Trolleys for fire departments to transport goods

Abstract

A trolley (01) for fire departments for transporting goods, in particular for transporting firefighting equipment, comprising a frame (02) provided on one side with an operating frame (03) and mounted for movement on four rollers (04), wherein the operating frame (03) comprises at least two vertical bars (05), and wherein the lower end of each of the vertical bars (05) is fastened to the frame (02), and wherein at least two rollers (04) are each assigned a braking device (12) designed in the manner of a dead man's brake, and wherein an actuating device is provided between the two vertical bars (05), with which the braking devices (12) can be released, and wherein a movement transmission device is provided between the actuating device and the braking devices (12), with which an actuating force applied to the actuating device can be transmitted to the braking devices (12),and wherein the vertical bars (05) are made of hollow profile sections, wherein the movement transmission device comprises two push rods (10), each guided in the hollow profile of the two vertical bars (05), and wherein the actuating force for actuating the braking devices (12) can be transmitted by means of the two push rods (10) guided in the hollow profile, characterized in that a crosshead is attached to the lower end of the two push rods (10), which crosshead can be vertically adjusted by actuating the push rods (10) against a spring force, and wherein two pivotally mounted deflection levers (09) engage on the crosshead (08), which can be pivoted by vertical adjustment of the crosshead (08), and wherein two drive shafts (11) are provided on the trolley (01) for releasing two braking devices (12) each, and wherein the two deflection levers (09) each engage one of the two drive shafts (11),which can be driven in rotation by pivoting the reversing lever (09), and wherein the braking devices (12) can be released by driving the drive shaft (11), and wherein both drive shafts (11) run parallel to the longitudinal axis of the trolley (01).

Description

The invention relates to a trolley for fire weirs for transporting goods according to the preamble of claim 1.In such a generic embodiment, a trolley has a frame, an operating frame and four movable rollers. For the movement of the trolley, the trolley can be controlled on the operating frame and pulled or pushed by the operating personnel, for example. Rolling trucks of the generic type can be used in many applications and are used in fire weirs for transporting a wide variety of goods. The trolley serves in particular to transport devices from a fire vehicle quickly and with relatively little force to a place of use and subsequently return them again. Depending on the type of use / location, this results in specific functional requirements for such rolling trucks. This relates firstly to the design of the rolling carriage structure, in particular with regard to size, shape, control and so on. It is self-evident that a trolley can have, for example, both a box-like structure and a plurality of loading platforms lying one above the other. Also known are rolling trucks with only one platform.The construction of the load surface for the structures located above it is not essential for the construction of the rolling truck according to the invention and will not be explained in more detail below. The skilled person selects an embodiment advantageous for the respective transport task. For rolling trucks for use in the fire protection field, it is prescribed that the rollers be equipped with a so-called dead man brake. This means that without intervention by the operating personnel, the rollers of the rolling carriage are braked by corresponding mechanical brake devices, so that the rolling carriage is movable only when the dead man brake is released accordingly by the operating personnel. Such rolling trucks are therefore equipped with a suitable actuating device, with which the braking device designed as a dead man brake can be released.In order to be able to transmit the actuating forces necessary for the actuation of the brake devices from the actuating device to the brake devices, motion transmission devices are used. It is known from DE 20 2010 006 436 U1, for example, that Bowden cables are placed between the actuating device and the braking devices for transmitting the actuating forces. A disadvantage of these Bowden cables is that they must be laid very carefully. Since in this case narrow radii must be overcome in part, high force losses occur in the Bowden cables, so that a correspondingly high actuating force must be applied to the actuating device in order to release the brake. Accordingly, a correspondingly high force lever must be provided in the actuating device, which in turn correspondingly restricts the designability of the actuating device.German utility model DE 20 2012 000 446 U1 discloses a roll container with a dead man brake which is pushed by the user via a cross bar. By pulling up a cross bar arranged parallel to the cross bar, the deadman brake is released. For this purpose, the cross bar is connected to a brake system by means of push rods which are arranged in the hollow frame profiles forming the frame. The brake system locks the two rear rollers of the four rollers. The brake system is released via a transverse shaft which is rotated by means of levers attached to the lower ends of the push rods.German utility model DE 20 2018 005 275 U1 discloses a brake system which acts on all four wheels simultaneously. The brake system operates with an external linkage with deflection members, which is guided on the inside of the frame.German utility model DE 20 2007 009 242 U1 likewise discloses a brake system having an external linkage and having two transverse actuating shafts (brake shafts). However, the centrally located linkage for controlling the transversely located actuating shafts has the effect that the frame is of wide design and must be equipped with additional cross members. The linkage is completely free and is therefore susceptible to bending.German utility model DE 20 2015 006 824 U1 discloses a further development of the subject matter of German utility model DE 20 2012 000 446 U1, wherein the brake system arranged on the wheel displaces a sprung pin by means of a slide with an elevation in order to bring the brake element into the braking position on the wheel. In this way, a flatter frame can be created. In German utility model DE 20 2015 006 824 U1, a roll container having the same features as that of German utility model DE 20 2012 000 446 U1 is disclosed as prior art.German utility model DE 20 2011 050 838 U1 discloses a fire truck with rotatable rollers, on each of which a drum brake is arranged. On the inside of the frame, a brake linkage is likewise guided. The embodiment as a linkage, which is guided by means of deflection joints, also causes a greater frame height.German utility model DE 20 2018 005 141 U1 discloses a fire truck with rotatable rollers, which has a brake system which is triggered by means of two non-connected rods, wherein the two rods transmit force by means of inclined surfaces. The drum brakes are ultimately released from two cross shafts connected to the linkage. This frame also has a comparatively large frame height.Starting from this prior art, it is therefore the object of the present invention to propose a new trolley for fire weirs for transporting goods, which avoids the disadvantages of the prior art.According to the invention, a roller carriage for fire weirs for transporting goods, in particular for transporting fire weir equipment, is proposed, having a frame which is provided on one side with an operating frame and is mounted such that it can be moved on four rollers, wherein the operating frame comprises at least two vertical rods, and wherein the lower end of the vertical rods is in each case fastened to the frame, and wherein at least two rollers are in each case assigned a braking device which is designed in the manner of a dead man brake, and wherein an actuating device is provided between the two vertical rods, with which actuating device the braking devices can be released, and wherein a movement transmission device is provided between the actuating device and the braking devices, with which actuating force applied to the actuating device can be transmitted to the braking devices, and wherein the vertical rods are produced from hollow profile sections, wherein the motion transmission device comprises two push rods, which are each guided in the hollow profile of the two vertical rods, and wherein the actuating force for actuating the brake devices can be transmitted with the two push rods guided in the hollow profile. The rolling carriage is characterized in that a crosshead is fastened to the lower end of the two push rods, which crosshead is vertically adjustable against a spring force by actuating the push rods, and wherein two pivotably mounted deflection levers come into engagement on the crosshead, which can be pivoted by vertical adjustment of the crosshead, and wherein two drive shafts are provided on the rolling carriage for releasing in each case two brake devices, and wherein the two deflection levers are in engagement with in each case one of the two drive shafts, which can be driven in rotation by pivoting the deflection lever, and wherein the brake devices can be released by driving the drive shaft, and wherein the two drive shafts run parallel to the longitudinal axis of the rolling carriage. The trolley according to the invention is based on the use of hollow profile sections for producing the vertical rods of the operating frame. This operating frame has the purpose of enabling the rolling carriage to be controlled by the operating personnel. In this respect, the actuating device is also fastened to the operating frame. The use of hollow profile sections as vertical rods makes it possible for a respective push rod to be guided in the hollow profile of these vertical rods. These pressure rods are part of the motion transmission device and allow an almost loss-free transmission of the actuating forces along the vertical rods.Advantageous embodiments of the invention are the subject matter of the dependent claims.A particularly simple form of the operating frame results if a horizontal rod is fastened between the two vertical rods, which horizontal rod forms a guide rod on which the rolling carriage can be controlled.For fastening the horizontal rod serving as a guide rod, it is advantageous if fastening profiles are provided on the outer side of the vertical rods, respectively, on which the ends of the horizontal rod are indirectly or directly fixed.The almost loss-free transmission of force by means of the two push rods requires as a result only a relatively low actuating force to be applied by the operator. This makes it possible for the actuation to take place by means of an actuating rod which is arranged above the vertical rod and thus has substantially no force lever when the actuating rod is pressed down. However, by arranging the actuating rod above the vertical rod, the cargo space above the frame is largely kept free, so that the rolling carriage can be loaded without problems even in the region of the actuating device.In order to enable the simplest possible transmission of force from the actuating rod to the two push rods, it is advantageous if the ends of the actuating rod come to rest against the upper ends of the push rods guided in the hollow profile of the two vertical rods. In this way, the actuating force can be transmitted directly from the ends of the actuating rod to the two push rods. In what way the actuating force is passed on further from the two push rods in the direction of the individual brake devices, it is fundamentally arbitrary. According to the invention, it is provided that a crosshead is fastened to the lower end of the two push rods, which crosshead can be adjusted vertically counter to a spring force by actuation of the push rods. On the crosshead itself, a pivotably mounted deflection lever engages, which is pivoted by vertical displacement of the crosshead. In this way, the inner adjusting movement of the crosshead is converted into a rotational adjusting movement of the reversing lever.The deflection lever itself is in engagement with a drive shaft which is rotationally driven by pivoting the deflection lever.The drive shaft in turn is then in engagement with at least one brake device on a roller, so that the brake device is released by driving the drive shaft.Which type of drive shaft is used is basically arbitrary. According to a preferred embodiment, the drive shaft is designed in the manner of a hexagonal shaft.If all four rollers of the rolling carriage are to be braked jointly, it is advantageous if a common drive shaft is provided for releasing two respective brake devices. As a result, by pressing on the actuating rod, the corresponding adjustment of the two pressure rods and by adjusting the crosshead fastened thereto, a simultaneous rotational movement of the two drive shafts can be effected, so that then by rotating the two drive shafts, the brake devices on all four rollers are simultaneously released.Furthermore, it is according to the invention that two drive shafts are provided on the rolling carriage for releasing two brake devices in each case, wherein both drive shafts run parallel to the longitudinal axis of the rolling carriage. This ensures that both drive shafts each actuate a roller at the front of the rolling carriage and a roller at the rear of the rolling carriage.An embodiment of the invention is schematically illustrated in the drawings and is explained in the following by way of example.The following are shown: FIG. 1 shows a trolley for transporting goods in a perspective lateral view; FIG. 2 shows the trolley according to FIG. 1 in a side view from the front; FIG. 3 shows the rolling carriage according to FIG. 1 in a lateral view from a transverse side; FIG. 4 shows the rolling carriage according to FIG. 3 with the actuating device actuated; FIG. 5 shows the operating frame of the rolling carriage according to FIG. 1 in cross section with the actuating device not actuated; FIG. 6 shows the operating frame according to FIG. 5 in cross section when the actuating device is actuated. FIG. 7 shows a vertical rod with a push rod of the operating frame according to FIG. 5 supported therein in enlarged cross section; FIG. 8 shows the rolling carriage according to FIG. 1 in a view from below; FIG. 9 shows the rolling carriage according to FIG. 8 in an enlarged detail in a view from below; FIG. 10 shows the rolling carriage according to FIG. 1 in a view from above.FIG. 1 shows a trolley 01 for transporting goods, as can be used in fire weirs. The trolley comprises a frame 02, an operating frame 03 and four rollers 04. In order to be able to adapt the rolling carriage to different transport requirements, different floors or platforms or other support structures can be fastened on the upper side of the frame 04.The operating frame 03 is formed by two vertical rods 05 and a horizontal rod 06 fastened between the two vertical rods 05. By moving the horizontal rod 06, the trolley 01 can be moved by the operating personnel. The rollers 04 are each equipped with a braking device designed as a dead man's brake, so that the trolley 01 cannot roll away unintentionally without operating personnel.FIG. 2 shows the trolley 01 in a side view. Above the horizontal rod 06, the rectangular operating frame 03 has an adjustably mounted actuating rod 07 which serves for releasing the braking devices in the rollers 04, which braking devices are designed as dead man brakes. If the dead man brake of the rolling truck 01 is to be released, the operator simultaneously engages the actuating rod 07 and the horizontal rod 06 with one or both hands and presses the actuating rod 07 downward in the direction of the horizontal rod 06. The operator's operating force is transmitted to a crosshead 08. The crosshead 08 in turn engages with two deflection levers 09, which are pivoted by the downwardly directed actuating movement of the crosshead 08.FIG. 3 shows the rolling carriage 01 with the crosshead 08 and a deflection lever 09 in a lateral view. The crosshead 08 is in the non-actuated state as shown in FIG. 3. In this non-actuated state of the crosshead 08, a corresponding tension spring is pressed upward, and the dead man brake on the rollers 04 is thereby locked.FIG. 4 shows the trolley 01 after the actuating rod 07 has been pressed downward by the operator. This actuating force moves the crosshead 08 downward, and the two reversing levers 09 are pivoted as a result. Two pressure rods 10 are used to transmit the actuating force from the actuating rod 07 to the crosshead 08, which are guided along the hollow profile of the two vertical rods 05. This will be explained in more detail below.FIG. 5 shows the operating frame 03 of the rolling carriage 01 in cross section. The two push rods 10 are displaceably mounted in the hollow profile of the two vertical rods 05, wherein, when an actuating force is applied to the actuating rod 07, the latter can be transmitted to the crosshead 08 almost without losses.FIG. 6 shows the operating frame 03 after the actuation of the actuating rod 07. The ends of the actuating rod 07 indirectly engage at the ends of the push rods 10, so that when the actuating rod 07 is pressed, the two push rods 10 are also displaced downward. This adjusting movement of the two push rods 10 then deflects the crosshead 08 downward.FIG. 7 shows a vertical rod 05 with the push rod 10 mounted therein in a displaceable manner in the hollow profile of the push rod 05 in enlarged cross section. The horizontal rod 06 is fixed by means of suitably suitable slot nuts to the fastening profile provided on the outer side of the vertical rod 05.FIG. 8 shows the trolley 01 in a view from below. The cross head 08 can be seen, in which the two deflection levers 09 are in engagement. The ends of the deflection levers 09 are connected in a rotationally fixed manner to a respective drive shaft 11 so that the drive shafts 11 are rotationally driven by pivoting of the deflection levers 09.FIG. 9 shows the crosshead 08, the reversing lever 09 and the drive shaft 11 in an enlarged detail. It can be seen that pressing down the crosshead 08 and the resulting pivoting movement of the reversing lever 09 cause a rotational actuating movement of the drive shaft 11 which is used to release the brake device in the roller 04.FIG. 10 shows the trolley 01 in a view from above. It can be seen that the two drive shafts 11, which are each designed in the manner of hexagonal shafts, are in engagement with the brake devices 12 of two respective rollers 04. As a result, the dead man's brake on the four brake devices 12 of all four rollers 04 can be simultaneously released by pressing on the actuating rod 07.

Claims

Roller carriage (01) for fire weirs for transporting goods, in particular for transporting fire weir equipment, having a frame (02) which is provided on one side with an operating frame (03) and is mounted such that it can be moved on four rollers (04), wherein the operating frame (03) comprises at least two vertical rods (05), and wherein the lower end of the vertical rods (05) is in each case fastened to the frame (02), and wherein at least two rollers (04) are in each case assigned a braking device (12) which is designed in the manner of a deadmann brake, and wherein an actuating device is provided between the two vertical rods (05), with which actuating device the braking devices (12) can be released, and wherein a movement transmission device is provided between the actuating device and the braking devices (12), with which an actuating force applied to the actuating device can be transmitted to the braking devices (12), and wherein the vertical rods (05) are produced from hollow profile sections, wherein the movement transmission device comprises two push rods (10), which are each guided in the hollow profile of the two vertical rods (05), and wherein the actuating force for actuating the braking devices (12) can be transmitted with the two push rods (10) guided in the hollow profile, characterized in that a crosshead is fastened to the lower end of the two push rods (10), which crosshead can be adjusted vertically counter to a spring force by actuating the push rods (10), and wherein two pivotably mounted deflection levers (09), which can be pivoted by vertical adjustment of the crosshead (08), engage on the crosshead (08), and wherein two drive shafts (11) are provided on the rolling carriage (01) for releasing two brake devices (12) in each case, and wherein the two deflection levers (09) are in engagement with in each case one of the two drive shafts (11), which can be driven in rotation by pivoting the deflection lever (09), and wherein the brake devices (12) can be released by driving the drive shaft (11), and wherein the two drive shafts (11) run parallel to the longitudinal axis of the rolling carriage (01).Trolley according to claim 1, characterised in that a horizontal rod (06) is fastened between the two vertical rods (05), which horizontal rod is designed in the manner of a guide rod on which the trolley (01) can be controlled.Trolley according to claim 1 or 2, characterised in that fastening profiles are provided on the outer side of the vertical bars (05), on which the ends of the horizontal bar (06) can be fixed.Trolley according to claim 2 or 3, characterised in that above the horizontal rod (06) an actuating rod (07) is provided which is mounted on the two vertical rods (05) so as to be vertically adjustable.Trolley according to claim 4, characterised in that the ends of the actuating rod (07) come to engage indirectly or directly at the upper ends of the push rods (10) guided in the hollow profile of the two vertical rods (05).Rolling trolley according to one of Claims 1 to 5, characterized in that the drive shaft (11) is designed in the manner of a hexagonal shaft.

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