JP2022092817A - Clamp device - Google Patents

Abstract

To make the total volume of a clamp device more compact and achieve weight reduction and a simplified structure.SOLUTION: Biasing force for braking from a spring 7 is transmitted, through a force transmission system, to braked faces 21,21 at both sides of a long guide member 1 for a clamped state. As boosting means W, provided are two plate pieces 31,32 to open and close while being kept in the shape of the Chinese character for "eight".SELECTED DRAWING: Figure 3

Description

The present invention relates to a clamping device, and more particularly to a device for clamping a traveling body that reciprocates linearly.

As a conventional clamp device, as shown in FIGS. 10 and 11, a clamp device 73 fixed to a traveling body 71 such as a crane moving along a rail R with a bolt 72 or the like is known (for example, a patent). See Document 1).
That is, the conventional clamp device 73 shown in FIGS. 10 and 11 is attached to the traveling body 71 moving along the rails R and R, and is provided at the lower ends 75A and 75A of the pair of left and right clamp arms 75 and 75. It is a clamping device that presses and grips the braking member 76 against the side surface 78 of the rail head. Then, the upper end portions 75B and 75B of the pair of left and right clamp arms 75 and 75 are connected via the toggle mechanism 100. Then, the electric cylinder 80 that expands and contracts is arranged in a horizontal posture in parallel with the rail R, and the wedge member 85 is attached to the expansion and contraction operation plunger 82 of the electric cylinder 80, and the wedge member 85 can be freely rolled. Rollers 86, 86 are attached to the above toggle mechanism 100.

As the plunger 82 expands and contracts, the toggle mechanism 100 is opened and closed via the rollers 86 and 86, and the clamp arms 75 and 75 are swung to swing the lower end portions 75A of the clamp arms 75 and 75. , 75A is configured to separate the braking member 76 from the rail head side surface 78.
Moreover, the toggle mechanism 100 has six pivot pins (coaxial shafts) 83 ... and four links 84 ...
It was a complex structure that occupies a large space (volume).

Japanese Patent No. 6650173

The conventional clamp devices shown in FIGS. 10 and 11 described above are (large) clamp devices used for large traveling cranes, etc., but they can be miniaturized to be used for transport devices, machine tools, robots, etc. Even if it is applied to a clamping device, its structure is complicated, it is difficult to save space, and it is extremely difficult to install it in some cases.

Therefore, the present invention is provided so as to project horizontally from one end in the front-rear direction of the traveling body moving along the long guide member, and the urging force output from the output shaft of the actuator is transmitted via the force transmission system. In the clamping device that transmits to the braked surface of the long guide member to keep the traveling body in a stopped state; the boosting mechanism is interposed in the force transmitting system; the boosting mechanism is It has two first and second plate pieces that open and close while maintaining the shape of a figure eight by the reciprocating movement of the output shaft, and the first plate piece and the second plate piece are close to each other. A small concave portion is formed on the opposite side, and the output shaft engages with the small concave portion; further, the outer end sides of the first plate piece and the second plate piece are each spherical seated swing member. The braking grip piece attached to the rocking member was pressed and separated from the braked surface of the long guide member.

Further, the actuator includes a fixed iron core having an electromagnetic coil, a movable iron core, a spring, and an output shaft attached to the movable iron core; the braked surface is the left and right end surfaces in the cross section of the long guide member. Further, side plates are fixed to the left and right via the fixed iron core, and the side plates extend downward from the lower surface of the fixed iron core to face the braked surface of the long guide member. The overall cross-sectional shape is a straddle type; a movable core is arranged on the upper surface side of the fixed core, and the small concave portion engages with the lower end of the output shaft penetrating the vertical hole of the fixed core; Further, a swing member with a spherical seat is provided on the inner surface of the side plate so as to swing freely around the center of the horizontal axis; in the vertically narrow space formed by the lower surface of the fixed iron core and the upper surface of the long guide member. Then, the first plate piece and the second plate piece were stored in a figure eight shape so that the legs could be opened and closed.

Further, the actuator includes a fixed iron core having an electromagnetic coil, a movable iron core, a spring, and an output shaft attached to the movable iron core; the braked surface is the left and right end surfaces in the cross section of the long guide member. Further, side plates are fixed to the left and right via the fixed iron core, and the movable iron core is arranged downward so as to face the fixed iron core; the side plate extends downward from the movable iron core. The long guide member is made to face the braked surface so that the overall cross-sectional shape is a straddle type; and the small concave portion engages with the lower end of the output shaft suspended from the movable iron core; and further, a spherical surface. The seated swing member is provided on the inner surface of the side plate so as to be swingable around the horizontal axis; in the vertically narrow space formed by the lower surface of the movable iron core and the upper surface of the long guide member. The first plate piece and the second plate piece were stored in a figure eight shape so that the legs could be opened and closed.

In addition, it is attached so as to project horizontally from one end in the front-rear direction of the traveling body moving along the long guide member, and the overall cross-sectional shape is a straddle type; the urging force output from the actuator is applied. In the clamping device that transmits the traveling body (2) to the braked surface of the long guide member via the force transmission system to keep the traveling body (2) in a stopped state; the force transmission system has a boosting mechanism. Intervening; the booster mechanism comprises a plurality of pairs of first strip pieces and second strip pieces that intersect in an X shape when viewed from the horizontal front-back direction; and further, the actuator has an electromagnetic coil. A fixed iron core, a movable iron core, a spring, and an output shaft attached to the movable iron core are provided; the braked surface is formed on the left and right end faces in the cross section of the long guide member; and the fixed iron core is used. The left and right side plates are fixed, and the movable iron core is arranged downward so as to face the lower surface of the fixed iron core; the horizontal shape of the movable iron core is rectangular and the left side of the movable iron core is left. The output shaft is vertically installed, and the right output shaft is vertically installed near the right side; further, side plates are fixed to the left and right via the fixed iron core, and the side plates are extended downward to cover the guide member. A swinging member with a spherical seat is provided on the inner surface of the side plate so as to swing around the center of the horizontal axis so as to face the braking surface; the short side of the first strip is on the left output shaft. As it engages, the other short side engages the rocking member on the right side; in the second strip piece, one short side engages the right output shaft and the other short side is on the left side. Engages with the rocking member; the first strip and the second strip that intersect in an X shape in the upper and lower narrow spaces formed by the lower surface of the movable iron core and the upper surface of the long guide member. The tilt angle can be increased or decreased, and it is stored.

According to the clamp device of the present invention, the volume of the entire clamp device can be significantly reduced, and the size and weight can be reduced. Moreover, the overall structure is simple, and the assembly work can be done easily and quickly.

It is a side view which shows one Embodiment of this invention. It is a cross-sectional front view. It is sectional front view which shows the other embodiment. It is a figure explaining the operation, (A) is a figure explaining the main part and a vector of FIG. 3, and (B) is a vector figure. It is explanatory drawing which showed the shape and arrangement relation of the 1st plate piece and the 2nd plate piece. It is a top view which shows another embodiment. It is a cross-sectional front view. It is a cross-sectional front view. It is explanatory drawing of the main part of FIG. 7 and FIG. It is a side view which shows the conventional example. It is a partial cross-sectional front view of the conventional example.

Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
In FIGS. 1 and 2, 1 is a long guide member such as a rail, and 2 is a traveling body (slider) that moves along the long guide member 1 and is a ball (not shown). The traveling body 2 can move back and forth along the long guide member 1 by sliding the bearings and the mutual sliding guide surfaces.

As shown in FIGS. 1 and 2, the clamping device 10 is provided with fasteners 3 and 3 such as bolts so as to project horizontally (to the left in FIG. 1) from one end 2A in the front-rear direction of the traveling body 2. The side plates 5 and 5 provided on the left and right are fixed.
A part of the side plates 5 and 5 serves as a "bracket" for connecting and integrating the traveling body 2 and the clamp device 10.

In FIG. 2, the actuator 4 includes a fixed iron core 11 having an electromagnetic coil 6, a movable iron core 12, a spring 7 for urging the movable iron core 12 in a direction away from the fixed iron core 11, and an output attached to the movable iron core 12. A shaft 8 is provided.
On the other hand, the braked surface 21 is formed on the left and right end surfaces in the cross section of the long guide member 1.

Then, the left and right side plates 5 and 5 are fixedly fixed via the fixed iron core 11. Moreover, the left and right side plates 5 and 5 extend downward from the lower surface 11A of the fixed iron core 11 and face the braked surface 21 of the long guide member 1. That is, the side plates 5 and 5 have an inner surface of the hanging portion 5A extending downward from the lower surface 11A of the fixed iron core 11 so as to face the braked surface 21.
Then, as is clear from FIG. 2, the fixed iron core 11 and the left and right side plates 5 (the hanging portion 5A) make the entire cross-sectional shape a straddle type and straddle the long guide member 1.

Further, the movable iron core 12 is arranged on the upper surface side of the fixed iron core 11. The output shaft (push shaft) 8 fixed to the movable core 12 is passed through the holes 13 in the vertical direction provided in the center of the left and right of the fixed core 11.
At the lower end of the output shaft (push shaft) 8, two first plate pieces 31 and second plate pieces 32 that open and close while maintaining a figure of eight are engaged and connected in an interlockable manner. That is, if the output shaft 8 operates downward, the first plate piece 31 and the second plate piece 32 swing in the open leg direction.
As shown in FIG. 2, an swing member 15 with a spherical seat 14 that can swing around the horizontal axis L ₁ is provided on the inner surface of the hanging portion 5A of the side plate 5.

Further, more specifically, in the present invention, the urging force output from the output shaft 8 of the actuator 4 is transmitted to the braked surface 21 of the long guide member 1 via the force transmission system. It is a clamp device that keeps the traveling body 2 in a stopped state. Moreover, a boosting mechanism W is interposed in the force transmission system. The boosting mechanism W has the output shaft 8 and the two first plate pieces 31 and the second plate pieces 32 that open and close the legs while maintaining the shape of a figure eight by the reciprocating movement of the output shaft 8. Configured.

Here, in the present invention, the "closed legs" of the first plate piece 31 and the second plate piece 32, which act as the operation of opening and closing the legs, will be described. As shown in FIG. 4 (A) (described later), since the legs are opened and closed with an opening / closing angle β of 160 ° ≦ β ≦ 178 °, the closing angle βmin = 160 °. Therefore, in the present invention, the "closed leg" refers to the state of the minimum angle βmin formed by the opening / closing operation.

Further, as shown in FIG. 5, small concave portions 31C and 32C are formed in the centers of the adjacent opposite sides 31B and 32B of the first plate piece 31 and the second plate piece 32, and the small concave portions 31C, The output shaft 8 engages with 32C (see FIGS. 2 and 3).

Then, the outer end side 31A of the first plate piece 31 and the outer end side 32A (see FIG. 5) of the second plate piece 32 each engage with the upper half portion of the swing member 15, and the upper half portion thereof. By pressing, it swings around the spherical seat 14, and the braking grip piece 16 attached to the lower half portion of the swing member 15 can be freely pressed against the braked surface 21 of the long guide member 1.

Reference numeral 18 is a restoration spring, and when the electromagnetic coil 6 is turned off, the first plate piece 31 and the second plate piece 32 are closed, and accordingly, the restoration spring 18 swings with the elastic force. The member 15 is swung to separate the braking grip piece 16 from the braked surface 21.
Then, as shown in FIG. 2, the first plate piece 31 and the second plate piece 32 are formed in the upper and lower narrow spaces H formed by the lower surface 11A of the fixed iron core 11 and the upper surface 1A of the long guide member 1. It is stored so that it can be opened and closed while maintaining its shape.

Next, FIG. 3 shows another embodiment of the present invention, in which the actuator 4 is attached to a fixed iron core 11 having an electromagnetic coil 6, a movable iron core 12 provided below the fixed iron core 11, a spring 7 and a movable iron core 12. It is provided with a downwardly projecting output shaft 8.

Further, the point that the braked surfaces 21 and 21 are provided on the left and right end faces in the cross section of the long guide member 1 is the same as that of the embodiment of FIG. Further, side plates 5 and 5 are fixed to the left and right via the fixed iron core 11, and the movable iron core 12 is arranged in a face-to-face manner below the fixed iron core 11.
The side plates 5 and 5 extend downward from the movable iron core 12 to form the hanging portions 5A and 5A. The hanging portion 5A faces the braked surface 21 of the long guide member 1. Similar to FIG. 4, even in FIG. 3, the overall cross-sectional shape is a straddle type straddling the long guide member 1.

Then, at the lower end of the output shaft 8 suspended from the movable iron core 12, the two first plate pieces 31 and the second plate pieces 32 that open and close the legs while maintaining the shape of a figure eight are interlocked with each other. connect.
That is, if the output shaft 8 operates downward, the first plate piece 31 and the second plate piece 32 swing in the open leg direction.
Further, the point that the swing member 15 with the spherical seat 14 is provided on the inner surface of the hanging portion 5A of the side plate 5 is the same as the configuration described with reference to FIG.

Further, the small concave portions 31C and 32C of the first plate piece 31 and the second plate piece 32 shown in FIG. 5 are engaged with the lower end of the output shaft 8 suspended from the movable iron core 12.
The swing member 15 with the spherical seat 14 swings around the horizontal axis L ₁ , and the braking grip piece 16 attached to the lower end thereof is pressure-welded and separably pressed against the surface to be braked 21 to clamp (brake). Keep in state.

As described above, in the embodiment of FIG. 3, the first plate piece 31 and the first plate piece 31 are formed in the vertically narrow space H formed by the lower surface 12A of the movable iron core 12 and the upper surface 1A of the long guide member 1. Two plate pieces 32 are stored in a figure eight shape so that they can be opened and closed.

Next, the shapes, arrangements, postures, actions, functions, and the like of the first and second plate pieces 31 and 32 used in the respective embodiments of FIGS. 2 and 3 will be described. First, as shown in FIG. 5, the first plate piece 31 and the second plate piece 32 are substantially rectangular plate pieces, respectively, and are located at the center of the facing sides 31B and 32B which are close to each other and correspond to each other in parallel. As described above, the points where the small concave portions 31C and 32C into which the output (drive) shaft 8 is inserted are formed, include the inner peripheral edge of the small concave portions 31C, and the cross section of the entire peripheral edge. The shape is preferably semi-circular. That is, the semi-circular cross-sectional shape as shown in FIGS. 4 (A) and 2 and 3 can be smoothly slidable on the upper half corner of the output shaft 8 and the swing member 15. There is.

Next, FIG. 4 (A) shows the main part of FIG. 3 (and FIG. 2), and the downward vector (force) F ₈ is formed by the output shaft 8 into two first and second plate pieces. It is shown whether remarkably large vectors F ₃₁ and F ₃₂ are generated in the first and second plate pieces 31 and 32, respectively, when they are applied to the small concave portions 31C and 32C of 31 and 32.

As shown in FIG. 4 (and FIG. 3 or FIG. 2), the angle θ formed by each of the first plate piece 31 and the second plate piece 32 forming a figure eight with each other as the horizontal plane (horizontal line) _PH is , 1 ° ≤ θ ≤ 10 ° under the final open leg state. Preferably, the dimensions of each component are set so that 2 ° ≤ θ ≤ 5 °. In this final open leg state, if the angle formed by the vector F ₃₁ and the vector F ₃₂ is β, then 160 ° ≦ β ≦ 178 °, which is extremely close to 180 ° (straight line).
The boosting mechanism W shown in FIG. 4 therefore uses the vector F ₈ of the output shaft 8 as the large vectors F ₃₁ and F ₃₂ (for example, 10 times or more) (boost), and the spherical seated rocking member 15 Can be transmitted to.

In each of the embodiments of FIGS. 2 and 3, the rocking member 15 has a function of only converting a force (vector) in the horizontal outward direction into a force (vector) in the horizontal inward direction ─── that is, 1 Shows a boost of 1 ───. By moving (setting) the position of the horizontal axis L ₁ of the swing member 15 upward, it is also free to give a boosting function by the lever.

Next, still another embodiment of the present invention shown in FIGS. 6 to 9 will be described below.
Similar to the above-described embodiment, the overall cross-sectional shape is a straddle type. A clamp that transmits the urging force output from the actuator 4 to the braked surfaces 21 and 21 of the long guide member 1 via the force transmission system to keep the traveling body 2 (see FIG. 1) in a stopped state. It is a device.

The boosting mechanism W interposed in this force transmission system will be described below.
This booster mechanism W includes a first band plate piece 41 and a second band plate piece 42 that intersect in an X shape when viewed from the horizontal front-rear direction (as shown in FIG. 9A).

In FIG. 9A, the first strip piece 41 is shown by a solid line, and the second strip piece 42 is shown by a broken line (for easy distinction).
As shown in FIG. 9B, the first strip piece 41 and the second strip piece 42 have an elongated rectangular shape, respectively, and the short sides 41A and 42A have small concave portions 41C and 42C, respectively. Is formed, and the other short sides 41B and 42B are straight.

Further, as shown in FIGS. 7 and 8, the actuator 4 includes a fixed iron core 11 having an electromagnetic coil 6, a movable iron core 12 provided below the fixed core 11, a spring 7, and an output shaft 8 attached to the movable iron core 12. To prepare.
The braked surfaces 21 and 21 of the long guide member 1 are formed on the left and right end surfaces in the cross section of the long guide member 1.

Further, the left and right side plates 5 and 5 are fixed via the fixed iron core 11, and the movable iron core 12 is arranged downward so as to face the lower surface 11A of the fixed iron core 11.
Moreover, as shown in the plan view of FIG. 6, the plan shape of the fixed core 11 and the movable core 12 is rectangular, and the rectangular plate-shaped movable core 12 is located closer to the left side 12L (of the upper side and the lower side). (Nearby) Two left output shafts 8L and 8L are installed vertically. Further, on the right side 12R side, two right output shafts 8R and 8R are vertically installed near the center of the movable iron core 12 (planar rectangular shape) in the longitudinal direction.

In FIG. 6, with respect to the (Y ₁₂ -Y ₁₂ ) axis in the longitudinal direction passing through the center point O ₁₂ of the movable iron core 12 having a rectangular shape in a plan view, two left output shafts 8L and 8L are arranged on the left side. , The same number (two) of right output shafts 8R and 8R are arranged on the right side, and the distance from the (Y ₁₂ -Y ₁₂ ) axis is also the same.
Further, with respect to the (X ₁₂ -X ₁₂ ) axis in the left-right width direction passing through the center point O ₁₂ (in FIG. 6), the two left output shafts 8L and 8L are arranged line-symmetrically and the two right are arranged. The output shafts 8R and 8R are arranged line-symmetrically.

As will be described later, when the urging force (lower vector) is evenly applied to the strip pieces 41, 42 from the four output shafts 8L, 8L, 8R, 8R, the movable iron core 12 is surface-wise. Balance and maintain horizontal posture.

Further, as shown in FIGS. 7 and 8, similarly to the embodiments of FIGS. 2 and 3 described above, the side plates 5 are fixed to the left and right via the fixed iron core 11, and the side plates 5 extend downward. A spherical seated swing member 15 is provided on the inner surface of the side plate 5 so as to swing around the horizontal axis L ₁ so as to face the braked surface 21 of the guide member 1.

Then, as shown in FIGS. 6 to 9, in the first band plate piece 41, one short side 41A engages with the left output shaft 8L. In FIG. 6, the rectangular movable iron core 12 is arranged near the upper side and the lower side.
Further, the other short side 41B of the first strip piece 41 engages with the swing member 15 on the right side.

In the second strip piece 42, one short side 42A engages with the right output shaft 8R, and the other short side 42B engages with the left swing member 15 (see FIG. 8). In FIG. 6, two second strip pieces 42, 42 are arranged in the upper and lower intermediate regions of the rectangular movable iron core 12.

Comparing FIGS. 6 and 9 with FIGS. 2, 3, and 4, in the embodiments shown in FIGS. 6 and 9, it is easy to set the distance between the left and right side plates 5 and 5 to be small, and therefore the length is long. It is suitable when the width dimension of the scale guide member 1 is small.

Then, as shown in FIGS. 7 and 8, the upper and lower narrow spaces H formed by the lower surface 12A of the movable iron core 12 and the upper surface 1A of the long guide member 1 intersect in an X shape (without a pivot pin). Each inclination angle θ (with respect to the horizontal plane) of the first band plate piece 41 and the second band plate piece 42 is stored so that it can be increased or decreased.

Next, the tilted postures, actions, functions, and the like of the first and second strip pieces 41 and 42 used in the embodiments of FIGS. 6 to 9 will be additionally described. First, the cross-sectional shapes of one of the short sides 41A and 42A of the strip pieces 41 and 42 shown in FIG. 9B, the other short sides 41B and 42B, and the small concave portions 41C and 42C are semicircular. It is desirable to do so because it can swing smoothly with respect to the mating member (engaged portion).

Next, as shown in FIG. 9A, the downward force is applied to the two first and second strip pieces 41 and 42 crossed in an X shape by the two output shafts 8L and 8R. If so, the resultant force vector ₍ the sum of them) can be indicated by F8. That is, the small resultant force vector F ₈ downward from the intersection of the two first and second strip pieces 41 and 42 is a significantly large vector F along the first and second strip pieces 41 and 42. It is shown that it is divided into ₄₁ and F ₄₂ and transmitted to the swing member 15 (not shown).

In FIG. 9, the angle formed by each of the first and second strip pieces 41 and 42 with the horizontal plane (horizontal line) _PH is 1 ° ≤ θ ≤ 10 ° under the final open leg state (clamped state). And. Preferably, the dimensions of each component are set so that 2 ° ≤ θ ≤ 5 °. In this final open leg state, if the angle formed by the vectors F ₄₁ and F ₄₂ is β, then 160 ° ≦ β ≦ 178 °, which is extremely close to 180 ° (straight line).
The boosting mechanism W shown in FIG. 9A therefore has a spherical surface with the resultant force vectors F ₈ of the output shafts 8L and 8R as large vectors F ₄₁ and F ₄₂ (for example, 10 times or more). It can be transmitted to the swing member 15 with a seat.

The clamping device is a type that always clamps to the braking state by the force of the spring 7 (negative type) ───, see FIGS. 3, 7, and 8───, and braking by the force generated from the electromagnetic coil 6. A type that clamps to a state (positive type) ─── see Fig. 2 ─── is well known. The present invention can be freely applied to both negative and positive types.

As described in detail above, the present invention is attached so as to project horizontally from one end 2A in the front-rear direction of the traveling body 2 moving along the long guide member 1, and is output from the output shaft 8 of the actuator 4. In the clamping device that transmits the urging force to the braked surface 21 of the long guide member 1 via the force transmission system to keep the traveling body 2 in a stopped state; A boosting mechanism W is interposed; the boosting mechanism W has two first plate pieces 31 and a second plate piece that open and close while maintaining a figure eight shape by the reciprocating movement of the output shaft 8. 32, small concave portions 31C, 32C are formed on the adjacent facing sides 31B, 32B of the first plate piece 31 and the second plate piece 32, and the output shaft 8 has the small concave portions 31C, 32C. The outer end sides 31A and 32A of the first plate piece 31 and the second plate piece 32 are respectively engaged with the spherical seated swing member 15 and attached to the swing member 15. Since the braking grip piece 16 is configured to be press-separable from the braked surface 21 of the long guide member 1, it is possible to significantly reduce the size, reduce the weight, and operate the braking grip piece 16. It's smooth. Therefore, it can be widely applied to a transport device, a transport machine, a machine tool, a robot, etc. equipped with a traveling body that reciprocates in a straight line. In particular, the boosting mechanism W can omit the pin (shaft) connecting the plate piece 31 and the plate piece 32, the structure can be simplified, the volume can be reduced, and the plate piece 32 can be easily attached to the traveling body.

Further, the actuator 4 includes a fixed iron core 11 having an electromagnetic coil 6, a movable iron core 12, a spring 7, and an output shaft 8 attached to the movable iron core 12; the braked surface 21 is long. It is formed on the left and right end faces in the cross section of the guide member 1; further, side plates 5 and 5 are fixed to the left and right via the fixed iron core 11, and the side plates 5 and 5 are located below the lower surface 11A of the fixed iron core 11. The long guide member 1 is extended to face the object to be braked 21, and the overall cross-sectional shape is made a straddle type; the movable iron core 12 is arranged on the upper surface side of the fixed iron core 11 and the fixed iron core is arranged. The small concave portions 31C and 32C are engaged with the lower end of the output shaft 8 penetrating the vertical hole 13 of 11; further, the spherical seated swing member 15 is mounted on the inner surface of the side plates 5 and 5 as a horizontal shaft. The first plate piece 31 and the second piece 31 are provided in a vertically narrow space H formed by the lower surface 11A of the fixed iron core 11 and the upper surface 1A of the long guide member 1 so as to be swingable around the center L ₁ . Since the plate piece 32 can be opened and closed in a figure eight shape and stored, the vertical dimensions are significantly reduced, the size is reduced, and the plate piece 32 can be installed in a stable posture. Compared with the conventional toggle mechanism 100 shown in FIG. 11, the number of parts is significantly reduced, and the structure can be simplified, compacted, and the assembly work can be facilitated. In addition, the failure rate can be significantly reduced.

Further, the actuator 4 includes a fixed iron core 11 having an electromagnetic coil 6, a movable iron core 12, a spring 7, and an output shaft 8 attached to the movable iron core 12; the braked surface 21 is long. It is formed on the left and right end faces in the cross section of the guide member 1. Further, the side plates 5 and 5 are fixed to the left and right via the fixed iron core 11, and the movable iron core 12 is arranged below the fixed iron core 11 so as to face each other. The side plate 5 extends downward from the movable iron core 12 and faces the braked surface 21 of the long guide member 1 to make the entire cross-sectional shape a straddle type; and hangs down from the movable iron core 12. The small concave portions 31C and 32C are engaged with the lower end of the provided output shaft 8; further, the swing member 15 with a spherical seat swings on the inner surface of the side plates 5 and ₅ around the horizontal axis L1. The first plate piece 31 and the second plate piece 32 are formed in a figure eight in the upper and lower narrow space H formed by the lower surface 12A of the movable iron core 12 and the upper surface 1A of the long guide member 1. Since it is configured so that it can be opened and closed in a shape, the vertical dimensions are significantly reduced, it is compact, and it can be installed in a stable posture. The number of parts can be significantly reduced. It has the advantages of a simple structure, easy assembly work, long life, and resistance to failure.

Further, it is attached so as to project horizontally from one end 2A in the front-rear direction of the traveling body 2 moving along the long guide member 1, and the entire cross-sectional shape is a straddle type; output from the actuator 4. In the clamping device that transmits the urging force to the braked surface 21 of the long guide member 1 via the force transmission system to keep the traveling body 2 in a stopped state; A boosting mechanism W is interposed; the boosting mechanism W is provided with a plurality of pairs of a first band plate piece 41 and a second band plate piece 42 that intersect in an X shape when viewed from the horizontal front-back direction; The actuator 4 includes a fixed iron core 11 having an electromagnetic coil 6, a movable iron core 12, a spring 7, and an output shaft 8 attached to the movable iron core 12; the braked surface 21 is a long guide member. It is formed on the left and right end faces in the cross section of No. 1; moreover, the left and right side plates 5 and 5 are fixed via the fixed iron core 11, and the movable iron core 12 is arranged downward on the lower surface 11A of the fixed iron core 11 so as to face each other. The horizontal shape of the movable iron core 12 is rectangular, and the left output shaft 8L is vertically installed near the left side 12L of the movable iron core 12, and the right output shaft 8R is vertically installed near the right side 12R; The side plates 5 are fixed to the left and right via the fixed iron core 11, and the side plates 5 extend downward to face the braked surface 21 of the guide member 1, and the spherical seated rocking member 15 is formed. The inner surface of the side plate 5 is swingably provided around the horizontal axis L1; in the _first band plate piece 41, one short side 41A engages with the left output shaft 8L and the other short side. Side 41B engages the rocking member 15 on the right side; in the second strip piece 42, one short side 42A engages the right output shaft 8R and the other short side 42B swings on the left side. Engages with the member 15; with the first strip piece 41 intersecting in an X shape in the upper and lower narrow space H formed by the lower surface 12A of the movable iron core 12 and the upper surface 1A of the long guide member 1. Since the inclination angle θ of the second strip piece 42 can be increased or decreased and stored, the distance between the side plates 5 and the side plates 5 can be reduced to further reduce the overall width dimension. As a result, even when the width dimension of the long guide member 1 is small, a strong clamping force can be exerted, and the ability of the sufficiently large boosting mechanism W can be exerted while the vertical dimension remains small.

1 Long guide member 1A Top surface 2 Traveling body 2A Front-back direction one end 4 Actuator 5 Side plate 6 Electromagnetic coil 7 Spring 8 Output shaft 8L Left output shaft 8R Right output shaft
11 Fixed iron core
11A Bottom surface
12 Movable iron core
12A bottom surface
12L left side
12R right side
13 holes
15 Swing member with spherical seat
16 Braking grip piece
21 Braked surface
31 1st plate piece
31A outer edge
31B Opposite side
31C small concave part
32 Second plate
32A outer edge
32B Opposite side
32C small concave part
41 1st strip
41A One short side
41B The other short side
42 2nd strip
42A One short side
42B The other short side H Vertical narrow space L ₁ Horizontal axis W Boosting mechanism θ Tilt angle

Claims (4)

It is attached so as to project horizontally from one end (2A) in the front-rear direction of the traveling body (2) moving along the long guide member (1), and is output from the output shaft (8) of the actuator (4). In the clamping device, the urging force is transmitted to the braked surface (21) of the long guide member (1) via the force transmission system to keep the traveling body (2) in the stopped state.
A boosting mechanism (W) is provided in the force transmission system.
The booster mechanism (W) has two first plate pieces (31) and a second plate piece (32) that open and close legs while maintaining a figure eight shape by the reciprocating movement of the output shaft (8). A small concave portion (31C) (32C) is formed on the adjacent opposite sides (31B) (32B) of the first plate piece (31) and the second plate piece (32), and the output shaft is formed. (8) engages with the small concave portions (31C) and (32C).
Further, the outer end sides (31A) (32A) of the first plate piece (31) and the second plate piece (32) are engaged with the spherical seated rocking member (15), respectively, and the rocking member is engaged with the rocking member (15). A clamp device characterized in that the braking grip piece (16) attached to (15) is pressed and separated from the braked surface (21) of the long guide member (1). The actuator (4) has a fixed core (11) having an electromagnetic coil (6), a movable core (12), a spring (7), and an output shaft (8) attached to the movable core (12). Prepare,
The braked surface (21) is formed on the left and right end surfaces in the cross section of the long guide member (1).
Further, side plates (5) and (5) are fixed to the left and right via the fixed core (11), and the side plates (5) and (5) extend downward from the lower surface (11A) of the fixed core (11). Then, the long guide member (1) is made to face the braked surface (21), and the overall cross-sectional shape is made into a straddle type.
A movable core (12) is arranged on the upper surface side of the fixed core (11), and the small concave portion (8) at the lower end of the output shaft (8) penetrating the vertical hole (13) of the fixed core (11). 31C) (32C) engage and
Further, a swing member (15) with a spherical seat is provided on the inner surface of the side plates (5) and (5) so as to be swingable around the horizontal axis (L ₁ ).
In the vertical narrow space (H) formed by the lower surface (11A) of the fixed iron core (11) and the upper surface (1A) of the long guide member (1), the first plate piece (31) and the second plate piece (31) and the second. The clamp device according to claim 1, wherein the plate piece (32) is housed so that the legs can be opened and closed in a figure eight shape. The actuator (4) has a fixed core (11) having an electromagnetic coil (6), a movable core (12), a spring (7), and an output shaft (8) attached to the movable core (12). Prepare,
The braked surface (21) is formed on the left and right end surfaces in the cross section of the long guide member (1).
Further, the side plates (5) and (5) are fixed to the left and right via the fixed core (11), and the movable core (12) is arranged below the fixed core (11) so as to face each other.
The side plate (5) extends downward from the movable iron core (12) to face the braked surface (21) of the long guide member (1), and the overall cross-sectional shape is a straddle type. ,
The small concave portions (31C) and (32C) are engaged with the lower end of the output shaft (8) vertically hung from the movable iron core (12).
Further, the swing member (15) with a spherical seat is provided on the inner surface of the side plates (5) and (5) so as to be swingable around the horizontal axis (L ₁ ).
In the vertical narrow space (H) formed by the lower surface (12A) of the movable iron core (12) and the upper surface (1A) of the long guide member (1), the first plate piece (31) and the second plate piece (31) and the second. The clamp device according to claim 1, wherein the plate piece (32) is housed so that the legs can be opened and closed in a figure eight shape. It is attached so as to project horizontally from one end (2A) in the front-rear direction of the traveling body (2) moving along the long guide member (1), and the overall cross-sectional shape is a straddle type.
The urging force output from the actuator (4) is transmitted to the braked surface (21) of the long guide member (1) via the force transmission system to keep the traveling body (2) in a stopped state. In the clamping device
A boosting mechanism (W) is provided in the force transmission system.
The boosting mechanism (W) includes a plurality of pairs of first strip pieces (41) and second strip pieces (42) that intersect in an X shape when viewed from the horizontal front-back direction.
Further, the actuator (4) includes a fixed iron core (11) having an electromagnetic coil (6), a movable iron core (12), a spring (7), and an output shaft (8) attached to the movable iron core (12). , Prepare,
The braked surface (21) is formed on the left and right end surfaces in the cross section of the long guide member (1).
Moreover, the left and right side plates (5) and (5) are fixed via the fixed core (11), and the movable core (12) is arranged downward on the lower surface (11A) of the fixed core (11) so as to face each other. Set up
The planar shape of the movable iron core (12) is rectangular, and the left output shaft (8L) is vertically installed near the left side (12L) of the movable iron core (12), and the right output shaft (8L) is placed near the right side (12R). 8R) is erected and
Further, side plates (5) are fixed to the left and right via the fixed iron core (11), and the side plates (5) extend downward to the braked surface (21) of the guide member (1). A swing member (15) with a spherical seat is provided on the inner surface of the side plate (5) so as to swing around the horizontal axis (L ₁ ) so as to face each other.
In the first strip piece (41), one short side (41A) engages with the left output shaft (8L), and the other short side (41B) engages with the right swing member (15). Match,
In the second strip piece (42), one short side (42A) engages with the right output shaft (8R), and the other short side (42B) engages with the left swing member (15). Match,
The first strip that intersects in an X shape in the vertical narrow space (H) formed by the lower surface (12A) of the movable iron core (12) and the upper surface (1A) of the long guide member (1). A clamp device characterized in that the tilt angle (θ) of the piece (41) and the second strip piece (42) can be increased or decreased and stored.

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