JPH05200678A - Belt tightener for load - Google Patents

Abstract

PURPOSE:To do prescribed belt tightening work simply without pulling an adjusting side belt fully to the body side manually in advance before operation of a control lever. CONSTITUTION:A pressing body 20, having a pressing part 21 to press an adjusting side belt 3 to the peripheral surface of a wound shaft 4 being rotated by a control lever 5, is rockably pivoted to a body 1 engaging a fixed side belt 2, and there is provided an elastic body 22 for pressing the pressing part 21. In succession, the fixed side belt 2 is engaged to an opposite side position of the pressing part 21 as holding the pivoted position in the pressing body 20 between, and with an action of the elastic body 22, the adjusting side belt 3 is pressed to the wound shaft 4 with the pressing part 21 and with rotation of this wound shaft 4, the adjusting side belt 3 is pulled into the side of the body 1 without rolling it on this wound shaft 4 as much as more than one roll, through which this wound shaft 4 is made so as to be freely rotatable till base belts 2 and 3 are tensed into tensity, thereby dispensing with the work to fully pull the adjusting side belt 3 into the side of the body 1 manually in advance before operation of the control lever 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load clamp, more specifically, a main body for locking a fixed side belt, a winding shaft rotatably supported by the main body and for winding an adjustment side belt, The present invention relates to a load clamp machine, which is swingably supported by a main body and includes an operation lever which drives the winding shaft so as to be switchable between forward and reverse directions.

[0002]

2. Description of the Related Art Conventionally, this kind of load clamping machine is, for example, an actual open flat 2
The one described in Japanese Patent Publication No. 150166 is known. As shown in FIG. 6, the load clamp disclosed in this publication is provided with a locking shaft C for locking the stationary belt B on one end side of a main body A having a pair of side plates, and other main body A. A winding shaft E around which the adjusting belt D is wound is rotatably provided on the end side, and a U-shaped operation lever F can be swung at both ends of the winding shaft E extending laterally of the main body A. Support. Further, a reverse rotation preventing gear G is provided between one side plate of the winding shaft E and the lever F, a gear portion is provided on an outer peripheral portion, and a drive member H that is rotated by the swing of the lever F is provided. ing.

Further, the main body A near the winding shaft E is provided with a connecting rod I in parallel with the winding shaft E, and the connecting rod I is engaged with the reverse rotation preventing gear G so that Winding axis E
The reverse rotation preventing claw J for preventing the reverse rotation of the winding shaft is pivotally supported, and the operation lever F near the winding shaft E is also provided with a pivot shaft K parallel to the winding shaft E. The operation lever F having a transmission pawl L pivotally supported by K on the gear portion of the drive member H to rotate the drive member H in the forward and reverse directions and having the winding shaft E as a swing center. The winding shaft E is rotated in the forward direction by the swinging operation to wind the adjustment side belt D around the winding shaft E, and the belts B and D are tensioned to tighten the load, or the winding is performed. By rotating the mounting shaft E in the reverse direction, the tension of the belts B and D can be released and the load tightening can be released.

[0004]

However, in such a conventional load clamp, the winding shaft E has a locking hole (not shown) through which the adjusting belt D is inserted in the radial direction thereof. The winding shaft E is formed on the mounting shaft E, the adjustment side belt D is inserted into the locking hole, and the winding shaft E is swung by the swinging operation of the operating lever F.
Is rotated and the adjustment side belt D is wound around the outer circumference of the winding shaft E, so that the adjustment side belt D is drawn to the main body A side and the belts B and D are tensioned. Therefore, the belt D wound around the winding shaft E
When the winding amount of the adjusting side belt D increases, that is, when the winding thickness of the adjusting side belt D on the outer peripheral surface of the winding axis E increases, the adjusting side belt D wound around the winding axis E is wound. The winding shaft E may not be able to rotate before the belts B and D are brought into a predetermined tension state by contacting the connecting rod I and the pivot shaft K provided near the mounting shaft E. The pulling length of the belt D is limited. Therefore, before the swinging operation of the operating lever F, the adjusting side belt D is sufficiently pulled into the main body A side to rotate the winding shaft E. The length of pulling in the adjustment side belt D to the main body A side, that is, the tension margin, must be shortened, and
Even if the adjustment side belt D is pulled in sufficiently, there is a problem that the belts B and D cannot be brought into a predetermined tension state in some cases.

The present invention has been made in view of the above problems, and an object thereof is to sufficiently pull in the adjustment side belt to the main body side in advance before operating the operating lever, and to sufficiently reduce the pulling amount. Even so, it is still another object of the present invention to provide a load tightening machine that can perform a desired load tightening and can easily perform the load tightening work.

[0006]

In order to achieve the above object, in the present invention, a main body 1 for locking a stationary belt 2 is provided,
A winding shaft 4 that is rotatably supported by the main body 1 and that winds the adjustment-side belt 3; and an operation lever that is swingably supported by the main body 1 and that drives the winding shaft 4 so that it can be switched between forward and reverse directions. 5, the main body 1 has a pressing portion 21 that opposes the outer peripheral surface of the winding shaft 4 and presses the adjustment-side belt 3 wound around the winding shaft 4. The pressing body 20 is swingably pivoted, and an elastic body 22 for pressing the pressing portion 21 of the pressing body 20 against the outer peripheral surface of the winding shaft 4 is provided, while the pressing body 20 is attached to the main body 1. The fixed belt 2 is locked at a position opposite to the pressing portion 21 with the pivotal position interposed therebetween.

Further, it is preferable that the outer peripheral surface of the winding shaft 4 is provided with a large number of locking projections 47 so that the pressing portion 21 of the pressing body 20 can roll.

[0008]

With the operation of the elastic body 22, the pressing portion 21 of the pressing body 20 presses the adjusting side belt 3 against the outer peripheral surface of the winding shaft 4, and the winding lever is operated by operating the operating lever 5. Since the adjusting side belt 3 can be pulled into the main body 1 side by the rotation of 4, the fixed side belt 2 and the adjusting side belt 3 can be tensioned without winding the adjusting side belt 3 around the winding shaft 4 more than once. You can As a result, a connecting shaft pivotally supporting a reverse rotation preventing pawl for preventing the reverse rotation of the winding shaft 4 and a pivot shaft pivotally supporting a transmission pawl for transmitting the power of the operation lever 5 to the winding shaft 4. Even when the operation lever 5 is provided in the vicinity of the winding shaft 4, the adjustment side belt 3 drawn into the main body 1 side by the operation of the operation lever 5 does not come into contact with the connecting shaft or the pivot shaft. Even if the adjustment side belt 3 that is manually pulled in to the main body 1 side is insufficient, the winding shaft 4 can be freely rotated by operating the operation lever 5 until the belts 2 and 3 reach a predetermined tension state. Can be made

Therefore, even if the adjustment side belt 3 is not fully retracted manually to the main body 1 side before the operation lever 5 is operated to shorten the retracting length of the adjustment side belt 3 by the operation of the operation lever 5, each belt Since a few tensions can be made in a predetermined tension state, the work of tightening the load can be easily performed, and even if the adjustment side belt 3 is not pulled in sufficiently, the operation lever 5 is operated. Each belt 2,
3 can be brought into a predetermined tension state, and the load can be effectively clamped.

Further, since the pressing body 20 is pivotally supported by the main body 1 and the fixed side belt 2 is locked at a position opposite to the pressing portion 21 with this pivoting position interposed, the winding belt is wound. When a tension force acts on the adjustment belt 3 as the adjustment belt 3 is pulled into the main body 1 by the rotation of the attachment shaft 4, the pressing force of the pressing portion 21 that presses the outer peripheral surface of the winding shaft 4 is increased. By increasing the pressing force, the adjusting side belt 3 can be more reliably pulled in without slipping in accordance with the rotation of the winding shaft 4.

When a large number of locking projections 47 are provided on the outer peripheral surface of the winding shaft 4 so that the pressing portion 21 of the pressing body 20 can roll, the adjustment side belt 3 is pressed by the pressing portion 21. Since the adjusting side belt 3 is engaged with the plurality of engaging protrusions 47, the adjusting side belt 3 can be made less slippery with respect to the outer peripheral surface of the winding shaft 4, and the adjusting side belt 3 can be reliably pulled into the main body 1 side. Also, since the pressing portion 21 that presses the adjusting side belt 3 rolls, the frictional resistance between the adjusting side belt 3 and the pressing portion 21 can be reduced, and thus the adjusting side belt 3 can be less damaged. In addition, the winding shaft 4 can be rotated with a light force.

[0012]

1 to 5 show an embodiment of a load clamp according to the present invention, in which a length of a main body 1 having a pair of elongated side plates 11 and 12 provided facing each other at a predetermined interval. On one side of the direction,
A fixed rod 1 for fixing the side plates 11 and 12 at a predetermined interval.
3 is provided, and a reverse rotation preventing claw 65 described later
A connecting shaft 14 that also serves as a pivot shaft that pivotally supports is provided via a tubular spacer 15. Further, as shown in FIG. 3, a winding shaft 4 around which the adjusting-side belt 3 is wound is rotatably supported at the other end in the length direction through supporting holes 16 and 17.

At both ends of the winding shaft 4 extending outward in the width direction from both side plates 11 and 12, a pair of arms 51 and 52 facing each other and a space between one ends of these arms 51 and 52 are provided. A U-shaped operation lever 5 composed of a cylindrical grip portion 53 to be connected is swingably supported, and between one side plate 12 of the winding shaft 4 and one arm 52 of the lever 5, A transmission mechanism 7 having a mechanical brake 6 for transmitting power generated by swinging of the lever 5 to the winding shaft 4.
Is intervening.

As shown in FIG. 3, the transmission mechanism 7 is integrally formed with a flange portion 41 extending outward in the radial direction of the winding shaft 4 at one end of the winding shaft 4 in the axial direction. Mouth 41
A protruding shaft portion 43 having a screw portion 42 is integrally formed on the outer side of the gear while a gear portion 81 and a lever supporting boss portion 8 are formed.
2 and the pressing portion 83 are integrally formed, the driving member 8 is screwed to the screw portion 42 so as to be able to advance and retreat, and a tooth portion is provided on the outer peripheral portion between the driving member 8 and the collar portion 41. A reverse rotation preventing gear 62 having 61 and a pair of brake plates 63, 64 are rotatably supported, and the reverse rotation preventing pawl 65 pivotally supported on the connecting shaft 14 protruding outward from the side plate 12 is used for the reverse rotation. The mechanical brake 6 is configured so as to be biased to the prevention gear 62 side so as to mesh with the tooth portion 61, and further,
A pivot shaft 55 that connects the pair of arms 51 and 52 is provided in the lever 5 in the vicinity of the winding shaft 4 in parallel with the winding shaft 4 through a tubular spacer 54. As shown in FIG. 5, a transmission claw 9 composed of a feed claw 91 and a return claw 92 that can be engaged with and disengaged from the gear portion 81 of the drive member 8 is swingably provided on the shaft 55. By the swinging operation of, one of the feed claw 91 and the return claw 92 is selectively engaged with the gear portion 81, and the drive member 8 is normally rotated (rotated or reversely rotated in the retracting direction of the adjustment side belt 3). It is configured to let.

Further, the threaded portion 4 of the winding shaft 4
A screw hole 44 in the axial direction is provided on the second side, and a stopper 45 of the drive member 8 is attached by screwing a tightening bolt 46 into the screw hole 44.

Outside the one side plate 12 of the main body 1, a pressing body 66a, a spring 66b, and a holder 66c are provided, and the pressing body 66a is pushed to the rear side of the reverse rotation preventing claw 65 by the pressing of the spring 66b. Always contact the reverse rotation prevention claw 65
While the first holding mechanism 66 is provided for holding the engagement state in which the reverse rotation preventing gear 62 is engaged and the non-engagement state in which the reverse direction prevention gear 62 is not engaged, the pressing body 93a is also provided inside one arm 52 of the operation lever 5. And a spring 93b and a holder 93c, the pressing body 93a is constantly brought into contact with the rear surface side of the transmission pawl 9 by the pressing of the spring 93b, and the feed pawl 91 and the return pawl 92 of the transmission pawl 9 are connected to the drive member. No. 2 for maintaining an engaged state selectively engaged with the gear portion 81 of No. 8 and a disengaged state not engaged
By providing a holding mechanism 93, the reverse rotation preventing claw 65 and the transmission claw 9 are provided.
Is capable of maintaining a predetermined state.

Thus, in the load clamping machine configured as described above, the adjustment side belt 3 wound around the winding shaft 4 is pressed against the main body 1 so as to face the outer peripheral surface of the winding shaft 4. A pressing body 20 having a pressing portion 21 is pivotally attached to the connecting shaft 14 so as to be swingable, and the pressing body 20 and the side plate 11 are
An elastic body 22 that presses the pressing portion 21 of the pressing body 20 against the outer peripheral surface of the winding shaft 4 is provided between the pressing body 20 and the pressing body 20. The fixed belt 2 is locked at a position opposite to the portion 21.

That is, as shown in FIGS. 1 and 3,
A pair of arcuate members 31, 32 and these arcuate members 31, 3
2, a locking shaft 23 that connects the ends of the fixed rod 13 on the fixed rod 13 side and locks the fixed belt 2, and these arcuate members 31, 3
The pressing body 20 is formed from a support shaft 24 that connects the end portions of the winding shaft 4 on the side of the winding shaft 4 and that supports the pressing portion 21 (hereinafter referred to as a roller) formed of a roller in a freely rolling manner. A pivotal support hole (not shown) is provided near the locking shaft 23 at an intermediate portion in the longitudinal direction of each arcuate member 31, 32, and the pressing body 20 is centered on the connecting shaft 14 through these pivotal support holes. It is pivotally mounted on the spacer 15 so that it can be swung.

Further, the elastic body 22 made of a spring material is inserted and fitted in a longitudinally intermediate portion of the connecting shaft 14.
One end of the elastic body 22 is locked to spring stoppers 35 and 36 provided on the arcuate members 31 and 32, and the other end is provided below the connecting shaft 14 and between the side plates 11 and 12. The elastic body 22 is engaged with the stop shaft 18 so that the roller 21 can be pressed against the outer peripheral surface of the winding shaft 4.

Further, as shown in FIG. 4, a large number of locking projections 47 are formed on the outer peripheral surface of the winding shaft 4, and the rollers 21 press the outer peripheral surface of the winding shaft 4. The adjustment-side belt 3 is less likely to slip on the winding shaft 4.

For example, when the load clamps shown in the above embodiments are used to clamp loads to be loaded on the bed of a truck, the fixed belt 2 having one end locked to the locking shaft 23 is used.
The other end of the adjusting side belt 3 and the one end of the adjusting-side belt 3 is hooked on the loading base, and the other end of the adjusting-side belt 3, that is, the free side, is wound with the belts 2 and 3 wrapped around the luggage. The end portion is wound around the winding shaft 4 by half winding, and is manually drawn into the main body 1 side. This retraction operation is not particularly necessary, but it is advantageous in that the retraction operation of the lever 5 can speed up the retraction operation by performing the retraction operation in advance.

Further, in this state, the free side of the adjustment side belt 3 is pressed against the outer peripheral surface of the winding shaft 4 by the roller 21 and held in position. Then, in this state, the lever 5 is repeatedly reciprocally rocked to transmit the power of the lever 5 to the drive member 8 via the transmission pawl 9 and rotate the winding shaft 4 in the pull-in direction via the mechanical brake 6. The load is clamped.

That is, when the lever 5 is swung in the clockwise direction shown by the solid line arrow in FIG. 5 with the feed pawl 91 of the transmission pawl 9 engaged with the gear portion 81, the feed pawl of the transmission pawl 9 is moved. The drive member 8 is rotated in the forward direction via 91 to screw the drive member 8 toward the flange 41, and the thrust due to this screw drive causes the drive member 8 and the reverse rotation preventing gear 62 and the brake plates 63, 64 to move. The power of the drive member 8 is transmitted to the winding shaft 4 while the collar 41 is integrated and the reverse rotation preventing claw 65 is slid with respect to the reverse rotation preventing gear 62 to force the winding shaft 4. The adjustment side belt 3 wound around the winding shaft 4 is moved forward and retracted toward the main body 1 side.

Further, when the lever 5 is swung in the counterclockwise direction shown by the dotted line arrow in FIG. 5 in the above state, the reverse rotation preventing gear 62 and the reverse rotation preventing claw 62 are engaged with each other so that the adjusting side belt 3 is moved. In the tensioned state, the reverse rotation of the winding shaft 4 is prevented, and the feed pawl 91 of the transmission pawl 9 slides on the gear portion 81 to rotate the drive member 8 without rotating the drive member 8. Only the rocker swings counterclockwise.

When the load is unfastened in order to unload the load from the truck bed, the return pawl 92 of the transmission pawl 9 is used.
Is engaged with the gear portion 81, and the lever 5 is repeatedly reciprocally rocked with respect to the main body 1. When the lever 5 is rocked in the clockwise direction shown by the solid arrow in FIG. 5, the transmission pawl 9 is returned. The pawl 92 slides on the gear portion 81, and only the lever 5 swings clockwise without rotating the drive member 8. Further, the lever 5 swings counterclockwise. Sometimes, the return pawl 92 and the gear portion 8
1 and the driving member 8 is rotated in reverse, and the driving member 8
Is screwed in a direction away from the collar portion 41, and by this screwing, the drive member 8 and the reverse rotation prevention gear 62 and the collar portion 41 are unintegrated, and the winding shaft 4 of the drive member 8 is removed. It becomes possible to reversely rotate by the amount of screw return, and by repeating this operation, the adjustment side belt 3 can be gradually pulled out from the main body 1 side and the tension of the belts 2 and 3 can be relaxed.

As described above, the feed claw 91 is engaged with the gear portion 81 and the lever 5 is swung to rotate the winding shaft 4 in the forward direction to adjust the belt 3 on the adjusting side.
Is pulled toward the main body 1 side to tension the belts 2 and 3, and at this time, the roller 21 presses the adjusting side belt 3 against the outer peripheral surface of the winding shaft 4 by the action of the elastic body 22. In this state, the adjustment side belt 3 is pulled toward the main body 1 side by the rotation of the winding shaft 4 by the operation of the operation lever 5, and the belts 2 and 3 can be tensioned by this pulling. The belts 2 and 3 can be tensioned without winding the belt 3 around the winding shaft 4 one or more times.

As a result, the adjustment side belt 3 drawn into the main body 1 side by the rotation of the winding shaft 4 by the operation of the operation lever 5 is not wound around the winding shaft 4, so that the belt 3 prevents the reverse rotation claw 65. The connecting shaft 14 for pivotally supporting
Since it does not come into contact with the pivot shaft 55 that pivotally supports the transmission pawl 9, the adjustment side belt 3 that is manually pulled in to the main body 1 side before the operation lever 5 is operated is not sufficiently tensioned. Even if the allowance is long, the winding shaft 4 can be freely rotated by operating the operation lever 5.

Therefore, before the operation lever 5 is operated, the adjustment-side belt 3 is sufficiently pulled in manually to the main body 1 side in advance, so that the pull-in length of the adjustment-side belt 3 by the operation of the operation lever 5 is not shortened. Since the belts 2 and 3 can be fastened to a predetermined tension, the work of fastening the belts can be easily performed, and even if the manual adjustment side belt 3 is not sufficiently pulled in, each belt 2, Since 3 can be brought into a predetermined tension state, the load can be always clamped effectively.

Further, the pressing body 20 is pivotally supported by the main body 1 at an intermediate portion near the locking shaft 23 in the longitudinal direction thereof, and at the opposite side of the roller 21 with the pivoting position interposed therebetween. Since the fixed side belt 2 is locked, a tension force which increases as the adjustment side belt 3 is pulled into the main body 1 by the rotation of the winding shaft 4 acts on the pressing body 20, and the adjustment side belt 3 The pressing force of the roller 21 that presses the belt against the outer peripheral surface of the winding shaft 4 increases. Even if the tension of each of the belts 2 and 3 increases due to the increase of the pressing force, the adjustment-side belt According to the rotation of the winding shaft 4, the 3 can be reliably pulled in to the main body 1 side without slipping.

The fixed belt 2 is attached to the locking shaft 23.
When the fixed side belt 2 is locked to the fixed rod 13,
It is preferable that the roller 21 is locked in a double manner so as to pass through the upper part and the lower part of the winding shaft 4. In this case, even if the posture of the main body 1 is changed, the roller 21 is always kept on the outer periphery of the winding shaft 4. The adjusting belt 3 can be pressed against the surface.

Further, since a large number of locking projections 47 are formed on the outer peripheral surface of the winding shaft 4, the adjustment side belt 3 can be pulled into the main body 1 side by the pressing of the roller 21 without slipping. Also, since the roller 21 that presses the adjustment-side belt 3 rolls, the frictional resistance between the adjustment-side belt 3 and the roller 21 is small, and the damage of the adjustment-side belt 3 can be reduced accordingly. The winding shaft 4 can be rotated with a light force, and the lever 5 can be swung with a light force.

Further, in the above-described embodiment, each holding mechanism 6
Since the transmission pawl 9 and the reverse rotation prevention pawl 65 can be held in the neutral position by the reference numerals 6 and 93, there is a possibility that the luggage may drop when the adjustment side belt 3 is to be pulled out quickly or when the load is unfastened. In the case where there is none, if the reverse rotation preventing pawl 65 is released from the reverse rotation preventing gear 62 and the transmission pawl 9 is released from the gear portion 81, the reverse rotation preventing gear 62 and the drive member 8 are in a freely rotatable state. By pulling the adjusting-side belt 3, the adjusting-side belt 3 can be freely pulled out from the winding shaft 4.

In the above embodiment, a large number of locking projections 4
Although 7 is formed on the outer peripheral surface of the winding shaft 4, the locking protrusion 47 may not be formed in particular, and the adjusting side belt 3 is formed by using the roller 21 on the outer peripheral surface of the winding shaft 4. Although the roller 21 is pressed, the roller 21 may not be used.

[0034]

As described above, in the load clamp according to the present invention, the main body 1 for locking the stationary belt 2 and the main body 1 are provided.
A winding shaft 4 which is rotatably supported by the main body 1 and which is rotatably supported by the main body 1 and which drives the winding shaft 4 so as to be switchable between forward and reverse. In the load clamp provided with the pressing body 20, the main body 1 has a pressing portion 21 that faces the outer peripheral surface of the winding shaft 4 and presses the adjustment-side belt 3 wound around the winding shaft 4. And an elastic body 22 that presses the pressing portion 21 of the pressing body 20 against the outer peripheral surface of the winding shaft 4 while pivotally pivoting the rotating body, and the pivoting position of the pressing body 20 with respect to the main body 1. Since the fixed side belt 2 is locked at a position opposite to the pressing part 21 with the elastic body 22 interposed therebetween, the pressing part 21 of the pressing body 20 winds the adjusting side belt 3 around the winding side. When the winding shaft 4 is rotated by the operation of the operation lever 5 while being pressed against the outer peripheral surface of the shaft 4. The adjusting side belt 3 can be drawn into the main body 1, the adjusting side belt 3 can be tensioned and stationary belt 2 without winding MakiSojiku 4 to one turn or more around the adjusting side belt 3.

Therefore, the connecting shaft for pivotally supporting the anti-rotation pawl for preventing the reverse rotation of the winding shaft 4 and the transmission pawl for transmitting the power of the operating lever 5 to the winding shaft 4 are pivotally supported. Even when the pivot shaft is provided in the vicinity of the winding shaft 4, the adjustment side belt 3 drawn into the main body 1 side by the operation of the operation lever 5 does not come into contact with the connecting shaft or the pivot shaft. Even if the adjustment side belt 3 that is manually pulled in to the main body 1 side before the operation is insufficient, the winding shaft 4 can be freely rotated without restriction by operating the operation lever 5.

As a result, before the operation lever 5 is operated, the adjustment side belt 3 is sufficiently pulled in manually to the main body 1 side in advance without shortening the pulling length of the adjustment side belt 3 by the operation of the operation lever 5. The belts 2 and 3 can be set in a predetermined tension state, so that the work of tightening the load can be easily performed,
Further, even if the adjustment side belt 3 is not pulled in manually enough, the belts 2 and 3 can be brought into a predetermined tension state, and the load can be effectively tightened.

Since the pressing body 20 is pivotally supported by the main body 1 and the fixed side belt 2 is locked at a position opposite to the pressing portion 21 with the pivoting position interposed, the winding body 20 is wound. Due to the tension force that increases as the adjustment belt 3 is pulled into the main body 1 by the rotation of the mounting shaft 4, the adjustment belt 3
It is possible to increase the pressing force of the pressing portion 21 that presses the outer peripheral surface of the winding shaft 4, and the increase of the pressing force causes the adjustment-side belt 3 to slip without slipping in accordance with the rotation of the winding shaft 4. It can be pulled into the main body 1 side.

Further, in the case where the outer peripheral surface of the winding shaft 4 is provided with a large number of locking protrusions 47 and the pressing portion 21 of the pressing body 20 can be rolled, the adjustment side belt 3 is pressed by the pressing portion 21. Since the adjusting side belt 3 is engaged with the plurality of engaging protrusions 47, the adjusting side belt 3 can be made less slippery with respect to the outer peripheral surface of the winding shaft 4, and the adjusting side belt 3 can be reliably pulled into the main body 1 side. Also, since the pressing portion 21 that presses the adjusting side belt 3 rolls, the frictional resistance between the adjusting side belt 3 and the pressing portion 21 can be reduced, and thus the adjusting side belt 3 can be less damaged. In addition, the winding shaft 4 can be rotated with a light force.

[Brief description of drawings]

FIG. 1 is a plan view of a load clamp machine according to the present invention.

FIG. 2 is a side view of FIG.

3 is an enlarged cross-sectional view taken along the line AA in FIG.

FIG. 4 is an enlarged sectional view taken along line BB in FIG.

FIG. 5 is an explanatory diagram showing a power transmission mechanism in a load-closed state.

FIG. 6 is a plan view showing a conventional example.

[Explanation of symbols]

 1 main body 2 fixed side belt 3 adjustment side belt 4 winding shaft 5 operation lever 20 pressing body 21 pressing portion (roller) 22 elastic body 47 locking protrusion

Claims (2)

[Claims] 1. A main body 1 that locks a fixed belt 2, a winding shaft 4 that is rotatably supported by the main body 1 and that winds an adjustment side belt 3, and a swingable support by the main body 1. And a manipulating lever 5 for driving the winding shaft 4 such that the winding shaft 4 can be switched between normal and reverse directions, in the main body 1 so as to face the outer peripheral surface of the winding shaft 4 and Adjusting belt 3 to be wound around
A pressing body 20 having a pressing portion 21 for pressing is pivotably mounted, and an elastic body 22 for pressing the pressing portion 21 of the pressing body 20 against the outer peripheral surface of the winding shaft 4 is provided. A load fastening machine, wherein the fixed side belt 2 is locked at a position opposite to the pressing portion 21 with a pressing body 20 sandwiching a pivotally attached position to the main body 1. 2. The outer peripheral surface of the winding shaft 4 has a large number of locking projections 4.
7. The load clamp machine according to claim 1, further comprising: 7, the pressing portion 21 of the pressing body 20 is rollable.