JPH0221465B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a wire clamp device that is attached to, for example, a wire traction machine and is capable of gripping or releasing a wire.

Purpose The first invention of this application is capable of smoothly and reliably gripping or releasing a wire, and when the clamp device is held in the released state with no wire inserted. It is possible to avoid the problem of the gripping body falling in the gripping direction, disrupting the arrangement of the rotating bodies and preventing both gripping bodies from opening/closing, and also allowing the wire to be inserted into the clamp device without being hindered by the gripping body. An object of the present invention is to provide a wire clamping device that can be used.

Further, an object of the second invention of this application is to ensure that the movable grip body engages with the wire by providing an elastic member that always biases the movable grip body in the gripping direction, thereby preventing the wire from falling off. In addition, it is possible to put the clamp device in the released state and insert the wire between the two gripping bodies by simply rotating the set lever from the non-operating position to the operating position against the biasing force of the elastic member. Then, when the set lever in the operating position is released, the set lever automatically returns to the original non-operating position, and the clamping device is returned to the gripping state to securely grip the wire inserted between the two gripping bodies. The purpose of the present invention is to provide a wire clamp device that can perform the following tasks.

First Embodiment Hereinafter, a first embodiment in which the present invention is embodied in a wire traction machine will be described based on the drawings.

As shown in Figs. 1 to 5, the case 1 of this wire traction machine consists of two case plates 2 of similar shape, and both case plates 2 are assembled in an overlapping state by front bolts 3 and rear bolts 4. ing. A front opening 5 is transparently provided in the center of the front of the case 1, and a wide part 6 is provided at the front end of the upper surface.
An upper front opening 7 and an upper rear opening 8 are respectively formed. Further, a hook 9 is rotatably supported on the front bolt 3, and the tip thereof is exposed to the outside of the case 1 through the front opening 5. And when using this wire towing machine,
As shown in FIG. 1, this hook 9 is adapted to be hung at a suitable mounting location A at the work site.

As shown in FIGS. 3 and 5, two support arms 10 are rotatably supported by the front bolt 3 on the outside of the hook 9, and a support shaft 11 inserted between the rear ends of the support arms 10 can move forward. An operating lever 12 is pivoted. This forward operation lever 12 has a thick wall portion 13 at the base end.
and a handle fitting part 14 at the tip, and the thick part 13 has a wire insertion hole 15 through which the wire W is inserted (see Fig. 3), and the tip of the handle fitting part 14. protrudes to the outside of the case 1 through the upper front opening 7.

A pair of long and short pins 16 and 17 are provided protruding from both sides of the support shaft 11 on both outer surfaces of the thick part 13, and the long pin 16 on the handle fitting part 14 side is shown in FIG. As shown, two external support plates 18 extending along the longitudinal direction of the case 1 are connected to each other. These external support plates 18
A through hole 19 extending in the longitudinal direction is formed in the central portion of the guide, and a guide portion 20 is bent inward at the lower edge of the rear end. As the forward operation lever 12 is rotated, the long pin 16 is rotated about the support shaft 11, and the external support plate 18 is reciprocated back and forth along the longitudinal direction of the case 1.

As shown in FIG. 5, two internal support plates 21 are arranged inside this external support plate 18, and are connected to the short pin 17 of the forward operation lever 12 via a connecting link 22 at the upper edge of the front end thereof. ing. A sliding piece 23 that slides on the guide portion 20 of the external supporting plate 18 is formed protruding from the rear end of the internal supporting plate 21, and a sliding piece 23 that slides on the guide portion 20 of the external supporting plate 18 is formed in a protruding manner.
A long hole 25 through which the guide pin 24 inserted between
is transparent. Then, the forward operation lever 12
When the internal support plate 21 is guided by the guide portion 20 and the guide pin 24,
The external support plate 18 is reciprocated back and forth in the opposite direction.

A rear short lever 28 is attached to a pair of front and rear pins 26 and 27 fixed between the rear end portions of the external support plate 18.
Two rear length levers 29 are rotatably supported, and connecting holes 30 are formed at equidistant positions between the levers 28 and 29, respectively. A rear clamping device 31 is attached to each of these rear levers 28 and 29, and a pair of lower caulking pins 32 of the rear clamping device 31 are rotatably fitted into each of the connecting holes 30. is slightly swung back and forth parallel to the external support plate 18.

Similarly, a front clamp device 35 is attached to the internal support plate 21 by front long and short levers 33 and 34. Therefore, when the forward operation lever 12 is rotated, both the clamp devices 31 and 35 are moved closer to or separated from each other as the outer support plate 18 and the inner support plate 21 move back and forth in different directions. It's summery.

A wire lead-out gutter 36 is obliquely fixed to one case plate 2 within the wide portion 6 of the upper front opening 7, and a wire lead-out gutter 36 is fixed to the upper surface of the proximal end of the hook 9 so as to face the lead-out gutter 36. Wire guide trough 37
is provided. The wire W introduced from the wire introduction port 38 formed on the rear end surface of the case 1 is connected to the rear clamp device 31 and the front clamp device 3.
5 and the wire insertion hole 15 of the forward operation lever 12, the wire is guided by the wire guide trough 37 and the wire lead-out trough 36, and led out of the case 1 from the front opening 5.

Next, the configuration of both the front and rear clamp devices 35, 31 will be described in detail. Since both the clamp devices 35, 31 have the same configuration except for some parts to be described later, the front clamp device 35 will be explained.

A pair of guide bodies 42 are sandwiched between the two side plates 41 having similar shapes on both upper and lower sides.
It is fixed by the lower caulking pin 32 and the upper caulking pin 43 which are inserted through the. Both guides 4
Fixed inclined surfaces 44 that approach each other toward the rear are formed on opposing end surfaces of the two, and a stepped portion 45 is provided protruding from the front portion of the fixed inclined surfaces 44. As shown in FIG. 6, the lower crimping pin 32 is longer than the upper crimping pin 43, and the aforementioned front long and short levers 33 and 34 are fitted to both ends thereof protruding from the outer surface of the side plate 41. has been done.

A pair of wedge-shaped grips 4 are provided between the upper and lower guide bodies 42.
6 are disposed so as to be movable back and forth and up and down, and grip recesses 47 each having a semicircular cross section for gripping the wire W are formed on their opposing end faces, and the aforementioned A movable inclined surface 48 is formed parallel to the fixed inclined surface 44. Furthermore, a front inclined surface 49 and a rear inclined surface 50 are formed on the front and rear end surfaces of the gripping body 46, respectively, so as to project upwardly and downwardly. In addition, 40 in the figure is a step provided on the outer surface of the rear end of the grip body 46, and the guide body 42
It faces the stepped portion 45 of.

A plurality of rollers 51 as rotating bodies are rotatably sandwiched between the fixed inclined surface 44 of the guide body 42 and the movable inclined surface 48 of the gripping body 46.
As shown in the figure, when the longitudinal length of the gap between both inclined surfaces 44 and 48 is the longest, there is a predetermined gap between the roller 51 at the frontmost end and the stepped portion 45 of the guide body 42. 52 is formed. Therefore, when the gripping bodies 46 are moved to open, which will be described later, each roller 51 is allowed to move forward while being held between the inclined surfaces 44 and 48, as shown in FIG. .

This front clamping device 35 as shown in FIG.
A clamping metal fitting 53 is attached so as to be movable back and forth so as to sandwich the center portion of both side plates 41. This clamping fitting 53 has a pair of leg pieces 54 that extend opposite each other.
and a connecting plate 55 for connecting the rear ends of both leg pieces 54, and a fitting protrusion 56 is formed on the outer surface of the rear end of both leg pieces 54, and as shown in FIG. It fits into a long hole 57 transparently provided in the center of the lever 33. A wire insertion hole 58 is provided in the center of the connecting plate 55, and a pair of spring fitting recesses 59 are formed on the inner surfaces of both upper and lower sides thereof.

Note that, unlike the front clamp device 35, in the rear clamp device 31, as shown in FIG. The wire W introduced from the wire introduction port 38 of No. 1 is smoothly guided into the rear clamp device 31.

As shown in FIG. 6, a front isolator 62 is fixed between the leg pieces 54 at the front end of the clamping fitting 53 by a pair of caulking pins 61, and both ends of the front isolator 62 are formed at the center of the front ends of the side parts 41. It fits into the notch 63. A wire insertion hole 64 is provided in the center of the front isolator 62, and an isolating inclined surface 65 is formed on the rear surface to be connected to the front inclined surface 49 of the gripping body 46.

On the other hand, at the rear end of the clamping fitting 53, both leg pieces 5
A rear separator 66 as a movable separator is interposed between the connecting plate 55 and both grips 46 so as to be able to move back and forth slightly, and both ends of the rear separator 66 are connected to the rear ends of the side plates 41. It is fitted into the notch 67 formed. In the rear isolation body 66, a wire insertion hole 68 is provided in the center thereof, and an isolating inclined surface 69 is formed on the front surface thereof to join with the rear inclined surface 50 of the gripping body 46. As shown in FIG.
0 is formed.

A compression spring 71 as a biasing member is interposed between the rear separator 66 and the connecting plate 55, with both ends fitted into the spring recesses 59 and 70.
The spring force always urges the rear separator 66 forward. Therefore, since both the gripping bodies 46 are held by the front and rear separators 62 and 66 with spring force, they are moved outwardly by the action of the respective inclined surfaces 49, 50, 65, and 69 that connect to each other. Once energized.

Next, with respect to the front and rear clamping devices 35 and 31 configured in this manner, the wire gripping/releasing action and wire permitting/return checking action will be described with reference to FIGS. 7 to 9.

FIG. 7 shows the front clamping device 35 in a state where both gripping bodies 46 grip the wire W when the wire is inserted.
This shows that. When the clamping metal fitting 53 is moved forward in this state, the front isolation body 62 is moved forward, and the forward movement of both gripping bodies 46 is permitted. Therefore, both the gripping bodies 46 are pushed by the rear separator 66 and are moved forward in an open state while being guided by the fixed inclined surface 44 of the guide body 42 while rolling the rollers 51.
The distance between the two gripping recesses 47 is gradually expanded, and the front clamp device 35 enters an open state in which the wire W can be inserted and moved.

As is clear from comparing FIG. 7 and FIG. 8, in this released state, the rear separator 66 enters into the space between the rear ends of the two grips 46 that are isolated from each other due to the spring force of the compression spring 71. Therefore, the connecting plate 55
and the rear separator 66 is slightly enlarged. In addition, in this released state, both gripping bodies 46 press each roller 51 against the guide body 42 due to the spring force of the compression spring 71, so even when the wire W is not inserted, the upper gripping body 46 is pressed by its own weight. There is no risk of the rollers falling and disturbing the arrangement of the upper rollers 51.

Next, when the clamping fitting 53 is moved rearward in this released state, both the gripping bodies 46 are pushed rearward by the front isolation body 62.
6 are guided to the fixed inclined surface 44 of the guide body 42 via each roller 51, and are each moved inward and closed obliquely. Therefore, as shown in FIG. 7, the wire W is gripped again between both gripping recesses 47, and the front clamp device 35 returns to the gripping state.

By the way, in addition to the gripping and releasing functions described above, the clamping devices 31 and 35 also allow the inserted wire W to move forward and prevent it from moving backward when both the gripping bodies 46 are closed. It has a permissive and anti-reversal effect.

Therefore, both of these effects will be explained based on FIG. 9. For illustration purposes, this figure shows the front clamp device 35 in a vertical position, and the inserted wire W
A heavy object R is fixed to the lower end of. and,
The clamping fittings 53 are held at the lower limit position, and both gripping bodies 4
6 grips the wire W.

Assume now that the clamp device 35 is fixed. In this case, when an upward force is applied to the wire W, the friction between the wire W and the inner surfaces of both the gripping recesses 47 causes the gripping bodies 46 to move toward the front separator 6.
2 and the clamping fittings 53, the wire W is moved slightly upward, and the wire W is not gripped between the gripping recesses 47. Therefore, the wire W is allowed to move upward even though the clamp device 35 is held in the grip state. Conversely, if a downward force is applied to the clamp device 35 while the wire W is fixed and does not move, both the gripping bodies 46 are similarly moved slightly open, so that the clamp device 35 is moved downward. You can move towards one direction. That is, the clamping device 35 has a permissive function of permitting relative forward movement of the wire W in the gripping state.

On the other hand, when the wire W is gripped, the wire W
When the gravity of the heavy object R acts on the wire W, due to the friction between the wire W and the gripping recess 47 and the action of both the fixed and movable inclined surfaces 44 and 48, both the gripping bodies 46 are further moved downward and closed. is strongly held between both gripping bodies 46. Therefore, when the clamp device 35 is gripping the wire W,
It exhibits a check effect that reliably prevents the wire W from moving backward.

In addition, in this example, as described later,
The clamping devices 31 and 35 are operatively connected to each clamping fitting 53 on the outside, and the compression spring 71
A pressing spring 88, which is much stronger than that of When returning from the permissible state to the non-return state, the gripping bodies 46 are reliably engaged with the wire W. Therefore,
The wire W is reliably prevented from slipping or momentarily falling off.

Next, the articulated structure of both clamp devices 31, 35 and the retraction operation lever 75 will be explained.

As shown in FIGS. 3 and 4, a backward operation lever 75 is arranged on the rear side of the forward operation lever 12,
The handle fitting portion 76 projects to the outside through the upper rear opening 8 of the case 1. A front clamp device 35 is provided on the base end side of this backward operation lever 75.
A pair of leg pieces 77 are formed to sandwich the upper part of the rear end, and a support shaft 78 is provided protruding from the outer surface of each base end. These support shafts 78 are pivotally attached to the tips of the two front length levers 33 described above, so that the retreat operation lever 75 is rotatably supported with respect to the front length lever 33.

Further, a link 80 is pivoted at one end of each pin 79 formed protrudingly formed on the outer surface of the tip end of both leg pieces 77, and the other end is rotatably supported by the tip end of the rear length lever 29. The link 80 and the leg piece 77 of the reverse operation lever 75 connect the front and rear long levers 33 and 29 to each other, so that when the reverse operation lever 75 is rotated, the long levers 33 and 29 are Rear pin 27
It swings back and forth around the center. Therefore, due to the fitting between the elongated hole 57 and the fitting protrusion 56, the respective clamping fittings 53 move back and forth, and both the clamping devices 31 and 35 operate in the gripping or releasing state as described in detail below. be done. Therefore, the 5th, 13th,
The linkage between the backward operation lever 75 and both the front and rear clamp devices 31, 35 will now be explained based on FIG. 14.

FIG. 5 shows a state in which the reverse operation lever 75 is held at the rearmost operation limit position, and at this time, both the front and rear long levers 33, 29 are arranged at the rear rotational position, and both clamping brackets are 53 is placed in the retracted position, and both the front and rear clamp devices 35, 31 are held in the gripping state described above (see FIG. 7). If the reverse operation lever 75 is operated forward in this state, the front length lever 33 will move as shown in FIG.
Since rotation in the clockwise direction in the figure is prevented,
The reverse operation lever 75 begins to rotate about the support shaft 78. Then, the link 80 moves forward and the rear length lever 29 is tilted forward, so that the clamping fitting 53 moves forward and both gripping bodies 46 are moved open as shown in FIG.
is in a released state in which it does not grip the wire W.

On the other hand, as shown in FIG.
5 is operated rearward from the front operating limit position (indicated by the chain line in the figure), the rear lever 29 is returned to the rearward tilted state by the action of a pressing spring 88, which will be described later. Since the tilting in the middle clockwise direction is prevented, the reverse operation lever 75 begins to rotate about the pin 79, unlike the case described above. Therefore, the front length lever 33 is tilted forward by the arc movement of the support shaft 78, so the clamping member 53 moves forward, both grips 46 are moved to open, and the front clamp device 35 is brought into the released state.

Next, the configuration of the set lever 81 that is operated when inserting the wire W into the wire traction machine will be explained based on FIGS. 3, 4, and 10.

A set lever 81 made of two strips is disposed within the shoulder at the front end of the case 1, and its front end projects outside the case 1 through the shoulder opening 6. A fishhook-shaped operating member 82 is fixed between the front ends of the set lever 81, and a catch part 84 that can be engaged with a catch pawl 83 fixed on the upper surface of the wire guide gutter 36 is provided on the lower surface of the rear end. It is formed. Further, two spring fitting rods 86 are loosely inserted into a pair of bent convex portions 85 formed to protrude outward at the rear end of the set lever 81 so as to be movable back and forth, and their rear ends are connected to each other. When the reverse operation lever 7 is
It is inserted between both leg pieces 77 of No. 5. Therefore,
The set lever 81 is supported by both spring fitting rods 86 so as to be tiltable up and down with respect to the retraction operation lever 75.

Each of the clamping devices 3
Two pressure springs 88 which are much stronger elastic members than the compression springs 71 in 1 and 35 are fitted respectively, and the latching portion 84 of the operating portion 82 is latched to the latching claw 83. When the reverse operation lever 7 is in operation, the spring force of the pressing spring 88
5 is pressed backwards.
Therefore, the link 80 and the rear length lever 29
The clamping fitting 53 of the rear clamping device 31 is pushed rearward through the support shaft 78 and the front length lever 33, and the clamping fitting 53 of the front clamping device 35 is pressed in the same direction via the support shaft 78 and the front length lever 33. Therefore, as described above, each clamping device 31, 35
When the two gripping bodies 46 shift from the released state to the gripping state, the closing movement of both gripping bodies 46 is performed smoothly, and the grip on the wire W is ensured.

Further, as shown in FIG. 10, the bent convex portion 85
A regulating tongue piece 89 is formed to protrude from the upper end edge of either side. When the set lever 81 operates, its top comes into contact with the inner wall surface of the case plate 2, thereby restricting the upward tilting of the set lever 81 and maintaining the latching relationship between the latching portion 84 and the latching pawl 83. are doing.

On the other hand, as shown by the chain line in the figure, when the set lever 81 is moved backward against the spring force of the pressing spring 88, the set lever 81 is moved slightly clockwise in the figure using the top of the regulating tongue piece 89 as a fulcrum. When tilted, the latching portion 84 engages the latching claw 83.
is moved to an upper position where it does not engage. In this state, when the set lever 81 is returned to the front according to the spring force of the pressing spring 88, the set lever 81 is in a state where it protrudes more from the wide portion 6 than when it is operated, as shown by the solid line in the figure. in,
The latching relationship between the latching portion 84 and the latching claw 83 is released. Therefore, when the set lever 81 is in the inactive state, the spring force of the pressing spring 88 is eliminated, and the reverse operation lever 75 is deenergized.

The operating handle 90 of this wire traction machine, which is used by being fitted alternately to the forward operating lever 12 and the reverse operating lever 75, is formed into a cylindrical rod shape as shown in FIG. Handle fitting portions 14, 7 of operating levers 12, 75
A lever fitting portion 91 that can be fitted into the lever 6 is press-molded into a flat shape. The diameter and wall thickness of the operating handle 90 are set according to the towing capacity of the wire towing machine body, and if a load exceeding the towing capacity is applied, the operating handle 90 may bend during operation. This system is designed to notify the operator of danger.

This concludes the explanation regarding the configuration and operation of each part in this wire traction machine. Next, the operating method of this wire traction machine will be explained in the order of wire insertion operation, forward operation, and backward operation.

First, the case of inserting the wire W into the wire traction machine will be explained mainly based on FIG. After disengaging the hook 84 from the claw 83, the set lever 81 is pulled forward while the operating section 82 is slightly lifted. Then, as shown by the solid line in the figure, the retraction operation lever 75 is moved forward, the front length lever 33 is tilted forward, the clamping fitting 53 of the front clamp device 35 is advanced, and the link 80 is moved forward. Through this, the rear length lever 29 is similarly tilted forward, and the clamping fitting 53 of the rear clamp device 31 is advanced.

Therefore, as shown in FIG.
is moved forward and opened, and both the front and rear clamp devices 3
5 and 31 are both held in the released state. In this released state, the wire W is introduced into the case 1 from the wire introduction port 38 and passed through the wire insertion hole 15 of the rear clamp device 31, the front clamp device 35, and the forward operation lever 12, and then the wire W is inserted into the wire guide trough 37.
The wire is led out of the case 1 through the wire lead-out gutter 36.

Then, by pushing the set lever 81 into the case 1 again while resisting the pressing spring 88 and hooking the hooking portion 84 to the hooking pawl 83, the twelfth
As shown in the figure, the entire retreat operation lever 75 is moved backward by the spring force of the pressing spring 88 in the operating state, and contrary to the case described above, both the clamp devices 31 and
35 both shift to the gripping state. Therefore, the inserted wire W is gripped so as not to be retractable, and the wire insertion operation is completed. In addition, the set lever 81
In the operating state, the regulating tongue piece 89 prevents the set lever 81 from tilting upward, so even if peripheral equipment or the like comes into contact with the operating section 82, there is no fear that the locked state will be released. Moreover, even if the clamping device 31 and 35 are released, the wire W is reliably prevented from falling off due to the non-returning action of both the clamping devices 31 and 35.

Next, based on Figures 1, 5, and 12, wire W
We will explain the forward operation of the .

Now, Figure 1 shows this wire traction machine being used on an inclined surface, with the wire W being inserted.
A heavy object R is fixed to the tip. In this state, when moving the wire W forward to tow the heavy object R, the operation handle 90 is first fitted onto the forward operation lever 12. Next, when the operation handle 90 is rotated backward, the long pin 1 of the forward operation lever 12 is moved as shown by the arrow in FIG.
The external support plate 18 is moved backward via the link 6, and the internal support plate 21 is moved forward via the connecting link 22.

Then, as the internal support plate 21 moves forward, the front clamp device 35 is moved forward. At this time, since the front clamp device 35 is held in a gripping state by the pressing spring 88 as described above, the wire W is gripped between the two gripping bodies 46 and pulled forward. At the same time, the rear clamping device 31, which is also in the gripping state by the pressing spring 88, moves the wire W as the external support plate 18 moves backward based on the above-mentioned permissive action.
is moved backward while allowing forward movement. Then, as shown in FIG. 5, the long holes 2 of the internal support plate 21
With the guide pin 24 fixed between the external support plates 18 in contact with the rear end edge of the forward operating lever 12
rotation is stopped, and both the front and rear clamping devices 35, 3
The interval between 1 is expanded. Note that, at this time, the reverse operation lever 75 is driven by the link 80 and is tilted rearward.

Next, in this state, when the operation handle 90 is rotated forward, the rear clamp device 3 together with the external support plate 18 as shown by the arrow in the figure.
1 is advanced, the front clamping device 35 together with the internal support plate 21 is retracted. Therefore, with the wire W being held between both gripping bodies 46 of the rear clamping device 31, the front clamping device 3
5 and is pulled forward. In this way, if the operation handle 90 is continuously rotated back and forth, the wire W can be moved into the wire guide gutter 36.
The heavy load R can be pulled up to a desired position on the slope while being sequentially fed out of the case 1 from the top.

Next, based on FIGS. 13 and 14, wire W
This section explains the reverse operation.

When retracting the wire W, unlike the forward operation, first the operation handle 90 is fitted onto the retraction operation lever 75, as shown in FIG. 13. When the operating handle 90 is rotated rearward from the non-operating position indicated by the chain line in the figure, the rear length lever 29 is prevented from tilting rearward, so the rearward operating lever 75 is centered around the pin 79. The front length lever 33 is tilted forward. Accordingly, the clamping fittings 53 of the front clamp device 35 move forward, and both gripping bodies 46 are moved open to a state where they do not grip the wire W, as shown in FIG. Therefore, since the gravity of the heavy object R acts on the rear clamp device 31 in the gripped state, the wire W is strongly gripped between the two gripping bodies 46 due to the above-described check effect.

Then, in this state, if the operating handle 90 is further rotated backward as shown by the arrow in the figure,
Since forward tilting of the front length lever 33 is prevented, the reverse operation lever 7 can be moved around the support shaft 78.
5, the rear clamping device 31 is pushed back by the link 80, and at the same time, the pin 7
The front clamping device 35 is moved forward by the rotational movement of the retraction operation lever 75 about the center point 9, and the distance between the two clamping devices 31, 35 is expanded as shown in FIG. Therefore, the wire W is moved rearward as the rear clamp device 31 retreats while being held by the rear clamp device 31. At this time, both the clamp devices 31 and 35 are followed and the external support plate 18 is retracted, and
The internal support plate 21 is advanced, thereby rotating the forward operation lever 12 toward the rear.

Next, when the operating handle 90 is rotated forward from the non-operating position shown by the chain line in FIG. 7
8, and the rear length lever 29 is tilted forward via the link 80. Therefore, since the clamping fittings 53 are moved forward and the rear clamping device 31 is held in the open state, the gravity of the heavy object R acts on the front clamping device 35 in the gripping state, and due to its non-returning action, the rear clamping device 31 is held in the open state. A front clamping device 35 grips the wire W.

When the operating handle 90 is further rotated forward in this state, the front clamp device 35 is moved backward via the front length lever 33 as shown by the arrow in the figure, and the rear clamp device 35 is moved back via the link 80. is advanced. Therefore, the wire W
is moved rearward while being held by the front clamp device 35. In this way, by continuously rotating the backward operation lever 75 back and forth using the operation handle 90, the heavy object R can be lowered along the slope while the wire W is sequentially sent rearward.

This concludes the explanation of the operation of this wire traction machine. According to such an operating method, by selectively attaching the operating handle 90 to both the forward and backward operating levers 12, 75, the traveling direction of the wire W is automatically determined. Since no switching mechanism is required, the configuration is simplified, and erroneous operations can be avoided and work can be performed accurately. Moreover, since the operating handle 90 of this wire towing machine can operate the wire W during both forward and backward rotation operations,
There is no waste in operation, and work can be done quickly.

Furthermore, according to the wire traction machine of this embodiment,
Since both the front and rear clamp devices 35, 31 are arranged on the same straight line, these two clamp devices 31,
35 is in a straight line, and both the inner and outer support plates 21, 18 are moved back and forth parallel to the wire W. It can reciprocate on W. Therefore, there is no risk that the wire W will come into contact with the respective entrances and exits of the clamping devices 31 and 35 and be bent, and stress concentration generated at the bending tubes can be avoided, and the wire W and the clamping device 31 , 35 can be prevented from being damaged, and friction that hinders operation can be eliminated, and both the front and rear operation levers 12, 75 can be rotated with light force. Furthermore, since both clamp devices 31, 35 and both support plates 18, 21 are attached to two opposite sides of the two sets of lever mechanisms in a parallel state, both the front and rear lengths are adjusted as the reverse operation lever 75 is rotated. Lever 3
3 and 29 are tilted, both clamp devices 31 and 35 are only slightly moved back and forth in the direction in which the wire extends, and there is no fear that the wire W will be bent by tilting.

Further, in both clamping devices 31 and 35, each gripping body 46 is guided by each guide body 42 via a roller 51, so during towing work, these gripping bodies 46 bite between the wire W and the guide body 42 and move. There is no fear that the wires will become disabled, and the wires W can be moved smoothly in the grasping or releasing direction, and the wires W can be moved forward and backward reliably. Moreover, when the set lever 81 is in the operating state, the gripping bodies 46 of both the clamping devices 31 and 35 are always urged in the gripping direction by the pressure spring 88 as described above.
35 transitions from the open state to the gripping state, and the return movement of both grippers 46 after allowing the wire W to move in the clamp devices 31 and 35 in the gripping state. It will definitely be done. Therefore, the wire W is prevented from slipping or falling off in such a case, and this type of towing work, which tends to be dangerous, can be safely performed.

Moreover, since each gripper 46 is always biased in the release direction by the spring force of the compression spring 71 and the action of the inclined surface, the movement distance of the upper and lower grippers 46 during release movement is equal, and the wire W When each clamp device 31, 35 is held in a released state in a state where is not inserted,
It is possible to avoid the trouble that the upper gripping body 46 falls, the arrangement of the rollers 51 is disturbed, and both gripping bodies 46 become unable to open and close. Furthermore, when inserting the wire W into each of the clamp devices 31 and 35, since both grips 46 are held in the released position, the movement of the wire W is not hindered by these grips 46, and the operation can be easily performed. It can be done.

Second Embodiment Next, a second embodiment in which the present invention is embodied in a wire traction machine will be described based on the drawings. 1st
As shown in Figures 5, 16, 17, and 21, the frame 101 of the wire traction machine in this embodiment consists of two boards 102, 103 having similar shapes, and the upper ends of both boards 102, 103 are in close contact with each other. Fixed. A hook 104 is formed on this fixing portion, and the wire traction machine can be hung on any mounting location A on a building or the like using the hook 104. Further, as shown in FIG. 21, a pair of upper and lower protrusions 105 and 106 are formed on one side edge of both substrates 102 and 103, respectively, and a bolt 107 is inserted into each protrusion 105 and 106. The distance between both substrates 102 and 103 is maintained at a predetermined value by a collar 108 inserted into a bolt 107.

The case 109 of the wire traction machine consists of a pair of case plates 110, 111, both case plates 110,
111 is the bolt 1 while holding the frame 101.
07, and is assembled and fixed to both substrates 102, 103 by collars 112, 113 and nuts 114. As shown in FIG. 16, an upper through hole 115 is formed in the upper surface of the case 109, and a side through hole 116 is formed in one side thereof.

As shown in FIGS. 17 and 21, the operating lever 11 in this embodiment differs from the previous embodiment.
There is only one 7, and there is a frame 1 on the proximal end.
A pair of leg portions 119 are formed so as to sandwich one side of the substrate 101.
The support shaft 120 is mounted on a protruding support shaft 120 on the outer surface of No. 3. Then, the operating lever 117 is rotated up and down with the tip of the operating lever 117 protruding outward from the side through hole 116.

As shown in FIG. 19, the operating handle 121 in this embodiment has a cylindrical shape, and the operating handle 121 has a cylindrical shape.
It is detachably attached to 17. That is, a fitting hole 122 having four fitting recesses 128 is formed inside one end of the operating handle 121, and a pair of engaging protrusions 123 are provided on the outer periphery of the fitting hole 122 at 180 degrees apart from each other. There is. As shown in FIG. 27, when the operating handle 121 is inserted into the operating lever 117 with the arrangement of both engaging protrusions 123 matching the longitudinal direction of the frame 101, the upper and lower limits of the operating handle 121 can be operated. In this position, both engaging protrusions 123 abut on the upper and lower collars 108, respectively. Also, the 33rd
As shown in the figure, when the operating handle 121 is inserted in a state in which the arrangement of both engaging protrusions 123 is orthogonal to the longitudinal direction of the frame 101, the outer peripheral surface of one end of the operating handle 121 comes into contact with the collar 108. come into contact with Therefore, the operating handle 121 can reciprocate within a wider angle in this case than in the above-mentioned mounted state.

Next, a fixed clamp device 124 fixed to the upper part of the frame 101 and a movable clamp device 1 supported vertically movably to the lower part of the frame 101.
The configuration of No. 25 will be explained in detail.

The internal configurations of both clamp devices 124 and 125 are the same except for a portion described later. Therefore, the configuration of the movable clamp device 125 will be explained based on FIGS. 20, 25, and 26.

As shown in FIG. 20, two side plates 126 having similar shapes are fixed by four caulking pins 127 with guide bodies 129 sandwiched between the left and right sides thereof. Fixed inclined surfaces 130 that approach each other downward are formed on the opposing side end surfaces of each guide body 129, and an upper step portion 131 is provided above the fixed inclined surfaces 130.

Furthermore, a pair of gripping bodies 132 are freely movably disposed between both guide bodies 129 and facing each other. A gripping recess 133 having a semicircular cross section for gripping the wire is formed on the side end faces of these gripping bodies 132 facing each other, and a gripping recess 133 having a semicircular cross section for gripping the wire is formed on the side end faces facing the guide body 129, which is parallel to the fixed inclined surface 130. The movable inclined surface 134 and the upper step portion 1
A lower step portion 135 is formed to face 31 from below. Then, both upper and lower step portions 131 and 13 are provided between the movable inclined surface 134 and the fixed inclined surface 130.
A plurality of rollers 138 are rotatably interposed between the rollers 5 and 5. Furthermore, an upper inclined surface 136 and a lower inclined surface 137 are formed on the upper and lower surfaces of both gripping bodies 132, respectively, as guide surfaces that widen toward the outside. Note that, unlike the above embodiment, the angle of inclination of each inclined surface with respect to the insertion direction of the wire W is such that both the fixed and movable inclined surfaces 130 and 134 are
10°, and both upper and lower inclined surfaces 136, 13
7 is 70°.

The clamping fitting 139 in this embodiment consists of a pair of leg pieces 141 and a connecting plate 140 connecting the upper ends thereof, and can be attached to the clamp device 124 so as to be vertically movable with both side plates 126 being sandwiched between the leg pieces 141. It is worn. A wire insertion hole 142 is provided in the center of the connecting plate 140, and spring fitting recesses 143 are formed in the lower surface on both sides thereof.

An upper separator 144 as a movable separator is interposed in the upper end of the clamping fitting 139 so that it can move up and down slightly (shown as a gap S in FIG. 12) between the connecting plate 140 and the gripper 132. A wire insertion hole 145 is provided in the center thereof. The lower surface of this upper separator 144 has an inclined surface 14 that joins to the upper inclined surface 136 of the gripping body 132.
6 is formed. Further, the wire insertion hole 142 of the connecting plate 140 is provided on the upper surface of the upper separator 144.
A fitting cylindrical portion 147 that fits into the spring is provided in a protruding manner, and a pair of spring housing recesses 148 corresponding to the spring fitting recesses 143 are formed. A spring 149 is interposed between the spring housing recess 148 and the spring fitting recess 143, and the upper separator 144 is always urged downward by the spring force.

In addition, as shown in the figure, the movable clamp device 125
The fitting cylinder portion 147 in is formed short so as not to protrude from the connecting plate 140. but,
Fitting cylinder portion 147 in fixed clamp device 124
is a movable clamp device 125 as shown in FIG.
It is formed longer than the one on the side.

On the other hand, the lower separator 150 is fixed at the lower end of the clamping fitting 139 between its legs 141 by a pair of caulking pins 151, and a wire insertion hole 152 is provided in the center thereof. An inclined surface 153 is formed on the upper surface of the lower separator 150 to connect with the lower inclined surface 137 of the gripper 132 . Therefore, both gripping bodies 132 are held between the upper separator 144 and the lower separator 150, and are moved to the outside ( 25) is biased toward the direction of arrow A in FIG. Note that 154 shown in FIG. 20 is a notch formed at the lower end of the side plates 126, and the lower separator 150 and the side plates 126
This is to avoid interference with the

The gripping and releasing functions of the fixed and movable clamp devices 124 and 125 configured as described above will now be described.

FIG. 25 shows the closed state of the grip 132 when the wire W is not inserted. When the clamping fittings 139 are moved upward in this state, each gripping body 13 that is biased outward as described above
2 is guided by the fixed inclined surface 130 via the roller 138 and moves obliquely upward, and the interval between the respective gripping recesses 133 is gradually expanded. Then, as shown in FIG. 26, when each roller 138 is clamped between the upper step 131 of the guide body 129 and the lower step 135 of the gripper 132, the movement of the clamping fitting 139 is stopped, and each clamp Devices 124 and 125 are in an open state. In addition, in this open state, as both gripping bodies 132 move outward, the upper isolation body 1
The gap S is created between the upper surface of the connecting plate 44 and the lower surface of the connecting plate 140.

When the clamping fitting 139 is lowered in this open state, both gripping bodies 132 are pushed from above, and the gripping bodies 132 are moved onto the inclined surface 130 via the rollers 138.
is guided and moved diagonally downward, and both gripping recesses 1
The interval between 33 is gradually reduced. Therefore,
As shown in FIG. 25, the clamping device 124 returns to a state in which it can grip the wire W again. At this time, the gap S disappears as both gripping bodies 132 move toward each other.

In addition to the gripping and releasing functions described above, the clamping devices 124 and 125 also have the permitting and checking functions described in the above embodiments, and due to these functions, each gripping body 132 is closed when loaded. In some cases, the inserted wire W is allowed to move forward and is prevented from moving backward. However, the spring 149, which corresponds to the pressing spring 88 in the embodiment, is provided inside both the clamp devices 124, 125, and its spring force always biases both the grips 132 in the closing direction. . Therefore, both gripping bodies 13
Since the closing movement of the wire W is assisted, the so-called bite on the wire W is reliably performed, as in the previous embodiment.

The fixed and movable clamp devices 124 and 125 having the internal configuration and function described above are as follows:
frames 101, respectively, as described below.
Supported by First, as shown in FIG. 21, the fixed clamp device 124 has one side attached to the frame 1.
01 is fixed by the caulking pin 127 while being sandwiched between the two substrates 102 and 103.

On the other hand, one side of the movable clamp device 125 is clamped between the lower ends of both the substrates 102 and 103 in a non-fixed state. That is, both substrates 102,1
03 is formed with a first guide hole 157 extending in the vertical direction, and a caulking pin 127 located at the bottom of one side of the movable clamp device 125 is inserted into the first guide hole 157 so as to be vertically movable. ing.
Further, a guide plate 158 is fixed to the outer surface of the other side of both side plates 126 of the movable clamp device 125 by pins 127, and a second guide hole 159 extending in the vertical direction is provided at the upper end of the guide plate 158. The second guide hole 159 has a caulking pin 127 located at the lower part of the other side of the fixed clamp device 124.
is inserted so that it can move up and down. Therefore, this movable clamp device 125
It is adapted to be reciprocated in the vertical direction by engagement with the crimping pin 127.

Next, the articulated structure of the operating lever 117 and the movable clamp device 125 will be explained.

As shown in FIG. 27, the first guide hole 157
Two lower swing levers 161 are swingably supported at the center of the caulking pin 127 loosely fitted therein, and the upper end operating lever 11 is supported at one end of the lower swing levers 161.
Two first links 16 pivoted to the tips of 7
0 are connected to each other, and a hook portion 162 is formed at the other end. And the hook part 16
A long hole 163 is transparently provided near the hole 1.
A pin 164 protruding from the leg piece 141 of the clamping fitting 139 is fitted into the pin 63 .

On the other hand, both side plates 126 of the movable clamp device 125
Two holding levers 166 are each rotatably supported on a support shaft 167 projecting upward, and one end thereof has a cutout recess 168 that can be hooked to the hooking portion 162 of the lower swing lever 161. A fixed clamping device 12, which will be described later, is provided at the other end.
An engagement protrusion 169 that can be engaged with the engagement piece 190 of No. 4 is formed in a protruding manner. In addition, this holding lever 16
6 is always biased counterclockwise in the figure by a wire spring 170.

A lower compression spring 171 is attached to one side of the movable clamp device 125 to urge the lower swing lever 161 downward. That is, the second
As shown in Figures 2 and 27, a movable clamp device 125
An L-shaped support bracket 172 is attached to the side plate 126 of the
is fixed thereto, and a small hole 173 is provided in its horizontal portion. A rod 175 whose lower end is screwed onto the connecting cylinder portion 174 of the first link 160 is loosely inserted into the small hole 173, and a washer 176 is inserted into the upper end of the rod 175.
is inserted. A lower compression spring 17 as an elastic member is attached to the rod 175 between the washer 176 and the horizontal portion of the support bracket 172.
1 is fitted, and this spring force is applied to the movable clamp device 1.
It is much stronger than the spring 149 in 25.

Therefore, the spring force of the lower compression spring 171 always biases the rod 175 upward, so the lower swing lever 161 is biased counterclockwise in the figure around the caulking pin 127. Ru. Therefore, the engagement between the elongated hole 163 and the pin 164 forces the clamping fitting 139 downward.

The articulating action of the operating lever 117 and the movable clamp device 125 that are articulated in this manner will be described below.

First, based on FIGS. 27 to 29, the articulating action when the operating handle 121 is attached to the operating lever 117 with both engaging protrusions 123 arranged vertically will be explained.

Now, in FIG.
08, that is, the operating handle 12
1 shows the upper limit operation position. At this time, the movable clamp device 125 moves the one side lower caulking pin 12
7 is disposed at the lower limit position where it engages with the lower edge of the first guide hole 157 of the frame 101. Also,
The lower swing lever 161 is at its swing limit position in the counterclockwise direction due to the spring force of the lower compression spring 171, and is held in an unlatched state with respect to the holding lever 166. Therefore, the clamping fitting 139 is held at the lower limit position, and both gripping bodies 132 are in a closed state as shown in FIG. 25.

When the operating handle 121 is operated downward in this state, a swinging force is applied to the lower swinging lever 161 in the counterclockwise direction in the figure via the first link 160. However, as described above, since the clamping fitting 139 is held at the lower limit position and is prevented from moving downward, the movable clamping device 12
5, as the operation handle 121 is operated, the first
is moved upward along with the link 160 while being guided by the first guide hole 157 of the frame 101 and the caulking pin 127 of the fixed clamp device 124. Then, the operating handle 121
As shown in FIG. 8, when the movable clamp device 125 is operated to the lower limit operating position where the lower engaging protrusion 123 and the collar 108 between the lower protruding portion 106 abut each other, the upper surface of the clamping fitting 139 of the movable clamp device 125 is The movement is stopped at a position very close to the lower surface of the clamping fitting 139 of the fixed clamp device 124.

When the operating handle 121 is rotated upward in this state, a clockwise swinging force acts on the lower swinging lever 161 via the first link 160. However, since the spring force of the lower compression spring 171 is stronger than this swinging force, the lower swinging lever 161 does not swing.
The clamping fitting 139 is held at the lower limit position. Therefore, the movable clamping device 125 is connected to the operating handle 1
21, it is lowered together with the first link 160 while remaining in the closed state.

Note that when the movable clamp device 125 is held in the closed state during wire insertion, when a downward force is applied to the movable clamp device 125, both gripping bodies 132 are
is moved slightly open. Therefore, relative movement of the wire W with respect to this movable clamp device 125 is allowed.

Next, based on Figures 33, 34, and 35,
Operating lever 117 and movable clamp device 12 when operating handle 121 is attached to operating lever 117 with both engagement protrusions 123 arranged horizontally
The joint action with 5 will be explained.

In this case, as mentioned above, the operating handle 1
Since the rotatable range of 21 is expanded compared to the case described above, when the operation handle 121 is at the upper limit operation position as shown in FIG. Unlike this, it is held at the extreme position of clockwise rotation. The notch recess 168 of the holding lever 166 is hooked to the hook 162, and the lower swing lever 161 is prevented from swinging counterclockwise. Therefore, the clamping fittings 139 are attached to the side plate 1.
It has been moved to the upper limit position for 26th
As shown in the figure, both grips 132 of the movable clamp device 125 are open.

When the operation handle 121 is operated downward in this state, since the lower swing lever 161 is prevented from swinging, the movable clamp device 125 will move upward as the first link 160 moves upward. Moving. However, in this case, since the rotation operation range of the operating handle 121 has been expanded, the engagement convex portion 169 of the holding lever 166 first engages the fixed clamp device 124 immediately before the operating handle 121 reaches the lower limit operating position. engagement piece 190
Then, the upper surface of the clamping fitting 139 of the movable clamping device 125 contacts the lower surface of the clamping fitting 139 of the fixed clamping device 124.

Therefore, when the operating handle 121 is rotated to the lower limit operating position as shown in FIG. 34, the holding lever 166 is rotated clockwise in the figure while resisting the spring force of the wire spring 170, and the notch 168 and the latching portion 162 of the lower swing lever 161 is released. Then, the lower swing lever 161 swings counterclockwise, and the clamping fitting 139
is lowered, and both grippers 132 of the movable clamp device 125 are moved in the closing direction.

Next, the operating handle 12 at the lower limit operating position
1 is moved upward, as shown in FIG. It is moved in a downward direction. In this case, since the rotation operation range of the operation handle 121 is expanded, the movable clamp device 125 is lowered to the lower limit position immediately before the operation handle 121 reaches the upper limit operation position. When the operation handle 121 is further operated to the upper limit operation position in this state, the lower swing lever 161 is moved to the lower compression spring 171.
The holding lever 166 is latched again to the lower swinging lever 161 as the clamping fitting 139 is moved upwardly as shown in FIG. 33.

Next, regarding the fixed clamp device 124, a configuration for moving the clamping fittings 139 up and down to open and close both the gripping bodies 132 will be described.

As shown in FIGS. 21 and 22, the set lever 18 in this embodiment is operated when inserting the wire.
1 is the frame 1 above the operating lever 117.
It is rotatably supported between both substrates 102 and 103 of 01, and can always be returned to the non-operating position by a wire spring 180 (shown in FIG. 22). A pressing protrusion 182 is formed at a central bent portion of the set lever 181 so as to face downward.

On the other hand, two upper swing levers 183 are attached to the caulking pin 127 at the upper part of one side of the fixed clamp device 124.
are swingably supported at their intermediate portions, and an engaging pin 184 passing through an elliptical hole 186 transparently provided in the substrates 102 and 103 is fixed between one end thereof, and the other end is A locking portion 185 is formed in a cutout. As shown in FIG. 22, this engaging pin 184 is adapted to engage with the pressing protrusion 182 of the set lever 181. Further, a long hole 187 is formed in the vicinity of the locking portion 185 of the upper swing lever 183, and this long hole 187
A pin 188 protruding from both leg pieces 141 of the clamping fitting 139 is loosely fitted inside.

As shown in FIGS. 22 and 24, the upper compression spring 189 as an elastic member is connected to the support shaft 120 of the operation lever 117 and the upper swing lever 183 by spring support members 179 fitted to the upper and lower ends of the upper compression spring 189, respectively. interposed between the engagement pin 184,
The spring force is much stronger than the spring 149 in the fixed clamp device 124. This upper compression spring 189 is always applied to the engagement pin 18.
4 upwardly, and the upper swing lever 18
3, a counterclockwise spring force is applied. Note that the spring force of this upper compression spring 189 is greater than the spring force of the lower compression spring 171.

Therefore, when the set lever 181 is not operated, the upper compression spring 18 is closed as shown in FIG.
9, the upper swing lever 183 is held at the maximum swing position in the counterclockwise direction.
Therefore, the clamping fitting 139 is held at the lower limit position with respect to the side plate 126 by fitting the elongated hole 187 and the pin 188, and both gripping bodies 132 of the fixed clamping device 124 are in a closed state as shown in FIG. It is now being maintained.

In this state, when the set lever 181 is rotated to the lower limit operation position against the spring force of the upper compression spring 189, the upper swing lever 183 swings clockwise in the figure as shown in FIG. , the clamping fitting 139 is moved upward to the upper limit position relative to the side plate 126. Therefore, both gripping bodies 132 of the fixed clamping device 124 are opened so that the wire can be inserted.

By the way, the two engagement pieces 190 of the fixed clamp device 124 mentioned when explaining the operation of the movable clamp device 125 are the leg pieces 141 of the clamping fitting 139.
It is attached to both sides of the lower end so that its position can be adjusted.
Then, as described above, the movable clamp device 125
When the holding lever 166 is moved upward, the engaging protrusion 169 of the holding lever 166 comes into contact with the lower end of the engaging piece 190, as shown in FIG.

As shown in FIG. 21, a second link 191 is pivotally attached to the support shaft 120 of the operating lever 117. Engagement protrusions 192 are provided on the back surface of this second link 191, and as shown in FIG. In this case, the upper edge of the proximal end of the operating lever 117 comes into contact with the engaging protrusion 192 immediately before the operating handle 121 reaches the upper limit operating position.

Further, two side swing levers 194 are swingably supported by a lower caulking pin 127 on the outer surface of the other end of the fixed clamp device 124, and between the upper end of the lever and the upper end of the second link 191. Two third links 193 are connected. A notch 195 that can be engaged with the locking part 185 of the upper swing lever 183 is provided at the upper end of one side of the both-side swing lever 194.
is formed. In addition, this side swing lever 1
94 is caused by an upper wire spring 196 so that the notch 195 is always engaged with the locking portion 18 of the upper swing lever 183.
5 in the direction of engagement.

Then, as shown in FIG. 34, when the upper swinging lever 183 is swung to the maximum swinging position in the clockwise direction, the notch 195 is locked to the locking part 185 by the spring force of the wire spring 196. The clamping fitting 139 is held at the upper limit position. Therefore, both grippers 132 of the fixed clamp device 124 are held open.

Further, when the operation handle 121 is rotated to the upper limit operation position in this state, the second link 191 is tilted counterclockwise due to the engagement between the operation lever 117 and the engagement protrusion 192, as described above. The side swing lever 194 is also swung counterclockwise via the third link 193. Therefore, the locking relationship between the locking portion 185 and the cutout portion 195 is released, and the upper swinging lever 183 is swung to the maximum swinging position in the counterclockwise direction by the spring force of the upper compression spring 189. Therefore, the 33rd
As shown in the figure, the clamping fittings 139 of the fixed clamp device 124 are pushed down to the lower limit position, and both gripping bodies 132 are closed.

Reference numeral 197 shown in FIGS. 18 and 21 is a guide cylinder portion for guiding the wire W, and the fixed clamp device 1
Fitting cylinder part 1 of the upper separator 144 at 24
It is fitted and fixed to the upper surface of the case 109 so as to be located above the case 47 . The guide tube portion 197 is curved as shown in FIG. 18, and guides the wire W inserted therethrough so as not to interfere with the hook 104 of the frame 101 outside the machine. In addition, 198 in FIG. 21 is the case 10.
This is a guide opening provided on the bottom surface of 9.

This concludes the explanation regarding the configuration and operation of each part in this wire traction machine. Next, a method of operating the wire traction machine will be explained in the following order: wire insertion operation, heavy object lifting operation, heavy object lowering operation, and wire removal operation.

First, the case where the wire W is inserted into the wire traction machine will be explained based on FIGS. 22 and 23.

First, the operator selects the operating lever 117 and the set lever 181 to which the operating handle 121 is not attached.
Grasp both with one palm. Then, the 22nd
As shown in the figure, the set lever 181 is rotated from the non-operating position (indicated by the two-dot chain line in the figure) to the lower limit operating position (indicated by the solid line), and the upper swing lever 183 is moved to the upper compression spring 189 via the engagement pin 184. The clamping fitting 139 swings clockwise while resisting the spring force.
move upward. Therefore, as shown in FIG. 26, both gripping bodies 132 are moved away from each other, and the fixed clamp device 124 is opened.

At the same time, the operating lever 117 is rotated to the upper limit operating position where it directly engages the collar 108,
Lower swing lever 16 via first link 160
1 is swung to the maximum oscillation position in the clockwise direction. Therefore, by the upward movement of the clamping fittings 139, both the gripping bodies 132 are separated from each other, and the movable clamping device 125 is opened. At this time, the second
As shown in FIG. 3, the upper edge of the base end of the operation lever 117 engages with the engagement protrusion 192 of the second link 191, and the side swing lever 194 is moved counterclockwise via the third link 193. In order to swing the upper swing lever 183 to the side swing lever 194, the upper swing lever 183 is held in an unlatched state with respect to the side swing lever 194.

Next, the user inserts the wire W from the guide port 198 with the other hand, passes through both the opened clamp devices 124 and 125, and then exposes the wire W from the guide tube 197 to the outside of the machine. As shown in FIG. 24, when you release your hands from the set lever 181 and the operating lever 117 in this state, the set lever 181
is returned to the non-operating position by the spring force of the wire spring 180, and the upper swing lever 183 and lower swing lever 161 are moved to their maximum swing positions in the counterclockwise direction by the spring forces of the upper and lower compression springs 189 and 171, respectively. be swayed. Therefore, the clamping fittings 139 of both clamping devices 124 and 125 are moved down and the respective gripping bodies 132 are moved in the closing direction, so that the inserted wire W is reliably gripped between the respective gripping recesses 133. .

In this way, in this wire traction machine, the set lever 181 is provided close to the operating lever 117, so both can be gripped and operated simultaneously with one hand. Therefore, it is not necessary to open the clamp devices 124 and 125 separately, and the wire W can be quickly inserted.

Next, the operating method for lifting the load will be explained based on FIGS. 15 and 27 to 32.

Now, Fig. 15 shows the state in which the wire W is inserted as described above to this wire traction machine suspended at an arbitrary installation location A of the building, and the lower end of this wire W is attached to the wire to be towed. A heavy object R is fixed. When towing the heavy object R upward from this state, first, as shown in FIG. 27, both engaging protrusions 123 are arranged vertically and the operating handle 121 is attached to the operating lever 117. In addition,
At the start of this operation, the lower swing lever 161
If the holding lever 166 is latched, it is necessary to reciprocate the operating lever 117 once to release the latching relationship between the two before attaching the operating handle 121.

Next, when the operation handle 121 is operated downward, the lower swing lever 161 is held at the maximum swing position in the counterclockwise direction by the spring force of the lower compression spring 171, so that the first link 160 is moved downward. Movable clamp device 12 as it rises
5 is moved upward while remaining closed. Then, as shown in FIGS. 28 and 31, the operating handle 121
When the movable clamp device 125 is rotated to the lower limit operation position, the movable clamp device 125 is stopped at a position where the upper surface of its clamping bracket 139 is extremely close to the lower surface of the clamping bracket 139 of the fixed clamp device 124, and the heavy object R is held by a predetermined amount. being towed upwards.

On the other hand, at this time, the fixed clamp device 124 is held in the closed state. However, due to the above-mentioned permissive action, when an upward force is applied to the wire W, both gripping bodies 132 open slightly and allow the wire W to move upward, so that the movable clamp The wire W transferred by the device 125 can move within the fixed clamp device 124 by a predetermined feed amount.

Next, when the operation handle 121 is operated to return upward in this state, the lower swing lever 161 is prevented from swinging clockwise by the spring force of the lower compression spring 171 as described above. The force acts to lower the movable clamp device 125. Therefore, both the gripping bodies 132 are moved slightly to open and allow the relative movement of the wire W while the movable clamp device 1 is moved as shown in FIGS. 29 and 32.
25 is lowered. At this time, the wire W is connected to both grippers 13 of the fixed clamp device 124 in the closed state.
2. Furthermore, in this state, the load of the heavy object R acts downward on the wire W, so the fixed clamp device 124 can exert a check effect as described above and prevent the wire W from moving downward. . Therefore, the heavy object R is reliably prevented from falling during the downward movement of the movable clamp device 125.

In this way, by continuously performing the above-described operations, the wire W can be sequentially fed out of the machine from the guide tube portion 197 of the case 109, and the heavy object R can be raised to a desired lifting height position.

Next, the operating method for lowering the load R will be explained based on FIGS. 27 and 33 to 38.

First, the mounting position of the operating handle 121 is changed. That is, after the operating handle 121 attached during the lifting operation is removed from the operating lever 117, it is turned 90 degrees and fitted again with both engaging protrusions 123 horizontally. At this time, a gap corresponding to the height of the engagement protrusion 123 is created between the outer peripheral surface of the attached operating handle 121 and the collar 108 between the upper protrusion 105.

Therefore, in this state, when the operation handle 121 is rotated to the upper limit operation position as shown in FIG.
9 is raised while resisting the spring force of the lower compression spring 171, and the holding lever 166 is latched to the lower swing lever 161. For this reason, the 36th
As shown, the movable clamp device 125 is held open. Therefore, at this time the wire W
is gripped by a fixed clamping device 124 in the closed state.

Next, from this state, if the operating handle 121 is operated toward the lower limit operating position, the movable clamp device 125 is moved upward. Then, as shown in FIG. 34, when the engagement protrusion 169 of the holding lever 166 comes into contact with the engagement piece 190 of the fixed clamp device 124, the holding lever 166 and the lower swing lever 1
61 is released, the clamping fitting 139 is lowered and the movable clamping device 125 grips the wire as shown in FIG.

At the same time as the movable clamping device 125 is closed, its clamping fitting 139 closes the fixed clamping device 12.
4. Push up the clamping fitting 139. Then, the upper swing lever 183 swings to the maximum swing position in the clockwise direction and is locked to the side swing lever 194, so that the fixed clamp device 124 is held in the released state. Therefore, at this time, the load of the heavy object R acts on both the gripping bodies 132 of the movable clamp device 125, and the wire W is strongly gripped between the gripping recesses 133 due to the above-described non-return action.

Thereafter, as shown in FIGS. 35 and 38, when the operating handle 121 is operated toward the upper limit operating position,
The movable clamp device 125 is moved downward while gripping the wire W, and the heavy object R is lowered by a predetermined amount. When the movable clamp device 125 reaches the lower limit position again as shown in FIG. Rotate clockwise. Therefore, the side swing lever 194 is swung via the third link 193, and the locking relationship with the top swing lever 183 is released. Therefore, the fixed clamp device 124 returns to the gripping state and grips the wire W strongly. Further, in synchronization with the closing of the fixed clamp device 124, the holding lever 166 is hooked to the lower swing lever 161, and the movable clamp device 125 is released as described above.

In this way, if you perform the above operations continuously,
The heavy object R can be lowered to a desired position while sequentially introducing the wires W into the machine from the guide tube portion 197 of the case 109.

Finally, the operation for removing and removing the wire W when lifting and lowering the heavy object R is completed will be described.

In this case, after removing the operating handle 121 from the operating lever 117, operate the operating lever 117 and the set lever 1 in the same way as when inserting the wire described above.
81 together with control. Then, the clamping fittings 139 of both the clamp devices 124, 125 are moved upward via both the upper and lower rocking levers 183, 161, and each grip body 132 is moved open. Therefore, by pulling the wire W downward in this state, it can be easily removed.

Further, in this case, since the load of the heavy object R is not acting on the wire W, it is possible to easily grasp and operate the set lever 181 with one palm. However, when the fixed clamp device 124 is closed during lifting and lowering of the heavy object R, the clamping fittings 139 together with the gripping bodies 132 are strongly pulled downward by the weight of the heavy object R. The set lever 181 is firmly locked in a non-operating position by an upper swinging lever 183. For this reason, during work, this set lever 18
If the operator's hand inadvertently touches the set lever 18 or the surrounding equipment hits it, the set lever 18
1 is rotated and the fixed clamping device 124 is released, there is no risk of injury. Therefore, it is possible to prevent the heavy object R from falling unexpectedly and ensure safety during work.

This concludes the explanation of the configuration and operation of the wire traction machine in the second embodiment. In this wire traction machine, unlike the first embodiment, the traveling direction of the wire W can be changed by changing the angle at which the operating handle 121 is attached to the operating lever 117.
The configuration can be simplified by using only one.
In addition, both upper and lower compression springs 18 in this embodiment
9,171 and each clamp device 124,125
Although the springs 149 inside are different from those in the first embodiment in their mounting locations, they are the same in function and effect, and prevent the wire W from slipping or falling off as described above, and also prevent the wire W from slipping or falling off. The W insertion operation can be facilitated.

Furthermore, the clamping devices 124, 125 can be brought into the released state by simply rotating the set lever 181 from the non-operating position to the operating position, and when the set lever 181 is released from the operating position, the set lever 181 can be released. 181 automatically returns to its original non-operating position, and the clamp device 1
24, 125 can be brought into the gripping state again.

Note that this invention is not limited to the above-mentioned embodiments, and can be embodied by arbitrarily changing the configuration and shape of each part without departing from the spirit of the invention. It can also be applied to various types of devices.

Effects As detailed above, the first invention of this application is
A pair of gripping bodies are provided in which at least one of them is movable so that the wire can be gripped and released between the two, and a guide body is arranged outside the movable gripping body, and the guide body and the movable gripping body face each other. An inclined surface that is substantially parallel to each other is formed on each surface, and a rotating body is interposed between both inclined surfaces, so that as the movable grip body and the guide body move relative to each other in one direction, both inclined surfaces and In a wire clamping device in which a movable gripping body is moved in a gripping direction by the action of a rotating body, and the movable gripping body is moved in a releasing direction as a result of their relative movement in the other direction, the movable gripping body By providing a biasing member that is operatively linked and always biases the movable gripping body in the releasing direction, it is possible to smoothly and reliably perform the gripping or releasing operation of the wire, and also to prevent the wire from being inserted. If the clamp device is held in the released state when the clamp device is not in use, the gripping body will fall in the gripping direction, the arrangement of the rotating body will be disrupted, and both gripping bodies will not be able to open and close. This provides an excellent effect in that the wire can be inserted through the clamp device without being hindered in its progress.

The second invention of this application is provided with an elastic member that always urges the movable gripping body in the gripping direction, so that the movable gripping body can be reliably engaged with the wire, and the wire can be prevented from falling off. , the clamping device can be brought into the open state and the wire can be inserted between the two gripping bodies by a simple operation of rotating the set lever from the non-operating position to the operating position against the biasing force of the elastic member, and When you release your hand from the set lever in the operating position, the set lever automatically returns to its original non-operating position, and the clamping device returns to the gripping state, allowing you to reliably grip the wire inserted between the two grippers. be effective.

[Brief explanation of drawings]

Figures 1 to 14 show the first embodiment of this invention.
Fig. 1 is a front view showing how the wire traction machine is used, Fig. 2 is a plan view thereof, Fig. 3 is a plan view showing the upper surface of the case 1 cut away, and Fig. 4 shows an embodiment. 5 is a front view with one case plate 2 removed, and FIG. 5 is a sectional view taken along line 5--5 in FIG. 3. Figure 6 shows the front clamping device 35.
FIGS. 7 and 8 are sectional views of the front clamp device 35 in different operating states, and FIG. 9 is an operational view for explaining the permitting and checking functions. FIG. 10 is a cross-sectional view showing the operating state of each part during wire insertion, and FIG. 11 is a partially cutaway perspective view showing the operating handle 90. 12 to 14 are cross-sectional views in different operating states, with FIG. 12 showing the forward operation, and FIGS. 13 and 14 showing the backward operation. 15 to 38 show a second embodiment embodying the present invention, in which FIG. 15 is a front view showing the wire traction machine in use, FIG. 16 is a right side view thereof, and FIG. 17 is a A right side view of the case 109 with the side section cut away, FIG. 18 shows the guide cylinder part 19.
19 is a sectional view showing operation handle 121.
FIG. 20 is a perspective view showing the movable clamp device 12.
FIG. 5 is an exploded perspective view of No. 5. Figure 21 shows case 109.
22 and 24 are cross-sectional views showing different operating states when the wire is inserted, FIG. 23 is an explanatory view of the operation around the upper swing lever 183, and FIG. 25 and 26 are cross-sectional views of the movable clamp device 125 in different operating states. FIGS. 27, 28, and 29 are right side views showing different operating states during lifting work, and FIGS.
Figures 31 and 32 show both fixed and movable clamping devices 124, 1 in their respective operating states.
25. FIG. FIGS. 33, 34, and 35 are right side views showing different operating states during the lowering operation, and FIGS. 36, 37, and 38 show both clamping devices 124, 125 is a cross-sectional view of FIG. Guide bodies 42, 129, fixed inclined surfaces 44, 13
0, gripping body 46, 132, movable inclined surface 48, 13
4. Rollers 51, 138 as rotating bodies, compression spring 71 as a biasing member, pressing spring 88 as an elastic member, lower compression spring 171, upper compression spring 1
89, set lever 181, wire W.

Claims (1)

[Scope of Claims] 1. A pair of gripping bodies 46 are provided, at least one of which is movable so that the wire W can be gripped and released between the two, and a guide body 42 is disposed outside the movable gripping body 46. The guide body 42 and the movable gripping body 46 form sloped surfaces 44 and 48 that are substantially parallel to each other on their opposing surfaces, and a rotary body 51 is interposed between both sloped surfaces 44 and 48 to form the movable gripping body. As the body 46 and the guide body 42 move relative to each other in one direction, the movable gripping body 46 is moved in the gripping direction by the action of both inclined surfaces 44, 48 and the rotating body 51, and the movable gripping body 46 is moved in the other direction. In a wire clamp device in which the movable grip body 46 is moved in the release direction with relative movement, an urging force is operatively linked to the movable grip body 46 and always urges the movable grip body 46 in the release direction. A wire clamp device characterized in that a member 71 is provided. 2 A pair of gripping bodies 132 are provided, at least one of which is movable so that the wire W can be gripped and released between the two, and the movable gripping body 13
A guide body 129 is placed on the outside of the guide body 1.
29 and the movable gripping body 132 face each other, inclined surfaces 130 and 13 are substantially parallel to each other.
4, and a rotating body 138 is interposed between both inclined surfaces 130 and 134 to connect the movable grip body 132 and the guide body 1.
29, the movable grip body 132 is moved in the grip direction by the action of both inclined surfaces 130, 134 and the rotating body 138, and as the movable grip body 132 is moved relative to the other direction, the movable grip body 132 is moved in the grip direction. In a wire clamp device in which the gripping body 132 is moved in the releasing direction, elastic members 171 and 189 are provided which are operatively connected to the movable gripping body 132 and always bias the movable gripping body 132 in the gripping direction. A wire clamp device characterized in that a set lever 181 which is rotatable against the biasing force of the elastic members 171 and 189 is provided so as to be able to always return to a non-operating position. 3 The rotating body includes a plurality of cylindrical rollers 51,
138. The wire clamping device according to claim 1 or 2, which is 138.