JP3046396U - Manual truck - Google Patents

Abstract

(57) [Summary] [PROBLEMS] When climbing up and down stairs, sliding friction does not occur between the body frame and the endless wire rope, so that the transport vehicle can run smoothly and the endless wire rope is also damaged. Providing a difficult manual carrier. SOLUTION: A traveling wheel is provided at a front end portion of a body frame and a handle is provided at a rear end side, and a supporting pulley is provided at each of front and rear ends on both sides of the body frame. A required number of auxiliary pulleys are independently rotatably installed on the lower edges of both side surfaces independently, and an endless wire rope is wound around these support pulleys and auxiliary pulleys. Is a manual transport vehicle that can travel on an inclined surface or a stair surface due to friction on the traveling surface of the vehicle.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention relates to a manual transport vehicle, and is used especially when carrying luggage and going up and down stairs.

[0002]

[Prior art]

 In this type of conventional manual transport vehicle, support pulleys are rotatably installed on the front and rear ends on both sides of the body frame, and tracks are wound around these support pulleys, thereby causing friction between the track and the running surface of the tracks. Is known (Japanese Patent Application Laid-Open No. 7-149242).

[0003]

[Problems to be solved by the invention]

 However, in such a conventional manual transport vehicle, when climbing up and down stairs, the frame comes into contact with the back side of the caterpillar and sliding friction occurs, so that the transport vehicle cannot travel smoothly and the caterpillar is easily damaged. The inconvenience was that:

[0004] The problem of the present invention is to eliminate such disadvantages.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, in the manual transport vehicle according to the present invention, a traveling wheel is provided at the front end of the vehicle body frame and a handle is provided at the rear end side, and the traveling wheel can travel on a flat surface. In a manual carrier, supporting pulleys are independently rotatably installed at both front and rear ends of the body frame, and a required number of auxiliary pulleys are independently rotatably installed at lower end edges of both side surfaces, An endless wire rope is wound around these support pulleys and auxiliary pulleys, and the endless wire rope can travel on an inclined surface or a stair surface due to friction with a running surface of the end rope. In this case, since an auxiliary pulley is interposed between the endless wire rope and the body frame, sliding friction occurs between the body frame and the endless wire rope. It does not occur, but the auxiliary pulley over the trajectory of advance laid endless wire rope can be moved while rotating.

If an elastic body is provided on the outer peripheral surface of the endless wire rope, the impact received from the running surface can be absorbed by the elastic body, so that the stairs can be smoothly moved up and down.

[0007] Further, if a ball silent chair is installed between the support pulley and the rotation axis of the support pulley, the rotation of the support pulley is controlled so that the endless wire rope can move only in the traveling direction of the carrier. It can be controlled quietly without a shock and with a simple structure, and since the endless wire rope does not rotate in the reverse direction of travel, it can be easily stopped in the middle of stairs. . The control of the rotation can be released as appropriate.

[0008]

[Embodiment of the invention]

 1 is a side view of the manual transport vehicle according to the present invention, FIG. 2 is a front view seen from the back side, FIG. 3 is an enlarged sectional view taken along the line III-III in FIG. 1, and FIG. 4 is a sectional view taken along the line IV-IV in FIG. FIG. 5, FIG. 5 is an enlarged sectional view taken along the line VV in FIG. 1, FIG. 6 is a view of the same use state, and FIG. 7 is a sectional view of the support pulley.

In FIG. 1 and FIG. 2, M is a manual transport vehicle, and 10 is its body frame. The frame 10 is formed by arranging side bars 11, 11 having a U-shaped cross section at predetermined intervals, and connecting and connecting the horizontal bars 12, 12,. The upper surface of the vehicle body frame 10 functions as a carrier A. Reference numeral 13 denotes a handle for inclined traveling, which is installed on the side rods 11, 11 of the vehicle body frame 10. The inclined traveling handle 13 extends to the rear end of the vehicle body frame 10 and is a place where an operator grips when operating the manual transport vehicle M and traveling on an inclined surface. Reference numeral 13a denotes a flat traveling handle, which is a place where an operator grasps when the manual transport vehicle M is operated to travel on a flat surface. Reference numeral 14 denotes a frame, which is provided on the handle 13 or the side bars 11, 11 of the vehicle body frame 10. The frame 14 protrudes from the upper surface of the vehicle body frame 10 and surrounds the periphery of the carrier plate A.

Reference numerals 15 and 15 denote running wheels, which are provided at the front end of the vehicle body frame 10 via an axle 16. When traveling on a flat traveling surface, the operator can grasp the flat traveling handle 13a, lift the rear end of the transport vehicle M, and travel with the traveling wheels 15,15.

Reference numeral 17 denotes an L-shaped auxiliary plate, which is installed on the rear side of the vehicle body frame 10 so as to cover the axle 16. This auxiliary plate 17 allows the worker to scoop the load B on the loading platform A and prevent the loading B from sliding off the loading platform A.

Next, reference numerals 21 and 21 denote front support pulleys, and 22 and 22 denote rear support pulleys, which are installed at the front and rear portions of the side rods 11 and 11 in the vehicle body frame 10, respectively. Non-slip such as knurling is formed on the peripheral surfaces of these support pulleys 21 and 22, and a peripheral groove 25 is formed at the center thereof (see FIG. 7). The function of the circumferential groove 25 will be described later.

Here, the rear support pulley 22 will be described in detail with reference to FIGS. 3 and 4. In these figures, reference numeral 221 denotes a bearing, which rotatably supports the rear support pulley 22. Reference numeral 222 denotes a slide member which is fixed to the bearing 221 and is capable of moving back and forth along the side rod (of the vehicle body frame 10). The slide member 222 has an elongated hole 223, and mounting bolts 224, 224 penetrate the side member (of the vehicle body frame 10) 11. The slide member 222 can slide within the range of the long diameter of the long hole 223. Note that nuts 225, 225 are screwed onto the mounting bolts 224, 224 to prevent the nuts 225, 225 from falling off.

Next, reference numeral 226 denotes a nut member, which stands on the side rod (of the vehicle body frame 10) 11. A bolt member 227 is screwed into the nut member 226. The tip surface of the bolt member 227 is in pressure contact with the bottom surface of the slide member 222 (since the slide member 222 is pulled in the direction of the vehicle body frame 10 by the endless belt 50 described later). Therefore, by sliding the bolt member 227 with respect to the nut member 226, the slide member 222 can be moved forward and backward. A nut 226a is screwed into the bolt member 227 and locked together with the nut member 226 by a double nut structure so that the bolt member 227 does not screw.

Reference numeral 30 denotes a braking mechanism (corresponding to the “reverse rotation preventing means” of the present invention), which is installed on the bearing 221 of the rear support pulley 22. In the braking mechanism 30, reference numeral 31 denotes a cam plate, which is fixed to the bearing 221. The cam plate 31 has a shaft hole 32 at the center. The shaft body 228 of the rear support pulley 22 passes through the shaft hole 32. A pair of arc-shaped holes 33, 33 are formed around the shaft hole 32 in the cam plate 31. The minor diameters of the arc-shaped holes 33, 33 gradually increase counterclockwise in FIG. Next, reference numeral 34 denotes a support plate, between the cam plate 31 and the bearing 221, the shaft 228 passes freely. Rollers 35, 35 are rotatably mounted on the support plate. The rollers 35, 35 are inserted into the arc-shaped holes 33, 33 of the cam plate, and the rotation thereof is braked on the small-diameter side of the arc-shaped holes 33, 33. Incidentally, because it is pulled by the car body frame 10 direction by the support plate 34 is tension spring 331, the cam plate 31 is a result of it being a this to maintain a state of constantly Figure 4, the shaft 228 in the counterclockwise direction (FIG. 4 ), The rollers 35, 35 can move to the large-diameter side of the arc-shaped holes (of the cam plate 31) 33, 33 and can always rotate, so that the shaft body 228 and thus the rear support The pulley 22 is rotatable, and the transport vehicle M can move backward. However, when the shaft body 228 is about to rotate in the direction of clockwise (in FIG. 4), the rollers 35 and 35 is moved to the small diameter side of the arc-shaped hole (cam plate 31) 33, 33 contact Therefore, the shaft 228 and thus the rear support pulley 22 cannot rotate, and the carrier M cannot move forward (to the left in FIG. 1).

If the operation wire W is pulled and the support plate 34 is rotated counterclockwise (as shown in FIG. 4) against the tension spring 331, the rollers 35, 35 become arcuate holes (of the cam plate 31). Since the shafts 228 rotate clockwise (in FIG. 4) in order to move to the large diameter side at 33, 33, the braking state is released. Using these conditions, it is possible to control the traveling of the transport vehicle M on a slope, traveling on stairs, and stopping.

In FIGS. 1, 2 and 5, reference numerals 40, 40,... Designate auxiliary pulleys, which rotate at the lower end edges of the side rods 11, 11 in the vehicle body frame 10 via bearings 41, 41,. It is installed as possible. This auxiliary pulley 40 also functions as a wheel because it projects below the lower edge of the body frame 10. The auxiliary pulley 40 also has a circumferential groove 26 formed therein. Although not shown, if the side rods 11, 11 having a U-shaped cross section that opens downward are used, the side rods 11, 11 can be used as bearings.

Reference numeral 50 denotes an endless belt, which is wound around the front support pulley 21, the rear support pulley 22, and the auxiliary pulleys 40, 40,. The endless belt 50 has an elastic band (corresponding to the "elastic body" of the present invention) 52 attached to the outside of an endless wire rope 51 (see FIGS. 5 and 7). When the endless belt 50 is wrapped around the front support pulley 21 and the rear support pulley 22, the endless wire rope 51 is inserted into the circumferential grooves 25, 25 of the support pulleys 21, 22 and the circumferential groove 26 of the auxiliary pulley 40. As a result, the winding state of the endless belt 50 is further stabilized. Further, since the elastic belt 52 can absorb the impact received from the running surface, it can particularly smoothly move up and down the stairs. The tension of the endless belts 50, 50 can be adjusted by screwing the bolt member 227 with respect to the nut member 226 to move the slide member 222 back and forth.

When the load B is loaded on the carrier plate A of the manual transport vehicle M and travels on a flat surface, the traveling wheel 13 is gripped by the flat travel handle 13a of the transport vehicle M and the rear wheels are lifted. 15, 15 allows the vehicle to push forward (to the left in FIG. 1).

As shown in FIG. 6, when traveling up the stairs D, first, the pulling of the operation wire W (in FIG. 4) is released, and the moving direction of the transport vehicle M on the rear support pulley 22 is increased. Brakes the rotation to. In this state, the handle 13 for the inclined traveling of the transport vehicle M is grasped and pulled up rearward (to the right in FIG. 1) to bring the outer surfaces of the endless belts 50, 50 into contact with the corners of the steps. In this state, the transport vehicle M may be pulled rearward to ascend the stairs D. When descending the stairs D, the operation wire W may be pulled forward while the braking of the rear support pulley 22 (FIG. 4) in the forward direction of the transport vehicle M is released. If it is desired to stop on the way, the pulling of the operation wire W (in FIG. 4) may be released to brake the forward movement of the transport vehicle M.

[0021]

[Effect of the invention]

 The manual transport vehicle according to the present invention is provided with a traveling wheel at the front end of the body frame and a handle at the rear end side, and the traveling wheel can travel on a flat surface. Support pulleys are independently rotatably installed at the front and rear ends on both sides, and a required number of auxiliary pulleys are independently rotatably installed at the lower edges of the both sides, and endless wires are attached to these support pulleys and auxiliary pulleys. Since the rope can be wrapped and run on the slope or stairs due to the friction of the endless wire rope against the running surface, when the carrier is manually moved on the slope or stairs, the endless wire rope must be Since the auxiliary pulley is interposed between the body frame and the endless wire rope, there is no sliding friction between the body frame and the endless wire rope. Over the trajectory of Ropu auxiliary pulley it is capable to move while rotating.

Therefore, if this manual transport vehicle is used, no sliding friction occurs between the vehicle body frame and the endless wire rope when going up and down stairs, so that the transport vehicle can run smoothly. At the same time, the endless wire rope is not easily damaged.

If an elastic body is provided on the outer peripheral surface of the endless wire rope, the impact received from the running surface can be absorbed by the elastic body, so that the stairs can be smoothly moved up and down.

In addition, if a ball silent chair is installed between the support pulley and the rotation axis of the support pulley, the rotation of the support pulley is controlled so that the endless wire rope can move only in the traveling direction of the carrier. It can be controlled quietly without a shock and with a simple structure, and since the endless wire rope does not rotate in the reverse direction of travel, it can be easily stopped in the middle of stairs. . The control of the rotation can be released as appropriate.

[Brief description of the drawings]

FIG. 1 is a side view of a manual transport vehicle according to the present invention.

FIG. 2 is a front view as viewed from the back side.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is an enlarged sectional view taken along line VV in FIG. 1;

FIG. 6 is a view showing the use state of the manual transport vehicle according to the present invention.

FIG. 7 is a sectional view of a support pulley.

[Explanation of symbols]

 M… Manual carrier 10… Body frame 21… Front support pulley (support pulley) 22… Rear support pulley (support pulley) 30… Brake mechanism (reverse rotation prevention means) 40… Auxiliary pulley 51… Endless wire rope 52… Elastic Obi (elastic body)

Claims (3)

[Utility model registration claims] 1. A manual transport vehicle having a front wheel having a running wheel provided at a front end thereof and a handle provided at a rear end thereof, the running wheel being capable of running on a flat surface. And the required number of auxiliary pulleys are independently and rotatably installed on the lower edges of the both side surfaces, and an endless wire rope is wound around these support pulleys and auxiliary pulleys. A manual transport vehicle capable of traveling on an inclined surface or a stair surface by friction of a rope against a traveling surface. 2. The manual transport vehicle according to claim 1, wherein an elastic body is superposed on an outer peripheral surface of the endless wire rope. 3. The manual transport vehicle according to claim 1, wherein a ball silent chillet is provided between the support pulley and a rotation shaft of the support pulley.