JPS59144467A - Racket press - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press for the frame of a racket used in games such as tennis.

Tennis, Racket Pole, Met 9 Minton, Sukhwarashrakerat and Sukhwarash Tennis are played in 1. If the frame of such a racket were made of wood, the frame would warp or warp and no longer maintain the desired flatness. Therefore, players apply a pressing force to the frame of the racket when the racket is not in use.

A typical press for a wood frame racquet includes a pair of press frames or platens to cover both sides of the racquet. The press frames are held together at some corners by threaded bolts and wing nuts, and the bolts and nuts are tightened to press the press frame against both sides of the racket frame. The bolts and wing nuts used in such presses are problematic because they protrude a considerable distance from the press frame. Those bolts and nuts come into contact with objects and get stuck. They are especially troublesome because they tend to get caught on players' clothing or rub against their skin.

The racket press disclosed in British Patent No. 656365 has a number of slide cams 1 at the end opening of the press frame.
Eliminates the protruding zipper by making a smart addition. In such a racquet press, the cam member should slide easily and be held in the tightened position without being easily loosened. Such racquet presses can also be cumbersome to use. To retain the press frame when the cam member is loosened (because there are no fasteners at the corners, the two press frames wobble vertically and rotate relative to each other). The present invention provides a racket press with a cam actuated tightening mechanism. The tightening mechanism eliminates fasteners or any objects protruding from the plane of the press.The cam mechanism is easy to operate and moves one press frame relative to another in 17 rotations. In short, the preferred embodiment of the racquet press according to the present invention is Includes upper and lower spaced apart platens for covering both sides of the racquet head. A movable pressure-applying cam actuating means bridges the space between the platens and covers both sides of the weighted platen. It extends along one edge.

A pressure acting cam actuating means is movable relative to the platen between an open position and a clamped position. The open position allows the platens to separate to allow a racquet head to be inserted between the platens. In response to movement to the clamping position, the pressure applying member moves to urge the cam into contact with the cam follower, clamping the platens together and applying pressure to both sides of the racket head 8. In this case, an elongated cam follower extends along the outer edge of one of the platens.A spaced aligning means extends along the outer edge of the opposing platen.The cam actuating means extends along the outer edge of one of the platens. It has a long tapered cam surface. The cam surface engages the cam follower and the cam actuating means has a long bearing surface that engages the bearing means. A spring force is applied to the bearing means on the one hand and the cam follower on the other hand. The cam actuating means is slidable along a defined passageway adjacent the outer end of the platen and engages the earring surface with the bearing means during movement along the confined passageway. and cams the platens toward each other against the biasing force of the springs as the cam surfaces move into increasing contact with the cam followers. These and other features are discussed in the detailed description below. It will be better understood by referring to the accompanying drawings.

Referring to FIGS. 1 and 2, a racquet press 10 according to the present invention includes a pair of spaced apart, parallel upper and lower platens 12, 14, respectively, with a first platen inserted between the platens. It rests on the upper and lower surfaces of the head of the racket 16, which are indicated by the 1st quadrant in the figures and FIG.

The upper platen 12 has a generally chi-shaped central portion 18 and a pair of laterally spaced elongated right and left outer frames interconnecting the right and left ends, respectively, of the X-shaped central frame portion 18. The frame structure includes members 20 and 22. The lower platen 14 is the same as the upper platen and has an X-shaped central portion 19 and a pair of right and left frame members 21, 23 that are connected to the right and left ends of the X-shaped central frame. The frame of the platen is shaped so that when the racket head 9 is inserted between them, the X-shaped frame portion 18 extends between the ends of the racket head frame and overlies the main central portion of the racket head. ing. The right frame members 20.21 of the upper and lower platens sandwich the right hand portion of the racquet frame, and the left frame members 22.23 sandwich the left portion of the racquet frame. The right side frame member 20.21 and the left side frame member 22.23 match the curvature of the right (+1) and left side of the racket frame. The ends of the left frame members 22 and 23 are fitted with suitable clamps 24 made of elastic material or other non-scratch material so as to be pressed into contact with the upper and lower surfaces of the racket frame. Pressure pad 26 for contacting the top and one part surface
has.

The structural members of each platen are preferably channel-shaped in cross-section, with only the corners of the frame being solid to provide a corresponding base for each pressure point. It has become. However, the structural members of each platen can also be solid in cross-section. Although the narrow configuration of the open frame platen shown in the figures is preferred, the platen may have other shapes and configurations, including solid frames as well as open frames, without departing from the scope of the invention. The platen is preferably racket 1
It can be made from a variety of synthetic materials that are stiffer than the wood frames of No. 6. Although gold (such as steel or aluminum) is preferred, plastic or wood materials such as propylene or sulfone can also be used.

1-5 illustrate one example of a press clamp mechanism for clamping the platen 12, 14 against both sides of the racquet head 16. According to the present invention, the platen can be tightened without the use of an object such as a screwdriver with bolt holes projecting from the face of the platen. The press clamping mechanism shown in FIG. 1 includes a slidable cam-acting press clamping assembly 28, which is connected to the outer end 60 of the right frame member 20.21 of the upper and lower platens 1.2.14, respectively. It extends adjacent to and overlaps the outside of it. The same slidable cam press clamp assembly 32 extends adjacent and overlapping the outer end 64 of the left frame member 22,23.

The right-hand press clamp 28 includes an elongated slide member 66 which is VC-shaped in cross-section. The longitudinal extent of the slide member 36 seen in FIG. 1 is a y-arc and corresponds to the curved shape of the outer end 30 of the overlapping platen. A longitudinal slot opening 1:138 (see FIGS. 4 and 5) extends across the slide 9 member slot 6 and faces toward the adjacent end slot 0 of the platen. Fourth
As shown in Figures 5 and 5, Throno l-'58
is the upper end 40 having a relatively weak angle of taper ξ-.
Additionally, the upper end 40 tapers more widely from left to right as viewed in FIGS. 4 and 5, extending in a straight line from one end of the slide member 66 to the other.

Slot 68 also has a lower end 69 that extends across slide member 66. The lower end roller 9 is a horizontal surface, that is, the upper and lower platens 12. , parallel to the plane created by 14, there is one ia (:c7) for each member of the plane L().

Q/8 - Lowered - Upper end 40 is slide 8 member Ro 4
during use provides a cam surface for sliding back and forth within the upwardly open channel of the generally U-shaped longitudinal channel 42 extending along the end slot 0 of the upper platen. The channel 42 has an elongate upwardly facing outer wall 44 and a second
(See figure) The outer wall extends from the end lobes 0 at a laterally spaced interval and approximately parallel to the end lobes 0. A long narrow slot is formed for slidably receiving portion 40. The camming surface 40 of the slide member is significantly longer than the channel 42. In this manner, the channel 42 is confined within the channel formed by the slide member. Preferably, channel 42 is formed by folding the outer lip of frame member 2o to form a long slot along the Ill edge of the platen. Channels can also be attached to the sides of the platen by welding pre-formed channels or by attaching them to the side edges of the platen with rivets or other fasteners.
The outer end 60 of the base platen 21 is stepped at its midpoint so that when the press is viewed in FIGS. It forms an upright end 46 located directly below the left upright end of channel 42 . Spring clip 4
8 is rigidly secured to a portion of the outer end 50 of the platen inwardly of the stepped upright end 46. Preferably, clip 48 is an upwardly open, generally U-shaped channel secured to end 30 by welding. Spring clip 48 secures one end of torsion spring 50 to lower platen end 60. Preferably, the torsion spring has continuous spaced elongate legs at the loop end, similar to conventional safety bottle springs. Clip 48 can take other forms;
In addition to the clip, the lower leg of the torsion spring 50 is pressed firmly against the end 30 of the lower platen 14 so that the distal leg of the spring protrudes from the underside of the channel 42. It is press-fit tightly into a channel formed by a tab or the like. The tip of the spring is held in place by protruding through a hole in the upright end wall of the channel facing into the page in FIG. Other means to secure the distal leg of the spring, such as by folding the top of the channel outer wall 44 to clamp the spring from the outside of the channel 42 adjacent the AV 4. II. You can also use the spring 50 in this way.
is confined within the channel formed by the slide 8 member. This spring also has a cam surface 40 in channel 4.
Apply spring force at the position where it engages with 2.

A pair of longitudinally spaced rollers 54 (also referred to herein as bearing means) are attached to the outer end 30 of the lower platen 14 on either side of the spring. During use, these rollers roll back and forth in narrow channels formed in the bottom of slide member 66. Figures 4 and 5
As best shown in the figures, the rollers rest on the inner surface 56 of the narrow base of the slide member 6.

The openings at each end of the channel or slide member 66 have separate upper and lower rubber inserts 5, respectively.
8 and 60 (see Figure 3). An elongate rubber insert 62 extends along the outer edge of the slide member from one end to the other end. Both ends of the rubber insert 62 are tightly gripped between the upper and lower inserts 58 and 60. As best shown in FIGS. 1 and 2, the central portion of the rubber insert 62 projects outwardly along the outer edge of the slide member 66. Each slide 8 is preferably used with a protruding rubber portion 62 to facilitate manual gripping of the slide 36, 36' during use of the press, as described below.
Part 36? It can be a single piece metal channel.

The press clamping assembly 32 on the opposite side of the racquet press 10 is structurally similar to the clamping assembly 28 described above. The same reference numerals are used in bold in FIGS. 1 and 2 to indicate corresponding elements of the clamping assembly 62.

During use of the racquet press shown in FIGS. 1-5, the slide members 66 and 66' move between the open position shown in FIG. 5 and the closed position shown in FIGS. 6 and 4. can move between. In the open position, the upper and lower platens may be separated by a sufficient distance to allow the racquet head 16 to be inserted therebetween. The press platen is in the open position with cooperating cam surfaces 40 and 42 held in contact by contact between the long bottom surface of the slide 9 member and the spaced rollers and by direct pressure provided by the springs. It is stable due to the contact 1 between the two. A torsion spring 50 is normally compressed between the platens and urges the platens apart when the slide member is moved to the open position, as shown in FIG. After the racket is inserted between the platens, the platen presses into the racket head 9.
It is mated to the frame of the racket so that it is abutted against both sides of the frame. The slide member 36.36' is then grasped by hand and slid along the ends 1 of the platen towards the locking position shown in FIGS. During sliding, the roller 54 rolls on the bottom inner portion of the channel-shaped slide member, and the surface 40 slides along the upwardly curved bottom of the channel 42. The cam surface 40 and the cam of the channel 42 The sliding contact between the driven surfaces acts to squeeze the two platens against each other and applies a strong force to both sides of the racquet head frame.When viewed in FIG. The rubber inner on the right side acts as a stopper to stop the slide member in the tightened position.
> Engages with o-ra 54. Similarly, the rubber insert at the left end of the slide member when viewed in FIG. 5 engages with the roller of the left bridge 11 [2, slide member 36. ．． 36' is stopped in its open position. Torsion spring 50 is normally compressed to maintain cam surface 40 in sliding contact with the base of channel 42 as the slide member moves between its open and tightened positions.

In the racquet press variant shown in FIGS. 1 to 5, the slide 9 member roller 6 has a concave cross section closed at the ends and the end rollers 6 of the upper and lower platens.
The inner wall may extend adjacent to the inner wall. The inner wall of such a cylindrical slide 9 member has a narrow lower slot extending generally parallel to the bottom or base of the slide member, and the axle of the roller 54 is located within the slot.

The inner wall of the slide member also has a narrow upper slot or cam groove extending in an angled plane with an outwardly extending projection or cam follower fixed to the end slot of the upper platen. It extends into the groove. Therefore, when the slide members are moved relative to the ends of the upper and lower platens, the projecting cam followers slide within the cam grooves to squeeze the platens against the racket held between them. . In this configuration, for example, the torsion spring 50 can be omitted.

The racquet press shown in FIGS. 1-5 has the advantage of eliminating the press frame of conventional racquet presses with protruding objects such as protruding bolts and wing nut type fasteners. Each slide member 36.3
6' has a generally narrow configuration as shown in FIG. 2, with the maximum extent of the upper and lower ends of each slide member being between the upper surface of upper platen 12 and the lower surface of lower platen 14.

Further, the slide member 9 is moved between its open and closed positions along a path parallel to the racket head position and closely adjacent the ends of the platens 12 and 14.

Therefore, whether the press is in its open or closed position, the press tightening lever mechanism G does not protrude a substantial distance from the platen.

FIGS. 6 and 7 show another press 110 according to the present invention having a sliding cam-operated press tightening mechanism. Is the press 110 upper and lower? , IS' main 112, 114 and press tightening device 128 extending along the right edge of the platen as viewed in FIG.
Including etc. To the left of press 110 (ilt
The same press tightening device along the 2nd floor is not shown in the lower 7th figure. Press tightening layer f! 1
2B has the same slide member sound 1 as slide member 6.
：ld゛1ro6, the slide member member is upper and r
)'--((・ru.

The slide member 1 and 6 have a renomy effect (tko, "ru").
moved between an open position and a closed position by a handle mechanism;
This is when the slide member is manually slid between the open position and the closed position.
) This is a modification of the press. The lever mechanism shown in FIGS. 6 and 7 includes a knob 70 with a cross section h''-&-&yo 0-shaped. The shape of the nozzle 70 corresponds to the outer shape of the upper and lower platens 1.2.
0.12.1 in close parallel relation to the curvature of the outer end 160. A pivot bin 72 pivotally connects one end of the nozzle 70 to the upper and lower platens.

Preferably, the nozzles have recesses 1 through 7 projecting from the upright ends of the upper and lower platens, as seen in FIG.
Be hinged to 4. A pair of spaced parallel link arms 76,78 extend between the nozzle 70 and the slider 166. Figure 7 shows one side clearly.
4-, the link arms 76, 78 are attached to the nozzle 70 by corresponding pivot pins 80.
·ing. The opposite ends of link arms 76,78 are hinged to the outer end of slide member 166 by pivot pins 82.

In use, slide members 1 and 6 are moved to the open position by manually grasping each handle 70 and rotating them away from the outer edge of the platen. This rotation causes the link arms 76, 78 to move outwardly away from the outer ends of the Kepra-jn, causing the slide members to move into the open position (as in the press 10 shown in FIG. 5). The cam surface of the slide member is then pressed against the cam follower at the end 11 of the racket. A racket is then inserted between platens 112,114. To tighten the slide member 1 6, the hunt 9 luer 0 is rotated about the axis of the pivot pin 72 and moved toward the outer end of the platen (clockwise direction as viewed in FIG. 6). In its closed position, the camming surface of the slide member clamps the two platens against the racket frame. In the closed position, the hunt 9 Luer 0 covers the slide member and the entire structure has a narrow configuration that does not protrude beyond the lower surfaces of the upper and lower platens 112, 114, respectively.

FIGS. 8-10 illustrate yet another variation of the invention in which a racket press 210 has pressure acting springs 1/2 at the upper and lower ends of the outer hem along both ends of the platen.
-Includes ξ-90. The left pressure-applying lever (as viewed in FIG. 8) is shown for simplicity. Each pressure-applying lever 90 is made from a simple piece of wire rod 9 bent at its center to form a rounded central portion 91 and a pair of spaced legs 92, 93; The legs extend over each other and taper to become wider in the direction away from the rounded central portion 91. The lever 90 is made of spring metal so that the legs can spread apart from each other against the normal biasing forces of the spring. When the pressure on the spring is released, the legs are returned to their tapered position with respect to each other as shown in FIG. 9, free r'l of the lever arm.
l+j are bent toward each other thereby forming a pair of concentric pivot posts 94 that are rotatably fitted within corresponding coaxial holes 915 in the upper and lower platens. Holes 95 extend through corresponding four-part regions 96 at the ends of the upper and lower platens. As best shown in Figures 9 and 10,
The ends 92, 9 immediately adjacent the posts 94 are rounded and project toward the surface of the corresponding quadrant 9. The rounded outer portions of the legs form opposing, curved cam surfaces 98 which are shaped when a compressive force is applied to the legs of the spring lever. A compressive force is applied to the platen by compressing the four-part region 96.

In use, lever 90 is rotated about post 94 to move the lever between an open position shown in phantom in FIG. 8 and a closed position shown in solid line in FIG. lever 90
When the is rotated towards the platen, i.e. into its closed position, a force l of the legs 92°93 causes the surface 98 to move upward! Move into pressure engagement with recessed area 96 of the shrimp lower platen. This action squeezes the platens together and exerts pressure on both sides of the racquet held between the platens. Adjusted by a load force adjustment channel 99, each load force adjustment channel is slidable along the longitudinal direction v of the corresponding needle. As the channel 99 is slid wider than the taper of the leg, the compressive force of the spring lever increases. This increases the pressure on the upper and lower platens by the cam surface 98 during use of the lever, preferably a coil spring (diagrammatically indicated at 100 in FIG. 9).
It extends between the upper and lower platens along an axis coincident with pivot post 94 of Kalever 90 . The upper and lower portions of the coil spring surround the upper and lower pivots of a collar 90, N-strike 94. Coil spring 100 is a stiff spring that, when pressure is released from lever 90, pulls the platens apart a distance sufficient to receive a racquet contained between the platens. A racquet press is provided having a cam actuated pressure acting member extending along both ends of the racquet press. In each embodiment of the invention, a cam surface of a movable pressure applying member is moved from an open position to a clamped position relative to a cam follower surface on at least one of the press platens. At tightening position 1#, pressure action 1/level; l
(r) The cam action acts to clamp the two platens together and applies a large force of pressure to the frame of the racket. Whether the press is in the open or closed position of 1, the pressure acting member and the cam and cam follower) are confined within the maximum extent of the lower platen, and the racket is in its closed position. At position 11, the pressure-applying members approach the opposing platens at both ends and are parallel to each other. It's growing. Therefore, the present invention provides 11'
When using a racket press of '71 Figure 2g1 is an embodiment of a racket press according to the principles of the present invention. FIG. 2 is a partially cutaway cross-sectional view taken along line 2-2 of FIG. 2g1; FIG. 5 is a cross-sectional view taken along line 4--4 of FIG. 1 showing the press in the closed position; FIG. Figure 6 is a partial plan view showing a modified row of racquet presses; Figure 7 is a section taken along line 7--7 of Figure 6; FIG. 8 is a partial plan view showing still another modification of the racket press according to the present invention; FIG. 9 is a view taken along line 9--9 of FIG. 8; FIG. FIG. 2 is a cross-sectional view taken along line 10-10 of FIG.

Patent applicant: William Carleton-Kynard
given name)

Claims (10)

[Claims] (1) In a racket press comprising upper and lower platens for engaging both sides of a pair of spaced apart and substantially parallel kerato heads, and means for applying pressure to both sides of the racket head. , the pressure applying means is
an elongated cam follower extending along an outer edge of the platen; and spaced bearing means disposed on the outer edge of the platen in opposition to the platen over which the cam follower extends. , a cam follower ball is also engaged with the phaser, the cam actuating means having an elongated bearing surface that engages the spaced bearing means; the other including a spring biasing means biased between the cam follower and the cam follower, the cam actuating means being slidable along a restricted passageway adjacent the outer end of the platen; engaging the bearing surface with the bearing means during movement along the confined path of;
A racquet press characterized in that the platen is cam-guided toward each other against the biasing force of a spring as the tapered cam surface moves into increasing pressure contact with the cam follower. (2) The racquet press of clause 1, wherein the bearing means includes spaced rollers fixed to the outer end of the platen, the rollers being aligned in a plane extending at an angle to the cam surface. . (3) the rollers are spaced apart by a distance greater than the length of the cam follower, and the rollers are arranged so that the first roller engages the cam actuating means to act as a stop means at each end of the range of movement of the cam follower; Section 2 racket press. (4) The racket press according to item 6, wherein the cam actuating means has a large C-shaped channel shape, and the spring biasing means, roller, and cam follower are confined within the channel. (5) The racket press according to item m1, wherein the cam operating means has a large C-shaped channel shape, and the spring biasing means, bearing means, and cam follower are confined within the channel. (6) The racquet press of claim 5, wherein said elongated cam actuating means is longitudinally curved to conform to a corresponding curved shape of the outer end of said platen. (7) The racquet press of claim 1, wherein said elongated cam actuating means is longitudinally curved to conform to a corresponding curved shape of the outer end of said platen. (8) The first part that engages one surface of the racket head.
a second platen spaced from the first platen for engaging an opposite surface of the racket head 9, the space between the two platens being a racket head. An outwardly facing cam surface on each platen and a movable cam on the outer end of the platen push the platens toward each other, thereby causing the platens to cradle. means for moving the cam into engagement with a cam surface to apply pressure to both sides of the head 50, the movable cam including a manually operated lever and moving the lever toward the outer end of the platen. and means for pivotally connecting one end of the lever to the platen for movement toward and away from the lever, the cam being on the lever when the lever is rotated toward the platen. A racket press characterized by being rotated so as to come into pressure contact with a platen-shaped cam surface. (9) said lever arms taper with respect to each other ft;
9 pressure springs are formed of elongated wire rods with long legs, and the free ends of the legs of the springs are attached to the corresponding platens for normal compression so that the springs press the platens against each other. The racket press of paragraph 8, including the means for (10) A force adjustment means as defined in clause 9, including force adjustment means slidably engaged with the tapered leg of the spring and slidable relative to the leg to adjust the compressive force applied by the spring to the platen. Racket press. (Includes an angled cam surface on each leg of the spring, each cam surface corresponding to the rotation of the spring toward the platen.) A racquet press according to clause 8, which is rotatable into contact with a corresponding bearing surface.