondingly are consistent, can fully guarantee the accuracy of elastic band section length.
Upper pressure wheel and binder driving wheel clamping elastic band, and the friction force by contact surface is carried elastic band; Be to improve the friction force of clamping face, as preferably, described binder driving wheel is a metal material, on its outer circumference surface annular knurl is set; Described upper pressure wheel is rubber or plastic material.When upper pressure wheel and binder driving wheel are drawn close elastic band are carried out clamping; there is certain impact phenomenon in the holding action of mechanical actuation; upper pressure wheel is made as rubber or plastic material; it has certain elasticity; the available buffer holding action is to the impact of elastic band; avoid the elastic band surface impaired, further improve protective capability elastic band because of excess impact causes.Can choose suitable material according to the different size elastic band,, avoid elastic band between two-wheeled, to skid and influence the accuracy of fixed length to keep enough friction force.
In sum, the present invention has following beneficial effect: 1, can be to elastic band according to the predetermined length segmentation and send; The operation full automation, simple, convenient; 2, the mode that adopts control motor rotational angle is to the segmentation of elastic band fixed length, and fixed length has higher accuracy; The motor output angle is easy to control, easy to adjust, can carry out the fixed length segmentation to the elastic band of different length demand; 3, the swinging gear that adopts rotary cylinder to drive can be adjusted Clamping force easily, makes the elastic band clamping reliable, and can protect the elastic band damage that is not squeezed fully; In addition, providing identical or during cooresponding Clamping force, the rotational angle of rotary cylinder output can be different, making the elastic band of different-thickness or elastic band in uneven thickness, also can avoid excessive compression and be protected; 4, the mode of upper pressure wheel and the clamping of binder driving wheel can adapt to the use needs of different in width elastic band; 5, be provided with lifting mechanism, make between upper pressure wheel and the binder driving wheel the bigger space of passing through can be provided, pass for the mechanism of outside traction elastic band; 6, chain-driving or cog belt transmission are set between binder driving wheel and motor, make rotation between the two keep good synchronism, thereby keep the accuracy of fixed length effectively; 7, simple and reasonable for structure, overall operation speed is fast, has higher production efficiency, is suitable for the production in enormous quantities manufacturing of elastic ring.
The specific embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: a kind of elastic band automatic cut-to-length of the present invention device, as shown in Figure 1, it comprises can draw close with clamping elastic band, and the upper pressure wheel 19 and the binder driving wheel 39 that can move with the elastic band of actuating clamping along center steering separately, and drive this binder driving wheel 39 do center steering and by the motor 36 of control system control rotational angle.Binder driving wheel 39 is a metal material, on its outer circumference surface annular knurl is set; Upper pressure wheel 19 is the rubber material.
Feeding upper pressure axial 20 ends be connected with make upper pressure wheel 19 perpendicular to feeding upper pressure axial 20 centerline directions swings so that upper pressure wheel 19 is drawn close or away from the swinging gear of binder driving wheel 39; Swinging gear comprises in rotary cylinder 15 and the feeding presses pole 17, presses pole 17 1 ends to be connected in the piston rod that feeding upper pressure axial 20, the other end are connected in rotary cylinder 15 in this feeding.Rotary cylinder 15 is fixed on the blank adapter plate A21 by support 16, and blank adapter plate A21 is provided with blank adapter plate B13.
Binder driving wheel 39 is set up in parallel on motor mounting rack 35 with motor 36,36 axis parallels of binder driving wheel 39 centers and motor, and chain 32 and sprocket wheel 33 formations being in transmission connection between the two is set between the two.Motor mounting rack 35 and pulley bracket 40 are fixed on stay bearing plate 22 corresponding hole site, then motor 36 are installed to motor mounting rack 35 relevant positions, and gear 33 is installed on the motor shaft.Binder driving wheel 39 centers are provided with rotating shaft 38, and rotating shaft 38 two ends are connected on motor mounting rack 35 and the pulley bracket 40 by two bearings 37.
Motor mounting rack 35 bottoms are provided with lifting mechanism; Lifting mechanism comprises bracing frame 26, slide rail and is located at cylinder 31 on the bracing frame 26 that the piston rod of cylinder 31 is connected in motor mounting rack 35; Bracing frame 26 and motor mounting rack 35 constitute sliding block joint by slide rail.Bracing frame 26 comprises base plate, side plate 28, backing plate 29.Cylinder 31 is fixed on the backing plate 29 by cylinder support 30.
Slide rail comprises two slide-bars that be arranged in parallel 24, is sheathed on two slide-bars 24 and constitutes the slide 25 of bearing fit with it, and two pairs of supports 23 being located at two slide-bars, 24 two ends; Slide 25 is fixedly connected on motor mounting rack 35, and support 23 is fixed in bracing frame 26; 25 of slide-bar 24 and slides are equipped with cod 27; Slide 25 is a pair of, is divided on two slide-bars 24.Be pressed into cod 27 in take-up housing 25 holes respectively and adjust distance, then slide-bar 24 is passed cod 27, install support 23 at its two ends, then slide 25 is screwed stay bearing plate 22 relevant positions, again cylinder 31 is connected with respective aperture place, stay bearing plate 22 bottom, adjusts respective distance and be fixed firm.
Specific embodiment described herein only is that casehistory is made in design of the present invention.For the technical personnel of the technical field of the invention, can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.